Sealing gasket and flow battery

Abstract

The utility model relates to a sealing gasket and a flow battery. The sealing gasket is applied to sealing of an adapter and a reactor core in a flow battery, and comprises a main body which is annular and comprises a first end face in the axial direction; the positioning protrusion is arranged on the first end face in a protruding mode, the positioning protrusion is of an annular structure and arranged around the axis of the body, and the positioning protrusion is configured to be capable of being matched with a matching groove in the end face of the adapter in an inserted mode; the first end face is provided with at least one first groove, and the first groove surrounds the peripheral side of the positioning protrusion. The sealing gasket and the flow battery provided by the utility model are relatively good in sealing performance, relatively long in service life and relatively high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of flow battery sealing technology, and in particular to a sealing gasket and a flow battery. Background Technology

[0002] Flow batteries are a new type of rechargeable battery with advantages such as high safety, long lifespan, large storage capacity, adjustable power and capacity, and clean and environmentally friendly operation. They can ensure stable output from renewable energy sources such as wind and solar power after storage and adjustment, enabling large-scale power management, grid assistance, and voltage control. In a flow battery, one side of the core has an end plate with an adapter structure connected to it. This adapter structure connects to external pipes, etc. When the end plate is connected to the core, the liquid inlet of the adapter structure is connected to the liquid flow port of the core. Additionally, a sealing ring is sandwiched between the opposite end faces of the adapter structure and the core to seal the connection. However, after a period of use, especially under conditions of constantly changing temperature and pressure, the sealing performance of these sealing rings is prone to deterioration, which reduces the lifespan and reliability of the flow battery. Utility Model Content

[0003] Therefore, it is necessary to provide a sealing gasket and flow battery with better sealing performance, longer life and higher reliability.

[0004] The first aspect of this application provides a sealing gasket for sealing adapters and core components in a flow battery. The sealing gasket includes:

[0005] The main body, having a ring-shaped structure, includes a first end face along the axial direction; and

[0006] A positioning protrusion is provided on the first end face. The positioning protrusion is ring-shaped and arranged around the axis of the main body. The positioning protrusion is configured to be able to be inserted into the mating groove of the adapter end face.

[0007] The first end face has at least one first groove, which surrounds the outer periphery of the positioning protrusion.

[0008] In one embodiment, the number of first grooves is at least two, and the at least two first grooves are arranged radially spaced along the body, with the first groove located on the innermost radial side of the body having a distance from the positioning protrusion.

[0009] In one embodiment, the first end face is located in a plane perpendicular to the axis of the body;

[0010] The depth of each first groove gradually decreases from the inside to the outside along the radial direction of the main body; and / or

[0011] The width of each first groove gradually decreases from the inside to the outside along the radial direction of the main body; and / or

[0012] The cross-sectional area of ​​each first groove gradually decreases from the inside to the outside along the radial direction of the main body.

[0013] In one embodiment, when the depth of each first groove gradually decreases from the inside to the outside along the radial direction of the body, the depth of the first groove located on the radially outer side of an adjacent first groove is 0.8-0.9 times the depth of the first groove located on the radially inner side.

[0014] When the width of each first groove gradually decreases from the inside to the outside along the radial direction of the main body, the width of the first groove located on the outer side of the radial direction is 0.8-0.9 times that of the first groove located on the inner side of the radial direction.

[0015] When the cross-sectional area of ​​each first groove gradually decreases from the inside to the outside along the radial direction of the main body, the cross-sectional area of ​​the first groove located on the outer radial side is 0.8-0.9 times that of the first groove located on the inner radial side.

[0016] In one embodiment, at least one of the inner and outer peripheral surfaces of the positioning protrusion is provided with an elastic protrusion.

[0017] In one embodiment, elastic protrusions are provided on both the inner and outer peripheral surfaces of the positioning protrusion, and the elastic protrusions on the inner peripheral surface and the elastic protrusions on the outer peripheral surface are positioned to correspond to each other.

[0018] In one embodiment, the body further includes a second end face, which is arranged opposite to the first end face along the axial direction of the body;

[0019] At least one second groove is provided on the second end face, and the second groove is arranged around the axis of the main body.

[0020] In one embodiment, the projections of each first groove and the second groove on the first end face coincide.

