一种稳定快速充电电流的控制算法介绍

An introduction of algorithm about stabilizing charging current in fast charging

快速充电要求充电电流的大小随着蓄电池可接受电流的能力而改变。由于极化电势的存在,其接受能力以马斯曲线式下降,这就要求充电电流大小实时改变。传统的PI调节控制算法在占空比发生改变时,充电电流易产生误差。为了更精确地实现快速充电电流的转换,介绍了一种新的协同控制算法。这种算法是由前向反馈控制、多相循环控制、非线性PI控制和PD控制组成。通过仿真实验将其与传统PI控制做了对比,验证了此算法的有效性。

The technology of fast charging requires charge value changing with the acceptability of cell.Because of polarization voltage,the acceptability reduces as J.A.Mass curve in charging,so the current will be changed at real-time.The conventional PI controller law easily produces error in controlling duty cycles.A novel strategy for improving exactness current in fast charging was presented.The new law was made up of feed-forward control,multi-loop control,and nonlinear PI and PD controls.At last,the law was validated,compared with conventional PI controller law adopting Matlab/Simulink.