Pipeline assembly, electrolyte storage tank and flow battery

Abstract

The utility model relates to a pipeline assembly, an electrolyte storage tank and a flow battery, the pipeline assembly is used for the electrolyte storage tank of the flow battery, and the pipeline assembly comprises a plurality of branch pipe groups and connecting pipes. The multiple branch pipe sets are arranged at intervals in the first direction, each branch pipe set comprises multiple branch pipes, each branch pipe extends in the direction intersecting with the first direction, the axes of the multiple branch pipes in the same branch pipe set are located in the same plane, and multiple open holes are formed in each branch pipe. The connecting pipe extends in the first direction and communicates with the branch pipes in the branch pipe sets at the same time. The first direction intersects with the plane where the axes of the branch pipes in the same branch pipe set are located. The problems that the electrolyte in the electrolyte storage tank is long in mixing time and uneven in mixing can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of liquid flow batteries, and in particular to a pipeline assembly, an electrolyte storage tank and a liquid flow battery. Background Art

[0002] During the charging and discharging process of flow batteries, the charged or discharged electrolyte needs to flow back into the electrolyte storage tank and mix with the original electrolyte in the electrolyte storage tank. However, in the current electrolyte storage tank, this mixing process has problems such as long mixing time and uneven mixing. Summary of the invention

[0003] Based on this, it is necessary to provide a pipeline assembly, an electrolyte storage tank and a flow battery to address the problems of long mixing time and uneven mixing of the electrolyte in the electrolyte storage tank.

[0004] According to one aspect of the present application, a pipeline assembly is provided, which is used for an electrolyte storage tank of a liquid flow battery, and the pipeline assembly includes: a plurality of branch pipe groups, the plurality of branch pipe groups are arranged at intervals along a first direction, each of the branch pipe groups includes a plurality of branch tubes, each of the branch tubes extends along a direction intersecting the first direction, the axes of the plurality of branch tubes in the same branch pipe group are located in the same plane, and each of the branch tubes is provided with a plurality of openings; and a connecting pipe, which extends along the first direction and is simultaneously connected to the plurality of branch tubes in the plurality of branch pipe groups; wherein the first direction intersects with the plane where the axes of the plurality of branch tubes in the same branch pipe group are located.

[0005] The present application provides a pipeline assembly for an electrolyte storage tank of a flow battery, including multiple branch pipe groups and connecting pipes that simultaneously connect multiple branch pipes in multiple branch pipe groups. The axes of multiple branch pipes in the same branch pipe group are located in the same plane, and the extension direction of the branch pipe intersects with the arrangement direction of the multiple branch pipe groups, and the arrangement direction of the multiple branch pipe groups intersects with the plane where the axes of the multiple branch pipes in the same branch pipe group are located. Further, multiple openings are provided on each branch pipe. In this way, the multiple openings are relatively evenly distributed in the plane where the branch pipe group is located and in the arrangement direction of the multiple branch pipe groups. Based on this, when the pipeline assembly is applied to an electrolyte storage tank, during the charge and discharge process of the flow battery, the electrolyte that has been charged or discharged can flow out through multiple openings evenly distributed in three-dimensional space, and quickly and fully mix with the original electrolyte in the storage tank, so that the electrolyte concentration inside the entire storage tank remains balanced.

[0006] In some embodiments, the plurality of openings on the branch tube are arranged in a row along an extension direction of the branch tube.

[0007] In some embodiments, the branch pipe group further includes a transition pipe, and the transition pipe is connected to the connecting pipe; and the plurality of branch pipes in the same branch pipe group are all connected to the transition pipe.

[0008] In some embodiments, the extension direction of the transition pipe and the extension direction of the branch pipe are both perpendicular to the extension direction of the connecting pipe, and the extension direction of the transition pipe is perpendicular to the extension direction of the branch pipe.

[0009] In some embodiments, the extension directions of the transition pipes of two adjacent branch pipe groups are perpendicular.

[0010] In some embodiments, one end of the transition pipe of one of the branch pipe groups is open and the other end is closed; both ends of the transition pipes of the remaining branch pipe groups are closed; and the opening is configured as the inlet of the pipeline assembly.

