Patent ID: 8404397

Claim:
A fuel cell stack comprising: an electricity generating assembly having a plurality of unit cells that are disposed one after another; a pair of end plates pressedly disposed respectively at upper and lower ends of the electricity generating assembly; a joining device engaging the end plates by a rope, wherein the joining device applies pressure to the electricity generating assembly by means of tension of the rope, and controls the length and tension of the rope; a plurality of fastener assemblies disposed on one end plate along a length direction thereof, connected to one end of the rope at both ends of the one end plate, and supplying the tension to the rope; and a plurality of first hook units mounted on both sides of the other end plate along the length direction thereof corresponding to each fastener assembly to hook the other end of the rope, wherein each of the fastener assemblies includes: a pair of engagement blocks disposed on the one end plate and being slidable on the one end plate along a width direction thereof; a wedge member configured to be mounted at each engagement block, the rope being coiled to the wedge member and the wedge member pressing the rope to the engagement block; and at least one lead screw engaged to the pair of engagement blocks so as to control a distance therebetween, and supplying the tension to the rope.