CN103050645A - Method for packaging battery cell, plastic-aluminum membrane single sheet, and packaging body of battery cell and plastic-aluminum membrane monolithic - Google Patents
Method for packaging battery cell, plastic-aluminum membrane single sheet, and packaging body of battery cell and plastic-aluminum membrane monolithic Download PDFInfo
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- CN103050645A CN103050645A CN2012105386254A CN201210538625A CN103050645A CN 103050645 A CN103050645 A CN 103050645A CN 2012105386254 A CN2012105386254 A CN 2012105386254A CN 201210538625 A CN201210538625 A CN 201210538625A CN 103050645 A CN103050645 A CN 103050645A
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- battery core
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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
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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
- 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
Abstract
The invention discloses a method for packaging a battery cell, comprising the following steps of: cutting a plastic-aluminum diaphragm to be a plastic-aluminum membrane single sheet capable of containing an electric core groove bigger than the electric core; stamping the plastic-aluminum membrane single sheet to form the electric core groove; placing the electric core into a first electric core groove of a first plastic-aluminum membrane single sheet with the electric core groove, thereby accommodating a part of the electric core in the first electric core groove, and covering a second plastic-aluminum membrane single sheet with an electric core groove on the first plastic-aluminum membrane single sheet with the electric core groove, to accommodate the residual part of the electric core in the second electric core groove of the second plastic-aluminum membrane single sheet with the electric core groove to obtain a packaging body; hot-pressing the four edges of the packaging body to sealing the edges, and leading out an electrode on one side to obtain an electric core semi-finished product; and treating the electric core semi-finished product by baking, liquid injection, formation, secondary edge sealing, trimming, flanging and partial volume to obtain the battery finished product.
Description
Technical field
The structure of the method for packing, encapsulation that the present invention relates to battery after with material and encapsulation concretely, relates to the method that lithium battery electric core encapsulated with aluminum plastic film, is used for the material that encapsulates and the structure after the encapsulation.
Background technology
Traditional circular battery core encapsulation is generally metallic packaging, its general manufacturing process generally include with metallic plate directly stamp out basic and the battery to be wrapped battery core with dark battery core groove, battery battery core is put into the battery core groove, inject auxiliary material, use again the processing steps such as dull and stereotyped cover plate opening seal welding.In use there is the increasing potential safety hazard in such encapsulating structure; especially when battery core is operated in the hot environment; the unstable release of the energy that battery core is less can be sealed in the metallic packaging and can not damage; and release energy when larger when this is unstable; may break through the protection of metallic packaging; thereby blast; when blast occurs; metallic packaging can be destroyed in the part; metal fragment may be in blast process outside high-speed motion, thereby the personnel such as user in the surrounding environment are damaged.
Along with the extensive use of lithium battery, occurred in the prior art adopting aluminum plastic film as the technique of battery battery core encapsulating material.In this technique, the general size that is fit to the lithium battery of packing after the doubling that at first aluminum plastic film is cut to, but then on a doubling part of the aluminum plastic film of the doubling after the cutting, namely left part or right side/upper punch extrudes in the identical groove of lithium battery thickness and apart from the appearance air bag of this groove certain distance.In this kind technique, because battery to be packaged is relatively thin, generally only have 3 to 6mm, therefore, only need to extrude the battery core groove at a side blow, and opposite side remains the plane and need not punching press.After punching press is finished, the aluminum plastic film after the punching press is carried out cutting edge operation, and battery battery core is put into groove, again another doubling is partially folded, in one side installing electrodes; To two limits wherein carrying out the hot-pressing, edge-sealing operation and to sealing in advance operation in one side of remainder, after edge sealing is finished, the technique such as toast, make the gas in the battery core enter the appearance air bag, be close to again battery core the operation of secondary edge sealing is carried out on one side of pre edge seal, again pre edge seal and appearance air bag are cut off after finishing.
Benefit from the material behavior of aluminum plastic film self, the good plastic layer of one deck ductility is namely arranged, with and the edge sealing mode, even if the unstable energy of battery core occurs to be discharged, therefore aluminum plastic film can not produce chip yet, does not have chip at a high speed outwards motion and problem that personnel are on every side caused injury under the drive of explosion energy.
