Sealing structure of all-vanadium redox flow battery

Abstract

The utility model discloses an all-vanadium redox flow battery sealing structure which comprises a battery shell, and the upper end of the battery shell is provided with a sealing cavity with a concentric-square-shaped structure. The utility model has the beneficial effects that the water swelling strip, the magnetic plate I and the magnetic plate II are arranged, so that in the use process of the all-vanadium redox battery, the magnetic plate I and the magnetic plate II are combined to adsorb and fix the sealing ring in the sealing cavity, and meanwhile, the external joint of the sealing ring and the sealing cavity is magnetically sealed; the water swelling strip seals the internal joint of the sealing ring and the sealing cavity, meanwhile, in the sealing process, when electrolyte leaks, the water swelling strip freely swells at the moment, then the sealing space of the sealing ring and the sealing cavity is further filled, the electrolyte can be effectively prevented from overflowing, and the service life of the sealing ring is prolonged. According to the structure, two sealing mechanisms can be formed to seal the battery cover plate and the battery shell, so that the sealing effect can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of vanadium redox flow battery technology, specifically to a sealed structure for a vanadium redox flow battery. Background Technology

[0002] A vanadium redox flow battery is a redox battery that uses vanadium as the active material in a circulating liquid state. The electrical energy of the vanadium battery is stored as chemical energy in a sulfuric acid electrolyte containing vanadium ions of different valence states. An external pump forces the electrolyte into the battery stack, where it circulates within different storage tanks and half-cells under mechanical force. A proton exchange membrane serves as the separator in the battery pack. The electrolyte solution flows parallel across the electrode surfaces and undergoes electrochemical reactions. Current is collected and conducted through dual electrode plates, thus converting the chemical energy stored in the solution into electrical energy.

[0003] Existing vanadium redox flow battery sealing structures achieve a seal by conventionally placing a sealing ring between the battery cover and the battery casing. However, this method suffers from uneven stress on the sealing ring, leading to poor contact between the ring and the battery cover and casing. This can cause electrolyte leakage, affecting the sealing effect and reducing the battery's lifespan. Therefore, a new vanadium redox flow battery sealing structure is urgently needed to solve these problems. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this utility model is to provide a vanadium redox flow battery sealing structure that has good sealing effect, high performance and long service life, in light of the current state of the technology.

[0006] (II) Technical Solution

[0007] This utility model is achieved through the following technical solution: This utility model proposes a sealing structure for a full vanadium redox flow battery, including a battery housing, a U-shaped sealing cavity at the upper end of the battery housing, a battery cover plate above the battery housing, a sealing ring fixed on the bottom wall of the battery cover plate at a position corresponding to the sealing cavity, a second magnetic plate installed on the outer wall of the sealing ring, a first magnetic plate fixed on one side wall of the inner side of the sealing cavity, and a water-swellable water-stop strip provided on the inner wall of the sealing ring.

[0008] Furthermore, the sealing cavity is formed on the battery casing, and the sealing ring is fixed to the battery cover plate by screws.

[0009] By adopting the above technical solution, the sealing cavity combined with the sealing ring can perform preliminary sealing between the battery cover and the battery casing.

[0010] Furthermore, the sealing ring is inserted into the sealing cavity, and the thickness formed by the sealing ring, the second magnetic plate, and the water-swellable sealing strip is consistent with the inner diameter specification of the sealing cavity.

[0011] By adopting the above technical solution, the tightness of the connection between the sealing ring and the sealing cavity is ensured when the sealing ring is inserted into the sealing cavity.

[0012] Furthermore, the second magnetic plate is bonded to the outer wall of the sealing ring, and the first magnetic plate is bonded to the inside of the sealing cavity. The magnetic properties of the first magnetic plate and the second magnetic plate are opposite.

[0013] By adopting the above technical solution, the combination of magnetic plate one and magnetic plate two can adsorb and fix the sealing ring in the sealing cavity, and at the same time, magnetically seal the connection between the sealing ring and the outside of the sealing cavity.

[0014] Furthermore, the water-swellable sealing strip is adhered to the inner wall of the sealing ring.

