Energy storage device, energy storage system and charging network

Abstract

The application discloses an energy storage device, an energy storage system and a charging network. The energy storage device comprises a warehouse body having a containing space, a battery device contained in the containing space, the battery device comprising a plurality of battery monomers, and a discharge assembly comprising a plurality of first discharge pipes corresponding to the pressure relief mechanisms of the plurality of battery monomers and communicating with the outside of the warehouse body, so that the discharge of the discharge pipes corresponding to the pressure relief mechanisms of the battery monomers is discharged to the outside of the warehouse body. The energy storage device, the energy storage system and the charging network can improve the reliability of the energy storage device.

Description

Technical Field

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

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

[0003] In the development of energy storage technology, besides improving the performance of energy storage devices, failure is also a problem that cannot be ignored. If a battery cell in an energy storage device experiences thermal runaway, the emissions from that cell accumulate inside the device, posing a serious risk of failure. Therefore, how to enhance the reliability of energy storage devices is a technical problem that urgently needs to be solved in energy storage technology. Utility Model Content

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

[0005] In a first aspect, this application provides an energy storage device, comprising: a housing having a receiving space; a battery device housed within the receiving space, the battery device including a plurality of battery cells; and a discharge assembly including a plurality of first discharge pipes, the plurality of first discharge pipes corresponding one-to-one with the pressure relief mechanisms of the plurality of battery cells and communicating with the outside of the housing, such that emissions discharged from the pressure relief mechanisms of the battery cells are discharged to the outside of the housing through the corresponding first discharge pipes.

[0006] In the technical solution of this application embodiment, by setting a discharge component for the energy storage device, the discharge component can be connected to the pressure relief mechanism of each battery cell, so that the discharge from any battery cell that has thermal runaway can be directly discharged to the outside of the energy storage device. This can reduce the risk of conductive particles in the discharge spreading inside the storage device and causing short circuits between battery cells, thereby reducing the risk of insulation failure of the energy storage device and improving the reliability of the energy storage device.

[0007] In some embodiments of the first aspect, the battery device includes a plurality of battery cell assemblies, each of the plurality of battery cell assemblies including a plurality of battery cells; the discharge assembly further includes a second discharge pipe, which is connected to a plurality of first discharge pipes, the second discharge pipe including a plurality of first collection sections, each of the plurality of first collection sections corresponding to one of the plurality of battery cell assemblies, the plurality of first collection sections being connected to the plurality of first discharge pipes and respectively communicating with the outside of the compartment.

[0008] In this embodiment, emissions from multiple first discharge pipes can be discharged to the outside of the storage chamber via a second discharge pipe. Compared to setting up a separate discharge channel for each first discharge pipe connected to a battery cell, allowing emissions from any battery cell to be discharged to the outside of the storage chamber, connecting the second discharge pipe to multiple first discharge pipes reduces the complexity of the discharge assembly, decreases discharge resistance, and reduces the space occupied by the discharge assembly, thus improving the space utilization of the energy storage device. Furthermore, the second discharge pipe includes multiple first collection sections, each capable of collecting emissions from any one of the multiple battery cells. This reduces the complexity of the discharge assembly and also increases the speed at which emissions from multiple battery cells undergoing thermal runaway are rapidly discharged to the outside of the storage chamber, reducing the risk of blockage in the discharge channel due to too many battery cells experiencing thermal runaway simultaneously.

[0009] In some embodiments of the first aspect, the second discharge pipe further includes a second collection section, through which the plurality of first collection sections are connected to the outside of the silo.

[0010] In this embodiment, emissions from multiple first collection sections can be directly discharged to the outside of the storage unit via a second collection section. This reduces the risk of discharge failure due to excessive discharge pipes and further reduces the space occupied by the discharge components, making the layout of the discharge components more compact and thus improving the space utilization of the energy storage device.

[0011] In some embodiments of the first aspect, the second aggregation segment is located at one end of the plurality of first aggregation segments.

[0012] In this embodiment of the application, the second collection section is set at one end of the plurality of first collection sections, which can collect the emissions emitted by multiple battery cells that simultaneously undergo thermal runaway, making it convenient to filter or purify them in a centralized manner before discharging them into the external environment, thereby reducing pollution to the surrounding environment.

[0013] In some embodiments of the first aspect, the energy storage device includes a plurality of battery devices; the emission assembly includes a plurality of second emission pipes, each of which corresponds to one of the plurality of battery devices.

[0014] In this embodiment, emissions from thermal runaway of any one or more battery cells in any battery device can be discharged to the outside of the storage unit via a second discharge pipe corresponding to that battery device. Furthermore, the second discharge pipes for each battery device can be of the same size, facilitating standardized manufacturing and easy installation, thus improving the production efficiency of the energy storage device.

[0015] In some embodiments of the first aspect, the discharge assembly further includes a third discharge pipe connected to a plurality of second discharge pipes and communicating through the silo to the outside of the silo.

[0016] In this embodiment, the third discharge pipe can pass through any wall of the storage chamber, thereby communicating with the outside of the storage chamber. This allows the emissions from the pressure relief mechanism of the battery cell to enter the second discharge pipe through the corresponding first discharge pipe, and then be uniformly discharged to the outside of the storage chamber through the third discharge pipe. Compared to setting a separate discharge channel for each second discharge pipe to discharge the emissions from any battery cell to the outside of the storage chamber, the third discharge pipe is connected to multiple second discharge pipes, which simplifies the structure of the discharge assembly and reduces the risk of insulation failure of the energy storage device due to the spread of emissions inside the storage chamber, thereby improving the reliability of the energy storage device.

[0017] In some embodiments of the first aspect, the third discharge pipe includes a plurality of first segments and second segments, the plurality of first segments being connected to a plurality of the second discharge pipes in a one-to-one correspondence, and the second segments being in communication with the plurality of first segments.

[0018] In this embodiment, the first segment connects to the second discharge pipe and the second segment, and the number of multiple first segments is the same as the number of multiple second discharge pipes, so that the emissions collected through the second discharge pipe can be discharged from the corresponding first segment. The multiple first segments are all connected to the second segment, thereby further collecting emissions from any one or more battery devices and discharging them uniformly to the outside of the storage unit through the second segment. This reduces the risk of corrosion or thermal runaway of other normally used components due to the spread of emissions inside the storage unit, and improves the reliability of the energy storage device.

[0019] In some embodiments of the first aspect, the energy storage device includes a plurality of battery clusters, each of the plurality of battery clusters including the plurality of battery devices, and the plurality of battery clusters are configured in one-to-one correspondence with the plurality of the second segments.

[0020] In this embodiment of the application, each battery cluster is provided with a second section, so that the emissions from multiple battery devices in the battery cluster can be discharged to the outside of the compartment through the second section.

[0021] In some embodiments of the first aspect, one end of the second segment along the axial direction of the second segment passes through the chamber and communicates with the outside of the chamber.

[0022] In this embodiment of the application, when any one or more battery cells experience thermal runaway, causing the pressure relief mechanism to be activated, the interior of the battery cell can be connected to the outside of the compartment through the corresponding first discharge pipe, second discharge pipe and third discharge pipe, so that the emissions inside the battery cell can be discharged to the outside of the compartment in a timely manner.

