CN115000439B

CN115000439B - Metal polar plate structure for improving fuel cell multilayer stack spacing reliability

Info

Publication number: CN115000439B
Application number: CN202210659231.8A
Authority: CN
Inventors: 徐黎明; 汪爱英; 郭鹏; 李桦; 杨华; 徐真
Original assignee: Aideman Hydrogen Energy Equipment Co ltd
Current assignee: Aideman Hydrogen Energy Equipment Co ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2023-02-03
Anticipated expiration: 2042-06-13
Also published as: CN115000439A

Abstract

The invention discloses a metal polar plate structure for improving the multilayer stacking limiting reliability of a fuel cell, which relates to the technical field of fuel cells and comprises a metal polar plate, wherein a plurality of convex blocks are respectively arranged on four sides of one side of the metal polar plate, and auxiliary stacking assemblies are respectively arranged on four side walls of the metal polar plate. The projection is arranged in the fuel cell stack, so that the support effect can be achieved between the two metal pole plates, the two metal pole plates cannot be further close to each other after the projection is contacted with the other metal pole plate, the sealing rubber wire is prevented from being further extruded, the sealing rubber wire can be protected, the sealing effect of the fuel cell stack is improved, and the service life of the fuel cell stack is prolonged.

Description

Metal polar plate structure for improving fuel cell multilayer stack spacing reliability

Technical Field

The invention relates to the technical field of fuel cells, in particular to a metal polar plate structure for improving the multi-layer stacking limiting reliability of a fuel cell.

Background

The fuel cell stack is formed by stacking a plurality of bipolar plates, each bipolar plate is formed by stacking a cathode plate, a catalytic membrane and an anode plate, and meanwhile, the adjacent cathode plate and the adjacent anode plate need to be sealed through a sealing glue line. In the prior art, the fuel cell stack needs to be compressed after being stacked. The sealing rubber line needs to bear the sealing function and also needs to play a supporting function between the bipolar plate and the membrane electrode, so that the processing precision of the sealing rubber line is very high, and otherwise, the situation that the sealing rubber line is excessively damaged easily occurs during pressing. In addition, once the fuel cell stack structure appears deformation, can bring very big influence for the sealant line, the condition such as sealing failure has appeared very easily, has reduced the life of fuel cell stack. In addition, the existing bipolar plate needs to use a limiting structure for limiting when being assembled, if the bipolar plate is not aligned accurately, the bipolar plate is easy to damage when being assembled, such as deformation caused by friction between the edge and the limiting structure.

Disclosure of Invention

The invention aims to provide a metal polar plate structure for improving the multi-layer stacking limiting reliability of a fuel cell, and aims to solve the technical problems that the assembly of a fuel cell stack in the prior art is easy to influence a rubber wire and damage a bipolar plate.

The invention provides a metal polar plate structure for improving the multi-layer stacking limiting reliability of a fuel cell, which comprises metal polar plates, wherein a plurality of convex blocks are respectively arranged on four sides of one side of each metal polar plate and used for supporting when two adjacent metal polar plates are pressed tightly, and auxiliary stacking assemblies are respectively arranged on four side walls of each metal polar plate and used for helping the metal polar plates to align and stack when being assembled.

Further, the four sides of metal polar plate opposite side are equipped with a plurality of recess respectively, recess and lug one-to-one joint cooperation, the cooperation of recess and lug not only can play the effect of support, can also prevent to take place the dislocation between two adjacent metal polar plates and remove.

Furthermore, the convex block is an arc bulge, the shape of the groove is matched with that of the convex block, and the arc bulge can improve the toughness compared with bulges in other shapes.

Furthermore, the top of the bump is provided with a downward-concave arc groove, and the groove is internally provided with an arc convex point matched with the arc groove.

Furthermore, the auxiliary stacking assembly comprises a plurality of auxiliary blocks, and the upper end and the lower end of each auxiliary block respectively protrude out of the upper end face and the lower end face of the metal pole plate.

Furthermore, the two sides of the upper end and the lower end of each auxiliary block are provided with inclined planes for guiding, so that the function of guiding and calibrating is achieved.

