Energy storage device and energy storage system

Abstract

The embodiment of the utility model provides an energy storage device and an energy storage system. The use performance of the energy storage device can be improved. The energy storage device comprises an electrical bin and a battery bin which are arranged in the first direction, the battery bin is used for containing a battery device, the electrical bin is used for containing a fire fighting device, a dehumidification device and a power distribution main control box, the interior of the power distribution main control box is used for containing a power distribution box and a main control box, and the energy storage device comprises a first wall and a second wall which are adjacent. A first opening of the electrical bin faces the first wall, a bin door used for covering the first opening is formed in the first wall, the dehumidification device is arranged on the side, facing the electrical bin, of the bin door, and the fire fighting device is arranged on the side, close to the second wall, of the electrical bin.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery, more particularly, to a kind of energy storage device and energy storage system. BACKGROUND

[0002] Under the background of increasing support for new energy technology development globally, various energy storage-related technologies have been widely used. Energy storage devices are gradually used in various fields due to their high energy, long service life and other advantages.

[0003] Currently, various devices need to be set in the electrical compartment of the energy storage device to adapt to different use requirements, which increases the volume of the electrical compartment in the entire energy storage device, thereby affecting the volume of the battery compartment. Therefore, how to improve the space utilization of the electrical compartment in the energy storage device to improve the capacity of the battery device in the battery compartment has become a technical problem to be solved in the field. CONTENT OF THE INVENTION

[0004] The embodiments of the present application provide an energy storage device and an energy storage system, which can improve the space utilization of the electrical compartment in the energy storage device and improve the use performance of the energy storage device.

[0005] In a first aspect, the present application provides an energy storage device, comprising: an electrical compartment and a battery compartment arranged along a first direction, the battery compartment being used for accommodating a battery device, and the electrical compartment being used for accommodating a fire-fighting device, a dehumidifying device and a power distribution master control box, the interior of the power distribution master control box being used for accommodating a power distribution box and a master control box; wherein the energy storage device comprises adjacent first and second walls, a first opening of the electrical compartment faces the first wall, the first wall is formed with a compartment door for covering the first opening, the dehumidifying device is arranged on a side of the compartment door facing the electrical compartment, and the fire-fighting device is arranged on a side of the electrical compartment close to the second wall.

[0006] In the embodiments of the present application, by setting the electrical compartment of the energy storage device to accommodate the fire-fighting device, the dehumidifying device and the power distribution master control box, and the interior of the power distribution master control box to accommodate the power distribution box and the master control box, and arranging the dehumidifying device on a side of the compartment door facing the electrical compartment and the fire-fighting device on a side of the electrical compartment close to the second wall, the space utilization and integration of the electrical compartment are effectively improved, the space utilization of the energy storage device is improved, thereby facilitating the increase of the volume of the battery device that can be accommodated in the battery compartment, improving the energy density of the energy storage device, and compared with conventional energy storage devices, the dehumidifying device is arranged in the energy storage device to timely remove the condensed water in the electrical compartment, thereby reducing the influence of the condensed water on other devices in the electrical compartment and improving the use performance of the energy storage device.

[0007] In some embodiments, the fire-fighting device comprises a fire-fighting gas cylinder, and the fire-fighting gas cylinder is fixedly connected with the second wall.

[0008] In the embodiment of the present application, the fire-fighting device is provided to include a fire-fighting cylinder, and the fire-fighting cylinder is fixedly connected with the second wall. In the case that the smoke or temperature inside the energy storage device reaches a threshold value, the fire-fighting cylinder can timely perform fire-fighting treatment on the energy storage device, so as to reduce the risk of thermal runaway of the battery device in the battery compartment, thereby improving the use performance of the energy storage device.

[0009] In some embodiments, the electrical compartment further comprises a connecting component fixedly connected with the second wall, the connecting component being used to limit the displacement of the fire-fighting cylinder in a plane perpendicular to the direction of gravity; wherein the connecting component comprises a first connecting component and a second connecting component, the first connecting component and the second connecting component form a containing cavity containing part of the fire-fighting cylinder with the second wall, a first end of the first connecting component facing the second wall is fixedly connected with the second wall, a second end of the second connecting component facing the second wall is fixedly connected with the second wall, a third end of the first connecting component away from the second wall is fixedly connected with a fourth end of the second connecting component away from the second wall.

[0010] In the embodiment of the present application, by providing a connecting component fixedly connected with the second wall in the electrical compartment, the connecting component is used to limit the displacement of the fire-fighting cylinder in a plane perpendicular to the direction of gravity, and the connecting component comprises a first connecting component and a second connecting component, the first connecting component and the second connecting component form a containing cavity containing part of the fire-fighting cylinder with the second wall, a first end of the first connecting component facing the second wall is fixedly connected with the second wall, a second end of the second connecting component facing the second wall is fixedly connected with the second wall, a third end of the first connecting component away from the second wall is fixedly connected with a fourth end of the second connecting component away from the second wall, so that during the installation and disassembly of the fire-fighting cylinder, the first connecting component and the second connecting component can be used to quickly assemble the fire-fighting cylinder, which facilitates the disassembly and maintenance of the fire-fighting cylinder in the later stage, thereby improving the use performance of the energy storage device.

[0011] In some embodiments, the first end and the second end are respectively bolted with the second wall, and the third end and the fourth end are bolted. In this way, in the embodiment of the present application, by boltedly connecting the first end and the second end with the second wall, and boltedly connecting the third end and the fourth end, the efficiency of installing and disassembling the fire-fighting cylinder is effectively improved, which facilitates the disassembly and maintenance of the fire-fighting cylinder in the later stage, thereby improving the use performance of the energy storage device.

[0012] In some embodiments, the electrical compartment further includes a first limiting member, which is housed in the receiving cavity and located between the second wall and the fire-fighting gas cylinder, and the first limiting member is used to limit the rotation of the fire-fighting gas cylinder in a plane perpendicular to the direction of gravity.

[0013] In this embodiment of the application, by providing a first limiting component in the electrical compartment, the first limiting component is accommodated in the accommodating cavity and located between the second wall and the fire-fighting gas cylinder. The first limiting component is used to restrict the rotation of the fire-fighting gas cylinder in a plane perpendicular to the direction of gravity, so as to reduce the risk of the performance of the fire-fighting gas cylinder being reduced due to the rotation of the fire-fighting gas cylinder under different operating conditions, thereby improving the performance of the energy storage device.

