A car temperature control device and control method thereof

Abstract

The present invention provides an automobile temperature control device and a control method thereof. The method includes: S1. Real-time monitoring and acquisition of the first actual temperature value of the surface of the evaporator of the passenger compartment, the temperature value of the battery pack of the battery cooling system, and the temperature of the surface of the evaporator of the passenger compartment. Target temperature value, target temperature value of the battery pack; S2, judging whether there is cooling demand on the side of the passenger compartment according to the first actual temperature value and the target temperature value of the evaporator surface of the passenger compartment and according to the temperature value of the battery pack and the target temperature value of the battery pack to determine whether there is cooling demand on the battery side; S3, determine the rotation speed of the compressor and adjust the opening of the first electronic expansion valve and / or the second electronic expansion valve according to the determination result of the step S2. The invention can realize the precise distribution of the refrigerant, reduce the energy consumption of the system, and improve the economy of the whole vehicle.

Description

technical field [0001] The invention relates to the technical field of automobile temperature control, in particular to an automobile temperature control device and a control method thereof. Background technique [0002] With the increasing popularity of new energy vehicles, the requirements for the mileage of new energy vehicles are also increasing. However, due to the limitation of the vehicle space, the solution of increasing the battery volume is not very operable, so increasing the energy density of the power battery has become an effective solution that has been used in the industry to improve the cruising range of new energy vehicles. The energy density of the power battery is increased, and the accompanying problems are the large heat generation and high temperature of the battery, which have a negative impact on the battery's power and life. The battery cooling system is specially used to cool the battery in response to the above problems. It uses a plate heat exch...

AI Technical Summary

Problems solved by technology

In terms of cost control, the cost of the liquid cooling system will increase due to the need to add more components in the waterway; in terms of performance, in the liquid cooling system, most of the battery cooling uses a solenoid valve + thermal expansion valve throttling control system, thermal expansion Valves are mechanical components. In order to achieve optimal performance, thermal expansion valves with different openings need to be matched under different heat loads, which requires more research and development costs and has certain limitations in control accuracy.

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