Patent ID: 9252436
Filing Date: 2016-02-02
CPC Classification: H01M,Y02E

Claim Text:
1. A method of operating a fuel cell system, comprising steps of: (a) circulating water in a water circulating path in the fuel cell system by a water circulator to suppress freezing in the water circulating path; (b) heating a recovered water tank for storing water which has been recovered from an exhaust gas discharged from a fuel cell and has not been purified in a purifier, to suppress freezing in the recovered water tank; (c) detecting a first abnormality which is an abnormality relating to leakage of water from the water circulating path; and (d) inhibiting the step (a) and not inhibiting the step (b), in a case where the fuel cell system is shut down in response to detection of the first abnormality, wherein: the water circulating path includes a recovered water circulating path comprising the recovered water tank and a recovered water path through which the water circulates between the recovered water tank and a cooling water tank, the step (a) comprises steps of: the step (c) comprises steps of: the step (d) comprises steps of: the second water circulating path includes the recovered water circulating path, and the first water circulating path includes one of: