Energy storage cabinet

Abstract

The embodiment of the utility model provides an energy storage cabinet which comprises a cabinet body and battery clusters, a power converter and a cluster control box which are located in the cabinet body, and the cluster control box and the power converter are stacked on at least two battery clusters from bottom to top. A shell of the cluster control box is provided with at least two pairs of first power input interfaces and at least two pairs of first power output interfaces, each pair of first power input interfaces is electrically connected with one battery cluster, and each pair of first power output interfaces is electrically connected with the power converter; the cluster control box is provided with at least two pairs of first power input interfaces and first power output interfaces, so that at least one cluster control box can be saved, the cost is saved, the system design can be simplified, the complexity of wiring and connection is reduced, and the overall complexity of the system and the number of fault points are reduced. The convenience and accuracy of synchronous scheduling of at least two rows of battery clusters can be improved, and unified scheduling and monitoring are facilitated.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to an energy storage cabinet. Background Technology

[0002] In related technologies, each battery pack in the energy storage cabinet is equipped with a cluster control box, which is used to control the battery pack. However, when there are a large number of battery packs in the energy storage cabinet, it will lead to complex wiring and connection of the entire system, and it will also easily lead to low convenience and accuracy of unified scheduling between multiple battery packs, which is not conducive to the energy storage cabinet to play its best performance in storing or discharging electrical energy. Utility Model Content

[0003] Embodiments of this application provide an energy storage cabinet to improve the safety performance of the cluster control box while facilitating assembly.

[0004] In a first aspect, embodiments of this application provide an energy storage cabinet, which includes a cabinet body and at least two battery clusters, a power converter, and a cluster control box within the cabinet body. The at least two battery clusters are arranged side by side, and each of the at least two battery clusters includes multiple stacked battery packs. The cluster control box and the power converter are stacked on the at least two battery clusters from bottom to top. The cluster control box is electrically connected between the at least two battery clusters and the power converter. The housing of the cluster control box is provided with at least two pairs of first power input interfaces and at least two pairs of first power output interfaces. Each pair of first power input interfaces is electrically connected to one battery cluster, and each pair of first power input interfaces is used to receive the voltage output by one battery cluster. Each pair of first power output interfaces is electrically connected to the power converter, and the power converter is used to receive the voltage output by each pair of first power output interfaces.

[0005] In this embodiment, since the cluster control box is equipped with at least two pairs of first power input interfaces and first power output interfaces, it can connect to at least two rows of battery clusters. This allows one cluster control box to control at least two rows of battery clusters, saving not only at least one cluster control box and reducing costs, but also simplifying system design, reducing wiring and connection complexity, and lowering the overall system complexity and the number of potential failure points. Furthermore, since one cluster control box can control at least two rows of battery clusters, it facilitates centralized control and management of these clusters, improving the convenience and accuracy of synchronous scheduling and facilitating unified scheduling and monitoring.

[0006] In some embodiments, the cluster control box includes a switching assembly disposed within a housing, the switching assembly being electrically connected between a first power input interface and a first power output interface. The switching assembly is used to control the charging and discharging of the battery cluster and to ensure the safe charging and discharging performance of the battery cluster.

[0007] In some embodiments, at least two pairs of first power input interfaces and at least two pairs of first power output interfaces are arranged side-by-side along the length of the energy storage cabinet. In the height direction of the energy storage cabinet, each pair of first power output interfaces is located above each pair of first power input interfaces. Since the power converter, cluster control box, and battery clusters are stacked from top to bottom, placing each pair of first power output interfaces above each pair of first power input interfaces facilitates electrical connection between the first power input interfaces and the battery clusters below the cluster control box, as well as connection between the first power output interfaces and the power converter. Each pair of first power input interfaces includes a first positive input interface and a first negative input interface arranged side-by-side along the length direction, and each pair of first power output interfaces includes a first positive output interface and a first negative output interface arranged side-by-side along the length direction. Because the first positive input interface and the first negative input interface are arranged side-by-side along the length direction, and the first positive output interface and the first negative output interface are arranged side-by-side along the length direction, the arrangement of the multiple interfaces of the cluster control box is reasonable and facilitates assembly and connection.

[0008] In some embodiments, each first positive input interface is electrically connected to the positive interface of a battery cluster via a first copper busbar, and each first negative input interface is electrically connected to the negative interface of a battery cluster via another first copper busbar. The first copper busbars and the other first copper busbar are arranged side-by-side along the length direction. Since the first copper busbar is made of copper, it has excellent conductivity, reducing current loss when current flows through it. Furthermore, because the first copper busbars and the other first copper busbar are arranged side-by-side along the length direction, the space in the length direction can be efficiently utilized to accommodate multiple first copper busbars.

[0009] In some embodiments, the power converter housing is provided with a second power output interface and at least two pairs of second power input interfaces. The second power output interface is used to electrically connect to the external power interface of the energy storage cabinet. Each pair of second power input interfaces is electrically connected to a pair of first power output interfaces. Each pair of second power input interfaces includes a second positive input interface and a second negative input interface arranged side by side along the length direction. Each second positive input interface is electrically connected to a first positive output interface through a second copper busbar, and each second negative input interface is electrically connected to a first negative output interface through another second copper busbar. One second copper busbar and another second copper busbar are arranged side by side along the length direction. In this embodiment, by electrically connecting the power converter and the cluster control box through multiple second copper busbars, the resistive loss of the second copper busbars to the current flowing through them can be effectively reduced, and the power transmission efficiency can be improved. Similarly, since one second copper busbar and another second copper busbar are arranged side by side along the length direction, the space in the length direction can be rationally utilized to accommodate multiple second copper busbars.

[0010] In some embodiments, the second power output interface includes a second positive output interface and a second negative output interface, and the external power interface includes an external positive power interface and an external negative power interface. The second positive output interface is used to electrically connect to the external positive power interface, and the second negative output interface is used to electrically connect to the external negative power interface. The second positive input interface is electrically connected to the second positive output interface through a second copper busbar. That is, the second copper busbar connected to the second positive input interface is also electrically connected to the second positive output interface. This allows a portion of the current output by the battery cluster to flow into the power converter from the second positive input interface, while the other portion of the current output by the battery cluster can be directly transmitted to the external positive power interface through the second copper busbar, and then electrically connected to the external power device. This effectively reduces the current through the second positive input interface, thereby greatly reducing the safety risk of the second positive input interface. Moreover, the second positive input interface is also convenient for miniaturization design.

[0011] Alternatively, the second negative input interface can be electrically connected to the second negative output interface via another second copper busbar. That is, the second copper busbar connected to the second negative input interface is also electrically connected to the second negative output interface. Similarly, only a portion of the current flowing from the battery cluster is delivered to the power converter through this second negative input interface, thereby effectively reducing the current flowing through it. This significantly reduces the safety risks associated with the second negative input interface and also facilitates miniaturization design.

[0012] In some embodiments, the second copper busbar is positioned above the first copper busbar in the height direction, and the cluster control box is located between the battery cluster and the power converter, thereby facilitating the connection between the cluster control box and the battery cluster and the power converter.

[0013] In some embodiments, the energy storage cabinet further includes an insulating support, which comprises two fixed plates spaced apart along the length of the energy storage cabinet and three connecting rods located between the two fixed plates. The two fixed plates are plate-like structures extending in the same direction as the height of the energy storage cabinet, and the three connecting rods are rod-like structures extending in the same direction as the length of the energy storage cabinet. The two fixed plates are used to fix the cabinet body, and the three connecting rods are spaced apart along the height of the energy storage cabinet. One first copper busbar and another first copper busbar are fixed to the lowest connecting rod among the three connecting rods. The first copper busbar connected to the first positive input interface and the first copper busbar connected to the first negative input interface are both fixed to the lowest connecting rod among the three connecting rods, thereby facilitating connection with the battery cluster located below the cluster control box. A second copper busbar is fixed to the middle connecting rod and the uppermost connecting rod among the three connecting rods. Since the second copper busbar is longer than the first copper busbar, fixing the second copper busbar to the upper two connecting rods among the three connecting rods can effectively improve the stability of the fixation of the second copper busbar, thereby facilitating the insertion of the interface with the cluster control box and the interface with the power converter.

[0014] In some embodiments, the rear wall of the cluster control box housing faces the rear wall of the cabinet, the front panel of the cluster control box faces the front wall of the cabinet, the power interface of the cluster control box is located on the rear wall of the cluster control box housing, and the energy storage cabinet also includes a copper busbar, which is electrically connected to the battery cluster or power converter. The copper busbar is fixed to the cabinet and located on the inner side of the rear wall of the cabinet, facing the front wall of the cabinet. The copper busbar is plugged into the power interface and electrically connected to the power interface.