[0014] In some embodiments, the first surface of the first limiting member facing the fire-fighting gas cylinder is a plane. Thus, in this embodiment, by setting the first surface of the first limiting member facing the fire-fighting gas cylinder to a plane, the rotation of the fire-fighting gas cylinder in a plane perpendicular to the direction of gravity is further restricted. This effectively reduces the risk of performance degradation of the fire-fighting gas cylinder due to rotation under different operating conditions, thereby improving the performance of the energy storage device.

[0015] In some embodiments, the electrical compartment further includes a second limiting member, which forms a groove structure between the second limiting member and the bottom wall of the electrical compartment. A portion of the end of the fire-fighting gas cylinder facing the bottom wall is accommodated in the groove structure, which is used to limit the displacement of the fire-fighting gas cylinder in a plane perpendicular to the direction of gravity.

[0016] In this embodiment of the application, by setting a second limiting component in the electrical compartment, a groove structure is formed between the second limiting component and the bottom wall of the electrical compartment, and the end of the fire-fighting gas cylinder facing the bottom wall is accommodated in the groove structure. The displacement of the fire-fighting gas cylinder in a plane perpendicular to the direction of gravity can be restricted by the groove structure. This effectively reduces the risk of performance degradation of the fire-fighting gas cylinder due to shaking under different operating conditions, thereby improving the performance of the energy storage device.

[0017] In some embodiments, the fire-fighting device further includes a fire-fighting pipeline for containing fire-fighting media, wherein at least a portion of the orthographic projection of the fire-fighting gas cylinder overlaps with at least a portion of the orthographic projection of the fire-fighting pipeline in a plane perpendicular to the first direction.

[0018] In this embodiment of the application, the fire-fighting device also includes a fire-fighting pipeline for containing fire-fighting media. On a plane perpendicular to the first direction, at least a portion of the orthographic projection of the fire-fighting gas cylinder and at least a portion of the orthographic projection of the fire-fighting pipeline overlap each other, further improving the space utilization and integration of the electrical compartment, thereby improving the space utilization of the energy storage device, which is conducive to increasing the volume of the battery compartment that can accommodate the battery device, thereby improving the energy density and performance of the energy storage device.

[0019] In some embodiments, the electrical compartment further includes a junction box, the main power distribution control box and the junction box are arranged along the direction of gravity, and the junction box is used to combine the output current of the battery device.

[0020] In this embodiment of the application, by setting a combiner box in the electrical compartment, and arranging the main power distribution control box and the combiner box along the direction of gravity, that is, accommodating the busbar that is electrically connected to the battery device in the combiner box, the space utilization and integration of the electrical compartment are further improved, thereby improving the space utilization of the energy storage device, which is conducive to increasing the volume of the battery device that the battery compartment can accommodate, thereby improving the energy density and performance of the energy storage device.

[0021] In a second aspect, an energy storage system is provided, including the energy storage device described in the first aspect or its various implementations. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application.

[0025] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application.

[0026] Figure 4 This is an exploded structural diagram of a battery cell provided in another embodiment of this application.

[0027] Figure 5 This is a partial structural schematic diagram of an energy storage device provided in one embodiment of this application.

[0028] Figure 6This is a schematic diagram of the structure of a connecting component provided in an embodiment of this application.

[0029] Figure 7 This is a schematic diagram of the structure of the first limiting component provided in an embodiment of this application.

[0030] Figure 8 This is a partial cross-sectional schematic diagram of an energy storage device provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1-Energy storage device; 10-Battery device; 20-Battery cell; 11-Casing; 111-First structure; 112-Second structure; 112a-Base plate; 112b-Side plate; 21-Outer shell; 22-Electrode assembly; 211-Shell; 212-End cap; 213-Pressure relief mechanism; 222-Taper; 222a-Positive electrode tab; 222b-Negative electrode tab; 214-Electrode terminal; 214a-Positive electrode terminal; 214b-Negative electrode terminal; 23-Connecting member; 30-Electrical compartment; 40-Battery compartment; 301-First opening; 310-Fire-fighting device; 320-Dehumidification device; 330-Power distribution main control box; 340-Combiner box; 311-Fire gas cylinder; 312-Fire pipeline; 510-First wall; 511-Door; 520-Second wall; 60-Connecting component; 610-First connecting component; 611-First end; 612-Third end; 620-Second connecting component; 621-Second end; 622-Fourth end; 70-Receiving cavity; 810-First limiting component; 811-First surface; 820-Second limiting component; 350-Bottom wall; 90-Groove structure; 360-Fire control panel; 370-Emergency stop button; 380-Gas alarm controller; 390-Fire control panel.

[0032] The accompanying drawings are not drawn to scale. Detailed Implementation

[0033] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0036] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0040] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0041] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0042] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0043] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery clusters may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0044] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0045] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0046] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0047] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0048] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0049] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes auxiliary battery management units, integrated switches, and other modules.

[0050] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an insulation monitoring module, a main battery management unit, and Ethernet and fiber optic conversion modules.

[0051] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0052] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0053] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. Energy storage devices, due to their high energy density and long lifespan, are increasingly used across various fields. Currently, the electrical compartment of energy storage devices requires the installation of various devices to meet different usage needs, such as fire-fighting equipment and electrical cabinets. This leads to a continuous increase in the volume of the electrical compartment within the entire energy storage device, thus affecting the volume of the battery compartment and, consequently, the number of battery devices within it. Therefore, improving the space utilization rate within the electrical compartment of energy storage devices to increase the capacity of the battery devices has become a pressing technical problem in this field.

[0054] Therefore, this application provides an energy storage device, which includes: an electrical compartment and a battery compartment arranged along a first direction. The battery compartment is used to house a battery device, and the electrical compartment is used to house a fire-fighting device, a dehumidifying device, and a power distribution main control box. The interior of the power distribution main control box is used to house a power distribution box and a main control box. The energy storage device includes an adjacent first wall and a second wall. The first opening of the electrical compartment faces the first wall, and the first wall has a door for covering the first opening. The dehumidifying device is disposed on the side of the door facing the electrical compartment, and the fire-fighting device is disposed on the side of the electrical compartment near the second wall. Thus, in this embodiment of the application, by configuring the electrical compartment of the energy storage device to accommodate fire-fighting equipment, dehumidification equipment, and a main control box, with the main control box housing the distribution box and the main control box, and placing the dehumidification equipment on the side of the compartment door facing the electrical compartment, and the fire-fighting equipment on the side of the electrical compartment near the second wall, the space utilization and integration of the electrical compartment are effectively improved, thereby increasing the space utilization of the energy storage device. This is beneficial for increasing the volume of the battery device that the battery compartment can accommodate, thereby increasing the energy density of the energy storage device. At the same time, compared with conventional energy storage devices, by providing a dehumidification device in the energy storage device, condensate in the electrical compartment is removed in a timely manner, reducing the impact of the condensate on other devices in the electrical compartment, thereby improving the performance of the energy storage device.

