CN202678422U - Safe lithium iron battery - Google Patents
Safe lithium iron battery Download PDFInfo
- Publication number
- CN202678422U CN202678422U CN2012202340907U CN201220234090U CN202678422U CN 202678422 U CN202678422 U CN 202678422U CN 2012202340907 U CN2012202340907 U CN 2012202340907U CN 201220234090 U CN201220234090 U CN 201220234090U CN 202678422 U CN202678422 U CN 202678422U
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- Prior art keywords
- packing layer
- battery
- inner packing
- lithium ion
- lithium iron
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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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Abstract
The utility model discloses a safe lithium iron battery. The safe lithium iron battery comprises an electrode assembly and an inner packing layer for filling nonaqueous electrolyte, wherein the electrode assembly is arranged in the inner packing layer; and a sealed outer packing layer for filling flame retardants is arranged outside the inner packing layer. According to the safe lithium iron battery, a double-layer packing structure is provided, and the flame retardants are arranged in the outer packing layer, so that the safety performance of the battery is improved, and the flame retardants are prevented from influencing the normal performance of the battery.
Description
Technical field
The utility model belongs to the lithium ion battery field, and a kind of security performance of improving battery specifically can be protected again the safety lithium ion cell of the normal performance of battery.
Background technology
Lithium ion battery have energy density high, have extended cycle life, the outstanding advantages such as energy conversion efficiency height, in the mobile device power supply, occupy dominant position, also be one of most promising energy storage means in the application such as electric automobile, intelligent grid.These applications improve day by day to the energy density of lithium ion battery, the requirement of single battery capacity.The lithium ion battery that notebook computer uses has risen to present 3 ~ 4Ah from about single capacity 2Ah; And the capacity of automobile batteries, the single battery core of energy-storage battery has reached the level of tens Ah even 100 Ah especially.Because lithium ion battery uses inflammable organic solvent as electrolyte solvent, has the hidden danger of secure context.The increase of single battery capacity causes the security risk of battery sharply to increase, and therefore need to take effective measures, and solves the potential safety hazard of battery.
In electrolyte, add the compound with fire retardation, can effectively improve the security performance of battery.So-called fire retardation can make the combustion limits oxygen index of electrolyte raise or has the self-gravitation performance even electrolyte can not be lighted or aphlogistic performance after referring to add.Wherein alkyl phosphate or phosphonate ester have higher flame retardant effect, but phosphate, phosphite ester, phosphonate ester flame-retardant additive can decompose at graphite surface, cause aerogenesis to expand and the peeling off of graphite, and battery can't be worked.Adding the anode film for additive in electrolyte can make moderate progress to peeling off of graphite, but usually only in the situation that flame-retardant additive concentration is lower just can play a role, and phosphonate ester, when phosphate concentration is low to the security performance of battery without obvious improvement.
The utility model content
The purpose of this utility model is: overcome the deficiencies in the prior art, a kind of safety lithium ion cell of new structure is provided, improved the security performance of lithium ion battery, avoid simultaneously fire retardant on the impact of the normal performance of battery.
The technical solution of the utility model is: a kind of safety lithium ion cell, and comprise electrode assemblie and be used for the inner packing layer of perfusion nonaqueous electrolytic solution, electrode assemblie is arranged at the inner packing layer, and the inner packing layer is outside equipped with the external packing layer that is used for filling flame retardant of sealing.The external packing layer can completely cut off outer field flame retardant, makes outer field flame retardant can not penetrate into inner packing layer internal layer, causes the deterioration with battery performance of peeling off of internal layer graphite; Outer field flame retardant can play fire-retardant effect when battery is abused, reach the purpose of improving cell safety.Wherein, this flame retardant is to be adsorbed on the high adsorption carrier by fire retardant to consist of.Such structure can make fire retardant better be preserved, and makes simultaneously the more difficult inner packing layer internal layer that penetrate into of fire retardant, plays good buffer action.
As further improvement of the utility model, this electrode assemblie is reeled by positive pole, negative pole and barrier film and is formed, and barrier film is between anode pole piece and the cathode pole piece, and lug anodal and negative pole is extended outside inner packing layer and the external packing layer.
As further improvement of the utility model, this external packing layer is 0.1-15mm to the distance of inner packing layer.Guarantee that external packing layer and inner packing layer have enough distances, better deposit flame retardant, play simultaneously good buffer action.
The beneficial effects of the utility model are: the utility model is disposed with inner packing layer and external packing layer outside electrode assemblie, the injection of external packing layer burnt to nonaqueous electrolytic solution and had the flame retardant of fire retardation, the inner packing layer can completely cut off the flame retardant in the external packing layer, make the flame retardant of outer packing device layer can not penetrate into the inner packing layer, avoid the inner packing layer graphite peel off deterioration with battery performance; Flame retardant in the external packing layer can play fire-retardant effect when battery is abused, reach the purpose of improving cell safety.
Description of drawings
Fig. 1 is the structural representation of lithium ion battery of the present utility model.
