Sealing gasket and flow battery

Abstract

The utility model relates to a sealing gasket and a flow battery. Comprising a ring-shaped body, and the body comprises a first abutting surface and a second abutting surface which are opposite to each other; the first abutting face and / or the second abutting face are / is provided with at least one groove, the body is divided into an inner side part and an outer side part along the midpoint of the width of the body, and the volume of the groove located in the outer side part is larger than that of the groove located in the inner side part. At least one groove is formed in the abutting face of the body, and the volume of the groove located on the outer side is larger than that of the groove located on the inner side, so that the groove located on the outer side can disperse large stress borne by the portion, close to the outer side, of the body; therefore, the problem that the body (close to the outer side area) with high stress is excessively compressed and is damaged due to the fact that the compression rate allowed by the sealing gasket is exceeded is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid flow battery sealing, in particular to a sealing gasket and a liquid flow battery. BACKGROUND

[0002] A liquid flow battery is a battery that stores and releases electrical energy by flowing electrolyte solution in the battery. Due to its high safety, long cycle life and good scalability, the liquid flow battery has a wide application prospect in the fields of renewable energy storage, power grid peak shaving and electric vehicles. However, the leakage of electrolyte solution during the working process of the liquid flow battery has always been an important factor limiting its performance and life.

[0003] In the related art, a sealing gasket is usually arranged between, for example, an electrode frame and an electrode plate in the liquid flow battery to avoid leakage of the electrolyte solution. However, since a high locking force is required when the liquid flow battery is packaged, and the sealing gasket with a relatively small surface area needs to bear a higher pressure; in addition, due to the influence of the slight deformation of the electrode frame, the stress on the inside and outside of the sealing gasket is not equal, for example, the stress on the outside of the sealing gasket is greater than the stress on the inside, that is, the compression amount of the outside of the sealing gasket is greater than the compression amount of the inside, which is likely to cause excessive compression amount due to large deformation of the outside, thereby exceeding the allowable compression deformation amount of the sealing material, causing damage to the sealing gasket due to excessive compression, and thus causing leakage of the electrolyte, affecting the service life and safety of the liquid flow battery. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a sealing gasket and a liquid flow battery to solve the problem that the stress on the inside and outside of the sealing gasket is not equal, which is likely to cause excessive compression amount due to large deformation of the outside, thereby exceeding the allowable compression deformation amount of the sealing material, causing damage to the sealing gasket due to excessive compression.

[0005] The present application provides a sealing gasket for sealing a liquid flow battery, which comprises:

[0006] a body, the body being annular, the body comprising opposite first and second abutting surfaces;

[0007] wherein the first abutting surface and / or the second abutting surface is / are configured with at least one groove, the body is divided into an inside portion and an outside portion along the midpoint of the width of the body, and the volume of the groove located in the outside portion is greater than the volume of the groove located in the inside portion.

[0008] In one embodiment, the groove is annular and coaxially arranged with the body.

[0009] The first abutting surface and the second abutting surface are flat and parallel to each other.

[0010] In one embodiment, the first abutting surface and / or the second abutting surface are provided with a plurality of grooves, which are arranged sequentially along the direction from the outer side surface of the body to the inner side surface of the body, and the volume of each groove gradually decreases.

[0011] In one embodiment, a plurality of the grooves are arranged sequentially at intervals;

[0012] The groove near the outer surface of the main body has a preset distance from the outer surface of the main body;

[0013] The groove near the inner surface of the body has a preset distance from the inner surface of the body.

[0014] In one embodiment, both the first abutting surface and the second abutting surface are provided with a plurality of the grooves;

[0015] The plurality of grooves located on the first abutting surface are correspondingly provided with the plurality of grooves located on the first abutting surface;

[0016] Alternatively, along the width of the body, the plurality of grooves located on the first abutment surface are offset from the plurality of grooves located on the first abutment surface.

[0017] In one embodiment, as the volume of each groove gradually decreases from the outer side to the inner side of the body, the volume of the groove near the outer side of the body is 1.1-1.5 times the volume of the groove near the inner side of the body.

