Distribution box, energy storage system and electric equipment

Abstract

The utility model provides a distribution box, an energy storage system and electric equipment, the distribution box comprises a box body, a first main control system and a second main control system, the first main control system and the second main control system are respectively connected with different battery clusters and respectively control the different battery clusters, the first main control system and the second main control system are both arranged in the box body, and the first main control system and the second main control system are connected with the box body. And the two terminals are electrically connected with each other in the box body. According to the invention, the problem of complex wiring caused by independent wiring of each cluster of battery packs and each distribution box in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of energy storage, and more specifically, to a distribution box, an energy storage system, and electrical equipment. Background Technology

[0002] In existing liquid-cooled energy storage system designs, the high-voltage box, as the core component connecting the energy storage battery pack to external equipment, is typically equipped with one high-voltage box per battery cluster. In this configuration, each high-voltage box is responsible for connecting and controlling a single battery cluster, using internal circuit breakers, pre-charge relays, and other protection and control devices to provide multiple protections against overcurrent, overvoltage, undervoltage, and short circuits. However, when the system contains multiple battery clusters, this one-to-one connection method leads to significant problems. Each high-voltage box is connected to each battery cluster via high-voltage power lines, and external communication between multiple high-voltage boxes is required. This results in numerous and complex external high-voltage power lines, and the communication lines between high-voltage boxes are excessively long and difficult to control in terms of length. Utility Model Content

[0003] The main objective of this application is to provide a distribution box, energy storage system, and electrical equipment to solve the problem of complex wiring caused by individual wiring of each battery pack and each distribution box in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a power distribution box is provided, including a box body, a first main control system and a second main control system, wherein the first main control system and the second main control system are respectively connected to different battery clusters and control different battery clusters respectively, and both the first main control system and the second main control system are disposed in the box body and are electrically connected to each other within the box body.

[0005] Furthermore, both the first and second main control systems include a management system and multiple devices. The management system is electrically connected to the devices and manages each battery cluster.

[0006] Furthermore, the components of the first main control system and the components of the second main control system are symmetrically arranged, and the components are electrically connected to each other.

[0007] Furthermore, the device includes at least one of a fuse, relay, disconnector, shunt, Hall element, and fan.

[0008] Furthermore, the projection of the management system of the first main control system onto the surface of the management system of the second main control system occupies 75%-85% of the surface area of ​​the management system of the second main control system, and the wiring ports of the management systems of the first and second main control systems face the same direction.

[0009] Furthermore, the devices of the first or second main control system and the management system are located at opposite ends of the same side of the enclosure.

[0010] Furthermore, the overall arrangement direction of each component in the first main control system and the overall arrangement direction of each component in the second main control system are both parallel to the horizontal length direction of the housing.

[0011] Furthermore, the distribution box also includes a control panel, which is located on one side of the box. The control panel is used to connect to multiple battery clusters, and the first main control system and the second main control system control the battery clusters through the control panel.

[0012] Furthermore, the control panel includes multiple high-voltage interfaces, and the first and second main control systems control different battery clusters by connecting to different high-voltage interfaces.

[0013] Furthermore, the box body includes a lid and a main body, which are movably connected, and a sealing gasket is provided between the lid and the main body.

[0014] Furthermore, the compression rate of the sealing gasket is 50%-80%.

[0015] According to another aspect of this application, an energy storage system is provided, including the aforementioned distribution box.

[0016] According to another aspect of this application, an electrical device is provided, including an electrical system and the aforementioned energy storage system, wherein the energy storage system is electrically connected to the electrical system and supplies power to the electrical system.

[0017] Instruction manual PN300021HZYWLN

[0018] By applying the technical solution of this application, a first main control system and a second main control system are housed within a single distribution box, thus merging the functions of two distribution boxes into one. This simplifies wiring inside and outside the distribution box, thereby improving system integration and installation efficiency. Furthermore, the merging of the functions of the two distribution boxes does not affect the independent control and management of the two battery clusters. Specifically, the distribution box in this embodiment houses two main control systems: a first main control system and a second main control system. These systems can independently control and manage their respective battery clusters. The first and second main control systems are electrically connected within the box, eliminating the need for external communication lines. This avoids the wiring between distribution boxes that is required when using multiple distribution boxes in the traditional method, making the overall wiring of the energy storage system simpler and more convenient. The reduced number of wires also lowers the risk of wiring errors, optimizing the overall layout of the energy storage system. This makes the installation and maintenance of the distribution boxes more convenient, while also reducing the number of boxes, thereby improving the integration and space utilization of the energy storage system. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 A schematic diagram of the distribution box of this application is shown;

[0021] Figure 2 A schematic diagram of the control panel structure is shown.

