电动汽车用磷酸铁锂动力电池内阻特性研究
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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。
Taking LiFePO_4 power battery for EV as the experimental subject,charging/discharging experiments and hybrid pulse power characterization(HPPC)were conducted to study the characteristic of LiFePO_4 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.
Taking LiFePO_4 power battery for EV as the experimental subject,charging/discharging experiments and hybrid pulse power characterization(HPPC)were conducted to study the characteristic of LiFePO_4 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.
引文
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[10]王双双,李新峰,张沿江,等.内阻差异对锂离子电池性能的影响[J].安徽大学学报(自然科学版),2016,40(2):49-53.
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[12]徐晶.梯次利用锂离子电池容量和内阻变化特性研究[D].北京:北京交通大学,2014.
[13]苏伟,周方方,钟国彬,等.淘汰磷酸铁锂动力电池内阻测试方法研究[J].电源技术,2016,40(2):274-276.
[2]倪红军,吕帅帅,陈林飞,等.混合动力汽车磷酸铁锂电池充放电性能研究[J].化工新型材料,2015,43(1):133-134.
[3]Forgez C,Do D V,Friedrich G,et al.Thermal modeling of a cylindrical LiFePO4/graphite lithium-ion battery[J].Journal of Power Sources,2010,195(9):2961-2968.
[4]陈萍,李瑜,张江伟,等.CNT及集流体对电池内阻增幅的影响[J].电池,2014,44(6):342-344.
[5]Carter R,Cruden A,Hall P J,et al.An improved lead-acid battery pack model for use in power simulations of electric vehicles[J].IEEE Transactions on Energy Conversion,2012,27(1):21-28.
[6]于申军,周永超,李贺,等.内阻差异对锂离子电池组安全性能的影响[J].化工学报,2010,61(11):2960-2964.
[7]刘炎金,张佳2),魏引利,等.直流内阻对锂电池性能和配组电压一致性研究[J].电源技术,2016,40(1):67-69.
[8]Lu L,Han X,Li J,et al.A review on the key issues for lithium-ion battery management in electric vehicles[J].Journal of Power Sources,2013,226:272-288.
[9]Lin C,Xu S,Chang G,et al.Experiment and simulation of a LiFePO4 battery pack with a passive thermal management system using composite phase change material and graphite sheets[J].Journal of Power Sources,2015,275:742-749.
[10]王双双,李新峰,张沿江,等.内阻差异对锂离子电池性能的影响[J].安徽大学学报(自然科学版),2016,40(2):49-53.
[11]Rao Z,Wang S.A review of power battery thermal energy management[J].Renewable&Sustainable Energy Reviews,2011,15(9):4554-4571.
[12]徐晶.梯次利用锂离子电池容量和内阻变化特性研究[D].北京:北京交通大学,2014.
[13]苏伟,周方方,钟国彬,等.淘汰磷酸铁锂动力电池内阻测试方法研究[J].电源技术,2016,40(2):274-276.