采用热重分析系统和质谱相耦合定性分析老化的三元锂电池产生气体的种类和释放量趋势,判断电池工作安全区间及危险临界点。结果表明,三元锂电池在100~200℃开始有挥发性物质释放,生成的气体以H₂、CH₄等小分子为主,在200℃以上会持续释放长链大分子含碳气体。可依据上述特点对电池存在的风险进行提前预警。

Thermogravimetric analysis system and mass spectrometry with electron bombardment ionization (TG-DSC-EI-MS) is employed to qualitatively analyze the types and amount of gases generated from aged ternary lithium batteries,and to judge the safe operating interval and dangerous critical point of the battery.It is shown that ternary lithium battery starts to release volatile substances from 100-200℃,and the gases generated are mainly H₂,CH₄ and other small molecules.Above 200℃,ternary lithium battery will continuously release long chain macromolecules containing carbon gas.According to these characteristics,the risks existed in aged ternary lithium batteries can be warned in advance.