Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises a battery cell assembly, a frame, a protective plate and a blocking assembly. The battery cell assembly comprises a plurality of battery cells. The frame comprises two first walls and two second walls. The two first walls are arranged at intervals along a first direction, and the two second walls are arranged at intervals along a second direction. The first walls are connected with the second walls. The battery cell assembly is located between the two first walls and between the two second walls. The protective plate is located on one side of the battery cell assembly along a third direction. The side of the battery cell assembly facing the protective plate is provided with a pressure relief mechanism. A gap is formed between the protective plate and the frame. The first direction, the second direction and the third direction are perpendicular to each other. The blocking assembly at least partially blocks the gap. The technical scheme provided by the application can effectively improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, how to improve the reliability of battery devices is a technical problem that urgently needs to be solved. Utility Model Content

[0004] This application provides a battery device and an electrical device, and the technical solution provided by this application can effectively improve the reliability of the battery device.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, some embodiments of this application provide a battery device, which includes a battery cell assembly, a frame, a protective plate, and a sealing assembly. The battery cell assembly includes multiple battery cells. The frame includes two first walls and two second walls, the two first walls being spaced apart along a first direction, and the two second walls being spaced apart along a second direction. The first walls are connected to the second walls, and the battery cell assembly is located between the two first walls and between the two second walls. The protective plate is located on one side of the battery cell assembly along a third direction, and a pressure relief mechanism is provided on the side of the battery cell facing the protective plate, with a gap formed between the protective plate and the frame. The first direction, the second direction, and the third direction are mutually perpendicular. The sealing assembly at least partially seals the gap.

[0007] In the battery device provided above, a protective plate is provided on one side of the battery cell assembly along the third direction, which can block the high-temperature and high-pressure substances ejected by the pressure relief mechanism, reduce the impact of high-temperature and high-pressure substances on the outside of the battery device or on adjacent battery devices. By setting a sealing component to seal the gap formed between the protective plate and the frame, the risk of high-temperature and high-pressure substances leaking from the gap to the outside of the battery device and affecting adjacent battery devices, causing thermal runaway of the battery device, can be effectively reduced, which is conducive to improving the reliability of the battery device.

[0008] According to some embodiments of this application, the gap includes a first gap formed between the protective plate and the first wall, and the sealing assembly includes a first sealing member that at least partially seals the first gap.

[0009] In the above solution, the first sealing component at least partially seals the first gap, which can effectively reduce the risk of high-temperature and high-pressure substances ejected from the battery cell leaking through the first gap, reduce the risk of thermal runaway of adjacent battery devices due to the leakage of high-temperature and high-pressure substances, and make the battery device highly reliable.

[0010] According to some embodiments of this application, the first sealing element connects the protective plate and the first wall.

[0011] In the above scheme, the first sealing component connects the protective plate and the first wall, so that there is a stable connection between the protective plate and the first wall. On the one hand, it reduces the risk of separation between the protective plate and the first wall, and on the other hand, it can effectively withstand the impact generated by the high temperature and high pressure substances when they are ejected, thereby improving the protective effect of the protective plate and the first sealing component, and thus making the battery device highly reliable.

[0012] According to some embodiments of this application, the first sealing element is bonded to the protective plate and the first wall, respectively.

[0013] In the above scheme, the first sealing component is bonded to the protective plate and the first wall respectively, which makes the assembly difficulty between the first sealing component, the protective plate and the first wall low and is conducive to improving the manufacturing efficiency of the battery device.

[0014] According to some embodiments of this application, the first sealing member includes a first connecting portion and a second connecting portion that are interconnected. The first connecting portion is connected to the side of the protective plate opposite to the battery cell assembly, and the second connecting portion is connected to the side of the first wall opposite to the battery cell assembly.

[0015] In the above scheme, the first connecting part is connected to the outside of the protective plate, and the second connecting part is connected to the outside of the first wall. On the one hand, it can effectively connect the protective plate and the first wall, so that the protective plate and the first wall have good connection quality; on the other hand, it can effectively seal the first gap, reduce the risk of high temperature and high pressure materials leaking from the first gap, and help improve the reliability of the battery device.

[0016] According to some embodiments of this application, the first sealing element is an insulating composite tape.

[0017] In the above scheme, the first sealing component is an insulating composite tape, which has good insulation properties to reduce the risk of short circuit inside the battery device caused by the diffusion of high temperature and high pressure substances to the first sealing component.

[0018] According to some embodiments of this application, the first sealing element is a ceramic composite strip.

[0019] In the above scheme, the first sealing component is a ceramic composite strip, which has strong corrosion resistance and high strength. It can effectively seal the first gap and withstand the impact of high temperature and high pressure substances, which is conducive to improving the reliability of the battery device.

[0020] According to some embodiments of this application, the gap includes a second gap formed between the protective plate and the second wall, and the sealing assembly includes a second sealing member that at least partially seals the second gap.

[0021] In the above solution, the second sealing component at least partially blocks the second gap, which can effectively reduce the risk of high-temperature and high-pressure substances ejected from the battery cell leaking through the second gap, reduce the risk of thermal runaway of adjacent battery devices due to the leakage of high-temperature and high-pressure substances, and make the battery device highly reliable.

[0022] According to some embodiments of this application, the second sealing member includes a third connecting portion and a fourth connecting portion that are interconnected. Along a second direction, the third connecting portion is located on one side of the battery cell assembly, and along a third direction, at least a portion of the fourth connecting portion is located between the protective plate and the battery cell assembly.

