Convergence cabinet for connecting energy storage equipment and energy storage system

Abstract

The utility model provides a confluence cabinet for connecting energy storage equipment and an energy storage system. The confluence cabinet comprises a plurality of energy storage interfaces, and each energy storage interface is used for being connected with one energy storage device. The busbar structure is connected with the energy storage interface and is used for converging and distributing the electric energy of the plurality of energy storage devices; the surge protector is connected with the busbar structure; and the reserved interface structure is directly and electrically connected with the busbar structure and is used for being connected with external power grid equipment. The reserved interface structure is directly and electrically connected with the busbar structure, a main path switching device between the confluence cabinet and external power grid equipment is omitted, the occupied space of the confluence cabinet is reduced, meanwhile, the surge protector can guide current to be grounded when main path current is too large, and therefore all parts of the confluence cabinet are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a junction box for connecting energy storage equipment and an energy storage system. Background Art

[0002] With the rapid development of renewable energy sources such as solar and wind power, their share of total power generation is increasing. Against this backdrop, energy storage systems are becoming increasingly important, becoming the backbone of maintaining efficient and stable energy grid operations. Energy storage systems can store excess energy and provide additional power to external users during peak demand periods, significantly improving overall energy efficiency and grid resilience.

[0003] As a key component connecting energy storage devices with external grid equipment, combiner cabinets play a crucial role in energy storage systems. They can connect to multiple energy storage devices, collecting power from them and consolidating it for distribution to external grid equipment, meeting high-power output requirements. Utility Model Content

[0004] One object of the present invention is to provide a combiner cabinet and an energy storage system for connecting energy storage equipment, which can reduce the volume of the combiner cabinet to a certain extent.

[0005] In particular, the present invention provides a combiner cabinet for connecting energy storage devices, comprising:

[0006] A plurality of energy storage interfaces, each of which is used to connect to an energy storage device;

[0007] A bus structure connected to the energy storage interface, used to aggregate and distribute electrical energy of a plurality of the energy storage devices;

[0008] a surge protector connected to the busbar structure; and

[0009] At least one reserved interface structure is directly electrically connected to the busbar structure and is used to connect to external power grid equipment.

[0010] Optionally, the energy storage device is configured to transmit power to the busbar cabinet via three-phase alternating current; and each of the energy storage interfaces is a three-phase energy storage interface, the reserved interface structure includes a three-phase reserved interface component, and the busbar structure includes a three-phase busbar;

[0011] Each phase interface of the three-phase energy storage interface is used to connect to a single-phase AC line of the energy storage device, each phase of the bus is connected to a single-phase interface of the three-phase energy storage interface, and each phase of the reserved interface component is connected to a single-phase bus to transmit three-phase AC power to the external power grid equipment via the bus cabinet.

[0012] Optionally, the combiner cabinet further includes:

[0013] Multiple switch groups, the number of the switch groups is the same as the number of the energy storage interfaces, the energy storage interfaces are connected to the energy storage devices via the switch groups, and the switch groups are used to control the on / off of the circuit between the energy storage interfaces and the energy storage devices.

[0014] Optionally, the combiner cabinet further includes:

[0015] An emergency button is configured to control all the switch groups to be disconnected after being activated.

[0016] Optionally, the combiner cabinet includes:

[0017] Three current transformers, wherein the three-phase connection wiring between the three-phase reserved interface assembly and the three-phase busbar passes through the three current transformers respectively; and

[0018] An electric energy meter, wherein a voltage detection interface group is connected to the three busbars respectively, and a current detection interface group is connected to the three current transformers. The electric energy meter is used to detect the electric energy transmitted between the external power grid device and the energy storage device.

[0019] Optionally, the reserved interface component includes:

[0020] an adapter having a first connection structure and a second connection structure, wherein the first connection structure is used for corresponding connection with the busbar of one phase; and

[0021] Multiple external components, each of which includes a third connection structure and a fourth connection structure, the third connection structure is used to cooperate with the second connection structure, and the fourth connection structure is used to connect to the external power grid device. The fourth connection structure of each external component is different, so that the corresponding external component can be selected according to different external power grid devices.

[0022] Optionally, the combiner cabinet further includes:

[0023] A monitoring module is used to monitor the operating status of the combiner cabinet. The monitoring module has a wireless communication unit. The monitoring module is connected to the cloud platform through the wireless communication unit and transmits monitoring data to the cloud platform.

