Patent ID: 7179556
Filing Date: 2007-02-20
Classification: H01M,Y02E

Abstract:
1. A fuel cell system comprising a fuel cell stack including a plurality of stacked individual fuel cells, for generating electric power by an electrochemical reaction of hydrogen and oxygen, a thermal medium circulation path through which a thermal medium is circulated into a first part and a second part of each individual fuel cell; a bypass path through which the thermal medium is circulated into the first part of each individual fuel cell while bypassing the second part of each individual fuel cell; a first thermal medium circulation device which controls an amount of the thermal medium circulated in the thermal medium circulation path; a heating device for heating the thermal medium; and a second thermal medium circulation device provided in the bypass path, for controlling an amount of the thermal medium circulated in the bypass path; wherein the first part of each individual fuel cell is collectively heated using the bypass path when the fuel cell is warmed up in a warm-up operation.