[0018] In one embodiment, the first abutting surface and / or the second abutting surface are provided with a groove, the groove being located on the outer portion and having a predetermined distance from the outer surface of the body.

[0019] In one embodiment, along the extension direction of the groove, the orthographic projection view of the groove is at least one of a semicircle, triangle, trapezoid, rectangle, and polygon.

[0020] In one embodiment, the ratio of the depth of the groove to the thickness of the body along the axial direction of the body is 0.1-0.7.

[0021] This application also provides a flow battery, including an electrode plate, an electrode frame, and a sealing gasket as described in the above embodiments, wherein the sealing gasket is disposed between the electrode plate and the electrode frame.

[0022] The aforementioned sealing gasket and flow battery, by constructing at least one groove on the contact surface of the main body, with the volume of the groove on the outer portion being larger than that on the inner portion, allows the outer portion of the groove to disperse the greater stress on the main body near the outer side. This prevents the main body (the area near the outer side) from being excessively compressed beyond the allowable compression rate of the sealing gasket, thus avoiding damage. This arrangement effectively disperses stress in areas of high concentration, resulting in better sealing performance and reliability of the sealing gasket. Consequently, it better copes with changes in the operating environment (temperature and pressure variations) of the flow battery, contributing to improved performance and lifespan. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a sealing gasket provided according to some embodiments of this application.

[0024] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of AA.

[0025] Figure 3 This is a schematic diagram of the structure of a sealing gasket in a flow battery according to some embodiments of this application.

[0026] Figure 4 This is a cloud map showing the packaging stress distribution of a flow battery according to some embodiments of this application.

[0027] Figure 5 This is a stress distribution cloud map of the sealing gasket area provided according to some embodiments of this application.

[0028] Figure 6 This is a cloud map showing the strain displacement distribution of the sealing gasket region according to some embodiments of this application.

[0029] Icon labels:

[0030] 100. Body; 110. First abutting surface; 120. Second abutting surface; 101. Groove; 130. Inner part; 140. Outer part;

[0031] 200. Reaction Zone;

[0032] 300. Electrode plate;

[0033] 400. Electrode frame. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application 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 application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0036] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0039] It should be noted that if 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. If 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. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] In related technologies, sealing gaskets are typically placed between electrode frames and electrode plates in flow batteries to prevent electrolyte leakage. However, flow batteries require high locking forces during encapsulation, and the relatively small surface area of ​​the sealing gasket necessitates withstanding even higher pressure. Furthermore, due to minor deformations of the electrode frame, the stress on the inner and outer sides of the sealing gasket is uneven; for example, the stress on the outer side of the sealing gasket is greater than that on the inner side. This results in greater compression on the outer side than on the inner side, easily leading to excessive compression due to greater deformation on the outer side. This can exceed the allowable compression deformation of the sealing material, causing the sealing gasket to be over-compressed and damaged, resulting in electrolyte leakage and affecting the lifespan and safety of the flow battery.

[0041] To address the aforementioned problems, this application provides a sealing gasket that effectively disperses high stress, preventing stress concentration at a specific point on the gasket, thereby effectively reducing wear and deformation and extending the service life of the sealing ring. (See also...) Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of the sealing gasket provided according to some embodiments of this application; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA; Figure 3 This is a schematic diagram of the structure of a sealing gasket provided according to some embodiments of this application in a flow battery. One embodiment of this application provides a sealing gasket for sealing a flow battery, and the sealing gasket may include a body 100.

[0042] The body 100 is annular and includes a first abutting surface 110 and a second abutting surface 120. The first abutting surface 110 and / or the second abutting surface 120 are provided with at least one groove 101. The body 100 is divided into an inner portion 130 and an outer portion 140 along the midpoint of its width. The volume of the groove 101 located in the outer portion 140 is greater than the volume of the groove 101 located in the inner portion 130.

[0043] Understandably, before designing the sealing gasket structure provided in this application, the encapsulation pressure of the entire stack is first calculated based on the pressure and area data of the reaction zone 200 of the flow battery (stack) and the stress area of ​​the sealing gasket. Based on the stack encapsulation pressure, a stress simulation analysis is performed on the stack and the sealing gasket inside it. It is found that in the sealing area corresponding to the sealing gasket, the stress near the outer side is greater than the stress near the inner side, that is, the stress is more concentrated closer to the outer edge of the sealing area.

