Fuel cell stack and fuel cell

Abstract

The fuel cell stack comprises a stack base and a plurality of single stack modules, the stack base is provided with an opening, a plurality of first positioning structures are configured in the stack base along the opening, and the first positioning structures extend along a first direction and are arranged at intervals along a second direction; wherein the first direction is perpendicular to the plane where the opening is located, the second direction is parallel to the plane where the opening is located, and the first direction is perpendicular to the second direction; the plurality of single stack modules are inserted into the stack base along a first direction and are distributed in parallel along a second direction; at least one side edge of the single-electric-pile module is provided with a second positioning structure corresponding to the first positioning structure, and when the single-electric-pile module is inserted into the electric pile base, the first positioning structure and the second positioning structure are correspondingly matched in a concave-convex mode. And a fuel cell having the same. According to the utility model, the disassembly and assembly convenience of the fuel cell stack is improved, and the disassembly, assembly and maintenance efficiency of the fuel cell can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a fuel cell stack and a fuel cell. Background Art

[0002] Automobile fuel cells are highly efficient power generation devices that convert the chemical energy of fuel into electrical energy directly through electrochemical reactions without burning fuel. Among them, hydrogen fuel cells have the advantages of high fuel energy conversion rate, low noise and zero emissions. They can be widely used in transportation vehicles such as automobiles, airplanes, trains, and fixed power stations, and are strongly supported and developed rapidly.

[0003] However, currently common hydrogen fuel cells are composed of bipolar plates and membrane electrodes stacked alternately. After stacking, they need to be pressed with a press, fastened with straps or long fixing bolts, and finally assembled into the hydrogen fuel cell housing. If they need to be repaired, the stacks need to be completely disassembled, then re-stacked, pressed, fastened and assembled, which is cumbersome to install and difficult to repair. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a fuel cell stack and a fuel cell, which can improve the convenience of disassembly and assembly of the fuel cell stack and effectively improve the efficiency of disassembly, assembly and maintenance of the fuel cell.

[0005] According to one aspect of an embodiment of the present application, a fuel cell stack is provided, including: a stack base, the stack base having an opening, a plurality of first positioning structures arranged inside the stack base along the opening, the first positioning structures extending along a first direction and being arranged at intervals along a second direction; wherein the first direction is perpendicular to the plane where the opening is located, the second direction is parallel to the plane where the opening is located, and the first direction and the second direction are perpendicular to each other; and a plurality of single stack modules, the plurality of single stack modules are inserted into the stack base along the first direction and are distributed in parallel along the second direction; a second positioning structure is arranged on at least one side of the single stack module corresponding to the first positioning structure, and when the single stack module is inserted into the stack base, the first positioning structure and the second positioning structure are matched with each other in a corresponding concave-convex manner.

[0006] In an exemplary embodiment of the present application, the second positioning structure is symmetrically arranged on opposite sides of the single stack module along a third direction; the first positioning structure includes a first sub-slot and a second sub-slot, and the first sub-slot and the second sub-slot are symmetrically arranged along the third direction; wherein the third direction is parallel to the plane where the opening is located, and is perpendicular to the second direction.

[0007] In an exemplary embodiment of the present application, a single stack module includes a first electrode plate, a second electrode plate and a membrane electrode, the first electrode plate is connected to the second electrode plate, and the membrane electrode is arranged between the first electrode plate and the second electrode plate; when the single stack module is inserted into the stack base, the first electrode plate of the single stack module abuts against the second electrode plate of the adjacent single stack module.

[0008] In an exemplary embodiment of the present application, the relative outer plate surfaces of the first electrode plate and the second electrode plate are respectively provided with a third positioning structure and a fourth positioning structure, the third positioning structure and the fourth positioning structure are arranged correspondingly and extend along the first direction; when a single stack module abuts against an adjacent single stack module, the third positioning structure of the single stack module and the fourth positioning structure of the adjacent single stack module are matched with each other in a corresponding concave-convex manner.

