锂离子电池组热失控燃爆连锁反应研究
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摘要
论文研究了锂离子电池组中某电池单体过充致爆的热失控燃爆连锁反应,分析了燃爆时间与充电电流的关联关系,以及过充促发热失控时电池壳体的温度与导致燃爆时间。结果表明,电池组中某电池单体热失控燃爆会引发连锁效应,电池发生热失控的时间随着充电电流的增大而变短;热失控燃爆时间和过充电流具有幂次函数关系;热失控促发时的电池壳体表面温度为75℃,热失控后电池燃爆时间在1 min左右。
The thermal runaway combustion and explosion chain reaction in a lithium ion battery group by overcharging a single cell was investigated in this study. The explosion times and the maximum overcharge voltages of a battery by different overcharge currents are compared. The relationship between the explosion times and the charging current,also the temperatures of the battery shell when thermal runaway was triggered and the times to explosion were analyzed. The results show that the thermal runaway explosion of a single cell in the battery group can triggers chain effect,the runaway times shortens as the charging currents increase,the voltage overcharged to explosion as high as 25. 6 V at4 C. The explosion time and overcharge current have a square relationship. The surface temperature of the cell shell is tested to 75 ℃ and the explosion time was about 1 min when thermal runaway was triggered.
The thermal runaway combustion and explosion chain reaction in a lithium ion battery group by overcharging a single cell was investigated in this study. The explosion times and the maximum overcharge voltages of a battery by different overcharge currents are compared. The relationship between the explosion times and the charging current,also the temperatures of the battery shell when thermal runaway was triggered and the times to explosion were analyzed. The results show that the thermal runaway explosion of a single cell in the battery group can triggers chain effect,the runaway times shortens as the charging currents increase,the voltage overcharged to explosion as high as 25. 6 V at4 C. The explosion time and overcharge current have a square relationship. The surface temperature of the cell shell is tested to 75 ℃ and the explosion time was about 1 min when thermal runaway was triggered.
引文
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[12]连丽玲.基于COMSOL Multiphysics平台的动力锂离子电池模块散热结构仿真[J].自动化与仪器仪表,2017,(12):170-172.
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[14]孙俊,王京梅,李莉,等.基于单片机的串联锂离子电池组监测系统设计[J].电子科技,2011,24(10):4-6.
[15]郭芙琴.锂离子动力电池的性能选择及安全性保护[J].电子设计工程,2012,20(17):69-71.
[16]李争,孙宏旺,智若东,等.动力锂离子电池部分荷电和深度放电状态下的脉冲充电技术[J].现代电子技术,2018,41(2):102-106.
[2] BITSCHE O,GUTMANN G. Systems for hybrid cars[J].Journal of Power Sources,2004,127:8-15.
[3] Wang Qingsong,Ping Ping,Zhao Xuejuan,et al. Thermal runaway caused fire and explosion of lithium-ion battery[J]. Journal of Power Sources,2012,208:210-224.
[4] MALEKI H,HOWARD J N. Internal short circuit in li-ion cells[J]. Journal of Power Sources,2009(191):568-574.
[5]张海林,和祥运,李艳,等.锂离子电池的针刺测试[J].电池工业,2014,(19):194-202.
[6] KIM C S,YOO J S,JEONG K M,et al. Investigation on internal short circuits of lithium polymer batteries with a ceramic-coated separator during nail penetration[J]. Journal of Power Sources,2015(289):41-49.
[7]向俊,尚丽平,王顺利,等.一种智能锂离子电池充电电源设计[J].自动化与仪器仪表,2017,(12):130-133.
[8] ANDREY W G,SEBASTIAN S,RENE P,et al. Thermal runaway of commercial 18650 Li-ion batteries with LFP and NCA cathodes-impact of state of charge and overcharge[J]. Journal of Royal Society of Chemistry,2015,2:13-29.
[9] Lee K S,Myung S T,Amine K H,et al. Structural and electrochemical properties of layered Li[Ni1-2xCoxMnx]O2(x=0. 1-0. 3)positive electrode materials for li-ion batteries[J]. Journal of The Electrochemical Society,2007,154(10):A971-977.
[10]罗星娜,张青松戚瀚鹏,等.基于计算流体动力学的锂离子电池热失控多米诺效应研究[J].科学技术与工程,2014,(33):327-332.
[11]张青松,姜乃文,罗星娜,等.锂离子电池热失控多米诺效应实证研究[J].科学技术与工程,2016,16(10):252-255.
[12]连丽玲.基于COMSOL Multiphysics平台的动力锂离子电池模块散热结构仿真[J].自动化与仪器仪表,2017,(12):170-172.
[13]高安同,王文兵,张金,等.基于P89LPC936单片机的锂离子电池组智能充电机设计[J].电子设计工程,2014,(19):117-120.
[14]孙俊,王京梅,李莉,等.基于单片机的串联锂离子电池组监测系统设计[J].电子科技,2011,24(10):4-6.
[15]郭芙琴.锂离子动力电池的性能选择及安全性保护[J].电子设计工程,2012,20(17):69-71.
[16]李争,孙宏旺,智若东,等.动力锂离子电池部分荷电和深度放电状态下的脉冲充电技术[J].现代电子技术,2018,41(2):102-106.