CROSS-REFERENCE TO RELATED APPLICATIONS

The present disclosure a national phase entry under 35 U.S.C. § 371 of International Application No. PCT/CN2018/108785, filed on Sep. 29, 2018, which claims priority to and benefits of Chinese Patent Application No. 201710940351.4, filed by BYD Co., Ltd. on Sep. 30, 2017 and entitled “TEMPERATURE ADJUSTMENT METHOD AND TEMPERATURE ADJUSTMENT SYSTEM FOR VEHICLE”, content of all of which is incorporated herein by reference in its entirety.

FIELD

The present disclosure relates to the field of automobile technologies and, in particular, to a temperature adjustment method for a vehicle and a temperature adjustment system for a vehicle.

BACKGROUND

Currently, performance of a vehicle-mounted battery of an electric vehicle is affected by a climatic environment greatly, and an excessively high or excessively low ambient temperature affects the performance of the vehicle-mounted battery. Therefore, a temperature of the vehicle-mounted battery needs to be adjusted, so that the temperature of the vehicle-mounted battery is maintained within a preset range.

Currently, for a region whose climatic environment is hot, a battery cooling system needs to be added to an electric vehicle, so as to reduce a temperature of a vehicle-mounted battery when the temperature of the vehicle-mounted battery is excessively high; and for a region whose climatic environment is cold, a battery heating system needs to be added to the electric vehicle, so as to increase the temperature of the vehicle-mounted battery when the temperature of the vehicle-mounted battery is excessively low.

However, for a region that is hot in summer and cold in winter, the foregoing method cannot resolve both of problems of the excessively high temperature and the excessively low temperature of the vehicle-mounted battery, and a method for adjusting a temperature of a vehicle-mounted battery is relatively crude. When cooling processing is performed on the battery, it cannot be ensured that the temperature of the vehicle-mounted battery is maintained within a preset range, and an intra-vehicle refrigerating effect cannot be ensured either.

SUMMARY

The present disclosure proposes a temperature adjustment method for a vehicle according to an embodiment. By adjusting opening degrees of an intra-vehicle cooling branch and a battery cooling branch, the method may quickly adjust a temperature of a vehicle-mounted battery when the temperature is excessively high or excessively low, thereby maintaining the temperature of the vehicle-mounted battery within a preset range, and avoiding a case of affecting performance of the vehicle-mounted battery because of the temperature, and may further make an intra-vehicle temperature satisfy a requirement if the temperature of the battery satisfies a requirement.

The present disclosure further proposes a temperature adjustment system for a vehicle according to an embodiment.

According to an embodiment in an aspect of the present disclosure, a temperature adjustment method for a vehicle is proposed, including the following steps: obtaining a required power and an actual power used for performing temperature adjustment on a battery; and adjusting an opening degree of an intra-vehicle cooling branch and an opening degree of a battery cooling branch according to the required power, the actual power, an intra-vehicle temperature, and an air conditioner set temperature.

In the temperature adjustment method for a vehicle according to this embodiment of the present disclosure, a required power used for performing temperature adjustment on a battery is first obtained; an actual power used for performing temperature adjustment on the battery is then obtained; and an opening degree of an intra-vehicle cooling branch and an opening degree of a battery cooling branch are finally adjusted according to the required power, the actual power, the intra-vehicle temperature, and the air conditioner set temperature. Therefore, by adjusting the opening degrees of the intra-vehicle cooling branch and the battery cooling branch, the method may quickly adjust the temperature of the vehicle-mounted battery when the temperature is excessively high or excessively low, thereby maintaining the temperature of the vehicle-mounted battery within a preset range, and avoiding a case of affecting performance of the vehicle-mounted battery because of the temperature, and may further make the intra-vehicle temperature satisfy a requirement if the temperature of the battery satisfies a requirement.

According to an embodiment in another aspect of the present disclosure, a temperature adjustment system for a vehicle is proposed, including: a compressor; a condenser connected to the compressor; an intra-vehicle cooling branch connected between the compressor and the condenser; a battery cooling branch connected between the compressor and the condenser; and a battery temperature adjustment module connected to the battery cooling branch, and configured to: obtain a required power and an actual power used for performing temperature adjustment on a battery; obtain an intra-vehicle temperature of a vehicle and an air conditioner set temperature; and adjust an opening degree of an intra-vehicle cooling branch and an opening degree of a battery cooling branch according to the required power, the actual power, the intra-vehicle temperature, and the air conditioner set temperature.

The temperature adjustment system for a vehicle according to this embodiment of the present disclosure obtains, through the battery temperature adjustment module, the required power and the actual power used for performing temperature adjustment on the battery, obtains the intra-vehicle temperature of the vehicle and the air conditioner set temperature, and adjusts the opening degrees of the intra-vehicle cooling branch and the battery cooling branch according to the required power, the actual power, the intra-vehicle temperature, and the air conditioner set temperature. Therefore, by adjusting the opening degrees of the intra-vehicle cooling branch and the battery cooling branch, the system may quickly adjust the temperature of the vehicle-mounted battery when the temperature is excessively high or excessively low, thereby maintaining the temperature of the vehicle-mounted battery within a preset range, and avoiding a case of affecting performance of the vehicle-mounted battery because of the temperature, and may further make the intra-vehicle temperature satisfy a requirement if the temperature of the battery satisfies a requirement.

