CN202839773U - Power battery safety top cap - Google Patents
Power battery safety top cap Download PDFInfo
- Publication number
- CN202839773U CN202839773U CN2012204196243U CN201220419624U CN202839773U CN 202839773 U CN202839773 U CN 202839773U CN 2012204196243 U CN2012204196243 U CN 2012204196243U CN 201220419624 U CN201220419624 U CN 201220419624U CN 202839773 U CN202839773 U CN 202839773U
- Authority
- CN
- China
- Prior art keywords
- pole
- top cap
- circuit protection
- conducting strip
- coping plate
- Prior art date
- 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.)
- Expired - Lifetime
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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 technical field of power batteries, and particularly relates to a power battery safety top cap. The power battery safety top cap comprises a top cap piece, a first pole, a second pole, a pressure release valve, a liquid filling hole and a safety turning valve, wherein the first pole, the second pole, the pressure release valve, the liquid filling hole and the safety turning valve are arranged on the top cap piece, the first pole is electrically connected with the top cap piece, the second pole is assembled with the top cap piece in an insulation mode, the safety turning valve is electrically connected with the top cap piece, a short circuit protection conducting strip is arranged above the top cap piece, the short circuit protection conducting strip is electrically connected with the second pole, the short circuit protection conducting strip is located over the safety turning valve, the first pole comprises an insulation body, a metal gasket and a resistance block, and the resistance block is arranged inside the insulation body. Compared with the prior art, the resistance block is added to the power battery safety top cap so that a circuit current is controlled through controlling of a circuit resistance when an external short circuit happens, and therefore the protection to the safety turning valve and the short circuit protection conducting piece is achieved. On one hand, potential safety hazards caused when accidents happen to a battery are prevented; and on the other hand, battery energy is discharged through the external short circuit, and greater safety accidents are prevented from happening.
Description
Technical field
The utility model belongs to the power battery technology field, relates in particular to a kind of electrokinetic cell top cover with safety protection function.
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.
For in the fail safe that guarantees 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.
Safe roll-over valve is installed on some battery cap in the prior art, can increases to a certain extent the security performance of electrokinetic cell.But during actual the use, when battery produced super-high-current because being short-circuited, safe roll-over valve may be by burn through, thereby caused the danger such as hydrojet, on fire and blast, and therefore, its security performance is also not satisfactory.
In view of this; necessaryly provide a kind of electrokinetic cell top cover with safety protection function; include the structure that to protect safe roll-over valve in this top cover; overcharging and discharge the inside battery energy that meets accident after can preventing battery to meet accident, thus the security performance of electrokinetic cell further improved.
The utility model content
The purpose of this utility model is: for the deficiencies in the prior art; and provide a kind of electrokinetic cell top cover with safety protection function; include the structure that to protect safe roll-over valve in this top cover; overcharging and discharge the inside battery energy that meets accident after preventing battery to meet accident; thereby further improve the security performance of electrokinetic cell, to overcome the not satisfactory deficiency of electrokinetic cell top cover of the prior art fail safe.
In order to achieve the above object; the technical solution adopted in the utility model is: a kind of electrokinetic cell safety top cover; comprise coping plate and the first pole that is arranged on the coping plate; the second pole; relief valve; liquid injection hole and safe roll-over valve; the first pole and coping plate are electrically connected; the second pole and coping plate insulation assembling; safe roll-over valve and coping plate are electrically connected; the coping plate top is provided with the short-circuit protection conducting strip; the short-circuit protection conducting strip is electrically connected with the second pole; the short-circuit protection conducting strip is positioned at the top of safe roll-over valve; the first pole comprises insulator; backing metal and the resistance bolck that is arranged at the first pole position, resistance bolck is arranged on insulator inside.The size of current that the first pole internal electrical connects a resistance bolck when controlling external short circuit, thus safe roll-over valve and short-circuit protection conducting strip protected.
