CN114388854B - Fuel cell potential detection structure and fuel cell - Google Patents
Fuel cell potential detection structure and fuel cell Download PDFInfo
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- CN114388854B CN114388854B CN202011140764.2A CN202011140764A CN114388854B CN 114388854 B CN114388854 B CN 114388854B CN 202011140764 A CN202011140764 A CN 202011140764A CN 114388854 B CN114388854 B CN 114388854B
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- 238000001514 detection method Methods 0.000 title claims abstract description 67
- 239000000446 fuel Substances 0.000 title claims abstract description 49
- 125000006850 spacer group Chemical group 0.000 claims description 25
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 21
- 239000012528 membrane Substances 0.000 description 29
- 238000010586 diagram Methods 0.000 description 10
- 238000003825 pressing Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- 239000004698 Polyethylene Substances 0.000 description 1
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
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Classifications
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04567—Voltage of auxiliary devices, e.g. batteries, capacitors
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The application relates to the technical field of new energy, in particular to a fuel cell potential detection structure and a fuel cell, wherein the detection structure comprises: the middle piece is arranged between the two adjacent electrode plates; and at least one detection piece, wherein the detection piece is carried on the intermediate piece between the two electrode plates, and when the electrode plates are stacked with the intermediate piece, the detection piece is contacted with the electrode plates, so that the detection piece is electrically conducted with the electrode plates to carry out potential detection. According to the method, the detection piece is carried on the middle piece located on the electrode plate, when the multi-layer electrode plate group pile is overlapped, the contact between the detection piece and the electrode plate can be directly realized through the group pile, the influence of the potential detection structure on the assembly process is avoided, the stacking difficulty is reduced, and the stacking efficiency is improved.
Description
Technical Field
The application relates to the technical field of new energy, in particular to a fuel cell potential detection structure and a fuel cell.
Background
At present, the fuel cell stack needs to monitor the running state of each single cell, so that an interface with plug connection is generally led out on the surface or in the middle of each bipolar plate, and the interface needs to be in close contact with each bipolar plate so as to achieve the purpose of accurately measuring the potential.
In the prior art, the interface form is provided with two modes of directly sticking the metal elastic sheet on the surface of the polar plate and directly inserting the needle-shaped conductive piece into the reserved hole of the welded bipolar plate.
For the structural form that the metal elastic sheet is directly adhered to the surface of the polar plate, a conductive interface is adhered to each bipolar plate before stacking, so that the stacking procedure of the fuel cell stack is increased, and meanwhile, the consistency is difficult to maintain because the rubberizing process needs manual operation.
In the structural mode that the needle-shaped conductive piece is directly inserted into a reserved hole of the welded bipolar plate, if the needle-shaped conductive piece is inserted before the pressing pile, the needle-shaped conductive piece is easy to fall off in the pressing pile process because of no special fastening design; if the plug is inserted after the press stack, the plug is inserted one by one to cause misplug and misplug easily, and meanwhile, the efficiency is lower, the plug pin is designed into a flat cable mode, and the standard flat cable plug mode is difficult to be made due to holes on the bipolar plate, so that looseness or loose contact is easily caused.
Therefore, how to solve the influence of the potential detection structure in the existing fuel cell on the stack efficiency of the stack becomes a direction of efforts of those skilled in the art.
Disclosure of Invention
The application provides a fuel cell potential detection structure and fuel cell, aim at solving the influence of potential detection structure to the pile efficiency of cell stack in the current fuel cell, this application is through carrying on the middleware that is located the electrode plate with the detecting piece, when multilayer electrode plate stacks stack, can directly add the contact that realizes detecting piece and electrode plate through the group stack, avoid the potential detection structure to the influence that the equipment process caused, reduced the pile degree of difficulty and improved pile efficiency.
In a first aspect, the present application provides a fuel cell potential detection structure, the detection structure comprising:
the middle piece is arranged between the two adjacent electrode plates; and
and the detection piece is mounted on the intermediate piece between the two electrode plates, and when the electrode plates are stacked with the intermediate piece, the detection piece is contacted with the electrode plates, so that the detection piece is electrically conducted with the electrode plates to carry out potential detection.
