Battery device, energy storage device, energy storage system and charging network

Abstract

The embodiment of the utility model provides a battery device, an energy storage device, an energy storage system and a charging network, and belongs to the technical field of battery devices. The battery device comprises a box body, the box body comprises a first box body part, and a first exhaust channel is arranged in the first box body part; the battery monomer comprises a shell, an electrode assembly and a pressure relief mechanism, the electrode assembly is arranged in the shell, and the shell comprises a first wall; wherein a boss is arranged on the outer surface of the first wall, a second exhaust channel is formed in the boss, at least part of the boss is inserted into the first exhaust channel, and the second exhaust channel is communicated with the first exhaust channel; the pressure relief mechanism is arranged in the second exhaust passage or arranged on the first wall, the second exhaust passage is used for guiding emissions of the battery monomers to be discharged to the first exhaust passage when the pressure relief mechanism is started, and the second exhaust passage can provide a starting space for the pressure relief mechanism; and the boss is inserted into the first exhaust channel, so that the contact between emissions of the battery monomer and metal at the periphery of the battery monomer can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery devices, and in particular to a battery device, an energy storage device, an energy storage system, and a charging network. Background Art

[0002] With the rapid development of science and technology, electricity has become an indispensable energy source for people's production and daily life. To improve the smoothness of electricity supply and ensure the normal operation of production and life, energy storage devices are needed. Energy storage devices can realize the cyclic storage and release of electric energy. By charging or discharging the battery of the energy storage device, the electric energy can be stored in the energy storage device or supplied to the power-consuming device. 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.

[0003] In the development of energy storage devices, in addition to improving the endurance of energy storage devices, improving the reliability of battery devices is also an issue that cannot be ignored. Therefore, how to improve the reliability of battery devices is a technical issue that needs continuous improvement in energy storage technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device, an energy storage device, an energy storage system and a charging network to provide an opening space for the pressure relief mechanism and reduce the contact between the emissions of the battery cells and the surrounding metal of the battery cells, thereby improving the reliability of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising:

[0006] The box body includes a first box body component, wherein a first exhaust passage is provided inside the first box body component; and

[0007] A battery cell is disposed in the box, the battery cell comprising a housing, an electrode assembly, and a pressure relief mechanism, the electrode assembly is disposed in the housing, and the housing comprises a first wall;

[0008] The outer surface of the first wall is provided with a boss, the interior of the boss is provided with a second exhaust channel, the boss is at least partially inserted into the first exhaust channel, and the second exhaust channel is communicated with the first exhaust channel;

[0009] The pressure relief mechanism is disposed in the second exhaust channel or on the first wall. The second exhaust channel is used to guide the exhaust of the battery cells to be discharged into the first exhaust channel when the pressure relief mechanism is opened.

[0010] In the technical solution of the embodiment of the present application, a boss having a second exhaust channel is provided on the outer surface of the first wall of the housing, and a pressure relief mechanism is disposed within the second exhaust channel or on the first wall. This second exhaust channel provides opening space for the pressure relief mechanism, reducing the possibility of the pressure relief mechanism being blocked by the surrounding structures of the battery cells and difficult to open. When the pressure relief mechanism is opened, because the boss is at least partially inserted into the first exhaust channel, the exhaust from the battery cells is guided by the second exhaust channel and discharged into the first exhaust channel. This prevents the random ejection of the exhaust from the battery cells due to the obstruction of the rupture valve plate of the pressure relief mechanism, reduces the contact between the exhaust from the battery cells and the surrounding metal of the battery cells, and reduces the possibility of short circuits or insulation failures, thereby improving the reliability of the battery device.

[0011] In an optional embodiment, the boss is an insulating member.

[0012] By configuring the boss as an insulating member, the entire boss possesses insulation capabilities. When the pressure relief mechanism is activated, the valve plate cracks and is confined within the second vent channel, making it difficult for it to come into contact with the battery module (composed of multiple battery cells) or other locations within the battery device, thus preventing insulation failure.

[0013] In an optional embodiment, an inner wall of the second exhaust channel is provided with an insulating layer.

[0014] An insulating layer is provided on the inner wall of the second exhaust channel to provide insulation. When the pressure relief mechanism is activated, the valve plate cracks and becomes confined within the second exhaust channel, preventing contact with the battery module (consisting of multiple battery cells) or other locations within the battery device, thus preventing insulation failure.