[0011] In some embodiments, a plurality of branch pipes in the same branch pipe group are arranged at intervals along the circumference of the connecting pipe.

[0012] In some embodiments, the pipeline assembly is used for an electrolyte storage tank of a liquid flow battery, and the pipeline assembly includes: a connecting head provided with a liquid inlet; and a plurality of shunt pipes arranged at intervals around the connecting head; wherein the shunt pipe includes a first shunt section and a second shunt section extending in two intersecting directions, the two ends of the first shunt section are respectively connected to the connecting head and the second shunt section, and the second shunt section is provided with a plurality of shunt holes arranged at intervals along its extension direction.

[0013] According to another aspect of the present application, an electrolyte storage tank is provided, comprising the aforementioned pipeline assembly.

[0014] According to another aspect of the present application, a liquid flow battery is provided, comprising the electrolyte storage tank as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a pipeline assembly in an embodiment of the present application is shown.

[0016] Figure 2 Shows Figure 1 Schematic diagram of the structure of a branch pipe group of the central pipeline assembly.

[0017] Figure 3 A schematic structural diagram of a pipeline assembly in another embodiment of the present application is shown.

[0018] Figure 4 Shows Figure 3 Schematic diagram of the structure of a branch pipe group of the central pipeline assembly.

[0019] Figure 5A three-dimensional structural schematic diagram of a pipeline assembly in another embodiment of the present application is shown.

[0020] Figure 6 Shows Figure 5 Top view of one branch group of the midline assembly.

[0021] Figure 7 A schematic structural diagram of a liquid flow battery in an embodiment of the present application is shown.

[0022] Description of Figure Numbers:

[0023] 1. Pipeline components;

[0024] 11. branch pipe; 111. opening; 12. transition pipe; 121. end plate; 13. connecting pipe; 131. adapter;

[0025] Z, first direction;

[0026] 14. Connector; 15. Diverter pipe; 151. First diverter section; 152. Second diverter section; 1521. Diverter hole;

[0027] 2. Liquid flow battery; 21. Battery stack; 22a. Positive electrode electrolyte storage tank; 22b. Negative electrode electrolyte storage tank; 23. Pipeline; 24. Pump body. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0034] A flow battery is a new type of storage battery, which mainly includes a stack unit and an electrolyte storage and supply unit. The stack unit includes a positive electrode, a negative electrode and a diaphragm located between the positive electrode and the negative electrode. The electrolyte storage and supply unit includes a positive electrode electrolyte storage tank and a negative electrode electrolyte storage tank located outside the stack. The positive electrode electrolyte storage tank and the negative electrode electrolyte storage tank store positive electrode electrolyte and negative electrode electrolyte respectively. The positive electrode electrolyte and the negative electrode electrolyte can be transported to the interior of the stack by a pump. The diaphragm can selectively allow the supporting electrolyte to pass through to maintain electrolyte balance.

[0035] The electrolyte undergoes redox reactions at the positive electrode and the negative electrode, and charging and discharging can be achieved by utilizing the redox reactions of active substances in the electrolyte at the electrodes to change the redox state of the active substances.

[0036] The charged or discharged electrolyte flows back from the inlet of the electrolyte storage tank to the electrolyte storage tank and mixes with the uncharged or undischarged electrolyte in the electrolyte storage tank. The mixed electrolyte then flows out from the outlet of the electrolyte storage tank to the battery stack and then participates in the next charging and discharging process. However, in the current electrolyte storage tank, the mixing process has problems such as long mixing time and uneven mixing. The existence of these problems will cause the measurement of the SOC (State of Charge) value of the liquid flow battery to lag or even distort, thereby causing the liquid flow battery to be overcharged or over-discharged.

[0037] To solve the above problems, the present application provides a pipeline assembly for an electrolyte storage tank of a liquid flow battery. By setting a plurality of openings evenly distributed in a three-dimensional space on the pipeline assembly, when the pipeline assembly is applied to the electrolyte storage tank, during the charging and discharging process of the liquid flow battery, the electrolyte that has been charged or discharged can flow out through the plurality of openings evenly distributed in the three-dimensional space and quickly and fully mix with the original electrolyte in the storage tank, thereby keeping the electrolyte concentration inside the entire storage tank balanced.

