Energy storage cabinet ac-dc integrated box

Abstract

The utility model provides a kind of energy storage cabinet ac-dc integrated box, including box, irregular partition setting is integrated in the box AC distribution unit, DC distribution unit, connecting panel and heat dissipation system;Wherein, AC distribution unit, including electrically connected and sequentially arranged AC incoming line terminal table, at least one group of current transformer and AC circuit breaker;DC distribution unit, including electrically connected and sequentially arranged DC circuit breaker, DC contactor and pre-charge component;Connecting panel is set on the box side wall near the current transformer, DC circuit breaker side, and corresponding interval is provided with DC interface and AC interface;Heat dissipation system, AC distribution unit, DC distribution unit is cooled simultaneously;AC power supply enters the ac-dc integrated box through the AC power supply terminal table, after entering the AC interface conversion into DC after AC circuit breaker, AC contactor, by the DC distribution unit charges battery pack.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an integrated AC / DC energy storage cabinet. Background Technology

[0002] In traditional energy storage cabinets, the AC box (used for AC contactor control, circuit breaker protection, etc.) and the DC box (used for battery cluster connection, DC contactor control, fuse protection, etc.) are usually designed independently, leading to the following problems: 1. The discrete layout occupies a large space and has low equipment integration. 2. The complex cable connections between AC and DC systems increase losses and the risk of failure; 3. The heat dissipation system is repetitively designed, resulting in high cost and low efficiency; 4. Maintenance requires separate operation of the AC side and DC side, making the operation process cumbersome.

[0003] To address these issues, integrated AC / DC energy storage boxes have emerged in recent years. However, existing integrated AC / DC boxes simply place existing AC and DC boxes side-by-side, or install partitions within a single box to separate AC and DC zones. AC and DC power distribution components are housed in their respective zones, with connection panels on the side walls of each zone, requiring two separate cooling systems. This approach fails to solve the problem of low space utilization. Utility Model Content

[0004] To address the technical problems in the existing technology, this utility model provides an integrated AC / DC energy storage cabinet. The cabinet features irregular partitioning to fully utilize the internal space and uses only one heat dissipation system to simultaneously cool two partitions, thus achieving energy-saving effects.

[0005] To solve the above-mentioned technical problems, this utility model provides an integrated AC / DC energy storage cabinet, which adopts the following technical solution: An integrated AC / DC energy storage cabinet includes a cabinet body, which integrates an AC power distribution unit, a DC power distribution unit, a connection panel, and a heat dissipation system arranged in irregular partitions. An AC power distribution unit includes an AC incoming terminal block that is electrically connected and arranged in sequence, at least one set of current transformers, and an AC circuit breaker. A DC power distribution unit includes a DC circuit breaker, a DC contactor, and a precharge assembly that are electrically connected and arranged in sequence; The connection panel is located on the side wall of the enclosure near the current transformer and the DC circuit breaker, with DC and AC interfaces spaced at corresponding intervals. The heat dissipation system provides heat dissipation for both the AC power distribution unit and the DC power distribution unit. AC power enters the AC / DC integrated box through the AC power supply terminal block, and after passing through the AC circuit breaker and AC contactor, it enters the AC interface and is converted into DC power, which then charges the battery pack through the DC power distribution unit.

[0006] Furthermore, the AC power distribution unit also includes an integrated electricity meter and a control power supply, which are located inside the enclosure away from the connection panel.

[0007] Furthermore, a control circuit power supply circuit breaker is provided on the connection panel, and the control power supply is electrically connected to the AC power distribution unit and the DC power distribution unit respectively through the control circuit power supply circuit breaker.

[0008] Furthermore, the current transformer includes a U-phase current transformer, a V-phase current transformer, and a W-phase current transformer arranged in sequence, with the three-phase current transformers arranged in parallel and staggered.

[0009] Furthermore, the W-phase current transformer is located away from the AC incoming terminal block and close to the side wall of the enclosure, the U-phase current transformer is located away from the W-phase current transformer and close to the DC circuit breaker, and the V-phase current transformer is located between the W-phase current transformer and the U-phase current transformer.

