CN213212232U - Edge sealing structure of battery - Google Patents
Edge sealing structure of battery Download PDFInfo
- Publication number
- CN213212232U CN213212232U CN202022429278.4U CN202022429278U CN213212232U CN 213212232 U CN213212232 U CN 213212232U CN 202022429278 U CN202022429278 U CN 202022429278U CN 213212232 U CN213212232 U CN 213212232U
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- CN
- China
- Prior art keywords
- battery
- packaging films
- edge
- edges
- folded
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- 238000007789 sealing Methods 0.000 title claims description 30
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000012785 packaging film Substances 0.000 claims description 61
- 229920006280 packaging film Polymers 0.000 claims description 61
- 239000003292 glue Substances 0.000 claims description 14
- 239000010410 layer Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000002344 surface layer Substances 0.000 claims description 10
- 229920006255 plastic film Polymers 0.000 claims description 9
- 239000002985 plastic film Substances 0.000 claims description 9
- 239000012793 heat-sealing layer Substances 0.000 claims description 7
- 238000002161 passivation Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims 1
- 238000005538 encapsulation Methods 0.000 abstract description 15
- 239000012528 membrane Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000004411 aluminium Substances 0.000 abstract description 4
- 238000003475 lamination Methods 0.000 abstract description 4
- 238000010073 coating (rubber) Methods 0.000 abstract description 3
- 230000004308 accommodation Effects 0.000 abstract 3
- 239000004568 cement Substances 0.000 abstract 1
- 230000007306 turnover Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model is suitable for a battery banding technical field provides a banding structure of battery, including two encapsulation membrane and electric core, two encapsulation membrane edge butt joints with form the accommodation space between two encapsulation membranes, electric core include utmost point core and by utmost point ear that the utmost point core was drawn forth, utmost point core holding in the accommodation space, utmost point ear is followed wear out between the topside of two encapsulation membranes the accommodation space, utmost point ear with be equipped with the insulating cement between the encapsulation membrane, the topside of encapsulation membrane to the inboard of encapsulation membrane turn over a book and laminate in the inboard of encapsulation membrane forms hem in the top. The utility model provides a pair of banding structure of battery through with the topside infolding, has avoided the outward aluminium lamination of leaking of plastic-aluminum membrane to lead to corroding or the risk of short circuit, need not to locate the rubber coating or paste insulating paper at top banding, under the prerequisite that does not increase new materials, has improved insulating reliability to improve the security performance of battery, and production efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of the battery banding, especially, relate to a banding structure of battery.
Background
In the prior art, after the finished battery is manufactured, a tab or a nickel strap is connected to the top of the battery, which is easy to cause short circuit. In the prior art, the top edge sealing part is generally coated with glue or pasted with a layer of insulating paper to realize the effect of isolation protection, materials such as novel glue or insulating paper and the like need to be additionally developed under the condition, the development period is prolonged, the factor of process variation is improved, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a banding structure of battery, its insulating reliability is good, production efficiency is high, need not to develop materials such as novel glue or insulating paper in addition.
The technical scheme of the utility model is that: the edge sealing structure of the battery comprises two packaging films and an electric core, wherein the edges of the two packaging films are butted to form an accommodating space between the two packaging films, the electric core comprises a pole core and a pole lug led out by the pole core, the pole core is accommodated in the accommodating space, the pole lug penetrates out of the accommodating space from the top edges of the two packaging films, insulating glue is arranged between the pole lug and the packaging films, and the top edges of the packaging films are folded towards the inner sides of the packaging films and are attached to the inner sides of the packaging films to form top inner folded edges.
Optionally, the parts of the top inner folding edges of the two packaging films, which are opposite to the tabs, are bonded to the insulating glue; and/or the opposite parts of the lugs on the inner surface of the packaging film are bonded to the insulating glue.
Optionally, the bottom edges of the two packaging films are integrally connected, and a folding line is arranged between the bottom edges of the two packaging films.