[0021] A second aspect of this application provides a flow battery, including an adapter, a core, and the aforementioned sealing gasket, wherein the end face of the adapter facing the core is provided with a mating groove;

[0022] The sealing gasket is sandwiched between the core and the adapter, and the positioning protrusion is inserted into the mating groove; both the adapter and the core include flow holes, and the flow holes of the adapter, the inner annular surface of the sealing gasket, and the flow holes of the core together define a flow channel.

[0023] In one embodiment, the flow battery further includes an end plate, an adapter is mounted on the end plate, the end plate is connected to the core, and the end of the adapter is provided with a connecting flange.

[0024] The end plate has a countersunk hole structure on the surface facing the core. The connecting flange is pressed against the bottom wall of the countersunk hole structure, and the gasket is pressed against the end face of the connecting flange.

[0025] The beneficial effects of the aforementioned sealing gasket and flow battery are as follows:

[0026] By setting a positioning protrusion configured to engage with the mating groove on the adapter end face, relative positioning of the gasket and the adapter can be achieved. Since the positioning protrusion protrudes from the first end face, and at least one first groove is formed on the first end face, the first groove surrounds the outer periphery of the positioning protrusion. The portion of the first groove along the radial direction of the main body also forms a continuous annular structure around the axial direction of the main body. When the main body is subjected to axial pressure, this continuous annular structure, i.e., the portion of the main body located on both sides of the width direction of the first groove, will compress along the axial direction of the main body and partially deform inwards towards the first groove. The resulting elastic pressure causes the portion of the first groove along the radial direction of the main body to press firmly against the end face of the adapter. Compared with sealing rings of related technologies, by locally increasing the elastic pressure, the sealing performance of the gasket is improved. Even under varying pressure and temperature conditions of the flow battery, the enhanced sealing performance of the gasket makes it less prone to failure even if aging occurs to some extent. This also improves the performance and lifespan of the flow battery. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the sealing gasket provided in the embodiments of this application;

[0028] Figure 2 A top view of the sealing gasket provided in an embodiment of this application;

[0029] Figure 3 for Figure 2 A sectional view along AA;

[0030] Figure 4 A schematic diagram illustrating the interaction between the sealing gasket, the core, and the adapter provided in the embodiments of this application;

[0031] Figure 5 for Figure 4 A cross-sectional view along BB;

[0032] Figure 6 for Figure 4 A schematic diagram of the decomposed structure;

[0033] Figure 7 for Figure 6 A sectional view along CC.

[0034] Explanation of icon numbers:

[0035] 100. Sealing gasket;

[0036] 10. Main body; 11. First end face; 111. First groove; 112. Continuous annular structure; 12. Second end face;

[0037] 20. Positioning protrusion; 21. Elastic protrusion;

[0038] 30. Flow channel;

[0039] 50. End plate; 51. Countersunk hole structure; 52. Bolt;

[0040] 60. Adapter; 61. Mating groove; 62. Connecting flange;

[0041] 80. Reactor core;

[0042] 200. Flow battery;

[0043] O, the axis of the main body. Detailed Implementation

[0044] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0050] The sealing gasket and flow battery of this application embodiment are described below with reference to the accompanying drawings.

[0051] Figure 1 This is a schematic diagram of the structure of the sealing gasket provided in the embodiments of this application; Figure 2 A top view of the sealing gasket provided in an embodiment of this application; Figure 3 for Figure 2 A sectional view along AA; Figure 4 A schematic diagram illustrating the interaction between the sealing gasket, the core, and the adapter provided in the embodiments of this application; Figure 5 for Figure 4 A cross-sectional view along BB; Figure 6 for Figure 4 A schematic diagram of the decomposed structure; Figure 7 for Figure 6 A sectional view along CC.

[0052] Reference Figure 1 , Figure 2 , Figure 3 , Figure 7 The sealing gasket 100 provided in this application embodiment is used to seal the adapter 60 and the core 80 in a flow battery. The sealing gasket 100 includes a body 10 and a positioning protrusion 20.

[0053] The main body 10 is annular in shape and includes a first end face 11 along the axial direction. A positioning protrusion 20 protrudes from the first end face 11. The positioning protrusion 20 is annular in shape and arranged around the axis O of the main body 10. The positioning protrusion 20 is configured to be able to be inserted into the mating groove 61 of the end face of the adapter 60.

