Electric pile of flow battery

Abstract

The utility model relates to the technical field of flow batteries, and discloses an electric pile of a flow battery, which comprises a stack body, an end plate group, a fastening assembly and a plurality of guide rods, a guide groove is formed in the side face of the stacking body along the path where the guide rod is located, a limiting hole is formed in the first end plate along the path where the guide rod is located, and a limiting groove is formed in the second end plate along the path where the guide rod is located. Compared with the prior art, the galvanic pile of the flow battery has the following advantages and effects that the guide groove is formed in the side wall of the stack body, the limiting hole is formed in the first end plate, and the limiting groove is formed in the second end plate, so that a guide rod can be put into the guide groove and the limiting groove during assembly, and the flow battery can be assembled conveniently; and then the stacking body is pushed out towards the position where the first end plate is located until the guide rod penetrates through the limiting hole, then the fastening assembly is used for fastening the first end plate, the stacking body and the second end plate, and meanwhile the fastening assembly also fixes the position of the guide rod.

Description

Technical Field

[0001] The present application relates to the technical field of liquid flow batteries, and in particular to a liquid flow battery stack. Background Art

[0002] At present, liquid flow batteries consist of three parts: a battery stack, a liquid storage tank for transporting electrolyte, and a control system. The battery stack is the main place for charging and discharging of liquid flow batteries. With the development of liquid flow batteries, the structural forms of battery stacks have also become diverse, but its main structure is still a stack of multiple single cell sheets stacked together, and the stacking direction of the single cell sheet is the stacking direction of the stack. The flow channels between multiple single cell sheets are interconnected, and electrolyte is supplied to all single cell sheets through a certain device. Finally, two end plates are used to press all single cell sheets into a whole.

[0003] Because the single cell sheets are arranged in pieces, it is necessary to use a guide device similar to a guide rod to adjust the direction of the end plate clamping force during installation to avoid the sideways sliding of multiple single cell sheets due to incorrect clamping force direction. In the related art, holes are opened on the end plates, and then the guide rods are inserted into the holes on the two end plates to achieve guidance. However, the stacking height of the battery stack is generally between one and two meters, and the various parts of the battery stack are consumable parts, so workers need to be very careful to pass the guide rod from the top end plate to the bottom end plate, which is very inconvenient. At the same time, considering the strength requirements of the guide rod, it uses more materials and is heavier, which makes the workers consume more physical strength and the installation process is time-consuming and labor-intensive. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of the present application is to provide a flow battery stack to facilitate the assembly of the stack.

[0005] In order to achieve the above objectives, on the one hand, the technical solutions adopted are:

[0006] The present application provides a flow battery stack, comprising a stack, an end plate group, a fastening assembly and a plurality of guide rods;

[0007] The end plate group comprises a first end plate and a second end plate respectively arranged at two end surfaces of the stacking body in the stacking direction, each of the guide rods passes through the first end plate and the second end plate in the stacking direction, and the fastening assembly is arranged at both ends of the guide rod and is used to fasten the first end plate, the stacking body and the second end plate;

[0008] The stacking body side surface is provided with a guide groove along the path where the guide rod is located, the first end plate is provided with a limit hole along the path where the guide rod is located, and the second end plate is provided with a limit groove along the path where the guide rod is located.

[0009] By adopting the above technical solution, there is no need to insert the guide rod from the top during installation. Instead, the guide rod can be placed into the guide groove and the limit groove from the side and then passed upward through the guide hole. The movement amplitude is small and the alignment is convenient during the installation process, which saves the workers' physical strength and improves the workers' installation efficiency.

[0010] Optionally, the stack includes at least one single battery pack;

[0011] Each of the single cell groups comprises a plurality of single cell sheets and two liquid guide plates, the plurality of single cell sheets are stacked on each other, the liquid guide plates are arranged at both ends of a whole body formed by the plurality of single cell sheets stacked on each other, and the stacking direction of the stack is the stacking direction of the plurality of single cell sheets;

[0012] The guide groove is arranged on the edge of the liquid guide plate.

[0013] By adopting the above technical solution, the stacked bodies do not contact

[0014] Optionally, a support boss is provided on the same side of all the single cell sheets, the support boss is located beside a portion of the guide rods, and the support boss is provided with a support groove along the path where the guide rods are located.

[0015] By adopting the above technical solution, the support groove can assist in guiding during installation, and the guide rod can also be used to determine whether the single battery cells are neatly stacked. When the battery stack is used, the side with the support groove can face the ground, so that when the single battery cell sinks due to gravity, it can be supported by the guide rod to prevent the middle of the stack from bending.

