Energy storage device, energy storage system and charging network

Abstract

The application provides an energy storage device, an energy storage system and a charging network. The energy storage device comprises a cabinet body, a battery device, a thermal management module and a control module. The cabinet body comprises a first warehouse body and a second warehouse body arranged along the length direction of the cabinet body. The first warehouse body comprises a first sub-warehouse and a second sub-warehouse, and the first sub-warehouse is located above the second sub-warehouse. The battery device is accommodated in the second warehouse body. The thermal management module is at least partially accommodated in the first sub-warehouse. The control module is at least partially accommodated in the second sub-warehouse. The first sub-warehouse comprises a first top wall and three side walls. Two of the three side walls are oppositely arranged along the width direction of the cabinet body, and the other side wall is located on the side of the thermal management module away from the second warehouse body along the length direction of the cabinet body. The first top wall is provided with an air outlet, and the three side walls are all provided with an air inlet. Such an energy storage device can improve the ventilation and heat dissipation effect of the thermal management module, reduce the risk of thermal runaway of the battery device in the energy storage device, and improve the reliability of the energy storage device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] With the rapid development of technology, electricity has become an indispensable energy source in people's production and daily life. To improve the smoothness of electricity supply and ensure the normal operation of production and daily life, energy storage devices are needed. As devices that cyclically store and release electrical energy, energy storage devices store electrical energy or supply the stored energy to electrical devices through charging or discharging. Energy storage devices are widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations.

[0003] In the development of energy storage devices, besides improving their performance, reducing their reliability is also a significant issue. Therefore, enhancing the reliability of energy storage devices is a continuous technical challenge in energy storage technology. Utility Model Content

[0004] This application provides an energy storage device, an energy storage system, and a charging network, which can improve the reliability of the energy storage device.

[0005] In a first aspect, embodiments of this application provide an energy storage device, including a cabinet, a battery device, a thermal management module, and a control module; the cabinet includes a first compartment and a second compartment arranged along the length of the cabinet, the first compartment including a first sub-compartment and a second sub-compartment, the first sub-compartment being located above the second sub-compartment; the battery device is housed in the second compartment; the thermal management module is at least partially housed in the first sub-compartment, and the thermal management module is used to manage the temperature of the battery device; the control module is at least partially housed in the second sub-compartment, and the control module is used to perform electrical control on the battery device; wherein, the walls of the first sub-compartment include a first top wall and three side walls, the first top wall being located on the side of the thermal management module away from the second sub-compartment along the height direction of the cabinet, the three side walls being connected to the first top wall, two of the three side walls being arranged opposite each other along the width direction of the cabinet, and the other side wall being located on the side of the thermal management module away from the second compartment along the length direction of the cabinet, the first top wall being provided with an air outlet, and the three side walls being provided with air inlets.

[0006] In the above technical solution, by setting an air outlet on the first top wall and air inlets on all three side walls, the first sub-compartment can receive airflow through the air inlets on the three side walls and discharge airflow through the air outlet on the first top wall. On the one hand, the air outlet is located above the air inlet, so the airflow in the first sub-compartment can be discharged upwards, reducing the risk of the airflow discharged from the first sub-compartment flowing back to the air inlet and affecting the air inlet temperature of the first sub-compartment. On the other hand, the air inlets on all three side walls can increase the airflow of the first sub-compartment, thereby enabling the thermal management module in the first sub-compartment to have more ventilation, improving the ventilation and heat dissipation effect of the thermal management module, reducing the risk of thermal runaway of the battery device in the energy storage device, and improving the reliability of the energy storage device.

[0007] In some embodiments, the sidewall includes a frame and an air inlet plate, the air inlet plate being detachably connected to the frame, and the air inlet being disposed on the air inlet plate. The detachable connection between the air inlet plate and the frame, and the placement of the air inlet on the air inlet plate, facilitates the replacement of the air inlet plate and the maintenance of the air inlet, and also facilitates the maintenance and repair of the thermal management module in the first sub-compartment, thereby improving the operational stability of the thermal management module.

[0008] In some embodiments, the air inlet includes a plurality of air inlet holes spaced apart on the air inlet plate. By providing a plurality of air inlet holes on the air inlet plate, the air intake of the first sub-compartment can be made more uniform, and the air inlet holes can make the air intake of the first sub-compartment smaller in size, reducing the risk of impurities entering the first sub-compartment.

[0009] In some embodiments, the maximum inscribed circle diameter of the air inlet is less than or equal to 10 mm. By setting the maximum inscribed circle diameter of the air inlet to less than or equal to 10 mm, the risk of biological invasion into the first sub-compartment can be reduced, making the operation of the thermal management module more stable.

[0010] In some embodiments, the opening ratio of the air intake plate is 30%-95%. An opening ratio greater than or equal to 30% allows the air intake plate to have a larger air intake volume, thereby improving the heat dissipation effect of the thermal management module; an opening ratio less than or equal to 95% can improve the strength of the air intake plate and reduce the risk of damage to the air intake plate. Therefore, an opening ratio of 30%-95% can balance improving the air intake volume and the strength of the air intake plate, thereby improving the heat dissipation effect of the thermal management module and reducing the risk of damage to the air intake plate.

[0011] In some embodiments, the opening ratio of the air intake plate is 60%-80%. An opening ratio of 60% or more can further increase the air intake volume of the air intake plate, thereby further improving the heat dissipation effect of the thermal management module; an opening ratio of 80% or less can further increase the strength of the air intake plate and reduce the risk of damage to the air intake plate. Therefore, an opening ratio of 60%-80% can further balance increasing the air intake volume and the strength of the air intake plate, improving the heat dissipation effect of the thermal management module and reducing the risk of damage to the air intake plate.

[0012] In some embodiments, at least one sidewall includes a plurality of air inlet plates, with at least two air inlet plates arranged along the height direction. By arranging the air inlet plates of the sidewall along the height direction, the lower air inlet plate is positioned lower, which facilitates the disassembly and maintenance of the air inlet plates and also helps to reduce the maintenance difficulty of the thermal management module in the first sub-compartment.

[0013] In some embodiments, the cabinet has a first surface, which is the surface of the cabinet furthest from the first top wall along the height direction. The minimum distance between the first surface and the air inlet plate closest to the first surface is less than or equal to 1800 mm. By setting the minimum distance between the first surface and the air inlet plate closest to the first surface to be less than or equal to 1800 mm, the height of the air inlet plate is lower, which facilitates the disassembly and assembly of the air inlet plate and reduces the maintenance difficulty of the air inlet plate and the thermal management module.

[0014] In some embodiments, the three sidewalls include a first sidewall, and the cabinet also includes a first side beam, a second side beam, a first partition, and a second partition. The first sidewall, the first side beam, and the second side beam are located on the same side of the thermal management module along the width direction. The first side beam extends along the height direction, and the second side beam extends along the length direction. The second side beam is connected to the first side beam and is located at the top of the cabinet. The first partition separates the first compartment and the second compartment, and the second partition separates the first sub-compartment and the second sub-compartment. The first sidewall is connected to the first partition, the second partition, the first side beam, and the second side beam. By connecting the first sidewall to the first partition, the second partition, the first side beam, and the second side beam, the first and second side beams have higher strength, which improves the stability of the first sidewall and makes the installation of the air inlet plate more stable.

[0015] In some embodiments, along the width direction, the first side beam has a second surface facing away from the first sub-compartment, and the first sidewall does not protrude from the second surface. This reduces the risk of the first sidewall being damaged by contact with external equipment, improves the structural stability of the first sidewall, and makes the air intake and exhaust of the first sub-compartment more stable.

[0016] In some embodiments, the three sidewalls include a second sidewall, and the cabinet also includes a first side beam, a third side beam, a fourth side beam, and a second partition. The first, third, and fourth side beams are located on the same side along the length of the thermal management module. The first and fourth side beams extend along the height direction, and the third side beam extends along the width direction. The third side beam connects the first and fourth side beams and is located at the top of the cabinet. The second partition separates the first sub-compartment and the second sub-compartment. The second sidewall is connected to the first, third, fourth side beams, and second partition. By connecting the second sidewall to the first, third, fourth side beams, and second partition, the first, third, and fourth side beams have higher strength, which improves the stability of the second sidewall and makes the installation of the air inlet plate more stable.

