energy storage system

Abstract

This application discloses an energy storage system, relating to the field of energy storage technology. The energy storage system includes a housing, and an energy storage converter, a liquid cooling system, and a battery cluster installed inside the housing. The energy storage converter is located above the battery cluster and has a liquid cooling interface and terminals. The energy storage converter is connected to the liquid cooling system through the liquid cooling interface and electrically connected to the battery cluster through a wiring harness connected to the terminals. The liquid cooling interface is located above the terminals and the wiring harness. The energy storage system disclosed in this application has a more rational layout of its components, effectively avoiding interference between the wiring harness and the liquid cooling piping, and improving the overall heat dissipation of the system.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to an energy storage system. Background Technology

[0002] AC / DC integrated energy storage systems are energy storage solutions that integrate DC-side battery cells with AC-side power conversion systems (such as energy storage converters). In recent years, they have received widespread attention and rapid development in the field of energy storage.

[0003] Energy storage converters need to be connected to corresponding battery cells to achieve bidirectional energy conversion. However, since energy storage converters generate heat during operation, they require liquid cooling lines for cooling. Therefore, the wiring harnesses connected to the energy storage converters can interfere with the liquid cooling lines located near the converters, resulting in a cluttered overall interface for the energy storage system. Furthermore, at the points of interference, the wiring harnesses will be in close contact with the liquid cooling lines, causing heat from the harnesses to be conducted to the liquid cooling lines, leading to reduced cooling efficiency. Utility Model Content

[0004] In view of this, this application provides an energy storage system with a more reasonable layout of components, which effectively avoids interference between wiring harnesses and liquid cooling pipelines and improves the overall heat dissipation of the system.

[0005] The specific technical solution adopted in this application is as follows:

[0006] An energy storage system includes a housing, and an energy storage converter, a liquid cooling system, and a battery cluster installed inside the housing;

[0007] The energy storage converter is located above the battery cluster. The energy storage converter has a liquid cooling interface and a terminal block. The energy storage converter is connected to the liquid cooling system through the liquid cooling interface and is electrically connected to the battery cluster through a wire harness connected to the terminal block.

[0008] The liquid cooling interface is located above the wiring terminal and the wiring harness.

[0009] Optionally, the interior of the housing is divided into a battery compartment and an electrical compartment;

[0010] The energy storage converter and the battery cluster are located inside the battery compartment, wherein the energy storage converter is arranged on top of the battery cluster, and the liquid cooling interface is located on the side of the wiring terminal away from the battery cluster;

[0011] At least a portion of the liquid cooling system is located within the electrical compartment.

[0012] Optionally, the liquid cooling system includes a liquid cooling unit and liquid cooling pipelines, the liquid cooling unit being located inside the electrical compartment, and the liquid cooling pipelines being connected to the liquid cooling unit;

[0013] The liquid cooling pipeline has a connecting pipe section located within the battery compartment and used to communicate with the liquid cooling interface, the connecting pipe section being located on the side of the terminal block away from the battery cluster.

[0014] Optionally, the orthographic projections of the terminals and the wiring harness on the set plane are spaced apart from the orthographic projections of the connecting pipe segment on the set plane;

[0015] The designated plane is parallel to the height and length directions of the outer shell, and perpendicular to the width direction of the outer shell.

[0016] Optionally, the energy storage converter includes a housing and an energy storage converter unit;

[0017] The housing includes a liquid cooling plate located on the side of the wiring terminals away from the battery cluster, and has the liquid cooling interface;

[0018] The energy storage converter is located inside the housing and is in thermal contact with the liquid cooling plate.

[0019] Optionally, one side panel of the enclosure is the liquid cooling plate; or,

[0020] The enclosure includes a shell body and a liquid cooling plate, the liquid cooling plate being located between the shell body and the energy storage converter unit, and the liquid cooling interface passing through the shell body and protruding from the outside of the shell body.

[0021] Optionally, the orthographic projection of the connecting pipe segment on the set plane and the orthographic projection of the liquid cooling plate on the set plane are adjacent to each other or have a gap;

[0022] The designated plane is parallel to the height and length directions of the outer shell, and perpendicular to the width direction of the outer shell.

[0023] Optionally, the number of energy storage converters is multiple, and the number of battery clusters is multiple;

[0024] The battery compartment includes multiple compartments arranged in an array, and multiple energy storage converters and multiple battery clusters are respectively arranged in the multiple compartments;

[0025] In this configuration, an energy storage converter and a battery cluster that are electrically connected to each other are arranged in multiple compartments located in the same column, and multiple energy storage converters are arranged in multiple compartments located in the same row.