[0054] The first end face 11 has at least one first groove 111, which surrounds the outer periphery of the positioning protrusion 20.

[0055] By setting a positioning protrusion 20, which is configured to engage with the mating groove 61 on the end face of the adapter 60, the relative positioning of the sealing gasket 100 and the adapter 60 can be achieved. Since the positioning protrusion 20 protrudes from the first end face 11, and at least one first groove 111 is provided on the first end face 11, the first groove 111 surrounds the outer periphery of the positioning protrusion 20. The portion of the first groove 111 along the radial sides of the main body 10 is also formed as a continuous annular structure 112 around the axial direction of the main body 10. When the main body 10 is subjected to axial pressure, the continuous annular structure 112, that is, the portion of the main body 10 located on both sides of the width direction of the first groove 111, will be compressed along the axial direction of the main body 10 and partially deformed towards the inner side of the first groove 111. The resulting elastic pressure causes the portion of the first groove 111 along the radial sides of the main body 10 to press against the end face of the adapter 60. Compared with the sealing ring of related technologies, the sealing performance of the sealing gasket 100 is improved by locally increasing the elastic pressure. Even in scenarios where the pressure, temperature and other conditions of the flow battery change, the sealing performance of the sealing gasket 100 is enhanced. Even if aging occurs to a certain extent, it is less likely to fail and has higher sealing reliability. This also improves the performance and life of the flow battery.

[0056] Specifically, when the sealing gasket 100 of this application and the sealing ring of the related technology are installed between the adapter 60 and the core 80, the sealing gasket 100 of this application can elastically deform to a large extent along the axial direction on both sides of the first groove 111, and can also partially move into the first groove 111. Thus, under the installation condition that the spacing between the adapter 60 and the core 80 is the same, the thickness of the sealing gasket 100 along the axial direction of the main body 10 can be set to be thicker than that of the sealing ring of the related technology. In other words, when the thickness of the compressed sealing gasket 100 of this application and the compressed sealing ring of the related technology are equal in the installed state, the thickness of the sealing gasket 100 of this application at the position of the continuous annular structure 112 in the free state is thicker, and the elastic resistance force generated is greater, so the sealing performance is better.

[0057] In addition, by changing the size of the first groove 111, the magnitude of the elastic resistance can be changed. Thus, appropriate sealing materials and the size of the first groove 111 can be selected according to the working environment and usage requirements of the flow battery. For example, for areas with high stress concentration, the sealing performance can be adjusted by changing the size of the first groove 111. This can effectively avoid the aging and failure of the sealing gasket 100 in areas with high stress.

[0058] It should be noted that "ring-shaped" refers to a closed ring shape, such as a square ring, an irregular ring, or a circular ring. In this embodiment, a circular ring is used as an example for illustration. The same applies to other forms of rings, which will not be described in detail here.

[0059] Furthermore, the main body 10 may include a first end face 11 and a second end face 12 disposed opposite to each other along the axial direction. The first end face 11 may be an annular surface, and the second end face 12 may also be an annular surface.

[0060] The cross-sectional shape of the positioning protrusion 20 can be, for example, square. The positioning protrusion 20 can be inserted into the mating groove 61, for example, the positioning protrusion 20 can be snapped into the mating groove 61. The first groove 111 surrounds the outer periphery of the positioning protrusion 20. For example, the extension direction of the first groove 111 can be annular, and the first groove 111 can be located radially outside the positioning protrusion 20.

[0061] In this embodiment, the number of first grooves 111 is at least two, and the at least two first grooves 111 are arranged radially spaced along the main body 10. The first groove 111 located on the innermost radial side of the main body 10 is spaced from the positioning protrusion 20. In specific implementation, the positioning protrusion 20 and each first groove 111 can be arranged concentrically around the axis O of the main body 10.

[0062] With at least two first grooves 111 arranged radially spaced along the main body 10, the portions of each first groove 111 on both sides of the main body 10's first end face 11, i.e., the continuous annular structure 112, can elastically abut against the end face of the adapter 60. This elastic abutment is achieved over a relatively large radial range along the main body 10, and the elastic abutment force is distributed over a wider area, resulting in a better sealing effect. Furthermore, compared to a main body 10 without first grooves 111, where the entire first end face 11 of the main body 10 is in contact with the end face of the adapter 60, the contact area is smaller, which can also prevent wear and deformation of the sealing gasket 100 to a certain extent, extending the service life of the sealing gasket 100.