[0017] In some embodiments, along the length direction, the first side beam has a third surface facing away from the first sub-compartment, and the fourth side beam has a fourth surface facing away from the first sub-compartment, and the second sidewall does not protrude from the third and fourth surfaces. This reduces the risk of the second sidewall being damaged by contact with external equipment, improves the structural stability of the second sidewall, and makes the air intake and exhaust of the first sub-compartment more stable.

[0018] In some embodiments, the cabinet includes a second partition that separates a first sub-compartment and a second sub-compartment. A flow channel is provided within the second partition, connecting the first sub-compartment to the external space of the cabinet. By providing the flow channel within the second partition, airflow can be supplied to the first sub-compartment, and water can also be drained from the first sub-compartment through the flow channel, thus improving the performance of the thermal management module.

[0019] In some embodiments, along its length, the second partition has a fifth surface facing away from the second compartment, the fifth surface being part of the outer surface of the cabinet, and a flow channel extending to the fifth surface. By extending the flow channel to the fifth surface, the flow channel can drain accumulated water in the first sub-compartment through the fifth surface of the second partition into the cabinet, reducing the impact of accumulated water on the thermal management module.

[0020] In some embodiments, the flow channel forms an opening on the fifth surface. The energy storage device also includes a flow guide located outside the cabinet. Along its length, the flow guide is located on the side of the first compartment opposite to the second compartment. The flow guide extends along its width and is located below the opening along its height. In this way, the flow guide can guide water flowing out of the flow channel away from the cabinet, reducing the impact of water accumulation on the cabinet structure, such as the second sub-compartment, i.e., the components inside the cabinet.

[0021] Secondly, embodiments of this application provide an energy storage system, including an energy storage converter and an energy storage device provided in any of the embodiments of the first aspect, wherein the energy storage converter is electrically connected to the energy storage device.

[0022] Thirdly, embodiments of this application provide a charging network, including a charging pile and an energy storage device provided in any of the embodiments of the first aspect, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a charging network provided in some embodiments of this application; Figure 2 This application provides schematic diagrams of the structure of an energy storage system according to some embodiments. Figure 3 This is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application; Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 5 A schematic diagram of the structure of an energy storage device provided in some embodiments of this application (showing the first top wall); Figure 6 Schematic diagrams of the structure of the energy storage device provided in some embodiments of this application; Figure 7 Schematic diagrams of the energy storage device provided in some further embodiments of this application; Figure 8 This is a schematic diagram of the structure of a thermal management module provided in some embodiments of this application; Figure 9 A schematic diagram of the overall control module, sub-control modules, and battery device provided for some embodiments of this application; Figure 10 Exploded views of the sidewalls provided for some embodiments of this application; Figure 11 for Figure 10 A magnified view of a portion of region A in the middle; Figure 12 Schematic diagrams of the energy storage device provided in other embodiments of this application; Figure 13 for Figure 5 A magnified view of a portion of region B in the middle; Figure 14 for Figure 5 A magnified view of a portion of region C in the middle; Figure 15 for Figure 5A magnified view of a portion of region D.

[0025] Icons: 1-First compartment; 11-First sub-compartment; 111-First top wall; 1111-Air outlet; 112-Side wall; 112a-First side wall; 112b-Second side wall; 1121-Air inlet; 11211-Air inlet hole; 1122-Frame; 11221-Side frame; 1123-Air inlet plate; 1124-First outer surface; 1125-Second outer surface; 12-Second sub-compartment; 2-Second compartment; 3-First surface; 4-First side beam; 41-Second surface; 42-Third surface; 5-Second side beam; 6-First partition; 7-Second partition; 71-Flow channel; 72-Fifth surface; 721-Opening; 73-First top surface; 8-Third side beam; 9-Fourth side beam; 91-Fourth surface; 10-Cabinet; 20-Battery unit; 201-Casing; 2011-First casing; 2012-Second casing; 202-Battery cell; 203-Thermal management component; 30-Thermal management module; 301-Condenser; 302-Pumping device; 303-Heat exchanger; 304-Compressor; 305-Throttling device; 306-Fan; 307-Cooling circulation loop; 308-Refrigerant circulation loop; 40-Control module; 401-Main control module; 402-Sub-control module; 4021-First control section; 4022-Second control section; 50-Flow guide; 100 - Energy storage device; 200 - Charging pile; 300 - Energy storage converter; 1000 - Charging network; 2000 - Energy storage system; X - Length direction; Y - Width direction; Z - Height direction. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0028] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0029] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0030] In this application, "multiple" means two or more (including two).

[0031] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0032] The battery mentioned in the embodiments of this application may be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar.

[0033] In some embodiments, the battery can be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0034] In some embodiments, the battery may be a battery pack, which includes a housing and individual battery cells, wherein the individual battery cells or battery modules are housed in the housing.

[0035] In some embodiments, the energy storage system includes energy storage containers, energy storage cabinets, etc.

[0036] A single battery cell typically includes an electrode assembly. The electrode assembly comprises a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0037] Optionally, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0038] Optionally, the electrode assembly has a stacked structure.

[0039] Optionally, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0040] In some embodiments, the energy storage system may include a battery unit and a housing, with the battery unit housed within the housing. The battery unit includes multiple individual battery cells.

[0041] In some embodiments, the energy storage system may further include a converter electrically connected to the battery device to convert the DC power of the battery device into AC power so as to enable the battery device to output power, or to convert the AC power of the external circuit into DC power so as to enable the battery device to store power.

[0042] In some embodiments, the energy storage system may further include a control module for electrically controlling the battery device.

[0043] In some embodiments, the energy storage system may further include a thermal management module for managing the temperature of the battery device.

[0044] Energy storage systems can include energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems. Energy storage power stations store electrical energy during off-peak hours and provide power to users or electrical equipment during peak hours. Wind power systems collect wind energy from wind turbines, convert it into electricity, and then store it in an energy storage system. Solar power systems convert solar energy into electricity, store it in an energy storage system, and supply it to users as needed. Mobile power systems can power equipment in areas inaccessible by the mains grid, such as remote mountainous areas and isolated wilderness areas. Temporary power supply systems can provide power to users when there is insufficient electricity.

[0045] Energy storage devices typically require thermal management and control modules to manage the temperature and control the electrical components of the battery pack. These modules can be housed within a cabinet to reduce space requirements and increase integration. To improve the thermal management performance of the module, ventilation can be provided to adjust its temperature. However, placing the thermal management module within a cabinet negatively impacts ventilation, affecting its thermal management performance and reducing the overall reliability of the energy storage device.

[0046] Therefore, to improve the thermal management performance of the thermal management module, this application provides an energy storage device, including a cabinet, a battery device, a thermal management module, and a control module. The cabinet includes a first compartment and a second compartment arranged along the length of the cabinet. The first compartment includes a first sub-compartment and a second sub-compartment, with the first sub-compartment located above the second sub-compartment. The battery device is housed in the second compartment. The thermal management module is housed in the first sub-compartment and is used to manage the temperature of the battery device. The control module is housed in the second sub-compartment and is used to perform electrical control on the battery device. The first sub-compartment includes a first top wall and three side walls. The first top wall is located on the side of the thermal management module facing away from the second sub-compartment along the height direction of the cabinet. All three side walls are connected to the first top wall. Two of the three side walls are arranged opposite each other along the width direction of the cabinet, and the third side wall is located on the side of the thermal management module facing away from the second compartment along the length direction of the cabinet. The first top wall has an air outlet, and all three side walls have air inlets.

[0047] In this energy storage device, by setting an air outlet on the first top wall and air inlets on all three side walls, the first sub-compartment can receive airflow through the air inlets on the three side walls and exhaust airflow through the air outlet on the first top wall. On the one hand, the air outlet is located above the air inlet, allowing the airflow in the first sub-compartment to be discharged upwards, reducing the risk of airflow flowing back to the air inlet and affecting the airflow temperature of the first sub-compartment. On the other hand, the air inlets on all three side walls can increase the airflow into the first sub-compartment, thereby allowing the thermal management module in the first sub-compartment to have more ventilation, improving the ventilation and heat dissipation effect of the thermal management module, reducing the risk of thermal runaway of the battery device in the energy storage device, and improving the reliability of the energy storage device.

