Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for testing explosion cause of lithium ion cell explosion

A lithium ion battery and a testing method are applied in the field of analyzing and testing the cause of battery explosion by using the explosion residue of the lithium ion battery, which can solve the problem of not being able to better analyze the cause of the explosion of an exploded battery, and achieve simple operation and analysis. Accurate results

Inactive Publication Date: 2011-02-16
ZHENGZHOU BAK BATTERY CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, few people have studied the method of accurately analyzing the cause of battery explosion, so it is not possible to analyze the explosion cause of the battery that has exploded.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for testing explosion cause of lithium ion cell explosion
  • Method for testing explosion cause of lithium ion cell explosion
  • Method for testing explosion cause of lithium ion cell explosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Pour out and collect the internal residue of a battery that exploded due to unknown reasons, remove the whole piece of copper foil, grind for about fifteen minutes, and pass through a 100-mesh sieve to obtain an under-sieve powder. Then the powder obtained by it is carried out DSC analysis, draws DSC analysis curve such as Figure 5 shown. By comparison with the standard reference chart, with figure 1 Very similar, it can be seen that the battery exploded due to overcharging.

Embodiment 2

[0038] Collect the internal residue of a battery that exploded due to unknown reasons, remove the whole piece of copper foil, grind for about 15 minutes, and pass through a 200-mesh sieve to obtain an under-sieved powder. Then the powder obtained by it is analyzed by DSC, and the analysis curve is obtained as follows: Figure 6 shown. By comparison with the standard reference chart, with figure 2 Very similar, so it can be known that the battery is due to the explosion caused by the short circuit of the battery caused by acupuncture.

[0039] Through the DSC analysis of the explosion products, the characteristic products produced by different reasons for the explosion can be well characterized, so as to distinguish the cause of the explosion. The method is simple in operation, accurate in analysis results, and can better distinguish what causes the explosion of the lithium battery.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The method of ascertaining cause of lithium ion cell explosion includes: setting explosion cause standard, collecting the residues of the exploded cell, grinding and sieving to obtain powder, differential scanning and calorimetric analysis on the powder, and comparing the obtained differential scanning and calorimetric curve with the standard map to determine the explosion cause. The standard mapis differential scanning and calorimetric curve obtained through analyzing the specific explosion cause of standard lithium ion cell. The present invention has simple operation and accurate analysis results.

Description

technical field [0001] The invention relates to a battery failure analysis and test method, in particular to a method for analyzing and testing the cause of battery explosion by using the explosion residue of lithium ion batteries. Background technique [0002] Lithium-ion batteries are now more and more used in mobile phones and laptops, and have become a necessity in people's lives. However, lithium-ion battery explosions also occur from time to time. Lithium-ion battery research institutions around the world have been committed to solving lithium-ion battery problems. The problem of explosion, but so far, there has been no good solution, and no company can guarantee 100% that the batteries it produces will not explode during customer use. Lithium-ion battery explosion is generally caused by overcharging or short circuit. Only by correctly analyzing the cause of battery explosion can we conduct in-depth research on the mechanism of battery explosion, so as to find out the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36G01R31/00
Inventor 曹建华毛焕宇
Owner ZHENGZHOU BAK BATTERY CO LTD