Transfer device, cell structure, and fuel cell stack

Abstract

The utility model provides a transfer printing device, a monocell structure and a fuel cell stack, the transfer printing device is used for transferring a bonding layer on a frame in a membrane electrode, and the transfer printing device comprises a base, a transfer printing head arranged on the base, and a discharging wheel and a receiving wheel which are arranged on the base; the discharging wheel is used for unwinding the adhesive film, the transfer printing head is used for transferring a bonding layer in the adhesive film to the frame, and the collecting wheel is used for winding a protective film in the adhesive film. According to the transfer printing device disclosed by the utility model, the adhesive layer can be transferred on the frame of the membrane electrode through the discharging wheel and the receiving wheel, and the protective membrane can be automatically wound on the receiving wheel, so that the gluing mode is simple, the use amount of the transferred adhesive layer can be easily controlled according to the width of the adhesive membrane, the waste of the adhesive membrane is favorably reduced, and the production cost is reduced. And a good use effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and particularly relates to a transfer device. The utility model also relates to a single cell structure prepared by using the above transfer device. At the same time, the utility model further relates to a fuel cell stack having the above single cell structure. Background Art

[0002] The single cell integrated sealing structure has the advantages of independent power generation and good sealing performance. Compared with the way that the split sealing structure must cooperate with the next component to generate power, this way is more conducive to power expansion.

[0003] Currently, for the single cell integrated sealing, hot melt adhesives are pre-coated on both sides of the frame of the membrane electrode. After assembling the membrane electrode assembly with the anode plate and the cathode plate, heat curing is carried out to form a single cell. Among them, the pre-coating of the hot melt adhesive on the frame adopts a roll-to-roll production method, that is, hot melt adhesives are covered on both sides of the frame. Although this method improves production efficiency, it also causes waste of hot melt adhesives. And the traditional hot melt adhesive coating equipment cannot well meet the use requirements. Therefore, it is very necessary to propose a transfer device for pre-coating the frame of the membrane electrode. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a transfer device, which can transfer the adhesive layer onto the frame of the membrane electrode and is conducive to reducing the waste of the adhesive film.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A transfer device is used for transferring an adhesive layer onto the frame in a membrane electrode. The transfer device includes a base, a transfer head arranged on the base, and a feeding wheel and a winding wheel arranged on the base; the feeding wheel is used for unwinding the adhesive film, the transfer head is used for transferring the adhesive layer in the adhesive film onto the frame, and the winding wheel is used for winding the protective film in the adhesive film.

[0007] Furthermore, the transfer device further includes a guiding part arranged on the base, and the guiding part is used for guiding the adhesive film to pass around the transfer head.

[0008] Furthermore, the guiding part includes a first guiding column and a second guiding column arranged on the base; along the movement path of the adhesive film, the first guiding column is located between the feeding wheel and the transfer head, and the second guiding column is located between the transfer head and the winding wheel.

[0009] Furthermore, the feeding wheel and the winding wheel are connected together through a transmission structure.

[0010] Further, the transmission structure includes a plurality of transmission gears meshed with each other; at least the plurality of transmission gears include a feeding gear coaxially rotating with the feeding wheel and a winding gear coaxially rotating with the winding wheel.

[0011] Compared with the prior art, the present utility model has the following advantages:

[0012] In the transfer device of the present utility model, by providing a feeding wheel and a winding wheel, the structure is simple, and the adhesive layer can be transferred onto the frame of the membrane electrode, while the protective film can be automatically wound onto the winding wheel, making the gluing method simple. Also, according to the width of the glue film, the amount of the transferred adhesive layer can be easily controlled, which is beneficial to reducing the waste of the glue film.

[0013] In addition, the provision of the guiding portion is conducive to guiding the glue film to pass around the transfer head. The guiding portion includes a first guiding post and a second guiding post, which have a simple structure, can guide the movement track of the glue film, and can also play a certain tensioning role on the glue film strip and the protective film strip, so as to better guide the glue film to smoothly transfer the adhesive layer. The feeding gear and the winding gear connected by transmission have a simple structure, are convenient to arrange, and can ensure the reliability of feeding and winding.

