Conductive red copper bar for combined energy storage cabinet

Abstract

A conductive red copper bar for a combined energy storage cabinet comprises a base. The plurality of single battery boxes can be stacked up and down and are used for storing battery cells, and the lowest single battery box is stacked on the base; the inverter box body is stacked on the single battery box at the uppermost part; the top box is stacked on the inverter box body, and a circuit breaker protector is arranged in the top box; and the conductive red copper bar assembly comprises a plurality of battery box red copper bar assemblies, and the circuit breaker protector is connected with the red copper bar assemblies. According to the energy storage cabinet, the base, the plurality of single battery boxes, the inverter box body and the top box are sequentially stacked from bottom to top and are assembled, and an assembly structure in the horizontal direction is not provided, so that the single occupied space of the energy storage cabinet can be greatly reduced. A plurality of single battery boxes can be assembled, disassembled and combined with one another, the number of the single battery boxes can be customized according to actual requirements of a user, the number of the single battery boxes can be automatically increased or decreased in the later period, and the modular design of the energy storage cabinet is truly achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of spare parts of energy storage cabinets, in particular to a conductive copper bar for a combined energy storage cabinet. Background Technique

[0002] An energy storage cabinet is a device used for storing and managing electric energy, usually composed of a battery pack, a monitoring system and a control system. It can store energy (such as electricity, solar energy or wind energy) and release it for use when needed. The advantages of energy storage cabinets include improving energy utilization efficiency, reducing energy costs, reducing dependence on traditional thermal power, and supporting green and sustainable development.

[0003] A combined energy storage cabinet is a system integrating multiple energy storage technologies and devices, usually used for electric energy storage and management. It can combine multiple energy storage units (such as lithium batteries, lead-acid batteries, supercapacitors, etc.) to achieve higher efficiency and flexibility. The following are some characteristics and applications of combined energy storage cabinets: 1. Modular design: Combined energy storage cabinets usually adopt a modular design, and energy storage units can be added or reduced according to needs, which is convenient for expansion. 2. High efficiency: Combining the advantages of different energy storage technologies, it can provide better energy output and charge-discharge efficiency in different application scenarios. 3. Intelligent management system: Usually equipped with an intelligent management system, which can monitor the energy storage status in real time.

[0004] There are several monomer battery boxes that can be assembled with each other in a combined energy storage cabinet. In order to realize the circuit connection in each combined energy storage cabinet, a special circuit connection structure is required.

[0005] Example of the prior art. Referring to the patent document CN220652231U, a energy storage cabinet is disclosed, which relates to the technical field of battery storage. The energy storage cabinet includes a cabinet body, a battery unit and a cooling unit. The cabinet body has a first placement cavity, a second placement cavity and a first partition board. The first placement cavity and the second placement cavity are separated by the first partition board. The battery unit is arranged in the first placement cavity. The cooling unit is arranged on one side of the battery unit and is arranged in the second placement cavity. The cooling unit is connected to the battery unit and is used for dissipating heat from the battery unit. Among them, a heat preservation member is arranged on the inner wall of the first placement cavity, and the heat preservation member is used to prevent the temperature outside the first placement cavity from affecting the battery unit. The above technical example represents the most common energy storage cabinet solution on the market at present, and it has certain defects. For example: 1. Although there are multiple battery units, the overall shape, size and internal structure of the cabinet body cannot be changed. Therefore, the actual maximum capacitance of the energy storage cabinet is fixed at the time of factory, and it cannot meet the requirements of the modular design of the energy storage cabinet. 2. It can be seen that the battery units are connected by flexible cables that can be bent. In this case, their states are unstable, and generally hard rear protection plates are required for shielding protection to prevent phenomena such as loosening, which may lead to defects such as short circuits or open circuits in the circuit. 3. It is not convenient to disassemble and assemble. Summary of the Invention

[0006] In order to overcome the above deficiencies of the prior art, the present utility model provides a conductive copper bar for a combined energy storage cabinet.

