Electric energy storage cabinet, confluence cabinet and electric energy storage system

Abstract

The invention relates to an electric energy storage cabinet, a confluence cabinet and an electric energy storage system, and belongs to the technical field of electric energy storage, the top of an energy storage cabinet body is provided with an alternating current bus chamber, two side walls of the energy storage cabinet body are provided with a wire inlet end socket and a wire outlet end socket, the alternating current bus chamber is internally provided with A, B, C and N phase cable copper buses, the wire inlet end socket is connected with the wire outlet end socket through the A, B, C and N phase cable copper buses, and the wire outlet end socket is connected with the wire outlet end socket. One ends of the A, B, C and N phase cable bus bars are respectively connected with corresponding phase cable joints, and the other ends are respectively connected with corresponding phase cable copper buses; the energy storage cabinet body is provided with a bus connector, the first end of the bus connector is used for connecting a wire inlet end socket of one energy storage cabinet, and the second end of the bus connector is used for connecting a wire outlet end socket of the other energy storage cabinet. When a plurality of energy storage cabinets are connected in parallel for use, the connection of the busbars between two adjacent energy storage cabinets can be realized only through the busbar connector, so that the construction is simple, the efficiency is improved, and the use amount of cables is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to an electric energy storage cabinet, a junction cabinet and an electric energy storage system. Background Art

[0002] In recent years, the energy storage market has grown rapidly, with new installed capacity reaching approximately 23.22GW / 51.13GWh; the source-grid side still occupies a major position in the energy storage market, with new installed capacity on the source-grid side accounting for 90% according to installed power statistics; energy storage applications on the user side are mainly industrial and commercial energy storage, with new installed capacity (GW) accounting for 10%, of which 99% is industrial and commercial energy storage.

[0003] For industrial and commercial users connected to the 400V grid, the current mainstream industrial and commercial energy storage cabinet capacities are 50kW / 100kWh, 100kW / 200kWhH and 125kW / 261kWh.

[0004] In the existing energy storage cabinet expansion method, when user demand is large, multiple energy storage cabinets are connected in parallel to achieve capacity expansion. Usually, each energy storage cabinet needs to be connected to the junction cabinet through a cable. Taking 10 energy storage cabinets as an example, the 10 junction cabinets need to be connected to each incoming line socket of the junction cabinet through a four-core AC cable. The construction is highly complex and the cable consumption is large.

[0005] To this end, the present application provides an electric energy storage cabinet, a junction cabinet and an electric energy storage system to solve any of the above-mentioned technical problems. Summary of the invention

[0006] The object of the present invention is to provide an electric energy storage cabinet, a combiner cabinet and an electric energy storage system, so as to solve any of the technical problems mentioned above.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: In a first aspect, an electric energy storage cabinet includes an energy storage cabinet body, wherein the energy storage cabinet body includes a liquid cooling unit chamber, a battery system chamber and an energy storage converter, wherein the energy storage converter includes A, B, C, and N phase cable connectors, an AC bus chamber is provided on the top of the energy storage cabinet body, and an inlet socket and an outlet socket are symmetrically provided on both side walls of the AC bus chamber; The AC busbar room is equipped with copper busbars for A, B, C, and N phase cables; The incoming socket is connected to the outgoing socket through the copper busbars of the A, B, C, and N phase cables; The energy storage cabinet body is provided with A, B, C, and N phase cable busbars, one end of which is connected to the corresponding phase cable connector, and the other end is connected to the corresponding phase cable copper busbar; The energy storage cabinet body is equipped with a busbar connector, a first end of the busbar connector is used to connect to the incoming line socket of one energy storage cabinet, and a second end of the busbar connector is used to connect to the outgoing line socket of another energy storage cabinet.

[0008] Further, the A, B, C, and N phase cable copper busbars include an A phase cable copper busbar, a B phase cable copper busbar, a C phase cable copper busbar, and an N phase cable copper busbar; The incoming socket is connected to the outgoing socket through the copper busbar of the A-phase cable, the copper busbar of the B-phase cable, the copper busbar of the C-phase cable and the copper busbar of the N-phase cable; The A, B, C, and N phase cable busbars include the A phase cable busbar, the B phase cable busbar, the C phase cable busbar, and the N phase cable busbar; The A, B, C, and N phase cable connectors include an A phase cable connector, a B phase cable connector, a C phase cable connector, and an N phase cable connector; The first end of the A-phase cable busbar is connected to the A-phase cable connector, and the second end of the A-phase cable busbar is connected to the A-phase cable copper busbar; A first end of the B-phase cable busbar is connected to a B-phase cable connector, and a second end of the B-phase cable busbar is connected to a B-phase cable copper busbar; The first end of the C-phase cable busbar is connected to the C-phase cable connector, and the second end of the C-phase cable busbar is connected to the A-phase cable copper busbar; A first end of the N-phase cable busbar is connected to an N-phase cable connector, and a second end of the N-phase cable busbar is connected to an N-phase cable copper busbar.

