CN102074671A - Battery explosion-proof device - Google Patents
Battery explosion-proof device Download PDFInfo
- Publication number
- CN102074671A CN102074671A CN2010106093406A CN201010609340A CN102074671A CN 102074671 A CN102074671 A CN 102074671A CN 2010106093406 A CN2010106093406 A CN 2010106093406A CN 201010609340 A CN201010609340 A CN 201010609340A CN 102074671 A CN102074671 A CN 102074671A
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- Prior art keywords
- explosion
- battery
- proof
- proof plug
- protective layer
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Links
- 239000011241 protective layer Substances 0.000 claims description 13
- 238000004880 explosion Methods 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011889 copper foil Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 239000004636 vulcanized rubber Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 239000005030 aluminium foil Substances 0.000 claims 1
- 229920002521 macromolecule Polymers 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920013635 phenyl ether polymer Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Gas Exhaust Devices For Batteries (AREA)
Abstract
本发明公开了一种电池防爆装置，其包括开设有防爆孔的电池顶盖和密封安装于防爆孔中的防爆塞。本发明电池防爆装置的结构简单紧凑，防爆压力易于控制，可显著改善电池的安全性能。
The invention discloses a battery explosion-proof device, which comprises a battery top cover with an explosion-proof hole and an explosion-proof plug sealed and installed in the explosion-proof hole. The battery explosion-proof device of the invention has a simple and compact structure, and the explosion-proof pressure is easy to control, which can significantly improve the safety performance of the battery.
Description
技术领域technical field
本发明涉及一种电池防爆装置，尤其是一种具有良好安全性能的电池防爆装置。The invention relates to a battery explosion-proof device, in particular to a battery explosion-proof device with good safety performance.
背景技术Background technique
目前，为了保证电池的安全使用，电池上通常都设有防爆装置。防爆装置为电池中的薄弱环节，当电池内部的气压增加到一定值时，防爆装置可以打开泄气，防止电池发生爆炸。At present, in order to ensure the safe use of the battery, the battery is usually provided with an explosion-proof device. The explosion-proof device is the weak link in the battery. When the air pressure inside the battery increases to a certain value, the explosion-proof device can be opened to vent the gas to prevent the battery from exploding.
现有的电池一般使用防爆阀、防爆膜、防爆针或防爆刻痕等，其原理大多是利用金属薄膜(如铜箔，铝箔等)在受到一定的压力下爆破，从而获得一定的安全性能。Existing batteries generally use explosion-proof valves, explosion-proof membranes, explosion-proof needles or explosion-proof notches, etc., and the principle is mostly to use metal films (such as copper foil, aluminum foil, etc.) to explode under certain pressure, thereby obtaining certain safety performance.
但是，现有电池的防爆装置至少存在以下缺陷：金属防爆膜长期置于电池内复杂的电化学环境中，因此容易受到化学腐蚀和电化学腐蚀并引发穿孔失效，影响了电池的安全使用。However, the explosion-proof devices of existing batteries have at least the following defects: the metal explosion-proof film is placed in the complex electrochemical environment in the battery for a long time, so it is vulnerable to chemical corrosion and electrochemical corrosion and causes perforation failure, which affects the safe use of the battery.
有鉴于此，确有必要提供一种具有良好安全性能的电池防爆装置。In view of this, it is indeed necessary to provide a battery explosion-proof device with good safety performance.
发明内容Contents of the invention
本发明的目的在于：提供一种具有良好安全性能的电池防爆装置。The purpose of the present invention is to provide a battery explosion-proof device with good safety performance.
为了实现上述目的，本发明提供了一种电池防爆装置，其包括开设有防爆孔的电池顶盖和密封安装于防爆孔中的防爆塞。In order to achieve the above object, the present invention provides a battery explosion-proof device, which includes a battery top cover with an explosion-proof hole and an explosion-proof plug sealed and installed in the explosion-proof hole.
作为本发明电池防爆装置的一种改进，所述防爆塞是由具有弹塑性的防腐材料制成。As an improvement of the battery explosion-proof device of the present invention, the explosion-proof plug is made of elastic-plastic anti-corrosion material.
