Energy storage system

Abstract

The utility model relates to the field of batteries, and discloses an energy storage system which comprises a heat exchange pipeline assembly and a plurality of energy storage clusters, the energy storage cluster comprises a plurality of battery packs and a plurality of heat exchange plates, and the heat exchange plates correspond to the battery packs so as to conduct heat exchange on the battery packs; the heat exchange pipeline assembly comprises a first-stage pipeline, a second-stage pipeline and a third-stage pipeline which are connected in sequence, the first-stage pipeline is connected with a heat exchange unit and a heat exchange pump of the heat exchange pipeline assembly, and the third-stage pipeline is connected with a heat exchange plate; the secondary pipelines are connected to the energy storage clusters through the heat exchange plates, at least part of the secondary pipelines are shared secondary pipelines, and the same shared secondary pipeline is connected with the multiple energy storage clusters to reduce the number of the secondary pipelines, so that the occupied space of the secondary pipelines can be reduced, and the structure is compact or other structures of the energy storage clusters can be conveniently arranged. The cost of the energy storage system is reduced; the energy storage system is convenient to establish and maintain; and the number of branches of the heat exchange pipeline assembly is reduced, so that flow control is convenient.

Description

Technical Field

[0001] The utility model relates to the field of energy storage systems including batteries, in particular to a heat exchange pipeline component of the energy storage system. Background Art

[0002] In existing energy storage systems, liquid cooling units, liquid cooling pumps and liquid cooling pipeline components are usually provided, and the liquid cooling pipeline components are connected to the heat exchange plates in the energy storage cluster of the energy storage system to dissipate heat from the battery packs corresponding to the heat exchange plates to prevent the battery packs from overheating. However, the existing energy storage systems have a large number of pipelines in the liquid cooling pipeline components, resulting in high costs for the energy storage systems and poor assembly convenience. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an energy storage system in order to overcome the defects of the energy storage system in the prior art, such as high cost and poor assembly convenience.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] An energy storage system, comprising:

[0006] A plurality of energy storage clusters, wherein the energy storage clusters include:

[0007] multiple battery packs; and

[0008] A plurality of heat exchange plates are arranged corresponding to the plurality of battery packs; and

[0009] A heat exchange pipeline assembly, the heat exchange pipeline assembly comprising:

[0010] A primary pipeline connected to the heat exchange unit and the heat exchange pump of the energy storage system;

[0011] a secondary pipeline, the secondary pipeline being connected to the primary pipeline;

[0012] A tertiary pipeline, one end of which is connected to the heat exchange plate, and the other end of which is connected to the secondary pipeline;

[0013] The secondary pipeline is connected to the heat exchange plate through the tertiary pipeline to be connected to the energy storage cluster. At least part of the secondary pipeline is a common secondary pipeline, and the same common secondary pipeline is connected to multiple energy storage clusters.

[0014] In this solution, the heat exchanger unit and the heat exchange pump are connected to the primary pipeline, and the primary pipeline, the secondary pipeline, the tertiary pipeline, and the heat exchange plate are connected in sequence, and the heat exchange plate is arranged corresponding to the battery pack to exchange heat for the battery pack. The heat of the battery pack can be taken away to avoid overheating of the battery pack, or heat can be transferred to the battery pack to prevent the battery pack from freezing and preheating the battery pack in cold weather.

[0015] A common secondary pipeline is connected to multiple energy storage clusters to correspond to multiple energy storage clusters, which can reduce the number of secondary pipelines. On the one hand, the space occupied by the secondary pipeline can be reduced to make the structure of the energy storage system compact; on the other hand, the space occupied by the secondary pipeline can be reduced, and other structures can be arranged in the surplus space to make the layout of the energy storage system flexible or rich in functions; on the third hand, the cost of the secondary pipeline can be reduced to reduce the construction cost of the energy storage system; on the fourth hand, the number of joints between the secondary pipeline and the primary pipeline can be reduced, so that the structure of the energy storage system is simple and easy to assemble and maintain; on the fifth hand, the number of secondary branches of the heat exchange pipeline assembly can be reduced to improve the convenience of flow control.

[0016] Preferably, the number of the primary pipelines is multiple, a part of which is a primary liquid inlet pipe, and the other part is a primary liquid return pipe, the number of the secondary pipelines is multiple, a part of which is a secondary liquid inlet pipe, and the other part is a secondary liquid return pipe, and the number of the tertiary pipelines is multiple, a part of which is a tertiary liquid inlet pipe, and the other part is a tertiary liquid return pipe;

[0017] The liquid inlet of the heat exchange plate is connected to the third-level liquid inlet pipe, the third-level liquid inlet pipe is connected to the second-level liquid inlet pipe, and the second-level liquid inlet pipe is connected to the first-level liquid inlet pipe;

[0018] The liquid outlet of the heat exchange plate is connected to the tertiary liquid return pipe, the tertiary liquid return pipe is connected to the secondary liquid return pipe, and the secondary liquid return pipe is connected to the primary liquid return pipe.

[0019] In this solution, the fluid (such as coolant) enters the heat exchange plate through the first-level liquid inlet pipe, the second-level liquid inlet pipe, the third-level liquid inlet pipe, and the liquid inlet of the heat exchange plate in sequence to achieve liquid inflow, exchange heat in the battery pack, and then returns through the liquid outlet of the heat exchange plate, the third-level liquid return pipe, the second-level liquid return pipe, and the first-level liquid return pipe in sequence.

[0020] Preferably, the plurality of energy storage clusters connected by the common secondary pipeline are adjacent.

