Liquid cooling pipeline of energy storage system

Abstract

The utility model provides a liquid cooling pipeline of an energy storage system. The liquid cooling pipeline comprises a first-stage pipeline, a second-stage pipeline and a third-stage pipeline, the number of the first-stage pipelines is two, the first-stage pipelines are used for being arranged at the top and the bottom of each battery cluster respectively, the cluster number of the battery clusters is 2N, the number of battery packs of a single battery cluster is M, M and N are positive integers, the battery clusters are arranged in an array mode, and the battery clusters in each row are divided into a plurality of pairs of battery clusters in the first direction; the number of the second-stage pipelines is 2N, the second-stage pipelines are used for being arranged on the two sides of each pair of battery clusters in the vertical direction, and at least one end of each second-stage pipeline is communicated with the first-stage pipeline; the number of the three-stage pipelines is 3N * M, and the three-stage pipelines are used for communicating the two battery packs on the same layer of each pair of battery clusters, so that the cooling liquid is distributed into each battery pack. Compared with the prior art, the number of the liquid cooling pipelines is reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a liquid cooling pipeline and installation method for an energy storage system. Background Technology

[0002] The energy storage system consists of at least one battery compartment. Each battery compartment contains multiple battery clusters, and each cluster contains multiple battery packs. Each battery pack typically uses liquid-cooled plates for heat dissipation, and the battery compartment is equipped with liquid-cooled piping for cooling the battery packs.

[0003] In existing technologies, such as Figure 1 As shown, liquid cooling piping is generally divided into main inlet pipe, main return pipe, primary pipe, secondary pipe, and tertiary pipe. The liquid cooling piping, liquid cooling plate channels, and pipes within the chiller unit form a coolant circulation loop. Currently, the battery clusters in the battery compartment are arranged back-to-back, with the battery clusters divided into two rows along the length of the compartment. In a battery compartment containing 2N clusters, each cluster consisting of M battery packs, the coolant, after being cooled by a chiller, enters the liquid-cooled pipeline through the main inlet pipe. It then splits into two paths into the primary pipeline, which further splits into 2N paths into the secondary pipeline. From the secondary pipeline, it splits into M paths into the tertiary pipeline. In the tertiary pipeline, the coolant flows through the liquid-cooled plate channels of each individual battery pack, carrying away the heat generated during cell operation, before flowing back into the tertiary pipeline. The M paths of coolant then rejoin the secondary pipeline and flow back into the primary pipeline. The two primary pipeline paths merge and flow into the main return pipeline, then back to the chiller for recooling. This cycle repeats to dissipate heat from the energy storage system. Here, M and N are both positive integers.

[0004] The above scheme requires a total of 1 main water inlet pipe, 1 main water outlet pipe, 2 primary pipes, 4N secondary pipes, and 4N×M tertiary pipes in a battery compartment containing 2N clusters and M battery packs per cluster. The number of pipes required is relatively large, resulting in high manufacturing costs. Utility Model Content

[0005] This utility model aims to solve, at least to a certain extent, one of the technical problems in the related art.

[0006] Therefore, the purpose of this utility model is to propose a liquid cooling pipeline and installation method for an energy storage system, which can reduce the number of required pipelines and reduce manufacturing costs while ensuring heat dissipation effect.

[0007] To achieve the above objectives, the first aspect of this utility model proposes a liquid-cooled pipeline for an energy storage system, comprising a primary pipeline, a secondary pipeline, and a tertiary pipeline;

[0008] The number of the primary pipelines is 2, which are arranged at the top and bottom of the battery cluster respectively, wherein the number of the battery clusters is 2N, the number of the battery packs in a single cluster is M, M and N are positive integers, the battery clusters are arranged in an array, and each row of the battery clusters is divided into a plurality of pairs of battery clusters along a first direction;

[0009] The number of the secondary pipelines is 2N, which are arranged on both sides of each pair of the battery clusters along a vertical direction, and at least one end of the secondary pipeline is communicated with the primary pipeline;

[0010] The number of the tertiary pipelines is 3N*M, which are used to communicate two battery packs in the same layer of each pair of the battery clusters, so that the cooling liquid is distributed into each battery pack.