作为本发明电池防爆装置的一种改进，所述防爆塞是由氟橡胶、硫化橡胶、苯醚类高分子材料制成。As an improvement of the battery explosion-proof device of the present invention, the explosion-proof plug is made of fluorine rubber, vulcanized rubber, and phenyl ether polymer materials.
作为本发明电池防爆装置的一种改进，所述防爆塞上设有一层可防止浸润和老化的柔性保护层。As an improvement of the battery explosion-proof device of the present invention, the explosion-proof plug is provided with a flexible protective layer that can prevent infiltration and aging.
作为本发明电池防爆装置的一种改进，所述柔性保护层是由金属薄膜制成。As an improvement of the battery explosion-proof device of the present invention, the flexible protective layer is made of metal film.
作为本发明电池防爆装置的一种改进，所述柔性保护层是由铝箔或铜箔制成。As an improvement of the battery explosion-proof device of the present invention, the flexible protective layer is made of aluminum foil or copper foil.
作为本发明电池防爆装置的一种改进，所述柔性保护层通过金属薄膜拉伸或者电解工艺成型。As an improvement of the battery explosion-proof device of the present invention, the flexible protective layer is formed by metal film stretching or electrolysis process.
作为本发明电池防爆装置的一种改进，所述防爆塞与所述电池顶盖之间的静摩擦力与电池的爆破压力相适配。As an improvement of the battery explosion-proof device of the present invention, the static friction force between the explosion-proof plug and the battery top cover is adapted to the explosion pressure of the battery.
相对于现有技术，本发明电池防爆装置的结构简单紧凑，防爆压力易于控制，可显著改善电池的安全性能。Compared with the prior art, the battery explosion-proof device of the invention has a simple and compact structure, and the explosion-proof pressure is easy to control, which can significantly improve the safety performance of the battery.
附图说明Description of drawings
下面结合附图和具体实施方式，详细说明本发明电池防爆装置及其有益技术效果。The battery explosion-proof device of the present invention and its beneficial technical effects will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
图1为本发明电池防爆装置的剖视示意图。Fig. 1 is a schematic cross-sectional view of a battery explosion-proof device of the present invention.
具体实施方式Detailed ways
请参阅图1所示，本发明电池防爆装置10可安装于电池的电池壳体(未图示)上，用于改善电池的安全性能，其包括设有防爆孔202的电池顶盖20和密封安装于防爆孔202中的防爆塞30。Referring to Fig. 1, the battery explosion-proof device 10 of the present invention can be installed on the battery case (not shown) of the battery to improve the safety performance of the battery, which includes a battery top cover 20 with an explosion-proof hole 202 and a sealing The explosion-proof plug 30 installed in the explosion-proof hole 202 .
电池顶盖20是由不锈钢材料制成，其上设有防爆孔202。与现有电池的结构不同，在图示实施方式中，防爆孔202同时可以充当注液孔，因此可以减少电池顶盖20上的开孔数量，改善电池的密封性能。The battery top cover 20 is made of stainless steel and is provided with an explosion-proof hole 202 . Different from the structure of the existing battery, in the illustrated embodiment, the explosion-proof hole 202 can serve as a liquid injection hole at the same time, so the number of openings on the battery top cover 20 can be reduced, and the sealing performance of the battery can be improved.
防爆塞30是由具有良好弹性和耐腐蚀性的材料制成，根据本发明的一个优选实施方式，防爆塞30是由氟橡胶、硫化橡胶或苯醚类高分子材料制成。防爆塞30的具体成型工艺没有特别限制，可以通过注射成型，也可以通过压塑成型，还可以通过机械切割成型。The explosion-proof plug 30 is made of a material with good elasticity and corrosion resistance. According to a preferred embodiment of the present invention, the explosion-proof plug 30 is made of fluororubber, vulcanized rubber or phenyl ether polymer material. The specific molding process of the explosion-proof plug 30 is not particularly limited, and it can be formed by injection molding, compression molding, or mechanical cutting.
