CN113363527A - Fuel cell assembly spacer, fuel cell and fuel cell - Google Patents
Fuel cell assembly spacer, fuel cell and fuel cell Download PDFInfo
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- CN113363527A CN113363527A CN202110572138.9A CN202110572138A CN113363527A CN 113363527 A CN113363527 A CN 113363527A CN 202110572138 A CN202110572138 A CN 202110572138A CN 113363527 A CN113363527 A CN 113363527A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses a fuel cell assembly positioning piece, a fuel cell and a fuel cell, wherein the fuel cell assembly positioning piece comprises a connecting part and a positioning part, the connecting part is suitable for being detachably connected with the fuel cell, a first end and a second end are oppositely arranged on the connecting part in the height direction of the connecting part, a first annular bulge and a second annular bulge are arranged on the periphery of the connecting part and are arranged at intervals in the height direction of the connecting part, an installation groove is defined by the first annular bulge, the second annular bulge and the outer wall surface of the connecting part, the installation groove is suitable for being connected with the fuel cell, a first end and a second end are oppositely arranged on the positioning part in the height direction of the positioning part, and the second end of the positioning part is in contact with the first end of the connecting part. The fuel cell assembly positioning piece provided by the embodiment of the invention can be quickly disassembled and assembled, and the assembly precision between the fuel cell pole plates is improved, so that the assembly precision of the whole cell stack body is improved, and the running performance of the electric stack is ensured.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell assembly positioning piece, a fuel cell single cell and a fuel cell.
Background
The fuel cell is a device for converting chemical energy in hydrogen fuel into electric energy, and has become a hot spot of research in the field of energy sources due to the advantages of low working temperature, no pollution, no corrosion, high energy conversion rate, large specific power, rapid start and the like.
The fuel cell stack is formed by stacking a plurality of unit cells, and hundreds of sections are often stacked to meet the high-power use requirement of the stack. In the automatic assembly process of the galvanic pile, in order to ensure reliable performance and effective sealing of the galvanic pile, the offset between the electrode plates needs to be controlled.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
among the correlation technique, guarantee the precision of piling up through the locating pin that inserts the polar plate locating hole, but because metal polar plate drill way is more sharp, along with the increase of battery festival number, the locating pin can be because be difficult to take out because of frictional force is too big, among the correlation technique, still guarantee the precision of piling up through the limit structure in the polar plate outside, polar plate and outer location structure take place the jamming easily when the battery festival number is more, or among the correlation technique, through the outer frame that has concave-convex structure of mode processing of moulding at the polar plate outside, realize the location through the cooperation of adjacent concave-convex structure, this correlation technique has increased the processing cost height of polar plate, low in production efficiency.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a fuel cell assembly positioning piece, which is convenient to mount and dismount, improves the assembly precision between fuel cell polar plates, further improves the assembly precision of the whole cell stack body, and ensures the running performance of the electric stack.
The embodiment of the invention also provides a single fuel cell.
The embodiment of the invention also provides a fuel cell.
A fuel cell assembly positioning member according to an embodiment of the present invention includes: a connecting portion adapted to be detachably connected to the fuel cell, the connecting portion having a first end and a second end arranged opposite to each other in a height direction thereof; the positioning part is provided with a first end and a second end in the height direction, and the second end of the positioning part is in contact with the first end of the connecting part.
The fuel cell assembly positioning piece provided by the embodiment of the invention is convenient to mount and dismount, improves the assembly precision between the fuel cell polar plates, further improves the assembly precision of the whole cell stack body, and ensures the running performance of the electric stack
In some embodiments, the second end of the connecting portion is provided with a groove extending in a height direction of the connecting portion.
In some embodiments, the connection part is provided at an outer circumference thereof with first and second annular protrusions spaced apart in a height direction of the connection part, the first and second annular protrusions and an outer wall surface of the connection part defining a mounting groove adapted to be connected to the fuel cell.
