Multi-heat-source heat pump type electric vehicle heat management system based on phase change heat storage

Abstract

The invention provide a multi-heat-source heat pump type electric vehicle heat management system based on phase change heat storage. A phase change heat storage unit is additionally arranged in a power assembly heat dissipation pipeline, the number, form and time differences of energy in supply and demand are overcome, efficient heating and cooling of an electric vehicle can be achieved, the mode that an air source heat pump is combined with a water loop heat pump is adopted, the water loop heat pump mode is switched to operate under the extremely low-temperature working condition, and a series of problems caused by the air source heat pump can be avoided. Three electric vehicle heat management subsystems are organically integrated, the valve control operability is high, the component structures are compact, and the integration degree is high; in a passenger compartment heat management, a water-cooled condenser is adopted as a heat release device of a refrigerating circuit, and the problems that a condenser used at present is generally large in size and large in occupied space can be solved; and in addition, a phase change heat storage device can reduce the area of a radiator at the front end, so that the windward area can be reduced, the wind resistance is reduced, and the endurance mileage is increased.

Description

technical field [0001] The invention relates to a thermal management system of an electric vehicle, in particular to a multi-heat source heat pump type electric vehicle thermal management system based on phase change heat storage. Background technique [0002] Electric vehicles are the main trend of the future development of the automobile industry. At present, the mileage of electric vehicles, especially in winter, has become an important factor hindering the development of electric vehicles. As the core components of electric vehicles, batteries, motors, electronic control units, and air-conditioning systems are closely related to the above problems, and the factor that has the greatest impact on their performance is temperature. Service life, reducing battery energy consumption, and improving vehicle reliability and comfort play a decisive role. [0003] For the thermal management module of the passenger compartment of electric vehicles, low-temperature heating in winter...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-heat source heat pump type electric vehicle thermal management system based on phase change heat storage, realize the air source heat pump through the first joint heat exchange module, and use the second joint heat exchange module to integrate the thermal management of the passenger compartment and The thermal management of the battery, plus the integration of the thermal management of the battery and the thermal management of the powertrain through the water-cooled condenser, realize the integration of the three major subsystems, and use the phase change heat storage technology to overcome the quantity, form and time of energy in supply and demand. The difference, while solving the defects of the traditional single air source heat pump and water ring heat pump, reduces the volume, thereby saving space and increasing the space of the passenger compartment

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