[0055] The technical solutions described in this application are applicable to energy storage devices of various types and sizes. For example, the energy storage device can be an energy storage container or an energy storage cabinet. The energy storage device can be, for example, a regular cuboid structure, wherein the six faces of the cuboid are the six outer walls of the energy storage device. Setting the energy storage device as a cuboid structure facilitates its fixed placement and transportation. Of course, the energy storage device can also be of other shapes; for example, at least one wall of the energy storage device may be inclined.

[0056] Figure 1 A schematic diagram of the structure of an energy storage device 1 provided in an embodiment of this application is shown.

[0057] It should be understood that, for ease of description, the embodiments in this application are described as follows: Figure 1 As shown, direction X can be the length direction of energy storage device 1, and direction X is perpendicular to direction Z and direction Y. In this embodiment, direction X can be a first direction; direction Y can be the width direction of energy storage device 1, and direction Y is perpendicular to direction Z and direction X; direction Z can be the height direction of energy storage device 1, and direction Z is perpendicular to direction X and direction Y.

[0058] like Figure 1 As shown, the energy storage device 1 provided in this embodiment may include a battery compartment 40 and an electrical compartment 30. The battery compartment 40 can accommodate multiple battery devices 10. For example, the battery compartment 40 may be provided with multiple mounting positions for the battery devices 10 along the direction of gravity to accommodate multiple battery devices 10. The battery devices 10 can be put into or removed from the mounting positions of the battery compartment 40 along the Y direction. After the battery devices 10 are installed in the mounting positions, they can be fixed by a locking mechanism.

[0059] For example, the energy storage device 1 can be rectangular, but this embodiment is not limited to this, and the energy storage device 1 can also be configured with other shapes. In addition, in order to facilitate transportation and reduce transportation costs, the energy storage device 1 in this embodiment can be a standard-sized container, for example, a 20-foot or 40-foot container, but this embodiment is not limited to this.

[0060] The energy storage device 1 may include a thermal management module that houses thermal management components for thermal management of the energy storage device 1. For example, it may heat or cool the energy storage device 1. As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 10 via piping for regulating the temperature of the individual battery cells.

[0061] To meet different power demands, the battery device 10 in this embodiment may include at least one battery cell assembly, which comprises multiple battery cells. These multiple battery cells can be electrically connected in series, parallel, or a combination thereof to form the battery device 10. A combination of series and parallel connections is used. The battery device 10 may also be referred to as a battery pack. For example, multiple battery cells can first be connected in series, parallel, or a combination to form a battery module, and then multiple battery modules can be connected in series, parallel, or a combination thereof to form the battery device 10. That is, multiple battery cells can directly form the battery device 10, or they can first be assembled into battery modules, and then the battery modules can be assembled into the battery device 10.

[0062] For example, such as Figure 2 The diagram shown is a structural schematic of a battery device 10 according to an embodiment of this application. The battery device 10 may include a plurality of battery cells 20. The battery device 10 may also include a housing 11 (or cover), the housing 11 having a hollow structure, and the plurality of battery cells 20 are housed within the housing 11. For example, the plurality of battery cells 20 may be connected in parallel, in series, or in a mixed configuration and then placed within the housing 11.

[0063] like Figure 2 As shown, the housing 11 may include two parts, referred to here as the first structure 111 and the second structure 112, which are fastened together. The shapes of the first structure 111 and the second structure 112 can be determined according to the combined shape of multiple battery cells 20. Both the first structure 111 and the second structure 112 may have an opening. For example, both the first structure 111 and the second structure 112 can be hollow cuboids with only one open face each. The openings of the first structure 111 and the second structure 112 are opposite to each other, and the first structure 111 and the second structure 112 are fastened together to form a housing 11 with a closed cavity. The second structure 112 may include a bottom plate 112a, a side plate 112b, and a beam. Multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed inside the housing 11 formed by the fastening of the first structure 111 and the second structure 112.

[0064] Optionally, the battery device 10 may also include other structures, which will not be described in detail here. For example, the battery device 10 may also include a busbar component for realizing the electrical connection between multiple battery cells 20, such as parallel, series, or mixed connection. Specifically, the busbar component can realize the electrical connection between battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the housing by a conductive mechanism. Optionally, the conductive mechanism may also be part of the busbar component.

[0065] The number of battery cells 20 can be set to any value depending on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or mixed to achieve a larger capacity or power. Since each battery device 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is unlimited and can be set according to requirements.

[0066] In this embodiment, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is not limited and can be set according to requirements. The battery device 10 may include multiple battery modules, which can be connected in series, parallel, or mixed connection.

[0067] Figure 3 This paper shows a schematic diagram of the structure of a battery cell 20 provided in an embodiment of this application. Figure 4 An exploded structural diagram of a battery cell 20 according to another embodiment of this application is shown. Figure 3 and Figure 4 As shown, the battery cell 20 in this embodiment may include a housing 21 and an electrode assembly 22. The housing 21 has a closed receiving space, and the electrode assembly 22 is placed in the receiving space within the housing 21. The housing 21 may include a shell 211 and an end cap 212. The shell 211 is a hollow structure with at least one opening; the end cap 212 is used to fasten with the shell 211 to form a housing 21 with a closed receiving space.

[0068] It should be understood that the battery cell 20 in this application embodiment can be a secondary battery. A secondary battery refers to a battery cell 20 that can be recharged after being discharged to activate the active materials and continue to be used. For example, the battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0069] The electrode assembly 22 in this embodiment includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. During the charging and discharging process of the battery cell 20, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, disposed between the positive and negative electrodes, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0070] In some embodiments, the end cap 212 may be a plate-like structure used to cover the opening of the housing 211. In other embodiments, the end cap 212 has a similar structure to the housing 211, that is, both the housing 211 and the end cap 212 are hollow structures with one opening, and the two openings are joined together to form an outer shell 21 with a closed accommodating space.

[0071] It should be understood that if the end cap 212 is a plate-like structure, the shell 211 can be a hollow structure with an opening at one or more ends. For example, if the shell 211 is a hollow structure with an opening at one end, the end cap 212 can be set as one; if the shell 211 is a hollow structure with openings at opposite ends, the end cap 212 can be set as two, with the two end caps 212 respectively covering the openings at both ends of the shell 211.

[0072] The outer shell 21 can be of various shapes, such as a cylinder, a cuboid, or other polyhedrons. For example, ... Figure 3 and Figure 4 As shown in the embodiments of this application, the description mainly takes the outer shell 21 as a cuboid structure.