In some embodiments, the connecting portion includes a plurality of mounting blocks arranged at intervals along a circumferential direction of the connecting portion.
The single fuel cell comprises a plurality of polar plates, wherein a plurality of first positioning holes which are arranged at intervals are arranged on the polar plates, the first positioning holes penetrate through the polar plates along the thickness direction of the polar plates, and the polar plates are arranged at intervals along the thickness direction of the polar plates; the membrane electrode is arranged between the adjacent polar plates, a plurality of second positioning holes which are arranged at intervals are arranged on the membrane electrode, the second positioning holes penetrate through the membrane electrode along the thickness direction of the polar plates, and the second positioning holes correspond to the first positioning holes in the thickness direction of the polar plates; in the fuel cell assembly positioning member according to any one of the above embodiments, a plurality of positioning members are disposed on each of the electrode plates, and the positioning members are disposed on the electrode plates and the membrane electrodes through the first positioning holes and the second positioning holes.
According to the fuel cell single cell disclosed by the embodiment of the invention, the assembly precision of the cell stack body is improved, and the running performance of the cell stack is ensured.
In some embodiments, the connecting portion is disposed in the first positioning hole of the pole plate, and the positioning portion at least partially penetrates through the second positioning hole to be fitted in the groove of the connecting portion of the other pole plate.
In some embodiments, in adjacent pole plates, two of the positioning pieces on each pole plate are arranged diagonally, a projection of a connecting line of the two positioning pieces on one pole plate in a first plane intersects with a projection of a connecting line of the two positioning pieces on the other pole plate in the first plane, and the first plane is parallel to the length direction and the width direction of the pole plate.
A fuel cell according to an embodiment of the present invention includes: the polar plate is provided with a plurality of first positioning holes which are arranged at intervals, and the first positioning holes penetrate through the polar plate along the thickness direction of the polar plate; the membrane electrode is connected with the polar plate, a plurality of second positioning holes which are arranged at intervals are arranged on the membrane electrode, the second positioning holes penetrate through the membrane electrode along the thickness direction of the polar plate, and the second positioning holes correspond to the first positioning holes in the thickness direction of the polar plate; in the fuel cell assembly positioning member according to any one of the above embodiments, the electrode plate is provided with a plurality of positioning members, and the positioning members are inserted into the membrane electrode through the second positioning holes.
According to the fuel cell single cell disclosed by the embodiment of the invention, the assembly precision of the cell stack body is improved, and the running performance of the cell stack is ensured.
A fuel cell according to an embodiment of the present invention includes: a plurality of fuel cell units according to any one of the embodiments described above, the plurality of fuel cell units being stacked in order in the thickness direction of the plates.
According to the fuel cell provided by the embodiment of the invention, the assembly precision of the cell stack body is improved, and the running performance of the electric stack is ensured.
A fuel cell according to an embodiment of the present invention includes: a plurality of fuel battery single cells according to any one of the above embodiments, wherein the plurality of fuel battery single cells are stacked in sequence in the thickness direction of the plate, and the positioning member of one fuel battery single cell is fitted into the groove of the connecting portion of another fuel battery single cell at least partially through the second positioning hole of the fuel battery single cell.
According to the fuel cell provided by the embodiment of the invention, the assembly precision of the cell stack body is improved, and the running performance of the electric stack is ensured.
Drawings
Fig. 1 is an exploded schematic view of a fuel cell unit cell of an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view of the fuel cell unit shown in fig. 1.
Fig. 3 is an exploded schematic view of a fuel cell unit cell according to another embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of the fuel cell unit cell shown in fig. 3.
FIG. 5 is a schematic cross-sectional view of a positioning member according to an embodiment of the invention.
FIG. 6 is a schematic cross-sectional view of a positioning member according to another embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a positioning element according to another embodiment of the invention.