[0026] Optionally, the connecting pipe section of the liquid cooling pipeline extends along the row direction of the plurality of compartments and is respectively connected to the liquid cooling interface of the plurality of energy storage converters.

[0027] Optionally, the connecting pipe section is fixed to the first edge of the compartment where the energy storage converter is located;

[0028] At least one wire harness buckle is provided at the second edge of the compartment where the energy storage converter is located;

[0029] The first edge and the second edge are the two opposite edges of the compartment where the energy storage converter is located in the height direction of the outer shell.

[0030] In the energy storage system provided in this embodiment, the liquid-cooled interface of the energy storage converter is located above the terminal block. Therefore, the connection between the energy storage converter and the liquid cooling system is also located above the terminal block. Simultaneously, the battery cluster is located below the energy storage converter. When wiring the energy storage converter and the battery cluster, one end of the wiring harness connects to the energy storage converter, and the other end extends downwards and connects to the battery cluster. Therefore, it does not interfere with the liquid-cooled interface and the connection to the liquid cooling system located above, thus avoiding a cluttered system interface layout and preventing the heat from the wiring harness from affecting the cooling efficiency of the liquid cooling system. Therefore, the energy storage system provided in this embodiment has a more rational layout of its components, effectively avoiding interference between the wiring harness and the liquid cooling system, and improving the overall heat dissipation of the system. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the internal overall layout of an energy storage system provided in an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the layout around the energy storage converter in the energy storage system provided in the embodiments of this application;

[0034] Figure 3 This is a schematic diagram showing the arrangement of the liquid cooling plate in an energy storage converter according to an embodiment of this application;

[0035] Figure 4 This is a schematic diagram showing the arrangement of the liquid cooling plate in another energy storage converter provided in this application embodiment;

[0036] Figure 5This is a schematic diagram showing the arrangement of the liquid cooling plate in another type of energy storage converter provided in this application embodiment.

[0037] Figure label:

[0038] 1. Outer shell; 11. Battery compartment; 111. Compartment; 1111. First edge; 1112. Second edge; 12. Electrical compartment;

[0039] 2. Energy storage converter; 21. Liquid cooling interface; 22. Terminal block; 23. Enclosure; 231. Liquid cooling plate; 232. Enclosure body; 24. Energy storage converter unit;

[0040] 3. Liquid cooling system; 31. Liquid cooling unit; 32. Liquid cooling piping; 321. Connecting pipe section;

[0041] 4. Battery clusters;

[0042] 5. Wiring harness;

[0043] 6. Cable tie. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0046] This application provides an energy storage system, also known in the art as an "AC / DC energy storage system," "AC / DC integrated energy storage system," or "AC / DC integrated power supply system." This energy storage system optimizes the overall performance, efficiency, and safety of the energy storage system by integrating the DC-side battery cells and the AC-side power conversion system in both structure and function. The aforementioned power conversion system can be, for example, a power conversion system (PCS).

[0047] Figure 1 This is a schematic diagram showing the overall layout of the main internal components of the energy storage system provided in the embodiments of this application. For example... Figure 1 As shown, the energy storage system provided in this application embodiment includes a housing 1, and an energy storage converter 2, a liquid cooling system 3, and a battery cluster 4 installed inside the housing 1.

[0048] The energy storage converter 2 can convert DC power to AC power or vice versa through bidirectional converter technology, thereby realizing the bidirectional flow and conversion of electrical energy between the battery cluster 4 and the power grid.

[0049] It should be understood that each battery cluster 4 includes at least one battery module. Each battery module consists of at least two cells connected in series, with the cells connected in series to increase voltage or in parallel to increase current. When the battery cluster 4 includes multiple battery modules, these battery modules are combined in series, parallel, or series-parallel configurations. Each battery cluster 4 is also typically equipped with a battery management system, detection and protection circuits, electrical and communication interfaces, and other components.

[0050] In this embodiment, the energy storage converter 2 is located above the battery cluster 4. The energy storage converter 2 and the battery cluster 4 can be arranged directly opposite each other in the height direction of the outer casing 1, or they can be staggered, as long as the height of the energy storage converter 2 in space is higher than the height of the battery cluster 4. It should be understood that energy storage systems are typically arranged on the ground or other reference planes. In three-dimensional space, along a direction perpendicular to the reference plane, the farther an object is from the reference plane, the higher its height; the closer an object is to the reference plane, the lower its height. Higher objects are located above lower objects.