[0009] In an exemplary embodiment of the present application, it also includes: a fastener, the side panels of the stack base located at the two ends of the second direction are the first panel and the second panel, the first panel and / or the second panel are provided with through holes passing through the inside and outside of the stack base, and the fastener is configured to be able to pass through the through hole and abut against the single stack module to press several single stack modules.

[0010] In an exemplary embodiment of the present application, the relative outer plate surfaces of the first electrode plate and the second electrode plate are respectively formed with a first heat dissipation channel and a second heat dissipation channel, and the first heat dissipation channel and the second heat dissipation channel are symmetrically arranged; when a single stack module abuts against an adjacent single stack module, the first heat dissipation channel of the single stack module and the second heat dissipation channel of the adjacent single stack module are arranged corresponding to each other.

[0011] In an exemplary embodiment of the present application, the side panels of the fuel cell base located at the two ends of the third direction are the third panel and the fourth panel, and the third panel and / or the fourth panel are provided with a plurality of heat dissipation openings penetrating the inside and outside of the fuel cell base; when a single fuel cell module is inserted into the fuel cell base, the heat dissipation opening is connected to the first heat dissipation channel and / or the second heat dissipation channel.

[0012] In an exemplary embodiment of the present application, it also includes: a battery stack cover plate, which has an open position and a closed position that can be switched relative to the battery stack base. When the battery stack cover plate is in the open position, the battery stack cover plate and the battery stack base are staggered in the first direction or the second direction to open the opening; when the battery stack cover plate is in the closed position, the battery stack cover plate is connected to the battery stack base and the opening is closed.

[0013] In an exemplary embodiment of the present application, a handle is provided on the top of the single stack module.

[0014] According to a second aspect of an embodiment of the present application, a fuel cell is provided, comprising any of the above-mentioned fuel cell stacks.

[0015] The fuel cell stack of the present application cooperates with the first positioning structure of the stack base and the second positioning structure of the single stack module to form a combination relationship similar to a slide groove and a slider. During assembly, the single stack module can be directly inserted into the stack base. In this way, each single stack module can operate independently. During maintenance, the problematic single stack module can be taken out and replaced separately, which is convenient and quick, and will not interfere with other single stack modules. It not only improves the convenience of disassembly and assembly of the fuel cell stack, but also effectively improves the efficiency of disassembly, assembly and maintenance of the fuel cell.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the disassembled structure of a fuel cell stack according to an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of the structure of a single stack module according to an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram of the disassembled structure of a single stack module according to an embodiment of the present application is shown;

[0021] Figure 4 A top view of two adjacent single stack modules after being abutted according to an embodiment of the present application is shown;

[0022] Figure 5 A side view of two adjacent single stack modules after being abutted according to an embodiment of the present application is shown;

[0023] Figure 6 The structure of the fuel cell stack described in the embodiment of the present application is shown Figure 1 ;

[0024] Figure 7 The structure of the fuel cell stack described in the embodiment of the present application is shown Figure 2 .

[0025] Description of Figure Numbers:

[0026] 1-battery stack base, 11-opening, 12-first positioning structure, 121-first sub-slot, 122-second sub-slot, 13-first panel, 14-second panel, 15-third panel, 16-fourth panel,

[0027] 2 / 2'-single stack module, 21-second positioning structure, 22-first electrode plate, 221-third positioning structure, 222-first heat dissipation channel, 23 / 23'-second electrode plate, 231 / 231'-fourth positioning structure, 232 / 232'-second heat dissipation channel, 24-membrane electrode, 25-handle,

[0028] 3-fastener, 4-through hole, 5-heat dissipation port, 6-battery stack cover.