[0038] Figure 1 A schematic structural diagram of a pipeline assembly in an embodiment of the present application is shown. Figure 2 Shows Figure 1 Schematic diagram of the structure of a branch pipe group of the central pipeline assembly.

[0039] See also Figure 1 and Figure 2 The pipeline assembly 1 provided in one embodiment of the present application is used for an electrolyte storage tank of a flow battery. The pipeline assembly 1 includes a connecting pipe 13 and a plurality of branch pipe groups. Specifically, the plurality of branch pipe groups may be two, three, four, five or more branch pipe groups.

[0040] The plurality of branch pipe groups are arranged at intervals along the first direction Z. Specifically, the plurality of branch pipe groups may be arranged at uniform intervals or at uneven intervals along the first direction Z. For example, when the plurality of branch pipe groups are arranged at uneven intervals along the first direction Z, the intervals between two adjacent branch pipe groups along the first direction Z increase or decrease sequentially.

[0041] Each branch pipe group includes a plurality of branch pipes 11, and each branch pipe 11 extends in a direction intersecting with the first direction Z. The axes of the plurality of branch pipes 11 in the same branch pipe group are located in the same plane. The first direction Z intersects with the plane where the axes of the plurality of branch pipes 11 in the same branch pipe group are located. Exemplarily, the plurality of branch pipes 11 in a branch pipe group are parallel to each other, or the plurality of branch pipes 11 in a branch pipe group intersect. Furthermore, when the plurality of branch pipes 11 in a branch pipe group intersect, the intersection points between any two branch pipes 11 may be arranged to coincide to form a radial structure, or the plurality of branch pipes 11 may be arranged to intersect to form a mesh structure.

[0042] Each branch pipe 11 is provided with a plurality of openings 111. The shape of the openings 111 may be circular, elliptical, triangular, quadrilateral, pentagonal, hexagonal, or a combination of at least two of these shapes. Furthermore, the number of the plurality of openings 111 on different branch pipes 11 may be the same or different.

[0043] The connecting pipe 13 extends along the first direction Z, and the connecting pipe 13 is simultaneously connected to the multiple branch pipes 11 in the multiple branch pipe groups. Optionally, the connecting pipe 13 may also be provided with multiple openings 111. Further, the multiple openings 111 on the connecting pipe 13 are arranged at intervals along the first direction Z. For example, the multiple openings 111 on the connecting pipe 13 are evenly spaced along the first direction Z.

[0044] Based on this, the multiple openings 111 are relatively evenly distributed in the plane where the branch pipe group is located and in the arrangement direction of the multiple branch pipe groups. When the pipeline assembly 1 is applied to the electrolyte storage tank, during the charging and discharging process of the liquid flow battery 2, the electrolyte that has been charged or discharged can flow out through the multiple openings 111 evenly distributed in the three-dimensional space, and quickly and fully mix with the original electrolyte in the storage tank, so that the electrolyte concentration inside the entire storage tank is kept balanced, thereby avoiding the lag or even distortion of the measurement of the liquid flow battery SOC (State of Charge) value, which may cause the liquid flow battery 2 to be overcharged or over-discharged.

[0045] Optionally, the diameter of the connecting pipe 13 is larger than the diameter of the branch pipe 11. In this way, the flow area of ​​the connecting pipe 13 is larger, so that sufficient liquid can be provided to each branch pipe 11 in time.

[0046] Continue reading Figure 1 and Figure 2In some embodiments, the plurality of openings 111 on the branch pipe 11 are arranged in a row along the extension direction of the branch pipe 11. In this way, the distribution of the openings 111 along the extension direction of the branch pipe 11 is more uniform.

[0047] Optionally, a plurality of rows of openings 111 may be provided on the branch pipe 11. In this way, the number of openings 111 on each branch pipe 11 is greater, and the distribution of the openings 111 is more uniform, thereby improving the mixing speed and mixing uniformity.

