Refrigerating capacity distribution method and system for battery cooling and passenger compartment refrigeration

Abstract

The invention discloses a refrigerating capacity distribution method and system for a battery liquid cooling system and passenger compartment refrigeration. An electric proportional three-way valve is arranged, the flow of cooling liquid flowing through the battery cooler side is reasonably controlled, then the heat load of the battery cooler side is adjusted, distribution of refrigerants in a double-evaporation system is achieved, and the refrigerating capacity of the whole air conditioning system is reasonably distributed for battery cooling and passenger compartment refrigeration. According to the invention, the battery can work in a proper temperature range, and the refrigeration and thermal comfort of the whole vehicle is basically not influenced by liquid cooling of the battery. The thermal safety of the battery is improved, the comfort of a passenger compartment is improved, the structure is simple, the cost is low, and calibration is easy.

Description

technical field [0001] The invention relates to the technical field of battery cooling of new energy vehicles, in particular to a cooling capacity distribution method and system for battery cooling and passenger cabin cooling. Background technique [0002] With the increasing popularity of new energy vehicles (such as pure electric vehicles and hybrid vehicles), the requirements for the cruising range of new energy vehicles are also increasing. However, due to the limitation of the space of the whole vehicle, the solution of increasing the volume of the battery is not very operable, so increasing the energy density of the power battery has become the main solution to improve the cruising range of new energy vehicles in the industry. As the energy density of the power battery increases, the heat generated by the battery will increase accordingly, which will lead to an increase in temperature, which will have an adverse effect on the battery's power and life. In order to solv...

AI Technical Summary

Problems solved by technology

The use of the above electronic expansion valve technical solution requires the cooperation of pressure and temperature sensors, which will increase the cost of the system

Moreover, the control strategy of the electronic expansion valve is complicated, and the calibration period is long. When the working environment of the system changes, if the control parameters are not adjusted properly, the valve body may move frequently and the system is unstable, which will affect the robustness of the system.

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