Electric compressor control system and method of automobile thermal management system

Abstract

The invention discloses an electric compressor control system of an automobile thermal management system, which is provided with an electric compressor, a passenger compartment refrigeration unit and a battery pack refrigeration unit. The output port of the electric compressor is connected with the refrigeration pipeline inlet of the passenger compartment refrigeration unit; and a refrigeration pipeline outlet of the passenger compartment refrigeration unit is connected with an inlet of the electric valve, the electric valve is provided with two outlets, one outlet is connected with a refrigeration pipeline inlet of the battery pack refrigeration unit, the other outlet is connected with an input port of the electric compressor, and a refrigeration pipeline outlet of the battery pack refrigeration unit is connected with the input port of the electric compressor. According to the electric compressor control system of the automobile thermal management system, the stepless speed regulation advantage of the electric compressor can be fully exerted, the requirements of passenger compartment refrigeration and battery thermal management for the rotating speed of the electric compressor are comprehensively considered, the rotating speed of the electric compressor is dynamically regulated, and frequent fluctuation of the rotating speed of the compressor is avoided.

Description

technical field [0001] The invention relates to the field of thermal management and control of new energy automobiles, in particular to the technical field of control of an electric compressor in a non-heat pump thermal management system. Background technique [0002] With the increasing popularity of new energy vehicles, although the heat pump thermal management system is considered to be the best thermal management solution for new energy vehicles, due to the complexity and higher cost of the heat pump thermal management system, it is limited by cost pressure. Non-heat pump thermal management systems still occupy a large proportion, especially for pure electric vehicle operating models with high cost pressure. [0003] For models equipped with non-heat pump thermal management systems, the cooling of the passenger compartment and the cooling of the battery pack rely on the same electric compressor to provide cooling output. Therefore, the speed demand of the electric compre...

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Problems solved by technology

[0002] With the increasing popularity of new energy vehicles, although the heat pump thermal management system is considered to be the best thermal management solution for new energy vehicles, due to the complexity and higher cost of the heat pump thermal management system, it is limited by cost pressure. Non-heat pump thermal management systems still occupy a relatively large proportion, especially for pure electric vehicle operating models with high cost pressure

[0003] For models equipped with non-heat pump thermal management systems, the cooling of the passenger compartment and the cooling of the battery pack rely on the same electric compressor to provide cooling output. Therefore, the speed demand of the electric compressor comes from two parts, namely, the cooling of the passenger compartment and the speed of the compressor. The demand for battery pack cooling and the reading demand of the electric compressor. Usually, the two systems are processed by the air conditioner controller and the VCU in separate file look-up tables. It will also cause fluctuations in the air temperature of the air conditioner and affect the comfort

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