Thermal management system of electric automobile

Abstract

The invention discloses a thermal management system of an electric automobile. The thermal management system of the electric automobile comprises a compressor, an oil separator, an outside-automobile heat exchanger, an inside-automobile heat exchanger and a heat pump loop connected with a gas-liquid separator in a circulated mode. The heat pump loop is further respectively connected with a motor, a controller loop and a battery loop. The motor and the controller loop comprise the outside-automobile heat exchanger, a motor cooler, a controller cooler and a first water pump which are all connected in a circulated mode. The battery loop comprises the inside-automobile heat exchanger, a battery cooler and a second water pump which are all connected in a circulated mode. The thermal management system of the electric automobile is improved on the basis of an existing automobile heat pump system, the problem that a heat pump air conditioner system of an existing electric automobile is low in operation efficiency under the low-temperature work condition can be solved, the heating efficiency of the heat pump air conditioner system in winter is improved, and it is guaranteed that the temperature of a battery can not exceed the warning temperature in summer.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a heat management system for electric vehicles. Background technique [0002] Electric vehicles do not have the engine to provide waste heat for heating in winter, so the automotive air conditioning system is required not only to have the cooling function in summer, but also to undertake heating in winter. At present, the air conditioning system of electric vehicles on the market is mainly based on the electric heating auxiliary air conditioning system. Since electric heating is used for heating in winter, the maximum heating COP is 1, which consumes a lot of energy and reduces the cruising range of electric vehicles. [0003] At present, in order to improve the heating efficiency of electric vehicle heating in winter, there are also heat pump air-conditioning systems added to electric vehicles. Such as figure 1 As shown, the electric vehicle heat pump air conditioni...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a thermal management system for electric vehicles. This system can solve the problem of low operating efficiency of the existing electric vehicle heat pump air-conditioning system under low temperature conditions, and improve the efficiency of the heat pump air-conditioning system in winter. The heating efficiency is high, and it also ensures that the battery temperature will not exceed the warning temperature in summer

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