Distribution convergence cabinet of distributed energy storage system

Abstract

The utility model discloses a power distribution confluence cabinet of a distributed energy storage system. The power distribution confluence cabinet comprises a box shell, a power distribution assembly, a confluence assembly and a transformer. The box shell is provided with a cavity, a longitudinal partition plate and a horizontal partition plate are arranged in the box shell, the longitudinal partition plate divides the cavity into a left side cavity and a right side cavity, and the horizontal partition plate divides the left side cavity into a left upper cavity and a left lower cavity. The power distribution assembly is arranged in the left upper cavity. And the confluence assembly is arranged in the right side cavity. The transformer is arranged in the left lower cavity, and the output end of the transformer is connected to the power distribution assembly. The power distribution confluence cabinet integrates the power distribution assembly, the confluence assembly and the transformer, space is saved, cost is reduced, the power distribution assembly and the confluence assembly are arranged in the left cavity and the right cavity respectively, the wire inlet unit and the wire outlet unit of the power distribution assembly do not need to pass through the right cavity, interference and noise between different circuits cannot be formed, and the power distribution confluence cabinet is simple in structure and convenient to use. And the maintenance time of the equipment is shortened, and the safety during overhauling is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage system technology, and in particular to a power distribution combiner cabinet for a distributed energy storage system. Background Technology

[0002] In the current energy storage market, electrochemical energy storage dominates. Distributed energy storage systems are an important form of electrochemical energy storage. Energy storage systems include combiner cabinets and distribution cabinets. The combiner cabinet is the main circuit electrical switching equipment closest to the battery clusters in an electrochemical energy storage system. Its main functions are to realize parallel current combining of multiple battery clusters, DC line measurement and protection, and electrical connection with the PCS (Power Control System). The distribution cabinet mainly contains the power distribution equipment, data acquisition equipment, communication equipment, and secondary equipment such as the system BMS (Battery Management System) for the battery energy storage system control system. Energy storage systems in North America also require transformers, whose main function is to step down the North American 480V power to 380V to power the devices in the distribution cabinet.

[0003] Current technologies often use a vertical arrangement of distribution cabinets and combiner cabinets, with the distribution room on top and the combiner room below, while the transformer is housed in a separate enclosure. However, this vertical arrangement makes it difficult to create separate compartments. The incoming and outgoing lines from the distribution room must pass through the combiner room, inevitably leading to interference and noise between different circuits, and affecting equipment maintenance time and safety during repairs. Furthermore, not integrating the transformer into the distribution combiner cabinet increases the number of devices in the distributed energy storage system, increasing the footprint, and requiring external cabling between the distribution cabinet and the transformer, thus increasing costs.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] To solve one of the above-mentioned technical problems, this utility model provides a power distribution combiner cabinet for a distributed energy storage system.

[0006] The present invention adopts the following technical solution:

[0007] The purpose of this application is to provide a power distribution combiner cabinet for a distributed energy storage system, comprising:

[0008] A housing with a cavity, wherein a longitudinal partition and a horizontal partition are provided inside the housing, the longitudinal partition dividing the cavity into a left side cavity and a right side cavity, and the horizontal partition dividing the left side cavity into an upper left cavity and a lower left cavity;

[0009] A power distribution assembly, wherein the power distribution assembly is disposed within the upper left cavity;

[0010] A manifold assembly, wherein the manifold assembly is disposed within the right-side cavity;

[0011] A transformer is disposed in the lower left cavity, and the output terminal of the transformer is connected to the power distribution assembly.

[0012] Optionally, the enclosure has a bottom wall, a top wall, and two side walls;

[0013] The top wall and bottom wall are spaced apart vertically;

[0014] The two sidewalls are respectively disposed on both sides of the bottom wall, and the sidewalls are respectively connected to the top wall and the bottom wall, and the top wall, the bottom wall and the sidewalls enclose the cavity;

[0015] The longitudinal partition is located inside the cavity and is parallel to the side wall. The upper and lower ends of the longitudinal partition are connected to the top wall and the bottom wall, respectively. The longitudinal partition divides the cavity into a left cavity and a right cavity.

[0016] The horizontal partition is located in the left cavity, and the horizontal partition is connected to the side wall and the longitudinal partition respectively, so as to divide the left cavity into the upper left cavity and the lower left cavity.