[0015] In this embodiment, the power interface of the cluster control box is located on the rear wall of the cluster control box housing. This reduces the number of interfaces on the front panel of the cluster control box housing. With the area of ​​the front panel of the cluster control box housing remaining unchanged, reducing the number of interfaces on the front panel effectively increases the distance between the interfaces, preventing mutual interference and thus improving the safety performance of the cluster control box. Furthermore, since the power interface of the cluster control box is located on the rear wall of the housing, it is not necessary to concentrate all interfaces on the front panel of the cluster control box housing. This effectively reduces the layout difficulty of various functional components within the cluster control box and facilitates a more rational layout of these components. Because the copper busbar that mates with the power interface of the cluster control box is fixed to the cabinet and located on the rear wall of the cabinet, with its extension direction facing the front wall of the cabinet, and the power interface of the cluster control box located on the rear wall of the cluster control box housing, assembling the cluster control box into the cabinet is as simple as inserting the cluster control box into the cabinet along the depth direction of the energy storage cabinet, aligning the copper busbar with the power interface of the cluster control box. Simultaneously pushing the cluster control box into the cabinet allows for easy connection between the power interface and the copper busbar. When removing the cluster control box from the cabinet, the copper busbar can be easily removed from the power interface, disconnecting the connection. Furthermore, the interface located on the front panel of the cluster control box can be easily connected even with the cabinet door open. This solves a major industry problem where ease of assembly of the cluster control box contradicts safety and a rational layout.

[0016] In some embodiments, the front panel of the cluster control box housing is provided with a low-voltage interface. The low-voltage structure includes a gateway interface or a communication interface. The gateway interface is used to connect to an external network or system and perform protocol conversion and data forwarding. The communication interface is used to connect to external devices and perform signal transmission and protocol conversion. In this embodiment, because the low-voltage interface is located on the front panel of the cluster control box, while the power interface is located on the rear wall of the cluster control box housing, the distance between the power interface and the low-voltage interface of the cluster control box can be effectively increased. This avoids mutual interference between the high-voltage power interface and the low-voltage interface, thereby effectively improving the safety performance of the cluster control box.

[0017] In some embodiments, the rear wall of the cabinet is provided with an air inlet and an air outlet communicating with the internal cavity of the cabinet; the energy storage cabinet also includes a water tank, which is located on the outer side of the rear wall of the cabinet. The water tank includes a water cavity for containing liquid and an inlet and an outlet communicating with the water cavity. The outlet communicates with the air inlet on the rear wall of the cabinet, and the edge of the outlet is sealed to the rear wall. In this embodiment, since the water inlet of the water tank is directly and sealed to the air inlet of the cabinet, no modification to the cabinet is required when installing the water tank, improving the convenience of connecting the water tank. This also makes the water tank optional in this embodiment, increasing the diversity of choices for users.

[0018] In some embodiments, the cabinet includes a bottom wall and a top wall opposite each other in the height direction of the energy storage cabinet, a front wall and a rear wall opposite each other in the depth direction of the energy storage cabinet, and a left wall and a right wall opposite each other in the length direction of the energy storage cabinet. The energy storage cabinet also includes a front baffle, which is fixed to the end of the left wall, bottom wall, and right wall facing the front wall and is sealed to the left wall, bottom wall, and right wall. In this embodiment, the front baffle, left wall, right wall, and bottom wall form a receiving cavity. Since the front baffle is sealed to the left wall, bottom wall, and right wall, the receiving cavity will not leak water from all sides. Thus, water or other fire-fighting liquids delivered into the receiving cavity by fire-fighting equipment can quickly fill the receiving cavity, thereby enabling rapid and effective fire-fighting of abnormal components within the receiving cavity. For example, rapid fire-fighting operations can be carried out on the battery clusters located within the receiving cavity to prevent further deterioration of thermal runaway of the battery clusters or to delay the rate of thermal runaway of the battery clusters, thereby effectively improving the fire-fighting effect.

[0019] In some embodiments, the cluster control box and the power converter are located above the cluster control box in the height direction of the energy storage cabinet, and the air inlet is located below the air outlet in the height direction of the energy storage cabinet. The water tank also includes an opening communicating with the water cavity, which is located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet. The upper edge of the front baffle is also located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet. In this embodiment, since the upper edge of the front baffle is located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet, the height of the receiving cavity is higher than that of the battery cluster in the height direction of the energy storage cabinet. Therefore, when the receiving cavity is filled with fire-fighting fluid (such as water), it can completely cover the battery cluster. While the fire-fighting fluid quickly fills the receiving cavity, it can also ensure that the battery cluster is completely covered, thereby improving the fire-fighting efficiency of the battery cluster. Furthermore, since the upper edge of the front baffle is located below the cluster control box, the fire-fighting fluid in the containment chamber, once full, will flow out of the containment chamber and exit through air vents on the front or rear walls of the cabinet, minimizing contact with the cluster control box and power converter. This effectively reduces the risk of electrical arcing or damage to the cluster control box and power converter when exposed to water or other fire-fighting fluids, allowing for continued use and cost savings. Additionally, because the water tank has an opening positioned between the battery cluster and the cluster control box, when the liquid level in the tank reaches the opening, the liquid will not enter the containment chamber through the air inlet. The opening's position between the battery cluster and the cluster control box along the height of the energy storage cabinet ensures that the water level in the containment chamber will not exceed the opening, thus preventing the cluster control box and power converter inside the cabinet from being soaked in liquid and reducing the risk of electrical arcing and damage.

[0020] In some embodiments, the energy storage cabinet further includes a frame, which is disposed on the rear wall of the cabinet and forms a cavity with the rear wall of the cabinet. A water tank is disposed within the cavity, with its opening and vent communicating with the cavity. The frame has a vent communicating with the cavity, and the edge of the vent facing the bottom wall of the cabinet is located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet. In this embodiment, by covering the rear wall of the cabinet with the frame, the water tank is effectively protected. Furthermore, since the opening and vent communicate with the cavity, and the lowest point of the vent is located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet, the energy storage cabinet further protects the water tank.

[0021] Secondly, embodiments of this application provide a cluster control box for use in an energy storage cabinet. The energy storage cabinet includes a cabinet body and a cluster control box and a battery cluster located inside the cabinet body. The cluster control box is used to manage the charging and discharging of the battery cluster. The cluster control box includes a housing and multiple power interfaces and multiple low-voltage interfaces. The low-voltage interfaces include a gateway interface or a communication interface. The multiple power interfaces are located on the rear wall of the housing, and the multiple low-voltage interfaces are located on the front panel of the housing. The multiple power interfaces are used to connect to the battery cluster or a power converter.

[0022] Based on one embodiment of the second aspect above, in the height direction of the energy storage cabinet, the cluster control box is located above the battery cluster, and the multiple power input interfaces include two pairs of positive input interfaces and negative input interfaces, each pair of positive input interfaces and negative input interfaces being used for electrical connection with a battery cluster.

[0023] Thirdly, embodiments of this application provide a data center, which includes a server rack and an energy storage cabinet as described in any of the embodiments of the first aspect above, the energy storage cabinet being used to supply power to the server rack. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0025] Figure 1 This is a schematic diagram of the structure of an energy storage cabinet provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure behind the left wall of the hidden cabinet of the energy storage cabinet in the embodiment;

[0027] Figure 3 This is a schematic diagram of the structure of a cluster control box provided in an embodiment of this application;

[0028] Figure 4 for Figure 3 A schematic diagram of the cluster control box after the top wall is hidden in the embodiment;

[0029] Figure 5 for Figure 1 A partial structural diagram of the energy storage cabinet in the embodiment;

[0030] Figure 6 for Figure 1 A schematic diagram of the structure in the embodiment where multiple copper busbars are integrated on the same insulating support;

[0031] Figure 7 for Figure 1 A schematic diagram of the connection structure of each copper busbar, switch, etc. in the energy storage cabinet in the embodiment;

[0032] Figure 8 for Figure 2 A partial structural diagram of the internal structure of the energy storage cabinet in the embodiment;

[0033] Figure 9 for Figure 1 An exploded view of the energy storage cabinet in the embodiment.