[0009] Furthermore, the incoming line socket includes an A-phase cable metal column, a B-phase cable metal column, a C-phase cable metal column and an N-phase cable metal column, and the outgoing line socket has the same structure as the incoming line socket; The A-phase cable metal column of the incoming socket is connected to the A-phase cable metal column of the outgoing socket through the A-phase cable copper busbar; The B-phase cable metal column of the incoming socket is connected to the B-phase cable metal column of the outgoing socket through the B-phase cable copper busbar; The C-phase cable metal column of the incoming socket is connected to the C-phase cable metal column of the outgoing socket through the C-phase cable copper busbar; The N-phase cable metal column of the incoming socket is connected to the N-phase cable metal column of the outgoing socket through the N-phase cable copper busbar; The A-phase cable metal column of the incoming socket and the A-phase cable copper busbar, the A-phase cable copper busbar and the A-phase cable metal column of the outgoing socket, the B-phase cable metal column of the incoming socket and the B-phase cable copper busbar, the B-phase cable copper busbar and the B-phase cable metal column of the outgoing socket, the C-phase cable metal column of the incoming socket and the C-phase cable copper busbar, the C-phase cable copper busbar and the C-phase cable metal column of the outgoing socket, the N-phase cable metal column of the incoming socket and the N-phase cable copper busbar, and the N-phase cable copper busbar and the N-phase cable metal column of the outgoing socket are all connected by bolts.

[0010] Furthermore, both ends of the busbar connector are provided with an A-phase metal socket, a B-phase metal socket, a C-phase metal socket and an N-phase metal socket, and the A-phase metal sockets at both ends, the B-phase metal sockets at both ends, the C-phase metal sockets at both ends, and the N-phase metal sockets at both ends are all connected by copper bars; The A-phase metal jack is used to plug and match with the A-phase cable metal column; The B-phase metal jack is used for plugging and matching with the metal column of the B-phase cable; The C-phase metal jack is used to mate with the C-phase cable metal post; The N-phase metal jack is used for plugging and mating with the N-phase cable metal post.

[0011] Furthermore, the A-phase metal socket, the B-phase metal socket, the C-phase metal socket and the N-phase metal socket all adopt a plum blossom contact finger structure.

[0012] Further, the liquid cooling unit room is installed at the bottom of the energy storage cabinet; The battery system room is installed in the middle of the energy storage cabinet and located at the upper end of the liquid cooling unit room; The energy storage converter is installed on the upper part of the energy storage cabinet and is located between the AC busbar room and the battery system room.

[0013] Furthermore, the energy storage cabinet body adopts an energy storage cabinet with model number DGSD-EES-00K-LD.

[0014] In the second aspect, an electric power junction box comprises a junction box body, the junction box body comprises a junction terminal block, the junction terminal block comprises an A-phase terminal, a B-phase terminal, a C-phase terminal and an N-phase terminal, an incoming line socket for plugging in a busbar connector is provided on the side wall of the junction box body, the A-phase of the incoming line socket is connected to the A-phase terminal, the B-phase of the incoming line socket is connected to the B-phase terminal, the C-phase of the incoming line socket is connected to the C-phase terminal, and the N-phase of the incoming line socket is connected to the N-phase terminal.

[0015] Furthermore, the combiner cabinet body adopts a combiner cabinet of model GGD.

[0016] In a third aspect, an electric energy storage system comprises a plurality of energy storage cabinets as described in the above aspects and a combiner cabinet as described in the above aspects; The plurality of energy storage cabinets are connected in sequence from one side through a busbar connector, and then connected to the combiner cabinet through the busbar connector.

