Patent ID: 8968953
Filing Date: 2015-03-03
Classification: H01M,Y02E

Abstract:
1. A solid oxide fuel cell system comprising: a fuel cell module comprising multiple fuel cell units; a fuel supply device that supplies fuel to the fuel cell module; an oxidation gas supply device that supplies oxidation gas to the fuel cell module; and a controller programed to control a fuel supply from the fuel supply device in response to a demand for electricity to control operation of the fuel cell module; wherein the controller comprises wherein the degradation determining circuit programed to perform, if it determines in the last execution of degradation determination that the fuel cell module has degraded, a reference measurement value update in which the degradation determining circuit obtains a new measurement value while the fuel cell module is operated under the operation condition changed by the degradation response circuit, and store the new measurement value as the reference measurement value for a next execution of degradation determination, and the degradation determining circuit is further programed to dispense with performing the reference measurement value update and leave the stored reference measurement value unchanged for the next execution of degradation determination if it determines in the last execution of the degradation determination that the fuel cell module has not degraded.