[0015] In an optional embodiment, all surfaces of the boss are provided with the insulating layer.

[0016] By providing an insulating layer on all surfaces of the boss, the boss is insulated. When the pressure relief mechanism is activated, the valve plate cracks and is confined within the second exhaust channel, making it difficult for it to come into contact with the battery module (composed of multiple battery cells) or other locations within the battery device, thus preventing insulation failure.

[0017] In an optional embodiment, the boss is integrally formed with the first wall.

[0018] The boss is configured as a structure integrally formed with the first wall to improve the integration of the battery cell and simplify the structure of the battery cell.

[0019] In an optional embodiment, the boss and the first wall are formed separately, and the boss is connected to the first wall.

[0020] The first wall and the boss can be formed by separate molding, and the boss can be fixedly connected to the first wall by welding, riveting, connecting with threaded connectors, gluing, etc.

[0021] In an optional embodiment, the pressure relief mechanism is provided on the first wall;

[0022] The battery cell further includes an insulating sheet connected to the outer surface of the first wall, and the insulating sheet is provided with a through hole opposite to the pressure relief mechanism;

[0023] The boss is arranged on a side of the insulating sheet facing away from the first wall, and the second exhaust channel is communicated with the through hole.

[0024] The boss is installed by connecting an insulating sheet to the outer surface of the first wall and arranging the boss on the side of the insulating sheet facing away from the first wall so that the boss is installed on the outer surface of the first wall through the insulating sheet.

[0025] In an optional embodiment, the boss and the insulating sheet are integrally formed.

[0026] The boss is configured as a structure integrally formed with the insulating sheet to improve the integration of the battery cell and simplify the structure of the battery cell.

[0027] In an optional embodiment, the shape of the cross section of the second exhaust channel matches the shape of the pressure relief mechanism, and the cross-sectional area of ​​the second exhaust channel is not less than the cross-sectional area of ​​the pressure relief mechanism.

[0028] By matching the cross-sectional shape of the second exhaust channel with that of the pressure relief mechanism and ensuring that the cross-sectional area of ​​the second exhaust channel is not less than that of the pressure relief mechanism, the obstruction of the pressure relief mechanism by the second exhaust channel is reduced, and the pressure relief mechanism can be fully opened.

[0029] In an optional embodiment, the central axis of the second exhaust channel is a straight line or an arc.

[0030] When the central axis of the second exhaust channel is a straight line, the overall shape of the second exhaust channel can be cylindrical, truncated cone, regular prism, or regular prism-shaped. In this case, the exhaust from the battery cells can be discharged in a straight line. When the central axis of the second exhaust channel is an arc, the boss can be in the shape of a curved tube. In this case, the exhaust from the battery cells can be discharged along the direction of the arc.

[0031] In an optional embodiment, the housing further includes a second wall, and the second wall is arranged opposite to the first wall along the thickness direction of the first wall;

[0032] The battery cell further includes an electrode terminal, which is disposed on the second wall and is electrically connected to the electrode assembly.

[0033] The electrode terminals are arranged opposite to the bosses on both sides of the battery cell to facilitate arrangement of the battery cell in the battery device.

[0034] In an optional embodiment, the first box component is further provided with a through hole communicating with the first exhaust channel, and the boss is inserted into the first exhaust channel through the through hole.

[0035] By allowing the boss of the battery cell to be inserted into the first exhaust channel through the via hole, exhaust from the battery cell can be discharged directly into the first exhaust channel. This reduces contact between exhaust from the battery cell and surrounding metal, lowering the possibility of short circuits or insulation failure, thereby improving the reliability of the battery device. Exhaust that enters the first exhaust channel will be discharged outside the battery device through the first exhaust channel.

[0036] In a second aspect, the present application provides an energy storage device, which includes the battery device in the above embodiment.

[0037] The energy storage device provided in the present application includes the battery device described in any one of the embodiments of the first aspect, and thus has the technical effects described in any one of the above embodiments, which will not be described in detail here.

[0038] In a third aspect, the present application provides an energy storage system, which includes an energy storage converter and the energy storage device in the above embodiment, wherein the energy storage converter is used to electrically connect a power generation device and the energy storage device.

[0039] The energy storage system provided in the present application includes the energy storage device described in any one of the embodiments of the second aspect, and thus has the technical effects described in any one of the above embodiments, which will not be described in detail here.