[0007] The technical solution adopted by the present utility model to solve its technical problems is: A conductive copper bar for a combined energy storage cabinet, which includes the following components arranged from bottom to top in sequence:

[0008] Base;

[0009] A plurality of single battery boxes that can be stacked on top of each other for storing battery cores, and the lowermost single battery box is stacked on the base;

[0010] Inverter box body, which is stacked on the uppermost single battery box;

[0011] Top box, which is stacked on the inverter box body, and a circuit breaker is provided in the top box;

[0012] It further includes:

[0013] Conductive copper bar assembly, which includes a plurality of battery box copper bar assemblies and a circuit breaker connection copper bar assembly;

[0014] The described copper bar assembly of the battery box includes several vertical single copper sheets and L-shaped single copper sheets; on each of the single battery boxes and the inverter box body, quick-connect electrical connectors are provided, and the vertical single copper sheets are connected in series between the quick-connect electrical connectors on adjacent single battery boxes or the inverter box body; several first connection terminals are provided in the top box, and the L-shaped single copper sheets are connected between the first connection terminals and the quick-connect electrical connectors on the inverter box body;

[0015] The described circuit breaker protector connecting copper bar assembly includes a horizontal section copper sheet, a vertical section copper sheet, and a torsion section copper sheet; several second connection terminals are provided in the top box, the horizontal section copper sheet is connected between the second connection terminals and the torsion section copper sheet, and the vertical section copper sheet is connected between the circuit breaker protector and the torsion section copper sheet.

[0016] Preferably, each single battery box is configured with 2 quick-connect electrical connectors, and the 2 quick-connect electrical connectors are symmetrically distributed left and right.

[0017] In some embodiments of the present invention, a direct high-voltage contactor at the end of the battery cell is further provided in the single battery box, the conductive copper bar assembly further includes a Z-shaped single copper sheet, and the Z-shaped single copper sheet is connected between the direct high-voltage contactor at the end of the battery cell and the quick-connect electrical connector.

[0018] Preferably, a cooling fan is further provided in the single battery box, and the cooling fan is arranged facing the Z-shaped single copper sheet.

[0019] In some preferred embodiments, at least part of the copper bar assembly of the battery box is exposed outside the single battery box, and both the vertical single copper sheet and the L-shaped single copper sheet are coated with double-layer insulating rubber.

[0020] In some embodiments of the present invention, insertion block portions are convexly provided at both ends of the torsion section copper sheet, slots are provided at the ends of the horizontal section copper sheet and the vertical section copper sheet close to the torsion section copper sheet, and the insertion block portions are inserted into the slots.

[0021] Furthermore, the quick-connect electrical connector has an upper connection hole and a lower connection hole. The vertical single copper sheet located below the quick-connect electrical connector is inserted into the lower connection hole from bottom to top, and the vertical single copper sheet located above the quick-connect electrical connector is inserted into the upper connection hole from top to bottom. And the two vertical single copper sheets inserted in the same quick-connect electrical connector have an overlapping section, and fastening holes are provided in the overlapping section, and first fasteners can be inserted into the fastening holes to connect the two vertical single copper sheets together.

[0022] More specifically, first fixing holes are formed in both the first terminal and the second terminal, and second fixing holes are formed in both the L-shaped single-piece copper sheet and the horizontal-section copper sheet. The first fixing holes and the second fixing holes can respectively receive second fasteners to connect the first terminal with the L-shaped single-piece copper sheet and connect the second fixing holes with the horizontal-section copper sheet respectively.

[0023] In some embodiments of the present utility model, a handle is provided on one side of the single-cell battery box close to the copper busbar assembly of the battery box; a box door is provided on the side of the single-cell battery box far from the copper busbar assembly of the battery box. A switch lock is provided on the box door, and a communication connector is further provided on the box door.

[0024] In some embodiments of the present utility model, a panel is provided on the side wall of the top box. The panel has an opening groove, and the opening groove faces the toggle switch on the circuit breaker protector. A panel cover is hinged on the panel, and the panel cover can cover or release the opening groove.

[0025] The beneficial effects of the present utility model are as follows:

[0026] First, the base, multiple single-cell battery boxes, the inverter box body, and the top box are stacked and assembled in sequence from bottom to top, without a horizontal assembly structure. Therefore, the single-unit floor space of the energy storage cabinet can be greatly reduced.

[0027] Second, multiple single-cell battery boxes can be disassembled and assembled with each other. The number of single-cell battery boxes can be customized according to the actual needs of users, and the number of single-cell battery boxes can be increased or decreased by the user himself in the later stage, realizing a truly modular design of the energy storage cabinet.

