Energy storage device and assembly method thereof, energy storage system and charging network

Abstract

The invention is suitable for the technical field of energy storage, and provides an energy storage device, an assembly method thereof, an energy storage system and a charging network. The energy storage device comprises a cabinet body; two adjacent battery devices are arranged at an interval in the first direction and form an interval space; the spraying device is at least partially accommodated in the interval space; the bearing structure is contained in the cabinet body, and the spraying device is connected to the bearing structure; in the energy storage device provided by the embodiment of the invention, at least part of the spraying device can extend to a position between two adjacent battery devices, so that the spraying device can perform targeted spraying on a single battery device; the spraying device is arranged on the bearing structure, and the battery device does not need to provide an installation foundation for the spraying device, so that the possible negative influence of the arrangement of the spraying device on the battery device is reduced, and the installation of the spraying device is also facilitated.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy storage device and its assembly method, an energy storage system, and a charging network. Background Technology

[0002] In current energy storage devices, fire sprinkler pipes are usually installed above each cluster of battery devices. In the event of thermal runaway of a battery device located in the middle of the cluster rather than at the top, the fire-fighting medium sprayed by the sprinkler pipes cannot be directly sprayed onto the corresponding battery device, resulting in poor fire-fighting effect and difficulty in targeted fire control of individual battery devices, as well as poor control effect on the spread of thermal runaway. Summary of the Invention

[0003] In view of the above problems, this application provides an energy storage device and its assembly method, energy storage system and charging network, which can improve the problem of difficulty in fire sprinkler system for individual battery devices in current energy storage devices.

[0004] In a first aspect, embodiments of this application provide an energy storage device, comprising: A cabinet; battery units stacked within the cabinet along a first direction, with adjacent battery units spaced apart in the first direction to form a gap; a spray device at least partially housed within the gap; a support structure housed within the cabinet, the support structure comprising a first part and a second part connected to the first part, the first part supporting the battery units and the second part supporting the spray device; in the first direction, the battery units are spaced apart from the corresponding second parts of the support structure, and at least a portion of the spray device is located between the battery units and the corresponding second parts of the support structure.

[0005] In this embodiment, at least a portion of the spray device can extend between two adjacent battery devices, enabling the spray device to perform targeted spraying on individual battery devices. In the event of thermal runaway of a battery device, the spray device can more promptly and effectively spray the thermally runaway battery device, thereby facilitating better control of the thermal runaway and its propagation. By mounting the spray device on the supporting structure, the battery devices do not need to provide a mounting foundation for the spray device, reducing the potential negative impact of the spray device on the battery devices and facilitating its installation.

[0006] The technical solution of this embodiment also provides some specific structures for the support structure, such that the first part of the support structure supports the battery device and the second part of the support structure supports the spray device, so that the support structure can simultaneously support the battery device and the spray device, thereby improving the utilization rate of the support structure and reducing the space occupied by the support structure of the battery device and the spray device, thus improving space utilization. The battery device and the corresponding second part of the support structure are spaced apart to form an installation space between the battery device and the second part. Under this arrangement, the spray device can be installed after the battery device is installed in the first part of the support structure. At this time, the spray device can be inserted into the gap between the battery device and the second part. After the spray device is installed in place, the spray device can be supported by the second part and located between two adjacent battery devices.

[0007] In some embodiments, in a first direction, the spraying device is spaced apart from the adjacent battery device.

[0008] In the technical solution of this embodiment, the spraying device is set apart from the adjacent battery device to reduce the negative impact that the setting of the spraying device may have on the installation of the battery device, and also to reduce the risk of the spraying device and the battery device colliding with each other during the installation process.

[0009] In some embodiments, the energy storage device further includes a support frame disposed within the cabinet, the support frame being used to provide support for the battery devices, the battery devices being stacked on the support frame; a support structure is connected to the support frame.

[0010] In the technical solution of this embodiment, a bracket is provided to support the battery device; the supporting structure is connected to the bracket so that the bracket can support both the battery device and the spraying device, thereby improving the utilization rate of the bracket.

[0011] In some embodiments, the supporting structure is connected to the cabinet.

[0012] In the technical solution of this embodiment, the supporting structure is connected to the cabinet so that the cabinet provides a fixed foundation for the supporting structure, which can further reduce the risk of mutual interference between the spray device and the battery device during installation.

[0013] In some embodiments, the second part has a slot on the side facing the corresponding battery device, and the spray device is engaged in the slot.

[0014] In the technical solution of this embodiment, a slot is provided on the second part to fix the spraying device. The slot facilitates the installation and disassembly of the spraying device. When the battery device is installed on the bracket first, the spraying device can be inserted into the gap between two adjacent battery devices and locked in the slot, so that the installation of the spraying device can be carried out after the battery device is installed and the spraying device can be fixed.

[0015] In some embodiments, the number of support structures is at least two, and the at least two support structures are arranged at intervals along a second direction, with the interval space formed between two adjacent support structures, and the second direction is perpendicular to the first direction; in the second direction, the two sides of the battery device are respectively connected to the two support structures, and the spray device is located between the two support structures.

[0016] In the technical solution of this embodiment, the supporting structure consists of at least two structures spaced apart to form an interval space and provide installation space for the spraying device.

[0017] In some embodiments, the spraying device includes a pipe for the flow of spraying medium, and a through hole for the spraying medium to be discharged outside the pipe; the battery device includes a battery cell, and a pressure relief mechanism is provided on one side of the battery cell along a first direction; in the first direction, the through hole corresponds to the pressure relief mechanism.

[0018] The technical solution of this embodiment provides some specific structures of the spraying device. Through holes are provided on the pipes of the spraying device, and the through holes correspond to the pressure relief mechanism of the battery cell. In the event of thermal runaway of a battery cell in the battery device, this setting allows the spraying medium to directly correspond to the pressure relief mechanism and spray onto the pressure relief mechanism, so as to spray the thermally runaway battery cell more specifically and to better suppress the spread of thermal runaway.

[0019] In some embodiments, the battery device includes a housing having a first wall located between a respective battery cell and a spray device. The first wall includes a main body and a weak portion connected to the main body, the weak portion being used to release pressure within the housing. In a first direction, the weak portion corresponds to a pressure relief mechanism and to a through hole.

[0020] In this embodiment, a weak part is provided on the first wall of the housing, and the weak part corresponds to the pressure relief mechanism of the battery cell. In the event of thermal runaway of the battery cell, the high-temperature and high-pressure flue gas ejected by the pressure relief mechanism can melt the weak part, so that the through hole of the pipe can be directly opposite the pressure relief mechanism, thereby allowing the spraying medium to be directly sprayed on the corresponding pressure relief mechanism, which can better suppress the thermal runaway of the battery cell and better suppress the spread of thermal runaway.

[0021] In some embodiments, in the first direction, the size of the weak portion is smaller than the size of the main portion.

[0022] The technical solution of this embodiment provides specific structures for some weak parts, making the thickness of the weak parts smaller than the thickness of the main body, so that the weak parts are more likely to break in the event of thermal runaway of the battery cell, so that the spray medium can be directly sprayed onto the corresponding pressure relief mechanism through the broken weak parts, thereby enabling the spraying device to better suppress the thermal runaway of the battery cell and the spread of thermal runaway.

[0023] In some embodiments, a groove is provided on the side of the first wall facing the battery cell to form a weak portion on the first wall.

[0024] In the technical solution of this embodiment, a groove is provided on the side of the first wall facing the battery cell to form a weak part. This arrangement can make the thickness of the weak part smaller than the thickness of the main body, and can also reduce the negative impact of the weak part on the surface of the first wall facing away from the battery device.

[0025] In some embodiments, the spraying device further includes a beam connected to the pipe fitting and also connected to the supporting structure.

[0026] The technical solution of this embodiment provides some specific structures of the spraying device, which includes a beam to support the pipes and connects the beam to the supporting structure to fix the pipes between two adjacent battery cells.

[0027] In some embodiments, the spraying device includes a spraying assembly and a spraying circuit in communication with the spraying assembly, wherein at least a portion of the spraying assembly is located within a space and the spraying circuit is located outside the space.

[0028] The technical solution of this embodiment provides a specific structure of a spraying device, which includes a spraying circuit and a spraying component, and the spraying component is located in an interval space so as to spray the spraying medium to the corresponding battery device through the spraying component; at the same time, a spraying circuit is provided so as to provide the spraying medium to the spraying component through the spraying circuit.

[0029] In some embodiments, the spray assembly includes a first connector, the spray circuit includes a second connector, and the first connector is detachably connected to the second connector.

[0030] In the technical solution of this embodiment, a first connector and a second connector are respectively provided on the spray assembly and the spray circuit, so that the spray circuit can provide spray medium to the spray assembly through the first connector and the second connector; the detachable connection of the first connector and the second connector facilitates the installation, disassembly and maintenance of the spray assembly.

[0031] Secondly, embodiments of this application also provide an assembly method for an energy storage device, applied to some embodiments of the first aspect of the energy storage device, the assembly method comprising: Battery devices are stacked and installed in a manner in which adjacent battery devices are spaced apart to form a gap; a spray device is inserted into the gap, wherein the spray device is connected to a supporting structure.

[0032] In this embodiment, the battery devices are first stacked and installed with gaps between adjacent battery devices to provide tolerance space during installation and reduce the risk of collision with other battery devices. After the battery devices are installed, a spraying device is inserted into the gap space so that the spraying device can spray a single battery device. At the same time, the gap space reserved for the installation of the battery devices is fully utilized, improving space utilization.

[0033] In some embodiments, the supporting structure includes a first part and a second part connected to the first part; the step of stacking and mounting the battery device includes pressing the battery device against the first part; the step of inserting the spray device into the gap space includes pressing the spray device against the second part.

[0034] In the technical solution of this embodiment, the battery device and the spraying device are supported by a support structure, so as to improve the utilization rate of the support structure and reduce the space occupation of the support structure of the battery device and the spraying device.

[0035] In some embodiments, the spraying device includes a spraying assembly and a spraying circuit in communication with the spraying assembly, at least a portion of the spraying assembly being located within the interval space and the spraying circuit being located outside the interval space; the step of inserting the spraying device into the interval space includes: inserting the spraying assembly into the interval space.

[0036] In this embodiment, the spraying device includes a spraying component and a spraying circuit, and the spraying component is located in the space between the spraying components to spray the corresponding battery device. At the same time, the spraying circuit provides a spraying medium to the spraying component so that the spraying component can spray the corresponding battery device and suppress the thermal runaway of the corresponding battery device.

