Electric vehicle heat management system and method

Abstract

The invention discloses an electric vehicle heat management system and method. The electric vehicle heat management system comprises an electric drive assembly cooling loop, an air conditioning loop and a battery cooling and heating loop, wherein the battery cooling and heating loop communicates with the electric drive assembly cooling loop through a valve; and the battery cooling and heating loopcommunicates with the air conditioning loop through a heat exchanger. The electric vehicle heat management system has the advantages that the electric drive assembly cooling loop, the air conditioning loop and the battery cooling and heating loop of a vehicle system communicate with each other; and according to an actual vehicle state, the electric drive assembly cooling loop is controlled to radiate heat of a battery loop by using a low temperature heat radiator or to heat a battery at a low temperature by using heating after heat of an electric drive assembly; and therefore, the capacity utilization ratio is increased, and energy waste is reduced.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a thermal management system and method for new energy vehicles. Background technique [0002] With the increasing emphasis on environmental issues around the world, pure electric vehicles have been widely favored by all walks of life, and the development of electric vehicles is largely influenced by battery thermal management systems, electric drive assembly thermal management systems, and air-conditioning thermal management systems. Constraints on the technological maturity of the three major systems. An excellent vehicle thermal management system has a very significant contribution to reducing battery energy consumption, increasing cruising range, and improving vehicle reliability and comfort. [0003] At present, the existing electric vehicle thermal management system has independent circuits, which cannot make full use of the heat generated by the vehicle's heating compone...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing electric vehicle thermal management system has independent circuits, which cannot make full use of the heat generated by the vehicle's heating components, resulting in energy loss; and the structure is cumbersome, there are many components, and the control logic is complicated.

Unable to meet the vehicle's goal of reducing energy consumption under various environmental conditions, reducing the reliability of the vehicle's thermal management system and increasing costs

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