High voltage control method for hybrid electric vehicles as well as device and electronic device thereof

Abstract

The invention provides a high voltage control method for hybrid electric vehicles as well as a device and an electronic device thereof, wherein the method is applied to a vehicle control unit, which is respectively connected with a motor controller and a battery management system through rigid lines. The method comprises the following steps: a rigid line signal is switched from low potential to high potential when a start instruction is detected and the high potential is transmitted to the motor controller and the battery management system for starting the motor controller and a battery controller in the batter management system and enabling a battery main relay in the battery management system to be closed; and the rigid line signal is switched from the high potential to the low potentialwhen a stop instruction is detected and the low potential is transmitted to the battery management system and the motor controller for enabling the battery main relay to be opened and the motor controller to execute the electric discharge operation. The method can avoid the problems that vehicles can not be started normally or driven for a long time and drivers are easy to get electric shocks caused by the failures in the controllers or controller area network (CAN) communication and improve the safety of the hybrid electric vehicles.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a high-voltage control method, device and electronic equipment for a hybrid electric vehicle. Background technique [0002] When the hybrid vehicle is working normally, the high-voltage battery pack provides high-voltage power supply for the vehicle to ensure the normal operation of high-voltage components such as the drive motor, high-voltage air conditioner, and high-voltage heater. The active discharge is completed in time, so that the high-voltage system of the vehicle stops working quickly, thereby reducing the risk of electric shock. [0003] When the high-voltage battery controller in the battery management system fails, the opening and closing of the main relay of the battery management system will not be controlled, resulting in abnormal high-voltage discharge or power-off. If the relay cannot be turned off, there will be no high voltage in the system, ...

AI Technical Summary

Problems solved by technology

[0003] When the high-voltage battery controller in the battery management system fails, the opening and closing of the main relay of the battery management system will not be controlled, resulting in abnormal high-voltage discharge or power-off, etc.

If the relay cannot be closed, the system will not have high voltage, which will cause the high-voltage system to fail to work and the 12V low-voltage system to fail to work for a long time

If the relay cannot be opened, the system cannot be powered off at high voltage and there is a risk of electric shock

[0004] When a collision or other reasons cause damage to the CAN (Controller Area Network) bus of the vehicle, the battery management system and the motor controller cannot judge the dangerous working conditions because they cannot receive signals, and electric shock hazards are more likely to occur

[0005] Therefore, when the controller fails in the high-voltage system of the hybrid vehicle, or the CAN network communication fails, the vehicle will not be able to start normally or drive for a long time, and it is prone to electric shock hazards

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