[0017] The beneficial effects of the present invention are as follows: an AC busbar chamber is added on the top of a traditional energy storage cabinet, one end of the AC busbar chamber is provided with an incoming line socket, and the other end is provided with an outgoing line socket. When multiple energy storage cabinets are used in parallel, the busbars between two adjacent energy storage cabinets can be connected only through a busbar connector. Each energy storage cabinet does not need to be connected to each incoming line socket of the junction cabinet through a four-core AC cable. The construction is simple, the on-site construction efficiency is improved, and the amount of cables used is greatly saved.

[0018] These and other objects, features and advantages of the present invention will be fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the use status of the electric energy storage system of the present invention is shown.

[0020] Figure markings: 1-liquid cooling unit room, 2-battery system room, 3-energy storage inverter, 4-incoming line socket, 51-A phase cable copper busbar, 52-B phase cable copper busbar, 53-C phase cable copper busbar, 54-N phase cable copper busbar, 61-A phase cable busbar, 62-B phase cable busbar, 63-C phase cable busbar, 64-N phase cable busbar, 7-busbar connector, 8-AC busbar room, 9-outgoing line socket. DETAILED DESCRIPTION

[0021] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0022] It should be understood by those skilled in the art that, in the disclosure of the specification, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. Therefore, the above terms should not be understood as limiting the present invention.

[0023] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0024] refer to Figure 1 An electric energy storage cabinet according to a preferred embodiment of the present invention will be described in detail below, wherein the electric energy storage cabinet includes an energy storage cabinet body, the energy storage cabinet body includes a liquid cooling unit chamber 1, a battery system chamber 2 and an energy storage converter 3, the energy storage converter 3 includes A, B, C, N phase cable connectors, an AC bus chamber 8 is provided on the top of the energy storage cabinet body, and an input terminal socket 4 and an output terminal socket 9 are symmetrically provided on both side walls of the AC bus chamber 8.

[0025] A, B, C, N phase cable copper busbars are arranged in the AC busbar chamber 8, and the incoming line socket 4 is connected to the outgoing line socket 9 through the A, B, C, N phase cable copper busbars.

[0026] The energy storage cabinet body is provided with A, B, C, N phase cable busbars, one end of which is respectively connected to the corresponding phase cable connector, and the other end is respectively connected to the corresponding phase cable copper busbar.

[0027] The energy storage cabinet body is provided with a busbar connector 7, a first end of the busbar connector 7 is used to connect to an incoming line socket 4 of an energy storage cabinet, and a second end of the busbar connector 7 is used to connect to an outgoing line socket 9 of another energy storage cabinet.

[0028] An AC busbar room is added on the top of the traditional energy storage cabinet. One end of the AC busbar room is provided with an incoming socket, and the other end is provided with an outgoing socket. When multiple energy storage cabinets are used in parallel, the busbars between two adjacent energy storage cabinets can be connected only through a busbar connector. Each energy storage cabinet does not need to be connected to each incoming socket of the junction cabinet through a four-core AC cable. The construction is simple, the on-site construction efficiency is improved, and the cable usage is greatly saved.

[0029] When in use, the outlet socket 9 of the first energy storage cabinet is connected to the inlet socket 4 of the second energy storage cabinet through a busbar connector 7; The outlet socket 9 of the second energy storage cabinet is connected to the inlet socket 4 of the third energy storage cabinet via a busbar connector 7; ...... The outlet socket 9 of the last energy storage cabinet is connected to the inlet socket of the combiner cabinet through a busbar connector 7 .

[0030] Exemplarily, the energy storage cabinet body includes a liquid cooling unit chamber 1, a battery system chamber 2 and an energy storage inverter 3, the energy storage inverter 3 includes an A-phase cable connector, a B-phase cable connector, a C-phase cable connector and an N-phase cable connector, an AC busbar chamber 8 is provided on the top of the energy storage cabinet body, an incoming line socket 4 is provided on one side wall of the AC busbar chamber 8, and an outgoing line socket 9 is provided on the other side wall, and the incoming line socket 4 and the outgoing line socket 9 are symmetrical to each other.

[0031] The incoming line socket 4 comprises an A-phase cable metal column, a B-phase cable metal column, a C-phase cable metal column and an N-phase cable metal column, and the outgoing line socket 9 has the same structure as the incoming line socket 4 .

[0032] An A-phase cable copper busbar 51 , a B-phase cable copper busbar 52 , a C-phase cable copper busbar 53 and an N-phase cable copper busbar 54 are arranged in the AC busbar chamber 8 .

