CN1196210C - Soft-casting lithium iron battery and its making process - Google Patents
Soft-casting lithium iron battery and its making process Download PDFInfo
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- CN1196210C CN1196210C CNB021343713A CN02134371A CN1196210C CN 1196210 C CN1196210 C CN 1196210C CN B021343713 A CNB021343713 A CN B021343713A CN 02134371 A CN02134371 A CN 02134371A CN 1196210 C CN1196210 C CN 1196210C
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- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 230000008569 process Effects 0.000 title claims abstract description 14
- 238000005266 casting Methods 0.000 title claims description 12
- 239000000463 material Substances 0.000 claims abstract description 44
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- 239000004743 Polypropylene Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 229920001155 polypropylene Polymers 0.000 claims abstract description 13
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims description 22
- 229910001416 lithium ion Inorganic materials 0.000 claims description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 19
- 239000011159 matrix material Substances 0.000 claims description 18
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- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
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- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
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- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
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- 229920002635 polyurethane Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229910000552 LiCF3SO3 Inorganic materials 0.000 description 1
- 229910012820 LiCoO Inorganic materials 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910010584 LiFeO2 Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910014549 LiMn204 Inorganic materials 0.000 description 1
- 229910002993 LiMnO2 Inorganic materials 0.000 description 1
- 229910003005 LiNiO2 Inorganic materials 0.000 description 1
- 229910013179 LiNixCo1-xO2 Inorganic materials 0.000 description 1
- 229910013171 LiNixCo1−xO2 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 206010027783 Moaning Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910003092 TiS2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
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- 239000002253 acid Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 229920001577 copolymer Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 229960001760 dimethyl sulfoxide Drugs 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
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- XQHAGELNRSUUGU-UHFFFAOYSA-M lithium chlorate Chemical compound [Li+].[O-]Cl(=O)=O XQHAGELNRSUUGU-UHFFFAOYSA-M 0.000 description 1
- 229910021450 lithium metal oxide Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000011331 needle coke Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
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- 239000005011 phenolic resin Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
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- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a soft-casing lithium iron battery and a making method thereof, which belongs to battery fields. The soft-casing lithium iron battery comprises a positive electrode piece, a negative electrode piece, an isolating film, electrode ears and the exterior package casing of the battery, wherein the exterior package casing of the battery is more than three layers of composite films, wherein the innermost layer is prepared with polyethylene and polypropylene materials with favorable heat sealability, the middle layer contains a layer of aluminum foil with favorable isolating performance, and the outermost layer is multilayer films. A macromolecular hot-melt adhesive resin material is applied to each pole ear and the sealing part of the exterior package casing of the battery. The method can effectively prevent the problems of liquid leakage, gas expansion, short circuit and the like of the battery in a charging process and a storing process. Thereby, the soft-casing lithium iron battery and the making method thereof have the advantages of simple preparation technology and low production cost.
Description
Technical field
Soft-casting lithium iron battery of the present invention and manufacture method belong to field of batteries, particularly relate to a kind of nonaqueous electrolyte secondary lithium battery and manufacture method thereof.
