Auxiliary energy supply system of fuel cell car

Abstract

The invention relates to an auxiliary energy supply system of a fuel cell car. The auxiliary energy supply system comprises original components of the car, and further comprises an additionally arranged pneumatic power generator and an additionally arranged rectifier, wherein the additionally arranged pneumatic power generator and a pressure reducing valve are sequentially arranged on a gas path between a high-pressure hydrogen cylinder group and a fuel cell, the additionally arranged rectifier is arranged between the additionally arranged pneumatic power generator and a lithium battery, the additionally arranged pneumatic power generator is driven through pressure relief energy of high-pressure hydrogen in the high-pressure hydrogen cylinder group so as to generate electric energy, meanwhile, hydrogen gas passing through the additionally arranged pneumatic power generator enters the fuel cell through the pressure reducing valve, the additionally arranged rectifier receives the electric energy of the additionally arranged pneumatic power generator to carry out rectification, and then assists in lithium battery charging, and the lithium battery supplements electric energy for a vehicle-mounted auxiliary battery through a DC/DC converter. The system effectively solves the problems that in the prior art, a fuel cell car is large in energy waste, and low in energy utilization rateof the whole vehicle, the energy of a lithium battery is insufficient under the partial working conditions, and energy supplement is lacked, and the overall energy utilization rate is improved.

Description

technical field [0001] The invention relates to the technical field of energy recovery and utilization, in particular to an auxiliary energy supply system for a fuel cell vehicle. Background technique [0002] As the global greenhouse effect becomes more and more serious, as the consumption of fossil fuels increases day by day, and as environmental issues are paid more and more attention, the country begins to vigorously develop clean energy and new energy vehicles. New energy vehicles use electric energy instead of fossil fuels such as petroleum as power, get rid of dependence on petroleum and reduce environmental pollution at the same time, which is an efficient solution for green transportation. Compared with traditional fuel-consuming vehicles, vehicles powered by hydrogen fuel cells have advantages such as high energy conversion efficiency of fuel cells, environmental protection, no vibration, low noise, long life, more raw materials for hydrogen production, and fast en...

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Problems solved by technology

[0006] The present invention aims at problems such as large energy waste caused by the ineffective use of energy in the hydrogen depressurization process of the fuel cell vehicle in the prior art, low energy utilization rate of the whole vehicle, insufficient energy of the lithium battery itself and lack of energy supplement under some working conditions, etc., and provides An auxiliary energy supply system for fuel cell vehicles, which makes full use o

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