Energy storage device, electrical box, energy storage system and charging network

Abstract

The utility model is suitable for the technical field of energy storage, and provides an energy storage device, an electrical box, an energy storage system and a charging network, and the energy storage device comprises a box body which is provided with an electrical cabin and a battery cabin; the battery device is accommodated in the battery compartment; the electrical box is contained in the electrical bin, the electrical box comprises a cabinet body, a general control assembly and a power distribution assembly are arranged in the cabinet body, and the general control assembly comprises a battery management unit; according to the energy storage device provided by the embodiment of the invention, the power distribution assembly and the master control assembly are arranged in the same cabinet body, and compared with a mode that a power distribution box and a master control box are separately arranged, the arrangement reduces space occupation; meanwhile, compared with the mode that the distribution box and the master control box are arranged separately, the arrangement enables the shape of the electrical box to be more regular, thereby being more beneficial to arrangement, reducing negative effects on arrangement of other structures in the electrical bin, and improving the space utilization rate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage, and particularly relates to an energy storage device, an electrical cabinet, an energy storage system and a charging network. BACKGROUND

[0002] In the energy storage device, a distribution cabinet and a general control cabinet are usually arranged. The distribution cabinet is mainly used for distributing the output or input electric energy of the energy storage device, and plays a role of on-off control and protection; the general control cabinet is mainly used for monitoring the state of the battery device and other devices in the energy storage device, and plays a role of management and decision.

[0003] In the current energy storage device, the distribution cabinet and the general control cabinet are usually two mutually independent cabinets, and the volumes of the two are usually different, which leads to a large space occupation of the distribution cabinet and the general control cabinet, and the space occupied by the distribution cabinet and the general control cabinet is a special-shaped space, so that the space on the side of the two is difficult to be effectively utilized, and thus the space utilization rate of the energy storage device is low. CONTENT OF THE INVENTION

[0004] In view of the above problems, the application provides an energy storage device, an electrical cabinet, an energy storage system and a charging network, which can alleviate the problems of large space occupation and low space utilization rate of the distribution cabinet and the general control cabinet.

[0005] In a first aspect, some embodiments of the application provide an energy storage device, comprising:

[0006] a cabinet body having an electrical compartment and a battery compartment; a battery device accommodated in the battery compartment; an electrical cabinet accommodated in the electrical compartment, the electrical cabinet comprising a cabinet body, the cabinet body being provided with a general control assembly and a distribution assembly, the general control assembly comprising a battery management unit, and at least two different inner walls of the cabinet body being respectively provided with part of the general control assembly and / or the distribution assembly.

[0007] In the technical scheme of the embodiment, the distribution assembly and the general control assembly are arranged in the same cabinet body, which reduces the space occupation compared with the separate arrangement of the distribution cabinet and the general control cabinet; at the same time, the arrangement can also make the shape of the electrical cabinet more regular compared with the separate arrangement of the distribution cabinet and the general control cabinet, so as to be more conducive to arrangement and to reduce the negative impact on the arrangement of other structures in the electrical compartment, thereby improving the space utilization rate.

[0008] In some embodiments, the cabinet body comprises a cabinet body main body having an open accommodating space at one end, the general control assembly and the distribution assembly are both accommodated in the accommodating space, and different structures in the general control assembly are arranged on different wall surfaces of the accommodating space; the cabinet body further comprises a cabinet door connected to the cabinet body main body, and the cabinet door covers the opening.

[0009] In the technical solution of this embodiment, different structures in the main control component are arranged on different walls of the main body of the cabinet to make full use of the cabinet's storage space and facilitate better installation of the various structural components of the main control component.

[0010] In some embodiments, the cabinet body includes a first wall, two second walls and two third walls. The first wall is opposite to the cabinet door along a first direction. The two second walls are respectively located at opposite ends of the first wall along a second direction. The two third walls are respectively located at opposite ends of the first wall along a third direction. The two third walls and the two second walls are connected end to end in sequence, and the first direction, the second direction and the third direction are perpendicular to each other. The first wall, the second wall and the third wall are respectively provided with at least a portion of the main control component and / or at least a portion of the power distribution component.

[0011] The technical solution of this embodiment provides some specific ways to install the main control components, so that the main body of the cabinet includes a first wall, a second wall and a third wall, and different structures in the power distribution components and / or main control components are located on the first wall, the second wall and the third wall respectively, so as to disperse the installation of the various structures of the power distribution components and / or main control components, make reasonable use of the inner wall surface of the main body of the cabinet, and make full use of the accommodating space of the main body of the cabinet.

[0012] In some embodiments, the battery management unit is located on the second wall.

[0013] In this embodiment, the battery management unit is placed on the second wall. Because the battery management unit is relatively large, this arrangement can reduce the interference of the power distribution components on the first wall on the arrangement of the battery management unit, thus facilitating the installation of the battery management unit.

[0014] In some embodiments, the main control assembly further includes a first detection module, which is disposed on the same second wall as the battery management unit; and / or, the main control assembly further includes a second detection module, which is disposed on a third wall.

[0015] The technical solution of this embodiment provides a specific structure for some main control components, which include a battery management unit and a first detection module. The battery management unit and the first detection module are set on the same second wall to facilitate monitoring of the battery device status. The second detection module is set on the third wall to make more reasonable use of the inner wall surface of the cabinet body and to make fuller use of the cabinet body's accommodating space.

[0016] In some embodiments, the master control assembly further includes a plug-in terminal disposed on the second wall, and the plug-in terminal and the battery management unit are respectively located on different second walls.

[0017] The technical solution of this embodiment provides a specific structure for some main control components, such that the main control components include a plug-in terminal, and the plug-in terminal is set on another second wall to facilitate the routing of the plug-in terminal and reduce the mutual interference between the routing of the plug-in terminal, the routing of the battery management unit and the routing of the first detection module.

[0018] In some embodiments, a boss is provided on the side of the cabinet body opposite to the first wall. The boss protrudes in a direction away from the first wall. The boss and the cabinet door are located on the same side of the cabinet body and are offset from each other. The boss is provided with a plug hole, and the plug hole corresponds to the plug end.

[0019] In the technical solution of this embodiment, a boss is provided, and a plug hole is provided on the boss, and the plug hole corresponds to the plug end, so that the plug end can be connected to other structures outside the cabinet; the boss is offset from the cabinet door, so that even if the cabinet door does not cover the boss, the interference of the cabinet door on the connection between the plug end and the external structure is reduced, and it is also convenient for the external structure to insert or remove the plug end.

[0020] In some embodiments, the boss portion is located below the cabinet door along the direction of gravity; the distance between the outer surface of the cabinet door and the first wall is greater than or equal to the distance between the outer surface of the boss portion and the first wall; and / or, a water-blocking portion is provided on the outer surface of the boss portion, and the water-blocking portion is provided on the side of the boss portion near the cabinet door.

[0021] In this embodiment, the protrusion is positioned below the cabinet door, and the distance between the outer surface of the protrusion and the first wall is less than or equal to the distance between the outer surface of the cabinet door and the first wall. This makes it difficult for condensate left along the cabinet door to accumulate on the protrusion, thereby reducing the risk of condensate flowing to the connector and causing damage to the connector, as well as reducing the risk of condensate entering the cabinet interior. A water-blocking part is provided to prevent condensate from flowing along the cabinet door to the protrusion, thereby reducing the risk of condensate accumulating on the protrusion, and further reducing the risk of condensate flowing to the connector and causing damage to the connector, as well as reducing the risk of condensate entering the cabinet interior.

[0022] In some embodiments, the power distribution assembly includes a fuse located on the third wall.

[0023] In this embodiment, the power distribution component includes a fuse, which is placed on the third wall. Since fuses are usually long and occupy a lot of space, the fuse is placed separately on the third wall to reduce the interference of the fuse on the arrangement of other structures, make full use of the cabinet's main body space, and improve the utilization rate of the space.

[0024] In some embodiments, the fuse and the second detection module are respectively located on different third walls.

[0025] In the technical solution of this embodiment, the fuse and the second detection module are placed on different third walls to reduce the mutual interference between the arrangement of the fuse and the third detection module, and also to leave space on the third wall to install other smaller structural components.

[0026] In some embodiments, the electrical box further includes a ventilation structure disposed on a third wall.

[0027] In the technical solution of this embodiment, a ventilation structure is provided to facilitate heat exchange between the cabinet's storage space and the environment outside the cabinet, thereby making it easier to control the internal temperature of the cabinet; the ventilation structure is set on the third wall to make full use of the space of the third wall and improve the utilization rate of the storage space.

[0028] In some embodiments, the ventilation structure includes a fan and / or vents.

[0029] The technical solution of this embodiment provides some specific structures for ventilation structures, such that the ventilation structure includes a fan to facilitate gas exchange between the accommodating space and the space outside the cabinet, thereby facilitating better control of the temperature inside the cabinet; the ventilation structure also includes through holes, which can reduce manufacturing, use and maintenance costs when the accommodating space can exchange gases with the space outside the cabinet.