[0022] The above figures include the following reference numerals:

[0023] 10. Enclosure; 20. First main control system; 21. Management system; 22. Components; 30. Second main control system; 40. Control panel; 41. High voltage interface. Detailed Implementation

[0024] Instruction manual PN300021HZYWLN

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0028] It should be noted that "multiple" in the above embodiments refers to at least two.

[0029] To address the complex wiring issues caused by individual wiring of each battery pack and each distribution box in existing technologies, this application provides a distribution box, an energy storage system, and electrical equipment.

[0030] like Figures 1 to 2 The distribution box shown includes a box body 10, a first main control system 20 and a second main control system 30. The first main control system 20 and the second main control system 30 are respectively connected to different battery clusters and control different battery clusters respectively. The first main control system 20 and the second main control system 30 are both located inside the box body 10 and are electrically connected to each other inside the box body 10.

[0031] This embodiment combines the functions of two distribution boxes into one box 10 by setting the first main control system 20 and the second main control system 30 inside the box 10 of the distribution box. This simplifies the wiring inside and outside the distribution box, thereby improving the system integration and installation efficiency. Moreover, the merging of the functions of the two distribution boxes does not affect the independent control and management of the two battery clusters. Specifically, the distribution box 10 of this embodiment has two main control systems inside, namely a first main control system 20 and a second main control system 30. The first main control system 20 and the second main control system 30 can independently control and manage their respective battery clusters. At the same time, the first main control system 20 and the second main control system 30 are electrically connected inside the box 10, without the need for external communication lines. This avoids the wiring between distribution boxes when setting up multiple distribution boxes in the traditional way, making the overall wiring of the energy storage system simpler and more convenient. Moreover, the reduction in the number of wirings can reduce the risk of wiring errors, thereby optimizing the overall layout of the energy storage system, making the installation and maintenance of the distribution box more convenient, and reducing the number of boxes 10, thereby improving the integration and space utilization of the energy storage system.

[0032] It should be noted that a battery cluster refers to a cluster of battery packs, which is multiple battery packs.

[0033] In this embodiment, both the first main control system 20 and the second main control system 30 include a management system 21 and multiple devices 22. The management system 21 is electrically connected to the devices 22 and manages each battery cluster. In other words, the first main control system 20 and the second main control system 30 adopt a combined solution to form the core control part of a combined distribution box. The distribution box can simultaneously connect two battery clusters and share a single enclosure 10, changing the traditional wiring method of one distribution box connecting one battery cluster, reducing the number of enclosures 10 and saving installation space. Each of the two main control systems includes a management system 21 and multiple devices 22. These devices 22 mainly include, but are not limited to, fuses, high-voltage relays, disconnect switches, shunts, current and voltage sensors, and fans for heat dissipation. The management system 21 and these devices 22 are electrically connected through a precise circuit design, thereby enabling precise control of each device 22 and real-time monitoring of the battery cluster status.

[0034] Specifically, in this embodiment, the management system 21 of the first main control system 20 is responsible for Figure 1The system collects the voltage, temperature, and current of all cells in the battery cluster connected to the left-side circuit, manages the cluster-level voltage and current, and implements cluster-level protection strategies. Similarly, the management system 21 of the second control system is responsible for the battery pack management of the right-side circuit, performing the same monitoring and management tasks. The two main control systems exchange and synchronize data through electrical connection inside the distribution box, which not only simplifies the external communication harness between the distribution boxes but also improves the response speed and overall efficiency of the energy storage system. In this way, the two main control systems can work together to ensure the safety and stability of the energy storage system. At the same time, the simplified internal structure design of the enclosure 10 reduces the complexity of external wiring, thereby reducing maintenance costs and improving the convenience of installation and operation. In addition, when the device 22 includes a fan, the two main control systems can adjust the heat dissipation strategy in real time, thereby dynamically controlling the fan speed according to the current working status of the battery cluster and environmental conditions, thus optimizing the heat dissipation effect and extending battery life. Through the efficient collaboration of the first main control system 20 and the second main control system 30, the two-in-one distribution box in this embodiment can effectively manage two independent battery clusters, achieving better energy storage system performance and reliability.

