Control method for preventing battery overcharge of hybrid electric vehicle at low temperature, terminal and medium

Abstract

The invention discloses a control method for preventing battery overcharge of a hybrid electric vehicle at low temperature, a terminal and a medium. The method comprises the steps: obtaining a battery charging power limit value, and calculating a generator torque limit value according to the battery charging power limit value; determining an engine torque limit value according to the generator torque limit value, and sending a corresponding engine torque instruction to an engine controller according to the engine torque limit value; and obtaining the real-time torque of the engine, determining the rotating speed of the generator according to the real-time torque, and sending a corresponding generator rotating speed instruction to the generator controller according to the rotating speed of the generator, so as to control the real-time rotating speed of the generator within the determined rotating speed. The output power of the generator is limited by limiting the torque of the generator, and a traditional generator rotating speed control mode is improved into a rotating speed control and torque limiting mode, so that it is guaranteed that a battery is not overcharged in the process that a driver loosens an accelerator pedal, and the problem that the battery of the hybrid electric vehicle is overcharged in the low-temperature environment is solved.

Description

Technical field [0001] The present invention relates to the field of new energy vehicles, in particular, is a control method, terminal, and medium of a hybrid vehicle lower temperature under low temperature. Background technique [0002] The engine of the serial hybrid vehicle is only used to generate electricity, and the generator and the engine are connected to the engine-generator set, the generator output torque controls the engine speed, thereby converting mechanical energy into electrical energy, or providing the drive motor Energy, or charging power battery. If the torque of the generator is lower than the engine's torque, the engine accelerates, occurs in the engine start and power increase; if the torque of the generator is higher than the engine's torque, the engine decelerates, the engine power reduction and the stop phase. [0003] There is a special working condition that occurs on the driver to release the accelerator pedal (this condition will appear frequently in ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that, aiming at the defects of the prior art, the present invention provides a control method, terminal and medium for preventing battery overcharging of a hybrid electric vehicle at low temperature, so as to solve the problem of battery overcharging of the existing hybrid electric vehicle in a low temperature environment. overcharging technical problem

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