[0048] The following description, in conjunction with the accompanying drawings, illustrates the energy storage device, the energy storage system using the energy storage device, and the charging network.

[0049] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a charging network 1000 provided in some embodiments of this application. Embodiments of this application provide a charging network 1000, which includes a charging pile 200 for charging electrical equipment. The charging network 1000 may also include an energy storage device 100, which is electrically connected to the charging pile 200 and provides electrical energy to the charging pile 200.

[0050] It should be noted that the charging pile 200 is electrically connected to the battery cells 202 in the energy storage device 100 via cables. The battery cells 202 can supply their stored electrical energy to the charging pile 200. The charging pile 200 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's energy. The application of the energy storage device 100 in this charging network 1000 can effectively improve the safety of the charging network 1000 and also help to improve the flexibility of the charging network 1000 during deployment.

[0051] In a charging network 1000, there can be one charging pile 200, and the energy storage device 100 provides power to the one charging pile 200; there can also be multiple charging piles 200, and the energy storage device 100 provides power to multiple charging piles 200.

[0052] As an example, such as Figure 1 As shown, the charging network 1000 includes an energy storage device 100 and two charging piles 200, with the energy storage device 100 providing power to the two charging piles 200.

[0053] The energy storage device 100 may include a battery device 20, which is electrically connected to the charging pile 200 so that the battery device 20 can provide power to the charging pile 200.

[0054] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of an energy storage system 2000 provided in some embodiments of this application. Embodiments of this application provide an energy storage system 2000. The energy storage system 2000 may include an energy storage device 100 and an energy storage converter 300 (PCS, Power Conversion System), with the energy storage device 100 and the energy storage converter 300 electrically connected.

[0055] The energy storage converter 300 is a device that connects external equipment to the energy storage device 100. The external equipment can be the power grid, electrical equipment, etc. The energy storage converter 300 has a DC side and an AC side. The DC side is used for electrical connection with the energy storage device 100, and the AC side is used for connection with the external equipment.

[0056] When the energy storage device 100 is in the charging state, the energy storage converter 300 acts as a rectifier to convert the electrical energy from the AC power on the AC side into DC power and store it in the energy storage device 100. When the energy storage device 100 is in the discharging state, the energy storage converter 300 acts as an inverter to convert the electrical energy stored in the energy storage device 100 from the DC power on the DC side into AC power and deliver it to external equipment.

[0057] In the energy storage system 2000, one energy storage converter 300 can be configured with one energy storage device 100 or multiple energy storage devices 100. In an embodiment where one energy storage converter 300 is configured with multiple energy storage devices 100, the energy storage devices 100 can be two, three, four, five, six, seven, eight or more.

[0058] In the energy storage system 2000, one energy storage device 100 may be equipped with multiple energy storage converters 300, at least two of which have different maximum operating voltages and can be adapted to the energy storage device 100; or one energy storage device 100 may be connected to only one energy storage converter 300, which has multiple different maximum operating voltages and can be adapted to the energy storage device 100.

[0059] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of an energy storage device 100 provided in some embodiments of this application. The energy storage device 100 includes a cabinet 10, and a battery device 20 is disposed inside the cabinet 10.

[0060] As an example, the energy storage device 100 can be an energy storage container, an energy storage cabinet, etc.

[0061] As an example, 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. Energy storage power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in energy storage device 100. Solar power generation systems can convert solar energy into electrical energy, store it in energy storage device 100, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power supply.

[0062] In some embodiments, please refer to Figure 4 , Figure 4This is a schematic diagram of the structure of a battery device 20 provided in some embodiments of this application. The battery device 20 may include a housing 201 and battery cells 202, wherein the housing 201 is used to house the battery cells 202.

[0063] The housing 201 has an enclosed space inside for accommodating the battery cells 202. The housing 201 can have various structures. In some embodiments, the housing 201 may include a first housing 2011 and a second housing 2012, which are interlocked. The first housing 2011 and the second housing 2012 can have various shapes, such as cuboids or cylinders. The first housing 2011 can be a hollow structure open on one side, and the second housing 2012 can also be a hollow structure open on one side. The open side of the second housing 2012 interlocks with the open side of the first housing 2011, thus forming a housing 201 with an enclosed space. Alternatively, the first housing 2011 can be a hollow structure open on one side, and the second housing 2012 can be a plate-like structure, with the second housing 2012 interlocked with the open side of the first housing 2011, thus forming a housing 201 with a receiving cavity.

[0064] In the battery device 20, there can be one or more battery cells 202. If there are multiple battery cells 202, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 202 are connected in both series and parallel. Alternatively, multiple battery cells 202 can be first connected in series, in parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed within the housing 201. Another option is that all battery cells 202 can be directly connected in series, in parallel, or in a mixed configuration, and then the whole consisting of all battery cells 202 is housed within the housing 201.

[0065] Please refer to Figure 5 , Figure 6 and Figure 7 , Figure 5 A schematic diagram of the structure of an energy storage device 100 provided in some embodiments of this application (showing a first top wall 111). Figure 6 A schematic diagram of the structure of an energy storage device 100 provided in some embodiments of this application; Figure 7This is a schematic diagram of the structure of an energy storage device 100 provided in some embodiments of this application. Embodiments of this application provide an energy storage device 100, including a cabinet 10, a battery device 20, a thermal management module 30, and a control module 40. The cabinet 10 includes a first compartment 1 and a second compartment 2 arranged along the length X of the cabinet 10. The first compartment 1 includes a first sub-compartment 11 and a second sub-compartment 12, with the first sub-compartment 11 located above the second sub-compartment 12. The battery device 20 is housed in the second compartment 2. The thermal management module 30 is housed in the first sub-compartment 11 and is used to manage the temperature of the battery device 20. The control module 40 is at least partially housed in the second sub-compartment 12 and is at least partially used to electrically control the battery device 20. The first sub-compartment 11 has a first top wall 111 and three side walls 112. The first top wall 111 is located on the side of the thermal management module 30 facing away from the second sub-compartment 12 along the height direction Z of the cabinet 10. The three side walls 112 are all connected to the first top wall 111. Two of the three side walls 112 are arranged opposite each other along the width direction Y of the cabinet 10, and the other side wall 112 is located on the side of the thermal management module 30 facing away from the second compartment 2 along the length direction X of the cabinet 10. The first top wall 111 is provided with an air outlet 1111, and the three side walls 112 are all provided with air inlets 1121.

[0066] The cabinet 10 has a storage space, within which the battery device 20, thermal management module 30, and control module 40 are all housed. The cabinet 10 may be rectangular in shape; in some embodiments, the cabinet 10 may be an energy storage container.

[0067] The first compartment 1 and the second compartment 2 are arranged along the length direction X of the cabinet 10, and the first sub-compartment 11 and the second sub-compartment 12 are arranged along the height direction Z, with the first sub-compartment 11 located above the second sub-compartment 12. The first sub-compartment 11, the second sub-compartment 12, and the second compartment 2 each occupy a portion of the cabinet 10's accommodating space. There can be one or more battery devices 20, all of which are housed within the second compartment 2. The thermal management module 30 can be entirely housed in the first sub-compartment 11; or only a portion of the thermal management module 30 can be housed in the first sub-compartment 11, with the remaining portion housed in the second compartment 2 or the second sub-compartment 12. The control module 40 can be entirely housed in the second sub-compartment 12; or only a portion of the control module 40 can be housed in the second sub-compartment 12, with the remaining portion housed in the second compartment 2. In an embodiment where the thermal management module 30 is entirely housed in the first sub-compartment 11 and the control module 40 is entirely housed in the second sub-compartment 12, the thermal management module 30 and the control module 40 are located on the same side of the second compartment 2 along the length direction X, and the thermal management module 30 is located above the control module 40.

