Power distribution system and method of hybrid electric vehicle

Abstract

The invention relates to the technical field of hybrid electric vehicles, in particular to a power distribution system and method of a hybrid electric vehicle. The system comprises a controller, an isolating switch, a power distribution control module, a high-voltage power source power distribution module connected with a first wiring contact of the isolating switch, and a low-voltage power sourceconnected with a second wiring contact of the isolating switch, wherein the isolating switch and the power distribution control module are connected with the controller. The high-voltage power sourcepower distribution module is used for being connected with a starter of the hybrid electric vehicle through the isolating switch so as to supply power to the starter. The low-voltage power source isused for supplying power to the starter connected with the low-voltage power source in series. The power distribution control module is used for obtaining working condition information of the hybrid electric vehicle and controlling the isolating switch to be turned on and off on the basis of the working condition information. Through reasonable power distribution, it is guaranteed that the voltageof the whole vehicle is stable, the fault of a blank screen of an instrument or the stall of an engine due to the insufficient power or the start voltage drop is prevented, and the operation stability of the hybrid electric vehicle can be improved.

Description

technical field [0001] The invention relates to the technical field of hybrid vehicles, in particular to a power distribution system and method of a hybrid vehicle. Background technique [0002] With the increasingly stringent environmental protection measures around the world, hybrid vehicles have become one of the research and development priorities of various automobile factories due to their energy-saving and low-emission characteristics. Unlike transmission car models, hybrid vehicles usually have two sets of power supply equipment, namely high-voltage power supply and low-voltage power supply. Therefore, its power distribution system needs to distribute power reasonably according to the operating status of the vehicle and the power reserve of the power supply, and also be compatible with high-voltage power supply to charge low-voltage power supply to meet the different operating modes and battery life requirements of the power system. [0003] The power system start o...

AI Technical Summary

Problems solved by technology

In some special working conditions, such as traffic jams and insufficient peak power of the high-voltage power supply, the starter needs to be used frequently to start, resulting in a sharp drop in the power supply (SOC), resulting in the voltage of the starter starting circuit and the vehicle circuit being too low, which in turn leads to Part of the electrical equipment involved in the startup, such as electronic control unit (ECU), etc., cannot work normally, and problems such as black screen of the instrument, false fault report and failure to start normally occur.

Images