[0021] In this solution, multiple energy storage clusters connected by a common secondary pipeline are adjacent to each other, which can avoid crossing between the secondary pipelines, facilitate compact layout of the heat exchange pipeline components and facilitate maintenance.

[0022] Preferably, the plurality of energy storage clusters are arranged at intervals along at least one preset direction, and adjacent regions are formed between adjacent plurality of energy storage clusters;

[0023] The common secondary pipeline is arranged at the adjacent area formed by the plurality of adjacent energy storage clusters connected by the common secondary pipeline.

[0024] In this solution, multiple energy storage clusters are arranged along at least one preset direction, that is, the energy storage clusters are arranged in one dimension (for example, arranged in rows, or arranged in columns) or in multiple dimensions (for example, arranged in rows + columns). An adjacent area is formed between multiple adjacent energy storage clusters connected by a shared secondary pipeline. The shared secondary pipeline is arranged in this adjacent area, which can reduce the distance from the secondary pipeline to the connected energy storage cluster, thereby reducing the length of a single tertiary pipeline or the total length of multiple tertiary pipelines. On the one hand, it can make the structure compact; on the other hand, it can improve the convenience of the energy storage system assembly and reduce the construction cost of the energy storage system. In addition, the length of the tertiary pipeline can be made more uniform.

[0025] Preferably, there are multiple shared secondary pipelines, one part of which is a shared secondary liquid inlet pipe and the other part is a shared secondary liquid return pipe. There are multiple adjacent areas, and the shared secondary liquid inlet pipe and the shared secondary liquid return pipe are arranged in different adjacent areas to connect to different energy storage clusters.

[0026] In this solution, such an arrangement allows one end of the energy storage cluster to be close to the secondary liquid inlet pipe and the other end to be close to the secondary liquid return pipe, so as to reduce the distance from the liquid inlet / liquid outlet of the heat exchange plate corresponding to the battery pack in the energy storage cluster to the secondary liquid inlet pipe / secondary liquid return pipe, thereby reducing the length of the tertiary pipeline.

[0027] Preferably, there are multiple shared secondary pipelines, some of which are shared secondary liquid inlet pipes and the other parts are shared secondary liquid return pipes, and there are multiple adjacent areas; the shared secondary liquid inlet pipes and the shared secondary liquid return pipes are arranged at the same adjacent areas to be connected to the same energy storage cluster, and some of the adjacent areas are not provided with the secondary pipelines.

[0028] In the present solution, such an arrangement, on the one hand, can make the structure compact and facilitate the use of other adjacent areas without secondary pipelines for other purposes, so that the layout of the energy storage system is flexible, for example, the adjacent areas without secondary pipelines are used to arrange partition walls, etc.; on the second hand, when the energy storage clusters are arranged in rows, and one row is an even number of energy storage clusters, compared with energy storage clusters corresponding to the same secondary liquid inlet pipe corresponding to different secondary liquid return pipes, this solution can reduce the total number of secondary pipelines, and can also use only one specification of secondary liquid inlet pipes and one specification of secondary liquid return pipes, which is convenient for manufacturing and assembly; on the third hand, it is convenient to simplify the control logic of the heat exchange pipeline assembly.

[0029] Preferably, the heat exchange channels in the heat exchange plates are symmetrically designed.

[0030] In this solution, the heat exchange channels in the heat exchange plate are symmetrically designed so that the resistance of the liquid in the heat exchange plate in the forward flow (flow from the liquid inlet to the liquid outlet) and the reverse flow (flow from the liquid outlet to the liquid inlet) are equal, so that the secondary pipeline can be arranged at either end of the opposite ends of the heat exchange plate, reducing the position requirements for the secondary pipeline and making the layout of the energy storage system flexible.

[0031] Preferably, the connection port between the heat exchange plate and the tertiary pipeline is arranged close to the secondary pipeline to which the heat exchange plate is connected via the tertiary pipeline.

[0032] In this solution, the heat exchange plate is connected to the secondary pipeline through a tertiary pipeline, and the connection port between the heat exchange plate and the tertiary pipeline is arranged close to the secondary pipeline connected to the heat exchange plate, which can reduce the distance from the connection port to the secondary pipeline and reduce the length of the tertiary pipeline.

[0033] Preferably, the energy storage system further comprises a two-way control valve, and the tertiary pipeline and the heat exchange plate are connected via the two-way control valve.

[0034] In this scheme, it is configured such that, on the one hand, a tertiary pipeline can be controlled individually to control the heat exchange of the battery pack corresponding to the tertiary pipeline and improve the heat exchange accuracy of the heat exchange pipeline assembly; on the other hand, the flow at both ends can be controlled by a two-way control valve, for example, closing either end to stop the flow, which is convenient for maintenance of the battery pack or the heat exchange pipeline assembly.

[0035] Preferably, the number of the three-stage pipelines is multiple, one part is a three-stage liquid inlet pipe, and the other part is a three-stage liquid return pipe;

[0036] Any two of the three-stage liquid inlet pipes have the same structure;

[0037] And / or, any two tertiary liquid return pipes have the same structure.

[0038] In the present solution, such an arrangement can reduce the manufacturing cost of the three-stage liquid inlet pipe and / or the three-stage liquid return pipe, and improve the convenience of assembly.

[0039] Preferably, the plurality of energy storage clusters are arranged along a preset direction, and two adjacent energy storage clusters are connected to the same shared secondary pipeline.

[0040] In this solution, the arrangement is along a preset direction, that is, a one-dimensional arrangement, and the arrangement is simple.

[0041] Preferably, the energy storage system further comprises a four-way element having four passage openings, and the shared secondary pipeline is connected to two of the tertiary pipelines through one of the four-way elements so as to be connected to two of the energy storage clusters.

