CN216288553U - Single cell integrated fastening structure and fuel cell - Google Patents

Abstract

The utility model provides a single cell integrated fastening structure and a fuel cell, and relates to the technical field of fuel cells. The monocell integrated fastening structure comprises a membrane electrode, an anode plate, a cathode plate and a telescopic insert buckle; the membrane electrode is arranged between the anode plate and the cathode plate; the membrane electrode, the anode plate and the cathode plate are all provided with through holes for inserting the buckles; the inserting part of the inserting buckle can penetrate through holes in the membrane electrode, the anode plate and the cathode plate and connect and fasten the membrane electrode, the anode plate and the cathode plate together. The fuel cell includes a plurality of unit cell integrated fastening structures. The technical effects of improving the performance and prolonging the service life are achieved.

Description

Single cell integrated fastening structure and fuel cell

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a single cell integrated fastening structure and a fuel cell.

Background

Fuel Cells (FC) are devices that electrochemically convert fuel oxidation to produce energy at relatively high efficiencies, with high conversion efficiencies, low pollutant emissions, and high power densities. Because the current output is limited, Proton Exchange Membrane Fuel Cell (PEMFC) single cells are difficult to meet the actual application requirements, and the actual PEMFC product is almost a large-scale stack structure (hereinafter referred to as a stack) formed by packaging a plurality of single cells together, wherein the performance of each single cell directly affects the performance of the whole stack, so in order to improve the life of the whole PEMFC stack, it is fundamentally necessary to prevent the occurrence of "short plates" of the stack performance or life, and to enhance the performance consistency between the single cells in the stack, i.e. the voltage balance.

The stack is mainly composed of Bipolar Plates (BP), Membrane Electrode Assemblies (MEA), End plates (End plates), fasteners, sealing elements, and the like. The bipolar plate supports the entire cell frame and functions to distribute reactant gases, collect current, connect cells in series, and the like. The Membrane Electrode Assembly (MEA) is the heart of a Proton Exchange Membrane (PEM) fuel cell stack and comprises a standard five-layer MEA of two Gas Diffusion Layers (GDLs), a PEM, and anode and cathode electrocatalyst layers, in addition to two additional sealing layers, an anode layer and a cathode layer. The assembly technology is one of key technologies for developing fuel cell stacks, and after the cell single sheets are assembled into the cell stacks, the average performance of the single sheets is lower than that before the cell stacks are assembled in many cases, wherein the assembly has a great influence on the performance of the cell stacks, and once the stack is assembled, because the positioning and fastening modes have insufficient precision, dislocation occurs, carbon paper can invade a flow channel, so that the water plugging problem occurs, the performance of the single cell can be influenced, and the service life of the stack can be directly influenced.

Therefore, it is an important technical problem to be solved by those skilled in the art to provide a single cell integrated fastening structure and a fuel cell that can improve the performance and the service life of the cell.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a single cell integrated fastening structure and a fuel cell, which are used for relieving the technical problem that the fastening mode in the prior art has adverse effects on the performance and the service life of the cell.

In a first aspect, an embodiment of the present invention provides a fastening structure for a single cell, including a membrane electrode, an anode plate, a cathode plate, and a retractable buckle;

the membrane electrode is arranged between the anode plate and the cathode plate;

the membrane electrode, the anode plate and the cathode plate are all provided with through holes for inserting the buckles;

the inserting part of the inserting buckle can penetrate through the through holes on the membrane electrode, the anode plate and the cathode plate and connect and fasten the membrane electrode, the anode plate and the cathode plate together.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the insert buckle includes an insert buckle framework, the insert part, and a connection part for connecting a plurality of insert buckles with each other;

the inserting part and the connecting part are fixedly arranged on the inserting buckle framework;

the diameter of the inserting buckle framework is larger than that of the through hole;

the two sides of the eye-splice framework are provided with the connecting parts.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the insertion part includes a plurality of first outer latches;

a plurality of first outer buckle sets up the edge of eye-splice skeleton, just the edge of eye-splice skeleton be provided with first outer buckle complex spacing platform.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a distance between the limiting table and a clamping point of the first outer clip is equal to thicknesses of the membrane electrode, the anode plate, and the cathode plate.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the plurality of first outer buckles are symmetrically disposed at edges of the buckle frame.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the connecting portion includes a second outer buckle and an inner buckle capable of being fitted with the second outer buckle;

the second outer buckle is arranged on the lower side of the inserting buckle framework and is positioned among the first outer buckles, and the length of the second outer buckle is greater than that of the first outer buckles;

the inner buckle is arranged at the top of the buckle framework.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the number of the second outer buckles and the number of the inner buckles are multiple.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein corners of the membrane electrode, the anode plate, and the cathode plate are all provided with the through holes.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the number of the through holes is four.