[0017] Optionally, the horizontal partition is provided with a cable routing clearance hole, so that the cable extending through the lower left cavity can pass through the cable routing clearance hole to extend to the upper left cavity.

[0018] Optionally, within the left cavity, the cables are divided into high-voltage cables and low-voltage cables, with at least a portion of the high-voltage cables located on one side of the side plate and extending longitudinally, and at least a portion of the low-voltage cables located on one side of the longitudinal partition and extending longitudinally.

[0019] Optionally, a high-voltage cable box and a low-voltage cable box are provided in the left cavity;

[0020] The high-voltage cable box includes a high-voltage longitudinal cable box, and the low-voltage cable box includes a low-voltage longitudinal cable box. The high-voltage longitudinal cable box is disposed on one side of the side plate, and the low-voltage longitudinal cable box is disposed on one side of the longitudinal partition.

[0021] Both the high-voltage longitudinal cable box and the low-voltage longitudinal cable box have cable routing channels.

[0022] Optionally, the power distribution components are divided into high-voltage devices and low-voltage devices;

[0023] Each of the high-voltage devices is disposed on the side of the upper left cavity near the horizontal partition;

[0024] Each of the low-voltage devices is disposed in the upper left cavity, and each of the low-voltage devices is located on the side of the high-voltage device away from the horizontal partition.

[0025] The extension height of the high-voltage longitudinal cable box is less than the extension height of the low-voltage longitudinal cable box.

[0026] Optionally, a high-voltage power inlet and a low-voltage power inlet are provided on the bottom wall;

[0027] Both the high-voltage and low-voltage inlets are connected to the lower left cavity, with the high-voltage inlet closer to the side plate and the low-voltage inlet closer to the longitudinal partition.

[0028] Optionally, the distributed energy storage system's power distribution combiner cabinet includes a left door and a right door;

[0029] The left door is movably connected to the housing and is used to open or close the left side cavity;

[0030] The right door is movably disposed on the housing and is used to open or close the right side cavity.

[0031] Optionally, the bottom wall is provided with a battery cabinet inlet hole and a PCS cabinet outlet hole;

[0032] The battery cabinet inlet and the PCS cabinet outlet are both connected to the right-side cavity.

[0033] Optionally, the longitudinal partition is a metal plate.

[0034] By adopting the above technical solution, this application has the following beneficial effects:

[0035] This utility model's power distribution combiner cabinet integrates power distribution components, combiner components, and a transformer, saving space and reducing costs. In this embodiment, the combiner components, power distribution components, and transformer are separated into separate chambers by longitudinal and horizontal partitions, reducing electromagnetic interference, improving equipment safety, and lowering the risk of electric shock to personnel during maintenance. In this embodiment, the power distribution components and combiner components are arranged in left and right chambers, so the incoming and outgoing units of the power distribution components do not need to pass through the right chamber, preventing interference and noise between different circuits, reducing equipment maintenance time, and improving safety during maintenance.

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0037] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0038] Figure 1This diagram shows the external structure of the power distribution combiner cabinet of the distributed energy storage system provided in an embodiment of this application.

[0039] Figure 2 This illustration shows a first internal structure diagram of the power distribution combiner cabinet of the distributed energy storage system provided in an embodiment of this application;

[0040] Figure 3 This diagram illustrates the second internal structure of the power distribution combiner cabinet of the distributed energy storage system provided in an embodiment of this application.

[0041] Figure 4 This diagram shows the third internal structure of the power distribution combiner cabinet of the distributed energy storage system provided in the embodiment of this application.

[0042] In the diagram: 1. Enclosure; 11. Longitudinal partition; 111. Fourth connecting port; 112. Fifth connecting port; 12. Left side cavity; 121. Upper left cavity; 1211. Component mounting plate; 122. Lower left cavity; 123. Horizontal partition; 124. High-voltage longitudinal cable box; 125. Low-voltage longitudinal cable box; 13. Right side cavity; 131. Front right cavity; 132. Rear right cavity; 1321. Horizontal mesh plate; 1322. Upper rear cavity; 1323. Lower rear cavity; 15. Inner partition; 151. First connecting port; 16. Box body; 161. Second connecting port; 162. Third connecting port; 163. Switch chamber; 17. Left door body; 18. Right door body; 2. Power distribution components; 21. High voltage devices; 211. UPS module; 22. Low voltage devices; 3. Busbar assembly; 31. Busbar; 32. Linear fuse; 33. Frame switch; 4. Air inlet duct; 41. Guide plate; 42. Baffle plate; 5. Air conditioner; 6. Transformer; 7. Cooling fan.