Optionally, the packaging film comprises an outer surface layer, a metal layer and a heat sealing layer, wherein the outer surface layer is located on the outer surface of the packaging film, and the metal layer is located between the outer surface layer and the heat sealing layer.
Optionally, the packaging film is an aluminum-plastic film, and the aluminum material at the notch of the aluminum-plastic film is provided with a passivation layer.
Optionally, the top inner flap has a flap dimension of 0.3 to 1.8 mm.
Optionally, the top inner flap has a flap dimension of 0.5 to 1.0 mm.
Optionally, the inner surface of the packaging film is connected with the two side edges in a hot-pressing sealing mode.
Optionally, two side edges of the packaging film are provided with side inner folded edges which are folded inwards, and the side inner folded edges of the two packaging films are connected in an involutory manner.
Optionally, a cut groove for preventing the top inner folded edge and the side inner folded edge from being folded inwards at the same time to be stacked is arranged at the joint of the top inner folded edge and the side inner folded edge.
The utility model provides a pair of banding structure of battery through with the topside infolding, has avoided the outward aluminium lamination of leaking of plastic-aluminum membrane to lead to corroding or the risk of short circuit, need not to locate the rubber coating or paste insulating paper at top banding, under the prerequisite that does not increase new materials, has improved insulating reliability to improve the security performance of battery, and production efficiency is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of a sealing edge structure of a battery according to an embodiment of the present invention;
fig. 2 is a side sectional view of an edge sealing structure of a battery according to an embodiment of the present invention;
fig. 3 is a side cross-sectional view of one of the packaging films in the edge sealing structure of the battery according to an embodiment of the present invention;
fig. 4 is a schematic plan view of a sealing edge structure of a battery according to an embodiment of the present invention;
fig. 5 is a schematic plan view of an encapsulation film in an edge sealing structure of a battery according to an embodiment of the present invention;
fig. 6 is a schematic plan view of an edge sealing structure of a battery according to an embodiment of the present invention after an electric core is installed in an encapsulating film.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
As shown in fig. 1 to 4, an embodiment of the present invention provides an edge sealing structure for a battery, including two packaging films 11 and an electric core, where the edges of the two packaging films 11 are butted to form an accommodating space 102 between the two packaging films 11, the electric core includes a pole core 20 and a pole tab 21 led out from the pole core 20, the pole core 20 is accommodated in the accommodating space 102, the pole tab 21 passes through the accommodating space 102 from between the top edges of the two packaging films 11, an insulating glue 23 is disposed between the pole tab 21 and the packaging films 11, the top edges of the packaging films 11 are folded toward the inside of the packaging films 11 and are attached to the inside of the packaging films 11 to form a top inner folded edge 101, and the inner surfaces of the two packaging films 11 can be connected by heat sealing (heat sealing is to bond two same or different materials by high temperature and pressure, so as to achieve the purpose of sealing), encapsulation film 11 generally accompanies the metal level, through with the topside infolding, has avoided the short circuit risk, like this, need not to seal the glue coating or paste insulating paper in top department, under the prerequisite that does not increase new materials, solves the risk that the metal level leads to that leaks outward in battery top department of sealing, has improved insulating reliability to improve the security performance of battery. And the appearance main body of the finished battery is basically consistent with that of the primary battery, so that the actual measurement, assembly, use and the like of the battery cannot be influenced subsequently.
Specifically, the portions of the top inner folded edges 101 of the two packaging films 11, which are opposite to the tabs 21, are bonded to the insulating glue 23, so that the reliability of insulation is further improved.
Specifically, the portion of the inner surface of the encapsulation film 11 opposite to the tab 21 is bonded to the insulating paste 23, which is advantageous for further improving the sealing reliability.
Specifically, the bottom edges of the two packaging films 11 are integrally connected, a folding line is arranged between the bottom edges of the two packaging films 11, the top inner folding line 101 is arranged at the top edge of each of the two packaging films 11, the two packaging films 11 are folded in half through the folding line to form the packaging shell 10, the structure is simple and reliable, the production efficiency is improved, and in other embodiments, the two packaging films 11 can also adopt independent structures.
