Energy storage device and energy storage system

Abstract

The embodiment of the utility model provides an energy storage device and an energy storage system. The use performance of the energy storage system can be improved. The energy storage device comprises a first wall, a containing cavity and a connecting structure, the first wall comprises a first through hole penetrating in the thickness direction of the first wall, the containing cavity is used for containing a battery device, the connecting structure is detachably connected with the first wall and communicates with the containing cavity through the first through hole, and an inlet is formed in the end, away from the containing cavity, of the connecting structure; an outlet is formed in the end, facing the containing cavity, of the connecting structure.

Description

Technical Field

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

[0002] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. Energy storage devices, due to their advantages such as high energy density and long lifespan, are increasingly being used across various fields.

[0003] Currently, fire suppression systems used in energy storage devices are typically located inside the device and are fixedly connected within it. This makes subsequent maintenance of the fire suppression system inconvenient, and replacing fire nozzles is also quite difficult. Therefore, reducing the maintenance costs of fire suppression systems in energy storage devices to improve the performance of the devices has become a pressing technical problem in this field. Utility Model Content

[0004] This application provides an energy storage device and an energy storage system that can improve the performance of the energy storage system.

[0005] In a first aspect, this application provides an energy storage device, which includes: a first wall including a first through hole extending along the thickness direction of the first wall; a receiving cavity for receiving a battery device; and a connecting structure detachably connected to the first wall, the connecting structure communicating with the receiving cavity through the first through hole, an inlet being provided at one end of the connecting structure away from the receiving cavity, and an outlet being provided at one end of the connecting structure facing the receiving cavity.

[0006] In this embodiment, a first through hole is provided in the first wall of the energy storage device, extending along the thickness direction of the first wall. The connecting structure is detachably connected to the first wall and communicates with the receiving cavity through the first through hole. An inlet is provided at the end of the connecting structure away from the receiving cavity, and an outlet is provided at the end of the connecting structure facing the receiving cavity. Compared with the prior art, which fixes the connecting structure inside the energy storage device, the connecting structure of this application can be detachably connected to the first wall, which facilitates the maintenance and replacement of the connecting structure, reduces the maintenance cost of the connecting structure, and thus improves the performance of the energy storage device.

[0007] In some embodiments, a portion of the connecting structure protrudes through the first through-hole from the first surface of the first wall facing the receiving cavity.

[0008] In this embodiment of the application, a portion of the connecting structure is configured to protrude through the first through hole onto the first surface of the first wall facing the receiving cavity. This allows fire-fighting liquid or fire-fighting gas from the external pipeline to smoothly enter the receiving cavity through the connecting structure when the connecting structure is connected to an external pipeline, thereby reducing the risk of leakage of fire-fighting liquid or fire-fighting gas from the external pipeline and improving the performance of the energy storage device.

[0009] In some embodiments, the energy storage device further includes: a connecting portion disposed on a second surface of the first wall away from the receiving cavity, the connecting portion including a second through hole extending along the thickness direction of the first wall, the second through hole communicating with the first through hole; wherein the connecting structure is detachably connected to the first wall through the connecting portion.

[0010] In this embodiment, the energy storage device is further provided with a connecting portion disposed on the second surface of the first wall away from the receiving cavity. The connecting portion includes a second through hole extending along the thickness direction of the first wall and communicating with the first through hole. The connecting structure is detachably connected to the first wall through the connecting portion, thereby reducing the impact on the internal space of the energy storage device during the connection process between the connecting structure and the first wall. At the same time, it facilitates the maintenance and replacement of the connecting structure, reduces the maintenance cost of the connecting structure, and thus improves the performance of the energy storage device.

[0011] In some embodiments, the connecting structure includes a main body and a first extension, the first extension being connected to the outer periphery of the main body, a portion of the main body passing sequentially through the second through hole and the first through hole, the first extension being detachably connected to the connecting portion, the inlet being provided at the end of the main body away from the receiving cavity, and the outlet being provided at the end of the main body facing the receiving cavity.

[0012] In this embodiment, the connection structure is configured to include a main body and a first extension, the first extension being connected to the outer periphery of the main body. A portion of the main body passes sequentially through the second through hole and the first through hole. The first extension is detachably connected to the connection portion. The end of the main body away from the receiving cavity is provided with the inlet, and the end of the main body facing the receiving cavity is provided with the outlet. That is, the first extension of the connection structure is detachably connected to the first wall through the connection portion, which effectively reduces the impact on the internal space of the energy storage device during the connection process between the connection structure and the first wall. At the same time, it facilitates the maintenance and replacement of the connection structure, reduces the maintenance cost of the connection structure, and thus improves the performance of the energy storage device.

[0013] In some embodiments, the connection structure further includes a second extension that is connected to the outer periphery of the first extension and extends toward the receiving cavity. On a plane perpendicular to the thickness direction of the first wall, the orthographic projection of the second extension is located outside the orthographic projection of the connection.

[0014] In this embodiment, by configuring the connecting structure to include a second extension, which is connected to the outer periphery of the first extension and extends toward the receiving cavity, the orthographic projection of the second extension is located outside the orthographic projection of the connecting portion on a plane perpendicular to the thickness direction of the first wall. This facilitates the assembly of the connecting structure to the side of the connecting portion away from the receiving cavity, while reducing the displacement of the connecting structure on a plane perpendicular to the thickness direction of the first wall, thereby improving the assembly performance of the connecting structure and thus improving the assembly performance of the energy storage device.

