基于智能控制的锂电池快速充电方法研究

Research on Lithium-ion Battery Fast Charge System Based on Intelligent Control

针对电动汽车不能实现快速的电能补充以及电池充电过程中存在的非线性、时变性和不确定性导致充电过程不稳定的问题。本文设计了一种基于模糊自适应PID控制的快速充电方法,在充电过程中引入了电压降补偿,并分别对锂电池充电系统的电流内环和电压外环进行控制,使实际充电曲线更加接近马斯曲线。理论分析和仿真实验表明,该充电方法加快了蓄电池充电速度,且具有稳定性好等优点。

Because rapid power supplement of electric vehicles can not be achieved and nonlinear, time-varying and uncertainty in the process of battery charging lead to the problem of unstable charging process, an improved fast charging method based on fuzzy adaptive PID algorithm is designed. During the charging process, the voltage drop compensation is introduced, and the inner loop of current and the outer loop of voltage of the lithium battery charging system are controlled respectively, which makes the charging curve closer to the Mas charging curve. The theoretical analysis and simulation results show that the charging method can accelerate the charging speed of the battery, and has the advantages of good stability and high charging efficiency.