[0028] Third, a special conductive copper busbar assembly is adopted. The conductive copper busbar assembly is entirely composed of hard and structurally stable copper sheets, having very good electrical conductivity, low resistivity, which can effectively reduce energy loss, and relatively high mechanical strength, with good tensile strength and compressive strength, which can ensure the stable connection and use of the circuit structure, thereby improving the overall safety and reliability of the energy storage cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural view of the rear side of the present utility model and a partial enlarged view thereof.

[0030] Figure 2 is a schematic structural view of the front side of the present utility model.

[0031] Figure 3 is a disassembly and assembly schematic view of the present utility model.

[0032] Figure 4 is a schematic structural view inside the panel.

[0033] Figure 5 It is a schematic diagram of the internal wiring structure of the set-top box.

[0034] Figure 6 It is a schematic diagram of the structure of the circuit breaker protector connected to the copper busbar assembly.

[0035] Figure 7 It is a cross-sectional view of the internal structure of the single battery box.

[0036] Figure 8 It is a schematic diagram of the structure of the vertical single copper sheet with double-layer insulating rubber.

[0037] Figure 9 It is a disassembled schematic diagram of the quick-insert electrical connector and two adjacent vertical single copper sheets.

[0038] In the figure: 1. Base; 2. Single battery box; 21. Battery core; 22. Quick-insert electrical connector; 221. Upper connection hole; 222. Lower connection hole; 23. High-voltage direct contactor at the end of the battery core; 24. Cooling fan; 25. Handle; 26. Box door; 261. Switch lock; 262. Communication connector; 3. Inverter box body; 4. Set-top box; 41. First terminal; 411. First fixing hole; 42. Second terminal; 43. Panel; 431. Opening slot; 432. Panel cover; 5. Circuit breaker protector; 51. Toggle switch; 6. Conductive copper busbar assembly; 61. Copper busbar assembly of the battery box; 611. Vertical single copper sheet; 6111. Overlapping section; 6111a. Fastening hole; 612. L-shaped single copper sheet; 6121. Second fixing hole; 62. Double-layer insulating rubber; 62. Circuit breaker protector connected copper busbar assembly; 621. Horizontal section copper sheet; 6211. Slot; 622. Vertical section copper sheet; 623. Twisted section copper sheet; 6231. Insert block part; 63. Z-shaped single copper sheet. Detailed implementation manners

[0039] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific elaborations of the present utility model, and their purpose is to enable those skilled in the art to better understand the technical solutions of the present utility model, and should not be regarded as a limitation to the present utility model.

[0040] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] Embodiment 1

[0043] Refer to Figures 1 to 9 , a conductive copper bar for a combined energy storage cabinet, which includes the following components arranged in sequence from bottom to top: a base 1; a plurality of single battery boxes 2 that can be stacked on top of each other for storing battery cores 21, and the lowermost single battery box 2 is stacked on the base 1; an inverter box body 3, which is stacked on the uppermost single battery box 2; a top box 4, which is stacked on the inverter box body 3, and a circuit breaker 5 is provided in the top box 4;

[0044] Particularly different from the prior art, the present utility model further includes: a conductive copper bar assembly 6, which includes a plurality of battery box copper bar assemblies 61 and a circuit breaker 5 connection copper bar assembly; wherein, each of the battery box copper bar assemblies 61 includes a plurality of vertical single copper sheets 611 and L-shaped single copper sheets 612; quick plug connectors 22 are provided on each of the single battery boxes 2 and the inverter box body 3, and the vertical single copper sheets 611 are connected in series between the quick plug connectors 22 on adjacent single battery boxes 2 or the inverter box body 3; a plurality of first connection terminals 41 are provided in the top box 4, and the L-shaped single copper sheets 612 are connected between the first connection terminals 41 and the quick plug connectors 22 on the inverter box body 3; on the other hand, the circuit breaker 5 connection copper bar assembly includes a horizontal section copper sheet 621, a vertical section copper sheet 622, and a torsion section copper sheet 623; a plurality of second connection terminals 42 are provided in the top box 4, the horizontal section copper sheet 621 is connected between the second connection terminals 42 and the torsion section copper sheet 623, and the vertical section copper sheet 622 is connected between the circuit breaker 5 and the torsion section copper sheet 623.