[0068] The thermal management module 30 can manage the temperature of all battery devices 20 within the second compartment 2. The thermal management module 30 may include multiple thermal management units, all housed within the first sub-compartment 11, which collectively manage the temperature of all battery devices 20 within the second compartment 2. For example, each battery device 20 includes a thermal management component 203 and individual battery cells 202. The thermal management module 30 can be a liquid cooling unit, which includes multiple thermal management units such as a pumping device 302 and a heat exchanger 303. These multiple thermal management units are connected by pipelines, and the liquid cooling unit supplies cooling medium to the thermal management component 203 of the battery device 20 through these pipelines to manage the temperature of the individual battery cells 202 within the battery device 20. The thermal management component 203 may be housed within the housing 201. Alternatively, the thermal management component 203 may support the individual battery cells 202, or the thermal management component 203 and the individual battery cells 202 may be arranged in a direction perpendicular to the height direction Z.

[0069] The control module 40 is used to electrically control all battery devices 20 within the second compartment 2. The control module 40 may include multiple control units, all housed within the second sub-compartment 12, which collectively provide electrical control over the battery devices 20 within the second compartment 2. For example, the control module 40 includes a main control module 401 and a sub-control module 402. The sub-control module 402 controls the connection between the energy storage converter 300 and the battery devices 20 located within the second compartment 2. The sub-control module 402 and the main control module 401 are communicatively connected to enable the control module 40 to electrically control the battery devices 20.

[0070] The first top wall 111 of the first sub-compartment 11 is located at the top of the cabinet 10 along the height direction Z, and is part of the outer wall of the cabinet 10. The first top wall 111 is provided with air outlets 1111, which can be one or more, and all air outlets 1111 on the first top wall 111 are connected to the first sub-compartment 11. Two of the three side walls 112 of the first sub-compartment 11 are located on the sides of the cabinet 10 along the width direction Y, and the other side wall 112 is located at the end of the cabinet 10 along the length direction X, and all three side walls 112 are part of the outer wall of the cabinet 10. Each of the three side walls 112 is provided with an air inlet 1121, which can be one or more, and the number of air inlets 1121 on the three side walls 112 can be equal or unequal. All air inlets 1121 are connected to the first sub-compartment 11. The side wall 112 can be a plate-like structure, and the air inlet 1121 can be a through hole provided on the side wall 112. Alternatively, the side wall 112 can be a mesh structure, and the air inlet 1121 can be a mesh provided on the side wall 112.

[0071] In this embodiment, by providing an air outlet 1111 on the first top wall 111 and air inlets 1121 on each of the three side walls 112, the first sub-compartment 11 can receive airflow through the air inlets 1121 on the three side walls 112 and discharge airflow through the air outlet 1111 on the first top wall 111. On the one hand, the air outlet 1111 is located above the air inlets 1121, allowing the airflow discharged from the first sub-compartment 11 to be discharged upwards, reducing the risk of the airflow discharged from the first sub-compartment 11 flowing back to the air inlets 1121 and affecting the air intake temperature of the first sub-compartment 11. On the other hand, the air inlets 1121 on each of the three side walls 112 can increase the air intake of the first sub-compartment 11, thereby enabling the thermal management module 30 inside the first sub-compartment 11 to have more ventilation, improving the ventilation and heat dissipation effect of the thermal management module 30, reducing the risk of thermal runaway of the battery device 20 inside the energy storage device 100, and improving the reliability of the energy storage device 100. Furthermore, to ensure effective air intake through the air inlet 1121, sufficient air intake space needs to be reserved on the air intake side of the energy storage device 100. Therefore, the placement of the air inlet 1121 affects the installation and layout of the energy storage device 100. During the use of the energy storage device 100, multiple energy storage devices 100 are often arranged in the work area to form an energy storage system 2000. To save space occupied by the energy storage system 2000, the arrangement of the energy storage devices 100 is particularly important. By setting air inlets 1121 on the three side walls 112 of the energy storage device 100, the energy storage device 100 can obtain a larger air intake even when some air inlets 1121 are partially blocked. This reduces the impact of the air intake on the thermal management performance of the thermal management module 30 and improves the performance of the energy storage device 100.

[0072] In some embodiments, please refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of the thermal management module 30 provided in some embodiments of this application. The battery device 20 includes a thermal management component 203, and the thermal management module 30 includes a condenser 301, a pumping device 302, a heat exchanger 303, a compressor 304, a throttling device 305, and a fan 306. The fan 306 is used to dissipate heat from the condenser 301. The pumping device 302, the heat exchanger 303, and the thermal management component 203 located in the battery device 20 are connected to form a cooling circulation loop 307. The compressor 304, the condenser 301, the throttling device 305, and the heat exchanger 303 are connected to form a refrigerant circulation loop 308. The condenser 301, fan 306, pumping device 302, compressor 304, throttling device 305, and heat exchanger 303 may all be housed in the first sub-compartment 11; or a portion of the condenser 301, fan 306, pumping device 302, compressor 304, throttling device 305, and heat exchanger 303 may be housed in the first sub-compartment 11, and the other portion may be housed in the second compartment 2.

[0073] The pumping device 302, heat exchanger 303, and thermal management component 203 are connected to form a cooling circulation loop 307, which is used to cool the battery cell 202. The compressor 304, condenser 301, throttling device 305, and heat exchanger 303 are connected to form a refrigerant circulation loop 308, which is used to cool the coolant passing through the heat exchanger 303.

[0074] In some embodiments, the pumping device 302, heat exchanger 303 and thermal management component 203 are connected in sequence to form a cooling circulation loop 307, and the compressor 304, condenser 301, throttling device 305 and heat exchanger 303 are connected in sequence to form a refrigerant circulation loop 308.

[0075] It should be noted that the pumping device 302 (also known as a water pump) is a component used to transport the coolant. The heat exchanger 303 is a component used to exchange heat with the coolant flowing through it. The heat exchanger 303 can be, but is not limited to, a plate heat exchanger 303, a shell-and-tube heat exchanger 303, an air cooler, a spiral plate heat exchanger 303, a heat exchange tube bundle, etc. The coolant can be, but is not limited to, a mixture of ethylene glycol and water, etc.

[0076] Under the conveying action of the pumping device 302, the coolant can circulate in the cooling circulation loop 307, and circulate through the pumping device 302, heat exchanger 303, thermal management component 203, and pumping device 302. The above connection can be a direct connection or an indirect connection via pipelines.

[0077] By adopting the above scheme, the coolant can circulate through the thermal management component 203 to directly exchange heat with the battery cell 202 and cool the battery cell 202; the coolant after exchanging heat with the battery cell 202 can also circulate through the heat exchanger 303 and exchange heat with the heat exchanger 303, and exchange the heat exchanged from the battery cell 202 to the heat exchanger 303, so that the coolant is cooled down.

[0078] The compressor 304, condenser 301, throttling device 305, heat exchanger 303, and compressor 304 are connected to form a refrigerant circulation loop 308.

[0079] It should be noted that the above connections can be direct or indirect via piping. Compressor 304 is a component that provides power for the refrigerant circulation and cools the refrigerant. Throttling device 305 is a component used for cooling and pressure reduction; throttling device 305 can be, but is not limited to, a throttling valve, expansion valve, etc. Condenser 301 is a component used for heat exchange with the refrigerant flowing through it. Condenser 301 can be, but is not limited to, a plate heat exchanger 303, a shell-and-tube heat exchanger 303, an air cooler, a spiral plate heat exchanger 303, a heat exchange tube bundle, etc. The refrigerant has a low boiling point and heat of vaporization, and can evaporate and condense at relatively low temperatures. It achieves a cooling effect by absorbing and releasing heat. The refrigerant can be, but is not limited to, Freon, ammonia, carbon dioxide, R134A (1,1,1,2-tetrafluoroethane), R410A (Freon R-410A refrigerant), etc.

[0080] The heat exchanger 303 is located in both the cooling circulation loop 307 and the refrigerant circulation loop 308. The heat exchanger 303 internally includes a coolant flow channel 71 and a refrigerant flow channel 71. The coolant flow channel 71 participates in forming the cooling circulation loop 307, supplying coolant flow within it. The refrigerant flow channel 71 participates in forming the refrigerant circulation loop 308, supplying refrigerant flow within it. The coolant flow channel 71 and the refrigerant flow channel 71 are not interconnected to prevent mixing of the coolant and refrigerant. In the heat exchanger 303, the coolant and refrigerant can exchange heat, particularly the heat from the coolant, allowing the heat exchanger 303 to cool the coolant flowing through it.