[0033] The A-phase cable metal column of the incoming socket 4 is connected to the A-phase cable metal column of the outgoing socket 9 via the A-phase cable copper busbar 51 .

[0034] The B-phase cable metal column of the incoming socket 4 is connected to the B-phase cable metal column of the outgoing socket 9 via the B-phase cable copper busbar 52 .

[0035] The C-phase cable metal column of the incoming terminal socket 4 is connected to the C-phase cable metal column of the outgoing terminal socket 9 via the C-phase cable copper busbar 53 .

[0036] The N-phase cable metal column of the incoming terminal socket 4 is connected to the N-phase cable metal column of the outgoing terminal socket 9 through the N-phase cable copper busbar 54 .

[0037] The energy storage cabinet body is provided with an A-phase cable bus bar 61 , a B-phase cable bus bar 62 , a C-phase cable bus bar 63 and an N-phase cable bus bar 64 .

[0038] A first end of the A-phase cable busbar 61 is connected to the A-phase cable connector, and a second end of the A-phase cable busbar 61 is connected to the A-phase cable copper busbar 51 .

[0039] A first end of the B-phase cable busbar 62 is connected to the B-phase cable connector, and a second end of the B-phase cable busbar 62 is connected to the B-phase cable copper busbar 52 .

[0040] A first end of the C-phase cable busbar 63 is connected to the C-phase cable connector, and a second end of the C-phase cable busbar 63 is connected to the C-phase cable copper busbar 53 .

[0041] A first end of the N-phase cable busbar 64 is connected to the N-phase cable connector, and a second end of the N-phase cable busbar 64 is connected to the N-phase cable copper busbar 54 .

[0042] The energy storage cabinet body is provided with a busbar connector 7, a first end of the busbar connector 7 is used to connect to an incoming line socket 4 of an energy storage cabinet, and a second end of the busbar connector 7 is used to connect to an outgoing line socket 9 of another energy storage cabinet.

[0043] An AC busbar chamber 8 is added to the top of the traditional energy storage cabinet. One end of the AC busbar chamber 8 is provided with an incoming line socket 4, and the other end is provided with an outgoing line socket 9. When multiple energy storage cabinets are used in parallel, the busbars between two adjacent energy storage cabinets can be connected only through the busbar connector 7. Each energy storage cabinet does not need to be connected to each incoming line socket of the junction cabinet through a four-core AC cable, which simplifies the construction, improves the on-site construction efficiency, and greatly saves the amount of cables.

[0044] Exemplarily, the A-phase cable metal column of the incoming socket 4 and the A-phase cable copper busbar 51, the A-phase cable copper busbar 51 and the A-phase cable metal column of the outgoing socket 9, the B-phase cable metal column of the incoming socket 4 and the B-phase cable copper busbar 52, the B-phase cable copper busbar 52 and the B-phase cable metal column of the outgoing socket 9, the C-phase cable metal column of the incoming socket 4 and the C-phase cable copper busbar 53, the C-phase cable copper busbar 53 and the C-phase cable metal column of the outgoing socket 9, the N-phase cable metal column of the incoming socket 4 and the N-phase cable copper busbar 54, and the N-phase cable copper busbar 54 and the N-phase cable metal column of the outgoing socket 9 are all connected by bolts.

[0045] Exemplarily, both ends of the busbar connector 7 are provided with an A-phase metal socket, a B-phase metal socket, a C-phase metal socket and an N-phase metal socket, and the A-phase metal sockets at both ends, the B-phase metal sockets at both ends, the C-phase metal sockets at both ends, and the N-phase metal sockets at both ends are all connected by copper busbars.

[0046] The A-phase metal jack is used to plug and match with the metal column of the A-phase cable; the B-phase metal jack is used to plug and match with the metal column of the B-phase cable; the C-phase metal jack is used to plug and match with the metal column of the C-phase cable; the N-phase metal jack is used to plug and match with the metal column of the N-phase cable.

[0047] In this embodiment, the A-phase metal socket, the B-phase metal socket, the C-phase metal socket and the N-phase metal socket all adopt a plum blossom contact finger structure.

[0048] The liquid cooling unit chamber 1 is installed at the bottom of the energy storage cabinet; the battery system chamber 2 is installed in the middle of the energy storage cabinet and located at the upper end of the liquid cooling unit chamber 1; the energy storage inverter 3 is installed at the upper part of the energy storage cabinet and located between the AC bus chamber 8 and the battery system chamber 2.