[0030] In some embodiments, a portion of the structure of the main control component and a portion of the structure of the power distribution component are located on the inner surface of the cabinet door.

[0031] In the technical solution of this embodiment, part of the structure of the main control component and part of the power distribution component are set on the inner surface of the cabinet door, which makes more reasonable use of the inner wall surface of the cabinet and makes fuller use of the cabinet's storage space.

[0032] In some embodiments, the master control assembly includes a display disposed on the inner surface of the cabinet door; and / or the power distribution assembly includes at least one of a relay and an energy meter disposed on the inner surface of the cabinet door.

[0033] The technical solution of this embodiment provides specific components for some main control components and some power distribution components installed on the cabinet door, making reasonable use of the inner wall surface of the cabinet and making full use of the cabinet's storage space.

[0034] In some embodiments, the power distribution assembly includes at least one of a terminal block, a current transformer, a circuit breaker, an emergency stop switch, a surge protector, a current converter, and an automatic transfer switch.

[0035] The technical solution of this embodiment provides some specific components of the power distribution components, so that the power distribution components can better distribute the power of the energy storage device and better play the role of on / off control and protection.

[0036] In some embodiments, the energy storage device further includes a heat exchange component disposed within the electrical compartment. The heat exchange component is used to control the temperature of the battery compartment and is located above the electrical compartment along the height direction of the enclosure.

[0037] In this embodiment, a heat exchange component is provided to control the temperature inside the battery compartment. The heat exchange component is placed inside the electrical compartment to reduce its space occupation within the battery compartment and to minimize the negative impact of its placement on energy density. The heat exchange component is placed above the electrical box to facilitate its connection with structures such as heat exchange medium pipelines within the battery compartment.

[0038] Secondly, embodiments of this application also provide an electrical box, including a cabinet, the cabinet containing a central control component and a power distribution component, the central control component including a battery management unit.

[0039] In this embodiment, the power distribution components and the main control components are housed in the same cabinet, reducing the space occupied by the electrical box. At the same time, this arrangement also makes the shape of the electrical box more regular, which is more conducive to the layout and can reduce the negative impact on the layout of other structures in the electrical compartment, thereby improving the space utilization rate.

[0040] Thirdly, embodiments of this application also provide an energy storage system, including an energy storage device provided in some embodiments of the first aspect; and a power conversion device connected to the energy storage device to perform power conversion on the current input to the energy storage device or output from the energy storage device.

[0041] Fourthly, embodiments of this application also provide a charging network, including a charging pile and an energy storage device provided in some embodiments of the first aspect or an energy storage system provided in some embodiments of the second aspect, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0042] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0043] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0044] Figure 1 A perspective view of an energy storage device provided in some embodiments of this application;

[0045] Figure 2 A perspective view of an energy storage device with the electrical compartment door removed, provided in some embodiments of this application;

[0046] Figure 3 This is a front view schematic diagram of an electrical box provided in some embodiments of this application;

[0047] Figure 4 This is a front view of an electrical box after the cabinet door has been removed, provided in some embodiments of this application;

[0048] Figure 5 for Figure 3 Cross-sectional view at line AA;

[0049] Figure 6 for Figure 3 Cross-sectional view at the middle BB line;

[0050] Figure 7 for Figure 3 Cross-sectional view at the CC line;

[0051] Figure 8 for Figure 3 Cross-sectional view at the DD line;

[0052] Figure 9 A side view of an electrical box provided for some embodiments of this application;

[0053] Figure 10 A schematic diagram of the inner side of a cabinet door provided for some embodiments of this application;

[0054] Figure 11 This application provides schematic diagrams of the structure of an energy storage system according to some embodiments.

[0055] Figure 12 This is a schematic diagram of the structure of a charging network provided in some embodiments of this application.

[0056] The markings in the diagram mean:

[0057] 100. Energy storage devices;

[0058] 10. Housing; 11. Electrical compartment; 12. Battery compartment;

[0059] 20. Battery device;

[0060] 30. Electrical box; 31. Cabinet; 311. Cabinet body; 3111. First wall; 3112. Second wall; 3113. Third wall; 3114. Boss; 312. Cabinet door; 32. Main control assembly; 321. Battery management unit; 322. First detection module; 323. Second detection module; 324. Plug-in terminal; 325. Display; 34. Power distribution assembly; 341. Fuse; 342. Terminal block; 343. Current transformer; 344. Circuit breaker; 345. Emergency stop switch; 346. Surge protector; 347. Current converter; 348. Automatic transfer switch; 349. Relay; 3410. Energy meter; 35. Ventilation structure; 351. Fan; 352. Ventilation hole;

[0061] 40. Heat exchange components;

[0062] 200. Power conversion device;

[0063] 300. Power generation equipment;

[0064] 400, charging stations;

[0065] 500. Connector. Detailed Implementation

[0066] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0068] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0069] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0070] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0071] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0072] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0073] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0074] An energy storage device is an integrated battery unit and control cabinet. The control cabinet and battery unit are coupled together to manage the battery unit and utilize the conversion between electrical energy and chemical energy to store and output electrical energy. The battery unit can serve as a backup power source, perform peak shaving and valley filling when the power system supply is uneven, regulate frequency when the power system load or power generation is high, or be applied in photovoltaic-storage power generation systems.

[0075] In energy storage devices, due to the large number of battery units, it is usually necessary to set up various monitoring devices to monitor the status of each sensor, and also to control the input status, output status or other status of each battery unit. Therefore, energy storage devices are usually equipped with a central control box to obtain the information collected by each monitoring device and control the input and output status of the battery units.

[0076] Energy storage devices are usually equipped with a distribution box to distribute and process the electrical energy stored in each battery device; at the same time, if some battery devices or circuits in the energy storage device malfunction, the distribution box can also cut off the corresponding circuit, thereby playing a protective role.

[0077] In current energy storage devices, the distribution box and the main control box are usually two independent cabinets with different volumes. This results in a large space occupation for the distribution box and the main control box. Furthermore, the space occupied by the distribution box and the main control box is irregularly shaped, making it difficult to effectively utilize the surrounding space, which in turn leads to a low space utilization rate of the energy storage device.

[0078] Based on the above considerations, in order to alleviate the problem of large space occupation and low space utilization of distribution boxes and main control boxes, this application provides an energy storage device. An electrical box is provided, housing both the main control components and the power distribution components. That is, the main control components and power distribution components are housed in the same cabinet. Compared to separate distribution boxes and main control boxes, this arrangement reduces space occupation. Simultaneously, this arrangement allows for a more regular shape of the electrical box, which is more conducive to layout and reduces the negative impact on the layout of other structures within the electrical compartment, thus improving space utilization.

[0079] The energy storage device disclosed in this application can be used in the industrial field, such as for balancing loads and reducing peak-valley differences; it can also be used in commercial complexes to achieve peak shaving and valley filling and intelligent management of electricity, etc.

[0080] For ease of explanation, the following embodiments will be described using a containerized energy storage device 100 as an example from one embodiment of this application.

[0081] refer to Figure 1 This application provides an energy storage device 100, including one or more battery clusters to increase the voltage and capacity of the energy storage device 100. The battery cluster may include multiple battery devices 20, which are connected in series via a busbar to increase the voltage of the energy storage device 100. When the energy storage device 100 includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device 100.

[0082] The energy storage device 100 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 100 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 100 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the use of the energy storage device 100.

[0083] In some embodiments, the energy storage device 100 is an energy storage container or an energy storage cabinet.

[0084] In some embodiments, the energy storage device 100 may include a housing 10 and one or more battery clusters, the battery clusters being housed in the housing 10.

[0085] In some embodiments, the energy storage device 100 may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0086] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 20 via piping to regulate the temperature of the individual battery cells.

[0087] As an example, the main control module can serve as the battery management unit 321 for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For example, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0088] As an example, the central control module can serve as the battery management unit 321 of the energy storage device 100, used to monitor and manage the energy storage device 100. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device 100. For example, it can control the charging and discharging current and voltage of the energy storage device 100. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0089] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0090] As an example, the power distribution module can be used to distribute power to the modules in the energy storage device 100 that require electricity.

[0091] refer to Figures 2 to 5 In a first aspect, embodiments of this application provide an energy storage device 100, including a housing 10, a battery device 20, and an electrical box 30. The housing 10 has an electrical compartment 11 and a battery compartment 12; the battery device 20 is housed in the battery compartment 12; the electrical box 30 is housed in the electrical compartment 11, and the electrical box 30 includes a cabinet 31. The cabinet 31 houses a central control assembly 32 and a power distribution assembly 34. The central control assembly 32 includes a battery management unit 321. At least two different inner walls of the cabinet 31 are respectively provided with portions of the central control assembly 32 and / or the power distribution assembly 34.

[0092] In the figure, the X-axis is the length direction of the energy storage device 100 and the thickness direction of the electrical box 30; the Y-axis is the width direction of the energy storage device 100 and the width direction of the electrical box 30; and the Z-axis is the height direction of the energy storage device 100 and the height direction of the electrical box 30.

