Patent ID: 8465881
Filing Date: 2013-06-18
Classification: H01M,Y02E

Abstract:
1. A fuel cell stack assembly comprising: a first end plate; a second end plate; a plurality of fuel cells interposed between the first and the second end plates in a first direction; a spring bar; a disc spring having, in a plane perpendicular to the first direction, an inner and an outer diameter, interposed between the first end plate and the spring bar, wherein the spring bar contacts and loads the disc spring at the inner diameter of the disc spring; and a compression band circumscribing the first endplate, the second end plate, the plurality of fuel cells and the spring bar; wherein the compression band biases the spring bar toward the first end plate and second end plate, thereby applying compressive force upon the plurality of fuel cells, and wherein a width of the spring bar in the plane perpendicular to the first direction is less than the outer diameter of the disc spring so that the width of the spring bar does not completely overlap with the outer diameter of the disc spring.