CN1224249A - Thin sealed battery and producing method thereof - Google Patents
Thin sealed battery and producing method thereof Download PDFInfo
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- CN1224249A CN1224249A CN99101337A CN99101337A CN1224249A CN 1224249 A CN1224249 A CN 1224249A CN 99101337 A CN99101337 A CN 99101337A CN 99101337 A CN99101337 A CN 99101337A CN 1224249 A CN1224249 A CN 1224249A
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- exposed division
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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
Abstract
In a thin type sealed cell utilizing a cell case made of a laminated material, a storage life and reliability of the cell is increased by preventing a sectional surface at an end of the laminated material from being exposed in the cell case, and thereby a leakage of an electrolyte out of the cell and a short circuit in the cell are avoided. This is achieved by disposing a resin layer on the inner surface of the cell case composed of a sheet type laminated material, and covering the sectional surface existing inside the cell case with resin.
Description
The present invention relates to using the laminated material of aluminium lamination, adhesive layer and resin bed stacked, be the thin sealed battery that above-mentioned each layer has a battery case that the lamellar laminated material that exposes section makes in the end inside holds electrolyte and generating key element, in more detail, the structure of battery case of laminated material and the manufacture method of this battery case have been related to adopt.
In recent years, be accompanied by the miniaturization of electronic equipment, expecting the further miniaturization of battery, lightweight.Based on this situation, present inventors have proposed a kind of thin sealed battery (spy opens flat 10-214606 communique), and having adopted the two sides that makes at aluminium lamination is the laminated material made cell box of tubular by the laminated material that adhesive layer forms resin bed.As according to the scheme that is proposed, then because laminated material is thin and in light weight and can be easy to seal by heat fused, so can realize the thin sealed battery of small-sized, the light weight that productivity ratio is high.
But the above-mentioned existing thin sealed battery that adopts the laminated material made cell box though have above-mentioned advantage, is also having problems aspect the reliability of preservation characteristics and battery.In more detail, laminal laminated material, have the section exposed division that aluminium lamination, adhesive layer and resin bed are exposed, be present in the spatial accommodation that holds generating key element and electrolyte as this section exposed division, then electrolyte will be invaded the interface of each layer from the section exposed division.Therefore, binding agent and electrolyte react and the adhesion strength of binding agent are reduced, and aluminium lamination and resin bed are peeled off, thereby might be made solution leakage to outside batteries.
And when aluminium lamination and resin bed were peeled off as mentioned above, when solution leakage arrived outside batteries, moisture also can be invaded in the battery outside battery.Therefore, contain LiPF in for example employing
6In battery with nonaqueous electrolyte as the nonaqueous electrolytic solution of solute, LiPF
6Generate hydrofluoric acid with the water reaction, this hydrofluoric acid further reacts with aluminium.Consequently, aluminium lamination is corroded, thereby is absorbed in the vicious circle that causes further from this part seepage electrolyte, institute so that battery performance sharply reduce.
And then because the reaction of bonding agent and the electrolyte in the section exposed division when producing peeling off of aluminium lamination and resin bed, the aluminium lamination that strips out contacts the generation internal short-circuit with negative pole, and battery performance sharply reduces.
The present invention In view of the foregoing develops, its objective is that establishment can prevent the battery pack structure that reduces because of the battery performance that causes as the end section corrosion of the laminated material of battery case constituent material etc. and the manufacture method of this battery case, and a kind of thin sealed battery good on preservation characteristics and reliability is provided therefrom.
Above-mentioned purpose can be reached by following invention.
(1) a kind of thin sealed battery, it have with by adhesive layer on the two sides of aluminium lamination near stacked fusing together the end of lamellar laminated material of resin bed and form the battery case of spatial accommodation in inside and be contained in electrolyte and generating key element in the above-mentioned spatial accommodation, this thin sealed battery is characterised in that: at least 1 end of above-mentioned laminated material is present in the above-mentioned spatial accommodation, and the section that is present in this end in the spatial accommodation is covered by resin.
As be this structure, then because of the end section that is present in the spatial accommodation is covered by resin, so electrolyte can not invaded the interface of each layer.Therefore, can prevent the solution leakage that causes because of the reduction of adhesive layer adhesion strength or aluminium lamination corrosion or internal short-circuit etc.
(2) a kind of thin sealed battery, it has and will make the stacked laminated material of aluminium lamination and resin bed by adhesive layer, be near overlapping fusing together and form the battery case of spatial accommodation in inside and be contained in electrolyte and generating key element in the above-mentioned spatial accommodation end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer with the section exposed division that exposes, this thin sealed battery is characterised in that: 1 pair of section exposed division of above-mentioned laminated material is present in the outside of above-mentioned battery case and is not present in the spatial accommodation.