[0016] Optionally, the fastening assembly includes:

[0017] An elastic pressing member, which is arranged between the guide rod and the first end plate and is located at an end of the guide rod extending out of the first end plate;

[0018] The anti-twist fastener is arranged between the guide rod and the second end plate and close to a side of the second end plate away from the first end plate.

[0019] By adopting the above technical solution, a clamping force is provided between the elastic clamping member and the first end plate, and the anti-twist fastener is used to prevent the guide rod from slipping out of the limiting groove of the second end plate, while the guide rod transmits the clamping force.

[0020] Optionally, the elastic pressing member includes:

[0021] An end plate mounted on an end surface of the guide rod extending out of one end of the first end plate;

[0022] The fastening spring is sleeved on the guide rod, and one end of the fastening spring abuts against the end plate, and the other end abuts against the first end plate.

[0023] By adopting the above technical solution, the end panel is used as the intermediate component connecting the fastening spring and the guide rod, which effectively reduces the difficulty of installation and improves the installation efficiency.

[0024] Optionally, the end panel and the guide rod are connected via threads.

[0025] By adopting the above technical solution, the position of the end panel can be adjusted. The two ends of the fastening spring are respectively connected to the end panel and the first end plate. Adjusting the position of the end panel is equivalent to adjusting the degree of compression of the fastening spring, so the clamping force can be adjusted by screwing in or out of the end panel. It is convenient to repair the fastening spring when it is loose after the battery stack has been used for a long time, and it is also convenient to replace the fastening spring when it is damaged.

[0026] Optionally, the second end plate further includes a limiting groove;

[0027] One end of the guide rod close to the second end plate is provided with a limiting piece with the same shape as the limiting groove.

[0028] By adopting the above technical solution, the side of the guide rod close to the second end plate will not move at will. In this way, during installation, workers only need to embed the limit plate into the limit groove, and there is no need to pay attention to whether both ends of the guide rod are in a normal state at the same time, thereby improving the installation efficiency.

[0029] Optionally, the guide rod comprises a body, a connecting rod arranged at one end of the body and an end cap threadedly connected to the connecting rod, and the outer diameter of the connecting rod is smaller than that of the body and the connecting rod is located at one end of the body close to the second end plate;

[0030] The limiting piece is sleeved on the connecting rod, and the end cap abuts against the limiting piece.

[0031] By adopting the above technical solution, the end cap and the connecting rod can be disassembled, so that the limiting piece can be easily taken out and replaced. On the other hand, the pressing force of the end cap can also make the limiting piece fixedly connected to the guide rod to a certain extent.

[0032] Optionally, the limiting piece and the guide rod are fixedly connected;

[0033] The limiting groove is not circular.

[0034] By adopting the above technical solution, as long as the above-mentioned limit groove is not circular, there will be certain corners to limit the rotation of the limit plate, and the limit plate can further limit the rotation of the guide rod, thereby preventing unnecessary twisting of the guide rod during the installation and use of the battery stack, thereby preventing damage to the elastic clamping piece.

[0035] Optionally, both the first end plate and the second end plate are provided with lifting holes for installing a lifting device.

[0036] By adopting the above technical solution, a lifting device installation site such as a lifting ring can be provided, which facilitates the use of a crane to lift the battery stack when the liquid flow battery is installed.

[0037] The beneficial effects of the technical solution provided by this application include:

[0038] The flow battery stack of the present application has guide grooves on the side walls of the stack, limiting holes on the first end plate, and limiting grooves on the second end plate. During assembly, the guide rod can be placed in the guide grooves and the limiting grooves, and then pushed toward the position of the first end plate until the guide rod passes through the limiting hole. The first end plate, the stack, and the second end plate are then fastened using a fastening assembly, and the position of the guide rod is also fixed by the fastening assembly.

[0039] During the installation process of the present application, it is only necessary to push the guide rod into the limiting groove and the guide groove from the side, and then pass it through the limiting hole longitudinally. The movement amplitude is very small, and there is no need to slowly guide the guide rod from a high place through the two end plates as in the related technology. This saves time and effort and improves production and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 This is a front view of an embodiment of the present application.

[0042] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at point A in the middle.

[0043] Figure 3 for Figure 1 Schematic diagram of the structure from another perspective.

[0044] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0045] Figure 5 It is a longitudinal cross-sectional view along the stacking direction in this application.