Background technology
In recent years, along with palmtronic, for example small and exquisite, lightweight mobile phone or laptop computer popular, the research and development secondary cell that has that volume is little, output is stable and can use for a long time by charging repeatedly in a large number, angle from energy density, adopting lithium metal is best as the negative pole of nonaqueous electrolyte battery, but because lithium anode formation owing to Li dendrite in the charge and discharge cycles process makes the internal short-circuit of secondary cell, and can cause serious safety problem.Usually lithium ion battery is the LiCoO that the negative material of can reversible embedding being moved out by lithium ions such as graphite and lithium ion can reversible embedding be moved out
2Form Deng positive electrode, and had very big market.But the lithium ion battery under the prior art, its shell almost all uses the container of being made by metal materials such as stainless steel, aluminium, use the battery of these sheathing material types, have to make the weight of battery very big, so that make nonaqueous electrolyte battery that the weight energy density of lithium ion battery is descended, and this class battery exists problems such as leakage and inside battery corrosion, uses in the high place of ask for something to be restricted.Adopt the polymer battery of similar shell with the present invention, for example Chinese invention patent CN 1317512A has disclosed the manufacture method of polymer battery and battery, it has adopted with acrylic acid fat series derivates is monomer and crosslinking agent, under thermal initiator causes, make liquid electrolyte solution and acrylic polymer form the polymer electrolyte of gel state by thermochemical method, but in the polymer battery of said method manufacturing, liquid state organic electrolyte is bound within certain scope, make the state that electrolyte is solid-state or class is solid-state, there is easy-to-leak liquid in battery under the prior art though alleviated, problems such as corrosion, but at room temperature ionic conductivity is very low especially at low temperatures owing to polymer dielectric, make this battery mis-behave at low temperatures, especially this class battery, exist the manufacture method complexity, preparation technology requires height, makes the high deficiency of production cost of battery.
The objective of the invention is to improve the energy density of lithium ion battery, eliminate problems such as the easy leakage of lithium ion battery, corroding metal shell, reduce the production cost of lithium ion battery or polymer Li-ion battery, provide that a kind of preparation technology is simple, the good soft-casting lithium iron battery and the manufacture method of low temperature performance of battery.
Summary of the invention
Lithium ion battery of the present invention is to be main anode pole piece and cathode pole piece by the electric material that lithium ion can reversible embedding be moved out, the barrier film that separates anode pole piece and cathode pole piece, form introducing the lug be used to provide output current and the external packing housing of battery on the anodal electric current matrix and on the cathodal current matrix respectively, the external packing housing of battery is the laminated film more than three layers, innermost layer is polyethylene and the polypropylene material with good heat sealability, the aluminium foil that one deck has excellent barrier properties is contained in the centre, outermost layer is the above multi-layer thin rete with defencive function of one deck, employing has the material of defencive function, can add suitable thin layer according to different functions, the material of the defencive function of adoptable multi-layer thin rete has: PET/Al/PE; PET/Al/PP; BOPP/Al/PE; PA/Al/CPP etc., wherein PET is a pet film, and PE is a polyethylene film, and PP is a polypropylene film, and BOPP is a bidirectional stretching polypropylene film, and CPP is a cast polypropylene film, and PA is a polyamide film.Laminated film can use the dry type complex technique, extrusion coated complex technique, coextrusion complex technique etc., technological process during technology needs to determine according to the chemical property of film, for example extruding compound typical last process flow can be as follows: aluminium foil unreels, and applicator roll carries out the roller coat gluing, and is compound with film, heating drying tunnel drying, the finished product rolling.External packing housing seal place at lug and battery applies hot-fusible high-molecular gum resin material, guarantee the adhesive property of the external packing housing of lug and battery, used macromolecule resin comprises: the polyamide type, polyurethane-type, PURs such as improved polyalkene, also can select epoxyn for use, synvaren, acrylate adhesive etc., preferentially select improved polyalkene type PUR for use, by sticking one deck thermosol at lug and corresponding external packing housing seal place, under the heating and pressurizing mode, make both reach compound then, the temperature of heating is relevant with the character of thermosol, and for example the heat-seal temperature of modified poly alkene is between 100 ℃ to 200 ℃.
The positive electrical material that lithium ion of the present invention can reversible embedding be moved out has: lithium hybrid transition metal oxide, transition metal are preferentially chosen from cobalt, manganese, nickel; Metal sulfide; And compound with Olive phase structure.In the lithium hybrid transition metal oxide, the compound that some of LiCoO2, LiNiO2, LiNixCo1-xO2, LiMn204 and they are mixed other ion is particularly suitable in the application of the present invention, the ion that mixes can not chosen from other does not belong to element the above-claimed cpd, and other lithium metal oxide has LiMnO2, LiFeO2, V2O5, MoO2, TiO2.Metal sulfide can be selected materials such as ZnS, TiS2, MoS2.The compound that belongs to Olive type phase structure has and mixes the derivative that other ion forms in LiFePO4 and this kind compound, and the ion that mixes can not chosen from other does not belong to element this kind compound.