[0073] It should be understood that the end cap 212 in this embodiment is used to cooperate with the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 212 can be adapted to the shape of the housing 211, such as... Figure 3 and Figure 4 As shown, the shell 211 has a cuboid structure, and the end cap 212 has a rectangular plate structure that is adapted to the shell 211.

[0074] In some embodiments, the housing 211 may be a hollow structure with an opening at at least one end, and the shape of the end cap 212 may be adapted to the shape of the housing 211. The end cap 212 is used to cover the opening of the housing 211 so that the housing 21 isolates the internal environment of the battery cell 20 from the external environment. If the housing 211 is a hollow structure with an opening at one end, the end cap 212 may be provided as one.

[0075] The material of the housing 211 in this embodiment may include one or more materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 212 may also be one or more materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 212 may be the same as or different from that of the housing 211; the materials of the different walls of the housing 211 may also be the same or different.

[0076] The end cap 212 in this embodiment can be any wall of the outer shell 21. For example, the end cap 212 can be the wall with the largest area among the multiple walls included in the outer shell 21, or the wall with the smallest area, or it can be other walls. This embodiment is not limited to this. Alternatively, the end cap 212 can also be other structures. For example, the end cap 212 can also be a groove structure with an opening to cover the opening of the shell 211. This embodiment is not limited to this.

[0077] It should be understood that the battery cell 20 also includes electrode terminals 214. In this embodiment, the electrode terminals 214 are used for electrical connection with the electrode assembly 22 inside the battery cell 20 to output the electrical energy of the battery cell 20. Figure 3 to Figure 4 As shown, the battery cell 20 may include at least two electrode terminals 214, which may include at least one positive electrode terminal 214a and at least one negative electrode terminal 214b. The positive electrode terminal 214a is used for electrical connection to the positive electrode tab 222a of the electrode assembly 22, and the negative electrode terminal 214b is used for electrical connection to the negative electrode tab 222b of the electrode assembly 22. The positive electrode terminal 214a and the positive electrode tab 222a may be directly connected or indirectly connected, and the negative electrode terminal 214b and the negative electrode tab 222b may be directly connected or indirectly connected. For example, the positive electrode terminal 214a may be electrically connected to the positive electrode tab 222a through a connecting member 23, and the negative electrode terminal 214b may be electrically connected to the negative electrode tab 222b through a connecting member 23. It should be understood that in the embodiments of this application, the positive electrode tab 222a and the negative electrode tab 222b may be collectively referred to as tab 222.

[0078] In this embodiment, the wall of the housing 211 and the wall of the end cap 212 are both referred to as the wall of the battery cell 20. Figure 3 and Figure 4 The rectangular battery cell 20 shown has a housing 211 with a bottom wall and four side walls. The housing 211 is shaped according to the combination of one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one face of the housing 211 has an opening to allow one or more electrode assemblies 22 to be placed inside. For example, when the housing 211 is a hollow cuboid or cube, one plane of the housing 211 is an open face, meaning that this plane has no wall, allowing communication between the inside and outside of the housing 211. When the housing 211 is a hollow cylinder, the end face of the housing 211 is an open face, meaning that this end face has no wall, allowing communication between the inside and outside of the housing 211. An end cap 212 covers the opening and connects to the housing 211 to form a closed cavity for placing the electrode assemblies 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0079] In this battery cell 20, the electrode assembly 22 is the component in which the electrochemical reaction occurs. Depending on actual usage requirements, the electrode assembly 22 within the casing 211 can be one or multiple. For example, as... Figure 4 As shown, two electrode assemblies 22 are provided inside the battery cell 20. The electrode assembly 22 can be a cylinder, a cuboid, etc. If the electrode assembly 22 is a cylindrical structure, the housing 211 can also be a cylindrical structure. If the electrode assembly 22 is a cuboid structure, the housing 211 can also be a cuboid structure.

[0080] In this battery cell 20, the electrode assembly 22 is the component in which the electrochemical reaction occurs. Depending on actual usage requirements, the electrode assembly 22 within the casing 211 can be one or multiple. For example, as... Figure 4 As shown, two electrode assemblies 22 are disposed within the battery cell 20. The electrode assembly 22 can be a cylinder, a cuboid, etc. If the electrode assembly 22 is a cylindrical structure, the housing 211 can also be a cylindrical structure; if the electrode assembly 22 is a cuboid structure, the housing 211 can also be a cuboid structure. In this embodiment, the material of the housing 211 may include the following materials: copper, iron, aluminum, steel, aluminum alloy, etc.

[0081] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold. When the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 213 actuates or a weak structure within the pressure relief mechanism 213 is damaged, thereby forming an opening or channel for internal pressure or temperature release. This threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0082] The pressure relief mechanism 213 provided on the battery cell 20 can be any of the possible pressure relief mechanisms 213. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell 20 with the pressure relief mechanism 213 reaches a threshold; and / or, the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal gas pressure of the battery cell 20 with the pressure relief mechanism 213 reaches a threshold.

[0083] The term "actuation" as used in this application refers to the pressure relief mechanism 213 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 213 may include, but are not limited to: movement of components within the pressure relief mechanism 213 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 213, etc. When the pressure relief mechanism 213 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as exhaust materials. This method enables pressure and temperature relief of the battery cell 20 under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0084] In some implementations, an insulating element may also be provided in the battery cell 20. The insulating element is disposed in the accommodating space of the housing 211, and the insulating element may be a hollow structure with one or more openings. The accommodating space in the hollow structure is used to accommodate the electrode assembly 22 to improve the insulation performance of the battery cell 20.

[0085] In some implementations, such as Figure 1 As shown, the energy storage device 1 includes an electrical compartment 30 and a battery compartment 40 arranged along a first direction. The battery compartment 40 is used to house the battery device 10. The electrical compartment 30 is used to house a fire-fighting device 310, a dehumidifying device 320, and a power distribution main control box 330. The interior of the power distribution main control box 330 is used to house a power distribution box and a main control box. The energy storage device 1 includes an adjacent first wall 510 and a second wall 520. The first opening 301 of the electrical compartment 30 faces the first wall 510. The first wall 510 has a door 511 for covering the first opening 301. The dehumidifying device 320 is located on the side of the door 511 facing the electrical compartment 30. The fire-fighting device 310 is located on the side of the electrical compartment 30 near the second wall 520.