[0023] In the above solution, the second sealing component includes a third connecting part and a fourth connecting part that are connected to each other. The third connecting part is located on one side of the battery cell assembly along the second direction, and the fourth connecting part is located between the protective plate and the battery cell assembly along the third direction. This can effectively prevent high-temperature and high-pressure substances from leaking out through the second gap, reduce the risk of thermal runaway caused by the leaked high-temperature and high-pressure substances in adjacent battery devices, and make the battery device highly reliable.

[0024] According to some embodiments of this application, the material of the second sealing element is mica.

[0025] In the above scheme, the second sealing component is made of mica, which can effectively withstand the impact of high-temperature and high-pressure substances, reduce the risk of leakage of high-temperature and high-pressure substances, and make the battery device highly reliable.

[0026] According to some embodiments of this application, the protective plate is made of mica.

[0027] In the above scheme, the protective plate is made of mica, which can effectively withstand the impact of high-temperature and high-pressure substances, reduce the risk of leakage of high-temperature and high-pressure substances, and make the battery device highly reliable.

[0028] According to some embodiments of this application, the gap includes a first gap formed between the protective plate and the first wall, and the sealing assembly includes a first sealing member that at least partially seals the first gap, and the first sealing member connects the protective plate and the second sealing member.

[0029] In the above solution, the first sealing component at least partially seals the first gap, which can effectively reduce the risk of high-temperature and high-pressure substances ejected from the battery cell leaking through the first gap, and reduce the risk of thermal runaway of adjacent battery devices due to the leakage of high-temperature and high-pressure substances, thus making the battery device highly reliable. At the same time, the first sealing component connects to the protective plate and the second sealing component, which can integrate the first sealing component, the protective plate, and the second sealing component into one unit, which together play a role in protecting against high-temperature and high-pressure substances, reducing the risk of leakage of high-temperature and high-pressure substances, and making the battery device highly reliable.

[0030] According to some embodiments of this application, the second sealing member includes a fourth connecting portion along a third direction, a portion of the fourth connecting portion being located between the protective plate and the battery cell assembly, and the first sealing member being bonded to another portion of the fourth connecting portion and the protective plate respectively.

[0031] In the above solution, the second sealing component includes a fourth connecting part. A portion of the fourth connecting part is disposed between the protective plate and the battery cell assembly. The first sealing component adheres to another portion of the fourth connecting part and the protective plate. On the one hand, this allows a portion of the second sealing component to overlap with the protective plate, effectively sealing the second gap. On the other hand, it facilitates the first sealing component to connect the second sealing component and the protective plate into a whole, jointly protecting against high-temperature and high-pressure substances, reducing the risk of leakage of high-temperature and high-pressure substances, and making the battery device highly reliable.

[0032] According to some embodiments of this application, the battery device further includes an insulating plate located between the battery cell assembly and the protective plate, and a busbar is provided on the insulating plate for electrical connection with the battery cell.

[0033] In the above scheme, the battery device also includes an insulating plate with a current-combining component. The current-combining component can electrically connect adjacent battery cells, enabling the battery device to have a higher voltage to meet power supply requirements.

[0034] According to some embodiments of this application, a positioning groove is formed on one side of the protective plate along a first direction, and the positioning groove penetrates the protective plate along a third direction. Along the third direction, a protrusion is formed on the side of the insulating plate opposite to the battery cell assembly, and the protrusion is at least partially disposed in the positioning groove.

[0035] In the above scheme, a positioning groove is provided on one side of the protective plate along the first direction, and a protrusion is provided on the insulating plate, which can realize the positioning constraint of the protective plate and the insulating plate in the first and second directions, which is conducive to improving the assembly efficiency of the battery device.

[0036] According to some embodiments of this application, the protective plate has positioning grooves formed on both sides along the first direction, and the insulating plate has protrusions corresponding to the positioning grooves on the side opposite to the battery cell assembly.

[0037] In the above scheme, by setting positioning grooves on both sides of the protective plate along the first direction and setting corresponding protrusions on the insulating plate, the positioning constraints of the protective plate and the insulating plate in the first and second directions can be further realized, so that the battery device has high assembly efficiency.

[0038] According to some embodiments of this application, a plurality of battery cells in a battery cell assembly are arranged along a second direction, which is perpendicular to the surface of the battery cell with the largest area.

[0039] Secondly, some embodiments of this application provide an electrical device, which includes the battery device provided in the first aspect.

[0040] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of a vehicle in some embodiments of this application;

[0043] Figure 2 This is an exploded perspective view of the battery pack in some embodiments of this application;

[0044] Figure 3 This is a perspective view of the battery device in some embodiments of this application;

[0045] Figure 4 This is an exploded perspective view of a battery device according to some embodiments of this application;

[0046] Figure 5 This is a top view of the battery device in some embodiments of this application;

[0047] Figure 6 for Figure 5 Sectional view along the AA direction;

[0048] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0049] Figure 8 This is a magnified view of point C in section 4;

[0050] Figure 9 for Figure 4Enlarged view of point D in the middle.

