Control method and system for whole electric truck thermal management system

Abstract

The invention discloses a control method for a whole electric truck thermal management system. The control method comprises the steps of obtaining the current temperature Tc0 and the target temperature Tc1 of a cab; acquiring a current battery temperature Tb0 and a target battery temperature Tb1 of the battery management control system; according to the values of the current cab temperature Tc0, the target cab temperature Tc1, the current battery temperature Tb0 and the target battery temperature Tb1, calculating the target rotating speed of a compressor in a refrigerant system management module, and controlling the rotating speed of the compressor according to the target rotating speed; and calculating the target opening degree of a refrigerant electronic expansion valve according to the difference value between the cab target temperature Tc1 and the target battery temperature Tb1, and controlling refrigerant distribution of a battery heat management refrigerant control system and an air conditioner heat management system according to the target opening degree. The working temperature of the battery can be reasonably controlled, the problem that the service life of the power battery is short is solved, and energy consumption of a whole vehicle air conditioner and battery heat management is reduced.

Description

technical field [0001] The invention relates to the technical field of vehicle air conditioners, in particular to a method and system for controlling the thermal management of an electric truck vehicle. Background technique [0002] In recent years, electric trucks have become more and more popular. The thermal management system of electric trucks is mainly composed of three major thermal management systems: air conditioning system, battery thermal management system and electronically controlled cooling system. At present, many technologies in the field of electric trucks are immature. Only the battery pack is used as the energy source. During the independent operation of the three major thermal management systems, the layout space requirements are high, and the degree of common use of parts is low, which in turn wastes a lot of battery power. Due to the complex operating conditions of electric trucks, automotive battery packs need to withstand harsh environmental impacts su...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a control method for the thermal management system of the electric truck, so as to solve the problem of the large volume of the original independent battery thermal management host, the low degree of universalization of components, the low service life of the power battery, and the thermal problems of the vehicle air conditioner and battery. Manage high energy consumption issues

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