CN217361678U

CN217361678U - Sealing structure and flow battery and electric pile applying same

Info

Publication number: CN217361678U
Application number: CN202221410602.0U
Authority: CN
Inventors: 徐陆澎; 姜宏东; 程子强; 姚鹤
Original assignee: Huantai Energy Storage Technology Co ltd
Current assignee: Huantai Energy Storage Technology Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-02
Anticipated expiration: 2032-05-31

Abstract

The utility model provides a seal structure and flow battery and galvanic pile that are suitable for thereof. The sealing structure is suitable for sealing a first electrode frame, a second electrode frame and a diaphragm or a bipolar plate between the first electrode frame and the second electrode frame which are adjacent in a flow battery or an electric stack formed by the flow battery, and comprises: a plurality of protruding structures located on the first surfaces of the first electrode frame and the second electrode frame; the sealing grooves are respectively positioned on the second surfaces of the first electrode frame and the second electrode frame; and a plurality of gasket rings respectively disposed in the plurality of seal grooves, and at least a portion of the gasket rings contacts the plurality of protrusions, wherein the gasket rings disposed in the seal grooves of the second surface of the second electrode frame contact the separator or the bipolar plate. The utility model discloses a seal structure has solved the problem that prior art galvanic pile sealing material easily drops and the assembly is complicated, and its flow battery and galvanic pile that are suitable for have better leakproofness and stability.

Description

Sealing structure and flow battery and electric pile applying same

Technical Field

The utility model relates to an electrochemistry energy storage field especially relates to a seal structure and redox flow battery and galvanic pile of using thereof.

Background

With the increasingly prominent contradiction between the development of modern economic society and the shortage of traditional energy supplies, people have to find new energy sources such as wind energy, solar energy and the like to meet the production and living requirements. In recent years, with the increase of energy demand, new energy sources such as wind energy and solar energy occupy a larger and larger proportion in energy supply. However, the instability of wind energy and the intermittence of solar energy bring difficulties to the utilization of the energy, so that large-scale energy storage research is imperative.

The flow battery is a reliable and applicable large-scale energy storage technology, and becomes a research and development direction. The flow battery has high safety, long service life, large storage capacity and adjustable power and capacity separation, and can effectively solve the problem of unstable supply of new energy such as wind energy, solar energy and the like.

In order to meet the practical application requirements, the stack of the flow battery is formed by stacking a plurality of single cells in series so as to obtain the required working voltage. The stack structure of the galvanic pile puts high requirements on the sealing performance of the galvanic pile, and the sealing structure commonly used by the galvanic pile has the problems that the sealing material falls off, cannot be reused, the assembly process is complex and the like. Therefore, how to improve the sealing effect of the flow battery and the electric pile is a problem to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a seal structure and flow battery and pile that is suitable for thereof, seal structure be difficult for droing and can reutilization, reach good sealed effect when simplifying assembly process, improved the leakproofness and the stability of its applied flow battery and pile.

In order to solve the technical problem, the utility model provides a seal structure suitable for redox flow battery is suitable for in to redox flow battery or by redox flow battery formation in the pile adjacent first electrode frame, second electrode frame and first electrode frame with diaphragm or bipolar plate between the second electrode frame seal, seal structure includes:

a plurality of protruding structures on first surfaces of the first and second electrode frames;

a plurality of sealing grooves respectively located on the second surfaces of the first electrode frame and the second electrode frame; and

a plurality of gasket rings respectively positioned in the plurality of seal grooves, and at least a portion of the gasket rings being in contact with the plurality of raised structures,

wherein a gasket located in a seal groove in the second surface of the second electrode frame contacts the membrane or the bipolar plate.

In an embodiment of the present invention, the sealing structure comprises an outer sealing structure and an inner sealing structure, wherein,

the outer sealing structure comprises a first outer convex structure and a first outer sealing groove which are respectively positioned on the first surface and the second surface of the first electrode frame, and a second outer convex structure and a second outer sealing groove which are respectively positioned on the first surface and the second surface of the second electrode frame;

the inner sealing structure includes a first inner protrusion structure and a first inner sealing groove on first and second surfaces of the first electrode frame, and a second inner protrusion structure and a second inner sealing groove on first and second surfaces of the second electrode frame,

the first outer sealing groove and the second outer sealing groove are respectively provided with a first outer sealing gasket and a second outer sealing gasket, the first inner sealing groove and the second inner sealing groove are respectively provided with a first inner sealing gasket and a second inner sealing gasket, and the second inner sealing gasket is in contact with the diaphragm or the bipolar plate.

