触发方式对锂离子电池热失控特性影响的实验研究

IF 2.6 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Yuanjin Dong, Jian Meng, Xiaomei Sun, Peidong Zhao, Peng Sun, Bin Zheng
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引用次数: 0

摘要

锂离子电池作为新能源汽车的重要组成部分,其安全性引起了广泛关注。为了揭示三元锂离子电池在不同触发模式下的机理和特性,建立了实验系统。分析了不同触发方式对电池表面温度、电池内部温度、注入时间和电池电压的影响。其中,针灸、过热和过度充电被用作机械、热和电滥用的触发条件。结果表明:注入时间和表面峰值温度与热失控前的能量输入呈正相关;在电池触发滥用之前,输入能量越多,电池表面温度越高,热失控越严重,对周围电池系统的破坏也越大。在相同条件下,过充热失控的强度和破坏程度大于内部短路和过温。电压忽升忽降的异常变化可作为判断是否发生过充热失控的条件。最后,根据不同位置的温度曲线,总结出不同滥用条件下的热扩散规律,为电池模块的安全设计提供依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Study on Effects of Triggering Modes on Thermal Runaway Characteristics of Lithium-Ion Battery
As an important component of new energy vehicles, the safety of lithium-ion batteries has attracted extensive attention. To reveal the mechanism and characteristics of ternary lithium-ion batteries under different trigger modes, an experimental system was established. The effects of different trigger modes on battery surface temperature, battery internal temperature, injection time, and battery voltage were analyzed. Among them, acupuncture, overheating, and overcharging are used as trigger conditions for mechanical, thermal, and electrical abuse. The results show that the injection time and surface peak temperature are positively correlated with the energy input before thermal runaway. Before the cell triggers abuse, the more input energy, the higher the cell surface temperature, the more serious the thermal runaway, and the higher the damage to the surrounding battery system. Under the same conditions, the intensity and damage degree of overcharge thermal runaway are greater than those of internal short circuit and overtemperature. The abnormal change of voltage suddenly rising and rapidly falling can be used as a condition to judge whether overcharge thermal runaway occurs. Finally, according to the temperature curves at different positions, the thermal diffusion law under different abuse conditions is summarized, which provides a basis for the safety design of the battery module.
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来源期刊
World Electric Vehicle Journal
World Electric Vehicle Journal Engineering-Automotive Engineering
CiteScore
4.50
自引率
8.70%
发文量
196
审稿时长
8 weeks
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