[0051] like Figure 2 As shown, the energy storage converter 2 has a liquid cooling interface 21 and a terminal block 22. The energy storage converter 2 is connected to the liquid cooling system 3 through the liquid cooling interface 21, so that the liquid cooling system 3 can provide a cooling effect for the energy storage converter 2. The energy storage converter 2 is electrically connected to the battery cluster 4 through the wire harness 5 connected to the terminal block 22, thereby realizing the bidirectional flow and conversion of electrical energy.

[0052] The liquid cooling interface 21 is located above the terminal block 22 and the wiring harness 5. Consequently, the connection point between the liquid cooling interface 21 and the liquid cooling system 3 is also located above the terminal block 22 and the wiring harness 5. Since the wiring harness 5 connected to the energy storage converter 2 extends downward to connect to the corresponding battery cluster 4, the position and extension direction of the wiring harness 5 are far away from the connection point between the liquid cooling interface 21 and the liquid cooling system 3, thereby avoiding interference between the wiring harness 5 and the liquid cooling system 3.

[0053] Therefore, the energy storage system provided in this application embodiment effectively avoids interference between the wire harness 5 and the liquid cooling system 3 by adjusting the relative positions of the liquid cooling interface 21 and the terminal block 22, thereby changing the connection position between the liquid cooling interface 21 and the liquid cooling system 3, as well as the extension direction of the wire harness 5 connected to the terminal block 22. In other words, the energy storage system provided in this application embodiment, by making the layout of its components more reasonable, avoids a series of problems and risks caused by interference between the wire harness 5 and the liquid cooling system 3, and improves the overall neatness and heat dissipation of the system.

[0054] In some embodiments of this application, the outer casing 1 of the energy storage system is hollow, and its interior can be divided into a battery compartment 11 and an electrical compartment 12 using partitions or other components, for accommodating electrical equipment with different functions. For example... Figure 1 and Figure 2 As shown, the energy storage converter 2 and the battery cluster 4 are located in the battery compartment 11, wherein the energy storage converter 2 is arranged on top of the battery cluster 4, and the liquid cooling interface 21 is located on the side of the terminal block 22 away from the battery cluster 4; at least a portion of the liquid cooling system 3 is located in the electrical compartment 12.

[0055] By arranging both the energy storage inverter 2 and the battery cluster 4 within the battery compartment 11, the distance between them is reduced. Furthermore, by placing the energy storage inverter 2 on top of its corresponding battery cluster 4, the wiring harness 5 connected to the energy storage inverter 2 can extend downwards and connect to the battery cluster 4 nearby. This improves the wiring convenience of the energy storage inverter 2 and the battery cluster 4, reduces the wiring length of the wiring harness 5, saves costs, and improves wiring neatness.

[0056] The liquid cooling interface 21 is located on the side of the terminal block 22 away from the battery cluster 4, which facilitates the connection of the liquid cooling interface 21 to the liquid cooling system 3 above or upward from the terminal block 22. This keeps the connection point between the liquid cooling interface 21 and the liquid cooling system 3 away from the terminal block 22 and the wiring harness 5, thus avoiding interference between the wiring harness 5 and the liquid cooling system 3.

[0057] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the liquid cooling system 3 includes a liquid cooling host 31 and a liquid cooling pipeline 32. The liquid cooling host 31 is located inside the electrical compartment 12, and the liquid cooling pipeline 32 is connected to the liquid cooling host 31.

[0058] The liquid cooling pipe 32 can be located entirely within the battery compartment 11 and connected to the liquid cooling host 31 via an interface or external pipe; or, the liquid cooling pipe 32 can penetrate the partition, thus having a portion located within the battery compartment 11 and a portion located within the electrical compartment 12, the portion located within the electrical compartment 12 being connected to the liquid cooling host 31.

[0059] like Figure 2 As shown, the liquid cooling pipeline 32 has a connecting pipe section 321 located inside the battery compartment 11 and used to connect to the liquid cooling interface 21. The liquid cooling host 31 supplies coolant to the energy storage converter 2 through this connecting pipe section 321 of the liquid cooling pipeline 32, thereby exchanging heat with the energy storage converter 2 to achieve cooling of the energy storage converter 2.

[0060] The connecting pipe segment 321 is located on the side of the terminal block 22 away from the battery cluster 4. Therefore, the orthographic projections of the terminal block 22 and the wiring harness 5 on the setting plane are spaced apart from the orthographic projections of the connecting pipe segment 321 on the setting plane. The setting plane is parallel to the height and length directions of the housing 1 and perpendicular to the width direction of the housing 1.