Reference numerals:
the plate 1, the first positioning hole 101,
the film electrode 2, the second positioning hole 201,
the positioning piece 3, the groove 301, the connecting portion 31, the first annular protrusion 311, the second annular protrusion 312, the mounting groove 313, the mounting block 314, and the positioning portion 32.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The fuel cell assembling spacer according to the embodiment of the invention includes the connecting portion and the positioning portion.
The connecting portion is adapted to be detachably connected to the fuel cell, and the connecting portion 31 is arranged with a first end (an upper end of the connecting portion as shown in fig. 5) and a second end (a lower end of the connecting portion as shown in fig. 5) opposite in a height direction thereof (an up-down direction as shown in fig. 5).
The positioning portion 32 is arranged with a first end (an upper end of the positioning portion as shown in fig. 5) and a second end (a lower end of the positioning portion as shown in fig. 5) opposite to each other in a height direction thereof, the second end of the positioning portion being in contact with the first end of the connecting portion.
The positioning portion 32 is provided at the upper end of the connecting portion 31, and the positioning portion 32 and the connecting portion 31 are integrally formed. Specifically, as shown in fig. 1, the connecting portion 31 is detachably disposed in the first positioning hole 101, a groove 301 is disposed at a lower end of the connecting portion 31, and an upper end of the positioning portion 32 of the positioning member 3 on the lower pole plate 1 passes through the second positioning hole 201 and extends into the groove 301 of the connecting portion 31 of the positioning member 3 on the upper pole plate 1.
This application embodiment, through connecting portion 31 and polar plate 1 stable connection, through the cooperation of the location portion 32 and the connecting portion 31 of adjacent setting element 3, can realize direction and location between adjacent polar plate 1 and the membrane electrode 2, improve the assembly precision of polar plate 1.
The fuel cell assembly positioning piece provided by the embodiment of the invention is convenient to mount and dismount, improves the assembly precision between the fuel cell polar plates, further improves the assembly precision of the whole cell stack body, and ensures the running performance of the electric stack
In some embodiments, the second end of the positioning member 3 is provided with a groove 301, and the groove 301 extends along the height direction of the connecting portion.
Specifically, as shown in fig. 2 and fig. 5, a groove 301 is formed at the lower end of the positioning element 3, the groove 301 extends in the up-down direction, and the upper end of the positioning element 3 on the lower electrode plate 1 passes through the second positioning hole 201 on the membrane electrode 2 and extends into the groove 301 of the positioning element 3 on the upper electrode plate 1.
This application embodiment, through set up recess 301 at the lower extreme of setting element 3, when avoiding polar plate 1 assembly, setting element 3 on two adjacent polar plates 1 takes place to interfere, improves the assembly precision between the polar plate 1 to still can be through mutually supporting of recess 301 and setting element 3 upper end, avoided setting element 3 not hard up, improve the stability of being connected between setting element 3 and the polar plate 1, and then improve the stability of whole battery pile body.
In some embodiments, the outer periphery of the positioning portion 32 may further be provided with an external thread or a protruding point, an internal thread and a concave point may be provided in the groove 301 of the connecting portion 31, after the upper end of the positioning portion 32 of one positioning member 3 of two adjacent pole plates 1 extends into the groove 301 of the connecting portion 31 of another positioning member 3, the external thread and the internal thread are connected, so as to improve the friction between two adjacent positioning members 3, thereby improving the stability of connection between two adjacent positioning members 3, or the protruding point on the positioning portion 32 is connected with the concave point in the groove 301 of the connecting portion 31, and also improving the friction between two adjacent positioning members 3.
In some embodiments, the outer profile of the longitudinal cross-section of the groove 301 is trapezoidal.
It should be noted that the outer contour of the longitudinal section of the groove 301 may also be rectangular. Specifically, as shown in fig. 2, the longitudinal sectional area of the groove 301 gradually decreases in the bottom-up direction. The dimension of the groove 301 in the up-down direction is smaller than the dimension of the positioning portion 32 in the up-down direction.
