Energy storage apparatus, energy storage system and charging network

Abstract

Provided in the present application are an energy storage apparatus, an energy storage system and a charging network. The energy storage apparatus comprises a battery apparatus and a fire-fighting piping system. The battery apparatus comprises a case and battery cells, wherein the battery cells are accommodated in the case. The fire-fighting piping system is used for discharging emissions from the interior of the case, and comprises a main pipe and branch pipes, wherein the branch pipes are connected to the case and are in communication with the main pipe. The fire-fighting piping system further comprises a collection component, wherein the collection component is in communication with the main pipe, and the collection component is configured to collect at least some of condensing media in the emissions in the main pipe. Such an energy storage apparatus reduces the risk of the internal pressure of the fire-fighting piping system and the internal pressure of the case increasing as a result of a blockage in the fire-fighting piping system. Moreover, since the emissions are discharged from the case, the impact of the emissions on the battery cells in the case is reduced, thus reducing the risk of combustion and explosion of the battery cells in the case and the risk of thermal propagation occurring in other battery cells, and consequently improving the reliability of the energy storage apparatus.

Description

Energy storage devices, energy storage systems and charging networks

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510302854.3, filed on March 14, 2025, entitled “Energy Storage Device, Energy Storage System and Charging Network”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and more specifically, to an energy storage device, an energy storage system, and a charging network. Background Technology

[0004] With the rapid development of technology, electricity has become an indispensable energy source in people's production and daily life. To improve the smoothness of electricity supply and ensure the normal operation of production and daily life, energy storage devices are needed. As devices that cyclically store and release electrical energy, energy storage devices store electrical energy or supply the stored energy to electrical devices through charging or discharging. Energy storage devices are widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations.

[0005] In the development of energy storage devices, in addition to improving their performance, enhancing their reliability is also a crucial issue. Therefore, improving the reliability of energy storage devices is a continuous technical challenge in energy storage technology. Summary of the Invention

[0006] This application provides an energy storage device, an energy storage system, and a charging network, which can improve the reliability of the energy storage device.

[0007] In a first aspect, embodiments of this application provide an energy storage device, including a battery device and a fire-fighting piping system; the battery device includes a housing and battery cells, with the battery cells housed within the housing; the fire-fighting piping system is used to discharge emissions from the housing, and includes a main pipe and branch pipes, with the branch pipes connected to the housing and communicating with the main pipe; wherein the fire-fighting piping system further includes a collection component, which is communicated with the main pipe and configured to collect at least a portion of the condensate in the emissions from the main pipe.

[0008] In the above technical solution, by setting a branch pipe connected to the housing and communicating with the main pipe, the emissions inside the housing can enter the main pipe through the branch pipe and be discharged. By setting a collection component connected to the main pipe, the collection component can collect the condensate in the main pipe, reducing the risk of blockage in the fire protection piping system. On the one hand, this reduces the risk of increased internal pressure in the fire protection piping system and the housing due to blockage, thereby reducing the risk of damage to the fire protection piping system and the housing. On the other hand, the emissions are discharged from the housing, reducing the impact of the emissions on the individual battery cells inside the housing, thereby reducing the risk of explosion of individual battery cells and the risk of thermal diffusion from other battery cells, and improving the reliability of the energy storage device.

[0009] In some embodiments, the main pipe includes a first pipe section having a first end and a second end opposite to each other, the second end being positioned higher than the first end. A collecting component is connected to the first end, and the direction from the first end to the second end is the flow direction of the discharge within the first pipe section. By setting the second end of the first pipe section higher than the first end, the first pipe can guide the condensate inside it to the first end for easy collection by the collecting component, reducing the difficulty of collecting the condensate and lowering the risk of the main pipe becoming clogged.

[0010] In some embodiments, the first pipe section extends along the height of the energy storage device. This makes it easier for the condensate in the first pipe section to flow into the collection component, further reducing the risk of the main pipe becoming blocked.

[0011] In some embodiments, the first pipe section, the collecting component, and the branch pipe are connected by a first tee pipe. This reduces the installation difficulty of the first pipe section, the collecting component, and the branch pipe, and lowers the setup cost of the collecting section.

[0012] In some embodiments, the energy storage device includes multiple battery units arranged along the height of the energy storage device. The housing of each battery unit is connected to a main pipe via a branch pipe. The main pipe includes multiple pipe segments arranged along the height of the energy storage device, with at least one end of each segment connected to a branch pipe. The lowest segment in the main pipe is the first pipe segment. In this way, emissions from each battery unit can be introduced into the main pipe through the branch pipe, and condensate in the main pipe can flow into the lowest segment and then into a collection component through the first end of the first pipe, thereby collecting the condensate, reducing the risk of blockage in the main pipe, and improving the reliability of the energy storage device.

[0013] In some embodiments, along the height direction of the energy storage device, two adjacent pipe sections and branch pipes are connected by a second tee pipe. This makes the connection between pipe sections and branch pipes more convenient and reduces the installation difficulty of pipe sections and branch pipes.

[0014] In some embodiments, the energy storage device includes multiple battery units arranged along the height of the energy storage device. The housing of each battery unit is connected to the main pipe via a branch pipe. Along the height of the energy storage device, a collection component is connected to the bottom end of the main pipe. In this way, with the collection component located at the bottom end of the main pipe, the condensate in the main pipe can flow into the collection component for collection, reducing the difficulty of collecting the condensate.

[0015] In some embodiments, the main pipe extends along the height direction of the energy storage device. By setting the main pipe to extend along the height direction of the energy storage device, it is beneficial for the condensate medium in the main pipe to flow towards the collection component along the height direction, thereby improving the collection efficiency of the collection component.

[0016] In some embodiments, the collecting component has a containment space for containing condensate, and the collecting component is provided with a discharge port communicating with the containment space; the fire-fighting piping system also includes a sealing element that detachably seals the discharge port. Thus, when the sealing element is removed from the discharge port, the condensate within the collecting component can be discharged through the discharge port, facilitating the reuse of the collecting component; when the sealing element seals the discharge port, the condensate within the containment space is less likely to flow out of the discharge port, reducing the risk of condensate flowing out of the discharge port and contaminating the energy storage device.

[0017] In some embodiments, along the height direction of the energy storage device, a collecting component is connected to the bottom end of the main pipe, and a discharge port is located at the bottom end of the collecting component. This allows the discharge port to discharge more condensate from the containment space when discharging condensate, thus improving the discharge efficiency.

