CN108198967B - Power battery and top cover structure thereof - Google Patents
Power battery and top cover structure thereof Download PDFInfo
- Publication number
- CN108198967B CN108198967B CN201711454884.8A CN201711454884A CN108198967B CN 108198967 B CN108198967 B CN 108198967B CN 201711454884 A CN201711454884 A CN 201711454884A CN 108198967 B CN108198967 B CN 108198967B
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- Prior art keywords
- top cover
- explosion
- pressure value
- valve body
- power battery
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- 239000011248 coating agent Substances 0.000 claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 48
- 239000011230 binding agent Substances 0.000 claims abstract description 23
- 239000000853 adhesive Substances 0.000 claims description 25
- 230000001070 adhesive effect Effects 0.000 claims description 25
- 238000004880 explosion Methods 0.000 claims description 18
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000001467 acupuncture Methods 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 238000009783 overcharge test Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a top cover structure of a power battery, which comprises a top cover body, wherein a positive pole, a negative pole and an explosion-proof valve body are arranged on the top cover body, the positive pole is kept in a power-on state with the top cover body, the negative pole is kept in an insulation state with the top cover body, the negative pole is provided with a short-circuit protection structure, and when the pressure value inside the power battery reaches a preset pressure value, the short-circuit protection structure can short-circuit the negative pole with the top cover body; the explosion-proof valve body is provided with a binder coating for preventing the explosion-proof valve body from being opened, the opening pressure value of the explosion-proof valve body is smaller than a preset pressure value, and the opening pressure value of the combined action of the explosion-proof valve body and the binder coating is larger than the preset pressure value of the negative short-circuit protection structure. Above-mentioned top cap structure when satisfying the test demand of overcharging, has still avoided producing the problem that catches fire, explode even during the acupuncture test. In addition, the invention also discloses a power battery.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a power battery and a top cover structure thereof.
Background
The power battery is a power source for providing power for the tool, and is a storage battery for providing power for electric vehicles, electric trains, electric bicycles, golf carts and the like. The general requirement of power battery's top cap structure satisfies the overcharge test, but the top cap of present safety design is satisfying under the circumstances of overcharge test, is difficult to the test requirement through the acupuncture project, and the leading cause is for through the overcharge project, adopts the explosion-proof valve of big pressure value to there is sufficient time to let the connection piece of short-circuit current fusing anodal post and naked electric core anodal ear department. However, due to the adoption of the explosion-proof valve with a large pressure value, a large amount of heat and pressure can be accumulated in the power battery during the acupuncture test, and the heat and the pressure are not discharged in time, so that the problem that the battery is ignited or even explodes is easily caused.
In summary, how to solve the problem that the power battery top cover structure is easy to catch fire or even explode during the needle test after meeting the overcharge test has become a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a power battery and a top cover structure thereof, which are used for solving the problem that the top cover structure of the power battery meets the overcharge test and simultaneously avoids the problems of fire and even explosion during the acupuncture test.
In order to achieve the purpose, the invention provides a top cover structure of a power battery, which comprises a top cover body, wherein a positive pole which is kept in a power-on and conduction state with the top cover body, a negative pole which is kept in an insulation state with the top cover body and an explosion-proof valve body are arranged on the top cover body,
the negative pole column is provided with a short-circuit protection structure, and when the pressure value inside the power battery reaches a preset pressure value, the short-circuit protection structure can short-circuit the negative pole column and the top cover body;
the explosion-proof valve body is provided with a binder coating for preventing the explosion-proof valve body from being opened, the opening pressure value of the explosion-proof valve body is smaller than the preset pressure value, and the opening pressure value of the combined action of the explosion-proof valve body and the binder coating is larger than the preset pressure value;
the adhesive coating is in a solid state in a normal state and has the function of preventing the explosion-proof valve body from being opened; when the binder coating reaches a preset temperature value, the binder coating can be softened and lose the function of preventing the explosion-proof valve body from opening.
Preferably, the preset temperature value is 75-150 ℃.