[0044] The body 100 of the sealing gasket provided in this example can be circular, rectangular, or other shapes adapted to the interior of the flow battery, without limitation.

[0045] Taking the U-shaped body 100 as an example, since the stress it is subjected to is concentrated on the outside, the deformation on the outside of the sealing area is greater than that on the inside. That is, the compression on the outside is greater than that on the inside. If the compression is too large, it is easy to cause the sealing gasket to be over-compressed and damaged, resulting in electrolyte leakage, which affects the service life and safety of the fuel cell stack.

[0046] Based on this, this example optimizes the gasket structure by creating grooves in areas of the body 100 where stress is concentrated, thereby reducing the impact of excessive compression on the gasket's lifespan. In other words, grooves 101 are constructed in areas of the body 100 where stress is high to distribute the stress, thus preventing these areas from being over-compressed beyond the gasket's allowable compression ratio and causing damage.

[0047] The body 100 can be flat and has two opposing large surfaces. For ease of description, the two large surfaces are defined as the first abutting surface 110 and the second abutting surface 120. The abutting surfaces are used to contact the electrode frame 400 or the electrode plate 300.

[0048] For ease of understanding, the width direction of this part is from the outer side to the inner side of the body 100. The body 100 is divided into an inner part 130 and an outer part 140 along the midpoint of its width; that is, the width of the inner part 130 is equal to the width of the outer part 140. Based on the stress distribution simulation structure described above, it can be seen that the stress on the area of ​​the body 100 near the outer side is greater than the stress on the area near the inner side. Therefore, the cases in which the groove 101 is constructed on the body 100 (taking the construction of the groove 101 on the first abutment surface 110 as an example) can include at least the following:

[0049] In one method, a groove 101 is provided only on the outer portion 140 to disperse the higher stress on the outer portion 140 through the groove 101.

[0050] Method 2: A groove 101 is constructed on the first abutting surface 110. However, the groove 101 spans the inner portion 130 and the outer portion 140. The volume of the groove 101 located on the outer portion 140 is larger than that of the groove 101 located on the inner portion 130. Since the groove 101 on the outer portion 140 has a larger volume, it can also disperse the higher stress on the outer portion 140.

[0051] Method 3: Multiple grooves 101 are constructed on the first contact surface 110. However, the volume of the groove 101 near the outer side of the body 100 in two adjacent grooves 101 is larger than the volume of the groove 101 near the inner side of the body 100. This allows the groove 101 near the outer side of the body 100 to disperse more stress, that is, to effectively disperse the stress in areas where stress is concentrated. This results in the sealing gasket having better load-bearing capacity, reliability, and stability.

[0052] Of course, the method of setting the groove 101 on the body 100 is not limited to the above three methods. Any groove 101 setting form with the same effect as the above is included in the protection scope of this application.

[0053] The dimensions (width, depth) and shape of the groove 101 formed on the first abutment surface 110 or the second abutment surface 120 are not specifically limited, but are designed to effectively disperse the concentrated stress on the body 100.

[0054] In this application, by constructing at least one groove 101 on the contact surface of the body 100, and making the volume of the groove 101 located on the outer portion 140 larger than the volume of the groove 101 located on the inner portion 130, the groove 101 located on the outer portion 140 can disperse the larger stress on the body 100 near the outer side, thereby preventing the body 100 (the area near the outer side) from being over-compressed due to higher stress, exceeding the compression ratio allowed by the sealing gasket and causing damage. This arrangement can effectively disperse the stress in areas with high concentration, thereby giving the sealing gasket a better sealing effect and reliability; and thus better cope with changes in the operating environment (temperature changes, pressure changes) of the flow battery, which is beneficial to improving the performance and lifespan of the flow battery.

[0055] It should be noted that the material of the body 100 can be selected according to the working environment of the flow battery, and a sealing material with good temperature resistance, pressure resistance and aging resistance can be selected. For example, polytetrafluoroethylene (PTFE) can be selected as the manufacturing material to ensure the sealing reliability and life of the gasket.

