佛山大学学报（自然科学版）2026，Vol.44Issue(4)：44-52,9.
锂离子电池组低温预热放电特性与不一致性研究
Research on low-temperature preheating discharge characteristics and inconsistencies of lithium-ion battery pack
摘要
Abstract
Performance degradation and consistency deterioration of lithium-ion battery packs in low-temperature environments are key bottlenecks for their widespread application,and external preheating is considered an important solution.Taking lithium-ion battery packs for electric vehicles as the research object,this paper systematically studies the effects of external preheating on the low-temperature discharge performance and consistency of the battery pack by comparing low-temperature discharge experiments under different preheating durations.The results show that at-20℃,moderate preheating can increase the battery pack's discharge voltage by up to 9.74V,boost discharge capacity by 0.9%～3.8%,and ensure sustainable high-rate discharge of the battery pack.At the same time,moderate preheating can reduce the standard deviation of temperature between individual cells by up to 49.6%,improving consistency during discharge.However,excessively long preheating times do not further improve consistency and instead accelerate the accumulation of differences due to worsening temperature distribution.关键词
锂离子电池组/低温/放电性能/不一致性Key words
lithium-ion battery pack/low temperature/discharge performance/inconsistency分类
信息技术与安全科学引用本文复制引用
张忠波,翁裕庄,张振杰,余伟,朱文博,黎海兵,刘芹..锂离子电池组低温预热放电特性与不一致性研究[J].佛山大学学报（自然科学版）,2026,44(4):44-52,9.基金项目
广东省基础与应用基础研究基金资助项目(2022A1515110683,2022A1515110187,2022A1515140042) （2022A1515110683,2022A1515110187,2022A1515140042）
