用于燃料电池的极板、双极板及燃料电池

Abstract

本实用新型公开了一种用于燃料电池的极板(1、2)，所述极板(1、2)包括：具有至少一个端口(11)的端口区；活性区；和位于所述端口区与所述活性区之间的分配区，所述分配区具有分配区流道；其中，在所述端口(11)与所述分配区之间设有支撑结构(15)，所述支撑结构(15)在朝向所述分配区流道的侧面包括至少一个侧向突出结构(151)，所述至少一个侧向突出结构(151)相应地伸入到与所述端口(11)连通且在所述侧面上的相邻的介质流通口(12)之间。本实用新型还公开了一种用于燃料电池的双极板和一种燃料电池。根据本实用新型的某些示例性实施例，有助于改善燃料电池内部电流均匀性和燃料电池本身的性能均衡性。

Claims

1. A polar plate (1, 2) for a fuel cell, characterized in that The polar plate (1, 2) comprises: a port region having at least one port (11); an active region; and a distribution region between the port region and the active region, the distribution region having a distribution region flow channel; wherein a support structure (15) is provided between the port (11) and the distribution region, the support structure (15) comprising at least one lateral protrusion (151) on a side facing the distribution region flow channel, the at least one lateral protrusion (151) extending into between adjacent media flow ports (12) on the side in communication with the port (11) respectively.

2. The polar plate (1, 2) for a fuel cell according to claim 1, wherein the support structure (15) comprises a plurality of lateral protrusions (151) and a plurality of media flow ports (12); and wherein the plurality of lateral protrusions (151) and the plurality of media flow ports (12) are arranged alternately one by one.

3. The polar plate (1, 2) for a fuel cell according to claim 2, wherein the plurality of lateral protrusions (151) are identical in shape and size, each being a half-cylindrical surface with a diameter of 0.8-1.5 mm; the plurality of lateral protrusions (151) are arranged equidistantly along an arrangement direction, the distance being 2-5 mm; and the plurality of media flow ports (12) are identical in shape and size, and the length of the media flow ports (12) along the arrangement direction is 1.2-3.5 mm.

4. The polar plate (1, 2) for a fuel cell according to claim 1, wherein the portion of the side between adjacent lateral protrusions (151) is completely hollowed out to form the media flow ports (12).

5. The polar plate (1, 2) for a fuel cell according to claim 1, wherein a recess is formed on a polar plate main plane (P) and opens to the media flow ports (12).

6. The polar plate (1, 2) for a fuel cell according to claim 5, wherein the recess is configured as a sloping curved surface to enlarge the flow capacity of the media flow ports (12); and the recess is configured to have a smooth arc surface.

7. The polar plate (1, 2) for a fuel cell according to claim 1, wherein the support structure (15) is formed as a platform structure protruding from a polar plate main plane (P) and is configured to support a sub-gasket (3) of a membrane electrode assembly.

8. A bipolar plate for a fuel cell, characterized by The bipolar plate is formed by two polar plates (1, 2) stacked together; wherein the polar plates are polar plates (1, 2) for a fuel cell according to any one of claims 1-7.

9. The bipolar plate for a fuel cell according to claim 8, wherein the polar plates (1, 2) are metal polar plates, and the two polar plates (1, 2) are combined together by welding or adhesive.

10. A fuel cell characterized by comprising: The fuel cell comprises: a membrane electrode assembly having a sub-gasket (3); a plurality of bipolar plates for a fuel cell according to claim 8 or 9; and The bipolar plates are stacked together in a stacking direction, and the membrane electrode assemblies are provided between adjacent bipolar plates.

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