[0081] In this embodiment, by housing the condenser 301 and the fan 306 within the first sub-compartment 11, and positioning the condenser 301 and fan 306 at the top of the first compartment 1, the fan 306 facilitates heat dissipation from the condenser 301, thereby improving the condensing performance of the condenser 301. The fan 306 is placed within the first sub-compartment 11, placing it at the top of the first compartment 1. The fan 306 blows air into the external environment through the air outlet 1111, enabling heat exchange between the condenser 301 and the outside environment. Air inlets 1121 are located on the three side walls 112 to increase the airflow into the first sub-compartment 11, thus providing airflow for heat dissipation from the condenser 301.

[0082] In some embodiments, the condenser 301, pumping device 302, heat exchanger 303, compressor 304, throttling device 305, and fan 306 are all thermal management units.

[0083] In some embodiments, please refer to Figure 9 , Figure 9This is a schematic diagram of the framework of the main control module 401, sub-control module 402, and battery device 20 provided for some embodiments of this application. The control module 40 includes the main control module 401 and the sub-control module 402. The sub-control module 402 includes a first control part 4021 and a second control part 4022. The first control part 4021 is electrically connected to the battery device 20 and the energy storage converter 300. The second control part 4022 is communicatively connected to the main control module 401 and the battery monitoring unit of the battery device 20 located in the second compartment 2.

[0084] The sub-control module can be housed in the second sub-compartment 12 or in the second compartment 2.

[0085] The battery monitoring unit of the battery device 20 located in the second compartment 2 can be used to monitor the voltage and temperature of the battery cells 202 located in the second compartment 2.

[0086] The first control section 4021 is the high-voltage section, through which electrical energy is transmitted between the energy storage converter 300 and the battery device 20. The second control section 4022 is the low-voltage section, through which communication data is transmitted between the second control section 4022 and the main control module 401, enabling the main control module 401 to monitor and control the battery device 20 located in the second compartment 2.

[0087] The energy storage converter 300 and the battery device 20 are electrically connected through a first control unit 4021. The first control unit 4021 can control the on / off switching of the energy storage converter 300 and the battery device 20 to control the input or output of electrical energy from the battery device 20. There can be a one-to-one correspondence between the energy storage converter 300 and the battery device 20, or multiple energy storage converters can correspond to multiple battery devices 20. The second control unit 4022 is communicatively connected to the main control module 401 to transmit control signals from the sub-control modules 402 to the main control module 401, or to transmit instructions from the main control module 401 to the sub-control modules 402 for execution, thus establishing a communication connection between the sub-control modules 402 and the main control module 401. There can be one sub-control module 402, with one sub-control module 402 communicating with the main control module 401; or there can be multiple sub-control modules 402, all communicating with the same main control module 401.

[0088] In this embodiment, the sub-control module 402 can control the on / off state of the energy storage converter 300 and the battery device 20, reducing the control difficulty of the battery device 20. The main control module 401 can receive the signals from the sub-control module 402 and realize the signal transmission of the sub-control module 402.

[0089] In some embodiments, the energy storage system 2000 includes a battery monitoring circuit for collecting first data from the battery device 20 located within the second compartment 2, and a main control module 401 for determining the operating status data of the energy storage device 100. The operating status data of the energy storage device 100 is associated with the first data.

[0090] In some embodiments, the second control section 4022 is communicatively connected between the battery monitoring circuit and the main control module 401.

[0091] In some embodiments, the second control section 4022 is communicatively connected between the battery monitoring circuit and the main control module 401, and the second control section 4022 is used to forward the first data.

[0092] In some embodiments, the second control section 4022 is communicatively connected between the battery monitoring circuit and the main control module 401. The second control section 4022 is used to acquire and process the first data and transmit the processed data to the main control module 401.

[0093] In some embodiments, the battery monitoring circuit is directly connected to the main control module 401, which processes the first data to determine the operating status data of the energy storage device 100.

[0094] In some embodiments, the main control module 401 may be a module in the energy storage device 100 used for monitoring and managing the battery device 20, and may serve as the management unit of the battery device 20 in the energy storage system 2000. The main control module 401 may be communicatively connected to the battery monitoring circuit, and may receive and process information from the battery monitoring circuit to determine the operating status data of the energy storage device 100 using the information from the battery monitoring circuit. The main control module 401 may monitor information such as current, voltage, power, state of charge, or temperature of the battery cells 202 of the battery device 20 to determine the operating status data of the energy storage device 100. As an example, the main control module 401 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. In some embodiments, the insulation monitoring module IMM, the master battery management unit (MBMU), the Ethernet (ETH) module, and the fiber optic conversion module are all control units.

[0095] In some embodiments, the control module 40 further includes a second control section 4022, which is communicatively connected between the battery monitoring circuit and the main control module 401.

[0096] The second control unit 4022 is communicatively connected between the battery monitoring circuit and the main control module 401, enabling the second control unit 4022 to forward information such as current, voltage, power, state of charge, or temperature of the battery cells 202 of the battery device 20 located in the second compartment 2 to the control module 40 or to process and then forward the information to the control module 40.

[0097] By setting a second control section 4022 between the battery monitoring circuit and the main control module 401, the control system of the energy storage device 100 is made into a three-level framework, which reduces the length and complexity of the communication harness, reduces sampling error, improves the reliability of the system, and also reduces the requirements for the processor and communication bus, thus reducing the overall cost of the system.

[0098] In some embodiments, the energy storage converter 300 is integrated with the corresponding first control unit 4021.

[0099] The energy storage converter 300 is integrated with the first control section 4021, so that the energy storage converter 300 and the high voltage section of the sub-control module 402 are integrated, which facilitates the electrical connection between the energy storage converter 300 and the first control section 4021.

[0100] In this embodiment, by integrating the energy storage converter 300 with the corresponding first control part 4021, the integration of the first control part 4021 and the energy storage converter 300 is improved, and the setup difficulty of the first control part 4021 and the energy storage converter 300 is reduced.

[0101] In some embodiments, please refer to Figure 10 , Figure 10 This is an exploded view of a sidewall 112 provided in some embodiments of this application. The sidewall 112 includes a frame 1122 and an air inlet plate 1123. The air inlet plate 1123 is detachably connected to the frame 1122, and an air inlet 1121 is disposed on the air inlet plate 1123.

[0102] The frame 1122 may include multiple side frames 11221, which form a frame structure. The side frames 11221 of the frame 1122 can be integrally formed, for example, by integral casting; alternatively, the side frames 11221 can be separately arranged and connected, for example, by bolts; or the side frames 11221 can be individually connected to the side beams of the cabinet 10 to form the frame 1122. The side frames 11221 and the side beams of the cabinet 10 can be welded, bolted, or connected in other ways. The material of the frame 1122 can be aluminum, steel, aluminum alloy, etc.

[0103] The air inlet plate 1123 can be connected to the frame 1122 by snap-fit, pin-fit, or fastener; the fastener can be a bolt. Each side wall 112 air inlet plate 1123 can be provided with an air inlet 1121.

[0104] In this embodiment, the air inlet plate 1123 and the frame 1122 are detachably connected, and the air inlet 1121 is set on the air inlet plate 1123, which is conducive to the replacement of the air inlet plate 1123 and the maintenance of the air inlet 1121. It is also convenient for the maintenance and repair of the thermal management module 30 in the first sub-compartment 11, thereby improving the stability of the thermal management module 30.

[0105] In some embodiments, please refer to Figure 11 , Figure 11 for Figure 10 A partial enlarged view of region A. The air inlet 1121 includes a plurality of air inlet holes 11211 spaced apart from the air inlet plate 1123.

[0106] Multiple air inlets 11211 can be arrayed on the air inlet plate 1123. The air inlets 11211 can be circular, polygonal, etc. For example... Figure 11 As shown, the air inlet plate 1123 is provided with multiple air inlet holes 11211, and the air inlet holes 11211 are hexagonal through holes.

[0107] In this embodiment, by providing multiple air inlets 11211 on the air inlet plate 1123, the multiple air inlets 11211 can make the air intake of the first sub-compartment 11 more uniform, and the air inlets 11211 can make the air intake of the first sub-compartment 11 smaller in size, reducing the risk of impurities entering the first sub-compartment 11.

[0108] In some embodiments, the maximum inscribed circle diameter of the air inlet 11211 is less than or equal to 10 mm.