In this structure, because the section exposed division of laminated material is not present in the spatial accommodation, so can prevent the battery performance reduction that causes because of the reaction of section exposed division and electrolyte etc. reliably.
In addition, be not present in method in the spatial accommodation, need only make thin sealed battery according to the manufacture method of explanation in following (4) and can realize as this section exposed division that makes laminated material.
(3) a kind of thin sealed battery, it have with make by adhesive layer aluminium lamination and resin bed stacked and at least one surperficial be the laminated material of resin bed, be near overlapping fusing together and form the battery case of spatial accommodation in the inside end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer with the section exposed division that exposes, and be contained in electrolyte and generating key element in the above-mentioned spatial accommodation, this thin sealed battery is characterised in that: the medial surface of above-mentioned battery case is a resin bed, above-mentioned 1 pair of section exposed division is configured in the spatial accommodation, and its surface is covered by resin.
As above-mentioned resin, employing be to battery component stabilized resins such as electrolyte.Therefore, as according to this configuration, then because the inwall (wall of spatial accommodation) of battery case is a resin bed, so can hold electrolyte long-term and stably.In addition, in this structure, the resin that covers the section exposed division can prevent that adhesive layer and aluminium lamination from contacting with electrolyte, therefore, be configured in the spatial accommodation even will constitute 1 pair of section exposed division of the laminated material of battery case, also can prevent to worsen because of the battery performance that the reaction of section exposed division and electrolyte etc. causes.
Here, as the method that covers the section exposed division that is present in the laminated material in the spatial accommodation portion by resin, need only make thin sealed battery according to the manufacture method of explanation in following (5)～(8) and can realize.In addition, because the lateral surface of battery case and electrolyte etc. do not contact, so lateral surface also can be used aluminium lamination, but when battery is crooked, be easy to only on aluminium lamination, crack etc., so, consider from intensity, preferably adopt the laminated material of two sides configuration resin bed in table.
(4) a kind of manufacture method of thin sealed battery, it have with make by adhesive layer aluminium lamination and resin bed stacked and at least one surperficial be the laminated material of resin bed, be to overlap near the end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer and thereby this overlapping heating and fusing is produced on the 1st step that inside has the battery case of spatial accommodation with the section exposed division that exposes, and electrolyte and generating key element is contained in the 2nd step in the above-mentioned spatial accommodation, this thin sealed battery manufacture method is characterised in that: above-mentioned the 1st step is the inboard that the resin bed that will form the surface of above-mentioned laminated material is configured in battery case, and near the medial surface the end of 1 pair of relative section exposed division is overlaped, then thereby this overlapping heating and fusing is produced on the operation that inside has the battery case of spatial accommodation.
Under the state that the medial surface that makes laminated material overlaps, together the time, the section exposed division of laminated material always is present in outside the spatial accommodation near the heating and fusing laminated material end.Therefore, as according to this configuration, then can prevent reliably because of the section exposed division contacts the bonding force reduction of the adhesive layer that causes and the corrosion of aluminium lamination with electrolyte, and cost is increased thereupon.
In addition, in this structure, resin bed is configured in the medial surface of battery case, has same meaning described in this and above (3).Certainly making two surfaces of battery case all is resin bed.These aspects also are same in following invention.
(5) in the invention of above-mentioned (4), can adopt following operation to replace above-mentioned the 1st step.
The resin bed of above-mentioned laminated material is configured in the battery case inboard and near the not coplanar the end of 1 pair of relative section exposed division is overlaped, uses then than this overlapping wide heater thereby this overlapping heating and fusing is produced on the operation that inside has the battery case of spatial accommodation.
When the not coplanar (medial surface and lateral surface) with laminated material overlaps and forms tubular structure, with a section exposed division that makes laminated material be present in tubular structure inside, be in the spatial accommodation.But, as use than this overlapping wide heater overlapping portion is heated, then near the resin bed this end will melt outflow, and the resin that is flowed out by fusing covers the section exposed division.Because this resin covering film can prevent that the section exposed division from contacting with electrolyte, so can prevent that the bonding force of adhesive layer from reducing and the corrosion of aluminium lamination.
(6) in the invention of above-mentioned (4), can adopt following operation to replace above-mentioned the 1st step.
The resin bed of above-mentioned laminated material is configured in the battery case inboard and thereby near the not coplanar the end of 1 pair of relative section exposed division is overlaped, is being positioned near the thin resin plate of fitting the section exposed division of inner space side, then will this overlapping be produced on the operation that inside has the battery case of spatial accommodation with above-mentioned thin resin plate heating and fusing simultaneously.
In this structure that near the not coplanar the end is overlaped, a section exposed division of laminated material also is present in the spatial accommodation.But, when under near the state that disposes thin resin plate the end that is being positioned at the inner space overlapping portion being heated, thin resin plate fusing, thereby under the state that the section exposed division is covered, fuse.Therefore, the section exposed division that exposes of each layer can directly not contact with electrolyte.
