PLANAR AND ESSENTIALLY RECTANGULAR FUEL CELL AND FUEL CELL BLOCK

摘要

The invention relates to a planar, rectangular and water-cooled fuel cell (21) comprising a cooling element (1, 23) with a cooling chamber (3) through which cooling water flows during the operation of the fuel cell (21). Cooling water does not flow through said cooling chamber (3) in a homogeneous manner, normally resulting in local heating of said fuel cell (21) in regions through which the cooling water flows through less frequently. The aim of the invention is to solve said problem by producing a fuel cell (21) which is provided with a cooling element (1, 23) which comprises an essentially rectangular cooling chamber (3) with four corner regions, whereby the opening of a coolant flow (7a, 29a) is arranged in the first corner (5a), the opening of a first coolant flow (7b, 29b) is arranged in a second corner (5b) and a second coolant flow (7c, 29c) is disposed in a third corner (5c). The first coolant flow (7b, 29b) has a cross section Q1 on the narrowest point thereof and the second coolant flow (7c, 29c) has a cross section Q2 on the narrowest point thereof, the ratio of Q1/Q2 being 7 - 25.