As a kind of improvement of the utility model electrokinetic cell safety top cover, resistance bolck is between the first pole and coping plate, and the first pole is by resistance bolck and coping plate conducting.
As a kind of improvement of the utility model electrokinetic cell safety top cover, the resistance sizes of resistance bolck is 2-5mohm.
As a kind of improvement of the utility model electrokinetic cell safety top cover, the planform of resistance bolck is circle, ellipse or rectangle.
As a kind of improvement of the utility model electrokinetic cell safety top cover, resistance bolck adopts the electric conducting material of the high resistivities such as Aludirome or stainless steel to make.
As a kind of improvement of the utility model electrokinetic cell safety top cover, safe roll-over valve is connected with coping plate, and the short-circuit protection conducting strip is connected with the second pole.
As a kind of improvement of the utility model electrokinetic cell safety top cover, the connected mode of short-circuit protection conducting strip and the second pole is for welding, rivet, be spirally connected or bonding.
As a kind of improvement of the utility model electrokinetic cell safety top cover, safe roll-over valve is welded in coping plate.
As a kind of improvement of the utility model electrokinetic cell safety top cover, the end that safe roll-over valve is connected with the short-circuit protection conducting strip is less than the thickness of the other end.
With respect to prior art; the utility model is by arranging safe roll-over valve at coping plate; in safe roll-over valve the short-circuit protection conducting strip is set; when battery appearance accident causes air pressure to be increased to predetermined safe roll-over valve pressure; safe roll-over valve is overturn, and and short-circuit protection conducting strip realization external short circuit.Again owing to being arranged on resistance bolck between the first pole and the coping plate, thereby the size of current during the control external short circuit can protect safe roll-over valve not kept its effect by burn through, to reach the effect of safeguard protection.Therefore, electrokinetic cell safety top cover of the present utility model can also prevent that battery from overcharging the potential safety hazard of initiation when accident occurring; Discharge the accident energy content of battery by external short circuit on the other hand, avoid causing larger security incident.
Description of drawings
Fig. 1 is cutaway view of the present utility model.
Fig. 2 is the A place enlarged diagram among Fig. 1.
Fig. 3 is the exploded view of the utility model resistance bolck.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage are more clear, in conjunction with the following drawings, and to its further description.
As shown in Figure 1 to Figure 3; a kind of electrokinetic cell safety top cover; comprise coping plate 2 and the first pole 1 that is arranged on the coping plate 2; the second pole 7; relief valve 4; liquid injection hole 3 and safe roll-over valve 6; the first pole 1 and coping plate 2 are electrically connected; the second pole 7 and coping plate 2 insulation assemblings; safe roll-over valve 6 and coping plate 2 are electrically connected; coping plate 2 tops are provided with short-circuit protection conducting strip 5; short-circuit protection conducting strip 5 is electrically connected with the second pole 7; short-circuit protection conducting strip 5 is positioned at the top of safe roll-over valve 6; the first pole 1 comprises insulator 11; backing metal 12 and the resistance bolck 13 that is arranged at the first pole 1 position, resistance bolck 13 is arranged between the insulator 11.The size of current that the first pole 1 internal electrical connects a resistance bolck 13 when controlling external short circuit, thus can guarantee that short-circuit protection conducting strip 5 and safe roll-over valve 6 are molten, safe roll-over valve 6 and short-circuit protection conducting strip 5 can be damaged.The arranging of resistance bolck 13 can adopt hardware stamping or or the mode such as machine work realize.
The resistance sizes of resistance bolck 13 is 2-5mohm.
The planform of resistance bolck 13 is circle, ellipse or rectangle.
Safe roll-over valve 6 is connected with coping plate 2, and short-circuit protection conducting strip 5 is connected with the second pole 7.
The connected mode of short-circuit protection conducting strip 5 and the second pole 7 is for welding, rivet, be spirally connected or bonding.So that short-circuit protection conducting strip 5 is realized being electrically connected with coping plate 2 and the second pole 7 simultaneously.
