Aluminum alkali liquid flow battery liquid box

Abstract

The utility model discloses an aluminum alkali liquid flow battery liquid box, which belongs to the technical field of batteries and comprises a box body, and a liquid inlet and a liquid outlet are formed on the box body. The partition plate is arranged in the box body and is suitable for dividing the interior of the box body into a first cavity and a second cavity, a via hole for communicating the first cavity with the second cavity is formed in the partition plate, the liquid inlet is communicated with the first cavity, and the liquid outlet is communicated with the second cavity; in the direction perpendicular to the extending direction of the partition plate, the projection of the liquid inlet and the projection of the liquid outlet are at least partially overlapped, and the liquid inlet and the liquid outlet are staggered with the via hole. According to the battery liquid tank designed by the utility model, the movement paths of electrolyte and precipitates in the liquid storage cavity are prolonged, so that the precipitates can be better precipitated in the liquid storage cavity, the discharge performance of the battery monomers is prevented from being influenced by the precipitates circulating to the battery monomers, and meanwhile, the precipitates can be prevented from precipitating in the pipeline; therefore, the pipeline is prevented from being blocked by sediments.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a liquid box for an aluminum-alkali liquid flow battery. Background Art

[0002] In the related art, in the aluminum alkaline liquid flow battery assembly, the chemical discharge formula is 4Al+3O2+6H2O+4KOH=4KAl(OH)4. In the prior art, a precipitate is generated during the discharge process. The precipitate cannot be effectively precipitated when flowing to the battery tank, causing the precipitate to flow back to the battery cell, resulting in poor discharge performance of the battery cell. At the same time, the precipitate will accumulate in the pipeline and block the pipeline, affecting the circulation efficiency of the electrolyte. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose an aluminum alkali liquid flow battery tank. The aluminum alkali liquid flow battery tank designed according to the utility model can extend the movement path of the electrolyte and the sediment in the liquid storage chamber, so that the sediment can be better precipitated in the liquid storage chamber, avoiding the sediment from circulating to the battery cell and affecting the discharge performance of the battery cell, and at the same time, it can prevent the sediment from precipitating in the pipeline, thereby preventing the sediment from clogging the pipeline.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] The utility model provides an aluminum alkali liquid flow battery liquid box, comprising: a box body, a liquid storage cavity is arranged in the box body, and a liquid inlet and a liquid outlet are formed on the box body; a partition, the partition is arranged in the liquid storage cavity and is suitable for dividing the liquid storage cavity into a first cavity and a second cavity, a through hole penetrating in the thickness direction is formed on the partition, the through hole is suitable for connecting the first cavity with the second cavity, the liquid inlet is connected with the first cavity, and the liquid outlet is connected with the second cavity; wherein the partition extends in the length and / or width direction, and in the direction perpendicular to the extension direction of the partition, the projections of the liquid inlet and the liquid outlet at least partially overlap, and the liquid inlet and the liquid outlet are respectively offset from the through hole.

[0006] According to the aluminum-alkali liquid flow battery tank of the utility model, by arranging a partition in the liquid storage chamber, and in a direction perpendicular to the extension direction of the partition, the projections of the liquid inlet and the liquid outlet at least partially overlap, and the liquid inlet and the liquid outlet are respectively offset from the via hole, thereby achieving the extension of the movement path of the electrolyte and the precipitate in the liquid storage chamber, so that the precipitate can be better precipitated in the liquid storage chamber, avoiding the precipitation from circulating to the battery cell and affecting the discharge performance of the battery cell, thereby improving the output power of the aluminum-alkali liquid flow battery assembly, and at the same time, through the above-mentioned arrangement, it is also possible to avoid the precipitation of the precipitate in the pipeline, thereby avoiding the precipitate from clogging the pipeline, thereby making the circulation effect of the electrolyte better, improving the working stability of the aluminum-alkali liquid flow battery assembly, and at the same time, the movement path of the electrolyte in the liquid storage chamber becomes longer, so that the electrolyte temperature in the liquid storage chamber is more uniform, thereby making the discharge performance of the battery cell more stable.