[0093] The enclosure 10 refers to the structure in the energy storage device 100 that provides an installation base for the battery device 20 and other structures. The enclosure 10 can be used to house the battery device 20 and other structures (such as thermal management modules, main control modules, etc.). The enclosure 10 may include a container or other structures. The shape of the enclosure 10 may be prismatic, cylindrical, or other shapes. The material of the enclosure 10 may include metal, plastic, or other materials.

[0094] The electrical compartment 11 refers to the spatial structure within the housing 10 used to house the electrical box 30, control panel, and other devices. The electrical compartment 11 can be a prismatic spatial structure, a cylindrical spatial structure, or a spatial structure of other shapes. The electrical compartment 11 is located at one end of the housing 10 along the length X of the energy storage device 100, or it can be located at other positions within the housing 10. The electrical compartment 11 can be formed by partitions within the housing 10, and the electrical compartment 11 can also be a spatial structure set within the housing 10.

[0095] The battery compartment 12 refers to the spatial structure within the housing 10 used to house the battery device 20. The battery compartment 12 can also house sensors, fire-fighting devices, or other structural components for monitoring the status of the battery device 20. The battery compartment 12 can be a prismatic spatial structure, a cylindrical spatial structure, or a spatial structure of other shapes. The battery compartment 12 can be formed by partitions within the housing 10, and the battery compartment 12 can also be a spatial structure set within the housing 10.

[0096] It is understandable that, in addition to the electrical compartment 11 and the battery compartment 12, the housing 10 may also include other spatial structures.

[0097] Battery device 20 refers to the device in energy storage device 100 used for storing and releasing electrical energy. The number of battery devices 20 can be one, two, or more. Battery device 20 may include one or more battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel connections. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the multiple battery cells is housed within cabinet 31. Alternatively, battery device 20 can also consist of multiple battery cells first connected in series, parallel, or a combination thereof to form battery modules, and then multiple battery modules connected in series, parallel, or a combination thereof to form a whole. Battery device 20 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells.

[0098] Each battery cell can be a rechargeable battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell can be cylindrical, flat, cuboid, or other shapes.

[0099] The electrical box 30 refers to the electrical structure in the energy storage device 100 used to distribute the electrical energy of each battery device 20, monitor and manage the status of each battery device 20, and provide control and protection for each battery device 20 and its corresponding circuit. The electrical box 30 includes a main control component 32 and a power distribution component 34.

[0100] Cabinet 31 refers to the structure in electrical box 30 that provides an installation base for main control component 32, power distribution component 34 or other structures. Cabinet 31 can form the internal environment of electrical box 30, and the internal environment formed by cabinet 31 can accommodate main control component 32, power distribution component 34 or other structural components of electrical box 30. Cabinet 31 can be a prismatic structure, a cylindrical structure or other shapes. Cabinet 31 can be directly connected to the inner wall of box 10, or it can be indirectly connected to box 10 through an intermediate structure. The material of cabinet 31 can include metal, plastic or other materials.

[0101] The central control assembly 32 refers to the combination of electronic devices in the electrical box 30 used to monitor, control, and manage the status of each battery device 20. The central control assembly 32 may include a battery management unit (BMU), which is used to acquire status information of the battery device 20 or battery cell assembly or battery cell, and to balance the voltage of each battery device 20 or battery cell assembly or battery cell. The battery management unit 321 can also be used to protect the battery device 20 or battery cell assembly or battery cell and transmit status information. The central control assembly 32 may also include an insulation monitoring module (IMM) to monitor the insulation performance of the battery device 20 or battery cell assembly or battery cell. It is understood that the central control assembly 32 may also include other devices, and is not limited to the battery management unit 321 and the insulation monitoring module.

[0102] The power distribution assembly 34 refers to the combination of electronic devices in the electrical box 30 used to distribute the electrical energy input or output of each battery device 20, control the circuit through holes and safety status; the power distribution assembly 34 may include devices such as fuses 341, relays 349, surge protectors 346, and automatic switches.

[0103] The inner wall of cabinet 31 refers to the wall surface of cabinet 31 facing inward. Depending on the shape of cabinet 31, cabinet 31 may have multiple inner walls, and these multiple inner walls may have different orientations; the shapes of these multiple inner walls may be the same or different.

[0104] The cabinet 31 may have at least two different inner walls on which the main control component 32 and / or the power distribution component 34 are respectively provided. It is possible to have only the portion of the main control component 32 on the at least two different inner walls of the cabinet 31, or only the portion of the power distribution component 34 on the at least two different inner walls of the cabinet 31, or both the portion of the main control component 32 and the portion of the power distribution component 34 on the at least two different inner walls. The cabinet 31 may have only two different inner walls on which the main control component 32 and / or the power distribution component 34 are provided, or it may have three or more inner walls on which the main control component 32 and / or the power distribution component 34 are provided.

[0105] At least two different inner walls of the cabinet 31 are respectively provided with portions of the main control assembly 32 and / or the power distribution assembly 34. That is, at least one of the main control assembly 32 and the power distribution assembly 34 can be divided into two or more parts and arranged on different inner walls of the cabinet 31 to make full use of the internal space of the cabinet 31.

[0106] For example, if the portions of the main control assembly 32 are respectively located on at least two different inner walls of the cabinet 31, the main control assembly 32 may have two portions, which are respectively located on two different inner walls of the cabinet 31; the main control assembly 32 may also have three or more portions, which are respectively located on two different inner walls of the cabinet 31.

[0107] For example, if parts of the main control assembly 32 are respectively located on at least two different inner walls of the cabinet 31, parts of the main control assembly 32 may be located on only two different inner walls of the cabinet 31, or they may be located on three or more different inner walls of the cabinet 31.

[0108] At least two different inner walls of the cabinet 31 are respectively provided with portions of the main control assembly 32 and / or the power distribution assembly 34, so that the arrangement of the main control assembly 32 and the power distribution assembly 34 can make fuller use of the space inside the cabinet 31, improve the utilization rate of the internal space of the cabinet 31, and facilitate the reduction of the overall volume of the cabinet 31.

[0109] Compared to the traditional energy storage device 100 where the distribution box and the main control box are set up separately, this embodiment sets up the main control component 32 and the supporting components in the same cabinet 31, which reduces the space occupation.

[0110] Because the distribution box and main control box in a traditional energy storage device 100 typically have different volumes, there are often small and irregularly shaped spaces that are difficult to utilize between or around them, resulting in low space utilization of the electrical compartment 11. Therefore, in this embodiment, the main control component 32 and the cooperating components are both housed within the same cabinet 31. The cabinet 31 can then be configured with a regular shape, such as a cuboid structure, optimizing the space occupied by the electrical box 30 and reducing the irregularly shaped spaces around it. This facilitates the arrangement of other structures within the electrical compartment 11 and improves its space utilization.

[0111] In this embodiment, the power distribution component 34 and the main control component 32 are placed in the same cabinet 31. Compared with the separate placement of the power distribution box and the main control box, this arrangement reduces the space occupation. At the same time, compared with the separate placement of the power distribution box and the main control box, this arrangement can also make the shape of the electrical box 30 more regular, which is more conducive to the layout and can reduce the negative impact on the layout of other structures in the electrical compartment 11, thus improving the space utilization rate.

[0112] refer to Figures 3 to 8In some embodiments, the cabinet 31 includes a cabinet body 311, which has an accommodating space with an opening at one end. The main control component 32 and the power distribution component 34 are both accommodated in the accommodating space, and different structures in the main control component 32 are respectively disposed on different walls of the accommodating space. The cabinet 31 also includes a cabinet door 312 connected to the cabinet body 311, which covers the opening.

[0113] The cabinet body 311 refers to the structure in the cabinet 31 that is mainly used to provide an installation base for other structures. The cabinet body 311 can be a prismatic structure, a cylindrical structure, or other structural components. The cabinet body 311 can be directly connected to the inner wall of the box 10. The cabinet body 311 can be connected to the inner wall of the box 10 by screwing, snapping, welding, or other means. The cabinet body 311 can also be indirectly connected to the box 10 through an intermediate structure. The material of the cabinet body 311 can include metal, plastic, or other materials.

[0114] The accommodating space refers to the spatial structure formed within the main body of the cabinet 311. The accommodating space can be a prism-shaped spatial structure, a cylindrical spatial structure, or a spatial structure of other shapes. The shape of the accommodating space can also be set according to the shape of the main body of the cabinet 311.

[0115] The receiving space has an opening so that the receiving space can be connected to the space outside the cabinet 31, and facilitates the installation of the various devices of the main control assembly 32 and the power distribution assembly 34 in the receiving space; the opening can be square, round or other shapes.

