| 摘要 |
PURPOSE:To even temperature and current density within the cell surface of each unit cell for forming a fuel cell. CONSTITUTION:Grooves 50, 60 are provided in a separator 1 of a unit cell to form a fuel gas flow passage 5 and an oxidant gas flow passage 6. Flow quantity control valves 59, 69, of which open degree is changed in response to the temperature, are provided in each groove 50, 60. When the temperature abnormally rises, the flow quantity control valve 59 arranged in the fuel gas flow passage 5 is closed to reduce the flow quantity of the fuel gas flowing in the groove 50. When the temperature abnormally rises, the flow quantity control valve 69 arranged in the oxidant gas flow passage 6 is opened to increase the quantity of the oxidant gas. Temperature control is performed from both views of the cooling ability and the quantity of heat generation so as to eliminate the temperature distribution within the cell surface, and the cell performance is stabilized and the lifetime thereof is prolonged. |