[0018] In some embodiments, the collecting component includes a collecting pipe connected to the bottom end of the main pipe, the collecting pipe extending along the extension direction of the main pipe, and a discharge port located at the bottom end of the collecting pipe. Thus, both the collecting component and the main pipe are tubular components, which facilitates their assembly and makes the processing of the collecting component easier, thereby reducing its manufacturing cost.

[0019] In some embodiments, the sealing element is threadedly connected to the collecting element. This makes the connection between the sealing element and the collecting element easier and reduces the assembly difficulty of the sealing element and the collecting element.

[0020] In some embodiments, the battery device further includes a first pressure relief mechanism disposed in the housing; the fire-fighting piping system further includes a vent hood connected to the housing and covering the first pressure relief mechanism, and a branch pipe connected to the vent hood and connecting the vent hood and the main pipe. By providing the first pressure relief mechanism, the vent hood can collect the emissions discharged from the housing by the first pressure relief mechanism and guide them to the main pipe through the branch pipe.

[0021] In some embodiments, the battery device includes a battery compartment and a gas collection compartment, which are connected. The battery compartment is used to house individual battery cells. A first pressure relief mechanism is disposed on the wall of the gas collection compartment, and a gas collection hood is connected to the wall of the compartment. By disposing of the first pressure relief mechanism on the wall of the gas collection compartment, the impact of the first pressure relief mechanism on the strength of the battery compartment can be reduced, thereby improving the battery compartment's ability to protect the individual battery cells and reducing the risk of damage to the battery compartment.

[0022] In some embodiments, the chamber wall is the top wall of the gas collection chamber. In this way, the emissions in the gas collection chamber can be discharged from the top of the gas collection chamber, reducing the risk of emissions entering the branch pipe, accumulating inside the branch pipe, and clogging the branch pipe.

[0023] In some embodiments, the branch pipe is provided with a one-way valve, which is configured to allow emissions from the housing to enter the main pipe through the branch pipe. This reduces the risk of emissions flowing back into the housing after entering the branch pipe, thus lowering the risk of emissions contaminating the individual battery cells inside the housing.

[0024] In some embodiments, the inner diameter of the main pipe is 2mm-20mm. When the inner diameter of the main pipe is greater than or equal to 2mm, the flow rate of the main pipe can be increased, and the risk of the main pipe being blocked can be reduced. When the inner diameter of the main pipe is less than or equal to 20mm, the space occupied by the main pipe can be reduced, thereby allowing the energy storage device to have more space to accommodate the battery device and increasing the volumetric energy density of the energy storage device. Therefore, when the inner diameter of the main pipe is 2mm-20mm, the flow rate of the main pipe and the dedicated space of the main pipe can be balanced, reducing the risk of the main pipe being blocked and increasing the volumetric energy density of the energy storage device.

[0025] In some embodiments, the inner diameter of the branch pipe is 2mm-20mm. When the inner diameter of the branch pipe is greater than or equal to 2mm, the flow rate of the branch pipe can be increased, and the risk of the branch pipe being blocked can be reduced. When the inner diameter of the branch pipe is less than or equal to 20mm, the space occupied by the branch pipe can be reduced, thereby allowing the energy storage device to have more space to accommodate the battery device and increasing the volumetric energy density of the energy storage device. Therefore, when the inner diameter of the branch pipe is 2mm-20mm, the flow rate of the branch pipe and the dedicated space of the branch pipe can be balanced, reducing the risk of the branch pipe being blocked and increasing the volumetric energy density of the energy storage device.

[0026] In some embodiments, the inner diameter of the main pipe is 2mm-20mm; the inner diameter of the branch pipe is 2mm-20mm. This balances the flow rate and space occupied by the main and branch pipes, reduces the risk of blockage in the fire protection piping system, and increases the volumetric energy density of the energy storage device.

[0027] Secondly, embodiments of this application provide an energy storage system, including a power conversion device and an energy storage device provided in any of the embodiments of the first aspect, wherein the power conversion device is used to electrically connect a power generation device and an energy storage device.

[0028] Thirdly, embodiments of this application provide a charging network, including a charging pile and an energy storage device provided in any of the embodiments of the first aspect, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 is a schematic diagram of the structure of a charging network provided in some embodiments of this application;

[0031] Figure 2 is a schematic diagram of the energy storage system provided in some embodiments of this application;

[0032] Figure 3 is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application;

[0033] Figure 4 is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0034] Figure 5 is an exploded view of a single battery cell provided in some embodiments of this application;

[0035] Figure 6 is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application;

[0036] Figure 7 is an assembly diagram of the battery device and fire-fighting piping system provided in some embodiments of this application;

[0037] Figure 8 is a magnified view of region A in Figure 7;

[0038] Figure 9 is a structural schematic diagram of a fire-fighting piping system provided in some embodiments of this application;

[0039] Figure 10 is a magnified view of region B in Figure 7;

[0040] Figure 11 is a schematic diagram of the assembly of the battery device and the branch pipe provided in some embodiments of this application.

[0041] Icons: 1-Battery cell; 11-Casing; 111-Shell; 1111-Opening; 112-End cap; 12-Electrode assembly; 13-Electrode terminal; 2-Box; 21-First box; 22-Second box; 3-First pressure relief mechanism; 4-Battery compartment; 5-Gas collection compartment; 10-Battery assembly; 10a-Battery cluster;

[0042] 20-Fire protection piping system; 201-Main pipe; 201a-Pipe section; 2011-First pipe section; 20111-First end; 20112-Second end; 202-Branch pipe; 203-Collection component; 2031-Discharge outlet; 204-First tee pipe; 205-Second tee pipe; 206-Main pipe; 207-Sealing component; 208-Gas hood; 209-Check valve; 30-Cabinet;

[0043] 100 - Energy storage device; 200 - Charging pile; 300 - Power conversion device; 1000 - Energy storage system; 2000 - Charging network; 3000 - Power generation device; X - Length direction of energy storage device; Z - Height direction of energy storage device. Embodiments of the present invention

[0044] 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.

[0045] 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.

[0046] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0047] 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.

[0048] 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.

[0049] In this application, "multiple" means two or more (including two).

[0050] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0051] The battery mentioned in the embodiments of this application may be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar.

[0052] A single battery cell typically includes an electrode assembly. The electrode assembly comprises a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0053] Optionally, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0054] Optionally, the electrode assembly has a stacked structure.

[0055] Optionally, the electrode assembly can be cylindrical, flat, or polygonal in shape.

[0056] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0057] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging multiple battery cells and fixing them together to form an independent module.

[0058] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0059] In some embodiments, the battery device may be a battery pack, which may include a housing and one or more individual battery cells housed within the housing.

