System and control method for realizing cooling medium exchange in range-extended vehicle

The invention relates to a system for realizing cooling medium exchange in a range-extended vehicle, comprising a first solenoid valve, a second solenoid valve and a third solenoid valve, wherein the first solenoid valve, the second solenoid valve and the third solenoid valve are all There are four ports, one of which is communicated with the other three ports, and the other three ports are not communicated with each other, which are used to fuse the pipe networks and media of different cooling systems; the system also includes a reversing valve, which is connected with the The water pumps are connected to each other for the forward and reverse exchange of the medium flow direction to form a medium exchange channel, and the inter-domain medium exchange is carried out through the water pump and the reversing valve. The present invention also relates to a control method for the cooling medium exchange of the extended-range vehicle. By adopting the system for realizing cooling medium exchange in the extended-range vehicle and the control method thereof of the present invention, the heating and heat preservation ability of the engine waste heat to the battery in severe cold regions is improved; the efficiency and thermal energy utilization rate of the heat coordination system of the whole vehicle are improved; Heat exchange efficiency and real-time performance of the circulation subsystem.