[0024] Optionally, the monitoring module further includes:

[0025] A control unit is used to control the connection and disconnection between the combiner cabinet and the energy storage device. The control unit is configured to receive a control instruction through the wireless communication unit to control the connection and disconnection between the combiner cabinet and the energy storage device via the control instruction.

[0026] Optionally, the combiner cabinet includes ten energy storage interfaces, and the combiner cabinet is configured to allow a current greater than or equal to 2400 amperes to flow therethrough.

[0027] In another aspect of the present invention, there is provided an energy storage system, comprising a combiner cabinet according to any one of the above items; and

[0028] A plurality of energy storage devices are connected to the combiner cabinet.

[0029] The combiner cabinet and energy storage system of the present invention utilize a reserved interface structure to directly electrically connect to the busbar structure, eliminating the main circuit breaker between the combiner cabinet and the external power grid equipment. Because the combiner cabinet is used to aggregate the electrical energy of multiple energy storage devices, the aggregated main current is very large. Therefore, if a main circuit breaker is installed between the combiner cabinet and the external power grid equipment, the main circuit breaker must also be very large to handle the high current, which in turn results in an excessively large combiner cabinet. Therefore, by eliminating the main circuit breaker between the combiner cabinet and the external power grid equipment, the size of the combiner cabinet is reduced, thereby reducing the space occupied by the combiner cabinet, facilitating transportation and installation of the combiner cabinet, and also helping to more efficiently utilize the internal space of the combiner cabinet. Furthermore, by providing a surge protector connected to the busbar structure, although no main circuit breaker is installed between the combiner cabinet and the external power grid equipment, the surge protector can direct the current to ground when the main circuit current is excessive, thereby protecting the various components of the combiner cabinet.

[0030] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0032] Figure 1 is a schematic block diagram of an energy storage system according to an embodiment of the present invention;

[0033] Figure 2is a schematic block diagram of the busbar cabinet according to an embodiment of the present application;

[0034] Figure 3 is a schematic circuit diagram of the energy storage system according to an embodiment of the present application;

[0035] Figure 4 is a schematic block diagram of the reserved interface assembly of the busbar cabinet according to an embodiment of the present application;

[0036] Figure 5 is a schematic block diagram of the busbar cabinet according to another embodiment of the present application. DETAILED DESCRIPTION

[0037] It should be understood by those skilled in the art that the embodiments described below are only part of the embodiments of the present application, not all embodiments of the present application, and are intended to explain the technical principles of the present application, not to limit the protection scope of the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor shall fall within the protection scope of the present application.

[0038] As shown in Figure 1 and Figure 2 , in one embodiment, the energy storage system comprises a busbar cabinet 10, a plurality of energy storage devices 20 and at least one external power grid device 30. The plurality of energy storage devices 20 are connected with the busbar cabinet 10. The busbar cabinet 10 is connected with the external power grid device 30. The busbar cabinet 10 can collect the electric energy of the plurality of energy storage devices 20, and collect into a large current to the external power grid device 30.

[0039] Among them, the external power grid device 30 can be a user end load. Or, it can also be a power transformer, that is, the busbar cabinet 10 collects the electric energy of the plurality of energy storage devices 20 into the power supply, and under this structure, the power supply can also be used to supply power to the energy storage device 20 through the busbar cabinet 10.

[0040] As shown in Figures 1 to 3 , further, the busbar cabinet 10 comprises a plurality of energy storage interfaces 100, a busbar structure 200, a reserved interface structure 300 and a surge protector 400. Each energy storage interface 100 is used to connect with one energy storage device 20. The busbar structure 200 is connected with the energy storage interface 100, and is used to converge and distribute the electric energy of the plurality of energy storage devices 20. The reserved interface structure 300 is directly electrically connected with the busbar structure 200, and is used to connect with the external power grid device 30. The surge protector 400 is connected with the busbar structure 200.

[0041] Referring to Figures 1 to 3As shown, the energy storage device 20 is further configured to transmit power to the combiner cabinet 10 via three-phase AC power. Each energy storage interface 100 is a three-phase energy storage interface, the reserved interface structure 300 includes a three-phase reserved interface assembly 301, and the busbar structure 200 includes a three-phase busbar 201. Each phase of the three-phase energy storage interface is used to connect to a corresponding one-phase AC line of the energy storage device 20, each phase busbar 201 is connected to a corresponding one-phase interface of the three-phase energy storage interface, and each phase reserved interface assembly 301 is connected to a corresponding one-phase busbar 201, thereby transmitting three-phase AC power to the external power grid device 30 via the combiner cabinet 10.