In a first possible embodiment of the present application, the intermediate member is an insulating spacer or a membrane electrode assembly.
In a second possible embodiment of the present application, the intermediate piece is a membrane electrode assembly, the membrane electrode assembly comprising:
a membrane electrode; and
the first frame encapsulates the membrane electrode edge, and the detection piece is loaded on the first frame.
In a third possible implementation manner of the present application, the intermediate piece is an insulating spacer, and the insulating spacer includes:
a lateral edge; and
the vertical edge and the transverse edge form a rectangular frame, the vertical edge is provided with a first groove, and the detection piece is embedded into the first groove.
In a fourth possible implementation manner of the present application, the junction between the transverse edge and the vertical edge is provided with a positioning hole.
In a fifth possible implementation manner of the present application, the junction between the transverse edge and the vertical edge is further provided with a positioning column, and the positioning column and the positioning hole are respectively diagonally arranged on the insulating spacer.
In a sixth possible implementation manner of the present application, according to the first aspect of the present application, the detecting element includes:
the fixing part is fixed on the middle piece; and
and the detection part is positioned below the middleware.
In a seventh possible implementation manner of the present application, the detection unit includes:
a first abutting portion;
a second abutting portion; and
and the bulge part is positioned between the first abutting part and the second abutting part, the first abutting part and the second abutting part are in contact with the intermediate piece, and when the electrode plates are stacked with the intermediate piece, the bulge part is in contact with the electrode plates.
In an eighth possible implementation manner of the present application, in combination with the first aspect of the present application, the detecting element further includes:
the wiring part, the fixing part and the detection part are sequentially connected to form the detection piece.
In a second aspect, the present application provides a fuel cell comprising a fuel cell potential detection structure as described in the first aspect of the present application.
According to the method, the detection piece is carried on the middle piece located on the electrode plate, when the multi-layer electrode plate group pile is overlapped, the contact between the detection piece and the electrode plate can be directly realized through the group pile, the influence of the potential detection structure on the assembly process is avoided, the group pile difficulty is reduced, the group pile efficiency is improved, meanwhile, the group pile process can be completed under the operation of equipment, manual operation is not needed, and automation is easier to realize.
Meanwhile, the detection piece can be fixed during injection molding of the insulating gasket, and then the potential detection structure and the insulating gasket processing procedure are combined into one procedure, so that the fuel cell processing and manufacturing procedures are reduced, and the working hour cost is reduced. In addition, the detection piece and the electrode plate are pressed by the pile pressing force, poor contact mode is easy to exist between the bipolar plates for inserting the inserting needle, complete contact can be guaranteed by the pile pressing force, and reliability is better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a fuel cell potential detecting structure and an electrode plate according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another structure of a fuel cell potential detecting structure and an electrode plate according to an embodiment of the present disclosure;
fig. 3 is a schematic structural view of a detection member provided in an embodiment of the present application and mounted on a membrane electrode;
fig. 4 is a schematic structural diagram of a detection member provided in the embodiment of the present application mounted on an insulating spacer;
FIG. 5 is a schematic view of an insulating spacer according to an embodiment of the present disclosure;
FIG. 6 is an enlarged partial schematic view of A in FIG. 4;
fig. 7 is a schematic structural diagram of a detecting member according to an embodiment of the present application.
The device comprises a first electrode plate, a second electrode plate, a middle piece 3, a membrane electrode assembly 31, a membrane electrode 311, a first frame 312, an insulating gasket 32, a vertical edge 321, a positioning hole 3211, a positioning column 3212, a first groove 3213, a transverse edge 322, a detection piece 4, a fixing part 41, a detection part 42, a first abutting part 421, a protruding part 422, a second abutting part 423 and a wiring part 43.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides a fuel cell potential detection structure and a fuel cell, and the details are described below.