[0043] It should be noted that these accompanying drawings and textual descriptions 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

[0044] 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.

[0045] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., 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 component 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.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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.

[0047] Example 1

[0048] like Figures 1 to 4 As shown in the figure, this application embodiment provides a distributed energy storage system power distribution combiner cabinet, which includes: a housing 1, a power distribution component 2, a combiner component 3, and a transformer 6. The housing 1 has a cavity, and a longitudinal partition 11 and a horizontal partition 123 are provided inside the housing 1. The longitudinal partition 11 divides the cavity into a left cavity 12 and a right cavity 13, and the horizontal partition 123 divides the left cavity 12 into an upper left cavity 121 and a lower left cavity 122. The power distribution component 2 is disposed in the upper left cavity 121, the combiner component 3 is disposed in the right cavity 13, and the transformer 6 is disposed in the lower left cavity 122. The output terminal of the transformer 6 is connected to the power distribution component 2.

[0049] In this embodiment, the main function of transformer 6 is to step down the 480V North American electricity to 380V to power the devices within the power distribution component 2. This utility model's power distribution combiner cabinet integrates power distribution component 2, combiner component 3, and transformer 6, saving space and reducing costs. In this embodiment, combiner component 3, power distribution component 2, and transformer 6 are separated into separate chambers by longitudinal partition 11 and horizontal partition 123, reducing electromagnetic interference, improving equipment safety, and lowering the risk of electric shock to personnel during maintenance. In this embodiment, power distribution component 2 and combiner component 3 are separated into left and right chambers. The incoming and outgoing units of power distribution component 2 do not need to pass through the right chamber 13, preventing interference and noise between different circuits, reducing equipment maintenance time, and improving safety during maintenance.

[0050] In this embodiment, the power distribution component 2 and the transformer 6 are placed close together, which minimizes the cable length and solves the problem of increased system footprint and cable cost caused by the transformer 6 being packaged separately.

[0051] In this embodiment, the transformer 6 is integrated into the enclosure 1, eliminating the need for a separate cabinet. This reduces the number of devices in the entire distributed energy storage system and decreases the floor space required. The cable length between the power distribution component 2 and the transformer 6 is changed to the cable inside the cabinet, which is shorter and reduces costs.

[0052] In some possible implementations, the housing 1 has a bottom wall, a top wall, and two side walls. The top wall and the bottom wall are spaced apart vertically. The two side walls are located on both sides of the bottom wall and are connected to the top wall and the bottom wall, respectively. The top wall, the bottom wall, and the side walls enclose the cavity. A longitudinal partition 11 is located in the cavity and is parallel to the side walls. The upper and lower ends of the longitudinal partition 11 are connected to the top wall and the bottom wall, respectively. The longitudinal partition 11 divides the cavity into a left cavity 12 and a right cavity 13. A horizontal partition 123 is located in the left cavity 12 and is connected to the side wall and the longitudinal partition 11, thereby dividing the left cavity 12 into an upper left cavity 121 and a lower left cavity 122.

[0053] The aforementioned longitudinal partition 11 can be made of metal, and the horizontal partition 123 can also be made of metal. Using metal plates for compartments in the power distribution cabinet provides high safety and shields against electromagnetic interference. The upper left cavity 121, lower left cavity 122, and right side cavity 13 are all compartments formed by metal plates separating them. These metal plate compartments effectively prevent electric shock and the spread of faults. Each compartment is independent and enclosed, preventing operators from accidentally contacting components in other energized compartments during maintenance, thus avoiding the risk of electric shock. Furthermore, when a fault occurs inside one compartment, the metal partitions and insulation measures can prevent the fault current and arc from spreading to other compartments, reducing the impact on the entire distribution cabinet and even the power system. Metal plates have excellent electromagnetic shielding properties, effectively reducing interference from external electromagnetic waves to the internal electrical components of the enclosure 1, improving the stability and reliability of the equipment.