[0042] Continue to refer to Figures 1 to 3 Specifically, each energy storage device 20 is connected to the combiner cabinet 10 via three transmission lines, or three-phase transmission lines. Each energy storage interface 100 is a three-phase energy storage interface, i.e., three interfaces, each for connecting to a transmission line, or one phase, from the energy storage device 20. In other words, the three-phase energy storage interfaces are each connected to a three-phase transmission line from the energy storage device 20.

[0043] Furthermore, the busbar structure 200 includes three busbars 201, i.e., three busbars 201. Each busbar 201 is used to connect to one interface, or one phase interface, of each energy storage interface 100. In other words, the three-phase busbars 201 of the busbar structure 200 are respectively connected to the three-phase interfaces of the energy storage interface 100. Based on the above, one energy storage device 20 is connected to the busbar structure 200 via one energy storage interface 100 in three phases, so that the three-phase AC power from the energy storage device 20 flows through the energy storage interface 100 to the busbar structure 200.

[0044] Correspondingly, multiple energy storage devices 20 are respectively connected to multiple energy storage interfaces 100, and multiple energy storage interfaces 100 are all connected to the bus structure 200, so that the three-phase AC power from the multiple energy storage devices 20 flows to the bus structure 200 through their respective corresponding energy storage interfaces 100, and the electric energy is aggregated in the bus structure 200.

[0045] For more clearly illustrating the present scheme, the three-phase energy storage interfaces are respectively denoted as A-phase interface, B-phase interface and C-phase interface (A-phase, B-phase and C-phase are the usual designations of three-phase for those skilled in the art), and the three-phase busbars 201 of the busbar structure 200 are respectively denoted as A-phase busbar, B-phase busbar and C-phase busbar. For the energy storage device 20 and the respective energy storage interface 100, the A-phase line from the energy storage device 20 is connected to the A-phase interface of the energy storage interface 100, the B-phase line from the energy storage device 20 is connected to the B-phase interface of the energy storage interface 100, and the C-phase line from the energy storage device 20 is connected to the C-phase interface of the energy storage interface 100. All the energy storage interfaces 100 are connected to the busbar structure 200, specifically, the A-phase interfaces of all the energy storage interfaces 100 are connected to the A-phase busbar of the busbar structure 200, the B-phase interfaces of all the energy storage interfaces 100 are connected to the B-phase busbar of the busbar structure 200, and the C-phase interfaces of all the energy storage interfaces 100 are connected to the C-phase busbar of the busbar structure 200.

[0046] It should be noted that the energy storage interface can be directly arranged on the busbar structure, that is, each phase interface of all the energy storage interfaces is arranged on the corresponding one-phase busbar. Alternatively, each phase interface of the energy storage interface can be connected to the corresponding one-phase busbar through an electric wire.

[0047] Continuing to refer to Figures 1 to 3 As shown, the reserved interface structure 300 includes a three-phase reserved interface assembly 301, that is, three reserved interface assemblies 301. Each reserved interface assembly 301 is connected to one busbar 201, or one one-phase busbar 201, that is, the three-phase reserved interface assembly 301 of the reserved interface structure 300 is respectively connected to the three-phase busbar 201 of the busbar structure 200 in a corresponding manner. The reserved interface assembly 301 is used to be connected to the external grid device 30, so as to transmit the electric energy from the energy storage device 20 to the external grid device 30. Alternatively, in the case that the external grid device 30 is a commercial power supply, the commercial power supply can also be reversely transmitted to the energy storage device 20 through the busbar cabinet 10 for charging.

[0048] It should be noted that the reserved interface structure can be directly arranged on the busbar structure, that is, each phase reserved interface assembly of the reserved interface structure is arranged on the corresponding one-phase busbar. Alternatively, the reserved interface structure can be connected to the busbar structure through an electric wire.

[0049] In addition, the reserved interface structure 300 is directly electrically connected to the busbar structure 200, that is, there is no other intermediate electrical device between the reserved interface structure 300 and the busbar structure 200, that is, there is no switching device between the busbar cabinet 10 and the external grid device 30, that is, the main circuit switch between the busbar cabinet 10 and the external grid device 30 is omitted.