[0086] It should be understood that the number of battery devices 10 housed in the battery compartment 40 in this embodiment can be set according to actual needs. Multiple battery devices 10 can be connected in series or parallel. Energy storage and release of the energy storage device 1 are achieved through the charging or discharging of the battery devices 10. In some implementations, the battery compartment 40 may include multiple battery cabinets, each of which may include one or more battery clusters. These battery clusters are composed of battery cells 20 connected in series, parallel, or series-parallel configurations. The battery compartment 40 may also contain battery piping systems, detection and protection circuits, electrical and communication structures, and other components. One battery cluster may correspond to one slave battery management unit, and multiple battery clusters may correspond to one master battery management unit.

[0087] It should also be understood that the fire-fighting device 310 installed inside the electrical compartment 30 in this embodiment can be activated when the detector inside the energy storage device 1 detects that the smoke concentration or temperature reaches a preset threshold, in order to perform fire-fighting treatment on the energy storage device 1. The type of fire-fighting device 310 inside the electrical compartment 30 can be divided into compartment-level fire protection and pipeline fire protection. For example, the device corresponding to the compartment-level fire protection can be... Figure 1 The fire-fighting gas cylinder 311 shown is capable of actively engaging in fire suppression based on changes in temperature or smoke concentration within the electrical compartment 30. The corresponding device for this pipeline fire suppression system can be... Figure 1 The fire-fighting pipeline 312 shown is connected to an external fire protection system. Fire-fighting or cooling media circulate within the pipeline, allowing for activation in case of a malfunction in the fire-fighting gas cylinder 311 or failure to achieve the expected fire-fighting effect, thereby further fire-fighting the interior of the electrical compartment 30. In some implementations, the electrical compartment 30 may be equipped with smoke and temperature sensors. These sensors can effectively monitor for fires and smoke caused by battery thermal runaway. Upon detecting an abnormality, the fire-fighting device 310 can promptly extinguish the fire to prevent further fire spread.

[0088] Because thermal runaway of the battery device 10 can lead to a large accumulation of flammable gas, causing a rapid increase in pressure or temperature within the battery compartment 40, it may result in an explosion of the battery compartment 40 or even the energy storage device 1. Therefore, the battery compartment 40 may also include a pressure relief device, which is actuated to release the internal pressure of the battery compartment 40 when the pressure or temperature within the battery compartment 40 reaches a predetermined threshold. "Actuation" as used in this application refers to the pressure relief device being activated or reaching a certain state, thereby releasing the internal pressure and temperature of the battery compartment 40. The actions of the pressure relief device may include, but are not limited to, at least a portion of the pressure relief device rupturing, breaking, tearing, or opening, etc. Optionally, the pressure relief device may include a burst pressure relief plate.

[0089] It should also be understood that the battery compartment 40 may include water-cooling pipes, low-voltage wiring harnesses, and high-voltage wiring harnesses. The water-cooling pipes can be connected to a liquid cooling unit to cool the battery assembly 10. Since water-cooling pipes may leak, and high-voltage wiring harnesses are typically used to transmit high-voltage electrical energy, a leak in the water-cooling pipes would affect the performance of the high-voltage wiring harnesses, potentially leading to a safety accident. Therefore, the water-cooling pipes need to be kept away from the high-voltage wiring harnesses. The low-voltage wiring harnesses can be located anywhere in the battery compartment 40, such as on the same side of the battery compartment 40 as the water-cooling pipes, on the same side of the battery compartment 40 as the high-voltage wiring harnesses, or in the space near the bottom of the battery compartment 40.

[0090] It should also be understood that the dehumidification device 320 in this embodiment may include a dehumidifier or a dehumidifying air conditioner. The dehumidification device 320 is used to remove condensate from the electrical compartment 30. The condensate may be generated during the use of the fire-fighting device 310 or by other devices. By installing the dehumidification device 320 in the electrical compartment 30, problems such as insulation abnormalities (which can lead to short circuits and burnout), corrosion, and sampling abnormalities in the battery device 10 caused by condensate are reduced.

[0091] It should also be understood that the first wall 510 forming a door 511 for covering the first opening 301 can mean that the door 511 can be at least a part of the first wall 510, and the door 511 can be rotatably connected to the second wall 520 to facilitate the opening or closing of the door 511. By placing the dehumidification device 320 on the side of the door 511 facing the electrical compartment 30, the space utilization and integration of the electrical compartment 30 are improved, eliminating the need to occupy additional usable space inside the electrical compartment 30, thereby improving the space utilization of the energy storage device 1. Furthermore, the dehumidification device 320 can be fixedly connected to the side of the door 511 facing the electrical compartment 30, for example, by snap-fit ​​connection or welding connection.

[0092] It should also be understood that, such as Figure 1 As shown, the first wall 510 and the second wall 520 being adjacent can mean that the second wall 520 can be two side walls opposite each other in the Y direction of the energy storage device 1, or a top wall or bottom wall opposite each other in the Z direction. Furthermore, the fire-fighting device 310 can be installed on the side of the electrical compartment 30 closest to the second wall 520 to facilitate the installation and removal of the fire-fighting device 310.

[0093] It should also be understood that the main control box 330 in this embodiment is used to house the distribution box and the main control box. The distribution box in this embodiment is used for power distribution and protection. For example, the distribution box can be used for power distribution, overload protection, short circuit protection, voltage monitoring and regulation, load piping, and safety isolation. The main control box in this embodiment is a box-type structure with control components, which can be programmable logic controllers. Besides being electrically connected to the battery, the main control box can also be connected to the main control system. The main control box can be used to control and manage at least one battery. For example, the main control box can read data such as voltage, current, and temperature of the battery during operation. Furthermore, the main control box can control the switching state of the battery. The main control box can contain core components such as a battery management system. This battery management system can perform comprehensive monitoring and control of the battery, ensuring battery safety, longevity, and stable performance. In other embodiments, the main control box can also contain various auxiliary components such as relays, fuses, indicator lights, disconnect switches, current sensors, high-voltage copper bars, and fuses.

[0094] It should also be understood that the main control box 330 may have an accommodating space inside, and the installation positions of the distribution box and the main control box within this accommodating space can be set according to actual needs. For example, the distribution box and the main control box may be arranged along the direction of gravity, that is, the distribution box is located above the main control box.