[0037] In some embodiments, the spray assembly includes a first connector, the spray circuit includes a second connector, and the first connector is detachably connected to the second connector; after inserting the spray device into the interval space, the assembly method further includes: installing the first connector onto the second connector.

[0038] In the technical solution of this embodiment, a first connector and a second connector are provided, and after the spray assembly is inserted into the gap space, the first connector is installed on the second connector so that the spray assembly can be connected to the spray circuit, thereby facilitating the spray circuit to provide spray medium to the spray assembly.

[0039] Thirdly, embodiments of this application also provide an energy storage system, including an energy storage device formed by an assembly method of an energy storage device provided in some embodiments of the first aspect or an energy storage device provided in some embodiments of the second aspect; and an energy conversion device connected to the energy storage device to convert the current input to the energy storage device or output from the energy storage device into energy.

[0040] Fourthly, embodiments of this application also provide a charging network, including an energy storage device provided in some embodiments of the first aspect, or an energy storage device formed by an assembly method of an energy storage device provided in some embodiments of the second aspect, or an energy storage system provided in some embodiments of the third aspect; and a charging device, wherein the energy storage device is used to provide electrical energy to the charging device.

[0041] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0042] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application; Figure 2 This is an exploded view of the battery device provided in some embodiments of this application; Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application; Figure 4 A perspective view of the battery device and bracket provided in some embodiments of this application; Figure 5 This is a front view schematic diagram of a battery device and a bracket provided in some embodiments of this application; Figure 6 for Figure 5 A magnified view of a portion of point A in the middle; Figure 7 A perspective view of a bracket with a battery device removed from it, provided for some embodiments of this application; Figure 8 for Figure 7 A magnified view of a portion of point B in the middle; Figure 9 for Figure 5A magnified view of a portion of point C in the middle; Figure 10 This is a schematic diagram of the structure of a spraying device provided in some embodiments of this application; Figure 11 A bottom view of the first wall of a battery device provided in some embodiments of this application; Figure 12 This is a front view schematic diagram of a battery device provided in some embodiments of this application; Figure 13 for Figure 12 Cross-sectional view at the DD line; Figure 14 for Figure 13 A magnified view of a portion of point E in the middle; Figure 15 A schematic flowchart illustrating the assembly method of an energy storage device provided in some embodiments of this application; Figure 16 Schematic diagram of an energy storage system provided for some embodiments of this application; Figure 17 This is a schematic diagram of a charging network provided in some embodiments of this application.

[0043] The markings in the diagram mean: 1000. Energy storage devices; 100. Cabinet; 10. Partition space; 200. Battery assembly; 20. Housing; 21. First wall; 211. Main body; 212. Weak part; 213. Groove; 30. Battery cell; 31. Housing; 32. End cap; 33. Electrode assembly; 34. Electrode terminal; 35. Pressure relief mechanism; 300. Sprinkler device; 40. Sprinkler assembly; 41. Pipe fitting; 411. Through hole; 42. Beam; 43. First joint; 50. Sprinkler circuit; 51. Second joint; 400. Bracket; 60. Supporting structure; 61. First part; 62. Second part; 621. Slot; 2000, Power conversion device; 3000, power generation equipment; 4000, charging piles; 5000, Connector. Detailed Implementation

[0044] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0046] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0047] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0048] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0049] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0053] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0054] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0055] An energy storage device is an integrated battery unit and control cabinet. The control cabinet and battery unit are coupled together to manage the battery unit and utilize the conversion between electrical energy and chemical energy to store and output electrical energy. The battery unit can serve as a backup power source, perform peak shaving and valley filling when the power system supply is uneven, regulate frequency when the power system load or power generation is high, or be applied in photovoltaic-storage power generation systems.

[0056] In order to control thermal runaway of the battery device and prevent its spread, energy storage devices are usually equipped with spraying devices. The spraying devices can spray a spraying medium onto the battery device to control thermal runaway and its spread.

[0057] In current energy storage devices, multiple battery devices are typically stacked to form a battery cluster, and the spray device is usually placed on top of the battery cluster. This means that the spray device can only spray directly onto the battery devices in the battery cluster that are close to the spray device, while other battery devices in the same battery cluster are difficult to be sprayed directly. In other words, in current energy storage devices, the spray device is difficult to spray a single battery device, and the effect of suppressing thermal runaway of other battery devices in the battery cluster that are not close to the spray device is poor, as is the effect of suppressing the spread of thermal runaway.

[0058] Based on the above considerations, in order to improve the problem of difficulty in applying fire sprinklers to individual battery devices in current energy storage devices, this application provides an energy storage device in which at least a portion of the sprinkler device is located in the space between two adjacent battery devices; at the same time, a support structure is provided to support the sprinkler device. In such a battery device, at least a portion of the sprinkler device can extend between two adjacent battery devices, so that the sprinkler device can provide targeted spraying to individual battery devices; in the event of thermal runaway of a battery device, the sprinkler device can provide targeted spraying to the thermally runaway battery device more promptly, thereby facilitating better control of the thermal runaway of the battery device, and also better controlling the spread of the thermal runaway of the battery device; by placing the sprinkler device on the support structure, the battery device does not need to provide an installation foundation for the sprinkler device, reducing the potential negative impact of the sprinkler device on the battery device, and also facilitating the installation of the sprinkler device.

[0059] The energy storage device disclosed in this application can be used in the industrial field, such as for balancing loads and reducing peak-valley differences; it can also be used in commercial complexes to achieve peak shaving and valley filling and intelligent management of electricity, etc.

[0060] For ease of explanation, the following embodiments will be described using a containerized energy storage device 1000 as an example of an embodiment of this application.

[0061] refer to Figure 1 , Figure 2 The diagram below illustrates the structure of an energy storage device 1000 according to some embodiments of this application. The energy storage device 1000 includes one or more battery clusters to increase the voltage and capacity of the energy storage device 1000. Each battery cluster may include multiple battery devices 200, which are connected in series via a busbar to increase the voltage of the energy storage device 1000. When the energy storage device 1000 includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device 1000.

[0062] The energy storage device 1000 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 1000 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 1000 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the energy storage device 1000.

[0063] In some embodiments, the energy storage device 1000 is an energy storage container or an energy storage cabinet.

[0064] In some embodiments, the energy storage device 1000 may include a cabinet 100 and one or more battery clusters, the battery clusters being housed in the cabinet 100.

[0065] In some embodiments, the energy storage device 1000 may include devices such as a thermal management device, a main control device, a central control device, a power distribution device, and a fire protection device.

[0066] As an example, the thermal management device may include a liquid cooling unit that supplies coolant to each battery device 200 via piping for regulating the temperature of the individual battery cells 30.

[0067] As an example, the master control unit can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The master control unit 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 master control unit includes a slave battery management unit (SBMU), a fusion switch, and other devices.

[0068] As an example, the central control unit can serve as the battery management unit of the energy storage device 1000, used to monitor and manage the energy storage device 1000. The central control unit can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device 1000. For example, it can control the charging and discharging current and voltage of the energy storage device 1000. As an example, the central control unit includes devices such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) converter, and a fiber optic converter.

[0069] As an example, fire protection devices include control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0070] As an example, the power distribution device can be used to distribute power to devices in the energy storage device 1000 that require electricity.

[0071] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 200 provided in some embodiments of this application. The battery device 200 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 30, which are connected in series, parallel, or mixed connection via a busbar.

[0072] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 30.

[0073] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 30 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 30 together with cable ties.

[0074] In some embodiments, the battery device 200 may be a battery pack, which includes a housing 20 and one or more battery cell assemblies housed in the housing 20.

[0075] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 20 by fixing the battery module in the housing 20.

[0076] As an example, the battery cell assembly can also be housed in the housing 20 by directly fixing multiple battery cells 30 to the housing 20.

[0077] As an example, the housing 20 may include a first housing 20 and a second housing 20. The first housing 20 and the second housing 20 are fastened together to form a closed space inside the housing 20 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 20 may be a top cover or a bottom plate.

[0078] As an example, the housing 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 20 forms an enclosed space to accommodate the battery cell assembly.

[0079] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0080] refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 30 provided in some embodiments of this application. A battery cell 30 refers to the smallest unit that makes up a battery. As shown, the battery cell 30 includes an end cap 32, a housing 31, an electrode assembly 33, and other functional components.

[0081] End cap 32 refers to a component that covers the opening of housing 31 to isolate the internal environment of battery cell 30 from the external environment. The shape of end cap 32 can be adapted to the shape of housing 31 to fit it. Optionally, end cap 32 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 32 is less prone to deformation under pressure and impact, enabling battery cell 30 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 34 can be provided on end cap 32. Electrode terminals 34 can be used for electrical connection with electrode assembly 33 for outputting or inputting electrical energy into battery cell 30. In some embodiments, end cap 32 can also be provided with a pressure relief mechanism 35 for releasing internal pressure when the internal pressure or temperature of battery cell 30 reaches a threshold. The material of end cap 32 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 32. The insulating element can be used to isolate the electrical connection components within the housing 31 from the end cap 32 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0082] The housing 31 is a component used to cooperate with the end cap 32 to form the internal environment of the battery cell 30. This internal environment can accommodate the electrode assembly 33, electrolyte, and other components. The housing 31 and the end cap 32 can be independent components. An opening can be provided on the housing 31, and the end cap 32 closes the opening to form the internal environment of the battery cell 30. Alternatively, the end cap 32 and the housing 31 can be integrated. Specifically, the end cap 32 and the housing 31 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 31, the end cap 32 closes the housing 31. The housing 31 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 31 can be determined according to the specific shape and size of the electrode assembly 33. The material of the housing 31 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0083] Electrode assembly 33 is the component in the battery cell 30 where the electrochemical reaction occurs. The housing 31 may contain one or more electrode assemblies 33. The electrode assembly 33 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body 211 of the electrode assembly 33, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body 211 or separately at both ends of the main body 211. During the charging and discharging process of the battery, active ions (e.g., lithium ions) reversibly insert and extract between the positive and negative electrode sheets to achieve charging and discharging. The tabs connect to the electrode terminals 34 to form a current loop.

[0084] Firstly, reference Figures 4 to 6 This application provides an energy storage device 1000, including a cabinet 100, a battery device 200, a spray device 300, and a supporting structure 60. The battery devices 200 are stacked within the cabinet 100 along a first direction, with adjacent battery devices 200 spaced apart in the first direction to form a gap space 10. The spray device 300 is at least partially housed within the gap space 10. The supporting structure 60 is housed within the cabinet 100, and the spray device 300 is connected to the supporting structure 60, which provides support for the spray device 300.

