Patent ID: 11929524
Assignee: SPECTRONIK PTE. LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 15:
16. The closed-cathode hydrogen proton-exchange membrane (PEM) fuel cell stack according to claim 13, having one or more of the features selected from the following (a) to (j):
(a) the first ducting is shaped such that fluid approaching the inlets of the first set of fluid flow channels flows in a direction that is substantially parallel to the inlets of one or more of the first set of fluid flow channels with which the inner ducting volume is in fluid communication;
(b) the first ducting comprises at least two inlets;
(c) the first ducting is configured to increase or decrease the fluid flow rate through one or more of the fluid flow channels;
(d) the first ducting is shaped to restrict fluid flow through a portion of the first ducting;
(e) the first ducting comprises a recirculation portion configured to direct fluid flowing through a distal portion of the first ducting, relative to the at least one ducting inlet, towards one or more fluid flow channels located proximal to the at least one ducting inlet, relative to the distal portion of the first ducting;
(f) the first ducting comprises a first ducting portion configured to direct a first portion of fluid flowing through the first ducting to a first set of fuel cells, and a second ducting portion configured to direct a second portion fluid flowing through the first ducting to a second set of fuel cells;
(g) the first ducting comprises a humidification means located within the first ducting, where the humidification means is/are configured to humidify gas flowing through the first ducting;
(h) the first ducting comprises at least two inlets, and the closed-cathode hydrogen proton-exchange membrane (PEM) fuel cell stack comprises a humidification means proximal to the at least two inlets, where the humidification means is/are configured to humidify gas flowing through the first ducting;
(i) the first ducting comprises a mount for a blower or pump;
(j) the first ducting is formed from a thermally and/or electrically insulating material;
(k) the PEM fuel cell comprises a second ducting having at least one second ducting inlet and an inner ducting volume in fluid communication with the at least one second ducting inlet, where the inner ducting volume of the second ducting is in fluid communication with one or more fluid flow channels other than the fluid flow channels in fluid communication with the inner ducting volume of the first ducting.