[0051] Icons: 1000 - Vehicle; 100 - Battery Unit; 200 - Controller; 300 - Motor; 400 - Battery Pack; 401 - Housing; 402 - First Housing Body; 403 - Second Housing Body; 10 - Battery Cell Assembly; 11 - Battery Cell; 20 - Frame; 21 - First Wall; 22 - Second Wall; 30 - Protective Plate; 31 - Positioning Groove; 32 - Body; 33 - Protrusion; 40 - Sealing Assembly; 41 - First Sealing Member; 410 - First Connecting Part; 411 - Second Connecting Part; 42 - Second Sealing Member; 420 - Third Connecting Part; 421 - Fourth Connecting Part; 50 - Insulating Plate; 51 - Protrusion; 60 - Insulating Cover; x - First Direction; y - Second Direction; z - Third Direction. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] In this application, "multiple" means two or more (including two).

[0059] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0060] The battery cell 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.

[0061] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include, but are not limited to, square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0062] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity.

[0063] In some embodiments, the battery device may be a battery module. Exemplarily, the battery device includes a battery cell assembly, end plates, and side plates, with two end plates located at both ends of the battery cell assembly and two side plates located on both sides of the battery cell assembly and respectively connected to the two end plates.

[0064] A battery cell assembly may include multiple battery cells, which are connected in series, parallel or mixed via a busbar.

[0065] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0066] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing. Alternatively, the battery device may be a battery pack, which includes a housing and one or more battery cells housed within the housing. Alternatively, the battery pack may include a housing and battery modules housed within the housing.

[0067] As an example, the enclosure may include a first enclosure body and a second enclosure body. The first enclosure body and the second enclosure body are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, which can be either sealed or unsealed. The first enclosure body may be a top cover or a bottom plate.

[0068] 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.

[0069] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0070] In some embodiments, the battery device may be an energy storage device, which includes a housing with a door on at least one side. The energy storage device may include an energy storage container, an energy storage cabinet, etc. In some embodiments, one or more energy storage devices may constitute at least part of an energy storage system.

[0071] Battery devices possess outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide applicability, and low self-discharge coefficient, making them an important component of today's new energy development. The development of battery technology must simultaneously consider multiple design factors, such as performance parameters like energy density, cycle life, and discharge capacity. Furthermore, the reliability of the battery device must also be taken into account.

[0072] Generally, in battery device design, a mica plate is placed above the battery cell assembly to block the high-temperature and high-pressure substances ejected by the pressure relief mechanism, thereby reducing the risk of high-temperature and high-pressure substances spreading to adjacent battery devices and causing thermal diffusion.

[0073] In related battery devices, individual battery cells are housed within a frame, with mica sheets secured to the frame via clips or other structures. However, mica sheets are difficult to mold and are typically plate-like, making it impossible to achieve a tight fit between the mica sheet and the frame, resulting in gaps. Substances ejected by the pressure relief mechanism can leak through these gaps, affecting adjacent battery cells and causing heat diffusion, ultimately leading to low reliability of the battery device.

[0074] In view of this, to improve the problem of thermal runaway of the battery device caused by leakage of high-temperature and high-pressure substances ejected by the pressure relief mechanism through the gap between the mica plate and the frame, this application provides a battery device with some embodiments. The battery device includes a battery cell assembly, a frame, a protective plate, and a sealing assembly. The battery cell assembly includes multiple battery cells. The frame includes two first walls and two second walls, the two first walls are spaced apart along a first direction, and the two second walls are spaced apart along a second direction. The first walls and the second walls are connected. The battery cell assembly is located between the two first walls and between the two second walls. The protective plate is located on one side of the battery cell assembly along a third direction. A pressure relief mechanism is provided on the side of the battery cell facing the protective plate, and a gap is formed between the protective plate and the frame. The first direction, the second direction, and the third direction are perpendicular to each other. The sealing assembly at least partially seals the gap.

[0075] In the battery device provided above, a protective plate is provided on one side of the battery cell assembly along the third direction, which can block the high-temperature and high-pressure substances ejected by the pressure relief mechanism, reduce the impact of high-temperature and high-pressure substances on the outside of the battery device or on adjacent battery devices. By setting a sealing component to seal the gap formed between the protective plate and the frame, the risk of high-temperature and high-pressure substances leaking from the gap to the outside of the battery device and affecting adjacent battery devices, causing thermal runaway of the battery device, can be effectively reduced, which is conducive to improving the reliability of the battery device.

[0076] The battery devices disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft.

[0077] The technical solutions described in the embodiments of this application are applicable to battery devices, energy storage devices using battery devices, and electrical devices using battery devices.

[0078] Energy storage devices may include energy storage containers, energy storage cabinets, etc. For example, an energy storage cabinet may include a cabinet and one or more battery modules and / or battery devices mounted on the cabinet.

[0079] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be new energy vehicles, including pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The electrical devices in the embodiments of this application include, but are not limited to, those mentioned above.

[0080] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0081] Figure 1 This is a schematic diagram of vehicle 1000 in some embodiments of this application.

[0082] The electrical device is a vehicle 1000. Inside the vehicle 1000, a controller 200, a motor 300, and a battery device 100 can be installed. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0083] Please refer to Figure 2 , Figure 2 This is an exploded perspective view of the battery pack 400 in some embodiments of this application.

[0084] Figure 2 In this context, the battery device 100 is a battery pack 400, which includes a housing 401 and individual battery cells 11, with the individual battery cells 11 housed within the housing 401.