[0045] The above content is the basic structural solution of the present utility model, and its unique advantages are at least as follows: First, the base 1, multiple single battery boxes 2, the inverter box 3, and the top box 4 are stacked and assembled in sequence from bottom to top, without a horizontal assembly structure, so the single floor space of the energy storage cabinet can be greatly reduced; Second, multiple single battery boxes 2 can be disassembled and assembled with each other, and the number of single battery boxes 2 can be customized according to the actual needs of users, and the number of single battery boxes 2 can also be increased or decreased by themselves in the later stage, realizing a truly modular design of the energy storage cabinet; Third, a special conductive copper bar assembly 6 is adopted. The conductive copper bar assembly 6 is entirely composed of hard and structurally stable copper sheets, with very good electrical conductivity, low resistivity, which can effectively reduce energy loss, and relatively high mechanical strength, good tensile strength and compressive strength, which can ensure the stable connection and use of the circuit structure, thereby improving the overall safety and reliability of the energy storage cabinet.

[0046] Preferably, each of the single battery boxes 2 is configured with 2 quick plug connectors 22 to respectively meet the structural connection requirements of the positive and negative circuits. Moreover, the 2 quick plug connectors 22 are symmetrically distributed left and right, which can ensure the uniform distribution of current and voltage in the entire circuit, reduce electromagnetic interference and heat loss caused by imbalance, improve the stability and reliability of the circuit; and can help the heat to be evenly distributed in the circuit, reduce the overheating phenomenon in a certain area, thereby improving the overall performance and service life of the system; on the other hand, in multi-layer circuits or integrated circuits, the symmetrical structure is easier to integrate with other components to form a compact and efficient design, and is easier to meet the requirements of the combined energy storage cabinet.

[0047] Due to the adoption of the modular design, in order to improve the disassembly and assembly efficiency of each single battery box 2, at least part of the battery box copper bar assembly 61 is exposed outside the single battery box 2; since the battery box copper bar assembly 61 is charged, in order to improve the safety protection performance and eliminate the potential safety hazard of electric leakage, both the vertical single copper sheet 611 and the L-shaped single copper sheet 612 are coated with double-layer insulating rubber 62.

[0048] Embodiment 2

[0049] Refer to Figure 7 , in some embodiments of the present utility model, a cell-end high-voltage direct contactor 23 is further provided in the single battery box 2, and the cell-end high-voltage direct contactor 23 mainly plays a role in starting, speed regulation and protection of the cells in the single battery box 2.

[0050] In order to be adapted to the cell-end high-voltage direct contactor 23, the conductive copper bar assembly 6 further includes a Z-shaped single copper sheet 63, and the Z-shaped single copper sheet 63 is connected between the cell-end high-voltage direct contactor 23 and the quick plug connector 22 to realize the extension of the circuit structure.

[0051] Since the direct high-voltage contactor 23 at the end of the battery cell is arranged inside the single battery box 2, it is easier to accumulate heat on its peripheral side. In the case of high temperature, it will easily lead to a decline in the performance of related components and even damage. Therefore, in this embodiment, a heat dissipation structure is added, specifically: a heat dissipation fan 24 is further arranged in the single battery box 2, and the heat dissipation fan 24 is arranged facing the Z-shaped single-body copper sheet 63. By arranging the heat dissipation fan 24, the internal gas flow efficiency can be increased, thereby reducing the temperature of the Z-shaped single-body copper sheet 63 to a certain extent to ensure the working performance of the Z-shaped single-body copper sheet 63.

[0052] Embodiment III

[0053] On the basis of the structure of any of the foregoing embodiments, in this embodiment, further preferred limitations are made on the local structure, specifically:

[0054] I. Referring to Figure 6 , both ends of the twisted-section copper sheet 623 are convexly provided with insertion block portions 6231, and insertion slots 6211 are opened at the ends of the horizontal-section copper sheet 621 and the vertical-section copper sheet 622 close to the twisted-section copper sheet 623. The insertion block portions 6231 are inserted into the insertion slots 6211. The plug-in method is adopted instead of the conventional welding method. First, it can realize the quick insertion and quick extraction functions between the twisted-section copper sheet 623, the horizontal-section copper sheet 621, and the vertical-section copper sheet 622. Second, it enables the copper busbar assembly connected to the circuit breaker 5 to also adopt a modular design, that is, different sizes of the twisted-section copper sheet 623, the horizontal-section copper sheet 621, and the vertical-section copper sheet 622 can be selected for mutual combination, and then different specifications of the copper busbar assembly connected to the circuit breaker 5 can be formed to meet the usage requirements in different scenarios.

