基于电池组级联的高压恒流电源电流控制方法研究

Research on current control method of high-voltage and constant current charging power supply based on battery packs connected in series

稳定的电流控制和精确的电压控制是高压恒流(HCC)充电电源控制系统的关键技术。本文基于电池组级联(BPCSs)的HCC充电电源提出了一种新的电流闭环的控制方法。该方法采用时序重构前移算法来提高充电的最大电流,实现了电流平均值的增大。文中首先建立了基于BPCSs的HCC充电电源充电系统的理论模型,并给出了其充电系统的电压控制方法和电流控制方法。其次,通过在PSIM仿真软件中建立仿真模型,验证了该方法的有效性。最后,基于仿真结果,设计了样机实验,实验结果验证了该方法的工程应用可行性。该方法保证了充电电流既能达到峰值,又能维持其稳定性,从而增大了电流的平均值,具有缩短充电时间、提高HCC充电电源充电速度的特点。

Stability of current control and precision of voltage control are the key technologies of high-voltage and constant current(HCC)charging power supply control system.In this paper,a new current closed-loop control method is proposed,which is applied in the charging power source based on battery packs connected in series(BPCSs).In this method,the maximum charging current is improved by using an algorithm of forward time sequence reconstruction and the average value of the current is increased.Firstly,the theoretical model of HCC charging power supply based on BPCSs is established,by which the voltage control method and the current control method are obtained.Secondly,the simulation models are set up in PSIM.Simulation results validate the effectiveness of the method.Finally,a prototype experiment is designed based on the simulation results.The experimental results verify the feasibility of the method in engineering application.This method ensures that the charging current can not only reach the peak value,but also maintain its stability,thus increasing the average value of the current.The method is featured by shortening the charging time and improve the charging speed of HCC charging power supply.