Aging mechanisms and thermal stability of aged commercial 18650 lithium ion battery induced by slight overcharging cycling
By Jialong Liu, Qiangling Duan, Mina Ma, Chunpeng Zhao, Jinhua Sun, Qingsong Wang. 2020
217 citations recorded by the source corpus.
Abstract Because of the inconsistency in battery pack and failure of charging device, slight overcharging of lithium ion batteries appears and even causes to thermal runaway. The aging behavior and mechanisms of lithium ion battery under slight overcharging cycling are studied qualitatively and quantitatively based on incremental capacity analysis and electrochemical impedance spectroscopy in this work. The results show that slight overcharging accelerates battery aging because of the loss of active material. While, conductive loss influences capacity fading less. The effect of lithium density loss is in the middle level. So it is suggested that incremental capacity analysis and impedance estimation are used to detect overcharging cycling on-line. Furthermore, the thermal stability of aged batteries are studied using Extended Volume Accelerating Rate Calorimeter. The results show that the stability of aged batteries become worse. The anode plays a key role in the thermal stability changes because of lithium plating under overcharging. The cathode dominates the stability after 70% SOH because of structure damage of cathode.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/f55c60f6abe5f38f19902174c3d31a9a1d086ec4
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In Automotive Engineering
In Electrical and Electronic Engineering
Citations in the corpus
- Lithium-Ion Battery Operation, Degradation, and Aging Mechanism in Electric Vehicles: An Overview (2021, background): “In [52] the author accelerated the battery aging by 300 mV overcharging.”