[0054] In some possible implementations, a cable routing clearance hole is provided on the horizontal partition 123, through which a cable extending through the lower left cavity 122 can pass to the upper left cavity 121.

[0055] In some possible implementations, within the left-side cavity 12, the cables are divided into high-voltage cables and low-voltage cables. At least a portion of the high-voltage cables are located on one side of the side plate and extend longitudinally, while at least a portion of the low-voltage cables are located on one side of the longitudinal partition 11 and extend longitudinally. The high-voltage cables can be 380V and 220V AC power distribution circuits, while the low-voltage cables are signal lines, typically 24V cables. Separating the high-voltage and low-voltage cables helps reduce interference and noise between circuits.

[0056] The busbar assembly 3 in the right cavity 13 is a 1500V DC busbar circuit. The left cavity 12 and the right cavity 13 are separated by a metal plate. Cables of different voltages have independent cable trays, which isolates interference and noise between different circuits to the greatest extent.

[0057] In some possible implementations, a high-voltage cable box and a low-voltage cable box are provided in the left side cavity 12. The high-voltage cable box includes a high-voltage longitudinal cable box 124, and the low-voltage cable box includes a low-voltage longitudinal cable box 125. The high-voltage longitudinal cable box 124 is located on one side of the side plate, and the low-voltage longitudinal cable box 125 is located on one side of the longitudinal partition 11. Both the high-voltage longitudinal cable box 124 and the low-voltage longitudinal cable box 125 have cable routing channels.

[0058] Cables of different voltages are run through separate cable boxes. These independent cable boxes maximize isolation from interference and noise between different circuits. The high-voltage cable box includes both a longitudinal high-voltage cable box 124 and a transverse high-voltage cable box, while the low-voltage cable box includes both a longitudinal low-voltage cable box 125 and a transverse low-voltage cable box. High-voltage cables are run through high-voltage cable boxes, and low-voltage cables are run through low-voltage cable boxes, maximizing isolation from interference and noise between different circuits.

[0059] In some possible implementations, the power distribution assembly 2 is divided into high-voltage devices 21 and low-voltage devices 22. High-voltage devices 21 refer to devices that use 380V and 220V AC power, while low-voltage devices 22 refer to devices that use 24V power. The specific types of each device in the high-voltage devices 21 and low-voltage devices 22 within the power distribution assembly 2 are conventional techniques in the art and will not be described in detail here.

[0060] Each of the high-voltage devices 21 is disposed on the side of the upper left cavity 121 near the horizontal partition 123, and each of the low-voltage devices 22 is disposed in the upper left cavity 121, with each of the low-voltage devices 22 located on the side of the high-voltage devices 21 away from the horizontal partition 123. The extension height of the high-voltage longitudinal cable box 124 is less than the extension height of the low-voltage longitudinal cable box 125.

[0061] This embodiment of the application performs a secondary classification of the power distribution component 2. AC 380V and 220V devices are arranged on the lower side, with related terminals on the left side. The 24V low-voltage device 22 is arranged on the upper side, with related lines and terminals mainly arranged on the right side. This completely separates and divides the two cables, and corresponding cable labels are affixed to the cable trays. This utility model optimizes the power distribution component 2 and the busbar component 3, simplifying maintenance and significantly reducing repair time. Specifically, high-voltage cables are used to electrically connect to the high-voltage device 21, and low-voltage cables are used to electrically connect to the low-voltage device 22.

[0062] In some possible implementations, a high-voltage power inlet and a low-voltage power inlet are provided on the bottom wall. Both the high-voltage power inlet and the low-voltage power inlet are connected to the lower left cavity 122. The high-voltage power inlet is close to the side plate, and the low-voltage power inlet is close to the longitudinal partition 11.

[0063] On the bottom left side of transformer chamber 6 in the lower left cavity 122, open 380V and 220V inlet holes (high voltage inlet) and open 24V signal line inlet hole (low voltage inlet) on the right side. Arrange appropriately sized cable trays (cable boxes) along the direction of the two cables to completely separate and isolate the two cables, and attach corresponding cable labels to the cable trays.

[0064] In some possible implementations, the distributed energy storage system power distribution junction box includes a left door 17 and a right door 18. The left door 17 is movably connected to the housing 1 for opening or closing the left side cavity 12, and the right door 18 is movably disposed on the housing 1 for opening or closing the right side cavity 13.