[0023] In some embodiments of the first aspect, the third discharge pipe further includes a third section connected to the plurality of the second sections, and passing through the chamber at one end along the axial direction of the third section, communicating with the outside of the chamber.

[0024] In this embodiment, the third segment can collect emissions from one or more second segments for centralized filtration or purification before being discharged into the external environment, thereby reducing pollution to the surrounding environment.

[0025] In some embodiments of the first aspect, the energy storage device further includes a fire-fighting pipeline connected to the second discharge pipe, the fire-fighting pipeline being used to inject fire-fighting medium into the second discharge pipe so that the fire-fighting medium enters the battery cell through the first discharge pipe corresponding to the battery cell.

[0026] In this embodiment, by providing an additional fire suppression pipeline for the energy storage device, a fire suppression medium can be injected into the interior of the battery cell experiencing thermal runaway, thereby suppressing further propagation of thermal runaway and improving the reliability of the energy storage device. Furthermore, since the fire suppression medium and the discharged waste share the first and second discharge pipes, the fire suppression pipeline can reduce the amount of space occupied inside the energy storage device, improving the space utilization rate of the energy storage device.

[0027] In some embodiments of the first aspect, the fire-fighting pipeline includes a plurality of first fire-fighting pipes and second fire-fighting pipes, the plurality of first fire-fighting pipes being connected one-to-one with a plurality of second discharge pipes, and the second fire-fighting pipes being connected to the plurality of first fire-fighting pipes.

[0028] In this embodiment, the fire-fighting medium can be injected from the second fire-fighting pipe, pass through the corresponding first fire-fighting pipe and the second discharge pipe into the corresponding battery device, and then pass through the first discharge pipe into the corresponding battery cell. This can simultaneously suppress the further spread of thermal runaway in multiple battery cells, improve the fire-fighting speed, and further improve the reliability of the energy storage device.

[0029] In some embodiments of the first aspect, the energy storage device includes multiple battery clusters, each of which includes multiple battery devices, and the multiple battery clusters are correspondingly arranged with multiple second fire-fighting pipes; the fire-fighting pipeline also includes a third fire-fighting pipe, which is connected to the multiple second fire-fighting pipes and passes through the compartment along the axial direction of the third fire-fighting pipe, communicating with the outside of the compartment; the fire-fighting medium is injected from the end of the third fire-fighting pipe located outside the compartment, passes through the corresponding second fire-fighting pipe and the first fire-fighting pipe, enters the second discharge pipe and the first discharge pipe corresponding to the battery cell, and enters the interior of the battery cell.

[0030] In this embodiment, by setting a third fire-fighting pipe and connecting multiple second fire-fighting pipes to the third fire-fighting pipe, the fire-fighting medium can enter multiple battery clusters simultaneously through the third fire-fighting pipe, thereby suppressing the thermal runaway battery cells in multiple battery clusters at the same time, which can improve the fire-fighting efficiency of the energy storage device and further enhance the reliability of the energy storage device.

[0031] In some embodiments of the first aspect, the fire-fighting conduit and the third discharge conduit are located on the same side or opposite sides of the second discharge conduit.

[0032] In this embodiment, the fire-fighting pipeline and the third discharge pipe are located on the same side of the second discharge pipe, which makes the fire-fighting pipeline and the third discharge pipe relatively concentrated, which can save the internal space of the energy storage device and improve the space utilization rate of the energy storage device; the fire-fighting pipeline and the third discharge pipe are located on opposite sides of the second discharge pipe, so that the discharge can be discharged from one side of the second discharge pipe and the fire-fighting medium can be injected from the other side of the second discharge pipe, thereby reducing the interference between the two.

[0033] In some embodiments of the first aspect, the energy storage device further includes a support and a plurality of trays, the support being used to hold the plurality of trays, the plurality of trays corresponding one-to-one with the plurality of battery devices.

[0034] In this embodiment, the support bracket allows for full utilization of the internal space of the energy storage device, enabling the placement of more battery devices. Furthermore, the battery devices can be placed directly on the tray without the need for an additional enclosure, thus freeing up more space within the energy storage device to accommodate more batteries and increasing its energy density.

[0035] In a second aspect, an energy storage system is provided, including a power conversion device and an energy storage device according to the first aspect or any embodiment thereof, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0036] Thirdly, a charging network is provided, including a charging pile and an energy storage device according to the first aspect or any embodiment of the first aspect, or an energy storage system according to the second aspect, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the energy storage device according to an embodiment of this application;

[0038] Figure 2 This is a partial structural schematic diagram of the energy storage device according to an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the battery device according to an embodiment of this application;

[0040] Figure 4 This is a top view of the battery device according to an embodiment of this application;

[0041] Figure 5 This is a cross-sectional and partially enlarged schematic diagram of the battery device according to an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the structure of a battery device according to another embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the battery cluster structure according to an embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the structure of multiple battery clusters according to an embodiment of this application;

[0045] Figure 9 This is a schematic diagram of the structure of multiple battery clusters according to another embodiment of this application;

[0046] Figure 10 This is a schematic diagram of the structure of an energy storage device according to another embodiment of this application;

[0047] Figure 11 This is a schematic diagram of the structure of multiple battery clusters according to another embodiment of this application;

[0048] Figure 12 This is a schematic diagram of the structure of multiple battery clusters according to another embodiment of this application;

[0049] Figure 13 This is a schematic diagram of an energy storage system according to an embodiment of this application;

[0050] Figure 14 This is a schematic diagram of the charging network structure according to an embodiment of this application.

[0051] The labels for each figure are as follows:

[0052] 1-Energy storage system; 2-Power conversion equipment; 3-Power generation equipment; 4-Charging pile; 5-Connector;

[0053] 10-Energy storage device; 11-Housing body; 101-Accommodation space; 20-Battery cluster; 21-Battery device; 221-Battery cell assembly; 211-Battery cell; 2110-Pressure relief mechanism; 2111-Connection part; 30-Discharge assembly; 310-First discharge pipe; 320-Third discharge pipe; 321-First section; 322-Second section; 323-Third section; 330-Second discharge pipe; 331-First collection section; 332-Second collection section; 40-Fire protection pipeline; 410-First fire protection pipe; 420-Second fire protection pipe; 433-Third fire protection pipe; 50-Support; 60-Pattern.

[0054] The accompanying drawings are not drawn to scale. Detailed Implementation

[0055] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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).

[0063] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0064] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0065] With the promotion and application of new energy sources, energy storage technology has developed accordingly. An energy storage system is a device or system capable of storing energy and releasing it when needed. In the field of new energy, energy storage systems typically refer to devices that can store electrical energy and release it during peak electricity demand periods. Energy storage systems play multiple roles in the power system, including load balancing, frequency regulation, backup power, peak-valley pricing management, and improving grid stability. With the rapid development of renewable energy, the importance of energy storage systems is increasing daily.