In an embodiment of the present invention, when the second inner gasket is in contact with the bipolar plate, the upper surface of the second outer gasket is higher than the upper surface of the second inner gasket.

In an embodiment of the present invention, a cross section of the plurality of protruding structures in a first direction perpendicular to a plane where the first electrode frame and the second electrode frame are located is an arc, a rectangle, or an inverted trapezoid.

In an embodiment of the present invention, the cross-sections of the sealing grooves and the sealing gaskets in the first direction are rectangular.

In an embodiment of the present invention, a distance between the vertex of the plurality of protruding structures and the first surface of the first electrode frame and the second electrode frame is 0.4 to 0.7 mm.

In an embodiment of the present invention, the thickness of the sealing gaskets is 2.5-3.5 mm.

In an embodiment of the present invention, the shore hardness range of the sealing gaskets is 50 to 70 degrees.

In order to solve the above technical problem, another aspect of the present invention further provides a flow battery, which includes the above-mentioned sealing structure.

The utility model also provides a galvanic pile comprises a plurality of redox flow batteries, including foretell seal structure between every redox flow battery in the galvanic pile and two adjacent redox flow batteries.

Compared with the prior art, the utility model has the advantages of it is following: the sealing structure of the utility model has good sealing performance, prolongs the service life of the flow battery as a whole, and prevents economic loss caused by frequent leakage of electrolyte of the flow battery; the sealing structure of the utility model seals by good extrusion between the convex structure on the electrode frame and the sealing gasket, can bear larger pressure without leakage and seepage; furthermore, the structure of the utility model is light and handy through the matching of the sealing groove and the sealing washer, the assembly process of the galvanic pile can be simplified, and the complex processes such as welding or bonding and the like are not needed between the electrode frame and the flexible bipolar plate; finally, the utility model discloses a seal structure still helps dismantling of galvanic pile, need not to carry out irreversible destructive to the galvanic pile and disassembles.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1a and fig. 1b are schematic structural diagrams of a sealing structure suitable for a flow battery according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a sealing structure for a flow battery according to an embodiment of the present invention for sealing an electrode frame and a bipolar plate; and

fig. 3 is a schematic structural diagram of a sealing structure for a flow battery according to an embodiment of the present invention, for sealing an electrode frame and a separator.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

It will be understood that when an element is referred to as being "on," "connected to," or "in contact with" another element, it can be directly on, connected or coupled to, or in contact with the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly in contact with" another element, there are no intervening elements present.

Fig. 1a and 1b show a sealing structure 10 suitable for a flow battery according to an embodiment of the present invention. The seal structure 10 is adapted to seal adjacent first and second electrode frames and a separator or bipolar plate between the first and second electrode frames in a flow battery or in a stack formed by a flow battery. In order to more clearly illustrate the structural details of the seal 10, no separator or bipolar plate (as will be further described in the specific embodiments below) has been added to fig. 1a and 1b, which schematically illustrate the exploded view and the assembly and contact of adjacent first 11 and second 12 electrode frames. It is understood that in the same flow cell, the first electrode frame 11 and the second electrode frame 12 have a membrane structure, and in a stack formed by stacking flow cells, adjacent flow cells, such as the first flow cell and the second flow cell, have a bipolar plate structure between the second electrode frame of the first flow cell and the first electrode frame of the second flow cell, which means that in the stack, the membrane and bipolar plate structures can be considered to be alternately arranged. Therefore, the seal structure 10 is applicable to both individual flow batteries and stacks of stacked flow batteries. The sealing structure 10 is explained in more detail below with reference to fig. 1a and 1 b.