[0029] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0031] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0032] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0033] like Figures 1 to 5As shown, the present embodiment provides a fuel cell stack, including a stack base 1 and a plurality of single stack modules 2, the stack base 1 having an opening 11, an internal cavity being formed inside the stack base 1 along the opening direction of the opening 11, and a plurality of first positioning structures 12 being arranged in the internal cavity, the first positioning structures 12 extending along a first direction S1 and being arranged at intervals along a second direction S2; wherein the first direction S1 is perpendicular to the plane where the opening 11 is located, the second direction S2 is parallel to the plane where the opening 11 is located, and the first direction S1 and the second direction S2 are perpendicular to each other; a plurality of single stack modules 2 are inserted into the stack base 1 along the first direction S1 and are distributed in parallel along the second direction S2; at least one side of the single stack module 2 is provided with a second positioning structure 21 corresponding to the first positioning structure 12, and when the single stack module 2 is inserted into the stack base 1, the first positioning structure 12 and the second positioning structure 21 are correspondingly matched with each other in a concave-convex manner. In this way, the single stack module 2 can be directly inserted into the stack base 1 during assembly, and each single stack module 2 can operate independently. During maintenance, the problematic single stack module 2 can be taken out and replaced separately through the opening 11 without affecting other single stack modules 2. This not only improves the convenience of disassembly and assembly of the fuel cell, but also effectively improves the efficiency of disassembly, assembly and maintenance.

[0034] In some embodiments, Figure 1 and Figure 2 As shown, the second positioning structure 21 is symmetrically arranged on the opposite sides of the single stack module 2 along the third direction S3; the first positioning structure 12 includes a first sub-slot 121 and a second sub-slot 122, and the first sub-slot 121 and the second sub-slot 122 are symmetrically arranged along the third direction S3; wherein the third direction S3 is parallel to the plane where the opening 11 is located, and is perpendicular to the second direction S2. The first sub-slot 121 and the second sub-slot 122 are respectively used to limit the opposite sides of the single stack module 2 located at both ends of the third direction S3, and the first sub-slot 121 and the second sub-slot 122 cooperate with the second positioning structure 21 to position the single stack module 2 and limit the displacement of the single stack module 2 in the second direction S2, so that the single stack module 2 can be conveniently and quickly inserted into the first positioning structure 12 through the opening 11 of the stack base 1, and the operation is convenient and the position is accurate.

[0035] In some embodiments, Figures 1 to 5As shown, the single stack module 2 includes a first electrode plate 22 and a second electrode plate 23 connected to each other, and a membrane electrode 24 arranged between the first electrode plate 22 and the second electrode plate 23; when the single stack module 2 is correspondingly inserted into the stack base 1 along the first direction S1 and distributed in parallel along the second direction S2, the first electrode plate 22 of the single stack module 2 abuts against the second electrode plate 23' of the adjacent single stack module 2', so that each single stack module 2 is both independent of each other and interconnected, which is convenient for collecting the electric energy generated by multiple single stack modules 2 on the one hand, and can connect the fuel flow channels and oxidant flow channels of adjacent single stack modules 2 on the other hand, so as to realize the unified transmission of fuel and oxidant respectively.

[0036] It can be understood that the above-mentioned membrane electrode 24 includes a proton membrane, a catalyst layer and a gas diffusion layer. The reaction gas enters the catalyst layer through the gas diffusion layer, and the catalyst layer catalyzes the exchange of the reaction gas with the proton membrane to generate electrical energy; and the first electrode plate 22 and the second electrode plate 23 are important functional components for distributing reaction gas, conducting electrons and supporting the membrane electrode 24. Among them, the first electrode plate 22 and the second electrode plate 23 are respectively an anode plate and a cathode plate. The anode plate has a fuel flow channel to assist the fuel to be transferred to the anode catalyst. The cathode plate has an oxidant flow channel to assist the oxidant to be transferred to the cathode catalyst. The first electrode plate 22 and the second electrode plate 23 can be connected by screwing, riveting or clamping. For example, in this embodiment, the membrane electrode 24 itself has a supporting structure, and the membrane electrode 24 is clamped between the first electrode plate 22 and the second electrode plate 23. The first electrode plate 22 and the second electrode plate 23 are riveted by passing plastic rivets through the four corners of the first electrode plate 22 and the second electrode plate 23 in turn. The riveted joints do not interfere with the internal reactions of the first electrode plate 22, the second electrode plate 23 and the membrane electrode 24. The single stack module 2 outputs electrical energy through the reaction of the fuel and the oxidant at the cathode and cathode on the membrane electrode 24.