As the improvement to this technique, also there are a kind of two-sided punching press, packaging technology in the prior art, it is blocked up that this kind technique is intended to solve battery core, problem that can't the single face jet-bedding when for example reaching 12mm.In this kind technique, such as Fig. 4, shown in the 5a to 5c, but adopt two staking punch and corresponding mould on the aluminum plastic film after the cutting of a slice doubling once property stamp out two battery core mounting grooves, and the aluminium-plastic panel at least one side stamps out appearance air bag 42a, 42b, S401; After the aluminum plastic film doubling, finish follow-up packaging technology S402 ~ S403.Its subsequent technique and the front a kind of identical S404 of technique, S405 at a side blow piezoelectricity core groove.In this kind technique, because edge sealing after doubling during aluminum plastic film.Therefore, respectively the have an appointment degree of depth of 5 ~ 6mm of battery core groove 41a, the 41b of both sides, and for so that compact conformation after the doubling encapsulation, the distance between the two battery core grooves only has about 1-2mm, distance of this link part can not arbitrarily enlarge, otherwise the product of encapsulation not attractive in appearance, can't reach requirement.When carrying out the bilateral punching operation, because drift is to press down simultaneously from both sides, therefore, this coupling part has been born very large tensile force in fact, has substantially reached maximum limit of stretch.
So when battery is thicker, for example reach 25mm.When it is encapsulated, be subjected to the restriction of the material self-characteristic of aluminum plastic film, the battery core groove of the one-sided 25mm of stamping out is impossible.Obviously also be infeasible and adopt the liquidate technique of 12mm of both sides.Reason is, when both sides are stamped into 6 ~ 12mm simultaneously, middle less connecting portion can be under the pulling force of two drifts fracture.
Therefore, a kind of like this demand is arranged in the prior art, namely propose a kind ofly can adopt existing aluminum plastic film, the method that the thick battery of 12-25mm is encapsulated.
Summary of the invention
In order to solve aforementioned technical problem, one aspect of the present invention has proposed a kind of method that battery battery core is encapsulated, and it can be used for the overall package thickness for example battery battery core about 12-25mm or battery battery core group.
By the method, even if the thickness of lithium battery electric core reaches about 25mm, also can encapsulate it, and can not have potential safety hazard,
The method of this battery battery core encapsulation may further comprise the steps: with the plastic-aluminum diaphragm be cut to can hold an essence greater than or substantially equal the aluminum plastic film monolithic of a battery core groove of a battery core size to be packaged; This aluminum plastic film monolithic is carried out punching operation to stamp out this battery core groove; Thereby with battery core put into a slice first with one first battery core groove of the aluminum plastic film monolithic of battery core groove so that the part of battery core is contained in this first battery core groove, a slice second is covered this first with on the aluminum plastic film monolithic of battery core groove and so that the remainder that this second second battery core groove with the aluminum plastic film monolithic of battery core groove holds this battery core obtains a packaging body with the aluminum plastic film monolithic of battery core groove, this packaging body is carried out the edge sealing operation on four limits and obtains the semi-finished product battery core at one side extraction electrode, and this semi-finished product battery core is proceeded baking, fluid injection, change into, the secondary edge sealing, deburring, flanging, obtain the finished product battery behind the partial volume.
By the method that adopts battery battery core of the present invention to encapsulate, the space that holds battery of thickness 18 millimeter can be simply obtained, and traditional restriction on the thickness of two battery core grooves of punching press on the same aluminum plastic film monolithic can be avoided by four limit hot sealings.So just can realize easily jumbo lithium battery being encapsulated.In addition, because its mould does not need to make somewhat complex design, therefore reduced production cost.
Preferably, on the aluminum plastic film monolithic, also stamp out air bag; Change into and trimming process step between also comprise secondary encapsulation.The advantage of such configuration is and can the gas that produce in the formation process be discharged easily.
Preferably, after the punching press of aluminum plastic film monolithic is complete, alignment and the hot-pressing, edge-sealing of cutting to be conducive to aluminum plastic film monolithic in the subsequent handling carried out on four limits with the aluminum plastic film monolithic of battery core groove.
Preferably, the degree of depth of the battery core groove that described punching press obtains is about 6 to 13mm, is preferably about 9mm or 12mm.
Described battery core groove can be rectangular channel.Preferably, the described rectangular channel rectangular channel that has arc-shaped transition at the connecting portion of end face and two side elevations.Adopt the arc-shaped transition design effectively to alleviate or to avoid this changeover portion in the problem of punching course Fracture.Described transition arcs radius is 3 to 12mm, is preferably 9mm.
