Leakage-proof structure of galvanic pile

Abstract

The utility model discloses an electric pile liquid leakage prevention structure, belongs to the technical field of flow battery leakage prevention, and particularly relates to an electric pile liquid leakage prevention structure which comprises a first end plate, a second end plate, a first electrode frame and a second electrode frame, the second end plate, the first electrode frame and the second electrode frame are connected to the positioning piece in a sliding mode through positioning holes, a leakage-proof tenon is fixedly installed at the end of the first electrode frame, and a leakage-proof mortise groove is formed in the bottom of the second electrode frame. And the sealing effect is stable, so that the problems that the quality and the service life are not easy to control, the cost is high and the cost performance is low due to long-term use of a sealing ring in the industry are solved, and large-scale and industrialized energy storage of the all-vanadium redox flow battery is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid flow battery leakage prevention, in particular to a battery stack leakage prevention structure. Background Art

[0002] All-vanadium liquid flow battery is a battery that uses vanadium as the basic material and uses electrochemical reactions to store and release energy. It has the advantages of high efficiency, environmental protection, reliability, and long life. The positive and negative electrodes of the all-vanadium liquid flow battery both use vanadium ion solution. Through the electrode reaction in the liquid flow battery system, the vanadium ions are converted into electron flow to achieve the storage and release of electrical energy. Due to its unique advantages, the all-vanadium liquid flow battery is widely used in wind power generation, photovoltaic power generation, grid peak regulation, emergency power supply and other fields.

[0003] The battery stack is the core component of the all-vanadium liquid flow battery energy storage system. Its performance directly determines the overall operation effect and life of the system. At present, the commonly used sealing methods for the battery stack of the all-vanadium liquid flow battery energy storage system include sealing gaskets, wire seals, surface seals, welding, etc., but the sealing methods are relatively simple and expensive, and cannot achieve a good sealing effect, resulting in leakage of the electrolyte in the battery stack. After long-term operation, the positive and negative electrolytes will mix, and the electrolyte is an acidic solution, which will cause corrosion or crystallization inside the battery stack, causing the performance of the battery stack to decay, affecting the operating performance and life of the battery.

[0004] Therefore, it is necessary to provide a new anti-leakage structure of the battery stack to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a battery stack anti-leakage structure to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A liquid leakage prevention structure for a battery stack comprises a first end plate, a second end plate, a first electrode frame and a second electrode frame, wherein the first end plate and the second end plate are arranged in a clamp shape, and the first end plate and the second end plate are arranged in a sandwich through a positioning piece, the first end plate is fixedly mounted with a positioning piece, the second end plate, the first electrode frame and the second electrode frame are slidably connected to the positioning piece through a positioning hole, a liquid inlet and a liquid flow channel are provided on the first electrode frame, one end of the liquid flow channel is connected to the liquid inlet in a channel-like flow connection, a leak-proof tenon is fixedly mounted on the end of the first electrode frame, the leak-proof tenon is arranged around the liquid inlet and the liquid flow channel, a leak-proof mortise is provided at the bottom of the second electrode frame, and the position of the leak-proof mortise corresponds to the position of the leak-proof tenon.

[0008] As a further description of the above technical solution:

[0009] The cross-sectional shape of the leak-proof tenon is two symmetrical corner-cut rectangles, the ratio of the width of the corner-cut rectangle to the distance between the two corner-cut rectangles is 6:13, and the ratio of the width of the cross-sectional shape of the leak-proof tenon to the height is 2:1.

[0010] As a further description of the above technical solution:

[0011] The leak-proof mortise is a groove with a rounded rectangular cross section, the ratio of the cross-sectional width to the height of the leak-proof mortise is 2:1, and the ratio of the cross-sectional width of the leak-proof mortise to the cross-sectional width of the leak-proof tenon is 24:25.