[0037] For example, Figures 1 to 3 As shown, in this embodiment, the first electrode plate 22 is used as the anode plate, and the second electrode plate 23 is used as the cathode plate. The first fuel inlet a1, the first oxidant inlet b1, the first fuel outlet c1 and the first oxidant outlet d1 are respectively reserved on the first electrode plate 22, and the fuel flow channel on the inner plate surface of the first electrode plate 22 is connected to the first fuel inlet a1 and the first fuel outlet c1. The second fuel inlet a2, the second oxidant inlet b2, the second fuel outlet c2 and the second oxidant outlet d2 are respectively reserved on the second electrode plate 23, and the oxidant flow channel on the inner plate surface of the second electrode plate 23 is connected to the second oxidant inlet b2 and the second oxidant outlet d2. After the first electrode plate 22 and the second electrode plate 23 are sandwiched with the membrane electrode 24 to be assembled into a single stack module 2, the fuel and the oxidant flow separately and will not flow in series; at the same time, as Figure 1 , Figure 4 and Figure 5 As shown, when adjacent single stack modules 2 are abutted against each other, the fuel inlet and outlet and the oxidant inlet and outlet of the first electrode plate 22 are connected to the fuel inlet and outlet and the oxidant inlet and outlet of the second electrode plate 23' of the adjacent single stack module 2', and the oxidant inlet and outlet of the first electrode plate 22 are only used as the oxidant transmission channel between the two adjacent single stack modules 2, and do not participate in the reaction of the membrane electrode 24; similarly, the fuel inlet and outlet of the second electrode plate 23' are only used as the fuel transmission channel between the two adjacent single stack modules 2, and do not participate in the reaction of the membrane electrode 24; in this way, the fuel and oxidant can flow in their respective cavities respectively, ensuring the normal operation of the fuel cell stack.

[0038] It can also be understood that when a single stack module is inserted into the stack base, the way in which the first electrode plate of the single stack module abuts the second electrode plate of the adjacent single stack module can be achieved by configuring the width of the first positioning structure 12 and the second positioning structure 21 in the second direction S2 to be smaller than the overall width of the single stack module 2 in the second direction S2 or the width of the portion of the single stack module 2 used to abut against the adjacent single stack module 2'. For example, in the present embodiment, the first positioning structure 12 is a concave portion and the second positioning structure 21 is a convex portion. The second positioning structure 21 can be inserted into the first positioning structure 12 along the first direction S1. When the second positioning structure 21 is concave-convexly matched with the first positioning structure 12, the width of the first positioning structure 12 in the second direction S2 is greater than the width of the second positioning structure 21, but less than the overall width of the single stack module 2 in the second direction S2. Therefore, the single stack module 2 can abut against the adjacent single stack module 2'.

[0039] Furthermore, the fuel inlet and outlet and the oxidant inlet and outlet can be sealed at the outer electrode plate of the last single stack module 2 at the tail end of the fuel cell stack (in this embodiment, the first electrode plate 22 of the single stack module 2), so that the fuel inlet end, the fuel discharge end, the oxidant inlet end and the oxidant discharge end are all located at the head end of the fuel cell stack, that is, the first single stack module 2, to facilitate cluster management.

[0040] Furthermore, seals may be provided between the first electrode plate 22 and the membrane electrode 24 of the single stack module 2, between the membrane electrode 24 and the second electrode plate 23, and / or between the first electrode plate 22 and the second electrode plate 23' of the adjacent single stack module 2' to assist in connection or communication and improve assembly stability.

[0041] In some embodiments, Figure 1 , Figure 2 and Figure 4As shown, the relative outer plate surfaces of the first electrode plate 22 and the second electrode plate 23 are respectively formed with a third positioning structure 221 and a fourth positioning structure 231, and the third positioning structure 221 and the fourth positioning structure 231 are correspondingly arranged and extend along the first direction S1; when the single stack module 2 abuts against the adjacent single stack module 2', the third positioning structure 221 of the single stack module 2 and the fourth positioning structure 231' of the adjacent single stack module 2' are correspondingly matched with each other in a concave-convex manner, thereby ensuring the accurate positioning of the two adjacent single stack modules 2 and improving the connection stability between the two adjacent single stack modules 2.

