Fuel cell

摘要

The present invention relates to a fuel cell having separate plates acting as bipolar plates which are sandwiched between the two adjacent cell elements. A cell stack of a fuel cell is formed therein with tunnel-shaped cooling gas passages extending between and open at two opposite sides thereof. Reactive gas supply passages for fuel gases and air are isolated from the cooling gas passages and extend between and open at the two opposite sides thereof which are different from those of the cooling gas passages. Therefore, the separate plates have their reactive gas supply passages supplied through manifolds, which are arranged at the sides of the fuel cell in a manner to face the entrance and exit ports of the reactive gas supply passages. The reactive gases are supplied at rates sufficient to be consumed by the galvanic reaction. The cooling gas passages are supplied through manifolds, which are arranged at the other sides of the fuel cell, i.e. different from the sides of the reactive gas supply passages. The cooling gases take no part in the galvanic reaction at a proper flow rate, whereby the respective cell elements constructing the cell stack of the fuel cell is cooled uniformly without establishing a temperature difference between the cell elements.