[0116] Cabinet door 312 refers to the structure in cabinet 31 used to enclose the storage space. Cabinet door 312 also provides an installation base for part of the structure of the main control component 32 and part of the structure of the power distribution component 34. Cabinet door 312 can cover the opening to close the opening and separate the storage space from the space outside cabinet 31. Cabinet door 312 can work with cabinet body 311 to form the internal environment of cabinet 31. Cabinet door 312 can be a square plate, a round plate, or other shaped structural component. The shape of cabinet door 312 can also be set according to the shape of the opening. Cabinet door 312 is connected to cabinet body 311. Cabinet door 312 can be detachably connected to cabinet body 311 by screwing, snap-fitting, or other means, or it can be movably connected to cabinet body 311 by pivoting, sliding, or other means. The material of cabinet door 312 can include metal, plastic, or other materials. The material of cabinet door 312 can be the same as or different from the material of cabinet body 311.

[0117] Both the main control component 32 and the power distribution component 34 are housed in the accommodating space. Different structures in the main control component 32 can be set on different walls of the accommodating space, that is, different structures in the main control component 32 can be set on different walls of the cabinet body 311 and cabinet doors 312. This arrangement can make full use of the structure and accommodating space of the cabinet 31, so that both the main control component 32 and the power distribution component 34 can be installed in the cabinet 31, thereby improving the utilization rate of the accommodating space.

[0118] In current distribution boxes and main control boxes, electronic devices are usually installed on the inner wall of the cabinet 31 opposite to the cabinet door 312, resulting in low space utilization inside the cabinet 31. Accordingly, in this embodiment, different structures in the main control component 32 are installed on different walls of the main body 311 to make full use of the cabinet body 311's accommodating space and facilitate better installation of the various structural components of the main control component 32.

[0119] refer to Figures 3 to 8 In some embodiments, the cabinet body 311 includes a first wall 3111, two second walls 3112 and two third walls 3113. The first wall 3111 is opposite to the cabinet door 312 along a first direction. The two second walls 3112 are respectively located at opposite ends of the first wall 3111 along a second direction. The two third walls 3113 are respectively located at opposite ends of the first wall 3111 along a third direction. The two third walls 3113 and the two second walls 3112 are connected end to end in sequence, and the first direction, the second direction and the third direction are perpendicular to each other. The first wall 3111, the second wall 3112 and the third wall 3113 are respectively provided with at least a part of the main control component 32 and / or at least a part of the power distribution component 34.

[0120] The first wall 3111 refers to a part of the structure of the cabinet body 311. The shape of the first wall 3111 can be square, round or other shapes. The shape of the first wall 3111 can also be set according to the shape of the cabinet body 311. The first wall 3111 is opposite to the cabinet door 312 along the first direction, that is, the first wall 3111 and the cabinet door 312 are located on opposite sides of the accommodating space along the first direction.

[0121] The first direction can be the thickness direction X of the electrical box 30, or it can be other directions; for example, the first wall 3111 and the cabinet door 312 can be arranged at intervals along the thickness direction X of the electrical box 30, and the accommodating space is located between the first wall 3111 and the cabinet door 312.

[0122] The second wall 3112 refers to the part of the cabinet body 311 that is connected to the first wall 3111. The shape of the second wall 3112 can be square, circular or other shapes. The shape of the second wall 3112 can also be set according to the shape of the cabinet body 311. There are two second walls 3112, which are respectively connected to the two opposite ends of the first wall 3111 along the second direction.

[0123] The second direction can be either the height direction Z of the electrical box 30 or the width direction Y of the electrical box 30; for example, the second direction is the height direction Z of the electrical box 30, and the two second walls 3112 are located at the two ends of the first wall 3111 along the height direction Z of the electrical box 30.

[0124] The third wall 3113 refers to the part of the cabinet body 311 that is connected to the first wall 3111. The shape of the third wall 3113 can be square, circular or other shapes. The shape of the third wall 3113 can also be set according to the shape of the cabinet body 311. There are two third walls 3113, which are respectively connected to the opposite ends of the first wall 3111 along a third direction.

[0125] The third direction can be either the width direction Y of the electrical box 30 or the height direction Z of the electrical box 30; for example, the third direction is the width direction Y of the electrical box 30, and the two third walls 3113 are located at the two ends of the first wall 3111 along the width direction Y of the electrical box 30.

[0126] The first wall 3111, the second wall 3112, and the third wall 3113 are each provided with at least a portion of the power distribution component 34. That is, at least a portion of the structure of the power distribution component 34 is provided in the first wall 3111, the second wall 3112, and the third wall 3113. The power distribution component 34 can be completely provided in the first wall 3111, the second wall 3112, and the third wall 3113, or only a portion of the structure can be provided in the first wall 3111, the second wall 3112, and the third wall 3113, and the other parts of the power distribution component 34 can be provided in other positions of the cabinet body 311 or the cabinet door 312.

[0127] The first wall 3111, the second wall 3112, and the third wall 3113 are each provided with at least a portion of the main control component 32. That is, at least a portion of the structure of the main control component 32 is provided on the first wall 3111, the second wall 3112, and the third wall 3113. The main control component 32 may be provided only on the first wall 3111, the second wall 3112, and the third wall 3113, or only a portion of the structure may be provided on the first wall 3111, the second wall 3112, and the third wall 3113, with the other structures provided at other locations on the main body of the cabinet 311 or on the cabinet door 312.

[0128] Different structures of the power distribution component 34 or the main control component 32 can be respectively set on the first wall 3111, the second wall 3112 and the third wall 3113, or different structures of the power distribution component 34 and the main control component 32 can be respectively set on the first wall 3111, the second wall 3112 and the third wall 3113.

[0129] For example, part of the structure of the power distribution component 34 is set on the first wall 3111, and different structures of the main control component 32 are respectively set on the first wall 3111, the second wall 3112, the third wall 3113 and other parts of the cabinet 31. Since the first wall 3111 is opposite to the cabinet door 312, the first wall 3111 is the wall with a larger area in the main body of the cabinet 311. Since there are usually many electronic devices in the paired components, the first wall 3111 is mainly used as the installation base of the power distribution component 34 to provide sufficient installation space for the large number of electronic devices in the power distribution component 34.

[0130] This embodiment provides some specific ways of installing the main control component 32, so that the cabinet body 311 includes a first wall 3111, a second wall 3112 and a third wall 3113, and different structures in the power distribution component 34 and / or the main control component 32 are respectively located on the first wall 3111, the second wall 3112 and the third wall 3113, so as to disperse the installation of the various structures of the power distribution component 34 and / or the main control component 32, make reasonable use of the inner wall surface of the cabinet body 311, and make full use of the accommodating space of the cabinet body 311.

[0131] refer to Figures 3 to 8 In some embodiments, the battery management unit 321 is located on the second wall 3112.

[0132] The battery management unit 321 is disposed on a second wall 3112. The battery management unit 321 can be directly connected to the corresponding second wall 3112, or it can be indirectly connected to the corresponding second wall 3112 through an intermediate structure. When the battery management unit 321 is connected to the corresponding second wall 3112 through the intermediate structure, the battery management unit 321 can be in a suspended state through the intermediate structure. The battery management unit 321 can be connected to the corresponding second wall 3112 by screwing, snapping, bonding, welding or other means.

[0133] Because the battery management unit 321 is relatively large, it is placed on the second wall 3112 so that the battery management unit 321 is staggered from some of the power distribution components 34 on the first wall 3111, thereby reducing mutual interference between the two during assembly.

[0134] In this embodiment, the battery management unit 321 is disposed on the second wall 3112. Since the battery management unit 321 is relatively large, this arrangement can reduce the interference of the power distribution components 34 of the first wall 3111 on the arrangement of the battery management unit 321, so as to facilitate the installation of the battery management unit 321.

[0135] refer to Figure 3 , Figure 5 In some embodiments, the main control component 32 further includes a first detection module 322, which and the battery management unit 321 are disposed on the same second wall 3112; and / or, the main control component 32 further includes a second detection module 323, which is disposed on a third wall 3113.

[0136] The first detection module 322 refers to the device in the main control assembly 32 used to monitor the insulation performance of the battery device 20 or battery cell assembly or battery cell. The first detection module 322 may include an insulation monitoring module (IMM).

[0137] The first detection module 322 and the battery management unit 321 are disposed on the second wall 3112. The first detection module 322 and the battery management unit 321 can be disposed on the second wall 3112 by snap-fit, screw-fit, adhesive, welding or other means.

[0138] The first detection module 322 and the battery management unit 321 are located on the same second wall 3112. Since the first detection module 322 and the battery management unit 321 are both relatively large, they are located on the same second wall 3112 to make full use of the space of the second wall 3112. It can be understood that when the first detection module 322 and the battery management unit 321 are located on the same second wall 3112, the second wall 3112 does not need to be provided with any other structure.

[0139] For example, the two second walls 3112 are located at the upper and lower ends of the first wall 3111 along the height direction Z of the electrical box 30. At this time, the first detection module 322 and the battery management unit 321 are located on the second wall 3112 located on the side of the first wall 3111, so that the battery management unit 321 can obtain the status information of each battery device 20.

[0140] The second detection module 323 refers to the device in the main control assembly 32 used to monitor the insulation performance of the battery device 20 or battery cell assembly or battery cell. The second detection module 323 may include an insulation monitoring module (IMM).

[0141] The second detection module 323 is disposed on the third wall 3113. The second detection module 323 can be disposed on the third wall 3113 by snap-fit, screw-fit, adhesive, welding or other means.