[0046] Figure 6 for Figure 5 Enlarged schematic diagram of the structure at C in the middle.

[0047] Figure 7 It is a cross-sectional view along the plane where the single battery cell is located.

[0048] Reference numerals:

[0049] 1. Stacking body; 11. Guide groove; 12. Single battery pack; 121. Single battery sheet; 1211. Support boss; 122. Liquid guide plate; 2. End plate group; 21. First end plate; 211. Limiting hole; 22. Second end plate; 221. Limiting groove; 222. Limiting slot; 23. Hanging hole; 3. Fastening assembly; 31. Elastic clamping member; 311. End panel; 312. Fastening spring; 32. Anti-twist fastener; 321. Limiting plate; 4. Guide rod; 41. Main body; 42. Connecting rod; 43. End cap. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] The present application provides an embodiment of a flow battery stack, which includes a stack 1 , an end plate group 2 , a fastening assembly 3 and a plurality of guide rods 4 .

[0052] Among them can be seen Figure 1 The stack 1 is the main body of the battery reaction, and the end plate assembly 2 is a component for pressing and fastening the stack 1, including a first end plate 21 and a second end plate 22. Figure 1 In the direction shown, the first end plate 21 is at the top, the second end plate 22 is placed under the stack 1, the guide rod 4 surrounds the stack 1, and the two ends of the guide rod 4 use the fastening assembly 3 to apply fastening force to the first end plate 21 and the second end plate 22. The guide rod 4 is used to indicate whether the first end plate 21, the second end plate 22 and the stack 1 are properly matched, and also serves as a component for transmitting the pressing force generated by the fastening assembly 3.

[0053] See also Figure 1 and Figure 2 A guide groove 11 is provided on the side of the stacking body 1, a limiting hole 211 is provided on the first end plate 21, and a limiting groove 221 is provided on the side of the second end plate 22. The positions of the guide groove 11, the limiting hole 211 and the limiting groove 221 are all confirmed according to the position where the guide rod 4 is to be installed.

[0054] During the installation process, the guide rod 4 is first pushed into the limiting groove 221 and the guide groove 11 from the side, and then pushed upward to pass the guide rod 4 through the limiting hole 211 until the guide rod 4 extends to a length sufficient for the fastening assembly 3 to be installed. Finally, the fastening assembly 3 is installed at both ends of the guide rod 4, and the fastening assembly 3 is used to apply a fastening force to the first end plate 21 and the second end plate 22, and the guide rod 4 is fixed by the fastening assembly 3.

[0055] See also Figure 1 , the stacking body 1 is composed of a plurality of groups of single cell sheets 121, each group of single cell sheets 121 is composed of a plurality of stacked single cell sheets 121, and two liquid guide plates 122 are arranged on both sides, and the liquid guide plates 122 are used to control the electrolyte to enter and exit the single cell sheets 121. In some embodiments, the stacking body 1 may have only one group of single cell sheets 121, but in other cases, especially considering the case where the required power is large, the required number of single cell sheets 121 is large, so the flow resistance is large. At this time, the stacking body 1 will be divided into a plurality of groups of single cell sheets 121, and the liquid guide plates 122 are not shared between the groups of single cell sheets 121, so that the required pressure can be reduced. At this time, the liquid guide plate 122 mainly blocks the installation of the guide rod 4, so the guide groove 11 is set at the edge of the liquid guide plate 122.

[0056] On the other hand, see Figure 1 , Figure 2 and Figure 7 A support boss 1211 is provided on one side of each single cell sheet 121. A support groove is provided in the support boss 1211. The guide rod 4 can also be placed in the support groove. Figure 7 Taking the direction shown as an example, the support boss 1211 is arranged on the downward side of the single cell sheet 121, and the middle part is grooved outward to form a support groove. When all the single cells are stacked up, a long groove structure is formed, and the guide rod 4 is just embedded in it. In this way, on the one hand, the structure composed of multiple support grooves can play a guiding role and guide the installation of the guide rod 4. On the other hand, when the battery stack is installed, the side with the support groove can face downward, so that the guide rod 4 can also play a supporting role to prevent the middle part of the battery stack from bending downward under the action of gravity. It should be noted that in the related art, the single cell sheet 121 has a variety of complex structures such as flow channels and pole pieces, but the internal structure of the single cell sheet 121 is irrelevant to the technical effect achieved by the present application. For the convenience of display, the relevant structure is omitted in the drawings of the present application.

