1. Technical Field
This application relates in general to fuel cell devices and fluid flow plate assemblies and in particular to fuel cell devices and fluid flow plate assemblies that are modularized.
2. Description of the Related Art
Fluid flow plates are structures that are designed for fluid-related applications, such as for carrying, delivering, dividing, and/or distributing one or more types of fluids. The term “fluid” is used here in a broad sense, which can be anything that is capable of flowing from one point to another. For example, a fluid may include air, gas, liquid, viscous fluid, etc., each of which is capable of flowing or moving itself or a part of it from one point to another.
As an illustrative example, one of the many uses for fluid flow plates is fuel cell applications, in which fluid flow plates may be used to transport, guide, and/or distribute one or more kinds of “fuel”, which may be in a liquid or gaseous form, for generating electric power.
To facilitate the manufacturing, expansion, or design flexibility of fuel cell devices, fluid flow plate assemblies, or both, it may be desirable to provide modularized designs for fuel cell devices, fluid flow plate assemblies, or both.
In one embodiment, a fuel cell module may include a membrane electrode assembly, two gas diffusion layers, two current collectors, two sealing members, a fluid flow plate assembly. The fluid flow plate assembly may include a first manifold, a second manifold, and a fluid flow channel. The membrane electrode assembly may include at least one membrane for fuel cell reactions. The two gas diffusion layers may be respectively coupled with two opposite sides of the membrane electrode assembly. The two current collectors respectively coupled with the two gas diffusion layers, and the two sealing members respectively coupled with the two current collectors.
The fluid flow plate assembly may be coupled with the membrane electrode assembly at a first side of the two opposite sides of the membrane electrode assembly, with at least a corresponding one of the two gas diffusion layers, at least a corresponding one of the two current collectors, and at least a corresponding one of the two sealing members coupled between the fluid flow plate assembly and the first side of the membrane electrode. The first manifold may have a fluid inlet for receiving an incoming fluid and may extend along a first direction to provide a channel for transporting the incoming fluid partially along the first direction. The first manifold may have at least one distribution outlet, wherein the first manifold releases at least one portion of the incoming fluid as a released fluid through the at least one distribution outlet. The second manifold may have a fluid outlet for discharging a discharged fluid, which may include at least one portion of the incoming fluid. The second manifold may extend along a second direction and have a channel for transporting the discharged fluid partially along the second direction. The second manifold receives the discharged fluid through at least one discharged fluid inlet on the second manifold. The fluid flow channel may couple between the first manifold and the second manifold and between at least one of the at least one distribution outlet and at least one of the at least one discharged fluid inlet for distributing at least one portion of the released fluid.
The fluid flow channel may have multiple channel sections extending in at least two directions and extending substantially along a fluid distribution plane. The at least one portion of the released fluid flowing through the at least one fluid flow channel and to the at least one of the at least one discharged fluid inlet as at least one portion of the discharged fluid. The fluid flow channel have an exposed side that is coupled with a membrane of the at least one membrane. Both the first direction and the second direction may be substantially parallel with the fluid distribution plane.
In another embodiment, a fuel cell module may include a membrane electrode assembly, two gas diffusion layers, two current collectors, two sealing members, a fluid flow plate assembly. The fluid flow plate assembly may include a first manifold, a second manifold, and a fluid flow channel. The membrane electrode assembly may include at least one membrane for fuel cell reactions. The two gas diffusion layers may be respectively coupled with two opposite sides of the membrane electrode assembly. The two current collectors respectively coupled with the two gas diffusion layers, and the two sealing members respectively coupled with the two current collectors.
The fluid flow plate assembly may be coupled with the membrane electrode assembly at a first side of the two opposite sides of the membrane electrode assembly, with at least a corresponding one of the two gas diffusion layers, at least a corresponding one of the two current collectors, and at least a corresponding one of the two sealing members coupled between the fluid flow plate assembly and the first side of the membrane electrode. The first manifold may have a fluid inlet for receiving an incoming fluid and may have a channel for transporting the incoming fluid partially along the first direction. The first manifold may have at least one distribution outlet, wherein the first manifold releases at least one portion of the incoming fluid as a released fluid through the at least one distribution outlet. The second manifold may have a fluid outlet for discharging a discharged fluid, which may include at least one portion of the incoming fluid. The second manifold may have a channel for transporting the discharged fluid partially along the second direction. The second manifold receives the discharged fluid through at least one discharged fluid inlet on the second manifold. The fluid flow channel may couple between the first manifold and the second manifold and between at least one of the at least one distribution outlet and at least one of the at least one discharged fluid inlet for distributing at least one portion of the released fluid.
The fluid flow channel may have multiple channel sections extending in at least two directions and extending substantially along a fluid distribution plane. The at least one portion of the released fluid flowing through the at least one fluid flow channel and to the at least one of the at least one discharged fluid inlet as at least one portion of the discharged fluid. The fluid flow channel have an exposed side that is coupled with a membrane of the at least one membrane. Both the first direction and the second direction may be substantially parallel with the fluid distribution plane.