[0015] In some embodiments, the orthographic projection of the first through hole overlaps the orthographic projection of the second through hole on a plane perpendicular to the thickness direction of the first wall.

[0016] In this embodiment of the application, on a plane perpendicular to the thickness direction of the first wall, the orthographic projection of the first through hole is set to cover the orthographic projection of the second through hole, so that a part of the main body of the connecting structure can smoothly enter the receiving cavity through the second through hole and the first through hole in sequence, so as to facilitate the assembly of the connecting structure, thereby improving the assembly performance and usage performance of the energy storage device.

[0017] In some embodiments, the main body includes a third through hole extending along the thickness direction of the first wall, the third through hole including a first hole segment away from the receiving cavity, the first hole segment being threadedly connected to an external pipeline.

[0018] In this embodiment, by configuring the main body to include a third through hole extending along the thickness direction of the first wall, and the third through hole including a first hole segment away from the receiving cavity, and the first hole segment being threadedly connected to the external pipeline, compared with the prior art technical solution of external pipeline and external threaded connection between the external pipeline and the connecting structure, the external pipeline and the first hole segment in this application are connected by threads, which can effectively reduce the risk of corrosion of the connecting structure due to contact with external air, and facilitate the maintenance and replacement of the connecting structure, thereby improving the performance of the energy storage device.

[0019] In some embodiments, the third through hole further includes a second orifice near the receiving cavity, the second orifice being threadedly connected to the nozzle structure.

[0020] In this embodiment, the third through hole is configured to include a second hole section near the receiving cavity, which is threadedly connected to the nozzle structure. This facilitates the installation and disassembly of the connection structure and the nozzle structure. Compared with the prior art's external threaded connection between the nozzle structure and the connection structure, this effectively reduces the risk of corrosion of the connection structure, thereby improving the performance of the energy storage device.

[0021] In some embodiments, the main body and the first extension are integrally formed by stamping.

[0022] In this embodiment, the main body and the first extension are integrally formed by stamping to balance the manufacturing cost and structural strength of the connection structure, thereby improving the performance of the energy storage device.

[0023] In some embodiments, the energy storage device further includes a sealing structure disposed between the connecting portion and the first extension portion, the sealing structure including a fourth through hole extending along the thickness direction of the first wall, the fourth through hole communicating with the second through hole.

[0024] In this embodiment, the energy storage device is further provided with a sealing structure disposed between the connecting portion and the first extension portion, and the sealing structure includes a fourth through hole extending along the thickness direction of the first wall, which communicates with the second through hole, so as to improve the sealing performance between the connecting structure and the connecting portion, thereby improving the performance of the energy storage device.

[0025] In some embodiments, the orthographic projection of the fourth through hole overlaps with the orthographic projection of the second through hole on a plane perpendicular to the thickness direction of the first wall.

[0026] In this embodiment, on a plane perpendicular to the thickness direction of the first wall, the orthographic projection of the fourth through hole is set to overlap with the orthographic projection of the second through hole to facilitate the processing and manufacturing of the sealing structure. At the same time, it is convenient to place the sealing structure between the connecting part and the first extension part to improve the sealing performance between the connecting structure and the connecting part, thereby improving the performance of the energy storage device.

[0027] In some embodiments, when the inlet is not connected to an external pipeline, the energy storage device further includes a cover structure that covers the side of the connection structure away from the receiving cavity, and the orthographic projection of the cover structure covers the orthographic projection of the main body in a plane perpendicular to the thickness direction of the first wall.

[0028] In this embodiment, when the inlet is not connected to the external pipeline, the energy storage device is configured to also include a cover structure, which covers the side of the connecting structure away from the receiving cavity. On a plane perpendicular to the thickness direction of the first wall, the orthographic projection of the cover structure covers the orthographic projection of the main body. This reduces the risk of external impurities entering the energy storage device through the connecting structure when the inlet is not connected to the external pipeline, thereby improving the performance of the energy storage device.

[0029] In a second aspect, an energy storage system is provided, including the energy storage device described in the first aspect or its various implementations. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the structure of an energy storage device provided in another embodiment of this application.

[0033] Figure 3 This is a cross-sectional schematic diagram of a portion of the structure of an energy storage device provided in an embodiment of this application.

[0034] Figure 4 This is a cross-sectional schematic diagram of a portion of the structure of an energy storage device provided in another embodiment of this application.

[0035] Figure 5 This is a cross-sectional schematic diagram of a portion of the structure of an energy storage device provided in another embodiment of this application.

[0036] Figure 6 This is a cross-sectional schematic diagram of a portion of the structure of an energy storage device provided in another embodiment of this application.

[0037] Figure 7 This is a schematic diagram of the connection structure provided in one embodiment of this application.

[0038] Figure 8 This is a cross-sectional schematic diagram of a connection structure provided in an embodiment of this application.

[0039] Figure 9 This is a cross-sectional schematic diagram of the connection structure provided in another embodiment of this application.

[0040] Figure 10 This is a cross-sectional schematic diagram of a portion of the structure of an energy storage device provided in another embodiment of this application.

[0041] Figure 11 This is a cross-sectional schematic diagram of a portion of the structure of an energy storage device provided in another embodiment of this application.

[0042] Explanation of reference numerals in the attached drawings: 1-Energy storage device; 30-First wall; 110-Receiving cavity; 310-First through hole; 320-First surface; 330-Second surface; 40-Connecting structure; 410-Main body; 420-First extension; 421-Fifth through hole; 430-Second extension; 440-Inlet; 450-Outlet; 411-Third through hole; 412-First hole section; 413-Second hole section; 50-Connecting part; 510-Second through hole; 60-Sealing structure; 610-Fourth through hole; 70-Cover plate structure; 80-Nozzle structure; 90-Bolt component.