[0057] See also Figure 5 The fastening assembly 3 is mainly divided into two parts, including an elastic pressing member 31 and an anti-twist fastener 32 , and the elastic pressing member 31 and the anti-twist fastener 32 are respectively installed at both ends of the guide rod 4 .

[0058] The elastic pressing member 31 is installed between the guide rod 4 and the first end plate 21 and is located at the end of the guide rod 4 extending out of the first end plate 21. The elastic pressing member 31 is used to provide a pressing force. Figure 1 The elastic pressing member 31 includes an end panel 311 and a fastening spring 312. The end panel 311 is installed on the end surface of the guide rod 4 extending out of the first end plate 21. In this embodiment, the end panel 311 is a disc-shaped structure. The function of the end panel 311 is to provide a support surface for the fastening spring 312. Therefore, in other optional embodiments, it can also be other shapes such as square. It is only necessary that the side of the end panel 311 facing the first end plate 21 is flat. The connection between the end panel 311 and the guide rod 4 only needs to be fixed to each other under certain conditions. Therefore, some other optional embodiments also have a snap connection, or are welded to the guide rod 4 after the guide rod 4 is installed. In this embodiment, the end panel 311 and the guide rod 4 are connected by threads, so that the position of the end panel 311 can be easily adjusted, and then the pressing force of the fastening spring 312 can be adjusted, so as to maintain the battery stack after the battery stack is used for a long time. The end panel 311 can also be removed and replaced with a new fastening spring 312 after the fastening spring 312 is damaged.

[0059] One end of the fastening spring 312 abuts against the end plate 311, and the other end abuts against the first end plate 21. After installation, the fastening spring 312 is in a compressed state, and uses elastic force to provide a clamping force. It should be noted that the spring here is a spring in a broad sense, not limited to the coil spring shown in the drawings, and in some other optional embodiments, it can also be a leaf spring, an air spring, or other types of components that provide elastic force.

[0060] The anti-twist fastener 32 is mainly used in conjunction with the spring clamp to provide a clamping force away from the spring fastener. In some optional embodiments, a limit plate with an outer diameter larger than the inner diameter of the limit groove 221 can be provided on the guide rod 4, and the limit plate can be clamped on one side of the second end plate 22, thereby limiting the movement of the guide rod 4 and providing a basis for the elastic clamp 31. In this embodiment, see Figure 4 , Figure 5 and Figure 6 The second end plate 22 is mainly used to limit the movement. A limiting groove 222 is provided on the second end plate 22, and a limiting piece 321 having the same shape as the limiting groove 222 is provided on the guide rod 4. Figure 5 The direction shown in the figure is used for explanation. After the limiting piece 321 is inserted into the limiting groove 222, except for pushing the limiting piece 321 downward out of the limiting groove 222, the movement in other directions is completely restricted. With this design, during installation, the worker does not need to press the guide rod 4 into the limiting groove 221 all the time, which saves the worker's physical strength.

[0061] In some other optional embodiments, there are multiple ways of connecting the limit plate 321 and the guide rod 4, such as welding, threaded connection or clamping. It is only necessary that the limit plate 321 and the guide rod 4 can be fixed to each other under certain conditions to prevent the guide rod 4 from flying out of the first end plate 21 under the thrust of the spring clamp. In this embodiment, the limit plate 321 is pressed on the guide rod 4 by a nut. In order to adapt to this installation method, the guide rod 4 is further improved. The guide rod 4 includes a body 41, a connecting rod 42 and an end cap 43. The outer diameter of the connecting rod 42 is smaller than the body 41. In this way, the limit plate 321 can be sleeved on the connecting rod 42, and then the limit plate 321 is pressed on the end face between the connecting rod 42 and the body 41 by the end cap 43. The limit groove 222 is generally different in shape from the limit groove 221, and a certain space is left for the limit plate 321 to be clamped in to play a limiting role. Those skilled in the art can set it arbitrarily according to actual needs. In some optional embodiments, the shape of the limiting groove 222 is also limited, requiring that the limiting groove 222 is not circular. Figure 4 The limiting groove 222 is a rounded rectangle, so that the two straight edges can limit the rotation of the limiting piece 321, and after the limiting piece 321 is fixedly connected to the guide rod 4, the rotation of the guide rod 4 can also be limited accordingly. For example, in this embodiment, since the end cap 43 presses the limiting piece 321, by means of the friction between the end cap 43 and the limiting piece 321, and the end surface of the body 41 and the limiting piece 321, when the limiting piece 321 is restricted from rotating, the guide rod 4 does not rotate as a whole. This ensures that during the installation and use of the battery stack, the elastic clamping member 31 will not be damaged or the clamping force will not be changed due to the rotation of the guide rod 4.