[0065] In this application, the left cavity 12 and the right cavity 13 are each equipped with an independent door panel. The bottom of the left cavity 12 and the right cavity 13 have their own inlet and outlet positions, and there is no intersection of the lines between the two chambers. Different circuits have corresponding wire grooves. When repairing and inspecting electrical circuits, it is only necessary to open the corresponding door panel and find the corresponding wire groove, which solves the problems of long maintenance time and unsafe maintenance.

[0066] In some possible implementations, a battery cabinet inlet and a PCS cabinet outlet are provided on the bottom wall to facilitate the connection of the busbar assembly 3 to the battery cabinet and the PCS cabinet respectively via cables. Both the battery cabinet inlet and the PCS cabinet outlet are connected to the right-side cavity 13. The cable holes of the power distribution assembly 2 and the busbar assembly 3 are separated to prevent interference, and binding points can also be arranged on the bottom wall to facilitate cable fixing.

[0067] Example 2

[0068] See Figures 1 to 4 As shown in the illustration, this application provides a detailed description of a power distribution junction box, which includes: a housing 1, a power distribution assembly 2, a junction assembly 3, an air inlet duct 4, and an air conditioner 5. The housing 1 has a cavity, and a longitudinal partition 11 is provided inside the housing 1. The longitudinal partition 11 divides the cavity into a left cavity 12 and a right cavity 13, which are connected. The power distribution assembly 2 is disposed in the left cavity 12, the junction assembly 3 is disposed in the right cavity 13, the air inlet duct 4 is located in the right cavity 13, and the air conditioner 5 is disposed on the housing 1. The air conditioner 5 has an air outlet, which is connected to the air inlet duct 4. The cold air discharged by the air conditioner 5 enters the right cavity 13 through the air inlet duct 4, and part of the cold air entering the right cavity 13 enters the left cavity 12.

[0069] The power distribution combiner cabinet of this application can simultaneously cool the power distribution component 2 and the combiner component 3 through an air conditioner 5. It has a simple structure, reduces energy consumption, and lowers costs.

[0070] In some possible implementations, an inner partition 15 is provided inside the right side cavity 13, the inner partition 15 being vertically connected to the longitudinal partition 11. The inner partition 15 divides the right side cavity 13 into a right front cavity 131 and a right rear cavity 132. The air inlet duct 4 extends to the top of the right rear cavity 132. The busbar assembly 3 includes a busbar 31 and a linear fuse 32 disposed in the right rear cavity 132. A first connecting port 151 is provided on the inner partition 15 on the side of the busbar 31 away from the air inlet duct 4. The first connecting port 151 connects the right front cavity 131 and the right rear cavity 132. The air conditioner 5 has a return air vent, which connects to the right front cavity 131. The air inlet duct 4, the right rear cavity 132, the first connecting port 151, the right front cavity 131, and the return air vent of the air conditioner 5, arranged sequentially inside the housing 1, form a first cooling air path.

[0071] In this application, by forming a first cooling air path inside the housing 1, the high-power device busbar 31 and the linear fuse 32 in the right cavity 13 can be effectively cooled and dissipated.

[0072] Using air conditioner 5 to dissipate heat from power distribution component 2 and busbar component 3 is an effective method. In existing technologies, due to functional and safety requirements, high-power devices cannot be centrally located. Without proper guidance, the cold air from air conditioner 5 cannot accurately reach high-heat areas, leading to poor cooling in localized areas, overheating of devices, or low cooling efficiency, frequent start-ups of air conditioner 5, and increased energy consumption. To effectively solve this problem, the airflow direction of air conditioner 5 needs to be adjusted. Designing an air inlet duct 4 that can effectively guide airflow is a feasible solution to address the heat dissipation problem of dispersed high-power device layouts.

[0073] In this application, the air inlet duct 4 can be an air duct shell extending along the thickness direction of the housing 1, with the end of the air duct shell extending to the right rear cavity 132 and downwards. The shell wall at the top of the air inlet duct 4 includes a horizontally arranged guide plate 41 and a baffle plate 42 connected to the guide plate 41 and extending downwards at an angle. Based on the hydrodynamic properties of air, the air inlet duct 4 actively intervenes in the cold air of the air conditioner 5 by setting the guide plate 41 and the baffle plate 42, so that it can flow smoothly to the busbar assembly 3 first, accurately manage the heat of the high-heat area (busbar 31 and linear fuse 32), and reduce energy consumption.