[0085] Cabinet 100 refers to the structure in energy storage device 1000 used to provide an installation base for battery device 200 and other structures. Cabinet 100 can be used to house battery device 200 and other structures (such as thermal management device, main control device, etc.). Cabinet 100 may include a container or other structures. The shape of cabinet 100 may be prismatic, cylindrical or other shapes.

[0086] Battery device 200 refers to the device in energy storage device 1000 used for storing and releasing electrical energy. The number of battery devices 200 can be one, two or more. Battery device 200 can include one or more battery cells 30. Multiple battery cells 30 can be connected in series, parallel or mixed. Mixed connection means that multiple battery cells 30 are connected in both series and parallel. Multiple battery cells 30 can be directly connected in series, parallel or mixed together and then the whole formed by multiple battery cells 30 is housed in the housing 20. Battery device 200 can also be formed by first connecting multiple battery cells 30 in series, parallel or mixed to form battery device 200, and then connecting multiple battery devices 200 in series, parallel or mixed to form a whole.

[0087] The battery device 200 may also include other structures, such as a busbar for electrical connection between multiple battery cells 30.

[0088] Each battery cell 30 can be a rechargeable battery; it can also be a lithium-sulfur battery cell 30, a sodium-ion battery cell 30, or a magnesium-ion battery cell 30, but is not limited to these. The battery cell 30 can be cylindrical, flat, cuboid, or other shapes.

[0089] Battery devices 200 are spaced apart within the cabinet 100 along a first direction. The battery devices 200 are directly connected to the cabinet 100, or they can be placed within the cabinet 100 through a bracket 400 or other intermediate structure, and the battery devices 200 are spaced apart along the first direction through the intermediate structure.

[0090] For example, multiple battery devices 200 spaced apart along a first direction can form a battery cluster, and the energy storage device 1000 may include only one battery cluster or two or more battery clusters.

[0091] In the first direction, a space 10 is formed between two adjacent battery devices 200. The space 10 is a spatial structure formed by the battery devices 200 spaced apart. The space 10 may be defined by only two adjacent battery devices 200. The space 10 may also include other structures. The space 10 may be a prism-shaped spatial structure, a cylindrical spatial structure, or a spatial structure of other shapes.

[0092] The first direction can be the height direction of the energy storage device 1000, or the length direction or width direction of the energy storage device 1000; for example, the first direction is the height direction of the energy storage device 1000.

[0093] The sprinkler device 300 refers to the device in the energy storage device 1000 used to spray a spraying medium onto the battery device 200. The sprinkler device 300 may include a nozzle, a spray pipe or other structure. The spraying medium refers to a medium that can be sprayed onto the battery device 200 in the event of thermal runaway and can suppress thermal runaway and heat propagation. The state of the spraying medium can be liquid, gas, solid or gas-liquid mixture. The spraying medium may include water, aerosol or other fire-fighting media.

[0094] At least a portion of the spraying device 300 is housed in the space 10. The spraying device 300 may be partially housed in the space 10 or the entire spraying device 300 may be housed in the space 10. If there are multiple space 10s, different portions of the spraying device 300 may be housed in different space 10s.

[0095] At least a portion of the spray device 300 is located in the space 10. In the event of thermal runaway of the battery device 200, the spray device 300 in the space 10 adjacent to the battery device 200 can spray a spray medium onto the thermally runaway battery device 200 to suppress thermal runaway of the battery device 200 and suppress the spread of thermal runaway.

[0096] For example, the first direction is the height direction of the energy storage device 1000, and multiple battery devices 200 are arranged at intervals along the first direction, with a gap space 10 formed between each adjacent battery device 200. Different parts of the spray device 300 are located in each gap space 10. At this time, a part of the spray device 300 can also be located above the uppermost battery device 200.

[0097] For example, the first direction is the height direction of the energy storage device 1000, and multiple battery devices 200 are arranged at intervals along the first direction, with a gap space 10 formed between each adjacent battery device 200. Different parts of the spray device 300 are located in each gap space 10. In the event of thermal runaway of a battery device 200, some of the spray devices 300 in the gap space 10 above the battery device 200 can spray spray medium onto the thermally runaway battery device 200.

[0098] With at least a portion of the spray device 300 housed in the spacer 10, the spray device 300 can spray a single battery device 200; in the event of thermal runaway of a battery device 200, the spray device 300 can spray the thermally runaway battery device 200, thereby more specifically suppressing the thermal runaway of the battery device 200 and better suppressing the spread of the thermal runaway.

[0099] The supporting structure 60 refers to the structure in the energy storage device 1000 used to provide an installation foundation for the spray device 300. The supporting structure 60 may include a plate structure, a frame structure, or other shapes. The supporting structure 60 may be an independent structure and located inside the cabinet 100, or it may be part of the cabinet 100 and connected to it. The number of supporting structures 60 may be one, two, or more. The material of the supporting structure 60 may include metal, plastic, or other materials.

[0100] The spray device 300 is connected to the supporting structure 60. The spray device 300 can be connected to the supporting structure 60 by screws, snaps or other means. The spray device 300 can also be placed on the supporting structure 60 alone. When the spray device 300 is connected to the supporting structure 60, the battery device 200 can be fixed in the cabinet 100 by other structures. The battery device 200 can also be connected to the supporting structure 60.

[0101] When there are multiple battery devices 200, different parts of the spray device 300 can be located in the interval space 10 between every two adjacent battery devices 200. At this time, there can be multiple supporting devices, and multiple supporting devices can correspond to different interval spaces 10 to support a part of the spray device 300 in each interval space 10.

[0102] Because the spray device 300 is supported by the support structure 60, the spray device 300 does not need to be connected to the adjacent battery device 200. During the assembly process of the battery device 200 and the spray device 300, the battery device 200 and the spray device 300 can be assembled separately without interfering with each other.

[0103] For example, there is a space 10 between the battery devices 200 stacked along the first direction. During the assembly of the battery devices 200, the space 10 serves as an assembly tolerance space to facilitate the assembly of each battery device 200 and reduce the risk of collision between adjacent battery devices 200 during assembly. After the battery devices 200 are assembled, the space 10 no longer serves to provide assembly tolerance. At this time, at least a part of the spraying device 300 can be placed in the space 10 so that the spraying device 300 can spray each battery device 200 and make full use of the space 10, thereby improving the space utilization rate within the cabinet 100.

[0104] In this embodiment, at least a portion of the spray device 300 can extend between two adjacent battery devices 200, enabling the spray device 300 to perform targeted spraying on a single battery device 200. In the event of thermal runaway of a battery device 200, the spray device 300 can more promptly and specifically spray the thermally runaway battery device 200, thereby facilitating better control of the thermal runaway of the battery device 200 and better controlling the spread of the thermal runaway. By mounting the spray device 300 on the support structure 60, the battery device 200 does not need to provide an installation foundation for the spray device 300, reducing the potential negative impact of the spray device 300 on the battery device 200 and facilitating the installation of the spray device 300.

[0105] refer to Figures 5 to 8 In some embodiments, the support structure 60 is also used to support the battery device 200; the support structure 60 includes a first part 61 and a second part 62 connected to the first part 61, the battery device 200 is pressed against the first part 61 and the spray device 300 is pressed against the second part 62.

[0106] The support structure 60 is also used to support the battery device 200. That is, the support structure 60 can support both the spray device 300 and the battery device 200. At this time, the battery device 200 and the spray device 300 can be located in different parts of the support structure 60.

[0107] The first part 61 refers to the part of the supporting structure 60 used to support the battery device 200. The first part 61 can be a square plate structure, a prism structure, or a structure of other shapes. The material of the first part 61 can include metal, plastic, or other materials.

[0108] The second part 62 refers to the portion of the supporting structure 60 used to support the spray device 300. The second part 62 can be a square plate structure, a cold column structure, or other shapes. The second part 62 is connected to the first part 61. The second part 62 can be connected to the first part 61 by welding, bonding, screwing, or other means. The second part 62 can also be integrally formed with the first part 61. The material of the second part 62 can include metal, plastic, or other materials. The material of the second part 62 can be the same as or different from that of the first part 61.

[0109] For example, when the supporting structure 60 is connected to the bracket 400, the first part 61 can be connected to the bracket 400 by welding, bonding, screwing, snapping or other means; at this time, the second part 62 is connected to the side of the first part 61 away from the bracket 400.

[0110] For example, when the supporting structure 60 is connected to the cabinet 100, both the first part 61 and the second part 62 can be connected to the cabinet 100. In this case, the first part 61 and the second part 62 can be connected to the cabinet 100 by welding, bonding, screwing, snapping or other means.

[0111] For example, the first part 61 and the second part 62 are integrally formed. The first part 61 and the second part 62 are different parts of the support structure 60 according to their functions. That is, the part of the support structure 60 that supports the battery device 200 is the first part 61, and the part of the support structure 60 that supports the spray device 300 is the second part 62.

[0112] This embodiment provides specific structures for the support structure 60, such that the first part 61 of the support structure 60 supports the battery device 200, and the second part 62 of the support structure 60 supports the spray device 300. This allows the support structure 60 to simultaneously support both the battery device 200 and the spray device 300, thereby improving the utilization rate of the support structure 60 and reducing the space occupied by the support structures of the battery device 200 and the spray device 300, thus improving space utilization.

[0113] refer to Figure 5 , Figure 6 In some embodiments, in the first direction, the battery device 200 is spaced apart from the second part 62 of the corresponding support structure 60.

[0114] The battery device 200 and the second part 62 of the corresponding support structure 60 are spaced apart. The support structure 60 corresponding to the battery device 200 is the support structure 60 that supports the battery device 200, that is, the support structure 60 that the battery device 200 presses against.

[0115] When the battery device 200 is pressed against the first part 61 of the corresponding support structure 60, the battery device 200 and the second part 62 of the corresponding support structure 60 are spaced apart in the first direction, that is, there is a gap between the battery device 200 and the second part 62 of the corresponding support structure 60 in the first direction.

[0116] For example, if there is a gap between the battery device 200 and the second part 62 of the corresponding support structure 60 in the first direction, a support leg, slide rail or other structure can be provided on the side of the battery device 200 facing the corresponding support structure 60, and the support leg, slide rail or other structure can be pressed against the first part 61, thereby creating a gap between the battery device 200 and the second part 62 in the first direction.