[0040] In a fourth aspect, the present application provides a charging network, which includes a charging pile and the energy storage device in the above embodiment, and the energy storage device is used to provide electrical energy to the charging pile.

[0041] According to the charging network provided in the present application, since it includes the energy storage device described in any one of the embodiments of the second aspect, it has the technical effects described in any one of the above embodiments, which will not be repeated here.

[0042] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0044] Figure 1 This is a schematic diagram of the structure of a charging network in some embodiments of the present application;

[0045] Figure 2 A schematic diagram of the structure of an energy storage system in some embodiments of the present application;

[0046] Figure 3 Schematic diagram of the structure of the energy storage device in some embodiments of the present application;

[0047] Figure 4 Schematic diagram of the exploded structure of a battery device in some embodiments of the present application;

[0048] Figure 5 This is a first structural schematic diagram of a battery cell in some embodiments of the present application;

[0049] Figure 6 for Figure 5 A structural diagram from another angle;

[0050] Figure 7 This is a second structural schematic diagram of a battery cell in some embodiments of the present application;

[0051] Figure 8 This is a third structural schematic diagram of a battery cell in some embodiments of the present application;

[0052] Figure 9 This is a fourth structural schematic diagram of a battery cell in some embodiments of the present application;

[0053] Figure 10 This is a fifth structural schematic diagram of a battery cell in some embodiments of the present application;

[0054] Figure 11 This is a sixth structural schematic diagram of a battery cell in some embodiments of the present application;

[0055] Figure 12 This is a schematic diagram of the assembly of the battery cell and the first box component in some embodiments of the present application.

[0056] The accompanying drawings in the specific implementation manner are as follows:

[0057] 1000, charging network; 2000, energy storage system; 3000, power generation device;

[0058] 100. Battery device;

[0059] 10. Box body; 11. First part; 12. Second part;

[0060] 20. Battery cell; 21. Housing; 211. First wall; 212. Second wall; 22. Electrode terminal; 23. Pressure relief mechanism; 24. Boss; 241. Second exhaust channel; 25. Insulation sheet;

[0061] 30. First box component; 31. Through hole; 32. First exhaust channel;

[0062] 200. Energy storage device; 210. Energy storage box;

[0063] 300, charging pile;

[0064] 400. Energy storage and conversion device. DETAILED DESCRIPTION

[0065] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of this application.

[0066] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0067] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0069] The term "plurality" used in this application refers to two or more (including two).

[0070] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies to provide voltage and capacity.

[0071] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells, which are connected in series, parallel, or in parallel via a busbar. For example, a battery cell assembly can be a battery module, which is composed of multiple battery cells arranged and fixed together to form a single module. For example, a battery module can be formed by bundling multiple battery cells using cable ties.

[0072] In a battery device, in order to ensure the safety of battery cells, a pressure relief mechanism is usually provided on the outer shell of the battery cell to release the internal pressure of the battery cell through the pressure relief mechanism, thereby effectively improving the safety of the battery cell.

[0073] However, in existing battery devices, the outer side of the pressure relief mechanism of the battery cell is often blocked by the surrounding structures inside the battery device (such as beams, insulation pads or other structures), leaving no opening space for the pressure relief mechanism, which affects the opening of the pressure relief mechanism and causes the battery cell to explode.

[0074] Furthermore, existing battery cell pressure relief mechanisms are typically thin metal sheets. Once activated, these sheets can overlap with surrounding metal, leading to insulation failure. Once activated, discharges from the battery cells (such as electrolyte within the cells, dissolved or split positive and negative electrode plates, separator fragments, or high-temperature, high-pressure gases generated by the reaction) are released in non-uniform and random directions. This can lead to widespread contamination of the battery module or device, potentially causing short circuits or insulation failure elsewhere.

[0075] In order to reduce the obstruction of the pressure relief mechanism of the battery cell by the surrounding structure of the battery cell, research has found that a boss with a channel can be set on the outside of the battery cell to provide an opening space for the pressure relief mechanism through the channel. The channel can also be used to guide the discharge of the battery cell's emissions when the pressure relief mechanism is opened, thereby improving the performance and service life of the power battery device.