[0034] Explanation of reference numerals in the attached figures:

[0035] Z: Height of the energy storage unit; X: Length of the energy storage unit; Y: Depth of the energy storage unit;

[0036] 1. Energy storage cabinet;

[0037] 10. Cabinet body; 101. Cabinet interior cavity; 102. Battery compartment; 103. Electrical compartment; 104. Air inlet; 105. Air outlet; 11. Top wall; 12. Bottom wall; 13. Left wall; 14. Right wall; 15. Front wall; 16. Rear wall;

[0038] 20. Battery cluster; 21. Battery pack;

[0039] 30. Cluster control box; 31. Housing of cluster control box; 311. Front panel of housing; 312. Rear wall of housing; 32. Power interface; 321. Outer shell; 322. Connection terminal; 3221. Spring arm; 3222. Hoop; 3223. Gap; 323. First power input interface; 3231. First positive input interface; 3232. First negative input interface; 324. First power output interface; 3241. First positive output interface; 3242. First negative output interface; 33. Low voltage interface; 34. Switch assembly;

[0040] 41. Copper busbar; 412. First copper busbar; 413. Second copper busbar; 415. Connecting copper busbar; 42. Insulating bracket; 421. Fixing plate; 422. Connecting rod; 4221. First connecting rod; 4222. Second connecting rod; 4223. Third connecting rod;

[0041] 50. Power converter; 51. Second power input interface; 511. Second positive input interface; 512. Second negative input interface; 52. Second power output interface; 521. Second positive output interface; 522. Second negative output interface; 523. Second ground output interface; 53. Housing of the power converter; 531. Rear wall of the housing of the power converter; 532. Front wall of the housing of the power converter;

[0042] 60. Guide rail;

[0043] 71. Switch; 72. Magnetic ring; 73. External power interface;

[0044] 81. Water tank; 811. Water inlet; 812. Water outlet; 813. Opening; 82. Front baffle; 821. Upper edge of the front baffle; 83. Frame; 831. Vent.

[0045] 90. Directional flue. Detailed Implementation

[0046] The following section will first explain some of the terms used in the embodiments of this application.

[0047] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] In this specification, the terms "vertical" and "parallel" are explained.

[0049] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0050] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the parallelism is not absolute due to factors such as assembly tolerances, design tolerances, and structural flatness. These situations may lead to the sliding mating part and the first door panel not being absolutely parallel, but this application also defines such situations as parallelism.

[0051] With rapid socio-economic growth, the data center industry is booming globally, and its development and construction are poised for a period of rapid expansion. Data centers are a strategic resource as important as human and natural resources. In the information age, only by utilizing data on a large scale and with flexibility can we better understand and leverage it.

[0052] Data centers typically consist of multiple modules, including server racks, power supply and distribution systems, cooling systems, intelligent monitoring systems, and fire protection systems. The power supply and distribution system includes energy storage cabinets, which are used to supply power to the server racks and other modules.

[0053] Figure 1 This is a schematic diagram of the structure of an energy storage cabinet 1 provided in an embodiment of this application; Figure 2 for Figure 1 A partial structural diagram of the left wall 13 of the hidden cabinet 10 of the energy storage cabinet 1 in the embodiment. Figure 1 The energy storage cabinet in this embodiment can be applied to the power supply and distribution system in a data center.

[0054] Reference Figure 1 and Figure 2 The energy storage cabinet 1 includes a cabinet 10 and a battery cluster 20, a power converter 50, and a cluster control box 30 located within the cabinet 10. The power converter 50 is used to regulate the voltage of the battery cluster 20. The battery cluster 20 includes multiple battery packs 21 arranged in a row.

[0055] The cabinet 10 includes a top wall 11 and a bottom wall 12 that are opposite each other along the height direction Z of the energy storage cabinet 1, a left wall 13 and a right wall 14 that are opposite each other along the length direction X of the energy storage cabinet 1, and a front wall 15 and a rear wall 16 that are opposite each other along the depth direction Y of the energy storage cabinet 1. The front wall 15, the rear wall 16, the left wall 13 and the right wall 14 are located between the top wall 11 and the bottom wall 12. The top wall 11, the bottom wall 12, the front wall 15, the rear wall 16, the left wall 13 and the right wall 14 together form the inner cavity 101 of the cabinet. The battery cluster 20, the power converter 50 and the cluster control box 30 are located inside the inner cavity 101 of the cabinet.

[0056] Understandably, the front wall 15 is usually set as a cabinet door, or a portion of the front wall 15 is set as a cabinet door, to facilitate assembly and maintenance.

[0057] The cluster control box 30 is electrically connected between the battery cluster 20 and the power converter 50, for example, by means of a wire. The cluster control box 30 is used to control the charging and discharging of the battery cluster 20 and to ensure the safe charging and discharging performance of the battery cluster 20.

[0058] Reference Figure 1 and Figure 2 In some embodiments, the battery cluster 20, cluster control box 30, and power converter 50 are stacked from bottom to top. Since the cluster control box 30 and power converter 50 are located above the battery cluster 20, the battery cluster 20 can be placed in a separate compartment, such as battery compartment 102 (e.g., Figure 8 The power converter 50 and cluster control box 30 are placed in a compartment, such as electrical compartment 103 (e.g., Figure 8 This facilitates targeted heat dissipation and fire protection for the battery cluster 20, power converter 50, and cluster control box 30. Furthermore, since the cluster control box 30 is located between the battery cluster 20 and the power converter 50, and is also electrically connected between them, wiring and connection convenience are improved.

[0059] In related technologies, each battery pack has a corresponding cluster control box, which makes the wiring and connection of the entire system complex. It also makes it difficult to achieve convenient and accurate unified scheduling between multiple battery packs, which is not conducive to the energy storage cabinet performing its best energy storage or discharge performance.

[0060] In this embodiment, the energy storage cabinet uses a cluster control box to uniformly schedule and monitor multiple battery clusters, thereby reducing the number of cluster control boxes, which in turn reduces the wiring and connection complexity of the entire system and improves the accuracy of synchronous scheduling of multiple battery clusters.

[0061] Figure 3 This is a schematic diagram of the structure of a cluster control box 30 provided in an embodiment of this application; Figure 3 The cluster control box 30 in the middle can be applied to Figure 1 and Figure 2 Energy storage cabinet 1 in the middle.

[0062] Reference Figure 3 The cluster control box 30 includes a housing 31, and a front panel 311 of the housing 31 (e.g., Figure 1 The front panel 311 and the rear wall 312 of the housing 31 are positioned opposite each other in the depth direction Y of the energy storage cabinet 1. That is, after the cluster control box 30 is installed in the inner cavity 101 of the cabinet, the opposite direction of the front panel 311 and the rear wall 312 of the housing 31 is the depth direction Y of the energy storage cabinet 1. The rear wall 312 of the housing 31 is close to the rear wall 16 of the cabinet 10, and the front panel 311 of the housing 31 is close to the front wall 15 of the cabinet 10.

[0063] Reference Figure 3 In some embodiments, the housing of the cluster control box 30 is provided with at least two pairs of power interfaces 32, which are used to electrically connect the cluster control box 30 to the power converter 50 and the battery cluster 20 (see reference). Figure 2 )between.

[0064] Specifically, at least two pairs of power interfaces 32 include at least two pairs of first power input interfaces 323 and at least two pairs of first power output interfaces 324. Each pair of first power input interfaces 323 is electrically connected to a battery cluster 20 to receive current or voltage output from the connected battery cluster 20. Each pair of first power output interfaces 324 is connected to a power converter 50 (see reference 50). Figure 2 The power converter 50 is electrically connected to output voltage or current. Since the cluster control box 30 has at least two pairs of first power input interfaces 323 and first power output interfaces 324, the cluster control box 30 in this embodiment can connect to at least two rows of battery clusters 20. This allows one cluster control box 30 to control at least two rows of battery clusters 20, saving at least one cluster control box 30, reducing costs, simplifying system design, reducing wiring and connection complexity, and lowering the overall system complexity and number of potential failure points. Furthermore, since one cluster control box 30 can control at least two rows of battery clusters 20, it facilitates centralized control and management of at least two rows of battery clusters 20, improving the convenience and accuracy of synchronous scheduling of at least two rows of battery clusters 20, and facilitating unified scheduling and monitoring.

[0065] Reference Figure 3 In some embodiments, each pair of first power input interfaces 323 includes a first positive input interface 3231 and a first negative input interface 3232, and each pair of first power output interfaces 324 includes a first positive output interface 3241 and a first negative output interface 3242. Each pair of first positive input interfaces 3231 and first negative input interfaces 3232 is used for electrical connection to a battery cluster 20, for example, to the positive output terminal and the negative output terminal of the battery cluster 20, respectively. Since the cluster control box 30 has at least two pairs of first positive input interfaces 3231 and first negative input interfaces 3232, at least two battery clusters 20 can be connected to achieve the purpose of one cluster control box 30 controlling multiple battery clusters 20.