[0015] By adopting the above technical solution, the water-swellable sealing strip can further seal the internal connection between the sealing ring and the sealing cavity. At the same time, during the sealing process, when electrolyte leakage occurs, the water-swellable sealing strip will expand freely, thereby further filling the sealing space of the sealing ring and the sealing cavity, which can effectively prevent electrolyte overflow.

[0016] Furthermore, fixing seats are formed at the four corners of the battery casing, and connecting seats are formed at the four corners of the battery cover.

[0017] By adopting the above technical solution, the connecting seat and the fixing seat, as connecting members, can easily fix the battery cover plate to the upper end of the battery casing.

[0018] Furthermore, both the connecting seat and the fixing seat are provided with fixing holes.

[0019] By adopting the above technical solution, the fixing hole provides a through space for the fixing bolt, thereby connecting and fixing the battery cover to the battery casing.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] To address the problem that existing vanadium redox flow battery sealing structures conventionally rely on a sealing ring between the battery cover and the battery casing for sealing, which suffers from uneven stress on the sealing ring leading to poor contact with the battery cover and casing, and consequently, electrolyte leakage, this invention addresses the issue by incorporating a water-swellable sealing strip, a magnetic plate (first type), and a magnetic plate (second type) to improve the sealing performance of the vanadium redox flow battery. During the use of the liquid battery, the combination of magnetic plate one and magnetic plate two can adsorb and fix the sealing ring in the sealing cavity, and at the same time, magnetic seal the external connection between the sealing ring and the sealing cavity. The water-swellable sealing strip seals the internal connection between the sealing ring and the sealing cavity. During the sealing process, when electrolyte leakage occurs, the water-swellable sealing strip will expand freely, further filling the sealing space of the sealing ring and the sealing cavity, which can effectively prevent electrolyte overflow. This structure can form two sealing mechanisms to seal between the battery cover and the battery casing, which can effectively improve the sealing effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the sealing structure of a full vanadium redox flow battery according to the present invention;

[0024] Figure 2 This is an exploded schematic diagram showing the connection relationship between the battery cover and the battery casing in the sealing structure of a full vanadium redox flow battery described in this utility model;

[0025] Figure 3 This is a bottom view of the battery cover plate in the vanadium redox flow battery sealing structure described in this utility model;

[0026] Figure 4 This utility model describes a sealed structure for a full vanadium redox flow battery. Figure 3 Enlarged view of point A in the middle.

[0027] The annotations in the attached figures are explained as follows:

[0028] 1. Battery casing; 2. Battery cover; 3. Connecting seat; 4. Fixing seat; 5. Fixing hole; 6. Sealing cavity; 7. Magnetic plate one; 8. Magnetic plate two; 9. Water-swellable sealing strip; 10. Sealing ring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] like Figures 1-4As shown, a vanadium redox flow battery sealing structure in this embodiment includes a battery housing 1. A U-shaped sealing cavity 6 is formed at the upper end of the battery housing 1. A battery cover plate 2 is positioned above the battery housing 1. A sealing ring 10 is fixed on the bottom wall of the battery cover plate 2 at a position corresponding to the sealing cavity 6. The sealing cavity 6 and the sealing ring 10, when combined, provide a preliminary seal between the battery cover plate 2 and the battery housing 1. A second magnetic plate 8 is installed on the outer wall of the sealing ring 10, and a first magnetic plate 7 is fixed on one side wall of the inner side of the sealing cavity 6. The first magnetic plate 7 and the second magnetic plate... The combination of 8 can adsorb and fix the sealing ring 10 in the sealing cavity 6, and at the same time magnetically seal the external connection between the sealing ring 10 and the sealing cavity 6. A water-swellable sealing strip 9 is provided on the inner wall of the sealing ring 10. The water-swellable sealing strip 9 can further seal the internal connection between the sealing ring 10 and the sealing cavity 6. At the same time, during the sealing process, when electrolyte leakage occurs, the water-swellable sealing strip 9 will expand freely, thereby further filling the sealing space of the sealing ring 10 and the sealing cavity 6, which can effectively prevent electrolyte overflow.

