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Method for improving lithium ion battery security

A lithium-ion battery and safety technology, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, and electrolyte batteries, can solve problems such as battery overheating, thermal runaway, and battery fire, and achieve the effect of improving safety.

Inactive Publication Date: 2008-08-13
SHENZHEN BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium-ion batteries are in an environment with poor heat dissipation, and the temperature of the battery will rise. If the ambient temperature exceeds the self-reaction temperature of the chemical substances inside the battery, a thermal runaway reaction will occur, which will cause the battery to overheat or even explode.
For example: in the cab of a car with high temperature and strong sunlight, the temperature inside the car can be as high as 60 to 70 degrees. cause the battery to catch fire or explode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Charge 10 batteries to 4.10V and place them in an incubator at 40°C for 24 hours. After the battery cools to room temperature, continue to raise the temperature at an initial temperature of 50°C. Record the average value of the initial temperature of the battery's thermal reaction as 78.6 ℃.

Embodiment 2

[0014] Charge 10 batteries to 4.20V and place them in an incubator at 60°C for 24 hours. After the batteries are cooled to normal temperature, continue to raise the temperature at an initial temperature of 50°C. Record the average value of the initial temperature of the battery's thermal reaction as 80.1 ℃.

Embodiment 3

[0016] Charge 10 batteries to 4.13V and place them in an incubator at 55°C for 36 hours. After the batteries are cooled to normal temperature, continue to raise the temperature at an initial temperature of 50°C. Record the average value of the initial temperature of the battery's thermal reaction as 81.2 ℃.

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PUM

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Abstract

The present invention relates to a method for improving the security of the lithium ion battery, the method is realized by charging the battery to 4.10-4.20V and afterwards arranging the battery to the environment with temperature for 40-60 DEG C. In the technique provided by the invention the reaction initial temperature of the active chemical at the inner side of the battery can be increased for 5-10 DEG C and the security of the battery is effectively improved.

Description

Technical field [0001] The technology for improving the safety of lithium ion batteries related to the present invention specifically relates to a method for improving the safety of lithium ion batteries. Background technique [0002] Lithium-ion batteries are in an environment with poor heat dissipation. The temperature of the battery will rise. If the ambient temperature exceeds the self-reaction temperature of the chemical substances inside the battery, a thermal runaway reaction will occur, which will cause the battery to overheat or even explode. For example, in a high-temperature car cabin with strong sunlight, the temperature inside the car can be as high as sixty or seventy degrees. Under such harsh high-temperature conditions, the lithium-ion battery on the equipment in the car is prone to thermal runaway. Cause the battery to catch fire or explode. Generally, the starting temperature of battery self-reaction of lithium-ion battery is 70-75°C, and thermal runaway is pron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/38H01M10/44H01M10/40H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 黄加军张涛樊建辉
Owner SHENZHEN BAK BATTERY CO LTD