Apparatus and method for compressing a stack of electrochemical

Details Apparatus and method for compressing a stack of electrochemical Apparatus and method for compressing a stack of electrochemical

1997-11-19

2000-03-21

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 37, H01M 824

Patent

active

060400722

ABSTRACT:
The present invention provides an apparatus and method for assembling an electrochemical cell stack, or an assemblage of components which need to be clamped together, especially where minimizing the size and weight of the clamping mechanism is advantageous. The invention encompasses combining a band or strap to transmit load to a plurality of components. A metal link is provided to apply greater tension to the band than could normally be achieved with the band alone. The invention may provide a band having a spiral screw clamp wherein the screw portion is used to apply and control tension in the band and the band is used to transmit the tension to a plurality of components. The invention also provides systems that improve the distribution of the force over a portion of the assembly, preferably the entire area of at least one face of the assembly. The invention encompasses a system with straps surrounding a fuel cell stack placed between two end plates, with raised ridges placed under the strapping system to concentrate the compressive force at selected points on the endplates. The invention also encompasses a device comprising an array of adjustable elements that control the distribution of the compressive load.

REFERENCES:
patent: 4020244 (1977-04-01), Selinko
patent: 4345009 (1982-08-01), Fahle et al.
patent: 4800008 (1989-01-01), Detournay et al.
patent: 5037711 (1991-08-01), Bonnaud et al.
patent: 5484666 (1996-01-01), Ibb et al.
patent: 5789091 (1998-08-01), Wozniczka et al.

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