This application embodiment, through setting up recess 301 that longitudinal section area from bottom to top reduces gradually, not only can avoid setting element 3 between two adjacent polar plates 1 to take place to interfere, still can realize location and direction between two adjacent setting element 3, it is more convenient to make the assembly between polar plate 1 and the membrane electrode 2, when recess 301 is less than location portion 32 at the ascending size in upper and lower direction at the size in upper and lower direction, make interval arrangement in upper and lower direction between two adjacent polar plates 1 and the membrane electrode 2, avoid the mutual adhesion of three, improve the stability of battery stack operation.
In some embodiments, the outer profile of the longitudinal section of the positioning portion 32 is trapezoidal.
Specifically, as shown in fig. 1, the longitudinal sectional area of the positioning portion 32 is gradually reduced in the direction from the bottom to the top. The size of the longitudinal section of the middle position of the positioning part 32 in the vertical direction in the left-right direction is larger than the inner diameter of the second positioning hole 201, so that the membrane electrode 2 and the polar plate 1 are arranged at intervals in the vertical direction, the membrane electrode 2 is prevented from contacting the polar plate 1, and the running stability of the battery polar plate 1 is improved.
In some embodiments, the outer profile of the longitudinal section of the positioning portion 32 may also be rectangular.
When the outer contour of the positioning portion 32 in the longitudinal section is rectangular, the outer contour of the groove 301 in the longitudinal section is also rectangular, or when the outer contour of the positioning portion 32 in the longitudinal section is rectangular, the groove 301 is not provided at the lower end of the connecting portion 31.
Specifically, as shown in fig. 4 and 6, the longitudinal sectional area of the positioning portion 32 is constant from top to bottom, and the outer diameter of the positioning portion 32 is equal to the inner diameter of the first positioning hole 101, and is also the same as the inner diameter of the second positioning hole 201.
In some embodiments, the outer periphery of the connection part 31 is provided with a first annular protrusion 311 and a second annular protrusion 312, the first annular protrusion 311 and the second annular protrusion 312 are arranged at intervals in the thickness direction of the plate 1, the first annular protrusion 311, the second annular protrusion 312 and the outer wall surface of the connection part 31 define a mounting groove 313, and the mounting groove 313 is adapted to be connected to the fuel cell.
It should be noted that the distance between the first annular protrusion 311 and the second annular protrusion 312 in the up-down direction is substantially equal to the thickness of the plate 1.
Specifically, as shown in fig. 4 and 5, the inner wall surface of the first positioning hole 101 contacts the outer peripheral surface of the connecting portion 31, the first annular projection 311 is provided at the upper end of the second annular projection 312, the outer diameter of the first annular projection 311 is larger than the outer diameter of the second annular projection 312, the outer diameter of the second annular projection 312 is larger than the inner diameter of the first positioning hole 101, the lower end surface of the first annular projection 311 contacts the upper end surface of the pole plate 1, and the upper end surface of the second annular projection 312 contacts the lower end surface of the pole plate 1.
This application embodiment, through first annular bulge 311, mounting groove 313 is injectd to second annular bulge 312 and connecting portion 31 outer peripheral face, establish setting element 3 card in first locating hole 101 through mounting groove 313, thereby improve the stability of being connected between setting element 3 and polar plate 1, the external diameter through first annular bulge 311 and second annular bulge 312 all is greater than the internal diameter of first locating hole 101, can avoid setting element 3 to drop from first locating hole 101, further improve the stability of being connected between setting element 3 and the polar plate 1.
In some embodiments, the first annular protrusion 311 is integrally formed with the connection portion 31, and the second annular protrusion 312 is integrally formed with the connection portion 31. First annular arch and connecting portion an organic whole and second annular arch and connecting portion an organic whole are formed, can improve setting element bulk strength, improve the joint strength between setting element and the polar plate to improve fuel cell operation's stability.