[0014] Another object of the present utility model is to provide a single cell structure, including a membrane electrode and a plate electrode connected to the membrane electrode;

[0015] The plate electrode is connected to the frame in the membrane electrode through an adhesive layer, and the adhesive layer is transferred onto the frame through the transfer device as described above; wherein, the adhesive layer transferred onto the frame includes a first adhesive part and a second adhesive part. In the thickness direction of the frame, the first adhesive part has a protrusion protruding above the second adhesive part, and a receiving groove for receiving the protrusion is provided on the plate electrode.

[0016] Further, the adhesive layer includes a plurality of adhesive strips transferred onto the frame, and the plurality of adhesive strips include a first adhesive strip arranged along a first direction of the frame and a second adhesive strip arranged along a second direction of the frame; the first adhesive strip and the second adhesive strip have a connection position where they intersect and overlap, and the parts of the first adhesive strip and the second adhesive strip at the connection position together constitute the first adhesive part, and the parts of the first adhesive strip and the second adhesive strip at other positions both constitute the second adhesive part; wherein, the first direction is orthogonal to the second direction.

[0017] Further, the first adhesive strip and the second adhesive strip are provided with the same width; and / or, each of the adhesive strips is formed by hot melt adhesive transferred onto the frame.

[0018] Further, hydrogen gas through-holes, coolant through-holes, and air through-holes are provided on the frame, and the adhesive strips are provided on at least one side of the hydrogen gas through-holes, at least one side of the coolant through-holes, and at least one side of the air through-holes.

[0019] For the single cell structure of the present utility model, the adhesive layer transferred onto the frame by the above transfer device is connected to the membrane electrode, and the adhesive layer includes a first adhesive portion and a second adhesive portion. This is conducive to achieving a partial adhesive connection between the frame of the membrane electrode and the plate, thus saving the material of the adhesive layer. By using the receiving groove provided on the plate, the flatness after the connection between the frame of the membrane electrode and the plate can be ensured, avoiding local stress concentration, improving the adhesive quality, and ensuring the sealing performance between the membrane electrode and the plate, thereby facilitating the improvement of the preparation quality of the single cell.

[0020] In addition, the adhesive layer includes a plurality of adhesive strips. The plurality of adhesive strips include a first adhesive strip and a second adhesive strip, and the overlapping part of the first adhesive strip and the second adhesive strip forms the first adhesive portion, and the parts of the first adhesive strip and the second adhesive strip at other positions form the second adhesive portion. In this way, not only the material of the adhesive layer can be saved, but also the overlapping part can ensure the adhesive quality and effectively prevent the occurrence of local non-adhesion.

[0021] Secondly, the first adhesive strip and the second adhesive strip are set to be of equal width, which is conducive to using the same transfer device to transfer adhesive strips of the same specification, and is conducive to improving the transfer efficiency. The adhesive strip is made of hot melt adhesive, and each adhesive strip can be pre-transferred onto the frame of the membrane electrode by the existing transfer process, making it easier to process and facilitating high-efficiency mass production.

[0022] In addition, adhesive strips are provided on at least one side of the hydrogen gas through-holes, at least one side of the coolant through-holes, and at least one side of the air through-holes on the frame, which is conducive to better sealing the positions of the hydrogen gas through-holes, coolant through-holes, and air through-holes. Moreover, when adhesive strips are provided circumferentially around the hydrogen gas through-holes, coolant through-holes, and air through-holes, the sealing effect between any two of the positions of the hydrogen gas through-holes, coolant through-holes, and air through-holes can be further improved.

[0023] Another object of the present utility model is to provide a fuel cell stack, in which the single cell structure as described above is provided.