[0048] Optionally, the branch pipe group further includes a transition pipe 12, and the transition pipe 12 is connected to the connecting pipe 13. Multiple branch pipes 11 in the same branch pipe group are all connected to the transition pipe 12. Based on this, multiple branch pipes 11 in the same branch pipe group are connected through the transition pipe 12, and then the transition pipe 12 is connected to the connecting pipe 13, so as to achieve communication between the branch pipe 11 and the connecting pipe 13.

[0049] Optionally, the extending direction of the transition pipe 12 and the extending direction of the branch pipe 11 are both perpendicular to the extending direction of the connecting pipe 13 , and the extending direction of the transition pipe 12 is perpendicular to the extending direction of the branch pipe 11 .

[0050] Exemplarily, the connecting pipe 13 extends in the vertical direction, the transition pipe 12 and the branch pipe 11 extend in the horizontal direction, and the transition pipe 12 and the branch pipe 11 are perpendicular to each other. In this way, the openings 111 on the branch pipe 11 are evenly distributed in the horizontal direction and the vertical direction. Based on this, the electrolyte can be fully mixed with the original electrolyte after flowing back into the electrolyte storage tank, so that the electrolyte concentration inside the entire electrolyte storage tank is kept balanced.

[0051] Optionally, the extension directions of the transition pipes 12 of two adjacent branch pipe groups are perpendicular. Thus, the extension directions of the branch pipes 11 of two adjacent branch pipe groups are also perpendicular, so that the directions of the openings 111 on the branch pipes 11 of two adjacent branch pipe groups are different, thereby further improving the uniformity of electrolyte mixing.

[0052] Optionally, one end of the transition pipe 12 of one branch pipe group is open and the other end is closed, and both ends of the transition pipes 12 of the other branch pipe groups are closed. The opening is configured as the inlet of the pipeline assembly 1. For example, an end plate 121 can be provided at one end of the transition pipe 12, and the end is closed by the end plate 121. The end plate 121 and the transition pipe 12 can be sealed and fixed by gluing, interference fit, welding, etc.

[0053] Furthermore, both ends of the branch pipe 11 are closed.

[0054] Exemplarily, a plurality of branch pipe groups are arranged at intervals in the vertical direction, and one end of the transition pipe 12 of the uppermost branch pipe group is open and the other end is closed.

[0055] Based on this, after the electrolyte enters the pipeline assembly 1, it can only flow out from the opening 111 on each branch pipe 11, or, when the connecting pipe 13 is also provided with an opening 111, the electrolyte entering the pipeline assembly 1 can only flow out from the openings 111 on the branch pipes 11 and the connecting pipes 13. The openings 111 on the branch pipes 11 are evenly distributed in the plane where the corresponding branch pipe group is located, and the openings 111 on the connecting pipe 13 are distributed in the extension direction of the connecting pipe 13, so that the electrolyte can be fully mixed with the original electrolyte after entering the electrolyte storage tank, so that the electrolyte concentration inside the entire electrolyte storage tank can be kept balanced, thereby improving the timeliness and accuracy of the SOC value of the flow battery 2, and avoiding overcharging or over-discharging of the flow battery 2.

[0056] Figure 3 A schematic structural diagram of a pipeline assembly in another embodiment of the present application is shown. Figure 4 Shows Figure 3 Schematic diagram of the structure of a branch pipe group of the central pipeline assembly.

[0057] See also Figure 3 and Figure 4 In some embodiments, the pipeline assembly 1 includes multiple branch pipe groups and a connecting pipe 13 that simultaneously connects multiple branch pipes 11 in the multiple branch pipe groups. The axes of the multiple branch pipes 11 in the same branch pipe group are located in the same plane, and the multiple branch pipes 11 in the same branch pipe group are arranged at intervals along the circumference of the connecting pipe 13. The extension direction of the branch pipe 11 intersects with the arrangement direction of the multiple branch pipe groups, and the arrangement direction of the multiple branch pipe groups intersects with the plane where the axes of the multiple branch pipes 11 in the same branch pipe group are located. Furthermore, multiple openings 111 are provided on each branch pipe 11.

