A fuel cell stack

Abstract

The present invention discloses a rib-reinforced structure for a fuel cell collector plate. The structure comprises a collector plate and an insulating plate. The surfaces where the collector plate and the insulating plate meet are provided with raised reinforcing ribs, while the surfaces where the insulating plate and the collector plate meet are provided with recesses corresponding to the rib-reinforced structure. The interlaced reinforcing ribs enhance the structural strength of the collector plate, prevent deformation under stress, and improve the stability of the fuel cell stack system.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, in particular to a rib reinforcement structure of a fuel cell collector plate, and more particularly to a mechanical connection structure thereof. Background Art

[0002] The fuel cell current collecting plate is attached to the reaction electrode and is an effective carrier for collecting charges on the reaction interface. During the stacking process, the traditional current collecting plate is subject to the pre-tightening force of the screw and is prone to bending and deformation, causing the center of the current collecting plate to arch. This will lead to uneven fitting with the electrode plate, affecting current transmission and reducing the volume power density of the fuel cell stack. Summary of the Invention

[0003] The present invention aims to provide a rib-reinforced structure for a fuel cell collector plate, enhancing the overall structural strength of the plate and ensuring the stability of the fuel cell stack. This structure prevents the plate from bending under the preload force applied during stacking. The preload force applied around the fuel cell stack during stacking can cause the plate to bulge and bend, compromising current collection efficiency. This technical solution overcomes the shortcomings and deficiencies of the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a fuel cell collector plate rib reinforcement structure, including a collector plate and an insulating plate, wherein the surface where the collector plate and the insulating plate are bonded are distributed with raised reinforcing ribs, and the surface where the insulating plate and the collector plate are bonded are distributed with embedded grooves corresponding to the above-mentioned reinforcing rib distribution structure.

[0005] The present invention discloses a rib reinforcement structure for a fuel cell collector plate, which utilizes mutually staggered reinforcement rib structures to improve the structural strength of the collector plate, avoid deformation of the collector plate under stress, and improve the stability of the fuel cell stack system. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the existing technology structure.

[0007] Figure 2 It is a structural schematic diagram of the present invention.

[0008] Figure 3 This is a structural diagram of the first embodiment of the reinforcing rib of the present invention.

[0009] Figure 4 This is a structural diagram of the second embodiment of the reinforcing rib of the present invention.

[0010] in:

[0011] 1. Collector plate;

[0012] 2. Insulation board;

[0013] 3. Strengthen the ribs;

[0014] 4. Embossed groove;

[0015] 5. Diamond-shaped ribs;

[0016] 6. Rectangular ribs;

[0017] 7. Vertex;

[0018] 8. Edge;

[0019] 9. Transverse ribs;

[0020] 10. Longitudinal ribs;

[0021] 11. Bipolar plates;

[0022] 12. Tighten the bolts;

[0023] 13. Stack end plate. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] The present invention discloses a rib-reinforced structure for a fuel cell current collector plate. This structure differs from existing technologies in that it comprises a current collector plate 1 and an insulating plate 2. The surfaces of the current collector plate 1 and insulating plate 2 are distributed with raised reinforcing ribs 3 to enhance the structural strength of the current collector plate. The surfaces of the insulating plate 2 and current collector plate 1 are distributed with recesses 4 corresponding to the arrangement of the reinforcing ribs 3. During stacking, the reinforcing ribs of the current collector plate engage with the recesses 4 of the insulating plate, positioning the current collector plate, effectively resisting warping caused by preload, and ensuring complete contact between the current collector surface and the bipolar plate 11.

[0026] In a specific implementation, the reinforcing ribs 3 are composed of a plurality of diamond-shaped convex ribs 5, and the plurality of diamond-shaped convex ribs 5 are distributed in a matrix shape on the surface of the current collecting plate 1.

[0027] In a specific implementation, rectangular ribs 6 are distributed around the diamond-shaped ribs 5. The four vertices 7 of the diamond-shaped ribs 5 correspond to a side 8 of the rectangular ribs 6, and the centers of the vertices 7 and the sides 8 overlap. The surface of the insulating plate 2 is distributed with embedded grooves 4 corresponding to the distribution structure of the reinforcing ribs 3, ensuring the matching of the current collecting plate and the insulating plate.

[0028] In practice, the reinforcing ribs 3 are composed of a plurality of transverse ribs 9 and a plurality of longitudinal ribs 10 arranged perpendicularly to each other. The transverse ribs 9 are arranged perpendicular to the longitudinal ribs 10, and the transverse ribs 9 are arranged in parallel at equal intervals, while the longitudinal ribs 10 are arranged in parallel at equal intervals. The surface of the insulating plate 2 is provided with recessed grooves 4 corresponding to the arrangement of the reinforcing ribs 3, ensuring that the current collecting plate and the insulating plate are aligned.

[0029] In a specific implementation, both ends of the transverse rib 9 protrude from the longitudinal ribs 10 distributed on the outermost sides, and both ends of the longitudinal rib 10 protrude from the transverse ribs 9 distributed on the outermost sides.

[0030] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to the above description. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A fuel cell stack, characterized in that: The fuel cell current collector plate rib reinforcement structure comprises a current collector plate (1) and an insulating plate (2), wherein the current collector plate (1) and the insulating plate (2) are bonded to each other with convex reinforcing ribs (3), and the insulating plate (2) and the current collector plate (1) are bonded to each other with embedded grooves (4) corresponding to the distribution structure of the reinforcing ribs (3). The reinforcing ribs (3) are composed of a plurality of rhombus-shaped convex ribs (5), and the plurality of rhombus-shaped convex ribs (5) are distributed in a matrix shape on the surface of the current collecting plate (1). The rhombus convex rib (5) is distributed with a rectangular convex rib (6) on the periphery thereof, and the four vertices (7) of the rhombus convex rib (5) are respectively arranged corresponding to one side (8) of the rectangular convex rib (6), and the centers of the vertices (7) and the sides (8) overlap; The fuel cell stack further includes a bipolar plate (11), which is arranged on one side of the current collecting plate (1); The fuel cell stack further comprises a stack end plate (13), which is arranged in contact with one side of the insulating plate (2).

2. A fuel cell stack, characterized in that: The fuel cell current collector plate rib reinforcement structure comprises a current collector plate (1) and an insulating plate (2), wherein the current collector plate (1) and the insulating plate (2) are bonded to each other with convex reinforcing ribs (3), and the insulating plate (2) and the current collector plate (1) are bonded to each other with embedded grooves (4) corresponding to the distribution structure of the reinforcing ribs (3). The reinforcing ribs (3) are composed of a plurality of transverse ribs (9) and a plurality of longitudinal ribs (10) that are perpendicularly distributed to each other, the transverse ribs (9) being perpendicular to the longitudinal ribs (10), the transverse ribs (9) being equally spaced and parallel to each other, and the longitudinal ribs (10) being equally spaced and parallel to each other; The two ends of the transverse convex rib (9) protrude from the longitudinal convex ribs (10) distributed on the outermost sides, and the two ends of the longitudinal convex rib (10) protrude from the transverse convex ribs (9) distributed on the outermost sides. The fuel cell stack further includes a bipolar plate (11), which is arranged on one side of the current collecting plate (1); The fuel cell stack further comprises a stack end plate (13), which is arranged in contact with one side of the insulating plate (2).

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