[0010] Furthermore, a controller is also provided inside the enclosure, which is located on the DC power distribution unit side, away from the DC circuit breaker.

[0011] Furthermore, the DC interface on the connection panel includes a Pack positive plug and a Pack negative plug, and a PCS positive plug and a PCS negative plug disposed opposite to each other on the connection panel.

[0012] Furthermore, the AC interface on the connection panel includes a PCS three-phase plug disposed on the same side as the PCS negative plug and the AC input terminal block, and the PCS three-phase plug is disposed between the PCS negative plug and the AC input terminal block.

[0013] Furthermore, the connection panel is equipped with an AC circuit breaker manual control, which is located between the PCS three-phase power plug and the AC incoming terminal block, and is mechanically connected to the AC circuit breaker.

[0014] Furthermore, the connection panel is equipped with a DC circuit breaker manual control, which is located within the space enclosed by the Pack positive plug and Pack negative plug, the PCS positive plug and PCS negative plug, and is mechanically connected to the DC circuit breaker.

[0015] In summary, the AC / DC integrated energy storage cabinet provided by this utility model has the following advantages compared with the prior art: By irregularly partitioning the interior of the enclosure according to the location of AC and DC power distribution components, the internal space of the enclosure can be fully utilized, improving space utilization and thus effectively reducing the overall volume of the enclosure. By effectively arranging the components and distributing them in a cross manner according to their volume, the volume occupied by the components is further reduced, thereby further reducing the overall volume of the enclosure. With a smaller enclosure size, the entire enclosure can be cooled using a single cooling system, further saving energy and reducing energy consumption. The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the AC / DC integrated energy storage cabinet structure of this utility model; Figure 2 This is a schematic diagram of the panel connection of an AC / DC integrated energy storage cabinet according to this utility model; In the picture: 1. Connection panel; 2. U-phase current transformer; 3. V-phase current transformer; 4. W-phase current transformer; 5. AC circuit breaker; 6. Control power supply; 7. Energy meter; 8. Controller; 9. Precharge contactor; 10. Precharge resistor; 11. DC positive contactor; 12. DC fuse; 13. DC negative contactor; 14. DC circuit breaker; 15. Pack positive plug; 16. Pack negative plug; 17. DC circuit breaker manual operation; 18. PCS negative plug; 19. PCS three-phase power plug; 20. AC circuit breaker manual operation; 21. AC incoming terminal block; 22. Surge protector; 23. AC / DC box control terminals; 24. Control circuit power supply circuit breaker; 25. PCS positive plug; 26. Indicator light.

[0018] It should be noted that the accompanying drawings and text description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] This utility model provides an integrated AC / DC energy storage cabinet, comprising a cabinet body, wherein the cabinet body integrates an irregularly partitioned AC power distribution unit, a DC power distribution unit, a connection panel 1, and a heat dissipation system; wherein... An AC power distribution unit includes an AC incoming terminal block 21 electrically connected and arranged in sequence, at least one set of current transformers and an AC circuit breaker 5; The DC power distribution unit includes a DC circuit breaker 14, a DC contactor, and a pre-charge assembly that are electrically connected and arranged in sequence. The connection panel 1 is located on the side wall of the enclosure near the current transformer and the DC circuit breaker 14, and DC and AC interfaces are provided at corresponding intervals. The heat dissipation system provides heat dissipation for both the AC power distribution unit and the DC power distribution unit. AC power enters the AC / DC integrated box through the AC power supply terminal block, and after passing through the AC circuit breaker 5 and the AC contactor, it enters the AC interface and is converted into DC power, which then charges the battery pack through the DC power distribution unit.

[0023] like Figure 1As shown, the energy storage cabinet AC / DC integrated box provided in this application includes a rectangular box (not shown in the figure), and the DC power distribution unit and AC power distribution unit are reasonably arranged in the box. According to the setting position and occupied area of ​​each component, irregular partitions are made so that the AC power distribution unit and DC power distribution unit are integrated in the box at the same time.

