锂电池特性对充电站参数设计的影响研究

Influence of li-ion battery characteristics on charging station parameter design

针对更换式充电站参数设计问题,研究了不同条件(充电倍率、电池老化、温度)下,电池特性对充电站参数设计的影响。采用理论推导与奥运电动客车实际运行数据、电池充放电实验数据分析相结合的方法,研究了转折荷电状态(SOCc)、回站荷电状态(SOCe)、恒压阶段充电时间(t_(cv))的变化规律。建立了充电站设计参数优化模型,优化了充电站设计关键参数充电时间(T_c)、备用电池组数(N_b)、配电功率(P)。将优化模型参数与充电站实际配置参数进行了对比,结果表明,备用电池数减少14组,减少25%;配电容量减少1.9MW,减少47.5%,验证了优化模型更符合实际运行情况。

For the parameters design of a replacement battery charging station, a study of liion battery properties was con ducted under the consideration of the factors of charging ratio, battery aging, temperature. Through the combination of the theoretical derivation with the analysis of the data obtained from Olympic bus actual operation and battery chargingdischarging experiments, the state of charge at turning point （ SOCc）, the state of charge back to a station （SOCe）, and the constant voltage charge time （t^v）were studied. Key parameters of charging stations, such as the charging time （Tc ）, the spare battery number（Nb ） and distribution power（P） were optimized by the proposed pa rameter optimization model. The comparison between the improved model parameters and actual application parame ters was performed, and the result indicated that the the proposed model performed better because Nb and P were decreased by 25% and 47.5%, respectively.