As adopt this configuration to approach the structure of resin plate, and then compare with the form of above-mentioned (5), can cover the section exposed division by resin more reliably.
(7) a kind of manufacture method of thin sealed battery, it has and will make aluminium lamination and resin bed stacked and resin bed is configured in the laminated material on two sides in the table by adhesive layer, thereby be to overlap near the end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer and will this overlapping fuse to be produced on the 1st step that inside has the battery case of spatial accommodation with the section exposed division that exposes, and electrolyte and generating key element is contained in the 2nd step in the above-mentioned spatial accommodation, this thin sealed battery manufacture method is characterised in that: above-mentioned the 1st step is that 1 pair of section exposed division is configured in the spatial accommodation, and near the lateral surface the end of 1 pair of section exposed division is overlaped, near this section exposed division, fit then and approach resin plate, thereby and will this overlapping be produced on the operation that inside has the battery case of spatial accommodation with this thin resin plate heating and fusing.
Overlap and when forming tubular structure, the 1 pair of section exposed division that constitutes overlapping fore-end will be present in the spatial accommodation at lateral surface laminated material.But, if under near the state that disposes thin resin plate the end with the said structure of overlapping heating and fusing, then should thin resin plate fusing when heating flow out and cover the section exposed division.Therefore, even 1 pair of section exposed division is configured in structure in the spatial accommodation, can solve also that bonding force that the reaction because of electrolyte and binding agent causes reduces and the problem of aluminium lamination corrosion.In addition, in this structure, on the battery outer surface that the user can see, there is not the rough overlapping portion that produces, therefore has the advantage that looks very attractive in appearance.
(8) in the invention of above-mentioned (7), can adopt following operation to replace above-mentioned the 1st step.
1 pair of section exposed division is configured in the spatial accommodation and with near the lateral surface the end of 1 pair of section exposed division overlap, front part that further will this overlapping portion is crooked and thereby above-mentioned overlapping heating and fusing being adjacent to, will having then flexure plane with resin layer surface is produced on the operation that inside has the battery case of spatial accommodation.
In this structure, will be present in the front bending of the overlapping portion of battery case inside, and sweep and another resin bed position will be adjacent to, under this state with overlapping heating and fusing.In this manner, because with resin bed that the front end section exposed division of bending is coated, thereby can isolate with spatial accommodation.In addition, can the bend and the resin bed beyond this part that comprise front end is together partially fused, make the resin of fusion on the section exposed division, form coverlay, so section exposed division and spatial accommodation portion can be isolated.
(9) in the invention of above-mentioned (7), can adopt following operation to replace above-mentioned the 1st step.
1 pair of section exposed division is configured in the spatial accommodation and with near the lateral surface the end of 1 pair of section exposed division overlap, further thereby the front part by will this overlapping portion is involved in to the inside and makes a pair of section exposed division and spatial accommodation isolate, will have then and be involved in above-mentioned overlapping heating and fusing partly and be produced on the operation that inside has the battery case of spatial accommodation.
In this structure, the front of this overlapping portion partly is involved in, a pair of section exposed division and spatial accommodation are isolated, then with this part heating and fusing, so can use the coated section exposed division of resin bed more reliably.
Fig. 1 is the front view of the thin sealed battery of the embodiment of the invention 1.
Fig. 2 is that the A-A of Fig. 1 is to cutaway view.
Fig. 3 is the cutaway view of the thin sealed battery production process of the expression embodiment of the invention 1.
Fig. 4 is the amplification view of the fusion portion of the embodiment of the invention 1.
Fig. 5 is the rearview of the thin sealed battery of the embodiment of the invention 2.
Fig. 6 is the cutaway view of the thin sealed battery production process of the expression embodiment of the invention 2.
Fig. 7 is the amplification view of the fusion portion of the embodiment of the invention 2.
Fig. 8 is the rearview of the thin sealed battery of the embodiment of the invention 3.
Fig. 9 is the cutaway view of the thin sealed battery production process of the expression embodiment of the invention 3.
Figure 10 is the amplification view of the fusion portion of the embodiment of the invention 3.
Figure 11 is the rearview of the thin sealed battery of the embodiment of the invention 4.
Figure 12 is the cutaway view of the thin sealed battery production process of the expression embodiment of the invention 4.
Figure 13 is the amplification view of the fusion portion of the embodiment of the invention 4.
Figure 14 is the rearview of the thin sealed battery of the embodiment of the invention 5.
Figure 15 is the cutaway view that is used to illustrate the battery case production process of the embodiment of the invention 5.
Figure 16 is the cutaway view that is used to illustrate the thin sealed battery production process of the embodiment of the invention 5.
Figure 17 is the amplification view of the fusion portion of the embodiment of the invention 5.
