Output control system for fuel battery emergency electric power source startup and control method

Abstract

The invention discloses an output control system for fuel battery emergency electric power source startup, and a control method thereof. The system comprises a fuel battery stack of an emergency electric power source, an output DC (direct current) / DC of the emergency electric power source, an output load of the emergency electric power source, a current-limiting circuit of the emergency electric power source, a controller of the emergency electric power source, a current sensor, a temperature sensor and a voltage sensor. According to the invention, when the fuel battery stack voltage is lower than a set ultimate value, the current-limiting circuit of the emergency electric power source limits the increase of the load to effectively protect the fuel battery stack, so that the service life of the fuel battery stack can be prolonged, and the startup time of the emergency electric power source can be adjusted according to the operating temperature of the fuel battery stack to meet the startup requirements of different loads without influencing the service life of fuel battery stack; and according to the invention, due to no high-capacity storage battery is required to be used, the material cost and the maintenance cost can be reduced. According to the invention, the shortening of the service life of the fuel battery caused by excessively fast loading of the normal startup of the emergency electric power source can be decreased.

Description

technical field [0001] The invention relates to the field of a fuel cell backup power supply, in particular to a control system and a control method for starting and outputting the fuel cell backup power supply. Background technique [0002] A fuel cell is an energy conversion device that converts chemical energy stored in fuel and oxidant directly into electrical energy isothermally according to electrochemical principles. Proton exchange membrane fuel cell (proton exchange membrane fuel cell, PEMFC) uses perfluorosulfonic acid solid polymer as electrolyte, platinum / carbon or platinum-ruthenium / carbon as electrocatalyst, hydrogen or purified reformed gas as oxidant, with The graphite or surface-modified metal plates of the flow channels are bipolar plates. The reaction principle is that the hydrogen in the anode catalytic layer undergoes an electrode reaction under the action of the catalyst, and the electrons generated by the electrode reaction reach the cathode through t...

AI Technical Summary

Problems solved by technology

The advantage of this solution is that the fuel cell stack can be slowly loaded during the startup process, but the disadvantage is that it cannot be loaded and started according to the actual situation of the fuel cell stack, which affects the service life of the fuel cell stack

Images