[0049] In this embodiment, the energy storage cabinet body adopts an energy storage cabinet with model number DGSD-EES-100K-232L-D.

[0050] The present invention also provides a power junction box, including a junction box body, the junction box body including a junction terminal row, the junction terminal row including an A-phase terminal, a B-phase terminal, a C-phase terminal and an N-phase terminal, and a side wall of the junction box body is provided with an inlet socket for plugging in a busbar connector 7, the A-phase of the inlet socket is connected to the A-phase terminal, the B-phase of the inlet socket is connected to the B-phase terminal, the C-phase of the inlet socket is connected to the C-phase terminal, and the N-phase of the inlet socket is connected to the N-phase terminal. In this embodiment, the junction box body adopts a junction box of model GGD.

[0051] The present invention also provides an electric energy storage system, the system comprising a plurality of energy storage cabinets as described in the above embodiments and a combiner cabinet as described in the above embodiments; The energy storage cabinets are connected in sequence from one side through the busbar connector 7, and then connected to the combiner cabinet through the busbar connector 7; Specifically, the outlet socket 9 of the first energy storage cabinet is connected to the inlet socket 4 of the second energy storage cabinet through a busbar connector 7; The outlet socket 9 of the second energy storage cabinet is connected to the inlet socket 4 of the third energy storage cabinet via a busbar connector 7; ...... The outlet socket 9 of the last energy storage cabinet is connected to the inlet socket of the combiner cabinet through a busbar connector 7 .

[0052] It should be noted that the terms "first" and "second" in the present invention are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0053] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

[0054] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0055] Similarly, it should be understood that in order to simplify the present disclosure and help understand one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. More specifically, inventive aspects lie in less than all the features of a single embodiment disclosed above.

[0056] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition they can be divided into multiple submodules or subunits or subassemblies. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification and all processes or units of any method or device disclosed in this manner can be combined in any combination. Unless otherwise clearly stated, each feature disclosed in this specification can be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0057] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, any one of the claimed embodiments may be used in any combination.

Claims

1. An electric energy storage cabinet, comprising an energy storage cabinet body, wherein the energy storage cabinet body comprises a liquid cooling unit chamber (1), a battery system chamber (2) and an energy storage converter (3), wherein the energy storage converter (3) comprises A, B, C, and N phase cable connectors, characterized in that: An AC busbar chamber (8) is provided on the top of the energy storage cabinet body, and an inlet socket (4) and an outlet socket (9) are symmetrically provided on two side walls of the AC busbar chamber (8); The AC busbar room (8) is equipped with copper busbars for A, B, C, and N phase cables; The incoming socket (4) is connected to the outgoing socket (9) via copper busbars of A, B, C, and N phase cables; The energy storage cabinet body is provided with A, B, C, and N phase cable busbars, one end of which is connected to the corresponding phase cable connector, and the other end is connected to the corresponding phase cable copper busbar; The energy storage cabinet body is provided with a busbar connector (7), a first end of the busbar connector (7) being used to connect to an incoming line socket (4) of one energy storage cabinet, and a second end of the busbar connector (7) being used to connect to an outgoing line socket (9) of another energy storage cabinet.

2. The energy storage cabinet according to claim 1, characterized in that: The A, B, C, and N phase cable copper busbars include an A phase cable copper busbar (51), a B phase cable copper busbar (52), a C phase cable copper busbar (53), and an N phase cable copper busbar (54); The incoming line socket (4) is connected to the outgoing line socket (9) via the A-phase cable copper busbar (51), the B-phase cable copper busbar (52), the C-phase cable copper busbar (53) and the N-phase cable copper busbar (54); The A, B, C, and N phase cable busbars include an A phase cable busbar (61), a B phase cable busbar (62), a C phase cable busbar (63), and an N phase cable busbar (64); The A, B, C, and N phase cable connectors include an A phase cable connector, a B phase cable connector, a C phase cable connector, and an N phase cable connector; A first end of the A-phase cable busbar (61) is connected to an A-phase cable connector, and a second end of the A-phase cable busbar (61) is connected to an A-phase cable copper busbar (51); A first end of the B-phase cable busbar (62) is connected to a B-phase cable connector, and a second end of the B-phase cable busbar (62) is connected to a B-phase cable copper busbar (52); A first end of the C-phase cable busbar (63) is connected to a C-phase cable connector, and a second end of the C-phase cable busbar (63) is connected to an A-phase cable copper busbar (53); A first end of the N-phase cable busbar (64) is connected to an N-phase cable connector, and a second end of the N-phase cable busbar (64) is connected to an N-phase cable copper busbar (54).