[0066] For ease of use with battery cluster 20 (see reference) Figure 2 ) and power converter 50 (refer to Figure 2 For the connection of ), refer to Figure 3 In some embodiments, in the height direction of the cluster control box 30, i.e., the energy storage cabinet 1 (refer to...) Figure 2In the height direction, the two pairs of first power input interfaces 323 are located below the two pairs of first power output interfaces 324, thereby reducing the distance between the at least two pairs of first power input interfaces 323 and the battery cluster 20 located above the cluster control box 30, facilitating the electrical connection between the two pairs of first power input interfaces 323 and the cluster control box 30. Similarly, since the at least two pairs of first power output interfaces 324 are located below the power converter 50, the distance between the at least two pairs of first power output interfaces 324 and the power converter 50 can be reduced, thereby facilitating the electrical connection between the at least two pairs of first power output interfaces 324 and the power converter 50.

[0067] Understandably, the greater the functional requirements of the cluster control box 30, the more interfaces it needs to have. The interfaces on the cluster control box 30 include a high-current power interface 32 and a low-current low-current interface 33. For example, these are used to connect to the battery cluster 20 (see reference...). Figure 2 ) or power converter 50 (refer to Figure 2 The power interface 32 connected is for high current applications, while various gateway interfaces and communication interfaces are low-voltage interfaces 33. The gateway interface is used to connect to external networks or systems and to perform protocol conversion and data forwarding, while the communication interface is used to connect to external devices and to perform signal transmission and protocol conversion.

[0068] In some related technologies, to facilitate the connection of the cluster control box interfaces during assembly, both the power interface and the low-voltage interface are located on the front panel of the cluster control box housing. This is because when the cluster control box is assembled into the cabinet, the front panel of the housing faces the front wall of the cabinet, i.e., towards the cabinet door, thus facilitating the connection of the cluster control box interfaces with external components (such as power converters). However, because all the interfaces of the cluster control box are concentrated on the front panel of the housing, the layout of various functional components inside the cluster control box is affected by the location of the interfaces on the front panel, resulting in an unreasonable layout of various functional components inside the cluster control box. Moreover, because all the interfaces are concentrated on the front panel, the distance between the interfaces is too small, causing them to interfere with each other. For example, since the power interface is a high-current interface, placing both the power interface and the low-voltage interface on the front panel results in the power interface and the low-voltage interface being too close together, easily interfering with each other and affecting the safety and performance of the cluster control box.

[0069] To improve the security and usability of the cluster control box 30, combined with Figure 1 and Figure 3In some embodiments, the power interface 32 of the cluster control box 30 is located on the rear wall 312 of the housing 31 of the cluster control box 30, that is, on the side wall of the housing 31 of the cluster control box 30 near the rear wall 16 of the cabinet 10. Specifically, at least two pairs of first positive input interfaces 3231 and first negative input interfaces 3232 and at least two pairs of first positive output interfaces 3241 and first negative output interfaces 3242 are all located on the rear wall 312 of the housing 31 of the cluster control box 30. The front panel 311 of the housing 31 of the cluster control box 30 is provided with The low-voltage interface 33 allows for an effective increase in the distance between interfaces on the front panel 311 of the housing 31 of the cluster control box 30, thereby improving the safety performance of the cluster control box 30. Furthermore, since the power interface 32 of the cluster control box 30 is located on the rear wall 312 of the housing 31 of the cluster control box 30, it is not necessary to concentrate all interfaces on the front panel 311 of the housing 31 of the cluster control box 30. This effectively reduces the difficulty of arranging various functional components within the cluster control box 30 and facilitates the rational layout of various functional components within the cluster control box 30.

[0070] Reference Figure 3 In some embodiments, at least two pairs of first positive input interfaces 3231 and first negative input interfaces 3232 are arranged at intervals along the length X of the energy storage cabinet 1, and at least two pairs of first positive output interfaces 3241 and first negative output interfaces 3242 are arranged at intervals along the length X of the energy storage cabinet 1. Since the rear wall 312 of the housing 31 of the cluster control box 30 is mainly used to arrange at least two pairs of first positive input interfaces 3231 and first negative input interfaces 3232 and at least two pairs of first positive output interfaces 3241 and first negative output interfaces 3242, the spacing between the power interfaces 32 can be effectively increased, effectively avoiding the phenomenon of arcing or electrical sparking between the power interfaces 32.

[0071] Figure 4 for Figure 3 A schematic diagram of the cluster control box 30 after the top wall 11 is hidden in the embodiment. Figure 4 For explanation Figure 3 The relationship between each power interface 32 and the switching assembly 34.

[0072] Reference Figure 4 In some embodiments, the cluster control box 30 includes a switch assembly 34, which includes a fuse, contactor, shunt, leakage current protector or disconnector, etc., disposed in the cluster control box 30. The switch assembly 34 is used to control the charging and discharging of the battery cluster 20 and to ensure the safety performance of the charging and discharging of the battery cluster 20.

[0073] Reference Figure 4 In some embodiments, the switching assembly 34 includes at least two sets, each pair of power interfaces 32 including a first power input interface 323 and a first power output interface 324, and the two sets of switching assemblies 34 are electrically connected between the first power input interface 323 and the first power output interface 324. The safety of at least two battery clusters 20 can be ensured by at least two sets of switching assemblies 34. Since the at least two sets of switching assemblies 34 are located in the same cluster control box 30, and the at least two sets of switching assemblies 34 use the same controller of the cluster control box 30, the accuracy of the synchronous scheduling of the two sets of switching assemblies 34 can be improved.

[0074] Combination Figure 1 and Figure 4 In some embodiments, since the power interface 32 of the cluster control box 30 is located on the rear wall 312 of the housing 31 of the cluster control box 30, the fuses, contactors, shunts, leakage current protectors or disconnect switches connected to the power interface 32 of the cluster control box 30 can be concentrated on one side of the rear wall 312 of the housing 31 of the cluster control box 30, while the battery cluster 20 control unit or other low-current functional devices are located on the front panel 311 of the housing 31 of the cluster control box 30. This effectively separates the high-current functional devices and the low-current functional devices within the housing 31 of the cluster control box 30, avoiding mutual interference, and thus facilitating the rational layout of various functional components within the cluster control box 30.

[0075] It is understood that this application does not limit the number of power interfaces 32 provided on the rear wall 312 of the housing 31 of the cluster control box 30. For example, all power interfaces 32 of the cluster control box 30 can be provided on the rear wall 312 of the housing 31 of the cluster control box 30, while low-voltage interfaces 33 can be provided on the front panel 311 of the housing 31 of the cluster control box 30. In some other embodiments, the power interfaces 32 for input of the cluster control box 30 can be provided on the front panel 311 of the housing 31 of the cluster control box 30, while the power interfaces 32 for output of the cluster control box 30 can be provided on the rear wall 312 of the housing 31 of the cluster control box 30, to adapt to certain specific scenarios. Of course, in some embodiments, some communication interfaces of the cluster control box 30 can also be provided on the rear wall 312 of the housing 31 of the cluster control box 30.

[0076] Figure 5 for Figure 1 A partial structural diagram of the energy storage cabinet 1 in the embodiment is shown. Figure 5 An exploded view of the cluster control box 30, the power interface 32 of the power converter 50, and the copper busbar 41 is shown. Figure 5 The connection between the interfaces on the cluster control box 30 and the power converter 50 and the copper busbar 41 is shown.

[0077] The power converter 50 in this embodiment may include a DC / DC (direct current / direct current) converter, which boosts or bucks the voltage output from the battery cluster 20 to ensure the stability of the output voltage of the energy storage cabinet 1. It is understood that the power converter 50 in this embodiment may also include a PCS (power conversion system) converter, which converts the DC power from the battery cluster 20 into AC power to supply power to external power devices.

[0078] In some embodiments, the power converter 50 includes a housing and a second power output interface 52 disposed on the housing, and at least two pairs of second power input interfaces 51. The at least two pairs of second power input interfaces 51 are used to connect to at least two pairs of first power output interfaces 324 of the cluster control box 30 to achieve electrical connection between the cluster control box 30 and the power converter 50. The second power output interface 52 is used to electrically connect to the external power interface 73 of the energy storage cabinet 1 to achieve electrical connection with external power devices.

[0079] Specifically, each pair of second power input interfaces 51 is used for electrical connection with a pair of first power output interfaces 324. Each pair of first power output interfaces 324 corresponds to a pair of second power input interfaces 51.