First, referring to fig. 1, fig. 1 shows a schematic structural diagram of a fuel cell potential detecting structure in an embodiment of the present application. The potential detecting structure may include:
the middle piece 3 is arranged between two adjacent electrode plates, and the middle piece 3 is used for being arranged between two adjacent electrode plates;
electrode plates refer to components of a fuel cell that provide an electrochemical reaction site for an oxidation-reduction reaction to occur and conduct electricity. Specifically, the electrode plates may be anode plates, cathode plates or bipolar plates, and the two electrode plates may correspond to the first electrode plate 1 and the second electrode plate 2, for example, the first electrode plate 1 may be an anode plate, the second electrode plate 2 may be a cathode plate, and the two electrode plates form bipolar plates, for example, the first electrode plate 1 and the second electrode plate 2 may be bipolar plates. In some embodiments of the present application, the electrode plate may be a metal plate, such as a copper conductive plate or the like. In other embodiments of the present application, the electrode plate may be a non-metallic plate, such as a conductive graphite plate or the like.
The intermediate member 3 is a member located between two electrode plates so that the detection member 4 is mounted on the intermediate member 3 and then the electrode plates are subjected to potential detection. Specifically, the intermediate member 3 may be an insulating gasket 32, a membrane electrode assembly 31, a sealing member (e.g., a sealing gasket) or the like disposed between the first electrode plate 1 and the second electrode plate 2, for example, referring to fig. 1, the intermediate member 3 is the insulating gasket 32 disposed between the first electrode plate 1 and the second electrode plate 2, wherein the detecting member 4 is mounted on the insulating gasket 32; for another example, referring to fig. 2, fig. 2 shows a schematic structural diagram of a fuel cell potential detecting structure in an embodiment of the present application, where the intermediate member 3 is a membrane electrode assembly 31 disposed between the first electrode plate 1 and the second electrode plate 2, and the detecting member 4 is mounted on the membrane electrode assembly 31.
At least one detecting piece 4, detecting piece 4 is carried on intermediate piece 3 between two electrode plates, when the electrode plates are piled up with intermediate piece 3, detecting piece 4 is contacted with the electrode plates to make detecting piece 4 electrically conduct the electrode plates and carry out the potential detection.
The detecting element 4 is a conductive object for detecting the electrode plate potential. By way of example, the detecting element 4 may be a sheet-like, cylindrical or other shaped metal object. In some embodiments of the present application, the detecting member 4 may be mounted on the intermediate member 3 by means of connection, for example, by means of screws, pins, snaps, etc. to lock the detecting member 4 on the intermediate member 3. In other embodiments of the present application, the detecting element 4 may be carried on the intermediate element 3 in a pre-processing manner, for example, the detecting element 4 is fixed on the intermediate element 3 in advance in an injection molding manner, the detecting element 4 is fixed on the intermediate element in advance in a processing manner, and the detecting interface can be electrically conducted in a stacking manner by directly overlapping the electrode plate with the intermediate element 3, so that an assembling procedure of potential detection in a stacking process of a cell stack is reduced, and stacking difficulty is further reduced and stacking efficiency is improved.
When the fuel cell stack with the potential detection structure is assembled, as the detection piece 4 is carried on the middle piece 3, in the process of pressing the fuel cell stack, gravity or the locking force of the fuel cell end plate can directly press the first electrode plate 1 and the second electrode plate 2 against the middle piece 3, so that the detected interface is directly contacted with the first electrode plate 1 or the second electrode plate 2, and other electrode plates of the fuel cell stack can realize the purpose of electrically conducting the detection interface in a mode that the electrode plates clamp the detection piece 4 on the middle piece 3, finally, the automatic contact of the detection interface can be realized by directly assembling the electrode plates and the middle piece 3, and the influence of the increase of the potential detection structure assembly procedure on the stack efficiency of the cell stack is avoided.
It should be noted that the above description about the structure of detecting the electric potential of the fuel cell is only an example, and those skilled in the art may also modify the above components in equivalent variations, for example, the detecting members 4 may be provided in plurality and respectively disposed on the intermediate member 3, so as to implement electric potential detection on different positions of the same electrode plate; for example, the detecting members 4 may be provided on both side surfaces of the intermediate member 3, respectively, so as to detect the electric potentials of the first electrode plate 1 and the second electrode plate 2 at the same time; for another example, the insulating spacer 32 may be directly combined with the membrane electrode assembly 31 as the intermediate member 3.