[0117] For example, if there is a gap between the battery device 200 and the second part 62 of the corresponding support structure 60 in the first direction, the second part 62 can be deformed in a direction away from the corresponding battery device 200, thereby creating a gap between the battery device 200 and the second part 62 in the first direction.

[0118] The gap between the battery device 200 and the second part 62 is used for the insertion of the spray device 300 so that the spray device 300 can enter the space 10. When there is a gap between the battery device 200 and the second part 62, during the assembly process of the battery device 200 and the spray device 300, each battery device 200 can be placed on a different support structure 60 first, and then different parts of the spray device 300 can be inserted into the space 10 between each two adjacent battery devices 200, so that the part of the spray device 300 connected to the second part 62 enters the gap between the battery device 200 and the corresponding second part 62, thereby realizing the installation of the spray device 300.

[0119] The gap between the battery device 200 and the second part 62 is used for the insertion of the spray device 300. This arrangement reduces the installation space required for the spray device 300 and allows the spray device 300 to utilize the reserved tolerance space between adjacent battery devices 200 without the need for additional installation space. At the same time, this arrangement also reduces the space occupied by the spray device 300 and reduces the negative impact of the installation of the spray device 300 on the local area of ​​the battery device 200.

[0120] In this embodiment, the battery device 200 and the second part 62 of the corresponding support structure 60 are spaced apart to form an installation space between the battery device 200 and the second part 62. Under this arrangement, the spray device 300 can be installed after the battery device 200 is installed on the first part 61 of the support structure 60. At this time, the spray device 300 can be inserted into the gap between the battery device 200 and the second part 62. After the spray device 300 is installed in place, it can be supported by the second part 62 and located between two adjacent battery devices 200.

[0121] refer to Figures 4 to 6 In some embodiments, the spray device 300 is spaced apart from the adjacent battery device 200 in the first direction.

[0122] The spray device 300 is spaced apart from the adjacent battery device 200 in the first direction. That is, there is a gap between the part of the spray device 300 located in the space 10 and the battery devices 200 on both sides of the first direction. In other words, the spray device 300 does not directly contact the adjacent battery device 200.

[0123] This arrangement facilitates the installation of the spray device 300 and the battery device 200, and reduces the risk of the spray device 300 and the battery device 200 colliding with each other during installation.

[0124] In this configuration, the spray device 300 and the battery device 200 are not directly connected. The battery device 200 does not need to be equipped with an installation structure to cooperate with the spray device 300. In other words, the battery device 200 does not need to be improved simultaneously for the installation of the spray device 300, which reduces design and manufacturing costs.

[0125] In this embodiment, the spray device 300 is spaced apart from the adjacent battery device 200 to reduce the potential negative impact of the spray device 300 on the installation of the battery device 200, and also to reduce the risk of the spray device 300 and the battery device 200 colliding with each other during installation.

[0126] refer to Figures 4 to 8In some embodiments, the energy storage device 1000 further includes a bracket 400 disposed within the cabinet 100, the bracket 400 being used to provide support for the battery device 200, the battery device 200 being stacked on the bracket 400; and a support structure 60 being connected to the bracket 400.

[0127] The bracket 400 refers to the support structure in the energy storage device 1000 used to provide support for the battery device 200. The bracket 400 may include a frame structure, or a column structure, a plate structure, or other shapes. The bracket 400 is located inside the cabinet 100. The bracket 400 may be directly connected to the cabinet 100 or indirectly connected to the cabinet 100 through an intermediate structure. The material of the bracket 400 may include metal, plastic, or other materials.

[0128] When multiple battery devices 200 are stacked at intervals along the first direction, each battery device 200 can be mounted on the same bracket 400, and the bracket 400 can have multiple layers; the battery devices 200 can be connected to the bracket 400 by screwing, snapping or other means.

[0129] The support structure 60 is connected to the bracket 400. The support structure 60 can be connected to the bracket 400 by screwing, snapping, welding or other means. The support structure 60 can also be integrally formed with the bracket 400. When the spray device 300 is located between adjacent battery devices 200, at least a portion of the support structure 60 can extend into the space 10 between the two adjacent battery devices 200 to provide support for the spray device 300. The support structure 60 can also be located outside the space 10, in which case a portion of the spray device 300 extends into the space 10 and is connected to the support structure 60.

[0130] By connecting the support structure 60 to the bracket 400, during the assembly process of the energy storage device 1000, simply installing the bracket 400 inside the cabinet 100 can simultaneously provide an installation foundation for both the battery device 200 and the spray device 300, simplifying the assembly process. The bracket 400 can provide support for both the battery device 200 and the spray device 300 through the support structure 60, thereby improving the utilization rate of the bracket 400.

[0131] In this embodiment, a bracket 400 is provided to support the battery device 200; the support structure 60 is connected to the bracket 400 so that the bracket 400 can support both the battery device 200 and the spray device 300, thereby improving the utilization rate of the bracket 400.

[0132] In some embodiments, the support structure 60 is connected to the cabinet 100.

[0133] The supporting structure 60 is connected to the cabinet 100. The supporting structure 60 can be connected to the cabinet 100 by screwing, snapping, welding, bonding or other means; the supporting structure 60 can also be integrally formed with the corresponding part of the cabinet 100.

[0134] The supporting structure 60 is connected to the cabinet 100. At this time, the supporting structure 60 can be part of the cabinet 100. The cabinet 100 can provide an installation base for the supporting structure 60 and can share the force on the supporting structure 60 to improve the support performance of the load-bearing structure.

[0135] In the case where the energy storage device 1000 includes a bracket 400, the bracket 400 provides support for the battery device 200 and the support structure 60 provides support for the spray device 300. Connecting the support structure 60 to the cabinet 100 allows the support structure 60 and the bracket 400 to be independent of each other, reducing the risk of mutual interference between the battery device 200 and the spray device 300 during installation.

[0136] In this embodiment, the supporting structure 60 is connected to the cabinet 100 so that the cabinet 100 provides a fixed foundation for the supporting structure 60, which can further reduce the risk of mutual interference between the spray device 300 and the battery device 200 during installation.

[0137] refer to Figure 7 , Figure 8 In some embodiments, the second part 62 is provided with a slot 621 on the side facing the corresponding battery device 200, and the spray device 300 is engaged in the slot 621.

[0138] The slot 621 refers to the slot structure on the second part 62 used to fix the spray device 300. The slot 621 can be a square slot structure, a circular slot structure, or a slot structure of other shapes. The number of slots 621 can be one, two or more. The slot 621 can be a slot structure opened on the second part 62, or the slot 621 can be formed by deformation of the second part 62.

[0139] The slot 621 is provided on the side of the second part 62 facing the corresponding battery device 200. The corresponding battery device 200 of the second part 62 refers to the battery device 200 supported by the support structure 60 corresponding to the second part 62. With the slot 621 provided on the side of the second part 62 facing the corresponding battery device 200, a part of the spray device 300 can be located in the slot 621. The displacement of the spray device 300 is restricted by the side wall of the slot 621, and the spray device 300 is supported by the second part 62, thereby fixing at least a part of the spray device 300 in the space 10.

[0140] The spray device 300 is snapped into the slot 621, and the spray device 300 can abut against the inner wall of the slot 621 so that the slot 621 can restrict the displacement of the spray device 300; the part of the spray device 300 that is snapped into the slot 621 can be interference-fitted with the slot 621 so that the slot 621 can better restrict the displacement of the spray device 300.

[0141] For example, when there is a gap between the battery device 200 and the second part 62 of the corresponding support structure 60 in the first direction, during the installation of the spray device 300, a portion of the spray device 300 is inserted into the gap between the battery device 200 and the second part 62. After the portion of the spray device 300 is fully inserted into the gap between the battery device 200 and the second part 62, a portion of the spray device 300 can fall into the slot 621 and be engaged with the slot 621, thereby fixing the spray device 300.

[0142] In this embodiment, a slot 621 is provided on the second part 62 to fix the spray device 300. The slot 621 facilitates the installation and removal of the spray device 300. When the battery device 200 is installed on the bracket 400 first, the spray device 300 can be inserted into the gap space 10 between two adjacent battery devices 200 and locked in the slot 621, so that the installation step of the spray device 300 can be carried out after the battery device 200 is installed, and the spray device 300 can be fixed.

[0143] refer to Figure 7 , Figure 8 In some embodiments, the number of support structures 60 is at least two, and the at least two support structures 60 are arranged at intervals along a second direction, with the interval space 10 formed between two adjacent support structures 60, and the second direction is perpendicular to the first direction; in the second direction, the two sides of the battery device 200 are respectively connected to the two support structures 60, and the spray device 300 is located between the two support structures 60.

[0144] The number of supporting structures 60 is at least two, that is, the number of supporting structures 60 can be two, three or more.

[0145] At least two support structures 60 are arranged along the second direction, and a space 10 is formed between the two support structures 60 arranged at intervals along the second direction. That is, at least two support structures 60 support the same battery device 200, and at least two support structures 60 respectively support the two sides of the battery device 200 along the second direction. In other words, at least two second parts 62 of support structures 60 are provided between two adjacent battery devices 200.

[0146] The second direction can be the length direction of the energy storage device 1000, the width direction of the energy storage device 1000, or other directions; the second direction is perpendicular to the first direction. When the first direction is the height direction of the energy storage device 1000, the second direction can be the length direction or the width direction of the energy storage device 1000; for example, the first direction is the height direction of the energy storage device 1000, and the second direction is the length direction of the energy storage device 1000.

[0147] When there are at least two support structures 60, the battery device 200 presses the surface of the support structure 60 against the first part 61 of the two support structures 60 on both sides along the second direction. At this time, the gap space 10 is formed between the two support structures 60, that is, the gap space 10 is formed by the two adjacent battery devices 200 and the support structure 60 between them.

[0148] When a portion of the spray device 300 is housed in the space 10, the portion of the spray device 300 is located between two supporting structures 60. At this time, the portion of the spray structure can also be pressed against the second part 62 so that the second part 62 can support and fix the spray device 300.

[0149] In this embodiment, at least two supporting structures 60 are arranged at intervals to form an interval space 10, providing installation space for the spray device 300.

