加热方式对锂离子电池热失控行为影响*

doi:10.16265/j.cnki.issn1003-3033.2021.09.007

摘要/Abstract

摘要： 为探究锂离子电池在运输和使用过程中面临不同受热条件下的安全性,利用圆柱加热棒和弹簧加热圈,分别以5、10 ℃/min的温升速率引发电池热失控并研究试验现象和数据,对热失控气体取样并分析气体成分。研究结果表明:电池热失控过程均经历蓄热阶段、排气阶段和热失控阶段;使用弹簧加热圈在5和10 ℃/min的温升速率下引发电池热失控的时间相较于加热棒分别快18.3%和40.2%,热失控阶段的最高温度分别降低11.2和24.6 ℃;使用加热棒加热的电池燃烧更加充分,电池热失控最高温度随加热装置温升速率的升高而降低。

关键词: 加热方式, 锂离子电池, 热失控, 热危险性, 加热方式

Abstract: In order to investigate safety of lithium-ion batteries under different heating conditions in the process of transportation and use, thermal runaway of battery was caused by a cylindrical heating rod and a spring heating ring at a temperature rise rate of 5 and 10 ℃/min respectively, and experimental phenomenon and data were studied. Thermal runaway gas was sampled and gas composition was analyzed. The results show that thermal runaway process of battery all goes through heat storage stage, exhaust stage and thermal runaway stage. At 5 and 10 ℃/min, time of thermal runaway caused by spring heating ring is 18.3% and 40.2% faster than that of heating rod, respectively, and the maximum temperature in the thermal runaway stage decreased by 11.2 and 24.6 ℃, respectively. When battery is heated by heating rod, combustion is more sufficient, and the maximum thermal runaway temperature of battery decreases with the increase of temperature rising rate of heating device.

Key words: heating method, lithium ion battery, thermal runaway, thermal hazard, heating methods

中图分类号:

X932

张青松, 刘添添, 白伟. 加热方式对锂离子电池热失控行为影响^*[J]. 中国安全科学学报, 2021, 31(9): 44-51.

ZHANG Qingsong, LIU Tiantian, BAI Wei. Effect of heating mode on thermal runaway behavior of lithium ion battery[J]. China Safety Science Journal, 2021, 31(9): 44-51.

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加热方式对锂离子电池热失控行为影响^*

Effect of heating mode on thermal runaway behavior of lithium ion battery

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