[0060] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0061] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0062] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0063] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0064] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0065] In some embodiments, energy storage devices may generally include energy storage containers, energy storage cabinets, etc.

[0066] Energy storage devices may include battery units, which consist of a housing and multiple individual battery cells housed within it. During operation, the individual battery cells within the housing are at risk of thermal runaway. In the event of thermal runaway in an individual battery cell, it ejects a large amount of high-temperature emissions into the housing, containing various flammable materials. To mitigate the impact of these emissions on other battery cells and to improve the overall reliability of the energy storage device, a fire suppression system can be installed within the housing. This system can be connected to the housing. In the event of thermal runaway in a battery cell, the fire suppression system can promptly expel the high-temperature emissions. This relieves pressure within the housing, reducing the risk of damage, and minimizes contact between the emissions and other battery cells, further reducing the risk of thermal runaway in those cells. However, since most of the emissions are high-temperature substances, including a large number of substances that vaporize under high temperatures, such as electrolytes, these vaporized substances are prone to condensation in the fire protection piping system during the discharge process. This condensation can easily accumulate in the fire protection piping system, causing blockages and preventing emissions from being discharged from the enclosure. This can damage the enclosure and the fire protection piping system, increase the risk of thermal runaway of the battery cells inside the enclosure, and reduce the reliability of the energy storage device.

[0067] In view of this, to reduce the risk of blockage in the fire protection piping system, this application provides an energy storage device, including a battery device and a fire protection piping system. The battery device includes a housing and individual battery cells, with the individual battery cells housed within the housing. The fire protection piping system is used to discharge emissions from the housing, and includes a main pipe and branch pipes, with the branch pipes connected to the housing and communicating with the main pipe. The fire protection piping system also includes a collection component, which is connected to the main pipe and configured to collect at least a portion of the condensate in the emissions from the main pipe.

[0068] In such an energy storage device, branch pipes are connected to the tank and then to the main pipe, allowing emissions from inside the tank to be discharged through the branch pipes into the main pipe. A collection component connected to the main pipe collects condensate within the main pipe, reducing the risk of blockage in the fire protection piping system. This reduces the risk of increased internal pressure in the fire protection piping system and the tank due to blockage, thus mitigating the risk of damage to both. Furthermore, the discharge of emissions from the tank reduces their impact on the individual battery cells, thereby reducing the risk of thermal runaway and improving the reliability of the energy storage device.

[0069] 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 power stations can store electrical energy during off-peak hours and provide power to users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electricity, and then store it in energy storage devices. Solar power generation systems can convert solar energy into electricity, store it in energy storage devices, and supply it to users as needed. Mobile power systems can supply power to electrical equipment in areas inaccessible by the mains grid, such as remote mountainous areas and isolated wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power supply. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0070] Please refer to Figure 1, which is a schematic diagram of the structure of a charging network 2000 provided in some embodiments of this application. This application provides a charging network 2000, which includes a charging pile 200 for charging electrical equipment. The charging network 2000 may also include an energy storage device 100, which is electrically connected to the charging pile 200 and provides electrical energy to the charging pile 200.

[0071] It should be noted that the charging pile 200 is electrically connected to the battery cell 1 in the energy storage device 100 via a cable. The battery cell 1 can supply its stored electrical energy to the charging pile 200. The charging pile 200 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's energy. The application of the energy storage device 100 in this charging network 2000 can effectively improve the reliability of the charging network 2000 and also help to improve the flexibility of the charging network 2000 during deployment.

[0072] In a charging network 2000, there can be one charging pile 200, and the energy storage device 100 provides power to the charging pile 200; there can also be multiple charging piles 200, and the energy storage device 100 provides power to multiple charging piles 200.

[0073] The energy storage device 100 may include a container, which includes a cabinet 30 and a battery device 10 housed within the cabinet 30. The battery device 10 includes a housing 2 and a battery cell 1. The battery cell 1 is electrically connected to the charging pile 200 so that the battery cell 1 can provide power to the charging pile 200.

[0074] As an example, as shown in Figure 1, the charging network 2000 includes an energy storage device 100 and two charging piles 200, with the energy storage device 100 providing power to the two charging piles 200.

[0075] Please refer to Figure 2, which is a schematic diagram of the structure of an energy storage system 1000 provided in some embodiments of this application. This application provides an energy storage system 1000. The energy storage system 1000 includes a power conversion device 300, which can be electrically connected to a power generation device 3000 to convert the electrical power provided by the power generation device 3000. The energy storage system 1000 may also include an energy storage device 100, which is electrically connected to the power conversion device 300. The power conversion device 300 converts the electrical energy provided by the power generation device 3000 and stores it in the energy storage device 100.

[0076] A power conversion device is used to connect the power generation device 3000 and the energy storage device 100. The power generation device 3000 generates electrical energy and stores the generated electrical energy in the energy storage device 100 via the power conversion device. The use of the energy storage device 100 in the energy storage system 1000 effectively improves the operational reliability of the energy storage system 1000. In specific implementations, the power generation equipment can be solar panels, hydroelectric power generation equipment, thermal power generation equipment, etc. This application does not limit the specific type of power generation equipment.

[0077] As an example, as shown in Figure 2, the energy storage system 1000 includes an energy storage device 100 and a power conversion device 300. The two power generation devices 3000 respectively transmit the generated electrical energy to the power conversion device 300, and the power conversion device 300 imports the electrical energy into the energy storage device 100 for storage.

[0078] Please refer to Figures 3 and 4. Figure 3 is a structural schematic diagram of an energy storage device 100 provided in some embodiments of this application; Figure 4 is a structural schematic diagram of a battery device 10 provided in some embodiments of this application. This application provides an energy storage device 100, which includes a cabinet 30 and a battery device 10, with the battery device 10 housed within the cabinet 30. The battery device 10 may include a housing 2 and individual battery cells 1, with the housing 2 accommodating the individual battery cells 1.

[0079] The housing 2 has an enclosed space inside for accommodating the battery cell 1. The housing 2 can have various structures. In some embodiments, the housing 2 may include a first housing 21 and a second housing 22, which are interlocked. The first housing 21 and the second housing 22 can have various shapes, such as cuboids or cylinders. The first housing 21 can be a hollow structure open on one side, and the second housing 22 can also be a hollow structure open on one side. The open side of the second housing 22 interlocks with the open side of the first housing 21, thus forming a housing 2 with an enclosed space. Alternatively, the first housing 21 can be a hollow structure open on one side, and the second housing 22 can be a plate-like structure, with the second housing 22 interlocked with the open side of the first housing 21, thus forming a housing 2 with an accommodating space.