[0109] The air inlet 11211 can be a round hole, the diameter of which is the maximum inscribed circle diameter of the air inlet 11211; the air inlet 11211 can also be a polygonal hole, for example, the air inlet 11211 is a regular hexagonal hole, the maximum inscribed circle diameter of the regular hexagonal hole is less than or equal to 10mm.

[0110] The air inlet can also be a strip-shaped hole. The strip-shaped hole extends along its own length direction and connects the outside of the first sub-compartment 11 and the cabinet 10 along its depth direction. The dimension of the strip-shaped hole along its own width direction is the maximum inscribed circle diameter of the air inlet 11211. The dimension of the strip-shaped hole in the length direction is greater than the dimension of the strip-shaped hole in the width direction.

[0111] The maximum inscribed circle diameters of multiple air inlets 11211 can be equal or unequal. The maximum inscribed circle diameter of the air inlet 11211 can be any one of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm, or any value between two of them.

[0112] In this embodiment, by setting the maximum inscribed circle diameter of the air inlet 11211 to be less than or equal to 10 mm, the risk of biological invasion into the first sub-compartment 11 can be reduced, making the operation of the thermal management module 30 more stable.

[0113] In some embodiments, the opening ratio of the air inlet plate 1123 is 30%-95%.

[0114] Along the thickness direction of the air inlet plate 1123, the air inlet plate 1123 has two opposite outer surfaces, and the air inlet holes 11211 penetrate through the two outer surfaces of the air inlet plate 1123. The ratio of the sum of the flow areas of all the air inlet holes 11211 on the air inlet plate 1123 to the area of ​​one outer surface of the air inlet plate 1123 is the opening ratio of the air inlet plate 1123.

[0115] The opening ratio of the air inlet plate 1123 can be any one of 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or any value between two of them.

[0116] In this embodiment, the opening ratio of the air intake plate 1123 is greater than or equal to 30%, which enables the air intake plate 1123 to have a large air intake volume, thereby improving the heat dissipation effect of the thermal management module 30; the opening ratio of the air intake plate 1123 is less than or equal to 95%, which can improve the strength of the air intake plate 1123 and reduce the risk of damage to the air intake plate 1123; therefore, the opening ratio of the air intake plate 1123 is 30%-95%, which can balance improving the air intake volume and the strength of the air intake plate 1123, improving the heat dissipation effect of the thermal management module 30 and reducing the risk of damage to the air intake plate 1123.

[0117] In some embodiments, the opening ratio of the air inlet plate 1123 is 60%-80%.

[0118] The opening ratio of the air inlet plate 1123 can be any one of 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, or any value between two of them.

[0119] In this embodiment, the opening ratio of the air intake plate 1123 is greater than or equal to 60%, which can further increase the air intake volume of the air intake plate 1123, thereby further improving the heat dissipation effect of the thermal management module 30; the opening ratio of the air intake plate 1123 is less than or equal to 80%, which can further increase the strength of the air intake plate 1123 and reduce the risk of damage to the air intake plate 1123; therefore, the opening ratio of the air intake plate 1123 is 60%-80%, which can further balance increasing the air intake volume and the strength of the air intake plate 1123, improving the heat dissipation effect of the thermal management module 30 and reducing the risk of damage to the air intake plate 1123.

[0120] In some embodiments, please continue to refer to Figure 5 At least one sidewall 112 includes a plurality of air inlet plates 1123, and at least two air inlet plates 1123 of the sidewall 112 are arranged along the height direction Z.

[0121] The sidewall 112 may have only one sidewall 112 including multiple air inlet panels 1123; it may have two sidewalls 112, each including multiple air inlet panels 1123; or each sidewall 112 may include multiple air inlet panels 1123. In the sidewall 112 including multiple air inlet panels 1123, the number of air inlet panels 1123 can be two, three, four, five, six, etc. There may be only two air inlet panels 1123 arranged along the height direction Z; or there may be three or more air inlet panels 1123 arranged along the height direction Z. For example, please refer to... Figure 5 In the side wall 112 of the thermal management module 30 located on the side opposite to the second compartment 2 along the length direction X of the cabinet 10, the side wall 112 includes three air inlet plates 1123, two of which are arranged along the width direction Y of the cabinet 10, and one air inlet plate 1123 is located below the two air inlet plates 1123.

[0122] In this embodiment, by setting the air inlet plates 1123 of the side wall 112 to be arranged along the height direction Z, the lower air inlet plates 1123 are positioned lower, which is conducive to the disassembly and maintenance of the air inlet plates 1123, and also helps to reduce the maintenance difficulty of the thermal management module 30 in the first sub-compartment 11.

[0123] In some embodiments, please refer to Figure 12 , Figure 12 This is a structural schematic diagram of an energy storage device 100 provided in some other embodiments of this application. The cabinet 10 has a first surface 3, which is the surface of the cabinet 10 furthest from the first top wall 111 along the height direction Z. The minimum distance between the first surface 3 and the air inlet plate 1123 closest to the first surface 3 is less than or equal to 1800mm.

[0124] The cabinet 10 may include horizontal beams, vertical beams, and elongated beams. The horizontal beams extend along the length direction X, the vertical beams extend along the width direction Y, and the elongated beams extend along the height direction Z. The four horizontal beams, four vertical beams, and four elongated beams form the frame structure of the cabinet 10. In some embodiments, the horizontal beams, vertical beams, and elongated beams are all edge beams. The first surface 3 may be the surface where the vertical beams are located at the bottom.

[0125] The minimum distance between the first surface 3 and the air inlet plate 1123 closest to the first surface 3 can be H. H can be any one of 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, 800mm, 850mm, 900mm, 950mm, 1000mm, 1050mm, 1100mm, 1150mm, 1200mm, 1250mm, 1300mm, 1350mm, 1400mm, 1450mm, 1500mm, 1550mm, 1600mm, 1650mm, 1700mm, 1750mm, and 1800mm, any two of them, or a value less than 500mm.

[0126] In this embodiment, by setting the minimum distance between the first surface 3 and the air inlet plate 1123 closest to the first surface 3 to be less than or equal to 1800mm, the height of the air inlet plate 1123 is relatively low, which is conducive to the disassembly and assembly of the air inlet plate 1123 and reduces the maintenance difficulty of the air inlet plate 1123 and the thermal management module 30.

[0127] In some embodiments, please continue to refer to Figure 5 , Figure 6 and Figure 7 And further refer to Figure 13 , Figure 13 for Figure 5 A partial enlarged view of area B. The three side walls 112 include a first side wall 112a. The cabinet 10 also includes a first side beam 4, a second side beam 5, a first partition 6, and a second partition 7. The first side wall 112a, the first side beam 4, and the second side beam 5 are located on the same side of the thermal management module 30 along the width direction Y. The first side beam 4 extends along the height direction Z, and the second side beam 5 extends along the length direction X. The second side beam 5 is connected to the first side beam 4 and is located at the top of the cabinet 10. The first partition 6 separates the first compartment 1 and the second compartment 2, and the second partition 7 separates the first sub-compartment 11 and the second sub-compartment 12. The first side wall 112a is connected to the first partition 6, the second partition 7, the first side beam 4, and the second side beam 5.

[0128] The first partition 6, the second partition 7, the first side beam 4, and the second side beam 5 can be connected to the frame 1122 of the first side wall 112a, or they can be connected to the air inlet plate 1123 of the first side wall 112a.

[0129] The first partition 6 separates the first compartment 1 and the second compartment 2, and the second partition 7 separates the first sub-compartment 11 and the second sub-compartment 12 of the first compartment 1, thereby dividing the accommodating space of the cabinet 10 into three parts. The first partition 6, the second partition 7, the first side beam 4, and the second side beam 5 can be welded to the frame 1122 of the first side wall 112a, or connected by fasteners, such as bolts.

[0130] In some embodiments, the first surface 3 is the bottom surface of the first side beam 4.

[0131] In this embodiment, by connecting the frame 1122 of the first sidewall 112a to the first partition 6, the second partition 7, the first side beam 4, and the second side beam 5, the first side beam 4 and the second side beam 5 have higher strength, which can improve the stability of the frame 1122 of the first sidewall 112a, making the installation of the air inlet plate 1123 more stable.

