1. A dual cell assembly (100) of fuel cell stack (200), the dual cell assembly (100) comprising:
a first cell (100A) comprises:
a first bipolar plate (102) having a first flow field side (102a);
a second bipolar plate (104) having a second flow field side (104a); and
a first membrane electrode assembly (MEA) (103) interposed between
the first and the second flow field sides (102a, 104a);
a second cell (100B), coupled to the first cell (100A), wherein the second cell
(100B) comprises:
a third bipolar plate (106) having a third flow field side (106a);
a fourth bipolar plate (108) having a fourth flow field side (108a); and
a second membrane electrode assembly (MEA) (107) interposed between the third and the fourth flow field sides (106a, 108a);
wherein, each of the first, second, third and fourth flow field sides (102a,
104a, 106a, 108a) is defined with:
at least one inlet port (10a, 10b) to receive a reactant gas;
a flow field zone (20), fluidly connected to the at least one of the inlet
port (10a,10b), for a flow of the reactant gas, wherein the flow field zone (20)
is defined with a plurality of pathways (22) formed by an array of scales (30)
disposed in a spaced apart configuration, wherein each scale of the array of
scales (30) is formed by an elliptical projection (32) encompassed between a
pair of guide vanes (34) converging towards each other; and
at least one of the outlet port (40a,40b), fluidly connected to the flow
field zone (20), for dispensing the reactant gas.
2. The dual cell assembly (100) as claimed in claim 1, wherein the first bipolar plate (102)
comprises a first cooling side (102b), opposite to the first flow field side (102a),
wherein the first cooling side (102b) is defined with a plurality cooling channels (102c)
for a coolant flow.
22
3. The dual cell assembly (100) as claimed in claim 2, wherein the plurality of cooling
channels (102c) of the first cooling side (102b) is fluidly connected to at least one inlet
port (10c) and at least one outlet port (40c) of the first bipolar plate (102).
4. The dual cell assembly (100) as claimed in claim 1, wherein the second bipolar plate
(104) is having a second cooling side (104b), opposite to the second flow field side
(104a), wherein the second cooling side (104b) is defined with a plurality cooling channels (104c) for a coolant flow.
5. The dual cell assembly (100) as claimed in claim 4, wherein the plurality of cooling
channels (104c) of the second cooling side (104b) is fluidly connected to at least one
inlet port (10c) and at least one outlet port (40c) of the second bipolar plate (104).
6. The dual cell assembly (100) as claimed in claim 1, wherein the third bipolar plate (106)
and the fourth bipolar plate (108) comprises a flushed side (106b, 108b) opposite to the
third flow field side (106a) and the fourth flow field side (108a), respectively.
7. The dual cell assembly (100) as claimed in claim 1, wherein each of guide vane of the
pair of guide vanes (34) comprises a leading edge (34b), a trailing edge (34a), and an
upper surface (34c) formed by an inclined portion at the trailing edge (34a) and a flat
portion at the leading edge (34b).
8. The dual cell assembly (100) as claimed in claim 1, wherein the array of scales (30) is
disposed at a predetermined inclination with respect to a horizontal axis (X-X’) of the
dual cell assembly (100).
9. The dual cell assembly (100) as claimed in claim 1, comprises a fluid path (50) provided
at an outer perimeter of the flow field zone (20) and the plurality of cooling channels
(102c,104c) for collection of fluid released by the fuel cell stack (200) and passage of
the fluid towards the at least one of the outlet port (40a,40b,40c).
10. The dual cell assembly (100) as claimed in claim 1, comprises a seal (60) disposed
around the at least one of the inlet port (10a,10b,10c), the flow field zone (20), cooling
channels (102c,104c) and at least one of the outlet port (40a,40b,40c).