Redox flow battery electrode frame, single battery and vanadium redox flow battery stack structure

Abstract

The utility model relates to the technical field of electric piles, and discloses a flow battery electrode frame, a single battery and a vanadium flow battery electric pile structure. The electrode frame of the flow battery comprises a frame body, the at least two end lugs are oppositely arranged on the edge of the frame body; a first via hole is formed in the end lug; the sliding rail is formed or arranged at the edge of the frame body and is distributed in the length direction of the frame body; the sliding block is in sliding connection with the sliding rail; a sliding groove matched with the sliding rail is formed in the end face of the side, facing the sliding rail, of the sliding block. A through hole is formed in the sliding block; and the sliding block can be separated from the sliding rail. According to the technical scheme, when a single single battery needs to be maintained or replaced, the whole electric pile structure does not need to be disassembled, only part of the connecting pieces of the electric pile structure need to be disassembled, the electric pile structure basically keeps the original structural shape, and the replacement operation of the single single battery can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode frames, in particular to a liquid flow battery electrode frame, a single cell and a vanadium liquid flow battery stack structure. Background Art

[0002] The common all-vanadium liquid flow battery stack structure is composed of end plates, current collecting plates, bipolar plates, electrode frames, electrode sheets, diaphragms and other structures stacked together.

[0003] In the long-term operation of the all-vanadium liquid flow battery stack, electrolyte leakage or other problems may occur due to the aging of components and seals. The stack contains multiple single cells. When the above problems occur in a single cell, the single cell usually needs to be replaced or repaired. In the prior art, it is necessary to disassemble the entire stack structure, find the damaged single cell, and reassemble the stack structure after repair or replacement. This method of replacing and repairing the stack, on the one hand, is cumbersome and time-consuming to disassemble and assemble. On the other hand, frequent disassembly and assembly of the stack will reduce the sealing performance of the stack. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art that the steps for replacing or repairing a single cell are complicated and the sealing performance of the battery stack is reduced due to the replacement or repair of a single cell.

[0005] In order to achieve the above-mentioned object, the utility model provides a flow battery electrode frame in a first aspect, comprising:

[0006] The frame body, with its center position spreading outward to form an electrode cavity adapted to the shape of the electrode sheet and used for installing the electrode sheet;

[0007] End ears, at least two of which are arranged opposite to each other at the edge of the frame body; each end ear is provided with a first through hole;

[0008] A slide rail is formed or arranged at the edge of the frame body and distributed along the length direction of the frame body; at least two of the slide rails are arranged opposite to each other at the edge of the frame body;

[0009] A slider is slidably connected to the slide rail; a slide groove adapted to the slide rail is arranged on the end surface of the slider facing the slide rail; a through hole is arranged on the slider; and the slider can be detached from the slide rail.

[0010] Furthermore, one end of the slide groove is closed, and the other end is formed with an open guide groove.

[0011] Furthermore, the slide rail extends from a bottom edge close to or flush with the frame body along the length direction of the frame body toward the top edge of the frame body; the length of the slide rail is less than the length from the bottom edge to the end ear.

[0012] Furthermore, the number of the end ears is two, and the two end ears are arranged on both side edges of the frame body and close to the top edge of the frame body;

[0013] Furthermore, the slide rails are provided in two numbers, and the two slide rails are provided at the two side edges of the frame body and close to the bottom edge of the frame body;

[0014] Furthermore, a handle is provided on the top edge of the frame body.

[0015] The second aspect of the utility model provides a single cell, wherein the single cell comprises the liquid flow battery electrode frame and an electrode sheet installed in the liquid flow battery electrode frame.

[0016] The third aspect of the utility model provides a vanadium liquid flow battery stack structure, the vanadium liquid flow battery stack structure comprising:

[0017] A first end plate and a second end plate arranged opposite to each other;

[0018] The single cells, a plurality of which are stacked in a set stacking direction and located in a receiving space formed by the first end plate and the second end plate;

[0019] A connecting structure is capable of connecting in series a plurality of end ears and sliders on the flow battery electrode frame and fixing the first end plate and the second end plate on both sides of the flow battery electrode frame to maintain the accommodation space formed by the first end plate and the second end plate.

[0020] Furthermore, the connection structure comprises:

[0021] A second via hole, aligned with the first via hole or through hole, provided on the first end plate and the second end plate;

[0022] A screw rod capable of passing through the first via hole, the through hole and the second via hole at the same time;

[0023] A nut is matched with the screw rod.

