CN101159320A - Material for packaging cell - Google Patents

Abstract

The battery packing material provided by the invention is characterized in that the material comprises the laminated body which is formed by stacking the aluminum foil and the internal stacking layer in sequence; wherein, the surface of at least the inboard layer of the aluminum foil is composed of the treating surface treated by the adhering treatment, the treating surface is stacked with the inner layer through the adhesive layer, and the treating surface is treated by the treating liquid which is composed of metal phosphate or non-metal phosphate and the aqueous synthetic resin after the surface degreasing treating of the aluminum foil.

Description

Battery use packing material

The application is that to be CN00801052.8 (international filing date is on April 10th, 2000), denomination of invention be dividing an application that the PCT that enters country's stage of " battery use packing material, battery packages with bag and manufacture method thereof " applies for to application number.

Technical field

The present invention relates to a kind of battery use packing material, this material has to have antiacid and laminated body organic solvent-resistant.Usually, 1. battery such as lithium battery comprise that those use the battery of liquid electrolyte, 2. those use the battery of colloidal electrolytes and 3. those use the battery of solid electrolytes, as lithium battery lithium ion battery and polymer battery etc. are arranged.

Background technology

At present, use the various sheet material of lamination to obtain various laminated structure, various packing bags that its processing is obtained again, these bags mainly are used as packaging material.On the other hand, recently, develop many lithium batteries, they all are to obtain by the lithium battery main body is packaged in the bag that is formed by laminated structure.

The lithium battery main body also is called lithium secondary battery, and its uses high molecular polymer electrolyte, and is called migration by lithium ion and produces the battery of electric current it contains positive and negative electrode simultaneously, and the active material of these electrodes is made of high molecular polymer.

Lithium battery includes the lithium battery main body and the lithium battery main body is included in interior external packing, and main body contains positive electrode current-collector (aluminium oxide or nickel)/positive electrode active material layer (by metal oxide, carbon black, metal sulfide, macromolecule such as electrolyte or polymer such as polyacrylonitrile positive electrode constitutes)/dielectric substrate is (by propylene carbonate, ethylene carbonate, the carbonates electrolyte that carbonic esters such as dimethyl carbonate or ethylidene methyl carbonic etc. are formed, formations such as inorganic solid electrolyte that lithium salts constitutes or colloidal electrolyte)/negative electrode active material layer (lithium metal, alloy, carbon, macromolecule such as electrolyte or polyacrylonitrile negative material)/anode collector (copper, nickel or stainless steel).

Being used to personal computer, portable terminal (as portable phone and PDA etc.), video camera, motor vehicle, robot, artificial satellite etc. as the purposes of lithium battery provides energy, also is used as the store energy storage battery.

Lithium battery includes the lithium battery main body and the lithium battery main body is included in interior external packing, main body contains positive electrode current-collecting member (aluminium or nickel etc.), positive electrode active material layer is (by metal oxide, carbon black, metal sulfide, macromolecule such as electrolyte or polyacrylonitrile positive electrode constitutes), electrolyte layer (propylene carbonate, ethylene carbonate, the carbonates electrolyte that dimethyl carbonate or ethylidene methyl carbonic etc. are formed, inorganic solid electrolyte that lithium salts constitutes or colloidal electrolyte etc.), negative electrode active material layer (lithium metal, alloy, carbon, electrolyte or polymer such as polyacrylonitrile etc.) and anode collector (by copper, negative materials such as nickel or stainless steel constitute).

External packing as above-mentioned lithium battery is to use cylindric or rectangular-shaped metal can (carrying out containerization by stamped sheet metal forms) or pocket (multilayer film that comprises outermost layer/aluminium lamination/sealant by processing forms).

These packings that are used for lithium battery have following problem.For metal can, have hard container outer wall, so the shape of lithium battery itself depends on metal can.Thereby the design that makes hardware must conform to the shape of battery packages, and the overall dimensions of hardware also depend on the shape of battery packages, and these problems have weakened the degree of freedom of hardware shaped design.

Though can not resembling, the bag of being made by multilayer film the hardware shape of using battery is not produced any restriction the metal can, yet, still do not develop any laminated body that can satisfy the battery packaging material of desired physical characteristic of lithium battery packaging material and function.Desired physical characteristic and function comprise following part.

For example, the part that the external packing of lithium battery must tight seal electrode (major part of lithium battery main body is linked to each other with hardware), thus make this part and air isolated fully.Therefore, the innermost layer of multilayer film must can adhere to electrode, particularly ought be used to have the environment of heat and pressure must can adhere to electrode down.Because electrode constitutes with metal, therefore require above-mentioned innermost layer that heat-sealing cementability with metal is arranged.

Even lithium battery must be able to keep also requiring to guarantee to seal stability and sealing system under the sealing effectiveness situation that lithium battery content temperature rises when charging and discharge, it also must be can anti-environment for use high temperature (as the high temperature on the summer meter panel of motor vehicle) and the low temperature of cold district, so also must be heat-resisting and cold-resistant.Be that lithium battery must its external packing still can keep gratifying sealing effectiveness in harsh environment.

Usually, in the occasion of lithium battery, the lithium cell electrolyte that comprises carbonate solution and lithium salts has a negative impact to external packing and has weakened bonding strength between each layer of multilayer film.That is, the solvent (carbonates) that is included in the lithium battery makes the adhesive layer swelling of each layer of multilayer film, thereby has weakened the bonding strength of each interlayer.

Produce acid and heat by the electrolyte hydrolysis, weaken the bonding strength of each interlayer thereby the effect of acid and heat is corroded the barrier layer of metal formation, battery is also lighted ignition by heat sometimes.If the temperature of battery rises, cause that the electromotive force decline of battery and the equipment that is connected with battery may shut down or take place dysfunction and cause fault.

The electrolyte hydrolysis that causes these problem main causes all enters inside battery by outside moisture penetration cell sealing system and causes.Therefore, external packing must have the barrier character that can stop outside vapor transmission packing.

The external packing of battery pack (comprising lithium battery) must be nonconducting, also necessarily can not also must be able to make and realize between each electrode that electric insulation is not so that electrode can short circuit to equipment (hardware) conduct electricity around packing.

The external packing of lithium battery is except being the external packing that it is also conceivable that container for moulding and lid sealing shape metal can, the bag.In this occasion, during the formed package of container part and lid, the resin that select to form the laminated body innermost layer must be a heat-sealing bonding, and the laminated structure that is used to form the container molding external packing must have good formability.

Disclosure of an invention

Generation of the present invention is just because of having seen these problems, therefore target of the present invention provides to the good trapping characteristic of having of packaging lithium battery (as steam etc.), has high mechanical properties (mainly comprising the anti-intensity that pierces through), can be used in the elevated temperature heat environment and can keep stable battery packages material under the influence of electrolyte, and provide the battery packages bag, and provide the method for this battery packages of producing with bag.

What relate to according to a first aspect of the invention is battery use packing material, it is characterized in that, it has the outermost layer of comprising/insulating course/innermost layer, or comprises the laminated body of outermost layer/insulating course/intermediate layer/innermost layer; Outermost layer described here is made of plastic raw material, and insulating course is to be made of the not penetrable raw material with barrier character, and the intermediate layer is to be made of plastic intermediate raw material, and innermost layer is made of the Thermoadhesive raw material.

Battery use packing material by the first aspect record is characterized in that insulating course is soft aluminium foil, and this soft aluminium foil has iron content in 0.3 to 9.0% scope.

Battery use packing material by the first aspect record is characterized in that insulating course is a metal forming, the processing that this metal forming is passed through degreasing or removed oxide on the surface of innermost layer one side.

Battery use packing material by the first aspect record, it is characterized in that, insulating course is a metal forming, this metal forming scribbles antiacid epithelium on the surface of innermost layer one side, this antiacid epithelium comprises phosphate coating, the chromate epithelium, at least a epithelium in fluoride epithelium or the triazine sulfhydryl compound epithelium.

Battery use packing material by the first aspect record, it is characterized in that, insulating course is a metal forming, the processing that this metal forming is passed through degreasing or removed oxide on the surface of innermost layer one side, and the surface of above-mentioned metal forming scribbles antiacid epithelium, this antiacid epithelium comprises phosphate coating, chromate epithelium, at least a epithelium in fluoride epithelium or the triazine sulfhydryl compound epithelium.

Battery use packing material by the first aspect record; it is characterized in that; insulating course scribbles the thick resin protective layer of 0.5 to 30 μ m on the surface of innermost layer one side, it is following resin more than 30% that this resin comprises at least a content: epoxy resin; phenol resin; melamine resin; polyimide resin; unsaturated polyester resin; the polyurethane resin; alkyd resins; the unsaturated carboxylic acid graft vistanex; polyester copolymer such as pet resin or polybutylene terephthalate (PBT) resin etc.; ionomer; vinyl-vinyl acetate copolymer; the copolymer of ethene and acrylic acid derivative; the copolymer of ethene and methacrylic acid derivative; the modifier of polyether resin or these resins.

Battery use packing material by the first aspect record, it is characterized in that, innermost layer is thick to be more than the 10 μ m, and innermost layer is made up of a kind of unsaturated carboxylic acid graft vistanex, the unsaturated carboxylic acid graft vistanex comprise unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft acrylic resin or, the any unsaturated carboxylic acid graft polyolefin in the unsaturated carboxylic acid graft polymethylpentene resin and the mixture of these resins, and these resins have fusing point and the Vicat softening point more than 70 ℃ more than 80 ℃.

Battery use packing material by the first aspect record, it is characterized in that, at least form the dried lamination adhesive phase that dried lamination is formed with adhesive between one deck between each layer of relative innermost layer one side of insulating course, above-mentioned dried lamination comprises host and curing agent with adhesive phase, this host is the blending resin of mylar and bisphenol A type epoxy resin, mylar contains sour composition and pure composition, sour composition wherein contains decanedioic acid, M-phthalic acid, terephthalic acid (TPA), suberic acid, azelaic acid, in 11 carbon diacid and the thapsic acid at least two kinds, wherein pure composition contains ethylene glycol, at least a in hexylene glycol and the diethylene glycol, curing agent comprises the polyisocyanates composition.

Battery use packing material by the first aspect record it is characterized in that, but innermost layer is to constitute by contain the two-layer at least above coextrusion resin bed that has the method for the resin bed of thermal viscosity to form to metal by coextrusion.

Battery use packing material by first aspect record is characterized in that, innermost layer is by containing by coextrusion metal heat bonding not, but the two-layer at least above coextrusion resin bed that the method for the resin bed of heat bonding forms between the innermost layer constitutes.

According to a second aspect of the invention, what relate to is the battery packages bag, it is characterized in that, the battery packages bag is to be formed by laminated structure, this laminated structure has the resin bed of a basic unit, an insulating course and a Thermoadhesive at least, here the laminated structure of being said is that paired thin slice is superimposed, wherein the Thermoadhesive resin bed of thin slice is superimposed toward each other in pairs, in pairs thereby the superimposed peripheral end of thin slice is provided with the heat bonding part and is joined to one another by heat-sealing and forms heat seal lands, and has following relationship formula: D ₀＜(D ₁+ D ₂)/2, the D in the formula ₁And D ₂Be the thickness separately of the Thermoadhesive resin bed of paired thin slice, D ₀Be the thickness of heat bonding part.

The battery packages bag that relates to according to a third aspect of the invention we, it is characterized in that, the battery packages bag is to be formed by laminated structure, this laminated structure has a basic unit at least, the resin bed of an insulating course and a Thermoadhesive, here the laminated structure of being said is that paired thin slice is superimposed, wherein the Thermoadhesive resin bed of thin slice is superimposed toward each other in pairs, in pairs thereby the peripheral end of thin slice is provided with the heat bonding part and is joined to one another by heat-sealing and forms heat-sealing, thin slice has the unsealing part that links to each other with heat seal lands in pairs, and the folding laterally appropriate section with laminated structure of this unsealing part is bonding.

What relate to according to a forth aspect of the invention is the manufacture method of battery packages with bag, it is characterized in that, the manufacture method of battery packages bag is made up of following steps: make to have basic unit, the laminated structure of insulating course and Thermoadhesive resin bed is processed to form the step of tubular, in the laminated structure of tubular, put into the step of the flat tabular lithium battery main body that has electrode nipple, thereby by heat-sealing the overlapping side of tubular laminated structure partly is bonded together and forms sealing back seam, the laminated body end of heat-sealing and electrode nipple opposition side, the laminated body end of heat sealed electrode joint one side forms the step of heat bonding part; And cut off the laminated body end of electrode nipple and opposition side and cut off the step of the laminated body end of electrode nipple one side.

What relate to according to a fifth aspect of the invention is the battery packages material, it is characterized in that, the laminated structure of battery packaging material by aluminium foil and interior layer through lamination sequentially and form, surface at least one la m of above-mentioned aluminium foil is to be made of the treated side that imposes easy bonding processing, and interior layer is by adhesive phase and the bonding lamination of this treated side.

Brief description of drawings

Fig. 1 is the execution mode figure that embodies by battery use packing material of the present invention;

Fig. 2 is the distortion illustration that embodies by battery use packing material of the present invention;

Fig. 3 is the profile of expression by the laminated structure of battery use packing material of the present invention;

Fig. 4 has shown the tacky state figure of battery packages according to the present invention with bag and tab;

Fig. 5 has shown the figure of battery packages according to the present invention with bag;

What Fig. 6 showed is the distortion illustration of battery packages according to the present invention with bag;

Fig. 7 is bag is used in expression according to battery use packing material of the present invention and battery packages other execution mode figure;

Fig. 8 performance be according to battery use packing material of the present invention and battery packages distortion illustration with bag;

Fig. 9 is the concrete illustration of battery packages according to the present invention with bag;

Figure 10 is other execution mode figure according to battery use packing material of the present invention and battery packages usefulness bag;

Figure 11 performance be according to battery use packing material of the present invention and battery packages distortion illustration with bag;

Figure 12 is the formation illustration that constitutes the laminated structure of battery use packing material;

Figure 13 represents to have the perspective view of battery packages according to the present invention with the lithium battery of bag;

Figure 14 infiltrates through the simulation schematic diagram of battery packages with bag about steam etc.;

Figure 15 is according to battery package bag of the present invention and is used for the bag figure that moisture-proof characteristic is tested;

Figure 16 is the pocket-shape bag figure of expression battery packages according to the present invention with bag;

Figure 17 is the figure of expression battery packages according to the present invention with the concavo-convex mold pressing shape bag of bag;

Figure 18 is the view of battery packages according to the present invention with bag and lithium battery;

Figure 19 is that auxiliary view is used to explain the manufacture method of battery packages according to the present invention with bag;

Figure 20 is the cross section view of battery packages shown in Figure 19 with bag;

Figure 21 is that auxiliary view is used to explain the distortion illustration of battery packages according to the present invention with the manufacture method of bag;

Figure 22 is that expression is by the distortion illustration of battery packages of the present invention with bag;

Figure 23 is the figure of expression according to the laminated structure of battery use packing material of the present invention;

Figure 24 is the layer structural map of expression battery packages according to the present invention with material;

Figure 25 is the perspective view of expression lithium battery;

Figure 26 is the cross section view of doing along the X-X line among Figure 25;

Figure 27 is the cross section view of doing along the Y-Y line among Figure 25.

Implement preferred plan of the present invention

First embodiment

With reference to the above-mentioned packaging material for lithium battery among the present invention of accompanying drawing detailed description.

Fig. 1 (a) is the enforcement illustration of packaging material for lithium battery of the present invention to Fig. 1 (d) demonstration.Wherein, what show among Fig. 1 (a) is basic layer pie graph, and what show among Fig. 1 (b) is the auxiliary perspective view that is used to explain lithium battery, and what show among Fig. 1 (c) is along the line X among Fig. 1 (b) ₁-X ₁What show in the cross section view of doing, Fig. 1 (d) is along the line X among Fig. 1 (b) ₂-X ₂The cross section view of doing.Fig. 2 (a) is another enforcement illustration of packaging material for lithium battery of the present invention to Fig. 2 (d) demonstration.Wherein, what show among Fig. 2 (a) is the basic layer structure section view of packaging material for lithium battery, what show among Fig. 2 (b) is the auxiliary perspective view that is used to explain the lithium battery structure, what show among Fig. 2 (c) is the perspective view of lithium battery with external packing of concavo-convex formed type, and what show among Fig. 2 (d) is along the line X among Fig. 2 (c) ₃-X ₃The cross section view of doing.What Fig. 3 showed is the cross section view of another embodiment of laminated body of the present invention.What Fig. 4 (a) showed to Fig. 4 (e) is the key diagram of another bonding embodiment of external packing among the present invention and tab, wherein, Fig. 4 (a) is the perspective view of lithium battery, Fig. 4 (b) is the perspective view of the lithium battery main body of bonding Thermoadhesive tab, Fig. 4 (c) is the perspective view of another lithium battery main body of adhesion heat adhesiveness tab, and what show among Fig. 4 (d) and Fig. 4 (e) is along the line X among Fig. 4 (a) when the thermal bonding tab that uses separately ₄-X ₄The cross section view of doing.Fig. 5 (a) is to the plane graph of the external packing shape of the pocket type of the lithium battery that is to use laminated body of the present invention of Fig. 5 (e ') expression and the sectional drawing of type separately.The shape view of the external packing that concavo-convex formed type is arranged of the lithium battery that is to use laminated body of the present invention that Fig. 6 (a) illustrates to Fig. 6 (d), wherein, Fig. 6 (a) is the perspective view of ground of the battery packages container of the concavo-convex formed type of single face, and Fig. 6 (a ') is along the line X among Fig. 6 (a) ₉-X ₉Cross section view, Fig. 6 (b) is the perspective view of two-sided concave-convex formed type battery packages, Fig. 6 (b ') is along the line X among Fig. 6 (b) ₁₀-X ₁₀Cross section view, Fig. 6 (c) is another the routine concept map that shows concavo-convex mold pressing battery packages center tap sheet position, Fig. 6 (d) shows that tab is set up the conceptual view of another location.

The present inventor finds by the problem to be solved in the present invention conscientiously being studied the back, can be by the packaging material that constitute by multi-ply construction, and the laminated structure 10 shown in the Fig. 1 (a) that is made of the various materials that the following describes addresses these problems, and finished the present invention in view of the above.The lithium battery 1 that the present invention relates to, as shown in Fig. 1 (b) and Fig. 1 (c), be to be sealed in the external packing 4 of pillow type (below be called pouch-type) shape of back of the body envelope part 5f by the lithium battery main body 2 that will have electrode 3, and joint 3 is partly exposed outside battery external packing 4, form.

Perhaps, shown in Fig. 2 (b) and 2 (d), make laminated body 10 moulding of single face at least (below, concavo-convex mold pressing) makes container ground 6, place lithium battery main body 2 in the concavo-convex mold pressing part 8 of container ground 6 wherein, lid 7 wherein is to use that form and this lid 7 of other laminated structure 10 to be placed on the edge 9 of container ground 6.Lithium battery main body 2 is placed in the mold pressing part 8 of container 6, and coats lithium battery main body 2 by lid 7, by the heat sealed perimeter part lithium battery is sealed in the external packing of mold pressing battery.

Battery external packing about above-mentioned pouch-type and concavo-convex mold pressing type (below, note is made a cup type sometimes) will be described in detail afterwards.

Basically, laminated structure 10 contains outermost layer 11/ insulating course, 12/ innermost layer 14 and lamination in this order.In addition, between insulating course 12 and innermost layer 14, the intermediate layer can be set.What Fig. 1 (a) showed is laminated structure 10, and this is configured with outermost layer 11/ insulating course 12/ intermediate layer, 13/ innermost layer 14 and lamination in this order.These layers of forming laminated structure 10 are formed by following material.Shown in Fig. 1 (d), the lithium battery that the present invention is correlated with, formation comprises the heat seal lands 5 of the part of electrode 3.

The outermost layer 11 of laminated structure 10 of the present invention is made of oriented polyester resin or oriented nylon resin.Can enumerate pet resin, polybutylene terephthalate (PBT) resin, PEN resin, PBN resin, polyester copolymer, polycarbonate resin etc. as mylar.Can enumerate polyamide as nylon, promptly (polymethaxylilene adipamide MXD6) waits crystallization or amorphous nylon for the copolymer of nylon 6, nylon 6,6, nylon 6 and nylon 6,6, nylon 6,10, poly-6I hexamethylene isoterephalamide.

When lithium battery was used to equipment (hardware), outermost layer 11 was the parts that directly contact with equipment, therefore, wished that outermost layer 11 is to be formed by the resin bed with insulating properties.Consider that the thickness of outermost layer 11 must be more than the 6 μ m owing to form the film of outermost layer 11 itself and have when producing pin hole etc. in the pin hole and the film course of processing.Preferably, the thickness of outermost layer 11 is in 12 to 25 mu m ranges.

In order to make outermost layer 11 have the high resistance pinhole characteristics and when improving it as the external packing of battery and the insulation characterisitic of equipment (hardware), outermost layer 11 also can be to be made of stack membrane.

This occasion, outermost layer 11 comprises at least one resin bed, and this resin bed is made up of two-layer above layer, and wherein the thickness of each layer all should reach more than the 6 μ m, more preferably in 12 to 25 mu m ranges.Following laminated structure 1) to 3) be the example of the outermost layer 11 of laminated structure.

1) orientation PETG film/oriented nylon

2) orientation PETG film/polyethylene film

3) oriented nylon/polyethylene film

By dried lamination DL, perhaps extrude lamination etc. outermost layer 11 and insulating course 12 are bonded together.

Above-mentioned insulating course 12 is to prevent that steam particularly from soaking into the layer of the inside that enters lithium battery 1 from the outside.The pin hole that self may form for fear of insulating course 12 produces harmful effect, with in order to reach stable machinability (be easy to make bag or be easy to carry out concavo-convex compression molding), also in order to make insulating course 12 have anti-pin hole, insulating course 12 is that metal (as aluminium or nickel) paper tinsel more than the 15 μ m forms by thickness, or is formed by inorganic compound (as silicon dioxide or aluminium oxide) film.Preferably, insulating course 12 is that soft aluminium in 20 to 80 mu m ranges constitutes by thickness preferably.

In order more to reduce the generation of pin hole, when the type of the external packing that makes lithium battery becomes concavo-convex formed type, in order in concavo-convex mold pressing battery packages, not form crackle, the present inventor has carried out conscientiously found that of research, by using iron-holder in 0.3 to 9.0% scope, more preferably, the aluminium material of iron-holder in 0.7 to 2.0% scope is during as insulating course 12, because the aluminium of this iron content is better than nonferrous aluminium aspect ductility, when the laminated structure that comprises this aluminium film is folded, be difficult for causing the generation of pin hole, and the sidewall during the concavo-convex mold pressing of the battery external packing of above-mentioned concavo-convex mold pressing type can form easily.Above-mentioned iron content is less than at 0.3% o'clock, and aluminium can not form the film with gratifying anti-pinhole characteristics, and can not improve formability.Iron content can not be satisfactory aspect flexibility above 9.0% aluminium, and the machinability to laminated structure has a negative impact in the process that forms bag.

The present inventor also finds, have following remarkable result when forming antiacid epithelium TR and protective layer 15 and the above-mentioned technology of compound use on the surface of aluminium film: can prevent aluminium film surface by hydrofluoric acid (HF) dissolving and corrosion, hydrofluoric acid is to be produced by electrolyte in the lithium battery main body 2 and reaction of moisture; Can improve the adhesion characteristic (adhesional wetting property) of aluminium film surface; Form stable bonding strength (see figure 3) in the time of can seeking between aluminium foil and innermost layer lamination.

Adducible as the antiacid layer TR that forms on the aluminium foil surface is the epithelium of phosphate or chromate.Phosphate is trbasic zinc phosphate, ferric phosphate, manganese phosphate, calcium phosphate or chromium phosphate.Chromate is a chromic acid chromium etc.

The surface is handled by the coupling improved properties and/or the surface roughening processing, improve the adhesion characteristic of aluminium foil surface.Above-mentioned coupling improved properties is handled can use silane coupler, organic titanium coupling agent or organo-aluminium coupling agent.

The organic titanium coupling agent can be four alkoxytitaniums, titanium acylate, titanium chelate etc.The organo-aluminium coupling agent can be a tri-alkoxy aluminium, aluminium chelate compound, aluminium acylate etc.

The surperficial roughening of aluminium foil is effective for the adhesion characteristic that improves aluminium foil surface.That is, in order to improve adhesion characteristic, usable acid or aqueous slkali carry out etch processes to aluminium foil surface, remove the aluminium oxide (Al on the aluminium foil surface ₂O ₃) so that increase surface area so that the surface has the anchoring characteristic by increasing surface roughness.

The formation of above-mentioned protective layer 15 is that any resin bed that is provided with on the surface of aluminium foil in the modifier of epoxy resin, phenol resin, melamine resin, mylar, unsaturated carboxylic acid graft vistanex or these resins contain above-mentioned acid resistance modification agent is realized.

Above-mentioned various process of surface treatment can compoundly use.For example,

(1) formation of aluminium insulating course 12/ acid-resisting epithelium TR

(2) aluminium insulating course 12/ forms acid-resisting epithelium TR/ and forms protective layer 15

According to the present invention, be used to improve the protective layer 15 of antacid modifier except comprising, can also form the second protective layer 15a, this protective layer does not comprise any antacid modifier that is used to improve.The second protective layer 15a contains epoxy resin, phenol resin, melamine resin, olefin resin, unsaturated carboxylic acid graft vistanex, any in the modifier of acrylic resin or these resins.

As the formation of the second protective layer 15a, for example by following arbitrary method.

(1) aluminium insulating course 12/ forms acid-resisting epithelium TR/ and forms the second protective layer 15a,

(2) aluminium insulating course 12/ forms acid-resisting epithelium TR/ and forms the protective layer 15/ formation second protective layer 15a.

According to the present invention, between insulating course 12 or above-mentioned protective layer 15 and innermost layer 14, can get involved the film of dried lamination DL or heat laminating TL, intermediate layer 13 is set.Above-mentioned intermediate layer 13 be protection insulating course 12 and be to prevent because the layer that electrode 3 that innermost layer 14 is hot sealing layer attenuation (because heat and due to pressure in the heat-sealing when forming bag) to be caused and aluminum insulating course 12 come in contact (short circuit).Also can and on the 13a of this first intermediate layer, the second intermediate layer 13b be set and form intermediate layer 13 by the first intermediate layer 13a by dried lamination DL.

Lamination intermediate layer 13 is for the environmental suitability of stabilize lithium battery (thermal endurance and cold resistance).The thickness in intermediate layer 13 is more than the 10 μ m, and fusing point is more than 80 ℃.Preferably, intermediate layer 13 makes and comprises the resin bed of at least one layer thickness in 12 to 25 mu m ranges, and this resin bed is to be formed by the modifier of mylar, vistanex or these resins or mixture.

Adduciblely be applicable to that the above-mentioned mylar that forms intermediate layer 13 is pet resin, polybutylene terephthalate (PBT) resin, PEN resin, PBN resin, polycarbonate resin and their copolymer or modifier.In addition, can enumerate acrylic resin as the said polyolefins resin, ethylene-propylene copolymer, ldpe resin, the medium density polyethylene resin, high-density polyethylene resin, linear low density polyethylene resin, the ethene-alpha-olefin copolymer that uses the single-point catalyst polymerization to produce, the polyvinyl resin of metal ion, the copolymer of ethene and methacrylic acid or acrylic acid derivative, polybutene resin, the unsaturated carboxylic acid graft polyvinyl resin, the unsaturated carboxylic acid graft polypropylene, the modifier of unsaturated carboxylic acid graft polymethylpentene and these polymer.

These resins can be orientation or non-orientation.

According to the present invention, the film by dried lamination DL can be bonded together innermost layer in the laminated structure of packaging material for lithium battery 14 and intermediate layer 13.Innermost layer 14 is formed by following material: the copolymer of the copolymer of unsaturated carboxylic acid graft vistanex, ethene and acrylic acid derivative or ethene and methacrylic acid derivative, metal ion crosslinked polyvinyl resin and these modifier or mixture.Preferably, the thickness of innermost layer 14 is more than 20, and the fusing point of the resin of formation innermost layer is more than 70 ℃ and Vicat softening point is more than 60 ℃.

In innermost layer, can use the innermost layer 14 formed by the vistanex that does not stick at metal '.But, in this occasion, innermost layer 14 ' and electrode 3 between by using Thermoadhesive tab 16 (bonding fully with external packing, thickness is more than the 15 μ m) can sealed (Fig. 4), and this tab 16 is formed by following material: the copolymer of unsaturated carboxylic acid graft polyolefin, metal ion crosslinked polyethylene, ethene or propylene and acrylic acid copolymer or propylene and acrylic acid or methacrylic acid or methacrylic acid derivative.More particularly, as shown in Fig. 4 (b),, and insert the external packing body and carry out adhering and sealing at the heat bonding part mounting of electrode Thermoadhesive tab 16 than electrode fabric width.Fig. 4 (d) is the line X among Fig. 4 (a) after this occasion bonding ₄-X ₄The cross section view of doing (among Fig. 4 (d), outermost layer 11, insulating course 12 and intermediate layer 13 are as one deck performance).In addition, Fig. 4 (c) shows is at the heat bonding part package thermal bonding tab 16 of the electrode of electrode 3 and inserts the example that heat bonding and sealing are carried out in external packing 4.Fig. 4 (e) is same with Fig. 4 (d), is illustrated in to simulation under this occasion behind the heat bonding along the line X among Fig. 4 (a) ₄-X ₄The cross section view of doing.

For innermost layer 14 is under the situation of pouch-type, concavo-convex mold pressing cotton ginning type, by the hot melt adhesion method electrode nipple sheet is formed sealing system with the multilayer build-up state.Yet, as the olefin resin of the innermost layer that forms the thermal welding part, because of its characteristic becomes fragile and forms crackle and pin hole easily herein.In addition, when hot melt, the electrode end sections of tab 16, pin hole does not take place so fusing makes the thickness of above-mentioned joint give innermost layer, but, if in order to strengthen the thermal endurance of innermost layer, innermost layer is by having dystectic individual layer olefin resin when forming, must using high pressure and high temperature so that by heat-sealing innermost layer is fused to together for a long time to innermost layer.This occasion, because the relation of heat, it is the quality characteristic of the lithium battery main body 2 of content that such fusion joining process has reduced thermal welding itself, and owing to cause other formation layer (as the outermost layer of mylar or nylon resin composition) of packaging material a thermal contraction takes place, thereby also damaged the function of battery packaging material.

The present inventor addresses this problem the various researchs back of having carried out as shown in Figure 1 to find: the innermost layer 14 that is formed by multi-ply construction is effective for addressing this problem, and this multi-ply construction is to constitute by the ground floor 14a of a surperficial side with than the 2nd layer of 14b of ground floor 14a relative inner.More particularly, following multi-ply construction can be used as innermost layer.

(1) film of the film of olefin resin and their modifier composition/unsaturated carboxylic acid graft polyolefin composition,

(2) film of the film of the film/ethene of olefin resin and their modifier composition and acrylic acid copolymer derivative thing composition or ethene and methyl acid derivative copolymers composition,

(3) film of compositions such as the film/metal ion crosslinked polyethylene of olefin resin and their modifier composition or metal ion crosslinked polypropylene,

It below is the typical example of olefin resin.

A) as polyacrylic resin

1) Noblen (fusing point: more than 150 ℃, Vicat softening point: more than 140 ℃),

2) ethylene-propylene copolymer (random propylene, block propylene or butylene copolymerization-atactic propene resin=terpolymer, fusing point is more than 110 ℃, Vicat softening point is more than 100 ℃)

B) as polyethylene type resin

1) fusing point: more than 90 ℃, Vicat softening point: the low density polyethylene (LDPE) more than 80 ℃, medium density polyethylene, high density polyethylene (HDPE), LLDPE, ethylene-propylene-diene copolymer, ethylene-propylene-butylene copolymer and the ethene-alpha-olefin copolymer that uses the single-point catalyst polymerization to produce

In addition, as acid-modified polyolefin resin (fusing point: more than 90 ℃, Vicat softening point: more than 80 ℃)

A) ethylene-vinyl acetate copolymer,

B) metal ion crosslinked polyethylene, metal ion crosslinked polypropylene,

C) unsaturated carboxylic acid graft polyolefin and their modifiers such as unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene, unsaturated carboxylic acid graft polymethylpentene,

D), can enumerate ethylene-methyl methacrylate methyl terpolymer (EMMA), ethylene-methyl methacrylate ethyl ester copolymer (EMA), ethylene-methyl acrylate copolymer (EMAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-acrylic acid copolymer (EAA), propylene-ethyl methacrylate copolymers (PMA) and propylene-ethyl acrylate (PAA) etc. as the copolymer of ethene or propylene and methacrylic acid or acrylic acid derivative.

The concrete example of innermost layer 14 multiple stratifications can be enumerated following formation,

(1) copolymer of low density polyethylene (LDPE) or LLDPE/ethene and methacrylic acid or acrylic acid derivative

(2) copolymer of ethylene-propylene copolymer/propylene and methacrylic acid or acrylic acid derivative

(3) low density polyethylene (LDPE) or LLDPE/metal corsslinking polyethylene

(4) ethylene-propylene copolymer/metal corsslinking polypropylene

(5) atactic propene class/unsaturated carboxylic acid graft homopolymerization type propylene

(6) block propylene class/unsaturated carboxylic acid graft homopolymerization type propylene

(7) homo-polypropylene class/unsaturated carboxylic acid graft random or graft type propylene

(8) random or block propylene class/homo-polypropylene class

(9) ethylene-propylene copolymer/polyethylene/vinyl-propylene copolymer

(10) ethylene-propylene copolymer/polyethylene/unsaturated carboxylic acid graft polyethylene

(11) homo-polypropylene class/atactic propene class

(12) atactic propene class/homo-polypropylene class/atactic propene class

(13) atactic propene class/block propylene class/atactic propene class

(14) atactic propene class/butylene random copolymerization propylene class

(15) homo-polypropylene class/butylene random copolymerization propylene class

The confficient of static friction and the coefficient of kinetic friction of wishing innermost layer 14 are below 0.5, preferably below 2.0 so that reach stable concavo-convex compression molding performance.In order to form innermost layer 14 with coefficient of friction like this, the material that forms innermost layer 14 preferably contains the above fatty acid amide lubricant of 500ppm (as erucyl amide, stearic amide or oleamide), or 1000ppm above have 100, the polysiloxane emollient of the molecular weight more than 000 (as dimethyl silicone polymer or PSI), or add polyorganosiloxane resin powder more than 3%.

Each layer for the laminated structure 10 that constitutes packaging material for lithium battery of the present invention can be handled by following surface activation, as Corona discharge Treatment, sandblast (blasting) is handled, oxidation processes or ozonation treatment be so that reach suitable stabilising membrane mouldability, the purpose of 2 machine-shaping of lamination processing and final products (concavo-convex mold pressing or make bag).

Can carry out the formation of each layer of the outermost layer 11 of laminated structure of the present invention and insulating course 12 or outermost layer 11, insulating course 12, intermediate layer 13 and innermost layer 14 or the lamination of each layer by T-pattern method, inflatable method or coetrusion etc.When needs, can form the secondary film by coated technique, evaporation process, ultraviolet curing process or electronic beam curing technology etc.Can also adjacent layer be bonded together by attaching process, dried laminated process, the methods such as laminated process, coextrusion laminated process or heat laminating technology of extruding and realize laminationization.In the occasion of carrying out above-mentioned dried lamination, use the common adhesive of dried lamination can be with than each layer laminate of insulating course 12 more laterals.But during than the dried lamination in the insulating course 12 relative innermost layer sides, the preferred adhesive of forming by aftermentioned that adopts.

When being used to form the formation of lithium battery with the laminated structure of external packing is to finish when bonding by dried laminated process, following problem may take place: owing to cause each layer to be stripped from as the effect of the carbonates solvent of electrolyte for Lithium Battery composition, and because the effect of the hydrofluoric acid of lithium salts and water reaction generation causes the adhesive surface of insulating course 12 innermost layer side surfaces to be stripped from.The inventor to the problems referred to above etc. through conscientiously discovering: by to than the insulating course 12 of laminated structure 10 relatively for inboard each layer bonding make as have following composition carry out dried lamination the time adhesive, just can prevent peeling off of above-mentioned each layer and peeling off of the adhesive surface on insulating course surface, thereby make the laminated body of good heat resistance.

This adhesive is made of host and curing agent, host is that the blending resin by mylar and bisphenol A type epoxy resin constitutes, mylar is by the two or more at least sour composition that contains in decanedioic acid, M-phthalic acid, terephthalic acid (TPA), suberic acid, azelaic acid, 11 carbon diacid and the thapsic acid, constitute with at least a pure composition that contains in ethylene glycol, hexylene glycol and the diethylene glycol (DEG), curing agent then comprises polyisocyanates composition (TDI, MDI, IPDI, FDI or ADI).

Resin during as above-mentioned extruding lamination or heat laminating is owing to use the unsaturated carboxylic acid graft polyolefin, and when tackifying, anti-content rerum natura also is enhanced.

Above-mentioned when extruding lamination when carrying out, adhesion promotion method as the bonding force stabilisation that makes bonding each interlayer can make the bonding strength of each interlayer reach stable by bonding strength enhanced process or surface activity metallization processes (as ozonisation technology), bonding strength enhanced process wherein be will with another layer bonding the layer adhesive surface be coated with thick film with about 1 μ m, film is by mylar, polyether resin, urethane resin, polyethers-urethane resin, the polyester urethane resin, isocyanate resin, vistanex, polyethylene-imide resin, the cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin, polyorganosiloxane resin, the modifier of these resins or the resins such as mixture of these resins are formed.

Below the Three Represents by three layers of laminated structure of the present invention 10 of forming forms method, that is:

1) a kind of method be laminated structure that outermost layer 11/ insulating course 12 is formed as the first son structure, as the second son structure, two son structures form respectively with innermost layer 14, and with the method for heat lamination first and second sons are constructed and to be laminated to together.

2) a kind of method is that the laminated structure that outermost layer 11/ insulating course 12 is formed is constructed as first son, innermost layer 14 is constructed as second son, two son structures form respectively, and the method with extruding lamination (comprising the co-extrusion pressure lamination) is pressed onto the first and second sub-techonospheres together, when needed, laminated structure stands the processing of heat lamination operation again.

3) a kind of method is with dried laminating method outermost layer 11, insulating course 12 and innermost layer 14 all to be fitted to be laminated to together.Any in these methods all can use.

Below the Three Represents by four layers of laminated structure of the present invention 10 of forming forms method, that is:

1) a kind of method is that the laminated structure that outermost layer 11/ insulating course 12 is formed is constructed as first son, the laminated body that intermediate layer 13/ innermost layer 14 constitutes is constructed as second son, two son structures form respectively, and with the method for heat lamination the first and second son structures are laminated to together.

2) a kind of method is that the laminated structure that outermost layer 11/ insulating course 12 is formed is constructed as first son, the laminated body that a part/innermost layer 14 in intermediate layer 13 is constituted as the second son structure or only with innermost layer 14 as the second son structure, two son structures form respectively, and pushing the method that laminates (comprising the co-extrusion pressure lamination) is laminated to the first and second son structures together by extruding intermediate layer 13, when needed, laminated structure stands the processing of heat lamination operation again.

3) a kind of method is all with dried laminating method outermost layer 11, insulating course 12, intermediate layer 13 and innermost layer 14 to be fitted to be laminated to together.Any in these methods all can use.

Can form the impenetrable film of gas, liquid and ion on the intermediate layer 13 penetrates insulating course 12 and guarantees stable bonding strength to prevent electrolytical constitute.This film can be metallic film (as the aluminium film), or metal oxide film (as aluminium oxide or tin oxide), and these films can pass through (cathode) sputtering method, CVD (Chemical Vapor Deposition) method or physical vapor deposition method or form resin molding such as vinylidene chloride film by coating process.

Embodiment

Laminated structure as the laminated structure 10 of the packaging material for lithium battery of the present invention of above explanation is produced as follows, and makes pouch-type or concavo-convex mold pressing type.Use particularly respectively and estimate as the packaging material of lithium battery.

In the following description, will be by title, title material and the processing method etc. of following breviary symbolic formulation film.