[0043] The accompanying drawings are not drawn to scale. Detailed Implementation

[0044] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0045] 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.

[0046] 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.

[0047] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0050] 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.

[0051] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0052] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0053] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0054] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery clusters may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0055] Energy storage devices 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 devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0056] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0057] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0058] In some embodiments, the energy storage device 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.

[0059] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0060] As an example, the main control module can serve as the battery management unit 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 instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes auxiliary battery management units, integrated switches, and other modules.

[0061] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an insulation monitoring module, a main battery management unit, and Ethernet and fiber optic conversion modules.

[0062] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0063] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0064] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. Energy storage devices, due to their high energy density and long service life, are increasingly being used across various fields. Currently, fire protection systems used in energy storage devices are typically located inside the device and are fixedly connected within it. For example, fire hoses are often welded to the inner wall of the device, which hinders subsequent maintenance and replacement of the fire protection system. Disassembling and replacing fire hoses is costly, and replacing fire nozzles is also difficult. Therefore, reducing the maintenance costs of fire protection systems in energy storage devices to improve the performance of these devices has become a pressing technical problem in this field.

[0065] Therefore, this application provides an energy storage device and an energy storage system. The energy storage device includes a first wall, a receiving cavity, and a connecting structure. The first wall includes a first through hole extending along its thickness direction. The receiving cavity is used to receive a battery device. The connecting structure is detachably connected to the first wall and communicates with the receiving cavity through the first through hole. An inlet is provided at the end of the connecting structure away from the receiving cavity, and an outlet is provided at the end of the connecting structure facing the receiving cavity. Thus, in this application embodiment, by providing a first through hole extending along the thickness direction of the first wall in the energy storage device, and by detachably connecting the connecting structure to the first wall and communicating with the receiving cavity through the first through hole, with an inlet at the end of the connecting structure away from the receiving cavity and an outlet at the end of the connecting structure facing the receiving cavity, compared to the prior art where the connecting structure is fixed inside the energy storage device, the connecting structure of this application can be detachably connected to the first wall. This facilitates the maintenance and replacement of the connecting structure, reduces the maintenance cost of the connecting structure, and thereby improves the performance of the energy storage device.

[0066] The technical solutions described in the embodiments of this application are applicable to energy storage devices of various types and sizes. For example, an energy storage device may be as follows: Figure 1 The energy storage container shown or such Figure 2 The energy storage cabinet is shown. The energy storage device 1 can be, for example, a regular cuboid structure, wherein the six faces of the cuboid are the six outer walls of the energy storage device. Setting the energy storage device 1 as a cuboid structure facilitates the fixed placement and transportation of the energy storage device 1. Of course, the energy storage device 1 can also be other shapes, for example, at least one wall of the energy storage device 1 can be inclined.

[0067] The energy storage device 1 provided in this application embodiment may include a battery compartment and an electrical compartment, the battery compartment being able to accommodate multiple battery devices. For example, the battery compartment may have multiple mounting positions for the battery devices arranged along the direction of gravity to accommodate multiple battery devices, and after the battery devices are installed into the mounting positions, they can be secured by a locking mechanism.

[0068] The battery device can be a power storage battery. In terms of the type of battery device, it can be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, or a sodium-ion battery, etc., and no specific limitation is made in the embodiments of this application.

[0069] In some implementations, at least one battery device is disposed within the battery compartment of the energy storage device 1. The battery compartment may include N rows of battery devices, each row of battery devices being divided into at least two parallel battery clusters, each battery cluster including at least one battery device, and N being greater than or equal to 1. For example, the battery compartment may include four rows of battery devices, each row of battery devices may be divided into two parallel battery clusters, each battery cluster may include four battery devices, and each battery device may include 104 battery cells connected in series.

[0070] For example, the battery compartment could also include two rows of battery units, each row consisting of four parallel battery clusters. In this case, each battery cluster could include two battery units, and each battery unit could include 104 battery cells connected in series. Alternatively, the battery compartment could include one row of battery units, each row consisting of eight parallel battery clusters. Or, each row of battery units could be divided into three parallel battery clusters.

[0071] One battery cluster can correspond to one slave battery management unit (SBMU), and multiple battery clusters can correspond to one master battery management unit (MBMU).

[0072] In some implementations, the energy storage device 1 is typically equipped with a gaseous fire suppression system or a liquid fire suppression system. Specifically, the energy storage device 1 is usually equipped with a temperature sensor, a gas sensor, or a smoke detector. When the temperature sensor detects that the internal temperature of the energy storage device 1 has reached a threshold, or when the gas sensor detects gases such as CO, H2, or VOCs inside the energy storage device 1, the gaseous or liquid fire suppression system inside the energy storage device 1 can be controlled to perform fire suppression on the battery device inside the energy storage device 1. In other implementations, the energy storage device 1 may also be equipped with a dry powder fire extinguishing device or an aerosol fire extinguishing device.

[0073] For example, the energy storage device 1 can be rectangular, but this embodiment is not limited to this, and the energy storage device 1 can also be configured with other shapes. In addition, in order to facilitate transportation and reduce transportation costs, the energy storage device 1 in this embodiment can be a standard-sized container, for example, a 20-foot or 40-foot container, but this embodiment is not limited to this.