[0007] Furthermore, in the extension direction of the partition, the liquid inlet and the liquid outlet are both located at one end of the same side of the partition, and the through hole is located at the other end of the partition.

[0008] Furthermore, the via hole extends to two side walls of the liquid storage cavity in the height direction.

[0009] Furthermore, the liquid inlet is arranged at the top of the box body, and the liquid outlet is arranged between the top and the bottom of the box body.

[0010] Furthermore, the box body includes: a first box; a second box, the second box is arranged at one end of the first box in the length direction, and the first box and the second box together define the liquid storage cavity; wherein the partition is respectively connected to the first box and the second box.

[0011] Furthermore, a sealing protrusion is provided on a side of the first box body facing the second box body, and a sealing groove is provided on a side of the second box body facing the first box body, and the sealing protrusion is received in the sealing groove.

[0012] Furthermore, it also includes: a power element, which is connected to the box body and communicated with the liquid outlet, and the power element is suitable for driving the electrolyte in the second cavity to be discharged from the liquid outlet.

[0013] Furthermore, at least a portion of the box body is recessed toward the liquid storage cavity to form a recessed portion, and the liquid outlet is arranged at the bottom of the recessed portion.

[0014] Furthermore, the box body is also provided with a liquid filling port, and the liquid filling port is communicated with the second cavity.

[0015] Furthermore, the box body is also provided with a liquid discharge port, and the liquid discharge port is communicated with the second cavity.

[0016] Other advantages, objectives and features of the utility model will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model provides the following drawings for explanation:

[0018] Figure 1 It is a structural schematic diagram of the battery liquid tank of the utility model;

[0019] Figure 2 It is a cross-sectional view of the battery liquid tank of the utility model;

[0020] Figure 3 The utility model is a schematic diagram of the flow of the electrode liquid in the liquid storage chamber.

[0021] The following are marked in the accompanying drawings:

[0022] 1. Battery fluid tank;

[0023] 10. Box body; 11. First box; 111. Sealing convex block; 12. Second box; 13. Concave portion; 14. Liquid inlet; 15. Liquid outlet; 16. Liquid filling port; 17. Liquid discharge port; 181. First cavity; 182. Second cavity;

[0024] 20. partition; 21. via;

[0025] 30. Power element; 40. Drain plug. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0027] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other examples, in order to avoid obscuring the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0028] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1-Figure 3 As shown, the utility model provides an aluminum-alkali liquid flow battery tank 1, comprising: a tank body 10 and a partition 20, wherein a liquid storage cavity is arranged in the tank body 10, a liquid inlet 14 and a liquid outlet 15 are formed on the tank body 10, the partition 20 is arranged in the liquid storage cavity and is suitable for dividing the liquid storage cavity into a first cavity 181 and a second cavity 182, a through hole 21 penetrating in the thickness direction is formed on the partition 20, the through hole 21 is suitable for connecting the first cavity 181 with the second cavity 182, the liquid inlet 14 is connected with the first cavity 181, and the liquid outlet 15 is connected with the second cavity 182; wherein the partition 20 extends in the length and / or width direction, and in the direction perpendicular to the extension direction of the partition 20, the projections of the liquid inlet 14 and the liquid outlet 15 at least partially overlap, and the liquid inlet 14 and the liquid outlet 15 are respectively offset from the through hole 21.

[0032] In some embodiments, a liquid storage cavity is formed in the box body 10. The partition 20 is disposed in the liquid storage cavity and connected to the box body 10. The partition 20 can divide the liquid storage cavity into a first cavity 181 and a second cavity 182. A through hole 21 is further provided on the partition 20. The through hole 21 is adapted to communicate the first cavity 181 and the second cavity 182. An inlet 14 and an outlet 15 are provided on the box body 10. The inlet 14 communicates with the first cavity 181, and the outlet 15 communicates with the second cavity 182.

