High-voltage box and energy storage system

Abstract

The utility model relates to a high-voltage box and an energy storage system. In the high-voltage box, each control sub-loop is connected with an isolating switch; the first interface group is connected with the isolating switch and is used for connecting a confluence cabinet; the second interface groups are connected with the control sub-loops in a one-to-one correspondence manner; and the second interface group is used for connecting the corresponding battery clusters so as to control the at least two battery clusters. Layout improvement is carried out on electrical components in the high-voltage box, at least two control sub-loops are connected through a single isolation switch, the control sub-loops are connected with the battery clusters through corresponding second interface groups, and the first interface group is connected with the conflux cabinet by arranging the first interface group and the at least two second interface groups in the high-voltage box. And the second interface group is connected with the corresponding battery cluster, so that at least two battery clusters can be independently controlled in the same high-voltage box, electrical interfaces of the high-voltage box are reduced, external wiring is simplified, and the risk of wiring errors is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a high-voltage box and an energy storage system. Background Art

[0002] With increasing demands for volumetric energy density in battery energy storage systems, larger-capacity cells and more compact electrical layouts are required within the same container size. Typically, a single battery cluster is controlled by a single high-voltage box. For example, if two battery clusters are arranged in a row, a dual-high-voltage box control solution is used. This arrangement uses the space available for one high-voltage box in the container, but the internal space of a single narrow high-voltage box is limited, restricting the internal electrical layout and making it difficult to install and maintain electrical components.

[0003] To improve the unit volume utilization of energy storage systems, existing approaches typically employ two battery clusters sharing a single high-voltage box. For example, two battery clusters are arranged in a row, with two sets of high-voltage box electrical components housed within the same box. However, the high-voltage box has numerous electrical interfaces, making external wiring complex and posing a significant risk of miswiring. Utility Model Content

[0004] Based on this, a high-voltage box and an energy storage system are provided.

[0005] In a first aspect, the present application provides a high-voltage box, comprising:

[0006] Isolating switches;

[0007] The control circuit includes at least two control sub-circuits; each control sub-circuit is connected to an isolating switch;

[0008] The first interface group is connected to the isolating switch and is used to connect to the combiner cabinet;

[0009] At least two second interface groups are provided, each second interface group being connected to each control sub-circuit in a one-to-one correspondence; the second interface groups are used to connect to corresponding battery clusters.

[0010] In one embodiment, the isolating switch includes a first positive terminal and a first negative terminal; the second interface group includes a second positive interface and a second negative interface; the control sub-circuit includes a positive branch and a negative branch;

[0011] The positive branch is connected between the second positive electrode interface and the first positive terminal of the isolating switch; the negative branch is connected between the second negative electrode interface and the first negative terminal of the isolating switch.

[0012] In one embodiment, the positive branch includes a first fuse and a first relay; the first fuse and the first relay are connected in series between the second positive terminal and the first positive terminal of the disconnector.

[0013] In one embodiment, the positive branch further includes a first current sensor;

[0014] The first fuse, the first relay, and the first current sensor are connected in series between the second positive electrode interface and the first positive terminal of the disconnector.

[0015] In one embodiment, the negative branch includes a second fuse and a second relay; the second fuse and the second relay are connected in series between the second negative terminal and the first negative terminal of the isolation switch.

[0016] In one embodiment, the negative branch further includes a second current sensor;

[0017] The second fuse, the second relay and the second current sensor are connected in series between the second negative electrode interface and the first negative terminal of the isolation switch.

[0018] In one embodiment, the high-voltage box further includes a pre-charge circuit;

[0019] The first end of the pre-charging loop is connected to the first end of the first relay in one of the positive branches, and the second end of the pre-charging loop is connected to the second end of the corresponding first relay.

[0020] In one embodiment, the high-voltage box further includes a main control circuit;

[0021] The first end of the main control loop is connected to the first end of the first relay in another positive branch, and the second end of the main control loop is connected to the second end of the corresponding first relay.

[0022] In one embodiment, the high-voltage box further includes a box body;

[0023] The isolating switch and the control circuit are respectively arranged in the box; the first interface group is arranged on the first side surface of the box, and each second interface group is arranged on the first side surface or the second side surface of the box.