[0132] In some embodiments, please continue to refer to Figure 5 , Figure 6 , Figure 7 and Figure 13 Along the width direction Y, the first side beam 4 has a second surface 41 facing away from the first sub-compartment 11, and the first sidewall 112a does not protrude from the second surface 41.

[0133] In the first sidewall 112a, along the width direction Y, the frame 1122 may be located outside the air inlet plate 1123, or the frame 1122 may be located inside the air inlet plate 1123.

[0134] The second surface 41 is part of the outer surface of the cabinet 10, and the second surface 41 is the outermost surface of the first side beam 4 along the width direction Y of the cabinet 10. The first side wall 112a has a first outer surface 1124 that is away from the thermal management module 30 along the width direction Y. The first outer surface 1124 is the surface of the first side wall 112a that is furthest away from the thermal management module 30. The first outer surface 1124 may be flush with the second surface 41, or the first outer surface 1124 may be closer to the thermal management module 30 than the second surface 41.

[0135] In this embodiment, by setting the first sidewall 112a to not protrude from the second surface 41 along the width direction Y, the risk of the first sidewall 112a being damaged by contact with external equipment can be reduced, the structural stability of the first sidewall 112a can be improved, and the air intake and exhaust of the first sub-compartment 11 can be made more stable.

[0136] In some embodiments, please continue to refer to Figure 5 , Figure 6 and Figure 14 , Figure 14 for Figure 5A partial enlarged view of area C. The three side walls 112 include a second side wall 112b. The cabinet 10 also includes a first side beam 4, a third side beam 8, a fourth side beam 9, and a second partition 7. The first side beam 4, the third side beam 8, and the fourth side beam 9 are located on the same side of the thermal management module 30 along the length direction X. The first side beam 4 and the fourth side beam 9 extend along the height direction Z, and the third side beam 8 extends along the width direction Y. The third side beam 8 connects the first side beam 4 and the fourth side beam 9 and is located at the top of the cabinet 10. The second partition 7 separates the first sub-compartment 11 and the second sub-compartment 12. The second side wall 112b is connected to the first side beam 4, the third side beam 8, the fourth side beam 9, and the second partition 7.

[0137] The first side beam 4, the third side beam 8, the fourth side beam 9, and the second partition 7 can be connected to the frame 1122 of the second side wall 112b, or to the air inlet plate 1123 of the second side wall 112b.

[0138] The first side beam 4, the third side beam 8, the fifth surface 72, and the second partition 7 can be welded to the frame 1122 of the second side wall 112b, or connected with fasteners, etc., and the fasteners can be bolts. The first side beam 4 and the fourth side beam 9 are the vertical beams of the cabinet 10, the third side beam 8 is the longitudinal beam, and the second side beam 5 is the transverse beam.

[0139] In this embodiment, by connecting the frame 1122 of the second sidewall 112b to the first side beam 4, the third side beam 8, the fourth side beam 9, and the second partition 7, the first side beam 4, the third side beam 8, and the fourth side beam 9 have high strength, which can improve the stability of the frame 1122 of the second sidewall 112b, making the installation of the air inlet plate 1123 more stable.

[0140] In some embodiments, please continue to refer to Figure 14 Along the length direction X, the first side beam 4 has a third surface 42 facing away from the first sub-compartment 11, the fourth side beam 9 has a fourth surface 91 facing away from the first sub-compartment 11, and the second side wall 112b does not protrude from the third surface 42 and the fourth surface 91.

[0141] In the second sidewall 112b, along the length direction X, the frame 1122 can be located outside the air inlet plate 1123, or the frame 1122 can be located inside the air inlet plate 1123.

[0142] The third surface 42 is part of the outer surface of the cabinet 10. The third surface 42 can be the outermost surface of the first side beam 4 along the length direction X of the cabinet 10. The second side wall 112b has a second outer surface 1125 that is away from the thermal management module 30 along the length direction X. The second outer surface 1125 is the surface of the second side wall 112b that is furthest away from the thermal management module 30. The second outer surface 1125 can be flush with the third surface 42, or the second outer surface 1125 can be closer to the thermal management module 30 than the third surface 42.

[0143] The fourth surface 91 is part of the outer surface of the cabinet 10. The fourth surface 91 can be the outermost surface of the fourth side beam 9 along the length X of the cabinet 10. It can be that the second outer surface 1125 is flush with the fourth surface 91, or the second outer surface 1125 is closer to the thermal management module 30 than the fourth surface 91. The second sidewall 112b does not protrude from the third surface 42, nor from the fourth surface 91.

[0144] In this embodiment, by setting the second sidewall 112b to not protrude from the third surface 42 along the length direction X, the risk of the second sidewall 112b being damaged by contact with external equipment can be reduced, the structural stability of the second sidewall 112b can be improved, and the air intake and exhaust of the first sub-compartment 11 can be made more stable.

[0145] In some embodiments, please continue to refer to Figure 5 and refer to Figure 15 , Figure 15 for Figure 5 A partial enlarged view of area D in the middle. The cabinet 10 includes a second partition 7, which separates the first sub-compartment 11 and the second sub-compartment 12. A flow channel 71 is provided inside the second partition 7, which connects the internal space of the first sub-compartment 11 with the external space of the cabinet 10.

[0146] The second partition 7 is located at the bottom of the first sub-compartment 11 and supports the thermal management module 30. The number of flow channels 71 can be one or more. The second partition 7 has a first top surface 73 facing the thermal management module 30, and the flow channels 71 have opposite ends. One end of the flow channel 71 extends to the first top surface 73, and the other end of the flow channel 71 communicates with the external space of the cabinet 10.

[0147] In this embodiment, by providing a flow channel 71 in the second partition 7, the flow channel 71 can provide airflow to the first sub-compartment 11, and the first sub-compartment 11 can also discharge the accumulated water in the first sub-compartment 11 through the flow channel 71, thereby improving the performance of the thermal management module 30.

[0148] In some embodiments, please continue to refer to Figure 5Along the length direction X, the second partition 7 has a fifth surface 72 that is opposite to the second compartment 2. The fifth surface 72 is part of the outer surface of the cabinet 10, and the flow channel 71 extends to the fifth surface 72.

[0149] The flow channel 71 extends to the fifth surface 72 so that the flow channel 71 can communicate with the external space of the cabinet 10.

[0150] In this embodiment, by extending the flow channel 71 to the fifth surface 72, the flow channel 71 can drain the water accumulated in the first sub-compartment 11 into the cabinet 10 through the fifth surface 72 of the second separator 7, thereby reducing the impact of the water accumulation on the thermal management module 30.

[0151] In some embodiments, please continue to refer to Figure 5 The flow channel 71 forms an opening 721 on the fifth surface 72. The energy storage device 100 also includes a flow guide 50, which is located outside the cabinet 10 along the length direction X. The flow guide 50 is located on the side of the first compartment 1 away from the second compartment 2. The flow guide 50 extends along the width direction Y and along the height direction Z. The flow guide 50 is located below the opening 721.

[0152] The flow guide 50 is located below the opening 721. The flow guide 50 can be connected to the second partition 7 or the second sub-compartment 12. The flow guide 50 can guide the flow of fluid exiting the opening 721 so that the fluid discharged from the first sub-compartment 11 is moved away from the housing 201. The fluid can be rainwater.

[0153] In this embodiment, the guide member 50 can guide the water flowing out of the flow channel 71 away from the cabinet 10, reducing the impact of the water on the structure of the cabinet 10, such as the second sub-compartment 12, i.e., the components inside the cabinet 10.

[0154] This application provides an energy storage system 2000, including an energy storage converter 300 and an energy storage device 100 provided in any of the above embodiments, wherein the energy storage converter 300 is electrically connected to the energy storage device 100.

[0155] This application provides a charging network 1000, including a charging pile 200 and an energy storage device 100 provided in any of the above embodiments. The energy storage device 100 is used to provide electrical energy to the charging pile 200.

