LiFePO4/C 锂离子电池直流内阻测试研究摘要:研究了圆柱形动力磷酸铁锂锂离子电池在不同电流、不同测试持续时间下的直流内阻
分析了电池 SOC、充电电流和放电电流、持续时间以及电流和时间的交互作用对电池直流内阻的影响
研究表明,测试电流和持续时间对电池的直流内阻影响比较大, 在 30~80%SOC范围内相同测试条件下电池的直流内阻变化不大;放电测试条件下的直流内阻略高于充电测试条件下的直流内阻;在0~10s 内,电池的直流内阻测试值与测试时间呈线性变化关系;容量型电池与功率型电池的直流内阻变化规律相同
关键词:直流内阻,磷酸铁锂, 锂离子电池,动力电池,测试方法Study on the DC internal resistance of LiFePO4/C Li-ion battery Abstract: DC internal resistance of battery is an essential parameter for designing vehicle auxiliary system and battery pack
The effects of current, time, SOC on DC internal resistance of LiFePO4/C Li-ion battery were tested and analyzed respectively
The research shows that the DC internal resistance is similar at 30~80% SOC on the same test methods, the DC internal resistance with discharging methods is larger than it with charging methods,