Further, the distance between two adjacent auxiliary blocks on the same side of the metal pole plate is equal to the width of the auxiliary blocks.

Compared with the prior art, the invention has the beneficial effects that:

(1) The projection is arranged in the fuel cell stack, so that the support effect can be achieved between the two metal pole plates, the two metal pole plates cannot be further close to each other after the projection is contacted with the other metal pole plate, the sealing rubber wire is prevented from being further extruded, the sealing rubber wire can be protected, the sealing effect of the fuel cell stack is improved, and the service life of the fuel cell stack is prolonged.

(2) According to the invention, through the matching between the convex block and the groove, the positioning and calibrating effects on the stacking between two adjacent metal pole plates can be assisted, and the convex block is clamped with the groove, so that the two adjacent metal pole plates can not move in the horizontal direction after being calibrated and stacked, the probability of the electric pile collapsing at the later stage of the use of the fuel cell can be reduced, and the service life of the fuel cell is effectively prolonged.

(3) The arc groove, the arc salient point, the bump and the groove can be formed in a one-step punching mode during punching production of the metal polar plate, and the manufacturing is simple and convenient.

(4) In the invention, the auxiliary blocks on the same side of two adjacent metal pole plates are mutually staggered and clamped, so that the effect of auxiliary limiting can be achieved, if the two adjacent metal pole plates are not aligned, the auxiliary block on one metal pole plate cannot be clamped between the auxiliary blocks on the other metal pole plate, and therefore, whether the metal pole plates are aligned or not can be quickly found by an operator.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic perspective view of the present invention;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a front view of the present invention as it is assembled into a stack.

Reference numerals:

1. a metal plate; 2. a bump; 3. a groove; 4. an arc groove; 5. arc salient points; 6. an auxiliary stacking assembly; 7. an auxiliary block; 8. a bevel.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, an embodiment of the present invention provides a metal plate structure for improving the multi-layer stacking limit reliability of a fuel cell, including a metal plate 1, where four sides of one side of the metal plate 1 are respectively provided with a plurality of bumps 2, when the stacked metal plates 1 are compressed, due to the existence of a sealing rubber wire and a catalytic film, the two metal plates 1 cannot be completely attached to each other, when the prior art is processed, the sealing rubber wire is continuously compressed through high-pressure compression, and if the processing precision of the sealing rubber wire is insufficient, the sealing rubber wire is easily damaged under high pressure, and finally, the sealing effect is poor. However, the bump 2 is arranged in the fuel cell stack, so that the bump 2 can play a supporting role between two metal pole plates 1, when the bump 2 contacts another metal pole plate 1, the two metal pole plates 1 cannot be further close to each other, and further, the sealing rubber wire is prevented from being further extruded, so that the sealing rubber wire can be protected, the sealing effect and the service life of the fuel cell stack are improved, the auxiliary stacking assemblies 6 are respectively arranged on four side walls of the metal pole plates 1, and because the metal pole plates 1 are thin, when being stacked, the situation of dislocation or slight inclination of part of the metal pole plates 1 can occur, and the metal pole plates 1 can be easily damaged when being compressed, so that the stacking work of the metal pole plates 1 can be well limited and aligned through the arrangement of the auxiliary stacking assemblies 6, and the damage of the metal pole plates 1 is prevented.

Specifically, the four sides of 1 opposite side of metal polar plate are equipped with a plurality of recess 3 respectively, recess 3 and the cooperation of 2 one-to-one joints of lug, lug 2's effect can restrict the distance between two metal polar plates 1, play the supporting role between the two, here has set up recess 3, but when lug 2 inserts in the recess 3 completely, certain distance still can exist between two metal polar plates 1, furthermore, through the cooperation between lug 2 and the recess 3, can assist and play the effect of location calibration to piling up between two adjacent metal polar plates 1, and lug 2 and recess 3's block, make two adjacent metal polar plates 1 after the calibration is piled up, the ascending removal in horizontal direction can not appear again, and also can reduce the probability that the waist collapsed in the later stage that fuel cell used, the effectual life who prolongs fuel cell.