[0042] It can be understood that since the single stack module 2 needs to be inserted into the stack base 1 along the first direction S1, and two adjacent single stack modules 2 need to abut against each other, the third positioning structure 221 and the fourth positioning structure 231 should respectively correspond to the upper end faces of the electrode plates connected to their respective locations in the first direction S1, or respectively correspond to the upper and lower end faces of the electrode plates penetrating their respective locations in the first direction S1, so that the single stack module 2 can be independently inserted into or removed from the stack base 1 along the first direction S1 to avoid movement interference with adjacent single stack modules 2'.

[0043] It can also be understood that the third positioning structure 221 and the fourth positioning structure 231 are concave-convex matching structures corresponding to each other. Therefore, the third positioning structure 221 can be set on the first pole plate 22, and the corresponding fourth positioning structure 231 can be set on the second pole plate 23; the third positioning structure 221 can also be set on the second pole plate 23, and the corresponding fourth positioning structure 231 can be set on the first pole plate 22. As long as the single stack module is abutted against the adjacent single stack module, the third positioning structure 221 and the fourth positioning structure 231' of the two adjacent single stack modules can be concave-convex matched with each other.

[0044] In some embodiments, Figure 1 and Figure 7 As shown, the fuel cell stack also includes a fastener 3, and the side panels of the stack base 1 located at the two ends of the second direction S2 are the first panel 13 and the second panel 14. The first panel 13 and / or the second panel 14 are provided with a through hole 4 that passes through the inside and outside of the stack base 1. The fastener 3 is configured to be able to pass through the through hole 4 and abut against a single stack module 2 inside the stack base 1, so as to compress several single stack modules 2 and improve the connection stability of the fuel cell stack.

[0045] For example, Figure 1 and Figure 2As shown, in this embodiment, the fastener 3 is a bolt, and the through hole 4 is a screw hole. The bolt is screwed into the screw hole from the outside to the inside to abut against the single stack module 2 inside the stack base 1, so as to compress several single stack modules 2, thereby improving the connection stability of the fuel cell stack, and the tightness between the single stack modules 2 can also be adjusted by controlling the screw-in depth of the bolt.

[0046] Preferably, a plurality of fasteners 3 may be provided, and the plurality of fasteners 3 and the corresponding through holes 4 may be evenly distributed around or at four corners of the first panel 13 and / or the second panel 14 so that the force distribution is even.

[0047] In some embodiments, Figure 1 and Figure 6 As shown, when the single stack module 2 is inserted into the stack base 1, the single stack modules 2 at the head and tail ends of the fuel cell stack are respectively abutted against the first panel 13 and the second panel 14, and corresponding holes are opened on the first panel 13 and / or the second panel 14 according to the required design positions of the fuel inlet end, the fuel outlet end, the oxidant inlet end and the oxidant outlet end to connect the fuel inlet and outlet and the oxidant inlet and outlet of the single stack module 2. In this way, the corresponding positions of the single stack modules 2 at the head and tail ends that do not have holes for external communication are sealed by the first panel 13 and / or the second panel 14, thereby eliminating or reducing the setting of seals at the sealing requirements, saving structural materials.

[0048] For example, Figure 1 and Figure 6 As shown, in this embodiment, corresponding holes can be opened on the first panel 13 to connect the fuel inlet and outlet and the oxidant inlet and outlet of the head end of the fuel cell stack, i.e., the first single stack module 2, while the fuel inlet and outlet and the oxidant inlet and outlet of the outer plate of the tail end of the fuel cell stack, i.e., the last single stack module 2 (in this embodiment, the first plate 22 of the single stack module 2) are sealed by the second panel 14. In this way, the fuel inlet end, the fuel discharge end, the oxidant inlet end and the oxidant discharge end are all integrated on the first panel 13 to facilitate cluster management.