Figure 18 is the cutaway view of the thin sealed battery production process of expression comparative example 1.
Figure 19 is the amplification view of the fusion portion of comparative example 1.
Figure 20 is the cutaway view of the thin sealed battery production process of expression comparative example 2.
Figure 21 is the amplification view of the fusion portion of comparative example 2.
The present invention will be described according to embodiment.
(embodiment 1)
The thin sealed battery of embodiment 1 is described according to Fig. 1-Fig. 4.Fig. 1 is the front view of the thin sealed battery of embodiment 1, Fig. 2 be the A-A of Fig. 1 to cutaway view, Fig. 3 is the cutaway view of the thin sealed battery production process of the expression embodiment of the invention 1, Fig. 4 is the amplification view of fused portion.
Thin sealed battery of the present invention has generating key element 4, and it comprises by LiCoO
2The positive pole 1 that constitutes, the negative pole 2 that constitutes by carbon materials, and with the dividing plate 3 of these two electrode isolation.This key element 4 of generating electricity as shown in Figure 2, is configured in the spatial accommodation 5 of battery case, and this spatial accommodation 5 forms by by sealing 6a, 6b, 6c the upper and lower side of battery case 6 and left end being sealed.In addition, in spatial accommodation 5, inject ratio with 1M (mol) with LiPF
6Be dissolved in by 3: 7 volume ratio the electrolyte in ethylene carbonate (EC) and the mixed mixed solvent of carbonic acid diethyl ester (DEC).
Constitute battery case 6 (thickness: the concrete structure of laminated material 100 μ m), as shown in Figure 4, resin bed 12 (the thickness: that will constitute by polypropylene 30 μ m) by by carbamate being the adhesive layer (thickness: be 5 μ m that binding agent constitutes, not shown) be bonded in aluminium lamination 11 (thickness: on the surface 30 μ m), and the resin bed 13 that will constitute by polypropylene (thickness: 30 μ m) adhesive layer by being made of modified polypropene (thickness: be 5 μ m, not shown) is bonded on another surface of aluminium lamination 11.In this structure, what be present in the aluminium lamination 11 of end of battery case 6 and resin bed 12,13 exposes interface 14 ... (also claiming the section exposed division), be present in outside the battery case.Therefore, electrolyte can be from the interface 14 ... invade, thereby can prevent the deterioration of the laminated material that causes because of electrolyte.
In addition, above-mentioned battery as shown in Figure 1, structurally makes anodal 1 to be connected in the positive current-collecting terminals 7 that is made of aluminium, and negative pole 2 is connected with the negative current-collecting terminals 8 that is made of nickel, the chemical energy that inside battery produces can be outputed to the outside as electric energy.And the physical dimension of this battery is width L
1Be 36mm, length L
265mm, and the width of sealing 6a, 6b, 6c is 5mm.
The battery of said structure is made by following operation.
At first, preparation is by the lamellar laminated material of 5 layers of structures formation of resin bed (polypropylene)/adhesive layer/aluminium alloy layer/adhesive layer/resin bed (polypropylene), and as shown in Figure 3, with near medial surface 18a, the 18b end of this laminated material 18 formation tubular that overlaps, under the state of the inside that pedestal 15 is configured in tube with overlapping 19 heating and fusing.Thus, form sealing 6c (Fig. 1,2).Then, the peristome of generating key element 4 from this tubular laminated material 18 is inserted in the spatial accommodation 5.When inserting, be configured to make two current- collecting terminals 7,8 to stretch out generating key element 4, and under this state, will fuse at the laminated material 18 that peristome stretch out two current-collecting terminals 7,8 with the high-frequency induction fusion splicing devices from the peristome (the 6a part of Fig. 1) of tubular laminated material 18.Thus, form sealing 6a.After this, the above-mentioned tubular box of having laid the generating key element is carried out 2 hours vacuum and heating drying (temperature: 105 ℃), in order to the moisture of laminated material 18 and generating key element 4 is removed.Then, in above-mentioned tubular box, injecting will be as the LiPF of solute with the ratio of 1M (mol)
6Be dissolved in by 3: 7 volume ratio the electrolyte in ethylene carbonate and the mixed mixed solvent of carbonic acid diethyl ester, and under this state, placed 1 hour.Then, one side is pressurizeed across 18 pairs of laminated materials generating key element 4 with metallic plate, one side with ultrasonic wave welding device will with end (above-mentioned another peristome) fusion of the laminated material 18 of the opposite side of above-mentioned sealing 6a, formation sealing 6b.Promptly can be made into thin sealed battery by as above operation.
In addition, the later operation of above-mentioned electrolyte injection process is carried out in being filled with the drying box of argon gas.
The above-mentioned battery of making is called battery A1 of the present invention.
