CN203026604U - Cell structure of soft-package lithium battery - Google Patents
Cell structure of soft-package lithium battery Download PDFInfo
- Publication number
- CN203026604U CN203026604U CN2012205664306U CN201220566430U CN203026604U CN 203026604 U CN203026604 U CN 203026604U CN 2012205664306 U CN2012205664306 U CN 2012205664306U CN 201220566430 U CN201220566430 U CN 201220566430U CN 203026604 U CN203026604 U CN 203026604U
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- Prior art keywords
- current collector
- lithium battery
- package lithium
- copper foil
- cell
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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 utility model discloses a cell structure of a soft-package lithium battery. The cell structure comprises a negative plate, a diaphragm and a positive plate, wherein tabs are arranged on the positive plate and the negative plate; the negative plate comprises a current collector copper foil, and a negative active substance, a binder and conductive carbon powder coated on the current collector copper foil; the positive plate comprises a current collector aluminum foil, and a positive active substance, a binder and conductive carbon powder coated on the current collector aluminum foil; and the negative plate, the diaphragm and the positive plate are orderly overlapped and curled to form a primary cell. The cell structure of the soft-package lithium battery provided by the utility model is characterized in that the current collector copper foil, the diaphragm and the current collector aluminum foil are orderly wound around the outer layer of the existing primary cell, so that when the individual cell is pierced, huge heat generated instantaneously inside the individual cell is quickly transferred along the current collector copper foil and the current collector aluminum foil at the outer layer, so that fire or explosion caused by local high temperature inside the cell is prevented and the effect of quick heat dissipation when the cell is pierced is achieved; and as a result, the puncture safety performance of the lithium-ion battery is improved; and besides, the cell structure of the soft-package lithium battery is simple in structure, easy to realize and low in cost.
Description
Technical field
The utility model belongs to technical field of lithium ion, specifically, relates to a kind of core strueture of soft package lithium battery.
Background technology
At present, in all kinds lithium battery, flexible package lithium cell uses in various digital electronic goods widely with high-energy, the advantage such as lightweight, form is made by oneself.
Flexible packing lithium ion battery comprises plastic-aluminum shell and battery core, the battery core of present lithium ion soft-package battery, and the mode of adopt reeling also is provided with lug with positive/negative plate and diaphragm paper winding shaping on pole piece, and conventional coiling battery core is generally all by the empty paper tinsel of positive pole district ending.
After battery completed, battery was in the process of using, and unavoidable appearance is collided and the spurt phenomenon.And battery pack is in the situation that punctured, and conventional batteries can produce on fire, explosion phenomenon usually, and safety problem is seriously influenced.Battery core is in the process of acupuncture, there are 4 kinds of short-circuit modes battery core inside, it is short circuit between positive active material and negative electrode active material, short circuit between positive active material and negative current collector, short circuit between plus plate current-collecting body and negative electrode active material, short circuit between plus plate current-collecting body and negative current collector, wherein holding most ignitable is short circuit between plus plate current-collecting body and negative electrode active material.
Summary of the invention
The utility model has overcome shortcoming of the prior art, and a kind of core strueture of soft package lithium battery is provided, and it has in the situation that pierced through, and can not produce phenomenon on fire, blast, has the higher-security energy, and lower-cost characteristics.
The utility model is achieved through the following technical solutions:
A kind of core strueture of soft package lithium battery, comprise negative plate, barrier film and positive plate, be equipped with lug on positive plate and negative plate, negative plate comprises copper foil of affluxion body and is coated with negative electrode active material, bonding agent and conductive carbon powder on it, and positive plate comprises the collector aluminium foil and is coated with positive active material, bonding agent and conductive carbon powder on it; Negative plate, barrier film and positive plate are stacked and reel to form elementary battery core successively, are wound with successively from the inside to the outside copper foil of affluxion body, barrier film and collector aluminium foil at the outermost layer of elementary battery core, form secondary battery core.
Further, the outermost layer of elementary battery core is wound with the two-layer copper foil of affluxion body that is arranged in order, barrier film and collector aluminium foil.
Further, secondary battery core finishes up with copper foil of affluxion body.
Further, lug is provided with tab.
Further, the lug gap digit between the edge of tab and positive plate and negative plate is provided with the insulating tape that coats lug.