Preferably, the binder coating is a binder coating made of a hydrocarbon mixture.
Preferably, the adhesive coating is made of resin.
Preferably, the adhesive coating is made of a polymer.
Preferably, the explosion-proof valve body comprises an explosion-proof valve film fixedly arranged on the top cover body, a reticle is arranged in the middle of the explosion-proof valve film, and the limit bearing pressure value of the reticle corresponds to the opening pressure value of the explosion-proof valve body.
Preferably, a protective patch is arranged above the explosion-proof valve membrane and used for protecting a scribed line on the explosion-proof valve membrane.
Preferably, the adhesive coating is disposed between the protective patch and the explosion-proof valve membrane.
Compared with the introduction content of the background art, the top cover structure of the power battery comprises a top cover body, wherein a positive pole which is kept in a power-on state with the top cover body, a negative pole which is kept in an insulation state with the top cover body and an explosion-proof valve body are arranged on the top cover body, a short-circuit protection structure is arranged on the negative pole, and when the pressure value inside the power battery reaches a preset pressure value, the short-circuit protection structure can short-circuit the negative pole with the top cover body; the explosion-proof valve body is provided with a binder coating for preventing the explosion-proof valve body from being opened, the opening pressure value of the explosion-proof valve body is smaller than a preset pressure value, and the opening pressure value of the combined action of the explosion-proof valve body and the binder coating is larger than the preset pressure value; in a normal state, the adhesive coating is in a solid state and has the function of preventing the explosion-proof valve body from being opened; when the adhesive coating reaches a preset temperature value, the adhesive coating can be softened and lose the function of preventing the explosion-proof valve body from opening. During the overcharge test, the binder coating is in a normal state, so that the explosion-proof valve body is prevented from being opened, the opening pressure of the corresponding explosion-proof valve body under the combined action of the explosion-proof valve body and the binder coating is greater than a preset pressure value, sufficient pressure can be accumulated in the battery, the short circuit between the negative pole column and the top cover body is triggered, the positive pole column is always kept in a power-on conduction state with the top cover body, the positive pole and the negative pole of the battery are in short circuit, and the short circuit current fuses the connecting sheet between the positive pole column and the bare cell in the battery, so that the purpose of protecting the power battery through overcharge is achieved; when carrying out the acupuncture test, because the battery generates heat, when the temperature reaches preset temperature value, the binder coating begins to soften, lose the effect that prevents explosion-proof valve body and open then, and then make the explosion-proof valve body's that corresponds this moment the pressure value of opening reduce, can open when the pressure value reaches explosion-proof valve body self the pressure value of opening, and then can in time release power battery's inside pressure and heat, thereby produce the problem of catching fire, even explosion when having avoided the acupuncture test, the purpose of protection battery has been played.
In addition, the invention also provides a power battery, which comprises a top cover structure, wherein the top cover structure is the top cover structure of the power battery described in any scheme. Because the top cover structure of the power battery has the technical effects, the power battery with the top cover structure also has the corresponding technical effects, which are not described herein again.
Drawings
Fig. 1 is a schematic overall structural diagram of a top cover structure of a power battery provided in an embodiment of the present invention;
fig. 2 is an exploded schematic view of a top cover structure of a power battery according to an embodiment of the present invention;
fig. 3 is a schematic view of an overall structure of a power battery according to an embodiment of the present invention.
In the above figures 1-3 of the drawings,
the explosion-proof valve comprises a top cover body 1, a negative pole column 2, a positive pole column 3, an explosion-proof valve body 4, a binder coating 5, a protection patch 6, an explosion-proof valve membrane 7, a negative pole connecting sheet 8, a positive pole connecting sheet 9, a negative pole output end 10, a positive pole output end 11, a short-circuit protection structure 12 and a shell 13.