Specifically, lug 2 is the circular arc protruding, the shape of recess 3 is identical with lug 2, compares with the arch of other shapes, and the bellied atress of circular arc can be more even, can avoid arch and recess 3 to take place to deform under high pressure state.

Specifically, the top of lug 2 is equipped with undercut's circular arc groove 4, be equipped with in the recess 3 with circular arc groove 4 complex circular arc bump 5, the effect of circular arc groove 4 and circular arc bump 5 is the same with lug 2 and recess 3's effect, and the homoenergetic can play the effect to the support between two adjacent metal polar plates 1, also can play the effect that prevents that two metal polar plates 1 from taking place to remove.

The arc groove 4, the arc salient point 5, the convex block 2 and the groove 3 can be formed in a one-step punching mode during punching production of the metal polar plate 1, and are simple to process and convenient to produce.

Specifically, supplementary stack subassembly 6 includes a plurality of auxiliary block 7, the upper and lower both ends of auxiliary block 7 are outstanding respectively in two upper and lower terminal surfaces of metal polar plate 1, specifically refer to fig. 5, the mutual dislocation block between the auxiliary block 7 on the same side of two adjacent metal polar plates 1, can play supplementary spacing effect like this, if two adjacent metal polar plates 1 do not align, then the auxiliary block 7 on one metal polar plate 1 can't block in between the auxiliary block 7 on another metal polar plate 1, consequently, whether metal polar plate 1 aligns, discovery that operating personnel can be very fast.

Specifically, every both sides of auxiliary block 7 upper end and lower extreme all are equipped with the inclined plane 8 that is used for the direction, and inclined plane 8 can play good direction and align the effect, even there is certain dislocation between the two when two metal polar plate 1 align, through the mutual extrusion direction on inclined plane 8, calibration alignment that also can be quick.

Specifically, the distance between two adjacent auxiliary blocks 7 on the same side of the metal pole plate 1 is equal to the width of the auxiliary block 7, and when the auxiliary block 7 on one metal pole plate 1 is clamped between two auxiliary blocks 7 of another metal pole plate 1, the auxiliary block cannot move in the horizontal direction, so that the limiting effect can be achieved.

In addition, the auxiliary blocks 7 on the metal pole plates 1 on two adjacent sides of one metal pole plate 1 can be just attached after the galvanic pile is compressed, as shown in fig. 5, the auxiliary blocks can also play a certain supporting role between the metal pole plates 1 like the convex blocks 2 and the grooves 3, and because the auxiliary blocks 7 are arranged on the side edges of the metal pole plates 1, whether the two metal pole plates 1 are compressed in place or not is convenient to observe.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A metal polar plate structure for improving spacing reliability of fuel cell multilayer stack dress, including metal polar plate (1), its characterized in that: the four sides of metal polar plate (1) one side are equipped with a plurality of lug (2) respectively, be equipped with supplementary stack subassembly (6) on four lateral walls of metal polar plate (1) respectively, the four sides of metal polar plate (1) opposite side are equipped with a plurality of recess (3) respectively, recess (3) and lug (2) one-to-one joint cooperation, supplementary stack subassembly (6) include a plurality of auxiliary block (7), the upper and lower both ends of auxiliary block (7) are outstanding respectively in two upper and lower terminal surfaces of metal polar plate (1), the block that misplaces each other between two adjacent metal polar plate (1) auxiliary block (7) on the same side, the distance between two adjacent auxiliary block (7) on the same side of metal polar plate (1) equals the width of auxiliary block (7).

2. The metal plate structure for improving the reliability of a fuel cell multi-stack confinement of claim 1, wherein: the convex block (2) is a circular arc bulge, and the shape of the groove (3) is matched with that of the convex block (2).

3. The metal plate structure for improving fuel cell multi-layer stack retention reliability of claim 2, wherein: the top of lug (2) is equipped with undercut circular arc groove (4), be equipped with in recess (3) with circular arc groove (4) complex circular arc bump (5).

4. The metal plate structure for improving the reliability of a fuel cell multi-layer stack-up confinement of claim 3, wherein: and inclined planes (8) for guiding are arranged on two sides of the upper end and the lower end of each auxiliary block (7).