[0011] According to the liquid cooling pipeline of the energy storage system, each row of the battery clusters is divided into a plurality of pairs of battery clusters along a first direction, one secondary pipeline is arranged on each side of each pair of the battery clusters, two battery packs in the same layer of each pair of the battery clusters are communicated by a tertiary pipeline, thereby, the number of the secondary pipelines of the entire liquid cooling pipeline is only 2N, and the number of the tertiary pipelines is only 3N*M, compared with the liquid cooling pipeline in the prior art, the number of the secondary pipelines is saved by half, and the number of the tertiary pipelines is saved by one fourth, so that the number of the liquid cooling pipeline is reduced, and the manufacturing cost is reduced.

[0012] According to an embodiment of the utility model, the battery pack includes a battery cell module and a liquid cooling plate, the battery cell module and the liquid cooling plate are in contact, the same side of the liquid cooling plate is provided with a battery pack liquid inlet and a battery pack liquid outlet, and the battery pack liquid inlet and the battery pack liquid outlet are communicated with the tertiary pipeline.

[0013] According to an embodiment of the utility model, the battery clusters adopt a back-to-back arrangement form, and the battery clusters are divided into two columns along the first direction.

[0014] According to an embodiment of the utility model, the tertiary pipeline includes a first conveying pipe and a second conveying pipe, the first conveying pipe is used to communicate the secondary pipeline and the battery pack liquid inlet and the secondary pipeline and the battery pack liquid outlet, the second conveying pipe is used to communicate the battery pack liquid inlet and the battery pack liquid outlet of two battery packs in the same layer of each pair of the battery clusters, the number of the first conveying pipe is 2N*M, and the number of the second conveying pipe is N*M.

[0015] According to an embodiment of the utility model, a secondary pipeline tee joint is further included, the primary pipeline and the secondary pipeline are communicated through the secondary pipeline tee joint, and the number of the secondary pipeline tee joint is 2N.

[0016] According to one embodiment of the utility model, the pipe inner diameter of the first pipeline, the pipe inner diameter of the second pipeline and the pipe inner diameter of the third pipeline decrease in turn.

[0017] According to one embodiment of the utility model, the pipe inner diameter of the first pipeline, the pipe inner diameter of the second pipeline and the pipe inner diameter of the third pipeline decrease in turn.

[0018] According to one embodiment of the utility model, the total liquid inlet pipeline and the total liquid outlet pipeline are arranged on the same side of the battery cluster.

[0019] According to one embodiment of the utility model, the first pipeline is in U shape.

[0020] The utility model discloses a second aspect provides a kind of installation method of liquid cooling pipeline of energy storage system, comprising:

[0021] Install first pipeline, wherein the number of the first pipeline is 2, for being arranged at the top and bottom of battery cluster respectively, the cluster number of battery cluster is 2N, the battery pack number of single cluster battery cluster is M, M, N is positive integer, the battery cluster is arrayed, and the battery cluster of each row is divided into several pairs of battery cluster along the first direction;

[0022] Install second pipeline, connect the second pipeline with the first pipeline using one-two level pipeline tee joint, wherein the number of the second pipeline is 2N, is arranged on both sides of each pair of battery cluster along vertical direction, and at least one end of the second pipeline is communicated with the first pipeline;

[0023] Install third pipeline, connect the second pipeline with the third pipeline using two-three level pipeline tee joint, wherein the number of the third pipeline is 3N×M, for connecting two battery packs in the same layer of each pair of battery cluster, so that cooling liquid is distributed into each battery pack.

[0024] According to the installation method of liquid cooling pipeline of energy storage system of the utility model, by dividing the battery cluster of each row into several pairs of battery cluster along the first direction, one second pipeline is arranged on both sides of each pair of battery cluster, two battery packs in the same layer of each pair of battery cluster are connected in series using third pipeline, whereby, the second pipeline of entire liquid cooling pipeline only needs 2N, and the third pipeline only needs 3N×M, compared with the liquid cooling pipeline in the prior art, the number of second pipeline is saved by half, and the number of third pipeline is saved by one fourth, whereby the number of pipeline of liquid cooling pipeline is reduced, and manufacturing cost is reduced.