[0031] like Figures 1-4 As shown, in this embodiment, the sealing cavity 6 is formed on the battery casing 1, and the sealing ring 10 is fixed to the battery cover plate 2 by screws. The sealing ring 10 is inserted into the sealing cavity 6. The thickness of the sealing ring 10, the magnetic plate 8, and the water-swellable sealing strip 9 is consistent with the inner diameter of the sealing cavity 6. The magnetic plate 8 is bonded to the outer wall of the sealing ring 10, and the magnetic plate 7 is bonded to the inside of the sealing cavity 6. The magnetic plates 7 and 8 have opposite magnetic properties. The water-swellable sealing strip 9 is bonded to the inner wall of the sealing ring 10.

[0032] like Figures 1-4 As shown, in this embodiment, the battery housing 1 has a fixing seat 4 formed at the four corners, and the battery cover 2 has a connecting seat 3 formed at the four corners. The connecting seat 3 and the fixing seat 4 serve as connectors to facilitate fixing the battery cover 2 to the upper end of the battery housing 1. The connecting seat 3 and the fixing seat 4 are both provided with fixing holes 5, which provide a through space for fixing bolts, thereby connecting and fixing the battery cover 2 to the battery housing 1.

[0033] The specific implementation process of this embodiment is as follows: First, the battery cover plate 2 is inserted into the sealing cavity 6 through the sealing ring 10 and positioned above the battery housing 1. Then, the two are connected and fixed through the connecting seat 3 and the fixing hole 5 on the fixing seat 4. During use, when the all-vanadium liquid battery is in use, the magnetic plate 1 7 and the magnetic plate 2 8 combine to adsorb and fix the sealing ring 10 in the sealing cavity 6, and at the same time, the external connection between the sealing ring 10 and the sealing cavity 6 is magnetically sealed. The water-swellable sealing strip 9 seals the internal connection between the sealing ring 10 and the sealing cavity 6. At the same time, during the sealing process, when electrolyte leakage occurs, the water-swellable sealing strip 9 expands freely, thereby further filling the sealing space of the sealing ring 10 and the sealing cavity 6, which can effectively prevent electrolyte overflow. This structure can form two sealing mechanisms to seal between the battery cover plate 2 and the battery housing 1, which can effectively improve the sealing effect.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealed structure for an all-vanadium redox flow battery, characterized in that: The battery housing (1) includes a sealed cavity (6) with a U-shaped structure at the upper end of the battery housing (1), a battery cover plate (2) is provided above the battery housing (1), a sealing ring (10) is fixed on the bottom wall of the battery cover plate (2) at a position corresponding to the sealed cavity (6), a magnetic plate two (8) is installed on the outer wall of the sealing ring (10), a magnetic plate one (7) is fixed on one side wall of the sealed cavity (6), and a water-swellable water-stop strip (9) is provided on the inner wall of the sealing ring (10).

2. The sealed structure of an all-vanadium redox flow battery according to claim 1, characterized in that: The sealing cavity (6) is formed on the battery housing (1), and the sealing ring (10) is fixed on the battery cover plate (2) by screws.

3. The sealed structure of an all-vanadium redox flow battery according to claim 1, characterized in that: The sealing ring (10) is inserted into the sealing cavity (6), and the thickness formed by the sealing ring (10), the magnetic plate (8) and the water-swellable sealing strip (9) is consistent with the inner diameter specification of the sealing cavity (6).

4. The sealed structure of an all-vanadium redox flow battery according to claim 1, characterized in that: The second magnetic plate (8) is bonded to the outer wall of the sealing ring (10), and the first magnetic plate (7) is bonded to the sealing cavity (6). The magnetic properties of the first magnetic plate (7) and the second magnetic plate (8) are opposite.

5. The sealed structure of an all-vanadium redox flow battery according to claim 3, characterized in that: The water-swellable sealing strip (9) is adhered to the inner wall of the sealing ring (10).

6. The sealed structure of an all-vanadium redox flow battery according to claim 5, characterized in that: The battery casing (1) has a fixing seat (4) formed at the four corners, and the battery cover (2) has a connecting seat (3) formed at the four corners.

7. The sealed structure of an all-vanadium redox flow battery according to claim 6, characterized in that: Both the connecting seat (3) and the fixing seat (4) are provided with fixing holes (5).

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