[0042] In this solution, such an arrangement can reduce the number of tertiary pipeline and secondary pipeline joints, which can reduce costs on the one hand and improve the convenience of assembly on the other hand.

[0043] The positive and progressive effects of the utility model are:

[0044] By connecting multiple energy storage clusters to a common secondary pipeline, the number of secondary pipelines can be reduced. On the one hand, the space occupied by the secondary pipeline can be reduced, making the structure of the energy storage system compact. On the other hand, the space occupied by the secondary pipeline can be reduced, and other structures can be arranged in the surplus space to make the energy storage system flexible or functional. On the third hand, the cost of the secondary pipeline can be reduced to reduce the construction cost of the energy storage system. On the fourth hand, the number of joints between the secondary pipeline and the primary pipeline can be reduced, making the structure of the energy storage system simple and convenient to assemble and maintain. On the fifth hand, the number of secondary branches of the heat exchange pipeline assembly can be reduced to improve the convenience of flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A three-dimensional diagram of the energy storage system provided in Example 1 of the utility model;

[0046] Figure 2 for Figure 1 Front view of the energy storage system;

[0047] Figure 3 A three-dimensional diagram of an energy storage system provided in Example 2 of the utility model;

[0048] Figure 4 A front view of the energy storage system provided in Example 2 of the utility model;

[0049] Figure 5 A schematic diagram of a partial structure of an energy storage system provided in Example 2 of the utility model;

[0050] Figure 6 A three-dimensional diagram of an energy storage system provided in Example 3 of the utility model;

[0051] Figure 7 A front view of the energy storage system provided in Example 3 of the utility model;

[0052] Figure 8 A schematic diagram of a partial structure of an energy storage system provided in Example 3 of the utility model;

[0053] Fig. 9 A schematic diagram of a partial structure of an energy storage system provided in Example 3 of the utility model;

[0054] Fig.10 A top view of the energy storage system provided in Example 4 of the utility model;

[0055] Fig.11 This is a top view of the heat exchange plate provided in Example 5 of the utility model.

[0056] Description of reference numerals:

[0057] Energy storage system 1000;

[0058] Energy storage cluster 1, battery pack 11, heat exchange plate 12, heat exchange plate body 121, liquid inlet 122, liquid outlet 123;

[0059] Heat exchange pipeline assembly 2;

[0060] A primary pipeline 21, a primary liquid inlet pipe 211, and a primary liquid return pipe 212;

[0061] Secondary pipeline 22, single-use secondary pipeline 22-1, shared secondary pipeline 22-2; secondary liquid inlet pipe 221, single-use secondary liquid inlet pipe 221-1, shared secondary liquid inlet pipe 221-2; secondary liquid return pipe 222, single-use secondary liquid return pipe 222-1, shared secondary liquid return pipe 222-2; ("XXX" in "XXXnum" refers to the structure, and "num" refers to the reference number corresponding to "XXX"; "single-use XXXnum-1" refers to "XXX" connected to one energy storage cluster; "shared XXXnum-2" refers to "XXX" connected to multiple energy storage clusters)

[0062] A tertiary pipeline 23, a tertiary liquid inlet pipe 231, and a tertiary liquid return pipe 232;

[0063] Three-way element 241, four-way element 242;

[0064] Connection port 25;

[0065] Adjacent area 3. DETAILED DESCRIPTION

[0066] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0067] Example 1

[0068] This embodiment provides an energy storage system. Figure 1-Figure 2 This is a schematic diagram of the structure provided for this embodiment.

[0069] like Figure 1-Figure 2 The energy storage system 1000 includes a heat exchange pipeline assembly 2 and a plurality of energy storage clusters 1 .

[0070] A single energy storage cluster 1 includes multiple battery packs 11 and multiple heat exchange plates. Figure 2The multiple battery packs 11 enclosed by the same dotted rectangular frame belong to the same energy storage cluster 1. It can be understood that the structure shown in the figure is only for reference. In practice, the multiple battery packs 11 can be arranged on a cabinet or a bracket to form an energy storage cluster 1. The heat exchange plate corresponds to the battery pack 11. The heat exchange plate is not shown in the figure. The heat exchange plate can be arranged in the form of but not limited to being arranged inside the battery pack 11 or integrated in the lower tray of the battery pack 11; one heat exchange plate can be arranged corresponding to one battery pack 11.

[0071] The heat exchange pipeline assembly 2 includes a heat exchange unit, a heat exchange pump, a primary pipeline 21, a secondary pipeline 22, and a tertiary pipeline 23; the primary pipeline 21 is divided into a primary liquid inlet pipe 211 and a primary liquid return pipe 212; the secondary pipeline 22 is divided into a secondary liquid inlet pipe 221 and a secondary liquid return pipe 222; the tertiary pipeline 23 is divided into a tertiary liquid inlet pipe 231 and a tertiary liquid return pipe 232, and the number of the tertiary liquid inlet pipes 231 and the tertiary liquid return pipes 232 respectively corresponds to the number of heat exchange plates; The primary liquid inlet pipe 211, the secondary liquid inlet pipe 221, the tertiary liquid inlet pipe 231, the liquid inlet of the heat exchange plate, the liquid outlet of the heat exchange plate, the tertiary liquid return pipe 232, the secondary liquid return pipe 222, and the primary liquid return pipe 212 are connected in sequence to form a heat exchange path for exchanging heat for the battery pack 11; wherein the primary pipeline is connected to the heat exchange unit and the heat exchange pump, the heat exchange pump provides power for the fluid to flow in the heat exchange path, and the heat exchange unit realizes heat exchange between the fluid and the external environment. By the fluid flowing in the heat exchange path, the battery pack 11 can be heat exchanged to take away the heat of the battery pack 11 to avoid overheating of the battery pack 11, or transfer heat to the battery pack 11 to prevent the battery pack 11 from freezing, preheat the battery pack 11 in cold weather, etc.