[0074] Energy storage device 1 may include a thermal management module that houses thermal management components for thermal management of the energy storage device 1. For example, it may heat or cool the energy storage device 1. The thermal management module may regulate the temperature of at least one battery using air cooling, direct cooling, or liquid cooling. If the thermal management module regulates the temperature of at least one battery using liquid cooling, it may include a liquid cooling unit containing a fluid used to regulate the temperature of at least one battery. In this case, when the thermal management module is used to cool the temperature of at least one battery, it may also be referred to as a cooling component or cooling system, and its output fluid may be referred to as a cooling medium or cooling fluid. More specifically, it may be referred to as a coolant or cooling gas. The cooling medium may specifically be water, a mixture of water and ethylene glycol, etc.

[0075] Figure 3 A cross-sectional schematic diagram of a portion of the structure of an energy storage device 1 provided in an embodiment of this application is shown.

[0076] In some implementations, such as Figure 3 As shown, the energy storage device 1 includes: a first wall 30, a receiving cavity 110, and a connecting structure 40. The first wall 30 includes a first through hole 310 extending along the thickness direction of the first wall 30. The receiving cavity 110 is used to receive a battery device. The connecting structure 40 is detachably connected to the first wall 30. The connecting structure 40 communicates with the receiving cavity 110 through the first through hole 310. An inlet 440 is provided at the end of the connecting structure 40 away from the receiving cavity 110, and an outlet 450 is provided at the end of the connecting structure 40 facing the receiving cavity 110.

[0077] It should be understood that the first wall 30 in the embodiments of this application may be as follows. Figure 1 or Figure 2 Any wall on the energy storage device 1 shown in the figure, for example, the first wall 30 can be set as the wall with the largest area or the smallest area on the energy storage device 1. For example, the first wall 30 can be the top wall or the bottom wall of the energy storage device 1 along the direction of gravity.

[0078] It should also be understood that the accommodating cavity 110 in the embodiments of this application can be used to accommodate devices such as battery devices, thermal management modules, main control modules, central control modules, power distribution modules, and fire protection modules.

[0079] It should also be understood that the shape of the first through hole 310 in this embodiment can be set according to actual needs. For example, on a plane perpendicular to the thickness direction of the first wall 30, the cross-sectional shape of the first through hole 310 can be set as a circle, square, ellipse, or polygon, etc. For another example, the shape of the first through hole 310 can be matched according to the shape of the connecting structure 40.

[0080] It should also be understood that the detachable connection between the connecting structure 40 and the first wall 30 in the embodiments of this application can refer to a bolted connection or a snap-fit ​​connection between the connecting structure 40 and the first wall 30. It should also be understood that the connecting structure 40 can be directly or indirectly connected to the first wall 30; for example, the connecting structure 40 can achieve a detachable connection with the first wall 30 through other structures.

[0081] It should also be understood that the inlet 440 at the end of the connecting structure 40 away from the receiving cavity 110 in this embodiment can mean that the inlet 440 at the end of the connecting structure 40 away from the receiving cavity 110 can be threadedly connected to an external pipeline, which is used to supply fire-fighting liquid or fire-fighting gas to the interior of the energy storage device 1 through the inlet 440 of the connecting structure 40. The outlet 450 at the end of the connecting structure 40 facing the receiving cavity 110 can mean that the outlet 450 at the end of the connecting structure 40 facing the receiving cavity 110 can be threadedly connected to the nozzle structure 80, and the fire-fighting liquid or fire-fighting gas flowing into the connecting structure 40 through the external pipeline can be supplied to the interior of the energy storage device 1 through the nozzle structure 80 to perform fire-fighting treatment on the battery device in the receiving cavity 110.

[0082] It should also be understood that the fire-fighting gas in the embodiments of this application may include at least one of the following gases: heptafluoropropane, perfluorohexanone, carbon dioxide, nitrogen, argon, etc. The fire-fighting liquid in the embodiments of this application may be one of the following: fine water mist, water-based extinguishing agent, liquid carbon dioxide, etc.

[0083] In this embodiment, a first through hole 310 is provided in the first wall 30 of the energy storage device 1, extending along the thickness direction of the first wall 30. The connecting structure 40 is detachably connected to the first wall 30 and communicates with the receiving cavity 110 through the first through hole 310. An inlet 440 is provided at the end of the connecting structure 40 away from the receiving cavity 110, and an outlet 450 is provided at the end of the connecting structure 40 facing the receiving cavity 110. Compared with the prior art, which fixes the connecting structure 40 inside the energy storage device 1, the connecting structure 40 of this application can be detachably connected to the first wall 30, which facilitates the maintenance and replacement of the connecting structure 40, reduces the maintenance cost of the connecting structure 40, and thus improves the performance of the energy storage device 1.

[0084] Figure 4 A cross-sectional schematic diagram of a portion of the structure of an energy storage device 1 provided in another embodiment of this application is shown.

[0085] In some implementations, such as Figure 4 As shown, a portion of the connecting structure 40 protrudes through the first through hole 310 from the first surface 320 of the first wall 30 facing the receiving cavity 110.

[0086] For example, a portion of the connecting structure 40 can protrude through the first through hole 310 from the first surface 320 of the first wall 30 facing the receiving cavity 110, that is, a portion of the connecting structure 40 is located inside the receiving cavity 110.

