Patent ID: 8241802
Filing Date: 2012-08-14
Classification: H01M,Y02E

Abstract:
1. A fuel cell system including: a fuel cell; an electric accumulator interposed in a discharge path of the fuel cell and connected in parallel to the fuel cell; a voltage converting device connected between the electric accumulator and the fuel cell; and a control unit, wherein the control unit comprises: a voltage instruction signal generating section programmed to superimpose an impedance measuring signal on an output target voltage of the voltage converting device and output the voltage to the voltage converting device, when an impedance of the fuel cell is measured by using an AC impedance method; and a state detecting section programmed to judge a state of a response characteristic of the voltage converting device; wherein the voltage instruction signal generating section is programmed to superimpose the impedance measuring signal on the output target voltage of the voltage converting device and output the voltage to the voltage converting device in a case where the state detecting section judges that the response characteristic of the voltage converting device is in a stable state.