Abbreviation

PET: polyester film; CPET: copolyester film; OPET: oriented polyester film; ON: oriented polyamide (nylon) film; NY: polyamide (nylon) film; P-EP: epoxy protective layer; AL: aluminium foil; COPET: orientation copolyester film; PC: chromium phosphate epithelium; 3C: trivalent chromium epithelium; PZ: zinc phosphate coat; PCa: calcium phosphate epithelium; PUD: polyester-polyurethane ester adhesive; PED: polyethers-urethane adhesives; PAD: unsaturated carboxylic acid graft random polypropylene adhesive; PEAD: unsaturated carboxylic acid graft polyethylene adhesive; TL: heat laminating; DL: dried lamination; EC: resin melt extruded lamination; ANC: intermediary's adhesive coatings; EP: epoxy resin film; FN: phenol resin film; MR: melamine resin film; AC: acrylic resin film; PPA: unsaturated carboxylic acid graft random polypropylene film; PPEA: unsaturated carboxylic acid graft polyethylene film; EAM: ethylene-methyl methacrylate methyl terpolymer film; PH: homo-polypropylene film; PR: random polypropylene film; PP: polypropylene screen; BR: butylene-atactic propene copolymer film; PE: polyethylene film; HD: density polyethylene film with high; LLD: low density polyethylene films; MD: medium density polyethylene film; AD: acid-modification is not wrapped and polyolefin film; PMa: unsaturated carboxylic acid graft polymethylpentene; TPX: polymethylpentene film.More than expression is used for the material name of lamination.

Be in the record of dried lamination, unless otherwise indicated, dried lamination uses polyester-urethane adhesives to carry out lamination.

The content of estimating

Use following various packaging material to make pocket or cup, and carry out following evaluation of physical property.

1. electrolyte resistance characteristic

Simulation is after electrolyte pours into and seal, sample 60 ℃ store 30 days down after, detect between insulating course 12 and the innermost layer 14 or have or not delamination to take place between insulating course 12 and the intermediate layer 13.

2. steam barrier character

Sample stores 30 days in the environment of 40 ℃ and 90%RH after, the moisture of test samples.Moisture must be below the 300ppm.

3. the anti-stripping of innermost layer sealing intensity changes

Sample stores 30 days in-40 ℃ of environment, place the peel strength of testing innermost layer in 1 hour again down in indoor temperature (23 ℃) then.Peel strength must be more than the 9.8N (1kgf) on the 15mm width.

4. anti-electrode nipple short-circuit capacity

The electrode nipple that is made of tab 16 and electrode 3 is sandwiched among the innermost layer 14, and with innermost layer clamp this electrode nipple that part of when under 190 ℃ and 0.3Mpa pressure, standing the heat-sealing of time spent 3.5s,

(1) confirm in outermost layer 11, can not have any pin hole to form, and outermost layer 11 can not be peeled off with insulating course 12.

(2) check that insulating course 12 necessarily can not contact with electrode nipple 3,16.

5. the mouldability of the occasion of moulding product (cup type)

Use the degree of depth to carry out cold moudling as former and the formpiston of 3.1mm.Gap between former and the formpiston is 1mm.A situation arises for the pin hole of the moulding section when checking 100 moulding.

Simulation electrode liquid is to ethylene carbonate: diethyl carbonate: add 1M phosphorus hexafluoride acid lithium (LiPF in the mixture of dimethyl carbonate=1: 1: 1 (part by weight) ₆) preparation.

Basic heat seal condition: 190 ℃, 0.3Mpa, 3.5s

Pack the embodiment of bag with pouch-type

Pocket form: four limit sealed types

Packaged configuration size: 40mm * 60mm (hermetic unit width: 5mm)

Laminated layer sequence: the order that is not limited to embodiment can suitably change

Formation as the laminated structure of embodiment

In following description to all laminated structures, a left side all is the outside, and the right side all is inboard (lithium battery main body side)

The embodiment of pouch-type packing bag

Embodiment 1

Oriented polyester film that 12 μ m are thick (outermost layer 11) and the 20 μ m thick aluminum foils (insulating course 12) that scribble trivalent chromium epithelium (antiacid film) are by dried lamination, the oriented polyester film that 6 μ m are thick (intermediate layer 13) is laminated on the above-mentioned acidproof epithelium face by dried, the unsaturated carboxylic acid graft atactic propene film (innermost layer 14) that 50 μ m are thick is laminated on the above-mentioned intermediate layer 13 by dried, has obtained the packaging material of embodiment 1.

The packaging material breviary of embodiment 1 is designated as:

Below the OPET12/PUD/AL20/3C/PUD/OPET6/PUD/PPA50, each embodiment also uses the same breviary symbol of this example.Additional numeral is indicated the thickness (μ m) of this layer behind the symbol, symbol // represent the interlayer of coextrusion system film, and symbol+representative mixes.

Embodiment 2

Except outermost layer 11 being changed into the thick oriented nylon of 15 μ m, the thickness of aluminium foil 12 changes 15 μ m into and intermediate layer 13 is changed into beyond the thick homo-polypropylene of 10 μ m, and all the other carry out lamination by embodiment 1 same method.

ON15/PUD/AL15/3C/PH10/PUD/PPA70

Embodiment 3

Except the thickness of insulating course 12 being changed into 25 μ m; be laminated into innermost layer 14 1 sides of insulating course 12 as the acrylic resin film of protective layer 15 by dried lay-up method handle; and as beyond the innermost layer 14, all the other carry out lamination by embodiment 1 same method with the co-extruded films heat laminating of random polypropylene, homo-polypropylene and random polypropylene.

OPET12/PUD/AL25/3C/AC5/PUD/OPET6/PUD/PR5//PH//30//PR10

Embodiment 4

Oriented polyester film and the 15 μ ms thick oriented nylon film thick by dried lamination 12 μ m are bonded together to formation outermost layer 11, the 20 μ m thick aluminum foils that will scribble the antiacid film of trivalent chromium epithelium formation by the dried lamination that uses the polyester-polyurethane ester adhesive are adhered on the above-mentioned oriented polyamide face, to be adhered on the above-mentioned acidproof epithelium as the thick oriented polyester film of 6 μ m in intermediate layer 13 by dried lamination, and will be adhered on the face in intermediate layer 13 as the thick film of unsaturated carboxylic acid graft random polypropylene 60 μ m of innermost layer 14.

OPET12/PUD/ON15/PUD/AL20/3C/PUD/OPET6/PUD/PPA60

Embodiment 5

Except using the thick aluminium foil of 25 μ m instead as insulating course 12, the chromium phosphate film is used as antiacid film and forms beyond the innermost layer 14 of thick 40 μ m, and all the other methods identical with embodiment 4 are carried out lamination.

OPET12/PUD/ON15/PUD/AL25/PC/PUD/OPET6/PUD/PPA40

Embodiment 6

Be used as the innermost layer 14 as antiacid film and the thick PPA film of 50 μ m except using lithoform instead, all the other carry out lamination by embodiment 5 identical methods.

OPET12/PUD/ON15/PUD/AL25/PZ/PUD/OPET6/PUD/PPA50

Embodiment 7

Except calcium phosphate film was used as antiacid film, all the other carried out lamination by embodiment 6 same procedure.

OPET12/PUD/ON15/PUD/AL25/PCa/PUD/OPET6/PUD/PPA50

Embodiment 8

Thereby oriented polyester film and the thick oriented nylon film of 15 μ m lamination 12 μ m are thick by dried lamination form outermost layer 11; by dried lamination 20 μ m thick aluminum foils (scribbling the trivalent chromium film as the acid-resisting epithelium) are laminated on the above-mentioned oriented nylon face; on the surface of innermost layer 14 1 sides of aluminium foil, the thick epoxy resin film of 5 μ m is set as protective layer 15; by dried lamination the thick oriented polyester film of 6 μ m as intermediate layer 13 is laminated on the protective layer 15, and the thick unsaturated carboxylic acid graft random polypropylene of 50 μ m is laminated on the face in above-mentioned intermediate layer 13 as innermost layer by dried lamination.

OPET12/PUD/ON15/PUD/AL25/3C/EP5/PUD/OPET6/PUD/PPA50

Embodiment 9

Except the thick phenol resin of 3 μ m was used as protective layer 15, all the other carried out lamination by embodiment 8 identical methods.

OPET12/PUD/ON15/PUD/AL25/3C/FN3/PUD/OPET6/PUD/PPA50

Embodiment 10

The formation of the battery packaging material laminated structure among the embodiment 10 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 8; except following difference; use polyethers-urethane adhesives that outermost layer 11 and aluminium foil are bonded together, and the thick melamine resin film of 4 μ m is used as protective layer 15.

OPET12/PUD/ON15/PED/AL25/3C/MR4/PUD/OPET6/PUD/PPA50

Embodiment 11

The formation of the battery packaging material laminated structure among the embodiment 11 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 10, and except following difference, the thick polyester resin film of 10 μ m is used as protective layer 15.

OPET12/PUD/ON15/PUD/AL25/3C/AC5/PUD/OPET6/PUD/PPA50

Embodiment 12

The formation of the battery packaging material laminated structure among the embodiment 12 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 8, and except following difference, the thick acrylic resin film of 5 μ m is used as protective layer 15.

OPET12/PUD/ON15/PUD/AL25/3C/AC5/PUD/OPET6/PUD/PPA50

Embodiment 13

The formation of the battery packaging material laminated structure among the embodiment 13 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 8; except following difference; use the dried stack adhesive of polyethers-urethane adhesives, and the thick unsaturated carboxylic acid graft random polypropylene film of 4 μ m is used as protective layer 15 as oriented polyester film and oriented nylon film.

OPET12/PED/ON15/PUD/AL25/3C/PPA4/PUD/OPET6/PUD/PPA50

Embodiment 14

The formation of the battery packaging material laminated structure among the embodiment 14 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 8, and except following difference, the unsaturated carboxylic acid graft polyethylene film that 4 μ m are thick is used as protective layer 15.

OPET12/PUD/ON15/PUD/AL25/3C/PEA4/PUD/OPET6/PUD/PPA50

Embodiment 15

The formation of the battery packaging material laminated structure among the embodiment 15 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 12, except following difference, use the dried stack adhesive of polyethers-urethane resin, and the thick unsaturated carboxylic acid graft polyethylene film of 70 μ m is used as innermost layer 14 as outermost layer 11 and aluminium insulating course 12.

OPET12/PUD/ON15/PED/AL25/3C/AC5/PUD/OPET6/PUD/PEA70

Embodiment 16

The formation of the battery packaging material laminated structure of embodiment 16 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 12, and except following difference, the ethylene-methyl methacrylate methyl terpolymer film that 50 μ m are thick is used as innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/3C/AC5/PUD/OPET6/PUD/EAM50

Embodiment 17

The formation of the battery packaging material laminated structure of embodiment 17 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 12, and except following difference, the homo-polypropylene film that 30 μ m are thick is used as innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/3C/AC3/PUD/OPET6/PUD/PH30

Embodiment 18

The formation of the battery packaging material laminated structure of embodiment 18 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 12, and except following difference, the random polypropylene film that 40 μ m are thick is used as innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/3C/AC3/PUD/OPET6/PUD/PR40

Embodiment 19

The formation of the battery packaging material laminated structure of embodiment 19 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 12, and except following difference, the butylene that 90 μ m are thick-atactic propene copolymer film is used as innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/3C/AC1/PUD/OPET6/PUD/BR90

Embodiment 20

Thereby oriented polyester film and the thick oriented nylon film of 15 μ m 12 μ m are thick by dried lamination are laminated to formation outermost layer 11 together, and the thick aluminium foil of 20 μ m that will scribble the antiacid epithelium of trivalent chromium epithelium formation by dried lamination is laminated on the above-mentioned oriented nylon face.The thick acrylic resin film of 2 μ m as protective layer is laminated on the acid resistance epithelium face of above-mentioned trivalent chromium formation; by using unsaturated carboxylic acid graft random polypropylene on this protective layer as resin of binding property, will be to the acrylic resin diaphragm as the thick random polypropylene film of the 60 μ m heat laminating of innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/3C/AC2/PUD/OPET6/TL＝PAD/PR60

Embodiment 21

The formation of the battery packaging material laminated structure among the embodiment 21 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20; except following difference; by using polyethers-urethane adhesives as adhesive with outermost layer 11 and aluminium insulating course 12 dried laminations; the thick epoxy resin film of 5 μ m is used as protective layer 15; the unsaturated carboxylic acid graft polyethylene is coated onto on 15 of the protective layers as resin of binding property, and the thick ethylene-methyl methacrylate methyl terpolymer film of 50 μ m is used as innermost layer 14.

OPET12/PUD/ON15/PED/AL25/3C/EP5/TL＝PEAD/EAM50

Embodiment 22

The formation of the battery packaging material laminated structure among the embodiment 22 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20; except following difference; the unsaturated carboxylic acid graft random polypropylene film that 5 μ m are thick is used as protective layer 15; and the unsaturated carboxylic acid graft random polypropylene film that 50 μ m are thick is used as innermost layer 14, and is laminated on 15 of the protective layers by direct heat.

OPET12/PUD/ON15/PUD/AL25/3C/PPA5/TL/PPA50

Embodiment 23

The formation of the battery packaging material laminated structure among the embodiment 23 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20; except following difference; zinc phosphate coat is used as the acid-resisting epithelium; the phenol resin film that 2 μ m are thick is used as protective layer 15, and the thick butylene-atactic propene copolymer film of 70 μ m is used as the resin of innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/PZ/FN2/TL＝PAD/BR70

Embodiment 24

The formation of the battery packaging material laminated structure among the embodiment 24 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20; except following difference; zinc phosphate coat is used as the acid-resisting epithelium, and thick mixture (mixing ratio is 5: the 1) film of 6 μ m of epoxy resin and melamine resin L composition is used as protective layer 15.

OPET12/PUD/ON15/PUD/AL25/PZ/EP+MR/TL＝PAD/PPA50

Embodiment 25

The formation of the battery packaging material laminated structure among the embodiment 25 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20; except following difference; by the dried lamination that uses polyethers-urethane adhesives outermost layer 11 and aluminium foil insulating course 12 are laminated to together; the thick acrylic resin film of 4 μ m is used as protective layer 15; formed innermost layer 14 by the thick homo-polypropylene film of 40 μ m and the thick random polypropylene film of 10 μ m are carried out coextrusion, be laminated on 15 of the protective layers by dried lamination homo-polypropylene film.

OPET12/PUD/ON15/PED/AL25/3C/AC4/PUD/OPET6/PUD/PH40//PR10

Embodiment 26

The formation of the battery packaging material laminated structure among the embodiment 26 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20; except following difference; the thick acrylic resin film of 4 μ m is used as protective layer 15; formed innermost layer 14 by the thick homo-polypropylene film of 30 μ m and the thick unsaturated carboxylic acid graft random polypropylene film of 25 μ m are carried out coextrusion, above-mentioned homo-polypropylene film has been laminated on 15 of the above-mentioned protective layers by dried lamination.

OPET12/PUD/ON15/PUD/AL25/3C/AC4/PUD/OPET6/PUD/PH30//PPA25

Embodiment 27

The formation of the battery packaging material laminated structure among the embodiment 27 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20; except following difference; the thick acrylic resin film of 4 μ m is used as protective layer 15; by being carried out coextrusion, the thick homo-polypropylene film of 40 μ m and the thick random polypropylene film of 10 μ m formed innermost layer 14; and by using the heat laminating of unsaturated carboxylic acid graft random polypropylene adhesive, above-mentioned homo-polypropylene film is laminated on 15 of the above-mentioned protective layers.

OPET12/PUD/ON15/PUD/AL25/3C/AC4/TL＝PAD/PH40//PR10

Embodiment 28

The formation of the battery packaging material laminated structure among the embodiment 28 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 20, except following difference, form zinc phosphate coat as the acid-resisting epithelium, by being carried out coextrusion, the thick homo-polypropylene film of the thick random polypropylene film of 5 μ m and 20 μ m and the thick atactic propene film of 10 μ m formed innermost layer 14, and by using the unsaturated carboxylic acid graft random polypropylene as the adhesive heat laminating, the random polypropylene face heat laminating that above-mentioned 5 μ m are thick is to above-mentioned trbasic zinc phosphate acid resistance epithelium face.

OPET12/PUD/ON15/PUD/AL25/PZ/PPA6/TL＝PAD/PR5//PH30//PR10

Embodiment 29

The formation of the battery packaging material laminated structure among the embodiment 29 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 28; except following difference; the unsaturated carboxylic acid graft polyethylene film that 3 μ m are thick is used as protective layer 15; formed innermost layer 14 by the thick low density polyethylene films of 15 μ m and the thick ethylene-methyl methacrylate methyl terpolymer film of 50 μ m are carried out coextrusion, the low density polyethylene films face of above-mentioned co-extruded films as stromatolith.

OPET12/PUD/ON15/PUD/AL25/PZ/PEA3/TL＝PAD/LD15//EAM50

Embodiment 30

Form outermost layer 11 by using polyethers-urethane adhesives oriented polyester film that 12 μ m are thick and the thick oriented nylon film of 15 μ m to carry out dried lamination; the thick aluminium foil of 25 μ m is coated with the trivalent chromium epithelium as the acid-resisting epithelium; and this aluminium foil is laminated on the outermost oriented nylon face by dried lamination; on the surface of above-mentioned trivalent chromium film, form the thick phenol resin film of 4 μ m as protective layer 15; to be laminated to as the thick density polyethylene film with high of 10 μ m in intermediate layer 13 on the phenol resin face as this protective layer by dried lamination, and be laminated on the density polyethylene film with high by the heat laminating ethylene-methyl methacrylate methyl terpolymer film that 70 μ m are thick.

OPET12/PED/ON15/PUD/AL25/3C/FN4/TL＝PEAD/HD10/TL/EAM70

Embodiment 31

Adopt with embodiment 30 similar methods and carry out lamination; but different is; as outermost layer 11; use polyester-urethane adhesives to be laminated to together adhesive as the thick oriented polyester film of 12 μ m and the thick oriented nylon film of 15 μ m; the thick acrylic resin film of 4 μ m is used as protective layer 15; on above-mentioned acid resistance epithelium face, the homo-polypropylene film that 15 μ m are thick is used as the thick unsaturated carboxylic acid graft random polypropylene film of intermediate layer 13,50 μ m and is used as innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/3C/AC4/TL＝PAD/PH15/TL/PPA50

Embodiment 32

The formation of the battery packaging material laminated structure among the embodiment 32 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 31; but different is; the thick acrylic resin film of 3 μ m is used as protective layer 15; the homo-polypropylene film that 6 μ m are thick is used as intermediate layer 13, and the thick unsaturated carboxylic acid graft random polypropylene film of 50 μ m is used as innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/PZ/AC3/TL＝PAD/PH6/TL＝PAD/PA50

Embodiment 33

By using the dried lamination of polyethers-urethane adhesives; thereby thick oriented polyester film of 12 μ m and the thick oriented nylon film of 15 μ m are laminated into form outermost layer 11 together; the thick aluminium foil of 25 μ m that scribbles trivalent chromium epithelium (as the acid-resisting epithelium) by dried lamination is laminated on the oriented nylon face of outermost layer 11; on above-mentioned trivalent chromium acid resistance epithelium face; form the thick acrylic resin film of 4 μ m as protective layer 15; to be laminated to as the thick oriented polyester film of 6 μ m in intermediate layer 13 on the acrylic resin face as above-mentioned protective layer 15 by dried lamination; formed innermost layer 14 by the thick random polypropylene film of 40 μ m and the thick butylene-atactic propene copolymer film of 20 μ m are carried out coextrusion, and the random polypropylene face of innermost layer is laminated on the intermediate layer 13.

OPET12/PED/ON15/PUD/AL25/3C/AC4/PUD/OPET6/PUD/PR40//BR20

Embodiment 34

The formation of the battery packaging material laminated structure among the embodiment 34 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 33, but following difference is arranged, by using the dried lamination of polyester-urethane adhesives, thereby oriented polyester film that 12 μ m are thick and the thick oriented nylon film of 15 μ m are laminated to and form outermost layer 11 together, random polypropylene film and homo-polypropylene and butylene-atactic propene copolymer film are carried out the film that coextrusion forms be used as innermost layer 14, and the above-mentioned random polypropylene face of innermost layer 14 is laminated on the intermediate layer 13.

OPET12/PUD/ON15/PUD/AL25/3C/AC4/PUD/OPET6/PUD/PR10//PH20//BR20

Embodiment 35

The formation of the battery packaging material laminated structure among the embodiment 35 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 34; but following difference is arranged; the thick epoxy resin of 5 μ m is used as protective layer 15; by the thick low density polyethylene films of 15 μ m and the thick ethylene-methyl methacrylate methyl esters film of 50 μ m being carried out film that coextrusion forms as innermost layer 14, and above-mentioned low density polyethylene films face is as the lamination side.

OPET12/PUD/ON15/PUD/AL25/3C/EP5/PUD/OPET6/PUD/LD15//EAM50

Embodiment 36

By using the dried lamination of polyethers-urethane adhesives; oriented polyester film that 12 μ m are thick and the thick oriented nylon film of 15 μ m are laminated to and form outermost layer 11 together; scribble the thick aluminium foil of 25 μ m of trivalent chromium epithelium (as the acid-resisting epithelium) by on the dried oriented nylon face that is laminated to outermost layer 11, form the thick acrylic resin film of 2 μ m on the above-mentioned trivalent chromium acid resistance epithelium face as protective layer 15.By the dried lamination low density polyethylene films that 20 μ m are thick (as first intermediate layer), the random polypropylene film (as innermost layer 14) that oriented polyester film that 6 μ m are thick (as second intermediate layer) and 50 μ m are thick is laminated on the protective layer 15 in order.

OPET12/PED/ON15/PUD/AL25/3C/AC2/PUD/LD20/PUD/OPET6/PUD/PR50

Embodiment 37

Be laminated to by dried lamination oriented polyester film that 12 μ m are thick and the thick oriented nylon film of 15 μ m and form outermost layer 11 together; the thick aluminium foil of 25 μ m that scribbles trivalent chromium epithelium (as antiacid epithelium) by dried lamination is laminated on the above-mentioned oriented nylon face; form the thick polyester film of 3 μ m on the zinc phosphate coat face as protective layer 15; by using the unsaturated carboxylic acid graft random polypropylene adhesive random polypropylene film (as the second intermediate layer 13b) that 15 μ m are thick to be laminated on 15 of the protective layers; by using the unsaturated carboxylic acid graft random polypropylene adhesive oriented polyester film (as the first intermediate layer 13a) that 6 μ m are thick to be laminated on the protective layer 15; be laminated on the second intermediate layer 13b by the heat laminating oriented polyester film that 6 μ m are thick (as the first intermediate layer 13a and scribble polyester-urethane adhesives as the anchoring coating), unsaturated carboxylic acid graft random polypropylene film (as innermost layer 14) 50 μ m are thick by dried lamination is laminated on the first intermediate layer 13a.

OPET12/PUD/ON15/PUD/AL25/PZ/PET3/TL＝PAD/PR15/ANC＝PUD/OPET6/PUD/PPA50

Embodiment 38

The formation of the battery packaging material laminated structure among the embodiment 38 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 37; except following difference; the thick polyester resin film of 3 μ m is used as protective layer 15; the random polypropylene film that 10 μ m are thick is used as the second intermediate layer 13b; formed innermost layer 14 by the thick homo-polypropylene film of 30 μ m and the thick unsaturated carboxylic acid graft random polypropylene film of 25 μ m are carried out coextrusion, and be laminated on the first intermediate layer 13a as stromatolith by the dried lamination above-mentioned homo-polypropylene face that 30 μ m are thick.

OPET12/PUD/ON15/PUD/AL25/PZ/PET3/TL＝PAD/PR10/ANC＝PUD/OPET6/PUD/PH30//PPA25

Embodiment 39

The formation of the battery packaging material laminated structure among the embodiment 39 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 38; except following difference; the thick acrylic resin film of 3 μ m is used as protective layer 15; by to the thick random polypropylene film of 10 μ m; butylene-atactic propene copolymer film that homo-polypropylene film that 20 μ m are thick and 20 μ m are thick carries out coextrusion and has formed innermost layer 14, and the thick random polypropylene face of 10 μ m is adhered on the first intermediate layer 13a as stromatolith.

OPET12/PUD/ON15/PUD/AL25/PZ/AC3/IL＝PAD/PR10/ANC＝PUD/OPET6/PUD/PR10//PH20//BR20

Embodiment 40

Thereby oriented polyester film and the thick oriented nylon film of 15 μ m 12 μ m are thick by dried lamination are laminated to formation outermost layer 11 together; the thick aluminium foil of 25 μ m that will scribble trivalent chromium epithelium (as antiacid epithelium) by dried lamination is laminated on the oriented nylon film; form the thick acrylic resin film of 4 μ m on the acidproof epithelium of above-mentioned trivalent chromium as protective layer 15; by to the thick random polypropylene film of 5 μ m; homo-polypropylene film that 30 μ m are thick and the thick random polypropylene film of 5 μ m carry out coextrusion and have formed intermediate layer 13; heat laminating by using unsaturated carboxylic acid graft random polypropylene adhesive is laminated to the random polypropylene film in above-mentioned intermediate layer 13 on the above-mentioned protective layer 15, will be laminated on the intermediate layer 13 as the thick unsaturated carboxylic acid graft random polypropylene of the 20 μ m film of innermost layer 14 by heat laminating and obtain laminated body.

OPET12/PED/ON15/PUD/AL25/3C/ acrylic resin 4/IL=PAD/PR5//PH30//PR5/TL=PPA50

Embodiment 41

The formation of the battery packaging material laminated structure among the embodiment 41 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 40; except following difference; zinc phosphate coat is used as antiacid epithelium; the thick polyester film of 5 μ m is used as protective layer 15; by to the thick low density polyethylene films of 5 μ m; density polyethylene film with high that 30 μ m are thick and the thick low density polyethylene films of 5 μ m carry out coextrusion and have formed intermediate layer 13; by dried lamination above-mentioned intermediate layer 13 is laminated on the above-mentioned protective layer 15, and the thick ethylene-methyl methacrylate methyl terpolymer film of 20 μ m is used as innermost layer 14.

OPET12/PUD/ON15/PUD/AL25/PZ/PET5/PUD/LD5//HD30//LD5/TL/EAM20

The performance evaluation of pocket type packaging bag body

Produced the packing bag by the battery packaging material laminated structure in the processing and implementation example 1 to 41.Carry out every evaluation result for the foregoing description, as described below, the performance characteristics of all packing bags is all satisfactory.

1. electrolyte resistance characteristic: the lamination delamination do not occur

2. steam cuts off property: below the 300ppm

3. (40 ℃ keep down) more than innermost layer sealing intensity: the 9.8N/15mm

Above 9.8N/15mm (120 ℃ keep down)

4. prevent the electrode nipple short-circuit capacity

The lamination delamination does not appear in outermost layer and corresponding insulating course.

In arbitrary outermost layer, do not form pin hole.

Arbitrary insulating course does not contact with electrode nipple.

The embodiment of the concavo-convex mold pressing battery packages of cup type

Cup-shaped: the rectangle slot type container that flange is arranged

Overall dimension: 42mm * 58mm * degree of depth 3.1mm (hermetic unit width: 5mm)

But compression molding portion size: 30mm * 45mm * degree of depth 3.1mm (sidewall draft angles: 5 °)

The coefficient of kinetic friction μ of innermost layer is documented in [] at end.

Formation as the laminated body of embodiment

In following description to laminated structure, identical with above-mentioned pouch-type, all be that a left side is the outside, the right side is inboard (lithium battery main body side).

The embodiment of the concavo-convex mold pressing packing of cup type

Embodiment 1

Orientation copolyester film that dried lamination by using polyester-urethane adhesives is thick with 16 μ m and the thick oriented nylon film of 15 μ m are laminated to and form outermost layer 11 together, the above-mentioned trivalent chromium epithelium face that will scribble 50 μ m thick aluminum foils of trivalent chromium epithelium by dried lamination is laminated to (the trivalent chromium film is adjacent with the oriented polyamide film) on the oriented nylon face, be laminated on the above-mentioned trivalent chromium epithelium face by the dried lamination orientation copolyester film that 16 μ m are thick, and will be laminated to as the thick unsaturated carboxylic acid graft random polypropylene of the 30 μ m film of innermost layer 14 on the orientation copolyester film by dried lamination, and press the dried lamination of said sequence and make laminated body.

OPET16/PUD/ON15/PUD/AL(#1)50/3C/PUD/OPET16/PUD/PPA30[0.29]

Attention: AL (#1) representative contains 1.0% iron, and 0.10% silicon and 0.01% manganese are as the aluminium foil of micro constitutent

Embodiment 2

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the thick aluminium foil that scribbles the trivalent chromium epithelium of 50 μ m, to be laminated into as the thick homo-polypropylene of 10 μ m in intermediate layer 13 on the above-mentioned trivalent chromium epithelium face of aluminium foil by dried lamination, and will be laminated on the intermediate layer 13 as the thick unsaturated carboxylic acid graft random polypropylene of the 30 μ m film of innermost layer 14 by dried lamination, make laminated body according to the dried lamination of said sequence.

OPET16/PUD/AL(#1)50/3C/PUD/PH10/PUD/PPA30[0.25]

Embodiment 3

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils that scribble the trivalent chromium epithelium, and will be laminated to as the thick unsaturated carboxylic acid graft random polypropylene of the 30 μ m film of innermost layer 14 on the above-mentioned trivalent chromium epithelium face of aluminium foil, and carry out dried lamination according to said sequence and make laminated body.

ON25/PUD/AL(#1)50/3C/PUD/PUD/PPA30[0.28]

Embodiment 4

The formation of the battery packaging material laminated structure among the embodiment 4 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 3, except following difference, uses the thick aluminium foil of 40 μ m.

ON25/PUD/AL(#1)40/3C/PUD/PH10/PUD/PPA30[0.2]

Embodiment 5

The formation of the battery packaging material laminated structure among the embodiment 5 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 3, except following difference, uses the thick aluminium foil of 80 μ m.

ON25/PUD/AL(#1)80/3C/PUD/PPA30[0.2]

Embodiment 6

Orientation copolyester film 16 μ m are thick by dried lamination is laminated to together as outermost layer 11 and 40 μ m thick aluminum foils (scribbling the thick trivalent chromium epithelium of 2 μ m); on the above-mentioned trivalent chromium epithelium face of aluminium foil, form the thick acrylic resin film of 2 μ m as protective layer 15; be laminated on the protective layer 15 by the heat laminating random polypropylene film (as innermost layer 14) that 30 μ m are thick that uses the unsaturated carboxylic acid graft polyethylene adhesive, obtain laminated body.

The aluminium foil AL (#2) that uses contains 1.2% iron, 0.15% silicon and the 0.002% manganese aluminium foil as micro constitutent.

ON25/PUD/AL(#2)40/3C/AC2/TL＝PAD/PR30[0.2]

Embodiment 7

The formation of the battery packaging material laminated structure among the embodiment 7 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 6; except following difference, the trivalent chromium film that 1 μ m is thick is used as protective layer 15 and uses the 40 μ m thick aluminum foils that are described as AL (#3).

The aluminium foil AL (#3) that uses contains 1.5% iron, 0.09% silicon and the 0.5% manganese aluminium foil as micro constitutent.

ON25/PUD/AL(#3)40/3C/AC2/TL＝PAD/PR30[0.2]

Embodiment 8

The formation of the battery packaging material laminated structure among the embodiment 8 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 7, except following difference, the aluminium foil AL (#2) that uses use instead 40 μ m thick contain 1.5% iron, 0.15% silicon and 0.5% manganese are as the aluminium foil AL (#4) of micro constitutent.

ON25/PUD/AL(#4)40/3C/AC2/TL＝PAD/PR30[0.2]

Embodiment 9

The formation of the battery packaging material laminated structure among the embodiment 9 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 7, except following difference, the aluminium foil AL (#2) of use use instead 40 μ m thick contain 0.8% iron, 0.1% silicon and 0.01% manganese aluminium foil AL (#5) as micro constitutent.

ON25/PUD/AL(#5)40/3C/AC2/TL＝PAD/PR30[0.2]

Embodiment 10

The formation of the battery packaging material laminated structure among the embodiment 10 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 7, except following difference, the aluminium foil AL (#2) of use use instead 40 μ m thick contain 0.5% iron, 0.2% silicon and 1.1% manganese aluminium foil AL (#6) as micro constitutent.

ON25/PUD/AL(#6)40/3C/AC2/TL＝PAD/PR30[0.2]

Embodiment 11

The formation of the battery packaging material laminated structure among the embodiment 11 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 7, except following difference, the aluminium foil AL (#2) of use use instead 40 μ m thick contain 6.0% iron, 1.1% silicon and 0.1% manganese aluminium foil AL (#7) as micro constitutent.

ON25/PUD/AL(#7)40/3C/AC2/TL＝PAD/PR30[0.13]

Embodiment 12

The formation of the battery packaging material laminated structure among the embodiment 12 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 7, and different is to use the thick aluminium foil of 50 μ m.

ON25/PUD/AL(#8)50/3C/AC2/TL＝PAD/PR30[0.2]

Embodiment 13

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils that scribble the thick trivalent chromium epithelium of 2 μ m (as antiacid epithelium), will be laminated to as the thick random polypropylene film of 40 μ m of innermost layer 14 by dried lamination on the acidproof epithelium face of above-mentioned trivalent chromium of aluminium foil and obtain laminated body.

ON25/PUD/AL(#3)50/PC/PUD/PR40[0.2]

Embodiment 14

The formation of the battery packaging material laminated structure among the embodiment 14 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that zinc phosphate coat is used as antiacid epithelium.

ON25/PUD/AL(#3)50/PZ/PUD/PR40[0.2]

Embodiment 15

The formation of the battery packaging material laminated structure among the embodiment 15 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that the calcium phosphate epithelium is used as antiacid epithelium.

ON25/PUD/AL(#3)50/PCa/PUD/PR40[0.2]

Embodiment 16

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils (AL (#3)) that scribble 2 μ m trivalent chromium epitheliums (as antiacid epithelium); on the above-mentioned trivalent chromium epithelium face of aluminium foil, form the thick epoxy resin film of 5 μ m, will be laminated on the protective layer 15 as the thick random polypropylene film of 30 μ m of innermost layer 14 by dried lamination and obtain laminated body as protective layer 15.

The aluminium foil AL (#3) that uses as micro constitutent, contains iron 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/EP5/PUD/PR30[0.2]

Embodiment 17

The formation of the battery packaging material laminated structure among the embodiment 17 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that the phenol resin film that 3 μ m are thick is used as protective layer 15.

ON25/PUD/AL(#3)50/3C/FN3/PUD/PR30[0.2]

Embodiment 18

The formation of the battery packaging material laminated structure among the embodiment 18 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that the melamine resin film that 4 μ m are thick is used as protective layer 15.

ON25/PUD/AL(#3)50/3C/MR4/PUD/PR30[0.2]

Embodiment 19

The formation of the battery packaging material laminated structure among the embodiment 19 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that the thick polyester film of 10 μ m is used as protective layer 15.

ON25/PUD/AL(#3)50/3C/PET10/PUD/PR30[0.2]

Embodiment 20

The formation of the battery packaging material laminated structure among the embodiment 20 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that the thick acrylic resin film of 5 μ m is used as protective layer 15.

ON25/PUD/AL(#3)50/3C/AC5/PUD/PR30[0.2]

Embodiment 21

The formation of the battery packaging material laminated structure among the embodiment 21 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that the thick unsaturated carboxylic acid graft random polypropylene of 4 μ m resin molding is used as protective layer 15.

ON25/PUD/AL(#3)50/3C/PPA4/PUD/PPA30[0.2]

Embodiment 22

The formation of the battery packaging material laminated structure among the embodiment 22 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 13, and different is that the random polyethylene film of unsaturated carboxylic acid graft that 4 μ m are thick is used as protective layer 15.

ON25/PUD/AL(#3)50/3C/PEA4/PUD/PR30[0.2]

Embodiment 23

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils (AL (#3)) that scribble 2 μ m trivalent chromium epitheliums (as antiacid epithelium); on the above-mentioned trivalent chromium epithelium face of aluminium foil, form the thick acrylic resin film of 5 μ m as protective layer 15; to be laminated on the protective layer 15 as the thick copolyester film of 16 μ m in intermediate layer 13 by dried lamination, and will be laminated on this intermediate layer 13 as the thick unsaturated carboxylic acid graft random polypropylene of the 40 μ m film of innermost layer 14 by dried lamination and obtain laminated body.

Used aluminium foil AL (#3), as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/AC5/PUD/COPET16/PUD/PPA40[0.2]

Embodiment 24

The formation of the battery packaging material laminated structure among the embodiment 24 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 23, except following difference, the unsaturated carboxylic acid graft polyethylene film that 30 μ m are thick is used as innermost layer 14 and obtains laminated body.

ON25/PUD/AL(#3)50/3C/AC5/PUD/COPET16/PUD/PEA30[0.25]

Embodiment 25

The formation of the battery packaging material laminated structure among the embodiment 25 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 23, except following difference, the ethylene-methyl methacrylate methyl terpolymer film that 50 μ m are thick is used as innermost layer 14 and obtains laminated body.

ON25/PUD/AL(#3)50/3C/AC5/PUD/COPET16/PUD/EAM50[0.3]

Embodiment 26

Be laminated on the thick acrylic resin film of 2 μ m (as protective layer 15) by the resin melt extruded lamination low density polyethylene films that 10 μ m are thick (as the second intermediate layer 13b); the 50 μ m thick aluminum foils (AL (#3)) that will scribble trivalent chromium epithelium (as antiacid epithelium) by dried lamination are laminated on the protective layer 15; on the above-mentioned acid resistance epithelium face of aluminium foil; formation is as 2 μ m acrylic resin film of protective layer 15; and dried lamination forms the intermediate laminate body as the low density polyethylene films of the second intermediate layer 13b on 15 of this protective layers; in addition; on the thick oriented polyester film of 16 μ m, form polyester-urea alkanes adhesive intermediary (anchoring) coating as intermediate layer 13a; and with this intermediary's aspect heat laminating; on the 13a of this first intermediate layer, the thick atactic propene film as innermost layer 14 of dried lamination 50 μ m makes laminated body.

The aluminium foil AL (#3) that uses, as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/AC2/PUD/LD10/ANC＝PUD/COPET16/PUD/PR50[0.4]

Embodiment 27

The formation of the battery packaging material laminated structure among the embodiment 27 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 23; different is, the thick acrylic resin film of 3 μ m is used as protective layer 15 and the thick homo-polypropylene film of 30 μ m and is used as innermost layer 14 and makes laminated body.

ON25/PUD/AL(#3)50/3C/AC3/PUD/COPET16/PUD/PH30[0.13]

Embodiment 28

The formation of the battery packaging material laminated structure among the embodiment 28 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 27, and except following difference, the thick random polypropylene film of 40 μ m is used as innermost layer 14 and makes laminated body.

ON25/PUD/AL(#3)50/3C/AC3/PUD/COPET16/PUD/PR40[0.1]

Embodiment 29

The formation of the battery packaging material laminated structure among the embodiment 29 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 27, except following difference, the butylene that 90 μ m are thick-atactic propene copolymer film is used as innermost layer 14 and makes laminated body.

ON25/PUD/AL(#3)50/3C/AC1/PUD/COPET16/PUD/BR90[0.5]

Embodiment 30

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 40 μ m thick aluminum foils (AL (#3)) that scribble the trivalent chromium film; on the above-mentioned trivalent chromium film of aluminium foil, form the thick acrylic resin film of 2 μ m, obtain laminated body by using the unsaturated carboxylic acid graft random polypropylene will be laminated to as the thick random polypropylene film of 30 μ m of innermost layer 14 on 15 of the protective layers as the heat laminating of heat adhesive as protective layer 15.

The aluminium foil AL (#3) that uses, as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/AC2/TL＝PAD/PR30[0.2]

Embodiment 31

The formation of the battery packaging material laminated structure among the embodiment 31 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 30; except following difference; the thick epoxy resin film of 5 μ m is used as the thick ethylene-methyl methacrylate methyl terpolymer film of protective layer 15,50 μ m and is used as the heat adhesive resin that innermost layer 14 and unsaturated carboxylic acid graft polyethylene be used as heat laminating and obtains laminated body.

ON25/PUD/AL(#3)50/3C/EP5/TL＝PEAD/EAM50[0.2]

Embodiment 32

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 40 μ m thick aluminum foils (AL (#3)) that scribble the trivalent chromium film; on the above-mentioned trivalent chromium film of aluminium foil, form the thick phenol resin film of 4 μ m as protective layer 15; by using the unsaturated carboxylic acid graft random polypropylene will be laminated to as the thick density polyethylene film with high of 10 μ m in intermediate layer 13 on 15 of this protective layers, and will be laminated on the intermediate layer 13 as the thick ethylene-methyl methacrylate methyl terpolymer of the 70 μ m film of innermost layer 14 by heat laminating and obtain laminated body as the heat laminating of heat adhesive.

