Electric pile structure of all-vanadium redox flow battery

Abstract

The utility model discloses a galvanic pile structure of an all-vanadium redox flow battery, which comprises a pair of symmetrical end plates, the pair of symmetrical end plates are oppositely arranged, a plurality of single battery packs are stacked between the pair of symmetrical end plates, the plurality of single battery packs are arranged in a one-way linear array, a pair of collector plates are symmetrically arranged on the inner sides of the pair of symmetrical end plates, and the collector plates are arranged on the inner sides of the pair of symmetrical end plates. A pair of wiring sheets extends from one side of the pair of collector plates; the utility model relates to the technical field of galvanic pile structures, and in the galvanic pile structure of the all-vanadium redox flow battery, the symmetrical end plates and a plurality of single battery packs are limited by adopting the annularly distributed counter-pull insertion rods, and then the integrated counter-pull structure is arranged on the outer sides of the symmetrical end plates, so that the counter-pull of the plurality of counter-pull insertion rods can be synchronously controlled through the integrated counter-pull structure; and during disassembly and assembly, the disassembly and assembly operation can be quickly completed through the integrated counter-pull structure, so that overhaul and maintenance of the galvanic pile are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of battery stack structures, in particular to a battery stack structure of an all-vanadium liquid flow battery. Background Art

[0002] The all-vanadium liquid flow battery is a redox battery with vanadium as the active material in a circulating liquid state. The all-vanadium liquid flow battery is mainly composed of positive and negative electrode storage tanks for storing electrolyte, battery stacks, pumps and management systems. Among them, the vanadium battery stack is mainly composed of positive electrode, negative electrode and diaphragm.

[0003] The current vanadium battery stack structure consists of bipolar plates, gaskets, and ion exchange membranes. The structural arrangement mainly adopts a stacking layout, and the external shell is tightened with bolts. However, this method requires the removal and replacement of each bolt during the battery stack disassembly and replacement, which is very cumbersome. Although power tools can be used, a large amount of disassembly and assembly work cannot be avoided. Not only is the inspection and replacement work intensive, but it also requires tedious management work. In view of this, in-depth research on the above issues led to the creation of this case. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a battery stack structure for an all-vanadium liquid flow battery, which solves the problems of the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a stack structure of an all-vanadium liquid flow battery, comprising a pair of symmetrical end plates, the pair of symmetrical end plates being arranged opposite each other, a plurality of single cell groups stacked between the pair of symmetrical end plates, the plurality of single cell groups being arranged in a unidirectional linear array, a pair of current collecting plates being symmetrically arranged on the inner sides of the pair of symmetrical end plates, and a pair of terminal lugs extending from one side of the pair of current collecting plates;

[0006] The single cell group is composed of a pair of bipolar plates and an ion exchange membrane, and a sealing frame is provided on the outside of the single cell group;

[0007] A plurality of jacks are provided on one of the symmetrical end plates of a pair, and a plurality of reverse pull rods are installed in the plurality of jacks; a plurality of reverse pull holes are opened on the other of the symmetrical end plates of a pair corresponding to the plurality of jacks;

[0008] The sealing frame, the insertion hole and the reverse pulling hole are provided with guide holes correspondingly;

[0009] The reverse pull rod passes through the insertion hole, the guide hole and the reverse pull hole. An integrated reverse pull structure is provided on the outer side of the reverse pull hole to reversely pull and fix the reverse pull rod.

[0010] Preferably, the reverse pull rod matches the diameters of the jack, the guide hole and the reverse pull hole, one end of the reverse pull rod is provided with a card slot, and the other end of the reverse pull rod is a circular limit seat.

[0011] Preferably, the end of the reverse pull rod is sleeved with a reverse pull limit seat, and a limit spring is further provided between the reverse pull limit seat and the circular limit seat.

[0012] Preferably, the pair of symmetrical end plates are a pair of rectangular structured plates, and the outer dimensions of the sealing frame match the dimensions of the symmetrical end portions.

[0013] Preferably, the integrated reverse pull structure includes a reverse pull strip, a reverse pull strip is provided on the outer side of the symmetrical end plate, a pair of adjusting screws are symmetrically provided on both sides of the symmetrical end plate, a pair of reverse pull nuts are symmetrically provided on the reverse pull strip, a pair of reverse pull nuts are threadedly connected to a pair of adjusting screws, a card slot is provided at the end of the reverse pull rod, and a reverse pull piece is provided on the reverse pull strip to match the card slot.

[0014] Beneficial effects

[0015] The utility model provides a stack structure for an all-vanadium redox flow battery. The structure has the following beneficial effects: the stack structure employs circular back-pull rods to limit the position of symmetrical end plates and multiple single cell groups, and an integrated back-pull structure is provided on the outer sides of the symmetrical end plates. The integrated back-pull structure can synchronously control the back-pull of multiple back-pull rods, thereby achieving the effect of quickly back-pull-and-fix the symmetrical end plates. During assembly and disassembly, the integrated back-pull structure allows for rapid assembly and disassembly, facilitating inspection and maintenance of the stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the battery stack structure of the all-vanadium redox flow battery described in the present invention.

