Energy coupling control method of plug-in electric vehicle in series

Abstract

The invention discloses an energy coupling control method of a plug-in electric vehicle in series. A control system is mainly composed of a main controller, a drive motor controller, an engine generator set, a lithium battery controller, a driver pedal and the like. The control process is as follows: when a driver has torque requirements, the main controller sends a torque requirement order to the drive motor controller, the drive motor controller detects the real torque of the motor and sends the real torque to the main controller, and the numerical value thereof is controlled between a maximum allowed torque and a minimum allowed torque. The safe control of a closed loop can be realized through the information interaction of the main controller and the drive motor controller. Meanwhile, the lithium battery controller transfers battery electric quantity information and battery voltage information to the main controller by CAN communication so as to judge whether the lithium battery has enough power release. The method can reasonably utilize energy in the energy coupling mode under the condition of different torque requirements, and improves finished automobile dynamic property and economy.

Description

technical field [0001] The invention belongs to the field of vehicle control, and in particular relates to a method for distributing electrical energy for driving the vehicle under different torque requirements. Background technique [0002] Energy crisis and environmental deterioration are two major factors restricting economic development. Research on energy-saving and environmentally friendly new energy vehicles is one of the effective means to solve the above problems, among which series plug-in electric vehicles are currently the hotspot of research and development. The main principle of the electric vehicle is: the driving motor is powered by the lithium battery to drive the vehicle. When the energy of the lithium battery is insufficient, the engine needs to be started to drive the generator to generate electricity, and the electricity generated is used to drive the motor to keep the vehicle running. Due to the various operating conditions of the vehicle and the vario...

AI Technical Summary

Problems solved by technology

Therefore, it cannot meet the needs of the driver in all working conditions, and greatly reduces the handling and power of the vehicle.

Another solution is: in order to meet the torque requirements under all working conditions, a lithium battery with a large energy density and an engine generator set with a large power output are used, which increases the weight and cost of the vehicle

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