[0024] The "irregular partitioning" mentioned in this application refers to the absence of straight-plate partitions within the enclosure, where the AC power distribution unit and the DC power distribution unit are first separated into left and right sides (e.g., ...). Figure 1 (As shown in the diagram) The components of the AC power distribution unit are arranged within the enclosure. Based on the principle of convenient and simple circuit connections for each component, the components are placed in the right-side space of the enclosure. It is not required that the components be aligned vertically on their left sides. After the AC power distribution unit is installed, partitions are placed at equal distances from or adjacent to the left sides of each component, according to their positions on the left side. These partitions are connected sequentially to form partitions. These partitions can be physical or virtual, creating irregular divisions within the enclosure. After setting the partitions, the DC power distribution unit is arranged in the remaining space on the left side of the enclosure, taking into account the width (length in the left-right direction) of the remaining space after the irregular partitioning, ensuring full utilization of space and prioritizing convenient and simple circuit connections for each component. This irregular area design, with the components of the DC and AC power distribution units distributed in an interleaved manner according to functional requirements and cable connection paths, fully utilizes the internal space of the enclosure, avoids the space waste of traditional partitioning, and effectively reduces the overall volume of the enclosure.

[0025] In practical applications, other principles can also be used to achieve irregular partitioning, such as layout and partitioning based on DC power distribution units; partitioning based on factors such as the main core components of DC and AC power distribution units, the volume, quantity, and heat dissipation requirements of the core components, so as to make full use of space and reduce the overall volume of the enclosure. The above description should not be regarded as a limitation on the "irregular partitioning" in this application.

[0026] In this embodiment, the right side of the enclosure is the AC zone, where an AC power distribution unit is installed. The components of the AC power distribution unit are arranged sequentially along the circuit flow path according to the logic of incoming lines, detection, and protection: The current transformer includes a U-phase current transformer, a V-phase current transformer 3, and a W-phase current transformer 4 arranged sequentially. The three-phase current transformers are arranged in parallel and staggered configurations, such as... Figure 1 As shown, the U-phase current transformer is positioned closer to connection panel 1, with the V-phase current transformer 3 positioned at its upper right. Above and to the upper right of the V-phase current transformer, the W-phase current transformer 4 is positioned. Specifically: The W-phase current transformer 4 is located away from the connection panel 1 and close to the right side wall of the enclosure; The U-phase current transformer 2 is located away from the W-phase current transformer 4 and close to the DC zone and the connection panel 1. The V-phase current transformer 3 is positioned between the W-phase current transformer 4 and the V-phase current transformer 3, forming a "middle misalignment" structure.

[0027] This configuration of the current transformer effectively reduces cross-interference between the three-phase cables and shortens the connection distance with the AC circuit breaker 5.

[0028] The AC circuit breaker 5 is located on the side of the U-phase current transformer 2 away from the V-phase current transformer 3 and is electrically connected to the current transformer; it is used to provide overload and short-circuit protection for the AC circuit, and its rated current can be set according to the power requirements of the energy storage cabinet, such as 250A.

[0029] The auxiliary components, including the AC power distribution unit, also integrate an ammeter and a control power supply 6. In this embodiment, the ammeter and control power supply 6 are integrated and located in a corner of the enclosure away from the connection panel 1, specifically at the rear end of the enclosure, and are separated from the W-phase current transformer 4 by an AC circuit breaker 5. The energy meter 7 is used to measure the energy data of the AC incoming line, while the control power supply 6 provides a stable power supply for the control circuit of the entire enclosure.

[0030] Furthermore, other electrical components may be installed between the U-phase current sensor and the partition plate, without any requirements or restrictions.

[0031] The left side of the enclosure is the DC zone, where the DC power distribution unit is located. This unit primarily converts AC power into DC power and transmits it to the battery pack, while also providing charging protection. The components of the DC power distribution unit are arranged as follows: DC circuit breaker 14 is installed inside the enclosure on the side near the connection panel 1, and is spaced apart from the left side wall of the enclosure. The distance between its center and the connection panel 1 is ( Figure 1 (As shown in the orientation) The distance between the center of the U-phase current transformer 2 and the connection panel 1 is close; the DC circuit breaker 14 is electrically connected to the DC contactor and is used for overload and short circuit protection of the DC circuit. Its rated voltage matches the battery pack voltage, such as DC 51.2V.