[0017] Figure 2 This is a schematic diagram of the three-dimensional explosion structure of the battery stack structure of the all-vanadium redox flow battery described in the present invention.

[0018] Figure 3 This is a schematic diagram of the partial explosion structure of the battery stack structure of the all-vanadium redox flow battery described in the present invention.

[0019] Figure 4 This is a side view schematic cross-sectional structural diagram of the battery stack structure of an all-vanadium liquid flow battery described in the present invention.

[0020] In the figure: 1. Symmetrical end plate; 2. Single battery pack; 3. Current collecting plate; 4. Wiring lug; 5. Jack; 6. Back-pull plug; 7. Back-pull hole; 8. Guide hole; 9. Slot; 10. Circular limit seat; 11. Back-pull limit seat; 12. Limit spring; 13. Back-pull strip; 14. Adjusting screw; 15. Back-pull nut; 16. Back-pull tab; 201. Sealing frame; 202. Ion exchange membrane; 203. Bipolar plate. DETAILED DESCRIPTION

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

[0022] See also Figure 1-4 The utility model provides an implementation scheme: In the application process of modern liquid flow batteries, the stack structure of vanadium batteries is used for ion exchange in the battery. The current stack of liquid flow batteries is mainly composed of stacked ion membranes, so the external frame needs to be pulled and fixed to avoid leakage. However, when fixing the stack structure at this stage, tension screws are mostly used for fixing, but this fixing method requires a lot of operations and is cumbersome.

[0023] To address the above-mentioned problems, the present application discloses a stack structure of an all-vanadium liquid flow battery, which adopts a stack structure of ion exchange membranes 202. Specifically, a pair of symmetrical end plates 1 are used on both sides of the stack as an external closed shell, and the pair of symmetrical end plates 1 are arranged relative to each other. A plurality of single battery groups 2 are stacked between the pair of symmetrical end plates 1, and the plurality of single battery groups 2 are arranged in a unidirectional linear array. The single battery groups 2 are arranged in a unidirectional array to form an overall battery pack, and a pair of current collecting plates 3 are symmetrically arranged on the inner side of the pair of symmetrical end plates 1. A pair of terminal lugs 4 extend from one side of the pair of current collecting plates 3. The pair of current collecting plates 3 are used to connect to external electrical devices to play a role in power exchange.

[0024] According to the instruction manual Figure 1-3 It can be seen that the above-mentioned single cell group 2 is composed of a pair of bipolar plates 203 and an ion exchange membrane 202. A sealing frame 201 is provided on the outside of the single cell group 2, and the ion exchange membrane 202 is fixedly installed by the sealing frame 201. At the same time, a pair of bipolar plates 203 are symmetrically arranged on both sides of the sealing frame 201. The pair of bipolar plates 203 and the sealing frame 201 fix the ion exchange membrane 202 in the middle to form a complete single cell group 2. Adjacent single cell groups 2 are closely arranged and sealed with each other by the sealing frames 201.

[0025] According to the instruction manual Figure 1-3 It can be seen that one of the symmetrical end plates 1 of the pair is provided with a plurality of jacks 5, in which a plurality of back-pull rods 6 are mounted, and the other symmetrical end plate 1 of the pair is provided with a plurality of back-pull holes 7 corresponding to the plurality of jacks 5;

[0026] During the specific implementation process, the sealing frame 201 is provided with a guide hole 8 corresponding to the socket 5 and the back-pull hole 7; the back-pull rod 6 passes through the socket 5, the guide hole 8 and the back-pull hole 7, and the back-pull rod 6 fixes and limits the symmetrical end plate 1 and the single battery group 2 respectively through the socket 5, the guide hole 8 and the back-pull hole 7, and then an integrated back-pull structure is provided on the outside of the back-pull hole 7 to back-pull and fix the back-pull rod 6. The integrated back-pull structure is used to back-pull and fix several back-pull rods 6, so that a pair of symmetrical ends relatively clamp the sealing frame 201 of several single battery groups 2 in the middle, and the integrated back-pull structure can quickly lock the battery stack structure.

[0027] As a preferred solution, further, the diameter of the reverse pull rod 6 matches that of the socket 5, the guide hole 8 and the reverse pull hole 7. A slot 9 is provided at one end of the reverse pull rod 6, and a circular limit seat 10 is provided at the other end of the reverse pull rod 6. The circular limit seat 10 is at the end of the reverse pull rod 6, and the circular limit seat 10 reverses the outside of the symmetrical end. The slot 9 at the other end of the reverse pull rod 6 is used to cooperate with the integrated reverse pull structure to complete the fixation of the reverse pull rod 6.

[0028] As a preferred solution, further, a reverse pull limit seat 11 is provided on the end of the reverse pull rod 6, and a limit spring 12 is also provided between the reverse pull limit seat 11 and the circular limit seat 10. The reverse pull limit seat 11 and the limit spring 12 together constitute a buffer device, and the reverse pull rod 6 is padded by the buffer device jointly constituted by the reverse pull limit seat 11 and the limit spring 12.