[0024] Through the above technical solution, when a single cell needs to be repaired or replaced, there is no need to disassemble the entire battery stack structure. Only some connectors of the battery stack structure need to be disassembled. The battery stack structure generally maintains its original structural shape, and the replacement operation of a single cell can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the liquid flow battery electrode frame of the utility model;

[0026] Figure 2 It is a structural schematic diagram of another embodiment of the liquid flow battery electrode frame of the utility model;

[0027] Figure 3 It is a structural schematic diagram of an implementation method of a slider;

[0028] Figure 4 This is a structural schematic diagram of an implementation method of the vanadium liquid flow battery stack structure of the utility model;

[0029] Figure 5 There are two implementation methods for removing a single cell.

[0030] Description of Reference Numerals

[0031] 10 frame body; 20 end ear; 21 first through hole; 30 slide rail; 40 slider; 41 slide groove; 42 through hole; 43 guide groove; 50 handle; 60 first end plate; 70 second end plate; 80 screw rod; 81 nut. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] The first aspect of the utility model provides a flow battery electrode frame, such as Figure 1-Figure 3 As shown, the flow battery electrode frame includes a frame body 10, an end ear 20, a slide rail 30 and a slider 40. The frame body 10 has an electrode cavity extending from its center to the surroundings. The electrode cavity is used to install an electrode sheet, and its shape is adapted to the shape of the electrode sheet.

[0034] At least two end ears 20 are provided. The two end ears 20 are arranged oppositely at the edge of the frame body 10. The end ears 20 are provided with a first through hole 21. At least two slide rails 30 are provided, and at least two slide rails 30 are formed or arranged at the edge of the frame body 10 and distributed along the length direction of the frame body 10 and arranged oppositely at the edge of the frame body 10.

[0035] It should be noted that the difference between “formed” and “set” here is that “formed” means that the slide rail 30 and the frame body 10 are integrally formed, while “set” means that the slide rail 30 is not integrally formed with the frame body 10, but is installed on the frame body 10 as a separate component.

[0036] In a preferred embodiment, two of the end ears 20 and two of the slide rails 30 are provided. The two end ears 20 are provided on both side edges of the frame body 10 and close to the top edge of the frame body 10 .

[0037] The two slide rails 30 are arranged on both side edges of the frame body 10 and close to the bottom edge of the frame body 10. Further, the slide rail 30 extends from the bottom edge of the frame body 10 close to or flush with the frame body 10 along the length direction of the frame body 10 to the top edge of the frame body 10, and the length of the slide rail 30 is less than the length from the bottom edge to the end ear 20. Preferably, the length of the slide rail 30 is one sixth of the length of the frame body 10. Further preferably, the end ear 20 and the slide rail 30 are symmetrical about the length center point of the frame body 10.

[0038] It should be noted that "the number of the end ears 20 and the slide rail 30 is set to two, and the end ears 20 and the slide rail 30 are set to be symmetrical with respect to the length center point of the frame body 10". The advantage of such a setting is that the balance of the entire battery frame can be maintained.

[0039] It should also be noted that the "length direction of the frame body" mentioned above refers to Figure 1 The height direction in the state.

[0040] The slider 40 is slidably connected to the slide rail 30. A slide groove 41 adapted to the slide rail 30 is provided on the end surface of the slider 40 facing the slide rail 30. A through hole 42 is provided on the slider 40. The slider 40 can slide on the slide rail 30 and can also be detached from the slide rail 30. This means that one end of the slide groove 41 is closed and the other end is open. In order to facilitate the slide rail 30 to enter the slide groove 41, a guide groove 43 is formed at the other end of the slide groove 41.

[0041] like Figure 1 and Figure 2 As shown, in order to facilitate the removal of the frame body 10, a handle 50 is provided at the top edge of the frame body 10. The handle 50 is provided at the center of the upper edge of the frame body 10. The span of the handle 50 should not be too small, otherwise an unbalanced phenomenon may occur when the frame body 10 is pulled out. Preferably, the span of the handle 50 occupies more than half of the length of the frame body 10.

[0042] It should be noted that the so-called “span of the handle 50 ” refers to the length of the handle 50 , and the so-called “the span of the handle 50 occupies more than half of the length of the frame body 10 ” means that the length of the handle 50 occupies more than half of the length of the frame body 10 .

[0043] The second aspect of the utility model provides a single cell, comprising a liquid flow battery electrode frame and an electrode sheet installed in the liquid flow battery electrode frame.

[0044] The third aspect of the utility model provides a vanadium liquid flow battery stack structure, such as Figure 1-Figure 4 As shown, the vanadium liquid flow battery stack structure includes: a first end plate 60 and a second end plate 70 arranged opposite to each other, the single cell and a connection structure.

