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以锂离子电池为载体的电源系统为航天器稳定、可靠运行提供了一种有效的方式。通过多个电池单体的并联可扩大电池系统容量,即并联型电池系统。针对锂离子并联型电池系统的工作特性,因电池单体性能参数不一致而难以被准确表征的问题,分析各电池单体性能参数与电池系统性能参数的扩展关系及并联电路工作特性,提出一种基于SOC补偿器的并联型电池系统等效电路模型;在Matlab/Simulink环境下搭建电池系统仿真平台,通过仿真结果与实验数据对比分析验证所提出模型的准确性。
Lithium-ion battery-based power supply system for spacecraft stability and reliable operation provides an effective way. Through the parallel connection of a plurality of battery cells, the capacity of the battery system can be expanded, that is, the parallel battery system. Aiming at the characteristics of Li-ion parallel battery system, which is difficult to be accurately characterized due to inconsistent performance parameters of the battery, the relationship between the performance parameters of the battery cells and the performance parameters of the battery system and the operating characteristics of the parallel circuit are analyzed. The equivalent circuit model of parallel battery system based on SOC compensator is established. The battery system simulation platform is built under the environment of Matlab / Simulink, and the accuracy of the proposed model is verified by comparing the simulation results with the experimental data.