[0024] The fuel cell stack of the present utility model, by adopting the above single-cell structure, is conducive to realizing the local adhesive connection between the frame of the membrane electrode and the plate, thus saving the material used for the adhesive layer. Moreover, the accommodation groove provided on the plate enables the protruding portion to be received in the accommodation groove, which can help ensure the flatness after the connection between the frame of the membrane electrode and the plate, improve the adhesive quality between the frame of the membrane electrode and the plate, and ensure the sealing performance between the membrane electrode and the plate, thereby facilitating the improvement of the performance and quality of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0026] Figure 1 is a schematic structural diagram of the first perspective of the transfer device according to the embodiment of the present utility model;

[0027] Figure 2 is a schematic structural diagram of the second perspective of the transfer device according to the embodiment of the present utility model;

[0028] Figure 3 is a partial structural diagram of the single-cell structure according to the embodiment of the present utility model;

[0029] Figure 4 is Figure 3 an enlarged view of part A in

[0030] DESCRIPTION OF THE REFERENCE NUMERALS:

[0031] 1, frame; 21, first adhesive part; 22, second adhesive part; 211, first adhesive strip; 212, second adhesive strip; 41, unwinding wheel; 42, unwinding gear; 51, winding wheel; 52, winding gear; 6, first guide post; 7, second guide post; 8, adhesive film; 81, adhesive layer; 82, protective film; 9, transfer head;

[0032] 10, hydrogen inlet; 20, hydrogen outlet; 30, coolant inlet; 40, coolant outlet; 50, air inlet; 60, air outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0036] A single cell, that is, a fuel cell monomer, usually includes an anode plate, a cathode plate, and a membrane electrode disposed between the anode plate and the cathode plate in terms of structure. Among them, sealing is one of the key technical difficulties of fuel cells. The sealing function of fuel cells is mainly to prevent the mutual internal leakage of hydrogen, oxygen, and coolant, and at the same time prevent the leakage between hydrogen, oxygen, and coolant and the external environment of the battery.

[0037] In the related art, for a single cell with an integrated sealing structure, during manufacturing, hot melt adhesive is pre-coated on both sides of the frame of the membrane electrode. After assembling the membrane electrode assembly with the anode plate and the cathode plate, heat curing is performed to form a single cell. Among them, the pre-coating of the hot melt adhesive on the frame of the membrane electrode adopts a roll-to-roll production method, that is, hot melt adhesive is covered on both sides of the frame. Although this method improves production efficiency, it also causes waste of hot melt adhesive. Moreover, traditional hot melt adhesive coating equipment cannot well meet the use requirements. Therefore, it is very necessary to propose a transfer device for pre-coating the frame of the membrane electrode.

[0038] Therefore, aiming at the deficiencies existing in the prior art, the present utility model proposes a transfer device for pre-coating the frame of the membrane electrode. The following will refer to the drawings and combine with embodiments to detail the present utility model.

[0039] Embodiment 1

[0040] This embodiment relates to a transfer device that can transfer an adhesive layer onto the frame 1 of the membrane electrode, and it is also easy to control the amount of the transferred layer 81 according to the width of the adhesive film, which is beneficial to reducing the waste of the adhesive film.

[0041] As Figure 1 AndFigure 2 As shown, the transfer device of this embodiment is used to transfer the adhesive layer 81 onto the frame 1 in the membrane electrode. In terms of the overall structure, the transfer device includes a base, a transfer head 9 provided on the base, and a feeding wheel 41 and a winding wheel 51 rotatably provided on the base.

[0042] Among them, the feeding wheel 41 is used to place the adhesive film roll, which is formed by winding the adhesive film 8. The adhesive film 8 includes a protective film 82 and an adhesive layer 81 adhered to one side of the protective film 82. The transfer head 9 is used to transfer the adhesive layer 81 in the adhesive film 8 onto the frame 1, that is, one end of the adhesive film 8 can pass around the transfer head 9 and is connected to the winding wheel 51, and the winding wheel 51 is used to wind the protective film 82.

[0043] By providing the feeding wheel 41 and the winding wheel 51, the structure of the transfer device is simple, which is also conducive to improving the mechanization degree of the transfer of the adhesive layer 81, thus facilitating the improvement of production efficiency. Moreover, the protective film 82 is automatically wound on the winding wheel 51, making the coating method simple. According to the width of the adhesive film 8, it is also easy to control the amount of the printed adhesive layer 81, which is conducive to reducing the waste of hot melt adhesive.