[0074] In some possible implementations, a housing 16 is disposed within the right rear cavity 132, the housing 16 being connected to the inner partition 15. A switch cavity 163 is formed between the housing 16 and the inner partition 15. The busbar assembly 3 includes a frame switch 33 disposed within the switch cavity 163. A second connecting port 161 is provided on the inner partition 15, connecting the switch cavity 163 and the right rear cavity 132. The second connecting port 161 is located between the air inlet duct 4 and the busbar 31. A third connecting port 162 is provided on the housing 16, connecting the switch cavity 163 and the right front cavity 131. The air inlet duct 4, the right rear cavity 132, the second connecting port 161, the switch cavity 163, the third connecting port 162, the right front cavity 131, and the return air vent of the air conditioner 5, arranged sequentially within the housing 1, form a second cooling air path. The frame switch 33 and the busbar 31 are disposed in separate cavities from the linear fuse 32, improving safety. In this embodiment, a second cooling airflow path is formed inside the housing 1 specifically for cooling the frame switch 33. Furthermore, considering that the temperature of the frame switch 33 is lower than that of the busbar 31 and the linear fuse 32, a second connecting port 161 is provided on the side between the air inlet duct 4 and the busbar 31. This allows a small amount of hot or cold air to enter the switch cavity 163 through the second connecting port 161 to cool the frame switch 33. Importantly, the inner partition 15 and the housing 16 can be covered with mesh panels, which respectively cover the first connecting port 151 and the second connecting port 161. By adjusting the mesh density and opening size of each mesh panel, and using simulation tools to adjust the angle of the baffle plate 42, the airflow path and volume can be actively controlled to achieve precise and efficient thermal management of the power distribution combiner cabinet.

[0075] In some possible implementations, a fourth connecting port 111 and a fifth connecting port 112 are provided on the longitudinal partition 11. The fourth connecting port 111 connects the right rear cavity 132 and the left side cavity 12, and the fifth connecting port 112 connects the right front cavity 131 and the left side cavity 12. The air inlet duct 4, the right rear cavity 132, the fourth connecting port 111, the left side cavity 12, the fifth connecting port 112, and the return air vent of the air conditioner 5 arranged sequentially inside the housing form a third cooling air path. In this embodiment, by setting the first, second, third, fourth, and fifth connecting ports 112, the cold air is actively intervened, thereby diverting it, accurately managing the heat of high-heat areas, and reducing energy consumption.

[0076] In some possible implementations, a horizontal mesh plate 1321 is provided in the right rear cavity 132, which divides the right rear cavity 132 into a rear upper cavity 1322 and a rear lower cavity 1323. The busbar 31 and the linear fuse 32 are located in the rear lower cavity 1323. The air inlet duct 4 is connected to the rear upper cavity 1322, and the fourth connecting port 111 is connected to the rear upper cavity 1322 and the left side cavity 12. The port of the air inlet duct 4 faces the horizontal mesh plate 1321.

[0077] After the cold air from the air conditioner 5 passes through the air inlet duct 4, a small portion of the cold air bounces off the horizontal mesh plate 1321 and then passes through the mesh plate covering the fourth connecting port 111 to the adjacent left cavity 12, carrying away the heat from the power distribution component 2. Finally, it reaches the air return vent of the air conditioner 5 through the fifth connecting port 112.

[0078] The baffle 42 and the guide plate 41 form an obtuse angle, which changes the airflow direction while reducing air bounce loss. The inside of the guide plate 41 and the baffle 42 is filled with heat insulation foam to reduce heat loss and prevent condensation. After the air conditioner 5 passes through the air inlet duct 4, most of the cold air passes through the horizontal mesh plate 1321 and blows directly onto the busbar 31 and the linear fuse 32, and then passes through the mesh plate covering the first connecting port 151, finally reaching the air outlet of the air conditioner 5.

