Fuel cell system and control method of fuel cell system

摘要

Fuel cell system mounting fuel cell vehicle including: fuel cells having platinum-containing catalyst as electrode catalyst; cell voltage meter configured to measure cell voltage of fuel cells; and controller controlling fuel cell system, wherein (a) cell voltage meter obtains first cell voltage in predefined idling state of fuel cells, (b) in response to changing operation state of fuel cell vehicle from driving state to stop state, controller changes operation state of fuel cells to idling state, and cell voltage meter obtains second cell voltage of fuel cells in idling state, (c) controller uses difference between first and second cell voltages to obtain recovery process voltage for recovering catalyst of fuel cells and recovery process time duration wherein cell voltage of fuel cells is kept at recovery process voltage, and (d) controller reduces voltage of fuel cells to recovery process voltage for recovery process time duration, preforming recovery process of catalyst.

主权项

1. A control method of a fuel cell system to be mounted on a fuel cell vehicle and includes fuel cells having a platinum-containing catalyst as an electrode catalyst, the control method comprising the steps of:
(a) obtaining a first cell voltage of the fuel cells in a predefined idling state state; (b) in response to a change in operation state of the fuel cell vehicle from a driving state to a stop state, changing an operation state of the fuel cell vehicle to the idling state and obtaining a second cell voltage of the fuel cells in the idling state; (c) using a difference between the first cell voltage and the second cell voltage to obtain a recovery process voltage for recovering the catalyst of the fuel cells and a recovery process time duration in which the cell voltage of the fuel cells is to be kept at the recovery process voltage; and (d) reducing the voltage of the fuel cells to the recovery process voltage for the recovery process time duration, so as to perform a recovery process of the catalyst.