In a second aspect, an embodiment of the utility model provides a fuel cell including a plurality of the single cell integrated fastening structures.

Has the advantages that:

the embodiment of the utility model provides a single cell integrated fastening structure, which comprises a membrane electrode, an anode plate, a cathode plate and a telescopic insert buckle, wherein the membrane electrode is fixed on the anode plate; the membrane electrode is arranged between the anode plate and the cathode plate; the membrane electrode, the anode plate and the cathode plate are all provided with through holes for inserting the buckles; the inserting part of the inserting buckle can penetrate through holes in the membrane electrode, the anode plate and the cathode plate and connect and fasten the membrane electrode, the anode plate and the cathode plate together.

When specifically using, the staff can insert the plug part of eye-splice through-hole on membrane electrode, anode plate and the negative plate three to make the one end of plug part expose outside, thereby can be in the same place membrane electrode, anode plate and negative plate three connect the fastening, through such setting, do not have the dislocation problem between membrane electrode, anode plate and the negative plate three, thereby improve the performance of battery, improve life.

Embodiments of the present invention provide a fuel cell including a plurality of single cell integrated fastening structures, which has the above advantages compared to the prior art and will not be described herein again.

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 schematic view of a cell integrated fastening structure provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a plug-in buckle in the single cell integrated fastening structure provided in the embodiment of the present invention;

fig. 3 is a schematic view of the connection of a plurality of single cell integrated fastening structures provided by the embodiment of the utility model;

fig. 4 is a schematic diagram of a single cell in a single cell integrated fastening structure provided by an embodiment of the utility model.

Icon:

100-a membrane electrode;

200-an anode plate;

300-a cathode plate;

400-inserting and buckling; 410-a buckle framework; 411-a limit table; 420-a plug-in part; 421-a first outer buckle; 430-a connecting portion; 431-a second outer buckle; 432-inner snap fastener;

500-through hole.

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. 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 is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Referring to fig. 1, 2, 3 and 4, an embodiment of the present invention provides a single cell integrated fastening structure, including a membrane electrode 100, an anode plate 200, a cathode plate 300 and a retractable buckle 400; the membrane electrode 100 is disposed between both the anode plate 200 and the cathode plate 300; the membrane electrode 100, the anode plate 200 and the cathode plate 300 are all provided with through holes 500 for inserting the buckles 400; the inserting part 420 of the inserting buckle 400 can penetrate through the through holes 500 of the membrane electrode 100, the anode plate 200 and the cathode plate 300 and connect and fasten the membrane electrode 100, the anode plate 200 and the cathode plate 300 together.

When specifically using, the staff can insert the grafting portion 420 of eye-splice 400 into membrane electrode 100, the through-hole 500 on anode plate 200 and the negative plate 300 three to make the one end of grafting portion 420 expose in the negative plate 300 and deviate from one side of membrane electrode 100, thereby can be in the same place membrane electrode 100, anode plate 200 and negative plate 300 three connect the fastening, through such setting, do not have the dislocation problem between membrane electrode 100 anode plate 200 and the negative plate 300 three, thereby improve the performance of battery, improve life.

Wherein, the buckle 400 is arranged in a telescopic manner, that is, when the inserting part 420 on the buckle 400 is inserted into the through hole 500 on the membrane electrode 100, the anode plate 200 and the cathode plate 300, the inserting part 420 can be inwardly deviated to be inclined, and when the front end of the inserting part 420 is exposed at one side of the cathode plate 300 departing from the membrane electrode 100, the front end of the inserting part 420 can be restored to be vertical under the action of the elastic potential energy of itself, thereby completing the connection and fixation of the membrane electrode 100, the anode plate 200 and the cathode plate 300.

Among them, the membrane electrode 100, the anode plate 200 and the cathode plate 300 form a single cell.

Referring to fig. 1, 2, 3 and 4, in an alternative of the present embodiment, a buckle 400 includes a buckle frame 410, a plug part 420 and a connection part 430 for connecting a plurality of buckles 400 to each other; the inserting part 420 and the connecting part 430 are fixedly arranged on the inserting buckle framework 410; the diameter of the eye-splice framework 410 is larger than that of the through hole 500; the upper and lower sides of the buckle frame 410 are provided with connection parts 430.

