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The coolant plate component (16) of a fuel cell assembly is formed from a plate (20) made from graphite particles that are bonded together by a fluorocarbon polymer binder and which encapsulate a serpentine coolant circulation tube (18). The coolant plate component is non-porous. The graphite partic...

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Main Authors MARTIN, RONALD G, ROCHE, ROBERT P, BREAULT, RICHARD D, O'BRIEN, JOSEPH J, SCHEFFLER, GLENN W, RAJPOLT, MICHAEL J., JR
Format Patent
LanguageGerman
Published 15.02.2000
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
BLASTING
DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION
ELECTRICITY
HEAT EXCHANGE IN GENERAL
HEATING
LIGHTING
MECHANICAL ENGINEERING
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
WEAPONS
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Summary:The coolant plate component (16) of a fuel cell assembly is formed from a plate (20) made from graphite particles that are bonded together by a fluorocarbon polymer binder and which encapsulate a serpentine coolant circulation tube (18). The coolant plate component is non-porous. The graphite particles are preferably flakes which pack together very tightly, and require only a minor amount of the polymer binder to form a solid plate. The plate will provide enhanced heat transfer, will conduct electrons, and will block electrolyte migration from cell to cell in a fuel cell stack (2) due to its construction. The composition of the plate is graded so as to provide a varied coefficient of thermal expansion as measured through the thickness of the plate so as to reduce thermal stresses imposed on the fuel cell stack. The coolant circulation tube (18) has a roughened outer surface (22) which enhances adhesion of the encapsulating graphite flake/binder mixture without inhibiting heat transfer.
Bibliography:Application Number: AT19950201280T