Thermal management control method for electric vehicles

Abstract

The invention discloses a thermal management control method of an electric vehicle, comprising: when the temperature of the battery control circuit is lower than a first threshold, the first valve between the cooling main circuit and the first cooling branch circuit of the cooling power train control circuit is opened , the second valve between the cooling main circuit and the second cooling branch of the cooling battery control circuit is closed, the third valve between the first cooling branch and the second cooling branch is opened, and the cooling liquid and the battery control circuit are heated exchange to increase the temperature of the battery control loop; when the temperature of the battery control loop is between the first threshold and the second threshold, the second valve and the third valve are closed; when the temperature of the battery control loop is higher than the second threshold , the first valve and the second valve are opened simultaneously, the third valve is closed, the fourth valve connecting the first cooling branch circuit and the radiator circuit is opened and closed alternately with the fifth valve connecting the second cooling branch circuit and the radiator circuit. This method can not only improve the heat dissipation efficiency, but also make good use of the heat generated by the control loop of the power train.

Description

Technical field [0001] The present invention relates to the field of electric vehicles. More specifically, the present invention relates to a thermal management control method of an electric vehicle. Background technique [0002] The electric vehicle is an important form of new energy vehicles, with many advantages such as zero emissions, low cost, low noise, so there is a wide range of application prospects. The new energy vehicle cancels the traditional engine drive, which is driven by electric drive or oil-electricity. Electrical drive system components mainly include: main drive motors, motor controllers, and converters, etc. During the driving of the electric vehicle drive, the heat generation amount of the dynamic control circuit will be particularly large. The existing electric vehicle cooling system generally considers high temperature heat dissipation of the dynamic control circuit. However, in a low temperature environment, the battery discharge power is also greatly di...

AI Technical Summary

Problems solved by technology

However, in a low temperature environment, the battery discharge power will also be greatly reduced, affecting the mileage of the vehicle and seriously reducing the battery life.

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