Further, insulating tape is identical with the tab material.
Compared with prior art, the beneficial effects of the utility model are:
The core strueture of a kind of soft package lithium battery described in the utility model, by reel successively at existing elementary battery core skin copper foil of affluxion body, barrier film and collector aluminium foil, make single battery core when being subject to acupuncture, the huge heat of the inner moment generation of battery core prolongs outer copper foil of affluxion body and collector aluminium foil fast transfer, on fire or the blast that has prevented the inner localized hyperthermia of battery core and caused, reach the effect of battery core when puncture quick heat radiating, thereby can improve the security performance that punctures of lithium ion battery; The utility model is simple in structure in addition, easily realizes, cost is lower.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, is used from explanation the utility model with embodiment one of the present utility model, does not consist of to restriction of the present utility model, in the accompanying drawings:
Fig. 1 is the structural representation of the core strueture of a kind of soft package lithium battery described in the utility model;
Fig. 2 is the structural representation of negative plate, lug, tab and the insulating tape of the core strueture of a kind of soft package lithium battery described in the utility model.
Wherein, include:
1---positive plate,
2---negative plate,
3---copper foil of affluxion body,
4---the collector aluminium foil,
5---barrier film,
6---elementary battery core,
7---secondary battery core,
8---lug,
9---tab,
10---insulating tape.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the core strueture of a kind of soft package lithium battery described in the utility model, comprise negative plate 2, barrier film 5 and positive plate 1, be equipped with lug 8 on positive plate 1 and negative plate 2, negative plate 2 comprises copper foil of affluxion body 3 and is coated with negative electrode active material, bonding agent and conductive carbon powder on it, and positive plate 1 comprises collector aluminium foil 4 and is coated with positive active material, bonding agent and conductive carbon powder on it; Negative plate 2, barrier film 5 and positive plate 1 are stacked and reel to form elementary battery core 6 successively, are wound with successively from the inside to the outside copper foil of affluxion body 3, barrier film 5 and collector aluminium foil 4 at the outermost layer of elementary battery core 6, form secondary battery core 7.
Battery core makes preferential short circuit between copper foil of affluxion body 3 and collector aluminium foil 4 when acupuncture, produce the heat less this moment, and on fire, blast that battery core can not occur easily by lancing test, has higher security performance.
The outermost layer of elementary battery core 6 is wound with the two-layer copper foil of affluxion body that is arranged in order 3, barrier film 5 and collector aluminium foil 4.Copper foil of affluxion body 3 and the preferential short circuit of collector aluminium foil 4 when guaranteeing better that battery core is subject to acupuncture.
Secondary battery core 7 is with copper foil of affluxion body 3 endings.Utilize the good heat conductivility of Copper Foil, be convenient to heat radiation.
As shown in Figure 2, lug 8 is provided with tab 9.Lug 8 gap digits between the edge of tab 9 and positive plate 1 and negative plate 2 are provided with the insulating tape 10 that coats lug 8.
Negative electrode active material, bonding agent and conductive carbon powder are defined as conductive carbon powder negative electrode active layer.
Positive active material, bonding agent and conductive carbon powder are defined as the anodal active layer of conductive carbon powder.
It should be noted that at last: these are only preferred embodiment of the present utility model; be not limited to the utility model; although with reference to embodiment, the utility model is had been described in detail; for a person skilled in the art; it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing; perhaps part technical characterictic wherein is equal to replacement; but all within spirit of the present utility model and principle; any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. the core strueture of a soft package lithium battery, comprise negative plate, barrier film and positive plate, be equipped with lug on described positive plate and negative plate, described negative plate comprises copper foil of affluxion body and is coated with conductive carbon powder negative electrode active layer on it, and described positive plate comprises the collector aluminium foil and is coated with the anodal active layer of conductive carbon powder on it; Described negative plate, barrier film and positive plate be the stacked and elementary battery core of formation of reeling successively, and it is characterized in that: the outermost layer in described elementary battery core is wound with described copper foil of affluxion body, barrier film and collector aluminium foil from the inside to the outside successively, forms secondary battery core.
2. the core strueture of a kind of soft package lithium battery according to claim 1, it is characterized in that: the outermost layer of described elementary battery core is wound with the two-layer described copper foil of affluxion body that is arranged in order, barrier film and collector aluminium foil.
