说明：  实现电池的充放电功能，恒流充电、恒压放电，充电电流步进可调，步进值0.1A，电流控制精度6%。充电变换器的效率为85%。
(The charging and discharging function of the battery is realized, including constant current charging and constant voltage discharging. The charging current can be adjusted step by step, the step value is 0.1A, and the current control accuracy is 6%. The efficiency of the charging converter is 85%.)