H
ELECTRICITY
H
ELECTRICITY
H01
ELECTRIC ELEMENTS
H01
ELECTRIC ELEMENTS
H01M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
H01M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
H01M8/00
Fuel cells; Manufacture thereof
H01M8/00
Fuel cells; Manufacture thereof
H01M8/04
Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
H01M8/04
Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
H01M8/04298
Processes for controlling fuel cells or fuel cell systems
H01M8/04298
Processes for controlling fuel cells or fuel cell systems
H01M8/04694
characterised by variables to be controlled
H01M8/04694
characterised by variables to be controlled
H01M8/04791
Concentration; Density
H01M8/04791
Concentration; Density