基于不同衰退路径下的锂离子动力电池低温应力差异性

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Abstract Lithium power battery is usually impacted by low temperature in a particular situation, and its low temperature stress is different with that in initial condition. Taken 35 Ah composite battery as an example, work range of the battery was divided by the transformation curve of the incremental capacity analysis based on different reaction stages of battery charging and discharging process. By aging the batteries at different SOC range, this paper traced the changes of electrochemical properties and analyzed degradation mechanism. Under 0℃ environment, the stress differences under low temperature of batteries which were degraded through different paths, was analyzed using C/3, 1C, 3C/2, 2C and 5C/2 currents to impact the aging cells by charging and discharging respectively. The result showed that the power battery produced obviously different degradation paths when it cycled at different SOC ranges. There is no mapping relation and consistency between low temperature degradation and cycling degradation. The conclusion provides the basis for battery pack lifetime analysis and second battery matching.

Key words： Lithium-ion battery degradation path low temperature stress degradation mechanisms

Received: 30 May 2014 Published: 11 July 2016

PACS:

TM912

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	Sun Bingxiang
	Jiang Jiuchun
	Han Zhiqiang
	Ma Zeyu
	Zheng Fangdan

Cite this article:

Sun Bingxiang,Jiang Jiuchun,Han Zhiqiang等. The Lithium-Ion Battery Low Temperature Stress Based on Different Degradation Paths[J]. Transactions of China Electrotechnical Society, 2016, 31(10): 159-167.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I10/159

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