[0025] The additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. Some aspects of the present application will be appreciated by reading the following detailed description, along with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Furthermore, the drawings are not necessarily drawn to scale. In the drawings:

[0027] Figure 1 is a partial structure schematic diagram of a battery cabin in the prior art.

[0028] Figure 2 is a partial structure schematic diagram of a battery cabin according to an embodiment of the present application.

[0029] Figure 3 is a structure schematic diagram of a liquid cooling pipe of an energy storage system according to an embodiment of the present application.

[0030] Figure 4 is a structure schematic diagram of a battery cabin according to an embodiment of the present application.

[0031] Figure 5 is a flowchart of a mounting method of a liquid cooling pipe of an energy storage system according to an embodiment of the present application.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 1 - total liquid inlet pipe, 2 - total liquid outlet pipe, 3 - first level pipe, 4 - second level pipe, 5 - third level pipe, 51 - first conveying pipe, 52 - second conveying pipe, 6 - battery pack, 7 - liquid cooling plate, 8 - battery pack liquid inlet, 9 - battery pack liquid outlet. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals are used throughout the drawings to refer to the same or like components or elements. The embodiments described below are illustrative of the present application and are not meant to be limiting. Accordingly, the embodiments of the present application encompass all variations, modifications and alternatives that fall within the spirit and scope of the appended claims as interpreted according to the plain meaning of the statutory language and the doctrine of equivalents.

[0035] Reference is made to Figures 2 to 4 , for describing a liquid cooling pipe of an energy storage system according to an embodiment of the present application.

[0036] The liquid cooling pipeline of the energy storage system according to the embodiment of the utility model, including one stage pipeline 3, two stage pipeline 4 and three stage pipeline 5.

[0037] The number of one stage pipeline 3 is 2, is arranged respectively in the top and bottom of battery cluster, wherein the cluster number of battery cluster is 2N, the battery pack 6 number of single cluster battery cluster is M, M, N is positive integer, battery cluster is arrayed, and the battery cluster of each row is divided into a plurality of pairs of battery clusters along the first direction. The number of two stage pipeline 4 is 2N, is arranged in the two sides of each pair of battery clusters along the vertical direction, and at least one end of two stage pipeline 4 is communicated with one stage pipeline 3. The number of three stage pipeline 5 is 3NXM, is used to communicate two battery packs 6 in the same layer of each pair of battery clusters, so that the cooling liquid is distributed into each battery pack 6.

[0038] The first direction is set according to actual needs, and in an example, the first direction is the length direction of the battery cluster. The length of one stage pipeline 3 is set according to actual needs, and no specific limitation is made to this. In an example, one stage pipeline 3 is U-shaped as a whole, and one stage pipeline 3 can surround the projection of the battery cluster in the plane where one stage pipeline 3 is located, achieving a higher cooling effect. The length of each two stage pipeline 4 is adapted to the height of the battery cluster, and two stage pipeline 4 uniformly distributes the cooling liquid from one stage pipeline 3 to each battery cluster, so that each battery cluster can obtain sufficient cooling liquid. Three stage pipeline 5 uniformly distributes the cooling liquid from two stage pipeline 4 to each battery pack 6, achieving heat dissipation of the battery module in the battery pack.

[0039] Under the pumping pressure of the external water chiller, the cooling liquid flows into one stage pipeline 3, and the cooling liquid in one stage pipeline 3 at the bottom of the battery cluster flows upward along two stage pipeline 4 and flows into each battery pack 6 through three stage pipeline 5, and then converges into one stage pipeline 3 at the top of the battery cluster, and finally flows out, and after being cooled by the water chiller, enters one stage pipeline 3 again, and circulates in this way.