[0035] In this embodiment, the components 22 of the first main control system 20 and the components 22 of the second main control system 30 are symmetrically arranged and electrically connected to each other. Specifically, firstly, the components 22 of the first main control system 20 and the components 22 of the second main control system 30 are of the same type and number. Secondly, each component 22 of the first main control system 20, including fuses, relays, disconnect switches, shunts, Hall sensors, and fans for heat dissipation, is arranged in a mirror-symmetrical manner with the same type of component 22 of the second main control system 30. This not only reflects aesthetics and structural balance but also ensures that the two main control systems can operate under similar working conditions and environments, thereby maintaining consistency and stability when managing two independent battery clusters.

[0036] Furthermore, in this embodiment, the various devices 22 can be electrically connected through the internal circuitry within the housing 10. This allows each main control system to independently monitor and control its corresponding battery cluster, while the two systems can exchange and synchronize data in real time through internal electrical connections, thereby jointly optimizing the overall performance of the energy storage system. For example, the fuse of the first main control system 20 can work in conjunction with the fuse of the second main control system 30 to ensure rapid action in the event of an overcurrent on either side, thus protecting the entire energy storage system from damage. High-voltage relays and disconnect switches can also work together to achieve precise control of the battery clusters, ensuring the safety and efficiency of power transmission. Hall effect sensors and other sensors provide crucial data support to the management system 21 by monitoring parameters such as current, voltage, and temperature in real time, enabling it to dynamically adjust control strategies based on real-time operating conditions. The symmetrical arrangement of cooling fans enhances the heat dissipation capacity of the energy storage system, ensuring that both battery clusters remain within a safe operating temperature range under high-power operation, effectively extending the lifespan of the energy storage system and improving its overall reliability. Through this symmetrical layout and efficient electrical connection between devices 22, the distribution box in this embodiment not only simplifies the wiring between the distribution box and the battery clusters but also optimizes the workflow of the distribution box, thereby achieving efficient and safe management and control of the energy storage system. Of course, in addition to the configuration of each main control system independently monitoring and controlling its corresponding battery cluster in this embodiment, depending on the actual situation, the first main control system 20 and the second main control system 30 can also be configured to be redundant. In this way, when one main control system fails, the other main control system can take over control of the failed main control system.

[0037] In this embodiment, device 22 includes at least one of a fuse, relay, disconnect switch, shunt, Hall element, and fan. Figure 1 As shown, both the first main control system 20 and the second main control system 30 in this embodiment include various devices 22 such as fuses, relays, disconnect switches, shunts, Hall effect elements, and fans, thereby enabling each main control system to perform comprehensive monitoring and control of the battery cluster, thus ensuring the safety and reliability of the system under various operating conditions. Figure 1 As shown, along Figure 1 From top to bottom, the components 22 of the first main control system 20, including the fan, fuse, relay, disconnect switch, shunt, Hall element, etc., are arranged sequentially. Figure 1 On the left side of the middle housing 10, the components 22 of the second main control system 30 are the same as those of the first main control system 20 and are symmetrically arranged. Figure 1 On the right side of the middle housing 10, the left and right sides can be interchanged, meaning that the components 22 of the first main control system 20 can also be located in... Figure 1 On the right side of the middle cabinet 10, and the PN300021HZYWLN devices 22 of the second main control system 30 are located in... Figure 1 The left side of the middle housing 10. Of course, other devices 22 can also be set according to actual needs to better manage and control each battery cluster.