With continued reference to fig. 3, fig. 3 is a schematic structural diagram of the membrane electrode assembly 31 according to an embodiment of the present application. The membrane electrode assembly 31 may include:
a membrane electrode 311;
the membrane electrode 311 takes charge of multiphase material transport (including liquid water, hydrogen, oxygen, proton transport, etc.) within the fuel cell and separates the hydrogen into protons and electrons, wherein the protons pass through the membrane motor to the other side for electrochemical reaction, and the electrons that cannot pass through the proton exchange membrane form current to generate electric energy. Specifically, the membrane electrode 311 may include a proton exchange membrane, a diffusion layer, a catalyst layer, and the like.
The first frame 312, the first frame 312 surrounds the membrane electrode 311, and the detection element 4 is mounted on the first frame 312.
The first frame 312 is mainly used for ensuring insulation between the membrane electrode 311 and the electrode plate, and specifically, the first frame 312 may surround the periphery of the membrane electrode 311, and may also be located around the upper surface or the lower surface of the membrane electrode 311. For example, the first frame 312 may be made of plastic material, insulating material, non-conductive material, such as silica gel, polyethylene, polystyrene, etc., to ensure insulation between the membrane electrode 311 and the electrode plate.
As shown in fig. 3, the conductive member may be mounted on the first frame 312, and when the membrane electrode assembly 31 is clamped between the first electrode plate 1 and the second electrode plate 2, the conductive member contacts with the first electrode plate 1 or the second electrode plate 2, so as to achieve the purpose of accurately measuring the electric potential of the electrode plates. For example, the detecting element 4 may be mounted on the first frame 312 by means of connection, for example, by means of screws, pins, snaps, or the like, to lock the detecting element 4 on the first frame 312. In other embodiments of the present application, the detecting element 4 may be mounted on the first frame 312 by a pre-processing method, for example, the detecting element 4 may be fixed on the first frame 312 in advance by injection molding.
It should be noted that the above description about the structure of detecting the electric potential of the fuel cell is only an example, and those skilled in the art may also modify the above components with equivalent changes, for example, the membrane electrode 311 may be configured in other shapes (such as a hexagon), and for example, the detecting members 4 may also be respectively disposed on the first frames 312 on two sides of the membrane electrode 311, so as to detect the electric potential of the electrode plates on two sides of the membrane electrode 311 at the same time.
With continued reference to fig. 4, fig. 4 is a schematic structural diagram of the detecting member 4 mounted on the insulating spacer 32 according to the embodiment of the present application. Specifically, the insulating spacer 32 may include:
a lateral edge 322;
the transverse edge 322 is mainly used for sealing the edge of the transverse edge 322 of the electrode plate and ensuring the insulation between the first electrode plate 1 and the second electrode plate 2, and illustratively, through holes can be formed on the transverse edge 322 so as to facilitate the assembly of the insulating gaskets 32 during stacking.
The vertical side 321, the vertical side 321 and the lateral side 322 form a rectangular frame, and the detecting member 4 is mounted on the vertical side 321.
The vertical edge 321 is mainly used for sealing the edge of the vertical edge 321 of the electrode plate and ensuring the insulativity between the first electrode plate 1 and the second electrode plate 2, and the vertical edge 321 and the transverse edge 322 form a rectangular frame to form a stable quadrilateral structure, wherein the detection piece 4 is mounted on the vertical edge 321. In some embodiments of the present application, the detecting member 4 may be mounted on the vertical side 321 by means of connection, for example, by means of screws, pins, snaps, etc. to lock the detecting member 4 on the intermediate member 3. In other embodiments of the present application, the detecting member 4 may be mounted on the vertical side 321 by a pre-processing method, for example, by fixing the detecting member 4 on the vertical side 321 member in advance by injection molding.
