CN104425844A - Method for improving safety of power battery by isolation type inflame-retardant liquid - Google Patents
Method for improving safety of power battery by isolation type inflame-retardant liquid Download PDFInfo
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- CN104425844A CN104425844A CN201310406588.6A CN201310406588A CN104425844A CN 104425844 A CN104425844 A CN 104425844A CN 201310406588 A CN201310406588 A CN 201310406588A CN 104425844 A CN104425844 A CN 104425844A
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- cell
- flame retardant
- retardant
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- fail safe
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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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
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of lithium ion power batteries, and particularly relates to a method for improving the safety of a power battery by an isolation type flame-retardant liquid. The power battery is formed by assembling a plurality of battery cells with a laminated structure, wherein each battery cell is prepared by wrapping a laminated cell by an aluminum-plastic film, in a process of wrapping the laminated cell by the aluminum-plastic film, a flame-retardant bag formed by wrapping a liquid flame retardant by adopting a wrapping film in a sealing manner is arranged between the aluminum-plastic film and the laminated cell in a filling way. According to the method, the flame retardant is isolated from an electrolyte, so that the flame retardant is relatively independent from the electrolyte and no mutual influence is caused, so that the influence of the flame retardant to the electrolyte is avoided, and the negative influence of the addition of the flame retardant to the performance of the power battery is reduced. Meanwhile, because the flame retardant is isolated from the electrolyte, the electrochemical performance of the flame retardant can not be considered, and the selection range and the consumption interval of the flame retardant are enlarged.
Description
Technical field
The present invention relates to lithium-ion-power cell technical field, be specifically related to a kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid.
Background technology
Lithium-ion-power cell is the novel high-energy battery succeeded in developing in 20th century.It is high that lithium-ion-power cell has voltage, and energy density is large, good cycle, the advantages such as self discharge is little, memory-less effect, and operating temperature range is wide.The structure of general lithium-ion-power cell is: with laminar, by positive plate, barrier film, negative plate are alternate and the battery core (or making battery core with coiling form) that formed, then connect outside terminal, put into duricrust (such as moulding shell, box hat, aluminum hull) or aluminum plastic film, inject electrolyte.The security performance of lithium ion is all weigh the most important standard of battery usually, the current usual method improving lithium-ion-power cell is all directly flame-retardant additive is injected electrolyte to mix with electrolyte, due to adding of flame-retardant additive, its chemical property creates direct negative effect to battery performance, reduce the performance of battery to a certain extent, therefore, use the kind of flame-retardant additive, consumption is all very limited.Current flame-retardant additive adds 5% and namely all produces obvious side effect to the serviceability of battery, and in manganese base battery, even if flame retardant agent content is about 10%, still cannot play obvious fire-retardant left and right.
Summary of the invention
The object of the invention is to overcome current lithium-ion-power cell due to what adopt is directly flame-retardant additive is added in electrolyte to the problem affecting electrokinetic cell performance mixing with it and bring, and provides a kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid.
In order to reach foregoing invention object, the present invention by the following technical solutions:
A kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid, described electrokinetic cell adopts the cell of laminated construction to assemble by several, cell is prepared from by the coated laminated cell of aluminum plastic film, in the process of the coated laminated cell of aluminum plastic film, between aluminum plastic film and laminated cell, fill the fire retardant bag adopting coating film to seal coated liquid flame retardant.The present invention by fire retardant and electrolyte are isolated, make fire retardant and electrolyte relatively independent, be independent of each other, thus avoid the impact of fire retardant on electrolyte, decrease the interpolation of fire retardant to the negative effect of electrokinetic cell performance.Meanwhile, owing to fire retardant and electrolyte being isolated, thus the chemical property of fire retardant can be considered, expand the range of choice of fire retardant, and consumption is interval.When battery generation security incident, be coated with the fire retardant bags burst of liquid flame retardant, fire retardant overflows, thus serves fire retardation.The method of raising electrokinetic cell of the present invention fail safe, not only reaches flame retardant effect, also avoid the impact of fire retardant on battery performance, kills two birds with one stone.
As preferably, described coating film is aluminum-plastic composite membrane, and its fracture strength 40-70N, elongation at break is 5%-20%.Whether liquid flame retardant can play the key of its fire resistance effectively, whether fire retardant bag in time can break when being subject to external force fire retardant is mixed with electrolyte, therefore the coating film of coated liquid flame retardant should have the physical properties such as suitable strength character, and in order to ensure this feature, the physical property of coating film is limited.
As preferably, the thickness of described coating film is 80-120 μm.The thickness of coating film also creates direct impact to breaking of fire retardant bag, therefore for
As preferably, described liquid flame retardant is carbon tetrachloride liquid.After carbon tetrachloride mixes with electrolyte, first promote the internal resistance of cell, reduce chemical property, play fire retardation simultaneously.
As preferably, the vacuum degree in described cell is 99kpa.At the cell of this vacuum degree, there is good shock resistance, the security performance of cell can be made better.
