离子电池过充热失控实验及其残留物分析
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摘要
针对过充条件下手机锂离子电池热失控爆炸事故,参考GB/T 18287-2013中的过充电测试方法对手机锂离子电池进行实验。选取荷电状态为0、50%、100%的电池进行实验,结合手机锂离子电池过充电过程中的电压和温度变化、电池爆炸燃烧的特征现象以及燃烧残留物痕迹特征,对锂离子电池过充电行为进行分析研究。结果表明:荷电状态的不同,锂离子电池热失控反应后残留物的痕迹特征有极大不同。荷电状态100%的电池在经历过充破坏后,其残留物粉末的XRD谱图均不含原正极材料LiCoO2的特征峰,负极C的特征峰依然存在且强锐,但峰角度均向大角度偏移。
Against the thermal runaway and explosion accidents when the mobile phone Lithium-ion battery is overcharged,the overcharge experiments on the mobile phone lithium-ion batterywere carried out by the method referring standard GB/T 18287-2013. The states of charge of battery were 0, 50% and 100%. The overcharge behavior of lithium-ion battery was analyzed specifically combined with the voltage and temperature changes, the characteristics of the battery explosion and the burning residue patterns features. The results showed that the burning residue patterns features were different for battery with different state of charge. The residue of battery with 100% state of charge had no characteristic peak of former positive pole material which was LiCoO2 in XRD spectrum. The characteristic peak of C in negative pole was still strong and sharp, but the angle of peak moved to the bigger angle.
Against the thermal runaway and explosion accidents when the mobile phone Lithium-ion battery is overcharged,the overcharge experiments on the mobile phone lithium-ion batterywere carried out by the method referring standard GB/T 18287-2013. The states of charge of battery were 0, 50% and 100%. The overcharge behavior of lithium-ion battery was analyzed specifically combined with the voltage and temperature changes, the characteristics of the battery explosion and the burning residue patterns features. The results showed that the burning residue patterns features were different for battery with different state of charge. The residue of battery with 100% state of charge had no characteristic peak of former positive pole material which was LiCoO2 in XRD spectrum. The characteristic peak of C in negative pole was still strong and sharp, but the angle of peak moved to the bigger angle.
引文
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[3]徐文娟,张岩,刘露露,等.磷酸铁锂电池自放电检测工艺研究[J].河南科技,2016,58(7):129-131.
[4]贺浩.磷酸铁锂18650动力锂离子电池失效机理及动态脱嵌锂机理研究[D].长沙:湖南大学,2016.
[5] GB/T 18287-2013,移动电话用锂离子蓄电池及蓄电池总规范[S].
[6]杨书华,邹鹏,石文荣,等.锂离子电池管理系统研究[J].电源技术,2015,39(12):2593-2594.
[7]张雯霞.锂离子电池电解液的锥形量热仪研究[D].合肥:中国科学技术大学,2015.
[8]崔闻宇.聚合物锂离子电池隔膜的研究[D].哈尔滨:哈尔滨工业大学,2006.
[9]王静,余仲宝,初旭光,等.锂离子电池安全性研究进展[J].电池,2003,33(6):388-391.
[10]魏晓玲,王子港,杨朗,等.锂离子电池热失控过程负极放热反应研究[J].电源技术. 2009,33(10):879-883.
[11]胡广侠.锂离子电池充放电过程的研究[D].北京:中国科学院,2002.
[12]赵学娟.锂离子电池在绝热条件下的循环产热研究[D].合肥:中国科学技术大学,2014.
[13]刘强.锂离子电池过充保护添加剂的研究[D].天津:天津大学,2006.
[14]李国晓.电动汽车电池组快速充电研究[J].甘肃联合大学学报(自然科学版),2011,25(1):62-65.