[0150] refer to Figures 10 to 14 In some embodiments, the spray device 300 includes a pipe 41 for the flow of spray medium, and a through hole 411 for the spray medium to be discharged outside the pipe 41; the battery device 200 includes a battery cell 30, and a pressure relief mechanism 35 is provided on one side of the battery cell 30 along a first direction; in the first direction, the through hole 411 corresponds to the pressure relief mechanism 35.

[0151] Pipe fitting 41 refers to the structure in the spray device 300 used to contain the spray medium and to allow the spray structure to flow. The cross-sectional shape of pipe fitting 41 can be circular, square or other shapes. Pipe fitting 41 can extend in a straight line or bend along a reference straight line. The number of pipe fittings 41 can be one, two or more. The material of pipe fitting 41 can include metal, plastic or other materials.

[0152] A through hole 411 refers to a hole structure provided on the pipe fitting 41. The through hole 411 penetrates the side wall of the pipe fitting 41 so that the spraying medium inside the pipe fitting 41 can be discharged to the outside of the pipe fitting 41 through the through hole 411. The through hole 411 can be a square hole, a round hole, or a hole structure of other shapes. The through hole 411 can be a straight hole, a stepped hole, a conical hole, or a hole structure of other shapes. The number of through holes 411 can be one, or two or more.

[0153] A battery cell 30 refers to the smallest unit that makes up the battery device 200. The number of battery cells 30 can be one, two or more. When the number of battery cells 30 is at least two, the battery cells 30 can be connected in series, in parallel or in a mixed manner. The battery cells 30 can be arranged in one direction or in an array along two different directions.

[0154] The pressure relief mechanism 35 refers to the structure in the battery cell 30 used to discharge the gas inside the battery cell 30. The pressure relief mechanism 35 is located on the outer shell of the battery cell 30. The pressure relief mechanism 35 may include an explosion-proof valve, or an explosion-proof diaphragm, explosion-proof sheet or other structures.

[0155] For example, the pressure relief mechanism 35 can be actuated to release the internal pressure or temperature of the battery cell 30 when the internal pressure or temperature reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 30 reaches the predetermined threshold, the pressure relief mechanism 35 performs an action or a weak structure provided in the pressure relief mechanism 35 is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The design of the predetermined threshold can vary depending on the design requirements. The predetermined threshold can depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 30. "Actuation" refers to the pressure relief mechanism 35 being activated or reaching a certain state, thereby releasing the internal pressure and temperature of the battery cell 30. The actions of the pressure relief mechanism 35 may include, but are not limited to: the movement of components in the pressure relief mechanism 35 to form an exhaust channel, at least a part of the pressure relief mechanism 35 being ruptured, broken, torn, or opened, etc. When the pressure relief mechanism 35 is actuated, the high-temperature and high-pressure substances inside the battery cell 30 will be discharged outward from the actuated part as emissions. In this way, the battery cell 30 can be depressurized and de-temperatureed under controllable pressure or temperature. The emissions from the battery cell 30 include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0156] For example, the pressure relief mechanism 35 may be integrally formed with the housing of the battery cell 30; for example, the pressure relief mechanism 35 may also be separately provided and connected to the housing of the battery cell 30.

[0157] The pressure relief mechanism 35 corresponds to the through hole 411 in the first direction, that is, the orthogonal projection of the pressure relief structure along the first direction can cover at least a portion of the through hole 411.

[0158] In the event of thermal runaway of the battery cell 30, the high-temperature and high-pressure flue gas can be discharged to the housing 20 of the battery device 200 through the pressure relief mechanism 35. The spray medium can be sprayed onto the housing 20 of the battery device 200 through the through hole 411. At this time, the spray medium is sprayed at the location corresponding to the pressure relief mechanism 35, so that the spray medium can reduce the temperature of the housing 20 of the battery device 200 corresponding to the pressure relief mechanism 35 more effectively and faster, so as to better control the thermal runaway of the battery cell 30 and suppress the spread of thermal runaway.

[0159] For example, in the event of thermal runaway of the battery cell 30, high-temperature and high-pressure flue gas may damage the housing 20 of the battery device 200 through high pressure or high temperature and form a hole. This hole is opposite to the pressure relief structure. At this time, the spray medium can be sprayed on the hole of the battery device 200 through the through hole 411. The spray medium can be sprayed directly onto the pressure relief mechanism 35 through the hole, so that the spray medium can reduce the temperature of the pressure relief mechanism 35 more effectively and faster, so as to better control the thermal runaway of the battery cell 30 and suppress the spread of thermal runaway.

[0160] This embodiment provides a specific structure of the spray device 300. A through hole 411 is provided on the pipe 41 of the spray device 300, and the through hole 411 corresponds to the pressure relief mechanism 35 of the battery cell 30. In the event of thermal runaway of a battery cell 30 in the battery device 200, this arrangement allows the spray medium to directly correspond to the pressure relief mechanism 35 and spray onto the pressure relief mechanism 35, so as to spray the thermally runaway battery cell 30 more specifically and to better suppress the spread of thermal runaway.

[0161] refer to Figures 10 to 14 In some embodiments, the battery device 200 includes a housing 20 having a first wall 21 located between the respective battery cell 30 and the spray device 300. The first wall 21 includes a main body 211 and a weak portion 212 connected to the main body 211. The weak portion 212 is used to release pressure inside the housing 20. In a first direction, the weak portion 212 corresponds to the pressure relief mechanism 35 and the weak portion 212 corresponds to the through hole 411.

[0162] The housing 20 refers to the structure in the battery device 200 that provides space for housing the battery cells 30 and other structures; the housing 20 can be prismatic, cylindrical or other shapes; the material of the housing 20 can be metal, plastic or other materials.

[0163] The first wall 21 refers to the structure in the housing 20 used to provide protection for the battery cell 30 or other components. The first wall 21 can be a circular plate structure, a square plate structure, or a structure of other shapes. The first wall 21 can be connected to the other walls of the housing 20 by welding, bonding, or other means. The first wall 21 can also be integrally formed with the other walls of the housing 20. The material of the first wall 21 can include metal, plastic, or other materials.

[0164] The main body 211 refers to the part of the first wall 21 that is mainly used to provide protection for the battery cell 30 or other structures. The main body 211 can also be connected to other walls of the housing 20. The shape of the main body 211 can be a circular plate, a square plate, or other shapes.

[0165] The weak part 212 refers to the part of the first wall 21 that is weaker than the main body 211. The shape of the weak part 212 can be a circular plate, a square plate, or other shapes. The weak part 212 is connected to the main body 211. The weak part 212 can be connected to the main body 211 by welding, bonding, snapping, or other means. The weak part 212 can also be integrally formed with the main body 211.

[0166] For example, the weak part 212 is integrally formed with the main body 211. In this case, the thickness of the weak part 212 can be less than that of the main body 211. Alternatively, grooves or other structures can be provided on the edge of the weak part 212 so that the high-temperature and high-pressure flue gas generated by thermal runaway can break the first wall 21 at the weak part 212.

[0167] For example, the weak part 212 is installed on the main body 211. At this time, the material of the weak part 212 can be different from the material of the main body 211. The weak part 212 can be made of a material with lower strength. At this time, a mounting hole can be provided through the main body 211 and the weak part 212 can be installed in the mounting hole so that the high temperature and high pressure flue gas generated by thermal runaway can break the first wall 21 at the weak part 212.

[0168] The weak section 212 is used to relieve pressure inside the housing 20. In the event of thermal runaway of one or more battery cells 30 inside the housing 20, the pressure or temperature inside the housing 20 will rise. When the pressure or temperature inside the housing 20 rises to a preset threshold, the weak section 212 will break, so that the pressure inside the housing 20 can be released from the weak section 212 to the space outside the housing 20. The preset threshold can be controlled by adjusting the mechanical properties, heat resistance properties or other properties of the weak section 212.

[0169] The weak part 212 corresponds to the pressure relief mechanism 35 of the battery cell 30. In the event of thermal runaway of the battery cell 30, the high temperature and high pressure flue gas generated by the thermal runaway can be sprayed towards the corresponding weak part 212 and cause the weak part 212 to break. The high temperature and high pressure flue gas generated by the thermal runaway can melt at least part of the weak part 212 by temperature or break through at least part of the weak part 212 by pressure, so as to cause the weak part 212 to break.

[0170] The weak part 212 corresponds to the pressure relief mechanism 35, and the weak part 212 also corresponds to the through hole 411. That is, the pressure relief structure, the weak part 212 and the through hole 411 are arranged in sequence along the first direction. In the case of thermal runaway of the battery cell 30, the high temperature and high pressure flue gas generated by the thermal runaway can be sprayed towards the corresponding weak part 212 and cause the weak part 212 to break. At this time, the spray medium can be sprayed directly onto the broken weak part 212 through the through hole 411, and the spray medium can also be sprayed directly onto the pressure relief mechanism 35 through the broken weak part 212, so that the spray medium can reduce the temperature of the pressure relief mechanism 35 more effectively and faster, so as to better control the thermal runaway of the battery cell 30 and suppress the spread of thermal runaway.

[0171] The first wall 21 is the wall of the housing 20 located between the battery cell 30 and the spray device 300, so that the weak part 212 can correspond to both the pressure relief mechanism 35 and the through hole 411.

[0172] For example, the pressure relief mechanism 35 is located at the upper end of the battery cell 30 along the height direction of the energy storage device 1000, the first wall 21 is located above the battery cell 30 and is the upper wall of the housing 20 along the height direction of the energy storage device 1000, and the spray device 300 is located above the first wall 21; in the case of thermal runaway of the battery cell 30, the high temperature and high pressure flue gas generated by the thermal runaway can be sprayed towards the corresponding weak part 212 and cause the weak part 212 to break, and the spray medium can be sprayed downward through the through hole 411 and the broken weak part 212 directly onto the pressure relief mechanism 35.

[0173] In this embodiment, a weak part 212 is provided on the first wall 21 of the housing 20, and the weak part 212 corresponds to the pressure relief mechanism 35 of the battery cell 30. In the event of thermal runaway of the battery cell 30, the high-temperature and high-pressure flue gas ejected by the pressure relief mechanism 35 can melt the weak part 212, so that the through hole 411 of the pipe can be directly opposite the pressure relief mechanism 35, thereby allowing the spraying medium to be directly sprayed onto the corresponding pressure relief mechanism 35, thereby better suppressing the thermal runaway of the battery cell 30 and better suppressing the spread of thermal runaway.

[0174] refer to Figures 12 to 14 In some embodiments, the size of the weak portion 212 is smaller than the size of the main portion 211 in the first direction.