[0085] The housing 401 provides assembly space for the battery cell 11, and can adopt various structures. In some embodiments, the housing 401 may include a first housing body 402 and a second housing body 403, which overlap each other, and together define an assembly space for accommodating the battery cell 11. The second housing body 403 may be a hollow structure open at one end, and the first housing body 402 may be a plate-like structure, with the first housing body 402 covering the open side of the second housing body 403 so that the first housing body 402 and the second housing body 403 together define the assembly space; alternatively, the first housing body 402 and the second housing body 403 may both be hollow structures open on one side, with the open side of the first housing body 402 covering the open side of the second housing body 403.

[0086] Of course, the box 401 formed by the first box body 402 and the second box body 403 can be of various shapes, such as cylinder, cuboid or cube.

[0087] In the battery pack 400, there can be one or more battery cells 11 disposed within the housing 401. When there are multiple battery cells 11 disposed within the housing 401, the multiple battery cells 11 can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that some of the multiple battery cells 11 are connected in series and others in parallel. The multiple battery cells 11 can be directly connected in series, in parallel, or in a mixed configuration together, and then the entire assembly of the multiple battery cells 11 is housed within the housing 401. For example, the multiple battery cells 11 constitute a battery cell assembly 10 and are housed within the housing 401.

[0088] The battery device 100 includes a battery cell assembly 10, which includes multiple battery cells 11. Each battery cell 11 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 11 can be in the form of a cuboid, cylinder, prism, or other shapes.

[0089] Optionally, the battery pack 400 includes a housing 401 and a battery module, the battery module being housed within the housing 401.

[0090] Some embodiments of this application provide a battery device 100; please refer to [link to relevant documentation]. Figure 3 and Figure 4 , Figure 3 This is a perspective view of the battery device 100 in some embodiments of this application. Figure 4 This is an exploded perspective view of a battery device 100 according to some embodiments of this application.

[0091] The battery assembly 100 includes a battery cell assembly 10, a frame 20, a protective plate 30, and a sealing assembly 40. The battery cell assembly 10 includes multiple battery cells 11. The frame 20 includes two first walls 21 and two second walls 22. The two first walls 21 are spaced apart along a first direction x, and the two second walls 22 are spaced apart along a second direction y. The first walls 21 and second walls 22 are connected. The battery cell assembly 10 is located between the two first walls 21 and between the two second walls 22. The protective plate 30 is located on one side of the battery cell assembly 10 along a third direction z. A pressure relief mechanism is provided on the side of the battery cells 11 facing the protective plate 30, and a gap is formed between the protective plate 30 and the frame 20. The first direction x, the second direction y, and the third direction z are all perpendicular to each other. The sealing assembly 40 at least partially seals the gap.

[0092] Optionally, the battery device 100 in some embodiments of this application may be a battery module.

[0093] The battery cell assembly 10 includes multiple battery cells 11.

[0094] Optionally, the multiple battery cells 11 can be arranged along the first direction x.

[0095] Optionally, multiple battery cells 11 can be arranged along the second direction y.

[0096] In some embodiments, a pressure relief mechanism may be provided on one side of the battery cell 11 along the third direction z. The pressure relief mechanism may be a pressure relief valve, pressure relief groove, or other component provided on the wall of the outer casing of the battery cell 11 for releasing the internal pressure of the battery cell 11, that is, for releasing the high temperature and high pressure material inside the battery cell 11.

[0097] The first direction x, the second direction y, and the third direction z are all mutually perpendicular. For example, the first direction x can be the width direction of the battery cell 11, the second direction y can be the thickness direction of the battery cell 11, and the third direction z can be the height direction of the battery cell 11. In some embodiments, the pressure relief mechanism can be disposed on the top wall of the housing of the battery cell 11.

[0098] The frame 20 can be a structural component for constraining and securing the battery cell assembly 10. The frame 20 includes two first walls 21 and two second walls 22. The two first walls 21 are spaced apart along a first direction x, and the two second walls 22 are spaced apart along a second direction y. The first walls 21 and the second walls 22 are connected to form a receiving cavity, in which the battery cell assembly 10 is located.

[0099] The connection between the first wall 21 and the second wall 22 can be varied, including but not limited to bonding, welding, riveting, or threaded connection.

[0100] In some embodiments, the first wall 21 can be a side plate, and the second wall 22 can be an end plate. In other embodiments, the first wall 21 can be an end plate, and the second wall 22 can be a side plate.

[0101] The protective plate 30 is located on the side of the battery cell assembly 10 along the third direction z, and the pressure relief mechanism of the battery cell 11 is arranged facing the protective plate 30 so that the high temperature and high pressure material ejected by the pressure relief mechanism can be blocked by the protective plate 30, so that the protective plate 30 plays a protective role.

[0102] For example, the protective plate 30 is disposed above the battery cell assembly 10.

[0103] The protective plate 30 can be made of a material that is resistant to high temperatures and has a certain strength. For example, the protective plate 30 can be a mica plate.

[0104] A gap is formed between the protective plate 30 and the frame 20. The gap can refer to the fact that high-temperature and high-pressure substances ejected from the pressure relief mechanism, after being blocked by the protective plate 30, can leak to the outside of the battery device 100 through the gap.

[0105] Optionally, a first gap is formed between the protective plate 30 and the first wall 21. High-temperature and high-pressure substances are ejected by the pressure relief mechanism, blocked by the protective plate 30, diffuse along the first direction x, and leak outward through the first gap.

[0106] Optionally, a second gap is formed between the protective plate 30 and the second wall 22. High-temperature and high-pressure substances are ejected by the pressure relief mechanism, blocked by the protective plate 30, diffuse along the second direction y, and leak outward through the first gap.

