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An explosion-proof battery

A battery and battery module technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problems of thermal failure of parts, neglect of thermal energy, and inability to control the release of explosion heat to the outside, to block heat release and combustion. Effect

Active Publication Date: 2021-11-30
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant found that this solution ignores the heat energy carried by the shock wave. When the heat energy is brought to the outside of the box, due to the release of chemical energy, the energy is extremely high, which will cause other peripheral parts of the battery box to fail due to heat, and then burn. Although there is no Explosion, but still unable to prevent the car from igniting rapidly
[0006] Therefore, the improvements made to the explosion-proof battery box in the prior art cannot effectively control the explosion shock wave, and cannot control the problem of the outward release of heat generated by the explosion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0070] The composition and parts of the box cover, box body and protective box body, cover body, active gas and inert gas in the explosion-proof battery box body of embodiment 1-8 are as shown in the following table:

[0071]

experiment example

[0081] The product prepared by embodiment 1-8 and the product provided by comparative example 1-4 are carried out short-circuit explosion test, and test result is shown in the following table:

[0082]

[0083] From the data in the above table, it can be seen that compared with the aluminum alloy battery box and the carbon fiber composite battery box, Examples 1-8 have improved the explosion-proof effect to varying degrees, and Example 4 has the best effect. It is still possible to ensure that the overall box body is slightly deformed and free from cracks. Therefore, the explosion-proof battery box body of the present invention can achieve an explosion-proof effect.

[0084] One or more technical solutions in the embodiments of the present invention also have at least the following technical effects or advantages:

[0085] (1) In the embodiment of the present invention, the module protection box structure is adopted in the battery box, and when a single cell thermal runaway...

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PUM

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Abstract

The invention particularly relates to an explosion-proof battery, which belongs to the field of battery explosion-proof technology, and includes a box body and several battery modules. The raw materials include carborane-containing compounds. When the battery module placed in the box undergoes severe heat generation, since the raw material of the box is a carborane composite material, the carbosilane and the active gas react to produce ceramics. The material makes the box ceramicized, effectively blocking the heat release and combustion of the battery module. The embodiment of the present invention overcomes the current technical prejudice on battery explosion-proof and flame-retardant, and provides a new idea for battery explosion-proof and flame-retardant.

Description

technical field [0001] The invention belongs to the field of battery explosion-proof technology, and in particular relates to an explosion-proof battery. Background technique [0002] At present, the commonly used batteries on the market mainly include lithium iron phosphate batteries and ternary lithium batteries, namely square batteries and cylindrical batteries. Due to the higher energy density of ternary lithium batteries, higher mileage can be achieved. Existing electric vehicles Most use ternary lithium batteries. However, the ternary lithium battery is composed of hundreds of small cylindrical batteries in series, and each small battery may fail. [0003] The explosion of the battery is mainly caused by long-term overcharging of the battery cell or the external physical pressure of the battery. In the event of an explosion, the temperature can reach up to 70 to 800 degrees, and the box body is directly melted. At the same time, the shock wave generated by the explos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/227H01M10/658C08L61/06C08L51/06C08L83/04C08L27/18C08L63/00C08K7/10C08K7/14
CPCC08L61/06C08L63/00H01M10/658C08L51/06C08L83/04C08L27/18C08K7/10C08K7/14Y02E60/10
Inventor 高祥达邢俊亚熊芬巩西琛黄硕
Owner DONGFENG MOTOR CORP HUBEI
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