[0044] It should be noted that the base of this embodiment can be set on a manipulator, for example. In this way, by using the manipulator operation, the adhesive layer 81 can be quickly and accurately transferred onto the frame 1 of the membrane electrode, thereby further improving the production efficiency.

[0045] The transfer device of this embodiment further includes a guiding part provided on the base, and this guiding part is used to guide the adhesive film 8 to pass around the transfer head 9, so as to facilitate ensuring the smooth transfer of the adhesive film 8. Specifically, still referring to Figure 1 and Figure 2 As shown, the guiding part specifically includes a first guiding column 6 and a second guiding column 7. Along the movement path of the adhesive film 8, the first guiding column 6 is located between the feeding wheel 41 and the transfer head 9, and the second guiding column 7 is located between the transfer head 9 and the winding wheel 51. This can not only guide the conveyance of the adhesive film 8, but also guide the winding of the protective film 82. Moreover, through the arrangement of the first guiding column 6 and the second guiding column 7, it can also play a certain tensioning role on the adhesive film strip and the protective film strip, so as to better guide the smooth transfer of the adhesive film 8.

[0046] In this embodiment, the feeding wheel 41 and the winding wheel 51 are connected together through a transmission structure. As a feasible implementation manner, the transmission structure includes a plurality of transmission gears meshed with each other. Among them, the plurality of transmission gears at least include a feeding gear 42 that rotates coaxially with the feeding wheel 41 and a winding gear 52 that rotates coaxially with the winding wheel 51. By adopting the transmission structure of gear transmission, its structure is simple, convenient to arrange, and can ensure the reliability of feeding and winding.

[0047] As a preferred embodiment, continue to refer to Figure 1 and Figure 2 As shown, the feeding wheel 41 of this embodiment is fixedly connected to one side of the feeding gear 42, and the winding wheel 51 is fixedly connected to one side of the winding gear 52, and the feeding gear 42 and the winding gear 52 are meshed and connected. In this way, by the meshing connection of the feeding gear 42 and the winding gear 52, the adhesive layer 81 is transferred onto the frame 1 of the membrane electrode, and the peeled protective film 82 is automatically wound on the winding wheel 51. This structure is simple, convenient to arrange, and also helps to ensure that the adhesive layer 81 is successfully transferred onto the frame 1 of the membrane electrode.

[0048] It should be noted here that in addition to being directly meshed and connected, several transmission gears can be arranged between the feeding gear 42 and the winding gear 52, and the feeding gear 42 and the winding gear 52 are respectively meshed and connected with each transmission gear to enable the feeding of the adhesive film 8 by the feeding wheel 41 and the winding of the protective film 82 by the winding gear 52. Such a setting is also possible.

[0049] During specific use, the adhesive film 8 on the feeding wheel 41 sequentially passes around the first guide post 6 and the transfer head 9, and at the position of the transfer head 9, the adhesive layer 81 is transferred onto the frame 1 of the membrane electrode. At this time, the protective film 82 is separated from the adhesive layer 81, and then the protective film 82 continues to pass around the transfer head 9 and the second guide post 7 and is connected to the winding wheel 51, so that the protective film 82 is wound on the winding wheel 51.

[0050] It is worth mentioning that in addition to both the first guide post 6 and the second guide post 7 being provided in the guiding part of this embodiment, only the first guide post 6 or only the second guide post 7 can also be provided. Of course, the guiding part can also adopt a guiding structure such as a guiding sleeve, and this is also feasible.

[0051] The transfer device of this embodiment has a simple structure and can preferably transfer the adhesive layer 81 smoothly onto the frame 1 of the membrane electrode. And according to the width of the adhesive film 8, it is also easy to control the amount of the transferred adhesive layer 81, so as to help reduce the waste of the adhesive film 8 and has a good use effect.

