Kang Jianqiang, Yang Guang, Wang Yongsheng, Wang Jing V, Wang Qian, Zhu Guorong
Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, P.R. China.
Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan 430070, P.R. China.
iScience. 2024 Jun 17;27(7):110287. doi: 10.1016/j.isci.2024.110287. eCollection 2024 Jul 19.
Investigating the correlation between aging mechanisms and state of charge (SOC) can optimize cycling conditions and prolong the life cycle of lithium-ion batteries (LIBs). A long-term cycle between a certain SOC range is usually employed to study this correlation. However, this method necessitates a lengthy period, running from months to years, prolonging the research duration significantly. The aging mechanisms obtained through this method are a result of the coupling of various SOC levels; the aging mechanisms at a specific SOC level are not accurately decoupled and analyzable. The proposed Zero-sum pulse method, using symmetrical pulses with small SOC amplitude variations on SOC, can explore aging mechanisms of LIBs at a specific SOC level and reduce the time to less than a week, which significantly expedite the research process. The aging mechanisms at 30%, 50%, 70%, and 90% SOC levels are explored to verify the accuracy and timeliness of this method.
研究老化机制与荷电状态（SOC）之间的相关性可以优化循环条件并延长锂离子电池（LIB）的生命周期。通常采用在特定SOC范围内进行长期循环来研究这种相关性。然而，这种方法需要数月至数年的长时间，显著延长了研究持续时间。通过这种方法获得的老化机制是各种SOC水平耦合的结果；特定SOC水平下的老化机制无法准确解耦和分析。所提出的零和脉冲方法，使用SOC上具有小幅度变化的对称脉冲，可以探索特定SOC水平下LIB的老化机制，并将时间缩短至不到一周，这显著加快了研究进程。探索了SOC为30%、50%、70%和90%水平下的老化机制，以验证该方法的准确性和及时性。