In order to facilitate stacking of fuel cells, referring to fig. 5, fig. 5 shows a schematic structural diagram of an insulating spacer 32 in the embodiment of the present application, a positioning hole 3211 is formed at the junction between a transverse edge 322 and a vertical edge 321, and when stacking a fuel cell stack, the positioning hole may cooperate with a protruding structure (for example, a positioning post 3212) of an adjacent insulating spacer 32, so that the speed of the fuel cell stack may be increased by means of the positioning hole 3212 provided on the insulating spacer 32 in advance. Furthermore, a positioning post 3212 may be further disposed at the junction between the lateral edge 322 and the vertical edge 321, and the positioning post 3212 and the positioning hole 3211 are disposed on the insulating spacer 32 diagonally, i.e. the insulating spacer 32 includes both the positioning hole 3211 and the positioning post 3212, so that adjacent insulating spacers 32 may be combined and positioned with each other, and the reliability of the combined insulating spacers 32 is enhanced.
In order to ensure flatness when stacking the insulating spacer 32 with the first electrode plate 1 and the second electrode plate 2, in some embodiments, referring to fig. 6, fig. 6 shows a partial enlarged view of a in fig. 4 of the present application, a first groove 3213 is provided on a vertical edge 321, and the detecting element 4 is embedded in the first groove 3213, so that flatness of the electrode plates stacked in multiple layers can be ensured when assembling the cell stack.
It is noted that the above description of insulating spacer 32 is merely exemplary, and those skilled in the art may make modifications to insulating spacer 32 with equivalent variations, for example, insulating spacer 32 may be arranged in a regular polygonal (e.g., regular hexagonal) configuration; for another example, the first grooves 3213 may be provided on the upper and lower surfaces of the insulating spacer 32, and the detecting pieces 4 fitted into the first grooves 3213 may be provided on the upper and lower surfaces of the insulating spacer 32; for another example, insulating spacers 32 may be mounted on lateral sides 322.
With continued reference to fig. 7, fig. 7 is a schematic structural diagram of the detecting member 4 according to the embodiment of the present application. Specifically, the detecting member 4 may include:
a fixing portion 41, the fixing portion 41 being fixed to the intermediate member 3;
in order to ensure that the detecting element 4 can be stably fixed to the intermediate element 3, the fixing portion 41 of the detecting element 4 may be fixed to the intermediate element 3 (for example, the vertical edge 321) during the manufacturing process (for example, during injection molding) of the intermediate element 3. Illustratively, the shape of the fixing portion 41 may be consistent with other portions of the detecting member 4 to facilitate the manufacture of the detecting member 4, for example, referring to fig. 7, the cross-sectional shape of the fixing portion 41 is consistent with the cross-sectional shape of the wire connection portion 43.
And a detection part 42, wherein the detection part 42 is positioned below the intermediate piece 3.
In order to ensure that the detecting element 4 can make contact with the first electrode plate 1 and the second electrode plate 2, the detecting portion 42 of the detecting element 4 may be located on a side of the intermediate member 3 facing the electrode plates, for example, the detecting portion 42 may be disposed below the intermediate member 3 so as to make sufficient contact with the first electrode plate 1. For example, the detecting portion 42 may include a first abutting portion 421, a second abutting portion 423, and a protruding portion 422, where the protruding portion 422 is located between the first abutting portion 421 and the second abutting portion 423, the first abutting portion 421 and the second abutting portion 423 are in contact with the intermediate member 3, when the electrode plates are stacked with the intermediate member 3, the protruding portion 422 is in contact with the electrode plates, and in the detecting process, the first abutting portion 421 and the second abutting portion 423 abut against the intermediate member 3, so that the protruding portion 422 is in elastic contact with the first electrode plate 1 or the second electrode plate 2, so as to ensure that the detecting portion 42 is electrically connected with the electrode plates sufficiently, and avoid a poor contact phenomenon between the detecting member 4 and the electrode plates. In some embodiments, the detecting portion 42 may be embedded in the first groove 3213, for example, the protruding portion 422 is embedded in the first groove 3213, so as to facilitate elastic electrical conduction between the electrode plate and the intermediate member 3, and ensure flat contact between the electrode plate and the intermediate member 3 after stacking.
The wiring portion 43, the fixing portion 41, and the detecting portion 42 are sequentially connected to constitute the detecting piece 4.