Be used for constituting in the main electric material of cathode pole piece, preferential selection can be carried out the material that the reversible embedding of lithium ion is moved out.In these materials, for example can preferentially use non-graphitized material with carbon element or graphite material.Wherein non-graphitized material has RESEARCH OF PYROCARBON, and promptly various presomas are the carbide that obtains by pyrolysis such as phenolic resins, furane resins for example: coke can comprise pitch coke, needle coke, petroleum coke.Graphite material has materials such as various native graphites, various electrographite and graphitized carbon fibre.Negative electricity material used in the present invention is not limited to above-described material, and the metal oxide of for example various amorphous tin-based oxides, lithium-aluminium alloy, various nitride, various electronegative potentials, metal sulfide can be as cathode pole piece electric materials of the present invention.
Use the electric material in the above-described various both positive and negative polarity pole piece, add the material that some can play conductive capability between the reinforcement material, preferably carbon black, acetylene black, graphite, various lemels etc.; Add the material that various materials are bonded together simultaneously, the copolymer of optional polymerizing tetrafluoroethylene, vinylidene and vinylidene and hexafluoro-propylene etc. also can be selected water miscible macromolecule resin etc. for use.
For the uniformity that guarantees that each material mixes in the both positive and negative polarity, can use solvent to make each components dissolved of above-mentioned composition pole piece, be made into slurry with certain viscosity, solvent of the present invention can be selected water, ethanol, acetone, the N-methyl pyrrolidone, methyl-sulfoxide, dimethylbenzene etc., each components contents ratio can change in the following manner in the pole piece, be electric material 60-95%, has conductive capability material 40-5%, material 40-5% with cementitiousness, above-mentioned slurry with positive electric material is coated on the metal forming with the slurry with negative electricity material, the electric weight that electric material is emitted can be transmitted to power consumption equipment by metal forming, metal forming can adopt aluminium foil, Copper Foil, nickel foil etc., and by dry, roll, make the scope of the THICKNESS CONTROL of both positive and negative polarity pole piece at the 80-280 micron at last, porosity is controlled between the 25-50%.
The inside battery structure can be a winding method, be meant the centre that diffusion barrier is placed on positive electrode and negative electrode, and obtain around some center line movements continuously: can be the lamination mode, be meant by positive electrode, negative electrode, diffusion barrier being cut into the junior unit of identical size, and junior unit stacked up continuously obtain.The inside battery structure that is adopted among the present invention can use any in the aforesaid way.
Ionic compound in the organic electrolyte of the present invention, can use the general lithium salts that uses of conventional non-aqueous electrolyte battery, comprise: lithium chloride, lithium bromide, lithium iodide, lithium chlorate, lithium perchlorate, lithium nitrate, lithium hexafluoro phosphate, LiBF4, two (fluoroform sulphonyl) imines lithium, the hexafluoro sour lithium of moaning, LiCF3SO3, LiC materials such as (SO2CF3), available organic solvent has EC, DEC, DEE, DMC, EMC, PC, a kind of or two kinds and two or more mixtures in them in the DMSO isopolarity organic substance, in the organic electrolyte of forming by above-mentioned substance, the molar concentration of ionic compound can be preferably the scope between 0.5-2.0Mol/L between 0.1-3.0Mol/L.
At first make anode pole piece and cathode pole piece, on anodal electric current matrix and cathodal current matrix, introduce the lug that is used to provide output current respectively, in the centre of anode pole piece and cathode pole piece, insert and play the barrier film that separates anodal and negative pole, make the internal structure body of battery.