Detailed Description
The core of the invention is to provide a power battery and a top cover structure thereof, so that the top cover structure of the power battery meets the over-charge test and simultaneously avoids the problems of fire and even explosion during the acupuncture test.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to fig. 3, a top cover structure of a power battery provided in an embodiment of the present invention includes a top cover body 1, a positive post 3 that maintains an energized state with the top cover body 1, a negative post 2 that maintains insulation with the top cover body 1, and an explosion-proof valve body 4 are disposed on the top cover body 1, a short-circuit protection structure 12 is disposed on the negative post 2, and when a pressure value inside the power battery reaches a preset pressure value, the short-circuit protection structure 12 can short-circuit the negative post 2 and the top cover body 1; the anti-explosion valve body 4 is provided with a binder coating 5 for preventing the anti-explosion valve body 4 from opening, the opening pressure value of the anti-explosion valve body 4 is smaller than a preset pressure value, and the opening pressure value of the combined action of the anti-explosion valve body 4 and the binder coating 5 is larger than the preset pressure value; in a normal state, the adhesive coating 5 is in a solid state and has the function of preventing the explosion-proof valve body 4 from being opened; when the adhesive coating 5 reaches a preset temperature value, the adhesive coating can soften and lose the function of preventing the explosion-proof valve body 4 from opening.
When the overcharge test is carried out, the binder coating is in a normal state, so that the explosion-proof valve body is prevented from being opened, the opening pressure of the corresponding explosion-proof valve body under the combined action of the explosion-proof valve body and the binder coating is greater than a preset pressure value, so that sufficient pressure can be accumulated in the battery, the short circuit between the negative pole column and the top cover body is triggered, the positive pole column is always kept in a power-on conduction state with the top cover body, the positive pole and the negative pole of the battery are in short circuit, and the short circuit current fuses the connecting sheet between the positive pole column and the bare cell in the battery, so that the purpose of protecting the power battery by overcharge is; when carrying out the acupuncture test, because the battery generates heat, when the temperature reaches preset temperature value, the binder coating begins to soften, lose the effect that prevents explosion-proof valve body and open then, and then make the explosion-proof valve body's that corresponds this moment the pressure value of opening reduce, can open when the pressure value reaches explosion-proof valve body self the pressure value of opening, and then can in time release power battery's inside pressure and heat, thereby produce the problem of catching fire, even explosion when having avoided the acupuncture test, the purpose of protection battery has been played.
It should be noted that, as will be understood by those skilled in the art, in order to enable the normal production and use of the power battery, the opening pressure value of the explosion-proof valve body 4 itself should be greater than the internal pressure value during the normal manufacturing and normal use of the battery; and as will be understood by those skilled in the art, in order to prevent the housing 13 of the power battery from being subjected to overload pressure, the opening pressure value of the explosion-proof valve body 4 and the adhesive coating 5 is generally smaller than the bearing pressure value of the top cover body 1 welded to the housing 13, so that the housing 13 of the power battery can be protected. In addition, it should be noted that, as well known to those skilled in the art, a positive electrode connecting piece 9 is correspondingly connected to the positive electrode post 3, and the positive electrode connecting piece 9 is used for connecting with a positive electrode tab of a bare cell inside the battery; the negative pole post 2 is correspondingly connected with a negative pole connecting piece 8, and the negative pole connecting piece 8 is used for being connected with a bare cell negative pole lug inside the battery. And generally, a positive output end 11 connected with the positive post 3 and a negative output end 10 connected with the negative post 2 are also arranged on the top cover body.
In some embodiments, the predetermined temperature is generally selected to be in the range of 75-150 ℃. It can be understood that the preset temperature value may also be selected from other corresponding temperature values, and in the actual application process, the preset temperature value may be set according to the softening temperature corresponding to the material of the adhesive coating. The binder coating 5 may be a binder coating made of a hydrocarbon mixture; the adhesive coating 5 can also be made of resin; alternatively, the adhesive coating 5 is an adhesive coating made of a polymer.