Preferably, the rectangular channel of the connecting portion of the bottom surface of described battery core groove and two side elevations with arc-shaped transition.Adopt the arc-shaped transition design effectively to alleviate or to avoid this changeover portion in the problem of punching course Fracture.Described transition arcs radius is 1-3mm, is preferably 2mm.
Another aspect of the present invention provides a kind of aluminum plastic film monolithic, and this aluminum plastic film monolithic has a battery core groove, the size of this this battery core groove of aluminum plastic film monolithic essence.By adopting this kind aluminum plastic film monolithic, can simply obtain the space that holds battery of thickness 25 millimeter, and can avoid traditional restriction on the thickness of two battery core grooves of punching press on the same aluminum plastic film monolithic by four limit hot sealings.So just can realize easily jumbo lithium battery being encapsulated.
Use aforementioned aluminum plastic film monolithic can also make the packaging body of a kind of battery battery core and aluminum plastic film monolithic, the packaging body of this battery battery core and aluminum plastic film monolithic comprises the first aluminum plastic film monolithic, the two the first aluminum plastic film monolithics; The battery core groove alignment relative of described the first aluminum plastic film monolithic, the two the first aluminum plastic film monolithics is to form battery space, and heat-sealing sealing around the accommodating battery battery core in the battery space, battery battery core is Yi Bian and arranging electrode.
More than narrated recapitulative scheme of the present invention from many aspects.Below in conjunction with accompanying drawing concrete execution mode of the present invention is described in detail.
Description of drawings
Fig. 1 is the process chart of the embodiment of a method according to the present present invention;
Fig. 2 a is the structure vertical view of the aluminum plastic film monolithic that obtains of the stamping procedure of a kind of embodiment of method of the present invention;
Fig. 2 b is the structural front view of the aluminum plastic film monolithic that obtains of the stamping procedure of a kind of embodiment of method of the present invention;
Fig. 2 c is the structural front view of the aluminum plastic film monolithic that obtains of the stamping procedure of the another kind of embodiment of method of the present invention;
Fig. 3 a is the front view of the semi-finished product battery core process that obtains of method of the present invention;
Fig. 3 b is the structure vertical view of the semi-finished product battery core that obtains of method of the present invention;
Fig. 4 is the flow chart of aluminum plastic film packaging technology of the prior art;
Fig. 5 a is the structure vertical view that monolithic is used in aluminum plastic film encapsulation of the prior art;
Fig. 5 b is the structural front view that monolithic is used in aluminum plastic film encapsulation of the prior art;
Fig. 5 c is the structure side view of the semi-finished product battery core process of aluminum plastic film encapsulation of the prior art.
Embodiment
Below with reference to accompanying drawings specific embodiment of the present invention is described in detail.Should be appreciated that these following detailed descriptions only are used for setting forth concept of the present invention and thereby detail is convenient to the reader understanding, it is not to be intended to the protection range of this patent is limited within the embodiment of description.The modifications and variations that persons skilled in the art have been done the technical scheme among the application according to following description content as long as no breaking away from inventive concept of the present invention, all are interpreted as having dropped within protection scope of the present invention.
Fig. 1 is the process chart of the embodiment of a kind of method of the present invention, its recapitulative description packaging technology of the present invention, it comprise with aluminum plastic film volume be cut to can hold an essence greater than or substantially equal the aluminum plastic film monolithic S101 of a battery core groove of the size of battery core to be packaged, so-called essence can allow easily battery core to be put into the battery core groove and can not make the upper surface of battery core groove that significantly distortion occurs greater than the size that refers to the battery core groove; And substantially equal to refer to allow battery core is just put into the battery core groove and stayed obvious gap; Then, this aluminum plastic film monolithic is carried out punching operation to stamp out this battery core groove S102; Thereby with battery core put into a slice first with one first battery core groove of the aluminum plastic film monolithic of battery core groove so that the part of battery core is contained in this first battery core groove S103, a slice second is covered this first with on the aluminum plastic film monolithic of battery core groove and so that the remainder that this second second battery core groove with the aluminum plastic film monolithic of battery core groove holds this battery core obtains a packaging body S104 with the aluminum plastic film monolithic of battery core groove, this packaging body is carried out the edge sealing operation on four limits and obtains semi-finished product battery core S105 in one side installing electrodes; And this semi-finished product battery core proceeded baking, fluid injection, changes into, obtains finished product battery S106 behind the secondary edge sealing, deburring, flanging, partial volume.