[0080] Each pair of second power input interfaces 51 includes a second positive input interface 511 and a second negative input interface 512. Each pair of second positive input interfaces 511 and second negative input interfaces 512 is used for electrical connection with a pair of first positive output interfaces 3241 and first negative input interfaces 3232. Since the power converter 50 includes at least two pairs of second positive input interfaces 511 and second negative input interfaces 512, at least two rows of battery clusters 20 can be connected, thereby enabling at least two rows of battery clusters 20 (see reference) to be implemented through the power converter 50. Figure 2 The parallel connection of the two battery clusters 20, that is, the battery pack 21 of the two battery clusters 20 (refer to...) Figure 2 After being boosted in series, the power is then output through parallel connection of power converter 50. This avoids the need to set up a boost module on each battery pack 21, thus effectively saving costs. It also ensures that if one battery pack 20 fails, the other battery packs 20 can continue to work without affecting normal operation.

[0081] To facilitate the connection between the power converter 50 and the cluster control box 30, at least two pairs of second positive input interfaces 511 and second negative input interfaces 512 of the power converter 50 are also located on the rear wall 531 of its housing 53.

[0082] It is understood that the rear wall 531 and the front wall 532 of the housing 53 of the power converter 50 are two side walls opposite each other in the Y direction. The rear wall 531 of the housing 53 of the power converter 50 refers to the side wall close to the rear wall 16 of the cabinet 10, while the front wall 532 of the housing 53 of the power converter 50 is close to the front wall 15 of the cabinet 10.

[0083] The following describes in detail the connection method between the cluster control box 30, the battery cluster 20, the power converter 50, and the copper busbar 41.

[0084] Under the premise that the functional components within the cluster control box 30 can be rationally arranged, the distance between the power interface 32 and the low-voltage interface 33 of the cluster control box 30 can be effectively increased, and the safety performance of the cluster control box 30 can be effectively improved, in order to reduce the assembly difficulty of the power interface 32 and the copper busbar 41 of the cluster control box 30, refer to Figure 5 Energy storage cabinet 1 (refer to) Figure 2 The copper busbar 41 in the cluster control box 30 includes a plurality of first copper busbars 41 for electrical connection with at least two pairs of first power input interfaces 323.

[0085] Each first positive input interface 3231 is electrically connected to the positive interface of a battery cluster 20 through a first copper busbar 412, and each first negative input interface 3232 is electrically connected to the negative interface of a battery cluster 20 through a first copper busbar 412. Multiple first copper busbars 412 are arranged side-by-side along the X-direction, meaning that at least two pairs of first positive input interfaces 3231 and first negative input interfaces 3232 are connected to the first copper busbars 412 arranged side-by-side along the X-direction. In this embodiment, at least two pairs of first positive input interfaces 3231 and first negative input interfaces 3232 are electrically connected to the battery cluster 20 through multiple first copper busbars 412. Since the first copper busbars 412 are made of copper, they have excellent conductivity, which can reduce current loss when current flows through the first copper busbars 412.

[0086] Reference Figure 5 In some embodiments, the first copper busbar 412 is a hard copper busbar, and the first copper busbar 412 is plugged into and electrically connected to the first power input interface 323.

[0087] Specifically, the first copper busbar 412 is located on the rear wall 16 of the cabinet 10 (see reference). Figure 2 The first copper busbar 412 is located on the inner side of the cabinet 10, on the rear wall 16 facing the front wall 15 of the cabinet 10 (see reference). Figure 2The first copper busbar 412 extends towards the front wall 15 of the cabinet 10, meaning its extension direction is consistent with the Y-direction. The cluster control box 30 is also inserted into the Y-direction during assembly. Each first copper busbar 412 is plugged into a first power input interface 323 of the cluster control box 30. In this embodiment, since the first copper busbar 412, which is plugged into the first power input interface 323 of the cluster control box 30, is located on the rear wall 16 of the cabinet 10, and the extension direction of the first copper busbar 412 faces the front wall 15 of the cabinet 10, while the first power input interface 323 of the cluster control box 30 is located on the rear wall 312 of the housing 31 of the cluster control box 30, when assembling the cluster control box 30 into the cabinet 10, it is only necessary to insert the cluster control box 30 into the cabinet 10 along the Y direction, so that the first copper busbar 412 is aligned with the first power input interface 323 of the cluster control box 30. Simultaneously, the plugging of the first power input interface 323 of the cluster control box 30 and the first copper busbar 412 can be easily achieved while pushing the cluster control box 30 into the cabinet 10. When the cluster control box 30 is removed from the cabinet 10, the first copper busbar 412 can be disengaged from the first power input interface 323, thereby disconnecting the first copper busbar 412 from the first power input interface 323. Meanwhile, the front panel 311 of the cluster control box 30 (such as...) Figure 1 The low-voltage interface on the (refer to) Figure 1 The connection can be easily made with the cabinet door of the cabinet 10 open. This allows the cluster control box 30 in this embodiment to be easily assembled and maintained, while also effectively arranging the functional components within the cluster control box 30, increasing the distance between the first power input interface 323 and the low-voltage interface 33, and improving the safety performance of the cluster control box 30. This solves a major problem in the industry where the ease of assembly of the cluster control box 30 contradicts its safety and reasonable layout.

[0088] Reference Figure 5In some embodiments, the copper busbar 41 in the energy storage cabinet 1 further includes multiple second copper busbars 413 for electrically connecting at least two pairs of first power output interfaces 324 and at least two pairs of second power input interfaces 51. Specifically, each second positive input interface 511 is electrically connected to a first positive output interface 3241 through a second copper busbar 413, and each second negative input interface 512 is electrically connected to a first negative output interface 3242 through a second copper busbar 413. The multiple second copper busbars 413 are arranged side by side along the X direction, that is, the second copper busbars 413 connected to at least two pairs of second positive input interfaces 511 and second negative input interfaces 512 are arranged side by side along the length direction. In this embodiment, by electrically connecting the power converter 50 and the cluster control box 30 through multiple second copper busbars 413, the resistive loss of the second copper busbars 413 to the current flowing through them can be effectively reduced, thereby improving the power transmission efficiency.

[0089] In some implementations, the second copper busbar 413 is a rigid copper busbar, and one second copper busbar 413 is plugged into and electrically connected to a first power output interface 324 and a second power input interface 51 respectively.

[0090] Specifically, the second copper busbar 413, like the first copper busbar 412, is located on the rear wall 16 of the cabinet 10 (see reference). Figure 2 Inside the cluster control box 30, the extension direction of the second copper busbar 413 is also consistent with the Y direction. Each second copper busbar 413 is correspondingly plugged into a first power output interface 324 and a second power input interface 51. In this embodiment, when assembling the cluster control box 30 into the cabinet 10, it is only necessary to insert the cluster control box 30 and the power converter 50 into the cabinet 10 along the Y direction, so that the second copper busbar 413 is aligned with the first power output interface 324 and the second power input interface 51. While pushing the cluster control box 30 and the power converter 50 into the cabinet 10, the first power output interface 324 and the second power input interface 51 can be easily plugged into the second copper busbar 413. When the cluster control box 30 and the power converter 50 are removed from the cabinet 10, the second copper busbar 413 can be removed from the first power output interface 324 and the second power input interface 51.

[0091] To facilitate the corresponding connection of multiple second copper busbars 413 with multiple pairs of first power output interfaces 324 and second power input interfaces 51, refer to Figure 5In some embodiments, each pair of second positive input interfaces 511 and second negative input interfaces 512 are arranged side by side along the length direction X of the energy storage cabinet 1. Each pair of second positive input interfaces 511 and second negative input interfaces 512 are arranged opposite each pair of first positive output interfaces 3241 and first negative output interfaces 3242 in the Z direction. It can be understood that the second positive input interface 511 is arranged opposite the first positive output interface 3241, and the second negative input interface 512 is arranged opposite the first negative output interface 3242. This effectively reduces the distance between the second positive input interface 511 and the first positive output interface 3241, as well as the distance between the second negative input interface 512 and the first negative output interface 3242. Consequently, the lengths of the second copper busbar 413 used to connect the second positive input interface 511 and the first positive output interface 3241, and the second copper busbar 413 used to connect the second negative input interface 512 and the first negative output interface 3242, can be effectively reduced. This not only saves space but also effectively reduces the resistance loss of the second copper busbar 413.

[0092] Reference Figure 5 In some embodiments, the power converter 50 has two pairs of second power input interfaces 51, which are arranged left and right in the X direction and up and down in the Z direction.