[0040] According to the embodiment of the utility model, by dividing the battery cluster of each row into a plurality of pairs of battery clusters along the first direction, arranging one two stage pipeline on each side of each pair of battery clusters, and connecting two battery packs in the same layer of each pair of battery clusters by three stage pipeline, the number of two stage pipelines of the entire liquid cooling pipeline is only 2N, and the number of three stage pipelines is only 3NXM, compared with the liquid cooling pipeline in the prior art, the number of two stage pipelines is reduced by half, and the number of three stage pipelines is reduced by one fourth, so that the number of liquid cooling pipelines is reduced, and the manufacturing cost is reduced.

[0041] In some embodiments, in combination with Figure 2 and Figure 4 As shown in FIG. 7, the battery pack 6 includes battery cell modules and a liquid cooling plate 7, the same side of the liquid cooling plate 7 is provided with a battery pack liquid inlet 8 and a battery pack liquid outlet 9, both of which are in communication with the tertiary pipeline 5. The liquid cooling plate 7 is provided with a flow channel, the first end of the flow channel is the battery pack liquid inlet 8, and the last end of the flow channel is the battery pack liquid outlet 9. The liquid cooling plate 7 circulates the cooling liquid in the flow channel, so that the battery modules work at an appropriate temperature, prolonging the service life.

[0042] In one example, the battery clusters are arranged in a back-to-back arrangement, and the battery clusters are divided into two columns along a first direction. This arrangement of the battery clusters can effectively utilize space. The back-to-back arrangement can also reduce local overheating, avoid the thermal island effect, and improve the consistency and life of the battery pack.

[0043] In some embodiments, in combination with Figures 2 to 4 As shown in FIG. 8, the tertiary pipeline 5 includes a first conveying pipe 51 and a second conveying pipe 52, the first conveying pipe 51 is used to communicate the secondary pipeline 4 and the battery pack liquid inlet 8 and the secondary pipeline 4 and the battery pack liquid outlet 9, and the second conveying pipe 52 is used to communicate the battery pack liquid inlet 8 and the battery pack liquid outlet 9 of the two battery packs located at the same layer of each pair of battery clusters. The number of first conveying pipes 51 is 2N x M, and the number of second conveying pipes 52 is N x M, so that the number of the entire tertiary pipeline 5 is 3N x M. In one example, a one-way stop valve (not shown in the figure) is provided on the first conveying pipe 51 and / or the second conveying pipe 52, which can prevent the cooling liquid from flowing in the opposite direction and flow in the predetermined direction. The one-way stop valve can also keep the flow of the cooling liquid relatively stable and avoid flow fluctuations caused by backflow. When some pipelines of the tertiary pipeline 5 need to be replaced, the one-way stop valve can quickly close to prevent the cooling liquid from continuing to flow.

[0044] The liquid cooling pipeline of the energy storage system also includes a total liquid inlet pipeline 1 and a total liquid outlet pipeline 2, which are provided on the same side of the battery clusters. The total liquid inlet pipeline 1 and the total liquid outlet pipeline 2 can deliver the cooling liquid to the battery clusters and collect the cooling liquid flowing out of the battery clusters, effectively control the temperature of the battery modules, reduce the intersection of the pipelines, and reduce the complexity of the pipelines. The total liquid inlet pipeline 1 and the total liquid outlet pipeline 2 are provided on the same side of the battery clusters, which can reduce the length of the liquid cooling pipeline, save material costs, and reduce the flow resistance and the energy required for pumping due to the shorter length of the liquid cooling pipeline.

[0045] The liquid cooling pipeline of the energy storage system further comprises a two-stage pipeline tee joint and a two-stage three-stage pipeline tee joint. The first-stage pipeline 3 and the two-stage pipeline 4 are communicated through the two-stage pipeline tee joint, and the number of the two-stage pipeline tee joint is 2N. The two-stage pipeline 4 and the three-stage pipeline 5 are communicated through the two-stage three-stage pipeline tee joint, and the number of the two-stage three-stage pipeline tee joint is 2N*M. The two-stage pipeline tee joint and the two-stage three-stage pipeline tee joint play a role in distributing and collecting the cooling liquid. The two-stage pipeline tee joint and the two-stage three-stage pipeline tee joint can be quick joints in specific implementation, which can facilitate the disassembly of some pipelines in the two-stage pipeline and the three-stage pipeline during replacement. Compared with the liquid cooling pipeline in the background art, the number of the two-stage pipeline tee joint and the two-stage three-stage pipeline tee joint is reduced, which can save manufacturing costs.