[0079] The air inlet duct 4 is composed of a guide plate 41, a baffle plate 42, and insulating foam. The guide plate 41 is fitted to the air outlet of the air conditioner 5, and the baffle plate 42 forms an obtuse angle with the guide plate 41, which changes the airflow direction and reduces air bounce loss. The guide plate 41 and the baffle plate 42 are filled with insulating foam to reduce heat loss and prevent condensation. After passing through the air inlet duct 4, most of the cold air from the air conditioner 5 passes through the horizontal mesh plate 1321 and blows directly onto the busbar 31 and the DC fuse, eventually reaching the return air outlet of the air conditioner 5. A small portion of the cold air enters the left cavity 12 through the fourth connecting port 111 to cool the power distribution component 2. Two mesh plates can be installed on the longitudinal partition 11, covering the fourth connecting port 111 and the fifth connecting port 112 respectively. By adjusting the mesh density and size of the horizontal mesh plate 1321 and the mesh plate covering the fourth connecting port 111, the flow rate of the cold air can be adjusted to accurately manage the heat in the high-heat area and reduce energy consumption.

[0080] In some possible implementations, a device mounting plate 1211 is disposed within the left side cavity 12, and at least a portion of the power distribution components 2 are disposed on the device mounting plate 1211. The device mounting plate 1211 divides the left side cavity 12 into a left front cavity and a left rear cavity. A fourth connecting port 111 and a fifth connecting port 112 are respectively disposed on both sides of the device mounting plate 1211, and the left rear cavity is connected to the fourth connecting port 111, and the left front cavity is connected to the fifth connecting port 112. The air inlet duct 4, the right rear cavity 132, the fourth connecting port 111, the left rear cavity, the device mounting plate 1211, the left front cavity, the fifth connecting port 112, and the air return vent of the air conditioner 5, arranged sequentially within the housing, form the third cooling air path. The left rear cavity acts as a buffer and rectifyer for the cold airflow, allowing the cold air to pass evenly through the device mounting plate 1211 and cool the devices distributed on the device mounting plate 1211.

[0081] Most of the power distribution components 2 are mounted on the device mounting plate 1211. The cold air flowing along the third cooling air path can flow through the device mounting plate 1211 to cool down the various devices on the device mounting plate 1211.

[0082] In some possible implementations, the power distribution assembly 2 includes a UPS module 211, which is disposed within the left front cavity and near the fifth communication port 112. The UPS module 211 is a high-temperature component in the power distribution assembly 2, and the third cooling airflow can effectively cool the UPS module 211.

[0083] In some possible implementations, the new distributed energy storage system's power distribution combiner cabinet includes a horizontal partition 123 and a transformer 6. The horizontal partition 123 is located in the left side cavity 12 and divides the left side cavity 12 into an upper left cavity 121 and a lower left cavity 122. The power distribution component 2 is disposed in the upper left cavity 121, which is connected to the fourth connecting port 111 and the fifth connecting port 112. The transformer 6 is disposed in the lower left cavity 122. The lower left cavity 122 and the upper left cavity 121 are isolated from each other. If the transformer 6 overheats, it is not placed in the cooling air path of the air conditioner to avoid affecting the temperature of the air conditioner's cooling air path and thus the cooling effect on other components.

[0084] In some possible implementations, the new distributed energy storage system power distribution junction box includes a cooling fan 7, and an air inlet and an air outlet are provided on the housing 1. The air inlet and the air outlet are located on opposite sides of the lower left cavity 122, and the cooling fan 7 is provided on the housing 1 and covers the air outlet.

[0085] Louvers can be installed on the air inlet. When the cooling fan 7 rotates at high speed, it can blow the cold air from the outside of the housing 1 into the cabinet through the louvers on the air inlet of the housing 1, and blow it directly into the transformer 6. The air duct for cooling the transformer 6 is formed in the lower left cavity 122.

[0086] The power distribution unit provided in this embodiment can utilize a 3kW air conditioner 5 and a fan (cooling blower) for thermal management. Based on the amount of heat generated, the air conditioner 5 is designed with three cooling air paths. The cold air is distributed through a guide plate 41, a baffle plate 42, and multiple mesh plates. The first cooling air path dissipates heat from the busbar 31 and the linear fuse 32; the second cooling air path dissipates heat from the frame switch 33; and the third cooling air path dissipates heat from the power distribution components (such as the UPS). Since the transformer 6's operating temperature can cover the ambient temperature, a more economical fan (cooling blower 7) is used to form an airflow for auxiliary cooling.