As preferably, the quantity of fire retardant bag is one, and its shape and monomer battery structure match.When fire retardant bag quantity is one, the external injury all to cell all can focus in same protection system, no matter make cell where there occurs security incident, all can trigger whole fire retardants with reply.
As preferably, in fire retardant bag, the weight of liquid flame retardant is the 5-20% of cell electrolyte inside weight.
Compared with prior art, beneficial effect is in the present invention: 1 has discharged traditional power battery adds fire retardant to the impact of battery performance, and 2 reach good flame retardant effect, embody good security performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1 cell, 2 aluminum plastic films, 3 laminated cells, 4 fire retardant bags, 5 coating films, 6 liquid flame retardants.
Embodiment
Below by specific embodiment, explanation is further described to technical scheme of the present invention.
If without specified otherwise, the raw material adopted in embodiments of the invention is the conventional raw material in this area, and the method adopted in embodiment, is the conventional method of this area.
Embodiment 1:
A kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid, electrokinetic cell adopts the cell 1 of laminated construction to assemble by several, cell 1 is prepared from by the coated laminated cell 3 of aluminum plastic film 2, in the process of the coated laminated cell 3 of aluminum plastic film 2, between aluminum plastic film 2 and laminated cell 3, fill a fire retardant bag 4 adopting coating film 5 to seal coated liquid flame retardant 6.Coating film 5 is aluminum-plastic composite membrane, and its fracture strength 40N, elongation at break is 10%, and thickness is 120 μm.Liquid flame retardant 6 is carbon tetrachloride liquid, and weight is 5% of cell 1 electrolyte inside weight.Vacuum degree in cell 1 is 99kpa.
Prepared the lithium ion battery of 10Ah by the method, carry out 1 ~ 5 series winding and connect, then use the high temperature resistant draw point of φ 3mm ~ φ 8mm, carry out with the speed of 10 ~ 40mm/s experiment of threading a needle, battery core is not on fire, do not explode.
Embodiment 2:
A kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid, electrokinetic cell adopts the cell 1 of laminated construction to assemble by several, cell 1 is prepared from by the coated laminated cell 3 of aluminum plastic film 2, in the process of the coated laminated cell 3 of aluminum plastic film 2, between aluminum plastic film 2 and laminated cell 3, fill a fire retardant bag 4 adopting coating film 5 to seal coated liquid flame retardant 6.Coating film 5 is aluminum-plastic composite membrane, and its fracture strength 60N, elongation at break is 20%, and thickness is 80 μm.Liquid flame retardant 6 is carbon tetrachloride liquid, and weight is 10% of cell 1 electrolyte inside weight.Vacuum degree in cell 1 is 99kpa.
Prepared the lithium ion battery of 100Ah by the method, carry out 1 ~ 5 series winding and connect, then use the high temperature resistant draw point of φ 3mm ~ φ 8mm, carry out with the speed of 10 ~ 40mm/s experiment of threading a needle, battery core is not on fire, do not explode.
Embodiment 3:
A kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid, electrokinetic cell adopts the cell 1 of laminated construction to assemble by several, cell 1 is prepared from by the coated laminated cell 3 of aluminum plastic film 2, in the process of the coated laminated cell 3 of aluminum plastic film 2, between aluminum plastic film 2 and laminated cell 3, fill a fire retardant bag 4 adopting coating film 5 to seal coated liquid flame retardant 6.Coating film 5 is aluminum-plastic composite membrane, and its fracture strength 70N, elongation at break is 5%, and thickness is 100 μm.Liquid flame retardant 6 is carbon tetrachloride liquid, and weight is 20% of cell 1 electrolyte inside weight.Vacuum degree in cell 1 is 99kpa.
Prepared the lithium ion battery of 200Ah by the method, carry out 1 ~ 5 series winding and connect, then use the high temperature resistant draw point of φ 3mm ~ φ 8mm, carry out with the speed of 10 ~ 40mm/s experiment of threading a needle, battery core is not on fire, do not explode.
Claims (7)
1. one kind is improved the method for electrokinetic cell fail safe by isolated anti-flaming liquid, described electrokinetic cell adopts the cell (1) of laminated construction to assemble by several, it is characterized in that, cell (1) is prepared from by aluminum plastic film (2) coated laminated cell (3), in the process of aluminum plastic film (2) coated laminated cell (3), between aluminum plastic film (2) and laminated cell (3), fill the fire retardant bag (4) adopting coating film (5) to seal coated liquid flame retardant (6).
2. a kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid according to claim 1, it is characterized in that, described coating film (5) is aluminum-plastic composite membrane, and its fracture strength 40-70N, elongation at break is 5%-20%.
3. a kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid according to claim 1 and 2, it is characterized in that, the thickness of described coating film (5) is 80-120 μm.
4. a kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid according to claim 1 and 2, it is characterized in that, described liquid flame retardant (6) is carbon tetrachloride liquid.
5. a kind of method being improved electrokinetic cell fail safe by isolated anti-flaming liquid according to claim 1 and 2, it is characterized in that, the vacuum degree in described cell (1) is 99kpa.