[0066] Electrochemical energy storage, represented by lithium-ion batteries, is the most prevalent energy storage technology. Electrochemical energy storage systems typically include multiple energy storage devices, which may include one or more battery clusters to enhance the voltage and capacity of the energy storage system. A battery cluster may include multiple battery apps, which are connected in series via busbars to increase the voltage of the energy storage system. When an energy storage system includes multiple battery clusters, these clusters are connected in parallel to increase the capacity of the energy storage system. Each battery app may include one or more battery cell assemblies to provide voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via busbars.

[0067] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0068] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0069] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0070] 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.

[0071] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0072] 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.

[0073] 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.

[0074] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0075] During operation, the individual battery cells inside an energy storage device generate a significant amount of heat, causing the device's temperature to rise. When the internal temperature reaches a certain level, the individual battery cells may experience thermal runaway, resulting in the release of large amounts of pollutants through their pressure relief mechanisms. The accumulation of these pollutants inside the energy storage device increases internal pressure and temperature, raising the risk of thermal runaway in other normally functioning battery cells. Furthermore, thermal runaway may lead to electrolyte leakage, causing corrosion of internal metal components and potentially resulting in insulation failure and short circuits.

[0076] Therefore, this application provides an energy storage device, an energy storage system, and a charging network that can solve the above-mentioned problems. The energy storage device of this application includes a housing, a battery unit, and a discharge assembly. The housing has a receiving space; the battery unit is housed within the receiving space and includes multiple battery cells; the discharge assembly includes multiple first discharge pipes, each corresponding to a pressure relief mechanism of one of the multiple battery cells and communicating with the outside of the housing. This allows emissions from the pressure relief mechanisms of the multiple battery cells to be discharged to the outside of the housing through the corresponding first discharge pipes, reducing the impact of emissions accumulating inside the energy storage device on other components. For example, considering the possibility of conductive substances in the emissions causing short circuits between battery cells or between battery cells and the housing, this reduces the risk of insulation failure in the energy storage device and also reduces the risk of thermal diffusion between battery cells, improving the reliability of the energy storage device.

[0077] The technical solutions described in this application can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. Energy storage devices can store electrical energy as needed and output it at appropriate times. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application can be any power system that requires energy storage devices.

[0078] 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.

[0079] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0080] 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.

[0081] 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.

[0082] 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 modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0083] As an example, the master control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The master control module can monitor information such as the 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 master control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0084] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0085] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0086] Figure 1 A schematic diagram of the structure of the energy storage device 10 according to an embodiment of this application is shown; Figure 2 A partial structural schematic diagram of the energy storage device 10 according to an embodiment of this application is shown; Figure 3 A schematic diagram of a battery device 21 according to an embodiment of this application is shown, for example, Figure 3 As shown Figure 1 A schematic diagram of the structure of a battery device 21 in the energy storage device 10 shown; Figure 4 As shown Figure 3 A top view of the battery device 21 shown; Figure 5 It shows Figure 4 The diagram shows a cross-section and a partially enlarged view of the battery device 21 along section line A-A'. The following will be combined with... Figures 1 to 5 The energy storage device 10 is described in detail.

[0087] like Figures 1 to 5As shown, the energy storage device 10 includes a housing 11, a battery device 21, and a discharge assembly 30. The housing has a receiving space 101. The battery device 21 is housed in the receiving space 101 and includes multiple battery cells 211. The discharge assembly 30 includes multiple first discharge pipes 310, which correspond one-to-one with the pressure relief mechanisms 2110 of the multiple battery cells 211 and are connected to the outside of the housing 11, so that the emissions discharged from the pressure relief mechanisms 2110 of the battery cells 211 are discharged to the outside of the housing 11 through the corresponding first discharge pipes 310.

[0088] It should be understood that the compartment 11 may have multiple walls, which enclose each other to form a receiving space 101. The receiving space 101 may accommodate one or more battery devices 21, and each battery device 21 may include multiple battery cells 211.

[0089] In this embodiment of the application, the battery device 21 may refer to a battery pack including a housing and battery cell components, or it may refer to a battery module directly composed of multiple battery cells.

[0090] In this embodiment, the battery cell 211 can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. Furthermore, the shape of the battery cell 211 can be any polyhedron, such as a cuboid or a cylinder.

[0091] The battery cell 211 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., and the embodiments of this application are not limited to this.

[0092] In some embodiments, the battery cell 211 is provided with a pressure relief mechanism 2110. The pressure relief mechanism 2110 is used to release the internal gas of the battery cell 211.

[0093] As an example, the internal pressure or temperature of the battery cell 211 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 211 reaches the predetermined threshold, the pressure relief mechanism 2110 is activated or a weak structure in the pressure relief mechanism 2110 is damaged, thereby forming an opening or channel for the release of internal pressure or temperature. The 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 211.

[0094] As an example, the pressure relief mechanism 2110 can be disposed on the outer casing of the battery cell 211 and integrally formed with the outer casing of the battery cell 211.

[0095] As an example, the pressure relief mechanism 2110 can also be separately configured and connected to the housing.

[0096] The term "actuation" as used in this application refers to the pressure relief mechanism 2110 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 211. The actions of the pressure relief mechanism 2110 may include, but are not limited to: movement of components within the pressure relief mechanism 2110 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 2110, etc. When the pressure relief mechanism 2110 is actuated, the high-temperature, high-pressure substances inside the battery cell 211 are discharged outwards from the actuated portion as waste. This method enables the battery cell 211 to release pressure and temperature under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0097] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism 2110 can be configured as a through hole for discharging gas inside the battery cell 211.

[0098] The emissions from the battery cell 211 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0099] In some embodiments, the energy storage device 10 may contain battery cells that have experienced thermal runaway. For example, the battery device 21 may contain one or more battery cells 211 that have experienced thermal runaway, and the energy storage device 10 may contain one or more battery devices 21 with battery cells 211 experiencing thermal runaway. Here, a battery cell 211 experiencing thermal runaway may refer to a battery cell 211 whose internal pressure or temperature has reached a predetermined threshold.

[0100] In this embodiment, the emission assembly 30 includes a plurality of first emission pipes 310. The number of the plurality of first emission pipes 310 is the same as the number of battery cells 211, and the two correspond one-to-one. The first emission pipes 310 can be correspondingly arranged with the pressure relief mechanism 2110 of the battery cell 211, so that when thermal runaway occurs in the battery cell 211, the internal emissions can be discharged from the pressure relief mechanism 2110 and directly enter the first emission pipes 310.

[0101] Multiple first discharge pipes 310 correspond one-to-one with the pressure relief mechanisms 2110 of multiple battery cells 211. This can mean that the multiple first discharge pipes 310 are directly connected to the pressure relief mechanisms 2110 of multiple battery cells 211, or it can mean that the multiple first discharge pipes 310 are connected to the outer casing of the corresponding pressure relief mechanism 2110 of the battery cell 211, so that the emissions discharged from the pressure relief mechanism 2110 can directly enter the first discharge pipes 310.