In addition, it should be noted that the specific structure of the explosion-proof valve body 4 may include an explosion-proof valve film 7 fixedly disposed on the top cover body 1, a reticle is disposed in the middle of the explosion-proof valve film 7, and an ultimate bearing pressure value of the reticle corresponds to an opening pressure value of the explosion-proof valve body 4 itself. It should be noted that, as well known to those skilled in the art, the scribing line is a scratch mark made on the explosion-proof valve membrane 7 to a certain depth, so that the strength of the position corresponding to the scratch mark is weakened, and the position is easy to open. It is understood that the structure of the explosion-proof valve body is only a preferred example of the structure of the explosion-proof valve body according to the embodiment of the present invention, and may be other structures of the explosion-proof valve body commonly used by those skilled in the art as long as the basic function of the explosion-proof valve body can be achieved.
In some more specific embodiments, in order to prevent dust or impurities from falling onto the score line of the explosion-proof valve membrane 7 and affecting the performance of the score line, and also to avoid the problem of score line failure caused by careless touch on the score line, a protective patch 6 is arranged above the explosion-proof valve membrane 7, and the protective patch 6 can protect the score line on the explosion-proof valve membrane 7.
In a further embodiment, the adhesive coating 5 is disposed generally between the protective patch 6 and the burst valve membrane 7. It is understood that, in practical application, the adhesive coating may be disposed on the inner side of the explosion-proof valve membrane 7, as long as the effect that the explosion-proof valve membrane of the explosion-proof valve body is kept from opening in a solid state and loses the effect of preventing the explosion-proof valve membrane from opening after being softened is achieved.
In addition, the invention also provides a power battery, which comprises a top cover structure, wherein the top cover structure is the top cover structure of the power battery described in any scheme. Because the top cover structure of the power battery has the technical effects, the power battery with the top cover structure also has the corresponding technical effects, which are not described herein again.
The power battery and the top cover structure thereof provided by the invention are described in detail above. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (6)
1. A top cover structure of a power battery comprises a top cover body (1), wherein a positive pole (3) which is kept in a power-on and conduction state with the top cover body (1), a negative pole (2) which is kept insulated with the top cover body (1) and an explosion-proof valve body (4) are arranged on the top cover body (1),
the negative pole column (2) is provided with a short-circuit protection structure (12), and when the pressure value inside the power battery reaches a preset pressure value, the short-circuit protection structure (12) can short-circuit the negative pole column (2) and the top cover body (1);
the anti-explosion valve comprises a top cover body (1), and is characterized in that an adhesive coating (5) for preventing the anti-explosion valve body (4) from being opened is arranged on the anti-explosion valve body (4), the anti-explosion valve body (4) comprises an anti-explosion valve film (7) fixedly arranged on the top cover body (1), a scribed line is arranged in the middle of the anti-explosion valve film (7), the limit bearing pressure value of the scribed line corresponds to the opening pressure value of the anti-explosion valve body (4), a protective patch (6) is arranged above the anti-explosion valve film (7), the protective patch (6) is used for protecting the scribed line on the anti-explosion valve film (7), and the adhesive coating (5) is arranged between the protective patch (6) and the anti-explosion valve film (7); the opening pressure value of the explosion-proof valve body (4) is smaller than the preset pressure value, and the opening pressure value of the combined action of the explosion-proof valve body (4) and the binder coating (5) is larger than the preset pressure value; the opening pressure value of the combined action of the explosion-proof valve body (4) and the binder coating (5) is smaller than the bearing pressure value of the top cover body (1) welded to the shell (13);
in a normal state, the adhesive coating (5) is in a solid state and has the function of preventing the explosion-proof valve body (4) from being opened; when the adhesive coating (5) reaches a preset temperature value, the adhesive coating can be softened and lose the function of preventing the explosion-proof valve body (4) from opening.
2. The top cover structure of the power battery as claimed in claim 1, wherein the preset temperature value is 75-150 ℃.
3. The top cover structure of the power battery according to claim 1, wherein the adhesive coating (5) is made of a hydrocarbon mixture.
4. The top cover structure of the power battery according to claim 1, wherein the adhesive coating (5) is made of resin.
5. The top cover structure of the power battery as claimed in claim 1, wherein the adhesive coating (5) is made of polymer.
