CN202839829U - Safety device of lithium ion battery - Google Patents
Safety device of lithium ion battery Download PDFInfo
- Publication number
- CN202839829U CN202839829U CN2012203807127U CN201220380712U CN202839829U CN 202839829 U CN202839829 U CN 202839829U CN 2012203807127 U CN2012203807127 U CN 2012203807127U CN 201220380712 U CN201220380712 U CN 201220380712U CN 202839829 U CN202839829 U CN 202839829U
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- China
- Prior art keywords
- pole
- lithium ion
- safety device
- ion battery
- coping plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
Abstract
The utility model belongs to the field of lithium ion batteries, and particularly relates to a safety device of a lithium ion battery. The safety device of the lithium ion battery comprises a top cover piece, a first post, a second post, an explosion-proof valve and a conducting piece, wherein the first post, the second post and the explosion-proof valve are arranged on the top cover piece, the first post is in electric connection with the top cover piece, the second post is assembled with the top cover piece in an insulation mode, and the second post is in electric connection with the conducting piece. The top cover piece is further provided with an air pressure overturning piece, and a score is formed on the air pressure overturning piece. According to the safety device of the lithium ion battery, potential safety hazards caused by over charge when a battery cell is in an accident; energy of the battery cell in the accident is released through an external short circuit, and therefore a bigger safety accident is avoided; and safety performance of the battery is guaranteed.
Description
Technical field
The utility model belongs to the lithium ion battery field, relates in particular to a kind of safety device of lithium ion battery.
Background technology
Along with the development of modern society and the enhancing of people's environmental consciousness, increasing equipment is selected with chargeable secondary cell as power supply, such as mobile phone, notebook computer, electric tool and electric automobile etc., this provides wide space for the application of chargeable secondary cell and development.
Electric automobile and energy-accumulating power station etc. generally need to use to have jumbo electrokinetic cell as power supply.These electrokinetic cells are except having high power capacity, also should have good fail safe and long cycle life etc., just can reach the standard of use and satisfy people's demand.
In order to guarantee to a certain extent the fail safe of electrokinetic cell, generally at battery cap a relief valve is installed.When battery owing to improper charging, short circuit or be exposed to when meeting accident in the adverse circumstances such as high temperature, high-octane battery will produce a large amount of gas and temperature sharply raises, gas is washed the purpose that relief valve reaches pressure release open.The existence of relief valve can improve the security performance of battery to a certain extent, but because the energy that the battery itself that meets accident is assembled can not get discharging, making itself is exactly a hidden danger body, there is certain safety problem, if continue again after battery meets accident to overcharge, then can cause larger security incident.
And in being 201010171095.5 patent of invention, application number improved a kind of rechargeable battery; this battery is by the outer electrode short circuit and keep short-circuit condition and improve fail safe when overcharging; the battery of prior art all has explosion-protection equipment; the battery that explosion-protection equipment is not set has the possibility of hydrojet blast on fire; danger very; and the battery that is provided with safety guard might be because the damage of short circuit member fails in time to discharge dangerous energy, or has larger danger.
The utility model content
The purpose of this utility model is: for the deficiencies in the prior art, and provide a kind of safety device of lithium ion battery, this device can prevent that on the one hand battery core is in the potential safety hazard that initiation occurs overcharging when unexpected; Discharge accident battery core energy by external short circuit on the other hand, avoid causing larger security incident; Guarantee the security performance of battery.
For achieving the above object, the utility model adopts following technical scheme: a kind of safety device of lithium ion battery, comprise coping plate, the first pole, the second pole, explosion-proof valve and conducting strip, described the first pole, described the second pole and described explosion-proof valve are arranged at respectively described coping plate, described the first pole is electrically connected with described coping plate, described the second pole and described coping plate insulation assembling, described the second pole is electrically connected with described conducting strip, wherein, described coping plate also is provided with the Pneumatic turnover sheet, and described Pneumatic turnover sheet is provided with indentation.
Described the first pole is electrically connected with described coping plate by welding or riveted joint.
Described the second pole is by injection mo(u)lding and described coping plate insulation assembling.
The below of described the first pole and described the second pole is respectively arranged with switching piece, and described switching piece is electrically connected with described the first pole and described the second pole respectively.
Described coping plate be shaped as rectangle, circle or oval.
Described coping plate arranges porose, and described Pneumatic turnover sheet is arranged in the described hole by laser welded seal.
The cross section of described Pneumatic turnover sheet be shaped as circular arc.
The degree of depth of described indentation is 0.05 ~ 2mm.
The degree of depth of described indentation is 0.1 ~ 1mm.