[0076] Based on the above considerations, and to address the issue of a battery cell's pressure relief mechanism lacking opening space, a battery cell design was developed. A boss with a channel is provided on the outer surface of the first wall of the housing, and the pressure relief mechanism is positioned within the channel or on the first wall. This channel provides opening space for the pressure relief mechanism, reducing the likelihood of the pressure relief mechanism being blocked by the surrounding structure of the battery cell and difficult to open. When the pressure relief mechanism is opened, the discharge from the battery cell is guided by the channel, preventing the discharge from the battery cell from being randomly ejected due to being blocked by the ruptured valve plate of the pressure relief mechanism. This reduces contact between the discharge from the battery cell and the surrounding metal of the battery cell, reducing the possibility of short circuits or insulation failures, and thereby improving the reliability of the battery device.

[0077] The battery device disclosed in the embodiments of the present application can be applied to energy storage devices such as energy storage containers or energy storage cabinets.

[0078] The battery device 100 is described below with reference to the accompanying drawings.

[0079] Please refer to Figure 1 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a charging network 1000 provided in some embodiments of the present application. Figure 3 A schematic diagram of the structure of an energy storage device 200 provided in some embodiments of the present application. Embodiments of the present application provide a charging network 1000, which includes charging piles 300, which are used to charge electrical devices. Charging network 1000 may also include an energy storage device 200, which is electrically connected to charging piles 300 and is used to provide electrical energy to charging piles 300.

[0080] It should be noted that the charging pile 300 is electrically connected to the battery cells in the energy storage device 200 via a cable, and the battery cells can provide their stored energy to the charging pile 300. The charging pile 300 has a connector that can be connected to an electrical device to replenish energy. The application of the energy storage device 200 in the charging network 1000 can effectively improve the safety of the charging network 1000 and also help increase the flexibility of the charging network 1000 during deployment.

[0081] In a charging network 1000 , there may be one charging pile 300 , and the energy storage device 200 provides power to the one charging pile 300 ; there may also be multiple charging piles 300 , and the energy storage device 200 provides power to multiple charging piles 300 .

[0082] As an example, Figure 1 As shown, the charging network 1000 includes an energy storage device 200 and two charging piles 300 , and one energy storage device 200 provides power to the two charging piles 300 .

[0083] The energy storage device 200 may include a battery device 100 , which is electrically connected to the charging pile 300 so that the battery device 100 provides electrical energy to the charging pile 300 .

[0084] Please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of the structure of an energy storage system 2000 provided in some embodiments of the present application. Embodiments of the present application provide an energy storage system 2000. The energy storage system 2000 includes an energy storage converter 400, which can be electrically connected to a power generation device 3000 to convert the electric power provided by the power generation device 3000. The energy storage system 2000 may also include an energy storage device 200, which is electrically connected to the energy storage converter 400. The energy storage converter 400 converts the electric energy provided by the power generation device 3000 into the energy storage device 200 for storage.

[0085] The power conversion device is connected between the power generation device 3000 and the energy storage device 200. The power generation device 3000 is used to generate electrical energy, and the power generation device 3000 is used to store the generated electrical energy in the energy storage device 200 via the power conversion device. The use of the energy storage device 200 in the energy storage system 2000 can effectively improve the operational safety of the energy storage system 2000. In a specific implementation, the power generation equipment can specifically include solar panels, hydroelectric power generation equipment, thermal power generation equipment, etc. The specific type of power generation equipment is not limited in this application.

[0086] As an example, Figure 2 As shown, the energy storage system 2000 includes an energy storage device 200 and an energy storage conversion device 400. The two power generation devices 3000 respectively transmit the generated electric energy to the energy storage conversion device 400, and the electric energy is introduced into the energy storage device 200 for storage through the energy storage conversion device 400.

[0087] Please refer to Figure 3 The energy storage device 200 includes an energy storage box 210 , in which the battery device 100 is disposed.

[0088] As an example, the energy storage device 200 may be an energy storage container, an energy storage cabinet, etc.

[0089] As an example, the energy storage device 200 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage power station can store electric energy during low power consumption periods and provide electric energy to relevant users or electrical equipment during peak power consumption periods. The wind energy collected by the wind turbines of the wind power generation system is converted into electric energy and then stored by the energy storage device 200. The solar power generation system can convert solar energy into electric energy, which is then stored by the energy storage device 200 and supplied to users in a timely manner. The mobile power system can supply power to relevant electrical equipment in places where the power grid power supply system cannot reach, such as remote mountainous areas, remote wilderness areas, etc. The temporary power supply system can provide power to users when the power supply is insufficient.

