Control method for fuel cell system

The invention relates to a control method for a fuel cell system. The control method for the fuel cell system includes: acquiring a poisoning rate of an electrode catalyst of a fuel cell; when the poisoning rate of the electrode catalyst is greater than a prescribed value alpha, performing a potential maintaining operation that maintains the potential of the fuel cell in a first potential range; and after the potential maintaining operation has been performed, performing a potential changing operation that repeats a cycle in which the potential of the fuel cell is changed between an upper limit potential and a lower limit potential of a second potential range that is higher than the first potential range. 本发明涉及用于燃料电池系统的控制方法。用于燃料电池系统的控制方法包括：获取燃料电池的电极催化剂的中毒率；当电极催化剂的中毒率大于规定值α时，执行电位维持操作，该电位维持操作将燃料电池的电位维持在第一电位范围中；以及在已经执行电位维持操作之后，执行电位改变操作，该电位改变操作重复以下循环，在该循环中，燃料电池的电位在第二电位范围的上限电位和下限电位之间改变，其中该第二电位范围高于第一电位范围。