[0056] In addition, the above-mentioned simulation analysis process of fuel cell stack packaging pressure and stress on fuel cell stack and sealing gasket can be as follows:

[0057] Given: Area A of the internal reaction zone 200 of the fuel cell stack: 0.416 m²; Internal working pressure P of the fuel cell stack: 300000 Pa; Area S of the sealing gasket region: 0.1216 m²; Safety factor of the fuel cell stack working pressure: 2.

[0058] According to the formula P=F / A, we can get: F_encapsulation = P_internal * A * safety factor = 300000 * 0.416 * 2 = 249600N, that is, the minimum locking force required for the fuel cell stack encapsulation is 249600N.

[0059] Taking the cross-sectional dimensions of the fuel cell stack as an example, the electrode frame 400 is designed with dimensions of 1220mm * 585mm * 8mm. The electrode frame 400 has 24 bolt locking holes (the fuel cell stack can be encapsulated using cable ties, etc.), with a total locking force of 249600N. The sealing area corresponding to the gasket is 0.1216m². Using simulation software for stress analysis, a stress distribution cloud diagram of the electrode frame 400 can be obtained, as shown below. Figure 4 As shown, Figure 4 This is a cloud map showing the packaging stress distribution of a flow battery according to some embodiments of this application.

[0060] like Figure 5 As shown, Figure 5Based on the stress distribution cloud map of the sealing gasket area provided in some embodiments of this application, it can be concluded from the interpretation of the obtained stress distribution cloud map of the sealing area that the stress near the outer side of the U-shaped sealing gasket is greater than the stress near the inner side, and the stress is more concentrated closer to the edge of the outer side.

[0061] like Figure 6 As shown, Figure 6 The strain-displacement distribution cloud map of the sealing gasket region provided in some embodiments of this application shows that the deformation of the U-shaped sealing gasket near the outer side is greater than that near the inner side. This indicates that the outer area of ​​the sealing gasket is easily damaged by excessive compression, accelerating its aging and failure, leading to electrolyte leakage, and affecting the lifespan and safety of the fuel cell stack.

[0062] Below, please refer to the appendix. Figure 1 -Appendix Figure 6 The specific structure of the sealing gasket provided in the embodiments of this application will be described in detail.

[0063] like Figure 1 As shown, in some embodiments, the groove 101 is annular and coaxially arranged with the body 100; the first abutment surface 110 and the second abutment surface 120 are planar and parallel to each other.

[0064] Specifically, the groove 101 in this example is also annularly arranged, that is, the groove 101 formed on the first abutment surface 110 or the second abutment surface 120 is arranged along the annular trajectory of the body 100. This arrangement can ensure the effective sealing of the gasket. In addition, the two abutment surfaces of the body 100 provided in this example are planes and are arranged in parallel. This arrangement can effectively avoid the situation where one side of the body 100 is higher than the other side, which is prone to poor sealing due to deviations in component dimensions. It can also be understood that this example provides the groove 101 on a general gasket to solve the problem of the gasket failing due to excessive compression on the outer side.

[0065] like Figure 2 As shown, in some embodiments, the first abutting surface 110 and / or the second abutting surface 120 are provided with a plurality of grooves 101. Along the direction from the outer side surface of the body 100 to the inner side surface of the body 100, the plurality of grooves 101 are arranged in sequence, and the volume of each groove 101 gradually decreases.

[0066] Specifically, grooves 101 can be constructed only on the first abutment surface 110 or the second abutment surface 120, and multiple grooves 101 can be constructed from the outer side to the inner side of the body 100, with the multiple grooves 101 arranged sequentially and the volume of each groove 101 gradually decreasing. Of course, grooves 101 can also be constructed on both the first abutment surface 110 and the second abutment surface 120 at the same time, without limitation.

[0067] From the outer surface to the inner surface of the body 100, the stress on the body 100 decreases, and the volume of the groove 101 also decreases. This arrangement effectively disperses stress, avoids stress concentration, thereby reducing wear and deformation of the gasket and extending its service life. Furthermore, the arrangement of multiple grooves 101 with different volumes allows for more precise control of stress on the gasket, effectively preventing seal failure, improving seal reliability, reducing the risk of electrolyte leakage in the fuel cell stack, and enhancing the safety of fuel cell stack operation.