The aluminium foil AL (#3) that uses, as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/FN4/TL＝PEAD/HD10/TL＝PEAD/EAM70[0.1]

Embodiment 33

The formation of the battery packaging material laminated structure among the embodiment 33 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 32, except following difference, and the thick phenol resin acrylic resin of 4 μ m ^*Film is used as protective layer 15; the homo-polypropylene film of 15 μ m is used as intermediate layer 13; by using the unsaturated carboxylic acid graft polyethylene as the heat adhesive resin protective layer 15 and intermediate layer 13 heat laminatings to be arrived together, the unsaturated carboxylic acid graft random polypropylene film that 30 μ m are thick is used as innermost layer 14.

ON25/PUD/AL(#3)50/3C/FN4/TL＝PEAD/PH10/TL＝PEAD/PPA30[0.2]

Embodiment 34

The formation of the battery packaging material laminated structure among the embodiment 34 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 30; except following difference; the thick unsaturated carboxylic acid graft random polypropylene of 5 μ m film is used as protective layer 15; the unsaturated carboxylic acid graft random polypropylene film that 30 μ m are thick is used as innermost layer 14, protective layer 15 and innermost layer 14 is laminated to together as the heat laminating binder resin by using the unsaturated carboxylic acid graft polyethylene.

ON25/PUD/AL(#3)50/3C/PPA5/TL＝PEAD/PPA30[0.5]

Embodiment 35

The formation of the battery packaging material laminated structure among the embodiment 35 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 30; except following difference; lithoform is used as antiacid film; the phenol resin film that 2 μ m are thick is used as protective layer 15, and the thick butylene-atactic propene copolymer film of 70 μ m is used as innermost layer 14.

ON25/PUD/AL(#3)50/PZ/FN2/TL＝PAD/BR70[0.6]

Embodiment 36

Be laminated on the thick polyester film of 3 μ m (as protective layer 15) by the resin melt extruded low density polyethylene films that 10 μ m are thick (as the second intermediate layer 13b); the 50 μ m thick aluminum foils (AL (#3)) that will scribble lithoform (as antiacid film) by dried lamination are laminated on the protective layer 15; on the above-mentioned acidproof face of aluminium foil; form the thick polyester resin film of 3 μ m as protective layer; with the unsaturated carboxylic acid graft random polypropylene is that thermal adhesive resin will be as the thick random polypropylene film of the 10 μ m heat laminating of the 2nd intermediate layer 13b to 15 of this protective layers; in addition; on 6 μ m oriented polyester films as the 1st intermediate layer 13a; form polyester-urea alkane adhesive intermediary coating; simultaneously with this intermediary's coating heat laminating; on the 1st intermediate layer 13a, dried lamination obtains laminated body as the thick unsaturated carboxylic acid graft random polypropylene film of 50 μ m of innermost layer 14.

The aluminium foil AL (#3) that uses, as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/PZ/PET3/TL＝PAD/PR10/ANC＝PUD/COPET16/PUD/PPA50[0.2]

Embodiment 37

The formation of the battery packaging material laminated structure among the embodiment 37 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 30; except following difference; lithoform is used as antiacid film; the blending resin film of epoxy resin that 6 μ m are thick and melamine resin (blending ratio: 5: 1) is used as protective layer 15, and the thick unsaturated carboxylic acid graft random polypropylene film of 50 μ m is used as innermost layer 14.

ON25/PUD/AL(#3)50/PZ/EP+MR/TL＝PAD/PPA50[0.15]

Embodiment 38

The formation of the battery packaging material laminated structure among the embodiment 38 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 33; except following difference; lithoform is used as antiacid film; the thick acrylic resin film of 3 μ m is used as protective layer 15; the homo-polypropylene film that 10 μ m are thick is used as intermediate layer 13, and the thick unsaturated carboxylic acid graft random polypropylene film of 50 μ m is used as innermost layer 14.

ON25/PUD/AL(#3)50/PZ/AC3/TL＝PAD/PH10/TL/PPA50[0.3]

Embodiment 39

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils (AL (#3)) that scribble 2 μ m trivalent chromium films (as antiacid film); on the above-mentioned trivalent chromium face of aluminium foil, form the thick acrylic resin film of 5 μ m as protective layer 15; to be laminated on this protective layer 15 as the thick copolyester film of 16 μ m in intermediate layer 13 by dried lamination; random polypropylene film and 30 μ ms thick homo-polypropylene film and the 10 μ ms thick random polypropylene film (as innermost layer 14) thick to 5 μ m carry out coextrusion system film, and make the thick atactic propene face of 5 μ m of aforementioned intermediate layer 13 and aforementioned innermost layer 14 carry out dried lamination acquisition laminated body.

The aluminium foil AL (#3) that uses, as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/AC5/PUD/COPET16/PUD/PR5//PH30//PR10[0.2]

Embodiment 40

The formation of the battery packaging material laminated structure among the embodiment 40 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 30; except following difference; the thick acrylic resin film of 4 μ m is used as protective layer 15; random polypropylene film and the 20 μ ms thick butylene-atactic propene copolymer film co-extruded films thick to 40 μ m are used as innermost layer 14, and this random polypropylene film is used as stromatolith.

ON25/PUD/AL(#3)50/3C/AC4/PUD/COPET16/PUD/PR40//BR20[0.18]

Embodiment 41

The formation of the battery packaging material laminated structure among the embodiment 41 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 30; except following difference; random polypropylene film and 20 μ ms thick homo-polypropylene film and the 20 μ ms thick co-extruded films that butylene-atactic propene copolymer film form thick by 10 μ m are used as innermost layer 14, and this random polypropylene face is laminated on the protective layer 15.

ON25/PUD/AL(#3)50/3C/AC4/PUD/COPET16/PUD/PR10//PH20//BR20[0.5]

Embodiment 42

The formation of the battery packaging material laminated structure among the embodiment 42 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 30; except following difference; the thick epoxy resin film of 5 μ m is used as protective layer 15; the co-extruded films of being made up of thick low density polyethylene films of 15 μ m and the thick ethylene-methyl methacrylate methyl terpolymer film of 50 μ m is used as innermost layer 14, and this low density polyethylene films face is laminated on the protective layer 15 as stromatolith.

ON25/PUD/AL(#3)50/3C/EP5/PUD/COPET16/LD15//EAM50[0.3]

Embodiment 43

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils (AL (#3)) that scribble trivalent chromium film (as antiacid film); on the acidproof chromium film of the above-mentioned trivalent of aluminium foil, form the thick acrylic resin film of 4 μ m as protective layer 15; homo-polypropylene film and the 10 μ ms thick random polypropylene film thick to 40 μ m carry out coextrusion system film (being used as innermost layer 14), by dried lamination the homo-polypropylene face of the face of protective layer 15 and above-mentioned innermost layer 14 are laminated to and obtain laminated body together.

The aluminium foil AL (#3) that uses, as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/AC4/PUD/PH40//PR10[0.22]

Embodiment 44

The formation of the battery packaging material laminated structure among the embodiment 44 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 43; except following difference; the co-extruded films of being made up of thick homo-polypropylene film of 30 μ m and the thick unsaturated carboxylic acid graft random polypropylene film of 25 μ m is used as innermost layer 14, and the above-mentioned homo-polypropylene face of innermost layer 14 is laminated into protective layer 15 as stromatolith.

ON25/PUD/AL(#3)50/3C/AC4/PUD/PH3O//PPA25[0.3]

Embodiment 45

The formation of the battery packaging material laminated structure among the embodiment 45 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 43; except following difference; the co-extruded films of being made up of thick homo-polypropylene film of 30 μ m and the thick random polypropylene film of 10 μ m is used as innermost layer 14, the homo-polypropylene face of innermost layer 14 is laminated on 15 of the protective layers as the heat laminating of adhesive by using the unsaturated carboxylic acid graft random polypropylene.

ON25/PUD/AL(#3)50/3C/AC4/TL＝PAD/PH40//PR10[0.2]

Embodiment 46

The formation of the battery packaging material laminated structure among the embodiment 46 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 43; except following difference; the unsaturated carboxylic acid graft random polypropylene film that 6 μ m are thick is used as protective layer 15; by the thick random polypropylene film of 5 μ m; the co-extruded films that the random polypropylene film that homo-polypropylene film that 30 μ m are thick and 10 μ m are thick is formed is used as innermost layer 14, and is laminated to together as stromatolith by the heat laminating random polypropylene face that this 5 μ m of protective layer 15 and innermost layer 14 is thick.

ON25/PUD/AL(#3)50/PZ/PPA6/TL＝PUD/PR5//PH30//PR10[0.2]

Embodiment 47

The formation of the battery packaging material laminated structure among the embodiment 47 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 43; except following difference; the unsaturated carboxylic acid graft polyethylene film that 3 μ m are thick is used as protective layer 15; the co-extruded films of being made up of thick low density polyethylene films of 15 μ m and the thick ethylene-methyl methacrylate methyl terpolymer film of 50 μ m is used as innermost layer 14, is laminated to together as stromatolith by the low density polyethylene films of heat laminating with protective layer 15 and innermost layer 14.

ON25/PUD/AL(#3)50/PZ/PEA3/TL＝PUD/LD15//EAM50[0.5]

Embodiment 48

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils (AL (#3)) that scribble lithoform (as antiacid film); on the acidproof film of above-mentioned trbasic zinc phosphate of aluminium foil, form the thick polyester film of 3 μ m as protective layer 15; to be laminated on the protective layer 15 as the thick random polypropylene film of 10 μ m of the second intermediate layer 13b by the heat laminating that uses unsaturated carboxylic acid graft random polypropylene adhesive; in addition; as the polyester-urethane adhesives that applies on the thick oriented polyester film of 6 μ m of the first intermediate layer 13a as the anchoring coating; the co-extruded films of being made up of thick homo-polypropylene film of 30 μ m and the thick unsaturated carboxylic acid graft random polypropylene film of 25 μ m is used as innermost layer 14, by dried lamination above-mentioned intermediate layer 13a (with the polyester-urea alkane adhesive on it) and innermost layer 14 is laminated to then and obtains laminated body together.

ON25/PUD/AL(#3)50/PZ/PET3/IL＝PUD/PR10/EC＝PUD/OPET6/ANC＝PUD/PH3O//PPA25[0.24]

Embodiment 49

The formation of the battery packaging material laminated structure among the embodiment 49 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 48; except following difference; the thick acrylic resin film of 3 μ m is used as protective layer 15; be used as innermost layer 14 by the thick random polypropylene film of 10 μ m, homo-polypropylene film and the thick co-extruded films that butylene-the atactic propene copolymer film is formed of 20 μ m that 20 μ m are thick, and the random polypropylene face of innermost layer 14 is laminated on the first intermediate layer 13a as stromatolith.

ON25/PUD/AL(#3)50/PZ/AC3/IL＝PAD/PR10/EC＝PUD/OPET6/ANC＝PUD/PR10//PH2O//BR20[0.4]

Embodiment 50

Be laminated to together by dried lamination orientation copolyester film that 16 μ m are thick (as outermost layer 11) and the 50 μ m thick aluminum foils (AL (#3)) that scribble trivalent chromium film (as antiacid film); on the acidproof chromium film of the above-mentioned trivalent of aluminium foil, form the thick acrylic resin film of 4 μ m as protective layer 15; by the thick random polypropylene film of 5 μ m; the co-extruded films that the random polypropylene film that homo-polypropylene film that 30 μ m are thick and 5 μ m are thick is formed is used as intermediate layer 13; by the heat laminating that uses unsaturated carboxylic acid graft random polypropylene adhesive protective layer 15 and intermediate layer 13 are laminated to together; the unsaturated carboxylic acid graft random polypropylene film that 20 μ m are thick is used as innermost layer 14, and is laminated on the intermediate layer 13 by heat laminating innermost layer 14 and makes laminated body.

The aluminium foil AL (#3) that uses, as micro constitutent, iron content 1.5%, silicon 0.09%, manganese 0.5%.

ON25/PUD/AL(#3)50/3C/AC4/TL＝PAD/PR5//PH3O//PR5/TL/PPA20[0.19]

Embodiment 51

The formation of the battery packaging material laminated structure among the embodiment 51 is to use the similarity method that forms the battery packaging material laminated structure among the embodiment 50; except following difference; lithoform is used as antiacid film; the co-extruded films of being made up of thick low density polyethylene films of 5 μ m and the thick thick low density polyethylene films of density polyethylene film with high 5 μ m of 30 μ m is used as intermediate layer 13; be laminated on the protective layer 15 by dried lamination intermediate layer 13; the ethylene-methyl methacrylate methyl esters film that 20 μ m are thick is used as innermost layer 14, and by heat laminating intermediate layer 13 and innermost layer 14 is laminated to together.

ON25/PUD/AL(#3)50/PZ/PET5/PUD/LD5//HD30//LD5/TL/EAM20[0.18]

The cup pattern is pressed the evaluation of packaging character characteristics

To the result that the foregoing description carries out every evaluation, as follows, all obtained good performance.

1. electrolyte resistance characteristic: the lamination delamination do not occur

2. steam cuts off property: below the 300ppm

3. innermost layer sealing (anti-stripping) intensity: 9.8N/15mm above (when keeping under 40 ℃)

Above 9.8N/15mm (when keeping under 120 ℃)

4. anti-electrode nipple short-circuit capacity

The lamination delamination does not appear in outermost layer and corresponding insulating course.

In arbitrary outermost layer, do not form pin hole.

Arbitrary insulating course does not contact with electrode nipple.

5. formability

In any one mold pressing battery packages, all do not form pin hole.

As shown in Figure 3, laminated structure 10 can be to form in the following manner: the formation of the first son structure is with outermost layer 11 with insulating course 12 is bonded together, handles the surface of insulating course 12 and bonding protective layer 15 on insulating course 12 by dried stack membrane DL; The formation of the second son structure is by dried stack membrane DL the first intermediate layer 13a and the second intermediate layer 13b to be bonded together formation by the two-layer intermediate layer of forming 13 and by dried lamination DL film innermost layer 14 to be adhered on the intermediate layer 13; The heat laminating of heat laminating film TL by using Thermoadhesive is bonded together the first and second son structures.

The form of lithium battery is the form of the above-mentioned external packing body when being used as the packaging material that constitute lithium battery external packing body with the laminated body among the present invention, can enumerate pouch-type or concavo-convex mold pressing type (cup type).The packing bag be above-mentioned pouch-type except the pillow type bag body, can also be three limit closed type bags shown in Fig. 5 (a) or four limit closed type bags shown in Fig. 5 (b).In the bag of these forms each all is to make the sealed package that contains the part of joint (electrode) at hermetic terminal, and the part of joint is exposed the outside in external packing.As Fig. 5 (c), 5 (d), shown in 5 (e), joint can reach the outside from the optional position of external packing hermetic unit.

Usually, the battery external packing 4 of packaging material for lithium battery laminated structure of the present invention is the concavo-convex mold pressing type shown in Fig. 2 (b) sometimes.The mold pressing power brick is equipped with container bottom material 6 and lid 7, and container ground 6 holds the concavo-convex mold pressing part 8 of having of battery main body and constitutes with lid 7 flange portions 9 that carry out sealed package by becoming.Basically, the battery packaging material laminated structure that four-layer structure is arranged as shown in Fig. 2 (a) is used as formation container ground 6.The mylar that forms outermost layer 11 and/or intermediate layer 13 is pet copolymer or polybutylene terephthalate (PBT) copolymer.Being preferably the film that forms outermost layer 11 and/or intermediate layer 13 is oriented under low extensibility.When using such copolymer, the container ground 6 shown in Fig. 6 (a) can be made square by moulding.Make container and can be formed following shape easily: ratio D/T is more than 1/50, and T is the width of container 6 open ends, D be the degree of depth of container 6 shown in Fig. 6 (a '), and sidewall tilts with 130 ° of following tilt angle theta.Wish to use the above aluminium foil of 30 μ m to form insulating course to avoid formation pin hole when the processed moulding of battery packaging material laminated structure.In Fig. 6 (a), have to be equipped with on the container ground 6 of concavo-convex mold pressing part 8a and cover at 7 o'clock, because that lid 7 does not have is concavo-convex, so need not to be co-polymer membrane.Shown in Fig. 6 (b) and 6 (b '), when use has a pair of container ground 6 and the 6 ' time of concavo-convex mold pressing part 8, container 6 and container 6 ' all form by the battery packaging material laminated structure.

Because the lithium battery external packing has made concavo-convex mold pressing type, so can accurately hold the lithium battery main body.

When using concavo-convex mold pressing type battery external packing, the same with pouch-type, shown in Fig. 6 (c) or 6 (d), (electrode) joint can reach the outside from the optional position of external packing hermetic unit.

Because the external packing of the pouch-type that is formed by lithium battery packaging material of the present invention, lithium battery itself is flexible, and can make the gross thickness slimming than the more lightweight of lithium battery of use metal can, and can reduce the space when being used to hold battery.Packaging material for lithium battery laminated structure of the present invention has high barrier character, can keep barrier character for a long time, and has good thermal endurance, cold resistance and anti-content rerum natura etc.

Second embodiment

Illustrate in greater detail in following for the packaging material that relate in second embodiment of the present invention.In the following description, be to put down in writing as an example, but the packaging material according to the invention laminated structure also is suitable for as food and pharmaceutical packing material with the packaging material of lithium battery.

The enforcement illustration of Fig. 7 (a)-(e) expression packaging material of the present invention, Fig. 7 (a) are basic layer structure charts, and Fig. 7 (b) is another embodiment layer structure chart, and Fig. 7 (c) is the perspective view of the structure of explanation lithium battery, and Fig. 7 (d) is along the line X among Fig. 7 (c) ₁-X ₁The cross section view of being done, Fig. 7 (e) are along the line X among Fig. 7 (c) ₂-X ₂The section amplification figure of being done.The figure of another embodiment of Fig. 8 (a)-(c) expression packaging material of the present invention, Fig. 8 (a) is the basic layer structural map of another packaging material laminated structure of the present invention, Fig. 8 (b) is the perspective view of explanation lithium battery, Fig. 8 (c) is the lithium battery perspective view of the external packing of moulding type, and Fig. 8 (d) is along the line X among Fig. 8 (c) ₃-X ₃The cross section view of being done.Fig. 9 (a) and 9 (b) are to use the plan view of other form of external packing body of the lithium battery of battery packaging material of the present invention respectively, and Fig. 9 (a ') and 9 (b ') are respectively along Fig. 9 (a) center line X ₃-X ₃And Fig. 9 (b) center line X ₄-X ₄The cross section view of being done.

The inventor can address these problems by multi-layer packaging material laminate tectosome (forming from following material), and finish the present invention thus by found that the problem to be solved in the present invention is conscientiously studied.The lithium battery that the present invention relates to, as shown in Fig. 7 (c) and 7 (d), in the external packing body (battery packages bag) 4 of the pillow type shape by lithium battery main body 2 being sealed in the back of the body envelope 5f of portion, and make the part of electrode 3 reach the outside of battery external packing 4 and the periphery that seals external packing body 4 forms the peripheral part 5 that seals.Basically, as shown in Fig. 7 (a), be used to form the packaging material for lithium battery (or laminated structure) 10 of above-mentioned external packing body, outermost layer 11/ steam insulating course 12/ innermost layer 14 is arranged.By each layer of these 3 layers of laminated body that constitutes 10, adopt following material respectively.

The pouch-type that the packaging material laminated structure that the present invention relates to is processed to form shown in Fig. 7 (c) is packed the moulding pressing package body shown in bag and Fig. 8 (b).Fig. 9 (a) and 9 (a ') have shown that one three side seals type packing bag and Fig. 9 (b) and 9 (b ') have shown a four side closed type packing bag.

The above-mentioned outermost layer 11 that the present invention relates to is formed by oriented polyester resin or oriented nylon resin.At this moment, can enumerate PETG, polybutylene terephthalate (PBT), PEN, PBN and Merlon etc. as polyester.Can enumerate polyamide as nylon resin, as nylon 6 and nylon 66.This outermost layer 11 comprises at least more than one deck 6 μ m, more preferably thick oriented polyester or oriented nylon film in 12 to 25 mu m ranges.When in lithium battery, using the packaging material laminated structure, because outermost layer 11 is the positions that directly contact with equipment (hardware).Therefore, wish to be formed with the resin of insulating properties.Because having in pin hole and the work in-process film, the film of the pure outermost layer 11 of formation will form pin hole, so the thickness of outermost layer 11 is necessary for more than the 6 μ m.More preferably, the thickness of outermost layer 11 is in 12 to 25 mu m ranges.In the present invention, in order to improve anti-pinhole characteristics and to improve it during as the battery external packing and the insulating capacity of hardware, outermost layer 11 can be formed by stack membrane.More preferably, outermost layer 11 comprises at least one two-layer above resin bed, and the thickness of each layer is more than the 6 μ m, preferably in 12 to 25 mu m ranges.Below 1) to 6) multi-ply construction is the example of multilayer outermost layer 11.

1) orientation PETG film/oriented nylon film

2) orientation PETG film/polyethylene film

Preferred use one deck fluorocarbon resin or silicone resin form the outermost layer of sandwich construction or apply outermost surface with it, so that improve the mechanical adaptive character (stability in transit on package packing machine and processing equipment) of packaging material laminated structure, under the situation of carrying out moulding lithium battery usefulness external packing body as secondary operations, the friction when reducing moulding between outermost layer and the mould.

3) (fluorocarbon resin is with membranoid substance, or with dry formation the in liquid state coating back for fluorocarbon resin film/orientation PETG film.)

4) (silicone resin is with membranoid substance, or with dry formation the in liquid state coating back for silicone resin film/orientation PETG film.)

5) fluorocarbon resin film/orientation PETG film/oriented nylon film

6) silicone resin film/orientation PETG film/oriented nylon film

The adhesive phase that is used for outermost layer 11 is laminated to together is by mylar, polyether resin, urethane resin, polyethers-urethane resin, polyester-urethane resin, isocyanate resin, vistanex, polyethylene-imide resin, cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin, silicone resin, and the mixture of the modifier of these resins and these resins constitutes.

Insulating course 12 is to prevent that steam and other gas from penetrating into the layer of the inside of packing bag from the outside.Insulating course 12 is to be formed by the yielding metal that flexibility is arranged, and is preferably formed by the soft aluminium of iron content in 0.3 to 9.0% scope.

As the aluminium foil of packaging material is as the material that the property cut off is arranged mostly, uses with other material laminate.But, to compare with other metal, aluminium is to organic solvent, and the corrosiveness of bronsted lowry acids and bases bronsted lowry is more responsive relatively.In the active material and polyelectrolyte of most of lithium batteries in the lithium battery main body, all contain organic solvent, as ethylene carbonate, propylene carbonate, diethyl carbonate, dimethyl carbonate or acetone etc.It is hydrofluoric acid (HF) that the lithium salts reaction that contains in water and the polyelectrolyte produces a kind of strong acid.When aluminium foil surface during by these organic solvents and acid corrosion, the bonding strength between aluminium foil and innermost layer or the intermediate layer descends, and the packaging material laminated structure behind the lamination is decomposed (delamination), and has lost the function of packaging material laminated structures.

The inventor finds shown in Fig. 7 (b), can have resin bed (referring to " protective layer 15 " later on) antiacid, solvent resistance by coating formation on aluminium foil and prevent the corrosion of aluminium foil surface by various tests.Also unexpected discovery, above-mentioned resin bed (protective layer 15) are not only to the protection aluminium foil surface effectively but also can effectively intermediate layer 13 be adhered on the aluminium foil.According to the present invention; the suitable material that is used to form protective layer 15 (being coated on the aluminium foil) can be enumerated; comprise that one deck contains unsaturated carboxylic acid graft vistanex (Poa) at least; conjugated polyester resin (Co-PET) (as pet resin and polybutylene terephthalate (PBT) resin); ionomer (Io); vinyl-vinyl acetate copolymer (EVA); ethylene-acrylic acid copolymer; ethylene-methacrylic acid copolymer (EMA); the resin bed of the modifier of polyethers-urethane resin (PeU) and these resins, and this resin bed contains at least a in these resins more than 30% and the modifier thereof.

According to the present invention, intermediate layer 13 can be sandwiched between insulating course 12 and the innermost layer 14.Owing to intermediate layer 13 is set, uses heat and pressure to make innermost layer 14 thermal adhesive layer attenuation cause electrode 3 and aluminum insulating course 12 to come in contact (short circuit) in the hot sealing process in the time of can protecting insulating course 12 and can prevent owing to the formation bag.In addition, intermediate layer 13 the conform ability of (thermal endurance, cold resistance) of battery of can also playing stably.The thickness in intermediate layer 13 is more than the 10 μ m, and fusing point is more than 80 ℃.Preferably, intermediate layer 13 comprises at least one layer thickness in 12 to 25 mu m ranges and be by mylar, the layer that vistanex or fluorocarbon resin form.

Intermediate layer 13 is not only individual layer and also can be formed so that it has the function of enhancing by multi-ply construction.When making intermediate layer 13 multiple stratifications, intermediate layer 13 can be formed it or adopted dried laminated process that each layer laminate is formed by the coextrusion laminated process.For example, when making intermediate layer 13 multiple stratifications, constitute, and the thickness of each layer is preferably, in 15 to 25 mu m ranges all in 10 to 100 mu m ranges by layer more than 2 layers shown below by coetrusion.Following multi-ply construction 1) to 9) be the example in the intermediate layer 13 of the multilayer that forms by coextrusion.

1) unsaturated carboxylic acid graft polyethylene/HDPE

2) unsaturated carboxylic acid graft polypropylene/PP (fusing point: more than 120 ℃, be preferably more than 135 ℃)

3) unsaturated carboxylic acid graft polymethylpentene resin/polymethylpentene (fusing point: more than 120 ℃, be preferably more than 135 ℃), HDPE or PP

4) unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene/unsaturated carboxylic acid graft polymethylpentene resin (two-layer)

5) unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene/unsaturated carboxylic acid graft polymethylpentene resin/unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene (three layers)

6) unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene/unsaturated carboxylic acid graft polymethylpentene resin/unsaturated carboxylic acid graft polymethylpentene (three layers)

7) unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene/unsaturated carboxylic acid graft polymethylpentene resin/polymethylpentene/unsaturated carboxylic acid graft polymethylpentene (four layers)

8) unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene/unsaturated carboxylic acid graft polymethylpentene resin/polymethylpentene/unsaturated carboxylic acid graft polymethylpentene/unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene (five layers)

9) unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene/unsaturated carboxylic acid graft polymethylpentene resin/unsaturated carboxylic acid graft polyethylene or unsaturated carboxylic acid graft polypropylene (three layers)

Following multi-ply construction 1) to 9) be example by the intermediate layer 13 of dried lamination formation.

1) sublayer 1 (unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene resin bed)/HDPE

2) sublayer 1/PP (fusing point: more than 120 ℃, be preferably more than 135 ℃)

3) sublayer 1/ polymethylpentene

4) sublayer 1/ unsaturated carboxylic acid graft polymethylpentene (fusing point: more than 135 ℃, Vicat softening point is more than 110 ℃)

5) sublayer 1/ orientation PETG

6) sublayer 1/ polybutylene terephthalate (PBT)

7) sublayer 1/ PEN

8) sublayer 1/ fluorocarbon resin

9) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene resin/HDPE, PP, polymethylpentene, unsaturated carboxylic acid graft polymethylpentene resin, orientation PETG, polybutylene terephthalate (PBT), PEN, fluorinated hydrocarbon resin/unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene resin

Being used for the available adhesive phase that 13 each sublayer, aforementioned intermediate layer are bonded together is polyethers-urethane adhesives, polyester-urethane adhesives, isocyanate adhesive, polyolefin-based adhesive, polyethylene-imines adhesive, cyanoacrylate adhesive, organic titanic compound, epoxy adhesive, acid imide adhesive and silicone adhesive.

The mylar that is used to form intermediate layer 13 can comprise pet copolymer and polybutylene terephthalate (PBT) copolymer.

Lithium battery among the present invention must reach following requirement with the innermost layer 14 of packaging laminate tectosome material, can be bonding by heat-sealing with another innermost layer 14, simultaneously can also Thermoadhesive also be arranged with metal such as electrode 3 (Fig. 7 (e)), and to not going bad and the result of the material research of deterioration is because of content, by thickness is more than the 10 μ m, be preferably in 50 to 100 mu m ranges, fusing point is more than 80 ℃, and Vicat softening point is the unsaturated carboxylic acid graft polyvinyl resin more than 70 ℃, unsaturated carboxylic acid graft vistanexes such as unsaturated carboxylic acid graft acrylic resin and unsaturated carboxylic acid graft polymethylpentene resin can demonstrate good result when forming.

But the unsaturated carboxylic acid graft vistanex can satisfy and the requirement of cementability, thermal endurance, cold resistance and the flexibility (adaptability) of operation (bag, mouldability) of electrode 3.

When the thickness of innermost layer 14 during less than 20 μ m, during with electrode 3 heat-sealings, hermetic unit has the slit, and the result has lost packing and prevents that outside steam from entering the barrier character in the packing.In addition, when the low excessively material of fusing point and Vicat softening point is formed because thermo-labile, frigolabile, so each layer each other and and electrode 3 between bonding strength low, packaging bag may be broken.Even the thickness of innermost layer 14 surpasses 100 μ m, heat-seal bond strength between the innermost layer 14 that is heat-sealed is also constant, but the thickness as laminated body increases, and the packing that laminated structure forms just needs bigger installing space, and this and space-efficient of the present invention purpose are not inconsistent.Though aforementioned unsaturated carboxylic acid graft polymer can be used alone, then gratifying characteristic can be arranged by some materials of producing that mix in these unsaturated carboxylic acid graft polymer.

Usually, the grooved mold pressing external packing box 4 shown in Fig. 8 (b) is formed by packaging material laminated structure of the present invention.The mold pressing packing box has container ground 6 by having concavo-convex mold pressing part 8 (taking in battery main body uses) and flange 9 and lid 7 to constitute, and covers 7 sealed being adhered on the flange 9.Basically, container ground 6 is to be formed by five layer laminate tectosomes shown in Fig. 8 (a).And the mylar that forms this outermost layer 11 and/or intermediate layer 13 is pet copolymer or polybutylene terephthalate (PBT) copolymer, is preferably, and the film that forms this outermost layer 11 and/or intermediate layer 13 is oriented under low extensibility.When using such copolymer, the cell body of moulding be shaped as square, good to the taking in property of battery main body.Because it is not molded to be attached to the lid 7 of container ground 6, so need not to be co-polymer membrane.

Because the acid that the lithium cell electrolyte moisture absorption generates may be corroded to the aluminium foil surface that forms above-mentioned insulating course 12, and intermediate layer 13 comes off from insulating course aluminium foil 12.For discovering of preventing that aluminium foil corrosion from carrying out; shown in Fig. 7 (b); can protect aluminium foil not to be corroded by the following method; promptly; coating has secondary workability, thermal endurance, cold resistance material coating or applies protective layer 15 in advance on aluminium foil in advance, and this protective layer 15 is by forming at aluminium foil surface coating molten resin.This coating and protective layer 15 can be used alone, can be modified or can be two or more mixing use.With one deck effect hour, aluminium foil can coated laminated coating when only.

As protective layer 15 can be; between insulating course 12 and the intermediate layer 13 or forming thickness between insulating course 12 and the innermost layer 14 in 0.5 to 50 mu m range; be preferably; in 1 to 30 mu m range; fusing point is more than 80 ℃; Vicat softening point is more than 70 ℃, and the protective layer 15 that is made of any unsaturated carboxylic acid graft polyolefin that comprises unsaturated carboxylic acid graft polyvinyl resin, unsaturated carboxylic acid graft acrylic resin and unsaturated carboxylic acid graft polymethylpentene resin.The protective layer 15 that is made of the unsaturated carboxylic acid graft polyolefin resin layer can be formed by following method; on the surface of the innermost layer of insulating course, form this protective layer by extrusion coating, or be laminated to by the film that dried lamination or heat laminating constitute above-mentioned unsaturated carboxylic acid graft vistanex on the similar face of insulating course 12 and form this protective layer.

Formation method as protective layer 15; be to form coating and at 150 ℃ by the surface that is positioned at innermost layer one side at insulating course 12; in time coating is carried out baking processing more than 10 seconds and can form protective layer 15; this coating is that thickness is in 0.5 to 10 mu m range; be preferably the resin bed in 1 to 30 mu m range; this resin comprises at least a and content in the following material more than 30%, i.e. epoxy resin; polyimide resin; unsaturated polyester resin; alkyd resins; phenol resin; thermosetting acrylic resin; polyamide; fluorocarbon resin; the unsaturated carboxylic acid graft vistanex; pet copolymer; the polybutylene terephthalate (PBT) polymer; polyester and vinyl-vinyl acetate copolymer; polyester-polystyrene copolymer; ionomer; the copolymer of ethene and acrylic acid derivative; the copolymer of ethene and methacrylic acid derivative.

In addition; can also form thickness in 0.5 to 50 mu m range; be preferably; in 1 to 30 mu m range; and by comprising at least a and content in the following material at the material more than 30%; be epoxy resin; polyimide resin; unsaturated polyester resin; alkyd resins; phenol resin; thermosetting acrylic resin; polyamide; fluorocarbon resin; the unsaturated carboxylic acid graft vistanex; pet copolymer; the polybutylene terephthalate (PBT) copolymer; polyester and EVAc; polyester-polystyrene copolymer; ionomer; the copolymer of ethene and acrylic acid derivative; the copolymer of ethene and methacrylic acid derivative constitutes the film of protective layer, bonds to also passable together by dried lamination.In this occasion; can be in 1 to 10 mu m range and be that to carry out lamination by the film that one of following material forms also passable at intervening thickness between insulating course and the protective layer, said material is polyethers-urethane resin, polyester-urethane resin, isocyanate resin, vistanex, polyethylene-imide resin, cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin and silicone resin.

As other laminating method; can be positioned at the surface formation protective layer 15 of innermost layer one side at insulating course 12; this protective layer thickness is in 0.5 to 10 mu m range; be preferably in 1 to 30 mu m range; the material that forms this layer comprises at least a and content in the following material more than 30%; said material is an epoxy resin; polyimide resin; unsaturated polyester resin; alkyd resins; phenol resin; thermosetting acrylic resin; polyamide; fluorocarbon resin; the unsaturated carboxylic acid graft vistanex; pet copolymer; the polybutylene terephthalate (PBT) polymer; polyester and vinyl-vinyl acetate copolymer; polyester-polystyrene copolymer; ionomer; the copolymer of ethene and acrylic acid derivative; the copolymer of ethene and methacrylic acid derivative; and between above-mentioned protective layer 15 and intermediate layer 13; what perhaps sandwich a kind of thickness 1 to 50 μ m between protective layer 15 and the innermost layer 14 is more than 80 ℃ by containing fusing point, and Vicat softening point is that the packaging material of the above-mentioned formation that constitutes of the resin bed of unsaturated carboxylic acid graft polypropylene more than 70 ℃ or unsaturated carboxylic acid graft polymethylpentene carry out heat laminating and form.Owing to adopt this method, can improve the bonding strength between insulating course 12 (more accurate theory, protective layer 15) and the intermediate layer 13, and can prevent because the delamination that causes when thermal endurance, cold resistance and secondary operations.

Can form silane coupling agent layer between protective layer 15 and the insulating course 12 so that the bonding strength between enhancing insulating course 12 and the protective layer 15.

As the laminating method of packaging material of the present invention, the dried lamination of adhesive layer 26 that can be by using dried lamination is laminated to above-mentioned protective layer 15 and intermediate layer 13 or innermost layer 14 together, and intermediate layer 13 and innermost layer 14 are laminated to together.

(thickness is in 10 to 50 mu m ranges to be used for the adhesive layer 26 of dried lamination; be preferably in 15 to 25 mu m ranges), be to be clipped between innermost layer 14 or intermediate layer 13 and insulating course 12 or the above-mentioned protective layer 15 by the sandwich lamination of conduct that extruding unsaturated carboxylic acid graft polyolefin such as unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene form.Perhaps, press between insulating course 12 and the intermediate layer 13, and the order between intermediate layer 13 and the innermost layer 14 is laminated to also passable together in advance with above-mentioned resin system film.

According to the present invention, stable cell packaging material laminated structure composition layer is the film forming characteristics of laminated structure in order to improve also, lamination processing characteristics and secondary processing behaviour (moulding and bonding), forming layer can handle through surface activation or passivation technology, handle as corona discharge process, spray technology is handled, oxidation technology is handled or the ozonisation PROCESS FOR TREATMENT, perhaps one of following at least material is added into and forms in the layer, these materials are hygroscopic agent or the water absorbing agents as drier etc., the gas of oxygen or nitrogen etc. cuts off agent or gas absorbent, fire retardant, carbon, the antistatic agent of surfactant or inorganic oxide etc. or charged preventor, conductive material and electromagnetic shielding material etc., inorganic organic metal additive perhaps comprises in these materials the liquid of at least one and is made to and is coated with stratiform and is coated to and forms on the layer.

When lamination packaging material for lithium battery of the present invention, can pass through T-pattern method, inflatable method or coetrusion etc. are made film, and these film laminations can be got up by the heat laminating of coating, evaporation, ultraviolet curing, electronic beam curing, dried lamination, extruding lamination, coextrusion lamination or use thermal adhesive layer 26a.Below be the laminating method of Three Represents, can be used as and carry out the method that lamination uses.

(1) method, this method is laminated to together outermost layer 11 and insulating course 12 so that form the first son structure, intermediate layer 13 and innermost layer 14 are laminated to together so that form the second son structure, and the first and second son structures are laminated to together by heat laminating.

(2) methods, this method is laminated to together outermost layer 11 and insulating course 12 so that form the first son structure, a part and the innermost layer 14 in intermediate layer 13 are laminated to together so that form the second son structure, or this method only forms outermost layer 11 and use intermediate layer 13 to push lamination (containing coextrusion).When needs, laminated structure can be through heat laminating PROCESS FOR TREATMENT once more.

(3) methods, with outermost layer 11, insulating course 12 and innermost layer 14 all fit to together by dried lamination.

Packaging material according to the invention not only can be used as the packaging material that above-mentioned lithium battery uses but also can be used for forming general objects packs bag and lamination tubular container.

Embodiment

In order to specifically describe the present invention, the laminated body that is produced as follows pouch-type and moulding type is also estimated it respectively.

As evaluation, the outward appearance of a) checking battery of embodiment and Comparative Examples, whether pin hole takes place, whether the section of heat sealing part of checking electrode of lithium cell is to contact b between inspecting electrode and the insulating course) the environment time storage of (1) 40 ℃ of environmental condition and (2) 60 ℃ of 90%RH and 85 ℃ (doing) is after 10 days, checks its following characteristic.

Steam cuts off property: detect battery by karl fischer method and include amount of moisture, whether the amount of moisture increase is below 50% in the battery for confirmation, and checks and have or not the delamination situation between each layer.

1. the occasion of bag type: make the packing bag of 30mm * 60mm, will have the thick battery main body of 4mm of the thick nickel system electrode of 100 μ m to put into bag, by sealing opening portion is sealed (sealing of three limits) with electrode then.200 ℃ of heat-sealing temperatures, pressure 1kg/cm ²Hot pressing condition handle down bag to form sealed width 1 second be 10mm.

The formation of laminated body is about PET (16)＜D〉AL (20)＜TL〉unsaturated carboxylic acid graft polyethylene (20)＜D〉PET (16)＜D〉unsaturated carboxylic acid graft polypropylene (50), carry out lamination by condition shown in the table 2-1.

1 of table 2-1 trial-production condition

	Aluminium foil		Pinhole number		The blank rerum natura
							Thickness μ m	Iron content %	Blank	Packaging bag	Degree of stretching %	Hot strength N/mm 2
	Embodiment 1	15	0.3	Do not have	Do not have	5							78
Embodiment 2							15	9.0	Do not have	Do not have	8	102
	Embodiment 3	20	0.7	Do not have	Do not have	7							80
Embodiment 4							20	2.0	Do not have	Do not have	10	95
	Embodiment 5	80	0.3	Do not have	Do not have	17							105
Embodiment 6							80	9.0	Do not have	Do not have	25	107
	Comparative example 11	12	0	1	2	4							65
Comparative example 12							20	0.2	0	1	5	72
	Comparative example 13	12	2.0	1	Do not have	10							95

2. the occasion of compression molding package-type: form the mold pressing battery packages by compacting, the size of its moulding section is, the size of 30mm * 60mm * 4mm (degree of depth) and the wide flange of 7mm is arranged, to there be the thick battery main body of 4mm of the thick nickel system electrode of 100 μ m partly to put into after the boxlike mold pressing battery packages, on flange, by the heat-sealing cover material with the lithium battery body seal in the mold pressing packing box.

