Fuel cell system capable of reducing deterioration of fuel cell

摘要

A fuel cell system which is capable of reducing deterioration of fuel cells includes a cell stack, a CPU, a voltage detection circuit, a current detection circuit, an external air temperature sensor, a humidity sensor, a concentration sensor and sonars. The CPU obtains a volume of a garage, an amount of temperature change, an amount of humidity change and an amount of methanol concentration change in external air, as well as an amount of output change in the cell stack based on detection results from the voltage detection circuit, the current detection circuit, the external air temperature sensor, the humidity sensor, the concentration sensor and the sonars. The CPU sets first through fifth duration times based on the volume of the garage and the various amounts of changes, selects the shortest duration time, and stops power generation in the cell stack when the selected duration time has passed.

主权项

1. A fuel cell system comprising:
a fuel cell arranged to generate electric power using a fuel and air containing an oxidizer; a change information obtaining device programmed to obtain at least one amount of change information from an amount of temperature change information of the air used in power generation of the fuel cell, an amount of humidity change information of the air, and an amount of output change information of the fuel cell; and a control device programmed to stop the power generation in the fuel cell based on the amount of change information obtained by the change information obtaining device; wherein the air is air external to the fuel cell system or present inside the fuel cell system; the amount of output change information includes information regarding an amount of change in voltage of the fuel cell or an amount of change in current of the fuel cell; the control device is programmed to stop the power generation in the fuel cell if the amount of change is not smaller than a predetermined first threshold value; and the change information obtaining device obtains the at least one amount of change information by determining an amount of difference in temperature, humidity, or output between a latest detection result and a previous detection result.