A high-voltage power supply control method for hybrid vehicles

Abstract

The invention provides a high-voltage power supply control method for a hybrid power vehicle. The method comprises the following steps that the discharge capacity and fault state information of a high-voltage battery pack of the hybrid power vehicle are acquired; whether the discharge capacity of the high-voltage battery pack is lower than a preset threshold value or not is judged, or whether thehigh-voltage battery pack breaks down or not is judged; after the discharge capacity of the high-voltage battery pack is confirmed to be lower than the preset threshold value or the high-voltage battery pack breaks down, even shifts are disengaged and are switched to odd shifts for power output, and meanwhile, high-voltage power utilization components and a high-voltage-to-low-voltage inverter arestopped; a second clutch is connected to allow an engine to drive a motor to rotate, and a rotor of the motor is enabled to output stable high voltage by cutting magnetic induction lines; and power is supplied to the high-voltage power utilization components and the high-voltage-to-low-voltage inverter by utilizing a stable high voltage. According to the scheme of the method, the power supply problem of high-voltage parts can be solved, normal operation of the high-voltage-to-low-voltage inverter can be guaranteed, and therefore the normal operation of a low-pressure system of the whole vehicle can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of high-voltage power consumption of hybrid electric vehicles, in particular to a high-voltage power supply control method for hybrid electric vehicles. Background technique [0002] The power source of the hybrid vehicle has two parts: the engine drive and the motor drive, and the low-voltage power consumption of the whole vehicle is provided by the 12V battery. In normal mode, the high-voltage battery charges the 12V battery through the high-voltage to low-voltage inverter, but when there is a problem with the high-voltage system, the vehicle enters limp mode, and the engine alone is used to drive the vehicle. At this time, a problem with the high-voltage system prevents the high-voltage to low-voltage inverter from charging the 12V battery, and the long-term driving of the vehicle will cause the 12V battery to feed power. Moreover, because there is no high-voltage power supply, the high-voltage electrica...

AI Technical Summary

Problems solved by technology

[0004] One purpose of the present invention is to solve the technical problem of being unable to provide high voltage to high-voltage electrical components and unable to charge 12V batteries when a problem occurs in the high-voltage power supply system

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