[0072] In this embodiment, the secondary pipeline 22 is connected to the tertiary pipeline 23 through the three-way element 241, and the secondary pipeline 22 is connected to the heat exchange plate through the tertiary pipeline 23 to realize the connection between the secondary pipeline 22 and the energy storage cluster 1, so that the secondary pipeline 22 corresponds to the energy storage cluster 1. In this embodiment, the secondary pipelines 22 are all single-use secondary pipelines 22-1, and one single-use secondary pipeline 22-1 is connected to one energy storage cluster 1; the secondary liquid inlet pipe 221 in the secondary pipeline 22 is a single-use secondary liquid inlet pipe 221-1; the secondary liquid return pipe 222 in the secondary pipeline 22 is a single-use secondary liquid return pipe 222-1. It should be noted that: "XXXnum" in "XXX" refers to the structure, and "num" refers to the reference numeral number corresponding to "XXX"; "single-use XXXnum-1" refers to "XXX" connected to one energy storage cluster.

[0073] In this embodiment, the number of energy storage clusters 1 is M1, M1 is an odd number, specifically M1=5; each energy storage cluster 1 is individually connected to a secondary liquid inlet pipe 221 and a secondary liquid return pipe 222, that is, each energy storage cluster 1 is individually connected to two secondary pipelines 22, and the number of secondary pipelines 22 connected to M1 energy storage clusters 1 is N1=M1+M1=2M1. M1 energy storage clusters 1 are arranged along the L direction in a row, and the energy storage clusters 1 are adjacent to each other; and the M1 energy storage clusters 1 are arranged at intervals, and an adjacent area 3 is formed between two adjacent energy storage clusters 1, and the M1 energy storage clusters 1 form a total of M1-1 adjacent areas 3; the two secondary pipelines 22 connected to a single energy storage cluster 1 are respectively arranged at the two ends of the energy storage cluster 1 along the L direction, so that two secondary pipelines are arranged at each adjacent area 3. It can be understood that the adjacent area 3 may refer to an area where multiple adjacent energy storage clusters 1 are close to each other; the adjacent area 3 may be a gap area formed between multiple adjacent energy storage clusters 1, for example, when the battery pack 11 and the heat exchange plate are arranged on the bracket, the adjacent area 3 may be a gap area formed between the battery pack 11 in one energy storage cluster 1 and the battery pack 11 in the adjacent energy storage cluster 1; the adjacent area 3 may be a gap area formed by multiple adjacent energy storage clusters and an area close to the gap, close to the gap means that the width of the gap does not exceed 1 / 3 of the width of the energy storage cluster 1, and the length of the gap does not exceed 1 / 3 of the length of the energy storage cluster 1. For example, when the battery pack 11 and the heat exchange plate are arranged in a cabinet, the adjacent area 3 may be the gap between the cabinet corresponding to one energy storage cluster 1 and the cabinet corresponding to the adjacent energy storage cluster 1, and the area close to the gap on the outside of the cabinet.

[0074] This embodiment is used to compare with other embodiments to help illustrate the beneficial effects of the utility model.

[0075] Example 2

[0076] This embodiment provides an energy storage system. Figure 3-Figure 5 This is a schematic diagram of the structure provided for this embodiment.

[0077] like Figure 3-Figure 5 The energy storage system 1000 includes a heat exchange pipeline assembly 2 and multiple energy storage clusters 1. In this embodiment, the number of energy storage clusters 1 is M2, M2=M1=5. The structure of a single energy storage cluster 1 and the arrangement of multiple energy storage clusters 1 in this embodiment can refer to Example 1. The difference between the energy storage system in this embodiment and the energy storage system in Example 1 mainly lies in the difference in the heat exchange pipeline assembly 2.

[0078] The same as in Example 1 is that the heat exchange pipeline assembly 2 in this embodiment includes a heat exchange unit, a heat exchange pump, and a primary pipeline 21, a secondary pipeline 22, and a tertiary pipeline 23 that are connected in sequence; the primary pipeline is connected to the heat exchange unit and the heat exchange pump to provide power for the fluid to flow in the heat exchange path; the tertiary pipeline 23 is connected to the heat exchange plate in the energy storage cluster 1, and the heat exchange plate corresponds to the battery pack to exchange heat for the battery pack 11.

[0079] The difference from Example 1 is that: Figure 3 , Figure 4 , the energy storage system includes N2 secondary pipelines 22; among them, X2 (X2≥1; in this embodiment, X2=4) secondary pipelines 22 are shared secondary pipelines 22-2, and one shared secondary pipeline 22-2 is connected to Y2 (Y2≥2; in this embodiment, Y2=2) energy storage clusters 1; the remaining secondary pipelines 22 are single-use secondary pipelines 22-1, and one single-use secondary pipeline 22-1 is connected to one energy storage cluster 1. It should be noted that: "shared XXXnum-2" refers to "XXX" connected to multiple energy storage clusters.

[0080] In this embodiment, the number of secondary pipelines 22 N2=2M2-(Y2-1)X2=6=N1-4; compared with Example 1, in this embodiment, four shared secondary pipelines 22-2 are provided, so that the number N2 of secondary pipelines 22 in the energy storage system is reduced by 40% compared with the number N1 of secondary pipelines 22 in Example 1, specifically reduced by 4.