[0029] As a preferred solution, further, the pair of symmetrical end plates 1 are a pair of rectangular structured plates, and the outer dimensions of the sealing frame 201 match the dimensions of the symmetrical ends, thereby playing a role of position limiting protection.

[0030] As a preferred solution, further, according to the attached instructions Figure 1-3 It can be seen that the above-mentioned integrated reverse pull structure includes a reverse pull card strip 13, a reverse pull card strip 13 is provided on the outer side of the symmetrical end plate 1, a pair of adjusting screws 14 are symmetrically provided on both sides of the symmetrical end plate 1, a pair of reverse pull nuts 15 are symmetrically provided on the reverse pull card strip 13, the pair of reverse pull nuts 15 are threadedly connected to the pair of adjusting screws 14, a card slot 9 is provided at the end of the reverse pull rod 6, and a reverse pull piece 16 is provided on the reverse pull card strip 13 to match the card slot 9;

[0031] During the specific implementation process, a pair of counter-pull nuts 15 are threadedly engaged with a pair of adjusting screws 14. By rotating the adjusting screw 14, the counter-pull nut 15 can be engaged, and then the counter-pull nut 15 moves in a straight line under the action of the adjusting screw 14, thereby driving the counter-pull strip 13 to move. A counter-pull tab 16 is provided on the counter-pull strip 13 and inserted into the slot 9. The counter-pull tab 16 moves together with the counter-pull strip 13, so that the counter-pull strip 13 pushes the counter-pull rod 6 to move through the slot 9. Under the relative movement of the adjusting screw 14 and the counter-pull strip 13, the symmetrical end plates 1 on both sides relatively clamp multiple single battery groups 2.

[0032] From the above, it can be seen that the stack structure of the all-vanadium liquid flow battery adopts a ring-shaped back-pull rod 6 to limit the symmetrical end plate 1 and multiple single battery groups 2, and then an integrated back-pull structure is provided on the outside of the symmetrical end plate 1. The integrated back-pull structure can synchronously control the back-pull of multiple back-pull rods 6 to achieve the effect of quickly back-pull and fix the symmetrical end plate 1. During disassembly and assembly, the integrated back-pull structure can quickly complete the disassembly and assembly operation, which is convenient for the inspection and maintenance of the stack.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stack structure of an all-vanadium liquid flow battery, comprising a pair of symmetrical end plates (1), the pair of symmetrical end plates (1) being arranged opposite to each other, a plurality of single cell groups (2) being stacked between the pair of symmetrical end plates (1), the plurality of single cell groups (2) being arranged in a unidirectional linear array, characterized in that: A pair of current collecting plates (3) are symmetrically arranged on the inner sides of the pair of symmetrical end plates (1), and a pair of terminal pieces (4) extend from one side of the pair of current collecting plates (3); The single cell group (2) is composed of a pair of bipolar plates (203) and an ion exchange membrane (202), and a sealing frame (201) is provided outside the single cell group (2); A plurality of jacks (5) are provided on one of the symmetrical end plates (1) of the pair, and a plurality of back-pull rods (6) are installed in the jacks (5); a plurality of back-pull holes (7) are opened on the other of the symmetrical end plates (1) of the pair, corresponding to the plurality of jacks (5); The sealing frame (201), the insertion hole (5) and the reverse pulling hole (7) are provided with guide holes (8) correspondingly; The reverse pull rod (6) passes through the insertion hole (5), the guide hole (8) and the reverse pull hole (7); an integrated reverse pull structure is provided on the outer side of the reverse pull hole (7) to reversely pull and fix the reverse pull rod (6).

2. The stack structure of an all-vanadium redox flow battery according to claim 1, characterized in that: The diameters of the reverse pull rod (6) match those of the jack (5), the guide hole (8) and the reverse pull hole (7); one end of the reverse pull rod (6) is provided with a slot (9); and the other end of the reverse pull rod (6) is a circular limit seat (10).

3. The stack structure of an all-vanadium redox flow battery according to claim 2, characterized in that: The end of the reverse pull rod (6) is sleeved with a reverse pull limiting seat (11), and a limiting spring (12) is further provided between the reverse pull limiting seat (11) and the circular limiting seat (10).

4. The stack structure of an all-vanadium redox flow battery according to claim 3, characterized in that: The pair of symmetrical end plates (1) are a pair of rectangular structured plates, and the outer dimensions of the sealing frame (201) match the dimensions of the symmetrical end portions.

5. The stack structure of an all-vanadium redox flow battery according to claim 4, characterized in that: The integrated reverse pull structure includes a reverse pull strip (13), a reverse pull strip (13) is provided on the outer side of the symmetrical end plate (1), a pair of adjusting screws (14) are symmetrically provided on both sides of the symmetrical end plate (1), a pair of reverse pull nuts (15) are symmetrically provided on the reverse pull strip (13), the pair of reverse pull nuts (15) are threadedly connected to the pair of adjusting screws (14), a slot (9) is provided at the end of the reverse pull rod (6), and a reverse pull piece (16) is provided on the reverse pull strip (13) to match the slot (9).

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