[0142] Since the second detection module 323 is relatively large, it is placed on the third wall 3113 to reduce the mutual interference between the second detection module 323 and some of the power distribution components 34 on the first wall 3111. It can also reduce the mutual interference between the second detection module 323 and the first detection module 322, and between the second detection module 323 and the battery management unit 321.

[0143] This embodiment provides a specific structure for the overall control component 32, which includes a battery management unit 321 and a first detection module 322. The battery management unit 321 and the first detection module 322 are arranged on the same second wall 3112 to facilitate monitoring of the status of the battery device 20. The second detection module 323 of the overall control component 32 is arranged on the third wall 3113 to make more reasonable use of the inner wall surface of the cabinet body 311 and to make fuller use of the accommodating space of the cabinet body 311.

[0144] refer to Figure 3 , Figure 6 In some embodiments, the main control assembly 32 further includes a plug-in terminal 324, which is disposed on the second wall 3112, and the plug-in terminal 324 and the battery management unit 321 are respectively located on different second walls 3112.

[0145] The plug terminal 324 refers to the structure in the main control assembly 32 used to connect to other structures besides the electrical box 30. The plug terminal 324 may include a plug or a socket. The number of plug terminals 324 may be one, two or more. When there are two or more plug terminals 324, multiple plug terminals 324 can be connected to different structures of the main control assembly 32 to transmit different information.

[0146] The plug end 324 is located on the second wall 3112 and can be connected to the second wall 3112 by snap-fit, screw-fit, adhesive, welding or other means.

[0147] The connector 324 and the battery management unit 321 are located on different second walls 3112. Since the battery management unit 321 and the first detection module 322 are located on the same second wall 3112, the connector 324 and the first detection module 322 are also located on different second walls 3112. Since the battery management unit 321 and the first detection module 322 are located on the same second wall 3112, the connector 324 is placed on another second wall 3112 to reduce mutual interference between the wiring of the connector 324, the wiring of the battery management unit 321, and the wiring of the first detection module 322.

[0148] For example, two second walls 3112 are located at the upper and lower ends of the first wall 3111 along the height direction Z of the electrical box 30. The first detection module 322 and the battery management unit 321 are located on the second wall 3112 located to the side of the first wall 3111. At this time, the plug-in terminal 324 is located on the second wall 3112 below the first wall 3111, that is, the plug-in terminal 324 is located at the bottom of the cabinet body 311.

[0149] This embodiment provides a specific structure of the overall control component 32, which includes a plug-in terminal 324 and places the plug-in terminal 324 on another second wall 3112 to facilitate the routing of the plug-in terminal 324 and reduce mutual interference between the routing of the plug-in terminal 324, the routing of the battery management unit 321 and the routing of the first detection module 322.

[0150] refer to Figure 3 , Figure 9 In some embodiments, a boss 3114 is provided on the side of the cabinet body 311 opposite to the first wall 3111. The boss 3114 protrudes in a direction away from the first wall 3111. The boss 3114 and the cabinet door 312 are located on the same side of the cabinet body 311 and are offset from each other. The boss 3114 is provided with a plug hole, which corresponds to the plug end 324.

[0151] The protrusion 3114 refers to the structure in the main body of the cabinet 311 that protrudes away from the accommodating space. The protrusion 3114 protrudes away from the first wall 3111, that is, the protrusion 3114 protrudes towards the cabinet door 312. The protrusion 3114 is located on the side of the main body of the cabinet 311 with the cabinet door 312, that is, the protrusion 3114 and the first wall 3111 are located on opposite sides of the accommodating space.

[0152] The boss portion 3114 is provided with a plug hole, which is opposite to the plug end 324. That is, the plug end 324 can be connected to other devices outside the cabinet 31 through the plug hole. The plug hole can be a straight hole, a tapered hole, a stepped hole, or other shaped hole structure. The plug hole can be a square hole, a round hole, or other shaped hole structure. The shape of the plug hole can also be set according to the shape of the plug end 324. The number of plug holes can be the same as the number of plug ends 324, or they can be different.

[0153] Since the insertion hole on the boss portion 3114 corresponds to the insertion end 324, that is, the boss portion 3114 is adjacent to the second wall 3112 where the insertion end 324 is located; for example, when the second wall 3112 where the insertion end 324 is located is located below the first wall 3111 along the height direction Z of the electrical box 30, the boss portion 3114 is also located at the lower part of the cabinet body 311.

[0154] The boss portion 3114 is offset from the cabinet door 312, meaning that the cabinet door 312 does not cover the boss portion 3114. This arrangement allows the plug-in terminal 324 to connect to other devices outside the cabinet body 31 without having to cross the cabinet door 312. The plug-in terminal 324 can be connected to other devices outside the cabinet body 31 without opening the cabinet door 312, thereby simplifying the operation process of the plug-in terminal 324 and reducing the negative impact of the connection of the plug-in terminal 324 on the sealing performance of the cabinet door 312.

[0155] In this embodiment, a boss portion 3114 is provided, and a plug hole is provided on the boss portion 3114, and the plug hole corresponds to the plug end 324 so that the plug end 324 can be connected to other structures outside the cabinet 31; the boss portion 3114 is offset from the cabinet door 312, so that even if the cabinet door 312 does not cover the boss portion 3114, the interference of the cabinet door 312 on the connection between the plug end 324 and the external structure is reduced, and it is also convenient for the external structure to insert or remove the plug end 324.

[0156] refer to Figure 3 , Figure 9 In some embodiments, the boss portion 3114 is located below the cabinet door 312 along the direction of gravity; the distance between the outer surface of the cabinet door 312 and the first wall 3111 is greater than or equal to the distance between the outer surface of the boss portion 3114 and the first wall 3111; and / or, a water-blocking portion is provided on the outer surface of the boss portion 3114, and the water-blocking portion is provided on the side of the boss portion 3114 near the cabinet door 312.

[0157] The boss portion 3114 is located below the cabinet door 312 along the direction of gravity. Since the boss portion 3114 is offset from the cabinet door 312 and protrudes out of the receiving space, the boss portion 3114 can also be used to support the cabinet door 312.

[0158] The outer surface of cabinet door 312 refers to the surface of cabinet door 312 facing away from cabinet body 31. The distance between the outer surface of cabinet door 312 and the first wall 3111 is... Figure 9 The dimension shown in L2 indicates that the distance between the outer surface of the cabinet door 312 and the first wall 3111 can refer to the distance between the outer surface of the cabinet door 312 and the inner surface of the first wall 3111, or it can refer to the distance between the outer surface of the cabinet door 312 and the outer surface of the first wall 3111. The inner surface of the first wall 3111 refers to the surface of the first wall 3111 facing the accommodating space, and the outer surface of the first wall 3111 refers to the surface of the first wall 3111 facing away from the cabinet body 31.

[0159] The outer surface of the boss portion 3114 refers to the surface of the boss portion 3114 facing away from the cabinet body 31, and the distance between the outer surface of the boss portion 3114 and the first wall 3111 is... Figure 9The dimension shown in L1 indicates that the distance between the outer surface of the boss portion 3114 and the first wall 3111 can refer to the distance between the outer surface of the boss portion 3114 and the inner surface of the first wall 3111, or it can refer to the distance between the outer surface of the boss portion 3114 and the first wall 3111.

[0160] When the boss portion 3114 is located below the cabinet door 312 along the direction of gravity, the distance between the outer surface of the cabinet door 312 and the first wall 3111 reflects the size of the cabinet body 31 in the thickness direction X at the cabinet door 312, and the distance between the outer surface of the boss portion 3114 and the first wall 3111 reflects the size of the cabinet body 31 in the thickness direction X at the boss portion 3114; such that the distance between the outer surface of the cabinet door 312 and the first wall 3111 is greater than or equal to the distance between the outer surface of the boss portion 3114 and the first wall 3111, that is, the boss portion 3114 is located inside the outer surface of the cabinet door 312 in the thickness direction X of the cabinet body 31.

[0161] When the boss portion 3114 is located below the cabinet door 312 along the direction of gravity, there is a risk that the condensate formed on the cabinet door 312 may flow along the cabinet door 312 and onto the boss portion 3114. There is also a risk that the condensate may flow to the plug terminal 324 and cause a short circuit at the plug terminal 324, or that the condensate may accumulate and enter the boss portion 3114, causing a short circuit inside the electrical box 30.

[0162] Accordingly, the distance between the outer surface of the cabinet door 312 and the first wall 3111 is greater than or equal to the distance between the outer surface of the boss portion 3114 and the first wall 3111. This ensures that the condensate flowing downward along the cabinet door 312 can pass over the boss portion 3114 and fall directly down, and that the condensate is less likely to fall onto the boss portion 3114 or the plug end 324. This reduces the risk of damage to the plug end 324 caused by the condensate and also reduces the risk of condensate accumulating on the boss portion 3114.