[0052] Embodiment Two

[0053] This embodiment relates to a single cell structure. In terms of the overall composition, in combination with Figure 3 and Figure 4As shown, the single cell structure of this embodiment includes a membrane electrode and a plate electrode connected to the membrane electrode. Among them, the plate electrode is transferred onto the border 1 in the membrane electrode through an adhesive layer 81 by the transfer device of the first embodiment. The adhesive layer 81 transferred onto the border 1 includes a first adhesive part 21 and a second adhesive part 22. And, in the thickness direction of the border 1, the first adhesive part 21 has a protruding part that is higher than the second adhesive part 22. At the same time, a receiving groove for receiving the protruding part is provided on the plate electrode.

[0054] In the above structure, the adhesive layer 81 is transferred onto the border 1 by the transfer device of the first embodiment and the adhesive layer 81 includes the first adhesive part 21 and the second adhesive part 22, which is conducive to realizing the local adhesive connection between the border 1 of the membrane electrode and the plate electrode, without the need to coat hot melt adhesive on the entire surface of the membrane electrode. Thus, it can help save the material of the adhesive layer 81 and is conducive to the preparation of the single cell. At the same time, when the adhesive layer 81 is locally provided on the border 1, due to existing process reasons, there is an overlapping adhesive layer 81 at the connected position of the adhesive layer 81, so that the thickness of the adhesive layer at the overlapping part, that is, the first adhesive part 21, is thicker than the thickness of the second adhesive part 22. In this way, it is easy to cause stress concentration in the area where the adhesive layer is thicker after adhesion, affecting the adhesion quality and further affecting the performance of the single cell.

[0055] At this time, by providing a receiving groove on the plate electrode, it can accommodate the excess adhesive layer, that is, the protruding part that is higher than the second adhesive part 22, in the receiving groove. Thus, it can help ensure the flatness after the connection between the border 1 of the membrane electrode and the plate electrode, avoid local stress concentration, and can improve the adhesion quality between the border 1 of the membrane electrode and the plate electrode, ensuring the sealing performance between the membrane electrode and the plate electrode, thereby being conducive to improving the preparation quality of the single cell.

[0056] Among them, it should be noted that the membrane electrode, that is, the membrane electrode assembly, is a key core component for fuel cell power generation, and its specific structure can refer to the structure in the prior art. That is, the membrane electrode assembly is mainly composed of a proton exchange membrane, a catalyst, a gas diffusion layer, and the border 1 of the membrane electrode. An anode catalyst layer and a cathode catalyst layer are respectively provided on both sides of the proton exchange membrane. The proton exchange membrane and the anode catalyst layer and the cathode catalyst layer on both sides form a catalyst coated membrane. The border 1 of the membrane electrode is wound around the circumferential direction of the catalyst coated membrane. An anode gas diffusion layer is provided outside the anode catalyst layer, and a cathode gas diffusion layer is provided outside the cathode catalyst layer. The edge parts of the anode gas diffusion layer and the cathode gas diffusion layer are respectively lapped on the border 1.

[0057] See Figure 3As shown in the figure, a membrane electrode reaction area is provided in the middle of the frame 1 of the membrane electrode. Hydrogen gas through holes, coolant through holes, and air through holes are respectively provided on both sides of the membrane electrode reaction area. Among them, the hydrogen gas through holes include a hydrogen gas inlet 10 and a hydrogen gas outlet 20, the coolant through holes include a coolant inlet 30 and a coolant outlet 40, and the air through holes include an air inlet 50 and an air outlet 60. Taking Figure 3 the orientation shown, from top to bottom on the left side of the reaction part are the hydrogen gas inlet 10, the coolant outlet 40, and the air outlet 60 in sequence, and from top to bottom on the right side of the reaction part are the air inlet 50, the coolant inlet 30, and the hydrogen gas outlet 20 in sequence.

[0058] The adhesive layer 81 of this embodiment, as Figure 3 shown, includes a plurality of adhesive strips transferred onto the frame 1, and the plurality of adhesive strips include first adhesive strips 211 arranged along a first direction of the frame 1 and second adhesive strips 212 arranged along a second direction of the frame 1. The first adhesive strips 211 and the second adhesive strips 212 have a connection position where they intersect and overlap. The parts of the first adhesive strips 211 and the second adhesive strips 212 at the connection position together form a first adhesive part 21, and the parts of the first adhesive strips 211 and the second adhesive strips 212 at other positions both form a second adhesive part 22. Among them, the first direction is orthogonal to the second direction. With such a setting, not only can the material used for the adhesive layer 81 be saved, but also the intersecting and overlapping parts can ensure the bonding quality and effectively prevent the situation of local non-bonding.