[0049] Of course, a seal can also be set between the single stack module 2 at the head end and the first panel 13 and / or between the single stack module 2 at the tail end and the second panel 14. For example, a seal can be set around the fuel inlet and outlet or the oxidant inlet and outlet, which can also reduce the material used in the seal structure and further improve the assembly stability.

[0050] In some embodiments, Figure 5As shown, the relative outer plate surfaces of the first electrode plate 22 and the second electrode plate 23 are respectively formed with a first heat dissipation channel 222 and a second heat dissipation channel 232, and the first heat dissipation channel 222 and the second heat dissipation channel 232 are symmetrically arranged; when the single stack module 2 is abutted against the adjacent single stack module 2', the first heat dissipation channel 222 of the single stack module 2 and the second heat dissipation channel 232' of the adjacent single stack module 2' are arranged corresponding to each other, thereby forming a channel for the circulation of cooling gas or cooling liquid between the two adjacent single stack modules 2, thereby providing effective heat dissipation for the fuel cell stack.

[0051] Preferably, Figure 2 and Figure 5 As shown, the first heat dissipation channel 222 and the second heat dissipation channel 232 respectively correspond to the end faces of the two end surfaces of the electrode plates where they are located in the third direction S3. Where the third positioning structure 221 and the fourth positioning structure 231 are provided, the first heat dissipation channel 222 and the second heat dissipation channel 232 can also be respectively provided to correspond to the third positioning structure 221 and the fourth positioning structure 231 to improve the heat dissipation efficiency of the fuel cell stack.

[0052] In some embodiments, Figure 1 As shown, the side panels of the stack base 1 respectively located at the two ends of the third direction S3 are the third panel 15 and the fourth panel 16, and the third panel 15 and / or the fourth panel 16 are provided with a plurality of heat dissipation openings 5 ​​penetrating the inside and outside of the stack base 1; when the single stack module 2 is inserted into the first positioning structure 12, the heat dissipation openings 5 ​​are connected with the first heat dissipation channel 222 and / or the second heat dissipation channel 232, so that the inside and outside of the stack base 1 can be quickly connected through the heat dissipation openings 5, which is convenient for the supply of cooling gas or cooling liquid.

[0053] For example, Figure 1 As shown, in this embodiment, the fuel cell stack is cooled and dissipated by air cooling, and a plurality of heat dissipation ports 5 are evenly distributed along the second direction S2 to form a heat dissipation grid to provide effective heat dissipation for the fuel cell stack.

[0054] In some embodiments, Figure 1 and Figure 6 As shown, the fuel cell stack also includes a stack cover plate 6, which has an open position and a closed position that can be switched relative to the stack base 1. When the stack cover plate 6 is in the open position, the stack cover plate 6 and the stack base 1 are staggered in the first direction S1 or the second direction S2 to open the opening 11, and the single stack module 2 inside the stack base 1 can be conveniently operated through the opening; when the stack cover plate 6 is in the closed position, the stack cover plate 6 is connected to the stack base 1 and the opening 11 is closed, cooperating with the stack base 1 to provide protection for the single stack module 2 inside it.

[0055] For example, Figure 1, Figure 6 and Figure 7 As shown, the stack cover plate 6 and the stack base 1 are detachably connected to realize the mutual switching between the open position and the closed position, and the detachable connection method includes but is not limited to screw connection or clamping. In other embodiments, the stack cover plate 6 and the stack base 1 can also realize the mutual switching between the open position and the closed position by setting a slide rail slider for sliding opening and closing, setting a hinge for rotating or flipping opening and closing, etc., which will not be repeated here.

[0056] In some embodiments, Figure 2 , Figure 4 and Figure 5 As shown, a handle 25 is also provided on the top of the single stack module 2, and the handle 25 can be used to conveniently and quickly take and place the single stack module 2.

[0057] For example, Figure 2 and Figure 5 As shown, in this embodiment, the handle 25 is arranged on the top of the second electrode plate 23, so that a gap is left between the handles 25 of two adjacent single stack modules 2, which is convenient for grabbing the handle 25 and then conveniently taking and placing the single stack module.