Embodiment
Below in conjunction with embodiment and test result, the utility model is described in further detail.But execution mode of the present utility model is not limited to this.
With reference to shown in Figure 1, a kind of safety lithium ion cell comprises electrode assemblie 1, is used for the inner packing layer 2 of perfusion nonaqueous electrolytic solution; This electrode assemblie 1 is coated by inner packing layer 2, and coats the external packing layer 3 that one deck is used for loading flame retardant on its surface again.External packing layer 3 can completely cut off outer field flame retardant, makes outer field flame retardant can not penetrate into inner packing layer 2 internal layer, causes the deterioration with battery performance of peeling off of internal layer graphite; Outer field flame retardant can play fire-retardant effect when battery is abused, reach the purpose of improving cell safety.Wherein, this flame retardant is to be adsorbed on the high adsorption carrier by fire retardant to consist of.Such structure can make fire retardant better be preserved, and makes simultaneously more difficult inner packing layer 2 internal layer that penetrate into of fire retardant, plays good buffer action.
This electrode assemblie 1 is reeled by positive pole, negative pole and barrier film and is formed, and barrier film is between anode pole piece and the cathode pole piece, and lug 5 anodal and negative pole is extended outside inner packing layer 2 and the external packing layer 3.
This external packing layer 3 is 0.1-15mm to the distance of inner packing layer 2.Guarantee that external packing layer 3 and inner packing layer 2 have enough distances, better deposit flame retardant, play simultaneously good buffer action.
The according to the above description announcement of book and instruction, the utility model those skilled in the art can also change and revise above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although used some specific terms in this specification, these terms do not consist of any restriction to the utility model just for convenience of description.
Claims (3)
1. safety lithium ion cell comprises electrode assemblie and is used for the inner packing layer of perfusion nonaqueous electrolytic solution that described electrode assemblie is arranged at the inner packing layer, it is characterized in that: described inner packing layer is outside equipped with the external packing layer that is used for filling flame retardant of sealing.
2. safety lithium ion cell according to claim 1, it is characterized in that: described electrode assemblie is reeled by positive pole, negative pole and barrier film and is formed, barrier film is between anode pole piece and the cathode pole piece, and lug anodal and negative pole is extended outside inner packing layer and the external packing layer.
3. safety lithium ion cell according to claim 1, it is characterized in that: described external packing layer is 0.1-15mm to the distance of inner packing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202340907U CN202678422U (en) | 2012-05-23 | 2012-05-23 | Safe lithium iron battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202340907U CN202678422U (en) | 2012-05-23 | 2012-05-23 | Safe lithium iron battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678422U true CN202678422U (en) | 2013-01-16 |
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ID=47499302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202340907U Expired - Lifetime CN202678422U (en) | 2012-05-23 | 2012-05-23 | Safe lithium iron battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN202678422U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269504A (en) * | 2014-09-30 | 2015-01-07 | 四川长虹电源有限责任公司 | Lithium ion battery and lithium ion battery pack |
| WO2015158042A1 (en) * | 2014-04-14 | 2015-10-22 | 浙江君飞科技有限公司 | Storage battery with fireproof feature |
| 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 |
| CN105742728A (en) * | 2014-12-09 | 2016-07-06 | 北京有色金属研究总院 | Lithium-ion secondary battery |
| 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 |
| CN109962284A (en) * | 2017-12-22 | 2019-07-02 | 宁德新能源科技有限公司 | The manufacturing method of electrochemical appliance and electrochemical appliance |
| WO2023193152A1 (en) * | 2022-04-06 | 2023-10-12 | 宁德时代新能源科技股份有限公司 | Battery cell as well as manufacturing method and manufacturing apparatus therefor, battery, and electric apparatus |
-
2012
- 2012-05-23 CN CN2012202340907U patent/CN202678422U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015158042A1 (en) * | 2014-04-14 | 2015-10-22 | 浙江君飞科技有限公司 | Storage battery with fireproof feature |
| CN104269504A (en) * | 2014-09-30 | 2015-01-07 | 四川长虹电源有限责任公司 | Lithium ion battery and lithium ion battery pack |
| CN105742728A (en) * | 2014-12-09 | 2016-07-06 | 北京有色金属研究总院 | Lithium-ion secondary battery |
| 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 |
| CN105405990B (en) * | 2015-12-21 | 2018-04-20 | 中盐安徽红四方锂电有限公司 | A kind of aluminum plastic film of large capacity soft bag lithium ionic cell |
| 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 |
| CN109962284A (en) * | 2017-12-22 | 2019-07-02 | 宁德新能源科技有限公司 | The manufacturing method of electrochemical appliance and electrochemical appliance |
| WO2023193152A1 (en) * | 2022-04-06 | 2023-10-12 | 宁德时代新能源科技股份有限公司 | Battery cell as well as manufacturing method and manufacturing apparatus therefor, battery, and electric apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |
|
| CX01 | Expiry of patent term |