[0107] Optionally, a first gap is formed between the protective plate 30 and the first wall 21, and a second gap is formed between the protective plate 30 and the second wall 22.

[0108] For example, the battery device 100 further includes an insulating plate 50, which is disposed on one side of the battery cell assembly 10 along the third direction z. A busbar component may be provided on the insulating plate 50 to achieve electrical connection between the battery cells 11. Correspondingly, a through hole corresponding to the pressure relief mechanism is provided on the insulating plate 50. A protective plate 30 may be disposed on the insulating plate 50. A first gap is formed between the edge of the protective plate 30 along the first direction x and the end of the first wall 21 along the third direction z, and a second gap is formed between the edge of the protective plate 30 along the second direction y and the end of the second wall 22 along the third direction z.

[0109] The sealing component 40 is a structural component used to at least partially seal the gap, thereby preventing high-temperature and high-pressure substances from leaking out of the gap to a certain extent.

[0110] Optionally, the sealing assembly 40 can completely or partially seal the first gap to mitigate the risk of leakage of high-temperature, high-pressure substances through the first gap. Optionally, the sealing assembly 40 can completely or partially seal the second gap to mitigate the risk of leakage of high-temperature, high-pressure substances through the second gap. Optionally, the sealing assembly 40 can completely or partially seal both the first and second gaps.

[0111] For example, the sealing assembly 40 includes a first sealing member 41 and a second sealing member 42, the first sealing member 41 being used to seal a first gap and the second sealing member 42 being used to seal a second gap.

[0112] In some embodiments, the sealing component 40 may be connected to the frame 20, for example, the sealing component 40 may be connected to the first wall 21. The connection between the sealing component 40 and the frame 20 is varied, including but not limited to adhesive, snap-fit, riveting, or threaded connection.

[0113] In some embodiments, the sealing component 40 can be connected to the protective plate 30, for example, the sealing component 40 can be connected to the side of the protective plate 30 opposite to the battery cell assembly 10. The connection relationship between the sealing component 40 and the protective plate 30 is diverse, including but not limited to adhesive bonding, snap-fitting, riveting, or threaded connection.

[0114] In the battery device 100 provided above, a protective plate 30 is provided on one side of the battery cell assembly 10 along the third direction z. This plate can block the high-temperature and high-pressure substances ejected by the pressure relief mechanism, reducing the impact of the high-temperature and high-pressure substances on the outside of the battery device 100 or on adjacent battery devices 100. By providing a sealing component 40 to seal the gap formed between the protective plate 30 and the frame 20, the risk of high-temperature and high-pressure substances leaking from the gap to the outside of the battery device 100 and affecting adjacent battery devices 100, causing thermal runaway of the battery device 100, can be effectively reduced, which is beneficial to improving the reliability of the battery device 100.

[0115] According to some embodiments of this application, the gap includes a first gap formed between the protective plate 30 and the first wall 21, and the sealing assembly 40 includes a first sealing member 41, which at least partially seals the first gap.

[0116] A first gap is formed between the protective plate 30 and the first wall 21, which can be understood as allowing high-temperature and high-pressure substances to leak to the outside through the gap between the protective plate 30 and the first wall 21.

[0117] The sealing assembly 40 includes a first sealing element 41, which is used to seal the first gap. Part or all of the first sealing element 41 can provide a certain degree of sealing effect on the first gap.

[0118] For example, a portion of the first sealing member 41 blocks the first gap, and the remaining portion of the first sealing member 41 may be disposed in other locations, such as other portions of the first sealing member 41 may be used to connect the first wall 21, the protective plate 30 and / or other structures.

[0119] The material of the first sealing component 41 can be mica or other insulating materials.

[0120] For example, the first sealing element 41 can be an insulating composite tape. Alternatively, the first sealing element 41 can be a ceramic composite tape, a fiberglass composite tape, etc.

[0121] In the above scheme, the first sealing component 41 at least partially seals the first gap, which can effectively reduce the risk of high-temperature and high-pressure substances ejected from the battery cell 11 leaking through the first gap, reduce the risk of thermal runaway of the adjacent battery device 100 due to the leakage of high-temperature and high-pressure substances, and make the battery device 100 highly reliable.

[0122] According to some embodiments of this application, the first sealing member 41 connects the protective plate 30 and the first wall 21.

[0123] In some embodiments, the first sealing member 41 connects the protective plate 30 and the first wall 21.

[0124] Optionally, the first sealing member 41 is connected to the surface of the protective plate 30 away from the surface of the battery cell assembly 10, and the first sealing member 41 is connected to the surface of the first wall 21 away from the surface of the battery cell assembly 10.

[0125] Optionally, the first sealing member 41 is connected to the end face of the protective plate 30 along the first direction x, and the first sealing member 41 is connected to the surface of the first wall 21 opposite to the battery cell assembly 10.

[0126] The connection between the first sealing element 41 and the protective plate 30 can be varied, including but not limited to adhesive bonding, riveting, snap-fitting, or threaded connection. For example, the first sealing element 41 and the protective plate 30 are connected by an adhesive, such as polycarbonate adhesive.

[0127] The connection between the first sealing element 41 and the first wall 21 can be varied, including but not limited to adhesive, riveting, snap-fit, or threaded connection. For example, the first sealing element 41 and the first wall 21 are connected by an adhesive, such as polycarbonate adhesive.

