Battery pack direct cooling test device

The invention discloses a battery pack direct cooling test device which comprises a rack, a compressor, a four-way reversing valve, a condenser, an evaporator and a heat exchanger are arranged on the rack, the compressor is connected with a controller, the four-way reversing valve is provided with a compressor exhaust valve port, a condenser valve port, an evaporator valve port and a compressor air return valve port, and the heat exchanger is arranged at the bottom of a battery pack. The heat exchanger is provided with a first self-closing type quick connector and a second self-closing type quick connector, and the first self-closing type quick connector and the second self-closing type quick connector are communicated with valve ports of the condenser and the evaporator respectively. The refrigerant can directly enter the heat exchanger to realize the rapid heating and rapid cooling functions of the battery pack, so that the charging and discharging performance of the battery pack under different high and lo