6. the method being improved electrokinetic cell fail safe by isolated anti-flaming liquid according to claim 1 and 2, it is characterized in that, the quantity of fire retardant bag (4) is one, and its shape and cell (1) structure match.
7. the method being improved electrokinetic cell fail safe by isolated anti-flaming liquid according to claim 1 and 2, it is characterized in that, the weight of liquid flame retardant (6) is the 5-20% of cell (1) electrolyte inside weight.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310406588.6A CN104425844A (en) | 2013-09-09 | 2013-09-09 | Method for improving safety of power battery by isolation type inflame-retardant liquid |
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| CN201310406588.6A CN104425844A (en) | 2013-09-09 | 2013-09-09 | Method for improving safety of power battery by isolation type inflame-retardant liquid |
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| CN104425844A true CN104425844A (en) | 2015-03-18 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405990A (en) * | 2015-12-21 | 2016-03-16 | 中盐安徽红四方锂电有限公司 | Aluminum-plastic film for high-capacity soft package lithium-ion battery |
| CN105789707A (en) * | 2016-05-05 | 2016-07-20 | 深圳市富森联动有限公司 | Fireproof method of soft-packaged lithium battery module |
| CN106972194A (en) * | 2017-04-21 | 2017-07-21 | 天津力神电池股份有限公司 | A kind of lithium ion battery |
| CN107069076A (en) * | 2016-12-29 | 2017-08-18 | 中国电子科技集团公司第十八研究所 | High-safety high-power lithium ion battery |
| CN109585724A (en) * | 2017-09-29 | 2019-04-05 | 郑州宇通客车股份有限公司 | Vehicle and its battery case, battery modules, battery, cell support core |
| CN111584926A (en) * | 2020-05-07 | 2020-08-25 | 珠海冠宇动力电池有限公司 | Lithium ion battery and preparation method thereof |
| US11001695B2 (en) | 2016-01-07 | 2021-05-11 | The Board Of Trustees Of The Leland Stanford Junior University | Fast and reversible thermoresponsive polymer switching materials |
| CN114006026A (en) * | 2021-11-01 | 2022-02-01 | 世一国际新能源有限公司 | Polymer lithium ion battery for energy storage and preparation method thereof |
| CN114156601A (en) * | 2021-11-26 | 2022-03-08 | 蜂巢能源科技有限公司 | Composite membrane for improving thermal spreading performance of battery, preparation method and application thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405990A (en) * | 2015-12-21 | 2016-03-16 | 中盐安徽红四方锂电有限公司 | Aluminum-plastic film for high-capacity soft package lithium-ion battery |
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| US11001695B2 (en) | 2016-01-07 | 2021-05-11 | The Board Of Trustees Of The Leland Stanford Junior University | Fast and reversible thermoresponsive polymer switching materials |
| CN105789707A (en) * | 2016-05-05 | 2016-07-20 | 深圳市富森联动有限公司 | Fireproof method of soft-packaged lithium battery module |
| CN105789707B (en) * | 2016-05-05 | 2018-10-26 | 深圳市智行能源技术有限公司 | A kind of soft package lithium battery module method of fire protection |
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| CN106972194A (en) * | 2017-04-21 | 2017-07-21 | 天津力神电池股份有限公司 | A kind of lithium ion battery |
| CN109585724A (en) * | 2017-09-29 | 2019-04-05 | 郑州宇通客车股份有限公司 | Vehicle and its battery case, battery modules, battery, cell support core |
| CN111584926A (en) * | 2020-05-07 | 2020-08-25 | 珠海冠宇动力电池有限公司 | Lithium ion battery and preparation method thereof |
| CN114006026A (en) * | 2021-11-01 | 2022-02-01 | 世一国际新能源有限公司 | Polymer lithium ion battery for energy storage and preparation method thereof |
| CN114006026B (en) * | 2021-11-01 | 2024-03-08 | 世一国际新能源有限公司 | Polymer lithium ion battery for energy storage and preparation method thereof |
| CN114156601A (en) * | 2021-11-26 | 2022-03-08 | 蜂巢能源科技有限公司 | Composite membrane for improving thermal spreading performance of battery, preparation method and application thereof |
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| CB02 | Change of applicant information |
Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No. Applicant after: Universal A 1 System Co., Ltd Applicant after: Wanxiang Electric Vehicle Co., Ltd. Applicant after: Wanxiang Group Corporation Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No. Applicant before: ZHEJIANG WANXIANG YINENG POWER BATTERY CO., LTD. Applicant before: Wanxiang Electric Vehicle Co., Ltd. Applicant before: Wanxiang Group Corporation |
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Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG WANXIANG YINENG POWER BATTERY CO., LTD. TO: WANXIANG A123 SYSTEMS CO., LTD. |
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Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang District, No. two road, building No. 855, No. Applicant after: Wanxiang 123 Co Ltd Applicant after: Wanxiang Electric Vehicle Co., Ltd. Applicant after: Wanxiang Group Corporation Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No. Applicant before: Universal A 1 System Co., Ltd Applicant before: Wanxiang Electric Vehicle Co., Ltd. Applicant before: Wanxiang Group Corporation |
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Application publication date: 20150318 |