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A thermal runaway simulation method based on overcharged lithium-ion battery

A lithium-ion battery and simulation method technology, which is applied in the field of thermal runaway simulation based on overcharged lithium-ion batteries, can solve problems such as not considering the specificity of different battery cells, and achieve reliable data, guaranteed reliability, comprehensive data and Effect

Active Publication Date: 2022-07-12
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing thermal runaway simulation model of lithium-ion battery overcharge has many defects, especially the lack of a comprehensive analysis of the electrochemical reaction mechanism and heat generation characteristics, and does not consider the specificity of different battery cells

Method used

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  • A thermal runaway simulation method based on overcharged lithium-ion battery
  • A thermal runaway simulation method based on overcharged lithium-ion battery
  • A thermal runaway simulation method based on overcharged lithium-ion battery

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Embodiment Construction

[0064] The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes Such changes are obvious within the spirit and scope of the present invention as defined and determined by the appended claims, and all inventions and creations utilizing the inventive concept are within the scope of protection.

[0065] like figure 1 As shown, in an embodiment of the present invention, a thermal runaway simulation method based on an overcharged lithium-ion battery includes the following steps:

[0066] S1: Perform a charge-discharge test on the lithium battery sample to obtain time-domain voltage data U(t), time-domain current data I(t) and time-domain surface temperature data T(t) during the charge-discharge process of the lithium battery sample; ...

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Abstract

The invention discloses a thermal runaway simulation method based on an overcharged lithium ion battery. Based on the electrochemical reaction mechanism and the principle of heat production characteristics of the battery, the lithium ion battery is subjected to thermoelectric characteristics test and modeling simulation calculation to study the charging condition. The battery temperature change characteristics, and then establish a thermal abuse model according to the characteristics, so as to analyze the properties of the battery cells under different parameters, realize the exploration of the internal chemical reaction changes of the battery under the overcharge thermal runaway condition, and solve the existing problems based on overcharge. The thermal runaway simulation method of lithium-ion batteries lacks a comprehensive analysis of the electrochemical reaction mechanism and heat generation characteristics, and does not consider the specificity of different battery cells.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a thermal runaway simulation method based on an overcharged lithium-ion battery. Background technique [0002] With the development of electronic technology, more and more electronic products use lithium batteries as sustainable energy storage devices. At the same time, due to improper operation, especially overcharge, safety accidents of lithium batteries occur frequently. The internal mechanism of this accident is that a part of the heat will be generated during the charging process of the lithium battery. When the charging reaches the rated voltage and power, continuing to charge will cause the accumulation of heat. Excessive accumulated heat will cause the battery temperature to rise sharply. Side reactions, in severe cases, can cause fire, explosion and other accidents. Overcharging is very common in life. Whether it is a small electronic device such as a mobile phone and a compute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/08
CPCY02E60/10
Inventor 胡广地黄文才郭峰赵利民赛影辉胡坚耀
Owner SOUTHWEST JIAOTONG UNIV
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