[0095] It should also be understood that, in this embodiment, the side of the door 511 facing the electrical compartment 30 may also be equipped with a fire control panel 360, an emergency stop button 370, a gas alarm controller 380, and a fire alarm control panel 390. The fire control panel 360 may include a concentration display screen, a fan start / stop button, and a gas start / stop button. The concentration display screen shows the concentration of the fire-fighting medium inside the fire-fighting device 310. Users can start or stop the corresponding fire-fighting device 310 using the fan start / stop button and the gas start / stop button. The emergency stop button 370 is used to cut off the power supply to the energy storage device 1 in an emergency. The gas alarm controller 380 can monitor changes in the gas composition or concentration inside the electrical compartment 30 in real time and trigger an alarm when the change reaches or exceeds a threshold, while simultaneously outputting a control signal to control the fire-fighting device 310 for fire suppression. The fire alarm control panel 390 is the control center of the fire protection system, capable of receiving and processing gas concentration and temperature signals, and determining whether to trigger the fire-fighting device 310.

[0096] In this embodiment, by configuring the electrical compartment 30 of the energy storage device 1 to accommodate the fire-fighting device 310, the dehumidifying device 320, and the main control box 330, and with the interior of the main control box 330 used to accommodate the distribution box and the main control box, and by placing the dehumidifying device 320 on the side of the compartment door 511 facing the electrical compartment 30, and the fire-fighting device 310 on the side of the electrical compartment 30 near the second wall 520, the space utilization and integration of the electrical compartment 30 are effectively improved, thereby improving the space utilization of the energy storage device 1. This is beneficial to increasing the volume of the battery device 10 that the battery compartment 40 can accommodate, thereby increasing the energy density of the energy storage device 1. At the same time, compared with conventional energy storage devices 1, by providing the dehumidifying device 320 in the energy storage device 1, the condensate in the electrical compartment 30 is removed in a timely manner, thereby reducing the impact of the condensate on other devices in the electrical compartment 30, thereby improving the performance of the energy storage device 1.

[0097] Figure 5 A partial structural schematic diagram of an energy storage device 1 provided in an embodiment of this application is shown.

[0098] In some implementations, such as Figure 5 As shown, the fire-fighting device 310 includes a fire-fighting gas cylinder 311, which is fixedly connected to the second wall 520.

[0099] It should be understood that the fire-fighting gas contained in the fire-fighting gas cylinder 311 in this embodiment includes at least one of the following components: carbon dioxide, nitrogen, and heptafluoropropane. Specifically, when the smoke sensor and temperature sensor in the electrical compartment 30 detect that the smoke concentration or temperature reaches a threshold, they send corresponding gas concentration and temperature signals to the fire control panel 390. The fire control panel 390 receives and processes the signals and then sends a control signal to the fire-fighting gas cylinder 311 to control the opening of the fire-fighting gas cylinder 311. In some implementations, the fire-fighting gas cylinder 311 can also be manually opened for fire fighting or extinguishing. As an example, this embodiment does not limit this.

[0100] In this embodiment, the fire-fighting device 310 is configured to include a fire-fighting gas cylinder 311, and the fire-fighting gas cylinder 311 is fixedly connected to the second wall 520. When the smoke or temperature inside the energy storage device 1 reaches a threshold, the fire-fighting gas cylinder 311 can promptly perform fire-fighting treatment on the energy storage device 1 to reduce the risk of thermal runaway of the battery device 10 in the battery compartment 40, thereby improving the performance of the energy storage device 1.

[0101] Figure 6 A schematic diagram of the structure of a connecting component 60 provided in an embodiment of this application is shown.

[0102] In some implementations, such as Figure 5 and Figure 6 As shown, the electrical compartment 30 also includes a connecting component 60, which is fixedly connected to the second wall 520. The connecting component 60 is used to limit the displacement of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity. The connecting component 60 includes a first connecting component 610 and a second connecting component 620. The first connecting component 610, the second connecting component 620 and the second wall 520 form a receiving cavity 70 for accommodating part of the fire-fighting gas cylinder 311. The first end 611 of the first connecting component 610 facing the second wall 520 is fixedly connected to the second wall 520. The second end 621 of the second connecting component 620 facing the second wall 520 is fixedly connected to the second wall 520. The third end 612 of the first connecting component 610 away from the second wall 520 is fixedly connected to the fourth end 622 of the second connecting component 620 away from the second wall 520.

[0103] It should be understood that the fixed connection between the first end 611 of the first connecting member 610 facing the second wall 520 and the second wall 520 can mean that the first end 611 and the second wall 520 can be snap-fitted or bolted together. Similarly, the fixed connection between the second end 621 of the second connecting member 620 facing the second wall 520 and the second wall 520 can also mean that the second end 621 and the second wall 520 can be snap-fitted or bolted together. Correspondingly, the fixed connection between the third end 612 of the first connecting member 610 facing away from the second wall 520 and the fourth end 622 of the second connecting member 620 facing away from the second wall 520 can mean that the third end 612 can be snap-fitted or bolted together with the fourth end 622.

[0104] In this embodiment, a connecting member 60 is provided in the electrical compartment 30. The connecting member 60 is fixedly connected to the second wall 520. The connecting member 60 is used to limit the displacement of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity. The connecting member 60 includes a first connecting member 610 and a second connecting member 620. The first connecting member 610, the second connecting member 620, and the second wall 520 form a receiving cavity 70 for accommodating part of the fire-fighting gas cylinder 311. The first end 611 of the first connecting member 610 facing the second wall 520 is fixedly connected to the second wall 520. Next, the second end 621 of the second connecting component 620 facing the second wall 520 is fixedly connected to the second wall 520, and the third end 612 of the first connecting component 610 away from the second wall 520 is fixedly connected to the fourth end 622 of the second connecting component 620 away from the second wall 520. In this way, during the installation and disassembly of the fire-fighting gas cylinder 311, the first connecting component 610 and the second connecting component 620 can be used to achieve rapid assembly of the fire-fighting gas cylinder 311, which facilitates the disassembly and maintenance of the fire-fighting gas cylinder 311 in the later stage, thereby improving the performance of the energy storage device 1.

[0105] In some implementations, such as Figure 5 and Figure 6 As shown, the first end 611 and the second end 621 are bolted to the second wall 520, and the third end 612 is bolted to the fourth end 622. Thus, in this embodiment, by setting the first end 611 and the second end 621 to be bolted to the second wall 520, and setting the third end 612 to be bolted to the fourth end 622, the efficiency of installing and disassembling the fire-fighting gas cylinder 311 is effectively improved, facilitating subsequent disassembly and maintenance of the fire-fighting gas cylinder 311, thereby improving the performance of the energy storage device 1.

[0106] In some implementations, such as Figure 5 and Figure 6As shown, the electrical compartment 30 also includes a first limiting component 810, which is housed in the receiving cavity 70 and located between the second wall 520 and the fire-fighting gas cylinder 311. The first limiting component 810 is used to restrict the rotation of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity.