[0102] It should be understood that the first discharge pipe 310 and the pressure relief mechanism 2110 of the battery cell 211 can be directly connected or indirectly connected. (Refer to...) Figures 3 to 5 In some embodiments, the pressure relief mechanism 2110 may include a connecting portion 2111, and the first discharge pipe 310 may be connected to the connecting portion 2111 of the pressure relief mechanism 2110; or, the first discharge pipe 310 may be integral with the pressure relief mechanism 2110 or the pressure relief mechanism 2110, so that the emissions discharged from the pressure relief mechanism 2110 can directly enter the first discharge pipe 310, thereby reducing the impact of the emissions discharged by the battery cell 211 that has experienced thermal runaway on other battery cells 211 or other components in the energy storage device 10, and improving the reliability of the energy storage device 10.

[0103] By providing a discharge component 30 to the energy storage device 10, which can be connected to the pressure relief mechanism 2110 of each battery cell 211, the emissions from any battery cell 211 that has experienced thermal runaway can be directly discharged to the outside of the storage chamber 11 of the energy storage device 10. This reduces the risk of conductive particles in the emissions spreading inside the storage chamber 11 and causing short circuits between battery cells 211, thereby reducing the risk of insulation failure of the energy storage device 10 and improving the reliability of the energy storage device 10.

[0104] In some embodiments, such as Figure 1 and Figure 2 As shown, the energy storage device 10 may also include a support 50 and multiple trays 60. The support 50 is used to place the multiple trays 60, and the multiple trays 60 correspond one-to-one with multiple battery devices 21.

[0105] The energy storage device 10 may include a plurality of battery devices 21. When the battery device 21 is a battery pack with a housing, the energy storage device 10 may include a support 50, on which the plurality of battery devices 21 are placed directly.

[0106] When the battery device 21 is a battery module composed of multiple battery cells, a tray 60 can be provided on the support 50 to hold the battery device 21.

[0107] It should be understood that the support 50 allows the internal space of the energy storage device 10 to be fully utilized, thereby accommodating more battery devices 21. In addition, the battery devices 21 can be placed directly on the tray 60 without the need for an additional housing, thus freeing up more space in the energy storage device 10 to accommodate more battery devices 21 and increasing the energy density of the energy storage device 10.

[0108] Furthermore, for ease of description, this application embodiment uses a cuboid-shaped battery cell 211 as an example, defining three reference directions. The thickness direction of the battery cell 211 is direction X, the height direction of the battery cell 211 is direction Z, and the length direction of the battery cell 211 is direction Y. The thickness direction X, the height direction Z, and the length direction Y of the battery cell 211 are perpendicular to each other, and the dimension of the battery cell 211 in the thickness direction X is smaller than the dimension in the length direction Y.

[0109] Please refer further to some embodiments of this application. Figure 3 In some embodiments, the battery device 21 includes a plurality of battery cell assemblies 221, each of the plurality of battery cell assemblies 221 including a plurality of battery cells 211; the discharge assembly 30 further includes a second discharge pipe 330, the second discharge pipe 330 being connected to a plurality of first discharge pipes 310, the second discharge pipe 330 including a plurality of first collection sections 331, the plurality of first collection sections 331 corresponding one-to-one with the plurality of battery cell assemblies 221, the plurality of first collection sections 331 being connected to the plurality of first discharge pipes 310, and communicating with the outside of the compartment 11.

[0110] In some embodiments, a plurality of battery cells 211 may be arranged along a first direction, and a plurality of first collection segments 331 may be arranged along a second direction, wherein the first direction is perpendicular to the second direction. The first direction is the arrangement direction of the plurality of battery cells 211; for example, the first direction may be as follows: Figure 3 The thickness direction X of the battery cell 211 shown is shown; the second direction is a direction perpendicular to the arrangement direction of the multiple battery cells 211, for example, this second direction can be as follows: Figure 3 The length direction Y of the battery cell shown.

[0111] The battery cell assembly 221 can be formed by arranging multiple battery cells 211. As an example, the battery cell assembly 221 can be a battery module, which is formed by arranging and fixing multiple battery cells 211 into an independent module. As an example, a battery module can be formed by bundling multiple battery cells 211 together with cable ties.

[0112] The battery device 21 includes a plurality of battery cell assemblies 221, each of the plurality of battery cell assemblies 221 including a plurality of battery cells 211. It can be understood that the plurality of battery cells 211 are arranged along a first direction to form a battery cell assembly 221, and the plurality of battery cell assemblies 221 are arranged along a second direction to form the battery device 21. Alternatively, it can be understood that the battery device 21 includes a plurality of battery cells 211 respectively along the first direction and along the second direction.

[0113] The emission assembly 30 may also include a second emission pipe 330, with multiple first emission pipes 310 connected to the second emission pipe 330, so that the emissions in the multiple first emission pipes 310 can be discharged to the outside of the compartment 11 through the second emission pipe 330. Compared with setting a separate emission channel for each first emission pipe 310 connected to the battery cell 211 so that the emissions of any battery cell 211 can be discharged to the outside of the compartment 11, by setting the second emission pipe 330 to connect to multiple first emission pipes 310, the complexity of the emission assembly 30 can be reduced, the discharge resistance can be reduced, and the space occupied by the emission assembly 30 can be reduced, thereby improving the space utilization of the energy storage device 10.

[0114] The second discharge pipe 330 may include multiple first collection sections 331, which are arranged along a second direction, and each first collection section 331 corresponds one-to-one with a multiple battery cell assembly 221. This can be understood as each first collection section 331 being connected to multiple first discharge pipes 310, which in turn are connected to multiple battery cells 211 arranged along a first direction; that is, the number of first collection sections 331 is the same as the number of battery cell assemblies 221. Figure 3 As shown, taking the battery device 21 as an example, which includes four battery cell assemblies 221, the emission assembly 30 also includes four first collection sections 331. Each first collection section 331 can collect the emissions of any one or more of the battery cells 211 corresponding to the first collection section 331.

[0115] By setting the second discharge pipe 330 to include multiple first collection sections 331, each first collection section 331 can collect the emissions from any one of the multiple battery cells 211, which can reduce the complexity of the discharge assembly 30. At the same time, it can also increase the speed at which the emissions from multiple battery cells 211 are quickly discharged to the outside of the chamber 11 after thermal runaway, reducing the risk of the discharge channel being blocked due to too many battery cells 211 thermally runaway at the same time.

[0116] In some embodiments, the second discharge pipe 330 may further include a second collection section 332, through which a plurality of first collection sections 331 communicate with the outside of the chamber 11. It should be understood that the second collection section 332 may be located at any end of the plurality of first collection sections 331 along a first direction, thereby connecting the plurality of first collection sections 331. One or more second collection sections 332 may be provided.

[0117] For example, such as Figures 3 to 5As shown, a second collecting section 332 can be provided and connected to any end of the plurality of first collecting sections 331 or any end along the first direction. In some embodiments, the second collecting section 332 is located at one end of the plurality of first collecting sections 331. By providing the second collecting section 332 at one end of the plurality of first collecting sections 331, the emissions emitted by multiple battery cells 211 that simultaneously undergo thermal runaway can be collected uniformly, facilitating centralized filtration or purification before being discharged into the external environment, thereby reducing pollution to the surrounding environment.

[0118] For example, such as Figure 6 As shown, two second collection segments 332 can also be provided, each connecting the two ends of multiple first collection segments 331 along a first direction, wherein the first direction can be... Figure 6 The direction X is shown. In some embodiments, there are two second collection sections 332, which are located at opposite ends of the plurality of first collection sections 331 along the first direction. In this way, the emission speed of the emissions can be accelerated, and the overall emission efficiency of the emission assembly 30 can be improved.