[0081] By setting some of the secondary pipelines 22 as common secondary pipelines 22-2 to connect multiple energy storage clusters 1, the number of secondary pipelines 22 can be reduced. On the one hand, the space occupied by the secondary pipelines 22 can be reduced to make the structure of the energy storage system 1000 compact; on the other hand, the space occupied by the secondary pipelines 22 can be reduced, and other structures can be arranged in the surplus space to make the layout of the energy storage system 1000 flexible or functional; on the third hand, the cost of the secondary pipelines 22 can be reduced to reduce the construction cost of the energy storage system 1000; on the fourth hand, the number of joints between the secondary pipelines 22 and the primary pipelines 21 can be reduced, so that the structure of the energy storage system 1000 is simple and easy to assemble and maintain. Specifically, the number of joints between the secondary pipelines 22 and the primary pipelines 21 in Example 1 and Example 2 are N1 and N2 respectively, and N1-N2=4>0; on the fifth hand, the number of secondary branches N2 of the heat exchange pipeline assembly 2 can be reduced to improve the convenience of flow control.

[0082] Specifically, the same as Example 1 is that: in this embodiment, the primary pipeline 21 is divided into a primary liquid inlet pipe 211 and a primary liquid return pipe 212; the secondary pipeline 22 is divided into a secondary liquid inlet pipe 221 and a secondary liquid return pipe 222, and among the six secondary pipelines 22, three are secondary liquid inlet pipes 221, and three are secondary liquid return pipes 222; the tertiary pipeline 23 is divided into a tertiary liquid inlet pipe 231 and a tertiary liquid return pipe 232, and the number of tertiary liquid inlet pipes 231, tertiary liquid return pipes 232, and heat exchange plates respectively corresponds to the number of battery packs 11; the primary liquid inlet pipe 211, the secondary liquid inlet pipe 221, the tertiary liquid inlet pipe 231, and the liquid inlet of the heat exchange plate are connected in sequence to form a liquid inlet channel of the heat exchange plate; the liquid outlet of the heat exchange plate, the tertiary liquid return pipe 232, the secondary liquid return pipe 222, and the primary liquid return pipe 212 are connected in sequence to form a liquid return channel of the heat exchange plate.

[0083] like Figure 3 , Figure 4 , the energy storage system 1000 further includes a three-way element 241 and a four-way element 242, the three-way element 241 has three passage openings, and the four-way element 242 has four passage openings; Figure 4 The shared secondary pipeline 22-2 is connected to two tertiary pipelines 23 through a four-way element 242, so as to be connected to two energy storage clusters 1; the single-use secondary pipeline 22-1 is connected to one tertiary pipeline 23 through a three-way element 241, so that the single-use secondary pipeline 22-1 is connected to one energy storage cluster 1. By connecting one shared secondary pipeline 22-2 to two energy storage clusters 1 through the four-way element 242, the number of joints of the secondary pipeline 22 and the tertiary pipeline 23 can be reduced, which can reduce the cost on the one hand and improve the convenience of assembly on the other hand. Specifically, in Examples 1 and 2, a secondary pipeline 22 is connected to all heat exchange plates in an energy storage cluster 1 through a tertiary pipeline 23, and the number of heat exchange plates in each energy storage cluster 1 is Z, where Z=8; in Example 1, the number of joints between the secondary pipeline 22 and the tertiary pipeline 23 is Z*N1=8*N1=80; in this embodiment, the number of joints between the secondary pipeline 22 and the tertiary pipeline 23 is Z*N2=8*N2=48. Compared with Example 1, the number of joints between the secondary pipeline 22 and the tertiary pipeline 23 in this embodiment is reduced by 40%, specifically, by 32.

[0084] like Figure 4 The two energy storage clusters 1 connected by the shared secondary pipeline 22-2 are adjacent to each other, which can avoid the secondary pipelines 22 from crossing each other, thereby making the structure of the liquid cooling pipeline assembly 2 compact and convenient for maintenance.

[0085] The same as in Example 1 is: Figure 3 , Figure 4In this embodiment, five energy storage clusters 1 are arranged at intervals along a preset direction L, and an adjacent region 3 is formed between two adjacent energy storage clusters 1. In this embodiment, four adjacent regions 3 are formed between the five energy storage clusters 1. In other embodiments, multiple energy storage clusters 1 can be arranged along multiple preset directions, for example, arranged along two preset directions to form a two-dimensional arrangement; accordingly, at this time, at least three energy storage clusters 1 are adjacent, and multiple adjacent energy storage clusters 1 can form an adjacent region 3. For example, when multiple energy storage clusters 1 are arranged in two dimensions, four adjacent energy storage clusters 1 can form an adjacent region 3.

[0086] like Figure 4 The shared secondary pipeline 22-2 is arranged in the adjacent area 3 formed by two adjacent energy storage clusters 1. On the one hand, it can make the structure compact; on the other hand, it can make the distance from the shared secondary pipeline 22-2 to the corresponding two energy storage clusters 1 more even and smaller, which can reduce the length of the tertiary pipeline 23 and facilitate the connection of the tertiary pipeline 23 and the heat exchange plate with the same or similar length.