[0068] The aforementioned multiple grooves 101 can be arranged adjacent to each other. Of course, in some embodiments, the multiple grooves 101 can also be arranged at intervals. The grooves 101 near the outer side of the body 100 have a preset distance from the outer side of the body 100. The grooves 101 near the inner side of the body 100 have a preset distance from the inner side of the body 100.

[0069] Specifically, when the main body 100 located between the grooves 101 is compressed, it can overflow into the grooves 101 to achieve the purpose of stress dissipation. Since there is space for overflow after compression at the outer and inner sides of the main body 100, that is, space inside and outside the main body 100, the grooves 101 near the outer side of the main body 100 and the outer side of the main body 100 are spaced apart. Similarly, the grooves 101 near the inner side of the main body 100 and the inner side of the main body 100 are spaced apart. The above-mentioned spacing can be set according to the actual stress magnitude and the volume of the grooves 101, and is not limited here.

[0070] In some embodiments, both the first abutting surface 110 and the second abutting surface 120 are provided with a plurality of grooves 101; the plurality of grooves 101 located on the first abutting surface 110 are correspondingly provided with the plurality of grooves 101 located on the first abutting surface 110.

[0071] Specifically, in this example, multiple grooves 101 can be constructed on both the first abutment surface 110 and the second abutment surface 120 according to the thickness of the body 100. The number of grooves 101 on the two abutment surfaces can be the same and correspondingly arranged, but there is no specific limitation. For example, the volume of the groove 101 on the first abutment surface 110 is equal to the volume of the corresponding groove 101 on the second abutment surface 120. Of course, the volume of the groove 101 on the first abutment surface 110 is greater than the volume of the corresponding groove 101 on the second abutment surface 120.

[0072] In addition to the above-mentioned arrangement, in one example, along the width of the body 100, a plurality of grooves 101 located on the first abutment surface 110 are misaligned with each other.

[0073] Specifically, the plurality of grooves 101 corresponding to the first abutment surface 110 and the second abutment surface 120 can be moved out of alignment along the width direction of the body 100. This arrangement can still disperse the stress concentration area and save materials.

[0074] like Figure 2 As shown, in some embodiments, when the volume of each groove 101 gradually decreases from the outer side to the inner side of the body 100, the volume of the groove 101 near the outer side of the body 100 is 1.1-1.5 times the volume of the groove 101 near the inner side of the body 100.

[0075] Specifically, the shape and size of each groove 101 in this example are not specifically limited, but it is necessary to ensure that the volume of the groove 101 near the outer side of the body 100 is greater than the volume of the groove 101 near the inner side of the body 100. For example, the volume of the groove 101 near the outer side is 1.2 times, 1.3 times or 1.4 times the volume of the groove 101 near the inner side, but there is no limitation.

[0076] To facilitate manufacturing, the shapes of each groove 101 can be set to be consistent. In some embodiments, along the extension direction of the groove 101, the orthographic projection view of the groove 101 is at least one of a semicircle, triangle, trapezoid, rectangle, and polygon.

[0077] Specifically, the orthographic projection view of the groove 101 can be referred to as the cross-sectional shape of the groove 101. The cross-sectional shape of each groove 101 is semi-circular, or the cross-sectional shape of each groove 101 is trapezoidal, but there is no limitation.

[0078] In addition to the above-mentioned arrangement of multiple grooves 101 on the contact surface of the body 100, in some embodiments, the first contact surface 110 and / or the second contact surface 120 may be constructed with a groove 101, the groove 101 being located on the outer portion 140 and having a predetermined distance from the outer side of the body 100.

[0079] Specifically, since the area near the outer side of the body 100 (outer part 140) experiences high stress and large compression, constructing a groove 101 in the outer part 140 can also disperse the stress concentration in this part, thereby reducing the wear and deformation of the gasket and extending the service life of the gasket.

[0080] In some embodiments, the ratio of the depth of the groove 101 to the thickness of the body 100 along the axial direction of the body 100 is 0.1-0.7.