[0062] Small stacks usually weigh hundreds of kilograms, and large stacks usually weigh tons, which makes installation very inconvenient. Figure 4 The first end plate 21 and the second end plate 22 are both provided with a hanging hole 23 for installing a hanging device. Figure 4 The direction meter shown in the figure has hanging holes 23 respectively arranged on the ground and right side of the second end plate 22, and the first end plate 21 is symmetrically arranged with the second end plate 22. In the present application, the hanging tool is a hanging ring with a threaded pile, and the hanging ring is threadedly connected with the hanging hole 23 through the threaded pile, so that the crane can conveniently lift the battery stack for installation.

[0063] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0064] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A flow battery stack, It is characterized in that It comprises a stacking body (1), an end plate group (2), a fastening assembly (3) and a plurality of guide rods (4); The end plate group (2) comprises a first end plate (21) and a second end plate (22) respectively arranged on the two end surfaces of the stacking body (1) along the stacking direction, each of the guide rods (4) passes through the first end plate (21) and the second end plate (22) along the stacking direction, and the fastening assembly (3) is arranged at both ends of the guide rod (4) and is used to fasten the first end plate (21), the stacking body (1) and the second end plate (22); The side surface of the stacking body (1) is provided with a guide groove (11) along the path where the guide rod (4) is located, the first end plate (21) is provided with a limit hole (211) along the path where the guide rod (4) is located, and the second end plate (22) is provided with a limit groove (221) along the path where the guide rod (4) is located.

2. A flow battery stack according to claim 1, It is characterized in that The stack (1) comprises at least one battery pack (12); Each of the single cell groups (12) comprises a plurality of single cell sheets (121) and two liquid guide plates (122), the plurality of single cell sheets (121) are stacked on each other, the liquid guide plates (122) are arranged at both ends of a whole formed by the plurality of single cell sheets (121) stacked on each other, and the stacking direction of the stack (1) is the stacking direction of the plurality of single cell sheets (121); The guide groove (11) is arranged on the edge of the liquid guide plate (122).

3. A flow battery stack according to claim 2, It is characterized in that A support boss (1211) is provided on the same side of all the single cell sheets (121), the support boss (1211) is located beside a portion of the guide rod (4), and the support boss (1211) is provided with a support groove along the path where the guide rod (4) is located.

4. A flow battery stack according to claim 1, It is characterized in that The fastening assembly (3) comprises: An elastic pressing member (31) is arranged between the guide rod (4) and the first end plate (21), and is located at an end of the guide rod (4) extending out of the first end plate (21); An anti-twist fastener (32) is arranged between the guide rod (4) and the second end plate (22), and is close to a side of the second end plate (22) away from the first end plate (21).

5. A flow battery stack according to claim 4, It is characterized in that The elastic pressing member (31) comprises: An end panel (311) mounted on an end surface of the guide rod (4) extending out of one end of the first end panel (21); The fastening spring (312) is sleeved on the guide rod (4), and one end of the fastening spring abuts against the end plate (311) and the other end of the fastening spring abuts against the first end plate (21).

6. A flow battery stack according to claim 5, It is characterized in that The end panel (311) and the guide rod (4) are connected via threads.

7. A flow battery stack according to claim 4, It is characterized in that The second end plate (22) further comprises a limiting groove (222); One end of the guide rod (4) close to the second end plate (22) is provided with a limiting piece (321) having the same shape as the limiting groove (222).

8. A flow battery stack according to claim 7, It is characterized in that The guide rod (4) comprises a body (41), a connecting rod (42) arranged at one end of the body (41), and an end cap (43) threadedly connected to the connecting rod (42), wherein the outer diameter of the connecting rod (42) is smaller than that of the body (41) and the connecting rod (42) is located at one end of the body (41) close to the second end plate (22); The limiting plate (321) is sleeved on the connecting rod (42), and the end cap (43) abuts against the limiting plate (321).

9. A flow battery stack according to claim 7, It is characterized in that The limiting piece (321) and the guide rod (4) are fixedly connected; The limiting groove (222) is not circular.

10. The flow battery stack according to claim 1, It is characterized in that The first end plate (21) and the second end plate (22) are both provided with hanging holes (23) for installing hanging tools.

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