Hydrogen management system of vehicle-mounted fuel cell

Abstract

The invention relates to a hydrogen management system of a vehicle-mounted fuel cell. The hydrogen management system comprises a hydrogen control unit (15), and a hydrogen bottle electromagnetic valve (4), a hydrogen bottle pressure sensor (2), a temperature sensor (5) and a hydrogen concentration sensor (16) which are connected with the hydrogen control unit (15) separately; the hydrogen bottle electromagnetic valve (4), the hydrogen bottle pressure sensor (2) and the temperature sensor (5) are connected with a vehicle-mounted high-pressure hydrogen bottle (1) separately; a probe of the hydrogen concentration sensor (16) is arranged in the environment above the high-pressure hydrogen bottle (1); and the hydrogen control unit (15) is in communication connection with a vehicle-mounted fuel cell controller through CAN. Compared with the prior art, the functions of hydrogen adding control, hydrogen supplying control, safety detection and the like of a vehicle-mounted hydrogen storage system can be realized, cable connection between systems is reduced, and signal missing in a signal transmission process and risk of high probability of interference are lowered.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a vehicle-mounted fuel cell hydrogen management system. Background technique [0002] A fuel cell is an electrochemical reaction device that directly converts chemical energy into electrical energy. According to different electrolytes, it can be divided into proton exchange membrane fuel cells, alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells and solid oxide fuel cells. Proton exchange membrane fuel cells have low operating temperature, high current density, fast response and stable performance. Moreover, the reaction product is only water, which is non-corrosive. Therefore, proton exchange membrane fuel cells have broad market prospects in the fields of vehicle transportation and backup power. [0003] At present, most of the fuel cell hydrogen systems for vehicles use 35MPa or 70MPa high-pressure hydrogen storage, and then supply the stack after two or m...

AI Technical Summary

Problems solved by technology

[0004] There is a certain distance between the integrated layout of the hydrogen system on the car or bus and the fuel cell controller, and the bottle valves, sensors, etc. need to supply power and send back signals to the controller. drive, which undoubtedly increases the number and complexity of electrical connections, leaves a large number of fault points, and increases the burden on the fuel cell controller

Images