[0024] In a second aspect, the present application provides an energy storage system comprising at least two battery clusters, a combiner cabinet, and a high-voltage box as described above;

[0025] The high-voltage box is connected to at least two battery clusters respectively, and the high-voltage box is connected to the combiner cabinet.

[0026] One of the above technical solutions has the following advantages and beneficial effects:

[0027] The above-mentioned high-voltage box includes an isolating switch, a control circuit, a first interface group, and at least two second interface groups. The control circuit includes at least two control sub-circuits; each control sub-circuit is respectively connected to the isolating switch; the first interface group is connected to the isolating switch, and the first interface group is used to connect to the junction box; each second interface group is connected to each control sub-circuit in a one-to-one correspondence; the second interface group is used to connect to the corresponding battery cluster, thereby realizing control of at least two battery clusters. The present application improves the layout of the electrical components in the high-voltage box, connects at least two control sub-circuits through a single isolating switch, and the control sub-circuits are connected to the battery clusters through the corresponding second interface groups. By setting the first interface group and at least two second interface groups in the high-voltage box, so that the first interface group is connected to the junction box and the second interface group is connected to the corresponding battery cluster, it is possible to realize independent control of at least two battery clusters in the same high-voltage box, reduce the electrical interfaces of the high-voltage box, simplify the external wiring, and reduce the risk of wiring errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the application of a traditional high-voltage box;

[0029] Figure 2 This is a schematic diagram of the circuit structure of a traditional high-voltage box;

[0030] Figure 3 This is a schematic diagram of the first circuit structure of the high-voltage box in an embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the second circuit structure of the high-voltage box in the embodiment of the present application;

[0032] Figure 5 This is a schematic diagram of the third circuit structure of the high-voltage box in the embodiment of the present application;

[0033] Figure 6 This is a first application diagram of the high-voltage box in an embodiment of the present application.

[0034] Reference numerals:

[0035] 10. High-voltage box; 100. Isolating switch; 20. Control circuit; 200. Control sub-circuit; 210. Positive branch; 212. First fuse; 214. First relay; 216. First current sensor; 220. Negative branch; 222. Second fuse; 224. Second relay; 226. Second current sensor; 30. First interface group; 40. Second interface group; 410. Second positive interface; 420. Second negative interface; 510. Pre-charge circuit; 520. Main control circuit; 60. Combiner cabinet; 70. Battery cluster. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0037] It should be noted that the terms "first," "second," and the like in the specification and claims of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numerals used in this manner are interchangeable where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover inclusions that are not listed. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0038] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0039] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0040] Additionally, the term "plurality" shall mean two or more.

[0041] In a traditional energy storage system, for example, a battery with a capacity of 314Ah and a 5MWh_0.5P (5MWh is the system capacity, 0.5P is the system discharge rate) energy storage system; a battery pack is composed of 1P104S battery cells, and four battery packs form a battery cluster. The entire energy storage system consists of 12 clusters; among them, the 1P104S battery cell refers to a 1-parallel 104-series battery cell.

[0042] like Figure 1 and Figure 2As shown in the figure, in the traditional solution of configuring one high-voltage box for control of two battery clusters, two battery packs (a total of 8 packs) are arranged in the same column, and two sets of high-voltage box electrical components are arranged in the same box, including two isolation switches (the rated current of a single isolation switch is 157A) and two input and output sockets (4 sockets on one side), etc. Figure 1 and Figure 2 In the traditional solution, a single high-voltage box outputs two sets of P+ and P- ports, which are connected to the combiner cabinet via four AWG 2 / 0 cables. This equates to 24 AWG 2 / 0 cables being routed to the combiner cabinet. This excessive number of cables makes installation inconvenient. Furthermore, the combiner cabinet requires more space for wiring holes, and the busbars require more mounting holes. Furthermore, the traditional high-voltage box also contains five to six low-voltage power supply and communication sockets, as well as operating space for two disconnect switches. The numerous electrical interfaces within the high-voltage box complicate external wiring and increase the risk of misconnection.