[0033] It can be understood that the partition 20 extends in the length direction and / or the width direction. And in the direction perpendicular to the extension direction of the partition 20, the projections of the inlet 14 and the outlet 15 at least partially overlap, and the inlet 14 and the outlet 15 are respectively offset from the through hole 21. Here, it can be that the partition 20 extends in the length direction, the inlet 14 and the outlet 15 are located on one side of the partition 20 in the width direction, and the through hole 21 is located on the other side of the partition 20 in the width direction; it can also be that the partition 20 extends in the width direction, the inlet 14 and the outlet 15 are located on one side of the partition 20 in the length direction, and the through hole 21 is located on the other side of the partition 20 in the width direction; it can also be that an angle is formed between the extension direction of the partition 20 and the length direction and the width direction respectively. In the direction perpendicular to the extension direction of the partition 20, the inlet 14 and the outlet 15 are located on one side of the partition 20, and the through hole 21 is located on the other side of the partition 20. There is no limitation here.

[0034] It is worth mentioning that in the above setting method, it is only necessary to satisfy that in the direction perpendicular to the extension direction of the partition 20, the projections of the inlet 14 and the outlet 15 at least partially overlap, and the inlet 14 and the outlet 15 are respectively offset from the through hole 21. In this way, the flow path of the electrolyte in the liquid storage cavity can be in a "C" shape, so as to extend the movement path of the electrolyte in the liquid storage cavity.

[0035] It is worth noting that when the aluminum-alkali liquid flow battery assembly is working, the battery liquid tank 1 of the present application is suitable for storing electrolyte, and the circulation of the electrolyte is: second cavity 182-liquid outlet 15-battery cell-liquid inlet 14-first cavity 181-via 21-second cavity 182. The electrolyte undergoes a chemical reaction and discharges in the battery cell. In the electrolyte discharged from the battery cell, due to the chemical reaction (the overall reaction formula is: 4Al+3O2+6H2O+4KOH=4KAl(OH)4), the chemical reaction will produce a small amount of precipitate. After the small amount of precipitate enters the first cavity 181 from the liquid inlet 14, the precipitate will continue to circulate with the electrolyte. Since the partition 20 in the battery liquid tank 1 of the present application separates the liquid storage cavity, the electrolyte is prevented from being discharged directly from the liquid outlet 15 after entering the liquid storage cavity, that is, the electrolyte and the precipitate will pass through the first cavity 181, the via 21 and the second cavity 182 in sequence before being discharged. The movement path of the electrolyte and the precipitate becomes longer, so that the precipitate can be better precipitated during the movement process, reducing the amount of precipitate circulating in the battery cell, thereby improving the discharge performance of the battery cell. At the same time, better precipitation of the precipitate can prevent the precipitate from accumulating in the pipeline and clogging the pipeline, so that the electrolyte is more effective in the above-mentioned cycle and the working stability of the aluminum-alkali liquid flow battery assembly is improved.

[0036] At the same time, since the movement path of the electrolyte in the liquid storage chamber becomes longer, the electrolyte that has just flowed back into the liquid storage chamber has a longer time to mix with the remaining electrolyte in the liquid storage chamber (the temperature of the electrolyte that has just flowed back into the liquid storage chamber is high, and the temperature of the remaining electrolyte in the liquid storage chamber is low), making the electrolyte temperature in the liquid storage chamber more uniform, thereby making the discharge performance of the battery cell more stable.

[0037] According to the aluminum-alkali liquid flow battery tank 1 of the utility model, by arranging a partition 20 in the liquid storage chamber, and in a direction perpendicular to the extension direction of the partition 20, the projections of the liquid inlet 14 and the liquid outlet 15 at least partially overlap, and the liquid inlet 14 and the liquid outlet 15 are respectively offset from the through hole 21, thereby achieving the extension of the movement path of the electrolyte and the precipitate in the liquid storage chamber, so that the precipitate can be better precipitated in the liquid storage chamber, avoiding the precipitation from circulating to the battery cell and affecting the discharge performance of the battery cell, thereby improving the output power of the aluminum-alkali liquid flow battery assembly, and at the same time, through the above-mentioned arrangement, it is also possible to avoid the precipitation of the precipitate in the pipeline, thereby avoiding the precipitate from clogging the pipeline, thereby making the circulation effect of the electrolyte better, improving the working stability of the aluminum-alkali liquid flow battery assembly, and at the same time, the movement path of the electrolyte in the liquid storage chamber becomes longer, so that the electrolyte temperature in the liquid storage chamber is more uniform, thereby making the discharge performance of the battery cell more stable.

