电源技术2026，Vol.50Issue(5)：838-847,10.DOI:10.3969/j.issn.1002-087X.2026.05.008
预紧力对锂离子电池充电性能的影响
Effect of preload pressure on charging performance of lithium-ion batteries
袁文静 1杨慧敏 2朱阳阳 2安洪力 2王华宇2
作者信息
- 1. 北京新能源汽车股份有限公司,北京 100176
- 2. 北京新能源汽车股份有限公司蓝谷动力系统分公司,北京 100176
- 折叠
摘要
Abstract
To clarify the effect of preload pressure on the charging performance of lithium-ion batter-ies and determine the optimal preload pressure value,a multi-physical field coupling model was es-tablished for a ternary-graphite pouch cell.The model accuracy was verified using test data under different C-rates and preload pressures.The influences of porosity and active specific surface area on the charging performance were analyzed,and the optimal preload pressure for the best charging per-formance was predicted.On one hand,preload pressure compresses the electrodes,which hinders the lithium-ion transfer in the electrolyte.On the other hand,it changes the contact state among elec-trode materials,thereby affecting the charge transfer resistance.The combined effects of the afore-mentioned mechanisms result in 175 kPa being the optimal preload pressure for 2.5 C-rate charging,at which the battery exhibits the minimal internal resistance and the best charging performance.This study elaborates on the impact of preload pressure on the charging performance of lithium-ion bat-teries and provides theoretical guidance for the design of preload pressure.关键词
锂离子电池/多物理场耦合模型/预紧力/活性比表面积/孔隙率Key words
lithium-ion battery/multi-physical field coupling model/preload pressure/active specific surface area/porosity分类
信息技术与安全科学引用本文复制引用
袁文静,杨慧敏,朱阳阳,安洪力,王华宇..预紧力对锂离子电池充电性能的影响[J].电源技术,2026,50(5):838-847,10.