[0080] In the battery device 10, there can be one or more battery cells 1. If there are multiple battery cells 1, they can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 1 are connected in both series and parallel. Alternatively, multiple battery cells 1 can be first connected in series, parallel, or in a mixed manner to form a battery module, and then the multiple battery modules can be connected in series, parallel, or in a mixed manner to form a whole, which is then housed in the housing 2. Another option is that all battery cells 1 can be directly connected in series, parallel, or in a mixed manner, and then the whole consisting of all battery cells 1 is housed in the housing 2.

[0081] In some embodiments, the battery device 10 may further include a busbar (not shown in the figure), through which multiple battery cells 1 can be electrically connected to each other to achieve series, parallel, or mixed connection of multiple battery cells 1. The busbar can be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0082] Please refer to Figure 5, which is an exploded view of a battery cell 1 provided in some embodiments of this application. The battery cell 1 may include a housing 11 and an electrode assembly 12, the electrode assembly 12 being housed within the housing 11.

[0083] In some embodiments, the housing 11 may include a housing 111 and an end cap 112, the housing 111 having an opening 1111, and the end cap 112 closing the opening 1111 of the housing 111. Here, "closed" means covered or shut, and can be either sealed or unsealed.

[0084] The housing 111 is a component used to house the electrode assembly 12. The housing 111 can be a hollow structure with an opening 1111 at one end, or it can be a hollow structure with openings 1111 at both opposite ends. The housing 111 can have various shapes, such as cylindrical or cuboid. The housing 111 can be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy. The electrode assembly 12 can be partially or completely located within the housing 111.

[0085] End cap 112 and housing 111 together define a receiving space for accommodating electrode assembly 12 and other components. End cap 112 can be connected to housing 111 by welding, rolling, or other methods to close the opening 1111 of housing 111. The shape of end cap 112 can be adapted to the shape of housing 111. For example, if housing 111 is a cuboid structure, end cap 112 can be a rectangular plate structure adapted to housing 111; or if housing 111 is a cylindrical structure, end cap 112 can be a circular plate structure adapted to housing 111. The material of end cap 112 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The materials of end cap 112 and housing 111 can be the same or different.

[0086] In an embodiment where the housing 111 has an opening 1111 at one end, one end cap 112 may be provided accordingly. In an embodiment where the housing 111 has openings 1111 at both opposite ends, two end caps 112 may be provided accordingly. The two end caps 112 respectively close the two openings 1111 of the housing 111, and the two end caps 112 and the housing 111 together define the receiving space.

[0087] In some embodiments, the battery cell 1 may further include an electrode terminal 13 disposed on the housing 11. The electrode terminal 13 is used for electrical connection with the tab of the electrode assembly 12 to input or output electrical energy of the battery cell 1. The electrode terminal 13 may be disposed on the housing 111 of the housing 11 or on the end cap 112 of the housing 11. The electrode terminal 13 and the tab may be directly connected, for example, by welding the electrode terminal 13 to the tab. The electrode terminal 13 and the tab may also be indirectly connected, for example, by connecting the electrode terminal 13 to the tab indirectly through a current collector. The current collector may be a metallic conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0088] As an example, as shown in Figure 5, one end of the housing 111 forms an opening 1111, and there is one end cap 112 in the housing 11, which closes one opening 1111 of the housing 111. Two electrode terminals 13 are provided on the end cap 112, which are a positive electrode terminal and a negative electrode terminal, respectively. The end of the electrode assembly 12 facing the end cap 112 has a positive electrode tab and a negative electrode tab, and the positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0089] In some embodiments, the battery cell 1 further includes a second pressure relief mechanism (not shown in the figure). The second pressure relief mechanism is disposed on the housing 11 and releases the pressure inside the battery cell 1 when the pressure inside the battery cell 1 reaches a threshold.

[0090] Please refer to Figures 6 and 7. Figure 6 is a structural schematic diagram of an energy storage device 100 provided in some embodiments of this application; Figure 7 is an assembly diagram of a battery device 10 and a fire-fighting piping system 20 provided in some embodiments of this application. This application provides an energy storage device 100, including a battery device 10 and a fire-fighting piping system 20. The battery device 10 includes a housing 2 and battery cells 1, with the battery cells 1 housed within the housing 2. The fire-fighting piping system 20 is used to discharge emissions from the housing 2. The fire-fighting piping system 20 includes a main pipe 201 and branch pipes 202, with the branch pipes 202 connected to the housing 2 and communicating with the main pipe 201. The fire-fighting piping system 20 also includes a collection component 203, which communicates with the main pipe 201 and is configured to collect at least a portion of the condensate in the emissions from the main pipe 201.

[0091] The energy storage device 100 may include only one battery device 10 or multiple battery devices 10. The housing 2 may contain one or multiple battery cells 1.

[0092] The fire-fighting piping system 20 is capable of discharging emissions from the battery device 10. The main pipe 201 of the fire-fighting piping system 20 is connected to branch pipes 202. In an embodiment where there is only one battery device 10, the branch pipes 202 connect the battery device 10 and the main pipe 201, guiding the emissions from the battery device 10 into the main pipe 201 and discharging them out of the main pipe 201. In embodiments where there are multiple battery devices 10, each branch pipe 202 may be connected to one main pipe 201 and one housing 2; alternatively, multiple branch pipes 202 may be connected to the same main pipe 201, and each branch pipe 202 may be connected to one housing 2. When the housing 2 releases emissions, the emissions are guided through the branch pipes 202 into the same main pipe 201 and then discharged out of the main pipe 201. The emissions may include hydrogen, carbon monoxide, methane, acetylene, hydrogen fluoride, acetone, vinyl hydrochloride, dimethyl carbonate, diethyl carbonate, or methyl ethyl carbonate. Some of the emissions can condense to form condensate during the emission process, such as vinyl hydrochloride, dimethyl carbonate, diethyl carbonate, and methyl ethyl carbonate.

[0093] The collecting component 203 can collect the condensate in the discharge from the main pipe 201. The collecting component 203 may collect all the condensate in the discharge from the main pipe 201, or it may collect only a portion of the condensate. The main pipe 201 may only be connected to one collecting component 203, for example, the collecting component 203 may be located at the bottom of the main pipe 201, allowing all the condensate in the main pipe 201 to flow to the collecting component 203; alternatively, the main pipe 201 may be connected to multiple collecting components 203, for example, the fire management system may have a connecting part for connecting the main pipe 201 and the branch pipe 202, and the connecting part may also be connected to a collecting component 203 located below the connecting part to collect the condensate flowing back from the main pipe 201 to the branch pipe 202.