In order to facilitate the connection between the detecting member 4 and the detecting means in the detection of the electric potential of the fuel cell stack, the detecting member 4 may be further provided with a wiring portion 43, and the wiring portion 43 may be of any shape that facilitates the wiring, for example, may be provided in the form of a CVM interface. Specifically, the wiring portion 43, the fixing portion 41 and the detecting portion 42 are sequentially connected to form the detecting member 4, so that the front end of the detecting member 4 contacts with the electrode plate, the middle portion of the detecting member 4 is fixed on the intermediate member 3, and the rear end of the detecting member 4 is connected with the wiring to form an integral structure.
It is noted that the above description of the structure of the detecting element 4 is only exemplary, and that a person skilled in the art may make equivalent variants of the above, for example, the detecting portion 42 may be of other forms (cap, hemispherical, etc.).
In order to better implement the potential detecting structure in the embodiment of the present application, a fuel cell is further provided in the embodiment of the present application, and the fuel cell includes the potential detecting structure of the fuel cell in any one of the embodiments.
It should be noted that in order to simplify the presentation disclosed herein and thereby aid in understanding one or more application embodiments, various features are sometimes incorporated into one embodiment, the drawings, or the description thereof, in the foregoing description of embodiments of the application. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the subject application. Indeed, less than all of the features of a single embodiment disclosed above.
Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.
The foregoing has described in detail a fuel cell potential detection structure and a fuel cell provided in the embodiments of the present application, and specific examples have been applied herein to illustrate the principles and embodiments of the present invention, and the above description of the embodiments is only for aiding in understanding the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.
Claims (7)
1. A fuel cell potential detecting structure, characterized by comprising:
the middle piece is arranged between the two adjacent electrode plates; and
at least one detecting member mounted on the intermediate member between the two electrode plates;
the middle piece is provided with a first groove, the detection piece comprises a fixing part and a detection part, the fixing part is fixed on the middle piece, and the detection part is positioned in the first groove;
the detection part comprises a first abutting part, a second abutting part and a protruding part, the protruding part is positioned between the first abutting part and the second abutting part, and the first abutting part and the second abutting part are in contact with the intermediate piece;
the middle piece is an insulating gasket, the fixing part is fixed on the middle piece in the injection molding process of the middle piece, and when the electrode plates are stacked with the middle piece, the protruding part is in contact with the electrode plates, so that the detection piece is electrically conducted with the electrode plates to detect electric potential.
2. The fuel cell potential detecting structure according to claim 1, wherein the insulating spacer comprises:
a lateral edge; and
the vertical edge and the transverse edge form a rectangular frame, the first groove is formed in the vertical edge, and the detection piece is embedded into the first groove.
3. A fuel cell potential detecting structure according to claim 2, wherein a positioning hole is provided at the junction of the lateral side and the vertical side.
4. A fuel cell potential detecting structure according to claim 3, wherein a positioning column is further provided at the junction of the lateral side and the vertical side, and the positioning column and the positioning hole are disposed on the insulating spacer diagonally, respectively.
5. A fuel cell potential detecting structure according to any one of claims 1 to 4, wherein,
the detection portion is located below the intermediate piece.
6. The fuel cell potential detecting structure according to claim 5, wherein the detecting member further comprises:
and the wiring part, the fixing part and the detection part are sequentially connected to form the detection piece.
7. A fuel cell comprising the fuel cell potential detecting structure according to any one of claims 1 to 6.
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| CN202011140764.2A CN114388854B (en) | 2020-10-22 | 2020-10-22 | Fuel cell potential detection structure and fuel cell |
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| GB2506927A (en) * | 2012-10-15 | 2014-04-16 | Intelligent Energy Ltd | Cell voltage monitoring connector system for a fuel cell stack |
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| JP2005122911A (en) * | 2003-10-14 | 2005-05-12 | Nissan Motor Co Ltd | Cell voltage detection terminal device for fuel cell |
| CN1828986A (en) * | 2005-03-04 | 2006-09-06 | 比亚迪股份有限公司 | Membrane electrode and single fuel cell and fuel cell pack including the same |
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| CN114388854A (en) | 2022-04-22 |
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