[0032] The DC contactor includes a DC positive contactor 11 and a DC negative contactor 13, which are connected in series between the DC circuit breaker 14 and the pre-charge component to control the opening and closing of the DC circuit. The DC control method is used to reduce energy consumption. It also includes a DC fuse 12 located to the left of the DC positive contactor 11 and the DC negative contactor 13 to realize circuit fuse protection. The pre-charge assembly, including a pre-charge contactor 9 and a pre-charge resistor 10 connected in parallel, is located on the side of the DC contactor away from the DC circuit breaker 14, near the rear of the enclosure. When the battery pack is initially charged or restarted, the pre-charge assembly contacts first, and then the pre-charge resistor 10 limits the initial charging current to prevent large current surges from damaging the battery. After the battery voltage stabilizes, the DC contactor is switched on to complete the normal charging switch.

[0033] Controller 8 is located at the rear of the enclosure. It controls the pre-charge contactor 9, the positive contactor, and the negative contactor.

[0034] Furthermore, on the right side of the DC circuit breaker 14, near the partition plate, an AC contactor is provided, with the end of the AC contactor furthest from the connection panel 1 positioned at intervals to the right of the DC negative contactor 13.

[0035] Furthermore, such as Figure 1 As shown, in this embodiment, the AC circuit breaker 5 has the largest volume, and the partition plate corresponding to its left side has exceeded the longitudinal center line of the enclosure. The transverse center line of the pre-charge resistor 10 is basically flush with the transverse center line of the AC circuit breaker 5. The positive and negative plugs of the battery pack are located below the left side of the DC circuit breaker 14.

[0036] In this embodiment, a connection panel 1 is provided on the front end face of the enclosure. The connection panel 1 is provided with multiple interfaces. Furthermore, the interfaces are also divided into DC interfaces and AC interfaces, which correspond to the DC area / DC power distribution unit and the AC area / AC power distribution unit inside the enclosure, respectively.

[0037] The connection panel 1 is located on the side wall of the enclosure near the current transformer and DC circuit breaker 14, i.e., at the front face of the enclosure. The panel has DC and AC interfaces corresponding to the AC and DC areas, respectively, facilitating quick connection to external components such as battery packs and PCS. The specific layout is as follows: Figure 2 As shown: AC input terminal block 21 is located at the lower right end of the connection panel 1. Figure 2 (As shown in the orientation), its input terminal is used to connect to an external three-phase AC power supply, such as 380V AC power supply. Its wiring terminal adopts an anti-loosening bolt design to ensure stability when a large current is connected. Its output terminal is connected to the AC circuit breaker 5 inside the box.

[0038] DC interface: includes Pack positive plug 15 and Pack negative plug 16, which are arranged vertically opposite each other on the left side of the connection panel 1 for connecting the battery pack. Pack positive plug 15 is electrically connected to DC positive contactor 11 via a cable, and Pack negative plug 16 is electrically connected to DC negative contactor 13 via a cable. The device includes a PCS positive plug 25 and a PCS negative plug 18, which are symmetrically arranged on the right side of the Pack plug on the connection panel 1. Their input terminals are used to connect to the PCS (energy storage converter). The output terminals of the PCS positive plug 25 and the PCS negative plug 18 are electrically connected to the output terminal of the DC circuit breaker 14 and the input terminal of the precharge component, respectively.

[0039] AC interface: including PCS three-phase plug 19, which is located between PCS negative plug 18 and AC input terminal block 21 and on the same side as both, and is used to transmit AC power output from AC circuit breaker 5 to PCS to realize the conversion of AC power to DC power.

[0040] Operating components: A DC circuit breaker manual control 17 is provided between the space enclosed by the Pack plug (including the positive plug and the negative plug) and the PCS plug (including the positive plug and the negative plug). The DC circuit breaker manual control 17 is mechanically connected to the DC circuit breaker 14, and the on and off of the DC circuit breaker 14 can be directly controlled by manual operation.