[0094] In an embodiment where the energy storage device 100 includes a cabinet 30, the branch pipe 202 is located inside the cabinet 30. This could be either a portion of the main pipe 201 located inside the cabinet 30 or the entire main pipe 201 located inside the cabinet 30.

[0095] In this embodiment, by setting a branch pipe 202 connected to the housing 2 and communicating with the main pipe 201, the discharge from the housing 2 can enter the main pipe 201 through the branch pipe 202 and be discharged. By setting a collecting component 203 communicating with the main pipe 201, the collecting component 203 can collect the condensate in the main pipe 201, thereby clearing the main pipe 201 and facilitating the discharge of the discharge from the fire-fighting pipeline system 20. On the one hand, this reduces the risk of increased internal pressure in the fire-fighting pipeline system 20 and the housing 2 due to blockage, thereby reducing the risk of damage to the fire-fighting pipeline system 20 and the housing 2. On the other hand, the discharge from the housing 2 reduces the impact of the discharge on the battery cells 1 inside the housing 2, thereby reducing the risk of explosion of the battery cells 1 inside the housing 2 and the risk of thermal diffusion of other battery cells 1, and improving the reliability of the energy storage device 100.

[0096] Please refer to Figures 6-8, where Figure 8 is a partial enlarged view of region A in Figure 7. In some embodiments, the main pipe 201 includes a first pipe section 2011, which has a first end 20111 and a second end 20112 opposite to each other. The second end 20112 is positioned higher than the first end 20111. A collecting component 203 is connected to the first end 20111, and the direction from the first end 20111 to the second end 20112 is the flow direction of the discharge within the first pipe section 2011.

[0097] The second end 20112 of the first pipe section 2011 is positioned higher than the first end 20111, allowing the condensate to flow within the first pipe section 2011 in a direction from the second end 20112 towards the first end 20111. The first pipe can be a straight pipe, or the first pipe section 2011 can extend along its height; alternatively, the extension direction of the first pipe section 2011 can be inclined to the height direction. The first pipe section 2011 can also be a bend, with the second end 20112 higher than the first end 20111.

[0098] In this embodiment, by setting the second end 20112 of the first pipe section 2011 to be higher than the first end 20111, the first pipe can guide the condensate inside to the first end 20111 so that the collecting component 203 can collect it, thereby reducing the difficulty of the collecting component 203 in collecting the condensate and reducing the risk of the main pipe 201 being blocked.

[0099] In some embodiments, please continue to refer to Figures 6-8. The first pipe segment 2011 extends along the height direction Z of the energy storage device.

[0100] The height direction Z of the energy storage device refers to the vertical direction of the energy storage device 100 when it is in a normal placement state or connected to the charging network 2000 or the energy storage system 1000.

[0101] The first pipe section 2011 extends along the height direction Z of the energy storage device, so that the condensate in the first pipe section 2011 can slide down along the height direction Z of the energy storage device into the collection component 203.

[0102] In this embodiment, by setting the first pipe section 2011 to extend along the height direction Z of the energy storage device, the condensate in the first pipe section 2011 can more easily flow into the collection component 203, further reducing the risk of the main pipe 201 being blocked.

[0103] In some embodiments, please continue to refer to Figure 8. The first pipe section 2011, the collecting component 203, and the branch pipe 202 are connected by a first tee pipe 204.

[0104] The first tee pipe 204 has three first connection ports, which are interconnected. The first pipe section 2011, the collecting component 203, and the branch pipe 202 are each connected to one of the first connection ports. The first connection port connecting the collecting component 203 is the lowest of the three first connection ports. Specifically, the first end 20111 of the first pipe section 2011 is connected to one of the first connection ports.

[0105] The first pipe section 2011, the collecting component 203, and the branch pipe 202 can all be connected to the first tee pipe 204 by insertion, threading, or bonding.

[0106] In this embodiment, by connecting the first pipe section 2011, the collecting component 203, and the branch pipe 202 through the first tee pipe 204, the installation difficulty of the first pipe section 2011, the collecting component 203, and the branch pipe 202 is reduced, and the installation cost of the collecting part is reduced.

[0107] In some embodiments, please continue to refer to Figure 7. The energy storage device 100 includes a plurality of battery devices 10, which are arranged along the height direction Z of the energy storage device. The housing 2 of each battery device 10 is connected to the main pipe 201 via a branch pipe 202. The main pipe 201 includes a plurality of pipe segments 201a, which are arranged along the height direction Z of the energy storage device. At least one end of each pipe segment 201a is connected to the branch pipe 202. The lowermost pipe segment 201a in the main pipe 201 is the first pipe segment 2011.

[0108] The number of battery devices 10 arranged along the height direction Z of the energy storage device can be two, three, four, five, six, seven, eight, nine, ten, twelve, fifteen, twenty, etc. Multiple battery devices 10 arranged along the height direction Z of the energy storage device form a battery cluster 10a. A battery cluster 10a is provided with a main pipe 201, and each battery device 10 in the battery cluster 10a is provided with a branch pipe 202. The multiple branch pipes 202 of the battery device 10 are all connected to a main pipe 201.

[0109] The main pipe 201 includes multiple pipe segments 201a. The bottom end of the uppermost pipe segment 201a is connected to the branch pipe 202 connecting the uppermost battery device 10. The lowermost pipe segment 201a is the first pipe segment 2011. The first end 20111 of the first pipe segment 2011 is connected to the branch pipe 202 connecting the lowermost battery device 10 and the collecting component 203. The two ends of the pipe segment 201a between the uppermost pipe segment 201a and the first pipe segment 2011 are connected to the two branch pipes 202 connecting the two adjacent battery devices 10.

[0110] In this embodiment, the emissions in each battery device 10 can be introduced into the main pipe 201 through the branch pipe 202. The condensate in the main pipe 201 can flow into the first pipe section 2011 located at the bottom and flow into the collection component 203 through the first end 20111 of the first pipe to achieve the collection of the condensate, reduce the risk of the main pipe 201 being blocked, and improve the reliability of the energy storage device 100.

[0111] In some embodiments, please refer to Figure 9, which is a structural schematic diagram of a fire-fighting piping system 20 provided in some embodiments of this application. Along the height direction Z of the energy storage device, two adjacent pipe sections 201a and branch pipes 202 are connected by a second tee pipe 205.

[0112] The second tee pipe 205 has three second connection ports, which are interconnected. Two adjacent pipe sections 201a and branch pipes 202 are respectively connected to one of the second connection ports. The discharge flows from the branch pipe 202 through the second tee pipe 205 to the main pipe 201. The condensate in the upper pipe section 201a of the main pipe 201 flows through the second tee pipe 205 to the lower pipe section 201a, until it flows into the collection component 203.