[0046] The inner diameters of the first-stage pipeline 3, the two-stage pipeline 4 and the three-stage pipeline 5 are sequentially reduced. By gradually reducing the inner diameters, the flow of the cooling liquid in the pipelines can be more uniform, and local overheating can be avoided. With the reduction of the inner diameters, the flow rate gradually increases, which helps to improve the cooling effect. Higher flow rate can better take away heat, and each battery module can be fully cooled.

[0047] In summary, the liquid cooling pipeline of the energy storage system in the prior art is designed to connect the flow channels of the liquid cooling plates of the single-cluster battery pack, and the liquid cooling pipelines of two clusters are connected in series by connecting the liquid cooling plates of the two clusters in each layer of the battery pack in the embodiment of the utility model, thereby reducing the pipelines and joint accessories and reducing the manufacturing cost.

[0048] In combination with Figures 2 to 5 The embodiment of the utility model further provides a mounting method of the liquid cooling pipeline of the energy storage system. The implementation process of the method is as follows:

[0049] In step S102, the first-stage pipeline 3 is mounted, and the number of the first-stage pipeline is 2, which is arranged at the top and the bottom of the battery cluster respectively. The number of the battery cluster is 2N, the number of the battery pack of the single-cluster battery cluster is M, M and N are positive integers, the battery cluster is arranged in an array, and each row of the battery cluster is divided into a plurality of pairs of battery clusters along the first direction.

[0050] In this embodiment, the first direction is the length direction of the battery cluster.

[0051] In step S104, the two-stage pipeline 4 is mounted, and the two-stage pipeline 4 is connected with the first-stage pipeline 3 through the two-stage pipeline tee joint. The number of the two-stage pipeline 4 is 2N, which is arranged on both sides of each pair of battery clusters in the vertical direction, and at least one end of the two-stage pipeline 4 is communicated with the first-stage pipeline 3.

[0052] In the embodiment, the two-stage pipeline three-way joints are quick joints, and the number of the two-stage pipeline three-way joints is 2N.

[0053] In step S106, the three-stage pipeline 5 is installed, and the two-stage pipeline 4 and the three-stage pipeline 5 are connected by using two-stage-three-stage pipeline three-way joints, wherein the number of the three-stage pipeline 5 is 3N x M, and the three-stage pipeline 5 is used to connect two battery packs 6 located at the same layer of each pair of battery clusters, so that the cooling liquid is distributed into each battery pack 6.

[0054] In the embodiment, the two-stage-three-stage pipeline three-way joints are quick joints, and the number of the two-stage-three-stage pipeline three-way joints is 2N x M. The three-stage pipeline 5 includes a first conveying pipe 51 and a second conveying pipe 52, the first conveying pipe 51 is used to connect the two-stage pipeline 4 and the battery pack liquid inlet 8 and the two-stage pipeline 4 and the battery pack liquid outlet 9, and the second conveying pipe 52 is used to connect the battery pack liquid inlet 8 and the battery pack liquid outlet 9 of two battery packs located at the same layer of each pair of battery clusters. The number of the first conveying pipe 51 is 2N x M, and the number of the second conveying pipe 52 is N x M, so that the number of the entire three-stage pipeline 5 is 3N x M.

[0055] According to the installation method of the liquid cooling pipeline of the energy storage system, each row of battery clusters is divided into a plurality of pairs of battery clusters along a first direction, one two-stage pipeline is arranged on each side of each pair of battery clusters, and two battery packs located at the same layer of each pair of battery clusters are connected in series by a three-stage pipeline. Therefore, the two-stage pipeline of the entire liquid cooling pipeline only needs 2N, and the three-stage pipeline only needs 3N x M. Compared with the liquid cooling pipeline in the prior art, the number of the two-stage pipeline is reduced by half, and the number of the three-stage pipeline is reduced by one fourth. Therefore, the number of the liquid cooling pipeline is reduced, and the manufacturing cost is reduced.