[0087] In this embodiment, a portion of the connecting structure 40 is configured to protrude through the first through hole 310 onto the first surface 320 of the first wall 30 facing the receiving cavity 110. This allows fire-fighting liquid or fire-fighting gas from the external pipeline to smoothly enter the receiving cavity 110 through the connecting structure 40 when the connecting structure 40 is connected to an external pipeline, thereby reducing the risk of leakage of fire-fighting liquid or fire-fighting gas from the external pipeline and improving the performance of the energy storage device 1.

[0088] Figure 5 A cross-sectional schematic diagram of a portion of the structure of an energy storage device 1 provided in another embodiment of this application is shown.

[0089] In some implementations, such as Figure 5 As shown, the energy storage device 1 further includes: a connecting portion 50, a second surface 330 disposed on the side of the first wall 30 away from the receiving cavity 110, the connecting portion 50 including a second through hole 510 extending along the thickness direction of the first wall 30, the second through hole 510 communicating with the first through hole 310; wherein, the connecting structure 40 is detachably connected to the first wall 30 through the connecting portion 50.

[0090] It should be understood that the connection portion 50 in this embodiment of the application being disposed on the first surface 320 of the first wall 30 on the side away from the receiving cavity 110 can mean that the connection portion 50 and the first surface 320 are bonded or welded together.

[0091] It should also be understood that the shape of the second through hole 510 in this embodiment can be set according to actual needs. For example, on a plane perpendicular to the thickness direction of the first wall 30, the cross-sectional shape of the second through hole 510 can be set as a circle, square, ellipse, or polygon, etc. For another example, the shape of the second through hole 510 can be matched according to the shape of the connecting structure 40 or the first through hole 310.

[0092] It should also be understood that the detachable connection between the connecting structure 40 and the first wall 30 via the connecting part 50 in the embodiments of this application can refer to the bolted connection or snap-fit ​​connection between the connecting structure 40 and the connecting part 50.

[0093] In this embodiment, the energy storage device 1 is further provided with a connecting portion 50, which is disposed on the first surface 320 of the first wall 30 on the side away from the receiving cavity 110. The connecting portion 50 includes a second through hole 510 extending along the thickness direction of the first wall 30. The second through hole 510 communicates with the first through hole 310, and the connecting structure 40 is detachably connected to the first wall 30 through the connecting portion 50. This reduces the impact of the connecting structure 40 on the internal space of the energy storage device 1 during the connection process with the first wall 30, and facilitates the maintenance and replacement of the connecting structure 40, reducing the maintenance cost of the connecting structure 40, thereby improving the performance of the energy storage device 1.

[0094] In some implementations, such as Figure 5 As shown, the connecting structure 40 includes a main body 410 and a first extension 420. The first extension 420 is connected to the outer periphery of the main body 410. A portion of the main body 410 passes through the second through hole 510 and the first through hole 310 in sequence. The first extension 420 is detachably connected to the connecting part 50. An inlet 440 is provided at the end of the main body 410 away from the receiving cavity 110, and an outlet 450 is provided at the end of the main body 410 facing the receiving cavity 110.

[0095] It should be understood that in the embodiments of this application, the fact that a portion of the main body 410 can pass through the second through hole 510 and the first through hole 310 in sequence means that a portion of the main body 410 can protrude through the first through hole 310 from the first surface 320 of the first wall 30 facing the receiving cavity 110.

[0096] It should also be understood that the main body 410 and the first extension 420 in this embodiment can be integrally formed or separately formed. For example, when the main body 410 and the first extension 420 are integrally formed, they can be integrally formed by stamping. When the main body 410 and the first extension 420 are separately formed, they can be connected by welding.

[0097] It should also be understood that the detachable connection between the first extension 420 and the connecting portion 50 can mean that the first extension 420 and the connecting portion 50 can be connected by bolts or snap-fit. For example, as... Figure 8As shown, the first extension 420 and the connecting part 50 can be connected by a bolt component 90. The first extension 420 is provided with a fifth through hole 421 that penetrates the first extension 420. A portion of the bolt component 90 can pass through the fifth through hole 421 to achieve a bolt connection with the connecting part 50. Furthermore, the end of the bolt component 90 near the first wall 30 does not contact the second surface 330 of the first wall 30. This can reduce the impact of the connecting structure 40 on the internal space of the energy storage device 1 during the connection process with the first wall 30, improve the internal space utilization of the energy storage device 1, and at the same time reduce the impact of the connecting structure 40 on other structures inside the energy storage device 1.

[0098] In this embodiment, the connecting structure 40 is configured to include a main body 410 and a first extension 420. The first extension 420 is connected to the outer periphery of the main body 410. A portion of the main body 410 passes through the second through hole 510 and the first through hole 310 in sequence. The first extension 420 is detachably connected to the connecting part 50. The end of the main body 410 away from the receiving cavity 110 is provided with the inlet 440, and the end of the main body 410 facing the receiving cavity 110 is provided with the outlet 440. That is, the first extension 420 of the connecting structure 40 is detachably connected to the first wall 30 through the connecting part 50, so as to effectively reduce the impact of the connecting structure 40 on the internal space of the energy storage device 1 during the connection process between the connecting structure 40 and the first wall 30. At the same time, it facilitates the maintenance and replacement of the connecting structure 40, reduces the maintenance cost of the connecting structure 40, and improves the performance of the energy storage device 1.

[0099] Figure 6 A cross-sectional schematic diagram of a portion of the structure of an energy storage device 1 provided in another embodiment of this application is shown.

[0100] In some implementations, such as Figure 6 As shown, the connecting structure 40 also includes a second extension 430, which is connected to the outer periphery of the first extension 420 and extends toward the receiving cavity 110. On a plane perpendicular to the thickness direction of the first wall 30, the orthographic projection of the second extension 430 is located outside the orthographic projection of the connecting portion 50.