[0090] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the exploded structure of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 is used to provide a space for the battery cell 20 and can adopt various structures.

[0091] In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which cover each other and together define a storage space for accommodating the battery cells 20. The second portion 12 may be a hollow structure with one end open, and the first portion 11 may be a plate-like structure, with the first portion 11 covering the open side of the second portion 12, so that the first portion 11 and the second portion 12 together define a storage space. The first portion 11 and the second portion 12 may also be hollow structures with one end open, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0092] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery device 20 may be housed within the housing 10. Of course, the battery device 100 may also be a battery device module formed by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid connection, and then the multiple battery device modules are further connected in series, in parallel, or in a hybrid connection to form an entire battery device, and then housed within the housing 10. The battery device 100 may also include other structures, for example, the battery device 100 may further include a busbar component for electrically connecting the multiple battery cells 20.

[0093] Each battery cell 20 may be a secondary battery device. A secondary battery device refers to a battery cell that can be continuously used by activating active materials by charging after discharge.

[0094] According to some embodiments of this application, please refer to Figure 5 and Figure 6 , Figure 5 This is a first structural diagram of a battery cell 20 provided in some embodiments of the present application. Figure 6 for Figure 5 A structural diagram of another angle of the battery device 100. The battery cell 20 refers to the smallest unit that constitutes the battery device 100. Figure 5 and Figure 6 The battery cell 20 includes a housing 21, a battery cell assembly and other functional components.

[0095] The outer shell 21 includes end caps and a housing. The end caps are components that fit over the openings of the housing to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end caps can be adapted to the shape of the housing to fit the housing. Optionally, the end caps can be made of a material with a certain degree of hardness and strength (such as aluminum alloy). This reduces deformation during compression and collision, providing the battery cell 20 with greater structural strength and improved safety. Functional components such as electrode terminals 22 can be provided on the end caps. The electrode terminals 22 can be used to electrically connect to the battery cell assembly for inputting or outputting electrical energy to the battery cell 20. In some embodiments, the end caps can also be provided with a pressure relief mechanism 23 for relieving internal pressure in the battery cell 20 when the internal pressure or temperature reaches a threshold. The end caps can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic, and this is not particularly limited in the present embodiments. In some embodiments, an insulating member may be provided inside the end cap to isolate the electrical connection components in the housing from the end cap to reduce the risk of short circuit.

[0096] The shell is a component used to cooperate with the end cover to form the internal environment of the battery cell 20, wherein the internal environment formed can be used to accommodate the battery cell assembly, electrolyte and other components. The shell and the end cover can be independent components, and an opening can be set on the shell, and the internal environment of the battery cell 20 is formed by covering the opening with the end cover at the opening. Without limitation, the end cover and the shell can also be integrated. Specifically, the end cover and the shell can form a common connection surface before other components are put into the shell, and when the interior of the shell needs to be encapsulated, the end cover is covered with the shell. The shell can be of various shapes and sizes, such as rectangular, cylindrical, hexagonal, etc. Specifically, the shape of the shell can be determined according to the specific shape and size of the battery cell assembly. The material of the shell can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0097] The battery cell assembly is a component in the battery cell 20 where electrochemical reactions occur. One or more battery cell assemblies may be contained in the shell. The battery cell assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active substances constitute the main body of the battery cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active substances each constitute the tab. The positive electrode tab and the negative electrode tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery device 100, the positive electrode active substance and the negative electrode active substance react with the electrolyte, and the tabs are connected to the electrode terminals 22 to form a current loop.

[0098] According to some embodiments of the present application, referring to Figure 4-Figure 6 , and please refer to Figure 7-12 , Figure 7 This is a second structural diagram of a battery cell 20 in some embodiments of the present application. Figure 8 This is a third structural diagram of a battery cell 20 in some embodiments of the present application. Figure 9 This is a fourth structural diagram of a battery cell 20 in some embodiments of the present application. Figure 10 This is a fifth structural diagram of a battery cell 20 in some embodiments of the present application. Figure 11 This is a sixth structural diagram of a battery cell 20 in some embodiments of the present application. Figure 12 Schematic diagram of the assembly of the battery cell 20 and the first box component 30 in some embodiments of the present application.