Referring to fig. 1a and 1b, the seal structure 10 has

boss structures

112 and 122, seal

grooves

110 and 120, and a gasket 121 located in the seal groove 120. It should be noted that, in order to show the characteristics of the sealing structure 10 more clearly, the gasket in the sealing groove 110 is not shown in fig. 1a and 1b, but in different embodiments of the present invention, after the sealing structure 10 is assembled in a flow battery, particularly a stack, the sealing groove 110 also has a gasket therein, for example, the same shape and material as the gasket 121. In addition, only two sealing

grooves

110 and 120 and one sealing gasket 121 located in the sealing groove 120 are exemplarily shown in fig. 1a and 1b, the present invention does not actually limit the number of the sealing grooves, the sealing gaskets, and the protruding structures, and in some other embodiments of the present invention, the number of the structures may be more, which will be described below by way of specific embodiments.

Specifically, in the embodiment shown in fig. 1a and 1b, the protruding

structures

112 and 122 are located on the first surfaces of the first electrode frame 11 and the second electrode frame 12 (in fig. 1a and 1b or may be understood as the lower surfaces of the first electrode frame 11 and the second electrode frame 12), respectively. Correspondingly, the sealing

grooves

110 and 120 are located on the second surfaces of the first electrode frame 11 and the second electrode frame 12 (in fig. 1a and 1b or may be understood as the upper surfaces of the first electrode frame 11 and the second electrode frame 12), respectively. The gasket 121 is located in the sealing groove 120 of the second electrode frame 12, and as can be seen from fig. 1b, after the assembly, the gasket 121 is in contact with the protrusion structure 112 on the first surface of the first electrode frame 11, in practical applications, the first electrode frame 11 and the second electrode frame 12 are in up-and-down assembly contact, and after the assembly, the protrusion structure 112 is in contact with and presses the gasket 121, so that a good sealing effect is formed in the flow battery or the stack.

Further, in the embodiment shown in fig. 1a and 1b, the cross-section of the

protrusion structures

112 and 122 in the first direction X perpendicular to the plane of the first electrode frame 11 and the second electrode frame 12 may be arc-shaped (e.g., semicircular as shown in fig. 1a and 1 b), rectangular, or inverted trapezoidal. Preferably, in the embodiment of the present invention including fig. 1a and 1b, each protruding structure is integrally formed with the corresponding electrode frame, for example, as can be clearly seen in fig. 1a, the protruding structure 112 is integrally formed with the first electrode frame 11, and the protruding structure 122 is also integrally formed with the second electrode frame 12. In addition, the distance between the vertex of the protruding

structures

112 and 122 and the first surface (lower surface) of the first electrode frame 11 and the second electrode frame 12 is between 0.4mm and 0.7 mm. Preferably, as best seen in FIGS. 1a and 1b, the number of raised

structures

112 and 122 is two each (or in other embodiments, the number of raised structures may be more), wherein the spacing between two raised structures 112 is between 1.5 mm and 2.5mm, and the spacing between two raised structures 122 is also within this range. Through the size limitation and the configuration of the protruding structure, the overall effect of the assembled flow battery and the assembled electric pile can not be influenced on the basis of ensuring the sealing effect.

On this basis, in the embodiment shown in fig. 1, the seal groove 120 and the seal gasket 121 have a rectangular cross section in the first direction X direction. It is understood that the sealing groove 110 and the gasket to be inserted therein may have a rectangular cross section in the first direction X. On this basis, in various embodiments of the present invention, as is clear from fig. 1a, in an unassembled natural state, the upper surface of the gasket 121 should be slightly higher than the second surface (upper surface) of the second electrode frame 12, and for example, the portion of the upper surface of the gasket 121 higher than the upper surface of the second electrode frame 12 may be 10% -20% of the groove depth of the sealing groove 120. On the other hand, the sealing groove 120 should be slightly wider than the width of the gasket 121 when not assembled, and the portion of the sealing groove 120 that is wider than the gasket 121 may be 10% to 15% of the width of the gasket 21, and for example, the width of the sealing groove 120 is preferably 8 to 12 mm. In addition, in different embodiments of the present invention, the compression ratio of each gasket is preferably 10% -30%. The sealing washer can be made of fluororubber or ethylene propylene diene monomer. In various embodiments of the present invention, the shore hardness of the gasket is 50-70 degrees. By setting the size, shape, material, and hardness of the gasket 121, the sealing groove 120 can be filled when the gasket 121 is pressed after assembly, thereby achieving a perfect sealing effect.

