Battery end cover with fire extinguishing function

A battery and end cap technology, applied in the direction of battery cover/end cap, battery pack parts, battery box/coat, etc.

Pending Publication Date: 2019-11-01
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a battery end cover with fire exti

Method used

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  • Battery end cover with fire extinguishing function
  • Battery end cover with fire extinguishing function
  • Battery end cover with fire extinguishing function

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Embodiment Construction

[0053] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0054] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" ment...

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Abstract

The invention relates to a battery end cover with the fire extinguishing function. The battery end cover comprises a cover body and a fuse group. A fire extinguishing agent cavity is formed in cover body. A first fuse and a second fuse are oppositely arranged in the fire extinguishing agent cavity at intervals. When the pressure in the battery cavity rises, the surface, close to the battery cavity, of the battery end cover is extruded to push the first fuse to gradually get close to the second fuse. The first fuse is electrically connected with a negative current collector, and the first fuseis positively charged. The second fuse is electrically connected with a positive electrode current collector, and the second fuse is negatively charged. When the first fuse and the second fuse are incontact, the first fuse and the second fuse are short-circuited to release heat. A fire extinguishing agent is heated to generate chemical reaction to generate a flame-retardant gas. The flame-retardant gas can prevent gas in the battery from burning. The flame-retardant gas breaks through the cover body, so that the gas in the battery cavity is discharged. The explosion probability is reduced.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to a battery end cover with a fire extinguishing function. Background technique [0002] Lithium batteries will experience thermal runaway under various incentives. During the process of thermal runaway, the lithium battery will expand, deflate or even burn. The high-temperature smoke released by the thermal runaway of the battery cell spreads in the battery pack, causing the thermal runaway to spread to the adjacent battery cells, resulting in the thermal runaway of the entire module and even the battery pack. [0003] The thermal runaway of the battery pack leads to combustion or even explosion, causing loss of life and property. How to improve the safety of batteries is an urgent problem to be solved. Contents of the invention [0004] Based on this, it is necessary to provide a battery end cover with a fire extinguishing function to address the issue of how to i...

Claims

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Application Information

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IPC IPC(8): H01M2/04H01M2/12A62C3/16
CPCA62C3/16H01M50/147H01M50/3425Y02E60/10
Inventor 张亚军王贺武李伟峰李成欧阳明高李建秋卢兰光杜玖玉韩雪冰冯旭宁
Owner TSINGHUA UNIV
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