[0038] Embodiment 2:

[0039] In this embodiment, based on the first embodiment, in the extension direction of the partition 20 , the liquid inlet 14 and the liquid outlet 15 are both located at one end of the same side of the partition 20 , and the through hole 21 is located at the other end of the partition 20 .

[0040] In some embodiments, the partition 20 extends in the length direction. In the width direction, the liquid inlet 14 and the liquid outlet 15 are both located at one end of the partition 20, and the via 21 is located at the other end of the partition 20. The flow path of the electrolyte in the liquid storage chamber is S, and the length dimension of the liquid storage chamber is L. Therefore, through the above setting, S≥2L can be satisfied, so that the movement path of the electrolyte in the liquid storage chamber can be longer, so that the precipitate can be better precipitated in the liquid storage chamber, further improving the discharge performance of the battery cell.

[0041] According to some embodiments of the utility model, the via 21 extends to the two side walls of the liquid storage cavity in the height direction. It can be understood that the via 21 penetrates the separator 20 in the thickness direction to connect the first cavity 181 and the second cavity 182. The via 21 penetrates the separator 20 in the height direction to increase the area of ​​the via 21, thereby increasing the flow area of ​​the electrolyte, reducing the flow resistance of the electrolyte, and improving the circulation efficiency of the electrolyte, thereby improving the discharge efficiency of the battery cell, and further improving the output power of the aluminum-alkali liquid flow battery assembly.

[0042] According to some embodiments of the present invention, the liquid inlet 14 is disposed at the top of the box body 10 , and the liquid outlet 15 is disposed between the top and the bottom of the box body 10 .

[0043] In some embodiments, the liquid inlet 14 is arranged at the top of the box body 10, so that the electrolyte can smoothly enter the first cavity 181, avoiding the formation of resistance to the electrolyte ready to enter through the liquid inlet 14 due to excessive electrolyte in the first cavity 181, thereby improving the circulation stability of the electrolyte; the liquid outlet 15 is arranged between the top and the bottom of the box body 10, so that the liquid outlet 15 and the bottom of the liquid storage cavity are spaced apart, avoiding the sediment that has been precipitated in the second cavity 182 from entering the liquid outlet 15, thereby avoiding the sediment from circulating to the battery cell through the liquid outlet 15, thereby improving the discharge performance of the battery cell.

[0044] It is worth noting that the liquid inlet 14 is arranged at the top of the box body 10, and the liquid outlet 15 is arranged between the top and the bottom of the box body 10, so that there is a height difference between the liquid inlet 14 and the liquid outlet 15. Such a height difference design helps to utilize gravity or pressure difference to drive the flow of electrolyte, thereby improving the circulation efficiency of the electrolyte and thus improving the discharge efficiency of the battery cell.

[0045] Embodiment three:

[0046] In this embodiment, based on the first embodiment, the box body 10 includes: a first box body 11 and a second box body 12, the second box body 12 is arranged at one end of the first box body 11 in the length direction, and the first box body 11 and the second box body 12 jointly define the liquid storage cavity; wherein the partition 20 is respectively connected to the first box body 11 and the second box body 12.

[0047] In some embodiments, the first box body 11 and the second box body 12 are arranged sequentially in the length direction, the first box body 11 is formed with a first opening facing the second cavity 182, the second box body 12 is formed with a second opening facing the first box body 11, the first opening and the second opening are opposite to each other and connected to close the liquid storage cavity, the partition 20 extends in the length direction, and the partition 20 is arranged in the liquid storage cavity.

[0048] Therefore, the above arrangement can divide the box body 10 into a first box body 11 and a second box body 12. The structure of the first box body 11, the second box body 12 and the partition 20 is simpler than that of the battery liquid tank 1, which reduces the manufacturing difficulty of the battery liquid tank 1 and improves the production efficiency of the battery liquid tank 1.