[0012] As a further description of the above technical solution:

[0013] The first electrode frame, the second electrode frame and the leak-proof tenon are made of polypropylene plastic.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] The problem of electrolyte leakage in the battery stack is solved by setting leak-proof tenons and leak-proof mortise and tenon structures. The process is simple and the sealing effect is stable, thus solving the problems of poor quality and life control caused by long-term use of sealing rings in the industry, as well as high costs and low cost performance, which is conducive to the scale and industrialization of all-vanadium liquid flow battery energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 This is a cross-sectional view of the first electrode frame of the present utility model;

[0018] Figure 3 It is a cross-sectional view of the installation state of the first electrode frame and the second electrode frame of the utility model;

[0019] Figure 4 It is a cross-sectional view of the installation state of the first electrode frame and the second electrode frame of the utility model;

[0020] Legend: 1. First end plate; 2. Second end plate; 3. Positioning piece; 4. First electrode frame; 5. Second electrode frame; 6. Positioning hole; 7. Liquid inlet; 8. Liquid flow channel; 9. Leak-proof tenon; 10. Leak-proof mortise. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 As shown, the utility model provides a technical solution: a stack anti-leakage structure, comprising a first end plate 1, a second end plate 2, a first electrode frame 4 and a second electrode frame 5, the first end plate 1 and the second end plate 2 are arranged in a clip shape, the first end plate 1 and the second end plate 2 are arranged in a sandwich through a positioning member 3, the first end plate 1 is fixedly installed with a positioning member 3, the second end plate 2, the first electrode frame 4 and the second electrode frame 5 are slidably connected to the positioning member 3 through a positioning hole 6, in a specific embodiment, the first end plate 1 and the second end plate 2 are fixed together by the positioning member 3, the first electrode frame 4 is provided with a liquid inlet 7 and a liquid flow channel 8, one end of the liquid flow channel 8 is connected to the liquid inlet 7 in a channel-type flow connection, the end of the first electrode frame 4 is fixedly installed with a leak-proof tenon 9, the leak-proof tenon 9 is arranged around the liquid inlet 7 and the liquid flow channel 8, the bottom of the second electrode frame 5 is provided with a leak-proof mortise 10, the position of the leak-proof mortise 10 corresponds to the position of the leak-proof tenon 9. The positioning holes 6 are distributed on the surface of the first electrode frame 4.

[0023] The specific implementation method is as follows: the first electrode frame 4 is provided with the liquid inlet 7, the electrolyte flows in from the liquid inlet 7, the liquid inlet 7 is connected to the liquid flow channel 8, the liquid flow channel 8 is surrounded by two components, the leak-proof tenon 9 and the leak-proof mortise 10 for the mortise and tenon structure, the positioning member 3 and the positioning hole 6 are used to press and fix the second end plate 2, the first electrode frame 4 and the second electrode frame 5.

[0024] The cross-sectional shape of the leak-proof tenon 9 is two symmetrical corner-cut rectangles, the ratio of the width of the corner-cut rectangle to the distance between the two corner-cut rectangles is 6:13, and the ratio of the cross-sectional width to the height of the leak-proof tenon 9 is 2:1.

[0025] The leak-proof mortise 10 is a groove with a rounded rectangular cross section, the ratio of the cross-sectional width to the height of the leak-proof mortise 10 is 2:1, and the ratio of the cross-sectional width of the leak-proof mortise 10 to the cross-sectional width of the leak-proof tenon 9 is 24:25.

[0026] The first electrode frame 4 , the second electrode frame 5 and the leak-proof tenon 9 are made of polypropylene plastic.

[0027] The specific implementation method is as follows: the leak-proof tenon 9 and the leak-proof mortise 10 used for the mortise and tenon structure surround the periphery of the liquid flow channel 8, and the position, size and shape of the leak-proof tenon 9 are adapted to the leak-proof mortise 10, and the leak-proof tenon 9 is divided into two parts that are symmetrical to each other on the left and right, each part is 1.2 mm wide and 2.5 mm thick, and is provided with a chamfer, and the spacing between the two parts is 2.6 mm; the leak-proof mortise 10 is 4.8 mm wide and 2.5 mm deep, and is provided with a rounded corner. During installation, the flexible material used in the leak-proof tenon 9 has the characteristic of deformation, so that the two parts of the leak-proof tenon 9 are each deformed inward by 0.1 mm and tightly engaged with the corresponding leak-proof mortise 10 to form a mortise and tenon structure.