[0175] The weak part 212 is smaller in size in the first direction than the main body 211 in the first direction, so that the strength of the weak part 212 in the first direction is less than the strength of the main body 211 in the first direction.

[0176] When the dimension of the weak portion 212 in the first direction is smaller than the dimension of the main body portion 211 in the first direction, the weak portion 212 can be formed by locally thinning the thickness of the first wall 21 on the side facing the battery cell 30, or the weak portion 212 can be formed by locally thinning the thickness of the first wall 21 on the side facing the spray device 300.

[0177] Since the weak part 212 corresponds to the pressure relief mechanism 35 and the through hole 411 on both sides along the first direction, the size of the weak part 212 in the first direction is smaller than the size of the main body 211 in the first direction. This allows the weak part 212 to be damaged and broken by the high temperature and high pressure flue gas generated by thermal runaway before the main body 211, so that the spray medium can fall directly onto the pressure relief mechanism 35 through the broken weak part 212.

[0178] This embodiment provides specific structures for some weak parts 212, making the thickness of the weak parts 212 smaller than the thickness of the main body 211, so that the weak parts 212 are more likely to break in the event of thermal runaway of the battery cell 30, so that the spray medium can be directly sprayed onto the corresponding pressure relief mechanism 35 through the broken weak parts 212, thereby enabling the spray device 300 to better suppress the thermal runaway of the battery cell 30 and the spread of thermal runaway.

[0179] refer to Figures 12 to 14 In some embodiments, a groove 213 is provided on the side of the first wall 21 facing the battery cell 30 to form a weak portion 212 on the first wall 21.

[0180] The groove 213 refers to the groove structure provided on the first wall 21. The groove 213 can be a circular groove, an oblong groove, a square groove, or other shaped groove structure. The cross-sectional shape of the groove 213 can be square, trapezoidal, semi-circular, or other shapes.

[0181] The thickness of the first wall 21 at the groove 213 can be less than its thickness at other parts outside the groove 213. At this time, the strength of the first wall 21 at the groove 213 is lower, so that a weak part 212 can be formed at the groove 213. When the weak part 212 corresponds to the pressure relief mechanism 35 of the battery cell 30, the groove 213 also corresponds to the pressure relief mechanism 35 of the battery cell 30.

[0182] The groove 213 is located on the side of the first wall 21 facing the battery cell 30, that is, the groove 213 is located on the side of the first wall 21 facing the inside of the battery device 200. At this time, the surface of the first wall 21 facing the outside of the battery device 200 can be relatively flat. The groove 213 is located on the side of the first wall 21 facing the battery cell 30, which can reduce the negative impact that the groove 213 may have on the surface flatness of the first wall 21.

[0183] In this embodiment, a groove 213 is provided on the side of the first wall 21 facing the battery cell 30 to form a weak part 212. This arrangement can make the thickness of the weak part 212 less than the thickness of the main body 211, and can also reduce the negative impact of the weak part 212 on the surface of the first wall 21 facing away from the battery device 200.

[0184] refer to Figure 7 , Figure 8 , Figure 10 In some embodiments, the spraying device 300 further includes a beam 42 connected to the pipe fitting 41 and also connected to the supporting structure 60.

[0185] The beam 42 refers to the structure in the spray device 300 used to provide an installation foundation for the pipe fitting 41. The beam 42 can be a square plate structure, a prism structure, a cylindrical structure, or other shapes. There can be one, two, or more beams 42. The beam 42 is connected to the pipe fitting 41 by welding, bonding, snap-fitting, screwing, or other means. The material of the beam 42 can include metal, plastic, or other materials.

[0186] The beam 42 is also connected to the supporting structure 60. The beam 42 may be pressed against or placed on the supporting structure 60. The beam 42 may also be connected to the supporting structure 60 by bolting, snap-fitting or other means.

[0187] For example, when the battery devices 200 are stacked and spaced along the height direction of the energy storage device 1000, the pipe 41 can be connected above the beam 42 or connected above the beam 42. For example, when the battery devices 200 are stacked and spaced along the height direction of the energy storage device 1000, the beam 42 can be a straight structure, in which case the pipe 41 can be connected below the beam 42, and at least a portion of the pipe 41 can be located between two supporting structures 60. For example, when the battery devices 200 are stacked and spaced along the height direction of the energy storage device 1000, a portion of the beam 42 can be bent downwards, and an installation space can be created above the beam 42, in which case the pipe 41 can be connected above the beam 42 and located within the installation space, and at least a portion of the pipe 41 can be located between two supporting structures 60.

[0188] For example, if there is a gap between the battery device 200 along the height direction of the energy storage device 1000 and the second part 62, the dimension of the beam 42 in the height direction of the energy storage device 1000 can be less than or equal to the dimension of the gap, so that the beam 42 can be inserted into the gap.

[0189] For example, when the bearing structure is provided with a slot 621, a part of the beam 42 is located in the slot 621. At this time, the size of the slot 621 in the height direction of the energy storage device 1000 can be larger than the size of the beam 42, or equal to or smaller than the size of the beam 42. When there are multiple beams 42, there can also be multiple slots 621, and each slot 621 can correspond to each beam 42.

[0190] This embodiment provides some specific structures of the spray device 300, with a beam 42 to support the pipe 41 and to connect the beam 42 to the supporting structure 60 so as to fix the pipe 41 between two adjacent battery cells 30.

[0191] refer to Figures 5 to 9 In some embodiments, the spray device 300 includes a spray assembly 40 and a spray circuit 50 in communication with the spray assembly 40, at least a portion of the spray assembly 40 being located within the space 10 and the spray circuit 50 being located outside the space 10.

[0192] The spray assembly 40 refers to the structure in the spray device 300 corresponding to the battery device 200. The spray assembly 40 can contain the spray medium and spray the spray medium onto the corresponding battery device 200. At least a portion of the spray assembly 40 is located within the space 10, that is, the spray assembly 40 can be completely located within the space 10 or only partially located within the space 10. The number of spray assemblies 40 can be one, two or more. When there are two or more spray assemblies 40, each spray assembly 40 can be located in a different space 10.

[0193] For example, in the case where the sprinkler system 300 includes a pipe 41 and a beam 42, the sprinkler system 300 may include a pipe 41 and a beam 42.

[0194] For example, during the installation of the battery device 200, the battery device 200 can be installed first, and the battery devices 200 can be stacked and spaced apart; then, the spray assembly 40 can be inserted into the space 10 between two adjacent battery devices 200.

[0195] The spray circuit 50 refers to the structure in the spray device 300 used to provide spray medium to the spray assembly 40. The spray circuit 50 may include pipes or flow channel structures installed in the cabinet 100 to provide spray medium to the spray assembly 40 through pipes or flow channel structures. The spray circuit 50 is connected to the spray assembly 40. The spray circuit 50 may be connected to the spray assembly 40 by screwing, snapping, welding, bonding or other means so that the spray circuit 50 can be connected to the spray assembly 40 and can provide spray medium to the spray assembly 40.

[0196] For example, a valve can be installed at the connection between the spray circuit 50 and the spray assembly 40 to control whether the spray assembly 40 sprays the spray medium to the corresponding battery device 200. Specifically, when the battery device 200 is working, the valve is closed, and no spray medium may remain in the spray assembly 40. In the event of thermal runaway of the battery device 200, the corresponding valve opens, and the spray medium enters the corresponding spray assembly 40 from the spray circuit 50 through the valve and is sprayed onto the corresponding thermal runaway battery device 200.

[0197] For example, if a through hole 411 is provided on the pipe fitting 41, a valve may also be provided in the through hole 411 to control the opening and closing of a single through hole 411, thereby allowing the spraying medium in the spray assembly 40 to flow to the corresponding battery device 200 through the opened valve and the corresponding through hole 411.

[0198] The spray circuit 50 is located outside the space 10. One end of the spray circuit 50 can be connected to the spray assembly 40 to provide spray medium to the spray assembly 40, and the other end of the spray circuit 50 can be connected to the spray medium supply device or other structure.

[0199] This embodiment provides a specific structure of the spray device 300, which includes a spray circuit 50 and a spray assembly 40, and the spray assembly 40 is located in the space 10 so as to spray the spray medium to the corresponding battery device 200 through the spray assembly 40; at the same time, the spray circuit 50 is provided so as to provide the spray medium to the spray assembly 40 through the spray circuit 50.

[0200] refer to Figures 7 to 9 In some embodiments, the spray assembly 40 includes a first connector 43, and the spray circuit 50 includes a second connector 51. The first connector 43 is detachably connected to the second connector 51 so that the spray assembly 40 is connected to the spray circuit 50.

[0201] The first connector 43 refers to the structure in the spray assembly 40 that is connected to the pipe fitting 41. The first connector 43 can be a threaded connector, a snap-fit ​​connector, a flared connector, or other types of connectors. The first connector 43 is connected to the pipe fitting 41 so that the spraying medium can enter the pipe fitting 41 through the first connector 43. The first connector 43 can be connected to the pipe fitting 41 by screwing, snapping, bonding, welding, or other means. The material of the first connector 43 can include metal, plastic, or other materials.

[0202] The second connector 51 refers to the structure in the spray device 300 that is connected to the spray circuit 50. The second connector 51 can be a threaded connector, a snap-fit ​​connector, a flared connector, or other types of connectors. The second connector 51 is connected to the spray circuit 50 so that the spray medium can be discharged from the spray circuit 50 through the second connector 51. The second connector 51 can be connected to the spray circuit 50 by screwing, snapping, bonding, welding, or other means. The material of the second connector 51 can include metal, plastic, or other materials.

[0203] The first connector 43 is connected to the second connector 51 so that the spraying medium in the spraying circuit 50 can enter the spraying assembly 40 through the second connector 51 and the first connector 43.

[0204] The first connector 43 is detachably connected to the second connector 51 to facilitate the installation of the spray assembly 40 and the spray circuit 50; the first connector 43 can be detachably connected by clamp connection, bolt connection, snap connection or other means; the first connector 43 is detachably connected to the second connector 51 to facilitate the installation, disassembly and maintenance of the spray assembly 40.

[0205] When the first connector 43 is detachably connected to the second connector 51, the installation process of the spray assembly 40 can be carried out after the installation process of the battery device 200. That is, the battery devices 200 can be stacked and spaced apart first, and then the spray assembly 40 can be inserted into different space 10, and the first connector 43 of each spray assembly 40 can be connected to the second connector 51 on the spray circuit 50 respectively.