The formation of laminated structure is for polyester copolymer (CPET) 16＜EC〉PE20＜EC AL＜TL unsaturated carboxylic acid graft polyethylene 20＜D CPET (16)＜D unsaturated carboxylic acid graft polyethylene (50) by the table 2-2 shown in each condition carry out lamination.Herein,＜and EC〉representative extruding lamination.

2 of table 2-2 trial-production condition

	Aluminium foil		Draw ratio	The above pin hole of 5 μ m of forming part several
					Thickness μ m	Iron content %	The degree of depth/length
	Embodiment
1		15	0.3	1/40	Do not have
	Embodiment 2					15	9.0	5/40	Do not have
Embodiment 3		20	0.7	5/40	Do not have
	Embodiment 4					20	2.0	5/40	Do not have
Embodiment 5		80	0.3	1/20	Do not have
	Embodiment 6					80	9.0	5/20	Do not have
Comparative example 1		12	0	1/40	2
	Comparative example 2					20	0.2	5/40	1
Comparative example 3		12	2.0	5/40	2
	Comparative example 4					80	0	1/20	No *

^*Though do not form any pin hole, laminated structure crumple when compression moulding.

The packing box of the battery compression molding of embodiment 1 to 6 does not all form any pin hole.The peel strength of stick portion is 100g/m ²More than.But the laminated structure that Comparative Examples 1 to 4 compression molding packing box is used has pin hole, and has wherein formed pin hole again when laminated structure is pressed.

Iron content is in 0.3 to 2.0% scope in the aluminium foil that uses, more preferably when 0.5 to 1.2% scope, can prevent from when the packing bag is made in moulding, to form pin hole in the sidewall, the peripheral part of laminated structure has gratifying ductility when carrying out drawing and forming, particularly, can carry out the processing and forming of square.In addition, form the protective layer that covers insulating course innermost layer one side surface and can prevent to be corroded by acid or carbonate solvent, and can prevent laminated structure generation delamination as the aluminium foil surface of insulating course.The outermost layer of laminated structure or intermediate layer are because the mylar that uses is pet copolymer, polybutylene terephthalate (PBT) copolymer, so have gratifying machinability.

The 3rd embodiment

The embodiment of laminated structure in the third embodiment of the invention will be described below.Just in the configuration aspects of laminated structure 10, the 3rd embodiment is different from first embodiment, and identical with first embodiment of demonstration among Fig. 1 to 6 substantially in others.

Therefore, with reference to Fig. 1 to 6 the 3rd embodiment is described.

In the description of the 3rd embodiment, the part identical with first embodiment will be used identical symbol, and the description of this part will be omitted.

The outermost layer 11 that comprises in the laminated structure 10 among the present invention is made of oriented polyester or oriented nylon film.The example that is used to form the specifiable mylar of outermost layer 11 is pet resin, polybutylene terephthalate (PBT) resin, PEN resin, PBN resin, polyester copolymer, polycarbonate resin etc.The example that is used to form the specifiable nylon resin of outermost layer 11 is a polyamide, comprises nylon 6, nylon 6,6, nylon 6,6-nylon 6 copolymers, nylon 6,10, poly-between benzene two methylene adipamides (MXD6) etc.

When in equipment (hardware), using lithium battery, are parts of contact arrangement because of outermost layer 11.Therefore, the resin that preferably has insulating properties is basically formed outermost layer 11.Owing to form the film of outermost layer 11 itself pin hole is arranged, and will form pin hole in the course of processing film time, the thickness of outermost layer 11 is necessary for more than the 6 μ m.More preferably, the thickness of outermost layer 11 is at 12 to 25 mu m ranges.

In the present invention, during for the anti-pinhole characteristics that improves outermost layer 11 with as the battery external packing and the insulating capacity of hardware, outermost layer can be formed by stack membrane.

Preferably, outermost layer 11 comprises at least one resin bed, and this resin bed is made up of two-layer above layer, and the thickness of each layer is more than the 6 μ m, is preferably, in 12 to 25 mu m ranges.Following laminated structure 1) to 6) be the embodiment of the outermost layer 11 of laminated construction.

1) orientation PETG film/oriented nylon film

2) orientation PETG film/polyethylene film

For the mechanical property (in package packing machine and processes stability mechanically in transit) that improves the packaging material laminated structure and surface protection characteristic (thermal endurance and electrolyte-resistant characteristic) and in order to alleviate friction between outermost layer and the mould (when the packaging material laminated structure stands moulding process; use mould to form concavo-convex mold pressing) as the situation of secondary operations lithium battery with external packing box; be preferably formed as the outermost layer of sandwich construction or apply one deck fluorocarbon resin, acrylic resin or silicone resin at outermost surface.For example,

3) fluorocarbon resin film/orientation PETG film (the fluorocarbon resin film can be a membranoid substance, or dry formation the in the coated back of fraction)

4) silicone resin film/orientation PETG film (the silicone resin film can be a membranoid substance, or dry formation the in the coated back of fraction)

5) fluorocarbon resin film/orientation pet resin/oriented nylon resin

6) silicone resin/orientation pet resin/oriented nylon resin

7) acrylic resin/oriented nylon resin (acrylic resin film can be a membranoid substance, or the coated back of fraction dry solidification forms)

By the dried lamination (DL) of use bonding film or by the extruding lamination, outermost layer 11 is adhered on the insulating course 12.

Above-mentioned insulating course 12 is in order to prevent that particularly steam penetrates into lithium battery 1 inside and the layer of setting from the outside.So for the ill-effect of the pin hole that prevents from the insulating course 12 to form with in order to stablize machinability (be easy to make bag or concavo-convex mold pressing is arranged mouldability), and in order to make insulating course 12 have anti-pinhole characteristics, insulating course 12 is that metal (as aluminium or nickel etc.) paper tinsel or inorganic compound (as silicon dioxide or aluminium oxide etc.) film more than the 15 μ m forms by thickness.Be preferably, insulating course 12 is thickness aluminium foils at 15 to 80 mu m ranges.

How the inventor is to more effectively preventing to form pin hole, and the problem that the concavo-convex mold pressing that prevents lithium battery external packing body partly forms crackle is studied, and find to work as the iron content of the aluminium foil that forms insulating course 12 in 0.3 to 9.0% scope, be preferably when 0.7 to 2.0% scope, more superior aspect the ductility, and the laminated structure with this aluminium foil insulating course is difficult for forming pin hole and can more easily concavo-convex mold pressing be formed with the outer containter of the concavo-convex mold pressing type of sidewall this aluminium foil when being bent than nonferrous aluminium foil.Iron content be less than 0.3% aluminium foil preventing pin hole form and improve can the mouldability of concavo-convex mold pressing type aspect not effect.And but iron content surpasses 9.0% aluminium foil hardening and damage the bag processability of laminated structure when making bag.

The flexibility of aluminium foil, robustness and hardness depend on by the annealing conditions of the aluminium foil of cold rolling formation (so-called annealing in process).More preferably use flexible, soft through annealing in process aluminium foil rather than use duralumin without annealing.The flexibility of aluminium foil, robustness and hardness, that is, annealing conditions can optionally determine by considering machinability (being easy to make packing bag or concavo-convex compression molding).For example form pin hole when preventing laminated structure by concavo-convex mold pressing and produce the angle of wrinkle, slight or dead annealed soft aluminium foil is better than unannealed duralumin paper tinsel.

The inventor finds can effectively prevent because the aluminium foil surface dissolving that hydrofluoric acid causes by following technology; corrosion; particularly be present in the pellumina dissolving of aluminium foil surface; corrosion; (HF is produced by electrolyte for Lithium Battery and reaction of moisture); also can effectively improve the adhesion characteristic (adhesional wetting property) of aluminium foil surface and can effectively stablize bonding strength between aluminium foil and the innermost layer; these technology are by apply antiacid film TR at aluminium foil surface; improve treatment process and form protective layer 15 at aluminium foil surface by adhesion properties, perhaps being used in combination the above technology of these technical finesse aluminium foil surfaces (Fig. 3) has remarkable result to solving above-mentioned problem.

Preferably, remove oxide and oil from aluminium foil surface by using acid solution and aqueous slkali that aluminium foil surface is cleaned.The suitable acid that is used to clean comprises inorganic acid and organic acid, inorganic acid comprises sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, hydrofluoric acid and chromic acid, and organic acid comprises dithiocarbamic acid, oxalic acid, tartaric acid, citric acid, formic acid, lactic acid, glycolic, acetate, gluconic acid, butanedioic acid and malic acid.A kind of (as main component) in these acid and proper additive can be mixed and prepare the liquid that is used to clean.The suitable alkali that is used to clean is hydroxide (comprising NaOH), carbonate (comprising sodium carbonate and sodium acid carbonate), phosphate (comprising dibastic sodium phosphate and sodium phosphate), polyphosphate (comprises sodium pyrophosphate, sodium phosphate trimer and sodium tetrapolyphosphate), silicate (comprising sodium orthosilicate and sodium metasilicate).Though more than enumerated sodium salt, also can use sylvite and ammonium salt.A kind of and proper additive in these alkali can be mixed and prepare the alkali lye that is used to clean.

Be applicable to that the material that forms antiacid film TR at aluminium foil surface is phosphate (comprising trbasic zinc phosphate, ferric phosphate, manganese phosphate, calcium phosphate, chromium phosphate, titanium phosphate, phosphoric acid tin and phosphoric acid silicon), chromate (comprising chromic acid chromium, chromium phosphate and chromic acid silicon), fluoride (titanium fluoride and zinc fluoride).

Adhesion characteristic improves technology (after this referring to " coupling processing ") and comprises with coupling agent treatment aluminium foil surface and/or surface roughening processing.Be used for coupling agent treatment can with material be silane coupler, organic titanium coupling agent and organo-aluminium coupling agent.

The organic titanium coupling agent comprises four alkoxytitaniums, acidylate titanium, titanium chelate etc.The organo-aluminium coupling agent comprises tri-alkoxy aluminium, aluminium chelate compound, acidylate aluminium etc.

The aluminium foil surface roughening is the method that effective adhesion characteristic improves.That is, the aluminium foil surface quilt is with acid solution or aqueous slkali etching and cleaning, by removing the aluminium oxide (Al that forms at aluminium foil surface ₂O ₃) film, the surface of roughening aluminium foil, it is long-pending to increase aluminium foil surface, offers the aluminium foil surface anchorage effect, thereby improves the adhesion characteristic of aluminium foil surface.

Innermost layer 14 1 side surfaces of insulating course 12 can stand to use sulfuric acid solution, oxalic acid solution, thus the anodized of chromic acid solution or phosphoric acid solution and encapsulation process subsequently improve the acid-resisting of insulating course 12.

Can be by innermost layer 14 1 side surfaces to insulating course 12, on the formation surface of antiacid film TR or insulating course 12 inside are added silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, zinc oxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc and are further improved acid-resisting and the organic solvent resistance of insulating course 12 in innermost layer 14 1 sides.

Particularly, silicon dioxide, calcium carbonate, zinc chromate, barium potassium chromate and barium chromate zinc etc. can be with hydrogen fluoride (HF) thus reaction absorbs and absorption hydrogen fluoride, hydrogen fluoride is that electrolyte and reaction of moisture generate, especially, silicon dioxide, calcium carbonate, zinc chromate, barium potassium chromate and barium chromate zinc can also prevent that the insulating course (aluminium foil) that is caused by hydrogen fluoride from corroding.

Below the antiacid film, the adhesion characteristic that form on innermost layer 14 1 side surfaces to the formation, particularly insulating course 12 of relevant laminated structure 10 of the present invention improve to handle and form and absorb and the method for absorption corrosive substance layer is specifically described.These film build methods or processing etc. can be used separately or more than two by use in conjunction.

To innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or remove after the oxide that forms on this surface, can form the film that comprises at least a following material (after this refer to " corrosive substance absorbing film) on this surface, these materials are silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

Through after the degreasing or remove after the oxide that forms on this surface, on this surface, can form above-mentioned antiacid film to innermost layer 14 1 side surfaces of insulating course 12, can also further on this antiacid film, form the corrosive substance absorbing film.

On innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or removed after the oxide that forms on should the surface, on this surface, can form antiacid film, and a kind of can being added in the antiacid film in the following at least material, these materials are silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

On the surface of innermost layer 14 1 sides of insulating course 12, antiacid film can be formed, but also the corrosive substance absorbing film can be on the surface of this antiacid film, formed.

On the surface of innermost layer 14 1 sides of insulating course 12, can form antiacid film, and a kind of can being added in the antiacid film in the following at least material, these materials are silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

On the surface of the innermost layer 14 of insulating course 12, can also form film again, this film contains at least a in the following coupling agent material, and contain at least a in the following corrosive substance assimilate, described coupling agent material is silane coupled material, organic titanium coupling material and organo-aluminium coupling material, the assimilate of described corrosive substance is a silicon dioxide, calcium carbonate, zinc, the red lead, lead monoxide, the cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc, and can contain silicon dioxide, calcium carbonate, zinc, the red lead, lead monoxide, the cyanamide zinc-lead oxide, zinc chromate, at least a in barium potassium chromate or the barium chromate zinc.

On innermost layer 14 surfaces of insulating course 12, can form above-mentioned antiacid film, on this antiacid film, can contain in the following coupling material at least a, and contain at least a in the following corrosive substance assimilate, described coupling material is silane coupled material, organic titanium coupling material and organo-aluminium coupling material, described corrosive substance assimilate is a silicon dioxide, calcium carbonate, zinc, the red lead, lead monoxide, the cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc, and can contain silicon dioxide, calcium carbonate, zinc, the red lead, lead monoxide, the cyanamide zinc-lead oxide, zinc chromate, at least a in barium potassium chromate or the barium chromate zinc.

On the surface of innermost layer 14 1 sides of insulating course 12, can form antiacid film, can contain in the following coupling material at least a in the inside of antiacid film, and contain at least a in the following corrosive substance assimilate, described coupling material is silane coupled material, organic titanium coupling material and organo-aluminium coupling material, described corrosive substance assimilate is a silicon dioxide, calcium carbonate, zinc, the red lead, lead monoxide, the cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc, and can contain silicon dioxide, calcium carbonate, zinc, the red lead, lead monoxide, the cyanamide zinc-lead oxide, zinc chromate, at least a in barium potassium chromate or the barium chromate zinc.

After adopting degreasing on innermost layer 14 side surfaces of insulating course 12 or removing oxide on surface, on this surface, form the corrosive substance absorbed layer, and then, the acid resistance film can also be formed again.

, can on this surface, form antiacid film, and can on this antiacid film, form the corrosive substance absorbing film through after the degreasing or after having removed the oxide that forms on should the surface at innermost layer 14 1 side surfaces of insulating course 12.

At innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or after having removed the oxide that forms on should the surface, on this surface, can form antiacid film, and can be with at least a being contained in the antiacid film in the following material, these materials are silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

At innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or after having removed the oxide that forms on should the surface, on innermost layer 14 1 side surfaces of insulating course 12, the coupling processing film of forming by the coupling material can be formed, and on the coupling processing film, the corrosive substance absorbing film can be formed.

At innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or after having removed the oxide that forms on should the surface, on innermost layer one side surface of this insulating course, can form antiacid film, on antiacid film, can form the coupling processing film of forming by the coupling material, and on the coupling processing film, can form the corrosive substance absorbing film.

At innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or after having removed the oxide that forms on should the surface, on innermost layer 14 1 side surfaces of this insulating course 12, antiacid film can be formed, and on antiacid film, the corrosive substance absorbing film can be formed.

On innermost layer 14 1 side surfaces of insulating course 12, can form antiacid film, on the formation surface of antiacid film, can form film, this film contains in the following coupling material at least a, and contain at least a in the following corrosive substance assimilate, described coupling material is silane coupled material, organic titanium coupling material and organo-aluminium coupling material, and described corrosive substance assimilate is silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

On innermost layer 14 1 side surfaces of insulating course 12, can form antiacid film, and contain at least a in silane coupled material, organic titanium coupling material and the organo-aluminium coupling material in the inside of this acidproof film, and can also form the film that contains at least a following material on antiacid film, these materials are silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

At innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or after having removed the oxide that forms on should the surface, on this surface, can form antiacid film, can also on antiacid film, form film in addition, this film contains at least a in the following coupling material, and contain at least a in the following corrosive substance assimilate, described coupling material is silane coupled material, organic titanium coupling material and organo-aluminium coupling material, described corrosive substance assimilate is a silicon dioxide, calcium carbonate, zinc, the red lead, lead monoxide, the cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

At innermost layer 14 1 side surfaces of insulating course 12 through after the degreasing or after having removed the oxide that forms on should the surface, on this surface, can form film, this film comprises in the following film at least a and contain in the following material at least a, these films are phosphate layer, chromate film, fluoride films and triazine sulfhydryl compound film, and these materials are silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc.

Protective layer 15 of the present invention be the adhesion characteristic that causes for the corrosion that prevents insulating course 12 with owing to solvent degenerate is provided with by resin constitute layer, and protective layer 15 is set at the surface of innermost layer 14 1 sides of above-mentioned insulating course 12.Protective layer 15 can comprise antiacid modifier and/or above-mentioned coupling agent.

What be used to form protective layer 15 can use epoxy resin; phenol resin; melamine resin; alkyd resins; polyimide resin; unsaturated polyester resin; polyurethane resin; the unsaturated carboxylic acid graft vistanex; conjugated polyester resin (comprising pet copolymer and polybutylene terephthalate (PBT) copolymer); the metal ion crosslinked polyvinyl resin; ethylene-vinyl acetate copolymer; ethylene-acrylic acid copolymer; ethylene-methacrylic acid copolymer; poly-(ether urethane) resin of etc.ing with comprise in the above resin modified thing at least a and content at the resin more than 30% etc.

Can also comprise aforesaid film-forming type phosphate (trbasic zinc phosphate, ferric phosphate, manganese phosphate, calcium phosphate, chromium phosphate, chromic acid silicon) in these protective layers 15; can also comprise film-forming type fluoride (titanium fluoride, zinc fluoride); can also comprise the material that is used to improve the aluminium foil surface adhesion characteristic, i.e. coupling agent such as silane coupler, organic titanium coupling agent or organo-aluminium coupling agent.

In protective layer 15, suitably add silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc and can further strengthen the chemical proofing and the solvent resistance of protective layer 15 simultaneously effectively.Particularly silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc can be with hydrogen fluoride (HF) thus reaction absorbs and absorption hydrogen fluoride; hydrogen fluoride is that electrolyte and aqueous vapor reaction generate; silicon dioxide, calcium carbonate, zinc chromate, barium potassium chromate and barium chromate zinc can also prevent to cause each layer by hydrogen fluoride, particularly protective layer and insulating course (aluminium foil) corrosion.

In addition, the processing of innermost layer 14 1 sides of the insulating course 12 of the laminated structure 10 among the present invention can aforesaid each surface treatment of compound use.For example,

(1) the antiacid film of aluminium foil/surface roughening/form

(2) aluminium foil/surface roughening/coupling agent treatment

(3) aluminium foil/surface roughening/formation protective layer

(4) the antiacid improved properties film of aluminium foil/formation/formation protective layer

(5) the antiacid film/coupling agent treatment of aluminium foil/form

(6) aluminium foil/surface roughening/form antiacid film/formation protective layer

(7) the antiacid film/coupling agent treatment of aluminium foil/surface roughening/form

According to the present invention; except comprising the resin bed of antiacid modifier and/or coupling agent; the second protective layer 15a that is made up of resin (as epoxy resin, phenol resin, melamine resin, olefin resin or unsaturated carboxylic acid graft vistanex) be can also form, antiacid modifier and/or coupling agent do not contained in this resin bed.

Below be the example of the formation method of the second protective layer 15a, for example,

(1) aluminium foil/form antiacid Modified Membrane/formation second protective layer

(2) aluminium foil/coupling agent treatment/formation second protective layer

(3) aluminium foil/surface roughening/formation second protective layer

(4) aluminium foil/surface roughening/formation protective layer/formation second protective layer

(5) aluminium foil/surface roughening/form antiacid film/formation second protective layer

(6) aluminium foil/surface roughening/coupling agent treatment/formation second protective layer

(7) aluminium foil/form antiacid Modified Membrane/formation protective layer/formation second protective layer

(8) aluminium foil/form antiacid film/coupling agent treatment/formation second protective layer

(9) aluminium foil/surface roughening/form antiacid Modified Membrane/formation protective layer/formation second protective layer

(10) aluminium foil/surface roughening/form antiacid film/coupling agent treatment/formation second protective layer

In the antiacid film that forms on the innermost layer 14 1 side inner surfaces of these aluminium foil layers; in the protective layer; can contain in the following material one or more in the coupling agent treatment layer and second protective layer; these materials are phosphate film forming class materials (trbasic zinc phosphate, ferric phosphate, manganese phosphate, calcium phosphate and chromium phosphate); chromic acid film forming class material (chromic acid chromium and chromic acid silicon); the adhesion characteristic of fluoride film forming class material (titanium fluoride and zinc fluoride) and each layer improves material (coupling agent: silane coupler, organic titanium coupling agent and organo-aluminium coupling agent).In addition, add chemical reagent resistance and the organic solvent resistance that silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc can further strengthen this layer effectively aptly.Particularly silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc can be with hydrogen fluoride (HF) thus reaction absorbs and absorption hydrogen fluoride, hydrogen fluoride is that electrolyte and aqueous vapor reaction generate, silicon dioxide, calcium carbonate, zinc chromate, barium potassium chromate and barium chromate zinc can also prevent the corrosion of these layers of being caused by hydrogen fluoride, can prevent that particularly insulating course (aluminium foil) is corroded.

According to the present invention, intermediate layer 13 can be sandwiched between insulating course 12 and the innermost layer 14, or between protective layer 15 and the innermost layer 14.By intermediate layer 13 is set; on the one hand can protect insulating course 12, and can prevent to come in contact (short circuit) because innermost layer 14 is electrode 3 and the aluminum insulating course 12 that thermal adhesive layer attenuation (owing to using heat and pressure to cause in the hot sealing process when forming bag) causes.The intermediate layer 13 in addition, for the ability (thermal endurance and cold resistance) that the stabilize lithium battery conforms can be by laminationization.Preferably, intermediate layer 13 comprise at least one layer thickness be more than the 10 μ m better in 12 to 25 mu m ranges, fusing point is mylar, vistanex, the fluorocarbon resin more than 80 ℃, or the resin bed of the mixture of the modifier of these resins or these resins formation.

Can enumerate as mylar:

(1) pet resin,

(2) polybutylene terephthalate (PBT) resin,

(3) PEN resin,

(4) PBN resin,

(5) polycarbonate resin, and the modifier of the copolymer of these resins and these resins.

In addition, as vistanex is adducible acrylic resin is arranged, ethylene-propylene copolymer, ldpe resin, the medium density polyethylene resin, high-density polyethylene resin, linear low density polyethylene resin, ethene-alpha-olefin copolymer (using the single-point catalyst polymerization to obtain), polyvinyl resin (containing metal ion), ethylene-methyl methacrylate derivative and ethylene-propylene acid derivative copolymer, polybutene resin, the unsaturated carboxylic acid graft polyvinyl resin, the unsaturated carboxylic acid graft acrylic resin, the modifier of unsaturated carboxylic acid graft polymethylpentene resin and these resins.

In addition, as fluorocarbon resin is adducible tetrafluoroethylene resin, trifluoro-ethylene resin, polyvinylidene fluoride resin, polyfluoroethylene resin, ethylene tetrafluoroethylene copolymer, polymonochlorotrifluoroethylene, ethene-one chlorotrifluoroethylcopolymer copolymer and tetrafluoraoethylene-hexafluoropropylene copolymer etc. are arranged.Can use the at will any of the orientation of these resins or non-state of orientation.

Intermediate layer 13 can be single layer structure or sandwich construction.Intermediate layer 13 as multiple stratification can be made up of the first intermediate layer 13a and the second intermediate layer 13b.When making intermediate layer 13 multiple stratifications, can its lamination be formed, in addition, also can each layer laminate be got up, can also carry out the intermediate layer 13 that lamination forms sandwich construction with the extruding lay-up method with dried lay-up method by coetrusion.For example, when forming the intermediate layer 13 of multiple stratification by coetrusion, intermediate layer 13 can be as being made up of plural sublayer shown below, and the thickness of each sublayer is preferably in 10 to 100 mu m ranges, in 15 to 25 mu m ranges.

The innermost layer 14 of the material that is used for packaging lithium battery among the present invention, shown in Fig. 4 (e), when the innermost layer 14 of laminated body has heat sealability each other, also show heat sealability for metal as electrode 3, and for found that the material of the deterioration not of never degenerating because of content is inquired into, more than the thickness 10 μ m, be preferably in 50 to 100 mu m ranges, fusing point is more than 80 ℃, Vicat softening point is that the unsaturated carboxylic acid graft vistanex that contains more than 70 ℃ (comprises the unsaturated carboxylic acid graft polyvinyl resin, unsaturated carboxylic acid graft acrylic resin and unsaturated carboxylic acid graft polymethylpentene resin), the metal ion crosslinked polyvinyl resin, ethylene-propylene acid derivative copolymer, propylene-acrylic acid copolymer derivative thing, ethylene-methyl methacrylate derivative copolymer, propylene-methacrylic acid derivative copolymer, and the innermost layer 14 of at least a formation in the modifier of these polymer shows good result.

Innermost layer 14 can be by vistanex 14 ' form, and this vistanex can not be adhered on the metal.When innermost layer by vistanex 14 ' when forming, between electrode 3 and the innermost layer 14 be Thermoadhesive tab 16 (this tab is formed by unsaturated carboxylic acid graft polyolefin, metal ion crosslinked polyvinyl resin, ethylene-propylene acid derivative copolymer, propylene-acrylic acid copolymer derivative thing, ethylene-methyl methacrylate derivative copolymer, propylene-methacrylic acid derivative copolymer) more than the 15 μ m, thereby tab 16 and external packing can be bonded together fully and can be sealed by used thickness.More particularly, the heat bonding that is packaged in the joint 3 of the lithium battery main body 2 in the battery packages shown in Fig. 4 (b) partly is carried with the Thermoadhesive tab 16 than electrode fabric width, and is inserted into and carries out the heat bonding sealing in the battery external packing body.Fig. 4 (d) is that expression is along the line X among Fig. 4 (a) ₄-X ₄The simulated section view of being done (still, in Fig. 4 (d), outermost layer 11, insulating course 12 and intermediate layer 13 are represented with individual layer).Fig. 4 (c) shows in addition is that heat bonding part package at electrode 3 has Thermoadhesive tab 16 and inserts the example that the heat bonding sealing is carried out in external packing.Fig. 4 (e) and Fig. 4 (d) with identical modal representation along the line X among Fig. 4 (a) ₄-X ₄The cross section view of being done.

Innermost layer 14 in the laminated body of the present invention can be the single layer structure that is made of above-mentioned resin, in addition, also can be the two-layer above sandwich construction that contains above-mentioned resin.

But the adhesiveness of unsaturated carboxylic acid graft vistanex and electrode 3, thermal endurance, cold resistance and flexibility (adaptability) of operation (being easy to make packing bag and concave-convex type die pressing mouldability) are all fine.When the thickness of innermost layer 14 during less than 20 μ m, the gapped battery packages that makes of its end sections has been lost barrier character packaging material and electrode 3 heat-sealings the time.In addition, when making the thickness of innermost layer 14 surpass 100 μ m, the heat-seal bond intensity between the innermost layer 14 that is heat-sealed is constant, but increases as the thickness of laminated structure 10, does not save the installing space purpose thereby meet the present invention.

When the material of forming innermost layer 14 had low fusing point and low excessively Vicat softening point, innermost layer 14 did not have thermal endurance, cold resistance, each film that makes innermost layer 14 each other and and electrode 3 between bonding strength step-down and packaging bag may break.Though can use aforesaid unsaturated carboxylic acid graft polymer separately, have gratifying characteristic by mixing the material that these unsaturated carboxylic acid graft polymer obtain.

For improve and stable laminated structure of the present invention 10 above-mentioned each form the secondary processing behaviour (concavo-convex compression molding and bag) of applicability, film shaping characteristic, lamination processing characteristics and the final products of layer, form layer and can stand the surface activation PROCESS FOR TREATMENT, as Corona discharge Treatment, inject process, oxidation processes or ozonation treatment etc.

Can form also outermost layer 11, insulating course 12, intermediate layer 13 and the innermost layer 14 of lamination laminated structure 10 of the present invention by T pattern extrusion, inflatable method or coetrusion.When needs, can pass through coating process, vapour deposition method, ultraviolet curing or electronic beam curing etc. and form the secondary film.

Can and fit to by can be adjacent layer bonding of dried lay-up method, extruding lay-up method, coextrusion lay-up method or heat laminating method and carry out lamination together.

As mentioned above, when carrying out dried lamination, can use the various adhesive DL of polyester binder, polyethylene-imines adhesive, polyethers adhesive, cyanoacrylate adhesive, urethane adhesives, organic titanic compound adhesive, polyethers-urethane adhesives, epobond epoxyn, polyester urethane adhesives, acid imide adhesive, isocyanate adhesive, polyolefin-based adhesive and silicone adhesive.

Be that silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or the barium chromate zinc of the applicability of feature is added into the adhesive that is used for dried lamination to contain at least a in silicon dioxide, calcium carbonate, zinc, red lead, zinc impregnation lead, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or the barium chromate zinc simultaneously for what further improve chemical reagent resistance and organic solvent resistance.Particularly, silicon dioxide, calcium carbonate, zinc, red lead, zinc impregnation lead, zinc oxide, cyanamide lead oxide, zinc chromate, barium potassium chromate and barium chromate zinc etc. can be with hydrogen fluoride (HF) thus reaction absorbs and absorption hydrogen fluoride, hydrogen fluoride is that electrolyte and reaction of moisture generate, therefore can also prevent the corrosion of these layers of causing by hydrogen fluoride, particularly prevent the corrosion of insulating course (aluminium foil).

In addition, when by the extruding lamination, carry out the promotion method of the adhesion strength of each bonding interlayer as stabilisation, can use polyester binder, polyethylene-imines adhesive, the polyethers adhesive, cyanoacrylate adhesive, urethane adhesives, the organic titanic compound adhesive, polyethers-urethane adhesives, epoxy adhesive, polyester-urethane adhesives, the acid imide adhesive, isocyanate adhesive, the adhesive resin of the modifier of polyolefin-based adhesive and silicone adhesive and these adhesives or the mixture of these adhesives etc. is applied as the film of thick about 1 μ m, perhaps allows these layers stand to be used for the ozonation treatment that surface activation is handled.

Unsaturated carboxylic acid graft vistanex when being used for coextrusion lamination or heat laminating is when having improved adhesion characteristic and improved the ability of the inner stuffing of anti-packing side effect.

Embodiment

Formation embodiment as the aforementioned laminated structure of the present invention of packaging bag build and concavo-convex mold pressing packaging box type will specifically disclose below.

The composition that is configured for the adhesive of dried lamination and dried lamination DL in the above-described embodiments is as described below.

Dried lamination DL between outermost layer and the insulating course: adhesive contains polyether resin as main component Takerakku A-969V/A-5[Takede Chemical Industries Ltd system, trade name].

Dried lamination DL between insulating course and the intermediate layer: suitable constituent is, as the polyester polyurethane resin of main component is by carboxylic acid such as decanedioic acid, M-phthalic acid, terephthalic acid (TPA), with glycol such as ethylene glycol or hexylene glycol, and the epoxy resin of isocyanates (IPDI) and bisphenol-A formation constitutes, in addition, as curing agent, as trimethylolpropane, glycol such as propylene glycol, DPG, glycerol or 1,3-butanediol, isocyanates (TDI) or TDA.

Following breviary symbol is used in thereafter the description.

The breviary symbol that the insulating course surface treatment is relevant

Tr-W: degreasing or remove oxide (condition is 55 ℃, alkali degreasing after 1 minute in the IN NaOH solution, the salpeter solution pickling with 35%)

Tr-Cou: coupling agent treatment

Tr-Ac: phosphate treatment

Tr-POa: coating unsaturated carboxylic acid graft polyolefin and drying

Tr-Co-Ac-cr: handle with the chromium phosphate acid solution that contains calcium carbonate

Be other breviary symbol below.

PET: polyester, Ny: nylon, AL: aluminium foil, PPa: unsaturated carboxylic acid graft polypropylene, PEA: unsaturated carboxylic acid graft polyethylene, P-EP: the protective layer, the RAM-PP that constitute by epoxy resin: the polypropylene of atactic polymerization, HOMO: the polypropylene of homopolymerization type polymerization

Method for making as packaging bag

Embodiment 1

The thick aluminium foil of 20 μ m is by degreasing and remove the oxide that the surface forms.Thereby form lamination A on the above-mentioned aluminium foil by dried lay-up method bonding being attached to of double axial orientated polyester film that 12 μ m are thick of using binder film DL-1 then.Thereby obtain laminated structure (1) on the aluminium foil surface that double axial orientated polyester film that the dried lay-up method by using binder film DL-2 is thick with 12 μ m and the thick unsaturated carboxylic acid graft polypropylene screen of 50 μ m are laminated to lamination A in order.Be used to form the laminated structure of packing bag.

Laminated structure (1): PET (12)/DL-1/AL (20) Tr-W/DL-2/PET (12)/DL-2/PPa (50)

Embodiment 2

After the aluminium foil that 20 μ m are thick is eliminated by the oxide of degreasing and surface formation, on aluminium foil, forms the anti-oxidant treatment film thereby aluminium foil stands phosphate treatment, and on this anti-oxidant treatment film, form coupling characteristic raising film.By the dried lamination that uses binder film DL-1 the thick double axial orientated polyester film of 12 μ m is laminated to aluminium foil (scribble the coupling characteristic and improve film) then thereby formation lamination A on the surface.Thereby double axial orientated polyester film that unsaturated carboxylic acid graft polypropylene screen, 12 μ m that the dried lay-up method by using binder film DL-1 is thick with 20 μ m are thick and the thick unsaturated carboxylic acid graft polypropylene screen of 50 μ m are laminated to and obtain lamination B together.By the heat laminating method, thus the bonding laminated structure (2) that obtains of the aluminium foil surface of the thick unsaturated carboxylic acid graft polypropylene screen of 20 μ m of lamination B and lamination A, the condition of heat laminating method is temperature: 220 ℃, and pressure: 0.3MPa, linear velocity: 20m/min.

Laminated structure (2): PET (12)/DL-1/AL (20) Tr-Ac/Tr-Cou/TL/PPa (20)/DL-2/PET (12)/DL-2/PPa (50)

Embodiment 3

After the aluminium foil that 20 μ m are thick is eliminated by the oxide of degreasing and surface formation, handle and on aluminium foil, to form antiacid film thereby aluminium foil stands chromate again, by the dried lay-up method that uses binder film DL-1 the thick double axial orientated polyester film of 12 μ m is laminated to aluminium foil (scribble the coupling characteristic and improve film) thus a surface on form lamination A.On another surface of the aluminium foil of above-mentioned lamination A, form protective layer by epoxy resin.In addition; carry out coextrusion system film by coetrusion to forming random polypropylene and homo-polypropylene, thereby and the dried lay-up method by use binder film DL-2 the random polypropylene face of co-extruded films is adhered on the above-mentioned alkyd resins protective layer of lamination A and obtains laminated structure (3).

Laminated structure (3): PET (12)/DL-1/AL (20) Tr-Cr/P-EP/DL-2/RAM-PP (5)/HOMO-PP (25)

Be used to form the method for making of the laminated structure of concavo-convex mold pressing packing

Embodiment 4

After the aluminium foil that 50 μ m are thick is eliminated by the oxide of degreasing, aluminium foil surface, behind the coating unsaturated carboxylic acid graft polyolefin formation baking-curing processing layer (on the two sides of aluminium foil, forming).Thereby the dried lay-up method by using adhesive phase DL-1 is laminated to surface of aluminium foil with the thick double axial orientated polyester film of 12 μ m and the thick double axial orientated polyester film of 52 μ m is laminated on the thick above-mentioned aluminium foil of 50 μ m obtains lamination A.Thereby the dried lamination by using adhesive phase DL-2 is laminated to another surface of aluminium foil among the lamination A and the unsaturated carboxylic acid graft polyethylene film that 50 μ m are thick with the thick polyester film of 16 μ m and is laminated on the thick polyester film of 16 μ m and obtains laminated structure (4).

Laminated structure (4): PET (12)/DL-1/Ny (15)/DL-1/AL (50) Tr-POa/DL-2/PET (16)/DL-2/PEa (50)

Embodiment 5

After the oxide that the aluminium foil that 50 μ m are thick is formed by degreasing, aluminium foil surface is eliminated, thereby innermost layer one side surface stands phosphate treatment after forming antiacid film on the aluminium foil.On above-mentioned antiacid film (being formed on the surface of aluminium foil) surface, form the thick unsaturated carboxylic acid graft polyethylene film of 5 μ m by coating method.Be laminated on the another one surface of aluminium foil by the dried lay-up method biaxial oriented nylon film that 15 μ m are thick that uses binder film DL-1 and thereby the thick double axial orientated polyester film of 12 μ m is laminated on the thick biaxial oriented nylon film of 15 μ m and obtains lamination A.Thereby biaxial orientation copolyester film that the dried lay-up method by using binder film DL-2 is thick with 16 μ m and the thick unsaturated carboxylic acid graft polyethylene film of 50 μ m are laminated into and obtain lamination B together.By using the extrusion coating method (EC method) of 20 μ m thick polyethylene films, form laminated structure (5) thereby the thick biaxial orientation copolyesters of the 16 μ m face of the aluminium foil surface of lamination A and lamination B is bonded together.

Laminated structure (5): PET (12)/DL-1/Ny (15)/DL-1/AL (50) Tr-PAc/PEa (5)/PE (20)/PET (16)/DL-2/PEa (50)

Embodiment 6

The thick aluminium foil of 50 μ m is by degreasing, after the oxide that forms on the aluminium foil surface is eliminated, handles form antiacid film on aluminium foil thereby use chromium phosphate calciferous that aluminium foil is carried out surface acid.By the dried lay-up method that uses binder film DL-1 the thick double axial orientated polyester film of 12 μ m is laminated on the surface of aluminium foil and the biaxial oriented nylon (NY) that 15 μ m are thick thus film is laminated on the thick double axial orientated polyester film of 12 μ m and obtains lamination A.In addition, form the co-extruded films of random polypropylene film and homo-polypropylene film by coetrusion.Thereby the random polypropylene face in the above-mentioned co-extruded films is adhered on the aluminium foil surface of lamination A by the dried lay-up method that uses adhesive phase DL-2 then and obtains laminated structure (6).

Laminated structure (6): PET (12)/DL-1/Ny (15)/DL-1/AL (50) Tr-Co-PAc-cr/DL-2/RAM-PP (5) //HOMO-PP (25)

Use above-mentioned laminated structure (1) to arrive (6), and the lithium battery body seal is got up as packaging material for lithium battery.And this sample lithium battery tested.The result shows that the stromatolithic structure physical efficiency satisfies the requirement of lithium battery packing satisfactorily.

Laminated structure of the present invention and can prevent the delamination of peeling off of insulating course innermost layer one side surface corrosion that hydrofluoric acid causes and laminated structure by its packaging material for lithium battery that forms effectively.Packaging material for lithium battery has good barrier character, can keep barrier character satisfactorily for a long time, has good thermal endurance, cold resistance, the characteristic of good anti-packing filler ill-effect etc.

The 4th embodiment

Various details the 4th embodiment.Second embodiment of explanation is just different on the structure of laminated structure among the 4th embodiment and Fig. 7 to 9, and other and embodiment 2 are roughly the same.Therefore, describe the 4th embodiment, will represent and such description will be omitted with identical reference marks with part similar or corresponding in second embodiment with reference to Fig. 7 to 9.

