CN201946671U - Low-temperature heat sealing lug for lithium ion battery - Google Patents
Low-temperature heat sealing lug for lithium ion battery Download PDFInfo
- Publication number
- CN201946671U CN201946671U CN2011200453643U CN201120045364U CN201946671U CN 201946671 U CN201946671 U CN 201946671U CN 2011200453643 U CN2011200453643 U CN 2011200453643U CN 201120045364 U CN201120045364 U CN 201120045364U CN 201946671 U CN201946671 U CN 201946671U
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- Prior art keywords
- lug
- lithium ion
- ion battery
- low
- heat
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- Expired - Fee Related
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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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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a low-temperature heat sealing lug for a lithium ion battery and aims to provide the low-temperature heat sealing lug for the lithium ion battery, which can reduce a heat sealing temperature of the lithium ion battery, improve the safety performance of the lithium ion battery and improve the recycling rate of the lithium ion battery. The lug comprises a lug plate (1) and a hot melt adhesive membrane (2) is subjected to heat compression on the lug plate (1). The hot melt adhesive membrane (2) comprises an intermediate layer and two ethylene acrylic acid copolymer layers (21), wherein the intermediate layer is based on a polypropylene layer (20); and the two ethylene acrylic acid copolymer layers (21) are respectively positioned inside and outside the polypropylene layer (20). The low-temperature heat sealing lug can be widely applied to the field of lithium ion batteries.
Description
Technical field
The utility model relates to a kind of lithium battery low-temperature heat-sealing type lug.
Background technology
At present, the heat-sealing temperature of lug and lithium electricity flexible package aluminum plastic film with the temperature computation of hot knife on the heat sealing machine generally about 230 ℃, because the heat-sealing time ratio is shorter, general 1-3 seconds, when heat passes to lug glue, the heat-sealing temperature that temperature reaches lug glue could seal for about 180 ℃, the heat-sealing temperature height, the boiling point of the electrolyte of various models commonly used is about 90 ℃, the barrier film that lithium battery uses is the co-extrusion film of PE or PP and PE, the fusing point of barrier film is generally 100--130 ℃, during the lithium battery heat-sealing, because heat-sealing temperature height, damage barrier film easily and make lithium battery interior electrolyte too high near the temperature of heat-sealing place, increased unsafe factor, simultaneously, when occurring overcharging in the charging and discharging lithium battery process or put excessively, the electric current of battery is excessive, the temperature that causes lithium battery interior electrolyte that causes generating heat rises, and the boiling point of electrolyte is very low, when battery temperature is elevated to a certain degree, can make the electrolyte boiling of inside battery, produce pressure, rising pressure increase along with temperature, reach the weakness that certain degree breaks through aluminum plastic film self heat-sealing place or aluminum plastic film and lug heat-sealing place up to pressure, occur leaking, the heat seal strength of the lug/aluminum plastic film of the lithium battery that uses and the heat seal strength of aluminum plastic film/aluminum plastic film do not have significant difference at present, therefore, when occurring in the battery charge and discharge process overcharging or putting excessively, leakage point is uncertain, is heat-sealing place of lug/aluminum plastic film sometimes, is heat-sealing place of aluminum plastic film/aluminum plastic film sometimes, if heat-sealing place of aluminum plastic film/aluminum plastic film is leaked, so just destroyed the CPP hot sealing layer of aluminum plastic film itself, battery is just scrapped, if heat-sealing place of lug/aluminum plastic film is leaked, change lug, the battery of leakage can be reused after treatment.
In sum, the deficiencies in the prior art part is: the heat-sealing temperature height, damage that barrier film, fail safe are lower, leakage point is controlled not too easily easily.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of lithium battery low-temperature heat-sealing type lug that can reduce the recovery utilization rate of the heat-sealing temperature of lithium battery, the security performance that improves lithium battery, increase lithium battery is provided.
The technical scheme that the utility model adopted is: the utility model comprises lug sheet and the hot melt adhesive film of hot pressing on described lug sheet, and described hot melt adhesive film comprises intermediate layer based on polypropylene layer, lays respectively at the ethylene acrylic acid co polymer layer in the described polypropylene layer inboard and the outside.
The thickness of described polypropylene layer is the 20-60 micron, and the thickness of described ethylene acrylic acid co polymer layer is the 20-50 micron.
The beneficial effects of the utility model are: because the utility model comprises lug sheet and the hot melt adhesive film of hot pressing on described lug sheet; described hot melt adhesive film comprises the intermediate layer based on polypropylene layer; lay respectively at the ethylene acrylic acid co polymer layer in the described polypropylene layer inboard and the outside; adopt low-melting ethylene acrylic acid co polymer layer; can effectively reduce heat-sealing temperature; improve the security performance of lithium battery; simultaneously; described ethylene acrylic acid co polymer layer itself has excellent cementability; so it can keep the heat seal strength of lug glue and aluminum plastic film; and; in the charging and discharging lithium battery process; if protective device is malfunctioning; cause overcharging or cross and put; battery temperature raises; when battery temperature reaches the fusing point of EAA; electrolyte just seethes with excitement; inside battery has very little pressure; the part thawing of described ethylene acrylic acid co polymer layer this moment; pressure can be broken through heat-sealing place of lug and aluminum plastic film earlier; and heat-sealing place of aluminum plastic film and aluminum plastic film can not be broken; because the fusing point height of aluminum plastic film hot sealing layer; the battery drain point can be controlled at heat-sealing place of lug and aluminum plastic film like this; the battery that leaks is through after processing and changing lug; can also reuse; so the utility model can reduce the heat-sealing temperature of lithium battery; improve the security performance of lithium battery, increase the recovery utilization rate of lithium battery.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
The structural representation of Fig. 2 the utility model hot melt adhesive film.