Here, as the resin bed of above-mentioned battery case, be not limited to above-mentioned polypropylene, for example, also can adopt: polyenes such as polyethylene are macromolecule; Polyesters such as polyethylene terephthalate are macromolecule; Fluoridize polyethylene-based macromolecules such as ethenylidene, Corvic; Polyamide such as nylon 6, nylon 66, nylon 7 are macromolecule etc.
In addition, as the thickness of resin bed, be more than the 1 μ m, below the 500 μ m, preferably more than the 5 μ m, below the 100 μ m,, be more than the 0.1 μ m, below the 200 μ m, preferably more than the 1 μ m, below the 50 μ m as metal layer thickness.Its reason is, too small as the thickness of metal level or resin bed, then the permeability of oxygen is strong, thus exist problems such as making the battery behavior reduction, excessive as the thickness of resin bed on the other hand, then exist problems such as processing characteristics reduction.In addition, when metal layer thickness is excessive, generation is made the problems such as flexibility difference of battery weight increase or battery.For reason given above, as the gross thickness of resin/metal laminate, be more than the 2 μ m, below the 1mm, preferably more than the 10 μ m, below the 200 μ m
In addition, as positive electrode, be not limited to above-mentioned LiCoO
2, for example, also can adopt LiNiO
2, LiMn
2O
4, or the complex of these materials etc.
The present invention is not limited to above-mentioned lithium ion battery, also is applicable to other batteries such as polymer battery that have solid electrolyte between both positive and negative polarity.
In addition, in above-mentioned form, when laminated material 18 is constituted tubular, adopted pedestal 15, but be not limited to this method, also can directly replace pedestal 15 to make laminated material 18 become tubular with generating key element 4.
(embodiment 2)
The thin sealed battery of embodiment 2 is described according to Fig. 5～Fig. 7.In addition, the member that the situation with the foregoing description 1 is had a same function is marked with the symbol identical with embodiment 1, and its explanation is omitted.
Fig. 5 is the rearview of the thin sealed battery of embodiment 2, and Fig. 6 is the cutaway view of the operation of the expression thin sealed battery of making embodiment 2, and Fig. 7 is the amplification view of overlapping portion.As Fig. 5～shown in Figure 7, the shape difference of the battery case of embodiment 2 and embodiment 1 is that one that forms overleaf in sealing 6c and the only a pair of section exposed division is present in outside the spatial accommodation.
Above-mentioned sealing 6c as shown in Figure 7, forms with 12 fusions of lateral surface resin bed by the medial surface resin bed 13 with laminated material 18.At this moment, as shown in Figure 6, adopt width (25mm) to carry out heating and fusing with metal die 20, and make sealing 6c greater than the heating of overlapping 19 width (20mm).When adopting this manufacture method,, covered by resin 21 so expose interface 14,14 (section exposed division) owing to be that near interface 14,14 resin beds 12,13 that expose that are present in aluminium lamination 11 and resin bed 12 are melted.Therefore, can prevent that the section exposed division of inside battery from contacting with electrolyte etc.
To be called battery A2 of the present invention by the battery that method is as mentioned above made.
(embodiment 3)
According to Fig. 8～Figure 10, embodiment 3 is described.In addition, to being marked with identical symbol, and its explanation is omitted with member that the foregoing description 1 has a same function.
Fig. 8 is the rearview of the thin sealed battery of embodiment 3, and Fig. 9 is the cutaway view of the thin sealed battery production process of expression embodiment 3, and Figure 10 is the amplification view of overlapping portion.Shown in Fig. 8,9, embodiment 3 is with the difference of embodiment 1, forms sealing 6c at the back side of battery case, only in a pair of section exposed division is present in outside, and the following item of spatial accommodation.
Above-mentioned sealing 6c, as shown in figure 10, form with lateral surface resin bed 12 heating and fusing by medial surface resin bed 13 laminated material 18, but when heating and fusing, as shown in Figure 9, in near exposing the interface 14,14 of aluminium lamination 11 and resin bed 12,13, the lamellar resin sheet 23 that configuration is made of polypropylene (width: 5mm, thickness: 50 μ m), adopt width to carry out heating and fusing with 20 pairs of resin sheets 23 of metal die and overlapping 19 simultaneously greater than the heating of overlapping 19 width.Thus, formed and used the lamellar resin sheet 23 that constitutes by polypropylene (width: 5mm, thickness: 50 μ m) cover the sealing 6c of the section exposed division that exposes at interface 14,14.If the battery of this structure then can prevent to contact the deterioration of the adhesive layer that causes or peeling off of aluminium lamination with electrolyte because of the section exposed division.
In addition, in the foregoing description 3, adopted width greater than the heating of overlapping 19 width with metal die 20, but as prolong heating time or improve heating-up temperature, even then adopt width and overlapping 's 19 width heating about equally also can obtain same effect with metal die 20.But, consider from finish this point with lower temperature, preferably use the big heating metal die of width.