In some embodiments, the connecting portion 31 includes a plurality of mounting blocks 314, the plurality of mounting blocks 314 being arranged at intervals along a circumference of the connecting portion 31.
Specifically, as shown in fig. 7, the connecting portion 31 is provided below the positioning portion 32, and the connecting portion 31 is formed integrally with the positioning portion 32. The plurality of mounting blocks 314 are arranged at regular intervals in the circumferential direction of the connecting portion, and the second annular projection 312 is divided into a plurality of segments by the plurality of mounting blocks 314. The plurality of mounting blocks 314 are formed integrally with the positioning portion 32.
This application embodiment, through setting up a plurality of installation pieces, improve the elasticity of connecting portion, the installation and the dismantlement of the setting element of being convenient for.
A fuel cell unit according to an embodiment of the present invention includes a plurality of electrode plates 1, a membrane electrode 2, and a fuel cell assembly fixture 3 in the above-described embodiment.
The pole plate is provided with a plurality of first positioning holes 101 arranged at intervals, the first positioning holes 101 penetrate through the pole plate 1 along the thickness direction of the pole plate 1, and the plurality of pole plates 1 are arranged at intervals along the thickness direction (the up-down direction shown in fig. 1).
It should be noted that the outer contour of the pole plate 1 is substantially rectangular, an outer frame is arranged on the outer periphery of the pole plate 1, the first positioning holes 101 are arranged on the outer frame, the pole plate 1 is connected with the outer frame, and the sizes and shapes of the first positioning holes 101 are the same.
Specifically, as shown in fig. 1, four first positioning holes 101 are provided on the plate 1, and the four first positioning holes 101 are respectively provided at four inner corners of the plate 1, where it should be noted that the inner corners of the plate 1 are included angles formed by intersecting the length direction and the width direction of the plate 1. It is understood that the number and the arrangement position of the first positioning holes 101 are not limited to this, and for example, eight first positioning holes 101 may also be provided, four of which are respectively provided at the inner corners of the plate 1, two of which are respectively provided in the length direction of the plate 1, and two of the first positioning holes 101 provided in the length direction of the plate 1 are arranged oppositely in the front-rear direction, two of which are respectively provided in the width direction of the plate 1, and two of the first positioning holes 101 provided in the width direction of the plate 1 are arranged oppositely in the left-right direction.
The membrane electrode 2 is arranged between the adjacent polar plates 1, the membrane electrode 2 is provided with a plurality of second positioning holes 201 which are arranged at intervals, the second positioning holes 201 penetrate through the membrane electrode 2 along the thickness direction of the polar plates 1, and the second positioning holes correspond to the first positioning holes 101 in the thickness direction of the polar plates 1.
It should be noted that the outline of the membrane electrode 2 is substantially rectangular, an outer frame is arranged around the outer periphery of the membrane electrode 2, the second positioning hole 201 is arranged on the outer frame, the membrane electrode 2 is connected with the outer frame, the size of the membrane electrode 2 is the same as that of the electrode plate 1, and the size of the outer frame around the membrane electrode 2 is the same as that of the outer frame around the electrode plate 1. The number of the second positioning holes 201 is the same as the number of the first positioning holes 101.
Specifically, four second positioning holes 201 are formed in the membrane electrode 2, and the four second positioning holes 201 are respectively formed at four inner corners of the membrane electrode 2, where it should be noted that the inner corners of the membrane electrode 2 are included angles formed by intersecting the length direction and the width direction of the membrane electrode 2. The second positioning hole 201 corresponds to the first positioning hole 101 in the up-down direction. It is understood that the number and the disposed position of the second positioning holes 201 are not limited to this, and for example, eight second positioning holes 201 may be provided, four of which are respectively provided at the inner corners of the membrane electrode 2, two of which are respectively provided in the length direction of the membrane electrode 2, and two of the second positioning holes 201 provided in the length direction of the membrane electrode 2 are arranged oppositely in the front-rear direction, two of which are respectively provided in the width direction of the membrane electrode 2, and two of the second positioning holes 201 provided in the width direction of the membrane electrode 2 are arranged oppositely in the left-right direction.