[0061] Since the connecting pipe section 321 connected to the energy storage converter 2 is located on the side of the terminal 22 away from the battery cluster 4, it will not interfere with the wire harness 5 located on the side of the terminal 22 closer to the battery cluster 4. Therefore, it avoids a messy interface layout of the energy storage system and also avoids the heat of the wire harness 5 being directly transferred to the liquid cooling pipe 32, which would affect the cooling efficiency of the liquid cooling pipe 32 for the energy storage converter 2.

[0062] In some embodiments of this application, such as Figure 3 , Figure 4 and Figure 5 As shown, the energy storage converter 2 includes a housing 23 and an energy storage converter unit 24, which is located inside the housing 23.

[0063] The energy storage converter unit 24 is the core functional unit of the energy storage converter 2. Optionally, the energy storage converter unit 24 may include a power conversion module, a control module, an interface circuit, a protection circuit, a communication module, etc. When the energy storage converter 2 is working, the energy storage converter unit 24 generates a lot of heat, which needs to be dissipated in a timely manner; otherwise, it may affect the working stability, efficiency, and lifespan of the energy storage converter unit 24.

[0064] In this embodiment, the housing 23 includes a liquid-cooled plate 231, which is in thermal contact with the energy storage converter unit 24. The liquid-cooled plate 231 has a liquid-flow channel (not shown in the figure) inside, and it also has a liquid-cooling interface 21 that communicates with the liquid-flow channel. When the liquid-cooled plate 231 is connected to the liquid-cooling system 3 via the liquid-cooling interface 21, the coolant can circulate through the liquid-cooling interface 21 in the liquid-flow channel, thereby carrying away the heat generated during the operation of the energy storage converter unit 24, achieving a cooling effect.

[0065] In some embodiments, the liquid cooling plate 231 is part of the housing 23 of the energy storage converter 2, for example, one side panel. Figure 3 As shown, the top plate of the housing 23 has the aforementioned liquid passage and liquid cooling interface 21, thus forming a liquid cooling plate 231. The energy storage converter 24 is fixed to this top plate to achieve installation and thermal contact, thereby facilitating heat exchange with the coolant flowing in the liquid passage of the top plate.

[0066] In other embodiments, such as Figure 4 and Figure 5 As shown, the housing 23 of the energy storage converter 2 includes a housing body 232 and a liquid cooling plate 231. The energy storage converter unit 24 is installed inside the housing body 232 and connected to one of the housing plates to achieve installation and fixation.

[0067] If the thermal conductivity of the shell body 232 is good, such as Figure 4 As shown, the liquid cooling plate 231 can be connected to the outside of the housing body 232, for example, to the outer surface of the box plate on which the energy storage converter unit 24 is fixed. This allows the heat generated by the energy storage converter unit 24 during operation to be transferred through the housing body 232 to the liquid cooling plate 231 for rapid dissipation. In this design, since the liquid cooling plate 231 is installed on the outside of the housing body 232, installation is convenient.

[0068] When the thermal conductivity of the shell body 232 is poor, such as Figure 5 As shown, the liquid cooling plate 231 can be installed inside the housing body 232, positioned between the energy storage converter unit 24 and the housing body 232, so that the energy storage converter unit 24 directly contacts the liquid cooling plate 231, improving heat dissipation efficiency. In this case, the liquid cooling interface 21 on the liquid cooling plate 231 can pass through the through hole provided on the housing body 232, thus being exposed on the outside of the housing body 232 for connection with the liquid cooling pipeline 32.

[0069] It should be understood that, in the embodiments of this application, the liquid cooling interface 21 being "exposed" from the outside of the shell body 232 includes both the case where a part of the liquid cooling interface 21 extends out of the shell body 232 and is located outside the shell body 232, and the case where the liquid cooling interface 21 is flush with the shell body 232 and can be seen from the outside of the shell body 232.

[0070] In some embodiments of this application, the housing 1 of the energy storage system has an open side from which the energy storage converter 2, battery cluster 4, liquid cooling system 3, and other devices in the energy storage system are assembled into the housing 1. Furthermore, after the energy storage converter 2 is installed into the battery compartment 11, its terminals 22 are exposed from the open side. The housing 1 of the energy storage system also includes at least one door that can close the open side of the housing 1.