[0107] It should be understood that the first limiting member 810 can be used to restrict the rotation of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity. Specifically, the first limiting member 810 can partially confine the fire-fighting gas cylinder 311 within the receiving cavity 70; that is, at least a portion of the surface of the first limiting member 810 facing the fire-fighting gas cylinder 311 can be attached to a portion of the surface of the fire-fighting gas cylinder 311 facing the first limiting member 810, thereby restricting the rotation of the fire-fighting gas cylinder 311. In some implementations, the first limiting member 810 can also provide cushioning and shock absorption for the fire-fighting gas cylinder 311 to reduce the risk of performance degradation due to severe shaking under different operating conditions. It should also be understood that the materials of the first limiting member 810 include, but are not limited to, the following: polyurethane, rubber, foam materials, fiber composite materials, silicone, polyethylene, etc.

[0108] In this embodiment of the application, by providing a first limiting component 810 in the electrical compartment 30, the first limiting component 810 is accommodated in the accommodating cavity 70 and located between the second wall 520 and the fire-fighting gas cylinder 311. The first limiting component 810 is used to limit the rotation of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity, so as to reduce the risk of the performance degradation of the fire-fighting gas cylinder 311 due to the rotation of the fire-fighting gas cylinder 311 under different operating conditions, thereby improving the performance of the energy storage device 1.

[0109] Figure 7 A schematic diagram of the structure of a first limiting component 810 provided in an embodiment of this application is shown.

[0110] In some implementations, such as Figure 7 As shown, the first surface 811 of the first limiting component 810 facing the fire cylinder 311 is a plane.

[0111] For example, such as Figure 7 As shown, the first surface 811 may include two sub-surfaces, which are attached to the portion of the fire-fighting gas cylinder 311 facing the first limiting member 810, so as to limit the fire-fighting gas cylinder 311 by the first limiting member 810, that is, to restrict the rotation of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity. It should be understood that Figure 7The structure of the first limiting component 810 shown is only an example. The first limiting component 810 can also be set according to actual needs. For example, the first limiting component 810 can be matched according to the shape of the space between the second wall 520 and the fire cylinder 311 in the receiving cavity 70.

[0112] In this embodiment of the application, by setting the first surface 811 of the first limiting component 810 facing the fire cylinder 311 as a plane, the rotation of the fire cylinder 311 on a plane perpendicular to the direction of gravity is further restricted. This effectively reduces the risk of performance degradation of the fire cylinder 311 due to rotation under different operating conditions, thereby improving the performance of the energy storage device 1.

[0113] In some implementations, such as Figure 5 As shown, the electrical compartment 30 also includes a second limiting component 820, which forms a groove structure 90 with the bottom wall 350 of the electrical compartment 30. The end portion of the fire-fighting gas cylinder 311 facing the bottom wall 350 is accommodated in the groove structure 90. The groove structure 90 is used to limit the displacement of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity.

[0114] It should be understood that the second limiting component 820 can be fixedly connected to the surface of the bottom wall 350 facing the fire cylinder 311, for example, the second limiting component 820 can be welded to the surface of the bottom wall 350 facing the fire cylinder 311.

[0115] It should also be understood that the shape of the groove structure 90 formed between the second limiting component 820 and the bottom wall 350 of the electrical compartment 30 can be set according to the shape of the orthographic projection of the fire-fighting gas cylinder 311 on a plane perpendicular to the height direction of the fire-fighting gas cylinder 311. It should also be understood that... Figure 5 The structure of the second limiting member 820 shown is merely an example, and the second limiting member 820 can also be configured with other shapes. Furthermore, the dimensions of the second limiting member 820 along the Z direction or the gravity direction can be set according to actual needs, and this application does not impose any limitations on this.

[0116] In this embodiment, by providing a second limiting component 820 in the electrical compartment 30, a groove structure 90 is formed between the second limiting component 820 and the bottom wall 350 of the electrical compartment 30, and the end of the fire-fighting gas cylinder 311 facing the bottom wall 350 is accommodated in the groove structure 90. The groove structure 90 can limit the displacement of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity, thereby effectively reducing the risk of performance degradation of the fire-fighting gas cylinder 311 due to shaking under different operating conditions, and thus improving the performance of the energy storage device 1.

[0117] Figure 8 A partial cross-sectional schematic diagram of an energy storage device 1 provided in an embodiment of this application is shown.

[0118] In some implementations, such as Figure 8 As shown, the fire-fighting device 310 also includes a fire-fighting pipeline 312 for containing fire-fighting media. On a plane perpendicular to the first direction, at least a portion of the orthographic projection of the fire-fighting gas cylinder 311 overlaps with at least a portion of the orthographic projection of the fire-fighting pipeline 312.

[0119] It should be understood that the fire-fighting pipeline 312 can be connected to an external liquid-cooled unit. The fire-fighting pipeline 312 can be located in the area of ​​the electrical compartment 30 near the second wall 520. The liquid-cooled unit can output fire-fighting medium to the fire-fighting pipeline 312. When the smoke sensor and temperature sensor detect that the smoke concentration or temperature reaches a threshold, the fire-fighting control panel 390 sends corresponding gas concentration and temperature signals to the fire-fighting control panel 390. The fire-fighting control panel 390 receives and processes these signals before sending a control signal to the fire-fighting pipeline 312 to control its opening. In some implementations, the fire-fighting pipeline 312 can also be manually opened for fire-fighting or extinguishing purposes. This is merely an example, and the embodiments of this application do not limit this approach. It should also be understood that in some implementations, when the smoke sensor and temperature sensor detect that the smoke concentration or temperature has reached a threshold, the fire control panel 390 receives the gas concentration and temperature signals, and during the process of receiving and processing the signals and sending control signals to the fire pipeline 312, the opening of the fire gas cylinder 311 is controlled first. If the fire gas cylinder 311 malfunctions or it is difficult to carry out fire protection in the electrical compartment 30, the fire pipeline 312 will then be activated to carry out fire protection in the electrical compartment 30.

[0120] In this embodiment of the application, the fire-fighting device 310 further includes a fire-fighting pipeline 312 for containing fire-fighting medium. On a plane perpendicular to the first direction, at least a portion of the orthographic projection of the fire-fighting gas cylinder 311 and at least a portion of the orthographic projection of the fire-fighting pipeline 312 overlap each other, further improving the space utilization and integration of the electrical compartment 30, thereby improving the space utilization of the energy storage device 1, which is conducive to increasing the volume of the battery device 10 that the battery compartment 40 can accommodate, thereby improving the energy density and performance of the energy storage device 1.

[0121] In some implementations, such as Figure 5 As shown, the electrical compartment 30 also includes a junction box 340. The main power distribution control box 330 and the junction box 340 are arranged along the direction of gravity. The junction box 340 is used to combine the output current of the battery device 10.