[0119] By setting up a first collection section 331 and a second collection section 332, the emissions from multiple first collection sections 331 can be directly discharged to the outside of the storage unit 11 through the second collection section 332. This reduces the risk of discharge failure due to excessive discharge pipes and further reduces the space occupied by the discharge components 30. The layout of the discharge components 30 is more compact, thereby improving the space utilization of the energy storage device 10.

[0120] In some embodiments, such as Figure 7 As shown, the energy storage device 10 includes multiple battery devices 21; the emission assembly 30 includes multiple second emission pipes 330, and the multiple second emission pipes 330 correspond one-to-one with the multiple battery devices 21.

[0121] It should be understood that each battery device 21 is provided with a corresponding second discharge pipe 330, and multiple second discharge pipes 330 are connected to the outside of the storage unit 11. When any one or more battery cells 211 in any battery device 21 experience thermal runaway, the emissions emitted can be directly discharged to the outside of the storage unit 11 through the corresponding second discharge pipe 330. Furthermore, the second discharge pipe 330 for each battery device 21 can be of the same size, thereby facilitating standardized manufacturing of the discharge pipe and making installation convenient, thus improving the production efficiency of the energy storage device 10.

[0122] In some embodiments, further reference is made to Figure 7The emission assembly 30 also includes a third emission pipe 320, which is connected to a plurality of second emission pipes 330 and passes through the compartment and communicates with the outside of the compartment 11. Thus, emissions from the pressure relief mechanism 2110 of a battery cell 211 that has experienced thermal runaway pass through the corresponding first emission pipe 310 into the second emission pipe 330, and are discharged to the outside of the compartment 11 through the third emission pipe 320.

[0123] It should be understood that multiple second discharge pipes 330 are connected to the third discharge pipe 320, and each second discharge pipe 330 and the third discharge pipe 320 can be directly connected or indirectly connected through a connector. The third discharge pipe 320 can pass through any wall of the compartment 11, thereby communicating with the outside of the compartment 11. This allows the emissions discharged from the pressure relief mechanism 2110 of the battery cell 211 to enter the second discharge pipe 330 through the corresponding first discharge pipe 310, and then be uniformly discharged to the outside of the compartment 11 through the third discharge pipe 320. Compared to setting a separate discharge channel for each second discharge pipe 330 to discharge the emissions of any battery cell 211 to the outside of the compartment 11, connecting the third discharge pipe 320 with multiple second discharge pipes 330 simplifies the structure of the discharge assembly 30 and reduces the risk of insulation failure of the energy storage device 10 due to the spread of emissions inside the compartment 11, thereby improving the reliability of the energy storage device 10.

[0124] In some embodiments, such as Figure 7 As shown, the third discharge pipe 320 may include multiple first segments 321 and second segments 322. The multiple first segments 321 are connected to multiple second discharge pipes 330 in a one-to-one correspondence, and the second segments 322 are connected to the multiple first segments 321.

[0125] It should be understood that the first segment 321 connects the second discharge pipe 330 and the second segment 320, and the number of multiple first segments 321 is the same as the number of multiple second discharge pipes 330, so that the emissions passing through the second discharge pipe 330 can be discharged from the corresponding first segment 321. The multiple first segments 321 are all connected to the second segment 322, thereby further collecting emissions from any one or more battery devices 21 and discharging them to the outside of the housing 11 through the second segment 322. This reduces the risk of corrosion or thermal runaway of other normally used components due to the spread of emissions inside the housing 11, and improves the reliability of the energy storage device 10.

[0126] In some embodiments, such as Figure 8 As shown, the energy storage device 10 may include multiple battery clusters 20, each battery cluster 20 including multiple battery devices 21, and the multiple battery clusters 20 are arranged in a one-to-one correspondence with multiple second segments 322. It should be understood that the number of multiple battery clusters 20 and multiple second segments 322 is the same, such as... Figure 8As shown, each battery cluster 20 is provided with a second section 322, so that the emissions of multiple battery devices 21 in the battery cluster 20 can be discharged to the outside of the compartment 11 through the second section.

[0127] In some embodiments, a plurality of battery devices 21 are arranged along a third direction, which is perpendicular to the first direction and the second direction. The third direction may refer to... Figure 8 The Z direction is shown.

[0128] It should be understood that each battery cluster 20 can be directly discharged to the outside of the compartment 11 through the second section 322 of the corresponding third discharge pipe 320. That is, the second section 322 of each third discharge pipe 320 passes through the compartment wall, so that the outside of the compartment 11 is connected to the pressure relief mechanism 2110 of each battery cell 211 in sequence through the third discharge pipe 320, the second discharge pipe 330, and the first discharge pipe 310. Alternatively, a third section can be provided, so that the multiple second sections 322 of multiple battery clusters 20 are connected to the third section, and the emissions from the battery cells that have experienced thermal runaway are uniformly discharged to the outside of the compartment 11 through the third section.

[0129] In some embodiments, a battery cluster 20 may include a support 50 and a plurality of trays 60. If the energy storage device 10 includes a plurality of battery clusters 20, then each battery cluster 20 may include a support 50 and a plurality of trays 60 for placing a plurality of battery devices 21 arranged along a third direction.

[0130] Each battery cluster 20 is provided with a corresponding support 50, so that the internal space of the energy storage device 10 can be fully utilized, thereby allowing more battery devices 21 to be placed. In addition, the battery devices 21 can be placed directly on the tray 60 without the need for an additional box to place the battery devices 21, thereby freeing up more space in the energy storage device 10 to accommodate more battery devices 21 and increasing the energy density of the energy storage device 10.

[0131] In some embodiments, such as Figure 8 As shown, and refer to Figure 1 The second segment 322 extends through the compartment 11 at one end along its axial direction and communicates with the outside of the compartment 11. That is, the second segment 322 corresponding to each battery cluster 20 extends along its axial direction and penetrates the compartment wall, thereby communicating with the outside of the compartment 11. When any one or more battery cells 211 experience thermal runaway, causing the pressure relief mechanism to be activated, the interior of the battery cell 211 can communicate with the outside of the compartment 11 through the corresponding first discharge pipe 310, second discharge pipe 330, and third discharge pipe 320, so that the emissions inside the battery cell 211 can be discharged to the outside of the compartment 11 in a timely manner.

[0132] In some embodiments, such as Figure 9 and Figure 10 As shown, the third discharge pipe 320 also includes a third section 323, which is connected to a plurality of second sections 322 and passes through the silo 11 at one end along the axial direction of the third section 323, communicating with the outside of the silo 11.

[0133] It should be understood that the third segment 323 can penetrate any wall of the compartment 11 at either end along its axial direction, thereby communicating with the outside of the compartment 11. For example, the third segment 323 can penetrate the side wall of the compartment 11 along its axial direction, so that the outside of the compartment 11 can communicate with the battery cell 211 inside the compartment 11 through the third segment 323. The third segment 323 can collect emissions from one or more of the second segments 322 for centralized filtration or purification before being discharged into the external environment, thereby reducing pollution to the surrounding environment.