6. A power battery comprising a top cover structure, wherein the top cover structure is the top cover structure of the power battery according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711454884.8A CN108198967B (en) | 2017-12-28 | 2017-12-28 | Power battery and top cover structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711454884.8A CN108198967B (en) | 2017-12-28 | 2017-12-28 | Power battery and top cover structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108198967A CN108198967A (en) | 2018-06-22 |
| CN108198967B true CN108198967B (en) | 2021-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711454884.8A Active CN108198967B (en) | 2017-12-28 | 2017-12-28 | Power battery and top cover structure thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN108198967B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201562701U (en) * | 2009-11-13 | 2010-08-25 | 天津锦泰勤业精密电子有限公司 | Explosion-proof cover structure for lithium ion battery |
| CN103247767A (en) * | 2012-02-14 | 2013-08-14 | 株式会社杰士汤浅国际 | Electric storage device |
| CN203617357U (en) * | 2013-12-19 | 2014-05-28 | 浙江正电新能源有限公司 | Bursting disk device for lithium ion battery cover plate |
| CN105206773A (en) * | 2015-09-24 | 2015-12-30 | 浙江谷神能源科技股份有限公司 | Lithium-ion battery safety valve and machining method thereof |
| CN105470431A (en) * | 2014-09-12 | 2016-04-06 | 宁德时代新能源科技股份有限公司 | Battery and explosion-proof device thereof |
| CN205846036U (en) * | 2016-07-15 | 2016-12-28 | 东莞永蓝电子科技有限公司 | A kind of electrokinetic cell top cover and use the electrokinetic cell of this top cover |
| CN205992561U (en) * | 2016-01-21 | 2017-03-01 | 深圳市科达利实业股份有限公司 | The cover plate of electrokinetic cell and electrokinetic cell |
| CN206098477U (en) * | 2016-10-27 | 2017-04-12 | 慈晟 | Battery apron with duplicate protection function |
-
2017
- 2017-12-28 CN CN201711454884.8A patent/CN108198967B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201562701U (en) * | 2009-11-13 | 2010-08-25 | 天津锦泰勤业精密电子有限公司 | Explosion-proof cover structure for lithium ion battery |
| CN103247767A (en) * | 2012-02-14 | 2013-08-14 | 株式会社杰士汤浅国际 | Electric storage device |
| CN203617357U (en) * | 2013-12-19 | 2014-05-28 | 浙江正电新能源有限公司 | Bursting disk device for lithium ion battery cover plate |
| CN105470431A (en) * | 2014-09-12 | 2016-04-06 | 宁德时代新能源科技股份有限公司 | Battery and explosion-proof device thereof |
| CN105206773A (en) * | 2015-09-24 | 2015-12-30 | 浙江谷神能源科技股份有限公司 | Lithium-ion battery safety valve and machining method thereof |
| CN205992561U (en) * | 2016-01-21 | 2017-03-01 | 深圳市科达利实业股份有限公司 | The cover plate of electrokinetic cell and electrokinetic cell |
| CN205846036U (en) * | 2016-07-15 | 2016-12-28 | 东莞永蓝电子科技有限公司 | A kind of electrokinetic cell top cover and use the electrokinetic cell of this top cover |
| CN206098477U (en) * | 2016-10-27 | 2017-04-12 | 慈晟 | Battery apron with duplicate protection function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108198967A (en) | 2018-06-22 |
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Effective date of registration: 20240425 Address after: 315201 No. 1818, Zhong Guan Xi Road, Zhuang City Street, Zhenhai District, Ningbo, Zhejiang. Patentee after: NINGBO GRAPHENE INNOVATION CENTER Co.,Ltd. Country or region after: China Address before: 315201, No. 519, Zhuang Avenue, Zhenhai District, Zhejiang, Ningbo Patentee before: NINGBO INSTITUTE OF MATERIALS TECHNOLOGY & ENGINEERING, CHINESE ACADEMY OF SCIENCES Country or region before: China |