[0122] It should be understood that the combiner box 340 can be used to combine the current output from the battery clusters in the battery compartment 40 and output it through the load. The combiner box 340 may include a combiner component that can be electrically connected to the main control box. For example, the high-voltage line from the main control box can be connected to the combiner component through a cable tray. That is, the current from the parallel connection of the battery clusters inside the energy storage device 1 can be output to the external load through the combiner component. The combiner box 340 may also be equipped with an isolating switch, which is located between the combiner component and the external load to facilitate power disconnection during maintenance of the combiner box 340, thereby improving the safety performance of the combiner box 340.

[0123] In this embodiment of the application, by setting a combiner box 340 in the electrical compartment 30, and arranging the power distribution main control box 330 and the combiner box 340 along the direction of gravity, that is, accommodating the busbar that is electrically connected to the battery device 10 in the combiner box 340, the space utilization and integration of the electrical compartment 30 are further improved, thereby improving the space utilization of the energy storage device 1, which is conducive to increasing the volume of the battery device 10 that the battery compartment 40 can accommodate, thereby improving the energy density and performance of the energy storage device 1.

[0124] According to some embodiments of this application, this application also provides an energy storage system, including the energy storage device 1 in any of the above embodiments.

[0125] According to some embodiments of this application, see Figure 1 , Figure 5 and Figure 6This application provides an energy storage device 1, which includes an electrical compartment 30 and a battery compartment 40 arranged along a first direction. The battery compartment 40 is used to house a battery device 10, and the electrical compartment 30 is used to house a fire-fighting device 310, a dehumidifier 320, and a power distribution main control box 330. The interior of the power distribution main control box 330 is used to house a power distribution box and a main control box. The energy storage device 1 includes an adjacent first wall 510 and a second wall 520. A first opening 301 of the electrical compartment 30 faces the first wall 510, and the first wall 510 has a door 511 for covering the first opening 301. The dehumidifier 320 is disposed on the side of the door 511 facing the electrical compartment 30, and the fire-fighting device 310 is disposed on the side of the electrical compartment 30 near the second wall 520. The fire-fighting device 310 includes a fire-fighting gas cylinder 311, which is fixedly connected to the second wall 520. The electrical compartment 30 also includes a connecting component 60, which is fixedly connected to the second wall 520. The connecting component 60 is used to limit the displacement of the fire-fighting gas cylinder 311 in a plane perpendicular to the direction of gravity. The connecting component 60 includes a first connecting component 610 and a second connecting component 620. The first connecting component 610, the second connecting component 620 and the second wall 520 form a receiving cavity 70 for accommodating part of the fire-fighting gas cylinder 311. The first end 611 of the first connecting component 610 facing the second wall 520 is bolted to the second wall 520. The second end 621 of the second connecting component 620 facing the second wall 520 is bolted to the second wall 520. The third end 612 of the first connecting component 610 away from the second wall 520 and the fourth end 622 of the second connecting component 620 away from the second wall 520 are bolted together.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: An electrical compartment (30) and a battery compartment (40) are arranged along a first direction. The battery compartment (40) is used to house a battery device (10). The electrical compartment (30) is used to house a fire-fighting device (310), a dehumidifying device (320), and a power distribution main control box (330). The interior of the power distribution main control box (330) is used to house a power distribution box and a main control box. The energy storage device includes an adjacent first wall (510) and a second wall (520). The first opening (301) of the electrical compartment (30) faces the first wall (510). The first wall (510) has a door (511) for covering the first opening (301). The dehumidification device (320) is located on the side of the door (511) facing the electrical compartment (30). The fire-fighting device (310) is located on the side of the electrical compartment (30) near the second wall (520).

2. The energy storage device according to claim 1, characterized in that, The fire-fighting device (310) includes a fire-fighting gas cylinder (311), which is fixedly connected to the second wall (520).

3. The energy storage device according to claim 2, characterized in that, The electrical compartment (30) also includes a connecting component (60), which is fixedly connected to the second wall (520). The connecting component (60) is used to limit the displacement of the fire-fighting gas cylinder (311) in a plane perpendicular to the direction of gravity. The connecting component (60) includes a first connecting component (610) and a second connecting component (620). The first connecting component (610), the second connecting component (620), and the second wall (520) form a receiving cavity (70) for accommodating part of the fire-fighting gas cylinder (311). The first end (611) of the first connecting component (610) facing the second wall (520) is fixedly connected to the second wall (520). The second end (621) of the second connecting component (620) facing the second wall (520) is fixedly connected to the second wall (520). The third end (612) of the first connecting component (610) away from the second wall (520) is fixedly connected to the fourth end (622) of the second connecting component (620) away from the second wall (520).

4. The energy storage device according to claim 3, characterized in that, The first end (611) and the second end (621) are bolted to the second wall (520) respectively, and the third end (612) is bolted to the fourth end (622).

5. The energy storage device according to claim 3, characterized in that, The electrical compartment (30) further includes a first limiting component (810), which is housed in the receiving cavity (70) and located between the second wall (520) and the fire cylinder (311). The first limiting component (810) is used to limit the rotation of the fire cylinder (311) in a plane perpendicular to the direction of gravity.

6. The energy storage device according to claim 5, characterized in that, The first surface (811) of the first limiting member (810) facing the fire cylinder (311) is a plane.

7. The energy storage device according to any one of claims 2 to 6, characterized in that, The electrical compartment (30) further includes a second limiting component (820), and a groove structure (90) is formed between the second limiting component (820) and the bottom wall (350) of the electrical compartment (30). The portion of the fire-fighting gas cylinder (311) facing the bottom wall (350) is accommodated in the groove structure (90), and the groove structure (90) is used to limit the displacement of the fire-fighting gas cylinder (311) in a plane perpendicular to the direction of gravity.

8. The energy storage device according to any one of claims 2 to 6, characterized in that, The fire-fighting device (310) also includes a fire-fighting pipeline (312) for containing fire-fighting media, and at least a portion of the orthographic projection of the fire-fighting gas cylinder (311) overlaps with at least a portion of the orthographic projection of the fire-fighting pipeline (312) on a plane perpendicular to the first direction.

9. The energy storage device according to any one of claims 2 to 6, characterized in that, The electrical compartment (30) also includes a junction box (340). The main control box (330) and the junction box (340) are arranged along the direction of gravity. The junction box (340) is used to combine the output current of the battery device (10).

10. An energy storage system, characterized in that, include: Multiple energy storage devices according to any one of claims 1 to 9.

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