为了预防防爆塞30的浸润和老化，防爆塞30的表面包覆一层可防止浸润和老化的柔性保护层40。根据本发明的一个优选实施方式，柔性保护层40为金属薄膜层，如铝箔或铜箔，柔性保护层40可通过卡口钳包覆于防爆塞30的表面。根据本发明的一个优选实施方式，柔性保护层40可以通过金属薄膜拉伸或者电解工艺成型，拉伸是指将金属片经过辊筒或辊压机压缩成需要的厚度，电解是指在电解液中使离子还原并吸附在防爆塞30上。In order to prevent the wetting and aging of the explosion-proof plug 30 , the surface of the explosion-proof plug 30 is covered with a flexible protective layer 40 which can prevent wetting and aging. According to a preferred embodiment of the present invention, the flexible protective layer 40 is a metal thin film layer, such as aluminum foil or copper foil, and the flexible protective layer 40 can be covered on the surface of the explosion-proof plug 30 by bayonet pliers. According to a preferred embodiment of the present invention, the flexible protective layer 40 can be formed by metal film stretching or electrolysis process. Stretching refers to compressing the metal sheet to the required thickness through rollers or roller presses. The ions are reduced and adsorbed on the explosion-proof plug 30.
在电池的制备过程中，首先，将电芯(未图示)置于电池壳体中；其次，通过电池顶盖20上开设的防爆孔202向电池壳体内灌注电解液，并将电池顶盖20密封安装于电池壳体上；再次，用防爆塞30密封塞住防爆孔202，随后化成；然后，拔开防爆塞30，排气和抽真空；最后，塞上防爆塞30，并用卡口钳把外包装柔性保护层40封固。In the preparation process of the battery, firstly, the battery cell (not shown) is placed in the battery case; secondly, the electrolyte solution is poured into the battery case through the explosion-proof hole 202 opened on the battery top cover 20, and the battery top cover 20 is sealed and installed on the battery case; again, seal the explosion-proof hole 202 with the explosion-proof plug 30, and then form; then, unplug the explosion-proof plug 30, exhaust and vacuumize; finally, plug the explosion-proof plug 30, and use the bayonet The pliers seal the flexible protective layer 40 of the outer packaging.
当防爆塞30塞入防爆孔202中时，防爆塞30的外表面与围绕防爆孔202的电池顶盖20之间产生静摩擦力，静摩擦力可以根据电池的爆破压力计算确定，即通过电池的最大爆破压强和防爆塞30的横截面积换算出静态摩擦力。防爆塞30在防爆孔202中具有良好的密封性，在爆破之前，应当可以保证电池内部的气体和液体不泄漏。When the explosion-proof plug 30 is inserted into the explosion-proof hole 202, a static friction force is generated between the outer surface of the explosion-proof plug 30 and the battery top cover 20 around the explosion-proof hole 202, and the static friction force can be determined according to the burst pressure of the battery, that is, through the maximum pressure of the battery The static friction force is obtained by converting the burst pressure and the cross-sectional area of the explosion-proof plug 30 . The explosion-proof plug 30 has good sealing performance in the explosion-proof hole 202, and it should be able to ensure that the gas and liquid inside the battery do not leak before the explosion.
当电池处于正常工作状态时，电池内部的压力小于防爆塞30与电池顶盖20之间的静摩擦力，此时，依靠防爆塞30和电池顶盖20之间的静摩擦力，电池内部与外部密封隔绝。当电池内部的压力达到或者超过防爆塞30和电池顶盖20之间的静摩擦力时，防爆塞30会被顶开，电池内部的气体压力得以释放，因此可以防止电池发生爆炸等安全事故。When the battery is in normal working condition, the pressure inside the battery is less than the static friction force between the explosion-proof plug 30 and the battery top cover 20. At this time, relying on the static friction force between the explosion-proof plug 30 and the battery top cover 20, the inside and outside of the battery are sealed isolated. When the pressure inside the battery reaches or exceeds the static friction between the explosion-proof plug 30 and the battery top cover 20, the explosion-proof plug 30 will be pushed open, and the gas pressure inside the battery can be released, thus preventing battery explosion and other safety accidents.
此外，如果电芯短路产生的高温超过400℃时，防爆塞30会变软流动或熔融，防爆孔202也会自动打开，可以达到防爆的目的。In addition, if the high temperature generated by the short circuit of the cell exceeds 400° C., the explosion-proof plug 30 will soften and flow or melt, and the explosion-proof hole 202 will automatically open, which can achieve the purpose of explosion-proof.