[0099] The present application provides a battery device 100 including a housing 10 and a battery cell 20 . The housing 10 includes a first housing component 30 . A first exhaust passage 32 is provided inside the first housing component 30 .

[0100] The battery cell 20 is disposed in the box body 10 . The battery cell 20 includes a shell 21 , an electrode assembly, and a pressure relief mechanism 23 . The shell 21 includes a first wall 211 , and the electrode assembly is disposed in the shell 21 .

[0101] The outer surface of the first wall 211 is provided with a boss 24 , the interior of the boss 24 is provided with a second exhaust channel 241 , the boss 24 is at least partially inserted into the first exhaust channel 32 , and the second exhaust channel 241 is communicated with the first exhaust channel 32 .

[0102] The pressure relief mechanism 23 is disposed in the second exhaust passage 241 (see Figure 9 ) or disposed on the first wall 211 (refer to Figure 5-Figure 8 、 Figure 10-11 ), the second exhaust channel 241 is used to guide the exhaust of the battery cell 20 to be discharged to the first exhaust channel 32 when the pressure relief mechanism 23 is opened.

[0103] The first box member 30 can be selected as a bottom wall, a side wall or a crossbeam of the box body 10 .

[0104] In the technical solution of the embodiment of the present application, a boss 24 having a second exhaust channel 241 is provided on the outer surface of the first wall 211 of the housing 21, and the pressure relief mechanism 23 is disposed within the second exhaust channel 241 or on the first wall 211. This allows the second exhaust channel 241 to provide opening space for the pressure relief mechanism 23, reducing the possibility of the pressure relief mechanism 23 being blocked by the surrounding structures of the battery cells 20 and difficult to open. When the pressure relief mechanism 23 is opened, because the boss 24 is at least partially inserted into the first exhaust channel 32, the exhaust from the battery cells 20 is guided by the second exhaust channel 241 and discharged into the first exhaust channel 32. This prevents the exhaust from the battery cells 20 from being randomly ejected due to the obstruction of the rupture valve plate of the pressure relief mechanism 23, reduces contact between the exhaust from the battery cells 20 and the surrounding metal of the battery cells 20, and reduces the possibility of short circuits or insulation failures, thereby improving the reliability of the battery device 100.

[0105] According to some embodiments of the present application, referring to Figure 5-Figure 6 , the boss 24 is an insulating member.

[0106] By configuring the boss 24 as an insulating member, the entire boss 24 possesses insulation capabilities. When the pressure relief mechanism 23 is activated, the valve plate cracks and is confined within the second vent channel 241, making it difficult for it to come into contact with the battery module (composed of multiple battery cells 20) or other locations within the battery device 100, thus preventing insulation failure.

[0107] According to some embodiments of the present application, referring to Figure 5-Figure 6 , an insulating layer is provided on the inner wall of the second exhaust channel 241 .

[0108] An insulating layer is provided on the inner wall of the second exhaust channel 241 to provide insulation. When the pressure relief mechanism 23 is activated, the valve plate cracks and becomes confined within the second exhaust channel 241, preventing contact with the battery module (composed of multiple battery cells 20) or other locations within the battery device 100, thus preventing insulation failure.

[0109] According to some embodiments of the present application, referring to Figure 5-Figure 6 , all surfaces of the boss 24 are provided with an insulating layer.

[0110] By providing an insulating layer on all surfaces of the boss 24, the boss 24 possesses insulation capabilities. When the pressure relief mechanism 23 is activated, the valve plate cracks and is confined within the second vent channel 241, making it difficult for it to come into contact with the battery module (composed of multiple battery cells 20) or other locations within the battery device 100, thus preventing insulation failure.

[0111] According to some embodiments of the present application, the boss 24 and the first wall 211 are integrally formed.

[0112] The boss 24 is configured as a structure integrally formed with the first wall 211 to improve the integration of the battery cell 20 and simplify the structure of the battery cell 20 .

[0113] According to some embodiments of the present application, referring to Figure 7 The boss 24 can be formed separately from the first wall 211 , and the boss 24 is connected to the first wall 211 .

[0114] The first wall 211 and the boss 24 can be formed by separate molding, and then the boss 24 can be fixedly connected to the first wall 211 by welding, bonding, fastening, clamping or pressing.