In the embodiment of the present invention including fig. 1a and 1b, if the sealing structure 10 is applied to a flow battery or a stack, the gasket 121 located in the sealing groove 120 of the second surface of the second electrode frame 12 may also contact the membrane or the bipolar plate. Further explanation will be made with reference to fig. 2 and 3, wherein fig. 2 shows an embodiment in contact with the bipolar plate 20, while fig. 3 shows an embodiment in contact with the separator 30, and the same reference numerals are used for the same parts as in the sealing structure 10 of fig. 1. In such an embodiment, the sealing structure on the side remote from the bipolar plate 20 or the membrane 30 is referred to as the outer sealing structure 21, while the sealing structure acting directly on the side of the bipolar plate 20 or the membrane 30 is referred to as the inner sealing structure 22, which is illustrated in fig. 2 and 3, respectively, using dashed arrows. As described above, the present invention does not limit the number of the sealing grooves, the gasket, and the protrusion structures, and in the embodiment shown in fig. 2 and 3, the sealing grooves and the gasket are respectively provided in the number of 2 on the same surface (for example, the same upper surface and the same lower surface) of the first electrode frame 11 and the second electrode frame 12. Meanwhile, the same surface of the first electrode frame 11 and the second electrode frame 12 has a number of 2 projection structures in the outer sealing structure 21 or the inner sealing structure 22.

Referring to fig. 2 and 3, in particular, the outer sealing structure 21 includes a first outer convex structure 1121 and a first outer sealing groove 1101 respectively located on a first surface (lower surface) and a second surface (upper surface) of the first electrode frame 11, and a second outer convex structure 1221 and a second outer sealing groove 1201 respectively located on a first surface (lower surface) and a second surface (upper surface) of the second electrode frame 12. The inner sealing structure 22 includes a first inner protrusion structure 1122 and a first inner sealing groove 1102 at a first surface (lower surface) and a second surface (upper surface) of the first electrode frame 11, and a second inner protrusion structure 1222 and a second inner sealing groove 1202 at a first surface (lower surface) and a second surface (upper surface) of the second electrode frame 12. Wherein the first outer seal groove 1101 and the second outer seal groove 1201 have a first outer seal gasket (not shown in fig. 2 and 3) and a second outer seal gasket 1211, respectively, the first inner seal groove 1102 and the second inner seal groove 1202 have a first inner seal gasket (not shown in fig. 2 and 3) and a second inner seal gasket 1212, respectively, and the second inner seal gasket 1212 directly contacts the diaphragm 30 or the bipolar plate 20.

Generally speaking, the sealing structure 10 proposed by the present invention with reference to fig. 1 has a good sealing effect by contacting and pressing the raised structure 112 and the gasket 121, but when there is a bipolar plate 20 or a diaphragm 30 between the raised structure and the gasket, in order to prevent the whole sealing effect from being affected after the local sealing failure, the present invention further proposes a mode of combining the outer sealing structure 21 and the inner sealing structure 22 as shown in fig. 2 and fig. 3, so that even if the inner sealing structure 22 directly contacting the bipolar plate 20 and the diaphragm 30 fails, the outer sealing structure 21 can continue to maintain the sealing, thereby increasing the "double insurance" for the sealing of the flow battery, and the sealing effect is better and more stable.

It should be noted that in the embodiment shown in fig. 2, unlike the membrane 30, the bipolar plate 20 has a certain thickness, so as not to affect the assembled effect, the upper surface of the second outer gasket 1211, which is in contact with the bipolar plate 20, is higher than the upper surface of the second inner gasket 1212, and the height difference is to better accommodate the thickness of the bipolar plate 20. It will be appreciated from fig. 2 that, to ensure such a height difference, the groove depth of second inner seal groove 1202 may be set deeper than the groove depth of second outer seal groove 1201, thereby creating such a height difference after assembling

seal rings

1211 and 1212 of the same size. However, the present invention is not limited thereto, and for example, the

gasket

1211 and 1212 may be formed in different sizes to generate a height difference so as to accommodate the bipolar plate.

It will be appreciated that in the embodiment shown in fig. 2 and 3, a seal structure 10 as shown in fig. 1 is applied, and in order to better understand the embodiment shown in fig. 2 and 3, an exemplary description is given below of the seal structure 10 shown in fig. 2 and 3, particularly, the size, structural materials, and the like thereof.