[0055] II. Referring to Figure 9 , the quick-insert electrical connector 22 has an upper connection hole 221 and a lower connection hole 222. The vertical single-body copper sheet 611 located below the quick-insert electrical connector 22 is inserted into the lower connection hole 222 from bottom to top, and the vertical single-body copper sheet 611 located above the quick-insert electrical connector 22 is inserted into the upper connection hole 221 from top to bottom. And the two vertical single-body copper sheets 611 inserted in the same quick-insert electrical connector 22 have an overlapping section 6111. A fastening hole 6111a is opened in the overlapping section 6111, and a first fastener (such as a screw, not shown in the figure) can be inserted into the fastening hole 6111a to connect the two vertical single-body copper sheets 611 together to realize the combination and connection of the quick-insert electrical connector 22 with the upper and lower vertical single-body copper sheets 611.

[0056] III. Referring to Figure 5, first fixing holes 411 are formed on both the first terminal 41 and the second terminal 42, and second fixing holes 6121 are formed on both the L-shaped single-piece copper sheet 612 and the horizontal-section copper sheet 621. The first fixing holes 411 and the second fixing holes 6121 can each receive a second fastener (such as a screw, not shown in the figure) to connect the first terminal 41 to the L-shaped single-piece copper sheet 612 and connect the second fixing holes 6121 to the horizontal-section copper sheet 621 respectively, so as to realize the combination and connection of the first terminal 41 or the second terminal 42 with the L-shaped single-piece copper sheet 612 or the horizontal-section copper sheet 621.

[0057] Embodiment 4

[0058] Some other preferred functional structure solutions for the energy storage cabinet in the present utility model are as follows:

[0059] I. Referring to Figure 1 , a handle 25 is provided on one side of the single-cell battery box 2 close to the battery-box copper busbar assembly 61. By providing an acting point through the handle 25, it is convenient for users to move and carry the single-cell battery box 2 after disassembly and assembly.

[0060] II. Referring to Figure 2 , a box door 26 is provided on one side of the single-cell battery box 2 far from the battery-box copper busbar assembly 61, and a switch lock 261 is provided on the box door 26. The switch lock 261 provides an anti-theft function to prevent non-staff from opening the box door 26 to damage or steal the interior of the single-cell battery box 2.

[0061] III. Referring to Figure 2 , a communication connector 262 is further provided on the box door 26, preferably a wifi signal communication connector 262, to realize the communication between the control mechanism in the single-cell battery box 2 and an external controller (such as a mobile phone, etc.).

[0062] IV. Referring to Figure 4 , a panel 43 is provided on the side wall of the top box 4, and the panel 43 has an opening slot 431, and the opening slot 431 faces the toggle switch 51 on the circuit breaker 5. The circuit breaker 5 can be manually turned on or off through the toggle switch 51. Especially in the case of the failure of the electric control function, the toggle switch 51 can realize the emergency control function. Further, a panel cover 43 is hinged on the panel 43, and the panel cover 43 can cover or release the opening slot 431. When the panel cover 43 is closed, it can provide effective waterproof, dust-proof and other protection functions for the toggle switch 51.

[0063] It should be noted that other technical solutions of the present utility model belong to the prior art and will not be elaborated here.

[0064] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as within the protection scope of the present utility model.

Claims

1. A conductive copper bar for a combined energy storage cabinet, which is successively provided from bottom to top with: A base (1); A plurality of single battery boxes (2) that can be stacked on top of each other up and down for storing battery cores (21), and the lowermost single battery box (2) is stacked on the base (1); An inverter box body (3), which is stacked on the uppermost single battery box (2); A top box (4), which is stacked on the inverter box body (3), and a circuit breaker protector (5) is provided in the top box (4); It is characterized in that It further includes: A conductive copper bar assembly (6), which includes a plurality of battery box copper bar assemblies (61) and a copper bar assembly connected to the circuit breaker protector (5); The battery box copper bar assembly (61) includes a plurality of vertical single copper sheets (611) and L-shaped single copper sheets (612); a quick plug connector (22) is provided on each of the single battery boxes (2) and the inverter box body (3), and the vertical single copper sheets (611) are connected in series between the quick plug connectors (22) on adjacent single battery boxes (2) or the inverter box body (3); a plurality of first connection terminals (41) are provided in the top box (4), and the L-shaped single copper sheets (612) are connected between the first connection terminals (41) and the quick plug connectors (22) on the inverter box body (3); The copper bar assembly connected to the circuit breaker protector (5) includes a horizontal section copper sheet (621), a vertical section copper sheet (622), and a torsion section copper sheet (623); a plurality of second connection terminals (42) are provided in the top box (4), the horizontal section copper sheet (621) is connected between the second connection terminals (42) and the torsion section copper sheet (623), and the vertical section copper sheet (622) is connected between the circuit breaker protector (5) and the torsion section copper sheet (623).