Below, will be called battery A3 of the present invention by the battery that operation is as mentioned above made.
(embodiment 4)
Below, according to Figure 11～Figure 13 embodiment 4 is described.In addition, to being marked with identical symbol, and its explanation is omitted with member that the foregoing description 1 has a same function.
Figure 11 is the rearview of the thin sealed battery of embodiment 4, and Figure 12 is the cutaway view of the thin sealed battery production process of expression embodiment 4, and Figure 13 is the amplification view of fused portion.Shown in Figure 11～13, embodiment 4 is with the difference of embodiment 1, sealing 6c forms at the back side of battery case, fuses with the end bending to the inside of laminated material and with the overlapping back of the lateral surface of its lateral surface and another end, in addition, also be with the difference of embodiment 1, as shown in figure 12, when fusion, expose interface 14 at aluminium lamination 11 and resin bed 12,13 ... near (section exposed division), configuration resin sheet 23, adopt width to carry out heating and fusing with metal die 20 simultaneously, thereby make sealing 6c greater than the heating of the width of sealing 6c.
In the structure of this embodiment 4,1 pair of section extending part is in the spatial accommodation of battery case, but because of the surface of section exposed division is covered by resin sheet 23, so can prevent to expose interface 14 ... contact with electrolyte etc.
In addition, the same with the foregoing description 3, in embodiment 4, also can adopt width and overlapping 19 width heating usefulness metal die 20 about equally by regulating heating time or heating-up temperature.
(embodiment 5)
Below, according to Figure 14～Figure 17 embodiment 5 is described.In addition, to being marked with identical symbol, and its explanation is omitted with member that the foregoing description 1 has a same function.
Figure 14 is the rearview of the thin sealed battery of embodiment 5, the cutaway view of Figure 15 state that to be expression overlap the lateral surface of laminated material, Figure 16 is used to illustrate the cutaway view that carries out the operation of heating and fusing at the fore-end with the faying surface of Figure 15 under the state of battery lateral direction bending, and Figure 17 is the cutaway view of the major part after sweep shown in Figure 16 is amplified.As Figure 14～shown in Figure 17, the difference of the battery of the battery case of embodiment 5 and embodiment 1 is, forms sealing 6c at the back side of battery case, simultaneously relative a pair of section exposed division is present in the battery case etc.
Above-mentioned sealing 6c, shown in Figure 15～17, make relative a pair of section extending part in battery case, and the lateral surface resin bed 12,12 of laminated material 18 overlaped, partly be adjacent to overlapping 19 180 ° of front bendings and with another resin bed then, under this state, carry out heating and fusing, thereby make sealing 6c.As according to as above operation, then the front end of sweep (section exposed division) becomes the coated state of resin bed that is bent end, thereby isolates with spatial accommodation 5.Therefore, can prevent to expose interface 14 ... contact with electrolyte etc.
Below, will be called battery A3 of the present invention by the battery that operation is as mentioned above made.
In addition, in above-mentioned, partly be adjacent to, but also overlapping 19 front can be involved in by spirality, the section exposed division is involved in to the inside with overlapping 19 180 ° of front bendings and with another resin bed.As according to this operation, the section exposed division is isolated more reliably with spatial accommodation 5.
(comparative example)
As shown in figure 18, except making overlapping 19 width (20mm), make battery with the operation identical with the foregoing description 2 with the width (20mm) of heater 20 equates.In the battery of this structure, as shown in figure 19, section exposed division 14,14 is not covered by resin, but is present in the spatial accommodation 5 with the state that exposes.
Below, will be called comparison battery X1 by the battery that as above operation is made.
(comparative example 2)
As Figure 20 and shown in Figure 21, except the width (20mm) that makes overlapping 19 equate with the width (20mm) of heater 20 and in addition also with an end of laminated material 18 to 180 ° of battery inside bend, make battery with the operation identical with the foregoing description 2.In the battery of this structure, as shown in figure 21, section exposed division 14 ... do not covered, but be present in the spatial accommodation 5 with the state that exposes by resin.
Below, will be called comparison battery X2 by the battery that as above operation is made.
(experiment 1)
To the invention described above battery A1～A3 and comparison battery X1, X2, checked battery has been peeled off the solution leakage incidence that cause because of aluminium lamination and resin bed at 60 ℃ after down preserving 20 days, and experimental result has been shown in table 1.And the sample number is 100 on each battery.