Embodiments disclosed herein can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
Embodiments disclosed herein include fuel cell modules that have fluid flow plate assembly having one or more fluid flow channels. Multiple fuel cell modules may be stacked sequentially to form a fuel cell system or fuel cell battery. And electrodes of fuel cell modules may be coupled in series, in parallel, or in a combination of both to provide a desired voltage, current, or capacity. Multiple fluid flow channels may be arranged along one or more directions to provide one-, two-, or three-dimensional expansions of fluid flow channels. For example, two fluid flow channels may be placed on opposite sides of a dividing wall. In some embodiments, multiple fluid flow channels may share one or two common manifolds for the intake and/or discharge of a fluid.
In some embodiments, the fluid flow plate assembly 10 may include more than fluid flow channels coupled between the first manifold 11 and the second manifold 12. The first manifold 11 may have a fluid inlet 11a for receiving the incoming fluid and extends along a first direction (such as a direction that is generally parallel to the top edge of the fluid flow plate assembly 10) to provide a channel for transporting the incoming fluid partially along the first direction. The second manifold 12 may have a fluid outlet 12a for discharging a discharged fluid, and the discharged fluid, as discussed above, may include a portion of the incoming fluid (or the entirety of the incoming fluid that has been reacted). The second manifold 12 may extend along a second direction (such as a direction that is generally parallel to the bottom edge of the fluid flow plate assembly 10) to provide a channel for transporting the discharged fluid partially along the second direction.
The first manifold 11 may release the incoming fluid through one or more fluid distribution outlets (the openings between the first manifold 11 and flow channels) on the first manifold 11. The second manifold 12 may receive the discharged fluid through one or more discharged fluid inlets (the openings between the second manifold 12 and flow channels) on the second manifold 12. The fluid flow channel C, as illustrated in
In some embodiments, the first manifold 11 may have a round (or nearly round) cross section with openings serving as the distribution outlets, which may arranged in a portion of a sidewall region of the first manifold 11. Each opening may occupy an angle range within the range of about 0 to about 180 degrees of a section of the first manifold 11 with respect to the center point of a cross section of the first manifold 11. Similarly, the second manifold 12 may have a round cross section with openings serving as the discharged fluid inlets, which may be arranged in a portion of a sidewall region of the second manifold 12. Each opening may be occupying an angle range within the range of about 0 to about 180 degrees of a section of the manifold with respect to the center of a cross section of the manifold.
Specifically, in the embodiment illustrated in
In some embodiments, when multiple fuel cell modules are stacked over each other, fluid flow channels C may be placed on both sides of the fluid flow plate assembly 10, with a dividing wall between each pair of opposing fluid flow channels. Under such alternative design, each pair of the opposing fluid flow channels may have their outer surfaces exposed respectively to the two external sides the fluid flow plate assembly 10. Depending on its applications, design need, system size, or other considerations, a fluid flow plate assembly may have two or more fluid flow channels arranged (or expanded) one-, two-, or three-dimensionally.
In embodiments where two fluid flow channels are coupled with the two opposite sides of the fluid flow plate assembly 10, another main body structure may be coupled with the second fluid flow channel. In one embodiment, a fuel cell module or device may have, in addition to the main body 23 and the fluid flow channel C described above, a parallel fluid flow channel separated from and substantially parallel to the fluid flow channel may be provided. The parallel fluid flow channel may be similarly coupled between the first manifold 11 and the second manifold 12 illustrated above, with the parallel fluid flow channel having multiple channel sections extending in two or more directions and extending substantially along the fluid distribution plane. The parallel fluid flow channel may have an exposed side. In addition, a parallel membrane electrode assembly may be included, which may have one or more membranes. One of the membranes may be coupled with the exposed side of the parallel fluid flow channel. Similarly, a parallel gas diffusion layer may be coupled with the parallel membrane electrode assembly, and a parallel current collector may be coupled with the parallel gas diffusion layer. A sealing member may also be coupled with the parallel current collector.
Embodiments herein provide a planar fuel cell module device and fuel cell module thereof. An embodiment of a fuel cell module comprises a main body and a fluid flow plate coupled with each other. In some embodiments, the fluid flow plate is coupled with two fuel cell modules to form a multi-layered fuel cell module. The sealing member may include a polymer or insulating material, and the current collector may include a metal, an electrically conductive composite material, or one or more other conductive materials. Additionally, the sealing member, the current collector, and the membrane electrode assembly can be connected by hot pressing or conductive adhesive. Since the fuel cell module has relatively small dimensions and is suitable for serial or parallel configuration, it can be widely applied in electronic apparatuses, vehicles, military equipments, the aerospace industry and so on.
It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims and their equivalents.
Number | Date | Country | Kind |
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099107218 | Mar 2010 | TW | national |
This application claims priority from U.S. provisional application No. 61/267,387, filed on Dec. 7, 2009, the entirety of which is incorporated by reference herein. The application also relates to three co-pending applications claiming priority also from U.S. provisional application No. 61/267,387. The first one is entitled “Fluid Flow Plate Assemblies” filed on Aug. 9, 2010 (Attorney Docket No. 06720.0314); the second one is entitled “Fluid Flow Plate Assembly Having Parallel Flow Channels” filed on Aug. —, 2010 (Attorney Docket No. 06720.0315); and the third one is entitled “Fuel Cell Devices” filed on Aug. —, 2010 (Attorney Docket No. 06720.0317). This application further claims priority from Taiwan Patent Application No. 099107218, filed on Mar. 12, 2010, the entirety of which is incorporated by reference herein.
Number | Date | Country | |
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61267387 | Dec 2009 | US |