In the embodiment shown in fig. 2 and 3, a second outer gasket 1211 and a second inner gasket 1212 of epdm with shore hardness of 55A may be used. The height (i.e., the distance from the vertex to the surface of the electrode frame) of each of the

projection structures

1121, 1122, 1221, and 1222 is 0.5 mm. The first surfaces (lower surfaces) of the first electrode frame 11 and the second electrode frame 12 in the outer sealing structure 21 have two convex structures, which are spaced by 2mm, and the same features are also applied to the inner sealing structure 22. A second outer gasket 1211 and a second inner gasket 1212, having a thickness of 2.6mm, are fitted in the second outer seal groove 1201 and the second inner seal groove 1202, respectively. When not assembled, the upper surface of the second outer gasket 1211 is 0.4mm above the upper surface of the second outer seal groove 1201. The second outer seal groove 1201 and the second inner seal groove 1202 have groove widths of 11mm, and the second outer gasket 1211 and the second inner gasket 1212 have widths of 10 mm. Specifically, in the embodiment shown in fig. 2, the bipolar plate 20 has a thickness of 0.8mm, and the height difference between the upper surfaces of the second outer gasket 1211 and the second inner gasket 1212 is 0.8 mm. The compression ratio of the second outer gasket 1211 and the second inner gasket 1212 shown in fig. 2 and 3 is 15%, and the side sealing and the stack outer leakage sealing of the bipolar plate 20 or the separator 30 between the first electrode frame 11 and the second electrode frame 12 are respectively achieved.

The utility model discloses an on the other hand has still provided a flow battery, and flow battery includes foretell seal structure. In the flow battery, a diaphragm is arranged between two electrode frames (a first electrode frame and a second electrode frame), and particularly referring to the embodiment of fig. 3, the flow battery adopts such a sealing structure, and the internal sealing of the flow battery can be well realized.

Finally, the utility model also provides a galvanic pile comprises a plurality of flow battery, wherein, all has foretell seal structure between every flow battery in the galvanic pile and two adjacent flow battery. This means that in the stack, the sealing structures described above are used to seal between adjacent flow cells and inside each flow cell, and specific reference may be made to the embodiments shown in fig. 2 and fig. 3, which will not be described herein again.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such alterations, modifications, and improvements are intended to be suggested herein and are intended to be within the spirit and scope of the exemplary embodiments of this application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single disclosed embodiment.

Where numerals describing the number of components, attributes or the like are used in some embodiments, it is to be understood that such numerals used in the description of the embodiments are modified in some instances by the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit-preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

Although the present application has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the foregoing embodiments are merely illustrative of the present application and that various changes and substitutions of equivalents may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above-described embodiments that come within the spirit of the application fall within the scope of the claims of the application.

Claims

1. A sealing structure suitable for use in a flow battery adapted to seal adjacent first and second electrode frames and a separator or bipolar plate between the first and second electrode frames in a flow battery or in a stack formed by a flow battery, the sealing structure comprising:

2. The seal structure of claim 1, wherein the seal structure comprises an outer seal structure and an inner seal structure, wherein,

3. The seal structure of claim 2, wherein an upper surface of the second outer gasket is higher than an upper surface of the second inner gasket when the second inner gasket is in contact with the bipolar plate.

4. The sealing structure of claim 1, wherein a cross-section of the plurality of projection structures in a first direction perpendicular to a plane in which the first electrode frame and the second electrode frame are positioned is arc-shaped, rectangular, or inverted trapezoidal.

5. The seal structure of claim 4, wherein the plurality of seal grooves and the plurality of gasket beads are rectangular in cross-section in the first direction.

6. The sealing structure of claim 1, wherein a distance between the apexes of the plurality of raised structures and the first surface of the first electrode frame and the second electrode frame is 0.4 to 0.7 mm.

7. The seal structure of claim 1, wherein the gasket has a thickness of 2.5 to 3.5 mm.

8. The seal structure of any one of claims 1 to 7, wherein the plurality of gasket beads have a Shore hardness in the range of 50 to 70 degrees.

9. A flow battery, characterized in that the flow battery comprises a sealing structure according to any one of claims 1 to 8.

10. A galvanic stack composed of a plurality of flow batteries, characterized in that each flow battery in the galvanic stack and two adjacent flow batteries comprise a sealing structure according to any one of claims 1-8.