[0059] It should be noted here that the first direction and the second direction can be, for example, the length direction and the width direction of the frame 1 respectively. In addition to being orthogonally arranged, the first direction and the second direction can also be inclined according to actual needs to ensure the seal between the frame 1 and the electrode plate.

[0060] To facilitate a better understanding of the positions of the plurality of adhesive strips set in this embodiment. Preferably, in this embodiment, two first adhesive strips 211 and two second adhesive strips 212 are alternately connected in sequence and surround the circumference of the frame 1 of the membrane electrode to form a rectangular frame. The first adhesive strips 211 and the second adhesive strips 212 located inside the rectangular frame are respectively adjacent to and cooperate with the rectangular frame, and are used to respectively surround the air through holes and the coolant through holes to separate the air through holes and the coolant through holes. During specific implementation, both the first adhesive strips 211 and the second adhesive strips 212 are located at the part where the electrode plate is attached to the frame 1, and can separate the hydrogen gas through holes, the coolant through holes, and the air through holes in pairs.

[0061] In this embodiment, plates are provided on both sides of the frame 1 of the membrane electrode, that is, an anode plate and a cathode plate are respectively provided on both sides of the membrane electrode. The anode plate and the frame 1 of the membrane electrode, as well as the cathode plate and the frame 1 of the membrane electrode, are adhesively connected through an adhesive layer 81, and accommodation grooves are provided on each plate. At this time, by respectively providing accommodation grooves on the cathode plate and the anode plate, the protruding parts on both sides of the membrane electrode are respectively received in the accommodation grooves, thereby improving the flatness after adhesion between the anode plate and the frame 1 of the membrane electrode, and between the cathode plate and the frame 1 of the membrane electrode, preventing stress concentration in areas with excessive hot melt adhesive, improving the adhesion quality, and also being beneficial to improving the preparation quality of the single cell.

[0062] It is worth mentioning that the accommodation groove formed on the plate is specifically provided near the first bonding part 21 so that the protruding part, that is, the excess hot melt adhesive exceeding the thickness of the adhesive layer, can be timely received in the accommodation groove, thereby further avoiding the problems of unevenness at the position of the excess hot melt adhesive or stress concentration after curing.

[0063] In this embodiment, the first bonding strip 211 and the second bonding strip 212 are provided with the same width, which is conducive to using the same transfer device to transfer bonding strips of the same specification, and is beneficial to improving the transfer efficiency. Moreover, in this embodiment, each bonding strip is formed by hot melt adhesive transferred onto the frame 1, so that each bonding strip is pre-transferred onto the frame 1, making it easier to carry out subsequent processing and preparation, and being beneficial to improving the batch production efficiency.

[0064] The single cell structure of this embodiment is conducive to realizing the local adhesive connection between the frame 1 of the membrane electrode and the plate, saving the consumption of hot melt adhesive, and using the accommodation groove provided on the plate to receive the excess hot melt adhesive, thereby being beneficial to ensuring the flatness after the connection between the frame 1 of the membrane electrode and the plate, avoiding local stress concentration, improving the bonding quality between the frame 1 of the membrane electrode and the plate, ensuring the sealing performance between the membrane electrode and the plate, and thus being beneficial to improving the preparation quality of the single cell.

[0065] Embodiment Three

[0066] This embodiment relates to a fuel cell stack, in which the single cell structure of Embodiment Two is provided.

[0067] Specifically, the fuel cell stack includes a plurality of single cells arranged in a stacked manner. In each single cell structure, a membrane electrode is provided between the anode plate and the cathode plate, which are the plates located on both sides. In addition, a sealing strip is provided between two adjacent single cell structures, and the sealing strip is used to seal the coolant channel formed between two adjacent single cell structures.