[0043] The present application optimizes the layout of electrical components in the high-voltage box, thereby simplifying the electrical components in the high-voltage box within a limited installation space, reducing the interfaces of the high-voltage box, and simplifying the wiring of the high-voltage box.

[0044] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] In one embodiment, Figure 3 As shown, a high-voltage box is provided, including an isolating switch 100, a control circuit 20, a first interface group 30 and at least two second interface groups 40. The control circuit 20 includes at least two control sub-circuits 200; each control sub-circuit 200 is respectively connected to the isolating switch 100; the first interface group 30 is connected to the isolating switch 100, and the first interface group 30 is used to connect to the combiner cabinet 60; each second interface group 40 is connected to each control sub-circuit 200 in a one-to-one correspondence; the second interface group 40 is used to connect to the corresponding battery cluster 70.

[0046] The high-voltage box 10 is used in an energy storage system, which can be, but is not limited to, a lithium battery energy storage system. For example, the energy storage system can have a capacity of 5MWh and a discharge rate of 0.5P, and the batteries in the energy storage system can be 314Ah lithium-ion batteries. The isolating switch 100 can use an isolating switch 100 with the same rated current as the rated current of the battery. For example, if the rated current of the battery in the energy storage system is 314Ah, the isolating switch 100 can use an isolating switch 100 with a rated current of 314Ah.

[0047] The control sub-circuit 200 can be used to control the power on and off of the corresponding battery cluster 70. The control sub-circuit 200 can also be used to perform current detection, voltage detection, and current overload short-circuit protection on the corresponding battery cluster 70. The number of control sub-circuits 200 is the same as the number of battery clusters 70 connected to the same high-voltage box 10. For example, if the high-voltage box 10 is a two-in-one high-voltage box 10, the control circuit 20 includes two control sub-circuits 200, and the two control sub-circuits 200 are connected to the two battery clusters 70 in a one-to-one correspondence. The two control sub-circuits 200 are respectively connected to the isolation switch 100, thereby achieving independent control of the two battery clusters 70 through a single high-voltage box 10. For example, the control sub-circuit 200 can be connected to the isolation switch 100 via a conductive bus.

[0048] The first interface group 30 can be an output interface group and can be located on a side of the high-voltage box. The isolating switch 100 can be connected to the first interface group 30 by plugging or welding. The first interface group 30 is used to plug into the combiner cabinet 60, thereby establishing an electrical connection between the combiner cabinet 60 and the high-voltage box 10. Since the high-voltage box 10 is only equipped with a single isolating switch 100, only one first interface group 30 is required. This reduces the number of interfaces within the high-voltage box 10, simplifies the interface layout of the high-voltage box 10, and reduces the risk of incorrect interface connections.

[0049] The second interface group 40 can be an input interface group. The second interface group 40 can be located on the same side of the high-voltage box as the first interface group 30 or on a different side of the box. The number of second interface groups 40 is the same as the number of control sub-circuits 200 in the same high-voltage box 10. For example, if the high-voltage box 10 has two control sub-circuits 200, the high-voltage box 10 is provided with two second interface groups 40. The two control sub-circuits 200 are connected to the two second interface groups 40 in a one-to-one correspondence. The two second interface groups 40 are used to connect to two battery clusters 70 in a one-to-one correspondence, thereby achieving independent control of the two battery clusters 70 through a single high-voltage box 10. For example, the control sub-circuits 200 can be connected to the corresponding second interface groups 40 via cables, and the battery clusters 70 can be connected to the corresponding second interface groups 40 via cables.

[0050] In the above-described embodiment, each control sub-circuit 200 is connected to the isolating switch 100; the first interface group 30 is connected to the isolating switch 100, and the first interface group 30 is connected to the combiner cabinet 60; each second interface group 40 is connected to each control sub-circuit 200 in a one-to-one correspondence; and the second interface group 40 is connected to the corresponding battery cluster 70, thereby achieving control of at least two battery clusters 70. The present application improves the layout of the electrical components within the high-voltage box 10, connecting at least two control sub-circuits 200 through a single isolating switch 100, and connecting the control sub-circuit 200 to the battery cluster 70 through the corresponding second interface group 40. By providing the first interface group 30 and at least two second interface groups 40 within the high-voltage box 10, so that the first interface group 30 is connected to the combiner cabinet 60 and the second interface group 40 is connected to the corresponding battery cluster 70, it is possible to achieve independent control of at least two battery clusters 70 within the same high-voltage box 10, thereby reducing the number of electrical interfaces of the high-voltage box 10, simplifying external wiring, and reducing the risk of wiring errors.