To shown in 7 (e), insulating course 12 is to prevent that steam especially from penetrating into the layer of the inside of lithium battery 1 from the outside as Fig. 7 (a).In order to prevent the ill-effect of the pin hole of formation in the simple insulating course 12, also in order to stablize machinability (being easy to make bag or concavo-convex compression molding), and in order to make insulating course 12 have anti-pinhole characteristics, insulating course 12 is that metal (as aluminium or the nickel etc.) paper tinsel more than the 15 μ m or the film of inorganic compound (as silicon dioxide or aluminium oxide etc.) form by thickness.Preferably, insulating course 12 is thickness soft aluminium foils at 20 to 80 mu m ranges.

How the inventor is to more effectively preventing to form pin hole, and the type that prevents the external packing of lithium battery is when making the packing box of compression molding, its mold pressing partly forms the problem of crackle and studies, and find when the material of the aluminium foil that forms insulating course 12 selects for use iron content in 0.3 to 9.0% scope, this aluminium foil than nonferrous aluminium foil more superior aspect the ductility, thereby and the laminated structure with this aluminium foil insulating course when being bent, be difficult for forming pin hole and being carried out the container that concave-convex type die pressing is formed with sidewall easily.Iron content is less than 0.3% aluminium foil and is preventing that pin hole from forming and improving not effect aspect the formability.Iron content surpasses 9.0% aluminium foil hardening and damage the machinability of laminated structure when making bag.

On the other hand,, in the majority as the aluminium foil of packaging material with the situation that other material laminate uses as material with barrier character.But compare with other metal, aluminium more is subject to organic solvent, the influence of the corrosivity effect of bronsted lowry acids and bases bronsted lowry.Most of lithium batteries all contain organic solvent, as ethylene carbonate, propylene carbonate, diethyl carbonate, dimethyl carbonate or acetone etc. in active material in the lithium battery main body and the polyelectrolyte.In addition, the reaction of lithium salts that contains in the polymer dielectric and water produces a kind of strong acid, i.e. hydrogen fluoride (HF).When aluminium foil surface during by these organic solvents and acid corrosion, the bonding strength between aluminium foil and innermost layer or the intermediate layer descend and the laminated structure of the packaging material of lamination be stripped from delamination, the packaging material laminated structure has been lost its function.

The inventor finds by various tests, and by antiacid shown in Fig. 7 (b) of coating on aluminium foil, the resin bed of anti-solvent the (after this referring to " protective layer 15 ") can prevent that aluminium foil surface is corroded.Find unexpectedly that also protective layer 15 not only comprises aluminium foil surface, but also have both the adhesiveness with intermediate layer 13.

According to the present invention; the suitable material that is used to form protective layer 15 (being coated on the aluminium foil) is a resin; can enumerate particularly; comprise that one deck is by containing epoxy resin (EP) at least; phenol resin (FU); melamine resin (M); alkyd resins (AK); polyimide resin (PI); unsaturated polyester resin (U-PET); polyurethane resin (PU); unsaturated carboxylic acid graft vistanex (POa); conjugated polyester resin (Co-PET) (as pet resin copolymer and polybutylene terephthalate (PBT) resin copolymer etc.), ionomer (Io), vinyl-vinyl acetate copolymer (EVA); ethylene and acrylic acid copolymer; copolymer from ethylene and methacrylic acid (FMA), the resin bed that at least a resin in the modifier of polyethers-urethane resin (PeU) etc. and these resins constitutes, and these resin contents are more than 30%.

Below above-mentioned protective layer 15 is described.

For example has following structure as packaging material for lithium battery.

PET(12)<D ₅>AL(20)/H/<D ₅>/PP(100)

[breviary symbol: PET: polyester film, D ₅: representative dried stack membrane, the AL of polyester-urethane adhesives: aluminium foil, H: represent protective layer, PP to represent polypropylene screen, the numeral behind the breviary symbol is bed thickness (μ m)].

The protective layer H that forms on the aluminium foil AL surface can be an individual layer, the lamination that can be made up of a plurality of sublayers or the layer of being made up of composite material.

Below, about the material title of protective layer with the record of breviary symbol, and as the breviary symbol of the relevant layer method of formationing, for example, multilayer be "/", mixed layer for "+", heat laminating method be that "＜TL〉", extrusion molding are "＜EC〉".

The specifiable material that is used to form single ply protective layer 15 is EP resin, FU resin, M resin, PI resin, AK resin, U-PET resin, PU resin, PEU resin, PeU resin and POa resin etc.

It below is structure as the protective layer that constitutes by multilayer.

EMA/<EC>EMA

Io<EC>Io

EVA<EC>EVA

POa<TL>

EP/POa<EC>

EP/EAM/<EC>EMA

PI/Co-PET

U-PET/Io

PU/EVA<EC>EVA

POa/EP/POa<EC>

List Deng can be used as instantiation.

It below is the example that is used to form the blending resin that to enumerate of protective layer 15.

EP+M

EP+FU

EP+Co-PET

EP+POa<TL>

EP+M+Co-PET

PU+Co-PET

EP+M+FU。

It below is the example when making the multi-protective layer 15 that contains the blending resin sublayer.

EP+M/POa<TL>

EP+Co-PET/EAM<EC>

EP+Co-PET/EAM

EP+Co-PET/POa<EC>

EP+FU/PU+Cp-PET etc.

In addition, the adhesive that can also mix above-mentioned resin and layer formation use is as protective layer 15, but this occasion example has:

EP+PEU

EP+PaU

EP+M+PEU

POa+PEU etc.

Shown in Fig. 7 (b), can form between insulating course 12 and the protective layer 15 silane coupler resin bed 27 as primary coat so that improve adaptation between insulating course 12 and the protective layer 15.

Except passing through the roll coating method (as the gravure coating method; reverse gravure coating method; the vane type coating method; the kiss-roll coating method) beyond formation protective layer 15 on the insulating course 12; can also will pass through the extrusion coating of T pattern on insulating course 12 surfaces as protective layer 15; perhaps,, by heat bonding this film is laminated on the protective layer 12 then as the film of protective layer by inflatable method, T pattern method or coetrusion formation.When forming protective layer 15 by the roll coating method, can also use methods such as ultraviolet curing or electronic beam curing.When needs, protective layer 15 can be by the processing of baking-curing in 150 to 250 ℃ of temperature ranges.This occasion not only can be carried out baking-curing to each individual layer, but also can toast after the multiple stratification, so more can strengthen plunger bond strength.

Formation method as protective layer 15; it is thick to form 0.5 to 10 μ m on insulating course 12 surfaces by extrusion molding; preferred 1 to 30 μ m is thick, and contains content at the epoxy resin more than 30%; polyimide resin; unsaturated polyester resin; alkyd resins; phenol resin; thermosetting acrylic resin; polyamide; fluorocarbon resin; the unsaturated carboxylic acid graft vistanex; pet copolymer; the polybutylene terephthalate (PBT) copolymer; polyester-vinyl-vinyl acetate copolymer; polyester-polystyrene copolymer; ionomer; the copolymer of ethene and acrylic acid derivative; at least a resin coating in the copolymer of ethene and methacrylic acid derivative.In addition, after the fraction (for example disperseing coating process) of above-mentioned substance can also being applied, form protective layer 15 in the heat treated that imposes under 200 ℃ more than 10 seconds.

Dried lamination by using dried lamination layer 26 can be with protective layer 15 and intermediate layer 13, or protective layer 15 and innermost layer 14 are bonded together.This occasion can be carried out lamination at polyethers-urethane resin, polyester-urethane resin, isocyanate resin, vistanex, polyethylene-imide resin, cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin or the silicone resin of 1 to 10 mu m range with thickness as the lamination layer.

Get involved protective layer 15 and intermediate layer 13 by the packaging material that use the said structure that constitutes by resin bed; or be bonded together between protective layer 15 and the innermost layer 14 and with their heat laminatings; used resin bed is to contain in thickness 1 to 50 mu m range; fusing point is more than 80 ℃, and Vicat softening point is unsaturated carboxylic acid graft polypropylene or the unsaturated carboxylic acid graft polymethylpentene more than 70 ℃.According to said method; can improve between insulating course 12 and the intermediate layer 13; saying more accurately, is the bonding strength that improves between protective layer 15 and the intermediate layer 13, and the thermal endurance of laminated structure and cold resistance are enhanced and can prevent that the laminated structure in the secondary operations technology from decomposing delamination.

In the formation of above-mentioned protective layer 15, above-mentioned the whole bag of tricks can use separately, also can multiple and usefulness.

By between insulating course 12 and protective layer 15, forming silane coupling agent layer, can strengthen the bonding strength between insulating course 12 and the protective layer 15, improve adaptation.

According between the insulating course 12 of the laminated body of packaging material for lithium battery of the present invention and the innermost layer 14 intermediate layer 13 being set.Intermediate layer 13 protection insulating courses 12 and preventing because innermost layer 14 is electrode and the aluminum insulating course 12 that thermal adhesive layer attenuation (using heat and pressure to cause owing to form in the hot sealing process of bag) causes comes in contact.In addition, the ability (thermal endurance and cold resistance) that can stable cell conforms by lamination intermediate layer 13.More than 10 μ m, fusing point is more than 80 ℃ by the thickness of lamination in intermediate layer 13.Preferably, intermediate layer 13 comprises the film that one deck at least is made up of following material, and these materials are the modifier of mylar, vistanex, fluorocarbon resin or these resins or the blending resin of these resins.The mylar that is used to form intermediate layer 13 is the copolymer of pet resin, polybutylene terephthalate (PBT) resin, PEN resin, PBN resin, polycarbonate resin and these polymer and the modifier of these polymer.The vistanex that is used to form intermediate layer 13 is an acrylic resin, ethylene-propylene copolymer, ldpe resin, the medium density polyethylene resin, high-density polyethylene resin, linear low density polyethylene resin, ethene-alpha-olefin copolymer (using the single-point catalyst polymerization to obtain), the polyvinyl resin that contains metal ion, ethene and methacrylic acid derivative copolymer, with ethylene-propylene acid derivative copolymer, polybutene resin, the unsaturated carboxylic acid graft polyethylene, the unsaturated carboxylic acid graft polypropylene, the modifier of unsaturated carboxylic acid graft polymethylpentene resin and these polymer.In addition, the fluorocarbon resin that is used to form intermediate layer 13 is a tetrafluoroethylene resin, the trifluoro-ethylene resin, polyvinylidene fluoride resin, polyfluoroethylene resin, ethylene-tetrafluoroethylene resin, poly--daiflon, ethene-chlorine fluoride copolymers or tetrafluoraoethylene-hexafluoropropylene copolymer etc.Can use the orientation or the non-alignment films of these resins.

Usually, intermediate layer 13 or the outermost layer 11 that is formed by mylar makes that forming lithium battery compression molding packing box becomes difficulty.But be to use pet copolymer or polybutylene terephthalate (PBT) copolymer to replace mylar to make that the transfiguration of formation lithium battery compression molding packing box is easy.

When in the laminated body 10 of packaging material for lithium battery of the present invention intermediate layer 13 being set, intermediate layer 13 can be made up of the sublayer more than two or three, and this occasion in each sublayer thickness from 10 to 100 mu m range, is preferably in from 15 to 25 mu m ranges.

For example, following formation can be enumerated during as 2 layers in intermediate layer 13.

(1) unsaturated carboxylic acid graft polyethylene/HDPE

(2) unsaturated carboxylic acid graft polypropylene/PP (fusing point: more than 120 ℃, be preferably more than 135 ℃

(3) unsaturated carboxylic acid graft polymethylpentene resin/polymethylpentene (fusing point: more than 120 ℃, be preferably more than 135 ℃), HDPE or PP

(4) PEA or PPA/PMa resin (two-layer)

(5) PEA or PPA/PMa resin/PEA or PPA (three layers)

(6) PEA or PPA/PMa resin/PMa resin (three layers)

(7) PEA or PPA/PMa resin/TPX/PMa resin (four layers)

(8) PEA or PPA/PMa resin/TPX/PMa resin/PEA or PPA (five layers)

(9) PEA or PPA/PMa resin/PEA or PPA (three layers)

(more than: PEA, PPA, PMa, TPX are respectively unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene, unsaturated carboxylic acid graft polymethylpentene resin, polymethylpentene)

In addition, intermediate layer 13 is when containing the formation more than 3 layers of adhesive linkage, can be exemplified below.This occasion, each layer thickness are 10～100 μ m, preferred 15～25 μ m.

(1) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/HDPE

(2) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/PP (fusing point: more than 120 ℃, be preferably more than 135 ℃)

(3) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/polymethylpentene

(4) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/unsaturated carboxylic acid graft polymethylpentene (fusing point: more than 135 ℃, Vicat softening point: more than 110 ℃)

(5) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/orientation PETG

(6) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/polybutylene terephthalate (PBT)

(7) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/PEN

(8) unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene/fluorocarbon resin

(9) any in unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene or the unsaturated carboxylic acid graft polymethylpentene/HDPE, PP, polymethylpentene, unsaturated carboxylic acid graft polymethylpentene resin, orientation PETG, polybutylene terephthalate (PBT), PEN or fluorocarbon resin/unsaturated carboxylic acid graft polyethylene, any in unsaturated carboxylic acid graft polypropylene or the unsaturated carboxylic acid graft polymethylpentene, or the like.Be used for the sublayer, intermediate layer and be bonded together multiple stratification, and can form by polyethers-urethane resin, polyester-urethane resin, isocyanate resin, vistanex, polyethylene-imide resin, cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin, silicone resin with the adhesive phase of symbol/representative.

Preferably, the innermost layer 14 of packaging material for lithium battery laminated structure of the present invention preferably uses has following feature, that is, and and when innermost layer 14 has heat-sealing bonding each other, metal for electrode 3 also shows heat sealability, and is not because of content goes bad, the material of deterioration.As such material, preferably thickness is more than the 10 μ m, be preferably in 50 to 100 mu m ranges, fusing point is more than 80 ℃, Vicat softening point is more than 70 ℃, by the unsaturated carboxylic acid graft vistanex, form as unsaturated carboxylic acid graft polyvinyl resin, unsaturated carboxylic acid graft acrylic resin or unsaturated carboxylic acid graft polymethylpentene resin.

Above-mentioned unsaturated carboxylic acid graft vistanex also has suitable and adhesiveness electrode 3, but it also has gratifying thermal endurance, cold resistance secondary workability (being easy to make bag or compression molding).

When the thickness of innermost layer 14 during less than 10 μ m, during electrode 3 heat-sealings, may form the slit in this part, can't prevent that steam from invading inside battery.When the material of forming innermost layer 14 had low fusing point and low excessively Vicat softening point, innermost layer 14 did not have thermal endurance, cold resistance, and innermost layer 14 each other and and electrode 3 between bonding strength step-down and packaging bag may break.Even the thickness of innermost layer 14 surpasses 10 μ m, bonding strength between the innermost layer 14 that is heat-sealed also no longer increases, but the thickness as laminated structure then increases with the thickness of innermost layer 14, the packing that this laminated structure forms needs bigger installing space, and this is inconsistent with the object of the invention of saving the space.Though can use aforesaid unsaturated carboxylic acid graft polymer separately, have gratifying characteristic by some materials that obtain that mix in these unsaturated carboxylic acid graft polymer.

Be suitable for forming the unsaturated carboxylic acid graft polymer of innermost layer 14 except aforementioned, other suitable material is any in polyvinyl resin, acrylic resin, ethylene-vinyl acetate copolymer, the ionomer, in addition, the copolymer of the copolymer of the copolymer of the copolymer of ethene and acrylic acid derivative, ethene and methacrylic acid derivative, propylene and acrylic acid derivative, propylene and methacrylic acid derivative also can use.

Be preferably; thickness is in 10 to 50 mu m ranges; be preferably in 15 to 25 mu m ranges; and by unsaturated carboxylic acid graft vistanex such as unsaturated carboxylic acid graft polyethylene; the protective layer 15 that unsaturated carboxylic acid graft polypropylene or unsaturated carboxylic acid graft polymethylpentene are formed is arranged between innermost layer 14 and the steam insulating course 12.Since the protective layer 15 that the unsaturated carboxylic acid graft polyolefin is formed the thermal endurance and the cold resistance that can improve packaging material for lithium battery is set.

Can be by the extruding lamination or by making film heat laminating that film obtains in advance between insulating course 12 and innermost layer 14 with the unsaturated carboxylic acid graft vistanex as intermediate layer 13, or it is also passable to make the unsaturated carboxylic acid graft polyolefin film carry out the crushing clamp layer laminate between another intermediate layer 13 and insulating course 12.The unsaturated carboxylic acid graft vistanex has the height bonding strength, and can prevent because the laminated structure delamination that the illeffects of the material that packing filler or packing filler and reaction of moisture produce causes.

For the applicability of stabilizing and increasing each layer of laminated body that constitutes packaging material for lithium battery of the present invention, secondary operations (system packing bag or the compression molding packing box) characteristic of system film, lamination processability and final products, can stand surface activation or Passivation Treatment, as Corona discharge Treatment, blasting treatment, oxidation processes or ozonation treatment.The material that forms each layer of lithium battery packaging material laminated structure can comprise at least a in the following material, these materials are suction hygroscopic materials (as drier), gas absorption material such as oxygen, matrixes such as nitrogen cut off adsorbent, fire retardant, antistatic agent resists charged dose (as charcoal), surfactant or inorganic oxide etc.), conductive materials, electromagnetic shielding material etc., oxidation retarder can also suit to add in inorganic organic metal resin, ultra-violet absorber, antistatic agent, antitack agent, lubricant (as fatty acid amide), fire retardant, inorganic or organic filler, dyestuff and pigment etc.These materials can add also and can aqueously apply.

As the method for making packaging material for lithium battery of the present invention, can pass through T pattern extrusion, inflatable method or coetrusion form as the film of forming layer, can make the film that is provided with again on the material of film at these by coating process or vapour deposition method and carry out ultraviolet curing or electronic beam curing.Can will form layer laminate by methods such as dried lamination, extruding lamination, coextrusion lamination or heat laminatings arrives together.

Embodiment

For packaging material for lithium battery of the present invention, as embodiment and Comparative Examples, the laminated body of the formation that is produced as follows, and its performance estimated.And the layer with following breviary denotational description embodiment and comparative example constitutes and processing method, the numeral layer thickness (μ m) in ().Symbol about processing method:

D: dried lamination, EC: the extruding lamination, COEC: the coextrusion lamination, TL: heat laminating is about the material symbol:

PET: oriented polyester film, ON: oriented nylon film, COPET: copolyester film, AL: aluminium foil, POa: unsaturated carboxylic acid graft polyolefin film (acrylic resin, polyvinyl resin or polymethylpentene resin molding), EVA: ethylene-vinyl acetate copolymer, EAM: ethene and acrylic acid copolymer derivative thing or ethene and methacrylic acid derivative co-polymer membrane (EMA, EMAA, EAA, EMMA), Io: ionomeric membrane, EP: epoxy resin film, FU: phenol resin film, M: melamine resin film, AK: alkyd resins film, PI: polyimide film, PU: polyurethane film, U-PET: unsaturated polyester (UP) film, PEU: polyester-urethane film, PeU: polyethers-urethane film, F: fluororesin.

The unsaturated carboxylic acid graft polymer refers to the unsaturated carboxylic acid graft polyvinyl resin in configuration example, unsaturated carboxylic acid graft acrylic resin and unsaturated carboxylic acid graft polymethylpentene resin.These three kinds of unsaturated carboxylic acid graft polymer are similarly using, and therefore in the following description they are called the unsaturated carboxylic acid graft polymer.Except as otherwise noted, the fusing point that is used to form the unsaturated carboxylic acid graft polymer of laminated structure in an embodiment is more than 80 ℃, and Vicat softening point is more than 75 ℃.

1) as the making of the laminated structure in embodiment and the Comparative Examples

Embodiment 1

PET(12)<D>AL(20)/EP<D>PET(12)<D>POa(20)

In the present embodiment, trial-production is as adhesive＜D〉following various materials, and estimate.But, use illustration being configured in herein of other adhesive in addition not to be mentioned.

＜D ₁〉: mylar,＜D ₂〉: polyether resin,＜D ₃〉: urethane resin,＜D ₄〉: polyethers-urethane resin,＜D ₅〉: polyester-urethane resin,＜D ₆〉: unsaturated polyester (UP)-urethane resin,＜D ₇〉: polyurethane resin,＜D ₈〉: polyethylene-imide resin,＜D ₉〉: cyanoacrylate resin,＜D ₁₀〉: organic titanic compound,＜D ₁₁〉: epoxy resin,＜D ₁₂〉: the copolymer of ethene and acrylic acid and methacrylic acid derivative,＜D ₁₃〉: polyether resin

Embodiment 2

PET(12)<D ₅>ON(15)<D ₅>AL(20)/EP<D ₅>PET(12)<D ₅>POa(50)

Embodiment 3

PET(12)<D ₅>AL(20)/EP<D ₅>PET(12)<D ₅>POa(50)

Embodiment 4

PET(12)<D ₅>AL(20)/EP+M/<TL>POa<EC>PET(12)<D ₅>POa(70)

Embodiment 5

ON(15)<D ₅>AL(20)/EP+FE/<TL>POa<D ₅>PET(12)<D ₅>POa(50)

Embodiment 6

CO-PET(16)<EC>PE(20)<EC)AL(50)/EP+M/POa<TL>POa(20)<D ₅>CO-PET(16)<D ₅>POa

Embodiment 7

ON(25)<D ₅>AL(40)/EP+POa<TL>POa(20)/PP(20)/POa(10)<COEC>

Embodiment 8

ON (25)＜D ₅AL (40)/EP+PEU＜TL〉POa (20)＜EC〉CO-PET (16)＜D ₅PP (in the coating of electrode one side) (50)

Embodiment 9

ON (25)＜D ₅AL (80)/EP+PeU/POa＜TL〉PE (20)＜EC〉HDPE (50) (at electrode one side coating POa)

Embodiment 10

PET(12)<D ₅>ON(15)<D ₅>AL(10)/PE+M<TL>EAM(20)<EC>PET(12)<D ₅>Io(50)

Embodiment 11

ON(15<D ₅>AL(20)/COPET+Io+EVA<TL>POa(20)<D ₅>PET(12)<EC>EAM(12)a

Embodiment 12

PET (12)＜D ₅AL (20)/EP+M/POa (20)＜TL〉POa (20) dielectric film PP (10)＜D ₅PET (12)＜D ₅POa (30)

Embodiment 13

ON (15)＜D ₅AL (20)/EP+POa/＜TL〉PP or HDPE (20) dielectric film POa (20)＜EC〉PET (12)＜EC〉POa (20)

Embodiment 14

CO-PET (12)＜EC〉AL (50)/EP+PEU＜EC〉PP or HDPE dielectric film POa (20)＜EC〉PET (12)＜EC〉POa (20)

Embodiment 15

ON (25)＜D ₅AL (50)/EP+EVA+CO-PET/＜D ₅POa dielectric film PP (10)＜D ₅PET (12)＜D ₅POa (30)

Embodiment 16

PET (12)＜D ₅PE (20)＜EC〉AL (20) phosphate treatment/EP+M/＜TL〉POa dielectric film POa (20)＜EC〉PET (12)＜EC) POa (20)

Comparative Examples 1

PET(12)<D>ON(15)<D>AL(20)<D>PET(12)<D>POa(50)

Comparative Examples 2

PET (12)＜D〉ON (15)＜D〉AL (20)＜D〉PET (12)＜D〉PE or PP (50)

(any adhesive resin film, as POa, EVA, Io or EMA film are not sandwiched between electrode and the innermost layer)

2) evaluation method

Laminated structure in trial-production embodiment 1 to 16 and the Comparative Examples 1,2, and use them, during the pocket type, make the packing bag of 30mm * 60mm, put in bag that the battery main body part with the thick nickel system electrode of 100 μ m is thick to be the battery of 4mm, and three open side edges of bag are heat-sealed and encapsulate with electrode.200 ℃ temperature and 1kgf/cm are used in heat-sealing ²Pressure through 1 second, and form the wide hermetic unit of 10mm, thereby finally finish the making of sample battery at the peripheral part of bag.

Form the occasion that the mold pressing type is packed in compression molding, each compression molding package body is that the container part and the wide flange portion of 7mm that are of a size of 30mm * 60mm * degree of depth 4mm are formed by die pressing.Have after the thick battery main body of 4mm of the thick nickel system electrode of 100 μ m is placed in the container of mold pressing packing boxlike, thereby with the lid heat-sealing bonding to the flange of container with cell sealing in the mold pressing packing box, above step is carried out respectively, thereby finishes the making of sample battery.

The trial-production battery that embodiment and comparative example are obtained carries out following test.

A) outward appearance of battery has the generation of free of pinholes, checks the section (electrode have with insulating course do not contact) of the heat seal lands of electrode part.

B) storage under each condition of (1) 40 ℃ of environment and 90%RH and (2) 60 ℃ and 85 ℃ (doing) of sample battery was checked the following characteristic under each condition after 10 days.

The steam property cut off: use Ka Er. Fischer's method is measured the moisture that contains in the battery, thereby whether the increase of checking the amount of moisture that contains in the battery is below 50%.

The anti-fissility of lamination: check that packing peels off situation and be confirmed to be delamination is not arranged.

3) evaluation test result

Packing bag that laminated structure forms among the embodiment 1 to 16 and mold pressing packing box are not all found pin hole and stick portion not.The peel strength of stick portion is 100g/m ²More than.

The aluminium foil of each laminated structure (having the aluminium foil that is untreated) in the Comparative Examples 1 and 2 and the peel strength of PET film are 80g/m ²More than.

When checking section, innermost layer is unsatisfactorily with electrode adhesion and pin hole takes place, and the innermost layer of these packaging material is only formed by polyethylene resin film or polypropylene resin film and do not contain any POa, EVM, Io or EMA layer between innermost layer and electrode.

By being that the anticorrosive film that forms on innermost layer one side surface of insulating course can prevent corrosion and the consequent laminated structure delamination that aluminium foil surface is caused by acid (electrolyte and the reaction of moisture of invading laminated structure produce) at aluminium foil.

The 5th embodiment

Various details the 5th embodiment.Among the 5th embodiment and Fig. 7 to 9 explanation second embodiment roughly the same, except the formation of the laminated structure in second embodiment shown in formation and Fig. 7～9 of the laminated structure in the 5th embodiment different.Therefore, describe the 5th embodiment, will will be omitted with the description that identical reference marks is represented and it is detailed with part similar or corresponding in second embodiment with reference to Fig. 7 to 9.

To 7 (e), outermost layer 11 is to be made of oriented polyester film or nylon membrane with reference to Fig. 7 (a).Be used to form that the suitable polyester resin of oriented polyester film is adducible to be pet resin, polybutylene terephthalate (PBT) resin, PEN resin, PBN resin and polycarbonate resin etc.Being used to form the suitable polyamides resin of nylon membrane adducible is nylon 6 and nylon 66.This outermost layer 11 makes the layer that contains orientation PET of one deck at least or oriented nylon, more than the bed thickness 6 μ m, is preferably in 12 to 25 mu m ranges.The occasion of using as lithium battery when outermost layer 11 owing to be the position that directly contacts with equipment (hardware), therefore, wishes that outermost layer 11 is made of insulating resin.Consider that the film that forms outermost layer 11 has pin hole and form pin hole in the film in the course of processing, so the thickness of outermost layer 11 is necessary for more than the 6 μ m, is preferably, in 12 to 25 mu m ranges.

From making outermost layer 11 have the high resistance pinhole characteristics and improving the angle of its insulating capacity during as battery packages, outermost layer 11 can be made of stack membrane.Preferably, outermost layer 11 comprises one deck resin bed at least, and this resin bed is that two-layer above layer is formed, and each bed thickness is more than the 6 μ m, is preferably, in 12 to 25 mu m ranges.

Below be make outermost layer 11 carry out laminationization 1) to 6) and example.

1) orientation PETG film/oriented nylon film

2) orientation PETG film/polyethylene film

Thereby be preferably the outermost layer that forms sandwich construction or improve the mechanical property (stability in transit on package packing machine and processing equipment) of packaging material laminated structure, and the friction between mould and the outermost layer when reducing moulding in outermost surface coating one deck fluorocarbon resin or silicone resin.For example,

3) fluorocarbon resin film/orientation PETG film (fluorocarbon resin becomes membranaceous and is adhered on the orientation PETG film, thus or by in the liquid fluorocarbon resin of coating on the orientation PETG film and make its curing on orientation PETG film, form the fluorocarbon resin film.)

4) silicone resin film/orientation PETG film (the silicone resin film is adhered on the orientation PETG film, thus or by at the liquid silicone resin of coating on the orientation PETG film and make its curing on orientation PETG film, form the silicone resin film.)

5) fluorocarbon resin film/orientation PETG film/oriented nylon film

6) silicone resin film/orientation PETG film/oriented nylon film

The composition layer laminate of above-mentioned outermost layer 11 is made up of following material to adhesive phase together, these materials are mylar, polyether resin, urethane resin, polyethers-urethane resin, polyester-urethane resin, isocyanate resin, vistanex, polyethylene-imide resin, cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin, silicone resin, the mixture of some in these resins and the modifier of these resins.

Insulating course 12 is for preventing that special steam from penetrating into the layer of lithium battery 1 inside from the outside.In order to prevent the ill-effect of the pin hole that insulating course 12 forms itself, also in order to stablize machinability (being easy to make bag or concavo-convex compression molding), and in order to make insulating course 12 have anti-pinhole characteristics, so insulating course 12 is preferably formed by metal (as aluminium or nickel etc.) paper tinsel more than the thickness 15 μ m or inorganic compound (as silicon dioxide or aluminium oxide etc.) film.Be preferably, insulating course 12 is thickness soft aluminium foils at 15 to 80 mu m ranges.

How the inventor is to reducing pin hole, and the problem that prevents formation crackle in the lithium battery compression molding external packing has been carried out conscientiously research, found that as insulating course 12 used when the iron content of aluminium foil is in 0.3 to 9.0% scope, the aluminium foil of this material more superior aspect the ductility, and is difficult for the sidewall that forms pin hole and can form concavo-convex mold pressing battery external packing (battery packages bag) easily than the aluminium foil that does not conform to iron when being bent as the laminated structure with this aluminium foil insulating course.Iron content is less than 0.3% aluminium foil and forms anti-pin hole film unsatisfactorily, and can not improve formability.Thereby iron content surpasses 9.0% aluminium foil hardening and damages the bag variation of machinable flexibility of laminated structure as laminated body.

For chemical reagent resistance and the organic solvent resistance that improves aluminium foil surface, chemical treatment such as this aluminium foil surface can be handled with chromic acid, phosphate treatment or use the anode treatment of sulfuric acid, oxalic acid, chromic acid or phosphoric acid after carry out sealing of hole and handle.

Can particularly on aluminium foil surface, form not shown solvent resistance, acid-resisting resin bed (following note is made protective layer 15).Above-mentioned protective layer 15 can not only be protected aluminium foil surface effectively and can effectively aluminium foil be adhered on the intermediate layer 13.As protective layer 15 are the layers that contain at least a formation in the following material, and these materials are epoxy resin; phenol resin; melamine resin; alkyd resins; polyimide resin; unsaturated polyester resin; polyurethane resin; the unsaturated carboxylic acid graft vistanex; mylar (comprising pet copolymer and polybutylene terephthalate (PBT) copolymer etc.); ionomer; ethylene-vinyl acetate copolymer; the copolymer of ethene and acrylic acid derivative; the copolymer of ethene and methacrylic acid derivative; the modifier of polyether resin and these resins.At least form this resin bed of one deck at aluminium foil surface.

On innermost layer one side surface of insulating course 12, can form protective layer 15; this protective layer thickness is in 10 to 50 mu m ranges; be preferably in 15 to 25 mu m ranges; and be by unsaturated carboxylic acid graft vistanex such as unsaturated carboxylic acid graft polyvinyl resin, unsaturated carboxylic acid graft acrylic resin or unsaturated carboxylic acid graft polymethylpentene constitute.Can improve thermal endurance, cold resistance, chemical proofing and organic solvent resistance with the laminated structure that unsaturated carboxylic acid graft vistanex formation protective layer 15 is set as packaging material for lithium battery.

Can on insulating course 12, form the unsaturated carboxylic acid graft polyolefin resin film in the following manner, extruding unsaturated carboxylic acid graft vistanex on insulating course 12, or form resin molding and dry this film at the liquid unsaturated carboxylic acid graft vistanex of insulating course 12 surface applied, for example 150 ℃ of 10 seconds of oven dry down.

In the present invention; intermediate layer 13 can form between insulating course 12 or protective layer 15 and innermost layer 14, thereby can prevent from again protection insulating course 12 time to come in contact (short circuit) because innermost layer 14 is electrode 3 and the aluminum insulating course 12 that hot sealing layer attenuation (owing to using heat and due to pressure in the hot sealing process when forming bag) causes.Add ability (thermal endurance and cold resistance) that intermediate layer 13 can the stabilize lithium battery conforms so will carry out lamination.Intermediate layer 13 thickness are more than the 10 μ m, fusing point is more than 80 ℃, is preferably, and intermediate layer 13 comprises that at least one layer thickness is in 12 to 25 mu m ranges, and be, or the layer of the formation of the mixture in the modifier of these resins or these resins by mylar, vistanex, fluorocarbon resin.

The suitable mylar that is used to form intermediate layer 13 is pet resin, polybutylene terephthalate (PBT) resin, PEN resin, PBN resin, polycarbonate resin, and the modifier of their copolymer and these polymer.

Suitable vistanex is an acrylic resin, ethylene-propylene copolymer, ldpe resin, the medium density polyethylene resin, high-density polyethylene resin, linear low density polyethylene resin, ethene-alpha-olefin copolymer (using the single-point catalyst polymerization to obtain), the polyvinyl resin that contains metal ion, ethylene-methyl methacrylate derivative and ethylene-propylene acid derivative copolymer, polybutene resin, the unsaturated carboxylic acid graft polyvinyl resin, the unsaturated carboxylic acid graft acrylic resin, the modifier of unsaturated carboxylic acid graft polymethylpentene resin and these polymer.Suitable fluorocarbon resin is tetrafluoroethylene resin, trifluoro-ethylene resin, polyvinylidene fluoride resin, polyfluoroethylene resin, ethylene tetrafluoroethylene copolymer, polychlorotrifluoroethylene resin, ethene-one chlorotrifluoroethylcopolymer copolymer and tetrafluoraoethylene-hexafluoropropylene copolymer.These resin moldings can be orientation or non-orientation.

Intermediate layer 13 can be single layer structure or sandwich construction.Intermediate layer 13 is occasions of sandwich construction, can carry out the intermediate layer 13 that lamination forms sandwich construction by coetrusion.For example, when intermediate layer 13 is undertaken by coetrusion, can be the sublayer more than two-layer shown below and constitute, and the thickness of each sublayer is preferably in 10 to 100 mu m ranges, in 15 to 25 mu m ranges.Can specifically enumerate following 1) to 9) example in the intermediate layer 13 of the multi-ply construction of planting.Description wherein be from insulating course to innermost layer in sequence (below, roughly the same).

1) PEA (unsaturated carboxylic acid graft polyethylene)/HDPE

2) PPA (unsaturated carboxylic acid graft polypropylene)/PP (fusing point: more than 120 ℃, be preferably, more than 135 ℃)

3) PMa (unsaturated carboxylic acid graft polymethylpentene)/TPX (polymethylpentene) (fusing point: more than 120 ℃, be preferably, more than 135 ℃) or HDPE or PP

4) PEA or PPA/PMa (two-layer)

5) PEA or PPA/PMa/PEA or PPA (three layers)

6) PEA or PPA/PMa/PMa (three layers)

7) PEA or PPA/PMa/TPX/PMa (four layers)

8) PEA or PPA/PMa/TPX/PMa/PEA or PPA (five layers)

9) PEA or PPA/PMa/PEA or PPA (three layers)

When multilayer intermediate layer 13 is when forming by dried lamination, intermediate layer 13 is made up of three or more sublayers (comprising one or more adhesive phases), and the thickness of each sublayer is preferably in 10 to 100 mu m ranges, in 15 to 25 mu m ranges.Following multi-ply construction 1) to 9) be example by the intermediate layer 13 of dried lamination formation.In following configuration example, the adhesive phase that uses in the dried lamination of symbol "/".

1) sublayer 1 (PEA, PPA or PMa layer)/HDPE

2) sublayer 1/PP (fusing point: more than 120 ℃, be preferably, more than 135 ℃)

3) sublayer 1/TPX

4) sublayer 1/PMa (fusing point: more than 135 ℃, Vicat softening point: more than 110 ℃)

5) sublayer 1/ orientation PETG

6) sublayer 1/ polybutylene terephthalate (PBT)

7) sublayer 1/ PEN

8) sublayer 1/ fluorohydrocarbon

9) PEA, PPA or PMa/HDPE, PP, TPX, PMa, orientation PETG, polybutylene terephthalate (PBT), PEN or fluorohydrocarbon/PEA, PPA or PMa

With each sublayer adhesive stacks in the intermediate layer 13 of aforementioned multilayer adhesive phase to a time-out, the proper adhesive of use is the resin of polyester binder, polyethers adhesive, urethane adhesives, polyethers-urethane adhesives, polyester-urethane adhesives, isocyanate adhesive, polyolefin-based adhesive, polyethylene-imines adhesive, cyanoacrylate adhesive, organic titanic compound, epoxy adhesive, acid imide adhesive and the modifier of silicone adhesive and these adhesives and the mixture of these adhesives etc. with dried lay-up method.

The innermost layer 14 of packaging material for lithium battery of the present invention must be when having heat-sealing bonding each other, also must have can be the heat sealability that the metalwork heat-sealing bonding arrives with the electrode 3 of lithium battery main body, and must be insensitive to the negative interaction of lithium battery body matter thing, that is, never degenerate, deterioration not.Seek in the suitable material process that forms innermost layer 14 by research, known that the resin bed with following feature is gratifying, resin layer thickness is more than the 10 μ m, be preferably, in 50 to 100 mu m ranges and by fusing point is more than 80 ℃, Vicat softening point is that any resin more than 70 ℃ is formed, comprise the unsaturated carboxylic acid graft polyvinyl resin as the unsaturated carboxylic acid graft vistanex, the layer that the mixture of some constitutes in unsaturated carboxylic acid graft acrylic resin and unsaturated carboxylic acid graft methylpentene resin and these unsaturated carboxylic acid graft vistanexes demonstrates excellent results.

The unsaturated carboxylic acid graft vistanex can be adhered on the electrode 3 well, and has good thermal endurance, cold resistance, machinability (being easy to make packing bag or concavo-convex compression molding).

When the thickness of innermost layer 14 during less than 10 μ m, when electrode 3 is heat-sealed, may form the slit in this part, the result makes battery packages can't prevent that steam from invading battery packages and promptly lacking partition.When innermost layer 14 had low fusing point and low excessively Vicat softening point, innermost layer 14 do not have thermal endurance, cold resistance, innermost layer 14 films each other and and electrode 3 between bonding strength step-down and packaging bag may break.Even the thickness of innermost layer surpasses 100 μ m, bonding strength between the innermost layer 14 that is heat-sealed no longer increases, and the thickness of innermost layer 14 is increased, thereby the thickness of laminated structure is increased, and the packing that this laminated structure forms needs bigger installing space, and this is opposite with purpose that the present invention saves the space.

Though can use aforesaid unsaturated carboxylic acid graft polymer separately, have gratifying characteristic by some materials that obtain that mix in these unsaturated carboxylic acid graft polymer.

Usually, in packaging material for lithium battery of the present invention, the shape of external packing body 4 is shown in Fig. 8 (b), and slot type external packing body is made in moulding.In the case, container ground 6 has compression molding part 8, and this compression molding partly is used to contain battery main body and flange 9 and lid 7, covers 7 sealed being adhered on the flange 9.Basically, five layer laminate tectosomes shown in container ground 6 Fig. 8 (a) form.The mylar that forms outermost layer 11 and/or intermediate layer 13 is pet copolymer or polybutylene terephthalate (PBT) copolymer.Be preferably, the film that forms outermost layer 11 and/or intermediate layer 13 is oriented under low extensibility.When using such copolymer, container ground 6 can be formed square.Container can be shaped to following shape easily: ratio d/T is more than 1/50, and T is the width of container ground 6 openends, and d is the degree of depth of container ground 6, and sidewall is with the angle tilt below 130 °.The compression molding packing box can contain battery main body closely.Because the lid 7 that is attached to container ground 6 is not molded, covers 7 battery use packing material and need not to be co-polymer membrane so be used to form.