[0156] Please continue to refer to Figure 5 , Figure 6 , Figure 7 , Figure 10 , Figure 12 , Figure 13 , Figure 14 and Figure 15This application provides an energy storage device 100, including a cabinet 10, a battery device 20, a thermal management module 30, and a control module 40. The cabinet 10 includes a first compartment 1 and a second compartment 2 arranged along the length X of the cabinet 10. The first compartment 1 includes a first sub-compartment 11 and a second sub-compartment 12, with the first sub-compartment 11 located above the second sub-compartment 12. The battery device 20 is housed in the second compartment 2. The thermal management module 30 is housed in the first sub-compartment 11 and is used to manage the temperature of the battery device 20. The control module 40 is housed in the second sub-compartment 12 and is used to perform electrical control on the battery device 20. The first sub-compartment 11 includes a first top wall 111 and three side walls 112. The first top wall 111 is located on the side of the thermal management module 30 facing away from the second sub-compartment 12 along the height direction Z of the cabinet 10. All three side walls 112 are connected to the first top wall 111. Two of the three side walls 112 are arranged opposite each other along the width direction Y of the cabinet 10, and the other side wall 112 is located on the side of the thermal management module 30 facing away from the second compartment 2 along the length direction X of the cabinet 10. The first top wall 111 is provided with an air outlet 1111, and all three side walls 112 are provided with air inlets 1121. The side wall 112 includes a frame 1122 and an air inlet plate 1123. The air inlet plate 1123 is detachably connected to the frame 1122, and the air inlet 1121 is provided on the air inlet plate 1123. The cabinet 10 has a first surface 3, which is the surface of the cabinet 10 furthest from the first top wall 111 along the height direction Z. The minimum distance between the first surface 3 and the air inlet plate 1123 closest to the first surface 3 is less than or equal to 1800mm. The cabinet 10 includes a second partition 7, which separates the first sub-compartment 11 and the second sub-compartment 12. A flow channel 71 is provided in the second partition 7, which connects the internal space of the first sub-compartment 11 with the external space of the cabinet 10.

[0157] In such an energy storage device 100, by providing an air outlet 1111 on the first top wall 111 and air inlets 1121 on each of the three side walls 112, the first sub-compartment 11 can receive airflow through the air inlets 1121 on the three side walls 112 and discharge airflow through the air outlet 1111 on the first top wall 111. On the one hand, the air outlet 1111 is located above the air inlets 1121, allowing the airflow in the first sub-compartment 11 to be discharged upwards, reducing the risk of the airflow discharged from the first sub-compartment 11 flowing back to the air inlets 1121 and affecting the air intake temperature of the first sub-compartment 11. On the other hand, the air inlets 1121 on each of the three side walls 112 can increase the air intake of the first sub-compartment 11, thereby enabling the thermal management module 30 in the first sub-compartment 11 to have more ventilation, improving the ventilation and heat dissipation effect of the thermal management module 30, reducing the risk of thermal runaway of the battery device 20 in the energy storage device 100, and improving the reliability of the energy storage device 100. The air inlet plate 1123 and the frame 1122 are detachably connected, and the air inlet 1121 is located on the air inlet plate 1123. This facilitates the replacement of the air inlet plate 1123 and the maintenance of the air inlet 1121, and also facilitates the maintenance and repair of the thermal management module 30 in the first sub-compartment 11, improving the operational stability of the thermal management module 30. By setting the minimum distance between the first surface 3 and the air inlet plate 1123 closest to the first surface 3 to be less than or equal to 1800mm, the height of the air inlet plate 1123 is relatively low, which facilitates the disassembly and assembly of the air inlet plate 1123 and reduces the maintenance difficulty of the air inlet plate 1123 and the thermal management module 30. The guide member 50 can guide the water flowing out of the flow channel 71 away from the cabinet 10, reducing the impact of water accumulation on the structure of the cabinet 10, such as the second sub-compartment 12, i.e., the components inside the cabinet 10.

[0158] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0159] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, characterized in that, include: The cabinet includes a first compartment and a second compartment arranged along the length of the cabinet. The first compartment includes a first sub-compartment and a second sub-compartment, and the first sub-compartment is located above the second sub-compartment. The battery assembly is housed in the second compartment; A thermal management module, at least partially housed in the first sub-compartment, is used to manage the temperature of the battery device; A control module, at least partially housed in the second sub-compartment, is used for electrical control of the battery device; The first sub-compartment has a first top wall and three side walls. The first top wall is located on the side of the thermal management module away from the second sub-compartment along the height direction of the cabinet. The three side walls are all connected to the first top wall. Two of the three side walls are arranged opposite each other along the width direction of the cabinet, and the other side wall is located on the side of the thermal management module away from the second compartment along the length direction of the cabinet. The first top wall is provided with an air outlet, and the three side walls are provided with air inlets.

2. The energy storage device as described in claim 1, characterized in that, The sidewall includes a frame and an air inlet plate, the air inlet plate being detachably connected to the frame, and the air inlet being disposed on the air inlet plate.

3. The energy storage device as described in claim 2, characterized in that, The air inlet includes a plurality of air inlet holes spaced apart on the air inlet plate.

4. The energy storage device as described in claim 3, characterized in that, The maximum inscribed circle diameter of the air inlet is less than or equal to 10 mm.

5. The energy storage device as described in claim 3, characterized in that, The opening ratio of the air inlet plate is 30%-95%.

6. The energy storage device as described in claim 5, characterized in that, The opening ratio of the air inlet plate is 60%-80%.

7. The energy storage device as described in claim 2, characterized in that, At least one of the sidewalls includes a plurality of the air inlet plates, and at least two of the air inlet plates of the sidewall are arranged along the height direction.

8. The energy storage device as described in claim 7, characterized in that, The cabinet has a first surface, which is the surface of the cabinet furthest from the first top wall along the height direction, and the minimum distance between the first surface and the air inlet plate closest to the first surface is less than or equal to 1800mm.

9. The energy storage device as described in claim 1, characterized in that, The three sidewalls include a first sidewall, and the cabinet also includes a first side beam, a second side beam, a first partition, and a second partition. The first sidewall, the first side beam, and the second side beam are located on the same side of the thermal management module along the width direction. The first side beam extends along the height direction, and the second side beam extends along the length direction. The second side beam is connected to the first side beam and is located at the top of the cabinet. The first partition separates the first compartment and the second compartment, and the second partition separates the first sub-compartment and the second sub-compartment. The first sidewall is connected to the first partition, the second partition, the first side beam, and the second side beam.

10. The energy storage device as described in claim 9, characterized in that, Along the width direction, the first side beam has a second surface facing away from the first sub-compartment, and the first sidewall does not protrude from the second surface.

11. The energy storage device as claimed in claim 1, characterized in that, The three side walls include a second side wall. The cabinet also includes a first side beam, a third side beam, a fourth side beam, and a second partition. The first side beam, the third side beam, and the fourth side beam are located on the same side of the thermal management module along the length direction. The first side beam and the fourth side beam extend along the height direction. The third side beam extends along the width direction. The third side beam connects the first side beam and the fourth side beam and is located at the top of the cabinet. The second partition separates the first sub-compartment and the second sub-compartment. The second side wall is connected to the first side beam, the third side beam, the fourth side beam, and the second partition.

12. The energy storage device as described in claim 11, characterized in that, Along the length direction, the first side beam has a third surface facing away from the first sub-compartment, the fourth side beam has a fourth surface facing away from the first sub-compartment, and the second sidewall does not protrude from the third surface and the fourth surface.

13. The energy storage device as described in any one of claims 1-12, characterized in that, The cabinet includes a second partition that separates the first sub-compartment and the second sub-compartment. The second partition has a flow channel that connects the first sub-compartment to the external space of the cabinet.

14. The energy storage device as described in claim 13, characterized in that, Along the length direction, the second partition has a fifth surface facing away from the second compartment, the fifth surface being part of the outer surface of the cabinet, and the flow channel extending to the fifth surface.

15. The energy storage device as described in claim 14, characterized in that, The flow channel forms an opening on the fifth surface. The energy storage device also includes a flow guide located outside the cabinet along the length direction. The flow guide is located on the side of the first compartment away from the second compartment. The flow guide extends along the width direction and is located below the opening along the height direction.

16. An energy storage system, characterized in that, include: The energy storage device as described in any one of claims 1-15; An energy storage converter is electrically connected to the energy storage device.

17. A charging network, characterized in that, include: Charging stations; The energy storage device as described in any one of claims 1-15 is used to provide electrical energy to the charging pile.

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