[0115] According to some embodiments of the present application, referring to Figure 5-Figure 8 、 Figure 10-11 The pressure relief mechanism 23 is disposed on the first wall 211 .

[0116] The battery cell 20 further includes an insulating sheet 25 . The insulating sheet 25 is connected to the outer surface of the first wall 211 . The insulating sheet 25 is provided with a through hole opposite to the pressure relief mechanism 23 .

[0117] The boss 24 is disposed on a side of the insulating sheet 25 facing away from the first wall 211 , and the second exhaust channel 241 is communicated with the through hole.

[0118] The boss 24 is installed on the outer surface of the first wall 211 by connecting the insulating sheet 25 to the outer surface of the first wall 211 and arranging the boss 24 on the side of the insulating sheet 25 facing away from the first wall 211 so that the boss 24 is installed on the outer surface of the first wall 211 through the insulating sheet 25.

[0119] According to some embodiments of the present application, referring to Figure 8 The boss 24 and the insulating sheet 25 are integrally formed.

[0120] The boss 24 is configured as a structure integrally formed with the insulating sheet 25 to improve the integration of the battery cell 20 and simplify the structure of the battery cell 20 .

[0121] In other embodiments, the boss 24 and the insulating sheet 25 may also be formed separately, as long as the boss 24 and the insulating sheet 25 can be connected.

[0122] According to some embodiments of the present application, referring to Figure 5-Figure 11 The shape of the cross section of the second exhaust channel 241 matches the shape of the pressure relief mechanism 23 , and the cross-sectional area of ​​the second exhaust channel 241 is not less than the cross-sectional area of ​​the pressure relief mechanism 23 .

[0123] By matching the cross-sectional shape of the second exhaust channel 241 with the shape of the pressure relief mechanism 23 and ensuring that the cross-sectional area of ​​the second exhaust channel 241 is not less than the cross-sectional area of ​​the pressure relief mechanism 23, the obstruction of the pressure relief mechanism 23 by the second exhaust channel 241 is reduced, and the pressure relief mechanism 23 can be fully opened.

[0124] According to some embodiments of the present application, the central axis of the second exhaust channel 241 is a straight line (refer to Figure 5-Figure 9 ) or arc (refer to Figure 10-11 The outer contour of the boss 24 can be circular, rectangular, elliptical or other irregular shapes.

[0125] When the central axis of the second exhaust channel 241 is a straight line, the entire second exhaust channel 241 can be cylindrical, truncated, prism-shaped, or truncated pyramid-shaped. In this case, the exhaust from the battery cells 20 can be discharged in a straight line. When the central axis of the second exhaust channel 241 is an arc, the boss 24 can be in the shape of a curved tube. In this case, the exhaust from the battery cells 20 can be discharged along the direction of the arc. The specific bending length of the boss 24 can be adjusted as needed.

[0126] According to some embodiments of the present application, referring to Figure 5 The housing 21 further includes a second wall 212 , which is disposed opposite to the first wall 211 along a thickness direction of the first wall 211 .

[0127] The battery cell 20 further includes an electrode terminal 22 . The electrode terminal 22 is disposed on the second wall 212 . The electrode terminal 22 is electrically connected to the electrode assembly.

[0128] The electrode terminals 22 and the bosses 24 are disposed opposite to each other on both sides of the battery cell 20 to facilitate arrangement of the battery cell 20 in the battery device 100 .

[0129] According to some embodiments of the present application, the present application further provides a battery device 100 including the battery cell 20 of any of the above solutions.

[0130] According to some embodiments of the present application, referring to Figure 12 The first box member 30 is further provided with a through hole 31 communicating with the first exhaust passage 32 , and the boss 24 can be inserted into the first exhaust passage 32 through the through hole 31 .

[0131] By allowing the bosses 24 of the battery cells 20 to be inserted into the first exhaust passages 32 through the vias 31, exhaust from the battery cells 20 can be discharged directly into the first exhaust passages 32. This reduces contact between exhaust from the battery cells 20 and surrounding metal surfaces, lowering the possibility of short circuits or insulation failures, thereby improving the reliability of the battery device 100. Exhaust that enters the first exhaust passages 32 is discharged out of the battery device 100 through the first exhaust passages 32.

[0132] According to some embodiments of the present application, the present application further provides an energy storage device 200, comprising the battery device 100 of any of the above solutions.