Table 1
| Battery variety | Solution leakage incidence (%) |
| Battery A1 of the present invention | ??????????0 |
| Battery A2 of the present invention | ??????????0 |
| Battery A3 of the present invention | ??????????0 |
| Compare battery X1 | ??????????4 |
| Compare battery X2 | ??????????5 |
Can know from table 1 and to find out that in battery A1～A3 of the present invention, the solution leakage incidence all is 0% that different therewith, in relatively battery X1, X2, the solution leakage incidence is respectively 4%, 5%.Even this be since in battery A1～A3 of the present invention as mentioned above the section exposed division of laminated material be present in outside the spatial accommodation or be present in the spatial accommodation but cover by resin, corrode so can prevent the bonding force reduction of the adhesive layer that the reaction because of the adhesive layer that exposes the interface and electrolyte causes or the aluminium lamination that causes because of the reaction of hydrofluoric acid and aluminium.Different therewith, in comparing battery X1, X2, as Figure 19 and shown in Figure 21, because the end of laminated material 18 is present in the spatial accommodation and is not covered by resin, so aluminium lamination that the bonding force that can expect consequently the adhesive layer that the reaction because of adhesive layer and electrolyte causes reduces or causes because of the reaction of hydrofluoric acid and aluminium corrodes and causes.
As mentioned above, according to the present invention, for exposing state, thereby the bonding force that can prevent the adhesive layer that the reaction because of adhesive layer and electrolyte causes reduces the end section that can prevent laminated material or the aluminium lamination that causes because of the reaction of hydrofluoric acid and aluminium corrodes in spatial accommodation.Therefore, can suppress solution leakage and beyond battery or in battery, be short-circuited,,, then adopt the preservation characteristics and the reliability of the thin sealed battery of the battery case that constitutes by lamellar laminated material to improve as according to the present invention as its result.
Claims (9)
1. thin sealed battery, it have with by adhesive layer on the two sides of aluminium lamination near stacked fusing together the end of lamellar laminated material of resin bed and form the battery case of spatial accommodation in inside and be contained in electrolyte and generating key element in the above-mentioned spatial accommodation, this thin sealed battery is characterised in that: at least 1 end of above-mentioned laminated material is present in the above-mentioned spatial accommodation, and the section that is present in this end in the spatial accommodation is covered by resin.
2. thin sealed battery, it has and will make the stacked laminated material of aluminium lamination and resin bed by adhesive layer, be near overlapping fusing together and form the battery case of spatial accommodation in inside and be contained in electrolyte and generating key element in the above-mentioned spatial accommodation end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer with the section exposed division that exposes, this thin sealed battery is characterised in that: 1 pair of section exposed division of above-mentioned laminated material is present in the outside of above-mentioned battery case and is not present in the spatial accommodation.
3. thin sealed battery, it have with make by adhesive layer aluminium lamination and resin bed stacked and at least one surperficial be the laminated material of resin bed, be near overlapping fusing together and form the battery case of spatial accommodation in the inside end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer with the section exposed division that exposes, and be contained in electrolyte and generating key element in the above-mentioned spatial accommodation, this thin sealed battery is characterised in that: the medial surface of above-mentioned battery case is a resin bed, above-mentioned 1 pair of section exposed division is configured in the spatial accommodation, and its surface is covered by resin.
4. the manufacture method of a thin sealed battery, it have with make by adhesive layer aluminium lamination and resin bed stacked and at least one surperficial be the laminated material of resin bed, be to overlap near the end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer and thereby this overlapping heating and fusing is produced on the 1st step that inside has the battery case of spatial accommodation with the section exposed division that exposes, and electrolyte and generating key element is contained in the 2nd step in the above-mentioned spatial accommodation, this thin sealed battery manufacture method is characterised in that: above-mentioned the 1st step is the inboard that the resin bed that will form the surface of above-mentioned laminated material is configured in battery case, and near the medial surface the end of 1 pair of relative section exposed division is overlaped, then thereby this overlapping heating and fusing is produced on the operation that inside has the battery case of spatial accommodation.
5. the manufacture method of thin sealed battery according to claim 4, it is characterized in that: above-mentioned the 1st step, thus be that resin bed with above-mentioned laminated material is configured in the battery case inboard and near the not coplanar the end of 1 pair of relative section exposed division is overlaped, uses then than this overlapping wide heater this overlapping heating and fusing is produced on the operation that inside has the battery case of spatial accommodation.
6. the manufacture method of thin sealed battery according to claim 4, it is characterized in that: above-mentioned the 1st step, thus be that resin bed with above-mentioned laminated material is configured in the battery case inboard and near the not coplanar the end of 1 pair of relative section exposed division is overlaped, is being positioned near the thin resin plate of fitting the section exposed division of inner space side, then will this overlapping be produced on the operation that inside has the battery case of spatial accommodation with above-mentioned thin resin plate heating and fusing simultaneously.