[0068] Among them, it should be noted that at least one of the multiple single cells adopts the single cell structure described in Embodiment 2. It should also be noted that for the structures not described in the fuel cell stack, the structures in the prior art can be referred to.

[0069] For the fuel cell stack of this embodiment, by adopting the single cell structure of Embodiment 2, it is beneficial to realize the local bonding connection between the frame 1 of the membrane electrode and the plate electrode, which helps to save the material of the bonding layer. And the receiving groove provided on the plate electrode enables the protruding part to be received in the receiving groove, which can help to ensure the flatness after the frame 1 of the membrane electrode and the plate electrode are connected, improve the bonding quality between the membrane electrode and the plate electrode, and ensure the sealing performance between the membrane electrode and the plate electrode, thereby helping to improve the performance and quality of the fuel cell stack.

[0070] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transfer device for transferring an adhesive layer onto a frame (1) in a membrane electrode, characterized in that: The transfer device includes a base, a transfer head (9) provided on the base, and a feeding wheel (41) and a winding wheel (51) provided on the base; The feeding wheel (41) is used for unwinding a glue film (8), the transfer head (9) is used for transferring the adhesive layer (81) in the glue film (8) onto the frame (1), and the winding wheel (51) is used for winding the protective film (82) in the glue film.

2. The transfer device according to claim 1, characterized in that: The transfer device further includes a guiding part provided on the base, and the guiding part is used for guiding the glue film to pass around the transfer head (9).

3. The transfer device according to claim 2, characterized in that: The guiding part includes a first guiding column (6) and a second guiding column (7) provided on the base; Along the movement path of the glue film, the first guiding column (6) is located between the feeding wheel (41) and the transfer head (9), and the second guiding column (7) is located between the transfer head (9) and the winding wheel (51).

4. The transfer device according to any one of claims 1 to 3, characterized in that: The feeding wheel (41) and the winding wheel (51) are connected together by a transmission structure.

5. The transfer device according to claim 4, characterized in that: The transmission structure includes a plurality of transmission gears meshed with each other; The plurality of transmission gears at least include a feeding gear (42) that rotates coaxially with the feeding wheel (41), and a winding gear (52) that rotates coaxially with the winding wheel (51).

6. A single cell structure, characterized in that: It includes a membrane electrode and a plate electrode connected to the membrane electrode; The plate electrode is connected to the frame (1) in the membrane electrode through an adhesive layer (81), and the adhesive layer (81) is transferred onto the frame (1) by the transfer device according to any one of claims 1 to 5; Wherein, the adhesive layer (81) transferred onto the frame (1) includes a first adhesive part (21) and a second adhesive part (22). In the thickness direction of the frame (1), the first adhesive part (21) has a protrusion that protrudes above the second adhesive part (22), and a receiving groove for receiving the protrusion is provided on the plate electrode.

7. The single cell structure according to claim 6, characterized in that: The adhesive layer includes a plurality of adhesive strips transferred onto the frame (1), and the plurality of adhesive strips include a first adhesive strip (211) arranged along a first direction of the frame (1), and a second adhesive strip (212) arranged along a second direction of the frame (1); The first adhesive strip (211) and the second adhesive strip (212) have a connection position where they intersect and overlap, and the portions of the first adhesive strip (211) and the second adhesive strip (212) at the connection position together form the first adhesive portion (21), and the portions of the first adhesive strip (211) and the second adhesive strip (212) at other positions all form the second adhesive portion (22); Wherein, the first direction is orthogonal to the second direction.

8. The single cell structure according to claim 7, wherein: The first adhesive strip (211) and the second adhesive strip (212) are provided with the same width; and / or, Each of the adhesive strips is formed by a hot melt adhesive transferred onto the frame (1).

9. The single cell structure according to claim 7, wherein: The frame (1) is provided with hydrogen through holes, coolant through holes and air through holes, and the adhesive strips are provided on at least one side of the hydrogen through holes, at least one side of the coolant through holes, and at least one side of the air through holes.

10. A fuel cell stack, wherein: The fuel cell stack is provided with the single cell structure according to any one of claims 6-9.

Images