[0071] Optionally, after the energy storage converter 2 is installed into the battery compartment 11, the liquid cooling interface 21 is also exposed from the open side of the outer casing 1. That is, the liquid cooling interface 21 is located on the side of the liquid cooling plate 231 facing the open side, so as to facilitate connection with the liquid cooling pipeline 32, while avoiding interference with the wall of the battery compartment 11.

[0072] In some embodiments, the connecting pipe section 321 of the liquid cooling pipeline 32 is disposed on the open side of the housing 1 and is fixedly connected to the housing 1, thereby facilitating connection with the liquid cooling interface 21 of the energy storage converter 2. The orthographic projection of the connecting pipe section 321 on the set plane is adjacent to or spaced from the orthographic projection of the liquid cooling plate 231 on the set plane. Therefore, when the energy storage converter 2 is assembled through the open side of the housing 1, the liquid cooling plate 231 will not interfere with the connecting pipe section 321, thus facilitating the installation of the energy storage converter 2.

[0073] See also Figure 1 In some embodiments of this application, the energy storage system includes multiple energy storage converters 2 and multiple battery clusters 4; the battery compartment 11 includes multiple compartments 111 arranged in an array, and the multiple energy storage converters 2 and multiple battery clusters 4 are respectively housed and arranged in the multiple compartments 111. Among them, an energy storage converter 2 and a battery cluster 4 that are electrically connected to each other are arranged in multiple compartments 111 located in the same column, and multiple energy storage converters 2 are arranged in multiple compartments 111 located in the same row.

[0074] By arranging the electrically connected battery clusters 4 and energy storage inverters 2 in the same column compartment 111 and multiple energy storage inverters 2 in the same row compartment 111, the spatial layout of the battery compartment 11 is optimized, achieving close cooperation between the battery clusters 4 and the energy storage inverters 2. This saves space and facilitates integration with the liquid cooling system 3. Furthermore, configuring one energy storage inverter 2 for each battery cluster 4 enables independent management of each cluster, effectively solving the battery inconsistency problem and extending battery life. Therefore, this embodiment, by adopting the above layout method, improves the rationality and neatness of the layout of the energy storage inverters 2 and battery clusters 4 within the housing 1, and contributes to improving system efficiency, safety, flexibility, and reliability.

[0075] Accordingly, since multiple energy storage converters 2 are arranged in multiple compartments 111 located in the same row, the connecting pipe section 321 of the liquid cooling pipe 32 can be extended along the row direction of the multiple compartments 111, so that the connecting pipe section 321 can be connected to the liquid cooling interface 21 of the multiple energy storage converters 2 respectively, thus optimizing the space utilization of the liquid cooling pipe 32 and saving its arrangement space.

[0076] In some embodiments of this application, the connecting pipe segment 321 can be fixed to the first edge 1111 of the compartment 111 where the energy storage converter 2 is located; at least one wire harness buckle 6 is provided at the second edge 1112 of the compartment 111 where the energy storage converter 2 is located. The wire harness buckle 6 is used to constrain the position of the wire harness 5 connected to the energy storage converter 2 and improve the neatness of the wiring. The first edge 1111 and the second edge 1112 are two opposite edges of the compartment 111 where the energy storage converter 2 is located in the height direction of the outer shell 1.

[0077] For example, the first edge 1111 is the upper edge of the compartment 111 where the energy storage converter 2 is located, and the second edge 1112 is the lower edge of the compartment 111 where the energy storage converter 2 is located. By fixing the connecting pipe section 321 at the upper edge of the compartment 111 where the energy storage converter 2 is located, and using the wire harness buckle 6 to constrain the wire harness 5 to run along the lower edge of the compartment 111 where the energy storage converter 2 is located, the wire harness 5 is kept away from the connecting pipe section 321, thus avoiding interference between the two.

[0078] In summary, the energy storage system provided in this application embodiment, by placing the liquid cooling interface 21 above the terminal block 22 during the installation of the energy storage converter 2, and installing the connecting pipe section 321 of the liquid cooling pipeline 32 on the upper edge of the compartment 111 where the energy storage converter 2 is located, and by connecting the wiring harness 5 connected to the energy storage converter 2 downwards to the battery cluster 4, achieves mutual avoidance and non-interference installation of the liquid cooling pipeline 32 and the wiring harness 5, improves the overall interface neatness of the energy storage system on the open side of the outer casing 1, and avoids the reduction in cooling efficiency caused by the heat generated by the wiring harness 5 being conducted to the liquid cooling pipeline 32.