The beneficial effects of the utility model are: the utility model comprises coping plate, the first pole, the second pole, explosion-proof valve and conducting strip, described the first pole, described the second pole and described explosion-proof valve are arranged at respectively described coping plate, described the first pole is connected with described coping plate conducting, described the second pole and described coping plate insulation assembling, described the second pole is connected with described conducting strip conducting, wherein, described coping plate also is provided with the Pneumatic turnover sheet, and described Pneumatic turnover sheet is provided with indentation; The air pressure that Pneumatic turnover sheet when upset needs is lower, can be when reaching a certain restriction air pressure instant reverse, make battery form safe short circuit, can prevent that by said apparatus battery core is in the potential safety hazard that initiation occurs overcharging when unexpected; And discharge accident battery core energy by external short circuit, avoid causing larger security incident; Guarantee the security performance of battery.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A section enlarged drawing of Fig. 1.
Wherein, 1---conducting strip, 2---switching piece, 3---the second pole, 4---the first pole, 5---hole, 6---explosion-proof valve, 7---coping plate, 8---Pneumatic turnover sheet, 9---indentation.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Such as Fig. 1, shown in 2, a kind of safety device of lithium ion battery, comprise coping plate 7, the first pole 4, the second pole 3, explosion-proof valve 6 and conducting strip 1, the first pole 4, the second pole 3 and explosion-proof valve 6 are arranged at respectively coping plate 7, the first pole 4 is electrically connected with coping plate 7, the second pole 3 and coping plate 7 insulation assemblings, the second pole 3 is electrically connected with conducting strip 1, wherein, coping plate 3 also is provided with Pneumatic turnover sheet 8, and Pneumatic turnover sheet 8 is provided with indentation 9, and the inversion air pressure of Pneumatic turnover sheet 8 is 0.3 ~ 0.5MPa, and can not break under 0.7MPa air pressure, turning height is not less than 0.5mm.
Preferably, the first pole 4 is electrically connected with coping plate 7 by welding or riveted joint, and wherein, the material of coping plate 7 is aluminium alloy or stainless steel etc.
Preferably, the second pole 3 is by injection mo(u)lding and coping plate 7 insulation assemblings.
Preferably, the below of the first pole 4 and the second pole 3 is respectively arranged with switching piece 2, and switching piece 2 is electrically connected with the first pole 4 and the second pole 3 respectively.
Preferably, coping plate 7 be shaped as rectangle, circle or oval, the shape of coping plate 7 can be decided according to practicality.
Preferably, it is porose 5 that described coping plate arranges, and described Pneumatic turnover sheet 8 is arranged in the described hole 5 by laser welded seal.
The cross section of Pneumatic turnover sheet 8 be shaped as circular arc.
Preferably, the degree of depth of indentation 9 is 0.05 ~ 2mm.
The degree of depth of indentation 9 is 0.1 ~ 1mm, and the degree of depth of general indentation 9 is about 0.25.Because the adjusting in this degree of depth can improve inversion air pressure, be fixedly connected with the edge in hole 5 around the rotating sheet with indentation 9, the degree of depth of indentation 9 is darker, and Pneumatic turnover sheet 8 needs the air pressure of upset lower.
When battery core meets accident, will inevitably cause the battery core air pressure inside to raise and the temperature rising, when interior pressure reaches the eversion pressure of Pneumatic turnover sheet 8, Pneumatic turnover sheet 8 moments sudden change upset is fitted with conducting strip 1 and is formed external short circuit, make the battery plus-negative plate contact carry out safe short circuit dischange, guarantee the safety of battery.
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 utility model is not limited to above-mentioned embodiment, and any apparent improvement, replacement or modification that every those skilled in the art have done on basis of the present utility model all belong to protection range 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 (9)
1. the safety device of a lithium ion battery, comprise coping plate (7), the first pole (4), the second pole (3), explosion-proof valve (6) and conducting strip (1), described the first pole (4), described the second pole (3) and described explosion-proof valve (6) are arranged at respectively described coping plate (7), described the first pole (4) is electrically connected with described coping plate (7), described the second pole (3) and described coping plate (7) insulation assembling, described the second pole (3) is electrically connected with described conducting strip (1), it is characterized in that: described Ding Gai Pian ﹙ 3 ﹚ also are provided with Pneumatic turnover sheet (8), and described Pneumatic turnover sheet (8) is provided with indentation (9).
2. the safety device of lithium ion battery according to claim 1, it is characterized in that: described the first pole (4) is electrically connected with described Ding Gai Pian ﹙ 7 ﹚ by welding or riveted joint.