[0050] As Figures 1 to 3As shown, the surge protector 400 is connected to the busbar structure 200 and is used to guide the current to ground when the combiner cabinet 10 is struck by lightning or other special circumstances occur, resulting in excessive current in the line, thereby protecting the various components of the combiner cabinet 10.

[0051] In the solution of this embodiment, by utilizing the reserved interface structure 300 to directly electrically connect to the busbar structure 200, the main circuit breaker device between the combiner cabinet 10 and the external power grid equipment 30 is eliminated. Because the combiner cabinet 10 is used to aggregate the electrical energy of multiple energy storage devices 20, the aggregated main circuit current is very large. Therefore, if a main circuit breaker device is installed between the combiner cabinet 10 and the external power grid equipment 30, the main circuit breaker device must also be very large to handle the high current, which in turn results in an excessively large size of the combiner cabinet 10. Therefore, by eliminating the main circuit breaker device between the combiner cabinet 10 and the external power grid equipment 30, the size of the combiner cabinet 10 is reduced, thereby reducing the space occupied by the combiner cabinet 10, facilitating the transportation and installation of the combiner cabinet 10, and saving space within the combiner cabinet 10, thereby facilitating more efficient use of the internal space of the combiner cabinet 10.

[0052] At the same time, by providing a surge protector 400 connected to the busbar structure 200, although no main circuit switch device is provided between the combiner cabinet 10 and the external grid equipment 30, the surge protector 400 can guide the current to ground when the main circuit current is too large, thereby protecting the various components of the combiner cabinet 10.

[0053] In addition, by configuring the energy storage device 20 to transmit power to the combiner cabinet 10 via three-phase alternating current, that is, the current from the energy storage device 20 directly enters the combiner cabinet 10 in the form of three-phase alternating current, without the need to convert direct current into alternating current in the combiner cabinet 10. In other words, there is no need to set an inverter in the combiner cabinet 10, but the inverter is set on the side of the energy storage device 20, thereby further reducing the size of the combiner cabinet 10.

[0054] It should be noted that the number of energy storage interfaces shown in the figure is only an example, and those skilled in the art can set the specific number of energy storage interfaces as needed, for example, it can be set to three, four, five or more.

[0055] like Figures 1 to 3 As shown, the combiner cabinet 10 also includes multiple switch groups 500. The number of switch groups 500 is the same as the number of energy storage interfaces 100. The energy storage interfaces 100 are connected to the energy storage devices 20 via the switch groups 500. The switch groups 500 are used to control the circuit between the energy storage interfaces 100 and the energy storage devices 20. Specifically, the switch groups 500 are three-phase four-wire switches, which are installed in the three-phase circuit between the energy storage devices 20 and the combiner cabinet 10.

[0056] By disposing switch groups 500 between the combiner cabinet 10 and multiple energy storage devices 20, and using the switch groups 500 to control the circuit between the energy storage interface 100 and the corresponding energy storage device 20, the current loop between the combiner cabinet 10 and a specific energy storage device 20 can be individually disconnected without affecting the connection between other energy storage devices 20 and the combiner cabinet 10. This helps to improve the flexibility of the combiner cabinet 10 and effectively prevent the failure of a single energy storage device 20 from causing a failure of the entire system. Moreover, because no main circuit switch device is provided, but only a switch is provided on the energy storage device 20 side, confusion in the operation of upper and lower switches can be avoided.

[0057] like Figures 1 to 3 As shown, the combiner cabinet 10 further includes an emergency button 600. The emergency button 600 is configured to disconnect all switch groups 500 when activated. Specifically, the emergency button 600 can be disposed on an outer surface of the combiner cabinet 10. When the emergency button 600 is activated, i.e., pressed, it disconnects all switch groups 500 in the combiner cabinet 10, thereby stopping the combiner cabinet 10 in an emergency and improving the safety of the combiner cabinet 10.

[0058] Reference Figures 1 to 4 As shown, the reserved interface assembly 301 includes an adapter 3011 and multiple external connectors 3012. The adapter 3011 has a first connection structure and a second connection structure. The first connection structure is used to connect to a single-phase busbar 201. Each external connector 3012 includes a third connection structure and a fourth connection structure. The third connection structure is used to cooperate with the second connection structure, and the fourth connection structure is used to connect to the external power grid device 30. The fourth connection structure of each external connector 3012 is different, so that the corresponding external connector 3012 can be selected according to different external power grid devices 30.