[0128] In the above scheme, the first sealing component 41 connects the protective plate 30 and the first wall 21, so that the protective plate 30 and the first wall 21 have a stable connection relationship. On the one hand, it reduces the risk of separation between the protective plate 30 and the first wall 21, and on the other hand, it can effectively withstand the impact generated when high temperature and high pressure substances are ejected, improve the protective effect of the protective plate 30 and the first sealing component 41, and thus make the battery device 100 highly reliable.

[0129] According to some embodiments of this application, the first sealing element 41 is bonded to the protective plate 30 and the first wall 21 respectively.

[0130] In some embodiments, the first sealing element 41 is bonded to the protective plate 30 and the first wall 21.

[0131] For example, the first sealing member 41 includes a first connecting portion 410 and a second connecting portion 411 that are connected to each other. The first connecting portion 410 is bent relative to the second connecting portion 411. The first connecting portion 410 is bonded to the surface of the protective plate 30 away from the battery cell assembly 10, and the second connecting portion 411 is bonded to the surface of the first wall 21 away from the battery cell assembly 10.

[0132] Optionally, the first sealing element 41 is bonded to the protective plate 30 and the first wall 21 by polycarbonate adhesive.

[0133] In the above scheme, the first sealing component 41 is bonded to the protective plate 30 and the first wall 21 respectively, which makes the assembly difficulty between the first sealing component 41, the protective plate 30 and the first wall 21 low and is conducive to improving the manufacturing efficiency of the battery device 100.

[0134] Based on some embodiments of this application, please refer to... Figure 3 and Figure 4 The first sealing member 41 includes a first connecting part 410 and a second connecting part 411 that are connected to each other. The first connecting part 410 is connected to the side of the protective plate 30 away from the battery cell assembly 10, and the second connecting part 411 is connected to the side of the first wall 21 away from the battery cell assembly 10.

[0135] The first sealing member 41 includes a first connecting portion 410 and a second connecting portion 411. The first connecting portion 410 is bent relative to the second connecting portion 411 along a third direction z. The first connecting portion 410 is located on the side of the protective plate 30 away from the battery cell assembly 10 along a first direction x. The second connecting portion 411 is located on the side of the first wall 21 away from the battery cell assembly 10, so that the first sealing member 41 can seal the first gap and simultaneously connect the protective plate 30 and the first wall 21.

[0136] In the above scheme, the first connecting part 410 is connected to the outer side of the protective plate 30, and the second connecting part 411 is connected to the outer side of the first wall 21. On the one hand, it can effectively connect the protective plate 30 and the first wall 21, so that the protective plate 30 and the first wall 21 have good connection quality; on the other hand, it can effectively seal the first gap, reduce the risk of high temperature and high pressure materials leaking from the first gap, and help improve the reliability of the battery device 100.

[0137] Optionally, in some other embodiments, the first sealing member 41 is plate-shaped or sheet-shaped, and along the first direction x, the side of the first sealing member 41 facing the battery cell assembly 10 is connected to the end face of the protective plate 30 and the outer side of the first wall 21, respectively.

[0138] According to some embodiments of this application, the first sealing element 41 is an insulating composite tape.

[0139] For example, the first sealing element 41 is a ceramic composite strip, a fiberglass composite strip, etc.

[0140] Ceramic composite tapes can include a tape-like composite structure of glass fiber and ceramic silicone.

[0141] Fiberglass composite tape can be a strip structure made of high-temperature resistant and high-strength glass fiber and other insulating materials through special processes.

[0142] Optionally, the insulating composite tape is provided with an adhesive layer, which is connected to the first wall 21 and the protective plate 30.

[0143] In some embodiments, the first sealing element 41 may be an insulating composite tape.

[0144] In the above scheme, the first sealing component 41 is an insulating composite tape, which has good insulation and corrosion resistance, can effectively seal the first gap and withstand the impact of high temperature and high pressure substances, which is conducive to improving the reliability of the battery device 100.

[0145] According to some embodiments of this application, the first sealing element 41 is a ceramic composite strip.

[0146] In the above scheme, the first sealing component 41 is a ceramic composite strip, which has strong corrosion resistance and high strength. It can effectively seal the first gap and withstand the impact of high temperature and high pressure substances, which is conducive to improving the reliability of the battery device 100.

[0147] According to some embodiments of this application, the gap includes a second gap formed between the protective plate 30 and the second wall 22, and the sealing assembly 40 includes a second sealing member 42, which at least partially seals the second gap.

[0148] A second gap is formed between the protective plate 30 and the second wall 22, which can be understood as allowing high-temperature and high-pressure substances to leak to the outside through the gap between the protective plate 30 and the second wall 22.

[0149] The sealing assembly 40 includes a second sealing element 42, which is used to seal the second gap. Part or all of the second sealing element 42 can provide a certain degree of sealing effect on the second gap.

[0150] For example, a portion of the second sealing member 42 blocks the second gap, and the remaining portion of the second sealing member 42 may be disposed in other locations, such as other portions of the second sealing member 42 may be used to connect the first wall 21, the protective plate 30 and / or other structures.

[0151] Optionally, the second sealing element 42 can be an insulating composite tape, such as a ceramic composite tape or a fiberglass composite tape.

[0152] Optionally, the material of the second sealing element 42 can be mica.

[0153] In some embodiments, the second sealing member 42 may be connected to the second wall 22, for example by bonding, welding, riveting, snap-fitting, or threaded connection.