[0093] Reference Figure 5 In some embodiments, the second power output interface 52 includes a second positive output interface 521, a second negative output interface 522, and a second ground output interface 523. The second positive output interface 521 is used to be electrically connected to the positive external power interface 73, the second negative output interface 522 is used to be electrically connected to the negative external power interface 73, and the second ground output interface 523 is used to be electrically connected to the ground external power interface 73.

[0094] The second positive output interface 521, the second ground output interface 523, and one pair of second power input interfaces 51 are arranged in the X direction, and the second negative output interface 522 and another pair of second power input interfaces 51 are arranged in the X direction. The second positive output interface 521 is located above one of the second positive input interfaces 511 in the Z direction, and the second negative output interface 522 is located below one of the second negative input interfaces 512.

[0095] Reference Figure 5In some embodiments, at least one second positive input interface 511 is connected to a second copper busbar 413 which is electrically connected to a second positive output interface 521 and an external positive power interface 32, respectively. This allows a portion of the current output by the battery cluster 20 to flow into the power converter 50 from the second positive input interface 511, while the other portion of the current output by the battery cluster 20 can be directly transmitted to the external positive power interface 32 through the second copper busbar 413, and then electrically connected to external power devices. This effectively reduces the current through the second positive input interface 511, thereby greatly reducing the safety risk of the second positive input interface 511. Moreover, the second positive input interface 511 is also convenient for miniaturization design.

[0096] At least one second copper busbar 413 connected to the second negative input interface 512 is electrically connected to the second negative output interface 522 and the external negative power interface 32, respectively. Similarly, only a portion of the current flowing out of the battery cluster 20 is delivered to the power converter 50 through the second negative input interface 512, thereby effectively reducing the current through the second negative input interface 512. This greatly reduces the safety risk of the second negative input interface 512 and also facilitates miniaturization design.

[0097] Reference Figure 5 In some implementations, the second positive input interface 511 connected to the second copper busbar 413 electrically connected to the second positive output interface 521 and the external positive power interface 32, and the second negative input interface 512 connected to the second copper busbar 413 electrically connected to the second negative output interface 522 and the external negative power interface 32, are not the same pair, that is, they will not be connected to the same battery cluster 20.

[0098] Reference Figure 5 In some embodiments, the second positive input interface 511 and the second positive output interface 521 connected to the second copper busbar 413 are arranged in the Z direction, and the second negative input interface 512 and the second negative output interface 522 connected to the second copper busbar 413 are also arranged in the Z direction. This can effectively reduce the length of the second copper busbar 413, thereby reducing its proportion of the installation space and also reducing the resistance loss of the second copper busbar 413.

[0099] Reference Figure 5 In some embodiments, the second copper busbar 413 is located above the first copper busbar 412 and spaced apart to facilitate the connection between the cluster control box 30 and the battery cluster 20 (see reference). Figure 2 ) and power converter 50 (refer to Figure 2 ) connection.

[0100] To facilitate the connection between the copper busbar 41 and the power interface 32 of the cluster control box 30, refer to... Figure 1 and Figure 5 In some embodiments, the power interface 32 of the cluster control box 30 is located on the rear wall 312 of the cluster control box 30, and the low-voltage interface 33 (such as...) is located on the rear wall 312 of the cluster control box 30. Figure 1 ) is located on the front panel 311 of the cluster control box 30 (e.g. Figure 1 On the cluster control box 30, the rear wall 312 of the housing 31 has a sufficiently large area to accommodate the larger power interface 32 of the cluster control box 30. The large size of the power interface 32 facilitates the insertion and connection of the copper busbar 41. Furthermore, the greater space for the large power interface 32 allows for the use of a larger cross-sectional area copper busbar 41, effectively reducing the connection resistance between the power interface 32 and the copper busbar 41 and preventing any impact on the overall performance of the cluster control box 30.

[0101] To improve the speed and accuracy of the connection between the copper busbar 41 and the power interface 32 of the cluster control box 30, the copper busbar 41 and the power interface 32 of the cluster control box 30 are directly opposite each other in the Y direction, and a guide rail 60 is provided inside the cabinet 10 (e.g., Figure 2 The extension direction of the guide rail 60 is consistent with the extension direction of the copper busbar 41, that is, the extension direction of the rail is consistent with the Y direction. The guide rail 60 can be used to conveniently control the precise movement of the cluster control box 30, so as to improve the accuracy and speed of the connection between the power interface 32 of the cluster control box 30 and the copper busbar 41.

[0102] Figure 6 for Figure 1 A schematic diagram of the structure in the embodiment where multiple copper busbars 41 are integrated on the same insulating bracket 42.

[0103] Reference Figure 6 In some embodiments, the energy storage cabinet 1 further includes an insulating support 42. Since there are multiple copper busbars 41, such as multiple first copper busbars 412 and multiple second copper busbars 413, the support is positioned to facilitate the fixing of the multiple first copper busbars 412 and multiple second copper busbars 413. (Refer to...) Figure 5 and Figure 6 In some embodiments, multiple first copper busbars 412 and multiple second copper busbars 413 are collectively fixed to the same insulating bracket 42, and then the insulating bracket 42 is fixed to the cabinet 10, thereby effectively reducing the difficulty of fixing multiple first copper busbars 412 and multiple second copper busbars 413 to the cabinet 10.

[0104] Specifically, in some embodiments, the insulating support 42 includes two fixed plates 421 spaced apart along the length X direction of the energy storage cabinet 1, and three connecting rods 422 located between the two fixed plates 421. The two fixed plates 421 are plate-shaped structures extending in the same direction as the height Z direction of the energy storage cabinet 1, and the three connecting rods 422 are rod-shaped structures extending in the same direction as the length X direction of the energy storage cabinet 1. The two fixed plates 421 are used to fix the cabinet 10, and the three connecting rods 422 are spaced apart along the height Z direction of the energy storage cabinet 1. The two fixed plates 421 and the three connecting rods 422 can support each other, thereby effectively improving the stability of the insulating support 42.

[0105] Reference Figure 6 In some embodiments, multiple first copper busbars 412 are fixed at intervals on the lowest of the three connecting rods 422. That is, the first copper busbar 412 connected to the first positive input interface 3231 and the first copper busbar 412 connected to the first negative input interface 3232 are both fixed on the lowest of the three connecting rods 422, thereby facilitating connection with the battery cluster 20 located below the cluster control box 30.

[0106] Reference Figure 6 In some embodiments, multiple second copper busbars 413 are fixed to the upper two of the three connecting rods 422, that is, fixed to the middle connecting rod 422 and the uppermost connecting rod 422. Specifically, the second copper busbars 413 that are connected to the first positive output interface 3241, the second positive input interface 511, and the second positive output interface 521 are fixed to the upper two of the three connecting rods 422, and the second copper busbars 413 that are connected to the first negative output interface 3242, the second negative input interface 512, and the second negative output interface 522 are fixed to the upper two of the three connecting rods 422. Since the second copper busbar 413 is longer than the first copper busbar 412, fixing the second copper busbar 413 in the upper two of the three connecting rods 422 can effectively improve the stability of fixing the second copper busbar 413, so as to facilitate the connection with the interface of the cluster control box 30 and the interface of the power converter 50.

[0107] Figure 7 for Figure 1 A schematic diagram of the connection structure of each copper busbar 41, switch 71, etc. in the energy storage cabinet 1 in the embodiment.

[0108] Reference Figure 7In some embodiments, the energy storage cabinet 1 further includes multiple connecting copper busbars 415, a magnetic ring 72, a switch 71, and multiple external power interfaces 73. The magnetic ring 72 is located above the power converter 50 and is used for shielding and filtering noise. The multiple external power interfaces 73 are located on the cabinet body 10. The second copper busbar 413 is electrically connected to the magnetic ring 72 through the connecting copper busbar 415. The magnetic ring 72 is electrically connected to the switch 71 through the connecting copper busbar 415. The switch 71 is electrically connected to the external power interfaces 73 through the connecting copper busbar 415. The external power interfaces 73 are used for electrical connection with external power devices to receive input current from or output current to external power devices. In this embodiment, the energy storage cabinet 1 can not only provide first-level protection for the battery cluster 20 and external power devices through the switch assembly 34 of the cluster control box 30, but also provide second-level protection for the battery cluster 20 and external power devices through the switch 71, thus effectively improving the safety of the energy storage cabinet 1 in this embodiment.

[0109] Figure 8 for Figure 2 A partial structural diagram of the interior of the cabinet 10 in the energy storage cabinet 1 of the embodiment.

