Power generating cell
AssigneeHonda Motor Co., Ltd.
InventorsKentaro Ishida, Yu Tomana, Akihito Giga
Life of this patent
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Abstract
A power generating cell is equipped with an MEA to which a resin frame is attached, and a first metal separator. In the first metal separator, there are provided an oxygen-containing gas flow field through which an oxygen-containing gas flows along an electrode surface, an outer peripheral bead surrounding the oxygen-containing gas flow field and which prevents leakage of a reaction gas, and a plurality of first bypass stopping convex portions that prevent bypassing of the reaction gas. Intermediate convex portions that support the resin film are provided between mutually adjacent ones of the first bypass stopping convex portions.
Claims15
A power generating cell comprising a resin film equipped membrane electrode assembly, and metal separators disposed on both sides of the resin film equipped membrane electrode assembly, the resin film equipped membrane electrode assembly including a membrane electrode assembly formed with electrodes provided on both sides of an electrolyte membrane, and a resin film having a frame shape which is provided over an entire outer peripheral portion of the membrane electrode assembly, and reaction gas flow fields that allow reaction gases to flow along power generating surfaces being formed from one end to another end of the metal separators, and bead seals being provided that surround the reaction gas flow fields and configured to prevent leakage of the reaction gases, wherein the reaction gas flow fields include a plurality of flow field forming protrusions extending from the one end to the other end of the metal separators, and a plurality of flow field grooves formed between the plurality of flow field forming protrusions, and wherein a plurality of bypass stopping convex portions configured to prevent bypassing of the reaction gases are provided at intervals in a direction of extension of the flow field forming protrusions, between portions of the bead seals that extend from the one end to the other end of the metal separators, and the flow field forming protrusions that are positioned at ends in a flow field widthwise direction of the reaction gas flow fields;
- wherein intermediate convex portions configured to support the resin film are provided in at least one of a pair of the metal separators, between mutually adjacent ones of the bypass stopping convex portions.
Dependencies are inferred from the claim text.