Fuel cell metal separator and power generation cell
AssigneeHonda Motor Co., Ltd.
InventorsSatoshi Oyama, Yu Tomana
Life of this patent
Estimating the term…
Abstract
In a first metal separator, first bead structure for preventing leakage of a reactant gas protrudes in a separator thickness direction. The first bead structure includes bead seals in two lines (a passage bead and an outer bead) between a separator outer end and a portion of an oxygen-containing gas supply passage adjacent to the separator outer end. One of the bead seals in two lines has a wavy shape, and the other of the bead seals has a straight shape, as viewed in the separator thickness direction.
Claims9
A fuel cell metal separator including a reactant gas flow field for allowing a reactant gas to flow along an electrode surface, a reactant gas passage connected to the reactant gas flow field, and bead structure configured to prevent leakage of the reactant gas, the reactant gas passage extending through the fuel cell metal separator in a separator thickness direction, the bead structure protruding in the separator thickness direction,
- wherein the bead structure comprises bead seals in two lines between a separator outer end forming one side of the fuel cell metal separator and a portion of the reactant gas passage adjacent to the separator outer end;
- and
- one of the bead seals in two lines has a wavy shape, and another of the bead seals in two lines has a straight shape, as viewed in the separator thickness direction.
A power generation cell comprising:
- a membrane electrode assembly;
- and
- fuel cell metal separators provided on both sides of the membrane electrode assembly;
- the fuel cell metal separator including a reactant gas flow field for allowing a reactant gas to flow along an electrode surface, a reactant gas passage connected to the reactant gas flow field, and bead structure configured to prevent leakage of the reactant gas, the reactant gas passage extending through the fuel cell metal separator in a separator thickness direction, the bead structure protruding in the separator thickness direction,
- wherein the bead structure comprises bead seals in two lines between a separator outer end forming one side of the fuel cell metal separator and a portion of the reactant gas passage adjacent to the separator outer end;
- and
- one of the bead seals in two lines has a wavy shape, and another of the bead seals in two lines has a straight shape, as viewed in the separator thickness direction.
Dependencies are inferred from the claim text.