[0087] Furthermore, two of the four shared secondary pipelines 22-2 are shared secondary liquid inlet pipes 221-2, and the other two are shared secondary liquid return pipes 222-2. The four shared secondary pipelines 22-2 are respectively arranged at four adjacent areas 3, so that the energy storage clusters 1 connected to each shared secondary pipeline 22-2 are different. Figure 4 The two energy storage clusters 1, the third from the left (the third from the left) and the fourth from the left, have corresponding secondary liquid inlet pipes 221 of the secondary pipeline 22 of the fourth from the left, and the corresponding secondary liquid return pipes 222 of the secondary pipelines 22 of the third from the left and the fifth from the left respectively; by arranging that the energy storage clusters 1 corresponding to each secondary pipeline 22 are different, it is convenient to arrange the secondary liquid inlet pipe 221 at one end of the energy storage cluster 1 and the secondary liquid return pipe 222 at the other end, so as to simultaneously reduce the distances from the secondary liquid inlet pipe 221 and the secondary liquid return pipe 222 to the energy storage cluster 1, thereby simultaneously reducing the lengths of the tertiary liquid inlet pipe 231 and the tertiary liquid return pipe 232.

[0088] like Figure 3 , Figure 4 In this embodiment, the structures of the three-stage liquid inlet pipes 231 are the same, and the structures of the three-stage liquid return pipes 232 are the same. This arrangement makes it easy to manufacture the three-stage liquid inlet pipes 231 or the three-stage liquid return pipes 232 using the same mold or process, thereby reducing manufacturing costs.

[0089] Specifically, Figure 4The connection port 25 between the heat exchange plate and the tertiary pipeline 23 is close to both ends of the battery pack 11 along the L direction, so that the connection port 25 is close to the end of the energy storage cluster 1 to be close to the secondary pipeline 22 corresponding to the energy storage cluster 1, so as to reduce the distance from the connection port 25 to the secondary pipeline 22, which is convenient for the tertiary pipeline 23 and the secondary pipeline 22 to be connected to the end of the energy storage cluster 1 along the L direction. Further, the length of the tertiary pipeline 23 can be reduced.

[0090] Specifically, in this embodiment, a two-way control valve is also provided between each tertiary pipeline 23 and the corresponding heat exchange plate. On the one hand, one tertiary pipeline 23 can be controlled individually to control the heat exchange of the battery pack 11 corresponding to the tertiary pipeline 23, thereby improving the heat exchange accuracy of the heat exchange pipeline assembly 2; on the other hand, the flow at both ends is controlled by the two-way control valve, for example, closing either end to stop the flow, thereby facilitating maintenance of the battery pack 11 or the heat exchange pipeline assembly 2.

[0091] In this embodiment, as mentioned above, multiple battery packs 11 and corresponding heat exchange plates can be arranged in a cabinet or bracket to form a single energy storage cluster 1, and the primary pipeline 21 can be arranged in the surrounding environment of the energy storage cluster 1, such as the front and rear or upper and lower sides of the energy storage cluster 1, and the secondary pipeline 22 can be arranged in the gap between the energy storage clusters 1, or can also be fixed or integrated in the cabinet or bracket; the tertiary pipeline 23 can be fixed or integrated in the cabinet or bracket. In specific implementation, the pipelines at various levels can also be reasonably arranged as needed, and this application does not limit this.

[0092] Example 3

[0093] This embodiment provides an energy storage system. Figure 6-Figure 9 A structural diagram provided for this embodiment. The energy storage system 1000 includes a heat exchange pipeline assembly 2 and multiple energy storage clusters 1; the structure of a single energy storage cluster 1 and the arrangement of multiple energy storage clusters 1 in this embodiment are the same as those in Embodiment 1 and Embodiment 2, except that the number M3 of energy storage clusters 1 in this embodiment is an even number, specifically M3=6; the difference between the energy storage system in this embodiment and Embodiment 2 is mainly in the arrangement of the secondary pipeline 22 and the tertiary pipeline 23, and the specific arrangement of other structures such as the primary pipeline 21 of the heat exchange pipeline assembly 2 in this embodiment can refer to Embodiment 2.

[0094] Specifically, Figure 6 , Figure 7 In this embodiment, all the secondary pipelines 22 are shared secondary pipelines 22-2, each shared secondary pipeline 22-2 is respectively connected to two energy storage clusters 1, that is, each shared secondary pipeline 22-2 corresponds to two energy storage clusters 1, and the number of secondary pipelines 22 is N3=M3=6, of which three are shared secondary liquid inlet pipes 221-2, and three are shared secondary liquid return pipes 222-2.

[0095] In this embodiment, the heat exchange pipeline assembly 2 includes a four-way element 242 , and each secondary pipeline 22 is connected to two tertiary pipelines 23 through the same four-way element 242 to connect two energy storage clusters 1 , so that one four-way element 242 corresponds to two energy storage clusters 1 . The number of joints of the secondary pipeline 22 and the tertiary pipeline 23 is Z*N3=48. Compared with Example 2, it can be seen that by setting a common secondary pipeline 22-2 to connect two energy storage clusters 1, when the number of energy storage clusters 1 increases by one on the basis of an odd number and becomes an even number, on the one hand, the total number of secondary pipelines 22 remains unchanged, and the number of joints of the secondary pipeline 22 and the tertiary pipeline 23 remains unchanged, so that the average utilization rate of the secondary pipeline 22 becomes higher (average utilization rate of the secondary pipeline: the total number of energy storage clusters divided by the total number of secondary pipelines); on the other hand, the joints of the secondary pipeline 22 and the tertiary pipeline 23 can only use four-way elements 242, without the need for three-way elements, thereby reducing the types of joints, thereby simplifying the manufacturing cost of the heat exchange pipeline assembly 2 and the convenience of assembly and maintenance.

