Electric vehicle external air conditioning system, control method and electric vehicle

Abstract

The invention relates to the field of electric vehicles, and provides an external air-conditioning system for the electric vehicle, a control method and the electric vehicle. The external air-conditioning system includes a grid and a fan, and the external air-conditioning system also includes: a heat exchanger, a battery radiator, a temperature sensor, and a controller, wherein the heat exchanger and the battery radiator are located at the between the grid and the fan; the temperature sensor is connected to the heat exchanger and connected to the battery radiator; the controller is used to detect the The temperature of the heat exchanger and the battery radiator; when the temperature of the battery radiator is higher than the temperature of the heat exchanger, the fan is controlled to rotate, and the temperature of the battery radiator is sent to the heat exchanger through the wind The heat exchanger is used to heat the heat exchanger, which can improve the heating performance of the air conditioner and prevent frosting at the same time.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an external air-conditioning system for an electric vehicle, a control method and the electric vehicle. Background technique [0002] Since pure electric vehicles do not have an engine at present, they cannot use engine hot water preheating for heating. At present, heat pump technology is often used to solve the problem of the air conditioning system, that is, the heat exchanger is converted between the evaporator and the condenser. However, due to the relatively cold weather in winter, the outdoor heat exchanger cannot absorb a large amount of heat, resulting in poor heating of the cab, and it is also difficult to defrost after frost. At present, technologies such as PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor), dual heat pumps or energy storage tanks are often used to assist defrosting, but each has the problems of large power co...

AI Technical Summary

Problems solved by technology

However, due to the relatively cold weather in winter, the outdoor heat exchanger cannot absorb a large amount of heat, resulting in poor heating of the cab, and it is also difficult to defrost after frost

At present, technologies such as PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor), dual heat pumps or energy storage tanks are often used to assist defrosting, but they have the problems of large power consumption, high cost and poor defrosting effect.

Images