[0045] The plurality of single cells are stacked in a set stacking direction and are located in the accommodation space formed by the first end plate 60 and the second end plate 70. The connection structure can connect the end ears 20 and the sliders 40 on the plurality of flow battery electrode frames in series and fix the first end plate 60 and the second end plate 70 on both sides of the flow battery electrode frame to maintain the accommodation space formed by the first end plate 60 and the second end plate 70.

[0046] Further, the connection structure includes a second through hole, a nut 81 and a screw 80. The second through hole is aligned with the first through hole 21 or the through hole 42, and is provided on the first end plate 60 and the second end plate 70. The screw 80 can pass through the first through hole 21, the through hole 42 and the second through hole at the same time. The nut 81 is adapted to the screw 80.

[0047] like Figure 5 As shown, when a single battery needs to be repaired or replaced:

[0048] Undo the two nuts near the top edge of the end plate; if the cells are pressed tightly together, you can undo the four nuts and move the end plate slightly, but you don’t need to move the end plate beyond the screws, so that the cells have some space to move.

[0049] Then pull out the two corresponding screws 80. It should be noted that the screws 80 do not need to be pulled out completely, and only need to be pulled out to the end ears corresponding to the single battery to be replaced;

[0050] The single battery can then be pulled out with the help of the handle 50 and the single battery can be repaired or directly replaced;

[0051] Reverse the operation to install the battery stack.

[0052] The technical solution of the utility model does not require the entire battery stack structure to be disassembled, but only requires the disassembly of some of the connectors of the battery stack structure. The battery stack structure generally maintains the original structural shape, and the replacement of a single cell can be achieved. This solves the problem that the existing method of removing single cells requires the entire battery stack structure to be disassembled, the disassembly and assembly process is cumbersome, and takes a long time. Frequent disassembly and assembly of the battery stack will lead to reduced sealing performance of the battery stack.

[0053] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flow battery electrode frame, characterized in that: The flow battery electrode frame comprises: The frame body (10) has an electrode cavity which is adapted to the shape of the electrode sheet and is used to install the electrode sheet and which is spread out from its central position to the surrounding areas; End ears (20), at least two of the end ears (20) are arranged opposite to each other on the edge of the frame body (10); and a first through hole (21) is arranged on the end ears (20); A slide rail (30) is formed or arranged at an edge of the frame body (10) and distributed along the length direction of the frame body (10); at least two of the slide rails (30) are arranged relatively at the edge of the frame body (10); A slider (40) is slidably connected to the slide rail (30); a slide groove (41) adapted to the slide rail (30) is provided on one end surface of the slider (40) facing the slide rail (30); a through hole (42) is provided on the slider (40); and the slider (40) can be detached from the slide rail (30).

2. The flow battery electrode frame according to claim 1, characterized in that: One end of the slide groove (41) is closed, and the other end is formed with an open guide groove (43).

3. The flow battery electrode frame according to claim 1, characterized in that: The slide rail (30) extends from a position close to or flush with the bottom edge of the frame body (10) along the length direction of the frame body (10) toward the top edge of the frame body (10); the length of the slide rail (30) is less than the length from the bottom edge to the end ear (20).

4. The flow battery electrode frame according to claim 1, characterized in that: The number of end ears (20) is two, and the two end ears (20) are arranged on the two side edges of the frame body (10) and close to the top edge of the frame body (10).

5. The flow battery electrode frame according to claim 1, characterized in that: The slide rails (30) are provided in two numbers, and the two slide rails (30) are provided on the two side edges of the frame body (10) and close to the bottom edge of the frame body (10).

6. The flow battery electrode frame according to claim 1, characterized in that: A handle (50) is provided on the top edge of the frame body (10).

7. A single cell battery, characterized in that: The single cell comprises the liquid flow battery electrode frame according to any one of claims 1 to 6 and an electrode sheet installed in the liquid flow battery electrode frame.

8. A vanadium liquid flow battery stack structure, characterized in that: The vanadium liquid flow stack structure comprises: A first end plate (60) and a second end plate (70) arranged opposite to each other; The single cell according to claim 7, wherein a plurality of the single cells are stacked in a set stacking direction and are located in a receiving space formed by the first end plate (60) and the second end plate (70); A connection structure capable of connecting a plurality of end ears (20) and sliders (40) on the flow battery electrode frame in series and fixing the first end plate (60) and the second end plate (70) on both sides of the flow battery electrode frame to maintain a receiving space formed by the first end plate (60) and the second end plate (70).

9. The vanadium liquid flow battery stack structure according to claim 8, characterized in that: The connection structure comprises: A second through hole, aligned with the first through hole (21) or the through hole (42), and provided on the first end plate (60) and the second end plate (70); A screw rod (80) capable of simultaneously passing through the first through hole (21), the through hole (42), and the second through hole; The nut (81) is matched with the screw rod (80).

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