[0096] Furthermore, similar to Embodiment 1 and Embodiment 2, in this embodiment, all energy storage clusters 1 are arranged at intervals along the L direction, and an adjacent region 3 is formed between two adjacent energy storage clusters 1. Specifically, in this embodiment, six energy storage clusters 1 are arranged to form five adjacent regions 3. Figure 6 , Figure 7 , two adjacent energy storage clusters 1 correspond to the same shared secondary liquid inlet pipe 221-2 and the same shared secondary liquid return pipe 222-2, and the corresponding shared secondary liquid inlet pipe 221-2 and shared secondary liquid return pipe 222-2 are both arranged at the adjacent area 3 formed by the two energy storage clusters 1. In this arrangement, compared with Example 2, in the first aspect, the secondary pipeline 22 is not arranged at some adjacent areas 3 in this embodiment, which is convenient for reducing the length of the adjacent area 3 where the secondary pipeline 22 is not arranged along the L direction to make the structure compact, or convenient for the adjacent area 3 where the secondary pipeline 22 is not arranged to be used for other purposes, so that the arrangement of the energy storage system 1000 is flexible, for example, the adjacent area 3 where the secondary pipeline 22 is not arranged is used for arranging partition walls, etc.; in the second aspect, compared with the energy storage clusters 1 corresponding to the same secondary liquid inlet pipe 221 in Example 2 corresponding to different secondary liquid return pipes 222, in this embodiment, multiple energy storage clusters 1 corresponding to the same secondary liquid inlet pipe 221 correspond to the same secondary liquid return pipe 222, which is convenient for simplifying the flow control logic of the heat exchange pipeline assembly 2. In addition, when the energy storage clusters 1 are arranged in rows with an even number of energy storage clusters 1 in one row, the energy storage clusters 1 corresponding to different secondary liquid return pipes 222 are arranged compared to the energy storage clusters 1 corresponding to the same secondary liquid inlet pipe 221. Such an arrangement can reduce the total number of secondary pipelines 22 (the beneficial effects here can be specifically referred to Example 4), and only one specification of secondary liquid inlet pipe 221 and one specification of secondary liquid return pipe 222 can be used, which is convenient for manufacturing and assembly.

[0097] In this embodiment, the shared secondary liquid inlet pipe 221-2 and the shared secondary liquid return pipe 222-2 corresponding to the same energy storage cluster 1 are arranged in the same adjacent area 3, so that one of the liquid inlet and the liquid outlet of the heat exchange plate is close to the adjacent area 3 and the other is far away from the adjacent area 3, so that one of the two tertiary pipelines 23, the tertiary liquid inlet pipe 231 and the tertiary liquid return pipe 232, is longer. Fig. 9 In this embodiment, the liquid inlet of the heat exchange plate is arranged to be far away from the secondary pipeline 22 relative to the liquid outlet, so that the corresponding tertiary liquid inlet pipe 231 is longer. Compared with this embodiment, in embodiment 2, the secondary liquid inlet pipe 221 and the secondary liquid return pipe 222 are staggered along the L direction, so that each secondary pipeline 22 corresponds to a different energy storage cluster 1, and the total length of the tertiary pipeline 23 can be reduced.

[0098] Example 4

[0099] This embodiment provides an energy storage system. Fig.10 A schematic diagram of the structure provided for this embodiment. The energy storage system 1000 includes a heat exchange pipeline assembly 2 and a plurality of energy storage clusters 1; the structure of a single energy storage cluster 1 in this embodiment is the same as that in Embodiment 1, Embodiment 2 and Embodiment 3; the number M4 of energy storage clusters 1 in this embodiment is the same as that in Embodiment 3, which is an even number, specifically M4=M3=6; M4 energy storage clusters 1 are arranged at intervals along a preset direction L to form M4-1 adjacent areas 3, specifically, six energy storage clusters 1 form five adjacent areas 3.

[0100] The arrangement of the heat exchange pipeline assembly 2 in this embodiment is similar to that in Embodiment 2, and all the secondary pipelines 22 are arranged in a staggered manner along the L direction, so that the energy storage clusters 1 connected to each secondary pipeline 22 are different. Specifically, Fig.10 The X4 (X4=5) shared secondary pipelines 22-2 in the middle are respectively connected to Y4 (Y4=2) energy storage clusters 1, so that the X4 secondary pipelines 22 correspond to Y4 energy storage clusters 1 respectively; the secondary pipelines 22 on the left and right sides are single-use secondary pipelines 22-1, which are respectively connected to one energy storage cluster 1; the number of secondary pipelines 22 N4=2M4-(Y4-1)X4=7=N3+1.

[0101] The number of energy storage clusters 1 in this embodiment and embodiment 3 is an even number and the number is the same, and the arrangement form of multiple energy storage clusters 1 is also consistent. Compared with the energy storage clusters 1 connected to the same shared secondary liquid inlet pipe 221-2 in this embodiment, which are connected to different secondary liquid return pipes 222, in embodiment 3, by setting the energy storage clusters 1 connected to the same shared secondary liquid inlet pipe 221-2 to be connected to the same secondary liquid return pipe 222, on the first hand, the total number of secondary pipelines 22 can be reduced, and embodiment 3 specifically reduces one secondary pipeline 22 compared with this embodiment; on the second hand, in this embodiment, a single secondary pipeline 22-1 is used to connect one energy storage cluster 1, and a three-way element can be used for connection, and a shared secondary pipeline 22-2 is used to connect two energy storage clusters 1, and a four-way element can be used for connection. In embodiment 3, each secondary pipeline 22 is a shared secondary pipeline 22-2, and can be connected only by a four-way element, thereby reducing the type of joints between the secondary pipeline 22 and the tertiary pipeline.