[0101] It should be understood that the second extension 430 in this embodiment can be integrally formed with the first extension 420 or formed separately. For example, when the second extension 430 is integrally formed with the first extension 420, the second extension 430 and the first extension 420 can be integrally formed by stamping, or the second extension 430, the first extension 420, and the main body 410 can be integrally stamped. When the second extension 430 is separately formed with the first extension 420, the second extension 430 and the first extension 420 can be connected by welding or bonding.

[0102] It should also be understood that the orthographic projection of the second extension 430 is located outside the orthographic projection of the connecting portion 50, so as to facilitate the assembly of the connecting structure 40 to the connecting portion 50 and reduce the displacement of the connecting structure 40 in the plane perpendicular to the thickness direction of the first wall 30.

[0103] In this embodiment, by configuring the connecting structure 40 to also include a second extension 430, and the second extension 430 being connected to the outer periphery of the first extension 420 and extending toward the receiving cavity 110, the orthographic projection of the second extension 430 is located outside the orthographic projection of the connecting portion 50 on a plane perpendicular to the thickness direction of the first wall 30, so as to facilitate the assembly of the connecting structure 40 to the side of the connecting portion 50 away from the receiving cavity 110, while reducing the displacement of the connecting structure 40 on a plane perpendicular to the thickness direction of the first wall 30, thereby improving the assembly performance of the connecting structure 40 and thus improving the assembly performance of the energy storage device 1.

[0104] In some implementations, the orthographic projection of the first through hole 310 overlaps the orthographic projection of the second through hole 510 on a plane perpendicular to the thickness direction of the first wall 30.

[0105] In this embodiment, on a plane perpendicular to the thickness direction of the first wall 30, the orthographic projection of the first through hole 310 is set to cover the orthographic projection of the second through hole 510, so that a portion of the main body 410 of the connecting structure 40 can smoothly enter the receiving cavity 110 through the second through hole 510 and the first through hole 310 in sequence, so as to facilitate the assembly of the connecting structure 40, thereby improving the assembly performance and usability of the energy storage device 1.

[0106] In some implementations, such as Figure 5 and Figure 6 As shown, the first extension 420 is bolted to the connecting part 50.

[0107] For example, the first extension 420 and the connecting portion 50 can be connected by a bolt member 90.

[0108] In this embodiment, by setting the first extension 420 to be bolted to the connecting part 50, the connecting part 50 and the connecting structure 40 can be installed and disassembled, thereby facilitating the maintenance and replacement of the connecting structure 40, reducing the assembly cost of the energy storage device 1, and improving the assembly performance and performance of the energy storage device 1.

[0109] Figure 7 A schematic diagram of the connection structure 40 provided in one embodiment of this application is shown. Figure 8 A cross-sectional schematic diagram of a connection structure 40 provided in an embodiment of this application is shown. Figure 9 A cross-sectional schematic diagram of a connection structure 40 provided in another embodiment of this application is shown.

[0110] In some implementations, such as Figures 5 to 9 As shown, the main body 410 includes a third through hole 411 extending along the thickness direction of the first wall 30. The third through hole 411 includes a first hole section 412 away from the receiving cavity 110. The first hole section 412 is threadedly connected to an external pipeline.

[0111] It should be understood that the shape of the third through hole 411 in this embodiment can be set according to actual needs. For example, on a plane perpendicular to the thickness direction of the first wall 30, the cross-sectional shape of the third through hole 411 can be set as a circle, square, ellipse or polygon, etc.

[0112] It should also be understood that the first hole section 412 is threadedly connected to the external pipeline, that is, the first hole section 412 of the main body 410 is provided with an internal thread for threaded connection to the external pipeline, which can effectively reduce the risk of corrosion of the connection structure 40 due to contact with external air, and facilitate the maintenance and replacement of the connection structure 40.

[0113] In this embodiment, by configuring the main body 410 to include a third through hole 411 extending along the thickness direction of the first wall 30, and the third through hole 411 including a first hole segment 412 away from the receiving cavity 110, the first hole segment 412 is threadedly connected to the external pipeline. Compared with the prior art technology of external pipeline and external threaded connection of the connecting structure 40, the external pipeline and the first hole segment 412 in this application are threadedly connected, which can effectively reduce the risk of corrosion of the connecting structure 40 due to contact with external air, and facilitate the maintenance and replacement of the connecting structure 40, thereby improving the performance of the energy storage device 1.

[0114] In some implementations, such as Figures 6 to 9 As shown, the third through hole 411 also includes a second hole section 413 near the receiving cavity 110, which is threadedly connected to the nozzle structure 80.

[0115] It should be understood that the second hole section 413 is threadedly connected to the nozzle structure 80, that is, the second hole section 413 of the main body 410 is provided with an internal thread that is threadedly connected to the nozzle structure 80, which can effectively reduce the risk of corrosion of the connection structure 40 due to contact with external air, and facilitate the maintenance and replacement of the connection structure 40.

[0116] In this embodiment, the third through hole 411 is configured to include a second hole segment 413 near the receiving cavity 110. The second hole segment 413 is threadedly connected to the nozzle structure 80, so as to facilitate the installation and disassembly of the connecting structure 40 and the nozzle structure 80. At the same time, compared with the prior art technical solution of external thread connection between the nozzle structure 80 and the connecting structure 40, the risk of corrosion of the connecting structure 40 can be effectively reduced, thereby improving the performance of the energy storage device 1.