Embodiment
As shown in Figure 1 and Figure 2, the utility model comprises lug sheet 1 and the hot melt adhesive film 2 of hot pressing on described lug sheet 1, described hot melt adhesive film 2 is positioned at the position that seals with aluminum plastic film on the described lug sheet 1, described hot melt adhesive film 2 comprises intermediate layer based on polypropylene layer 20, lays respectively at the ethylene acrylic acid co polymer layer 21 in described polypropylene layer 20 inboards and the outside, the thickness of described polypropylene layer 20 is the 20-60 micron, and the thickness of described ethylene acrylic acid co polymer layer 21 is the 20-50 micron.
Specify the utility model below by an example: select two layers of thickness to be 30 microns described ethylene acrylic acid co polymer layer 21, accompany thickness in the middle of it and be 40 microns described polypropylene layer 20, the co-extrusion film forming, lug sheet width is 5 millimeters, the hot pressing of co-extrusion film is incorporated on the lug sheet, make the finished product lug, this lug is packaged into battery, the temperature of regulating hot knife is 180 ℃, 2 seconds heat-sealing time, heat-sealing pressure is 0.3MPa, and the peel strength that records lug and aluminum plastic film is 80N/15mm.Do safety testing, when battery temperature rises to 92 ℃ when spending, lug and aluminum plastic film heat-sealing place are broken, and leakage takes place.Deng electrolyte leakage fully after, change lug, after the drying, refill electrolyte, heat-sealing, heat seal condition is 180 ℃ of hot knife temperature, 2 seconds heat-sealing time, heat-sealing pressure is 0.3MPa.The peel strength that records lug and aluminum plastic film is 78N/15mm.
The utility model can be widely used in the lithium battery field.
Claims (2)
1. a lithium battery is with low-temperature heat-sealing type lug, it is characterized in that: it comprises lug sheet (1) and the hot pressing hot melt adhesive film (2) on described lug sheet (1), and described hot melt adhesive film (2) comprises intermediate layer based on polypropylene layer (20), lay respectively at the ethylene acrylic acid co polymer layer (21) in the inboard and outside of described polypropylene layer (20).
2. a kind of lithium battery according to claim 1 low-temperature heat-sealing type lug, it is characterized in that: the thickness of described polypropylene layer (20) is the 20-60 micron, the thickness of described ethylene acrylic acid co polymer layer (21) is the 20-50 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200453643U CN201946671U (en) | 2011-02-23 | 2011-02-23 | Low-temperature heat sealing lug for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200453643U CN201946671U (en) | 2011-02-23 | 2011-02-23 | Low-temperature heat sealing lug for lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201946671U true CN201946671U (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200453643U Expired - Fee Related CN201946671U (en) | 2011-02-23 | 2011-02-23 | Low-temperature heat sealing lug for lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201946671U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529412A (en) * | 2016-01-06 | 2016-04-27 | 浙江汇同电源有限公司 | Novel storage battery |
| CN107785617A (en) * | 2017-11-02 | 2018-03-09 | 上海紫江新材料科技有限公司 | A kind of low temperature tab and preparation method thereof |
| CN109716560A (en) * | 2017-05-12 | 2019-05-03 | 株式会社Lg化学 | Secondary cell and the method for manufacturing the secondary cell |
| CN114552138A (en) * | 2021-09-23 | 2022-05-27 | 万向一二三股份公司 | High-reliability soft package battery tab and preparation method thereof |
| WO2023130905A1 (en) * | 2022-01-10 | 2023-07-13 | 珠海冠宇电池股份有限公司 | Tab and battery comprising tab |
| CN116565478A (en) * | 2023-06-29 | 2023-08-08 | 昆山致信天城电子材料有限公司 | Lithium battery tab adhesive film capable of being opened at low temperature, preparation method and lithium battery |
-
2011
- 2011-02-23 CN CN2011200453643U patent/CN201946671U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529412A (en) * | 2016-01-06 | 2016-04-27 | 浙江汇同电源有限公司 | Novel storage battery |
| CN105529412B (en) * | 2016-01-06 | 2019-03-08 | 浙江汇同电源有限公司 | Battery |
| CN109716560A (en) * | 2017-05-12 | 2019-05-03 | 株式会社Lg化学 | Secondary cell and the method for manufacturing the secondary cell |
| CN109716560B (en) * | 2017-05-12 | 2021-08-10 | 株式会社Lg化学 | Secondary battery and method of manufacturing the same |
| CN107785617A (en) * | 2017-11-02 | 2018-03-09 | 上海紫江新材料科技有限公司 | A kind of low temperature tab and preparation method thereof |
| CN114552138A (en) * | 2021-09-23 | 2022-05-27 | 万向一二三股份公司 | High-reliability soft package battery tab and preparation method thereof |
| WO2023130905A1 (en) * | 2022-01-10 | 2023-07-13 | 珠海冠宇电池股份有限公司 | Tab and battery comprising tab |
| CN116565478A (en) * | 2023-06-29 | 2023-08-08 | 昆山致信天城电子材料有限公司 | Lithium battery tab adhesive film capable of being opened at low temperature, preparation method and lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20150223 |
|
| EXPY | Termination of patent right or utility model |