[0113] In this embodiment, the connection between pipe segment 201a and branch pipe 202 is more convenient, reducing the installation difficulty of pipe segment 201a and branch pipe 202.

[0114] In some embodiments, please continue to refer to Figures 7-9. The energy storage device 100 includes a plurality of battery devices 10, which are arranged along the height direction Z of the energy storage device. The housing 2 of each battery device 10 is connected to the main pipe 201 through a branch pipe 202. Along the height direction Z of the energy storage device, a collection component 203 is connected to the bottom end of the main pipe 201.

[0115] Multiple battery devices 10 are arranged in a battery cluster 10a along the height Z direction of the energy storage device. Each battery cluster 10a is equipped with a main pipe 201, and each battery device 10 in the battery cluster 10a is equipped with a branch pipe 202. The multiple branch pipes 202 of the battery devices 10 are all connected to the main pipe 201. The emissions from the battery devices 10 enter the main pipe 201 through the branch pipes 202, and the condensate in the emissions flows downward along the height Z direction of the energy storage device into the collection component 203 connected to the bottom of the main pipe 201.

[0116] In this embodiment, the collecting component 203 is located at the bottom of the main pipe 201, and the condensate in the main pipe 201 can flow into the collecting component 203 for collection, which reduces the difficulty of collecting the condensate in the collecting component 203.

[0117] In some embodiments, the main pipe 201 extends along the height direction Z of the energy storage device.

[0118] The extension direction of the main pipe 201 is parallel to the height direction Z of the energy storage device.

[0119] In this embodiment, by setting the main pipe 201 to extend along the height direction Z of the energy storage device, it is beneficial for the condensate in the main pipe 201 to flow to the collection component 203 along the height direction, thereby improving the collection efficiency of the collection component 203.

[0120] In some embodiments, please continue to refer to Figure 6. The energy storage device 100 includes a plurality of battery clusters 10a, which are arranged along the length direction X of the energy storage device, and the length direction X of the energy storage device is perpendicular to the height direction Z of the energy storage device. Each battery cluster 10a is provided with a main pipe 201 and a plurality of branch pipes 202, and each branch pipe 202 connects the main pipe 201 and a battery device 10 of the battery cluster 10a. The fire protection piping system 20 also includes a main pipe 206, which extends along the length direction X of the energy storage device and connects to the plurality of main pipes 201 to centrally discharge the emissions of the energy storage device 100 from the energy storage device 100.

[0121] In some embodiments, please refer to Figure 10, which is a partial enlarged view of region B in Figure 7. The collecting component 203 has a receiving space (not shown) for containing condensate, and the collecting component 203 is provided with a discharge port 2031 communicating with the receiving space. The fire hydrant system 20 also includes a sealing element 207, which removably seals the discharge port 2031.

[0122] The discharge port 2031 is used to discharge the condensate in the collection component 203. When the plug 207 is plugged into the discharge port 2031, the collection component 203 can store the condensate flowing into the collection component 203 from the main pipe 201; when the plug 207 is separated from the discharge port 2031, the condensate in the collection component 203 is discharged from the discharge port 2031.

[0123] In this embodiment, when the sealing member 207 is removed from the discharge port 2031, the condensate in the collection member 203 can be discharged through the discharge port 2031, so as to facilitate the reuse of the collection member 203; when the sealing member 207 blocks the discharge port 2031, the condensate in the containment space is less likely to flow out of the discharge port 2031, reducing the risk of the condensate flowing out of the discharge port 2031 and contaminating the energy storage device 100.

[0124] In some embodiments, along the height direction Z of the energy storage device, the collecting component 203 is connected to the bottom end of the main pipe 201, and the discharge port 2031 is disposed at the bottom end of the collecting component 203.

[0125] The collecting component 203 has two opposite ends along the height direction Z of the energy storage device. The top end of the collecting component 203 is connected to the bottom end of the main pipe 201, and the bottom end of the collecting component 203 is provided with a discharge port 2031.

[0126] In this embodiment, the discharge port 2031 can discharge more condensate from the containment space when discharging condensate, thereby improving the discharge efficiency of the discharge port 2031.

[0127] In some embodiments, the collecting component 203 includes a collecting tube connected to the bottom end of the main pipe 201, the collecting tube extending along the extending direction of the main pipe 201, and a discharge port 2031 disposed at the bottom end of the collecting tube.

[0128] The collecting component 203 includes a collecting tube, the interior of which serves as the housing space for the collecting component 203. The collecting tube extends in the same direction as the main tube 201.

[0129] In this embodiment, both the collecting component 203 and the main pipe 201 are pipe fittings, which facilitates the assembly of the collecting component 203 and the main pipe 201, and makes the processing of the collecting component 203 more convenient, thereby reducing the manufacturing cost of the collecting component 203.

[0130] In some embodiments, the sealing member 207 is threadedly connected to the collecting member 203.

[0131] The sealing component 207 may have an external thread, and the collecting component 203 may have an internal thread at the end furthest from the main pipe 201, with the external thread engaging with the internal thread. Alternatively, the sealing component 207 may have an internal thread, and the collecting component 203 may have an external thread at the end furthest from the main pipe 201, with the internal thread engaging with the external thread.

[0132] In this embodiment, the connection between the sealing component 207 and the collecting component 203 is more convenient, reducing the assembly difficulty of the sealing component 207 and the collecting component 203.

[0133] In some embodiments, please refer to Figure 11, which is a schematic diagram of the assembly of the battery device 10 and the branch pipe 202 provided in some embodiments of this application. The battery device 10 also includes a first pressure relief mechanism 3, which is disposed in the housing 2; the fire-fighting pipeline system 20 also includes a gas collection hood 208, which is connected to the housing 2 and covers the first pressure relief mechanism 3. The branch pipe 202 is connected to the gas collection hood 208 and connects the gas collection hood 208 and the main pipe 201.

[0134] The first pressure relief mechanism 3 is installed on the wall of the housing 2. When the internal pressure of the housing 2 reaches the threshold, the pressure inside the housing 2 is released through the first pressure relief mechanism 3.

[0135] The gas collection hood 208 is installed on the first pressure relief mechanism 3 to collect the emissions released from the box 2 when the pressure inside the box 2 is released by the first pressure relief mechanism 3.