A plurality of positioning pieces 3 are arranged on each polar plate 1, and the positioning pieces 3 penetrate through the polar plates 1 and the membrane electrodes 2 through the first positioning holes 101 and the second positioning holes 201.
It should be noted that the number of the positioning members 3 is the same as that of the first positioning holes 101, the positioning members 3 can be detachably connected to the pole plate 1 by clamping or bolting, and at least part of the positioning members 3 is disposed in the first positioning holes 101.
Specifically, as shown in fig. 1, the number of the positioning members 3 is four, and four positioning members 3 are disposed in the four first positioning holes 101 in a one-to-one correspondence manner, it is understood that the number of the positioning members 3 is not limited thereto.
According to the fuel cell single cell provided by the embodiment of the invention, the positioning piece 3 is detachably connected with the polar plate 1, so that the positioning piece 3 is convenient to mount and dismount, the positioning between the adjacent polar plate 1 and the membrane electrode 2 is realized through the matching of the positioning piece 3 and the positioning hole, the slippage between the membrane electrode 2 and the polar plate 1 is avoided, the assembly precision between the polar plates 1 and the membrane electrode 2 is improved, the assembly precision of the whole cell stack is further improved, and the running performance of the cell stack is ensured.
In some embodiments, the connecting part is arranged in the first positioning hole on the polar plate, and the positioning part at least partially penetrates through the second positioning hole to be matched in the groove of the connecting part on the other polar plate.
In some embodiments, two positioning members 3 of each plate 1 are arranged diagonally, and a projection of a connecting line of the two positioning members 3 of one plate 1 in a first plane, which is parallel to the length direction and the width direction of the plate 1, intersects with a projection of a connecting line of the two positioning members 3 of the other plate 1 in the first plane.
It should be noted that, when the outer profile of the longitudinal section of the positioning portion 32 is rectangular, two positioning members 3 are provided on each electrode plate 1, and the two positioning members 3 are arranged diagonally.
Specifically, as shown in fig. 3 and 4, two positioning pieces 3 are provided on each pole plate 1, the two positioning pieces 3 are arranged diagonally, and the connecting lines of the two positioning pieces 3 on the lower pole plate 1 are intersected with the connecting lines of the two positioning pieces 3 on the upper pole plate 1.
This application embodiment is through setting up two setting elements 3 that are diagonal arrangement, can reduce setting element 3's use, reduce cost, and setting element 3 staggered arrangement on two adjacent polar plates 1 realizes the restraint to polar plate 1 and membrane electrode 2, avoids sliding between adjacent polar plate 1 and the membrane electrode 2.
A fuel cell unit according to an embodiment of the present invention includes a polar plate 1, a membrane electrode 2, and the fuel cell assembly fixture 3 of the above-described embodiment.
The polar plate is provided with a plurality of first positioning holes 101 which are arranged at intervals, and the first positioning holes 101 penetrate through the polar plate along the thickness direction of the polar plate 1.
Note that the electrode plate in this embodiment is a bipolar plate composed of an anode plate and a cathode plate.
The membrane electrode 2 is connected with the polar plate 1, a plurality of second positioning holes 201 which are arranged at intervals are arranged on the membrane electrode 2, the second positioning holes 201 penetrate through the membrane electrode along the thickness direction of the polar plate, and the second positioning holes 201 correspond to the first positioning holes 101 in the thickness direction of the polar plate.
A plurality of positioning members 3 are disposed on the electrode plate 1, and the positioning members 3 are disposed on the membrane electrode 2 through second positioning holes 201.
