A temperature management device used to perform temperature management on a battery pack cooled by a refrigerant, wherein the temperature management device comprises:
- a first port configured to detachably connect to a refrigerant outlet of the battery pack;
- a second port configured to detachably connect to a refrigerant inlet of the battery pack;
- a compressor having an inlet and an outlet;
- a condenser having an inlet and an outlet, wherein the inlet of the condenser is connected to the outlet of the compressor;
- a first valve and a second valve, wherein the first valve is connected to the outlet of the condenser and the second port, and the second valve is connected to the first port and the inlet of the compressor;
- a pressure regulating valve, wherein a first end of the pressure regulating valve is connected to the first port, a second end of the pressure regulating valve is connected to an inlet of the compressor, and the pressure regulating valve is configured to regulate pressure of gas discharged from the refrigerant outlet of the battery pack so that a pressure value of gas discharged from the second end of the pressure regulating valve to the inlet of the compressor is within a preset range;
- an expansion valve, wherein the expansion valve is an H-type thermal expansion valve comprising a first inlet, a first outlet, a second inlet, and a second outlet, the first inlet is connected to the outlet of the condenser through the first valve, the first outlet is connected to the second port, the second inlet is connected to the first port, the second outlet is connected to the first end of the pressure regulating valve through the second valve, the expansion valve is configured to:
- allow gas discharged from the refrigerant outlet of the battery pack to be discharged through the second outlet of the expansion valve;
- and
- adjust, based on the gas discharged from the refrigerant outlet of the battery pack, a refrigerant discharged from the first outlet of the expansion valve;
- a monitoring device, wherein the monitoring device is connected to the first port and the second port and configured to monitor a state of the refrigerant at the first port and the second port, and the monitoring device comprises at least one sight glass, at least one temperature sensor, and at least one pressure sensor, the at least one pressure sensor comprises a first pressure sensor disposed between the pressure regulating valve and the first port and configured to monitor pressure of the refrigerant entering the pressure regulating valve;
- and
- an adjustment assembly comprising a capillary tube and an electromagnetic valve, wherein an inlet of the electromagnetic valve is connected to the outlet of the condenser and the first valve, and an outlet of the electromagnetic valve is connected to the inlet of the compressor via the capillary tube and connected to the second end of the pressure regulating valve, the adjustment assembly is configured to:
- increase a proportion of the refrigerant entering the first inlet of the expansion valve to the refrigerant discharged through the outlet of the condenser if pressure of the gas at the first end of the pressure regulating valve is higher than the preset range;
- and
- decrease the proportion of the refrigerant entering the first inlet of the expansion valve to the refrigerant discharged through the outlet of the condenser if pressure of the gas at the first end of the pressure regulating valve is lower than the preset range.