The external packing housing of battery is the laminated film more than three layers; innermost layer is polyethylene and the polypropylene material with good heat sealability; the aluminium foil that one deck has excellent barrier properties is contained in the centre; outermost layer is the above multi-layer thin rete with defencive function of one deck; use heat-sealable mode; formation can be wrapped and be received the space of inside battery structure; after the lug position bonding polyolefin thermosol that plays transport current; carry out heat-sealable; carry out the vacuum dehumidifying afterwards; and injection organic electrolyte material; and then it is above-mentioned with the battery vacuum sealing by fusing after the organic electrolyte activation to process; and after step such as changing into, forming final battery, it has three through the limits behind the hot melt involution.
After activating by the battery structure that multi-layer compound film surrounded with organic electrolyte, battery is carried out last pressurizing window, the machinery that seals can adopt various heat molten type sealing machines, electromagnetic induction sealing machine, ultrasonic sealing machine tool, vacuum heat molten type sealing machine, preferentially select vacuum heat molten type sealing machine for use, for solving packaged battery in the preceding process of charge and discharge cycles several times, because internal gas produces the possibility make that the internal resistance of battery strengthens, and may cause effective electric weight of battery to descend, the present invention uses the technology of sealing once more.
The present invention has prevented that effectively battery is at charge and discharge process and storing in the process, such as battery leakage, gas rise, problem such as short circuit, improved the energy density of lithium ion battery, the low temperature performance of battery is good, comprehensive electrochemical is good, be that a kind of preparation technology is simple, soft-casting lithium iron battery that production cost is low and manufacture method.
Description of drawings
Accompanying drawing 1 is the structural representation of soft-casting lithium iron battery of the present invention.
Accompanying drawing 2 is cut-away views of soft-casting lithium iron battery of the present invention.
Accompanying drawing 3 is external packing shell structure schematic diagrames of soft-casting lithium iron battery of the present invention.
Accompanying drawing 4 is lug sealing position enlarged drawings of soft-casting lithium iron battery of the present invention.
Accompanying drawing 5 is both positive and negative polarity composite diagrams of soft-casting lithium iron battery of the present invention.
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1; the external packing housing of lithium ion battery of the present utility model is the laminated film more than three layers; innermost layer is polyethylene and the polypropylene material with good heat sealability; the aluminium foil that one deck has excellent barrier properties is contained in the centre; outermost layer is the above multi-layer thin rete with defencive function of one deck; use heat-sealable mode; formation can be wrapped and be received the space of inside battery structure; after the lug position bonding polyolefin thermosol that plays transport current; carry out heat-sealable; carry out the vacuum dehumidifying afterwards; and injection organic electrolyte material; and then it is above-mentioned with the battery vacuum sealing by fusing after the organic electrolyte activation to process; and after step such as changing into, form final battery 1; it has three through the limit 2 behind the hot melt involution, is introducing the lug 3a that is used to provide output current, b on the anodal electric current matrix and on the cathodal current matrix.
As shown in Figure 2, the electric material that the utility model battery can reversible embedding be moved out by lithium ion is main anode pole piece 8 and cathode pole piece 10, the barrier film 9 that separates anode pole piece and cathode pole piece, the internal structure body is wound into inside battery structure 6, introducing the lug 3a that is used to provide output current, b on the anodal electric current matrix and on the cathodal current matrix.
As shown in Figure 3, the external packing housing of lithium ion battery of the present utility model is the laminated film more than three layers, innermost layer is polyethylene and the polypropylene material 20 with good heat sealability, the aluminium foil 21 that one deck has excellent barrier properties is contained in the centre, outermost layer is the above multi-layer thin rete 22 with defencive function of one deck, use the compound agent 23 that sticks with glue between film and the film, employing has the material of defencive function, can add suitable thin layer according to different functions, the material of the defencive function of adoptable multi-layer thin rete has: PET/Al/PE; PET/Al/PP; OPP/Al/PE; PA/Al/CPP etc., wherein PET is a pet film, and PE is a polyethylene film, and PP is a polypropylene film, and BOPP is a bidirectional stretching polypropylene film, and CPP is a cast polypropylene film, and PA is a polyamide film.
