Mode switching system and method for hybrid electric vehicle with function of external connection

Abstract

The invention provides a mode switching system and method for a hybrid electric vehicle with the function of external connection. The mode switching system comprises a manual button, a central processing unit, an electric motor flywheel rotating speed sensor, an engine flywheel rotating speed sensor, an engine controller and an electric motor controller, wherein the manual button is used for performing system mode manual switching by a driver; the central processing unit is used for receiving and transmitting electrical signals of the manual button, the electric motor flywheel rotating speed sensor, the engine flywheel rotating speed sensor, the electric motor controller and the engine controller; the electric motor controller is used for controlling the operation of an electric motor; the engine controller is used for controlling the operation of an engine; the electric motor flywheel rotating speed sensor is used for collecting a flywheel rotating speed signal of the electric motor; the engine flywheel rotating speed sensor is used for collecting a flywheel rotating speed signal of the engine. Through the adoption of the mode switching system disclosed by the invention, frequent charging processes and frequent discharging processes of an accumulator group are avoided, the service life of an accumulator is prolonged, and the operational efficiency of the accumulator is improved.

Description

technical field [0001] The invention belongs to the field of mode switching systems of hybrid electric vehicles, and in particular relates to a mode switching system and method for externally connected hybrid electric vehicles. Background technique [0002] The external rechargeable hybrid electric vehicle can charge the power battery equipped in the system by connecting to the household power supply or a dedicated power supply. After charging, only the battery can be used to drive the electric motor to drive the electric vehicle to run in pure electric mode. After the remaining power of the rechargeable battery is used up, the car can start the parallel or series hybrid mode of the internal combustion engine to continue driving, realizing the real sense of gasoline-electric hybrid, which can be "refueled" or "charged". Longer mileage with zero emissions, cleaner than conventional hybrids. [0003] Compared with ordinary hybrid vehicles, plug-in hybrid vehicles have two dif...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of the hybrid electric vehicle existing in the prior art that the life and efficiency of the battery pack are reduced due to the frequent deep charging and discharging process during the automatic switching process with the battery pack SOC as the threshold value, the present invention provides A mode switching system and method for an externally connected hybrid electric vehicle is provided, which realizes the driver's autonomous switching between "pure electric mode" and "pure fuel consumption mode", prolongs the life of the battery, and improves the working efficiency of the battery

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