[0117] In some implementations, the main body 410 and the first extension 420 are integrally formed by stamping. Thus, in this embodiment, by integrally forming the main body 410 and the first extension 420 by stamping, both the manufacturing cost and structural strength of the connecting structure 40 are considered, thereby improving the performance of the energy storage device 1.

[0118] Figure 10 A cross-sectional schematic diagram of a portion of the structure of an energy storage device 1 provided in another embodiment of this application is shown.

[0119] In some implementations, such as Figure 10 As shown, the energy storage device 1 also includes a sealing structure 60, which is disposed between the connecting portion 50 and the first extension portion 420. The sealing structure 60 includes a fourth through hole 610 extending along the thickness direction of the first wall 30, and the fourth through hole 610 communicates with the second through hole 510.

[0120] It should be understood that the sealing structure 60 in the embodiments of this application is located between the connecting portion 50 and the first extension portion 420. This can mean that the sealing structure 60 can be connected to the surface of the connecting portion 50 away from the receiving cavity 110, or that the sealing structure 60 can be connected to the surface of the first extension portion 420 facing the receiving cavity 110.

[0121] It should also be understood that the shape of the fourth through hole 610 in this embodiment can be set according to actual needs. For example, on a plane perpendicular to the thickness direction of the first wall 30, the cross-sectional shape of the fourth through hole 610 can be set as a circle, square, ellipse, or polygon, etc. It should also be understood that the shape of the fourth through hole 610 can be set according to the shape of the second through hole 510, or the shape of the fourth through hole can be set according to the shape of the connecting structure 40.

[0122] It should also be understood that the material of the sealing structure 60 in the embodiments of this application may be one of the following: nitrile rubber, ethylene propylene diene monomer (EPDM) rubber, fluororubber, silicone rubber, polytetrafluoroethylene (PTFE), etc.

[0123] In this embodiment, the energy storage device 1 is further provided with a sealing structure 60, which is disposed between the connecting portion 50 and the first extension portion 420. The sealing structure 60 includes a fourth through hole 610 extending along the thickness direction of the first wall 30. The fourth through hole 610 communicates with the second through hole 510, so as to improve the sealing performance between the connecting structure 40 and the connecting portion 50, thereby improving the performance of the energy storage device 1.

[0124] In some implementations, the orthographic projection of the fourth through hole 610 overlaps with the orthographic projection of the second through hole 510 on a plane perpendicular to the thickness direction of the first wall 30.

[0125] It should be understood that, on a plane perpendicular to the thickness direction of the first wall 30, the orthographic projection of the fourth through hole 610 and the orthographic projection of the second through hole 510 overlapping each other can mean that the area of ​​the orthographic projection of the fourth through hole 610 and the area of ​​the orthographic projection of the second through hole 510 are exactly the same.

[0126] In this embodiment, on a plane perpendicular to the thickness direction of the first wall 30, the orthographic projection of the fourth through hole 610 is set to overlap with the orthographic projection of the second through hole 510, so as to facilitate the processing and manufacturing of the sealing structure 60, and at the same time, to facilitate the placement of the sealing structure 60 between the connecting part 50 and the first extension part 420, thereby improving the sealing performance between the connecting structure 40 and the connecting part 50, and thus improving the performance of the energy storage device 1.

[0127] Figure 11 A cross-sectional schematic diagram of a portion of the structure of an energy storage device 1 provided in another embodiment of this application is shown.

[0128] In some implementations, such as Figure 11 As shown, when the inlet 440 is not connected to the external pipeline, the energy storage device also includes a cover structure 70, which covers the side of the connecting structure 40 away from the receiving cavity 110. On a plane perpendicular to the thickness direction of the first wall 30, the orthographic projection of the cover structure 70 covers the orthographic projection of the main body 410.

[0129] It should be understood that when the inlet 440 is not connected to the external pipeline, the cover structure 70 covers the side of the connecting structure 40 away from the receiving cavity 110, so as to reduce the risk of external impurities entering the energy storage device 1 through the connecting structure 40 when the connecting structure 40 is not connected to the external pipeline.

[0130] It should also be understood that the shape of the cover plate structure 70 can be set according to actual needs on a plane perpendicular to the thickness direction of the first wall 30. For example, the shape of the cover plate structure 70 can be matched with the shape of the connecting structure 40.

[0131] In this embodiment, when the connecting structure 40 is not connected to the external pipeline, the energy storage device 1 is configured to also include a cover structure 70, which covers the side of the connecting structure 40 away from the receiving cavity 110. On a plane perpendicular to the thickness direction of the first wall 30, the orthographic projection of the cover structure 70 covers the orthographic projection of the main body 410. In this way, when the inlet 440 is not connected to the external pipeline, the cover structure 70 reduces the risk of external impurities entering the energy storage device 1 through the connecting structure 40, thereby improving the performance of the energy storage device 1.

[0132] According to some embodiments of this application, this application also provides an energy storage system including multiple energy storage devices 1 as described in any of the above embodiments. In some embodiments, the energy storage system may include one or more energy storage devices 1, a power conversion device, and a transformer, wherein the power conversion device and the transformer are used to connect between a power generation device and the energy storage device 1. The power generation device is used to generate electrical energy, which can be stored in the energy storage device 1 through the power conversion device. For example, the power conversion device can convert the alternating current generated by the power generation device into direct current for storage in the energy storage device 1; alternatively, the power conversion device can also convert the direct current in the energy storage device 1 into alternating current for use by the power grid or load. The transformer is used to step up the voltage of the electrical energy to meet the requirements of the transmission line. For example, the transformer can be used to step up the low-voltage alternating current output by the power conversion device to the high-voltage current required by the transmission line. As an example, the power generation device 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 device is not limited in this application.