As shown in Figure 4, lug 3a of the present utility model, external packing housing 4 sealings place of b and battery apply hot-fusible high-molecular gum resin material 5, guarantee the adhesive property of the external packing housing of lug and battery, used macromolecule resin comprises: PURs such as polyamide type, polyurethane-type, improved polyalkene, also can select epoxyn, synvaren, acrylate adhesive etc. for use, preferentially select improved polyalkene type PUR for use.
As shown in Figure 5, battery of the present utility model is introduced the lug that is used to provide output current respectively on anodal electric current matrix 8 and cathodal current matrix 10, and in the centre of anode pole piece 7 and cathode pole piece 11, inserts and play the slider 9 that separates anodal and negative pole.
The present invention is further described below in conjunction with embodiment.
Embodiment
Embodiment 1
The electric conductor that the carbon black and the graphite of 90% cobalt acid lithium electric material and 5% mass ratio is constituted at first, the cohesive body that constitutes with the vinylidene fluoride (PVDF) of 5% mass ratio is dissolved in the organic solvent that the N-methyl pyrrolidone constitutes, and is modulated into active material slurry or active material and sticks with paste.Then slurry is coated in the two sides of electric current matrixes such as aluminium foil with conventional method, by drying, roll, has just made 160 microns anode pole piece.95% native graphite electric material and 5% vinylidene fluoride (PVDF) cohesive body are mixed in the organic solvent that the N-methyl pyrrolidone constitutes, be modulated into active material slurry and active material and stick with paste.Then slurry is coated in the two sides of electric current matrixes such as Copper Foil with conventional method, by drying, roll, has just made 160 microns cathode pole piece.(3a b), and in the centre of anode pole piece 7 and cathode pole piece 11, inserts and plays the slider 9 that separates anodal and negative pole, is wound into inside battery structure 6 to introduce the lug that is used to provide output current respectively on anodal electric current matrix 8 and cathodal current matrix 10.The external packing housing 4 of battery; adopting interior layer is the multi-layer compound film of PE or PP hot sealing layer; the external packing housing of battery is the laminated film more than three layers; innermost layer is polyethylene or the polypropylene material 20 with good heat sealability; the aluminium foil 21 that one deck has excellent barrier properties is contained in the centre; outermost layer is the above multi-layer thin rete 22 with defencive function of one deck; use the compound agent 23 that sticks with glue between film and the film; and use heat-sealable mode, formation to wrap to receive the space of inside battery structure.After the lug position bonding polyolefin thermosol that plays transport current, carry out heat-sealablely, carry out the vacuum dehumidifying afterwards, and inject organic electrolyte material (the LiPF6+EC+DEC solution of 1Mol/L).And then to through above-mentioned battery vacuum sealing by fusing after activating with organic electrolyte, and after step such as changing into, forming final battery 1, it has three through the limits 2 behind the hot melt involution.After battery measured, can find that the comprehensive electrochemical of battery is good, no leakage, gas does not rise, not short circuit, the reliability height of battery.
The electric conductor that the carbon black and the graphite of 88% LiMn2O4 electric material and 7% mass ratio is constituted at first, the cohesive body that constitutes with the vinylidene fluoride (PVDF) of 5% mass ratio is dissolved in the organic solvent that the N-methyl pyrrolidone constitutes, and is modulated into active material slurry or active material and sticks with paste.Then slurry is coated in the two sides of electric current matrixes such as aluminium foil with conventional method, by drying, roll, has just made 160 microns anode pole piece.95% graphitized carbon fibre electric material and 5% vinylidene fluoride (PVDF) cohesive body are mixed in the organic solvent that the N-methyl pyrrolidone constitutes, be modulated into active material slurry and active material and stick with paste.Then slurry is coated in the two sides of electric current matrixes such as Copper Foil with conventional method, by drying, roll, has just made 160 microns cathode pole piece.Introducing the lug (3a that is used to provide output current on the anodal electric current matrix 8 and on the cathodal current matrix 10 respectively, b), and in the centre of anode pole piece and cathode pole piece, insert and play the slider 9 that separates anodal and negative pole, be wound into inside battery structure 6 as shown in Figure 3.Form the external packing housing 4 of battery; adopting interior layer is the multi-layer compound film of PE or PP hot sealing layer; the external packing housing of battery is the laminated film more than three layers; innermost layer is polyethylene or the polypropylene material 20 with good heat sealability; the aluminium foil 21 that one deck has excellent barrier properties is contained in the centre; outermost layer is the above multi-layer thin rete 22 with defencive function of one deck; use the compound agent 23 that sticks with glue between film and the film; and use heat-sealable mode, formation to wrap to receive the space of inside battery structure.After the lug position bonding improved polyalkene type thermosol that plays transport current, carry out heat-sealable.Carry out the vacuum dehumidifying afterwards, and inject organic electrolyte material (LiPF6+EC+DMC of 1Mol/L).And then to through the battery vacuum sealing by fusing after activating with organic electrolyte, and after step such as changing into, forming final battery 1, it has three through the limits 2 behind the hot melt involution.