[0051] In one embodiment, Figure 4 As shown, the disconnector 100 includes a first positive terminal and a first negative terminal; the second interface group 40 includes a second positive interface 410 and a second negative interface 420; the control sub-loop 200 includes a positive branch 210 and a negative branch 220; the positive branch 210 is connected between the second positive interface 410 and the first positive terminal of the disconnector 100; the negative branch 220 is connected between the second negative interface 420 and the first negative terminal of the disconnector 100.

[0052] The second positive electrode interface 410 is a B+ interface, and the second negative electrode interface 420 is a B- interface. The first positive terminal of the isolating switch 100 is used to connect to each positive electrode branch 210, and the first negative terminal of the isolating switch 100 is used to connect to each negative electrode branch 220, thereby achieving parallel connection of each control sub-circuit 200 to the isolating switch 100. The positive electrode branch 210 is used to connect to the second positive electrode interface 410 of the corresponding second interface group 40, and the negative electrode branch 220 is used to connect to the second negative electrode interface 420 of the corresponding second interface group 40. By connecting the positive and negative electrodes of the corresponding battery cluster 70 to the second positive electrode interface 410 and the second negative electrode interface 420 of the corresponding second interface group 40, respectively, the control sub-circuit 200 is connected in series with the corresponding battery cluster 70, thereby enabling the control sub-circuit 200 to independently control the operation of the corresponding battery cluster 70.

[0053] Exemplarily, the isolating switch 100 further includes a second positive terminal and a second negative terminal, and the first interface group 30 includes a first positive interface and a first negative interface, wherein the first positive interface is a P+ interface and the first negative interface is a P- interface. The second positive terminal of the isolating switch 100 is connected to the first positive interface of the first interface group 30, and the second negative terminal of the isolating switch 100 is connected to the first negative interface of the first interface group 30. The first positive interface is connected to the positive terminal of the junction box 60 via a plug-in cable, and the first negative interface is connected to the negative terminal of the junction box 60 via a plug-in cable. This allows a single isolating switch 100 in the high-voltage box 10 to be connected to at least two control sub-circuits 200, thereby enabling independent control of at least two battery clusters 70. This reduces the number of electrical interfaces in the high-voltage box 10, simplifies external wiring, and reduces the risk of wiring errors.

[0054] In one embodiment, Figure 5 As shown, the positive branch 210 includes a first fuse 212 and a first relay 214 ; the first fuse 212 and the first relay 214 are connected in series between the second positive terminal 410 and the first positive terminal of the disconnector 100 .

[0055] The first fuse 212 protects the electrical equipment within the high-voltage box 10 from damage due to overcurrent, short circuits, and other factors. For example, if excessive current flows through the corresponding battery cluster 70 during charging or discharging, the first fuse 212 quickly disconnects the circuit, enhancing the safety of the corresponding control sub-circuit 200. The first relay 214 controls the on / off state of the positive branch 210 of the corresponding control sub-circuit 200, controlling the state of the output circuit based on changes in the input signal. The first relay 214 also provides overcurrent, overvoltage, and undervoltage protection for the corresponding control sub-circuit 200.

[0056] For example, a first end of the first fuse 212 is connected to a corresponding second positive electrode interface 410, a second end of the first fuse 212 is connected to a first end of a corresponding first relay 214, and a second end of the first relay 214 is connected to a first positive terminal of the disconnector 100, thereby forming a positive branch 210 of the control sub-circuit 200. A corresponding negative branch 220 is connected between the second negative electrode interface 420 and the first negative terminal of the disconnector 100, thereby enabling a single disconnector 100 to connect to at least two control sub-circuits 200. Each control sub-circuit 200 is connected to a battery cluster 70 via a corresponding second interface group 40. By providing a first interface group 30 and at least two second interface groups 40 within the high-voltage box 10, such that the first interface group 30 is connected to the combiner cabinet 60 and the second interface group 40 is connected to a corresponding battery cluster 70, independent control of a single battery cluster 70 can be achieved, enabling power-on and power-off and current overload short-circuit protection for the single cluster, optimizing the layout of electrical components within the high-voltage box 10, and facilitating component installation and maintenance.