[0056] It should be noted that, in the description of the present application, the terms "first", "second" and the like are only used for the purpose of description and should not be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified and limited, the meaning of "a plurality of" is two or more.

[0057] In the present application, unless otherwise specified and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specified. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0059] In the description of the present application, the terms "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the 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 particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0060] Any process or method descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions or other processes, and the various embodiments of the present application include additional implementations in which the order of execution is different, in which other code modules are utilized, in which not all code modules are utilized, in which code modules are utilized in combination with one another, and in which other structures and methods of implementation are utilized, all of which are within the scope of the present application.

[0061] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A liquid-cooled tube of an energy storage system, characterized by, The first pipeline (3), the second pipeline (4) and the third pipeline (5) are arranged in the battery pack. The first pipeline (3) is arranged at the top and the bottom of the battery cluster, respectively, and the number of the battery cluster is 2N, and the number of the battery pack (6) in a single cluster is M, M and N are positive integers, the battery cluster is arranged in an array, and each row of the battery cluster is divided into a plurality of pairs of battery clusters along a first direction. The second pipeline (4) is arranged on both sides of each pair of battery clusters along the vertical direction, and at least one end of the second pipeline (4) is communicated with the first pipeline (3). The third pipeline (5) is arranged to communicate two battery packs (6) in the same layer of each pair of battery clusters, so that the cooling liquid is distributed into each battery pack (6).

2. The liquid-cooled piping of an energy storage system according to claim 1, wherein, The battery pack (6) comprises a battery cell module and a liquid cooling plate (7), the battery cell module and the liquid cooling plate (7) are in contact, and the same side of the liquid cooling plate (7) is provided with a battery pack inlet (8) and a battery pack outlet (9), and the battery pack inlet (8) and the battery pack outlet (9) are communicated with the third pipeline (5).

3. The liquid-cooled piping of an energy storage system of claim 1, wherein, The battery cluster adopts a back-to-back arrangement, and the battery cluster is divided into two columns along the first direction.

4. The liquid-cooled piping of an energy storage system of claim 1, wherein, The third pipeline (5) comprises a first conveying pipe (51) and a second conveying pipe (52), the first conveying pipe (51) is used to communicate the second pipeline (4) and the battery pack inlet (8) and the second pipeline (4) and the battery pack outlet (9), and the second conveying pipe (52) is used to communicate the battery pack inlet (8) and the battery pack outlet (9) of two battery packs in the same layer of each pair of battery clusters, the number of the first conveying pipe (51) is 2N×M, and the number of the second conveying pipe (52) is N×M.

5. The liquid-cooled piping of an energy storage system of claim 1, wherein, A second pipeline three-way joint is further included, the first pipeline (3) and the second pipeline (4) are communicated through the second pipeline three-way joint, and the number of the second pipeline three-way joint is 2N.

6. The liquid-cooled piping of an energy storage system of claim 1, wherein, A second pipeline three-way joint is further included, the first pipeline (3) and the second pipeline (4) are communicated through the second pipeline three-way joint, and the number of the second pipeline three-way joint is 2N.

7. The liquid-cooled piping of an energy storage system of claim 1, wherein, The inner diameter of the first pipeline (3), the inner diameter of the second pipeline (4) and the inner diameter of the third pipeline (5) decrease in order.

8. The liquid-cooled piping of an energy storage system of claim 1, wherein, A total inlet pipeline (1) and a total outlet pipeline (2) are further included, and the total inlet pipeline (1) and the total outlet pipeline (2) are arranged on the same side of the battery cluster.

9. The liquid-cooled piping of an energy storage system according to any one of claims 1 to 8, characterized in that, The first pipeline (3) is in the shape of U.

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