Flow field plate for fuel cells, fuel cell stack with flow field plates of this type, and vehicle with a fuel cell stack of this type
A fuel cell stack and fuel cell technology, which is applied to fuel cell components, fuel cells, power system fuel cells, etc., can solve the problems of reducing the flexibility of bipolar plates
Pending Publication Date: 2021-11-05
AUDI AG
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Problems solved by technology
This gives rise to other boundary conditions which reduce the flexibility of the design of the bipolar plate
Method used
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[0044] figure 1 A fuel cell stack according to the invention, generally designated 100 , is shown schematically. The fuel cell stack 100 may be part of a vehicle, not further shown, in particular an electric vehicle, which has a traction motor which is supplied with electrical energy via the fuel cell stack 100 .
[0045] The fuel cell stack 100 comprises a plurality of alternately arranged (stacked) membrane electrode assemblies 10 and bipolar plates 12 aligned together on their flat sides. That is, as a whole, a plurality of stacked single cells 11 constitutes a fuel cell stack 100 , wherein not only any of these single cells 11 but also the fuel cell stack 100 can generally be called a fuel cell. The fuel cell stack 100 has end plates 18 on both end sides. Arranged between the bipolar plates 12 and the respective membrane electrode arrangement 10 are anode and cathode regions, not shown, which are delimited by a circumferential seal 20 . In particular, in order to establ...
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Abstract
The invention relates to a flow field plate for a fuel cell, which has an anode plate (30) with an anode side (31) and a coolant side (32), a first structure (33) being formed on the anode side (31) to form an anode flow field (34), and a cathode plate (40) with a cathode side (41) and a coolant side (42), a second structure (43) being formed on the cathode side (41) to form a cathode flow field (44), wherein structure elements (51) are arranged between the anode plate (30) and the cathode plate (40) to form a coolant flow field (50), said structure elements being in contact with the coolant sides (32, 42) of the anode plate (30) and the cathode plate (40). Said flow field plate has an optimised pressure distribution in a fuel cell stack (100) and greater stability than the prior art because, according to the invention, the structural elements consist of an elastic material. The invention further relates to a fuel cell stack and a vehicle.
Description
technical field [0001] The invention relates to a bipolar plate for a fuel cell, comprising: an anode plate having an anode side and a coolant side, wherein a first structuring for forming an anode flow field is formed on the anode side; a cathode plate with a cathode side and a coolant side, wherein a second structuring for forming a cathode flow field is formed on the cathode side, wherein structural elements are arranged between the anode plate and the cathode plate for forming a coolant flow field, These structural elements are in contact with the coolant side of the anode and cathode plates. The invention also relates to a fuel cell stack with such a bipolar plate and a vehicle with such a fuel cell stack. Background technique [0002] Fuel cells use the chemical conversion of fuel and oxygen into water to generate electricity. For this purpose, the fuel cell contains a so-called membrane electrode assembly (MEA, for membrane electrode assembly) as a core component, w...
Claims
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IPC IPC(8): H01M8/0254H01M8/0258H01M8/0267H01M8/248F28F3/04H01M8/1018H01M8/0206H01M8/0213H01M8/0228
CPCF28F3/048F28F2250/02H01M8/0258H01M8/0254H01M8/0267H01M8/248H01M8/0206H01M8/0213H01M8/0228H01M2008/1095Y02E60/50Y02T90/40H01M2004/8694H01M2250/20
Inventor A·吉拉尼S·库马尔R·P·布拉迪恩S·福格特
Owner AUDI AG