[0038] In this embodiment, the projection of the management system 21 of the first main control system 20 onto the surface of the management system 21 of the second main control system 30 accounts for 75%-85% of the surface area of ​​the management system of the second main control system, and the wiring ports of the management systems of the first main control system 20 and the management systems of the second main control system 30 face the same direction, thereby optimizing the space utilization inside the housing 10. Specifically, in this embodiment, the management systems 21 of the first main control system 20 and the management systems 21 of the second main control system 30 are placed in parallel, and the two management systems 21 are partially overlapped, with an overlap rate of 75%-85%, preferably 80%. The plane containing the surface of the management system 21 of the second main control system 30 closest to the management system 21 of the first main control system 20 is called the projection plane. Then, the projected area of ​​the management system 21 of the first main control system 20 on the projection plane accounts for 75%-85% of the projected area of ​​the management system 21 of the second main control system 30 on the projection plane. The above-mentioned partial overlap refers to their physical partial overlap, but their respective control functions and data processing capabilities remain independent, thereby ensuring independent management and monitoring of the two battery clusters. The reason for using a partial stacking arrangement instead of a full stacking arrangement is to facilitate the operator's identification of the location of the management system 21 and to distinguish between the two management systems 21. In this embodiment, the management system 21 closer to the cover of the housing 10 allows a portion of the surface of the other management system 21 with its wiring ports to be exposed. This saves space without affecting the identification of the wiring ports of the management system 21 located below. The wiring ports of both management systems 21 face the same direction, and both wiring ports face the interior of the housing 10. That is, compared to the side opposite the wiring ports, the side with the wiring ports is closer to the center of the housing 10. This reduces cable routing when the management system 21 is connected to the various devices 22, resulting in a neater and more orderly wiring layout, reducing cable tangling and clutter, and facilitating installation and maintenance. This not only maximizes space utilization but also improves system integration and operational efficiency, simplifies the installation process, and reduces maintenance costs. Of course, the two management systems 21 can also be stacked completely, which can save more space.

[0039] In this embodiment, to optimize the internal layout of the distribution box and improve the ease of operation and maintenance efficiency of the device 22, the device 22 of the first main control system 20 or the second main control system 30 and the management system 21 are located at opposite ends on the same side of the box 10. Specifically, as shown... Figure 1 As shown, in this embodiment, each device 22 of the first main control system 20 is located in... Figure 1 On the left side, the components 22 of the second main control system 30 are located... Figure 1 On the right side, the management system 21 and the device 22 of the second main control system 30 are positioned opposite each other. The device 22 and the management system 21 are located on the same side of the enclosure 10, but at opposite ends. This reduces the length of signal and power cables, lowers signal attenuation and interference during transmission, thus ensuring data accuracy and system stability. It also aids in heat dissipation management; the distance between the device 22 and the management system 21 is effectively controlled, allowing for more precise layout of heat dissipation paths. Furthermore, it facilitates equipment inspection and maintenance, eliminating the need for frequent movement between different sides of the enclosure 10. Maintenance personnel can inspect and replace the device 22 of both main control systems from a single direction, improving maintenance efficiency and reducing costs. Wiring is also more intuitive and convenient, reducing the possibility of wiring errors and accelerating the deployment of the energy storage system. Of course, depending on actual needs, the management system 21 can also be positioned opposite the device 22 of the first main control system 20. Figure 1 The management system 21 in the image is mirrored to Figure 1 It can be on the left side.

[0040] In this embodiment, the overall arrangement direction of each component 22 in the first main control system 20 and the overall arrangement direction of each component 22 in the second main control system 30 are both parallel to the lateral length direction of the enclosure 10, thereby making full use of the space inside the enclosure 10 and improving maintenance convenience. Specifically, compared with the traditional enclosure 10, the enclosure 10 in this embodiment only changes the lateral dimension of the enclosure 10, while other dimensions remain unchanged, so that the combined distribution box can still maintain compatibility with the battery pack size, thus avoiding additional installation space. Arranging the components 22 along the lateral length direction of the enclosure 10 can effectively utilize the long strip space inside the enclosure 10, thereby avoiding the components 22 being too densely or scattered, thus reducing space waste. It should be noted that the lateral length direction of the enclosure 10 in this embodiment refers to Figure 1 The up and down directions in the middle.