[0058] In this way, the plurality of openings 111 are evenly distributed in the plane where the branch pipe group is located and in the arrangement direction of the plurality of branch pipe groups. Based on this, when the pipeline assembly 1 is applied to an electrolyte storage tank, during the charging and discharging process of the flow battery 2, the charged or discharged electrolyte can flow out through the plurality of openings 111 evenly distributed in the three-dimensional space and quickly and fully mix with the original electrolyte in the storage tank, so that the electrolyte concentration inside the entire storage tank remains balanced.

[0059] Optionally, to facilitate the connection between multiple circumferential branch pipes 11 and the connecting pipe 13, an adapter 131 may be provided on the connecting pipe 13, and multiple interfaces arranged at intervals along the circumference are provided on the adapter 131, and the multiple branch pipes 11 are respectively connected to the multiple interfaces of the adapter 131.

[0060] Figure 5 A three-dimensional structural schematic diagram of a pipeline assembly in another embodiment of the present application is shown. Figure 6 Shows Figure 5 Top view of one branch group of the midline assembly.

[0061] See also Figure 5 and Figure 6 Based on the same invention purpose, the present application also provides a pipeline assembly 1, which is used for an electrolyte storage tank of a flow battery. The pipeline assembly 1 includes a connector 14 and a plurality of shunt tubes 15. The plurality of shunt tubes 15 can specifically be three, four, five, six or more shunt tubes 15.

[0062] The connector 14 is provided with a liquid inlet to allow the electrolyte to enter the pipeline assembly 1. Further, the liquid inlet of the connector 14 can be connected to a liquid pipe, which extends to the inlet of the electrolyte storage tank and is connected to the electrolyte return pipe.

[0063] A plurality of flow diverter tubes 15 are arranged at intervals around the connector 14. The flow diverter tube 15 includes a first flow diverter section 151 and a second flow diverter section 152 extending in two intersecting directions. The two ends of the first flow diverter section 151 are respectively connected to the connector 14 and the second flow diverter section 152. The second flow diverter section 152 is provided with a plurality of flow diverter holes 1521 arranged at intervals along its extending direction.

[0064] In this way, the plurality of diverter holes 1521 are relatively evenly distributed in the three-dimensional space. Based on this, when the pipeline assembly 1 is applied to the electrolyte storage tank, during the charging and discharging process of the flow battery 2, the charged or discharged electrolyte can flow out through the plurality of diverter holes 1521 evenly distributed in the three-dimensional space, and quickly and fully mix with the original electrolyte in the electrolyte storage tank, so that the electrolyte concentration inside the entire storage tank remains balanced.

[0065] Optionally, the first flow diversion section 151 is perpendicular to the second flow diversion section 152. For example, the first flow diversion section 151 extends in the horizontal direction, and the second flow diversion section 152 extends in the vertical direction. In this way, the multiple flow diversion holes 1521 on the multiple flow diversion tubes 15 are more evenly distributed in three-dimensional space.

[0066] Optionally, one end of the second diverter section 152 away from the first diverter section 151 is closed. In this way, the electrolyte in the second diverter section 152 can only flow out through the diverter hole 1521 thereon, so that the hydraulic pressure in the second diverter section 152 is larger, so that the electrolyte in the second diverter section 152 can be more fully mixed with the original electrolyte in the electrolyte storage tank.

[0067] Based on the same invention purpose, the present application also provides an electrolyte storage tank, which includes the pipeline assembly in the above embodiment.

[0068] Optionally, the electrolyte storage tank includes a tank body and a pipeline assembly, wherein the pipeline assembly is disposed in the tank body. The tank body is provided with an electrolyte inlet, and the inlet of the pipeline assembly is connected to the electrolyte inlet. The cross-sectional shape of the tank body may be circular, elliptical or rectangular.

[0069] Figure 7 A schematic structural diagram of a liquid flow battery in an embodiment of the present application is shown.

[0070] See also Figure 7 Based on the same invention purpose, the present application also provides a liquid flow battery 2, which includes the electrolyte storage tank in the above embodiment.