7. the manufacture method of a thin sealed battery, it has and will make aluminium lamination and resin bed stacked and resin bed is configured in the laminated material on two sides in the table by adhesive layer, thereby be to overlap near the end of 1 pair of relative section exposed division of the lamellar laminated material of above-mentioned each layer and will this overlapping fuse to be produced on the 1st step that inside has the battery case of spatial accommodation with the section exposed division that exposes, and electrolyte and generating key element is contained in the 2nd step in the above-mentioned spatial accommodation, this thin sealed battery manufacture method is characterised in that: above-mentioned the 1st step is that 1 pair of section exposed division is configured in the spatial accommodation, and near the lateral surface the end of 1 pair of section exposed division is overlaped, near this section exposed division, fit then and approach resin plate, thereby and will this overlapping be produced on the operation that inside has the battery case of spatial accommodation with this thin resin plate heating and fusing.
8. the manufacture method of thin sealed battery according to claim 7, it is characterized in that: above-mentioned the 1st step, thereby be 1 pair of section exposed division is configured in the spatial accommodation and with near the lateral surface the end of 1 pair of section exposed division overlap, front part that further will this overlapping portion is crooked and above-mentioned overlapping heating and fusing being adjacent to, will having then flexure plane with resin layer surface is produced on the operation that inside has the battery case of spatial accommodation.
9. the manufacture method of thin sealed battery according to claim 7, it is characterized in that: above-mentioned the 1st step, thereby be 1 pair of section exposed division is configured in the spatial accommodation and with near the lateral surface the end of 1 pair of section exposed division overlap, further the front part by will this overlapping portion is involved in to the inside and makes a pair of section exposed division and spatial accommodation isolate, will have then and be involved in above-mentioned overlapping heating and fusing partly and be produced on the operation that inside has the battery case of spatial accommodation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99101337A CN1224249A (en) | 1998-01-21 | 1999-01-21 | Thin sealed battery and producing method thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9457/98 | 1998-01-21 | ||
| CN99101337A CN1224249A (en) | 1998-01-21 | 1999-01-21 | Thin sealed battery and producing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1224249A true CN1224249A (en) | 1999-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99101337A Pending CN1224249A (en) | 1998-01-21 | 1999-01-21 | Thin sealed battery and producing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224249A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416907C (en) * | 2002-12-17 | 2008-09-03 | 三星Sdi株式会社 | Bag-type lithium accumulator cell |
| CN103022385A (en) * | 2011-09-21 | 2013-04-03 | 株式会社杰士汤浅国际 | Battery |
| CN107528041A (en) * | 2016-06-22 | 2017-12-29 | 株式会社半导体能源研究所 | The manufacture method of battery and battery |
| CN108028448A (en) * | 2016-05-31 | 2018-05-11 | 株式会社Lg化学 | Battery unit comprising phase-change material |
| CN108274850A (en) * | 2013-10-30 | 2018-07-13 | 高露洁-棕榄公司 | It packs and for making the material packed |
| CN108352464A (en) * | 2015-10-27 | 2018-07-31 | 株式会社半导体能源研究所 | The manufacturing method of battery and battery |
| CN109109390A (en) * | 2014-09-25 | 2019-01-01 | 昭和电工包装株式会社 | Electrical storage device cast exterior body and electrical storage device |
-
1999
- 1999-01-21 CN CN99101337A patent/CN1224249A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416907C (en) * | 2002-12-17 | 2008-09-03 | 三星Sdi株式会社 | Bag-type lithium accumulator cell |
| CN103022385A (en) * | 2011-09-21 | 2013-04-03 | 株式会社杰士汤浅国际 | Battery |
| CN103022385B (en) * | 2011-09-21 | 2016-06-29 | 株式会社杰士汤浅国际 | Battery |
| CN108274850A (en) * | 2013-10-30 | 2018-07-13 | 高露洁-棕榄公司 | It packs and for making the material packed |
| CN109109390A (en) * | 2014-09-25 | 2019-01-01 | 昭和电工包装株式会社 | Electrical storage device cast exterior body and electrical storage device |
| CN108352464A (en) * | 2015-10-27 | 2018-07-31 | 株式会社半导体能源研究所 | The manufacturing method of battery and battery |
| US11201368B2 (en) | 2015-10-27 | 2021-12-14 | Semiconductor Energy Laboratory Co., Ltd. | Battery and method for manufacturing battery |
| CN108352464B (en) * | 2015-10-27 | 2022-01-25 | 株式会社半导体能源研究所 | Battery and method for manufacturing battery |
| CN114512746A (en) * | 2015-10-27 | 2022-05-17 | 株式会社半导体能源研究所 | Battery and method for manufacturing battery |
| CN108028448A (en) * | 2016-05-31 | 2018-05-11 | 株式会社Lg化学 | Battery unit comprising phase-change material |
| CN107528041A (en) * | 2016-06-22 | 2017-12-29 | 株式会社半导体能源研究所 | The manufacture method of battery and battery |
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