Power supply control system and method for electric tractor hydrogen fuel cell and lithium battery

Abstract

The invention discloses a power supply control system and method for a hydrogen fuel cell and a lithium battery of an electric tractor, including a power supply device, a vehicle control system and a motor control system. The power supply device includes a hydrogen fuel cell power supply system, a lithium battery power supply system and Battery management module, the control output of the battery management module is connected to the control input of the hydrogen fuel cell power supply system and the lithium battery power supply system respectively, and the control output of the vehicle control system is respectively connected to the control input of the battery management module and the motor control system connection, the present invention integrates the remaining power of the lithium battery and the external demand power, thereby distributing the working conditions of the hydrogen fuel cell power supply system and the lithium battery power supply system, and at the same time makes the output power of the power supply device change dynamically with the change of the external load, improving the power supply. The utilization rate, thereby improving the battery life.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a power supply control system and method for a hydrogen fuel cell and a lithium battery of an electric tractor. Background technique [0002] The invention of electric tractors has greatly reduced the dependence of tractors on non-renewable resources such as diesel and gasoline, and reduced environmental pollution. However, limited by battery capacity, existing electric tractors cannot work for a long time, which greatly affects the development and promotion of electric tractors. In the combination mode, the lithium battery is used as the main power source, and the solar battery is used as the auxiliary power. However, it takes 7-8 hours to charge the lithium battery, but the working time is only 2-3 hours, which seriously affects the use and normal production needs. Contents of the invention [0003] The technical problem to be solved by the present invention i...

AI Technical Summary

Problems solved by technology

However, limited by battery capacity, existing electric tractors cannot work for a long time, which greatly affects the development and promotion of electric tractors. In the combination mode, the lithium battery is used as the main power source, and the solar battery is used as the auxiliary power. However, it takes 7-8 hours to charge the lithium battery, but the working time is only 2-3 hours, which seriously affects the use and normal production needs.

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