Energy Storage Science and Technology ›› 2025, Vol. 14 ›› Issue (9): 3530-3537.doi: 10.19799/j.cnki.2095-4239.2025.0260

• Energy Storage Test: Methods and Evaluation • Previous Articles     Next Articles

Research on accelerated aging and safety characteristics of lithium-ion batteries for energy storage

Mingxuan LIU1,2(), Wentao CHEN1,2, Shaopeng SHEN1,2, Shijie ZHANG1,2, zhen WEI1,2, Biao MA1,2, Danhua LI1,2, Shiqiang LIU1,2(), Fang WANG1,2()   

  1. 1.China Automotive Technology and Research Center Co. , Ltd.
    2.CATARC New Energy Vehicle Research and Inspection Center (Tianjin) Co. , Ltd. , Tianjin 300300, China
  • Received:2025-03-27 Revised:2025-04-22 Online:2025-09-28 Published:2025-09-05
  • Contact: Shiqiang LIU, Fang WANG E-mail:liumingxuan@catarc.ac.cn;liushiqiang@catarc.ac.cn;wangfang2011@catarc.ac.cn

Abstract:

With the continuous acceleration of the global energy transition, power storage has increasingly become a core sector of the energy industry. Lithium-ion batteries, as crucial components of electrochemical energy storage systems, have attracted significant attention from both the market and researchers. In practical applications, battery cycle life and long-term safety are key technical indicators for evaluating energy storage batteries and are closely interrelated. This study focuses on high-capacity lithium iron phosphate batteries and summarizes the testing protocols for high-temperature accelerated aging and the safety characteristics of batteries after cycling. The results show that within the first 200 cycles, the high-temperature accelerated aging effect cannot be strictly described as a fixed multiple of room-temperature cycling aging. However, as the number of cycles increases, the ratio of capacity degradation rates under 45 ℃ and 25 ℃ cycling approaches 2 and gradually stabilizes. These findings provide an important basis for predicting the service life of lithium-ion batteries. Furthermore, it was observed that the thermal runaway triggering temperature decreases as the state of health (SOH) declines. Based on the current results, the ratio of thermal runaway temperature to SOH can be maintained between 130 and 145, offering a theoretical foundation and data support for life prediction, real-time monitoring, and safety warnings in practical applications.

Key words: energy storage battery, cyclic performance, accelerated aging, thermal runaway

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