结合上面的详细描述可以看出，相对于现有技术，本发明电池防爆装置10具有以下优点：1)结构简单紧凑，防爆压力易于控制，可显著改善电池的安全性能；2)耐电解液腐蚀，气密性好，防爆可靠，使用寿命长；3)注液孔和防爆孔合二为一，防爆塞30安装在注液孔上，减少了电池顶盖20上的开孔，改善了电池的密封性能；4)防爆塞30可以实时更换，方便回收利用，避免了因成品电池防爆膜腐蚀报废造成的浪费。In combination with the above detailed description, it can be seen that compared with the prior art, the battery explosion-proof device 10 of the present invention has the following advantages: 1) the structure is simple and compact, the explosion-proof pressure is easy to control, and the safety performance of the battery can be significantly improved; 2) it is resistant to electrolyte corrosion , good air tightness, explosion-proof and reliable, long service life; 3) The liquid injection hole and the explosion-proof hole are combined into one, and the explosion-proof plug 30 is installed on the liquid injection hole, which reduces the openings on the battery top cover 20 and improves the battery life. 4) The explosion-proof plug 30 can be replaced in real time, which is convenient for recycling and avoids the waste caused by the corrosion and scrapping of the explosion-proof film of the finished battery.
根据上述说明书的揭示和教导，本发明所属领域的技术人员还可以对上述实施方式进行适当的变更和修改。因此，本发明并不局限于上面揭示和描述的具体实施方式，对本发明的一些修改和变更也应当落入本发明的权利要求的保护范围内。此外，尽管本说明书中使用了一些特定的术语，但这些术语只是为了方便说明，并不对本发明构成任何限制。According to the disclosure and teaching of the above specification, those skilled in the art to which the present invention pertains can also make appropriate changes and modifications to the above embodiment. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010609340.6A CN102074671B (en) | 2010-12-28 | 2010-12-28 | Explosion-proof device for battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010609340.6A CN102074671B (en) | 2010-12-28 | 2010-12-28 | Explosion-proof device for battery |
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| Publication Number | Publication Date |
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| CN102074671A true CN102074671A (en) | 2011-05-25 |
| CN102074671B CN102074671B (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010609340.6A Active CN102074671B (en) | 2010-12-28 | 2010-12-28 | Explosion-proof device for battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700515A (en) * | 2013-12-27 | 2014-04-02 | 亚欧益盟科技（北京）有限公司 | Supercapacitor |
| CN105719839A (en) * | 2016-04-06 | 2016-06-29 | 亚欧益盟科技（北京）有限公司 | Capacitor |
| CN113488692A (en) * | 2021-08-09 | 2021-10-08 | 东莞市电的电子有限公司 | Button cell explosion-proof sealing structure, button cell and packaging method thereof |
| WO2023045401A1 (en) * | 2021-09-27 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Electrolyte injection hole sealing apparatus, end cover assembly, battery cell, battery, and electrical device |
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| CN1610799A (en) * | 2001-11-22 | 2005-04-27 | Nok株式会社 | Pressure release valve |
| CN2701082Y (en) * | 2004-06-01 | 2005-05-18 | 肇庆市风华锂电池有限公司 | Battery security sealing stopper and sealing cover plate and battery thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201562718U (en) * | 2009-10-09 | 2010-08-25 | 深圳市比克电池有限公司 | Battery with new pressure protection device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610799A (en) * | 2001-11-22 | 2005-04-27 | Nok株式会社 | Pressure release valve |
| CN2701082Y (en) * | 2004-06-01 | 2005-05-18 | 肇庆市风华锂电池有限公司 | Battery security sealing stopper and sealing cover plate and battery thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700515A (en) * | 2013-12-27 | 2014-04-02 | 亚欧益盟科技（北京）有限公司 | Supercapacitor |
| CN105719839A (en) * | 2016-04-06 | 2016-06-29 | 亚欧益盟科技（北京）有限公司 | Capacitor |
| CN113488692A (en) * | 2021-08-09 | 2021-10-08 | 东莞市电的电子有限公司 | Button cell explosion-proof sealing structure, button cell and packaging method thereof |
| WO2023045401A1 (en) * | 2021-09-27 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Electrolyte injection hole sealing apparatus, end cover assembly, battery cell, battery, and electrical device |
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| Publication number | Publication date |
|---|---|
| CN102074671B (en) | 2016-07-27 |
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