Power distribution method of fuel cell hybrid electric vehicle

Abstract

The invention provides a power distribution method of a fuel cell hybrid electric vehicle. The power distribution method comprises the steps of distribution of output power of main energy sources andauxiliary energy sources of the vehicle, and distribution of output power among the auxiliary energy sources. The distribution strategy of the output power of the main energy sources and the auxiliaryenergy sources of the vehicle is that load power of the vehicle is distributed to a fuel cell and the auxiliary energy sources, and the power distribution strategy of the auxiliary energy sources isthat the required power of the auxiliary energy sources is distributed to a cell and a super capacitor. Under the condition of a charge-discharge hysteresis loop, modes are divided into the dischargemode, the balance mode and the charge mode. Then under the different cell modes, the distribution method based on rules is set by combining the working efficiency of the fuel cell. According to the demand distribution step of the auxiliary energy sources, the required power of the auxiliary energy sources serves as the sampling value, and the required power of the auxiliary energy sources minus the cell output power is the output power of the super capacitor. The load power is reasonably distributed to the fuel cell, the cell and the super capacitor, and meanwhile the purpose of decreasing ofthe hydrogen consumption quantity is achieved.

Description

technical field [0001] The invention belongs to the field of fuel cell hybrid electric vehicles, in particular to a power distribution method for fuel cell hybrid electric vehicles. Background technique [0002] Due to the frequent occurrence of environmental problems such as the oil crisis and environmental pollution, the government has become more and more stringent on the emission indicators of fuel vehicles. Countries have gradually announced the date of stopping the production of traditional fuel vehicles, and major automakers have to develop new energy vehicles. Fuel cell hybrid vehicles have neither long charging time nor emission of polluting gases. They are a new generation of new energy vehicles. Due to the high price of fuel cells and their own characteristics, they are usually mixed with batteries or (and) supercapacitors to form a composite power supply, using their respective advantages to make up for their shortcomings. [0003] At present, the control strate...

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Problems solved by technology

The existing control strategy for the three energy sources does not reasonably distribute the power

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