Specifically, the insert buckle 400 includes an insert buckle frame 410, an insert part 420, and a connection part 430, wherein the insert part 420 and the connection part 430 are both disposed on the insert buckle frame 410, the insert part 420 is used to connect and fasten the membrane electrode 100, the anode plate 200, and the cathode plate 300, and the connection part 430 is used to connect two adjacent insert buckles 400.

The upper side and the lower side of the inserting buckle framework 410 are respectively provided with the connecting parts 430, and the connecting parts 430 on two adjacent inserting buckles 400 are mutually connected to complete the connection of the two adjacent inserting buckles 400, so that the dislocation problem between two adjacent single cells can be avoided, the self-positioning and the positioning accuracy can be improved, and the modularized stacking can be realized; in addition, in the process of operating the stack on the vehicle, the connecting part 430 can tightly connect the single cells, so that the overall impact resistance of the stack can be improved, and the probability of dislocation of the stack when the stack is impacted can be effectively avoided.

Referring to fig. 1, 2, 3 and 4, in an alternative of the present embodiment, the insertion part 420 includes a plurality of first outer latches 421; a plurality of first outer buckles 421 are arranged at the edge of the buckle frame 410, and a limit table 411 matched with the first outer buckles 421 is arranged at the edge of the buckle frame 410.

Wherein, the bottom side of the limiting table 411 is planar, and one end of the first outer clip 421 away from the limiting table 411 is hook-shaped and has a plane corresponding to the limiting table 411.

Specifically, a plurality of first outer buckles 421 set up in the edge of eye-splice skeleton 410, and when connecting membrane electrode 100, anode plate 200 and cathode plate 300 three, the staff inserts a plurality of first outer buckles 421 in through-hole 500, then the end of stretching into of first outer buckle 421 can expose in one side that cathode plate 300 deviates from membrane electrode 100 to it is fixed to accomplish membrane electrode 100, anode plate 200 and the connection of cathode plate 300 three.

Wherein, be provided with spacing platform 411 on eye-splice skeleton 410, accomplish the fastening work to membrane electrode 100, anode plate 200 and negative plate 300 three through spacing platform 411 and the cooperation of first outer buckle 421, specifically do, spacing platform 411 can with the anode plate butt, the one end that first outer buckle 421 deviates from spacing platform 411 can with negative plate 300 butt.

Referring to fig. 1, 2, 3 and 4, in an alternative of this embodiment, a distance between the limiting table 411 and a clamping point of the first outer buckle 421 is equal to thicknesses of the membrane electrode 100, the anode plate 200 and the cathode plate 300.

Specifically, the distance between the limit table 411 and the clamping point of the first outer clip 421 is set to be equal to the thickness of the sum of the membrane electrode 100, the anode plate 200 and the cathode plate 300, so that after the first outer clip 421 is inserted into the through hole 500, the membrane electrode 100, the anode plate 200 and the cathode plate 300 are fastened through the limit table 411 and the first outer clip 421.

It should be noted that, according to actual conditions and requirements, the distance between the limiting table 411 and the clamping point of the first outer clip 421 may be set to be slightly smaller than the thickness of the sum of the membrane electrode 100, the anode plate 200 and the cathode plate 300.

Referring to fig. 1, 2, 3 and 4, in an alternative of this embodiment, a plurality of first outer buckles 421 are symmetrically disposed at the edge of the buckle frame 410.

Specifically, the plurality of first outer buckles 421 are symmetrically disposed on the buckle frame 410, so that the influence of the structure of the buckle frame 410 on the upper portions of the membrane electrode 100, the anode plate 200 and the cathode plate 300 on other structures can be reduced.

Referring to fig. 1, 2, 3 and 4, in an alternative of the present embodiment, the connection portion 430 includes a second outer clip 431 and an inner clip 432 capable of being fitted with the second outer clip 431; the second outer buckles 431 are arranged on the lower side of the buckle frame 410 and are positioned among the plurality of first outer buckles 421, and the length of the second outer buckles 431 is greater than that of the first outer buckles 421; an inner clasp 432 is provided on top of the clasp frame 410.

Specifically, the connection of two adjacent buckles 400 can be completed through the second outer buckle 431 and the inner buckle 432, specifically, the second outer buckle 431 of the upper buckle 400 can be inserted into the inner buckle 432 of the lower buckle 400, and through such arrangement, a plurality of single cells composed of the membrane electrode 100, the anode plate 200 and the cathode plate 300 can be conveniently connected together.