[0136] In some embodiments, the battery device 10 includes a battery compartment 4 and a gas collection compartment 5, which are connected. The battery compartment 4 is used to accommodate a single battery cell 1. A first pressure relief mechanism 3 is disposed on the wall of the gas collection compartment 5, and the internal pressure of the battery device 10 is released through the first pressure relief mechanism 3 on the wall of the gas collection compartment 5.

[0137] The wall of the gas collection chamber 5 can be the top wall, the side wall, or the bottom wall of the gas collection chamber 5.

[0138] By placing the first pressure relief mechanism 3 on the wall of the gas collection chamber 5, the impact of the first pressure relief mechanism 3 on the strength of the battery compartment 4 can be reduced, thereby improving the protection capability of the battery compartment 4 for the battery cell 1 and reducing the risk of damage to the battery compartment 4.

[0139] In some embodiments, the chamber wall is the top wall of the gas collection chamber 5. In the embodiment shown in FIG11, a portion of the top wall of the gas collection chamber 5 separates the gas collection chamber 5 and the battery compartment 4, and another portion is the outer wall of the housing 2. The first pressure relief mechanism 3 is disposed in the portion of the top wall of the gas collection chamber 5 that is the outer wall of the housing 2. The emissions in the housing 2 include substances of various shapes and sizes. Discharging the emissions upward helps to reduce the risk of large particulate emissions accumulating in the branch pipe 202 and blocking the branch pipe 202, thereby improving the reliability of the battery device 10.

[0140] In some embodiments, the wall of the gas collection chamber 5 is provided with mounting holes, and the first pressure relief mechanism 3 blocks the mounting holes.

[0141] In some embodiments, the first pressure relief mechanism 3 may be a groove provided on the wall of the housing 2. When the internal pressure of the housing 2 reaches a threshold, the first pressure relief mechanism 3 may crack along the groove to release the pressure of the housing 2.

[0142] In this embodiment, by setting the first pressure relief mechanism 3, the gas collection hood 208 can collect the emissions discharged from the box 2 by the first pressure relief mechanism 3, and guide them to the main pipe 201 by the branch pipe 202.

[0143] In some embodiments, the first casing wall of the battery device 10 separates the battery storage compartment 4 and the gas collection compartment 5 inside the casing 2. The first casing wall has an exhaust port penetrating the battery compartment 4 and the gas collection compartment 5. The first casing wall supports the bottom wall of the battery cell 1. A second pressure relief mechanism is disposed on the bottom wall of the battery cell 1 and faces the exhaust port. When the internal pressure of the battery cell 1 increases, the battery cell 1 releases emissions through the second pressure relief mechanism to the exhaust port to reduce the internal pressure of the battery cell 1. As the emissions enter the gas collection compartment, increasing the internal pressure of the battery device 10, the battery device 10 releases the emissions through the first pressure relief mechanism 3 to reduce the internal pressure of the battery device 10.

[0144] In some embodiments, please continue to refer to Figure 11. Branch pipe 202 is provided with a one-way valve 209, which is configured to allow discharge from the housing 2 to enter the main pipe 201 through branch pipe 202.

[0145] The one-way valve 209 is configured to allow emissions to flow in the direction from the hood 208 toward the main pipe 201; and to restrict the flow of emissions in the direction from the main pipe 201 toward the hood 208 to prevent emissions from flowing back into the battery device 10.

[0146] In this embodiment, the emissions are less likely to flow back into the housing 2 after flowing into the branch pipe 202, which reduces the risk of emissions flowing back into the housing 2 and contaminating the battery cells 1 inside the housing 2.

[0147] In some embodiments, the inner diameter of the main tube 201 is 2mm-20mm.

[0148] The diameter of the main pipe 201 can be any one of the following values ​​or a range between any two: 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, and 20mm.

[0149] In this embodiment, when the inner diameter of the main pipe 201 is greater than or equal to 2 mm, the flow rate of the main pipe 201 can be increased, reducing the risk of the main pipe 201 being blocked. When the inner diameter of the main pipe 201 is less than or equal to 20 mm, the space occupied by the main pipe 201 can be reduced, thereby allowing the energy storage device 100 to have more space to accommodate the battery device 10, increasing the volumetric energy density of the energy storage device 100. Therefore, when the inner diameter of the main pipe 201 is 2 mm to 20 mm, the flow rate of the main pipe 201 and the dedicated space of the main pipe 201 can be balanced, reducing the risk of the main pipe 201 being blocked and increasing the volumetric energy density of the energy storage device 100.

[0150] In some embodiments, the inner diameter of the branch pipe 202 is 2mm-20mm.

[0151] The diameter of branch pipe 202 can be any one of the following: 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm, or a range between any two.

[0152] In this embodiment, when the inner diameter of the branch pipe 202 is greater than or equal to 2 mm, the flow rate of the branch pipe 202 can be increased, reducing the risk of the branch pipe 202 being blocked. When the inner diameter of the branch pipe 202 is less than or equal to 20 mm, the space occupied by the branch pipe 202 can be reduced, thereby allowing the energy storage device 100 to have more space to accommodate the battery device 10, increasing the volumetric energy density of the energy storage device 100. Therefore, when the inner diameter of the branch pipe 202 is 2 mm to 20 mm, the flow rate of the branch pipe 202 and the dedicated space of the branch pipe 202 can be balanced, reducing the risk of the branch pipe 202 being blocked and increasing the volumetric energy density of the energy storage device 100.

[0153] In some embodiments, the inner diameter of the main pipe 201 is 2mm-20mm. The inner diameter of the branch pipe 202 is 2mm-20mm.

[0154] The inner diameter of the main pipe 201 can be the same as that of the branch pipe 202; the inner diameter of the main pipe 201 can be larger than that of the branch pipe 202; or the inner diameter of the main pipe 201 can be smaller than that of the branch pipe 202.

[0155] In this embodiment, the flow rate and space occupied by the main pipe 201 and the branch pipe 202 can be balanced, reducing the risk of blockage of the fire protection pipeline system 20 and increasing the volumetric energy density of the energy storage device 100.

[0156] This application provides an energy storage system 1000, including a power conversion device and an energy storage device 100 provided in any of the above embodiments. The power conversion device is used to electrically connect a power generation device 3000 and an energy storage device 100.

[0157] This application provides a charging network 2000, including a charging pile 200 and an energy storage device 100 provided in any of the above embodiments. The energy storage device 100 is used to provide electrical energy to the charging pile 200.