3. The energy storage cabinet according to claim 2, characterized in that: The incoming line socket (4) comprises an A-phase cable metal column, a B-phase cable metal column, a C-phase cable metal column and an N-phase cable metal column, and the outgoing line socket (9) has the same structure as the incoming line socket (4); The A-phase cable metal column of the incoming socket (4) is connected to the A-phase cable metal column of the outgoing socket (9) via the A-phase cable copper busbar (51); The B-phase cable metal column of the incoming terminal socket (4) is connected to the B-phase cable metal column of the outgoing terminal socket (9) via the B-phase cable copper busbar (52); The C-phase cable metal column of the incoming socket (4) is connected to the C-phase cable metal column of the outgoing socket (9) via the C-phase cable copper busbar (53); The N-phase cable metal column of the incoming socket (4) is connected to the N-phase cable metal column of the outgoing socket (9) via the N-phase cable copper busbar (54); The A-phase cable metal column of the incoming socket (4) and the A-phase cable copper busbar (51), the A-phase cable copper busbar (51) and the A-phase cable metal column of the outgoing socket (9), the B-phase cable metal column of the incoming socket (4) and the B-phase cable copper busbar (52), the B-phase cable copper busbar (52) and the B-phase cable metal column of the outgoing socket (9), the C-phase cable metal column of the incoming socket (4) and the C-phase cable copper busbar (53), the C-phase cable copper busbar (53) and the C-phase cable metal column of the outgoing socket (9), the N-phase cable metal column of the incoming socket (4) and the N-phase cable copper busbar (54), and the N-phase cable copper busbar (54) and the N-phase cable metal column of the outgoing socket (9) are all connected by bolts.

4. The energy storage cabinet according to claim 3, characterized in that: Both ends of the busbar connector (7) are provided with an A-phase metal socket, a B-phase metal socket, a C-phase metal socket and an N-phase metal socket, and the A-phase metal sockets at both ends, the B-phase metal sockets at both ends, the C-phase metal sockets at both ends, and the N-phase metal sockets at both ends are connected by copper bars; The A-phase metal jack is used to plug and match with the A-phase cable metal column; The B-phase metal jack is used for plugging and matching with the metal column of the B-phase cable; The C-phase metal jack is used to mate with the C-phase cable metal post; The N-phase metal jack is used for plugging and mating with the N-phase cable metal post.

5. The energy storage cabinet according to claim 4, characterized in that: The A-phase metal jack, the B-phase metal jack, the C-phase metal jack and the N-phase metal jack all adopt a plum blossom contact finger structure.

6. The energy storage cabinet according to claim 5, characterized in that: The liquid cooling unit room (1) is installed at the bottom of the energy storage cabinet; The battery system room (2) is installed in the middle of the energy storage cabinet and is located at the upper end of the liquid cooling unit room (1); The energy storage converter (3) is installed on the upper part of the energy storage cabinet and is located between the AC busbar chamber (8) and the battery system chamber (2).

7. The energy storage cabinet according to claim 6, characterized in that: The energy storage cabinet body adopts an energy storage cabinet with model DGSD-EES-100K-232L-D.

8. A power combiner cabinet, comprising a combiner cabinet body, the combiner cabinet body comprising a combiner terminal block, the combiner terminal block comprising an A-phase terminal, a B-phase terminal, a C-phase terminal and an N-phase terminal, characterized in that: The side wall of the combiner cabinet body is provided with an incoming line socket for plugging in the busbar connector (7), the A phase of the incoming line socket is connected to the A phase terminal, the B phase of the incoming line socket is connected to the B phase terminal, the C phase of the incoming line socket is connected to the C phase terminal, and the N phase of the incoming line socket is connected to the N phase terminal.

9. The combiner cabinet according to claim 8, characterized in that: The combiner cabinet body adopts a combiner cabinet of model GGD.

10. An electric energy storage system, characterized in that: The system comprises a plurality of energy storage cabinets as described in any one of claims 1 to 7 and a combiner cabinet as described in any one of claims 8 to 9; The plurality of energy storage cabinets are connected in sequence from one side via a busbar connector (7), and then connected to the combiner cabinet via the busbar connector (7).

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