[0134] It should be understood that the connection between the first discharge pipe 310, the third discharge pipe 320, and the second discharge pipe 330 in any of the above-described discharge components 30 is a sealed connection, that is, the discharge channel formed by the connection is isolated from the interior of the storage device 10 housing 11. After the pressure relief mechanism of the battery cell 211 is actuated and damaged, its discharge channel can communicate with the interior of the battery cell 211, but it remains isolated from the interior of the housing 11.

[0135] In some embodiments, the energy storage device 10 may further include a fire-fighting pipeline. The fire-fighting pipeline may be the same as or partially the same as the discharge assembly 30 described in any one or more of the above embodiments. Alternatively, the discharge assembly 30 described in any one or more of the above embodiments may be used directly as a fire-fighting pipeline, that is, the fire-fighting medium may be injected from one end of the third discharge pipe 320 located outside the housing 11, and pass through the second discharge pipe 330 and the first discharge pipe 310 in sequence, entering the interior of the thermally runaway battery cell 211, thereby suppressing further thermal diffusion of the thermally runaway battery cell 211.

[0136] In some embodiments, the discharge assembly 30 of the energy storage device 10 can also be used as a fire suppression pipeline, so that in the event of thermal runaway of a battery cell 211, the discharge assembly 30 can both discharge pollutants and inject fire suppression medium into the thermally runaway battery cell 211. For example, the fire suppression medium can be injected from one end of the third discharge pipe 320 located outside the housing 11, passing sequentially through the second discharge pipe 330 and the first discharge pipe 310, and entering the interior of the thermally runaway battery cell 211, thereby suppressing further thermal runaway propagation of the battery cell 211. Discharging pollutants from inside the battery cell 211 through the discharge assembly 30 and injecting fire suppression medium into the battery cell 211 through the discharge assembly 30 can reduce the risk of internal insulation failure of the energy storage device 10 due to untimely discharge of pollutants, and can also further suppress the propagation of thermal runaway, improving the reliability of the energy storage device 10. In addition, the discharge channel for pollutants and the injection channel for fire suppression medium share a common channel, which can reduce the complexity of the internal structure of the energy storage device 10 and improve the space utilization of the energy storage device 10.

[0137] In some embodiments, the energy storage device 10 may further include a fire-fighting pipeline that is at least partially different from the discharge assembly 30. The discharge assembly 30 discharges pollutants, while the fire-fighting medium is injected through the fire-fighting pipeline. This reduces mutual interference between the pollutants and the fire-fighting medium, increases the discharge rate and fire protection speed, and further enhances the reliability of the energy storage device 10. The specific structure of the fire-fighting pipeline can be configured according to the actual application. For example, the fire-fighting pipeline may include a portion of the pipeline of the discharge assembly 30 to simplify the structure.

[0138] In some embodiments, the energy storage device 10 further includes a fire-fighting pipeline connected to a plurality of first discharge pipes 310. The fire-fighting pipeline is used to inject fire-fighting medium into the first discharge pipes 310 so that the fire-fighting medium can directly enter the interior of the corresponding battery cell 211, thereby suppressing further thermal diffusion of the battery cell 211 that has experienced thermal runaway.

[0139] In some embodiments, the fire-fighting pipeline can also be connected to the third discharge pipe 320. The fire-fighting pipeline is used to inject the fire-fighting medium into the third discharge pipe 320 so that the fire-fighting medium passing through the third discharge pipe 320 enters the corresponding battery cell 211 through the first discharge pipe 310, thereby suppressing further thermal diffusion of the battery cell 211 that has experienced thermal runaway. At the same time, the fire-fighting medium and the discharge share the first discharge pipe 310 and the third discharge pipe 320, which can reduce the fire-fighting pipeline from occupying too much space inside the energy storage device 10 and improve the space utilization rate of the energy storage device 10.

[0140] The thermal runaway of a battery cell 211 not only actuates the pressure relief mechanism 2110, causing the discharge of internal contaminants, but also places the thermally runaway battery cell 211 under high temperature and pressure, making it susceptible to affecting other normal battery cells 211 in the vicinity, thus causing a series of chain reactions. Therefore, by providing an additional fire suppression pipeline to the energy storage device 10, a fire suppression medium can be injected into the battery cell 211, thereby suppressing the further spread of thermal runaway from the battery cell 211 and improving the reliability of the energy storage device 10.

[0141] Figure 11 and Figure 12 Two structural diagrams of multiple battery clusters 20, each containing a fire-fighting conduit 40, are shown respectively. The following will be combined with... Figure 11 and Figure 12 Describe the fire protection pipe 40.

[0142] In some embodiments, the energy storage device 10 further includes a fire-fighting conduit 40 connected to a second discharge pipe 330. The fire-fighting conduit 40 is used to inject fire-fighting medium into the second discharge pipe 330, so that the fire-fighting medium enters the battery cell 211 through the first discharge pipe 310 corresponding to the battery cell 211. The fire-fighting medium and the discharged material share the first discharge pipe 310 and the second discharge pipe 330, which reduces the space occupied by the fire-fighting conduit inside the energy storage device 10 and improves the space utilization rate of the energy storage device 10.

[0143] In some embodiments, the fire-fighting pipeline 40 may include a plurality of first fire-fighting pipes 410 and second fire-fighting pipes 420, wherein the plurality of first fire-fighting pipes 410 are connected to a plurality of second discharge pipes 330 in a one-to-one correspondence, and the second fire-fighting pipes 420 are connected to the plurality of first fire-fighting pipes 410.

[0144] In this embodiment, the fire-fighting pipeline 40 may include a plurality of first fire-fighting pipes 410, the number of which is the same as the number of second discharge pipes 330, that is, the number of the plurality of first fire-fighting pipes 410 is the same as the number of the plurality of battery devices 21. When a thermally runaway battery cell 211 exists in the energy storage device 10, a fire-fighting medium can be injected into the corresponding battery device 21 through the first fire-fighting pipes 410 and then into the corresponding battery cell 211 through the first discharge pipes 310, thereby suppressing further thermal diffusion of the thermally runaway battery cell 211 and improving the reliability of the energy storage device 10.

[0145] It should be understood that the fire-fighting pipeline 40 also includes a second fire-fighting pipeline 420, and multiple first fire-fighting pipelines 410 are connected to the second fire-fighting pipeline 420, so that the fire-fighting medium can be injected from the second fire-fighting pipeline 420, enter the corresponding battery device 21 through the corresponding first fire-fighting pipeline 410 and the second discharge pipe 330, and then enter the corresponding battery cell 211 through the first discharge pipe 310. This can simultaneously suppress further thermal diffusion of the thermally runaway battery cells 211 in multiple battery devices 21, improve the fire-fighting speed, and further improve the reliability of the energy storage device 10.

[0146] It should be understood that the fire-fighting pipe 40 can be located inside the storage unit 11 or partially outside the storage unit 11. For example, the second fire-fighting pipe 420 can pass through the storage unit 11 at one end along its axial direction and communicate with the outside of the storage unit 11. When there is a thermally runaway battery cell inside the energy storage device 10, the fire-fighting medium is injected from the outside of the storage unit 11 through the second fire-fighting pipe 420, thereby suppressing the further spread of the thermally runaway battery cell.