[0059] Reference Figures 1 to 4 Specifically, each reserved interface assembly 301 includes an adapter 3011 and multiple replaceable external components 3012. Different external components 3012 can connect to different external power grid devices 30. Thus, the corresponding external component 3012 can be replaced on the adapter 3011 according to the type of external power grid device 30 to be connected. In other words, the reserved interface structure 300 can be connected to different types of external power grid devices 30 by replacing the external components 3012.

[0060] The reserved interface assembly 301 is configured as an adapter 3011 and multiple external connectors 3012. The adapter 3011 has a first connection structure and a second connection structure. The first connection structure is used to connect to a single-phase busbar 201. Each external connector 3012 includes a third connection structure and a fourth connection structure. The third connection structure is used to cooperate with the second connection structure, and the fourth connection structure is used to connect to an external power grid device 30. The fourth connection structure of each external connector 3012 is different, so that a corresponding external connector 3012 can be selected according to different external power grid devices 30. In other words, each reserved interface assembly 301 includes an adapter 3011 and multiple replaceable external connectors 3012. Different external connectors 3012 can connect to different external power grid devices 30. Therefore, the corresponding external connector 3012 can be replaced on the adapter 3011 according to the type of external power grid device 30 to be connected. This allows the combiner cabinet 10 to flexibly connect to a variety of external power grid devices 30, thereby improving the flexibility of use of the combiner cabinet 10.

[0061] Moreover, since the combiner cabinet 10 of this embodiment does not have a main circuit breaker device, the internal space is sufficient to provide storage space for more external components 3012.

[0062] like Figures 1 to 3 As shown, the combiner cabinet 10 includes three current transformers 700 and an electric energy meter 800. The three-phase connection wiring between the three-phase reserved interface assembly 301 and the three-phase busbar 201 passes through each of the three current transformers 700. The electric energy meter 800 has a voltage detection interface group connected to each of the three busbars 201, and a current detection interface group connected to the three current transformers 700. The electric energy meter 800 is used to detect the electric energy transmitted between the external power grid device 30 and the energy storage device 20.

[0063] By providing a current transformer 700 and an electric energy meter 800 in the combiner cabinet 10, the electric energy meter 800 can be used to detect the electric energy transmitted between the external grid device 30 and the energy storage device 20. Specifically, the electric energy transmitted from the energy storage device 20 to the external grid device 30, and the electric energy transmitted from the mains to the external grid device 30 when the external grid device 30 is powered by mains electricity, thereby enabling real-time monitoring of the working status of the combiner cabinet 10 and better control of the charging and discharging timing of the energy storage device 20.

[0064] like Figure 1 and Figure 5As shown, in another embodiment, the combiner cabinet 10 further includes a monitoring module 900, which is used to monitor the operating status of the combiner cabinet 10. The monitoring module 900 includes a wireless communication unit 910. The monitoring module 900 connects to a cloud platform via the wireless communication unit 910 and transmits monitoring data to the cloud platform. Specifically, the monitoring module 900 can monitor relevant device parameters of the combiner cabinet 10, such as current, voltage, and temperature, and connects to the cloud platform via the wireless communication unit 910 to transmit the monitoring data to the cloud platform in real time. This allows the administrator to promptly monitor the operating status of the combiner cabinet 10 and, in turn, promptly detect any faults in the combiner cabinet 10.

[0065] like Figure 1 and Figure 5 As shown, the monitoring module 900 further includes a control unit 920, which is used to control the connection and disconnection between the flow combiner cabinet 10 and the energy storage device 20. The control unit 920 is configured to receive control instructions through the wireless communication unit 910 to control the connection and disconnection between the flow combiner cabinet 10 and the energy storage device 20 via the control instructions.

[0066] Combine Figure 3 Specifically, the control unit 920 can be connected to the switch group 500 to control the on / off of the switch group 500. Furthermore, the control unit 920 is connected to the wireless communication unit 910. An administrator can use a mobile device or remote control device to send control instructions to the control unit 920 via the wireless communication unit 910, thereby remotely controlling the on / off of the switch group 500, that is, remotely controlling the on / off between the combiner cabinet 10 and the energy storage device 20.