[0081] Specifically, the ratio of the depth of the groove 101 to the thickness of the body 100 should not be too small. If it is too small, the stress dispersion effect will be poor, and the compression of the outer part 140 will still be large. Of course, the ratio of the depth of the groove 101 to the thickness of the body 100 should not be too large. If it is too large, it will easily cause the body 100 to split from the groove 101, which is not conducive to the overall integrity of the body 100. For example, the groove 101 near the inner side of the body 100 has a depth-to-thickness ratio of 0.1; the groove 101 in the middle has a depth-to-thickness ratio of 0.3; and the groove 101 near the outer side of the body 100 has a depth-to-thickness ratio of 0.7.

[0082] Combination Figure 3 As shown in the figure, this application embodiment also provides a flow battery, which may include an electrode plate 300, an electrode frame 400 and a sealing gasket as described in the above embodiment, with the sealing gasket disposed between the electrode plate 300 and the electrode frame 400.

[0083] Specifically, the structure of the flow battery can be understood by referring to relevant technologies. The side of the sealing gasket with the groove 101 can face the electrode plate 300 or the electrode frame 400. When the flow battery is encapsulated, the area of ​​the sealing gasket near the outer side will bear higher stress. However, due to the setting of the groove 101 on the outer side, the stress in the outer area can be distributed, avoiding stress concentration. This setting can reduce the wear and deformation of the sealing gasket, extend the service life of the sealing gasket, thereby reducing the risk of electrolyte leakage in the stack, improving the safety of stack operation, making the application more reliable and the failure rate lower.

[0084] 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.

[0085] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A sealing gasket, characterized in that, For sealing a flow battery, the sealing gasket includes: The body is ring-shaped and includes opposing first and second abutment surfaces; The first abutting surface and / or the second abutting surface are provided with at least one groove, which divides the body into an inner part and an outer part along the midpoint of the width of the body, and the volume of the groove located in the outer part is greater than the volume of the groove located in the inner part.

2. The sealing gasket according to claim 1, characterized in that, The groove is annular and coaxially arranged with the body; The first contact surface and the second contact surface are planes and are parallel to each other.

3. The sealing gasket according to claim 2, characterized in that, The first abutting surface and / or the second abutting surface are constructed with a plurality of grooves, which are arranged sequentially along the direction from the outer side surface of the body to the inner side surface of the body, and the volume of each groove gradually decreases.

4. The sealing gasket according to claim 3, characterized in that, Multiple grooves are arranged sequentially at intervals; The groove near the outer surface of the main body has a preset distance from the outer surface of the main body; The groove near the inner surface of the body has a preset distance from the inner surface of the body.

5. The sealing gasket according to claim 3, characterized in that, Both the first abutting surface and the second abutting surface are constructed with a plurality of the aforementioned grooves; The plurality of grooves located on the first abutting surface are correspondingly provided with the plurality of grooves located on the first abutting surface; Alternatively, along the width of the body, the plurality of grooves located on the first abutment surface are offset from the plurality of grooves located on the first abutment surface.

6. The sealing gasket according to claim 3, characterized in that, As the volume of each groove gradually decreases from the outer side to the inner side of the body, the volume of the groove closest to the outer side of the body is 1.1-1.5 times the volume of the groove closest to the inner side of the body.

7. The sealing gasket according to claim 2, characterized in that, The first abutting surface and / or the second abutting surface are configured with a groove, the groove being located on the outer portion and having a predetermined distance from the outer surface of the body.

8. The sealing gasket according to any one of claims 1-7, characterized in that, Along the extension direction of the groove, the orthographic projection view of the groove is at least one of a semicircle, triangle, trapezoid, rectangle, and polygon.

9. The sealing gasket according to any one of claims 1-7, characterized in that, Along the axial direction of the body, the ratio of the depth of the groove to the thickness of the body is 0.1-0.

7.

10. A flow battery, characterized in that, It includes an electrode plate, an electrode frame, and a sealing gasket as described in any one of claims 1-9, wherein the sealing gasket is disposed between the electrode plate and the electrode frame.

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