[0110] Reference Figure 2 and Figure 8 In some embodiments, the cabinet 10 includes a battery compartment 102 and an electrical compartment 103 arranged in the Z direction. The electrical compartment 103 is located above the battery compartment 102 and is connected to the battery compartment 103. The battery cluster 20 is disposed in the battery compartment 102, and the cluster control box 30 and the power converter 50 are disposed in the electrical compartment 103.

[0111] Understandably, the number of battery clusters 20 can be multiple or a single one.

[0112] Reference Figure 2 In some embodiments, there are multiple battery clusters 20, each of which includes multiple battery packs 21 stacked along the Z direction. The multiple battery packs 21 of each battery cluster 20 are connected in series, and the multiple battery clusters 20 are arranged in parallel. This allows for a one-cluster-one-boost configuration in this embodiment, eliminating the need for a DC-DC converter for each battery pack 21. This reduces the number of DC-DC converters in the energy storage cabinet 1 in this embodiment, effectively saving costs.

[0113] Reference Figure 5 and Figure 8In some embodiments, the rear wall 16 of the cabinet 10 is provided with an air inlet 104 and an air outlet 105. The air inlet 104 is located at the lower end of the rear wall 16 of the cabinet 10 in the Z direction and communicates with the battery compartment 102. The air outlet 105 is located at the upper end of the rear wall 16 of the cabinet 10 in the Z direction and communicates with the electrical compartment 103. In this embodiment, airflow enters the inner cavity 101 of the cabinet from the air inlet 104 at the lower end of the rear wall 16 of the cabinet 10. Then, the airflow flows from bottom to top in the inner cavity 101 of the cabinet and finally flows out of the inner cavity 101 of the cabinet through the air outlet 105 at the upper end of the rear wall 16 of the cabinet 10. This cycle repeats to achieve heat dissipation for the battery cluster 20, power converter 50, and cluster control box 30 inside the cabinet 10.

[0114] It is understandable that there can be multiple air inlets 104 and multiple air outlets 105. For example, multiple air inlets 104 can be located in a certain area at the lower end of the rear wall 16, and multiple air outlets 105 can be located in a certain area at the upper end of the rear wall 16.

[0115] Figure 9 for Figure 1 An exploded view of the energy storage cabinet 1 in the embodiment.

[0116] In order to improve the fire protection effect of energy storage cabinet 1 in the event of thermal runaway of battery pack 21, refer to Figure 2 , Figure 5 and Figure 9 In some embodiments, the energy storage cabinet 1 further includes a water tank 81 for connection to an external fire hydrant. The water tank 81 is located on the outer side of the rear wall 16 of the cabinet body 10. The water tank 81 includes a water cavity for containing liquid and an inlet 811 and an outlet 812 communicating with the water cavity. The outlet 812 communicates with an air inlet 104 on the rear wall 16 of the cabinet body 10, and the outer edge of the outlet 812 is sealed to the rear wall 16. In this embodiment, since the outlet 812 of the water tank 81 is directly and sealed to the air inlet 104 of the cabinet body 10, no modification to the cabinet body 10 is required when installing the water tank 81, improving the convenience of connecting the water tank 81. This also makes the water tank 81 in this embodiment optional, increasing the diversity of choices for users.

[0117] Specifically, under normal operating conditions, the water tank 81 is empty. External air can enter the water chamber of the water tank 81 through the inlet 811, then enter the inner cavity 101 of the cabinet through the outlet 812 and the air inlet 104, and then flow out through the air outlet 105. This cycle is repeated to dissipate heat from the components inside the inner cavity 101 of the cabinet. When the battery cluster 20 inside the energy storage cabinet 1 experiences thermal runaway, water can be supplied to the water tank 81 through the inlet 811 and enter the inner cavity 101 of the cabinet through the outlet 812 of the water tank 81 and the air inlet 104 of the cabinet 10 to perform fire suppression operations on the thermally runaway battery cluster 20.

[0118] In order to improve the efficiency of water delivery from water tank 81 to the inner cavity 101 of the cabinet, refer to Figure 2 , Figure 5 and Figure 9 In some embodiments, the energy storage cabinet 1 further includes a front baffle 82, which is fixed to the end of the left wall 13, bottom wall 12, and right wall 14 facing the front wall 15 and is sealed to the left wall 13, bottom wall 12, and right wall 14. That is, the front baffle 82 is located inside the front wall 15 and between the battery cluster 20 and the front wall 15. In other words, the front baffle 82, left wall 13, right wall 14, and bottom wall 12 form a receiving cavity. It can be understood that the area where the receiving cavity is located is part of the area where the cabinet's internal cavity 101 is located. The size of the receiving cavity is related to the height of the front baffle 82. The higher the height of the front baffle 82, the larger the volume of the receiving cavity. If the front baffle 82 extends upward to connect with the top wall 11, then the area where the receiving cavity is located is basically equal to the area where the cabinet's internal cavity 101 is located. The containment cavity can be used to contain the battery cluster 20. Since the front baffle 82 is sealed with the left wall 13, the bottom wall 12 and the right wall 14, the containment cavity will not leak water from all sides. Thus, water or other fire-fighting liquids sent into the containment cavity by fire-fighting equipment can quickly fill the containment cavity, thereby enabling effective fire-fighting of abnormal components in the containment cavity. For example, fire-fighting operations can be quickly carried out on the battery cluster 20 located in the containment cavity to prevent the thermal runaway of the battery cluster 20 from further deteriorating or to delay the rate of thermal runaway of the battery cluster 20, thereby effectively improving the fire-fighting effect.

[0119] To improve the fire-fighting efficiency of battery cluster 20, refer to Figure 2 , Figure 5 and Figure 8In some embodiments, in the Z-direction, the cluster control box 30 is located above the battery cluster 20, and the power converter 50 is located above the cluster control box 30. The upper edge 821 of the front baffle 82 is located between the battery cluster 20 and the cluster control box 30 in the Z-direction. In this embodiment, since the upper edge of the front baffle 82 is located between the battery cluster 20 and the cluster control box 30 in the Z-direction, the height of the receiving cavity is higher than that of the battery cluster 20 in the Z-direction. Therefore, when fire-fighting operations are required inside the cabinet cavity 101, when the fire-fighting fluid (such as water) supplied to the receiving cavity through the outlet 812 of the water tank 81 reaches the height of the upper edge of the front baffle 82, the fire-fighting fluid fills the receiving cavity and can completely cover the battery cluster 20. In this embodiment, while the fire-fighting fluid quickly fills the receiving cavity, it can also ensure that the battery cluster 20 is completely covered, thereby improving the fire-fighting efficiency of the battery cluster 20. Furthermore, since the upper edge of the front baffle 82 is located below the cluster control box 30, the fire-fighting liquid in the containment cavity will flow out of the containment cavity after it is filled, and will flow out from some air vents on the front wall 15 or the air outlets on the rear wall 16 of the cabinet 10, so as to avoid contact with the cluster control box 30 and the power converter 50 as much as possible. This can effectively reduce the risk of electrical arcing or damage to the cluster control box 30 and the power converter 50 when they come into contact with water or other fire-fighting liquids, so that they can continue to be used in the future and save costs.

[0120] Reference Figure 2 , Figure 5 and Figure 9 In some embodiments, the water tank 81 further includes an opening 813 communicating with the water cavity, the opening 813 being located in the Z direction between the battery cluster 20 and the cluster control box 30. In this embodiment, since the water tank 81 is provided with an opening 813, and the height of the opening 813 is located between the battery cluster 20 and the cluster control box 30, when the liquid level in the water tank 81 reaches the opening 813, the liquid in the water tank 81 will no longer enter the receiving cavity from the air inlet 104. Since the opening 813 is located in the Z direction between the battery cluster 20 and the cluster control box 30, the water level in the receiving cavity will not be higher than the opening 813, thereby preventing the cluster control box 30 and the power converter 50 inside the cabinet 10 from being wetted by liquid, reducing the risk of electrical arcing and damage.

[0121] Reference Figure 2 , Figure 5 and Figure 9 In some embodiments, the energy storage cabinet 1 further includes a frame 83, which covers the rear wall 16 of the cabinet 10 and forms a receiving cavity with the rear wall 16 of the cabinet 10. A water tank 81 is disposed in the receiving cavity, and an opening 813 communicates with the receiving cavity. An air outlet 105 (such as...) Figure 5 The frame 83 is connected to the accommodating cavity, and the frame 83 is provided with a vent 831 that is connected to the accommodating cavity. The lowest end of the vent 831 is located between the battery cluster 20 and the cluster control box 30 in the Z direction.