The other structure and operation of the fuel cell in the present embodiment may be the same as those of the fuel cell in the above-described embodiment, and will not be described in detail here.
According to the fuel cell single cell provided by the embodiment of the invention, the positioning piece 3 is detachably connected with the polar plate 1, so that the positioning piece 3 is convenient to mount and dismount, the positioning between the adjacent polar plate 1 and the membrane electrode 2 is realized through the matching of the positioning piece 3 and the positioning hole, the slippage between the membrane electrode 2 and the polar plate 1 is avoided, the assembly precision between the polar plates 1 and the membrane electrode 2 is improved, the assembly precision of the whole cell stack is further improved, and the running performance of the cell stack is ensured.
The assembly process of the fuel cell unit of the embodiment of the invention is described below with reference to fig. 1, 2, and 5.
The four positioning pieces 3 are correspondingly installed in the first positioning holes 101 of the polar plate 1 one by one, the positioning pieces 3 are stably fixed in the first positioning holes 101 through the first annular protrusions 311 and the second annular protrusions 312 on the connecting portions 31 on the positioning pieces 3, the second positioning holes 201 on the membrane electrodes 2 are connected with the positioning pieces 3, the upper ends of the positioning pieces 3 located below penetrate through the second positioning holes 201 and extend into the grooves 301 of the positioning pieces 3 located above the polar plate 1, therefore, the assembly of the monocells is completed, a plurality of monocells are sequentially stacked from bottom to top, the positioning pieces 3 on the monocells located below in two adjacent monocells are matched with the positioning pieces 3 on the monocells located above, and therefore the assembly of the monocells is achieved.
The assembly process of the fuel cell unit of the embodiment of the invention is described below with reference to fig. 3, 4, and 6.
The two positioning pieces 3 are correspondingly arranged in the first positioning holes 101 of the polar plates 1 one by one, the two positioning pieces 3 are diagonally arranged on the polar plates 1, and a connecting line between the two positioning pieces 3 on the polar plate 1 positioned below and a connecting line between the two positioning pieces 3 on the polar plate 1 positioned above are crossed. And connecting the second positioning hole 201 on the membrane electrode 2 with the positioning part 3 on the polar plate 1 positioned below, and sequentially enabling the upper end of the positioning part 3 positioned below to pass through the second positioning hole 201 and the first positioning hole 101 on the polar plate 1 positioned above from bottom to top, thereby completing the assembly of the single cells.
The other structure and operation of the fuel cell unit cell shown in fig. 3 may be the same as the embodiment shown in fig. 1 and will not be described further herein.
A fuel cell according to an embodiment of the invention includes a plurality of fuel cell cells of the above-described embodiments, which are stacked in order in the thickness direction of the electrode plate.
According to the fuel cell provided by the embodiment of the invention, because the positioning piece provided by the embodiment of the invention is used, the single cells are prevented from sliding, when a plurality of single cells are stacked, the positioning piece 3 ensures the positioning between two adjacent single cells, the assembly precision of the whole cell stack body is improved, and the running performance of the cell stack is ensured.
A fuel cell according to an embodiment of the present invention includes a plurality of fuel cell single cells as in the above-described embodiments, the plurality of fuel cell single cells are stacked in order in the thickness direction of the electrode plate, and the positioning member on one fuel cell is fitted into the groove of the connecting portion on the other fuel cell at least partially through the second positioning hole on the fuel cell single cell.
When a plurality of monocells are stacked, the positioning piece 3 ensures the positioning between two adjacent monocells, the assembly precision of the whole cell stack body is improved, and the running performance of the cell stack is ensured.