[0147] In some embodiments, the fire-fighting pipeline 40 may further include a third fire-fighting pipe 430, which is connected to a plurality of second fire-fighting pipes 420 and passes through the axial direction of the third fire-fighting pipe 430 through the compartment 11 and communicates with the outside of the compartment 11. The fire-fighting medium is injected from the end of the third fire-fighting pipe 430 located outside the compartment 11, passes through the corresponding second fire-fighting pipe 420 and the first fire-fighting pipe 410 and enters the second discharge pipe 330 and the first discharge pipe 310 corresponding to the battery cell 211, and enters the interior of the battery cell 211.

[0148] It should be understood that the energy storage device 10 includes multiple battery clusters 20, and the number of multiple second fire-fighting pipes 420 is the same as the number of battery clusters 20, that is, the multiple battery clusters 20 and the multiple second fire-fighting pipes 420 are arranged in a one-to-one correspondence. By setting a third fire-fighting pipe 430, the multiple second fire-fighting pipes 420 are connected to the third fire-fighting pipe 430. The fire-fighting medium can enter the multiple battery clusters 20 simultaneously through the third fire-fighting pipe 430, thereby simultaneously suppressing the thermal runaway of the battery cells 211 in the multiple battery clusters 20, which can improve the fire-fighting efficiency of the energy storage device 10 and further enhance its reliability.

[0149] It should be understood that the fire-fighting pipe 40 is connected to the second discharge pipe 330, and the third discharge pipe 320 is also connected to the second discharge pipe 330. The fire-fighting pipe 40 and the third discharge pipe 320 are set up independently of each other. The fire-fighting pipe 40 and the third discharge pipe 320 can be set on the same side or opposite side of the second discharge pipe 330.

[0150] In some embodiments, the fire hydrant 40 and the third discharge pipe 320 may be located on the same side or opposite sides of the second discharge pipe 330. For example... Figure 11As shown, the fire-fighting pipe 40 and the third discharge pipe 320 are located on the same side of the second discharge pipe 330, making the fire-fighting pipe 40 and the third discharge pipe 320 relatively concentrated, which can save internal space of the energy storage device 10 and improve the space utilization rate of the energy storage device 10. Figure 12 As shown, the fire-fighting pipe 40 and the third discharge pipe 320 are located on opposite sides of the second discharge pipe 330. The discharge material can be discharged from one side of the second discharge pipe 330, and the fire-fighting medium can be injected from the other side of the second discharge pipe 330, thereby reducing the interference between the two.

[0151] It should be understood that the connections between the first fire pipe 410, the second fire pipe 420, and the third fire pipe 430 in any of the aforementioned fire pipe systems 40, as well as between the fire pipe system 40 and the second discharge pipe 330, are all sealed connections. That is, the fire-fighting medium injection channel formed by the connection is isolated from the interior of the storage unit 11. After the pressure relief mechanism of the battery cell 211 is actuated, its fire-fighting medium injection channel can communicate with the interior of the battery cell 211, but it remains isolated from the interior of the storage unit 11.

[0152] It should be understood that fire-fighting media can refer to any substance used for extinguishing, preventing, or inhibiting the spread of fire or high-temperature gases, and fire-fighting media can include liquids, gases, or solids. In some embodiments, fire-fighting media include: water and water-based fire-fighting foam, perfluorohexanone, heptafluoropropane, and liquid nitrogen, etc.

[0153] According to some embodiments of this application, this application also provides an energy storage system, including a power conversion device 2 and an energy storage device 10 as described in any of the above schemes (PowerConverter System, abbreviated as PCS), wherein the power conversion device 2 is used to electrically connect the power generation device 3 and the energy storage device 10.

[0154] In some embodiments, such as Figure 13 As shown, the energy storage system 1 may include one or more energy storage devices 10 and a power conversion device 2, which is connected between the power generation device 3 and the energy storage device 10. The power generation device 3 generates electrical energy, which can be stored in the energy storage device 10 through the power conversion device 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0155] According to some embodiments of this application, this application also provides a charging network, including a charging pile 4 and an energy storage device 10 or an energy storage system as described in any of the above embodiments, wherein the energy storage device 10 is used to provide electrical energy to the charging pile.

[0156] In some embodiments, such as Figure 14 As shown, the charging network includes a charging pile 4 and an energy storage device 10. The charging pile 4 is electrically connected to the energy storage device 10, which provides power to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 10 via a cable, and the battery device can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical equipment (such as vehicles) to replenish power to the equipment.

[0157] In some embodiments, the energy storage device 10 may be located inside the charging pile 4 (e.g., an integrated energy storage and charging unit) or outside the charging pile 4.

[0158] According to some embodiments of this application, see Figures 1 to 12 This application provides an energy storage device, including: a housing 11 having a receiving space 101; a battery device 21 housed in the receiving space 101, the battery device 21 including a plurality of battery cells 211; and a discharge assembly 30 including a plurality of first discharge pipes 310 and a third discharge pipe 320, the plurality of first discharge pipes 310 being connected one-to-one with the pressure relief mechanisms 2110 of the plurality of battery cells 211, and the end of each of the plurality of first discharge pipes 310 away from the corresponding pressure relief mechanism 2110 being connected to the third discharge pipe 320, the third discharge pipe 320 passing through the housing 11 and communicating with the outside of the housing 11, so that the emissions discharged from the pressure relief mechanisms 2110 of the battery cells 211 enter the third discharge pipe 320 through the corresponding first discharge pipe 310 and are discharged to the outside of the housing 11 through the third discharge pipe 320.

[0159] The battery device 21 includes a plurality of battery cell assemblies 221, each of which includes the plurality of battery cells 211 arranged along a first direction; the discharge assembly 30 also includes a second discharge pipe 330, a plurality of first discharge pipes 310 being connected to a third discharge pipe 320 through the second discharge pipe 330, the second discharge pipe 330 including a plurality of first converging sections 331, the plurality of first converging sections 331 being arranged along a second direction, the plurality of first converging sections 331 corresponding one-to-one with the plurality of battery cell assemblies 221, the first direction being perpendicular to the second direction.

[0160] The second discharge pipe 330 also includes a second collection section 332, and multiple first collection sections 331 are connected to the third discharge pipe 320 through the second collection section 332.

[0161] The second collection segment 332 is located at one end of the plurality of first collection segments 331 along a first direction.

[0162] The energy storage device includes multiple battery devices 21; the emission assembly 30 includes multiple second emission pipes 330, each of which corresponds to one of the multiple battery devices 21.

[0163] The third discharge pipe 320 includes multiple first segments 321 and second segments 322. The multiple first segments 321 are connected to multiple second discharge pipes 330 in a one-to-one correspondence, and the second segments 322 are connected to the multiple first segments 321.

[0164] The energy storage device includes multiple battery clusters 20, each of which includes multiple battery devices 21 arranged along a third direction. The multiple battery clusters 20 are arranged in a one-to-one correspondence with multiple second segments 322, and the third direction is perpendicular to the first direction and the second direction.