[0079] Meanwhile, since heat tends to flow upwards, placing the connecting section of the liquid cooling plate 231 and the liquid cooling pipe 32 above the energy storage converter unit 24 helps the coolant to carry away more heat during circulation, thereby improving the overall heat dissipation efficiency of the energy storage system.

[0080] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0081] The above description is only for the purpose of enabling those skilled in the art to understand the technical solution of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage system, characterized by, The energy storage system includes an outer casing (1), and an energy storage converter (2), a liquid cooling system (3), and a battery cluster (4) installed inside the outer casing (1); The energy storage converter (2) is located above the battery cluster (4). The energy storage converter (2) has a liquid cooling interface (21) and a terminal block (22). The energy storage converter (2) is connected to the liquid cooling system (3) through the liquid cooling interface (21) and is electrically connected to the battery cluster (4) through a wire harness (5) connected to the terminal block (22). The liquid cooling interface (21) is located above the terminal block (22) and the wire harness (5).

2. The energy storage system of claim 1, wherein, The interior of the outer casing (1) is divided into a battery compartment (11) and an electrical compartment (12); The energy storage converter (2) and the battery cluster (4) are located inside the battery compartment (11), wherein the energy storage converter (2) is arranged on top of the battery cluster (4), and the liquid cooling interface (21) is located on the side of the terminal block (22) away from the battery cluster (4); At least a portion of the liquid cooling system (3) is located within the electrical compartment (12).

3. The energy storage system of claim 2, wherein, The liquid cooling system (3) includes a liquid cooling host (31) and liquid cooling pipes (32). The liquid cooling host (31) is located inside the electrical compartment (12), and the liquid cooling pipes (32) are connected to the liquid cooling host (31). The liquid cooling pipeline (32) has a connecting pipe section (321) located inside the battery compartment (11) and used to communicate with the liquid cooling interface (21). The connecting pipe section (321) is located on the side of the terminal block (22) away from the battery cluster (4).

4. The energy storage system of claim 3, wherein, The orthographic projections of the terminal block (22) and the wire harness (5) on the set plane are spaced apart from the orthographic projections of the connecting pipe section (321) on the set plane; The set plane is parallel to the height and length directions of the outer shell (1) and perpendicular to the width direction of the outer shell (1).

5. The energy storage system of claim 3, wherein, The energy storage converter (2) includes a housing (23) and an energy storage converter unit (24); The housing (23) includes a liquid cooling plate (231) located on the side of the terminal block (22) away from the battery cluster (4) and has the liquid cooling interface (21); The energy storage converter (24) is located inside the housing (23) and is in thermal contact with the liquid cooling plate (231).

6. The energy storage system of claim 5, wherein, One side panel of the casing (23) is the liquid cooling plate (231); or, The enclosure (23) includes a shell body (232) and a liquid cooling plate (231). The liquid cooling plate (231) is located between the shell body (232) and the energy storage converter (24). The liquid cooling interface (21) passes through the shell body (232) and is exposed from the outside of the shell body (232); or, the liquid cooling plate (231) is connected to the outside of the shell body (232).

7. An energy storage system according to claim 5 or 6, characterised in that, The orthographic projection of the connecting pipe section (321) on the set plane and the orthographic projection of the liquid cooling plate (231) on the set plane are adjacent or spaced apart; The set plane is parallel to the height and length directions of the outer shell (1) and perpendicular to the width direction of the outer shell (1).

8. The energy storage system of claim 3, wherein, The number of energy storage converters (2) is multiple, and the number of battery clusters (4) is multiple; The battery compartment (11) includes multiple compartments (111) arranged in an array, and multiple energy storage converters (2) and multiple battery clusters (4) are respectively arranged in the multiple compartments (111); Among them, an energy storage converter (2) and a battery cluster (4) that are electrically connected to each other are arranged in a plurality of compartments (111) located in the same column, and a plurality of energy storage converters (2) are arranged in a plurality of compartments (111) located in the same row.

9. The energy storage system of claim 8, wherein, The connecting pipe section (321) of the liquid cooling pipeline (32) extends along the row direction of the plurality of compartments (111) and is connected to the liquid cooling interface (21) of the plurality of energy storage converters (2) respectively.

10. The energy storage system of claim 8 or 9, wherein, The connecting pipe section (321) is fixed to the first edge (1111) of the compartment (111) where the energy storage converter (2) is located; At least one wire harness (6) is provided at the second edge (1112) of the compartment (111) where the energy storage converter (2) is located; The first edge (1111) and the second edge (1112) are the two opposite edges of the compartment (111) where the energy storage converter (2) is located in the height direction of the outer shell (1).

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