[0063] The first groove 111 located on the innermost radial side of the main body 10 is spaced from the positioning protrusion 20. Compared with no space, this reduces the possibility of the positioning protrusion 20 breaking off relative to the first end face 11 and improves the lifespan of the sealing gasket 100.

[0064] In this embodiment, the number of first grooves 111 is described as three. The number of first grooves 111 can also be set to other numbers according to actual needs. The same applies to other cases where the number of first grooves 111 is different, and will not be repeated here. Furthermore, the material of the sealing gasket 100 can be selected from sealing materials suitable for the operating environment of the flow battery. For example, a sealing material with good temperature resistance, pressure resistance, and aging resistance can be selected to ensure the reliability and lifespan of the seal. For example, polytetrafluoroethylene (PTFE), which has good temperature resistance, pressure resistance, and aging resistance, can be selected as the sealing material.

[0065] In this embodiment, reference is continued. Figure 3 The first end face 11 is located in a plane perpendicular to the axial direction of the main body 10. The depth of each first groove 111 gradually decreases from the inside to the outside along the radial direction of the main body 10. And / or the groove width of each first groove 111 gradually decreases from the inside to the outside along the radial direction of the main body 10. And / or the cross-sectional area of ​​each first groove 111 gradually decreases from the inside to the outside along the radial direction of the main body 10.

[0066] With this configuration, the elastic pressure of the sealing gasket 100 against the sealed component, such as the adapter 60, can gradually increase from the inside to the outside along the radial direction of the main body 10. Specifically, since the first end face 11 is located in a plane perpendicular to the axial direction of the main body 10, after setting multiple first grooves 111, the continuous annular structure 112 between adjacent first grooves 111 has the same thickness along the axial direction of the main body 10. After installation, the adapter 60 and the core 80 press against the sealing gasket 100 from both sides, which actually applies pressure to the sealing gasket 100. When the continuous annular structure 112 moves into the first groove 111, it is actually equivalent to releasing the pressure to a certain extent. The further outward the radial direction, the smaller the size of the first groove 111, and the less the continuous annular structures 112 on both sides of the first groove 111 move inward into the first groove 111. This results in less stress leakage. More of the continuous annular structures 112 on both sides of the first groove 111 participate in compression along the axial direction of the main body 10, thus generating greater elastic resistance. This change in elastic resistance from the inside to the outside of the main body 10 causes the sealing performance of the gasket 100 to gradually increase radially from the inside to the outside. Compared to related technologies where the sealing ring maintains a constant elastic resistance in the radial direction and cannot effectively support stress concentration areas, this arrangement better supports stress concentration areas, giving the gasket 100 better load-bearing capacity, reliability, and stability. It also effectively improves the reliability and lifespan of the seal. This design better adapts to changes in the operating environment of flow batteries, such as temperature and pressure variations.

[0067] Meanwhile, by changing the size of each first groove 111, the sealing performance of the sealing gasket 100 in the radial direction can be precisely controlled, which can effectively avoid sealing failure and improve the reliability of the seal.

[0068] It should be noted that the depth of the first groove 111 refers to the depth dimension of the first groove 111 along the axial direction of the main body 10, the groove width of the first groove 111 refers to the width dimension of the first groove 111 along the radial direction of the main body 10, and the cross-sectional area of ​​the first groove 111 refers to the area of ​​the closed shape enclosed by the intersection of the cross-section of the first groove 111 and the plane where the first end face 11 is located.

[0069] In practice, the cross-section of the first groove 111 can be square, semi-circular, dovetail-shaped, etc.

[0070] In this embodiment of the application, when the depth of each first groove 111 gradually decreases from the inside to the outside along the radial direction of the main body 10, the depth of the first groove 111 located on the radially outer side is 0.8-0.9 times, preferably 0.75 times, the depth of the first groove 111 located on the radially inner side.

[0071] When the width of each first groove 111 gradually decreases from the inside to the outside along the radial direction of the main body 10, the width of the first groove 111 located on the radially outer side is 0.8-0.9 times, preferably 0.75 times, the width of the first groove 111 located on the radially inner side.