Except the protective layer 15 that forms at aluminium foil surface; the unsaturated carboxylic acid graft vistanex can also be extruded as intermediate layer 13 and be stacked between insulating course 12 and the innermost layer 14; or the film of in advance above-mentioned resin being made is good on insulating course 12 and the innermost layer by heat laminating, perhaps with above-mentioned resin extruded and be stacked in the middle of another intermediate layer 13 and the insulating course 12 also passable with hot interlayer.Such interlayer lamination can form unsaturated carboxylic acid graft vistanex protective layer 15 with innermost layer 14 1 side insulating courses surface and unite use.At this moment; in order to promote intermediate layer 13; extruding and bonding to the surface of insulating course 12 or protective layer 15; can apply to the adhesive surface of each layer 1 μ m thick by any film of forming in the following material; then can improve the bonding strength of each interlayer, these materials are mylar; polyether resin; urethane resin; polyethers-urethane resin; polyester-urethane resin; isocyanate resin; vistanex; polyethylene-imide resin; the cyanoacrylate resin; organic titanic compound; epoxy resin; imide resin and silicone resin; with some mixture in the modifier of these resins and these resins.This film is the adhesive layer 1 of laminated structure 10.

Can pass through the adhesive surface of ozonation treatment intermediate layer 13, insulating course 12 or protective layer 15.

In addition, intermediate layer 13 and insulating course 12 or protective layer 15 can be bonding with dried lay-up method.Can also intermediate layer 13 be adhered on insulating course 12 or the protective layer 15 by heat laminating or the coetrusion that uses the unsaturated carboxylic acid graft vistanex.The bonding strength height of each interlayer that is bonded together by coextrusion or heat laminating, and can prevent that laminated structure from peeling off delamination (because the material of packing filler or packing filler and aqueous vapor reaction generation cause).

Can form outermost layer 11, insulating course 12, intermediate layer 13 and the innermost layer 14 of the laminated structure 10 of packaging material for lithium battery among also lamination the present invention by T pattern extrusion, inflatable method or coetrusion etc.When needs, can also pass through coating process, evaporation process, methods such as ultraviolet curing or electronic beam curing form the secondary film, and can pass through dried laminating method, the extruding lay-up method, coextrusion lay-up method or heat laminating method are bonded together adjacent layer and realize laminationization.

Being used for dried lamination suitable bonding is polyester binder, polyethylene-imines adhesive, polyethers adhesive, cyanoacrylate adhesive, urethane adhesives, organic titanic compound adhesive, polyethers-urethane adhesives, epobond epoxyn, polyester urethane adhesives, acid imide adhesive, isocyanate adhesive, polyolefin-based adhesive and silicone adhesive.

Can apply the thick and binder film that form by one of following material of about 1 μ m during with adjacent each layer laminate by the extruding lamination, thereby stablize and promote each plunger bond strength, these materials are mylar, polyether resin, urethane resin, organic titanium, polyethers-urethane resin, polyester-urethane resin, isocyanate resin, vistanex, polyethylene-imide resin, the cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin and silicone resin, and some mixture in the modifier of these resins or these resins, perhaps make each layer stand the ozonation treatment of surface activation.

Unsaturated carboxylic acid graft vistanex when being used for coextrusion lamination or heat laminating has also improved the ability of opposing packing filler illeffects when improving bonding strength.

Embodiment

The concrete embodiment that constitutes is exemplified below as packaging material for lithium battery of the present invention, and constitutes the making laminated body by these.And when being used to the external packing body of lithium battery, solved all problems of the present invention.

Below shown in configuration example in the breviary symbol as follows.

Breviary symbol: PET: orientation PETG film, ON: oriented nylon film, AL: aluminium foil, PBT: polybutylene terephthalate (PBT),＜D: dried lamination,＜EC: extrude lamination,＜COEC: coextrusion,＜TL: in heat laminating, (): thickness μ m

In configuration example, said unsaturated carboxylic acid graft polymer, refer to unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene and unsaturated carboxylic acid graft polymethylpentene, using when using above-mentioned three kinds of unsaturated carboxylic acid graft polymer in an embodiment is similarly, and therefore these unsaturated carboxylic acid graft polymer will be collectively referred to as the unsaturated carboxylic acid graft polymer in the following description.Unless otherwise, the fusing point that is used to form the unsaturated carboxylic acid graft polymer of laminated structure among the embodiment is more than 80 ℃ and Vicat softening point is not less than 75 ℃.

Be used to form the laminated structure of bag

Embodiment 1

PET (12)＜D ₂AL (20)＜D ₅PET (12)＜D ₅Unsaturated carboxylic acid connects

Branch polymer film (50)

In the present embodiment, be made as＜D the various adhesives of adhesive and being estimated, use illustration not mention here with the structure of outer adhesive.

＜D ₁〉: mylar,＜D ₂〉: polyether resin,＜D ₃〉: urethane resin,＜D ₄〉: polyethers-urethane resin,＜D ₅〉: polyester-urethane resin,＜D ₆〉: isocyanate resin,＜D ₇〉: vistanex,＜D ₈〉: polyethylene-imide resin,＜D ₉〉: cyanoacrylate resin,＜D ₁₀〉: organic titanic compound,＜D ₁₁〉: epoxy resin,＜D ₁₂〉: imide resin,＜D ₁₃〉: silicone resin

Change the middle layer of PET in this structure and the following structure into PP, HDPE, LDPE, LLDPE, MDPE, fluorocarbon resin, PBT and biaxial orientation EVOH and study and estimate.

Below similarly estimate.

Embodiment 2

PET(12)<EC>PE(15)<EC>AL(20)<D ₅>PET(12)<D ₅>

Unsaturated carboxylic acid graft polymer film (50)

Embodiment 3

PET (12)＜D ₂AL (20)＜D ₂PET (12)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Embodiment 4

ON (6)＜D ₂AL (15)＜D〉PET (12)＜D ₅Unsaturated carboxylic acid graft

Polymer film (50)

Be used to form the laminated structure of mold pressing type packing

Embodiment 5

Pet copolymer film (16)＜D ₂ON (15)＜D ₂AL (20) (acidproof processing: chromic acid is handled)＜D ₅Pet copolymer (16)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Embodiment 6

Pet copolymer film (16)＜EC〉PE (15)＜EC〉AL (20) (acidproof processing: phosphate treatment)＜D ₅Pet copolymer (16)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

As having different outermost laminated structure forms

Embodiment 7

ON (25)＜D ₂AL (40)＜D ₅Pet copolymer film (16)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Embodiment 8

ON (25)＜EC〉AL (40)＜D ₅Pet copolymer film (16)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

As with insulating course and intermediate layer heat laminating form

Embodiment 9

PET (12)＜D ₅AL (20)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜D ₅PET (12)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Middle layer of PET portion in this structure also can be PP, HDPE, fluorocarbon resin film, PBT or biaxial orientation EVOH, below identical therewith.

Embodiment 10

PET (12)＜D〉AL (20)＜TL〉(epoxy melamine) unsaturated carboxylic acid graft polymer (20)＜EC〉PET (12)＜D ₅Unsaturated carboxylic acid graft polymer film (20)

Embodiment 11

ON (15)＜D ₅AL (20)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜EC〉PET (12)＜EC〉unsaturated carboxylic acid graft polymer film (50)

PET portion as the intermediate layer in this structure can be PP, unsaturated carboxylic acid graft polymethylpentene film or HDPE.If replace PET to form intermediate layer with PP this moment, is the unsaturated carboxylic acid graft polypropylene screen as front and back unsaturated carboxylic acid graft polymer film then.If replace PET as the intermediate layer with HDPE, the unsaturated carboxylic acid graft polyethylene film before and after then forming.

Embodiment 12

PET (12)＜D ₅ON (15)＜D5〉AL (20) baking-curing unsaturated carboxylic acid graft polypropylene screen (5)＜TL〉PP (20)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

The PP intermediate layer can be PE or polymethylpentene film in this example.Work as PE and be used as the intermediate layer this moment, uses the unsaturated carboxylic acid graft polyethylene film to replace unsaturated carboxylic acid graft polypropylene screen coating aluminium foil.If the intermediate layer is the polymethylpentene film, use unsaturated carboxylic acid graft polymethylpentene film to replace unsaturated carboxylic acid graft polypropylene screen coating aluminium foil.

The intermediate layer can be the multilayer film that forms by coextrusion.

Embodiment 13

ON (15)＜D ₅AL (20)＜TL〉unsaturated carboxylic acid graft polymer film (20)/unsaturated carboxylic acid graft polymethylpentene film (20)/polymethylpentene (20)/unsaturated carboxylic acid graft polymethylpentene (20)/unsaturated carboxylic acid graft polymer film (50)＜COEC 〉

Embodiment 14

PET (12)＜D ₅The acidproof processing of AL (20) (epoxy melamine)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜D ₅PET (12) unsaturated carboxylic acid graft polymer film (50)

In the present embodiment, studied and estimated conduct＜D〉the following various adhesives of adhesive, but be to use illustration then will not put down in writing with the formation of outer adhesive.

＜D ₁Mylar＜D ₈Polyethylene imine resin

＜D ₂Polyether resin＜D ₉The itrile group acrylic resin

＜D ₃Urethane resin＜D ₁₀Organotitanium resin

＜D ₄Polyethers urethane resin＜D ₁₁Epoxy resin

＜D ₅Polyester urethane resin＜D ₁₂Imide resin

＜D ₆Isocyanate resin＜D ₁₃Silicone resin

＜D ₇Vistanex

Compression molding type packaging material

Embodiment 15

Pet copolymer film (15)＜D ₅AL (40)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜D ₅Pet copolymer film (16)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Intermediate layer in this formation can use PP, HDPE, fluorocarbon resin film, PET or EVOH (ethylene-vinyl alcohol copolymer) to replace pet copolymer.

Embodiment 16

ON (25)＜D ₅AL (50)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜EC〉pet copolymer film (16)＜D〉unsaturated carboxylic acid graft polymer film (50)

Embodiment 17

ON (25)＜D〉AL (80)＜TL〉unsaturated carboxylic acid graft polymer film (15)/PP (15)/unsaturated carboxylic acid graft polymer film (10)＜COEC 〉

Embodiment 18

Silicone resin/pet copolymer film (25)＜EC〉PE (20)＜EC〉the silane coupled processing＜TL of AL (20)〉unsaturated carboxylic acid graft polymer film (20)＜D ₅Pet copolymer film (16)＜D ₅Unsaturated carboxylic acid graft polymer film (100)

Embodiment 19

PET(12)<D ₅>AL(20)<TL>PP(20)<D ₅>PET(12)<D ₅>

Unsaturated carboxylic acid graft polymer film (50)

Embodiment 20

PET (12)＜D ₅AL (20)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜D ₅PET (12)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Embodiment 21

PET (12)＜D ₅AL (10)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜D ₅PET (12)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Compression molding type packaging material

Embodiment 22

PET (16)＜D ₅AL (40)＜D ₅PET (16)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

The sack-type packaging material

Embodiment 23

PET (12)＜D ₅AL (20)＜D ₅PET (6)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

Trial-production is 1 to 3 following various layers of laminated structure that constitutes as a comparative example, and judge the same with embodiment.Unless otherwise, below the unsaturated carboxylic acid graft melting point polymer in the structure is more than 80 ℃, Vicat softening point is more than 70 ℃.

Bag type packaging material

Comparative example 1

PET (12)＜D5〉AL (20)＜D5〉PP (50) unsaturated carboxylic acid graft polymer film (50)

Comparative example 2

PET(12)<D ₅>AL(20)<D ₅>HDPE(50)

Comparative example 3

PET (12)＜D ₅AL (20)＜TL〉unsaturated carboxylic acid graft polymer film (20)＜D ₅PET (12)＜D ₅Unsaturated carboxylic acid graft polymer film (50)

But, use be that fusing point is that 75 ℃ and Vicat softening point are 65 ℃ unsaturated carboxylic acid graft polymer.

The various laminated body of the foregoing description and comparative example have been studied, when using it for the packing bag, make the packing bag of 30mm * 60mm, in bag, put into the thick battery of 4mm of the thick nickel system electrode of 100 μ m, after the charging, peristome and nickel system electrode are sealed together (three side seals).Heat-sealing be under 200 ℃, 1 second, 1kgf/cm ², heat seal width 10mm.

When trial-production mold pressing packaging type battery, the container (the wide flange portion of 7mm is arranged) that moulding section is of a size of 30mm * 60mm * degree of depth 4mm makes by punching press, the thick battery of 4mm that will have the thick nickel system electrode of 100 μ m is placed in the container of mold pressing packing boxlike, and lid is adhered on the flange of container by heat-sealing, thereby battery main body is sealed in the mold pressing packing box.Checked the following:

A) check battery outward appearance, have free of pinholes to take place and electrode heat sealing part section (confirm the electrode insulating course has do not contact).

B) the sample battery descends storage after 10 days at (1) 40 ℃ of environmental condition and 90%RH and (2) 60 ℃ and 85 ℃ (doing), checks its following characteristic.

The steam property cut off: use karl fischer method to measure the moisture that contains in the battery, thereby check whether the moisture increase that contains in the battery is below 50%.

Lamination fissility: check the delamination situation of peeling off of packing.

Laminated structure among the embodiment 1 to 18 is gratifying.Laminated structure in embodiment 19 to 23 and the Comparative Examples 1 to 3 has problem, and these problems are listed among the table 5-1.

Table 5-1

Sample	Problem points
		Embodiment 19	Ageing layer takes place between AL/PP to be peeled off
Embodiment 20	Outermost PET is thin, adds at bag pin hole takes place man-hour, and show out from AL, in the part naked that contacts with hardware
		Embodiment 21	At the pin hole of the about 10 μ m of AL (10) generation, anhydrous steam cuts off property
Embodiment
	22	During processing and forming, because the part of PET (16) does not have copolymer, so pin hole takes place sometimes.
Embodiment 23			The intermediate layer is thin, and when heat-sealing, joint contacts with insulating course sometimes.
	Comparative example 1	Do not go up no air-tightness with joint is bonding.
Comparative example 2			Do not go up no air-tightness with joint is bonding.
	Comparative example 3	Heat-sealing portion does not have thermal endurance, and portion peels off in heat-sealing.

Owing to use the made package body of lithium battery packaging material of the present invention so lithium battery itself can have pliability, than using metal can lightweight more.And, but the gross thickness attenuate can be saved the space as battery.Particularly,, and this gratifying trapping characteristic be can keep for a long time, thermal endurance, cold resistance, the good packaging material of anti-content can be used as lithium battery packaging material trapping characteristic good.

The 6th embodiment

Secondly, sixth embodiment of the invention will be described.In the 6th embodiment and Fig. 1 to 6 in first embodiment of explanation only laminated body constitute differently, other is slightly same with first embodiment.Below, referring to figs. 1 through 6 the 6th embodiment is described.In the 6th embodiment, the part identical with the 1st embodiment will be represented with identical reference marks, and omission is described in detail it.

When lithium battery was used to equipment, shown in Fig. 1 to 6, the outermost layer 11 that forms the laminated structure of packing (being inclusive with the lithium battery main body) directly contacted with equipment (hardware).Therefore, wish to form outermost layer 11 by the resin that is insulation basically.Considering film itself has in pin hole and the work in-process film, pin hole will take place, and the thickness of outermost layer 11 must be more than the 6 μ m, and is best in the scope of 12 to 25 μ m.

In the present invention because the anti-pin hole of outermost layer 11 and can improve it during as the external packing body of battery 1 and hardware between insulating properties, so but laminationization.

At this moment, outermost layer 11 contains the resin bed more than 2 kinds at least, more than the thickness 6 μ m of each layer, and best 12 to 25 μ m.Illustrate as example, can enumerate following 1 the outermost layer laminationization) to 6).

1) orientation PETG film/oriented nylon

2) oriented nylon/orientation PETG film

Be preferably the outermost layer 11 that forms sandwich construction; or use one deck fluorocarbon resin; coating such as acrylic resin or silicone resin outermost surface 11; so that improve the mechanical property (transportation stability in package packing machine and processing equipment) of packaging material laminated structure; so that using mould to form under the mold pressing Packing Condition when the packaging material laminated structure stands moulding process and is secondary operations technology the surface protection that rubs between minimizing outermost layer and the mould.

3) fluorocarbon resin film/orientation PETG film (fluorocarbon resin is membranoid substance or forms in liquid coating back drying)

4) silicone resin film/orientation PETG film.It is membranaceous that silicone resin is; Or aqueous coating back is dry and form.

5) fluorocarbon resin film/orientation PETG film/oriented nylon film

6) silicone resin film/orientation PETG film/oriented nylon film

7) (it is membranaceous that acrylic resin film is for acrylic resin film/oriented nylon film; Or aqueous coating back is dry and harden)

By dried lamination or extruding lamination etc. outermost layer 11 is adhered on the insulating course 12.

Insulating course 12 is to prevent that steam from penetrating into the layer of lithium battery 1 inside from the outside.The pin hole that may form on the insulating course 12 produces harmful effect, in order to reach stable machinability (be easy to make bag or be easy to concavo-convex compression molding), in order to make insulating course 12 have anti-pin hole, insulating course 12 is formed or is formed by inorganic compound (as silicon dioxide or aluminium oxide) film by metal (as aluminium or the nickel) paper tinsel more than the thickness 15 μ m.The thickness of insulating course 12 is preferably in 15 to 80 mu m ranges.

For further reduce pin hole, for when lithium battery external packing body type being made concavo-convex mold pressing type, unlikely in concavo-convex mold pressing portion crackle takes place, the iron-holder of wishing to form aluminium foil insulating course material is in 0.3 to 9.0% scope, and what more optimize is that iron-holder is preferably in 0.7 to 2.0% scope.When iron content is less than 0.3%, can not forms film, and can not improve concave-convex shaping with gratifying anti-pinhole characteristics.When iron content surpasses 9.0%, hindered flexibility as aluminium, and also inferior as the bag of laminated body.

The used aluminium of present embodiment is the so-called hard item for disposal without annealing, therefore, preferably uses the soft item for disposal with flexibility of annealing through suitably.The degree of the flexibility of aluminium foil, stiffness and hardness also is that annealing conditions suitably is chosen as suitable by machinability (being easy to make packing bag or concavo-convex compression molding).Form pin hole when preventing laminated structure by concavo-convex mold pressing and produce the angle of wrinkle, slight or dead annealed soft aluminium foil is better than unannealed duralumin paper tinsel.

The surface is corroded aluminium foil owing to the chemical reaction of aluminium oxide (being formed on aluminium foil surface) and aluminium itself and hydrogen fluoride (HF) (electrolyte and reaction of moisture produce).Therefore be preferably by using acid solution and aqueous slkali that aluminium foil surface is cleared up, remove oxide and oil from aluminium foil surface.The suitable acid that is used to clean comprises inorganic acid and organic acid, and inorganic acid comprises that sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, hydrofluoric acid and chromic acid, organic acid comprise sulfamic acid, oxalic acid, tartaric acid, citric acid, formic acid, lactic acid, glycolic, acetate, gluconic acid, butanedioic acid and malic acid.These acid can be mixed as main component and proper additive and prepare the liquid that is used to clean.The suitable alkali that is used to clean is hydroxide (comprising NaOH), carbonate (comprising sodium carbonate and sodium acid carbonate), phosphate (comprising dibastic sodium phosphate and sodium phosphate), polyphosphate (comprising sodium pyrophosphate, sodium phosphate trimer and sodium tetrapolyphosphate), silicate (comprising sodium metasilicate and sodium metasilicate).Though more than enumerated sodium salt, also can use sylvite and ammonium salt.These alkali and proper additive can be mixed and prepare the alkali lye that is used to clean.

Thereby can form resistance to chemical reagents and the organic solvent resistance that the Surface Machining layer of being made up of phosphate, chromate, fluoride, organo-silicon compound, organic titanic compound or organo-aluminum compound improves aluminium foil surface at aluminium foil innermost layer one side surface.After handling with sulfuric acid, oxalic acid, chromic acid, phosphoric acid positive pole again sealing of hole handle and also can.

Can be by adding silicon dioxide (SiO aptly on the surface-treated layer that forms to aluminium foil surface ₂), calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc waits and further improves resistance to chemical reagents and organic solvent resistance.

By chemistry or physical method, thus aluminium foil surface can be roughened improve aluminium foil and be adhered on the aluminium foil the layer between bonding strength.

On the other hand, the insulating course aluminium foil as the packaging material laminated structure is adhered on the layer of other material composition usually.Compare with other metal, aluminium is to organic solvent, bronsted lowry acids and bases bronsted lowry corrosion-vulnerable more.All contain organic solvent in the active material of most of lithium battery main bodys and the polymer dielectric, as ethylene carbonate, propylene carbonate, diethyl carbonate, dimethyl carbonate or acetone etc.It is hydrofluoric acid (HF) that the lithium salts reaction that contains in water and the polymer dielectric produces a kind of strong acid.After aluminium foil surface was by these organic solvents and acid corrosion, bonding strength decline between aluminium foil and innermost layer or the intermediate layer and the packaging material laminated structure behind the lamination were stripped from delamination, and have lost the function as the packaging material laminated structure.

By various experiments, the present inventor finds, can prevent the corrosion of aluminium foil surface by apply acid resistance, solvent resistance resin bed (finger " protective layer 15 " later on) on surface-treated layer TR face, as shown in Figure 3.Unexpectedly, find that protective layer 15 not only to the protection aluminium foil surface effectively but also can effectively intermediate layer 13 be adhered on the aluminium foil.In the present invention; the material that is used to form protective layer 15 (being coated on insulating course surface or the surface treatment laminar surface) is a resin, comprises epoxy resin; phenolic resins; melamine resin; alkyd resins; polyimide resin; unsaturated polyester resin; polyurethane resin; the unsaturated carboxylic acid graft vistanex; polyester copolymer (comprising pet copolymer and polybutylene terephthalate (PBT) copolymer); the metal ion crosslinked polyvinyl resin; ethylene-vinyl acetate copolymer; ethylene-acrylic acid-methacrylic acid copolymer; the derivative of polyethers-urethane resin and above resin.Protective layer 15 by contain 30% or more above these resins at least a material form.Protective layer 15 can contain following Surface Machining compound, be phosphate, chromate, fluoride or organo-silicon compound, organic titanic compound, organo-aluminum compound etc.

Protective layer 15 also can comprise phosphate layer formed substance (trbasic zinc phosphate; ferric phosphate, manganese phosphate, calcium phosphate; chromium phosphate; titanium phosphate, phosphoric acid tin or phosphoric acid silicon), chromate film formed substance (chromic acid chromium or chromic acid silicon); fluoride films formed substance (titanium fluoride or zinc fluoride); and/or the material (coupling agent, silane coupler, organic titanium coupling agent or organo-aluminium coupling agent) of raising aluminium foil surface adhesion characteristic.

Can be by the suitable silicon dioxide (SiO that adds ₂), calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc waits resistance to chemical reagents and the organic solvent resistance that further improves protective layer 15.

In the present invention, intermediate layer 13 can be sandwiched between insulating course 12 or above-mentioned protective layer 15 and the innermost layer 14.Intermediate layer 13 protection insulating courses 12 and prevent to make electrode 3 and aluminum insulating course 12 come in contact (being short-circuited) because innermost layer 14 is thermal adhesive layer attenuation (because during bag heat and the due to pressure in the hot sealing process).

Intermediate layer 13 can be that multilayer film is so that the environmental suitability of stable cell (thermal endurance, cold resistance).Multilayer intermediate layer 13 comprises that at least one layer thickness is 10 μ m or thicker, be preferably in 12 to 25 mu m ranges, and fusing point is 80 ℃ or higher sublayer.The sublayer is by mylar, vistanex, fluorocarbon resin or their derivative and mixture.

Can enumerate pet resin, polybutylene terephthalate (PBT) resin, PEN resin, PBN resin, polycarbonate resin and their copolymer or modifier as above-mentioned mylar.Can enumerate acrylic resin as above-mentioned vistanex, ethylene-propylene copolymer, ldpe resin, the medium density polyethylene resin, high-density polyethylene resin, linear low density polyethylene resin, ethene-alpha-olefin copolymer (using the single-point catalyst polymerization to obtain), polyvinyl resin (containing metal ion), the copolymer of ethene and methacrylic acid or acrylic acid derivative, polybutene resin, the unsaturated carboxylic acid graft polyvinyl resin, the unsaturated carboxylic acid graft acrylic resin, the derivative of unsaturated carboxylic acid graft polymethylpentene resin and these resins.

Can enumerate tetrafluoroethylene resin, trifluoro-ethylene resin, polyvinylidene fluoride resin, polyfluoroethylene resin, ethylene tetrafluoroethylene copolymer, polychlorotrifluoroethylene, ethene-one chlorotrifluoroethylcopolymer copolymer and tetrafluoraoethylene-hexafluoropropylene copolymer as above-mentioned fluorocarbon resin.Use the orientation or the non-alignment films of these resins.

Also sandwich construction of single layer structure is not only in intermediate layer 13.For example, intermediate layer 13 can be made up of the first intermediate layer 13a and the second intermediate layer 13b.Can or form the intermediate layer 13 of sandwich construction with dried lay-up method lamination by the coetrusion lamination.

Fig. 3 illustration by dried lay-up method the first intermediate layer 13a and the second intermediate layer 13b, two layer laminate are fitted to the intermediate layer that forms together.

For example, when forming intermediate layer 13 by coextrusion, intermediate layer 13 is made up of two or more sublayers, and the thickness of each sublayer is preferably in 15 to 25 mu m ranges in 10 to 100 mu m ranges.Specifically, can enumerate following multi-ply construction 1) to 9) be the example in the intermediate layer 13 that forms by coextrusion.Below use the breviary symbol, from insulating course to innermost layer sequential recitation (below, same).

[contracted notation contracts: EPa: the unsaturated carboxylic acid graft polyethylene; HDPE: high density polyethylene (HDPE); PPa: unsaturated carboxylic acid graft polypropylene; PP: polypropylene; PMa: unsaturated carboxylic acid graft polymethylpentene; TPX: polymethylpentene]

1)PEa/HDPE

2) PEa/PP (fusing point: more than 120 ℃, be preferably more than 135 ℃)

3) PMa/TPX (fusing point: more than 120 ℃, be preferably more than 135 ℃) or HDPE or PP

4) PEa or PPa/PMa (two-layer)

5) PEa or PPa/PMa/PEa or PPa (three layers)

6) PEa or PPa/PMa/PMa (three layers)

7) PEa or PPa/PMa/TPX/PMa (four layers)

8) PEa or PPa/PMa/TPX/PMa/PEa or PPa (five layers)

9) PEa or PPa/PMa/PEa or PPa (three layers)

Following multi-ply construction 1) to 9) be that example and this intermediate layer in the intermediate layer 13 that formed by dried lamination has three layers or more sublayers (comprising adhesive phase), and the thickness of each sublayer is preferably in 15 to 25 mu m ranges in 10 to 100 mu m ranges.Part in following configuration example forms the adhesive phase that has used dried lamination.

[contracted notation contracts

PET: PETG film, PBT: polybutylene terephthalate (PBT), PEN: poly (ethylene naphthalate) film, FR: fluorocarbon resin film]

1) PEa, PPa or PMa/HDPE

2) PEa, PPa or PMa/PP (fusing point: more than 120 ℃, be preferably more than 135 ℃)

3) PEa or PPa or PMa/TPX

4) PEa or PPa or PMa/PMa (fusing point: more than 135 ℃, Vicat softening point: more than 110 ℃)

5) PEa, PPa or PMa/PET

6) PEa, PPa or PMa/PBT

7) PEa, PPa or PMa/PEN

8) PEa, PPa or PMa/FR

9) any the material/PEa among PEa, PPa or PMa/HDPE or PP, TPX, PMa, PET, PBT, PEN or the FR or PPa or PMa

Adhesive layer by dried lay-up method during with each sublayer lamination in the intermediate layer 13 of aforementioned sandwich construction uses insulating course than aftermentioned laminated body of the present invention more by the used adhesive of innermost layer face one side.

As shown in Fig. 4 (e), must be heat sealability between the innermost layer 14 of lithium battery packaging material of the present invention, simultaneously the metal as electrode 3 is also had heat sealability, and its material must be because of the filler that comprises in the packing (being formed by lithium battery packaging material laminated structure) goes bad, deterioration.Know that by research satisfying the material that these requirements are used to form innermost layer 14 is copolymer or the copolymer of ethene or propylene and methacrylic acid derivative and the modifier or the mixture of these resins of unsaturated carboxylic acid graft vistanex, metal ion crosslinked polyvinyl resin, ethene or propylene and acrylic acid derivative.

The thickness of innermost layer 14 is in 10 to 100 mu m ranges, and to be formed by the material with fusing point more than 70 ℃ and the Vicat softening point more than 60 ℃ be gratifying.Polyolefinic adhesiveness, thermal endurance, cold resistance and the machinability (be easy to form bag, be easy to compression molding) with electrode 3 of particularly above-mentioned unsaturated carboxylic acid graft is all suitable.

When the thickness of innermost layer 14 during less than 10 μ m, with electrode 3 heat-sealings the time, form the slit at electrode tip, lost barrier character.Even the thickness of innermost layer surpasses 100 μ m, heat-seal bond strength no longer increases, but then increases as the thickness of laminated body, and the packing that this laminated structure forms needs bigger installing space.

When low and Vicat softening point is low when the material melting point of forming innermost layer 14, innermost layer 14 do not have between thermal endurance, cold resistance, the film and and electrode 3 between bonding strength step-down and packing may break.

Can use following resin as the innermost layer 14 that forms lithium battery packaging material laminated structure of the present invention.

Acrylic resin has

(1) sym-propene polymer resin (fusing point: more than 150 ℃, Vicat softening point: more than 140 ℃)

(2) ethylene-propylene copolymer (fusing point: more than 110 ℃, Vicat softening point: more than 100 ℃)

The random polypropylene resin

The graft polypropylene resin

Polyvinyl resin has:

(3) ldpe resin, medium density polyethylene resin, high-density polyethylene resin, linear low density polyethylene resin, ethylene-propylene-diene copolymer, ethylene-propylene-butylene copolymer be used for single-point catalyst and polymerization and ethene-alpha-olefin copolymer (fusing point: more than 90 ℃, Vicat softening point: more than 80 ℃)

(4) acid-modified polyolefin resin (fusing point: more than 90 ℃, Vicat softening point: more than 80 ℃)

A) vinyl-vinyl acetate copolymer

B) metal ion crosslinked polyvinyl resin and metal ion crosslinked acrylic resin

C) modifier of unsaturated carboxylic acid graft vistanex and these resins

The unsaturated carboxylic acid graft polyvinyl resin

The unsaturated carboxylic acid graft acrylic resin

Unsaturated carboxylic acid graft polymethylpentene resin

D) copolymer of the copolymer of ethene or propylene and methacrylic acid derivative or ethene or propylene and methacrylic acid derivative

Ethylene-methyl methacrylate methyl terpolymer (EMAA)

Ethylene-methyl methacrylate ethyl ester copolymer (EMA)

Ethylene-methyl acrylate copolymer (EMAA)

Ethylene-ethyl acrylate copolymer (EEA)

Ethylene-acrylic acid copolymer (EAA)

Propylene-ethyl methacrylate copolymers (PMA)

Propylene-ethyl acrylate copolymer (PAA)

Innermost layer 14 can be by a kind of in the above-mentioned different resins, and contains the monofilm that the mixture of these resins and modifier are formed, more than 2 layers or multilayer film.

Can be because of T pattern extrusion coating technology, inflatable technology or coextrusion processes system film can form outermost layer 11, insulating course 12 or outermost layer 11, separator 12, intermediate layer 13 and the innermost layer 14 of laminated structure 10 of the present invention and each adjacent layer of laminated structure 10 is bonded together.When needs, can pass through coated technique, technique for vacuum coating, ultraviolet curing process or electronic beam curing technology etc. form the secondary film.Can adjacent layer be bonded together by methods such as dried laminated process, extruding laminated process, coextrusion laminated process or heat laminating technologies.

Dried lamination by using common adhesive (being used for dried lamination) can be with insulating course 12 outsides stacked.Be preferably, use to have the layer laminate of the adhesive of following description component insulating course 12 inboards.

When the laminated structure 10 that forms the lithium battery package body is by dried laminated process when bonding, following problem may take place: because as the splitting delamination due to the polycarbonate solution of the electrolyte ingredient of lithium battery 1, and since due to the hydrofluoric acid that lithium salts and water reaction generate the adhesive surface on insulating course 12 innermost surface peel off etc.To with these problems inventor through conscientiously discovering: carry out dried lamination by the adhesive that inboard each layer usefulness of the insulating course 12 of laminated structure 10 are had following composition and just can prevent above-mentioned splitting and peel off delamination, and can form laminated structure with excellent heat resistance at the lip-deep adhesive surface of insulating course.

Adhesive is made up of host and curing agent.Host is made up of the blending resin that is mylar and bisphenol A type epoxy resin, mylar contains sour composition and pure composition, sour composition wherein contains at least two kinds in decanedioic acid, M-phthalic acid, terephthalic acid (TPA), suberic acid, azelaic acid, 11 carbon diacid and the hexadecylic acid, and wherein pure composition contains at least a in ethylene glycol, hexylene glycol and the diethylene glycol (DEG).Curing agent comprises PIC composition (TDI, MDI, IPDI, HDI or XDI).By in adhesive, suitably adding resistance to chemical reagents and the organic solvent resistance that silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate and/or barium chromate zinc etc. can further strengthen adhesive.

Below be two exemplary process that form by three layers of laminated structure of the present invention 10 of forming.

1) a kind of method forms the laminated structure that is formed by outermost layer 11 and insulating course 12 by extruding lamination or heat laminating, with separator one side and the dried lamination of innermost layer of this laminated body.

2) with outermost layer 11, insulating course 12 and innermost layer 14 laminations get up a kind of method by dried lamination.

Adhesive with composition of the present invention is used to above-mentioned dried lamination (following identical).

Below be two exemplary process that form by four layers of laminated structure of the present invention 10 of forming.

1) a kind of method, with optional approach form the laminated structure formed by outermost layer 11 and insulating course 12 respectively and with it as the first son structure, by insulating course one side of win structure and intermediate layer/innermost layer is formed laminated structure and with it as the second son structure, by dried lamination first and second sons are constructed laminations and get up.Adhesive with composition of the present invention is used to the dried lamination with intermediate layer 13 and innermost layer 14.

2) pass through dried lamination with outermost layer 11, insulating course 12, intermediate layer 13 and innermost layer 14 laminations get up.Adhesive with composition of the present invention is used to the dried lamination with insulating course 12 and intermediate layer 13, intermediate layer and innermost layer 14.

Can use any method in the present invention.

Can apply on intermediate layer 13 and prevent gas, the film of liquid and ion penetration passes through the infiltration of insulating course 12 so that prevent electrolyte ingredient, more guarantees stable adhesive strength.The such metallic film of aluminium film that this film is to use (cathode) sputtering technology, chemical vapor deposition or physical vapor deposition to form; Metal oxide layer as aluminium oxide or tin oxide film; And, or the vinylidene chloride layer that forms by coated technique.

Embodiment

The layer structure that specifically describes laminated body of the present invention as packing bag and compression molding packing box respectively is as follows.In the following description, the breviary symbol of use is as follows.

[breviary symbol DL: dried lamination, TL: heat laminating, AL: aluminium foil, NY: nylon, HOMO-PP: homopolymerization type polypropylene, //: coextrusion, Tr-Ac: phosphate treatment, Tr-Co-Pac-Cr: add the acid treatment of calcium carbonate chromium phosphate, RAM-PP: the numeral in () behind random polypropylene film, the breviary symbol is the thickness μ m of layer]

It below is the composition that is used for each adhesive of dried lamination.

DL-1:Takerakku A969V/A-5 (military field pharmaceutical industries corporate system, trade name) is with the adhesive of polyether resin as main component

DL-2: form by host and curing agent, use polyester polyurethane resin to contain carboxylic acid such as decanedioic acid, M-phthalic acid, terephthalic acid (TPA), dihydroxylic alcohols such as ethylene glycol or hexylene glycol, isocyanates (IPDI) and formed as host, as curing agent use trimethylolpropane by the epoxy resin that bisphenol-A is formed; Dihydroxylic alcohols such as propylene glycol, DPG, glycerol or 1,3-butanediol, isocyanates (TDI); Other (TDA).

Can enumerate following three examples as the laminated structure of bag type:

Embodiment 1

With the dried lay-up method that uses adhesive DL-1 the thick double axial orientated polyester film of 12 μ m is laminated on the thick aluminium foil of 20 μ m.With the dried lay-up method that uses adhesive DL-2 the thick double axial orientated polyester film of 12 μ m is laminated on this aluminium foil.The dried lay-up method unsaturated carboxylic acid graft polypropylene screen that 50 μ m are thick with use adhesive DL-2 is laminated on the double axial orientated polyester film again, thereby finishes the laminated structure (1) among the embodiment 1.

Laminated structure (1)

PET(12)/DL-1/AL(20)/DL-2/PET(12)/DL-2/PPa(50)

Embodiment 2

Thereby be laminated to formation lamination A together by dried lay-up method double axial orientated polyester film and the thick aluminium foil of 20 μ m that 12 μ m are thick that uses adhesive DL-1.By the dried lay-up method unsaturated carboxylic acid graft polypropylene screen that 20 μ m are thick of use adhesive DL-2, thereby thick double axial orientated polyester film and the thick unsaturated carboxylic acid graft polypropylene screen of 50 μ m of 12 μ m is laminated to formation lamination B together.Thereby the thick unsaturated carboxylic acid graft polypropylene of the 20 μ m face of aluminium foil surface among the lamination A and lamination B is bonded together the laminated structure of finishing among the embodiment 2 (2) by the heat laminating method.The condition of heat laminating technology is a temperature: 220 ℃, and pressure: 0.5 Mpa and linear velocity: 30m/min.

Laminated structure (2)

PET(12)/DL-1/AL(20)/TL/PPa(20)/DL-2/PET(12)/DL-2/PPa(50)

Embodiment 3

After forming acid resistance upgrading film on the thick aluminium foil of 20 μ m, use the dried lay-up method of adhesive DL-1 that the thick double axial orientated polyester film of 12 μ m is laminated on the aluminium foil with phosphate treatment, thereby form lamination A.Form the two membranes of forming by random polypropylene film and homo-polypropylene film by coetrusion, the dried lay-up method by using adhesive DL-2 with this two membranes (by coextrusion formation) thus the random polypropylene face be adhered on the aluminium foil surface of lamination A and finish laminated structure (3).

Laminated structure (3)

PET(12)/DL-1/AL(20)/Tr-Ac/DL-2/RAM-PP(5)//HOMO-PP(25)

Be used to have the laminated structure of concavo-convex mold pressing package-type, following three examples arranged:

Embodiment 4

With the dried lay-up method that uses adhesive DL-1 with the thick double axial orientated polyester film of 12 μ m, thereby thick biaxial oriented nylon film of 15 μ m and the thick aluminium foil of 50 μ m are bonded together in proper order and form lamination A.Thereby polyester film that the dried lay-up method that uses adhesive DL-2 is thick with 16 μ m and the unsaturated carboxylic acid graft polyethylene of 50 μ m are adhered in proper order on the aluminium foil surface of lamination A and finish laminated structure (4).

Laminated structure (4)

PET(12)/DL-1/NY(15)/DL-1/AL(50)/DL-2/PET(16)/DL-2/PEa(50)

Embodiment 5

With the dried lay-up method that uses adhesive DL-1 with the thick double axial orientated polyester film of 12 μ m, thereby thick biaxial oriented nylon film of 15 μ m and the thick aluminium foil of 50 μ m are laminated in proper order and form lamination A together.With the dried lay-up method unsaturated carboxylic acid graft polyethylene film that 20 μ m are thick of use adhesive DL-2, thereby thick biaxial orientation copolyester film and the thick unsaturated carboxylic acid graft polyethylene film of 50 μ m of 16 μ m is bonded together formation lamination B in proper order.Thereby by heat laminating technology the thick unsaturated carboxylic acid graft polyethylene film of 20 μ m of the aluminium foil surface of lamination A and lamination B is bonded together and finishes laminated structure (5).The condition of heat laminating technology is a temperature: 230 ℃, and pressure: 0.3 Mpa and linear velocity: 25m/min.

Laminated structure (5)

PET(12)/DL-1/NY(15)/DL-1/AL(50)/TL/PEa(20)/DL-2/PET(16)/DL-2/PEa(50)

Embodiment 6

With the dried lay-up method that uses adhesive DL-1 with the thick polyester film of 6 μ m, the aluminium foil that biaxial oriented nylon film that 15 μ m are thick and 50 μ m are thick (through chromium phosphate acid treatment calciferous) thus order is bonded together and forms lamination A.In addition, form the two membranes of forming by random polypropylene film and homo-polypropylene film by coetrusion, and the dried lay-up method by using adhesive DL-2 is adhered to the random polypropylene face of two membranes on the aluminium foil surface of lamination A, thereby forms laminated structure (6).