3. the core strueture of a kind of soft package lithium battery according to claim 1, it is characterized in that: described secondary battery core finishes up with described copper foil of affluxion body.
4. the core strueture of a kind of soft package lithium battery according to claim 1, it is characterized in that: described lug is provided with tab.
5. the core strueture of a kind of soft package lithium battery according to claim 4 is characterized in that: the lug gap digit between the edge of described tab and described positive plate and negative plate is provided with the insulating tape that coats described lug.
6. the core strueture of a kind of soft package lithium battery according to claim 5, it is characterized in that: described insulating tape is identical with described tab material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205664306U CN203026604U (en) | 2012-10-31 | 2012-10-31 | Cell structure of soft-package lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205664306U CN203026604U (en) | 2012-10-31 | 2012-10-31 | Cell structure of soft-package lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026604U true CN203026604U (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205664306U Expired - Fee Related CN203026604U (en) | 2012-10-31 | 2012-10-31 | Cell structure of soft-package lithium battery |
Country Status (1)
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|---|---|
| CN (1) | CN203026604U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825053A (en) * | 2014-03-17 | 2014-05-28 | 山东润峰集团新能源科技有限公司 | Manufacturing process of high-performance flexible package lithium ion battery cell |
| CN105355956A (en) * | 2015-10-16 | 2016-02-24 | 广东烛光新能源科技有限公司 | Electrochemical cell and preparation method thereof |
| CN106469832A (en) * | 2015-08-19 | 2017-03-01 | 中信国安盟固利动力科技有限公司 | A kind of safeguard construction of lithium ion battery |
| CN107728068A (en) * | 2017-09-24 | 2018-02-23 | 合肥国轩高科动力能源有限公司 | A kind of short-circuit resistance method of testing |
| CN108539061A (en) * | 2017-03-06 | 2018-09-14 | 湖南妙盛汽车电源有限公司 | A kind of soft-package battery |
| CN108539100A (en) * | 2017-03-06 | 2018-09-14 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| CN110994036A (en) * | 2019-12-24 | 2020-04-10 | 辽宁九夷锂能股份有限公司 | Prevent acupuncture cylinder type lithium cell |
| CN113497268A (en) * | 2020-03-18 | 2021-10-12 | 荣盛盟固利新能源科技有限公司 | Soft-packaged battery core structure, soft-packaged battery and electrochemical device |
-
2012
- 2012-10-31 CN CN2012205664306U patent/CN203026604U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825053A (en) * | 2014-03-17 | 2014-05-28 | 山东润峰集团新能源科技有限公司 | Manufacturing process of high-performance flexible package lithium ion battery cell |
| CN103825053B (en) * | 2014-03-17 | 2015-12-09 | 山东润峰集团新能源科技有限公司 | Manufacturing process of high-performance flexible package lithium ion battery cell |
| CN106469832A (en) * | 2015-08-19 | 2017-03-01 | 中信国安盟固利动力科技有限公司 | A kind of safeguard construction of lithium ion battery |
| CN105355956A (en) * | 2015-10-16 | 2016-02-24 | 广东烛光新能源科技有限公司 | Electrochemical cell and preparation method thereof |
| CN105355956B (en) * | 2015-10-16 | 2018-01-19 | 广东烛光新能源科技有限公司 | Electrochemical cell and preparation method thereof |
| CN108539061A (en) * | 2017-03-06 | 2018-09-14 | 湖南妙盛汽车电源有限公司 | A kind of soft-package battery |
| CN108539100A (en) * | 2017-03-06 | 2018-09-14 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| CN107728068A (en) * | 2017-09-24 | 2018-02-23 | 合肥国轩高科动力能源有限公司 | A kind of short-circuit resistance method of testing |
| CN110994036A (en) * | 2019-12-24 | 2020-04-10 | 辽宁九夷锂能股份有限公司 | Prevent acupuncture cylinder type lithium cell |
| CN113497268A (en) * | 2020-03-18 | 2021-10-12 | 荣盛盟固利新能源科技有限公司 | Soft-packaged battery core structure, soft-packaged battery and electrochemical device |
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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: 20130626 Termination date: 20191031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |