佛山科学技术学院学报（自然科学版）2024，Vol.42Issue(5)：1-8,8.
面向可用能量的锂离子电池低温预热方法研究
Research on low-temperature preheating for lithium-ion batteries with available energy
摘要
Abstract
The loss of discharge capacity is currently the main bottleneck problem that restricts the application of lithium-ion batteries at low temperatures.Preheating is the key method to solve the low-temperature application of lithium-ion batteries.Currently,the low-temperature preheating methods for lithium-ion batteries mainly focus on the aspects of preheating rate and temperature,ignoring the available energy of lithium-ion batteries after preheating.This study theoretically analyzes the relationship between preheating and the available energy of lithium-ion batteries based on external heating method,experimentally studies the low-temperature discharge performance of lithium-ion batteries under different preheating strategies,and proposes a low-temperature preheating energy management method for lithium-ion batteries with maximum available energy.The research shows that there is a nonlinear relationship between preheating time and battery available energy.When discharged at 0.5 C,the battery with preheating for 1 minute has a higher available energy than that with preheating for 3 minutes and 5 minutes,which is 3.72％and 5.95％higher,respectively.When discharged at 1.0C,1.5 C,and 2.0 C,the battery performs best with preheating for 3 minutes,and only consumes 4.13％of the rated capacity.The discharge capacity can reach 89.99％,75.17％,and 73.76％of the rated capacity,respectively.Compared with batteries with preheating for 1 minute and 5 minutes,the available energy is 0.16％,2.27％,and 6.80％higher,respectively,and 9.45％,12.26％,and 13.98％higher,respectively.The low-temperature preheating time should be adjusted according to the battery discharge rate to maximize the available energy of the battery.关键词
锂离子电池/低温/可用能量/外部加热Key words
lithium-ion batteries/low temperature/available energy/external heating分类
信息技术与安全科学引用本文复制引用
张忠波,陈志强,余伟,廖才航,朱文博,黎海兵..面向可用能量的锂离子电池低温预热方法研究[J].佛山科学技术学院学报（自然科学版）,2024,42(5):1-8,8.基金项目
广东省基础与应用基础研究基金资助项目(2022A1515110187,2022A1515110683,2022A1515140042) （2022A1515110187,2022A1515110683,2022A1515140042）