[0071] Optionally, the flow battery 2 includes a battery stack 21, a positive electrode electrolyte storage tank 22a, and a negative electrode electrolyte storage tank 22b. The battery stack 21 includes a positive electrode and a negative electrode, the positive electrode electrolyte storage tank 22a stores a positive electrode electrolyte, and the negative electrode electrolyte storage tank 22b stores a negative electrode electrolyte. The positive electrode electrolyte storage tank 22a and the negative electrode electrolyte storage tank 22b are each provided with an inlet and an outlet, and the inlet and the outlet are respectively connected to the battery stack 21 through a pipe 23. A pump body 24 is provided on the pipe 23 at the outlet. The pump body 24 can be used to transport the positive electrode electrolyte in the positive electrode electrolyte storage tank 22a to the positive electrode inside the battery stack 21, and the negative electrode electrolyte in the negative electrode electrolyte storage tank 22b is transported to the negative electrode inside the battery stack 21, so as to realize charging and discharging. The pipe 23 at the inlet allows the charged or discharged electrolyte to flow back to the positive electrode electrolyte storage tank 22a and the negative electrode electrolyte storage tank 22b. The refluxed electrolyte is quickly and evenly mixed with the original electrolyte in the storage tank through the action of the above-mentioned pipeline assembly 1.

[0072] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A pipeline assembly for an electrolyte storage tank of a flow battery, characterized in that: The pipeline assembly comprises: A plurality of branch pipe groups, wherein the plurality of branch pipe groups are arranged at intervals along a first direction, each of the branch pipe groups comprises a plurality of branch pipes, each of the branch pipes extends along a direction intersecting the first direction, the axes of the plurality of branch pipes in the same branch pipe group are located in the same plane, and each of the branch pipes is provided with a plurality of openings; the plurality of openings on the branch pipes are arranged in a row along the extension direction of the branch pipe; and A connecting pipe extending along the first direction, and the connecting pipe is simultaneously connected to a plurality of the branch pipes in a plurality of the branch pipe groups; Wherein, the first direction is perpendicular to the plane where the axes of the multiple branch pipes in the same branch pipe group are located; the branch pipe group also includes a transition pipe, which is connected to the connecting pipe, and the extension directions of the transition pipes of two adjacent branch pipe groups are perpendicular.

2. The pipeline assembly according to claim 1, characterized in that: The plurality of branch pipes in the same branch pipe group are all connected to the transition pipe.

3. The pipeline assembly according to claim 2, characterized in that: The extending direction of the transition pipe and the extending direction of the branch pipe are both perpendicular to the extending direction of the connecting pipe, and the extending direction of the transition pipe is perpendicular to the extending direction of the branch pipe.

4. The pipeline assembly according to claim 2, characterized in that: One end of the transition pipe of one of the branch pipe groups is open, and the other end is closed; Both ends of the transition pipes of the remaining branch pipe groups are closed; The opening is configured as an inlet of the pipe assembly.

5. The pipeline assembly according to claim 4, characterized in that: An end plate is arranged at one end of the transition pipe so as to close one end of the transition pipe by using the end plate.

6. The pipeline assembly according to claim 2, characterized in that: Both ends of the branch pipe are closed.

7. The pipeline assembly according to claim 1, characterized in that: The branch pipe is provided with a plurality of rows of openings.

8. A pipeline assembly for an electrolyte storage tank of a flow battery, characterized in that: The pipeline assembly comprises: A connector having a liquid inlet; and A plurality of shunt pipes are arranged at intervals around the connector; The shunt pipe comprises a first shunt section and a second shunt section extending in two intersecting directions, the two ends of the first shunt section are respectively connected to the connector and the second shunt section, and the second shunt section is provided with a plurality of shunt holes arranged at intervals along its extending direction; The first flow diversion section extends in a horizontal direction, and the second flow diversion section extends in a vertical direction.

9. An electrolyte storage tank, characterized in that: Comprising the pipeline assembly according to any one of claims 1 to 8.

10. A liquid flow battery, characterized in that: Comprising the electrolyte storage tank as described in claim 9.

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