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Anti-overcharge battery pack device

An overcharging and anti-overcharging technology, applied in secondary batteries, secondary battery charging/discharging, secondary battery repair/maintenance, etc., can solve problems such as fire accidents, heat accumulation and thermal runaway, and achieve high safety , Prevent overcharging, good anti-overcharging effect

Pending Publication Date: 2021-04-06
SHANGHAI AEROSPACE POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If single or multiple batteries are overcharged, the heat accumulation caused by rapidly increasing heat generation and less heat dissipation will significantly increase the risk of thermal runaway, and serious fire accidents will occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] First prepare 1.0mol / L LiPF6 / EC+DEC (1:1wt%) common electrolyte, then add 1% by mass percentage of 1,4-di-tert-butyl-2,5-dimethoxy to the electrolyte Base benzene and 3% triphenyl phosphate additive in mass percent. The above-mentioned electrolyte solution was injected into a square aluminum shell battery with lithium iron phosphate / graphite as the main material of the positive and negative electrodes to make a fresh lithium iron phosphate single battery, and assembled into a battery box 2 with a specification of 217.6V100Ah.

Embodiment 2

[0066] First prepare 1.0mol / L LiPF6 / EC+DEC (1:1wt%) common electrolyte, then add 1% by mass percentage of 1,4-di-tert-butyl-2,5-dimethoxy to the electrolyte Base benzene and 3% triphenyl phosphate additive in mass percent. The above electrolyte is injected into a square aluminum shell battery with lithium iron phosphate / graphite as the main material of the positive and negative electrodes to make a fresh lithium iron phosphate single battery, which is assembled into a 4U battery box with a specification of 51.2V100Ah.

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PUM

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Abstract

The invention discloses an anti-overcharge battery pack device, which comprises a battery box and a battery management system, wherein the battery box is electrically connected with the battery management system, the battery box comprises a plurality of single batteries, the battery management system acquires state information of the battery box in real time and controls charging and discharging of the battery box according to the state information, and an anti-overcharging additive is added into electrolyte of the single batteries. According to the anti-overcharge battery pack device, the overcharge safety of the battery pack device is ensured from multiple aspects of electrolyte components of the single batteries, functions of a battery management system and the like, and fire and explosion during overcharge of one or more single batteries are prevented.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to an anti-overcharge battery pack device. Background technique [0002] In recent years, due to the continuous advancement of lithium-ion battery technology, its application range has become wider and wider. With the increase in the application of lithium-ion batteries, its safety issues are becoming more and more prominent. In the case of battery management system voltage detection failure or high-voltage contactor bonding, the probability of overcharging safety accidents in lithium-ion batteries is high. Overcharging will cause a certain amount of dendrite lithium to be formed on the negative electrode of the battery and generate a lot of heat, and the rapid heat generation will trigger chemical and electrochemical reactions between the components inside the battery, and the resulting gas will cause the battery to bulge and even cause Battery thermal runaway. If singl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0563H01M10/42H01M10/44
CPCH01M10/0525H01M10/0563H01M10/4235H01M10/443Y02E60/10
Inventor 吴洋徐晓炜杨广白雪君常胜利顾轶玮胡志鹏周钦哲姜发令
Owner SHANGHAI AEROSPACE POWER TECH
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