Overall heat management system for electric tractor and control method of system

Abstract

The invention provides an overall heat management system for an electric tractor and a control method of the system. The system comprises a power battery heat management system and a double-motor heatmanagement system. Heat exchange is achieved between a power battery and the double-motor heat management system through a heat exchanger. The control method of the overall heat management system forthe electric tractor comprises a power battery and double-motor heat management control method during operation of the tractor and a power battery heat management control method during charging of the tractor, wherein the power battery temperature grade and the double-motor critical working temperature as well as real-time temperature T of the power battery and real-time temperature Tmain' and Tauxilairy' of two motors measured by a temperature sensor are set as identification parameters, and a tractor state is combined to adjust a tractor heat management system mode. According to the systemand the method, the power battery, a main motor and an auxiliary motor are ensured to work at a proper temperature, so that the energy consumption of the battery is effectively reduced, and the continuous operation time of the tractor is prolonged.

Description

technical field [0001] The invention belongs to the technical field of vehicle heat management, and in particular relates to an electric tractor complete machine heat management system and a control method thereof. Background technique [0002] In recent years, environmental and energy issues have increasingly attracted global attention. Traditional fuel tractors have problems such as exhaust emissions, vibration, and noise pollution when operating, and are not suitable for operating in a closed greenhouse environment. Compared with traditional tractors, electric tractors are low-emission, green and clean, and flexible in control. The power source uses electric energy instead of fuel, which can effectively alleviate the energy crisis. [0003] Continuous operation time is one of the main bottlenecks restricting the development of electric tractors. In addition to developing power batteries with high energy density, ensuring that the drive motor and power batteries can work i...

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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides an electric tractor complete machine thermal management system and its control method, which can solve the problems of low heat dissipation efficiency of the power battery and unreasonable utilization of the heat of the motor, thereby ensuring efficient operation of the system, reducing power consumption, and increasing the power consumption of the tractor. continuous working time

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