Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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8/00
Fuel cells; Manufacture thereof
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H01M8/04
Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
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H01M8/04082
Arrangements for control of reactant parameters, e.g. pressure or concentration
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H01M8/04119
with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
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H01M8/04149
by diffusion, e.g. making use of membranes
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