[0049] Embodiment 4:

[0050] In this embodiment, based on the third embodiment, a sealing protrusion 111 is provided on a side of the first box body 11 facing the second box body 12 , and a sealing groove is provided on a side of the second box body 12 facing the first box body 11 , and the sealing protrusion 111 is received in the sealing groove.

[0051] In some embodiments, the first box body 11 is provided with a sealing protrusion 111, which is arranged around the outer periphery of the first opening, and the second box body 12 is provided with a sealing groove, which is arranged around the outer periphery of the second opening. Therefore, when the first box body 11 is connected to the second box body 12, the sealing protrusion 111 is accommodated in the sealing groove, and the outer peripheral wall of the sealing protrusion 111 abuts against the inner peripheral wall of the sealing groove to form a seal for the liquid storage chamber, thereby improving the sealing effect of the liquid storage chamber.

[0052] It is worth noting that a sealing layer is provided between the sealing protrusion 111 and the sealing groove, and the sealing layer can be a sealing strip or corrosion-resistant glue, etc., which is not limited here. The sealing layer can further improve the sealing effect of the liquid storage cavity.

[0053] Embodiment five:

[0054] In this embodiment, based on the first embodiment, the battery liquid tank 1 further includes: a power element 30 , which is connected to the tank body 10 and communicates with the liquid outlet 15 , and is suitable for driving the electrolyte in the second cavity 182 to be discharged from the liquid outlet 15 .

[0055] In some embodiments, the power element 30 can be configured as a water pump, and the power element 30 can drive the electrolyte in the second cavity 182 to be discharged through the liquid outlet 15, thereby driving the electrolyte to enter the battery cell, thereby the power element 30 can ensure the circulation capacity of the electrolyte, thereby ensuring the discharge stability of the battery cell. It is worth noting that the power element 30 of the present application is directly arranged at the liquid outlet 15, which can reduce the layout of the pipeline, reduce the production cost, and reduce the volume of the aluminum-alkali liquid flow battery assembly, which facilitates the installation of the aluminum-alkali liquid flow battery assembly. At the same time, the reduction of pipelines can reduce the leakage points, thereby reducing the leakage risk of the aluminum-alkali liquid flow battery assembly.

[0056] According to some embodiments of the present invention, at least a portion of the box body 10 is recessed toward the liquid storage cavity to form a recessed portion 13 , and the liquid outlet 15 is disposed at the bottom of the recessed portion 13 .

[0057] In some embodiments, a recessed portion 13 is formed on the box body 10, and the recessed portion 13 is recessed toward the liquid storage chamber. A liquid outlet 15 is provided at the bottom of the recessed portion 13, and the power element 30 is provided in the recessed portion 13 and connected with the liquid outlet 15. Thus, the setting of the recessed portion 13 can form an installation position for the power element 30, thereby preventing the power element 30 from protruding from the outer peripheral surface of the box body 10, thereby preventing the power element 30 from being damaged when the battery liquid tank 1 is hit, thereby improving the protection of the power element 30.

[0058] Embodiment six:

[0059] In this embodiment, on the basis of the first embodiment, a liquid filling port 16 is further provided on the box body 10, and the liquid filling port 16 is connected to the second cavity 182. It can be understood that the box body 10 is further provided with a liquid filling port 16, and after the battery liquid tank 1, the pipeline and the battery cell are connected, the operator can add electrolyte to the liquid storage cavity through the liquid filling port 16, thereby, the electrolyte is added after the battery liquid tank 1 is assembled, which can improve the installation efficiency of the battery liquid tank 1. At the same time, when the electrolyte is consumed to a certain level, the operator can replenish the electrolyte into the liquid storage cavity through the liquid filling port 16.