3. the safety device of lithium ion battery according to claim 1 is characterized in that: described the second pole (3) is by injection mo(u)lding and described Ding Gai Pian ﹙ 7 ﹚ insulation assembling.
4. the safety device of lithium ion battery according to claim 1, it is characterized in that: the below of described the first pole (4) and described the second pole (3) is respectively arranged with switching piece (2), and described switching piece (2) is electrically connected with described the first pole (4) and described the second pole (3) respectively.
5. the safety device of lithium ion battery according to claim 1 is characterized in that: described coping plate (7) be shaped as rectangle, circle or oval.
6. the safety device of lithium ion battery according to claim 1, it is characterized in that: described coping plate arranges porose (5), and described Pneumatic turnover sheet (8) is arranged at institute by laser welded seal and states among hole ﹙ 5 ﹚.
7. the safety device of lithium ion battery according to claim 1 is characterized in that: the cross section of described Pneumatic turnover sheet (8) be shaped as circular arc.
8. the safety device of lithium ion battery according to claim 1, it is characterized in that: the degree of depth of described indentation (9) is 0.05 ~ 2mm.
9. the safety device of lithium ion battery according to claim 8, it is characterized in that: the degree of depth of described indentation (9) is 0.1 ~ 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203807127U CN202839829U (en) | 2012-08-02 | 2012-08-02 | Safety device of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203807127U CN202839829U (en) | 2012-08-02 | 2012-08-02 | Safety device of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202839829U true CN202839829U (en) | 2013-03-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203807127U Expired - Lifetime CN202839829U (en) | 2012-08-02 | 2012-08-02 | Safety device of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202839829U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655537A (en) * | 2016-03-24 | 2016-06-08 | 深圳市瑞德丰精密制造有限公司 | Burst and power-off protection structure for battery |
| CN105762307A (en) * | 2016-04-26 | 2016-07-13 | 宁德时代新能源科技股份有限公司 | Secondary cell top cap and secondary cell |
| CN107403885A (en) * | 2016-05-20 | 2017-11-28 | 宁德时代新能源科技股份有限公司 | Secondary cell safety top cap |
| CN109564992A (en) * | 2016-08-01 | 2019-04-02 | 江森自控科技公司 | The additives for overcharge protection system of square lithium ion battery cell with bias encapsulation |
| CN116031586A (en) * | 2023-02-09 | 2023-04-28 | 深圳海润新能源科技有限公司 | Energy storage device and electric equipment |
-
2012
- 2012-08-02 CN CN2012203807127U patent/CN202839829U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655537A (en) * | 2016-03-24 | 2016-06-08 | 深圳市瑞德丰精密制造有限公司 | Burst and power-off protection structure for battery |
| CN105762307A (en) * | 2016-04-26 | 2016-07-13 | 宁德时代新能源科技股份有限公司 | Secondary cell top cap and secondary cell |
| CN105762307B (en) * | 2016-04-26 | 2018-05-22 | 宁德时代新能源科技股份有限公司 | Secondary cell top cap and secondary cell |
| CN107403885A (en) * | 2016-05-20 | 2017-11-28 | 宁德时代新能源科技股份有限公司 | Secondary cell safety top cap |
| CN109564992A (en) * | 2016-08-01 | 2019-04-02 | 江森自控科技公司 | The additives for overcharge protection system of square lithium ion battery cell with bias encapsulation |
| US11245163B2 (en) | 2016-08-01 | 2022-02-08 | Cps Technology Holdings Llc | Overcharge protection systems for prismatic lithium ion battery cells with biased packaging |
| CN109564992B (en) * | 2016-08-01 | 2022-07-08 | Cps科技控股有限公司 | Overcharge protection system for prismatic lithium-ion battery cells with biased packaging |
| US11594792B2 (en) | 2016-08-01 | 2023-02-28 | Cps Technology Holdings Llc | Overcharge protection systems for prismatic lithium ion battery cells with biased packaging |
| CN116031586A (en) * | 2023-02-09 | 2023-04-28 | 深圳海润新能源科技有限公司 | Energy storage device and electric equipment |
| CN116031586B (en) * | 2023-02-09 | 2023-06-27 | 深圳海润新能源科技有限公司 | Energy storage device and electric equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 352100 Jiaocheng District of Ningde City, Fujian Province Zhang Wan Zhen Xingang Road No. 1 Patentee after: Contemporary Amperex Technology Co.,Ltd. Address before: 352100 Jiaocheng District of Ningde City, Fujian Province Zhang Wan Zhen Xingang Road No. 1 West Building 1F- research Patentee before: CONTEMPORARY AMPEREX TECHNOLOGY Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
|
| CX01 | Expiry of patent term |