[0133] According to some embodiments of the present application, see Figure 4 、 Figure 7 and Figure 12 The present application provides a battery device 100 , wherein a first box member 30 and a battery cell 20 are disposed in a box body 10 , and a through hole 31 and a first exhaust channel 32 are provided on the first box member 30 .

[0134] The battery cell 20 includes a housing 21 , electrode terminals 22 , an electrode assembly, and a pressure relief mechanism 23 . The electrode assembly is disposed in the housing 21 . The housing 21 includes a first wall 211 and a second wall 212 . The second wall 212 is disposed opposite to the first wall 211 along the thickness direction of the first wall 211 .

[0135] The pressure relief mechanism 23 is disposed on the first wall 211. A boss 24 is provided on the outer surface of the first wall 211. The boss 24 is an insulating member and can be inserted into the first exhaust channel 32 through the via 31. A second exhaust channel 241 is provided within the boss 24, communicating with the first exhaust channel 32. The cross-sectional shape of the second exhaust channel 241 matches that of the pressure relief mechanism 23, and the cross-sectional area of ​​the second exhaust channel 241 is no less than that of the pressure relief mechanism 23. The second exhaust channel 241 is used to guide exhaust from the battery cells 20 to the first exhaust channel 32 when the pressure relief mechanism 23 is activated.

[0136] The electrode terminal 22 is disposed on the second wall 212 , and the electrode terminal 22 is electrically connected to the electrode assembly.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body includes a first box body component, wherein a first exhaust passage is provided inside the first box body component; as well as A battery cell is disposed in the box, the battery cell comprising a housing, an electrode assembly, and a pressure relief mechanism, the electrode assembly is disposed in the housing, and the housing comprises a first wall; The outer surface of the first wall is provided with a boss, the interior of the boss is provided with a second exhaust channel, the boss is at least partially inserted into the first exhaust channel, and the second exhaust channel is communicated with the first exhaust channel; The pressure relief mechanism is disposed in the second exhaust channel or on the first wall. The second exhaust channel is used to guide the exhaust of the battery cells to be discharged into the first exhaust channel when the pressure relief mechanism is opened.

2. The battery device according to claim 1, wherein: The boss is an insulating member.

3. The battery device according to claim 1, wherein: An insulating layer is provided on the inner wall of the second exhaust channel.

4. The battery device according to claim 3, characterized in that All surfaces of the boss are provided with the insulating layer.

5. The battery device according to claim 1, wherein: The boss is integrally formed with the first wall.

6. The battery device according to claim 1, wherein: The boss is formed separately from the first wall, and the boss is connected to the first wall.

7. The battery device according to claim 1, wherein: The pressure relief mechanism is provided on the first wall; The battery cell further includes an insulating sheet connected to the outer surface of the first wall, and the insulating sheet is provided with a through hole opposite to the pressure relief mechanism; The boss is arranged on a side of the insulating sheet facing away from the first wall, and the second exhaust channel is communicated with the through hole.

8. The battery device according to claim 7, characterized in that The boss and the insulating sheet are integrally formed.

9. The battery device according to claim 1, wherein: The shape of the cross section of the second exhaust channel matches the shape of the pressure relief mechanism, and the cross-sectional area of ​​the second exhaust channel is not less than the cross-sectional area of ​​the pressure relief mechanism.

10. The battery device according to claim 1, wherein: The central axis of the second exhaust channel is a straight line or an arc.

11. The battery device according to any one of claims 1 to 10, characterized in that: The housing further includes a second wall, which is arranged opposite to the first wall along the thickness direction of the first wall; The battery cell further includes an electrode terminal, which is disposed on the second wall and is electrically connected to the electrode assembly.

12. The battery device according to any one of claims 1 to 10, characterized in that: The first box component is further provided with a through hole communicating with the first exhaust channel, and the boss is inserted into the first exhaust channel through the through hole.

13. An energy storage device, characterized in that: A battery device comprising the battery device according to any one of claims 1 to 12.

14. An energy storage system, characterized in that: It comprises an energy storage and flow conversion device and the energy storage device as claimed in claim 13, wherein the energy storage and flow conversion device is used to electrically connect a power generation device and the energy storage device.

15. A charging network, characterized in that: It comprises a charging pile and an energy storage device as claimed in claim 13, wherein the energy storage device is used to provide electrical energy for the charging pile.

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