[0154] In some embodiments, the second sealing member 42 may be connected to the protective plate 30, for example by adhesive bonding, riveting, snap-fitting, or threaded connection.

[0155] In some embodiments, the second sealing member 42 may be connected to the first sealing member 41, for example by bonding, welding, riveting, snap-fitting, or threaded connection.

[0156] In the above scheme, the second sealing component 42 at least partially seals the second gap, which can effectively reduce the risk of high-temperature and high-pressure substances ejected from the battery cell 11 leaking through the second gap, reduce the risk of thermal runaway of the adjacent battery device 100 due to the leakage of high-temperature and high-pressure substances, and make the battery device 100 highly reliable.

[0157] According to some embodiments of this application, please refer to Figure 3 and Figure 4 The second sealing member 42 includes a third connecting portion 420 and a fourth connecting portion 421 that are interconnected. Along the second direction y, the third connecting portion 420 is located on one side of the battery cell assembly 10, and along the third direction z, at least a portion of the fourth connecting portion 421 is located between the protective plate 30 and the battery cell assembly 10.

[0158] The second sealing member 42 includes a third connecting portion 420 and a fourth connecting portion 421, with the third connecting portion 420 bent into the fourth connecting portion 421. Along the second direction y, the third connecting portion 420 is located on one side of the battery cell assembly 10, and along the third direction z, the fourth connecting portion 421 is at least partially located between the protective plate 30 and the battery cell assembly 10.

[0159] Exemplarily, the battery device 100 further includes an insulating plate 50 and an insulating cover 60. The insulating plate 50 is disposed on one side of the battery cell assembly 10 along the third direction z, and a busbar member is disposed on the insulating plate 50 for electrically connecting the battery cell 11. The insulating cover 60 covers the battery cell 11 adjacent to the second wall 22 and covers the side of the battery cell 11 facing the second wall 22, for insulating the second wall 22 and the battery cell 11. A third connecting portion 420 is located on the side of the insulating cover 60 away from the battery cell 11, and a portion of the third connecting portion 420 is located on the side of the second wall 22 away from the battery cell 11. At least a portion of the fourth connecting portion 421 is located between the insulating plate 50 and the protective plate 30.

[0160] In the above solution, the second sealing component 42 includes a third connecting part 420 and a fourth connecting part 421 that are connected to each other. The third connecting part 420 is located on one side of the battery cell assembly 10 along the second direction y, and the fourth connecting part 421 is located between the protective plate 30 and the battery cell assembly 10 along the third direction z. This can effectively block the leakage of high-temperature and high-pressure substances through the second gap, reduce the risk of thermal runaway of the adjacent battery device 100 due to the leakage of high-temperature and high-pressure substances, and make the battery device 100 highly reliable.

[0161] According to some embodiments of this application, the material of the second sealing element 42 is mica.

[0162] In the above scheme, the second sealing component 42 is made of mica, which can effectively withstand the impact of high temperature and high pressure substances, reduce the risk of leakage of high temperature and high pressure substances, and make the battery device 100 highly reliable.

[0163] According to some embodiments of this application, the protective plate 30 is made of mica.

[0164] In the above scheme, the protective plate 30 is made of mica, which can effectively withstand the impact of high temperature and high pressure substances, reduce the risk of leakage of high temperature and high pressure substances, and make the battery device 100 highly reliable.

[0165] According to some embodiments of this application, please refer to Figures 3-7 , Figure 5 This is a top view of the battery device 100 in some embodiments of this application. Figure 6 for Figure 5 Sectional view in the middle AA direction. Figure 7 for Figure 6Enlarged view of point B in the middle.

[0166] The gap includes a first gap formed between the protective plate 30 and the first wall 21. The sealing assembly 40 includes a first sealing member 41, which at least partially seals the first gap. The first sealing member 41 connects the protective plate 30 and the second sealing member 42.

[0167] In some embodiments, the first sealing member 41 blocks the first gap, the second sealing member 42 blocks the second gap, and the first sealing member 41 connects the protective plate 30 and the second sealing member 42.

[0168] Exemplarily, the second sealing member 42 includes a third connecting portion 420 and a fourth connecting portion 421 that are bent towards each other. The third connecting portion 420 is located on one side of the battery cell assembly 10 along the second direction y, and at least a portion of the fourth connecting portion 421 is located between the battery cell assembly 10 and the protective plate 30. Optionally, a portion of the first sealing member 41 may be connected to the protective plate 30, and a portion of the first sealing member 41 may be connected to the third connecting portion 420. Optionally, a portion of the first sealing member 41 may be connected to the protective plate 30, and a portion of the first sealing member 41 may be connected to the fourth connecting portion 421. Optionally, a portion of the first sealing member 41 may be connected to the protective plate 30, and a portion of the first sealing member 41 may be connected to both the third connecting portion 420 and the fourth connecting portion 421.

[0169] In the above scheme, the first sealing component 41 at least partially seals the first gap, which can effectively reduce the risk of high-temperature and high-pressure substances ejected from the battery cell 11 leaking through the first gap, and reduce the risk of thermal runaway of the adjacent battery device 100 due to the leakage of high-temperature and high-pressure substances, thus making the battery device 100 highly reliable. At the same time, the first sealing component 41 connects the protective plate 30 and the second sealing component 42, which can make the first sealing component 41, the protective component and the second sealing component 42 integrated into one, jointly playing the role of protecting against high-temperature and high-pressure substances, reducing the risk of leakage of high-temperature and high-pressure substances, and making the battery device 100 highly reliable.