[0057] In one embodiment, Figure 5 As shown, the positive branch 210 further includes a first current sensor 216 ; the first fuse 212 , the first relay 214 and the first current sensor 216 are connected in series between the second positive terminal 410 and the first positive terminal of the disconnector 100 .

[0058] The first current sensor 216 may be a Hall sensor, and the first current sensor 216 may be used to detect the current during the charging and discharging process of the corresponding battery cluster 70 .

[0059] Based on the first fuse 212, the first relay 214 and the first current sensor 216 being connected in series between the second positive electrode interface 410 and the first positive terminal of the disconnector 100, a positive branch 210 of the corresponding control sub-circuit 200 is formed, which is connected between the second positive electrode interface 410 and the first positive terminal of the disconnector 100 through the positive branch 210; the negative branch 220 is connected between the second negative electrode interface 420 and the first negative terminal of the disconnector 100, so that a single disconnector 100 is connected to at least two control sub-circuits 200. The control sub-circuit 200 is connected to the battery cluster 70 through the corresponding second interface group 40, meeting the independent control of a single battery cluster 70, and can respectively realize power on and off, current detection and current overload short-circuit protection of a single cluster, thereby optimizing the layout of electrical components inside the high-voltage box 10 and facilitating component installation and maintenance operations.

[0060] In one embodiment, Figure 5 As shown, the negative branch 220 includes a second fuse 222 and a second relay 224 ; the second fuse 222 and the second relay 224 are connected in series between the second negative electrode interface 420 and the first negative terminal of the disconnector 100 .

[0061] The second fuse 222 protects the electrical equipment within the high-voltage box 10 from damage due to overcurrent, short circuits, and other factors. For example, if excessive current flows through the corresponding battery cluster 70 during charging or discharging, the second fuse 222 quickly disconnects the circuit, enhancing the safety of the corresponding control sub-circuit 200. The second relay 224 controls the on / off state of the negative branch 220 of the corresponding control sub-circuit 200, controlling the state of the output circuit based on changes in the input signal. The second relay 224 also provides overcurrent, overvoltage, and undervoltage protection for the corresponding control sub-circuit 200.

[0062] For example, a first end of the second fuse 222 is connected to a corresponding second negative electrode interface 420, a second end of the second fuse 222 is connected to a first end of a corresponding second relay 224, and a second end of the second relay 224 is connected to the first negative terminal of the disconnector 100, thereby forming a negative branch 220 of the control sub-circuit 200. By connecting the corresponding positive branch 210 between the second positive electrode interface 410 and the first positive terminal of the disconnector 100, a single disconnector 100 is connected to at least two control sub-circuits 200, and the control sub-circuit 200 is connected to the battery cluster 70 via the corresponding second interface group 40. By providing a first interface group 30 and at least two second interface groups 40 within the high-voltage box 10, so that the first interface group 30 is connected to the combiner cabinet 60 and the second interface group 40 is connected to the corresponding battery cluster 70, independent control of a single battery cluster 70 can be achieved, and power-on and power-off and current overload short-circuit protection of the single cluster can be implemented separately. This optimizes the layout of electrical components within the high-voltage box 10 and facilitates component installation and maintenance operations.

[0063] In one embodiment, Figure 5 As shown, the negative branch 220 further includes a second current sensor 226 ; the second fuse 222 , the second relay 224 and the second current sensor 226 are connected in series between the second negative electrode interface 420 and the first negative terminal of the isolation switch 100 .

[0064] The second current sensor 226 can be used to detect the current of the corresponding battery cluster 70. The second current sensor 226 can be a current divider and can also be used to distribute and control the input current of the corresponding battery cluster 70. For example, by collecting voltage from the low current signal output by the second current sensor 226, damage to circuit components caused by excessive current during voltage collection of the corresponding battery cluster 70 can be avoided.