[0122] In this embodiment, under normal operating conditions, external gas enters the accommodating cavity through the vent 831, then enters the water tank 81 through the opening 813, and then enters the lower end of the inner cavity 101 of the cabinet through the water outlet 812 of the water tank 81 and the air inlet 104 of the cabinet 10. It then flows upward to the upper end of the inner cavity 101 of the cabinet, and flows into the accommodating cavity through the air outlet 105, and then flows out through the vent 831. This cycle repeats to achieve heat dissipation for the energy storage cabinet 1.

[0123] When thermal runaway occurs in the battery cluster 20, based on the principle of communicating vessels, since the outlet 812 of the water tank 81 is connected to the air inlet 104 of the cabinet 10, external water source enters the water tank 81 from the water inlet 811, and then enters the inner cavity 101 of the cabinet from the outlet 812 and the air inlet 104 of the water tank 81. It can maintain the water level in the water tank 81 and the water level in the inner cavity 101 of the cabinet at the same level. When the liquid level in the inner cavity 101 of the cabinet reaches the height of the opening 813, the water level in the water tank 81 and the inner cavity 101 of the cabinet will no longer rise, but will be discharged from the vent 831 into the containment cavity. Thus, under the premise of ensuring the fire protection effect, the arcing or damage to the cluster control box 30 and the power converter 50 can be reduced or avoided.

[0124] Reference Figure 2 , Figure 8 and Figure 9 In order to further improve the safety of the energy storage cabinet 1, in some embodiments, the energy storage cabinet 1 is also provided with a directional flue 90, and the pressure relief ports of the multiple battery packs 21 of the battery cluster 20 are respectively connected to the directional flue 90. In this way, when a certain battery pack 21 thermally runs away, the impact on other battery packs 21 can be avoided or reduced, thereby effectively improving the safety performance of the energy storage cabinet 1.

[0125] It should be noted that the cluster control box 30 mentioned above can be used not only in the energy storage cabinet 1 in this embodiment, but also in other energy storage devices, such as industrial and commercial energy storage cabinets or container energy storage cabinets.

[0126] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An energy storage cabinet, characterized in that, The energy storage cabinet includes a cabinet and at least two battery clusters, a power converter and a cluster control box inside the cabinet. The at least two battery clusters are arranged side by side, and each of the at least two battery clusters includes multiple stacked battery packs. The cluster control box and the power converter are stacked on the at least two battery clusters from bottom to top. The cluster control box is electrically connected between the at least two battery clusters and the power converter. The housing of the cluster control box is provided with at least two pairs of first power input interfaces and at least two pairs of first power output interfaces. Each pair of first power input interfaces is electrically connected to one of the battery clusters. Each pair of first power input interfaces is used to receive the voltage output by one of the battery clusters. Each pair of first power output interfaces is electrically connected to the power converter. The power converter is used to receive the voltage output by each pair of first power output interfaces.

2. The energy storage cabinet according to claim 1, characterized in that, The cluster control box includes a switching assembly disposed within the housing, the switching assembly being electrically connected between the first power input interface and the first power output interface.

3. The energy storage cabinet according to claim 1 or 2, characterized in that, Along the length of the energy storage cabinet, the at least two pairs of first power input interfaces are arranged side by side, and the at least two pairs of first power output interfaces are arranged side by side. Along the height of the energy storage cabinet, each pair of first power output interfaces is located above each pair of first power input interfaces. Each pair of the first power input interfaces includes a first positive input interface and a first negative input interface arranged side by side along the length direction, and each pair of the first power output interfaces includes a first positive output interface and a first negative output interface arranged side by side along the length direction.

4. The energy storage cabinet according to claim 3, characterized in that, Each of the first positive input interfaces is electrically connected to the positive interface of a battery cluster via a first copper busbar, and each of the first negative input interfaces is electrically connected to the negative interface of a battery cluster via another first copper busbar, wherein the first copper busbar and the other first copper busbar are arranged side by side along the length direction.

5. The energy storage cabinet according to claim 4, characterized in that, The housing of the power converter is provided with a second power output interface and at least two pairs of second power input interfaces. The second power output interface is used to electrically connect to the external power interface of the energy storage cabinet. Each pair of second power input interfaces is electrically connected to a pair of first power output interfaces, and each pair of second power input interfaces includes a second positive input interface and a second negative input interface arranged side by side along the length direction; Each second positive input interface is electrically connected to a first positive output interface via a second copper busbar, and each second negative input interface is electrically connected to the first negative output interface via another second copper busbar, wherein the first second copper busbar and the other second copper busbar are arranged side by side along the length direction.

6. The energy storage cabinet according to claim 5, characterized in that, The second power output interface includes a second positive output interface and a second negative output interface. The external power interface includes an external positive power interface and an external negative power interface. The second positive output interface is used to be electrically connected to the external positive power interface, and the second negative output interface is used to be electrically connected to the external negative power interface. The second positive input interface is electrically connected to the second positive output interface through one of the second copper busbars, or the second negative input interface is electrically connected to the second negative output interface through the other second copper busbar.

7. The energy storage cabinet according to claim 6, characterized in that, In the height direction, the second copper busbar is located above the first copper busbar.

8. The energy storage cabinet according to claim 6 or 7, characterized in that, The energy storage cabinet also includes an insulating support, which comprises two fixed plates spaced apart along the length of the energy storage cabinet and three connecting rods located between the two fixed plates. The two fixed plates are plate-shaped structures extending in the same direction as the height of the energy storage cabinet, and the three connecting rods are rod-shaped structures extending in the same direction as the length of the energy storage cabinet. The two fixed plates are used to fix the cabinet body, and the three connecting rods are spaced apart along the height of the energy storage cabinet. One first copper busbar and the other first copper busbar are fixed to the lowermost connecting rod among the three connecting rods, and the second copper busbar is fixed to the middle connecting rod and the uppermost connecting rod among the three connecting rods.

9. The energy storage cabinet according to any one of claims 1-7, characterized in that, The rear wall of the cluster control box housing faces the rear wall of the cabinet, and the front panel of the cluster control box faces the front wall of the cabinet. The at least two pairs of first power input interfaces and at least two pairs of first power output interfaces are located on the rear wall of the cluster control box housing. The front panel of the cluster control box housing is provided with a low-voltage interface, which includes a gateway interface or a communication interface. The gateway interface is used to connect to an external network or system and realize protocol conversion and data forwarding. The communication interface is used to connect to external devices and perform signal transmission and protocol conversion.

10. The energy storage cabinet according to any one of claims 1-9, characterized in that, At least two pairs of first power input interfaces and at least two pairs of first power output interfaces each include a housing and connection terminals. The connection terminals include two spring arms arranged along the length of the energy storage cabinet and a sleeve for fixing the two spring arms. The sleeve has an annular structure with its opening facing the depth direction of the energy storage cabinet. The sleeve is fitted over the outside of the two spring arms, and a gap is formed between the two spring arms. The gap is used for inserting a copper busbar and making an electrical connection.

11. The energy storage cabinet according to any one of claims 1-10, characterized in that, The rear wall of the cabinet is provided with an air inlet and an air outlet that communicate with the internal cavity of the cabinet. The energy storage cabinet also includes a water tank, which is located on the outer side of the rear wall of the cabinet. The water tank includes a water cavity for containing liquid and an inlet and an outlet communicating with the water cavity. The outlet is connected to an air inlet on the rear wall of the cabinet, and the edge of the outlet is sealed to the rear wall.

12. The energy storage cabinet according to claim 11, characterized in that, The energy storage cabinet also includes a front baffle, which is fixed to the left wall, bottom wall and right wall of the cabinet at the end facing the front wall of the cabinet, and is sealed to the left wall, bottom wall and right wall of the cabinet.

13. The energy storage cabinet according to claim 12, characterized in that, In the height direction of the energy storage cabinet, the air inlet is located below the air outlet; The water tank also includes an opening communicating with the water cavity, the opening being located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet, and the upper edge of the front baffle being located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet.

14. The energy storage cabinet according to claim 13, characterized in that, The energy storage cabinet also includes a frame, which is disposed on the rear wall of the cabinet and forms a receiving cavity with the rear wall of the cabinet. The water tank is disposed in the receiving cavity. The opening communicates with the receiving cavity. The air outlet communicates with the receiving cavity. The frame is provided with a vent communicating with the receiving cavity. The edge of the vent facing the bottom wall of the cabinet is located between the battery cluster and the cluster control box in the height direction of the energy storage cabinet.

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