Adopt the lithium ion battery of technology made of the present invention to prevent battery effectively at charge and discharge process with store in the process, such as battery leakage, gas rise, problem such as short circuit.Consequently can obtain the good lithium ion battery of comprehensive electrochemical.
Claims (2)
1; a kind of soft-casting lithium iron battery; be to be main anode pole piece and cathode pole piece by the electric material that lithium ion can reversible embedding be moved out; the barrier film that separates anode pole piece and cathode pole piece; form introducing the lug be used to provide output current and the external packing housing of battery on the anodal electric current matrix and on the cathodal current matrix respectively; battery external packing housing is the laminated film more than three layers; innermost layer is polyethylene and the polypropylene material with good heat sealability; the aluminium foil that one deck has excellent barrier properties is contained in the centre; outermost layer is the above multi-layer thin rete with defencive function of one deck; it is characterized in that applying hot-fusible high-molecular gum resin material in external packing housing seal place of lug and battery; by sticking one deck thermosol at lug and corresponding external packing housing seal place; make both reach compound then under the heating and pressurizing mode, the PUR resin material is a polyurethane-type; or be the improved polyalkene PUR; or be synvaren; or be acrylate adhesive.
2; a kind of soft-casting lithium iron battery manufacture method; at first make anode pole piece and cathode pole piece; on anodal electric current matrix and cathodal current matrix, introduce the lug that is used to provide output current respectively; centre at anode pole piece and cathode pole piece; the barrier film that separates anodal and negative pole is played in insertion; make the internal structure body of battery; the external packing housing of battery is the laminated film more than three layers; innermost layer is polyethylene and the polypropylene material with good heat sealability; the aluminium foil that one deck has excellent barrier properties is contained in the centre; outermost layer is the above multi-layer thin rete with defencive function of one deck; use heat-sealable mode; formation can be wrapped and be received the space of inside battery structure; after the lug position bonding polyolefin thermosol that plays transport current; carry out heat-sealable; carry out the vacuum dehumidifying afterwards; and injection organic electrolyte material; and then it is above-mentioned with the battery vacuum sealing by fusing after the organic electrolyte activation to process; and after step such as changing into, form final battery; it has three through the limit behind the hot melt involution; it is characterized in that it is polyurethane-type that external packing housing seal place at lug and battery applies hot-fusible high-molecular gum resin material; or be the improved polyalkene PUR; or be synvaren; or be acrylate adhesive; by sticking one deck thermosol, under the heating and pressurizing mode, make both reach compound then at lug and corresponding external packing housing seal place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB021343713A CN1196210C (en) | 2002-07-17 | 2002-07-17 | Soft-casting lithium iron battery and its making process |
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| CNB021343713A CN1196210C (en) | 2002-07-17 | 2002-07-17 | Soft-casting lithium iron battery and its making process |
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| CN1196210C true CN1196210C (en) | 2005-04-06 |
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| CN1389938A (en) | 2003-01-08 |
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