[0087] In some possible implementations, the housing 1 includes a main housing, a left door 17, and a right door 18. The main housing has the left side cavity 12 and the right side cavity 13. The left door 17 is movably connected to the main housing for opening or closing the left side cavity 12. The cooling fan 7 is disposed on the left door 17. The right door 18 is movably connected to the main housing for opening or closing the right side cavity 13. The air conditioner 5 is disposed on the right door 18.

[0088] In this embodiment, the casing 1 is wrapped with rock wool, and the transformer 6 inside the lower left cavity 122 directly exchanges heat with the outside. The casing is separated from other components by rock wool. The thermal management system consists of an air conditioner 5 and a fan.

[0089] 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. 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. A power distribution combiner cabinet for a distributed energy storage system, characterized in that, include: A housing with a cavity, wherein a longitudinal partition and a horizontal partition are provided inside the housing, the longitudinal partition dividing the cavity into a left side cavity and a right side cavity, and the horizontal partition dividing the left side cavity into an upper left cavity and a lower left cavity; A power distribution assembly, wherein the power distribution assembly is disposed within the upper left cavity; A manifold assembly, wherein the manifold assembly is disposed within the right-side cavity; A transformer is disposed in the lower left cavity, and the output terminal of the transformer is connected to the power distribution assembly.

2. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that, The enclosure has a bottom wall, a top wall, and two side walls; The top wall and bottom wall are spaced apart vertically; The two sidewalls are respectively disposed on both sides of the bottom wall, and the sidewalls are respectively connected to the top wall and the bottom wall, and the top wall, the bottom wall and the sidewalls enclose the cavity; The longitudinal partition is located inside the cavity and is parallel to the side wall. The upper and lower ends of the longitudinal partition are connected to the top wall and the bottom wall, respectively. The longitudinal partition divides the cavity into a left cavity and a right cavity. The horizontal partition is located in the left cavity, and the horizontal partition is connected to the side wall and the longitudinal partition respectively, so as to divide the left cavity into the upper left cavity and the lower left cavity.

3. The distributed energy storage system power distribution combiner cabinet according to claim 2, characterized in that, The horizontal partition is provided with a cable routing clearance hole, and the cable extending through the lower left cavity can pass through the cable routing clearance hole to extend to the upper left cavity.

4. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that, Inside the left cavity, the cables are divided into high-voltage cables and low-voltage cables. At least a portion of the high-voltage cables are located on one side of the side plate and extend longitudinally, while at least a portion of the low-voltage cables are located on one side of the longitudinal partition and extend longitudinally.

5. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that, The left cavity is equipped with a high-voltage cable box and a low-voltage cable box. The high-voltage cable box includes a high-voltage longitudinal cable box, and the low-voltage cable box includes a low-voltage longitudinal cable box. The high-voltage longitudinal cable box is disposed on one side of the side plate, and the low-voltage longitudinal cable box is disposed on one side of the longitudinal partition. Both the high-voltage longitudinal cable box and the low-voltage longitudinal cable box have cable routing channels.

6. The distributed energy storage system power distribution combiner cabinet according to claim 5, characterized in that, The power distribution components are divided into high-voltage devices and low-voltage devices; Each of the high-voltage devices is disposed on the side of the upper left cavity near the horizontal partition; Each of the low-voltage devices is disposed in the upper left cavity, and each of the low-voltage devices is located on the side of the high-voltage device away from the horizontal partition. The extension height of the high-voltage longitudinal cable box is less than the extension height of the low-voltage longitudinal cable box.

7. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that, The bottom wall is provided with a high-voltage power inlet and a low-voltage power inlet; Both the high-voltage and low-voltage inlets are connected to the lower left cavity, with the high-voltage inlet closer to the side plate and the low-voltage inlet closer to the longitudinal partition.

8. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that, Including the left door and the right door; The left door is movably connected to the housing and is used to open or close the left side cavity; The right door is movably disposed on the housing and is used to open or close the right side cavity.

9. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that, The bottom wall is provided with a battery cabinet inlet hole and a PCS cabinet outlet hole. The battery cabinet inlet and the PCS cabinet outlet are both connected to the right-side cavity.

10. The power distribution combiner cabinet for a distributed energy storage system according to any one of claims 1-9, characterized in that, The longitudinal partition is a metal plate.

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