Power supply system of hybrid electric vehicle

Abstract

The invention provides a power supply system of a hybrid electric vehicle, and the power supply system is connected with a motor drive system for driving the vehicle to run, and the power supply system comprises a fuel battery, a hydrogen supply system, a fuel battery accessory, an auxiliary power source and a power supply converter; the power supply system also comprises a control element, a contactor and a diode, wherein the control element is connected with the power supply converter and connected with the fuel battery and the motor drive system when the power supply converter does not work; the contactor is provided with a first connecting end and a second connecting end and arranged between the fuel battery and the power supply converter, the first connecting end is connected with the fuel battery, and the second connecting end is connected with the power supply converter; and the diode is used for controlling the fuel battery to supply power to the fuel battery accessory, an anode of the diode is connected with the power supply converter, and a cathode of the diode is connected with the fuel battery accessory. Due to the adoption of the power supply system, the problems of the existing power supply system that the cost of the power supply converter is high, the size is large and the running efficiency of the fuel battery system is low can be solved.

Description

technical field

[0001] The invention relates to the technical field of fuel cell vehicles, in particular to a power supply system of a hybrid vehicle. Background technique

[0002] A hybrid vehicle refers to a vehicle that has at least two power sources and uses one or more of them to provide part or all of the power. However, in real life at present, most hybrid vehicles use traditional internal combustion engines and electric motors as power sources, and drive the vehicles through the mixed use of two systems of heat and electricity. The internal combustion engines used are both diesel and gasoline, so traditional gasoline or diesel can be used, and some engines have been modified to use other alternative fuels, such as compressed natural gas, propane and ethanol fuel.

[0003] There are many kinds of vehicle power sources: batteries, supercapacitors, fuel cells, solar cells, generator sets for diesel locomotives. Currently, hybrid vehicles generally refer to cars with ge...

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