整组欠压保护-Pack undervoltage protection voltage

电池组整组低压保护电压，当保护板检测到电池组电压低于整组欠压保护电压时，保护板关闭放电开关，停止放电

PACK under voltage protection voltage, when the BMS detects that the PACK voltage is lower than the PACK undervoltage protection voltage, the BMS closes the discharge switch and stops discharging.