[0041] Above the manual control panel 17 of the DC circuit breaker, there are multiple indicator lights 26, which are used to indicate the status of some operating parts and / or the various parts inside the box by the color of the light. In practical applications, the purpose of each indicator light 26 can be set as needed, or the indicator lights 26 can be omitted without any requirements or restrictions.

[0042] At a position slightly above the PCS three-phase plug 19 and the AC incoming terminal block 21, there is an AC circuit breaker manual control 20, which is mechanically connected to the AC circuit breaker 5 and is used to manually control the on / off state of the AC circuit breaker 5.

[0043] Furthermore, on the left side of the manual operation 20 of the AC circuit breaker, a control circuit power supply circuit breaker 24 is installed, which is electrically connected to the control power supply 6 to realize the switching on and off of the control power supply 6.

[0044] On the right side of the manual control unit 20 of the AC circuit breaker, a surge protector 22 is installed and connected to the AC circuit breaker 5 to suppress surge impacts of AC input.

[0045] Above the manual control 20 of the AC circuit breaker, there is an AC / DC box control terminal 23, which is connected to the PACK and PCS for communication between the various components of the energy storage cabinet.

[0046] like Figure 1As shown, in this embodiment, the interior of the enclosure is divided into an AC zone and a DC zone using physical or virtual partitions to house AC and DC power distribution units respectively. A heat dissipation zone and a heat dissipation system are also provided to provide air cooling for the electrical components in both the AC and DC zones. Air cooling within the enclosure is a conventional technique in the field and is not limited or required; any existing or future heat dissipation system or method is applicable to this application.

[0047] For example, the cooling system features a top-mounted axial fan (not shown) and heat dissipation vents on both sides of the enclosure. The fan outlets are directly facing the heat-generating areas of the AC circuit breaker 5 and the DC contactor. Through air convection, the main heat-generating components of the AC power distribution unit, the AC circuit breaker 5 and the current transformer, as well as the main heat-generating components of the DC power distribution unit, the DC contactor and the pre-charge resistor 10, are cooled simultaneously. The cooling efficiency is more than 30% higher than that of the traditional dual system.

[0048] As mentioned above, the core components of the AC power distribution unit, such as the AC incoming terminal block 21 and current transformers (including W, V, and U three-phase current transformers), and the core components of the DC power distribution unit, such as the DC circuit breaker 14, are arranged adjacent to each other in the middle area of ​​the enclosure to facilitate short-distance cable connections. The auxiliary components of the AC power distribution unit, such as the energy meter 7 and the control power supply 6, and the auxiliary components of the DC power distribution unit, such as the pre-charge assembly, are distributed in the edge areas on both sides of the enclosure, forming an integrated structure that is functionally independent yet mutually complementary.

[0049] The AC / DC integrated energy storage cabinet provided by this utility model, in actual use, the AC power supply enters the AC / DC integrated cabinet through the AC input terminal block 21, and then passes through the W-phase current transformer, V-phase current transformer, and U-phase current transformer in sequence to realize three-phase current detection. After being protected by the AC circuit breaker 5, it is transmitted to the PCS three-phase power plug of the AC interface and enters the external PCS. After the PCS converts the three-phase AC power into DC power, it returns to the DC power distribution unit inside the cabinet through the PCS positive plug and PCS negative plug. The converted DC power passes through the DC circuit breaker 14, DC positive contactor 11 / DC negative contactor 13 and DC fuse 12 in sequence. After pre-charging protection is completed by the pre-charging component (including pre-charging resistor 10 and pre-charging contactor 9), it finally charges the battery pack through the Pack plug (including Pack positive plug 15 and Pack negative plug 16).

[0050] During this process, the current data of the current transformer, the energy data of the energy meter 7, and the voltage data of the battery pack are collected in real time. When an overload, short circuit or other abnormality is detected, the corresponding circuit breaker or contactor is immediately controlled to disconnect to ensure system safety.

