Thermal runaway simulation method based on overcharged lithium ion battery

A technology of a lithium-ion battery and a simulation method, applied in the field of thermal runaway simulation based on an overcharged lithium-ion battery, can solve the problem of not considering the specificity of different battery cells, and achieve the effect of effective analysis and prediction

Active Publication Date: 2020-04-10
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • Thermal runaway simulation method based on overcharged lithium ion battery
  • Thermal runaway simulation method based on overcharged lithium ion battery
  • 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 so that those skilled in the art can 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 of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0065] Such as figure 1 As shown, in one embodiment of the present invention, a kind of thermal runaway simulation method based on overcharged lithium-ion battery comprises the following steps:

[0066] S1: Carry out the charge and discharge test on the lithium battery sample, and obtain the time domain voltage data U(t), time domain current data I(t) and time domain surface temperature data T(t) during the charge and disch...

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Abstract

The invention discloses a thermal runaway simulation method based on an overcharged lithium ion battery. The method is based on an electrochemical reaction mechanism and a heat production characteristic principle of a battery. Thermoelectric characteristic test and modeling simulation calculation are carried out on the lithium ion battery; the battery temperature change characteristics under the charging condition are studied; a thermal abuse model is established according to the characteristics; therefore, the properties of the battery monomers under different parameters are analyzed, the research on the chemical reaction change in the battery under the overcharge thermal runaway working condition is realized, and the problems that an existing thermal runaway simulation method based on the overcharge lithium ion battery lacks comprehensive analysis on an electrochemical reaction mechanism and heat production characteristics, and the specificity of different battery monomers is not considered are solved.

Description

technical field [0001] The invention relates to the battery field, 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, lithium battery safety accidents frequently occur due to improper operation, especially overcharging. The internal mechanism of this kind of 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, may cause accidents such as combustion and explosion. Overcharging is very common in daily life, whether it is small electronic devices such as mobile phones and...

Claims

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Application Information

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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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