2. The conductive copper bar for the combined energy storage cabinet according to claim 1, wherein: Each single battery box (2) is configured with 2 quick plug connectors (22), and the 2 quick plug connectors (22) are symmetrically distributed left and right.

3. The conductive copper bar for the combined energy storage cabinet according to claim 1, wherein: A cell end high-voltage direct contactor (23) is further provided in the single battery box (2), and the conductive copper bar assembly (6) further includes a Z-shaped single copper sheet (63), and the Z-shaped single copper sheet (63) is connected between the cell end high-voltage direct contactor (23) and the quick plug connector (22).

4. The conductive copper bar for the combined energy storage cabinet according to claim 3, characterized in that: A cooling fan (24) is further provided in the single battery box (2), and the cooling fan (24) is arranged opposite to the Z-shaped single copper sheet (63).

5. The conductive copper bar for the combined energy storage cabinet according to claim 1, wherein: At least part of the battery box copper bar assembly (61) is exposed outside the single battery box (2), and both the vertical single copper sheets (611) and the L-shaped single copper sheets (612) are coated with double-layer insulating rubber (62).

6. The conductive copper bar for the combined energy storage cabinet according to claim 1, characterized in that: Both ends of the copper sheet (623) in the torsion section are convexly provided with insertion block parts (6231). Slots (6211) are opened at the ends of the horizontal-section copper sheet (621) and the vertical-section copper sheet (622) close to the copper sheet (623) in the torsion section. The insertion block parts (6231) are inserted into the slots (6211).

7. The conductive copper bar for the combined energy storage cabinet according to claim 2, characterized in that: The quick-insert electrical connector (22) has an upper connection hole (221) and a lower connection hole (222). The vertical single copper sheet (611) located below the quick-insert electrical connector (22) is inserted into the lower connection hole (222) from bottom to top, and the vertical single copper sheet (611) located above the quick-insert electrical connector (22) is inserted into the upper connection hole (221) from top to bottom. And the two vertical single copper sheets (611) inserted in the same quick-insert electrical connector (22) have an overlapping section (6111). A fastening hole (6111a) is opened on the overlapping section (6111). A first fastener can be inserted into the fastening hole (6111a) to connect the two vertical single copper sheets (611) together.

8. The conductive copper bar for the combined energy storage cabinet according to claim 1, wherein: First fixing holes (411) are opened on both the first terminal (41) and the second terminal (42). Second fixing holes (6121) are opened on both the L-shaped single copper sheet (6,12) and the horizontal-section copper sheet (621). The first fixing holes (411) and the second fixing holes (6121) can respectively receive second fasteners to connect the first terminal (41) with the L-shaped single copper sheet (612) together, and connect the second fixing holes (6121) with the horizontal-section copper sheet (621) respectively.

9. The conductive copper bar for the combined energy storage cabinet according to claim 1, wherein: A handle (25) is provided on one side of the single-cell battery box (2) close to the battery-box copper busbar assembly (61); a box door (26) is provided on the side of the single-cell battery box (2) far from the battery-box copper busbar assembly (61). A switch lock (261) is provided on the box door (26), and a communication connector (262) is further provided on the box door (26).

10. The conductive copper bar for the combined energy storage cabinet according to claim 1, wherein: A panel (43) is provided on the side wall of the top box (4). The panel (43) has an opening slot (431). The opening slot (431) faces the toggle switch (51) on the circuit breaker (5). And a panel cover of the panel (43) is hinged on the panel (43). The panel cover of the panel (43) can cover or release the opening slot (431).

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