Control method of high reliability fuel cell car power system

Abstract

The invention relates to a control method of a high reliability fuel cell car power system. The method includes: a direct current / direct current (DC / DC) converter is arranged between a fuel cell and a motor controller, and the DC / DC converter is connected with a vehicle controller through a controller area network (CAN) line. The method specifically includes: an energy management control sub-method, a cold start control sub-method, a fault diagnosis and fault-tolerant processing sub-method and a hydrogen and electrical safety control sub-method. Compared with the prior art, through coordination control of the fuel cell car power system, the control method of the high reliability fuel cell car power system achieves energy balance of a fuel cell and a storage battery while meeting vehicle energy demands, reduces energy consumption, prolongs service life of the power system, and simultaneously has functions of cold start coordination, fault diagnosis, fault-tolerance processing, hydrogen, high tension electricity safety protection control and the like.

Description

technical field [0001] The invention relates to the field of fuel cell vehicles, in particular to a control method for a high-reliability fuel cell vehicle power system. Background technique [0002] Fuel cell car is a new energy vehicle, because of its advantages of energy saving, environmental protection and low noise, it has become a hot spot in the research and development of automobiles in recent years. The development of power system is the key technology for the development of fuel cell cars. [0003] The power system of electric-electric hybrid fuel cell vehicles has significant characteristics different from other types of vehicle power systems. Due to the soft output characteristics of the fuel cell itself, under normal circumstances, the power source of the fuel cell car is the main power source fuel cell system It is composed of the auxiliary power source battery, and how the two power sources work together is determined by the energy management strategy of the ...

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Problems solved by technology

[0004] In recent years, the cold start of fuel cells has become a research hotspot. Due to the working principle of the fuel cell, there is a large amount of water in the fuel cell stack. Shutting down in a cold environment will cause the water in the fuel cell to freeze, which will cause the fuel cell to fail. damaged or scrapped

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