[0133] According to some embodiments of this application, see Figures 1 to 11This application provides an energy storage device 1, which includes a first wall 30, a receiving cavity 110, and a connecting structure 40. The first wall 30 includes a first through hole 310 extending along the thickness direction of the first wall 30. The receiving cavity 110 is used to receive a battery device. The connecting structure 40 is detachably connected to the first wall 30 and communicates with the receiving cavity 110 through the first through hole 310. An inlet 440 is provided at the end of the connecting structure 40 away from the receiving cavity 110, and an outlet 450 is provided at the end of the connecting structure 40 facing the receiving cavity 110. A portion of the connecting structure 40 protrudes through the first through hole 310 from a first surface 320 of the first wall 30 facing the receiving cavity 110. The energy storage device 1 further includes: a connecting portion 50, a second surface 330 disposed on the side of the first wall 30 away from the receiving cavity 110, the connecting portion 50 including a second through hole 510 extending along the thickness direction of the first wall 30, the second through hole 510 communicating with the first through hole 310; wherein, the connecting structure 40 is detachably connected to the first wall 30 through the connecting portion 50. The connecting structure 40 includes a main body portion 410 and a first extension portion 420, the first extension portion 420 being connected to the outer periphery of the main body portion 410, a portion of the main body portion 410 passing sequentially through the second through hole 510 and the first through hole 310, the first extension portion 420 being detachably connected to the connecting portion 50, an inlet 440 being provided at the end of the main body portion 410 away from the receiving cavity 110, and an outlet 450 being provided at the end of the main body portion 410 facing the receiving cavity 110.

[0134] 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 first wall (30) includes a first through hole (310) extending along the thickness direction of the first wall (30); A receiving cavity (110) is used to house the battery device; A connecting structure (40) is detachably connected to the first wall (30). The connecting structure (40) communicates with the receiving cavity (110) through the first through hole (310). An inlet (440) is provided at one end of the connecting structure (40) away from the receiving cavity (110), and an outlet (450) is provided at one end of the connecting structure (40) facing the receiving cavity (110).

2. The energy storage device according to claim 1, characterized in that, A portion of the connecting structure (40) protrudes through the first through hole (310) from the first surface (320) of the first wall (30) facing the receiving cavity (110).

3. The energy storage device according to claim 2, characterized in that, The energy storage device also includes: A connecting portion (50) is provided on a second surface (330) of the first wall (30) on the side away from the receiving cavity (110). The connecting portion (50) includes a second through hole (510) extending along the thickness direction of the first wall (30). The second through hole (510) communicates with the first through hole (310). The connecting structure (40) is detachably connected to the first wall (30) via the connecting part (50).

4. The energy storage device according to claim 3, characterized in that, The connecting structure (40) includes a main body (410) and a first extension (420). The first extension (420) is connected to the outer periphery of the main body (410). A portion of the main body (410) passes through the second through hole (510) and the first through hole (310) in sequence. The first extension (420) is detachably connected to the connecting part (50). The inlet (440) is provided at one end of the main body (410) away from the receiving cavity (110), and the outlet (450) is provided at one end of the main body (410) facing the receiving cavity (110).

5. The energy storage device according to claim 4, characterized in that, The connecting structure (40) further includes a second extension (430), which is connected to the outer periphery of the first extension (420) and extends toward the receiving cavity (110). On a plane perpendicular to the thickness direction of the first wall (30), the orthographic projection of the second extension (430) is located outside the orthographic projection of the connecting part (50).

6. The energy storage device according to claim 4, characterized in that, On a plane perpendicular to the thickness direction of the first wall (30), the orthographic projection of the first through hole (310) overlaps the orthographic projection of the second through hole (510).

7. The energy storage device according to claim 4, characterized in that, The main body (410) includes a third through hole (411) extending through the thickness direction of the first wall (30), the third through hole (411) including a first hole section (412) away from the receiving cavity (110), the first hole section (412) being threadedly connected to an external pipeline.

8. The energy storage device according to claim 7, characterized in that, The third through hole (411) also includes a second hole section (413) near the receiving cavity (110), the second hole section (413) being threadedly connected to the nozzle structure (80).

9. The energy storage device according to claim 4, characterized in that, The main body (410) and the first extension (420) are integrally formed by stamping.

10. The energy storage device according to claim 4, characterized in that, The energy storage device further includes a sealing structure (60), which is disposed between the connecting part (50) and the first extension part (420). The sealing structure (60) includes a fourth through hole (610) extending along the thickness direction of the first wall (30), and the fourth through hole (610) communicates with the second through hole (510).

11. The energy storage device according to claim 10, characterized in that, On a plane perpendicular to the thickness direction of the first wall (30), the orthographic projection of the fourth through hole (610) overlaps with the orthographic projection of the second through hole (510).

12. The energy storage device according to any one of claims 4 to 11, characterized in that, When the inlet (440) is not connected to an external pipeline, the energy storage device also includes a cover structure (70) that covers the side of the connecting structure (40) away from the receiving cavity (110). On a plane perpendicular to the thickness direction of the first wall (30), the orthographic projection of the cover structure (70) covers the orthographic projection of the main body (410).

13. An energy storage system, characterized in that, include: Multiple energy storage devices according to any one of claims 1 to 12.

Images