[0102] Example 5

[0103] This embodiment provides a heat exchange plate, such as Fig.11 As shown, the heat exchange plate 12 of this embodiment has a heat exchange plate body 121, which is a plate-like structure. Two interfaces are provided on the outer side of the heat exchange plate 121, one is a liquid inlet 122, which is used to connect with the third-level liquid inlet pipe of the heat exchange pipeline assembly, and the other is a liquid outlet 123, which is used to connect with the third-level liquid return pipe of the heat exchange pipeline assembly. The heat exchange plate body 121 has a heat exchange channel connecting the liquid inlet 122 and the liquid outlet 123. Fig.11 The dotted lines in FIG. 1 indicate the outline of the heat exchange channel inside the heat exchange plate body 121 . Fig.11 The portion indicated by the dotted line is symmetrical, and the dot-dash line indicates the axis of symmetry, which is perpendicular to the L direction. By setting a symmetrical design of the heat exchange channel in the heat exchange plate 12, the resistance of the liquid in the heat exchange plate 12 is equal for the forward flow (flow from the liquid inlet to the liquid outlet) and the reverse flow (flow from the liquid outlet to the liquid inlet). When the heat exchange plate 12 of this embodiment is applied to the energy storage system provided in embodiments 2-4 or other embodiments, and multiple energy storage clusters in the energy storage system are arranged along the L direction, because the resistance of the forward flow and the reverse flow in the heat exchange plate are close, the secondary pipeline can be arranged at either end of the battery pack along the L direction, reducing the position requirements for the secondary pipeline, so that the layout of the energy storage system is flexible. In other embodiments, the heat exchange plate can be set to a partially symmetrical structure so that the resistance of the forward flow and the reverse flow of the liquid in the heat exchange plate are close.

[0104] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications all fall within the protection scope of the utility model.

Claims

1. An energy storage system, characterized in that: It includes: A plurality of energy storage clusters, wherein the energy storage clusters include: multiple battery packs; and A plurality of heat exchange plates are arranged corresponding to the plurality of battery packs; and A heat exchange pipeline assembly, the heat exchange pipeline assembly comprising: A primary pipeline connected to the heat exchange unit and the heat exchange pump of the energy storage system; a secondary pipeline, the secondary pipeline being connected to the primary pipeline; A tertiary pipeline, one end of which is connected to the heat exchange plate, and the other end of which is connected to the secondary pipeline; The secondary pipeline is connected to the heat exchange plate through the tertiary pipeline to be connected to the energy storage cluster. At least part of the secondary pipeline is a common secondary pipeline, and the same common secondary pipeline is connected to multiple energy storage clusters.

2. The energy storage system according to claim 1, characterized in that: There are multiple first-level pipelines, one part of which is a first-level liquid inlet pipe and the other part is a first-level liquid return pipe; there are multiple second-level pipelines, one part of which is a second-level liquid inlet pipe and the other part is a second-level liquid return pipe; there are multiple third-level pipelines, one part of which is a third-level liquid inlet pipe and the other part is a third-level liquid return pipe; The liquid inlet of the heat exchange plate is connected to the third-level liquid inlet pipe, the third-level liquid inlet pipe is connected to the second-level liquid inlet pipe, and the second-level liquid inlet pipe is connected to the first-level liquid inlet pipe; The liquid outlet of the heat exchange plate is connected to the tertiary liquid return pipe, the tertiary liquid return pipe is connected to the secondary liquid return pipe, and the secondary liquid return pipe is connected to the primary liquid return pipe.

3. The energy storage system according to claim 1, characterized in that: The multiple energy storage clusters connected by the common secondary pipeline are adjacent.

4. The energy storage system according to claim 3, characterized in that: The plurality of energy storage clusters are arranged at intervals along at least one preset direction, and adjacent regions are formed between adjacent plurality of energy storage clusters; The common secondary pipeline is arranged at the adjacent area formed by the plurality of adjacent energy storage clusters connected by the common secondary pipeline.

5. The energy storage system according to claim 4, characterized in that: The number of the shared secondary pipelines is multiple, one part is a shared secondary liquid inlet pipe, the other part is a shared secondary liquid return pipe, and the number of the adjacent areas is multiple; The common secondary liquid inlet pipe and the common secondary liquid return pipe are arranged at different adjacent areas to be connected to different energy storage clusters; or, the common secondary liquid inlet pipe and the common secondary liquid return pipe are arranged at the same adjacent areas to be connected to the same energy storage cluster, and the secondary pipeline is not arranged at some of the adjacent areas.

6. The energy storage system according to claim 1, characterized in that: The heat exchange channels in the heat exchange plate are symmetrically designed, and / or the connection port between the heat exchange plate and the tertiary pipeline is arranged close to the secondary pipeline to which the heat exchange plate is connected via the tertiary pipeline.

7. The energy storage system according to claim 1, characterized in that: The energy storage system further comprises a two-way control valve, and the tertiary pipeline and the heat exchange plate are connected via the two-way control valve.

8. The energy storage system according to claim 1, characterized in that: There are multiple three-stage pipelines, one part is a three-stage liquid inlet pipe, and the other part is a three-stage liquid return pipe; Any two of the three-stage liquid inlet pipes have the same structure; And / or, any two tertiary liquid return pipes have the same structure.

9. The energy storage system according to any one of claims 1 to 8, characterized in that: The plurality of energy storage clusters are arranged along a preset direction, and two adjacent energy storage clusters are connected to the same shared secondary pipeline.

10. The energy storage system according to claim 1, characterized in that: The energy storage system further comprises a four-way element having four passage openings, and the shared secondary pipeline is connected to two tertiary pipelines through one of the four-way elements so as to be connected to two energy storage clusters.

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