Laminated structure (6)

PET(6)/DL-1/NY(15)/DL-1/AL(50)Tr-Co-PAc-cr/DL-2/RAM-PP(5)//HOMO-PP(25)

The PET as the intermediate layer in laminated structure (4) and (5) (16) is a pet copolymer.

Arrive in the structure of layer shown in (6) at laminated structure (1), the adhesive DL-2 that use has a composition of the present invention is bonded together each layer of 14 one sides of innermost layer of insulating course 12, and uses the adhesive DL-1 with common constituent that each layer of the insulating course outside is bonded together.

Arrive (6) as the packaging material for lithium battery box with laminated structure (1),, this lithium battery has been done test the lithium battery body seal.The performance of these laminated structures can satisfy all requirements of lithium battery package body.

Owing to use and have the formed laminated structure of adhesive of composition of the present invention as the lithium battery packaging material, laminated structure does not have to occur delamination owing to the effect of contained polycarbonate solvent in the lithium battery main body at adhesive layer, and each layer that is adhered to innermost layer one side surface of insulating course more do not have owing to the negative interaction of hydrofluoric acid (the aqueous vapor reaction by lithium salts that comprises in the lithium battery main body and infiltration lithium battery produces) is peeled off.Because packing bag (being formed by lithium battery packaging material of the present invention) makes lithium battery keep flexible, the lithium battery of comparable use metal can is light, and can make the gross thickness attenuate, has reduced the space that must be used to hold battery.Battery packaging material of the present invention has high barrier character, can keep this barrier character for a long time, and has good thermal endurance, cold resistance and anti-content rerum natura.

The 7th embodiment

Various details the 7th embodiment.The 7th embodiment just structurally has difference with identical to a great extent with the 6th embodiment of prior figures 1 to 6 explanation.Therefore, describe the 7th embodiment, will represent and such description will be omitted with identical reference marks with part similar or corresponding in the 6th embodiment with reference to Fig. 1 to 6.

Below describe by Fig. 1～6, protective layer 15 also can comprise phosphate layer formed substance (as trbasic zinc phosphate, ferric phosphate, manganese phosphate, calcium phosphate, chromium phosphate, chromic acid silicon), fluoride films formed substance (titanium fluoride or zinc fluoride) and/or improve the material of aluminium foil surface adhesion characteristic (as coupling agent: silane coupler, organic titanium coupling agent or organo-aluminium coupling agent).

In protective layer 15, add silicon dioxide (chemical formula: SiO ₂), calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc can further strengthen the resistance to chemical reagents and the organic solvent resistance of protective layer 15 effectively.Particularly silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc etc. can be with hydrogen fluoride (HF) thus reaction absorbs and absorption hydrogen fluoride (hydrogen fluoride is electrolyte and aqueous vapor reaction generation), can prevent that particularly the hydrogen fluoride that is caused by hydrogen fluoride from corroding insulating course (aluminium foil).

The innermost layer 14 of lithium battery packaging material of the present invention is made up of resin, this melting point resin is more than 70 ℃, Vicat softening point is more than 60 ℃, these resins such as olefin resin, the unsaturated carboxylic acid graft vistanex, the metal ion crosslinked polyvinyl resin, the copolymer of the copolymer of ethene or propylene and acrylic acid derivative or ethene or propylene and methacrylic acid derivative and the derivative of these resins or mixture, and innermost layer thickness is more than the 20 μ m.

The innermost layer 14 of packing bag or mold pressing packing box all is to form sealing system under the state of electrode nipple being clamped with deposited method.Yet, become fragile and form crackle and pin hole easily herein as the deposited part of the olefin resin of innermost layer.When innermost layer and electrode during with tab 16 end weldings, in order to prevent to form pin hole, the thickness of innermost layer will reduce, and the value that reduces is corresponding with the thickness of the tab 16 of covering joint.If in order to strengthen the thermal endurance of innermost layer, be by having dystectic individual layer olefin resin when forming, must using high pressure and high temperature so that innermost layer is fused to together for a long time to innermost layer by heat-sealing as innermost layer.Because the relation of heat, such fusion joining process has reduced the quality characteristic of lithium battery main body within it, and owing to cause other layer (as the outermost layer of mylar or nylon resin composition) thermal contraction takes place, thereby also damaged the function as packaging material.

To have carried out various researchs and found be effective because innermost layer is made the multi-ply construction of being made up of ground floor 14a and second layer 14b to addressing this problem to the inventor in order to address this problem.More specifically, the multiple stratification of innermost layer is:

(1) olefin resin and olefin resin modifier film/unsaturated carboxylic acid graft polyolefin film

(2) co-polymer membrane of the copolymer of olefin resin and olefin resin modifier film/ethene and acrylic acid derivative or ethene and methacrylic acid derivative

(3) olefin resin and olefin resin derivatives membrane/metal ion crosslinked polyethylene, metal ion crosslinked polypropylene screen

Have as representational olefin resin:

A) acrylic resin

1) homo-polypropylene (fusing point: more than 150 ℃, Vicat softening point: more than 140 ℃)

2) ethylene-propylene copolymer (having fusing point is more than 110 ℃, and Vicat softening point is atactic propene or the grafted propylene copolymer more than 100 ℃)

B) polyvinyl resin

3) low density polyethylene (LDPE), medium density polyethylene, high density polyethylene (HDPE), LLDPE, ethylene-propylene-diene copolymer, ethylene-propylene-butylene copolymer, use the ethene-alpha-olefin copolymer that the single-point catalyst polymerization produces (fusing point: more than 90 ℃, Vicat softening point: 80 ℃)

Acid-modified polyolefin resin (fusing point: more than 90 ℃, Vicat softening point: 80 ℃) have:

A) vinyl-vinyl acetate copolymer

B) metal ion crosslinked polyethylene, metal ion crosslinked polypropylene

C) the unsaturated carboxylic acid graft polyolefin comprises the modifier of unsaturated carboxylic acid graft polyethylene, unsaturated carboxylic acid graft polypropylene and unsaturated carboxylic acid graft polymethylpentene and these polymer

D) as what ethene or propylene and methacrylic acid derivative or methacrylic acid derivative copolymer can be enumerated ethylene-methyl methacrylate methyl terpolymer (EMMA), ethylene-methyl methacrylate ethyl ester copolymer (EMA), ethylene-methyl acrylate copolymer (EMAA), ethylene-ethyl acrylate copolymer (EEA), vinyl-acrylate copolymer (EAA), propylene-EMA (PMA) and propylene-ethyl acrylate (PAA) etc. are arranged.

As the more specifically example of the multiple stratification of innermost layer 14, that can enumerate has a following formation:

(1) copolymer of low density polyethylene (LDPE) or LLDPE/ethene and methacrylic acid derivative or acrylic acid derivative

(2) copolymer of ethylene-propylene copolymer/propylene and methacrylic acid derivative or acrylic acid derivative

(3) low density polyethylene (LDPE) or LLDPE/metal corsslinking polyethylene

(4) ethylene-propylene copolymer/metal corsslinking polypropylene

(5) atactic propene/unsaturated carboxylic acid graft homo-polypropylene

(6) grafted propylene/unsaturated carboxylic acid graft homo-polypropylene

(7) homo-polypropylene/unsaturated carboxylic acid graft atactic propene or grafted propylene

(8) atactic propene or grafted propylene/homo-polypropylene

(9) ethylene-propylene copolymer/polyethylene/vinyl-propylene copolymer

(10) ethylene-propylene copolymer/polyethylene/unsaturated carboxylic acid graft polyethylene

By T pattern extrusion coating technology, inflatable technology or coextrusion processes etc. can form outermost layer 11, insulating course 12, innermost layer 14 or outermost layer 11, insulating course 12, intermediate layer 13 and the innermost layer 14 of lithium battery packaging material among the present invention and they are laminated to together.When needs, can pass through coated technique, evaporation process, ultraviolet curing process or electronic beam curing technology etc. and form the secondary film.

Can adjacent layer be bonded together by dried laminated process, extruding laminated process, coextrusion laminated process or heat laminating technology.

The adhesive that can be used for dried lamination is a polyester binder, polyethyleneimine: amine bonding agent, polyethers adhesive, cyanoacrylate adhesive, urethane adhesives, organic titanic compound adhesive, polyethers-urethane adhesives, epobond epoxyn, polyester-urethane adhesives, acid imide adhesive, isocyanate adhesive, polyolefin-based adhesive and silicone adhesive.Adhesive with aforementioned composition is used to the dried lamination of innermost layer one side of insulating course.

When the laminated structure that forms the lithium battery packing is when finishing by dried laminated process, following problem may take place: promptly since as the splitting due to the polycarbonate solvent of lithium cell electrolyte and since the lip-deep bonding aspect that acts on insulating course innermost layer one side of the hydrofluoric acid that lithium salts and water reaction generate peel off.The present inventor is through conscientiously discovering: carry out dried lamination by the adhesive that inboard each layer usefulness of the insulating course of laminated structure is had following composition and just can prevent that above-mentioned splitting and the adhesive surface on insulation surface from peeling off.

Adhesive is made up of host and curing agent, and host is made up of carboxylic acid, dihydroxylic alcohols and isocyanates, carboxylic acid wherein such as decanedioic acid, M-phthalic acid, terephthalic acid (TPA), suberic acid, azelaic acid, 11 carbon diacid and hexadecylic acids; Wherein dihydroxylic alcohols such as ethylene glycol, hexylene glycol and diethylene glycol; Isocyanates wherein such as IPDI etc.Curing agent is formed dihydroxylic alcohols wherein such as trimethylolpropane, propylene glycol, DPG, glycerol, 1,3 butanediol by dihydroxylic alcohols, isocyanates and TDA etc.; Isocyanates such as TDI etc.

In these adhesive layers, suitably add silicon dioxide (SiO ₂), calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc etc. can further improve chemical proofing and organic solvent resistance.Particularly, silicon dioxide, calcium carbonate, zinc, red lead, lead monoxide, cyanamide zinc-lead oxide, zinc chromate, barium potassium chromate or barium chromate zinc etc. can be with hydrogen fluoride (HF) thus reaction absorbs and absorption hydrogen fluoride, hydrogen fluoride are electrolyte and reaction of moisture generation.

Dried stack adhesive with aforementioned composition can be used to each layer that than insulating course is more innermost layer one side bonding.But also can use common adhesive (being used for dried lamination) dried laminated process will than insulating course more the outside each layer laminate.

When coming adjacent each layer of lamination by the extruding lamination, can on the adhesive surface of each layer, apply the resin bed of thick about 1 μ m, perhaps carrying out surface activation with ozone treatment etc. handles, this layer resin is polyester binder, the polyethers adhesive, urethane adhesives, polyethers-urethane adhesives, polyester-urethane adhesives, isocyanate adhesive, polyolefin-based adhesive, polyethylene-imines adhesive, cyanoacrylate adhesive, the organic titanic compound adhesive, epoxy adhesive, the acid imide adhesive, the modifier of silicone adhesive and these adhesives or the mixture of these adhesives, thereby the stable bonding strength that promotes each bonded interlayer.

Resin during as above-mentioned coextrusion lamination or heat laminating uses the unsaturated carboxylic acid graft vistanex, thereby improves adhesiveness and improved anti-content rerum natura.

Embodiment

More than the layer of Shuo Ming laminated body of the present invention constitutes, and gives having of concrete example respectively as packaging bag build, concavo-convex mold pressing build:

As packaging bag build formula

[breviary symbol: PET: polyester, DL: dried lamination, TL: heat laminating, AL: aluminium foil, PP: polypropylene, Tr-Ac: phosphate surface treatment, RAM-PP: atactic polymerization type polypropylene, HOMO-PP: homopolymerization type polypropylene, Tr-Co-Ac-cr: add the processing of calcium carbonate chromium phosphate, PPa: unsaturated carboxylic acid graft polyethylene, NY: nylon, Ac: acrylic resin, //: the laminate portion of coetrusion, the numeral in () are the thickness μ m of layer]

In addition, the dried lamination that uses in following examples is as described below with adhesive.

DL-1:Takerakku A969V/A-5 (military field pharmaceutical industries corporate system, trade name) is with the adhesive of polyether resin as main component

DL-2: composition is made up of host and curing agent, contains carboxylic acid such as decanedioic acid, M-phthalic acid, terephthalic acid (TPA) as the host polyester polyurethane resin; Dihydroxylic alcohols such as ethylene glycol or hexylene glycol; Isocyanates (IPDI) and contain the epoxy resin of bisphenol-A, as curing agent by trimethylolpropane; Dihydroxylic alcohols such as propylene glycol, DPG, glycerol or 1, the 3-butanediol; Isocyanates (TDI) and other (TDA) form.

Embodiment 1

Thereby be bonded together formation lamination A by dried lay-up method double axial orientated polyester film and the thick aluminium foil lamination of 20 μ m that 12 μ m are thick that uses adhesive DL-1.In addition, by coetrusion with random polypropylene film and unsaturated carboxylic acid graft polypropylene screen system film, the double axial orientated polyester film that dried lay-up method by using adhesive DL-2 is thick with the aluminium face of above-mentioned lamination A and 12 μ m and be glued together with the made random polypropylene face of above-mentioned coetrusion, thus laminated structure (1) among the embodiment 1 finished.

Laminated structure (1)

PET(12)/DL-1/AL(20)/DL-2/PET(12)/DL-2/RAM-PP(30)//PPa(20)

Embodiment 2

Thereby be laminated to formation lamination A together by dried lay-up method double axial orientated polyester film and the thick aluminium foil of 20 μ m that 12 μ m are thick that uses adhesive DL-1.Thereby the double axial orientated polyester film that unsaturated carboxylic acid graft polypropylene screen, 12 μ m that the dried lay-up method by using adhesive DL-2 is thick with 20 μ m are thick and by coetrusion the random polypropylene face of random polypropylene film and unsaturated carboxylic acid graft polypropylene screen system film gained co-extruded films is laminated to and forms lamination B together.Thereby the thick unsaturated carboxylic acid graft polypropylene of the 20 μ m face of aluminium foil surface among the lamination A and lamination B is bonded together the laminated structure of finishing among the embodiment 2 (2) by the heat laminating method.The condition of heat laminating technology is a temperature: 250 ℃, pressure: 0.6Mpa and linear velocity: 20m/min.

Laminated structure (2)

PET(12)/DL-1/AL(20)/TL/PPa(20)/DL-2/PET(12)/DL-2/RAM-PP(25)//PPa(25)

Embodiment 3

After forming the acid resistance Modified Membrane on the thick aluminium foil of 20 μ m, double axial orientated polyester film and above-mentioned aluminium foil that the dried lay-up method by using adhesive DL-1 is thick with 12 μ m are bonding, thereby form lamination A by phosphate treatment.In addition,, will be somebody's turn to do the random polypropylene face that forms by coextrusion by the dried lay-up method that uses adhesive DL-2 and be adhered on the aluminium foil surface of lamination A, thereby finish laminated structure (3) random polypropylene film and homo-polypropylene film system film by coetrusion.

Laminated structure (3)

PET(12)/DL-1/AL(20)/Tr-Ac/DL-2/RAM-PP(5)//HOMO-PP(25)

As concavo-convex compression molding pattern

Embodiment 4

Thereby be laminated to formation lamination A together in proper order by dried lay-up method thick biaxial oriented nylon film and the thick aluminium foil of 50 μ m of double axial orientated polyester film, 15 μ m that 12 μ m are thick that uses adhesive DL-1.In addition, by coetrusion with polyethylene film and unsaturated carboxylic acid graft polyethylene film system film, the polyester film that dried lay-up method by using adhesive DL-2 is thick with the aluminium foil surface of above-mentioned lamination A and 16 μ m and in proper order bonding with the made polyethylene face of coetrusion, thus laminated structure (4) finished.

Laminated structure (4)

PET(12)/DL-1/NY(15)/DL-1/AL(50)/DL-2/PET(16)/DL-2/PE(30)//PEa(20)

Embodiment 5

Thereby be laminated to formation lamination A together by dried lay-up method thick biaxial oriented nylon film and the thick aluminium foil of 50 μ m of double axial orientated polyester film, 15 μ m that 12 μ m are thick that uses adhesive DL-1.Thereby biaxial orientation copolyester film that unsaturated carboxylic acid graft polypropylene screen, 16 μ m that the dried lay-up method by using adhesive DL-2 is thick with 20 μ m are thick and the unsaturated carboxylic acid graft polyethylene film of 50 μ m are laminated in proper order and form lamination B together.Thereby by heat laminating technology the thick unsaturated carboxylic acid graft polyethylene film of 20 μ m of the aluminium foil surface of lamination A and lamination B is bonded together and finishes laminated structure (5).The condition of heat laminating technology is a temperature: 200 to 250 ℃, and pressure: 0.6Mpa and linear velocity: 25m/min.

Laminated structure (5)

PET(12)/DL-1/Ny(15)/DL-1/AL(50)/TL/PPa(20)/DL-2/PET(16)/DL-2/PE(25)//PEa(25)

Embodiment 6

On the outermost surface of the thick biaxial oriented nylon film of 15 μ m, form the thick acrylic resin film of 3 μ m by coated technique.Nylon one side of the biaxial oriented nylon film that aluminium foil (doing surface treatment through chromium phosphate solution calciferous) that the dried lay-up method by using adhesive DL-1 is thick with 50 μ m and 15 μ m are thick is laminated to together, thus formation lamination A.In addition, form the co-extruded films of forming by random polypropylene film and homo-polypropylene film by coetrusion, and the random polypropylene face of the dried lay-up method co-extruded films by using adhesive DL-2 is adhered on the aluminium foil surface of lamination A, thereby forms laminated structure (6).

Laminated structure (6)

AL/DL-1/Ny(15)/DL-1/AL(50)/Tr-Co-Ac-cr/DL-2/RAM-PP(5)//HOMO-PP(25)

The PET of above-mentioned mold pressing packing box (16 μ m) all uses the polyester of copolymerization mould assembly.Again, use the adhesive of above-mentioned DL-1 not limited especially, but in DL-2, will use the adhesive of composition with the invention described above.

Use the packaging material that above-mentioned laminated body (1)～(6) are used as lithium battery, with the sealing of lithium battery body, it has been done various tests, the performance of these laminated body can satisfy all requirements of lithium battery package body.

Owing to use the made laminated body of adhesive of the present invention as the lithium battery packaging material, so the delamination by knitting layer due to institute's carbonate-containing in the lithium battery does not take place, more do not occur on the interior dress face of separator because peeling off due to the hydrogen fluoride, this hydrogen fluoride amount is generated by the lithium salts of lithium battery and the reaction of moisture of invading in the lithium battery.Since use exterior body by the formed bag of packaging material of the present invention, lighter so lithium battery maintenance itself is flexible than the lithium battery that uses metal can, and also the gross thickness attenuate can reduce the space that is used to hold battery.Particularly, as packaging material for lithium battery, its isolation is good, and can keep this isolation, thermal endurance, cold resistance and anti-content rerum natura etc. all good for a long time.

The 8th embodiment

Hereinafter with reference to Figure 10 to 17 eighth embodiment of the invention is described.Figure 10 (a) has shown that to 10 (d) the present invention packs the embodiment of bag, and wherein Figure 10 (a) illustrates the perspective view by two films of heat bonding, and it is the view of the packing bag that formed by heat bonding that Figure 10 (b) illustrates, and Figure 10 (c) is along Figure 10 (b) center line X ₁-X ₁The amplification profile view of being done, Figure 10 (d) are along Figure 10 (b) center line X ₂-X ₂The amplification profile view of being done.Figure 11 (a) shows mold pressing packing box embodiment of the present invention to 11 (c), and wherein Figure 11 (a) illustrates by the matrix band of heat bonding and the perspective view of lid material film, and Figure 11 (b) illustrates with the formed arch package body of heat bonding, and Figure 11 (c) is along Figure 11 (a) center line X ₃-X ₃The amplification profile view of being done, Figure 11 (d) are along Figure 11 (b) center line X ₄-X ₄The amplification profile view of being done.Figure 12 illustrates the configuration example of laminated body, and Figure 12 (a) is the representative section view of three layer laminate tectosomes, and Figure 12 (b) is the representative section view of four layer laminate tectosomes.Figure 13 (a) and 13 (b) show with the perspective view of packaged configuration of the present invention as the lithium battery embodiment of exterior body.Figure 14 (a) and 14 (b) show that wherein Figure 14 (a) is the cross section view of sealing system with the partition system that packaging material were sealed and the ideograph of the intrusion of steam in this system, and Figure 14 (b) is the zoomed-in view of Y part among Figure 14 (a).Figure 15 (a) is the plan view that the present invention of being used for moisture resistance test packs bag (b), and wherein, Figure 15 (a) is its plane graph, and Figure 15 (b) is the cross section view of being done along Figure 15 (a) center line Z-Z.Figure 16 (a) is the view of the embodiment when packaging bag of the present invention is used for the mold pressing packaged form as the exterior body of lithium battery to 16 (e '), wherein Figure 16 (a) and 16 (a ') are the views that the three parts packs bag, Figure 16 (b) and 16 (b ') are the views of quad seals packing bag, Figure 16 (c), 16 (c '), 16 (d), 16 (d '), 16 (e), 16 (e ') are the views of pillow type packing bag, show the another location of the electrode nipple of lithium battery from the exterior body taking-up.Figure 17 (a)～(d) is the enforcement illustration when packaging bag body of the present invention is used for concavo-convex mold pressing type packaged form as the lithium battery exterior body, Figure 17 (a) is the oblique view of matrix band, Figure 17 (a ') is the profile of the X-X portion of Figure 17 (a), Figure 17 (b) shows the exterior body embodiment oblique view with the two sides matrix band, Figure 17 (b ') is the profile of Figure 17 (b), and Figure 17 (c) (d) shows another extracting position of joint on the concavo-convex mold pressing type exterior body.

Of the present invention laminated structure 110 of Figure 12 (a) shown in (b), 110 ' constitute by basic unit's 111/ insulating course, 112/ Thermoadhesive resin bed 113 or basic unit's 111/ insulating course, 112/ intermediate layer, 115/ thermal adhesive resin layer 113, for battery packages bag (external packing body) at above-mentioned lithium battery, use in insulating course 112 grades, 111,112,113 and 115 usefulness adhesive phases 114 are bonded together, make laminated structure 110 and 110 '.

Because in use contact, so basic unit 111 is formed by insulating resin layer basically with equipment (hardware).From prevent laminated structure processing, form the angle of pin hole, wish that basic unit 111 is above thick oriented polyester or the oriented nylon films of 6 μ m.

Insulating course 112 must have high barrier character.In specific words, insulating course 112 preferably metal forming, cut off the metal film or the inorganic oxide film of resin film, vacuum deposition.For example should use as above-mentioned metal forming, the above and iron content of 15 μ m is the aluminium foil more than 0.5%.

Film as the property cut off can be used vinylidene chloride film, acrylonitril membrane and fluorocarbon resin film.Also can use the metal such as aluminium, aluminium oxide, silica of vacuum deposition or the film of inorganic oxide.

Laminated structure 110 ' also intermediate layer 115 can be arranged.The exterior body of lithium battery for example, when lithium battery body 121 being put into exterior body 121 and its periphery heat-sealing formed heat bonding portion 124, thereby wish that intermediate layer 115 comprises that at least one layer thickness is that 10 μ m are above and layer prevent that the tab T of lithium battery main body 121 and insulating course 112 (metal forming) from coming in contact (short circuit) by what mylar, vistanex, nylon resin, fluorocarbon resin were formed.Intermediate layer 115 can be single layer structure or sandwich construction.Like this, make the lithium battery of being formed by packing bag 122 and lithium battery main body 121 120.

When laminated structure 110 or 110 ' be used to form lithium battery packing, because Thermoadhesive resin bed 113 must be able to be adhered on the tab T of lithium battery main body, must be heat-resisting, resist cold, must process (be easy to be processed to form the packing bag or be easy to compression molding), so wishing Thermoadhesive resin bed 113 is the above thick films of 20 μ m, this film is to contain fusing point more than 80 ℃, the unsaturated carboxylic acid graft vistanex of Vicat softening point more than 70 ℃, as the unsaturated carboxylic acid graft polyvinyl resin, the unsaturated carboxylic acid graft acrylic resin, unsaturated carboxylic acid graft polymethylpentene resin.

When the thickness of thermal adhesive resin layer 113 during, when tab two ends with tab T clamping and when sealing the slit take place, battery packages forfeiture barrier character when this slit forms the pin hole that connects less than 20 μ m.When if the fusing point of the material of formation Thermoadhesive resin bed 113 and Vicat softening point are low, this Thermoadhesive resin bed 113 is thermo-labile, frigolabile, and the bonding strength between bonding strength between the Thermoadhesive resin bed 113 and Thermoadhesive resin bed 113 and the tab T is low, thereby packing may be broken.

Composition layer 111,112,113 and 115 to laminated structure of the present invention can carry out surface activation PROCESS FOR TREATMENT or surface passivation technology processing, as corona discharge process, blasting craft, oxidation technology or ozonisation technology, thereby suitably improve and steady customised films, lamination processability and final products secondary workability (mold pressing or bag manufacturing), perhaps in forming layer, add hygroscopicity materials such as drier; Gas occluding such as oxygen, nitrogen, adsorbent; Fire retardant matter; Antistatic, anti-charge species such as carbon, surfactant, inorganic oxide; Conductive material, electromagnetic shielding material etc.; In inorganic, organic, metal-resin, add antioxidant, ultra-violet absorber, charged preventor, anti-caking agent, lubricant (fatty acid amide), fire retardant, inorganic and organic metal additive or carry out aqueous coating.

When laminated structure 110 and 110 ' be used to form lithium battery packing, laminated structure 110 and 110 ' must be the anti-moisture of hypervelocity.As the required air impermeability of lithium battery package body, require following performance:

(1) allow the vapor permeation amount:

60 ℃ and 95%RH condition in next month below 350ppm/7 days

(2) bonding strength between the composition layer:

At interpolation electrolyte and after preserving one month under 60 ℃ of conditions, more than 100g/15mm is wide

(3) electrolyte evaporation capacity:

After preserving one month under 60 ℃ of conditions, below the 20mg

The requirement (2) of the required bonding strength between the above-mentioned composition layer must be satisfied, so that avoid the anti-aqueous vapor characteristic decline that (reaction of moisture by electrolyte ingredient and infiltration packing causes) causes of peeling off owing to bonded each layer, this requirement relates to the necessary condition of the moisture barrier properties comprises of package body.

Require (3) to reduce electrolyte ingredient dissipation internally, it is expected as effect of the present invention.

It below is the reason that vapor permeation is gone into bag (package body) 122.

(a) from multilayer film itself infiltration of the laminated structure that forms package body 122 (comprising pin hole etc.) and intrusion

(b) partly invade from adding the heat bonding in man-hour in the multilayer film heat bonding.

By correctly determine laminated structure 110 and 110 ' the material and the thickness of insulating course 112, can be fully or near the infiltration of the steam that fully prevents to cause owing to reason (a) (be infiltration capacity be zero or near zero).Yet as long as the section of Thermoadhesive resin exists, owing to the caused vapor permeation of reason (b) just has, so the situation of steam infiltration packaging bag 122 is inevitable.

For the moisture resistance inventor that improves package body (sealed) by sealing by discovering, the thickness of the heat bonding portion after laminated structure is bonded be this part bonded before thickness 1/2 or when lower, infiltrate but the phase alleviates by the aqueous vapor of package encapsulation part section, and finish the present invention based on this discovery.

In the bag 122 (lithium battery package body) by laminated structure 110 or 110 ' form, thermal adhesive layer 113 is that the thickness after the heat bonding of innermost layer resin is thermal adhesive layer 113 in 1/2 of the Thermoadhesive resin layer thickness on bonding preceding two sides at least.

Usually, has same thickness and the thermal adhesive layer be made up of same material 113 is bonded together to by heat bonding.Even the thickness difference of two sides Thermoadhesive resin, but itself and be below 1/2, therefore, steam almost can not enter by the end face of stick portion, bag is highly anti-aqueous vapor.

The vapor permeation amount that aqueous vapor is infiltrated bag (being formed by laminated structure) by the multilayer film edge depends on the volume of bonded part, particularly depends on the volume of innermost layer 113 corresponding to bonded part.According to striking gram (Fick) law, as long as the distance that steam moves is fixed, then high molecular infiltration capacity is directly proportional with the thickness of layer.When bond area one regularly, the thickness little person of innermost layer 113 after bonding, the aqueous vapor amount of infiltrating innermost layer 113 is few.That is, form when packing the thickness D of innermost layer before bonding when being bonded together by Thermoadhesive resin innermost layer with laminated structure (as the packaging material laminated structure) ₀Must satisfy inequality: D with the thickness D after the same innermost layer heat bonding ₀/ 2＞D.

When Thermoadhesive resin bed (innermost layer) 113 has fixed thickness, thereby, thermal adhesive layer reduced together that the thickness of innermost layer 113 can reduce the steam that infiltrates packing 122 after the heat bonding by being thermally bonded to.The thing followed is when package body 122 is used as packaging lithium battery, can suppress because therefore the exothermic reaction that lithium battery main body electrolyte absorption moisture is produced, can keep stable electromotive force.

When package body of the present invention is when packing bag, shown in Figure 10 (a), use thermal adhesive layer 113, laminated structure 101 and 102 (laminated structure 110 or 110 ') is stacked toward each other, thereby and by heat bonding the corresponding peripheral part of laminated structure 101 and 102 is combined and to have formed heat bonding part 124.As shown in Figure 10 (c), before heat bonding, the thermal adhesive resin layer segment in laminated structure 101 and 102 peripheral parts has thickness D respectively ₁And D ₂Usually, be used to form D in the laminated structure of packing bag ₁=D ₂In the present invention, as shown in Figure 10 (d), be D owing to heat bonding and by the thickness of the heat bonding portion of deposited Thermoadhesive resin ₀:

D ₀＜(D ₁+D ₂)/2

Figure 11 (a) and 11 (b) show is the peripheral part of lid 103 to be adhered to packaging bag body 122 on the periphery of container 104 (having mold pressing part 105) by heat bonding.In mold pressing type packing bag, to consider that to the material of ground 104 and lid material 103 necessary condition separately designs again.In Figure 11 (c), suppose that concavo-convex mold pressing type container 104 and lid 103 have identical structure and form the material of layer with identical formation, but have different thermal adhesive resin layer thicknesses.Even also form the thickness D of thermal adhesive layer 113 of the laminated structure of container 104 ₂Thickness D much larger than the thermal adhesive layer 113 of the laminated structure that forms lid 103 ₁

The present invention also is applicable to concavo-convex mold pressing packaging bag body.As shown in Figure 11 (d), thereby be thermally bonded to when forming heat bonding portion 124 on the flange 106 of container 104 when lid 104, because the thickness D of the heat bonding portion of heat bonding and deposited Thermoadhesive resin ₀Be:

D ₀＜(D ₁+D ₂)/2

This concavo-convex mold pressing type packaging bag body is different from the laminated structure of above-mentioned packaging bag build, and the Thermoadhesive resin bed of packing box container ground 104 has different thickness respectively with the thermal adhesive resin layer of lid 103.Thereby form on the flange 106 of container 104 when satisfying the heat bonding portion 124 of aforementioned condition when lid 103 is thermally bonded to, the effect of the packing box of concavo-convex compression molding is identical with the effect of bag.

As laminated body of the present invention following formation is arranged specifically.Below be according to laminated structure of the present invention.In the following description, will use the breviary symbol and the following additional symbol that indicate in the previous embodiments explanation to represent film and its method for making.Bracket inner digital behind each layer is represented the thickness (μ m) of each layer.

[breviary symbol Tr-EP: use the antiacid processing of epoxy resin to metal covering, Tr-EP-ME: use the antiacid processing of epoxy resin and melamine resin, and TR-EP+POa: use the antiacid processing of blending resin (by blending epoxy and unsaturated carboxylic acid graft polymer manufacture) to metal covering to metal covering; PET: polyester; AL: aluminium; POa: unsaturated carboxylic acid graft polymer; PE: polyethylene; ON: oriented nylon; Co-PET: polyester copolymer; DL: dried lamination; EC: extruding lamination; TL: heat laminating; //: coextrusion.]

The stromatolithic structure style that " A " forms by dried lamination or coextrusion lamination

＜packaging bag mode 〉

1.PET(12)/DL/ON(15)/DL/AL-Tr-EP(20)/DL/PET(12)/DL/POa(50)

2.PET(12)/EC/PE(15)/EC/AL-Tr-EP(20)/DL/PET(12)/DL/POa(50)

3.ON(15)/DL/AL-Tr-EP(20)/DL/PET(12)/DL/POa(50)

4.ON(15)/EC/PE(15)/EC/AL-Tr-EP(20)/DL/PET(12)/DL/POa(50)

5.ON(12)/DL/AL-Tr-EP-ME(20)/DL/PET(12)/DL/POa(50)

6.ON(12)/DL/AL-Tr-EP+POa(20)/DL/PET(12)/DL/POa(50)

＜concavo-convex compression molding manner of packing 〉

7.Co-PET(16)/DL/ON(15)/DL/AL-Tr-EP(20)/DL/Co-PET(16)/DL/POa(50)

8.Co-PET(16)/EC/PE(15)/EC/AL-Tr-EP(20)/DL/Co-PET(16)/DL/POa(50)

9.ON(25)/DL/AL-Tr-EP(40)/DL/Co-PET(16)/DL/POa(50)

10.ON(25)/EC/PE(15)/EC/AL-Tr-EP(40)/DL/Co-PET(16)/DL/POa(50)

11.ON(25)/DL/AL-Tr-EP-ME(40)/DL/Co-PET(16)/DL/POa(50)

12.ON(25)/DL/AL-Tr-EP+POa(20)/DL/Co-PET(16)/DL/POa(50)

＜packaging bag mode 〉

1.ON(15)/DL/AL-Tr-EP(20)/TL/POa(20)/DL/PET(12)/DL/POa(50)

2.ON(15)/DL/AL-Tr-EP(20)/TL/POa(20)/EC/PET(12)/DL/POa(50)

3.ON(15)/DL/AL-Tr-EP(20)/TL/POa(20)/EC/PET(12)/EC/PET(12)/EC/POa(50)

4.ON(15)/DL/AL-Tr-EP(20)/TL/POa(20)//PMa(20)//TPX(20)//PMa(20)//POa(50)

5.ON(15)/DL/AL-Tr-POa(20)/TL/POa(20)/DL/PET(12)/DL/POa(50)

6.ON(15)/DL/AL-Tr-POa(20)/TL/POa(15)//PP(15)//POa(50)

7.ON(15)/DL/AL-Tr-Tr-EP-ME(20)/TL/POa(20)/EC/PET(12)/DL/POa(50)

8.ON(15)/DL/AL-Tr-Tr-EP+POa(20)/TL/POa(20)/EC/PET(12)/DL/POa(50)

＜concavo-convex compression molding manner of packing 〉

The laminated structure that is used to form the mold pressing packing box is similar to the laminated structure that is used to form the packing bag, replaces the PET in the above-mentioned dried lamination-type and only is listed below representational laminated structure except using Co-PET.

1.ON(25)/DL/AL-Tr-EP(40)/TL/POa(20)/DL/Co-PET(16)/DL/POa(50)

2.ON(25)/DL/AL-Tr-EP(40)/TL/POa(20)/EC/Co-PET(16)/DL/POa(50)

3.ON(25)/DL/AL-Tr-EP(40)/TL/POa(15)//PP(15)/POa(50)

When packaging bag body of the present invention was used as lithium battery, the form of exterior body 122 had packaging bag mode or mold pressing packing box mode.The packaging bag mode is except that aforesaid pillow type, also just like three side seals types shown in Figure 16 (a), four side closed type shown in Figure 16 (b).Each form all is that the sealing of its heat bonding portion contains the part of joint (electrode) T and the part of joint T is stretched out from the hermetic unit of packing bag.As Figure 16 (c), shown in 16 (d) and 16 (e), joint can stretch out from the optional position of packing 122 heat bonding portions.

As Figure 11 (a) (b), as shown in 17 (a), 17 (a '), 17 (c) and 17 (d), mold pressing packing box exterior body 122 is by container 104 and lid 103 assemblies, this container has the mold pressing part 105 of holding lithium battery main body 121, and this lid 103 is near the flange 106 of container 104.Be preferably, outermost layer 111 and/or the intermediate layer 115 be made up of the laminated structure that forms container 104 and lid 103 respectively are that used mylar is pet copolymer or polybutylene terephthalate (PBT) copolymer, and the extension ratio in filming is advisable with little person.When using such co-polymer membrane, the forming shape of container 104 is sharp-pointed shape.Can form container easily, when forming container, ratio D/T is more than 1/50 in this container shapes, and wherein T is that the open end width and the D of container 104 are degree of depth of container 104 (Figure 17 (a ')), and sidewall tilts with the tiltangle below 130 °.The aluminum foil thickness that hope is used to form insulating course 112 is 30 μ m or thicker, so that prevent owing to pin hole takes place in moulding.Because the lid 103 that is adhered on the container 104 is not molded, so need not to be copolymer.Container 104 with mold pressing part 105 is formed by laminated structure.

Shown in Figure 17 (b) and 17 (b '), package body 122 also can be made of a pair of container 104 with mold pressing portion 105.

Mold pressing battery packages body 122 can contain lithium battery main body 121 smoothly.Tab T about concavo-convex mold pressing type package body 122 is also same with the bag type, as Figure 166 (c), and 16 (c '), shown in 16 (d) and 16 (d '), tab T also can be stretched out by the optional position of the heat-sealing portion 124 of exterior body 122.

Embodiment

In order to confirm the effect of package bag of the present invention,, confirm its in fact raising of moisture resistance by the following sample of the resin bed different-thickness with the heat bonding of heat bonding that makes.

Making of packaging material

Biaxial oriented nylon film 111 and the thick aluminium foil 112 of 50 μ m 25 μ m are thick by dried lay-up method are laminated to together.Shown in Figure 15 (b), be laminated on the aluminium foil 112 by the dried lay-up method Thermoadhesive resin bed 113 that 30 μ m are thick (cast polypropylene film) order more bonding, thereby form three layer laminate tectosomes 110.

ON25μm/DL/AL50μm/DL/CCP30μm

The packaging bag shape

Make the three side seals packing bag 122 of size as shown in Figure 15 (a) as the bag shape.Each packing bag 122 has 5mm wide 124a of heat seal portion and 124b.Put into filler in each bag 122 after, the part heat-sealing at the 124c of heat-sealing portion forms the wide hermetic unit of 20mm.Thickness with regulation forms heat sealing part 124a and 124b, and forming the about 20 μ m width of thickness put into filler in bag 122 after is that the heat sealing part 124c of 20mm allows steam to infiltrate the factor of bag 122 by the heat sealing part edge so that weaken.Done in fact from the comparative test of the vapor permeation of the 7a of heat-sealing portion, 7b section.

The making of sample

When forming the bag 122 of above-mentioned specification with heat-sealing, by the control temperature and pressure, form cast polypropylene film with different-thickness, with this as sample.

Sample NO.1:60 μ m

Sample NO.2:40 μ m

Sample NO.3:20 μ m

The condition of moistureproof aptitude tests and accelerated test

With 1: 1: 1 blending ratio DEC (diethyl carbonate), DMC (dimethyl carbonate) and EC (ethyl carbonate) are mixed with electrolyte, with this electrolyte sealability in the sample packaging bag.The sample bag was preserved under 80 ℃ and 90%RH constant temperature and humidity condition after 7 days, measured by karl fischer method and was included in electrolytical moisture in the bag.

The result

Numbering	Sample	The initial stage water content	Water content after the accelerated test
				No.1	60μm	50ppm	450ppm
No.2	40μm	50ppm	350ppm
				No.3	20μm	50ppm	250ppm

Every increase by the 20 μ m of the thickness of sealing, the electrolyte moisture increases 100ppm.

Usually, shown in Figure 14 (a) and 14 (b), in following three forms, gas comprises in the infiltration bags 122 such as steam (heat bonding part 124 is arranged).At form W ₂In, steam partly infiltrates bag 122 by the unsealing of the laminated structure 110 of formation bag 122 (be used for sealed lithiam battery main body 121, this main body stands the steam influence).At form W ₃In, steam infiltrates bag 122 by the pin hole that forms in heat bonding part 124.At form W ₁In, steam sees through thermal adhesive resin layer 113 infiltration bag 122 from the edge of heat bonding portion 124.Wherein, see through the possibility height that Thermoadhesive resin bed 113 infiltrates bag 122.