Specifically, the packaging film 11 includes an outer surface layer, a metal layer and a heat sealing layer, the outer surface layer is located on the outer surface of the packaging film 11, the heat sealing layer is located on the inner surface of the packaging film 11, and the metal layer is located between the outer surface layer and the heat sealing layer. The extexine can be provided with wear-resistant material (be used for preventing the battery fish tail) etc. according to actual need, and inside the main effect of metal level was for preventing outside air and moisture from entering into the battery, the heat-seal layer can be used to carry out the heat-seal and connect, and the metal level can be the aluminium lamination.
Specifically, the encapsulation film 11 may be an aluminum-plastic film, and the aluminum material at the notch of the aluminum-plastic film may have a passivation layer, that is, the aluminum material at the notch of the aluminum-plastic film may be passivated, so as to further improve the reliability of the insulation.
Specifically, the insulation paste 23 disposed on the side surface of the tab 21 may be white paste.
In a specific application, the folded edge size of the top inner folded edge 101 may be 0.3 to 1.8mm, that is, the folded edge size of the top inner folded edge 101 is 0.3 to 1.8 mm. In this embodiment, the folding size of the top inner folding edge 101 is 0.5 to 1.0mm, so that the inner folding process is easy to implement, and meanwhile, a sufficient heat sealing area is ensured between the two packaging films 11.
Specifically, the inner surface of the encapsulation film 11 near the two sides is connected by thermocompression, that is, the inner surface of the encapsulation film 11 around the cavity 102 can be connected by thermocompression.
In a specific application, two side edges of the packaging film 11 may be provided with side inner folded edges (not shown in the drawings) folded inwards, and the side inner folded edges of the two packaging films 11 are connected in an involution manner, that is, the side edges and the top edges adopt the same structure, so that the insulation reliability is improved by folding inwards. Specifically, a cut groove for preventing the top inner fold 101 and the side inner fold from being folded inwards at the same time to be stacked is formed at the joint of the top inner fold 101 and the side inner fold. The notch groove can be located two angles departments at encapsulation film 11 top, and the notch groove can be the right angle shape, like this, hem 101 in the top with mutual noninterference when the hem inwards buckles in the lateral part, and the seamless laminating of department of meeting, the reliability is better.
In specific application, as shown in fig. 5, after the packaging film 11 (aluminum plastic film) is cut, the packaging film can be punched to form a cavity 102 for placing the battery core, and meanwhile, the notch at the top of the packaging film 11 (aluminum plastic film) is bent, the notch is folded inwards by 180 degrees, and if the size of the folded edge is too small, the folded edge is not easy to bend and is easy to rebound; if the folded edge is bent too much, the CPP layer bonded with the insulating layer (white glue) is too few to ensure the sealing effect, the surface layer and the white glue are poor in bonding effect, not durable, easy to separate, and incapable of ensuring the sealing effect, as shown in fig. 6, after the folded edge of the packaging film 11 is shaped, a battery core of a corresponding type is placed in the cavity 102, the folded edge is prevented from being operated after the pole core 20 is placed, and the assembling process is simple and easy.
After the pole piece 20 is placed, the battery can be integrally assembled, i.e., heat sealed. Because the plastic-aluminum membrane is behind the hem, its hem department is relatively thicker, higher, can carry out purpose-built to the pressure head that is used for the hot pressing to seal, set up corresponding stair structure promptly on the pressure head, can guarantee like this that hem department can perfectly laminate the heat-seal pressure head with non-hem department, the heat-seal reliability is good. In this embodiment, the size of the folded edge can be controlled to be about 0.5-1.0mm, as shown in the side cross-sectional view of fig. 2, which can ensure the design purpose and does not affect the energy volume density of the battery. After the top inner flange 101 is bent and the battery is packaged, the schematic view of the main body of the battery is shown in fig. 4, and the hatched area is the folded sealing edge overlapping area.
