一种空间锂离子电池非耗散型均衡方法

针对空间锂离子电池串联使用的单体电压均衡问题,文章提出一种应用双向反激DC/AC变换器的非能量耗散型均衡控制方法。串联锂离子电池中容量较高的单体能量可以通过DC/AC变换器,在时序脉冲的控制下,经过公用母线进入容量较低的单体,从而实现单体之间电压的均衡。通过对变压器副边电压的分时采集可提供单体电压遥测,避免了高共模电压条件对测量带来的影响。文章利用Multisim软件对所提出的方法的功能和性能进行了仿真分析,结果证明了其有效性。

Research on Non-dissipative Cell Equalizer for Space Lithium-ion Battery

Lithium-ion （Li-ion） batteries have a higher power density and can operate at a higher state of charge （SOC） compared with the Nickel Hydrogen （NiH2） batteries commonly used on spacecraft. This reduces the launch mass of the EPS （Electrical Power System）. This paper describes a Lithium-ion battery cell Equalization method, which employs bi-directional forward DC-AC converters, plus a unique common node ＂Share Bus＂ to provide autonomous charge distribution, until all the cells of the battery are balanced at the same voltage. It also includes individual cell voltage monitoring, telemetry data： Multisim is used to analyses the function and performance, simulation result proves that the method is effective for Lithium-ion battery equalization.