[0041] In this embodiment, considering ease of operation, information visualization, and efficient connection with multiple battery clusters, the distribution box also includes a control panel 40. The control panel 40 is located on one side of the enclosure 10 and is used to connect to multiple battery clusters. The first main control system 20 and the second main control system 30 control the battery clusters through the control panel 40. Specifically, the operation panel can be located on an easily accessible side of the enclosure 10, allowing operators to easily monitor and adjust the energy storage system through the control panel 40, thereby improving operational convenience and response speed. Figure 2 As shown, the control panel 40 in this embodiment includes multiple connection interfaces, each connecting to one of the two battery clusters. The connection interfaces connecting the two battery clusters are symmetrically arranged on the left and right sides of the control panel 40, and each connection interface connects to the positive and negative terminals of the battery cluster, the energy storage converter, etc. Operators can quickly connect the battery clusters to the main control system using the connection interfaces on the control panel 40. The first main control system 20 and the second main control system 30 then use the control panel 40 to achieve real-time monitoring and precise control of each battery cluster, thereby ensuring efficient power transmission and the safe operation of the energy storage system.

[0042] In this embodiment, the control panel 40 includes multiple high-voltage interfaces 41. The first main control system 20 and the second main control system 30 control different battery clusters by connecting to different high-voltage interfaces 41, thereby achieving precise control and efficient management of different battery clusters. The first main control system 20 and the second main control system 30, by connecting to different high-voltage interfaces 41, achieve independent control and monitoring of their respective battery clusters. This ensures that even if one battery cluster or main control system fails, it will not affect the normal operation of another battery cluster, thus improving the overall redundancy and reliability of the system. Simultaneously, through the shared control panel 40, two sets of high-voltage interfaces 41 are led out from one control panel 40, connecting to two battery clusters respectively, simplifying the wiring between the distribution box and the battery clusters. The multiple high-voltage interfaces 41 in this embodiment not only meet the access requirements of multiple battery clusters but also ensure safety and compatibility. Each high-voltage interface 41 can adopt an anti-misinsertion design to ensure that only the correct battery cluster can be connected, thereby avoiding energy storage system failures or safety risks caused by incorrect wiring. In addition, the specifications and type of the high-voltage interface 41 can be set according to the characteristics of different battery clusters, such as voltage level, current capacity and connection standard, thereby ensuring the wide adaptability of the high-voltage interface 41.

[0043] The distribution box in this embodiment meets the IP65 protection standard, and the protection level of the high-voltage interface 41 matches that of the enclosure 10. This ensures the safety of operators and the energy storage system even in harsh environmental conditions. Simultaneously, the control panel 40 integrates an emergency shut-off function. If any abnormality is detected in the battery cluster or inside the enclosure 10, such as overheating, overvoltage, or a short circuit, the connection to the battery cluster can be quickly cut off via the control panel 40 to prevent further escalation of the accident, thereby ensuring the safe operation of the entire energy storage system.

[0044] In this embodiment, the enclosure 10 includes a cover and a main body, which are movably connected. A sealing gasket is provided between the cover and the main body to ensure the sealing and protection level of the distribution box. Specifically, to facilitate the installation and maintenance of the components 22 and management system 21 inside the enclosure 10, the enclosure 10 is provided with a cover. The cover can be located on a side of the enclosure 10 that is convenient for maintenance. The cover and the main body can be hinged, snap-fitted, or slidably connected, and can be locked with a latch, thereby facilitating the disassembly and maintenance of the distribution box while ensuring the structural stability of the enclosure 10. The sealing gasket can be made of elastic materials such as rubber, sufficient to ensure the sealing between the cover and the main body.

[0045] In this embodiment, the compression rate of the sealing gasket is 50%-80%, thus ensuring a tight seal between the cover and the main body. A compression rate of 50%-80% means that when the cover and main body are closed, the gasket can effectively compress and fill the tiny gap between them, forming a tight sealing layer. This ensures that liquids or gases cannot penetrate, and also prevents external dust, moisture, and contaminants from entering the enclosure, ensuring the safe and stable operation of internal electrical components. Furthermore, it ensures that the sealing gasket maintains its high-efficiency sealing performance even during frequent opening and closing of the cover, thereby extending the lifespan of the enclosure. This application also provides an energy storage system, including the aforementioned distribution box, which allows the energy storage system to overcome the limitations of traditional multi-enclosure setups and achieve a higher level of integration. The energy storage system of this embodiment not only reduces installation space requirements but also simplifies the wiring and control logic within the energy storage system, thereby reducing the complexity of energy storage system operation and maintenance and improving the operating efficiency of the energy storage system. Moreover, this energy storage system achieves refined energy management of the battery clusters through the first main control system 20 and the second main control system 30 in the distribution box. This enables real-time monitoring of key parameters such as the charging and discharging status, temperature, voltage, and current of the battery clusters, thereby ensuring maximum energy utilization and extending the service life of the battery clusters.

