Electric vehicle motor waste heat utilization system and control method thereof

Abstract

The invention discloses an electric vehicle motor waste heat utilization system and a control method thereof, and the system enables a motor temperature control loop to be connected with a cooling liquid loop in a battery through a four-way valve, so that the two loops realize independent circulation or are connected in series into a circulation loop, and the motor waste heat is guided into the battery, and heats the battery. In addition, the system further comprises a refrigerant loop, outside the battery, which is matched with the cooling liquid loop in the battery to achieve temperature control over the power battery, and further comprises a passenger compartment temperature control loop. The control method comprises the steps of independent heating or cooling control of the passenger compartment, independent heating or cooling control of the power battery, simultaneous heating or cooling control of the passenger compartment and the power battery, and utilization control of motor waste heat in the heating process of the power battery. The motor waste heat is introduced into the power battery heat management loop, the control strategy is simple and effective, the system efficiency is improved, the energy consumption is reduced, and the endurance mileage of the whole vehicle is increased.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle heat management, and in particular relates to an electric vehicle motor waste heat utilization system and a control method thereof. Background technique [0002] With the rapid development of the manufacturing industry, people's requirements for environmental quality are also increasing. People no longer sacrifice the environment as the price of development, and the concept of sustainable development has been deeply rooted in the hearts of the people. As a typical representative of new energy vehicles, electric vehicles have become an important development direction of the automotive industry with the characteristics of not relying on oil, zero emissions, low carbon and environmental protection. The thermal management system is an integral part of the vehicle, whether it is a traditional fuel vehicle or an electric vehicle. It not only provides a comfortable driving environment for driver...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects in the above-mentioned prior art, the present invention provides a system for utilizing electric vehicle motor waste heat and its control method. On the basis of realizing the normal temperature control of the passenger compartment and the battery, the waste heat of the motor is also introduced into the heat management of the power battery In the loop, the control strategy is simple and effective, which solves the problem of low energy efficiency of the power battery under low temperature conditions, improves system efficiency, reduces energy consumption, and increases the cruising range of the vehicle

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