Safe roll-over valve 6 is welded in coping plate 2.Concrete, safe roll-over valve 6 can be connected in the hole that coping plate 2 is provided with by laser welded seal.Wherein, safe roll-over valve 6 and short-circuit protection conducting strip 5 should adopt also higher material of fusing point, such as copper or iron etc.
The end that safe roll-over valve 6 is connected with short-circuit protection conducting strip 5 is less than the thickness of the other end.Wherein, short-circuit protection conducting strip 5 be positioned at safe roll-over valve 6 directly over, when battery met accident, safe roll-over valve 6 in uneven thickness was convenient to its upset, safe roll-over valve 6 easily contacts with short-circuit protection conducting strip 5.The inversion air pressure of safe roll-over valve 6 is 0.3 ~ 0.5MPa, and can not break under 0.7MPa air pressure, and turning height is not less than 0.5mm.
Under normal circumstances, safe roll-over valve 6 does not contact with short-circuit protection conducting strip 5; When battery met accident, inside battery air pressure raise, and when interior pressure reached the eversion pressure of safe roll-over valve 6, safe roll-over valve 6 actions also contacted with short-circuit protection conducting strip 5, thereby make battery realize external short circuit.The first pole 1 and the second pole 7 are controlled size of current by the resistance that arranges wherein, thus control caloric value size, thus protect safe roll-over valve 6 not by burn through, reach the effect of the safe roll-over valve 6 of protection.Like this, on the one hand can guarantee to digest and overcharge electric current, can discharge the hidden danger energy content of battery on the other hand, eliminate safe hidden trouble.
The according to the above description announcement of book and instruction, the utility model those skilled in the art can also carry out suitable change and modification to 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 (9)
1. electrokinetic cell safety top cover; comprise coping plate (2) and be arranged on the first pole (1) on the described coping plate (2); the second pole (7); relief valve (4); liquid injection hole (3) and safe roll-over valve (6); described the first pole (1) and described coping plate (2) are electrically connected; described the second pole (7) and described coping plate (2) insulation assembling; described safe roll-over valve (6) and described coping plate (2) are electrically connected; it is characterized in that: described coping plate (2) top is provided with short-circuit protection conducting strip (5); described short-circuit protection conducting strip (5) is electrically connected with described the second pole (7); described short-circuit protection conducting strip (5) is positioned at the top of described safe roll-over valve (6); described the first pole (1) comprises insulator (11); backing metal (12) and resistance bolck (13), described resistance bolck (13) are arranged on described insulator (11) inside.
2. electrokinetic cell safety top cover according to claim 1, it is characterized in that: described resistance bolck (13) is positioned between described the first pole (1) and the coping plate (2), and described the first pole (1) is by resistance bolck (13) and coping plate (2) conducting.
3. electrokinetic cell safety top cover according to claim 1, it is characterized in that: the resistance sizes of described resistance bolck (13) is 2-5mohm.
4. electrokinetic cell safety top cover according to claim 3 is characterized in that: described resistance bolck (13) be shaped as circle, ellipse or rectangle.
5. electrokinetic cell safety top cover according to claim 1, it is characterized in that: described resistance bolck (13) is set to Aludirome resistance bolck or electric resistance of stainless piece.
6. electrokinetic cell safety top cover according to claim 1, it is characterized in that: described safe roll-over valve (6) is connected with described coping plate (2), and described short-circuit protection conducting strip (5) is connected with described the second pole (7).
7. electrokinetic cell safety top cover according to claim 1 is characterized in that: the connected mode of described short-circuit protection conducting strip (5) and described the second pole (7) is for welding, rivet, be spirally connected or bonding.
8. electrokinetic cell safety top cover according to claim 1, it is characterized in that: described safe roll-over valve (6) is welded in described coping plate (2).