[0028] Working principle: During normal use, the first electrode frame 4 is provided with the liquid inlet 7, and the electrolyte flows in from the liquid inlet 7. The liquid inlet 7 is connected to the liquid flow channel 8. The liquid flow channel 8 is surrounded by two components, the leak-proof tenon 9 and the leak-proof mortise 10, for the mortise and tenon structure. During assembly, the first electrode frame 4, the second electrode frame 5, and the positioning holes 6 on the second end plate 2 are inserted into the positioning member 3 in sequence, and the first electrode frame 4, the second electrode frame 5, and the second end plate 2 are positioned and fixed on the first end plate 1, so that the leak-proof tenons 9 of the first electrode frame 4 and the second electrode frame 5 are aligned with the positioning member 3. The leak-proof tenon 12 is adapted to the position of the leak-proof mortise 10, and the flexible material used in the leak-proof tenon 12 has the deformation property to allow the two parts of the leak-proof tenon 9 to deform inward by 0.1 mm respectively and tightly engage with the corresponding leak-proof tenon 10 to form a mortise and tenon structure, thereby achieving a compression connection between the first electrode frame 4 and the second electrode frame 5. The leak-proof tenon 9 structure has a certain elasticity to make the structure more stable, thereby preventing the liquid flow channel 8 from leaking and causing the internal resistance of the battery stack to increase, and achieving isolation between the positive and negative electrolytes, thereby avoiding the mixing of the positive and negative electrolytes and the problem of battery stack performance degradation caused by leakage.

[0029] In the description of the present invention, it is necessary to understand that the terms "bottom", "top", "up", "down", "one end", "the other end", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stack anti-leakage structure, comprising a first end plate (1), a second end plate (2), a first electrode frame (4) and a second electrode frame (5), characterized in that: The first end plate (1) and the second end plate (2) are arranged in a clamp-like shape. The first end plate (1) and the second end plate (2) are arranged in a sandwich through a positioning member (3). The second end plate (2), the first electrode frame (4) and the second electrode frame (5) are slidably connected to the positioning member (3) through a positioning hole (6). The first electrode frame (4) is provided with a liquid inlet (7) and a liquid flow channel (8). One end of the liquid flow channel (8) is connected to the liquid inlet (7) in a channel-like flow connection. A leak-proof tenon (9) is fixedly mounted on the end of the first electrode frame (4). The leak-proof tenon (9) is arranged around the liquid inlet (7) and the liquid flow channel (8). The bottom of the second electrode frame (5) is provided with a leak-proof mortise (10). The position of the leak-proof mortise (10) corresponds to the position of the leak-proof tenon (9).

2. The anti-leakage structure of a battery stack according to claim 1, characterized in that: The cross-sectional shape of the leak-proof tenon (9) is two mutually symmetrical corner-cut rectangles, the ratio of the width of the corner-cut rectangle to the distance between the two corner-cut rectangles is 6:13, and the ratio of the width to the height of the cross-sectional shape of the leak-proof tenon (9) is 2:

1.

3. The anti-leakage structure of a battery stack according to claim 1, characterized in that: The leak-proof mortise (10) is a groove with a rounded rectangular cross section, the ratio of the cross-sectional width to the height of the leak-proof mortise (10) is 2:1, and the ratio of the cross-sectional width of the leak-proof mortise (10) to the cross-sectional width of the leak-proof tenon (9) is 24:

25.

4. The anti-leakage structure of a battery stack according to claim 1, characterized in that: The first electrode frame (4), the second electrode frame (5) and the leak-proof tenon (9) are made of polypropylene plastic.

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