[0206] In the assembly sequence, the gap space 10 between the battery devices 200 can provide assembly tolerance during the assembly process of each battery device 200, thereby reducing the risk of collision between the battery devices 200 during installation. After each battery device 200 is installed, the gap space 10 is empty. At this time, the spray assembly 40 can be inserted into the gap space 10 to spray each battery device 200. This allows for targeted spraying of each battery device 200, thereby preventing thermal runaway of the battery device 200 and hindering its spread. At the same time, the gap space 10 can be utilized to improve the space utilization rate within the cabinet 100.

[0207] The installation process of the spray circuit 50 can be performed before or after the installation process of the battery device 200.

[0208] In this embodiment, a first connector 43 and a second connector 51 are respectively provided on the spray assembly 40 and the spray circuit 50, so that the spray circuit 50 can provide spray medium to the spray assembly 40 through the first connector 43 and the second connector 51; the detachable connection of the first connector 43 and the second connector 51 facilitates the installation, disassembly and maintenance of the spray assembly 40.

[0209] In some embodiments, the energy storage device 1000 includes a cabinet 100, a battery device 200, a spray device 300, and a support 400.

[0210] The bracket 400 is installed inside the cabinet 100. The battery devices 200 are stacked on the bracket 400 at intervals along the height direction of the energy storage device 1000, and a gap space 10 is formed between two adjacent battery devices 200 along the height direction of the energy storage device 1000.

[0211] The battery device 200 includes a housing 20, the housing 20 having a first wall 21 at its upper end along the height direction of the energy storage device 1000, and the first wall 21 having a plurality of weak points 212; the battery cell 30 having a pressure relief mechanism 35 at its upper end along the height direction of the energy storage device 1000, and the pressure relief mechanism 35 being correspondingly arranged with the weak points 212.

[0212] The spray device 300 includes a spray assembly 40 and a spray circuit 50 connected to the spray assembly 40. There are multiple spray assemblies 40, which are respectively arranged in each interval space 10. The spray assembly 40 includes a beam 42 and a pipe 41 connected to the beam 42. The pipe 41 is provided with a through hole 411, which is located below the pipe 41 along the height direction of the energy storage device 1000. The through hole 411 corresponds to the weak part 212 of the battery device 200 located below the pipe 41 along the height direction of the energy storage device 1000.

[0213] The bracket 400 is provided with a support structure 60, which has a first part 61 and a second part 62 integrally formed with the first part 61; the battery device 200 is pressed on the first part 61, and the battery device 200 and the second part 62 are spaced apart along the height direction of the energy storage device 1000. The second part 62 is provided with a slot 621, and one end of the beam 42 is engaged in the slot 621.

[0214] Secondly, refer to Figure 15 This application also provides an assembly method for an energy storage device 1000, which is applied to the energy storage device 1000 provided in some embodiments of the first aspect.

[0215] Assembly methods include: S510: Stacked battery devices 200, wherein adjacent battery devices 200 are spaced apart to form a gap space 10.

[0216] In this step, the battery devices 200 are first stacked and installed in the cabinet 100. During the installation of each battery device 200, a gap space 10 is set between two adjacent battery devices 200 to provide assembly tolerance space for the battery devices 200, thereby reducing the risk of collision between adjacent battery devices 200 during the installation process.

[0217] After each battery device 200 is installed, the space 10 is the space structure between two adjacent battery devices 200. The space 10 no longer has the function of preventing adjacent battery devices 200 from colliding, that is, the space 10 is empty and has no other function.

[0218] In this step, a support member can be installed inside the cabinet 100 to support each battery device 200. The support member can be an independent structural member or a part of the cabinet 100.

[0219] S520: The spray device 300 is inserted into the interval space 10, wherein the spray device 300 is connected to the supporting structure 60.

[0220] The sprinkler device 300 refers to the device in the energy storage device 1000 used to spray a spraying medium onto the battery device 200. The sprinkler device 300 may include a nozzle, a spray pipe or other structure. The spraying medium refers to a medium that can be sprayed onto the battery device 200 in the event of thermal runaway and can suppress thermal runaway and heat propagation. The state of the spraying medium can be liquid, gas, solid or gas-liquid mixture. The spraying medium may include water, aerosol or other fire-fighting media.

[0221] The supporting structure 60 refers to the structure in the energy storage device 1000 used to provide an installation foundation for the spray device 300. The supporting structure 60 may include a plate structure, a frame structure, or other shapes. The supporting structure 60 may be an independent structure and located inside the cabinet 100, or it may be part of the cabinet 100 and connected to it. The number of supporting structures 60 may be one, two, or more. The material of the supporting structure 60 may include metal, plastic, or other materials.

[0222] In this step, the spraying device 300 is inserted into the interval space 10. At this time, the spraying device 300 can be partially contained in the interval space 10, or the entire spraying device 300 can be contained in the interval space 10. If there are multiple interval spaces 10, different parts of the spraying device 300 can be contained in different interval spaces 10.

[0223] In this step, the spray device 300 can be connected to the supporting structure 60 by screwing, snapping or other means, or the spray device 300 can be placed on the supporting structure 60 alone; when the spray device 300 is connected to the supporting structure 60, the battery device 200 can be fixed in the cabinet 100 by other structures, or the battery device 200 can be connected to the supporting structure 60.

[0224] Step S520 is located after step S510, that is, the assembly step of the spray device 300 is after the assembly step of the battery device 200. This arrangement allows the interval space 10 to serve as an assembly tolerance space in step S510, reducing the risk of collision between adjacent battery devices 200 during assembly, and also allows the interval space 10 to serve as a receiving space for the spray device 300 in S520, so that the spray device 300 can spray each battery device 200, making full use of the interval space 10 and improving the space utilization rate within the cabinet 100.

[0225] In this embodiment, the battery devices 200 are first stacked and installed with gaps between adjacent battery devices 200 to provide tolerance space during the installation of the battery devices 200 and reduce the risk of collision between the battery devices 200 and other battery devices 200 during installation. After the battery devices 200 are installed, the spraying device 300 is inserted into the gap space 10 so that the spraying device 300 can spray a single battery device 200. At the same time, the gap space 10 reserved for the installation of the battery devices 200 is fully utilized, improving space utilization.

[0226] In some embodiments, the support structure 60 includes a first part 61 and a second part 62 connected to the first part 61.

[0227] The first part 61 refers to the part of the supporting structure 60 used to support the battery device 200. The first part 61 can be a square plate structure, a prism structure, or a structure of other shapes. The material of the first part 61 can include metal, plastic, or other materials.

[0228] The second part 62 refers to the portion of the supporting structure 60 used to support the spray device 300. The second part 62 can be a square plate structure, a cold column structure, or other shapes. The second part 62 is connected to the first part 61. The second part 62 can be connected to the first part 61 by welding, bonding, screwing, or other means. The second part 62 can also be integrally formed with the first part 61. The material of the second part 62 can include metal, plastic, or other materials. The material of the second part 62 can be the same as or different from that of the first part 61.

[0229] For example, when the supporting structure 60 is connected to the bracket 400, the first part 61 can be connected to the bracket 400 by welding, bonding, screwing, snapping or other means; at this time, the second part 62 is connected to the side of the first part 61 away from the bracket 400.

[0230] For example, when the supporting structure 60 is connected to the cabinet 100, both the first part 61 and the second part 62 can be connected to the cabinet 100. In this case, the first part 61 and the second part 62 can be connected to the cabinet 100 by welding, bonding, screwing, snapping or other means.

[0231] For example, the first part 61 and the second part 62 are integrally formed. The first part 61 and the second part 62 are different parts of the support structure 60 according to their functions. That is, the part of the support structure 60 that supports the battery device 200 is the first part 61, and the part of the support structure 60 that supports the spray device 300 is the second part 62.

[0232] The step of stacking and mounting the battery device 200 includes: that is, in S510: pressing the battery device 200 against the first part 61.

[0233] In this step, the battery device 200 is supported by the first part 61 of the support structure 60 so that the battery device 200 can be stacked at intervals in the cabinet 100.

[0234] The step of inserting the spray device 300 into the space 10 includes: that is, in S520: pressing the spray device 300 against the second part 62.

[0235] In this step, the second part 62 of the supporting structure 60 provides support for the spraying device 300 so that the spraying device 300 can be located in the space 10.

[0236] When the supporting structure 60 includes a first part 61 and a second part 62, the supporting structure 60 can provide support for both the battery device 200 and the spraying device 300 at the same time, thereby improving the utilization rate of the supporting structure 60 and reducing the space occupied by the supporting structures of the battery device 200 and the spraying device 300, thus improving space utilization.

[0237] In this embodiment, the battery device 200 and the spray device 300 are supported by the support structure 60, so as to improve the utilization rate of the support structure 60 and reduce the space occupation of the support structure of the battery device 200 and the spray device 300.

[0238] In some embodiments, the spray device 300 includes a spray assembly 40 and a spray circuit 50 in communication with the spray assembly 40, wherein at least a portion of the spray assembly 40 is located within the space 10 and the spray circuit 50 is located outside the space 10.

[0239] The spray assembly 40 refers to the structure in the spray device 300 corresponding to the battery device 200. The spray assembly 40 can contain the spray medium and spray the spray medium onto the corresponding battery device 200. At least a portion of the spray assembly 40 is located within the space 10, that is, the spray assembly 40 can be completely located within the space 10 or only partially located within the space 10. The number of spray assemblies 40 can be one, two or more. When there are two or more spray assemblies 40, each spray assembly 40 can be located in a different space 10.

[0240] The spray circuit 50 refers to the structure in the spray device 300 used to provide spray medium to the spray assembly 40. The spray circuit 50 may include pipes or flow channel structures installed in the cabinet 100 to provide spray medium to the spray assembly 40 through pipes or flow channel structures. The spray circuit 50 is connected to the spray assembly 40. The spray circuit 50 may be connected to the spray assembly 40 by screwing, snapping, welding, bonding or other means so that the spray circuit 50 can be connected to the spray assembly 40 and can provide spray medium to the spray assembly 40.

[0241] In the step of inserting the spray device 300 into the interval space 10, that is, in S520, the following steps are included: inserting the spray assembly 40 into the interval space 10.

[0242] In this step, the spray assembly 40 is inserted into the space 10 so that the spray assembly 40 can spray the spray medium onto the corresponding battery device 200.

[0243] In this step, there can be multiple spraying components 40, and multiple spraying components 40 can be inserted into different interval spaces 10 respectively.