It should be noted that the end of the second outer clip 431 away from the clip framework 410 is hook-shaped with the hook opening facing outward, and the end of the inner clip 432 away from the clip framework 410 is hook-shaped with the hook opening facing inward, so that the second outer clip 431 and the inner clip 432 can be connected together.

The second outer clip 431 is disposed at a lower portion of the buckle frame 410, and the second outer clip 431 is disposed between the plurality of first outer clips 421, so that the second outer clip 431 is prevented from affecting the first outer clips 421.

Referring to fig. 1, 2, 3 and 4, in an alternative of the present embodiment, both the second outer clip 431 and the inner clip 432 are plural in number.

Specifically, the number of the second outer snaps 431 and the number of the inner snaps 432 may be set to be plural, so that the connection stability between the adjacent unit batteries is improved.

Referring to fig. 1, 2, 3 and 4, in the alternative of this embodiment, through holes 500 are formed at corners of the membrane electrode 100, the anode plate 200 and the cathode plate 300.

Specifically, the through holes 500 are formed at the corners of the membrane electrode 100, the anode plate 200 and the cathode plate 300, so that the stability of the membrane electrode 100, the anode plate 200 and the cathode plate 300 after fastening is improved.

Referring to fig. 1, 2, 3 and 4, in an alternative to the present embodiment, the number of the through holes 500 is four.

Specifically, when the membrane electrode 100, the anode plate 200, and the cathode plate 300 are rectangular, the number of the through holes 500 may be four.

In addition, a person skilled in the art can set the positions and the number of the through holes 500 according to implementation requirements, and details are not described herein.

The present embodiment provides a fuel cell including a plurality of single cell integrated fastening structures.

Specifically, compared with the prior art, the fuel cell provided in this embodiment has the advantages of the above-mentioned single cell integrated fastening structure, and details are not repeated herein.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill 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 (10)

1. A cell integrated fastening structure, characterized by comprising: the membrane electrode assembly comprises a membrane electrode (100), an anode plate (200), a cathode plate (300) and a telescopic insert buckle (400);

the membrane electrode (100) is disposed between the anode plate (200) and the cathode plate (300);

through holes (500) for inserting the inserting buckles (400) are formed in the membrane electrode (100), the anode plate (200) and the cathode plate (300);

the inserting part (420) of the inserting buckle (400) can penetrate through the through holes (500) on the membrane electrode (100), the anode plate (200) and the cathode plate (300) and connect and fasten the membrane electrode (100), the anode plate (200) and the cathode plate (300) together.

2. The cell-integrated fastening structure according to claim 1, wherein the insert buckle (400) includes an insert buckle frame (410), the insert part (420), and a connecting part (430) for connecting a plurality of the insert buckles (400) to each other;

the inserting part (420) and the connecting part (430) are fixedly arranged on the inserting buckle framework (410);

the diameter of the inserting buckle framework (410) is larger than that of the through hole (500);

the connecting parts (430) are arranged on two sides of the eye-splice framework (410).

3. The cell integrated fastening structure according to claim 2, wherein the insertion part (420) includes a plurality of first outer catches (421);

a plurality of first outer buckle (421) set up the edge of eye-splice skeleton (410), just the edge of eye-splice skeleton (410) be provided with first outer buckle (421) complex spacing platform (411).

4. The cell integrated fastening structure according to claim 3, wherein a distance between the stopper table (411) and a fastening point of the first outer clip (421) is equal to thicknesses of the membrane electrode (100), the anode plate (200), and the cathode plate (300).

5. The cell integrated fastening structure according to claim 3, wherein a plurality of the first outer clips (421) are symmetrically provided at edges of the clip frame (410).

6. The cell integrated fastening structure according to claim 3, wherein the connecting portion (430) includes a second outer catch (431) and an inner catch (432) that is fittable with the second outer catch (431);

the second outer buckle (431) is arranged on the lower side of the buckle frame (410) and is positioned among the first outer buckles (421), and the length of the second outer buckle (431) is greater than that of the first outer buckles (421);

the inner buckle (432) is arranged at the top of the buckle frame (410).

7. The cell integrated fastening structure as claimed in claim 6, wherein the number of both the second outer catch (431) and the inner catch (432) is plural.

8. The cell integrated fastening structure according to any one of claims 1 to 7, wherein the through-holes (500) are provided at the corners of the membrane electrode (100), the anode plate (200), and the cathode plate (300).

9. The cell-integrated fastening structure according to claim 8, characterized in that the number of the through-holes (500) is four.

10. A fuel cell characterized by comprising a plurality of single cell integrated fastening structures according to any one of claims 1 to 9.

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