The embodiment of the utility model provides a banding structure of battery through with the topside infolding, has avoided the outward aluminium lamination that leaks of plastic-aluminum membrane to lead to corroding or the risk of short circuit, need not at top banding department rubber coating or paste insulating paper, under the prerequisite that does not increase new materials, has improved insulating reliability to improve the security performance of battery.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. The edge sealing structure of the battery is characterized by comprising two packaging films and an electric core, wherein the edges of the two packaging films are in butt joint to form an accommodating space between the two packaging films, the electric core comprises a pole core and a pole lug led out by the pole core, the pole core is accommodated in the accommodating space, the pole lug penetrates out of the accommodating space from the top edges of the two packaging films, insulating glue is arranged between the pole lug and the packaging films, and the top edges of the packaging films are folded towards the inner sides of the packaging films and are attached to the inner sides of the packaging films to form top inner folded edges.
2. The edge sealing structure for a battery according to claim 1, wherein the portions of the top inner folded edges of the two packaging films opposite to the tabs are bonded to the insulating glue; and/or the opposite parts of the lugs on the inner surface of the packaging film are bonded to the insulating glue.
3. The edge sealing structure for a battery according to claim 1, wherein the bottom edges of the two packaging films are integrally connected, and a folding line is disposed between the bottom edges of the two packaging films.
4. The edge sealing structure for a battery according to claim 1, wherein the sealing film comprises an outer surface layer, a metal layer and a heat sealing layer, the outer surface layer is disposed on the outer surface of the sealing film, and the metal layer is disposed between the outer surface layer and the heat sealing layer.
5. The edge banding structure of claim 1, wherein said packaging film is an aluminum plastic film, and said aluminum material at the notch of said aluminum plastic film has a passivation layer.
6. The edge banding structure for a battery as claimed in any one of claims 1 to 5, wherein the inside edge of said top inner flange has a flange size of 0.3 to 1.8 mm.
7. The edge banding structure for a battery as claimed in any one of claims 1 to 5, wherein the folded edge dimension of said top inner folded edge is 0.5 to 1.0 mm.
8. The edge sealing structure of any one of claims 1 to 5, wherein the inner surface of the packaging film is connected to the two sides of the packaging film by heat-pressing and sealing.
9. The edge sealing structure for a battery according to any one of claims 1 to 5, wherein two side edges of the packaging film are provided with side inner folded edges folded inwards, and the side inner folded edges of the two packaging films are folded together.
10. The edge banding structure for a battery as claimed in claim 9, wherein a notch groove for preventing both of said top inner flange and said side inner flange from being folded inward at the same time to be stacked is provided at the junction of said top inner flange and said side inner flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022429278.4U CN213212232U (en) | 2020-10-27 | 2020-10-27 | Edge sealing structure of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022429278.4U CN213212232U (en) | 2020-10-27 | 2020-10-27 | Edge sealing structure of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213212232U true CN213212232U (en) | 2021-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022429278.4U Active CN213212232U (en) | 2020-10-27 | 2020-10-27 | Edge sealing structure of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213212232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588668A (en) * | 2021-09-01 | 2021-11-02 | 广东奥普特科技股份有限公司 | Lug metal leakage detection method and system based on machine vision |
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2020
- 2020-10-27 CN CN202022429278.4U patent/CN213212232U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588668A (en) * | 2021-09-01 | 2021-11-02 | 广东奥普特科技股份有限公司 | Lug metal leakage detection method and system based on machine vision |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231220 Address after: No. 3009, BYD Road, Pingshan District, Shenzhen, Guangdong 518118 Patentee after: BYD Co.,Ltd. Address before: No. 3009, BYD Road, Pingshan District, Shenzhen, Guangdong 518118 Patentee before: BYD Co.,Ltd. Patentee before: Shanghai Fudi Industrial Co.,Ltd. |
|
| TR01 | Transfer of patent right |