Energy management system for fuel cell hybrid power motor vehicle

Abstract

The invention discloses an energy management system for a fuel cell hybrid power motor vehicle. The system comprises a one-way DC/DC converter based on a DC/DC conversion module and cascaded with a fuel cell power generation system, a two-way DC/DC converter based on a DC/DC conversion module and cascaded with an accumulator, a two-way DC/DC converter based on a DC/DC conversion module and cascaded with a super-capacitor set, a brake resistor unit, an energy management unit, a voltage acquisition circuit, a current acquisition circuit and load interfaces. According to the requirements of a traction motor, the output characteristic of a fuel cell, and the electrical characteristics of an accumulator set and the super-capacitor set, braking energy is recovered. By the adoption of the energy management system based on the DC/DC conversion modules for the fuel cell hybrid power motor vehicle, the fuel cell works in a high-hydrogen-effect mode, the stage of charge of the accumulator is kept within a certain range, and the service life of the accumulator can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of hybrid locomotive energy management, and in particular relates to an energy management system for a fuel cell hybrid locomotive. Background technique [0002] The lack of energy in the world is becoming more and more serious. As an effective solution, new energy has gradually become a research hotspot in various countries in the world. The development of renewable energy such as wind energy, solar energy, and hydrogen energy has become an inevitable trend in global energy development. Among them, fuel cells powered by hydrogen energy have outstanding advantages such as high efficiency, safety, environmental protection, and high power density, and have been widely studied by various countries. However, The fuel cell has low instantaneous response capability and slow dynamic response, so the hybrid power system combining fuel cell and auxiliary energy has received extensive attention from various countries....

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Problems solved by technology

[0004] At present, research on the energy management methods of fuel cell hybrid locomotives has been carried out at home and abroad, and many energy management implementation methods have also been proposed. Some scholars have proposed a fuzzy control energy management strategy based on particle swarm optimization. The hybrid locomotive composed of the hybrid locomotive can meet the dynamic performance of the locomotive through the fuzzy control energy management strategy based on the particle swarm algorithm, and also reduce the fuel consumption. However, when the locomotive generates braking energy, the charging power of the battery is required. And The charging a...

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