[0163] For example, the distance between the outer surface of the cabinet door 312 and the outer surface of the boss portion 3114 can be less than the thickness of the cabinet door 312. This arrangement allows the boss portion 3114 to support the cabinet door 312 and also allows condensate to pass over the boss portion 3114, thereby reducing the risk of condensate causing damage to the plug end 324 and reducing the risk of condensate accumulating on the boss portion 3114.

[0164] The water-blocking part refers to the structure protruding from the outer surface of the boss part 3114. The outer surface of the boss part 3114 refers to the surface of the boss part 3114 facing the space outside the cabinet 31. The water-blocking part can be a strip structure, a plate structure, or other shapes. The water-blocking part is connected to the boss part 3114. The water-blocking part can be connected to the boss part 3114 by bonding, welding, screwing, or other means. The water-blocking part can also be integrally formed with the boss part 3114. The material of the water-blocking part can include metal, plastic, or other materials.

[0165] The water-blocking part is located on the side of the boss 3114 near the cabinet door 312. When condensate on the cabinet door 312 flows towards the boss 3114, the condensate can flow along the water-blocking part and pass over the boss 3114, thereby reducing the risk of condensate flowing to the plug end 324 and reducing the risk of condensate accumulating at the boss 3114 and causing condensate to seep into the cabinet body 31.

[0166] Understandably, when the boss portion 3114 is located below the cabinet door 312 in the direction of gravity, the distance between the outer surface of the boss portion 3114 and the first wall 3111 can be less than or equal to the distance between the outer surface of the cabinet door 312 and the first wall 3111, or only a water-blocking portion can be provided, or both can be provided at the same time.

[0167] In this embodiment, the boss portion 3114 is located below the cabinet door 312, and the distance between the outer surface of the boss portion 3114 and the first wall 3111 is less than or equal to the distance between the outer surface of the cabinet door 312 and the first wall 3111. This makes it difficult for condensate left along the cabinet door 312 to accumulate on the boss portion 3114, thereby reducing the risk of condensate flowing to the plug end 324 and causing damage to the plug end 324, and also reducing the risk of condensate entering the cabinet body 31.

[0168] In this embodiment, a water-blocking part is provided to prevent condensate from flowing along the cabinet door 312 to the boss part 3114, thereby reducing the risk of condensate accumulating on the boss part 3114, thus reducing the risk of condensate flowing to the plug end 324 and causing damage to the plug end 324, and also reducing the risk of condensate entering the cabinet body 31.

[0169] refer to Figure 3 , Figure 7 In some embodiments, the power distribution assembly 34 includes a fuse 341 disposed on the third wall 3113.

[0170] Fuse 341 refers to an electronic device in the power distribution assembly 34 used to provide overcurrent protection. In the event of an abnormality in the battery device 20 that causes an excessive fault current, fuse 341 can promptly melt and cut off the current in the corresponding circuit to prevent the fault from spreading. The number of fuses 341 can be one, two or more.

[0171] The fuse 341 is located on the third wall 3113. The fuse 341 can be connected to the third wall 3113 by bonding, screwing, snapping or other means. The fuse 341 can be located on the same third wall 3113 as the second detection module 323, or the fuse 341 and the second detection module 323 can be located on different third walls 3113.

[0172] Since the fuse 341 is usually large, its placement on the first wall 3111 can easily interfere with the arrangement of other structures in the power distribution assembly 34. Therefore, the fuse 341 is placed on the third wall 3113 to reduce interference with other structures in the power distribution assembly 34.

[0173] In this embodiment, the power distribution component 34 includes a fuse 341, and the fuse 341 is placed on the third wall 3113. Since the fuse 341 is usually long and occupies a lot of space, the fuse 341 is placed separately on the third wall 3113 to reduce the interference of the fuse 341 on the arrangement of other structures, make full use of the storage space of the cabinet body 311, and improve the utilization rate of the storage space.

[0174] refer to Figure 3 , Figure 7 , Figure 8 In some embodiments, the fuse 341 and the second detection module 323 are respectively located on different third walls 3113.

[0175] The fuse 341 and the second detection module 323 are located on two different third walls 3113. Since the fuse 341 and the second detection module 323 are both large in size, the fuse 341 and the second detection module 323 are respectively set on two different third walls 3113 to reduce mutual interference between their arrangement.

[0176] In this embodiment, the fuse 341 and the second detection module 323 are arranged on different third walls 3113 to reduce the mutual interference between the arrangement of the fuse 341 and the third detection module, and also to leave space in the third wall 3113 to install other smaller structural components.

[0177] refer to Figure 3 , Figures 7 to 9 In some embodiments, the electrical box 30 further includes a ventilation structure 35 disposed on the third wall 3113.

[0178] Ventilation structure 35 refers to the structure in electrical box 30 used for gas exchange between the storage space and the space outside cabinet 31. Ventilation structure 35 may include fan 351, or vents or other structures for gas exchange; ventilation structure 35 may include one gas exchange structure, or two or more gas exchange structures.

[0179] The ventilation structure 35 is located on the third wall 3113. The ventilation structure 35 can be located on only one third wall 3113, or the different structures in the ventilation structure 35 can be located on two different third walls 3113.

[0180] For example, when the fuse 341 and the second detection module 323 are located on two different third walls 3113, the ventilation structure 35 can be located on the third wall 3113 where the fuse 341 or the second detection module 323 is located, or the different structures in the ventilation structure 35 can be located on the two third walls 3113 respectively.

[0181] Because the electrical box 30 easily generates heat during the operation of the energy storage device 100, a ventilation structure 35 is provided to facilitate gas exchange between the storage space and the space outside the cabinet 31, thereby controlling the temperature within the storage space.

[0182] In this embodiment, a ventilation structure 35 is provided to facilitate heat exchange between the storage space of the cabinet 31 and the environment outside the cabinet 31, thereby making it easier to control the internal temperature of the cabinet 31; the ventilation structure 35 is set on the third wall 3113 to make full use of the space of the third wall 3113 and improve the utilization rate of the storage space.

[0183] refer to Figure 3 , Figures 7 to 9 In some embodiments, the ventilation structure 35 includes a fan 351 and / or a vent 352.

[0184] Fan 351 refers to a device in electrical box 30 used to facilitate the exchange of gas between the containment space and the space outside cabinet 31. Fan 351 can be used to blow outside air into the containment space or to exhaust air in the containment space to the outside. Fan 351 can be bladed, bladeless or other types of fans. There can be one, two or more fans. When there are two or more fans, each fan 351 can include an intake fan and an exhaust fan. When there are two or more fans, each fan 351 can be installed on two third walls 3113. Fan 351 is installed on the third wall 3113 and can be connected to the third wall 3113 by snap-fit, screw or other means.

[0185] For example, when both the power distribution assembly 34 and the main control assembly 32 are located within the housing space, the fan 351 is also located within the housing space.

[0186] Ventilation hole 352 refers to the hole structure provided in the third wall 3113. Ventilation hole 352 is provided through the third wall 3113 so that the accommodating space can exchange air with the space outside the cabinet 31 through the ventilation hole 352. Ventilation hole 352 can be a square hole, a round hole or other shape hole structure. Ventilation hole 352 can be a straight hole, a stepped hole, a conical hole or other shape hole structure. The number of ventilation holes 352 can be one, two or more. When there are two or more ventilation holes 352, each ventilation hole 352 can be provided in two different third walls 3113.

[0187] The ventilation structure 35 may include only the ventilation hole 352 and the fan 351, or it may include both the fan 351 and the ventilation hole 352.

[0188] For example, the ventilation structure 35 includes a fan 351 and a ventilation hole 352, with the ventilation hole 352 and the fan 351 respectively disposed on different third walls 3113; for example, the fan 351 and the second detection module 323 are disposed on the same third wall 3113, and the ventilation hole 352 and the fuse 341 are disposed on the same third wall 3113.

[0189] This embodiment provides some specific structures for the ventilation structure 35, such that the ventilation structure 35 includes a fan 351 to facilitate gas exchange between the accommodating space and the space outside the cabinet 31, thereby facilitating better control of the temperature inside the cabinet 31; the ventilation structure 35 includes through holes, and when the accommodating space can exchange gas with the space outside the cabinet 31, this arrangement can also reduce manufacturing, use and maintenance costs.

[0190] refer to Figure 10 In some embodiments, a portion of the structure of the main control component 32 and a portion of the structure of the power distribution component 34 are located on the inner surface of the cabinet door 312.

[0191] The inner surface of cabinet door 312 refers to the surface of cabinet door 312 facing the receiving space. After cabinet door 312 covers the opening of the receiving space, the inner surface of cabinet door 312 is located within the receiving space.

[0192] Part of the structure of the main control component 32 and part of the structure of the power distribution component 34 are located on the inner surface of the cabinet door 312, so as to utilize the installation space on the inner surface of the cabinet door 312 and enable the main control component 32 and the power distribution component 34 to be installed more reasonably inside the cabinet 31.

[0193] In this embodiment, part of the structure of the main control component 32 and part of the structure of the power distribution component 34 are set on the inner surface of the cabinet door 312, which makes more reasonable use of the inner wall surface of the cabinet 31 and makes fuller use of the storage space of the cabinet 31.