[0065] Based on the second fuse 222, the second relay 224 and the second current sensor 226 being connected in series between the second negative electrode interface 420 and the first negative terminal of the disconnector 100, a negative branch 220 of the corresponding control sub-circuit 200 is formed, which is connected between the second negative electrode interface 420 and the first negative terminal of the disconnector 100 through the negative branch 220; the positive branch 210 is connected between the second positive electrode interface 410 and the first positive terminal of the disconnector 100, so that a single disconnector 100 is connected to at least two control sub-circuits 200, and the control sub-circuit 200 is connected to the battery cluster 70 through the corresponding second interface group 40, meeting the independent control of a single battery cluster 70, and can respectively realize the power on and off, voltage detection and current overload short-circuit protection of a single cluster, thereby optimizing the layout of the electrical components inside the high-voltage box 10 and facilitating the installation and maintenance operations of the components.

[0066] In one embodiment, Figure 5 As shown, the high-voltage box 10 further includes a pre-charging circuit 510 ; a first end of the pre-charging circuit 510 is connected to a first end of a first relay 214 in one of the positive branches 210 , and a second end of the pre-charging circuit 510 is connected to a second end of the corresponding first relay 214 .

[0067] The pre-charge circuit 510 may include a third fuse and a pre-charge relay. The first end of the pre-charge relay is connected to the first end of the first relay 214 in the corresponding positive branch 210, the second end of the pre-charge relay is connected to the first end of the third fuse, and the second end of the third fuse is connected to the second end of the corresponding first relay 214. By controlling the on / off state of the pre-charge circuit 510, pre-charge control of the corresponding battery cluster 70 can be achieved, optimizing the layout of the electrical components within the high-voltage box 10.

[0068] In one embodiment, Figure 5 As shown, the high-voltage box 10 also includes a main control circuit 520; the first end of the main control circuit 520 is connected to the first end of the first relay 214 in another positive branch 210, and the second end of the main control circuit 520 is connected to the second end of the corresponding first relay 214.

[0069] The main control circuit 520 may include a fourth fuse and a main relay. The first end of the main relay is connected to the first end of the first relay 214 in the corresponding positive branch 210. The second end of the main relay is connected to the first end of the fourth fuse, and the second end of the fourth fuse is connected to the second end of the corresponding first relay 214. By controlling the on / off of the main control circuit 520, the power-on and power-off of the corresponding battery cluster 70 can be controlled.

[0070] In one example, the first interface group 30 may adopt an input socket structure, and the second interface group 40 may adopt an output socket structure. The shape of the first interface group 30 is different from the shape of the second interface group 40, and / or the size of the first interface group 30 is different from the size of the second interface group 40, thereby facilitating foolproofing and further reducing the risk of incorrect cable connection.

[0071] In one embodiment, the high-voltage box 10 also includes a box body; the isolating switch 100 and the control circuit 20 are respectively arranged in the box body; the first interface group 30 is arranged on the first side of the box body, and each second interface group 40 is arranged on the first side or the second side of the box body.

[0072] The first side surface may be the front panel of the box, and the second side surface may be a side surface adjacent to or opposite to the first side surface. For example, the first interface group 30 and each second interface group 40 are both disposed on the first side surface of the box. Since only a single disconnector 100 is disposed within the high-voltage box 10, only one first interface group 30 needs to be disposed on the first side surface of the box. This reduces the number of electrical interfaces on the high-voltage box 10, simplifies the interface layout on the first side surface of the box, and reduces hardware costs.

[0073] In one embodiment, Figure 6 As shown, an energy storage system is also provided, including at least two battery clusters 70, a combiner cabinet 60 and a high-voltage box 10 as described above; the high-voltage box 10 is respectively connected to the at least two battery clusters 70, and the high-voltage box 10 is connected to the combiner cabinet 60.

[0074] The detailed description of the battery cluster 70 , the combiner cabinet 60 and the high-voltage box 10 may refer to the detailed description of the battery cluster 70 , the combiner cabinet 60 and the high-voltage box 10 in the above embodiment, which will not be repeated here.