[0060] According to some embodiments of the present invention, a drain port 17 is further provided on the box body 10, and the drain port 17 is communicated with the second cavity 182. It is understandable that when the performance of the electrolyte in the liquid storage cavity is exhausted, the electrolyte in the liquid storage cavity can be discharged through the drain port 17, which is convenient for regular cleaning or replacement of the electrolyte, and ensures the stability and long-term performance of the aluminum alkaline liquid flow battery assembly.

[0061] It is worth mentioning that the battery liquid tank 1 also includes: a drain plug 40, the inner peripheral wall of the drain port 17 is provided with a first thread, and at least part of the outer peripheral wall of the drain plug 40 is provided with a second thread, and the first thread and the second thread cooperate to connect the drain plug 40 to the box body. Thus, the drain plug 40 seals the drain port 17 by a threaded sealing method, thereby ensuring the sealing effect of the drain port 17, and the disassembly and assembly of the drain plug 40 and the drain port 17 are more convenient, thereby improving the convenience of using the drain port 17.

[0062] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. An aluminum alkaline liquid flow battery tank, characterized in that: include: A box body (10), wherein a liquid storage cavity is provided in the box body (10), and a liquid inlet (14) and a liquid outlet (15) are formed on the box body (10); a partition (20), the partition (20) being arranged in the liquid storage cavity and being suitable for dividing the liquid storage cavity into a first cavity (181) and a second cavity (182); a through hole (21) penetrating in the thickness direction is formed on the partition (20); the through hole (21) being suitable for connecting the first cavity (181) with the second cavity (182); the liquid inlet (14) being connected with the first cavity (181); and the liquid outlet (15) being connected with the second cavity (182); wherein The partition (20) extends in the length and / or width direction, and in a direction perpendicular to the extension direction of the partition (20), the projections of the liquid inlet (14) and the liquid outlet (15) at least partially overlap, and the liquid inlet (14) and the liquid outlet (15) are respectively offset from the via hole (21).

2. The aluminum-alkali liquid flow battery tank according to claim 1, characterized in that: In the extension direction of the partition (20), the liquid inlet (14) and the liquid outlet (15) are both located at one end of the same side of the partition (20), and the through hole (21) is located at the other end of the partition (20).

3. The aluminum-alkali liquid flow battery tank according to claim 2, characterized in that: The through hole (21) extends to two side walls of the liquid storage chamber in the height direction.

4. The aluminum-alkali liquid flow battery tank according to claim 3, characterized in that: The liquid inlet (14) is arranged at the top of the box body (10), and the liquid outlet (15) is arranged between the top and the bottom of the box body (10).

5. The aluminum-alkali liquid flow battery tank according to claim 1, characterized in that: The box body (10) comprises: A first housing (11); a second box body (12), wherein the second box body (12) is arranged at one end of the first box body (11) in the length direction, and the first box body (11) and the second box body (12) jointly define the liquid storage cavity; wherein The partition plate (20) is connected to the first box body (11) and the second box body (12) respectively.

6. The aluminum-alkali liquid flow battery tank according to claim 5, characterized in that: A sealing protrusion (111) is provided on a side of the first box body (11) facing the second box body (12), and a sealing groove is provided on a side of the second box body (12) facing the first box body (11), wherein the sealing protrusion (111) is received in the sealing groove.

7. The aluminum-alkali liquid flow battery tank according to claim 1, characterized in that: Also includes: A power element (30), the power element (30) is connected to the box body (10) and communicates with the liquid outlet (15), and the power element (30) is suitable for driving the electrolyte in the second cavity (182) to be discharged from the liquid outlet (15).

8. The aluminum-alkali liquid flow battery tank according to claim 7, characterized in that: At least a portion of the box body (10) is recessed toward the liquid storage cavity to form a recessed portion (13), and the liquid outlet (15) is arranged at the bottom of the recessed portion (13).

9. The aluminum-alkali liquid flow battery tank according to claim 1, characterized in that: The box body (10) is also provided with a liquid filling port (16), and the liquid filling port (16) is in communication with the second cavity (182).

10. The aluminum-alkali liquid flow battery tank according to claim 1, characterized in that: The box body (10) is also provided with a liquid discharge port (17), and the liquid discharge port (17) is in communication with the second cavity (182).

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