[0067] In the solution of this embodiment, a wireless communication unit 910 and a control unit 920 are set in the monitoring module 900, and the control unit 920 is used to control the connection and disconnection between the junction cabinet 10 and the energy storage device 20, and the control unit 920 is configured to receive control instructions through the wireless communication unit 910, so that the control unit 920 can remotely receive control instructions to control the connection and disconnection between the junction cabinet 10 and the energy storage device 20, thereby improving the flexibility and timeliness of the control of the junction cabinet 10.

[0068] In a preferred embodiment, the combiner cabinet includes ten energy storage interfaces and is configured to allow a current of 2400 amperes or greater. Specifically, the combiner cabinet can connect to ten energy storage devices, allowing a maximum combined current of 2400 amperes or greater. This meets the needs of most external grid equipment, while also ensuring a reasonable number of energy storage devices and facilitating their management.

[0069] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention can be directly determined or deduced from the contents disclosed herein without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A combiner cabinet for connecting energy storage equipment, characterized in that: include: A plurality of energy storage interfaces, each of which is used to connect to an energy storage device; A bus structure connected to the energy storage interface, used to aggregate and distribute electrical energy of a plurality of the energy storage devices; a surge protector connected to the bus structure; and At least one reserved interface structure is directly electrically connected to the busbar structure and is used to connect to external power grid equipment.

2. The combiner cabinet for connecting energy storage equipment according to claim 1, characterized in that: The energy storage device is configured to transmit electric energy to the busbar cabinet via three-phase alternating current; and each of the energy storage interfaces is a three-phase energy storage interface, the reserved interface structure includes a three-phase reserved interface component, and the busbar structure includes a three-phase busbar; Each phase interface of the three-phase energy storage interface is used to connect to a single-phase AC line of the energy storage device, each phase of the bus is connected to a single-phase interface of the three-phase energy storage interface, and each phase of the reserved interface component is connected to a single-phase bus to transmit three-phase AC power to the external power grid equipment via the bus cabinet.

3. The combiner cabinet for connecting energy storage equipment according to claim 2, characterized in that: The combiner cabinet further comprises: Multiple switch groups, the number of the switch groups is the same as the number of the energy storage interfaces, the energy storage interfaces are connected to the energy storage devices via the switch groups, and the switch groups are used to control the on / off of the circuit between the energy storage interfaces and the energy storage devices.

4. The combiner cabinet for connecting energy storage equipment according to claim 3, characterized in that: The combiner cabinet further comprises: An emergency button is configured to control all the switch groups to be disconnected after being activated.

5. The combiner cabinet for connecting energy storage equipment according to claim 2, characterized in that: The combiner cabinet comprises: Three current transformers, wherein the three-phase connection wiring between the three-phase reserved interface assembly and the three-phase busbar passes through the three current transformers respectively; and An electric energy meter, wherein a voltage detection interface group is connected to the three busbars respectively, and a current detection interface group is connected to the three current transformers. The electric energy meter is used to detect the electric energy transmitted between the external power grid device and the energy storage device.

6. The combiner cabinet for connecting energy storage equipment according to claim 2, characterized in that: The reserved interface component includes: an adapter having a first connection structure and a second connection structure, wherein the first connection structure is used for corresponding connection with the busbar of one phase; and Multiple external components, each of which includes a third connection structure and a fourth connection structure, the third connection structure is used to cooperate with the second connection structure, and the fourth connection structure is used to connect to the external power grid device. The fourth connection structure of each external component is different, so that the corresponding external component can be selected according to different external power grid devices.

7. The combiner cabinet for connecting energy storage equipment according to claim 1, characterized in that: The combiner cabinet further comprises: A monitoring module is used to monitor the operating status of the combiner cabinet. The monitoring module has a wireless communication unit. The monitoring module is connected to the cloud platform through the wireless communication unit and transmits monitoring data to the cloud platform.

8. The combiner cabinet for connecting energy storage equipment according to claim 7, characterized in that: The monitoring module also includes: A control unit is used to control the connection and disconnection between the combiner cabinet and the energy storage device. The control unit is configured to receive a control instruction through the wireless communication unit to control the connection and disconnection between the combiner cabinet and the energy storage device via the control instruction.

9. The combiner cabinet for connecting energy storage equipment according to claim 1, characterized in that: The combiner cabinet includes ten energy storage interfaces, and the combiner cabinet is configured to allow a current greater than or equal to 2400 amperes to flow therethrough.

10. An energy storage system, characterized in that: include: The combiner cabinet according to any one of claims 1 to 9; and A plurality of energy storage devices are connected to the combiner cabinet.

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