[0194] refer to Figure 10 In some embodiments, the main control assembly 32 includes a display 325 disposed on the inner surface of the cabinet door 312; and / or the power distribution assembly 34 includes at least one of a relay 349 and an energy meter 3410 disposed on the inner surface of the cabinet door 312.

[0195] Display 325 refers to the device in the main control assembly 32 used to limit parameters. Display 325 can display the parameters acquired by the battery management unit 321, the first detection module 322, and the second detection module 323. Display 325 is located on the inner surface of the cabinet door 312. Display 325 can be connected to the inner surface of the cabinet door 312 by snap-fit, screw-fit, or other means. The side of the display 325 that displays parameters can extend outside the cabinet door 312 for easy observation by staff. Alternatively, an observation window with a transparent cover can be provided on the cabinet door 312, and the display 325 can be placed inside the observation window for easy observation by staff.

[0196] Relay 349 refers to the structure in the power distribution assembly 34 used to control the on / off state of the control circuit. Relay 349 can respond to the corresponding signal and make the corresponding circuit open or closed. The power distribution assembly 34 may include one relay 349, or two or more relays 349. Relay 349 can be connected to the inner surface of cabinet door 312 by snap-fit, screw connection or other means.

[0197] The electricity meter 3410 refers to the device in the power distribution assembly 34 used to measure the electricity of the corresponding circuit; the power distribution assembly 34 may include one electricity meter 3410, or two or more electricity meters 3410; the electricity meter 3410 may be connected to the inner surface of the cabinet door 312 by snap-fit, screw-fit or other means.

[0198] This embodiment provides specific components of a partial control assembly 32 and a partial power distribution assembly 34 installed on the cabinet door 312, making reasonable use of the inner wall surface of the cabinet 31 and making full use of the cabinet 31's storage space.

[0199] refer to Figure 4 In some embodiments, the power distribution assembly 34 includes at least one of the following: terminal block 342, current transformer 343, circuit breaker 344, emergency stop switch 345, surge protector 346, current converter 347, and automatic transfer switch 348.

[0200] Terminal block 342 refers to a component in power distribution assembly 34 that has one or more independent connection points, which can serve as a connection hub between circuit breaker 344, relay 349 and cables outside cabinet 31.

[0201] Current transformer 343 refers to a device in power distribution assembly 34 used for measuring and protecting equipment safety. For example, current transformer 343 can be connected to relay 349 or other devices. In the event of a short circuit, overload or other fault in the circuit, current transformer 343 can provide a fault current signal to relay 349. Relay 349 will then determine the fault and trigger a circuit break to protect the corresponding circuit.

[0202] Circuit breaker 344 refers to the device in the power distribution assembly 34 used to control the opening and closing of the circuit. Circuit breaker 344 can also provide overload protection, short circuit protection and other protection functions.

[0203] Emergency stop switch 345 refers to a device in power distribution assembly 34 used to cut off the corresponding circuit, so that the corresponding circuit can be cut off after being triggered, thereby reducing the risk of equipment damage or personal injury.

[0204] Surge protector 346 refers to the safety protection device in the power distribution assembly 34 to reduce the risk of damage to the corresponding circuits and devices due to instantaneous overvoltage and overcurrent.

[0205] Current converter 347 refers to a device in power distribution assembly 34 used for energy conversion. Current converter 347 may include an AC-DC converter to convert AC power into DC power, and current converter 347 may also include a DC-DC converter to change the voltage of the current.

[0206] Automatic transfer switch 348 refers to a device in power distribution assembly 34 used to switch between two or more circuits. For example, automatic transfer switch 348 can switch to backup power in the event of a failure of the normal power supply so that the circuit can be used normally.

[0207] The power distribution assembly 34 may include one or more of the following: terminal block 342, current transformer 343, circuit breaker 344, emergency stop switch 345, surge protector 346, current converter 347, and automatic transfer switch 348. The number of each device in the power distribution assembly 34 may be one, two, or more.

[0208] For example, terminal block 342, current transformer 343, circuit breaker 344, emergency stop switch 345, surge protector 346, current converter 347, and automatic transfer switch 348 can all be installed on the first wall 3111 so that staff can operate, inspect, or replace them after opening cabinet door 312.

[0209] This embodiment provides some specific components of the power distribution component 34 so that the power distribution component 34 can better distribute the electrical energy of the energy storage device 100 and better play the role of on / off control and protection.

[0210] refer to Figure 2 In some embodiments, the energy storage device 100 further includes a heat exchange component 40 disposed in the electrical compartment 11. The heat exchange component 40 is used to control the temperature of the battery compartment 12 and is located above the electrical compartment 30 along the height direction of the housing 10.

[0211] The heat exchange component 40 refers to the structure in the energy storage device 100 that controls the temperature inside the battery compartment 12. The heat exchange component 40 may include a water-cooled unit, or it may include an air-cooled or other cooling structure. The heat exchange component 40 is installed inside the electrical compartment 11. The heat exchange component 40 may be directly connected to the inner wall of the electrical compartment 11, or it may be indirectly connected to the inner wall of the electrical compartment 11 through an intermediate structure. The heat exchange component 40 may be connected to the inner wall of the electrical compartment 11 by bonding, welding or other means.

[0212] For example, the heat exchange component 40 is a water-cooled unit, and a heat exchange medium pipeline is provided in the battery compartment 12. The heat exchange component 40 controls the temperature of the heat exchange medium by exchanging heat with the heat exchange medium pipeline, thereby controlling the temperature in the battery compartment 12. The heat exchange medium may include liquid medium, solid medium, gaseous medium or a mixture of different forms. The liquid medium may include coolant or refrigerant.

[0213] Since the heat exchange medium pipelines in the battery compartment 12 are mostly located above the electrical compartment 11, the heat exchange assembly 40 is placed above the electrical box 30 so that the heat exchange assembly 40 corresponds to the heat exchange medium pipelines.

[0214] In this embodiment, a heat exchange component 40 is provided to control the temperature inside the battery compartment 12. The heat exchange component 40 is placed inside the electrical compartment 11 to reduce the space occupied by the heat exchange component 40 inside the battery compartment 12 and to reduce the negative impact of the placement of the heat exchange component 40 on the energy density. The heat exchange component 40 is placed above the electrical box 30 so that the heat exchange component 40 can be connected to the heat exchange medium pipeline and other structures inside the battery compartment 12.

[0215] In some embodiments, the energy storage device 100 includes a housing 10, a battery device 20, an electrical box 30, and a heat exchange assembly 40.

[0216] The housing 10 has an electrical compartment 11 and a battery compartment 12. The battery device 20 is located in the battery compartment 12. The electrical box 30 and the heat exchange component 40 are located in the electrical compartment 11. The heat exchange component 40 is located above the electrical box 30 along the height direction Z of the energy storage device, and the heat exchange component 40 occupies most of the space above the electrical box 30.

[0217] The electrical box 30 includes a cabinet 31, which includes a cabinet body 311 and a cabinet door 312. The cabinet body 311 has an accommodating space with an opening at one end, and the cabinet 31 covers the opening of the accommodating space.

[0218] The main body of the cabinet 311 includes a first wall 3111 opposite to the cabinet door 312. The first wall 3111 is connected to the second wall 3112 at both ends along the height direction Z of the electrical box 30. The first wall 3111 is connected to the third wall 3113 at both ends along the width direction Y of the electrical box 30. The third wall 3113 is connected to the adjacent second wall 3112 at both ends along the height direction of the electrical box 30.

[0219] The electrical box 30 has a protruding boss 3114 on one side of the cabinet door 312, which protrudes away from the first wall 3111. The boss 3114 is offset from the cabinet door 312 and is located below the cabinet door 312. The boss 3114 is provided with a plug hole.

[0220] The electrical box 30 also includes a power distribution assembly 34 and a main control assembly 32 housed within the housing space.

[0221] The power distribution assembly 34 includes a terminal block 342, a current transformer 343, a circuit breaker 344, an emergency stop switch 345, a surge protector 346, a current converter 347, and an automatic transfer switch 348 connected to the first wall 3111; the power distribution assembly 34 includes a fuse 341 connected to the third wall 3113; the power distribution assembly 34 also includes a relay 349 and an energy meter 3410 connected to the inner surface of the cabinet door 312.

[0222] The main control assembly 32 includes a battery management unit 321 and a first detection module 322 connected to a second wall 3112, which is located above the first wall 3111 along the height direction Z of the electrical box 30. The main control assembly 32 also includes a plug-in terminal 324 connected to another second wall 3112, which is located below the first wall 3111 along the height direction Z of the electrical box 30, and the plug-in terminal 324 corresponds to the plug-in hole of the boss portion 3114.

[0223] The main control assembly 32 also includes a second detection module 323 connected to the third wall 3113, and the second detection module 323 and the fuse 341 are located in different third walls 3113; the main control assembly 32 also includes a display 325 connected to the inner surface of the cabinet door 312.