[0072] When the cross-sectional area of ​​each first groove 111 gradually decreases from the inside to the outside along the radial direction of the main body 10, the cross-sectional area of ​​the first groove 111 located on the radially outer side is 0.8-0.9 times, preferably 0.75 times, the cross-sectional area of ​​the first groove 111 located on the radially inner side.

[0073] This configuration ensures optimal sealing performance of the sealing gasket 100. Furthermore, the spacing between the first grooves 111 along the radial direction of the body 10 can be equal, or it can gradually decrease from the inside to the outside along the radial direction of the body 10.

[0074] In this embodiment of the application, combined with Figure 1 and Figure 7 At least one of the inner and outer peripheral surfaces of the positioning protrusion 20 is provided with an elastic protrusion 21.

[0075] This design facilitates the assembly of the positioning protrusion 20 and the mating groove 61. When the positioning protrusion 20 is inserted into the mating groove 61, the elastic protrusion 21 elastically abuts against the inner wall of the mating groove 61, which can further limit the positioning.

[0076] Furthermore, the positioning protrusion 20 is provided with elastic protrusions 21 on both the inner and outer peripheral surfaces, and the positions of the elastic protrusions 21 on the inner peripheral surface and the elastic protrusions 21 on the outer peripheral surface correspond to each other.

[0077] In a specific implementation, there are six elastic protrusions 21 on both the inner and outer circumferential surfaces. The elastic protrusions 21 on the inner circumferential surface are evenly distributed along the circumference of the main body 10, and the elastic protrusions 21 on the outer circumferential surface are evenly distributed along the circumferential direction of the main body 10. Of course, the number of elastic protrusions 21 can be set to other values ​​as needed.

[0078] In this embodiment of the application, as described above, the main body 10 also includes a second end face 12, on which at least one second groove (not shown) may be formed, the second groove being arranged around the axis of the main body 10.

[0079] With this configuration, groove structures are provided on the first end face 11 and the second end face 12 of the main body 10 in the axial direction. The adapter 60 is better elastically pressed against the first end face 11 side of the sealing gasket 100, and the core 80 is better elastically abutted against the second end face 12 side of the sealing gasket 100, thereby further improving the sealing performance of the sealing gasket 100.

[0080] Furthermore, the projections of each of the first grooves 111 and the second groove on the first end face 11 coincide.

[0081] This arrangement ensures that the portions on both sides of the first groove 111 in the width direction and the portions on both sides of the second groove in the width direction correspond to each other, allowing for elastic pressure on the adapter 60 and the core 80 at corresponding positions. Furthermore, the second end face 12 can be parallel to the first end face 11, and the second end face 12 can be perpendicular to the axial direction of the main body 10.

[0082] A second aspect of this application also provides a flow battery 200, see reference to Figures 4-7 The flow battery 200 may include an adapter 60, a core 80, and a sealing gasket 100 as described above. The adapter 60 has a mating groove 61 on its end face facing the core 80.

[0083] The sealing gasket 100 is sandwiched between the core 80 and the adapter 60, and the positioning protrusion 20 is inserted into the mating groove 61. Both the adapter 60 and the core 80 include flow holes. The flow holes of the adapter 60, the inner annular surface of the sealing gasket 100, and the flow holes of the core 80 together define a flow channel 30.

[0084] Of course, before installation, the diameter of the inner annular surface of the gasket 100 is slightly smaller than the flow hole of the adapter 60 and also slightly smaller than the flow hole of the core 80. With this configuration, when the gasket 100 is installed between the adapter 60 and the core 80, the main body 10 is pressed and undergoes elastic deformation along the radial direction of the main body 10. Part of the inner annular surface of the gasket 100 will move inward, roughly corresponding to the inner wall of the flow hole of the adapter 60 and the inner wall of the flow hole of the core 80, thereby forming a relatively smooth inner wall of the flow channel 30.

[0085] Furthermore, the flow battery also includes an end plate 50, an adapter 60 mounted on the end plate 50, the end plate 50 being connected to the core 80 by bolts 52, and the end of the adapter 60 being provided with a connecting flange 62.

