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

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of thermal management systems for new energy vehicles, in particular to a system for realizing cooling medium exchange in a range-extended vehicle and a control method thereof. Background technique [0002] At present, in order to save energy, new energy vehicles have carried out a variety of comprehensive thermal management technology exploration and application. The common design is the combined design of pipeline and cooling system, and heat exchangers are used to transfer heat between different pipelines. The purpose is to integrate the heat dissipation or heating requirements between different systems or components and reduce energy waste. However, the current problems are: 1. Due to the limitation of the number of pipe network components, the size and change of the heat load of different components, the efficiency of the heat coordination system is not high; 2. The combination of the pipeline system re...

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Problems solved by technology

However, the current problems are: 1. Due to the limitation of the number of pipe network components, the size and change of heat load of different components, the efficiency of the heat coordination system is not high; 2. The merger of pipeline systems requires the combined system to have a matching temperature control range limit ; 3. The scale of grid connection is limited, due to the complexity of grid connection, pipeline system layout, structure, resistance, fluid flow power, etc.; 4. Some thermal management systems must have complete thermal management functions, and cannot be used for pipe network components 5. Using heat exchangers to carry out heat exchange between different thermal cycle systems is not efficient and has poor real-time performance; 6. The thermal management capability of the independent temperature control system cannot be fully utilized, and there are problems of capacity waste and inefficient operation Happening

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