9. electrokinetic cell safety top cover according to claim 8, it is characterized in that: described safe roll-over valve (6) is less than the thickness of the other end with the end that described short-circuit protection conducting strip (5) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204196243U CN202839773U (en) | 2012-08-23 | 2012-08-23 | Power battery safety top cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204196243U CN202839773U (en) | 2012-08-23 | 2012-08-23 | Power battery safety top cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202839773U true CN202839773U (en) | 2013-03-27 |
Family
ID=47951407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204196243U Expired - Lifetime CN202839773U (en) | 2012-08-23 | 2012-08-23 | Power battery safety top cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202839773U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160093867A1 (en) * | 2014-09-29 | 2016-03-31 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| US20160204397A1 (en) * | 2015-01-12 | 2016-07-14 | Ningde Amperex Technology Limited | Cap assembly of power battery |
| US9640786B2 (en) | 2013-11-11 | 2017-05-02 | Ningde Amperex Technology Limited | Safety cap assembly of power battery |
| CN106920909A (en) * | 2015-12-25 | 2017-07-04 | 财团法人工业技术研究院 | Battery safety valve actuating structure |
| CN107248554A (en) * | 2017-06-27 | 2017-10-13 | 东莞塔菲尔新能源科技有限公司 | Top cover structure of power battery and electrokinetic cell |
| CN108075055A (en) * | 2016-11-16 | 2018-05-25 | 宁德时代新能源科技股份有限公司 | Power battery top cover structure and power battery |
-
2012
- 2012-08-23 CN CN2012204196243U patent/CN202839773U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9640786B2 (en) | 2013-11-11 | 2017-05-02 | Ningde Amperex Technology Limited | Safety cap assembly of power battery |
| US9825277B2 (en) * | 2014-09-29 | 2017-11-21 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| CN105470549A (en) * | 2014-09-29 | 2016-04-06 | 三星Sdi株式会社 | Rechargeable battery |
| KR20160038176A (en) * | 2014-09-29 | 2016-04-07 | 삼성에스디아이 주식회사 | Rechargeable battery |
| KR102282244B1 (en) * | 2014-09-29 | 2021-07-28 | 삼성에스디아이 주식회사 | Rechargeable battery |
| US20160093867A1 (en) * | 2014-09-29 | 2016-03-31 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| CN105470549B (en) * | 2014-09-29 | 2019-09-06 | 三星Sdi株式会社 | Rechargeable battery |
| CN105845848A (en) * | 2015-01-12 | 2016-08-10 | 宁德新能源科技有限公司 | Top cover for power battery |
| US10319960B2 (en) | 2015-01-12 | 2019-06-11 | Ningde Amperex Technology Limited | Cap assembly of power battery |
| CN105845848B (en) * | 2015-01-12 | 2019-07-12 | 宁德新能源科技有限公司 | Power battery top cover |
| CN110165094A (en) * | 2015-01-12 | 2019-08-23 | 宁德新能源科技有限公司 | Power battery top cover |
| US20160204397A1 (en) * | 2015-01-12 | 2016-07-14 | Ningde Amperex Technology Limited | Cap assembly of power battery |
| CN110165094B (en) * | 2015-01-12 | 2021-12-28 | 东莞新能安科技有限公司 | Power battery top cover |
| US11276896B2 (en) | 2015-01-12 | 2022-03-15 | Ningde Amperex Technology Limit Ed | Cap assembly of power battery |
| CN106920909A (en) * | 2015-12-25 | 2017-07-04 | 财团法人工业技术研究院 | Battery safety valve actuating structure |
| CN108075055A (en) * | 2016-11-16 | 2018-05-25 | 宁德时代新能源科技股份有限公司 | Power battery top cover structure and power battery |
| CN107248554A (en) * | 2017-06-27 | 2017-10-13 | 东莞塔菲尔新能源科技有限公司 | Top cover structure of power battery and electrokinetic cell |
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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: 1, 1F-, west of Fujian Road, Xingang Road, Zhangzhou Town, Jiaocheng District, Ningde, 352000 Patentee before: CONTEMPORARY AMPEREX TECHNOLOGY Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
|
| CX01 | Expiry of patent term |