整组欠压保护延时-PACK undervoltage protection delay

当电池组电压到达整组欠压保护电压时，持续时间达到整组欠压保护延时时间，保护板关闭放电开关

When the PACK voltage reaches the PACK undervoltage protection voltage, the duration reaches the PACK undervoltage protection delay time, and the BMS turns off the discharge switch.