[0086] The end plate 50 has a countersunk hole structure 51 on the surface facing the core 80. The connecting flange 62 abuts against the bottom wall of the countersunk hole structure 51, and the sealing gasket 100 abuts against the end face of the connecting flange 62. In some embodiments, the sealing gasket 100 may be located in the countersunk hole structure 51 together with the connecting flange 62.

[0087] With this configuration, the gasket 100 can press the connecting flange 62 against the bottom wall of the countersunk structure 51 on the side of the end plate 50 facing the core 80. When the gasket 100 is located inside the countersunk structure 51, it can also reduce the gap between the core 80 and the end cap. At the same time, when installing the gasket 100, the countersunk structure 51 can also provide coarse positioning for the gasket 100 and the end plate 50. After the gasket 100 enters the countersunk structure 51, the pre-positioning of the gasket 100 and the adapter 60 can be achieved simply by inserting the positioning protrusion 20 into the mating groove 61.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A sealing gasket used for sealing adapters and cores in flow batteries, characterized in that, The sealing gasket includes: The main body, which is ring-shaped and includes a first end face along the axial direction; and A positioning protrusion is provided on the first end face. The positioning protrusion is annular and arranged around the axis of the main body. The positioning protrusion is configured to be able to be inserted into the mating groove of the adapter end face. The first end face has at least one first groove, which surrounds the outer periphery of the positioning protrusion.

2. The sealing gasket according to claim 1, characterized in that, The number of the first grooves is at least two, and the at least two first grooves are arranged at radial intervals along the body, with the first groove located at the innermost radial side of the body having a distance from the positioning protrusion.

3. The sealing gasket according to claim 2, characterized in that, The first end face is located in a plane perpendicular to the axis of the main body; The depth of each of the first grooves gradually decreases from the inside to the outside along the radial direction of the body; and / or The width of each of the first grooves gradually decreases from the inside to the outside along the radial direction of the body; and / or The cross-sectional area of ​​each of the first grooves gradually decreases from the inside to the outside along the radial direction of the body.

4. The sealing gasket according to claim 3, characterized in that, When the depth of each of the first grooves gradually decreases from the inside to the outside along the radial direction of the main body, the depth of the first groove located on the outer side of the radial direction among adjacent first grooves is 0.8-0.9 times the depth of the first groove located on the inner side of the radial direction. When the width of each of the first grooves gradually decreases from the inside to the outside along the radial direction of the main body, the width of the first groove located on the outer side of the radial direction among adjacent first grooves is 0.8-0.9 times the width of the first groove located on the inner side of the radial direction. When the cross-sectional area of ​​each of the first grooves gradually decreases from the inside to the outside along the radial direction of the body, the cross-sectional area of ​​the first groove located on the outer side of the radial direction among adjacent first grooves is 0.8-0.9 times that of the first groove located on the inner side of the radial direction.

5. The sealing gasket according to any one of claims 1-4, characterized in that, At least one of the inner and outer peripheral surfaces of the positioning protrusion is provided with an elastic protrusion.

6. The sealing gasket according to any one of claims 1-4, characterized in that, The positioning protrusion has elastic protrusions on both its inner and outer circumferential surfaces, and the elastic protrusions on the inner circumferential surface and the elastic protrusions on the outer circumferential surface are positioned to correspond to each other.

7. The sealing gasket according to claim 1, characterized in that, The main body further includes a second end face, which is arranged opposite to the first end face along the axial direction of the main body; The second end face has at least one second groove, which is arranged around the axis of the main body.

8. The sealing gasket according to claim 7, characterized in that, The projections of the first groove and the second groove on the first end face coincide.

9. A flow battery, characterized in that, It includes an adapter, a core, and a gasket as described in any one of claims 1-8, wherein the end face of the adapter facing the core is provided with a mating groove; The sealing gasket is sandwiched between the core and the adapter, and the positioning protrusion is inserted into the mating groove; both the adapter and the core include a flow hole, and the flow hole of the adapter, the inner annular surface of the sealing gasket, and the flow hole of the core together define a flow channel.

10. The flow battery according to claim 9, characterized in that, The flow battery also includes an end plate, the adapter is mounted on the end plate, the end plate is connected to the core, and the end of the adapter is provided with a connecting flange. The end plate has a countersunk hole structure on the surface facing the core, the connecting flange abuts against the bottom wall of the countersunk hole structure, and the sealing gasket abuts against the end face of the connecting flange.

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