With reference to Fig. 1, also preferably stamp out air bag S121 at the aluminum plastic film monolithic; Change into and trimming process step between also comprise secondary encapsulation S161.The advantage of such configuration is and can the gas that produce in the process that change into be discharged easily.
On the whole, method of the present invention can be used for making the packaging technology of air bag, the packaging technology that also can be used for not making air bag.
As seen Fig. 2 a shows the vertical view of individual aluminum plastic film monolithic 100 that obtains by aforementioned stamping procedure of the present invention, upper from scheming, and punching press is by battery core groove 11 and air bag 12 on the aluminum plastic film monolithic 100.Fig. 2 b shows the end view of Fig. 2 a, herein, because punching press is to go out a battery core groove 11 at a slice aluminum plastic film 100; Therefore, it is darker to obtain the degree of depth, 6 to 13mm battery core groove for example, and for example, the degree of depth of the battery core groove that obtains by this method can reach about 9mm or 12mm.Should be appreciated that in some technique, on the aluminum plastic film monolithic, can form air bag 12, and in other techniques, can not form air bag 12 at the aluminum plastic film monolithic.
Packaging body can be that package assembly by Fig. 3 a obtains described in abovementioned steps S104 step.In Fig. 3 a, shown two aluminum plastic film monolithic 100a, 100b, and battery core 200 can be placed on just between two aluminum plastic film monolithic 100a, the 100b.Form packaging body shown in Fig. 3 b.Aforementioned packaging body will pass through follow-up edge sealing process.
Preferably, after the stamping procedure of aluminum plastic film monolithic is finished, can increase the pruning operation, the aluminum plastic film monolithic is trimmed to the shape that is fit to follow-up edge sealing.For example the part at each edge can stay the back gauge about 5mm, is convenient to follow-up hot-pressing, edge-sealing operation.
The rectangular channel that the bottom surface 112 of described battery core groove 11 and the connecting portion of two side elevations have arc-shaped transition.Adopt the arc-shaped transition design effectively to alleviate or to avoid this changeover portion in the problem of punching course Fracture.Described arc-shaped transition radius is 1 to 3mm, is preferably 2mm.
By the method that adopts battery battery core of the present invention to encapsulate, the space that holds battery of thickness 18 millimeter can be simply obtained, and traditional restriction on the thickness of two battery core grooves of punching press on the same aluminum plastic film monolithic can be avoided by four limit hot sealings.So just can realize easily jumbo lithium battery being encapsulated.In addition, because its mould does not need to make somewhat complex design, therefore reduced production cost.
Claims (9)
1. method that battery battery core is encapsulated, it may further comprise the steps: with the aluminum plastic film volume be cut to can hold an essence greater than or substantially equal the aluminum plastic film monolithic of a battery core groove of a battery core size to be packaged; This aluminum plastic film monolithic is carried out punching operation to stamp out this battery core groove; Thereby with battery core put into a slice first with one first battery core groove of the aluminum plastic film monolithic of battery core groove so that the part of battery core is contained in this first battery core groove, a slice second is covered this first with on the aluminum plastic film monolithic of battery core groove and so that the remainder that this second second battery core groove with the aluminum plastic film monolithic of battery core groove holds this battery core obtains a packaging body with the aluminum plastic film monolithic of battery core groove, this packaging body is carried out the hot-pressing, edge-sealing operation on four limits and obtains the semi-finished product battery core at one side extraction electrode, and this semi-finished product battery core is proceeded baking, fluid injection, change into, the secondary edge sealing, deburring, flanging, obtain the finished product battery behind the partial volume.
2. method according to claim 1 is characterized in that: this aluminum plastic film single-sheet thickness 0.05 to 0.50mm.
3. method according to claim 1 is characterized in that: also stamp out air bag on the aluminum plastic film monolithic; Change into and trimming process step between also comprise secondary encapsulation, extract the gas that produces in the formation process out.
4. method according to claim 1 is characterized in that: after the punching press of aluminum plastic film monolithic is complete, alignment and the hot-pressing, edge-sealing of cutting to be conducive to aluminum plastic film monolithic in the subsequent handling carried out on four limits with the aluminum plastic film monolithic of battery core groove.