[0224] The electrical box 30 also includes a fan 351 and a ventilation hole 352. The ventilation hole 352 and the fuse 341 are located on the same third wall 3113, and the ventilation hole 352 is located below the fuse 341 along the height direction Z of the electrical box 30. The fan 351 and the second detection module 323 are located on the same third wall 3113, and the fan 351 is located above the second detection module 323 along the height direction Z of the electrical box 30. The fan 351 is used to extract the gas in the containment space to the space outside the cabinet 31.

[0225] refer to Figures 3 to 8 Secondly, this application embodiment also provides an electrical box 30, including a cabinet 31, the cabinet 31 is provided with a main control component 32 and a power distribution component 34, the main control component 32 includes a battery management unit 321.

[0226] Cabinet 31 refers to the structure in electrical box 30 that provides an installation base for main control component 32, power distribution component 34 or other structures. Cabinet 31 can form the internal environment of electrical box 30, and the internal environment formed by cabinet 31 can accommodate main control component 32, power distribution component 34 or other structural components of electrical box 30. Cabinet 31 can be a prismatic structure, a cylindrical structure or other shapes. Cabinet 31 can be directly connected to the inner wall of box 10, or it can be indirectly connected to box 10 through an intermediate structure. The material of cabinet 31 can include metal, plastic or other materials.

[0227] The central control assembly 32 refers to the combination of electronic devices in the electrical box 30 used to monitor, control, and manage the status of each battery device 20. The central control assembly 32 may include a battery management unit (BMU), which is used to acquire status information of the battery device 20 or battery cell assembly or battery cell, and to balance the voltage of each battery device 20 or battery cell assembly or battery cell. The battery management unit 321 can also be used to protect the battery device 20 or battery cell assembly or battery cell and transmit status information. The central control assembly 32 may also include an insulation monitoring module (IMM) to monitor the insulation performance of the battery device 20 or battery cell assembly or battery cell. It is understood that the central control assembly 32 may also include other devices, and is not limited to the battery management unit 321 and the insulation monitoring module.

[0228] The power distribution assembly 34 refers to the combination of electronic devices in the electrical box 30 used to distribute the electrical energy input or output of each battery device 20, control the circuit through holes and safety status; the power distribution assembly 34 may include devices such as fuses 341, relays 349, surge protectors 346, and automatic switches.

[0229] Compared to the traditional energy storage device 100 where the distribution box and the main control box are set up separately, this embodiment sets up the main control component 32 and the supporting components in the same cabinet 31, which reduces the space occupation.

[0230] Because traditional distribution boxes and main control boxes typically have different volumes, there are often small, irregularly shaped spaces between or around them that are difficult to utilize, resulting in low space utilization for their installation. Therefore, in this embodiment, the main control component 32 and its supporting components are both housed within the same cabinet 31. This cabinet 31 can be designed with a regular shape, such as a cuboid structure, optimizing the space occupied by the electrical box 30 and reducing irregularly shaped spaces around it. This facilitates the arrangement of other structures within the installation space and improves the space utilization rate.

[0231] In this embodiment, the power distribution component 34 and the main control component 32 are placed in the same cabinet 31, which reduces the space occupied by the electrical box 30. At the same time, this arrangement also makes the shape of the electrical box 30 more regular, which is more conducive to the layout and can reduce the negative impact on the layout of other structures in its installation space, thereby improving the space utilization rate.

[0232] refer to Figure 11 Thirdly, embodiments of this application also provide an energy storage system, including an energy storage device 100 provided in some embodiments of the first aspect; the energy storage system further includes a power conversion device 200, which is used to electrically connect a power generation device 300 and an energy storage device 100, and the power conversion device 200 may be located inside the housing space of the energy storage device 100 or disposed outside the housing space of the energy storage device 100.

[0233] For example, an energy storage system may include one or more energy storage devices 100 and a power conversion system (PCS), wherein the power conversion system 200 is used to connect between the power generation equipment and the energy storage device 100. The power generation equipment is used to generate electrical energy, which can be stored in the energy storage device 100 through the power conversion system 200. As an example, the power generation equipment may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation equipment is not limited in this application.

[0234] refer to Figure 12 Fourthly, embodiments of this application also provide a charging network, including an energy storage device 100 provided in some embodiments of the first aspect, or an energy storage system provided in some embodiments of the third aspect; the charging network also includes a charging pile 400, and the energy storage device 100 is used to provide electrical energy to the charging pile 400.

[0235] The charging pile 400 is electrically connected to the energy storage device 100, which provides power to the charging pile 400. The charging pile 400 is also electrically connected to the battery device 20 in the energy storage device 100 via a cable, allowing the battery device 20 to supply its stored electrical energy to the charging pile 400. The charging pile 400 has one or more connectors 500 for connecting to electrical equipment (such as vehicles) to replenish power to the equipment.

[0236] The energy storage device 100 can be located inside the charging pile 400 (e.g., an integrated energy storage and charging unit) or outside the charging pile 400.

[0237] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: The enclosure includes an electrical compartment and a battery compartment; The battery assembly is housed in the battery compartment; An electrical box is housed in the electrical compartment. The electrical box includes a cabinet, and the cabinet contains a central control assembly and a power distribution assembly. The central control assembly includes a battery management unit. At least two different inner walls of the cabinet are respectively provided with portions of the central control assembly and / or the power distribution assembly.

2. The energy storage device according to claim 1, characterized in that, The cabinet includes a cabinet body, which has an accommodating space with an opening at one end. The main control component and the power distribution component are both accommodated in the accommodating space, and portions of the main control component are respectively disposed on different walls of the accommodating space. The cabinet also includes a cabinet door connected to the main body of the cabinet, the cabinet door covering the opening.

3. The energy storage device according to claim 2, characterized in that, The cabinet body includes a first wall, two second walls and two third walls. The first wall is opposite to the cabinet door along a first direction. The two second walls are respectively located at opposite ends of the first wall along a second direction. The two third walls are respectively located at opposite ends of the first wall along a third direction. The two third walls and the two second walls are connected end to end in sequence, and the first direction, the second direction and the third direction are perpendicular to each other. The first wall, the second wall, and the third wall are respectively provided with at least a portion of the main control assembly and / or at least a portion of the power distribution assembly.

4. The energy storage device according to claim 3, characterized in that, The battery management unit is located on the second wall.

5. The energy storage device according to claim 3, characterized in that, The overall control assembly also includes a first detection module, which and the battery management unit are located on the same second wall; And / or, the overall control assembly further includes a second detection module, which is disposed on the third wall.

6. The energy storage device according to claim 4, characterized in that, The main control assembly also includes a plug-in terminal, which is located on the second wall, and the plug-in terminal and the battery management unit are located on different second walls.

7. The energy storage device according to claim 6, characterized in that, The cabinet body has a protrusion on the side opposite to the first wall. The protrusion protrudes away from the first wall. The protrusion and the cabinet door are located on the same side of the cabinet body and are offset from each other. The protrusion has a plug hole, which corresponds to the plug end.

8. The energy storage device according to claim 7, characterized in that, The protruding part is located below the cabinet door along the direction of gravity; The distance between the outer surface of the cabinet door and the first wall is greater than or equal to the distance between the outer surface of the boss and the first wall; And / or, a water-blocking part is provided on the outer surface of the boss portion, and the water-blocking part is provided on the side of the boss portion near the cabinet door.

9. The energy storage device according to claim 5, characterized in that, The power distribution assembly includes a fuse, which is located on the third wall.

10. The energy storage device according to claim 9, characterized in that, The fuse and the second detection module are respectively located on different parts of the third wall.

11. The energy storage device according to claim 9 or 10, characterized in that, The electrical box also includes a ventilation structure, which is located on the third wall.

12. The energy storage device according to claim 11, characterized in that, The ventilation structure includes a fan and / or ventilation holes.

13. The energy storage device according to any one of claims 2-10, characterized in that, Both the main control component and the power distribution component are located on the inner surface of the cabinet door.

14. The energy storage device according to claim 13, characterized in that, The central control unit includes a display located on the inner surface of the cabinet door; and / or The power distribution assembly includes at least one of a relay and an electricity meter disposed on the inner surface of the cabinet door.

15. The energy storage device according to any one of claims 1-10, characterized in that, The power distribution components include at least one of the following: terminal block, current transformer, circuit breaker, emergency stop switch, surge protector, current converter, and automatic transfer switch.

16. The energy storage device according to any one of claims 1-10, characterized in that, The energy storage device also includes a heat exchange component located inside the electrical compartment. The heat exchange component is used to control the temperature of the battery compartment and is located above the electrical compartment along the height direction of the housing.

17. An electrical box, characterized in that, It includes a cabinet, which houses a central control unit and a power distribution unit, the central control unit including a battery management unit.

18. An energy storage system, characterized in that, Including the energy storage device as described in any one of claims 1-16; and A power conversion device, connected to the energy storage device, performs power conversion on the current input to or output from the energy storage device.

19. A charging network, characterized in that, It includes a charging pile and an energy storage device as described in any one of claims 1-16 or an energy storage system as described in claim 18, wherein the energy storage device is used to provide electrical energy to the charging pile.

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