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 invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited 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; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A fuel cell assembly spacer, comprising:
a connection portion adapted to be detachably connected to the fuel cell, the connection portion having a first end and a second end arranged opposite to each other in a height direction thereof,
the periphery of the connecting part is provided with a first annular bulge and a second annular bulge, the first annular bulge and the second annular bulge are arranged at intervals in the height direction of the connecting part, the first annular bulge, the second annular bulge and the outer wall surface of the connecting part define a mounting groove, and the mounting groove is suitable for being connected with the fuel cell;
the positioning part is provided with a first end and a second end in the height direction, and the second end of the positioning part is in contact with the first end of the connecting part.
2. The fuel cell mounting spacer according to claim 1, wherein the second end of the connecting portion is provided with a groove extending in a height direction of the connecting portion.
3. The fuel cell assembling spacer according to claim 1, wherein the connecting portion includes a plurality of mounting pieces arranged at intervals in a circumferential direction of the connecting portion.
4. The fuel cell assembly positioning member according to claim 3, wherein the first annular projection and the connecting portion are of an integral structure, and the second annular projection and the connecting portion are of an integral structure.
5. A fuel cell single cell, characterized by comprising:
the polar plates are provided with a plurality of first positioning holes which are arranged at intervals, the first positioning holes penetrate through the polar plates along the thickness direction of the polar plates, and the polar plates are arranged at intervals along the thickness direction of the polar plates;
the membrane electrode is arranged between the adjacent polar plates, a plurality of second positioning holes which are arranged at intervals are arranged on the membrane electrode, the second positioning holes penetrate through the membrane electrode along the thickness direction of the polar plates, and the second positioning holes correspond to the first positioning holes in the thickness direction of the polar plates;
the fuel cell mounting fixture according to any one of claims 1 to 4, wherein a plurality of said fixtures are provided on each of said electrode plates, and said fixtures are inserted through said electrode plates and said membrane electrodes through said first positioning holes and said second positioning holes.
6. The fuel cell unit as claimed in claim 5, wherein the connecting portion is provided in a first positioning hole in the pole plate, and the positioning portion is fitted in a groove of the connecting portion in the other pole plate at least partially through the second positioning hole.
7. The fuel cell unit cell as claimed in claim 5, wherein two of the positioning members of each of the adjacent pole plates are arranged diagonally, and a projection of a line connecting the two positioning members of one of the pole plates on a first plane, which is parallel to the length direction and the width direction of the pole plate, intersects with a projection of a line connecting the two positioning members of the other pole plate on the first plane.
8. A fuel cell single cell, characterized by comprising:
the polar plate is provided with a plurality of first positioning holes which are arranged at intervals, and the first positioning holes penetrate through the polar plate along the thickness direction of the polar plate;
the membrane electrode is connected with the polar plate, a plurality of second positioning holes which are arranged at intervals are arranged on the membrane electrode, the second positioning holes penetrate through the membrane electrode along the thickness direction of the polar plate, and the second positioning holes correspond to the first positioning holes in the thickness direction of the polar plate;
the fuel cell mounting fixture according to any one of claims 1 to 4, wherein a plurality of said fixtures are disposed on said plate, and said fixtures are inserted through said membrane electrode through said second positioning holes.
9. A fuel cell, comprising: a plurality of fuel cell units according to any one of claims 5 to 7, which are stacked in order in the thickness direction of the plates.
10. A fuel cell, comprising: a plurality of fuel cell units according to claim 8, the plurality of fuel cell units being stacked in order in the thickness direction of the plates, and the positioning member on one of the fuel cell units being fitted in the groove of the connecting portion on the other fuel cell unit at least partially through the second positioning hole on that fuel cell unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021104194877 | 2021-04-19 | ||
| CN202110419487 | 2021-04-19 |
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| CN113363527A true CN113363527A (en) | 2021-09-07 |
| CN113363527B CN113363527B (en) | 2022-12-20 |
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| CN202110572138.9A Active CN113363527B (en) | 2021-04-19 | 2021-05-25 | Fuel cell assembly spacer, fuel cell and fuel cell |
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Also Published As
| Publication number | Publication date |
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| CN113363527B (en) | 2022-12-20 |
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