[0058] In addition, in another embodiment, a fuel cell is provided, including the fuel cell stack in the above embodiment. For other structures and working principles of the fuel cell stack, please refer to the above description of the embodiment of the fuel cell stack. Since the fuel cell stack has the above technical effects, the fuel cell having the fuel cell stack should also have corresponding technical effects, which will not be repeated here.

[0059] It is understood that in this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined. And the description of the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.

[0061] The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradicting each other.

[0062] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A fuel cell stack, characterized in that: include: A stack base, the stack base having an opening, a plurality of first positioning structures arranged inside the stack base along the opening, the first positioning structures extending along a first direction and spaced apart along a second direction; wherein the first direction is perpendicular to the plane where the opening is located, the second direction is parallel to the plane where the opening is located, and the first direction and the second direction are perpendicular to each other; and A plurality of single stack modules are inserted into the stack base along the first direction and are distributed in parallel along the second direction; at least one side of the single stack module is provided with a second positioning structure corresponding to the first positioning structure, and when the single stack module is inserted into the stack base, the first positioning structure and the second positioning structure are matched with each other in a corresponding concave-convex manner.

2. The fuel cell stack according to claim 1, characterized in that: The second positioning structure is symmetrically arranged on opposite sides of the single stack module along a third direction; the first positioning structure includes a first sub-slot and a second sub-slot, and the first sub-slot and the second sub-slot are symmetrically arranged along the third direction; wherein the third direction is parallel to the plane where the opening is located, and is perpendicular to the second direction.

3. The fuel cell stack according to claim 2, characterized in that: The single stack module includes a first electrode plate, a second electrode plate and a membrane electrode, the first electrode plate is connected to the second electrode plate, and the membrane electrode is arranged between the first electrode plate and the second electrode plate; when the single stack module is inserted into the stack base, the first electrode plate of the single stack module abuts against the second electrode plate of the adjacent single stack module.

4. The fuel cell stack according to claim 3, characterized in that: The relative outer plate surfaces of the first electrode plate and the second electrode plate are respectively provided with a third positioning structure and a fourth positioning structure, and the third positioning structure and the fourth positioning structure are arranged correspondingly and extend along the first direction; when the single stack module abuts against the adjacent single stack module, the third positioning structure of the single stack module and the fourth positioning structure of the adjacent single stack module are matched with each other in a corresponding concave-convex manner.

5. The fuel cell stack according to claim 3 or 4, characterized in that: Also includes: The side panels of the stack base located at the two ends of the second direction are the first panel and the second panel, the first panel and / or the second panel are provided with through holes passing through the inside and outside of the stack base, and the fastener is configured to be able to pass through the through holes and abut against the single stack module to press a plurality of the single stack modules.

6. The fuel cell stack according to claim 5, characterized in that: The relative outer plate surfaces of the first electrode plate and the second electrode plate are respectively formed with a first heat dissipation channel and a second heat dissipation channel, and the first heat dissipation channel and the second heat dissipation channel are symmetrically arranged; when the single stack module abuts against the adjacent single stack module, the first heat dissipation channel of the single stack module and the second heat dissipation channel of the adjacent single stack module are arranged corresponding to each other.

7. The fuel cell stack according to claim 6, characterized in that: The side panels of the fuel cell base located at the two ends of the third direction are the third panel and the fourth panel, and the third panel and / or the fourth panel are provided with a plurality of heat dissipation openings penetrating the inside and outside of the fuel cell base; when the single fuel cell module is inserted into the fuel cell base, the heat dissipation openings are connected with the first heat dissipation channel and / or the second heat dissipation channel.

8. The fuel cell stack according to claim 1, characterized in that: Also includes: A stack cover plate, wherein the stack cover plate has an open position and a closed position that can be switched relative to the stack base. When the stack cover plate is in the open position, the stack cover plate and the stack base are staggered in a first direction or a second direction to open the opening; When the stack cover is located at the closed position, the stack cover is connected to the stack base and closes the opening.

9. The fuel cell stack according to claim 1, characterized in that: A handle is provided on the top of the single stack module.

10. A fuel cell, characterized in that: Comprising a fuel cell stack as described in any one of claims 1 to 9.

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