Passenger compartment priority refrigeration control method for pure electric vehicle heat management system

Abstract

The invention discloses a passenger compartment priority refrigeration control method for a pure electric vehicle heat management system. The method is characterized by comprising the following steps:1) entering a simultaneous refrigeration mode, and starting an electric refrigeration system and a battery cooling water loop; 2) entering a passenger compartment priority refrigeration mode, and closing the battery cooling water loop; 3) keeping entering the passenger compartment priority refrigeration mode; 4) quitting the simultaneous refrigeration mode, and restarting the battery cooling water loop; 5) keeping quitting the simultaneous refrigeration mode; and 6) repeatedly circulating step 2) and step 4) until the simultaneous refrigeration mode is quitted. On the premise that the safetyof the power battery is guaranteed, the refrigeration requirement of the passenger compartment is preferentially guaranteed; and the system is frequently switched, so the running stability of the system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of automobile thermal management, in particular to a priority cooling control method for a passenger compartment of a pure electric vehicle thermal management system. Background technique [0002] As countries around the world pay more and more attention to environmental and energy issues, pure electric vehicles have been widely favored by all walks of life. However, the development of pure electric vehicles is still in its infancy, and there are many key problems to be solved. Constraints on the technical maturity of the management system. 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] In the existing pure electric vehicle thermal management system, the battery circuit and the air conditioning circuit share the refrigerant. Because the performance o...

AI Technical Summary

Problems solved by technology

Because the performance of the power battery has a great relationship with the temperature, high temperature will aggravate the risk of thermal runaway and safety risk. In order to reduce the safety risk, the cooling capacity of the whole vehicle is fully allocated to the battery cooling circuit to reduce the battery temperature. When the battery temperature reaches the safe range, Only then will it begin to meet the needs of the passenger compartment, thereby reducing the cooling effect of the passenger compartment, resulting in the slow cooling speed of the passenger compartment, which seriously affects the comfort of the vehicle

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