[0075] For example, the energy storage system may include a PCS (energy storage converter), a combiner cabinet 60, 12 battery clusters 70, and 6 high-voltage boxes 10. One high-voltage box 10 is connected to two battery clusters 70, each high-voltage box 10 is connected to a combiner cabinet 60, and the combiner cabinet 60 is connected to the PCS. The cables from the high-voltage box 10 to the combiner cabinet 60 are optimized to 12 AWG 4 / 0 cables to facilitate cable installation. At the same time, the wiring space is better and the installation openings are reduced, which facilitates installation and maintenance.

[0076] In the above-described embodiment, by improving the layout of the electrical components within the high-voltage box 10, at least two control sub-circuits 200 are connected via a single isolating switch 100, and the control sub-circuits 200 are connected to the battery clusters 70 via corresponding second interface groups 40. By providing a first interface group 30 and at least two second interface groups 40 within the high-voltage box 10, such that the first interface group 30 is connected to the combiner cabinet 60 and the second interface group 40 is connected to the corresponding battery clusters 70, the same high-voltage box 10 can be used to independently control at least two battery clusters 70. This reduces the number of electrical interfaces of the high-voltage box 10, simplifies external wiring, reduces the risk of wiring errors, and facilitates installation and maintenance operations of the high-voltage box 10 in the energy storage system.

[0077] It should be noted that the energy storage system may also include components such as a container body. The specific energy storage system may include more components than those described in the above embodiments, or combine certain components, or have a different component arrangement.

[0078] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A high-voltage box, characterized in that: include: Isolating switches; A control circuit, the control circuit comprising at least two control sub-circuits; each of the control sub-circuits is connected to the isolating switch; a first interface group, the first interface group being connected to the isolating switch and used to connect to a combiner cabinet; At least two second interface groups, each second interface group is connected to each control sub-circuit in a one-to-one correspondence; the second interface group is used to connect to a corresponding battery cluster.

2. The high-voltage box according to claim 1, characterized in that: The isolating switch includes a first positive terminal and a first negative terminal; the second interface group includes a second positive interface and a second negative interface; the control sub-circuit includes a positive branch and a negative branch; The positive branch is connected between the second positive electrode interface and the first positive terminal of the isolating switch; the negative branch is connected between the second negative electrode interface and the first negative terminal of the isolating switch.

3. The high-voltage box according to claim 2, characterized in that: The positive branch includes a first fuse and a first relay; the first fuse and the first relay are connected in series between the second positive interface and the first positive terminal of the isolation switch.

4. The high-voltage box according to claim 3, characterized in that: The positive branch further includes a first current sensor; The first fuse, the first relay, and the first current sensor are connected in series between the second positive electrode interface and the first positive terminal of the isolation switch.

5. The high-voltage box according to claim 2, characterized in that: The negative electrode branch includes a second fuse and a second relay; the second fuse and the second relay are connected in series between the second negative electrode interface and the first negative terminal of the isolation switch.

6. The high-voltage box according to claim 5, characterized in that: The negative electrode branch further includes a second current sensor; The second fuse, the second relay, and the second current sensor are connected in series between the second negative electrode interface and the first negative terminal of the isolation switch.

7. The high-voltage box according to claim 3, characterized in that: It also includes a pre-charge circuit; The first end of the pre-charging loop is connected to the first end of the first relay in one of the positive branches, and the second end of the pre-charging loop is connected to the second end of the corresponding first relay.

8. The high-voltage box according to claim 7, characterized in that: It also includes the main control circuit; The first end of the main control loop is connected to the first end of the first relay in another positive branch, and the second end of the main control loop is connected to the second end of the corresponding first relay.

9. The high-voltage box according to any one of claims 1 to 8, characterized in that: Also includes the box; The isolating switch and the control circuit are respectively arranged in the box; the first interface group is arranged on the first side surface of the box, and each of the second interface groups is arranged on the first side surface or the second side surface of the box.

10. An energy storage system, characterized in that: It comprises at least two battery clusters, a combiner cabinet and a high-voltage box as claimed in any one of claims 1 to 9; The high-voltage box is connected to at least two battery clusters respectively, and the high-voltage box is connected to the combiner cabinet.

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