A heating system for an electric vehicle and a thermal management control method for an air-cooled battery box

Abstract

The invention discloses a heating system for an electric vehicle. The heating system for the electric vehicle comprises a control unit, a heat-conducting liquid heating unit, a three-way solenoid valve, a cell cabin unit and a passenger cabin unit, wherein the cell cabin unit comprises a first heat exchanger module, a cell cabin module and a channel arranged between and connected with the heat exchanger module and the cell cabin module; the first heat exchanger module comprises a shell, a heat exchange pipeline and a first fan; the cell cabin module comprises a cabin, a battery pack, a first temperature sensor, a second temperature sensor, a third temperature sensor and a second fan; the passenger cabin unit comprises a passenger cabin, a second heat exchanger mounted at the side of the passenger cabin and a fourth temperature sensor used for detecting temperature in the passenger cabin; and the control unit is used for controlling automatic switching of the passenger cabin unit for connection with the cell cabin unit and the passenger cabin unit according to the signals of the first, second, third and fourth temperature sensors so as to control temperature in the cell cabin unit and the passenger cabin unit. The invention also provides a control method for the system.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle heating system and a control method thereof. Background technique [0002] With the development of society and the advancement of science and technology, electric vehicles have the characteristics of energy saving and environmental protection. Electric vehicles have been widely promoted and used. Power batteries as their power source directly affect the overall performance of vehicles. At present, the heating method of the battery pack is mostly electric heating, that is, a PTC heating unit is installed inside the battery pack, and the battery pack supplies power to the PTC heating unit, converts electric energy into heat energy, and transfers the heat to the battery pack itself through heat conduction. Thereby increasing the temperature of the battery pack. At present, there are two common air cooling methods for power battery cooling. One is to us...

AI Technical Summary

Problems solved by technology

[0003] The prior art has the following problems: Although the above heating method can achieve the effect of heating the battery pack, the battery pack is heated at low temperature by consuming the energy of the battery pack, which affects the service life of the battery pack and the mileage of the electric vehicle. The heating method has a low heating rate and a long heating time

The heating device of an electric vehicle is usually powered by a battery pack. This method consumes the energy of the battery pack and affects the cruising range of the electric vehicle.

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