[0165] The second segment 322 passes through the silo body 11 at one end along its axial direction and communicates with the outside of the silo body 11.

[0166] The third discharge pipe 320 also includes a third section 323, which is connected to a plurality of second sections 322 and passes through the silo 11 at one end along the axial direction of the third section 323, communicating with the outside of the silo 11.

[0167] The energy storage device also includes a fire-fighting pipeline 40, which is connected to a second discharge pipe 330. The fire-fighting pipeline 40 is used to inject fire-fighting medium into the second discharge pipe 330 so that the fire-fighting medium enters the battery cell 211 through the first discharge pipe 310 corresponding to the battery cell 211.

[0168] The fire protection pipeline 40 includes multiple first fire protection pipes 410 and second fire protection pipes 420. The multiple first fire protection pipes 410 are connected to multiple second discharge pipes 330 in a one-to-one correspondence, and the second fire protection pipes 420 are connected to the multiple first fire protection pipes 410.

[0169] The fire-fighting pipeline 40 also includes a third fire-fighting pipe 430, which is connected to multiple second fire-fighting pipes 420 and passes through the axial direction of the third fire-fighting pipe 430 through the compartment 11, communicating with the outside of the compartment 11. The fire-fighting medium is injected from the end of the third fire-fighting pipe 430 located outside the compartment 11, passes through the corresponding second fire-fighting pipe 420 and the first fire-fighting pipe 410, enters the second discharge pipe 330 and the first discharge pipe 310 corresponding to the battery cell 211, and enters the interior of the battery cell 211.

[0170] Fire-fighting pipe 40 and third discharge pipe 320 are located on the same side or opposite sides of second discharge pipe 330.

[0171] The energy storage device also includes a support 50 and multiple trays 60. The support 50 is used to place the multiple trays 60, and the multiple trays 60 correspond one-to-one with multiple battery devices 21.

[0172] 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 by, include: The storage body (11) has a receiving space (101). A battery device (21) is housed within the housing space (101) and the battery device (21) includes a plurality of battery cells (211). The discharge assembly (30) includes a plurality of first discharge pipes (310), each of which corresponds to a pressure relief mechanism (2110) of a plurality of battery cells (211) and is connected to the outside of the chamber (11), so that the emissions discharged from the pressure relief mechanism (2110) of the battery cells (211) are discharged to the outside of the chamber (11) through the corresponding first discharge pipe (310).

2. The energy storage device of claim 1, wherein, The battery device (21) includes a plurality of battery cell assemblies (221), each of the plurality of battery cell assemblies (221) including a plurality of battery cells (211). The emission assembly (30) further includes a second emission pipe (330), which is connected to a plurality of first emission pipes (310). The second emission pipe (330) includes a plurality of first collection sections (331), which correspond one-to-one with a plurality of battery cell assemblies (221). The plurality of first collection sections (331) are connected to the plurality of first emission pipes (310) and are connected to the outside of the compartment (11).

3. The energy storage device of claim 2, wherein, The second discharge pipe (330) also includes a second collection section (332), through which a plurality of first collection sections (331) are connected to the outside of the silo (11).

4. The energy storage device of claim 3, wherein, The second collection segment (332) is located at one end of the plurality of first collection segments (331).

5. The energy storage device according to claim 2, characterized in that, The energy storage device includes a plurality of the battery devices (21); The emission assembly (30) includes a plurality of second emission pipes (330), each of which corresponds to a plurality of battery devices (21).

6. The energy storage device according to claim 5, characterized in that, The discharge assembly (30) also includes a third discharge pipe (320) which is connected to a plurality of second discharge pipes (330) and passes through the silo (11) and communicates with the outside of the silo (11).

7. The energy storage device according to claim 6, characterized in that, The third discharge pipe (320) includes a plurality of first segments (321) and second segments (322), the plurality of first segments (321) are connected to the plurality of second discharge pipes (330) in a one-to-one correspondence, and the second segments (322) are connected to the plurality of first segments (321).

8. The energy storage device according to claim 7, characterized in that, The energy storage device includes multiple battery clusters (20), each of the multiple battery clusters (20) includes multiple battery devices (21), and the multiple battery clusters (20) are configured in a one-to-one correspondence with multiple second segments (322).

9. The energy storage device according to claim 8, characterized in that, The second segment (322) passes through the silo body (11) at one end along the axial direction of the second segment (322) and communicates with the outside of the silo body (11).

10. The energy storage device according to claim 8, characterized in that, The third discharge pipe (320) also includes a third section (323), which is connected to a plurality of second sections (322) and one end of the third section (323) passes through the silo (11) along the axial direction and communicates with the outside of the silo (11).

11. The energy storage device according to claim 6, characterized in that, The energy storage device also includes a fire-fighting pipeline (40), which is connected to the second discharge pipe (330). The fire-fighting pipeline (40) is used to inject fire-fighting medium into the second discharge pipe (330) so that the fire-fighting medium enters the battery cell (211) through the first discharge pipe (310) corresponding to the battery cell (211).

12. The energy storage device according to claim 11, characterized in that, The fire-fighting pipeline (40) includes a plurality of first fire-fighting pipes (410) and second fire-fighting pipes (420). The plurality of first fire-fighting pipes (410) are connected to the plurality of second discharge pipes (330) in a one-to-one correspondence, and the second fire-fighting pipes (420) are connected to the plurality of first fire-fighting pipes (410).

13. The energy storage device according to claim 12, characterized in that, The energy storage device includes multiple battery clusters (20), each of the multiple battery clusters (20) includes multiple battery devices (21), and the multiple battery clusters (20) are arranged one-to-one with multiple second fire pipes (420); The fire-fighting pipeline (40) also includes a third fire-fighting pipe (430), which is connected to a plurality of second fire-fighting pipes (420) and passes through the silo (11) along the axial direction of the third fire-fighting pipe (430), communicating with the outside of the silo (11). The fire-fighting medium is injected from the end of the third fire-fighting pipe (430) located outside the silo (11), passes through the corresponding second fire-fighting pipe (420) and the first fire-fighting pipe (410) and enters the second discharge pipe (330) and the first discharge pipe (310) corresponding to the battery cell (211), and enters the interior of the battery cell (211).

14. The energy storage device according to any one of claims 11 to 13, characterized in that, The fire-fighting pipe (40) and the third discharge pipe (320) are located on the same side or opposite sides of the second discharge pipe (330).

15. The energy storage device according to any one of claims 1 to 13, characterized in that, The energy storage device also includes a bracket (50) and a plurality of trays (60), the bracket (50) being used to place the plurality of trays (60), the plurality of trays (60) corresponding one-to-one with the plurality of battery devices (21).

16. An energy storage system, characterized in that, It includes a power conversion device (2) and an energy storage device (10) according to any one of claims 1 to 15, wherein the power conversion device (2) is used to electrically connect the power generation device (3) and the energy storage device (10).

17. A charging network, characterized in that, The system includes a charging pile (4) and an energy storage device (10) according to any one of claims 1 to 15 or an energy storage system according to claim 16, wherein the energy storage device (10) is used to provide electrical energy to the charging pile (4).

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