5. method according to claim 1 is characterized in that: the degree of depth of the battery core groove that described punching press obtains is about 6 to 13mm, is preferably about 9mm.
6. method according to claim 1, it is characterized in that: the described battery core groove of going out is rectangular channel; The rectangular channel that described rectangular channel preferably has arc-shaped transition at the connecting portion of end face and two side elevations; Described arc-shaped transition radius is 3 to 12mm, is preferably 9mm.
7. method according to claim 1 is characterized in that: the rectangular channel that described battery core groove preferably has arc-shaped transition at the connecting portion of bottom surface and two side elevations; Described arc-shaped transition radius is 1 to 3mm, is preferably 2mm.
8. aluminum plastic film monolithic, it is characterized in that: this aluminum plastic film monolithic has a battery core groove, and this aluminum plastic film monolithic essence is greater than the size of this battery core groove.
9. right to use requires battery battery core that the aluminum plastic film monolithic in 8 makes and the packaging body of aluminum plastic film monolithic, it is characterized in that: comprise the first aluminum plastic film monolithic, the two the first aluminum plastic film monolithics; The battery core groove alignment relative of described the first aluminum plastic film monolithic, the two the first aluminum plastic film monolithics is to form battery space, and heat-sealing sealing around the accommodating battery battery core in the battery space, battery battery core is Yi Bian and arranging electrode.
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| CN2012105386254A CN103050645A (en) | 2012-12-13 | 2012-12-13 | Method for packaging battery cell, plastic-aluminum membrane single sheet, and packaging body of battery cell and plastic-aluminum membrane monolithic |
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| CN2012105386254A CN103050645A (en) | 2012-12-13 | 2012-12-13 | Method for packaging battery cell, plastic-aluminum membrane single sheet, and packaging body of battery cell and plastic-aluminum membrane monolithic |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105591160A (en) * | 2016-01-20 | 2016-05-18 | 山东精工电子科技有限公司 | Method for verifying package reliability of soft-package battery |
| CN106025145A (en) * | 2016-08-09 | 2016-10-12 | 连云港德立信电子科技有限公司 | Flexible package lithium battery two-seal liquor-drainage exhaust packaging technology |
| CN107394279A (en) * | 2017-07-28 | 2017-11-24 | 深圳市博澳能源技术开发有限公司 | The method for packing of monomer high capacity polymer lithium ion battery |
| CN108365136A (en) * | 2018-03-16 | 2018-08-03 | 长沙优力电驱动系统有限公司 | Battery core packaging cartridge, lithium battery and battery cell encapsulation method |
| CN108574060A (en) * | 2018-04-18 | 2018-09-25 | 四川绿鑫电源科技有限公司 | A kind of packaging method for polymer lithium ion battery electric core |
| CN110783615A (en) * | 2019-08-06 | 2020-02-11 | 松栢投资有限公司 | Manufacturing method of soft package button type lithium battery and soft package button type lithium battery |
| CN111313095A (en) * | 2019-05-06 | 2020-06-19 | 萍乡市清安锂硫科技有限公司 | Process for positioning and packaging top side seal of lithium ion soft package battery |
| CN113270604A (en) * | 2021-04-26 | 2021-08-17 | 广东利元亨智能装备股份有限公司 | Battery cell packaging method and battery cell packaging equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105591160A (en) * | 2016-01-20 | 2016-05-18 | 山东精工电子科技有限公司 | Method for verifying package reliability of soft-package battery |
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| CN108574060A (en) * | 2018-04-18 | 2018-09-25 | 四川绿鑫电源科技有限公司 | A kind of packaging method for polymer lithium ion battery electric core |
| CN111313095A (en) * | 2019-05-06 | 2020-06-19 | 萍乡市清安锂硫科技有限公司 | Process for positioning and packaging top side seal of lithium ion soft package battery |
| CN110783615A (en) * | 2019-08-06 | 2020-02-11 | 松栢投资有限公司 | Manufacturing method of soft package button type lithium battery and soft package button type lithium battery |
| CN110783615B (en) * | 2019-08-06 | 2023-05-02 | 松栢投资有限公司 | Method for manufacturing soft-pack button lithium battery and soft-pack button lithium battery |
| CN113270604A (en) * | 2021-04-26 | 2021-08-17 | 广东利元亨智能装备股份有限公司 | Battery cell packaging method and battery cell packaging equipment |
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Application publication date: 20130417 |