[0244] In the case where the spray device 300 includes a spray assembly 40 and a spray circuit 50, since the spray circuit 50 is located outside the space 10, the spray circuit 50 does not interfere with the battery device 200 and the spray assembly 40. The installation step of the spray circuit 50 can be before or after S520.

[0245] In this embodiment, the spray device 300 includes a spray assembly 40 and a spray circuit 50, and the spray assembly 40 is located in the space 10 so as to spray the corresponding battery device 200 through the spray assembly 40; at the same time, the spray circuit 50 provides a spray medium to the spray assembly 40 so that the spray assembly 40 can spray the corresponding battery device 200 and suppress the thermal runaway of the corresponding battery device 200.

[0246] refer to Figure 15 In some embodiments, the spray assembly 40 includes a first connector 43, and the spray circuit 50 includes a second connector 51, with the first connector 43 detachably connected to the second connector 51.

[0247] The first connector 43 refers to the structure in the spray assembly 40 that is connected to the pipe fitting 41. The first connector 43 can be a threaded connector, a snap-fit ​​connector, a flared connector, or other types of connectors. The first connector 43 is connected to the pipe fitting 41 so that the spraying medium can enter the pipe fitting 41 through the first connector 43. The first connector 43 can be connected to the pipe fitting 41 by screwing, snapping, bonding, welding, or other means. The material of the first connector 43 can include metal, plastic, or other materials.

[0248] The second connector 51 refers to the structure in the spray device 300 that is connected to the spray circuit 50. The second connector 51 can be a threaded connector, a snap-fit ​​connector, a flared connector, or other types of connectors. The second connector 51 is connected to the spray circuit 50 so that the spray medium can be discharged from the spray circuit 50 through the second connector 51. The second connector 51 can be connected to the spray circuit 50 by screwing, snapping, bonding, welding, or other means. The material of the second connector 51 can include metal, plastic, or other materials.

[0249] The first connector 43 is connected to the second connector 51 so that the spraying medium in the spraying circuit 50 can enter the spraying assembly 40 through the second connector 51 and the first connector 43.

[0250] The first connector 43 is detachably connected to the second connector 51 to facilitate the installation of the spray assembly 40 and the spray circuit 50; the first connector 43 can be detachably connected by clamp connection, bolt connection, snap connection or other means; the first connector 43 is detachably connected to the second connector 51 to facilitate the installation, disassembly and maintenance of the spray assembly 40.

[0251] After inserting the spray device 300 into the interval space 10, the assembly method further includes: S530: Install the first connector 43 onto the second connector 51.

[0252] In this step, after the spray assembly 40 is installed in the space 10, the first connector 43 is installed on the second connector 51 so that the spray circuit 50 can provide spray medium to the spray assembly 40.

[0253] In this step, the spray assembly 40 and the spray circuit 50 are connected to each other through the first connector 43 and the second connector 51, so that the spray assembly 40 can be installed in the interval space 10 first and then connected to the spray circuit 50. This reduces the difficulty of installing the spray assembly 40 in the interval space 10 and simplifies the assembly process.

[0254] In this embodiment, a first connector 43 and a second connector 51 are provided. After the spray assembly 40 is inserted into the gap space 10, the first connector 43 is installed on the second connector 51 so that the spray assembly 40 can be connected to the spray circuit 50, thereby facilitating the spray circuit 50 to provide spray medium to the spray assembly 40.

[0255] In some embodiments, the assembly method of the energy storage device 1000 includes: S510: Stacked battery devices 200, wherein adjacent battery devices 200 are spaced apart to form a gap space 10.

[0256] In this step, each battery device 200 is installed on the first part 61 of the supporting structure.

[0257] S520: The spray device 300 is inserted into the interval space 10, wherein the spray device 300 is connected to the supporting structure 60.

[0258] In this step, the spray assembly 40 of the spray device 300 is installed in the space 10, and the spray assembly 40 is installed on the second part 62 of the supporting structure 60.

[0259] S530: Install the first connector 43 onto the second connector 51.

[0260] In this step, after the spray assembly 40 is installed in the space 10, the first connector 43 is installed on the second connector 51.

[0261] Thirdly, refer to Figure 16 This application also provides an energy storage system, including an energy storage device 1000 provided in some embodiments of the first aspect, or an energy storage device 1000 assembled by an assembly method provided in some embodiments of the second aspect.

[0262] The energy storage system also includes a power conversion device 2000, which is used to electrically connect the power generation device 3000 and the energy storage device 1000. The power conversion device 2000 can be located inside the housing space of the energy storage device 1000 or outside the housing space of the energy storage device 1000.

[0263] For example, an energy storage system may include one or more energy storage devices 1000 and a power conversion system (PCS) 2000, which is connected between the power generation equipment and the energy storage devices 1000. The power generation equipment generates electrical energy, which can be stored in the energy storage devices 1000 via the power conversion system 2000. As an example, the power generation equipment may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation equipment is not limited in this application.

[0264] Fourthly, refer to Figure 17 This application also provides a charging network, including an energy storage device 1000 provided in some embodiments of the first aspect, or an energy storage device 1000 installed by an assembly method provided in some embodiments of the second aspect, or an energy storage system provided in some embodiments of the third aspect; the charging network also includes a charging pile 4000, and the energy storage device 1000 is used to provide power to the charging pile 4000.

[0265] The charging pile 4000 is electrically connected to the energy storage device 1000, which provides power to the charging pile 4000. The charging pile 4000 is also electrically connected to the battery device 200 within the energy storage device 1000 via a cable, allowing the battery device 200 to supply its stored electrical energy to the charging pile 4000. The charging pile 4000 has one or more connectors 5000 for connecting to electrical equipment (such as vehicles) to replenish power to the equipment.

[0266] The energy storage device 1000 can be located inside the charging pile 4000 (e.g., an integrated energy storage and charging unit) or outside the charging pile 4000.

[0267] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An energy storage device, characterized in that, include: Cabinet; Battery devices are stacked in the cabinet along a first direction, with adjacent battery devices spaced apart in the first direction to form a gap. The spraying device is at least partially housed in the interval space; A support structure is housed within the cabinet. The support structure includes a first part and a second part connected to the first part. The first part supports the battery device, and the second part supports the spray device. In the first direction, the battery device is spaced apart from the second part of the corresponding support structure, and at least a portion of the spray device is located between the battery device and the second part of the corresponding support structure.

2. The energy storage device according to claim 1, characterized in that, In the first direction, the spray device is spaced apart from the adjacent battery device.

3. The energy storage device according to claim 1, characterized in that, The energy storage device also includes a bracket disposed inside the cabinet, the bracket being used to provide support for the battery device, and the battery device being stacked on the bracket; The supporting structure is connected to the bracket.

4. The energy storage device according to claim 1, characterized in that, The supporting structure is connected to the cabinet.

5. The energy storage device according to claim 1, characterized in that, The second part has a slot on the side facing the corresponding battery device, and the spray device is engaged in the slot.

6. The energy storage device according to claim 1, characterized in that, The number of the supporting structures is at least two, and the at least two supporting structures are arranged at intervals along the second direction, with the interval space formed between two adjacent supporting structures, and the second direction is perpendicular to the first direction; In the second direction, the battery device is connected to two supporting structures on both sides, and the spraying device is located between the two supporting structures.

7. The energy storage device according to any one of claims 1-4, characterized in that, The spraying device includes a pipe fitting for the flow of spraying medium, and the pipe fitting is provided with a through hole for the spraying medium to be discharged outside the pipe fitting; The battery device includes a battery cell, and the battery cell is provided with a pressure relief mechanism on one side along the first direction; In the first direction, the through hole corresponds to the pressure relief mechanism.

8. The energy storage device according to claim 7, characterized in that, The battery device includes a housing with a first wall located between the respective battery cell and the spray device. The first wall includes a main body and a weak portion connected to the main body, the weak portion being used to release pressure inside the housing. In the first direction, the weak part corresponds to the pressure relief mechanism, and the weak part corresponds to the through hole.

9. The energy storage device according to claim 8, characterized in that, In the first direction, the size of the weak portion is smaller than the size of the main body portion.

10. The energy storage device according to claim 9, characterized in that, The first wall has a groove on the side facing the battery cell to form the weak part on the first wall.

11. The energy storage device according to claim 7, characterized in that, The spraying device also includes a beam connected to the pipe fitting and the supporting structure.

12. The energy storage device according to any one of claims 1-4, characterized in that, The spraying device includes a spraying assembly and a spraying circuit connected to the spraying assembly, wherein at least a portion of the spraying assembly is located within the interval space and the spraying circuit is located outside the interval space.

13. The energy storage device according to claim 12, characterized in that, The spray assembly includes a first connector, and the spray circuit includes a second connector, wherein the first connector is detachably connected to the second connector.

14. A method for assembling an energy storage device, characterized in that, The assembly method, applied to the energy storage device as described in any one of claims 1-13, comprises: The battery devices are stacked and installed in a manner in which adjacent battery devices are spaced apart to form the space between them; The spraying device is inserted into the interval space, wherein the spraying device is connected to the supporting structure.

15. The assembly method according to claim 14, characterized in that, The supporting structure includes a first part and a second part connected to the first part; The step of stacking and mounting the battery device includes: pressing the battery device against the first part; The step of inserting the spray device into the space includes pressing the spray device against the second part.

16. The assembly method according to claim 14, characterized in that, The spraying device includes a spraying assembly and a spraying circuit in communication with the spraying assembly, wherein at least a portion of the spraying assembly is located within the interval space and the spraying circuit is located outside the interval space; The step of inserting the spray device into the interval space includes: inserting the spray assembly into the interval space.

17. The assembly method according to claim 16, characterized in that, The spray assembly includes a first connector, and the spray circuit includes a second connector, wherein the first connector is detachably connected to the second connector. After inserting the spray device into the interval space, the assembly method further includes: Install the first connector onto the second connector.

18. An energy storage system, characterized in that, Includes the energy storage device as described in any one of claims 1-13, or the energy storage device assembled by the assembly method as described in any one of claims 14-17; as well as An energy conversion device, connected to the energy storage device, for converting the current input to or output from the energy storage device into energy.

19. A charging network, characterized in that, Includes an energy storage device as described in any one of claims 1-13, or an energy storage device assembled using the assembly method described in any one of claims 14-17, or an energy storage system as described in claim 18; and A charging device, wherein the energy storage device is used to provide electrical energy to the charging device.

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