[0051] This embodiment achieves efficient integration of AC and DC power distribution through irregular partitioning, staggered component layout, and integrated design. While reducing space occupation, it improves system stability and heat dissipation efficiency, and is suitable for AC / DC conversion and power distribution scenarios of various energy storage cabinets.

[0052] In summary, the AC / DC integrated energy storage cabinet provided by this utility model has the following advantages compared with the prior art: By irregularly partitioning the interior of the enclosure according to the location of AC and DC power distribution components, the internal space of the enclosure can be fully utilized, improving space utilization and thus effectively reducing the overall volume of the enclosure. By effectively arranging the components and distributing them in a cross manner according to their volume, the volume occupied by the components is further reduced, thereby further reducing the overall volume of the enclosure. With a smaller enclosure size, the entire enclosure can be cooled using a single cooling system, further saving energy and reducing energy consumption.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An integrated AC / DC energy storage cabinet, comprising a cabinet body, characterized in that: The enclosure integrates an irregularly partitioned AC power distribution unit, a DC power distribution unit, a connection panel, and a heat dissipation system; wherein... An AC power distribution unit includes an AC incoming terminal block that is electrically connected and arranged in sequence, at least one set of current transformers, and an AC circuit breaker. A DC power distribution unit includes a DC circuit breaker, a DC contactor, and a precharge assembly that are electrically connected and arranged in sequence; The connection panel is located on the side wall of the enclosure near the current transformer and the DC circuit breaker, with DC and AC interfaces spaced at corresponding intervals. The heat dissipation system provides heat dissipation for both the AC power distribution unit and the DC power distribution unit. AC power enters the AC / DC integrated box through the AC power supply terminal block, and after passing through the AC circuit breaker and AC contactor, it enters the AC interface and is converted into DC power, which then charges the battery pack through the DC power distribution unit.

2. The AC / DC integrated energy storage cabinet as described in claim 1, characterized in that: The AC power distribution unit also includes an integrated energy meter and a control power supply, which are located inside the enclosure away from the connection panel.

3. The AC / DC integrated energy storage cabinet as described in claim 2, characterized in that: The connection panel is equipped with a control circuit power supply circuit breaker, and the control power supply is electrically connected to the AC power distribution unit and the DC power distribution unit respectively through the control circuit power supply circuit breaker.

4. The AC / DC integrated energy storage cabinet as described in claim 1, characterized in that: The current transformer includes a U-phase current transformer, a V-phase current transformer, and a W-phase current transformer arranged in sequence, with the three-phase current transformers arranged in parallel and staggered.

5. The AC / DC integrated energy storage cabinet as described in claim 4, characterized in that: The W-phase current transformer is located away from the AC incoming terminal block and close to the side wall of the enclosure. The U-phase current transformer is located away from the W-phase current transformer and close to the DC circuit breaker. The V-phase current transformer is located between the W-phase current transformer and the U-phase current transformer.

6. The AC / DC integrated energy storage cabinet as described in claim 1, characterized in that: The enclosure is also equipped with a controller, which is located on the side of the DC power distribution unit, away from the DC circuit breaker.

7. The AC / DC integrated energy storage cabinet as described in claim 1, characterized in that: The DC interface on the connection panel includes a Pack positive plug and a Pack negative plug, a PCS positive plug and a PCS negative plug, which are arranged opposite to each other on the connection panel.

8. The AC / DC integrated energy storage cabinet as described in claim 7, characterized in that: The AC interface on the connection panel includes a PCS three-phase plug disposed on the same side as the PCS negative plug and the AC input terminal block, and the PCS three-phase plug is disposed between the PCS negative plug and the AC input terminal block.

9. The AC / DC integrated energy storage cabinet as described in claim 8, characterized in that: The connection panel is equipped with an AC circuit breaker manual control, which is located between the PCS three-phase power plug and the AC incoming terminal block, and is mechanically connected to the AC circuit breaker.

10. The AC / DC integrated energy storage cabinet as described in claim 7, characterized in that: The connection panel is equipped with a DC circuit breaker manual control, which is located in the space enclosed by the Pack positive plug and Pack negative plug, the PCS positive plug and PCS negative plug, and is mechanically connected to the DC circuit breaker.

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