[0046] This application also provides an electrical device, including an electrical system and the aforementioned energy storage system. The energy storage system is electrically connected to the electrical system and supplies power to it. In this way, the energy storage system provides real-time power to the electrical system, thereby ensuring the reliable operation of the electrical device.

[0047] It should be noted that "multiple" in the above embodiments refers to at least two.

[0048] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0049] 1. This solves the problem of complex wiring caused by separate wiring for each battery pack and each distribution box in existing technologies;

[0050] 2. By setting the first and second main control systems within a single distribution box, the functions of the two distribution boxes are combined into one box, simplifying the wiring inside and outside the distribution box, thereby improving system integration and installation efficiency. Moreover, the merging of the functions of the two distribution boxes does not affect the independent control and management of the two battery clusters.

[0051] Instruction manual PN300021HZYWLN

[0052] Obviously, the embodiments described above are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort should fall within the scope of protection of this application.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A distribution box, characterized in that, The power distribution box comprises: a box body (10); a first main control system (20); a second main control system (30), the first main control system (20) and the second main control system (30) are respectively connected with different battery clusters and respectively control different battery clusters, the first main control system (20) and the second main control system (30) are arranged in the box body (10) and are electrically connected with each other in the box body (10).

2. The electrical distribution box of claim 1, wherein, The first main control system (20) and the second main control system (30) each comprise a management system (21) and a plurality of devices (22), the management system (21) is electrically connected with the devices (22) and manages each battery cluster.

3. The electrical distribution box of claim 2, wherein, The devices (22) of the first main control system (20) and the devices (22) of the second main control system (30) are symmetrically arranged, and the devices (22) are electrically connected.

4. The electrical distribution box of claim 2, wherein, The devices (22) comprise at least one of a fuse, a relay, a disconnector, a shunt, a Hall element, and a fan.

5. The electrical distribution box of claim 2, wherein, The projection of the management system (21) of the first main control system (20) on the surface of the management system (21) of the second main control system (30) accounts for 75%-85% of the surface area of the management system (21) of the second main control system (30), and the wiring ports of the management system (21) of the first main control system (20) and the management system (21) of the second main control system (30) are oriented in the same direction.

6. The electrical distribution box of claim 5, wherein, The devices (22) of the first main control system (20) or the second main control system (30) and the management system (21) are arranged at two opposite ends of the same side of the box body (10).

7. The electrical distribution box of claim 2, wherein, The overall arrangement direction of each device (22) of the first main control system (20) and the overall arrangement direction of each device (22) of the second main control system (30) are parallel to the transverse length direction of the box body (10).

8. The electrical distribution box of claim 1, wherein, The power distribution box further comprises a control panel (40) arranged on one side of the box body (10), the control panel (40) is used for being connected with a plurality of battery clusters, and the first main control system (20) and the second main control system (30) control the battery clusters through the control panel (40).

9. The electrical distribution box of claim 8, wherein, The control panel (40) comprises a plurality of high-voltage interfaces (41), the first main control system (20) and the second main control system (30) control different battery clusters by connecting different high-voltage interfaces (41).

10. The electrical distribution box of claim 1, wherein, The box body (10) comprises a box cover and a main body, the box cover and the main body are movably connected, and a sealing rubber gasket is arranged between the box cover and the main body.

11. The electrical distribution box of claim 10, wherein, The compression rate of the sealing rubber gasket is 50%-80%.

12. An energy storage system characterized by, The power distribution box comprises any one of claims 1-11.

13. An electrical device, characterized by The power distribution box comprises any one of claims 1-11. The power distribution box comprises any one of claims 1-11.

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