Patent ID: 9711988
Date: 2017-07-18
CPC Classifications: H01M,H02J,Y02E

Claim:
1. A fuel cell system which is connected to a storage battery and supplies power to a load, the fuel cell system comprising: a power generation unit configured to generate power; an obtaining unit configured to obtain battery information indicating a storage state of the storage battery; and a control unit configured to select one of a first control mode and a second control mode based on the battery information when load power that is demand power of the load changes from a first load power to a second load power, the first control mode being for supplying power from the power generation unit to the load by causing the power generation unit to generate power without causing the storage battery to charge and discharge, the second control mode being a mode in which the control unit (i) determines a change rate of generation power having a value smaller than a value of a change rate of generation power in the first control mode, by causing the storage battery to supply power to the load or causing the storage battery to charge or discharge in such a manner that the storage battery is charged with at least part of power supplied from the power generation unit, and (ii) causes the power generation unit to generate power with the determined change rate of generation power in the second control mode, the change rate of generation power in the second control mode being a temporal change in the generation power of the power generation unit.