COUPLING STRUCTURE OF SSURFACE PRESSURE DEVICE FOR FUEL CELL

摘要

The present invention relates to a coupling structure of an apparatus for applying surface pressure for a fuel cell, the invention comprising: a stack having a plurality of unit cells; surface pressure plates each provided at both ends along a stacking direction of the stack; and an apparatus for applying surface pressure for applying pressure such that the surface pressure plates come close to each other wherein the apparatus for applying surface pressure comprises: a surface pressure rod being coupled by passing through the surface pressure plate; a first surface pressure spring coupled to a circumference of the surface pressure rod; a second surface pressure spring having an expanded diameter compared with the first surface pressure spring and disposed outside the first surface pressure spring; and a spring support for supporting the first surface pressure spring and the second surface pressure spring to be overlapped along a stretching direction. Accordingly, it is possible to improve a surface pressure holding ability of the fuel cell and possible to reduce an overall size of a product by reducing an overall length of the surface pressure spring for the same change in length.