Fuel cell system and control method for fuel cell system

摘要

In a fuel cell system that includes a fuel cell that generates power in response to an electrochemical reaction between hydrogen and oxygen contained in air, and a compressor that supplies air to the fuel cell, in which an idle stop is executed to stop power generation by the fuel cell when a required load falls to or below a predetermined value, and during the idle stop, air is supplied in accordance with a voltage condition between a cathode and a anode of the fuel cell, regardless of the required load, air is supplied during the idle stop while detecting an air supply amount, and when the air supply amount reaches a predetermined value, the air supply is stopped.

主权项

1. A fuel cell system comprising:
a fuel cell that generates power by an electrochemical reaction between hydrogen and oxygen contained in air; a compressor that supplies air to the fuel cell; and a controller that is programmed to
execute an idle stop that is to stop power generation by the fuel cell when a required load falls to or below a predetermined value, andsupply, during the idle stop, air in accordance with a voltage condition between a cathode and an anode of the fuel cell, regardless of the required load, wherein the controller is further programmed to detect a cell voltage or a cell group voltage, calculate the voltage condition on the basis of a result of the detection, determine as a calculation result determination, on the basis of a result of the calculation, whether a previous value of an air supply amount supplied intermittently to a cathode during the idle stop is excessive or insufficient, decide to reduce or increase the air supply amount relative to a preset fixed value or a previous supply amount in accordance with a result of the calculation result determination, and stop the air supply performed during the idle stop when the air supply amount reaches a predetermined value.