【摘要】 以电动汽车用磷酸铁锂动力电池为研究对象,采用混合脉冲功率法(HPPC)对磷酸铁锂动力电池进行测试,分析脉冲电流大小、脉冲时间与电池直流内阻、极化内阻的影响。研究结果表明:随着脉冲时间的增加,磷酸铁锂动力电池的内阻呈增长态势;放电电流增大,电池的极化内阻和直流内阻呈减小态势;在32A放电电流,荷电状态(SOC)=100%条件下,磷酸铁锂动力电池的极化内阻为20.89mΩ,直流内阻为62.49mΩ。更多还原

【Abstract】 Taking LiFePO₄ power battery for EV as the experimental subject,charging/discharging experiments and hybrid pulse power characterization（HPPC）were conducted to study the characteristic of LiFePO₄ including DC internal resistance and polarization resistance.With the increase of pulse time,the battery DC resistance increased.With the increase of discharge current,the polarization resistance and DC internal resistance were decreased.Under the condition of SOC=100% and discharge current was 32 A,the polarization resistance of lithium iron phosphate power battery was 20.89 mΩ,DC resistance was 62.49 mΩ.更多还原