锂离子电池老化机理及综合利用综述

Review of aging mechanism and comprehensive use of Li-ion battery

准确的老化机理诊断与健康状态(SOH)评估可提示用户及时更换故障电池,保障电池系统的安全运行。分析总结过充与温度影响下锂离子电池容量衰减的老化机理,依据剩余容量,将退役锂离子电池应用于电网储能、应急电源等。对比不同方法下的老化诊断、SOH评估现状,展望未来建立退役锂离子电池快速诊断老化以及可用于实时监测退役锂离子电池二次利用过程中SOH变化的模型和系统。

Accurate aging mechanism diagnosis and state of health(SOH) assessment could prompt users to replace failure batteries in time to ensure the safe operation of the battery system.The aging mechanism of Li-ion battery capacity fading under the influence of overcharge and temperature was analyzed and summarized, the retired Li-ion batteries were applied to grid energy storage and emergency power supply based on their remaining capacity.The current status of aging diagnosis and SOH assessment under different methods were compared.The establishment of models and systems for rapid aging diagnosis and real-time monitoring of SOH during the secondary use of retired Li-ion battery in the future were expected.