According to the present invention, as mentioned above,, can prevent in advance that particularly moisture from infiltrating by the edge of heat bonding part 124, therefore can prevent the moisture of invading in packing bag 112 because the thickness of heat bonding portion 124 is made as above regulation.

At least one side is with the reduced thickness (laminated body that this package body use is made of the Thermoadhesive resin of the above-mentioned Thermoadhesive resin bed of package body heat bonding portion, constitute sealing system with heat viscosity method), then can be made into the package body with height moisture resistance, this packing physical efficiency is widely used in packaged food, medicine, chemicals etc.The present invention's packing as the lithium battery packing can effectively prevent because aqueous vapor is infiltrated the lithium battery decreased performance that lithium battery causes, and can avoid peeling off caused trouble by package body.

The 9th embodiment

With reference to Figure 18 to 24 ninth embodiment of the invention is described.It here is the lithium battery packing box that the present invention of sealed lithiam battery packs bag.

Figure 18 (a) is the perspective view of lithium battery and lithium battery body, and Figure 18 (b) is along Figure 18 (a) center line X ₁-X ₁The cross section view of being done, Figure 18 (c) are Y among Figure 18 (b) ₁The zoomed-in view of part, Figure 19 (a) and 19 (b) they are the auxiliary views that is used to explain lithium battery production method of the present invention, and wherein Figure 19 (a) is placed on the auxiliary perspective view of packing in the bag with the lithium battery main body, and Figure 19 (b) is Y among Figure 19 (a) ₂The zoomed-in view of part, Figure 20 (a) is along Figure 19 (b) center line X ₂-X ₂The cross section view of being done, Figure 20 (b) are along Figure 19 (b) center line X ₃-X ₃The cross section view of being done, Figure 21 is the auxiliary view that is used to explain another lithium battery packing method of the present invention, Figure 22 (a) is the view of the various packing bags of battery of the present invention to 22 (d '), and Figure 23 (a) and 23 (b) are the representative section views of laminated structure material of the present invention.

As the packing bag 205 of lithium battery 201 of the present invention, at least one mask has heat sealability to be formed by laminated structure 220, and this laminated structure has at least one heat sealable surface and has the necessary various protective values of lithium battery 201 functions of maintenance.

Particularly, thus the reactions such as electrolyte of infiltrating the aqueous vapor of lithium battery 201 and lithium battery 201 have damaged the function of lithium battery 201.Therefore, the laminated structure that forms packing bag 205 preferably uses the above thick aluminium foil 222 of 20 μ m at least.

Lithium battery 201 can be used for providing energy for distinct electronic apparatuses.As shown in Figure 18 (a), lithium battery main body 202 is packaged in and forms lithium battery 201 in the bag 205.As shown in Figure 18 (a), the deposit terminal 203 that lithium battery main body 202 has a laminal matrix part 204 and stretches out from the one side.

Bag (lithium battery packing) 205 must be sealed in lithium battery main body 202 wherein fully, has only joint 203 part from bag 205 to stretch out.

Shown in Figure 19 (a) and 19 (b), bag 205 is made up of preceding sealing 207 and back sealing 208.Should before sealing be formed at joint 203 1 sides that an end is a lithium battery main body 201, this back sealing 208 is formed at the other end relative with first hermetic terminal 207.Bag 205 is connected in preceding sealing 207 extensions and with unsealing portion 209.Form grooving 212 respectively at unsealing portion 209 two ends.

Shown in Figure 18 (c), a pair of thin slice 210 that forms unsealing part 209 folds back respectively and forms folding part 210.Use adhesive layer 211 that folding part 210 is adhered on the coincidence face of laminated structure 220 (Figure 23 (a) and 23 (b)).Therefore, on bag 205 end faces of projection electrode joint 203, the section that is used as the insulating course 222 of conductive layer does not come out, and therefore, joint 203 can not take place because the short circuit that aluminium foil 222 is caused.

Shown in Figure 19 (b), can form grooving 212 by the two ends of cutting unsealing part 209.After grooving 212 helps a pair of thin slice with unsealing part 209 and is folded to.

Below explain the method for packaging lithium battery.As shown in Figure 19 (a), the formation barrel-shaped structure is pulled out with laminated structure 220 in the limit, and the limit is sent into lithium battery main body 202 in the barrel-shaped structure of laminated structure 220, and overlapping side portion is stitched 206 places is bonded together after sealing.In order to make laminated structure 220 driving fits, best near top boom before being about to sealing in the lithium battery body.Its method does not show that in the drawings when stitching 206 after forming sealing, the coincidence lateral section of laminated structure is sandwiched between the rotation rubber roller so that laminated structure can not fluff.

When the tubular article shaped of lithium battery main body 202 being sent into packing bag 205, up to forming hermetic terminal 207 and at 208 o'clock, in order to prevent lithium battery main body 202 displacement of bag 205 relatively in the longitudinal direction, as shown in figure 21, hope is after putting into the tubular forming part with lithium battery body 202, use tack welding to take over the baton laminated structure 220 is glued together at sealing 207 and electrode nipple 203, thus the fixing position of lithium battery main body 202 and laminated body 220.Subsequently, will seal 206 sealings of back seam after, before forming respectively with the heat seal bars of the heat seal bars 216 of non-electrode nipple one side and electrode nipple one side sealing 207 and after sealing 208.Though only shown each heat seal bars in Figure 21, in fact each hot sealing device comprises heat seal bars and pressure plare.

Because form hermetic terminal 207 and 208, lithium battery main body 202 can pack in bag 105.As shown in Figure 19 (b), divide in the other side of stick portion 209 not (this part is extended between preceding sealing 207 and back sealing 208) to form grooving 212.From produce the angle of lithium battery with high production rate, preferably form hermetic terminal 207 and 208 and grooving 212 simultaneously.Yet, also can and form grooving 212 before forming sealing 207 and 208 afterwards again.Also can establishing grooving again after each package body cutting-out again.After being provided with of grooving 212 is beneficial to thin slice with a pair of not bonding part 209 and is folded to.

Because sealing 207 and back sealing 208 before forming shown in Figure 19 (a), thereby separate each packing bag 205 along line of cut 213 cutting laminated structures 220 from laminated structure 220.

As shown in Figure 18 (b) and 18 (c), the unsealing part 209 of each bag under the cutting is folding laterally respectively, form folding part 210, and make folding part 210 bonding with the superposed surfaces part of laminated structure 220.Fold plane bonding is bonding with the adhesive of hot melt or double-sided belt etc., and forms bonding part 211.

Because the not bonding part 209 of end is folding, the end face of the electrode nipple exposed division of bag 205 only forms hot sealing layer 223, therefore, need not worry contacting and short circuit (Figure 23 (a) (b)) of the metal insulating course 222 that exposes at the bag end face and electrode nipple 203.

Except above-mentioned pillow type packing bag, the different types bag shown in lithium battery packaged configuration Figure 22 of the present invention is also applicable.

What for example show respectively among Figure 22 (a), 22 (b), 22 (c) and 22 (d) is the lithium battery with three side seals bags 205; Lithium battery with four side sealing bag 205; With lithium battery with pillow type bag body 205.In the lithium battery as shown in Figure 22 (d) with pillow type bag body 205, at this moment, joint 203 stretches out from sealing back seam 206, the part of joint 203 is adhered to after the sealing of bag 205 on the seam 206, and it is folding with this unsealing portion that the end is formed unsealing part 209, forms folding part 210.

Because pillow type packing can closely cooperate with the lithium battery main body and can be used for automation battery packages technology easily, therefore, the pillow type bag body 205 shown in Figure 22 (c) is most preferred.

The following laminated structure 220 that is used to form lithium battery of the present invention of describing with reference to Figure 23 (a) and 23 (b).Laminated structure 220 has the Thermoadhesive innermost layer 223 that can be thermally bonded to joint 203 can use butt joint 203 that fusible resin is also arranged.Laminated structure 220 need be provided with insulating course 222.Usually, outermost layer 221 is to have high-intensity film.When needs, with intermediate layer 224 laminations such as grade.Can use adhesive or adhesive resin that each layer of laminated structure 220 is bonded together.

Laminated structure 220 basic structures that are used to form lithium battery bag 205 are made up of outermost layer 221, the insulating course 222 that is laminated to outermost layer 221, the hot sealing layer (Thermoadhesive resin bed) 223 that is laminated to insulating course 222.Thereby reinforced layer 224 also can be sandwiched in the partition of protecting insulating course 222 between insulating course 222 and the hot sealing layer 223 and keeping bag 205; That is, laminated structure 220 can be to form as shown in Figure 23 (b): outermost layer 221/ insulating course 222/ reinforced layer 224/ hot sealing layer 223.As shown in Figure 23 (b), laminated structure 220 also can provide the additional reinforced layer 224a that is clipped between outermost layer 221 and the insulating course 222.

In Figure 23 (a) and 23 (b), adhesive phase 225 is sandwiched between adjacent layer 211,222,223,224 and the 224a.

The formation of the laminated structure 220 that is used to form lithium battery packing bag 205 of the present invention is described with reference to Figure 23 (a) and 23 (b) again.

With regard to outermost layer 221 materials, as the basic unit of printing, laminated body it have as film resist to come intensity, mar proof is good, and, use the material of insulating properties.Specifically, the film that is used to form outermost layer 221 is with made films such as mylar, polyamide, acrylic resin, polycarbonate resins.Preferably use film with orientation.

The thickness of outermost layer 221 is preferably in 10 to 25 mu m ranges in 5 to 30 mu m ranges.

As shown in Figure 23 (b), additional reinforced layer 224a also can be sandwiched between outermost layer 221 and the insulating course 222.Additional reinforced layer 224a strengthens the intensity of laminated structure 220 and is used to prevent insulating course 222 damaged with the film of above-mentioned outermost layer 221.Can use the alignment films or the non-alignment films of mylar, polyamide, acrylic resin, polycarbonate resin etc. as the material of additional reinforced layer 224a.Consider intensity, the Biaxially oriented film of these resins is wanted especially.

Insulating course 222 must be selected the material of barrier character completely for use so that stop aqueous vapor to infiltrate lithium battery package body 205.

If moisture infiltrates lithium battery package body 205, because aqueous vapor and lithium cell electrolyte reaction produce hydrogen fluoride, hydrogen fluoride infiltrates each layer of laminated structure, becomes the reason of laminated structure splitting.Laminated structure must have barrier character completely, and specifically, laminated structure must be a moisture vapor transmission not fully.By to material that forms insulating course 222 and the experimental result that insulating course 222 thickness effects are done, it is likely that the metal forming that forms insulating course 222 has the above thickness person of 20 μ m.The metal forming that thickness is lower than 20 μ m just has pin hole originally, because package body is bent, probably will form new pin hole and crack in metal forming.Alloy Foil as metal formings such as above-mentioned insulating course available copper, tin, lead, iron, aluminium and these metals.Because aluminium foil is relatively cheap, be easy to processing, proportion is little, so preferably use aluminium foil.Metal foil thickness as insulating course 222 must be preferably in 15 to 40 mu m ranges more than 10 μ m.

The reinforced layer 224 that is clipped between insulating course 222 and the heat sealable layer 223 has the effect that prevents to damage as the metal forming of insulating course 222, and the infringement of so-called metal forming is owing to form pin hole in the insulating course 222 due to the laminated structure bending; Or because the caused damage of acute angle of container (lithium battery body).Reinforced layer 224 can be with additional reinforced layer 224a the same composition material to be arranged, and can use orientation or non-alignment films as being made up of following any resin: acrylic resin, mylar, polyamide and polycarbonate resin.When considering intensity, wish that especially Biaxially oriented film is as reinforced layer 224.

The hot sealing layer (thermal adhesive resin layer) 223 that is used to form the laminated structure 220 of lithium battery packing bag 205 of the present invention can use resin that has heat sealability between hot sealing layer itself and the resin (electrode nipple is formed as Copper Foil or aluminium foil by conductive material) that electrode nipple 203 is also had heat sealability.

The resin that forms heat sealable layer 223 must be not reason lithium battery electrolytes and the material of deterioration.

As the resin that is used to form hot sealing layer 223 be: for example, except that vinyl-vinyl acetate copolymer, vinyl-acrylate copolymer, ethylene-methyl acrylate copolymer, also can use the vistanex of in polyethylene or polypropylene, sneaking into one or two or more kinds gained of above-mentioned copolymer.Particularly preferably use unsaturated carboxylic acid or its acid anhydride (acrylic acid, methacrylic acid, maleic acid, maleic anhydride, citraconic anhydride, itaconic acid and acid anhydride thereof etc.) to acid modified polyolefin (for example that ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer is the such sour composition copolymerization and the vistanex of modification; Or the vistanex of copolymer, ethylene-ethyl acetate copolymer, ethylene-methacrylic acid copolymer or their terpolymer etc. of polyethylene, polypropylene and they and alpha-olefin) carries out graft copolymer and the vistanex of modification.In these resins, the resin with fusing point more than 100 ℃ is used to form high heat-resisting battery packages.

Use the dried laminated process of the isocyanic acid adhesive of two-package curing type; The dried laminated process of the interlayer that resin of binding property is extrusion bonded; Or, the composition layer that forms lithium battery packaging laminate tectosome is glued together by imposing the heat laminating technology of hot pressurizing attaching with heat bonding film imbed and to layer.

In these laminated process, can select to use and have electrolyte resistance and the big method of productivity ratio.

A pair of 205a that is ready to be made up of above-mentioned laminated body 220 and 205b overlap the laminated body 220 of each sheet 205a, 205b, make relatively with therebetween thermal adhesive resin layer, make by formation heat seal portion 207,208.

Embodiment

Below use description to the packaged configuration and the packing method of lithium battery of the present invention.Lithium battery main body 202 is made of body portion 204 and electrode terminal 203, and body portion 204 is to be of a size of 110mm * 70mm * 1.5mm.Electrode terminal 203 is connected with the end of matrix part 204 and the length of electrode terminal is 25mm.

The laminated structure 220 that is used to form lithium battery 201 packing bags 205 has the following structure of representing with contracted notation.

PET16/DL/AL20/DL/PET16/AD50 (1)

[breviary symbol PET: polyester film, DL: dried lamination, AL: aluminium foil, AD: acid-modified polyolefin resin, the numeral behind the breviary symbol are bed thickness μ m]

Above-mentioned AD, that is, the hot sealing layer of acid-modified polyolefin resin is by the extruding laminated process acid-modified polyolefin resin directly to be formed sour modification unsaturated polyolefin film.

In addition, carry scroll laminated structure 220 in the present embodiment in the pillow packaging machine tool, also form pillow type packing bag in this machinery, bag is sent lithium battery main body 202 into continuously in the limit, and the limit is with the front and back end seal of each bag.Simultaneously, the two ends of unsealing part 209 that will be present in the part of electrode terminal 203 dash removes, and falls up to breaking, and packs automatically with the pillowcase packing machine.In addition, fold and use binder film that folding part 201 and its coincidence face is bonding unsealing part 209.

No matter electrode nipple 203 is to any direction bending, the electrode nipple 203 of gained lithium battery 201 can not be short-circuited with the conductive layer 222 in the laminated structure 220 that constitutes shell 205.Lithium battery 20 1 is very normal on self basic function.

In the present embodiment, above-mentioned folding part 210 overlaps the bonding two sides band that is to use of face with it, but uses hotmelt and adhesive applicator to be easy to realize automation.

Lithium battery packaged configuration of the present invention needn't worry that joint and metal insulating course section come in contact and short circuit, and this metal insulating course is by lamination in forming the laminated body of pocket.

Battery packages production method of the present invention can be used for online assembly mode quite effectively and make package body and lithium battery is packaged in packing.

The tenth embodiment

With reference to Figure 24 to 27 tenth embodiment of the invention is described.Figure 24 is the representative section view of battery packaging material laminated body of the present invention, and Figure 25 is the perspective view of lithium battery one embodiment of the present invention, and Figure 26 is the representative section view that the line X-X along Figure 25 is done, and Figure 27 is the representative section view that the line Y-Y along Figure 25 is done.The label of Figure 24 to 27 is: laminated structure 301, aluminium foil 303, easy adhesion process face 304, adhesive phase 305, internal layer 306, lithium battery 310, bag 311, lithium battery main body 312, joint 313, sealing back seam 314 and heat bonding portion 315.

With reference to Figure 24, internal layer 306 is laminated on the easy adhesive layer 304 that forms on the aluminium foil surface (these 304 layers) by adhesive phase 305, thereby forms laminated structure 301.

As shown in Figure 25 to 27, form lithium battery 310 in the pillow type bag body 311 by lithium battery main body 312 is sealed in, this bag has sealing back seam 314, and part joint 313 stretches out from bag 311, simultaneously, the other parts of same joint are sealed in the heat bonding end 315.Laminated structure 301 of the present invention is the primary structures that are used to form lithium battery packing bag 311.

Below, specifically describe laminated structure 301 of the present invention.

At first, for preventing aqueous vapor and gas, the aluminium foil 303 that makes laminated structure 301 infiltrates lithium battery 310, anti-pin hole angle in unborn pin hole and processing and the processing from aluminium foil, the thickness of aluminium foil 303 is more than the 15 μ m, preferably aluminium foil is more than the 20 μ m.From machinability (lamination processing, concavo-convex mold pressing and bag processing) and the angle of being convenient to handle bag set out, thickness is that the soft aluminium foil below the 100 μ m is suitable, below the best 80 μ m.

Secondly just at least one face of aluminium foil 303 the set treated side 304 that is easy to adhesion process be illustrated.This easy treated side 304 forms for following purpose: by using adhesive phase 305 aluminium foil 303 and internal layer 306 good bond are arrived together, protect at least one surface of aluminium foil 303 internal layers 306 not damaged by the illeffects of lithium cell electrolyte or hydrofluoric acid (being produced by the electrolyte hydrolysis) simultaneously.As specifically being set, the method that forms this easy treated side 304 for example has: will be that ungrease treatment is at first carried out by known degreasing process (as alkali soaking technology, electrolytic purification process, acid cleaning process, cathodic pickling technology or acid activation technology etc.) in aluminium foil 303 internal layer sides at least, subsequently, on ungrease treatment face, apply a kind of treatment fluid (aqueous solution), contain metal phosphate as main component (as chromium phosphate, titanium phosphate, phosphoric acid zirconia or trbasic zinc phosphate, or the mixture of these slaines) in this treatment fluid; Perhaps be coated with a kind of treatment fluid (aqueous solution), this treatment fluid comprises as the nonmetal phosphate of main component or these nonmetal phosphatic mixtures; Or the treatment fluid (aqueous solution) that some and water-soluble synthetic resin in these salt are mixed with, wherein, water-soluble synthetic resin is acrylic resin, phenolic resins or urethane resin etc., and coating is by known coated technique such as roller coating technology, gravure typography or impregnation technology etc.For example, when using the chromium phosphate solution-treated, the film of this easy treated side is by chromium phosphate (CrPO ₄), aluminum phosphate (AlPO ₄), aluminium oxide (Al ₂O ₃), aluminium hydroxide (Al (OH) _x) or aluminum fluoride (AlF _x) film formed.When using zinc phosphate solution, this easy adhesive layer is by trbasic zinc phosphate hydrate (Zn ₂PO ₄4H ₂O), aluminum phosphate (AlPO ₄), aluminium oxide (Al ₂O ₃), aluminium hydroxide (Al (OH) _x) or aluminum fluoride (AlF _x) film formed.When handling with the trbasic zinc phosphate treatment fluid, the film of this treated side is by trbasic zinc phosphate hydrate (Zn ₂PO ₄4H ₂O), aluminum phosphate (AlPO ₄), aluminium oxide (Al ₂O ₃), aluminium hydroxide (Al (OH) _x), aluminum fluoride (AlF _x) wait composition.The thickness of the easy adhesive layer 304 that solidifies arrives in the 200nm scope 1, arrives in the 50nm scope 10 usually.When use contained the treatment fluid (aqueous solution) of the mixture of water-soluble synthetic resin, these easy adhesive layer 304 thickness arrived in the 500nm scope 100.

Available other method forms easy adhesive layer 304, for example, this method is by at least one the surperficial degreasing to aluminium foil 303 of alkali soaking technology, electrolytic purification process, acid cleaning process, cathodic pickling technology or acid activation technology, subsequently, make the surface after this aluminium foil 303 purifies stand known anode oxidation process processing.The protective layer 340 that forms by this method is pellumina (Al ₂O ₃Film).Usually, the thickness of pellumina is at several microns Al that arrive in the hundreds of micrometer range ₂O ₃According to the present invention, as the suitable thickness of the pellumina of easy adhesive layer 304 at several microns in 20 mu m ranges.

As shown in Figure 27, the internal layer 306 of laminated structure can be to form heat bonding portion 315 thermal adhesive layer of (this contains the part of joint 313); Perhaps also can be the reinforced layer that is used to strengthen the Thermoadhesive resin bed, this reinforced layer be used for the Thermoadhesive resin bed that a pair of internal layer 306 is bonded together is strengthened.Any method that don't work, the fusing point of internal layer 306 should be more than 80 ℃, and this is guaranteeing that the environmental suitability of lithium battery (thermal endurance and cold resistance) is necessary.From the angle of these requirements, be the derivative and the mixture of vistanex, acrylic resin, mylar, fluorocarbon resin or these resins as the material that forms internal layer 306.

Vistanex comprises ldpe resin, the medium density polyethylene resin, high-density polyethylene resin, linear low density polyethylene resin, use the ethene-alpha-olefin copolymer of single-point catalyst institute polymerization, ionomer, acrylic resin, ethylene-propylene copolymer, vinyl-vinyl acetate copolymer, the saponification vinyl-vinyl acetate copolymer, polybutene resin, Vicat softening point is that the unsaturated carboxylic acid graft vistanex more than 70 ℃ (comprises the unsaturated carboxylic acid graft polyvinyl resin, resins such as unsaturated carboxylic acid graft acrylic resin and unsaturated carboxylic acid graft polymethylpentene) and the modifier of these resins.

Acrylic resin comprises ethylene-methyl methacrylate derivative copolymer, ethylene-propylene acid derivative copolymer.More specifically, acrylic resin is ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer and ethylene-methyl methacrylate methyl terpolymer.

Mylar comprises the copolymer and the modifier of PETG, polybutylene terephthalate (PBT), PEN, PBN, Merlon and these resins.

Fluorocarbon resin comprises tetrafluoroethene, trifluoro-ethylene, Kynoar, polyvinyl fluoride, ETFE, polymonochlorotrifluoroethylene, ethene-one chlorotrifluoroethylcopolymer copolymer and tetrafluoraoethylene-hexafluoropropylene copolymer etc.

Above-mentioned resin can use the orientation or the non-oriented film of these resins.When needs, the surface of film can be handled and/or the atmospheric plasma PROCESS FOR TREATMENT through corona discharge process.When internal layer 306 is used as thermal adhesive resin layer individual layer, the heat bonding portion 315 of Figure 25 and joint shown in Figure 27 313 must be sealed to and has no the slit.Internal layer 306 thickness are at least 10 μ m, are more preferably more than the 50 μ m.Though when considering the sealability of internal layer 306, as the upper limit, internal layer 306 can be that about 100 μ m are thick, from the angle of minimizing expense and formation small size lithium battery, the suitable thickness of internal layer 306 is below the 100 μ m.When internal layer 306 was used as the reinforced layer of strengthening the thermal adhesive resin layer, the suitable thickness of internal layer 306 was in 10 to 50 mu m ranges.Again from the minimizing expense with form the angle of small size lithium battery, the summation of the thickness of reinforced layer and Thermoadhesive resin bed is serving as suitable below the 100 μ m.

Below adhesive phase 305 will be described.As the resin that forms adhesive phase 305 is the known binders that is used for dried lamination, comprising the modifier or the mixture of mylar, polyether resin, polyurethane resin, EU, PAUR, isocyanate resin, vistanex, polyethylene-imide resin, cyanoacrylate resin, organic titanic compound, epoxy resin, imide resin, silicone resin and these resins.Formation method as this adhesive phase 305 is to go up the solution film forming shape that the coating aforementioned resin is formed with known coating method at easy adhesion process face 304 (this face is formed on the aluminium foil 305), and make film become dry form adhesive layer 305, in the known coating method just like method of roll coating or gravure coating method.Internal layer 306 is adhered on the applicator surface on 304 of the treated sides, so that finish by aluminium foil 303 and internal layer 306 laminated structures subsequently.

Can suitably silane coupler be blended in the resin that is used to form adhesive layer 305.As silane coupler be: for example, the epoxies organic silane compound comprises for example 3-glycidoxypropyltrime,hoxysilane; The amine organic silane compound is comprising [3-(2-amino-ethyl) aminopropyl] trimethoxy silane etc.; Or isocyanide class organic silane compound is comprising 3-isocyanates propyl-triethoxysilicane etc.Because so the epoxies organic silane compound has higher affinity further to improve adhesiveness with isocyanide class organic silane compound than with metal, so the epoxies organic silane compound is preferred.The amine organic silane compound itself has the function of curing agent and has short adhesive pot life.Silane coupler solids content in the resin of formation adhesive phase 305 is more than 1%, less than 50%, and is best more than 10%, less than 30%.

Because laminated structure 301 of the present invention is provided with the Thermoadhesive resin bed on internal layer 304, so can be used to form the lithium battery package body.Yet, to compare with metal can, the external force resistance of the packing that is formed by laminated structure 301 particularly anti-ly pierces through intensity and does not reach enough height.Have the anti-laminated structure that pierces through intensity of enough height for being provided at aluminium foil 303 outsides, the skin of being made up of double axial orientated polyester film or polyamide membrane is adhered on the outer surface of aluminium foil 303.As polyester film is PETG film, polybutylene terephthalate (PBT) film, poly (ethylene naphthalate) film, PBN film and polycarbonate membrane etc.As polyamide membrane is nylon 6, the film of nylon 66 grades.Skin is at least a biaxially-oriented polyester or Biaxially orientated polyamide film, and thickness is more than the 6 μ m, is preferably in 12 to 25 mu m ranges.As method with outer and aluminium foil 303 laminations, can use the known dried laminated process of aforementioned adhesion agent layer 305 resin, outer and aluminium foil 303 can be by lamination.Certainly, the adhesive surface of biaxially-oriented polyester or polyamide membrane corona discharge processes.

Embodiment

The present invention of the tenth embodiment is described in further detail by the following examples.For degreasing, the soft aluminium foil (untreated foil) that 20 μ m are thick soaks 4 minutes after washings in 50 ℃ 10% weight ratio sodium hydride solution, with after the deionized water washing, stands heated-air drying more again, so that the soft aluminium foil of preparation degreasing.In dilute sulphuric acid is bathed, the soft aluminium foil of this degreasing is carried out anode oxidation process handle again, so that at the pellumina (Al of the surface of the soft aluminium foil of this degreasing formation as protective layer ₂O ₃Film), thus to form the soft aluminium foil of pellumina.

Embodiment 1

To be that the aqueous solution of principal component is coated on the surface of the soft aluminium foil of degreasing with 10 weight % chromium phosphates, thereby and this film dried and formed easy adhesion process face.In the mixed solution of the how pure and mild bisphenol A type epoxy resin of mixed polyester, mix being applied on the easy adhesion process face again, thereby form per unit area dry weight 4g/m with the prepared mixed liquor of trichloroethylene vulcabond (TDI) ²Adhesive phase.Simultaneously, thus with this adhesive layer with carry out the thick biaxial orientation polyethylene glycol terephthalate's film of surface-treated 25 μ m through corona discharge process and be adhered on the aluminium foil and form the laminated structure 301 that battery among the embodiment 1 is adorned usefulness outward.

Embodiment 2

The formation of the laminated structure 301 among the embodiment 2 is with the same program that forms laminated structure 301 among the embodiment 1, and only being to use with 5% weight percent phosphoric acid chromium is the solution that the aqueous solution of principal component and the mixed liquor that contains the formulations prepared from solutions of 10 weight % hydroxyethyl methacrylates replace containing 10% weight percent phosphoric acid chromium.

Embodiment 3

The formation of the laminated structure 301 among the embodiment 3 is with the same program that forms laminated structure 301 among the embodiment 1, and just obtaining the per unit area dry weight to a surface applied of the soft aluminium foil that scribbles pellumina by the mixed liquor of the many alcohol of mixed polyester, bisphenol A type epoxy resin and TDI preparation is 4g/m ²Adhesive phase, use this adhesive phase to be adhered on the aluminium foil simultaneously through the thick biaxial orientation polyethylene glycol terephthalate's film of 25 μ m that corona discharge process is handled.

Embodiment 4

With mixing to contain 5 weight % chromium phosphates is the surface that the mixed liquor of the aqueous solution of principal component and the aqueous solution preparation that contains 10 weight % hydroxy-ethyl acrylates is coated to the degreasing aluminium foil, and it is dried, thereby form easy adhesion process surface layer on the surface of the soft aluminium foil of degreasing.By being coated with the mixed solution of forming by polyester polyol, acid anhydrides and epoxy resin and drying this film, be 6g/m thereby on easy adhesive layer, form the per unit area dry weight ²Adhesive phase A.Secondly, will be coated with by the mixed liquor that polyester polyol and TDI form and oven dry, be 6g/m thereby form the per unit area dry weight on the thick biaxial orientation polyethylene glycol terephthalate's film of the 25 μ m surface of handling through corona discharge process ²Adhesive layer B.Thereby adhesive layer A and B are incorporated into and form the laminated structure 301 that the present invention adorns usefulness outward together.

Embodiment 5

Scribbling on the soft aluminium foil surface of pellumina and will being coated with by the mixed liquor that polyester polyol, acid anhydrides and epoxy resin are formed and oven dry, be 6g/m thereby form the per unit area dry weight ²Adhesive layer A.Secondly, will be coated with by the mixed liquor that polyester polyol and TDI form and oven dry, be 6g/m thereby form the per unit area dry weight on the thick biaxial orientation polyethylene glycol terephthalate's film of the 25 μ m surface of handling through corona discharge process ²Adhesive layer B.Formation the present invention adorns outward with laminated structure 301 thereby adhesive layer A and B are incorporated into together.

Embodiment 6

The formation of the laminated structure among the embodiment 6 is with the same program that forms laminated structure 301 among the embodiment 1, just the mixed liquor by the many alcohol of mixed polyester, epoxy resin and TDI preparation is by with by the solids epoxy organic silane compound of polyester polyol, bisphenol A type epoxy resin, TDI and 15 weight % (specifically, being the 3-glycidoxypropyltrime,hoxysilane) mixed liquor of preparation replaces, the mixed liquor that substitutes is coated on the easy adhesive phase that forms on the soft aluminium foil of degreasing, thereby makes the laminated body 301 that the present invention adorns usefulness outward.

Comparative Examples 1

The mixed liquor of polyester polyol, bisphenol A type epoxy resin and TDI preparation is coated on the surface of the thick aluminium foil (untreated foil) of 20 μ m, is 4g/m thereby form the per unit area dry weight ²Adhesive phase.Simultaneously, this adhesive phase is with bonding through the thick biaxial orientation polyethylene glycol terephthalate's face of corona discharge process surface-treated 25 μ m, thus the laminated structure in the formation Comparative Examples 1.

Laminated structure is immersed in 60 ℃ the following electrolyte in laminated structure that embodiment 1 to 6 is made and the Comparative Examples 1, and estimates in chronological order with following evaluation assessment that the bonding strength between the aluminium foil and biaxial orientation polyethylene glycol terephthalate's film changes in each laminated structure.The result who estimates is listed among the table 10-1.

Electrolyte: the phosphorus hexafluoride lithium is dissolved in dissolving in the mixed solution (ethylene carbonate/diethyl carbonate/dimethyl carbonate=1/1/1), preparation 1M phosphorus hexafluoride lithium solution.

In table 10-1, dicyclo representative " being difficult to peel off ", monocycle representative " peelable ", triangle representative " easily peeling off " and fork representative " lamination is peeled off ".

Table 10-1

	Bonding strength
							Initial stage	After 1 day	After 3 days	After 5 days	After 7 days	After 10 days
	Embodiment
1		◎	◎	◎	○	○	○
	Embodiment 2							◎	◎	◎	◎	○	○
Embodiment 3		◎	◎	◎	◎	○	○
	Embodiment 4							◎	◎	◎	◎	◎	◎
Embodiment 5		◎	◎	◎	◎	◎	◎
	Embodiment 6							◎	◎	◎	○	○	○
Comparative example 1		○	×	×	×	×	×

* " initial stage " hurdle in the table is represented the outer dress of each battery be impregnated in electrolyte state before with laminated body.

Such as from table the 10-1 the understanding, the reducing in time of the bonding strength in all laminated structures of embodiment 1 to 6 between aluminium foil and the biaxial orientation polyethylene glycol terephthalate's film is unconspicuous, and has good anti-electrolyte characteristic.

From aforementioned description, can obviously find out, laminated structure of the present invention has good in steam and other gas barrier character, particularly also have good potential resistance to electrolyte contamination characteristic, and kept the initial adhesion strength between the aluminium foil and internal layer in the laminated structure of the present invention.

Claims (26)

1. a battery use packing material is characterized in that, this battery use packing material possesses successively the laminated body that aluminium foil and internal layer lamination are got up to form;

Wherein, the surface of the above-mentioned at least la m of above-mentioned aluminium foil is by constituting through the treated side of easy adhesion process, and this treated side and above-mentioned internal layer be by the adhesive phase lamination, and

Above-mentioned treated side is by with after the above-mentioned aluminium foil surface ungrease treatment, and the treatment fluid that constitutes with the mixture of phosphate metal salt or phosphoric acid non-metal salt and aqueous synthetic-resin is handled and formed.

2. battery use packing material according to claim 1 is characterized in that adhesive phase is between the interlayer of laminated body.

3. battery use packing material according to claim 1 is characterized in that outermost layer is made of a plurality of base materials.

4. battery use packing material according to claim 1 is characterized in that, forms protective layer on the aluminium foil surface of formation barrier layer.

5. battery use packing material according to claim 4 is characterized in that, protective layer comprises any in the modifier of epoxy resin, phenol resin, melamine resin, unsaturated carboxylic acid graft vistanex, acrylic resin and these resins at least.

6. battery use packing material according to claim 1, it is characterized in that, the middle base material that forms the intermediate layer is at least by comprising mylar, vistanex, and perhaps at least a resin in the resin of the modifier of these resins and mixture formation constitutes.

7. battery use packing material according to claim 1 is characterized in that, the thickness in intermediate layer is more than the 5 μ m.

8. battery use packing material according to claim 1, it is characterized in that, the heat sealability base material that constitutes innermost layer is any formation in the following resin, these resins are the copolymer resin of acid-modified polyolefin resin, unsaturated carboxylic acid graft vistanex, acrylic resin, metal ion crosslinked polyvinyl resin, ethene and acrylic acid derivative and the copolymer resin of ethene and methacrylic acid derivative.

9. battery use packing material according to claim 1 is characterized in that innermost layer is made of a plurality of base materials.

10. battery use packing material according to claim 2, it is characterized in that, adhesive phase is to be made of any in the following resin, and these resins are polyester-ammonia ester resin, polyethers-ammonia ester resin, isocyanate resin and unsaturated carboxylic acid graft vistanex.

11. battery use packing material according to claim 1 is characterized in that, barrier layer is the soft aluminium foil of iron content in 0.3 to 9.0% scope.

12. battery use packing material according to claim 11; it is characterized in that; barrier layer forms protective layer on innermost layer one side surface; this protective layer is made of resin bed; this resin bed contains at least a in the following resin more than at least 30%, and these resins are epoxy resin; phenol resin; melamine resin; polyimide resin; unsaturated polyester resin; polyurethane resin; alkyd resins; the unsaturated carboxylic acid graft vistanex; the conjugated polyester resin of PETG and polybutylene terephthalate (PBT) etc.; ionomer; vinyl-vinyl acetate copolymer; ethylene-propylene acid derivative copolymer; ethylene-methyl methacrylate derivative copolymer; the modifier of polyether resin or these resins.

13. battery use packing material according to claim 11 is characterized in that, outermost layer comprises the oriented polyester or the oriented nylon of the above thickness of one deck 6 μ m at least.

14. battery use packing material according to claim 11 is characterized in that, the intermediate layer comprises mylar, vistanex or the fluororesin of the above thickness of one deck 10 μ m at least.

15. battery use packing material according to claim 11; it is characterized in that; form resin between barrier layer or protective layer and intermediate layer, this resin is mylar, polyether resin, polyurethane resin, polyethers-ammonia ester resin, polyester-ammonia ester resin, isocyanate resin, vistanex, polyethylene-imide resin, cyano-acrylate resin, organic titanic compound, epoxy resin, imide resin, silicone resin, the modifier of these resins or the mixture of these resins.

16. battery use packing material according to claim 11; it is characterized in that; being provided with between protective layer and the intermediate layer by thickness is more than the 0.5 μ m and fusing point is more than 80 ℃ and Vicat softening point is to comprise the unsaturated carboxylic acid graft polyvinyl resin more than 70 ℃; or unsaturated carboxylic acid graft acrylic resin; the perhaps layer that constitutes of the mixture of the unsaturated carboxylic acid graft vistanex of unsaturated carboxylic acid graft polymethylpentene and these resins.

17. battery use packing material according to claim 11 is characterized in that, the mylar that uses in outermost layer and/or the intermediate layer is pet copolymer or polybutylene terephthalate (PBT) copolymer.

18. battery use packing material according to claim 11, it is characterized in that innermost layer is more than the 10 μ m by thickness and fusing point is more than 80 ℃ and Vicat softening point is that any the unsaturated carboxylic acid graft vistanex in unsaturated carboxylic acid graft polyvinyl resin, unsaturated carboxylic acid graft acrylic resin, the unsaturated carboxylic acid graft polymethylpentene resin that comprises more than 70 ℃ constitutes.

19. battery use packing material according to claim 11 is characterized in that, innermost layer is to be made of any in polyvinyl resin, acrylic resin, vinyl-vinyl acetate copolymer and the ionomer.

20. battery use packing material according to claim 11, it is characterized in that, innermost layer is the copolymer of ethylene-propylene acid derivative, the copolymer of ethylene-methyl methacrylate derivative, the copolymer of propylene-acrylic acid derivative, or the copolymer of propylene-methacrylic acid derivative.

21. battery use packing material according to claim 1; it is characterized in that; form the thick protective layer that constitutes by resin of 0.5 to 30 μ m on the surface of innermost layer one side of barrier layer; this resin comprises at least a in the following resin more than 30%, and these resins are epoxy resin; phenol resin; melamine resin; polyimide resin; unsaturated polyester resin; polyurethane resin; alkyd resins; the unsaturated carboxylic acid graft vistanex; the copolyesters of PETG and polybutylene terephthalate (PBT) etc.; ionomer; vinyl-vinyl acetate copolymer; the copolymer of ethene and acrylic acid derivative; the copolymer of ethene and methacrylic acid derivative; the modifier of polyether resin or these resins.

22. battery use packing material according to claim 21; it is characterized in that, between each layer of protective layer and intermediate layer, intermediate layer and innermost layer by any resin-shaped resin layer in mylar, polyether resin, polyurethane resin, polyethers-ammonia ester resin, polyester-ammonia ester resin, isocyanate resin, vistanex, polyethylene-imide resin, cyano-acrylate resin, organic titanic compound, epoxy resin, imide resin, silicone resin and modifier or the mixture.

23. battery use packing material according to claim 1 is characterized in that, innermost layer is to be made of the two-layer at least above coextrusion resin bed that forms by the coetrusion that contains resin bed that can heat bonding to metal.

24. battery use packing material according to claim 1, it is characterized in that, innermost layer is by by containing not heat bonding of metal, but two-layer at least above coextrusion resin bed that the coetrusion of the resin bed that innermost layer each other can heat bonding forms constitutes.

25. battery use packing material according to claim 23, it is characterized in that to have the resin of Thermoadhesive to contain at least a in the modifier of the copolymer of copolymer, propylene and methacrylic acid derivative of copolymer, propylene and acrylic acid derivative of copolymer, ethene and methacrylic acid derivative of acid-modified polyolefin resin, sour modified polyvinyl resin, ethylene-acrylic acid copolymer, metal ion crosslinked polyvinyl resin, ethene and acrylic acid derivative and these resins for above-mentioned metal.

26. battery use packing material according to claim 1 is characterized in that, above-mentioned aqueous synthetic-resin is acrylic resin, phenol resin or ammonia ester resin.

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