[0158] Please refer to Figures 6-11. This application provides an energy storage device 100, including a battery device 10 and a fire-fighting piping system 20. The battery device 10 includes a housing 2 and individual battery cells 1, with the individual battery cells 1 housed within the housing 2. The fire-fighting piping system 20 is used to discharge waste from the housing 2. The fire-fighting piping system 20 includes a main pipe 201 and branch pipes 202. The branch pipes 202 are connected to the housing 2 and communicate with the main pipe 201. The main pipe 201 extends along the height direction Z of the energy storage device and includes a first pipe section 2011 located at the lowermost side of the main pipe 201. The fire-fighting piping system 20 also includes a collection component 203, which communicates with the main pipe 201 and is connected to the first pipe section 2011. The collection component 203 has a receiving space for containing condensate, and the collection component 203 is provided with a discharge port 2031 communicating with the receiving space. The fire hydrant system 20 also includes a plug 207 that removably plugs the discharge outlet 2031. The collection component 203 is configured to collect at least a portion of the condensate in the discharge from the main pipe 201.

[0159] In this embodiment, by setting a branch pipe 202 connected to the housing 2 and communicating with the main pipe 201, the discharge from the housing 2 can enter the main pipe 201 through the branch pipe 202 and be discharged. By setting a collection component 203 communicating with the main pipe 201, the collection component 203 can collect the condensate in the main pipe 201, thereby clearing the main pipe 201 and facilitating the discharge of the discharge from the fire-fighting pipeline system 20. On the one hand, this reduces the risk of increased internal pressure in the fire-fighting pipeline system 20 and the housing 2 due to blockage, thereby reducing the risk of damage to the fire-fighting pipeline system 20 and the housing 2. On the other hand, the discharge from the housing 2 reduces the impact of the discharge on the battery cells 1 inside the housing 2, thereby reducing the risk of explosion of the battery cells 1 inside the housing 2 and the risk of thermal diffusion of other battery cells 1. By setting the main pipe 201 to extend along the height direction Z of the energy storage device, it is beneficial for the condensate in the main pipe 201 to flow towards the collection component 203 along the height direction, improving the collection efficiency of the collection component 203. When the sealing element 207 disengages from the discharge port 2031, the condensate in the collection component 203 can be discharged through the discharge port 2031, facilitating the reuse of the collection component 203. When the sealing element 207 seals the discharge port 2031, the condensate in the containment space is less likely to flow out of the discharge port 2031, reducing the risk of the condensate flowing out of the discharge port 2031 and contaminating the energy storage device 100. In such an energy storage device 100, emissions from the battery device 10 can be discharged through the fire-fighting piping system 20, reducing the risk of the fire-fighting piping system 20 being blocked and improving the reliability of the energy storage device 100.

[0160] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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, comprising: A battery device includes a housing and individual battery cells, wherein the individual battery cells are housed within the housing; A fire-fighting piping system for discharging waste from the enclosure, the fire-fighting piping system including a main pipe and branch pipes, the branch pipes being connected to the enclosure and communicating with the main pipe; The fire-fighting piping system further includes a collection component connected to the main pipe, the collection component being configured to collect at least a portion of the condensate in the discharge within the main pipe.

2. The energy storage device as described in claim 1, wherein, The main pipe includes a first pipe section having a first end and a second end opposite to each other, the second end being positioned higher than the first end, the collecting component being connected to the first end, and the direction from the first end to the second end being the flow direction of the emissions within the first pipe section.

3. The energy storage device as described in claim 2, wherein, The first pipe section extends along the height direction of the energy storage device.

4. The energy storage device as described in claim 2 or 3, wherein, The first pipe section, the collecting component, and the branch pipe are connected by a first tee pipe.

5. The energy storage device as described in any one of claims 2-4, wherein, The energy storage device includes a plurality of battery devices, which are arranged along the height of the energy storage device, and the housing of each battery device is connected to the main pipe through a branch pipe; The main pipe includes multiple pipe segments, which are arranged along the height of the energy storage device. At least one end of each pipe segment is connected to a branch pipe, and the lowest pipe segment in the main pipe is the first pipe segment.

6. The energy storage device as described in claim 5, wherein, Along the height direction of the energy storage device, two adjacent pipe sections are connected to the branch pipe through a second tee pipe.

7. The energy storage device according to any one of claims 1-6, wherein, The energy storage device includes a plurality of battery devices, which are arranged along the height direction of the energy storage device. The housing of each battery device is connected to the main pipe through a branch pipe. Along the height direction of the energy storage device, the collection component is connected to the bottom end of the main pipe.

8. The energy storage device as claimed in claim 7, wherein, The main pipe extends along the height direction of the energy storage device.

9. The energy storage device according to any one of claims 1-8, wherein, The collecting component has a receiving space for containing the condensate, and the collecting component is provided with a discharge port communicating with the receiving space; The fire hydrant system also includes a sealing element that can be detachably sealed the discharge outlet.

10. The energy storage device as claimed in claim 9, wherein, Along the height direction of the energy storage device, the collecting component is connected to the bottom end of the main pipe, and the discharge port is located at the bottom end of the collecting component.

11. The energy storage device as claimed in claim 10, wherein, The collecting component includes a collecting pipe connected to the bottom end of the main pipe, the collecting pipe extending along the extension direction of the main pipe, and the discharge port located at the bottom end of the collecting pipe.

12. The energy storage device according to any one of claims 9-11, wherein, The sealing component is threadedly connected to the collecting component.

13. The energy storage device according to any one of claims 1-12, wherein, The battery device further includes a first pressure relief mechanism, which is disposed in the housing; The fire protection piping system also includes a gas collection hood, which is connected to the housing and covers the first pressure relief mechanism. The branch pipe is connected to the gas collection hood and connects the gas collection hood and the main pipe.

14. The energy storage device as claimed in claim 13, wherein, The battery device includes a battery compartment and a gas collection compartment, which are connected. The battery compartment is used to house the individual battery cells. The first pressure relief mechanism is disposed on the wall of the gas collection compartment, and the gas collection hood is connected to the wall of the compartment.

15. The energy storage device as claimed in claim 14, wherein, The chamber wall is the top wall of the gas collection chamber.

16. The energy storage device according to any one of claims 1-15, wherein, The branch pipe is equipped with a one-way valve, which is configured to allow the discharge from the tank to enter the main pipe through the branch pipe.

17. The energy storage device according to any one of claims 1-16, wherein, The inner diameter of the main tube is 2mm-20mm.

18. The energy storage device according to any one of claims 1-17, wherein, The inner diameter of the branch pipe is 2mm-20mm.

19. An energy storage system comprising a power conversion device and an energy storage device as claimed in any one of claims 1-18, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

20. A charging network comprising a charging pile and an energy storage device as described in any one of claims 1-18, the energy storage device being used to provide electrical energy to the charging pile.

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