[0170] According to some embodiments of this application, the second sealing member 42 includes a fourth connecting portion 421 along a third direction z, a portion of the fourth connecting portion 421 being located between the protective plate 30 and the battery cell assembly 10, and the first sealing member 41 being bonded to another portion of the fourth connecting portion 421 and the protective plate 30 respectively.

[0171] Optionally, the protective plate 30 includes a body 32 and a protrusion 33. The body 32 is disposed on the insulating plate 50 in the direction from the battery cell assembly 10 to the protective plate 30, and the protrusion 33 protrudes from the body 32. The second sealing member 42 includes a third connecting portion 420 and a fourth connecting portion 421 that are bent towards each other. The third connecting portion 420 is located on one side of the battery cell assembly 10 along the second direction y, and a portion of the third connecting portion 420 is located on the side of the second wall 22 away from the battery cell 11. A portion of the fourth connecting portion 421 is located between the protrusion 33 and the battery cell assembly 10, and another portion of the fourth connecting portion 421 is exposed outside the cavity formed by the protrusion 33 and the battery cell assembly 10. The first sealing member 41 includes a first connecting portion 410 and a second connecting portion 411 that are bent together. The first connecting portion 410 is located on the side of the protective plate 30 away from the battery cell assembly 10. The first connecting portion 410 is bonded to the surface of the protective plate 30 away from the insulating plate 50 and to another part of the fourth connecting portion 421 located outside the chamber. The second connecting portion 411 is bonded to the outer side of the first wall 21.

[0172] Optionally, the battery device 100 further includes an insulating plate 50, which is disposed on one side of the battery cell assembly 10 along the third direction z. A current-connecting member is provided on the insulating plate 50 for electrically connecting the battery cell 11. The protective plate 30 includes a body 32 and a protrusion 33. The body 32 is disposed on the insulating plate 50 along the direction from the battery cell assembly 10 to the insulating plate 50. The protrusion 33 protrudes from the body 32, forming a cavity between the protrusion 33 and the insulating plate 50. The second sealing member 42 includes a third connecting portion 420 and a fourth connecting portion 421 that are bent towards each other. The third connecting portion 420 is located on one side of the battery cell assembly 10 along the second direction y, and a portion of the third connecting portion 420 is located on the side of the second wall 22 facing away from the battery cell 11. A portion of the fourth connecting portion 421 is located in the cavity formed between the protrusion 33 and the insulating plate 50, and the other portion of the fourth connecting portion 421 is located on the insulating plate 50 and outside the cavity. The first sealing member 41 includes a first connecting portion 410 and a second connecting portion 411 that are bent together. The first connecting portion 410 is located on the side of the protective plate 30 away from the battery cell assembly 10. The first connecting portion 410 is bonded to the surface of the protective plate 30 away from the insulating plate 50 and to another part of the fourth connecting portion 421 located outside the chamber. The second connecting portion 411 is bonded to the outer side of the first wall 21.

[0173] In the above scheme, the second sealing member 42 includes a fourth connecting part 421. A portion of the fourth connecting part 421 is disposed between the protective plate 30 and the battery cell assembly 10. The first sealing member 41 is bonded to another portion of the fourth connecting part 421 and the protective plate 30. On the one hand, this allows a portion of the second sealing member 42 to overlap with the protective plate 30, effectively sealing the second gap. On the other hand, it facilitates the first sealing member 41 to connect the second sealing member 42 and the protective plate 30 into a whole, which together play a role in protecting against high-temperature and high-pressure substances, reducing the risk of leakage of high-temperature and high-pressure substances, and making the battery device 100 highly reliable.

[0174] According to some embodiments of this application, please refer to Figure 4 The battery device 100 also includes an insulating plate 50, which is located between the battery cell assembly 10 and the protective plate 30. The insulating plate 50 is provided with a current-charging component for electrical connection with the battery cell 11.

[0175] In some implementations, the material of the insulating board 50 includes, but is not limited to, insulating plastics, rubber, or composite materials.

[0176] In some embodiments, the battery device 100 further includes an insulating plate 50 disposed between the battery cell assembly 10 and the protective plate 30. The insulating plate 50 is provided with a plurality of current-combining members, which can electrically connect two adjacent battery cells 11.

[0177] Optionally, a sampling device can also be provided on the insulating plate 50. The sampling device can be connected to the battery cell 11 to collect information such as voltage, current or temperature of the battery cell 11.

[0178] In the above scheme, the battery device 100 also includes an insulating plate 50, on which a current-combining component is provided. The current-combining component can electrically connect adjacent battery cells 11, enabling the battery device 100 to have a higher voltage to meet the power supply requirements.

[0179] According to some embodiments of this application, please refer to Figure 8 and Figure 9 , Figure 8 This is a magnified view of point C in section 4. Figure 9 for Figure 4 Enlarged view of point D in the middle.

[0180] A positioning groove 31 is formed on one side of the protective plate 30 along the first direction x, and the positioning groove 31 penetrates the protective plate 30 along the third direction z. Along the third direction z, a protrusion 51 is formed on the side of the insulating plate 50 opposite to the battery cell assembly 10, and the protrusion 51 is at least partially disposed in the positioning groove 31.

[0181] In some embodiments, a positioning groove 31 is formed on one side of the protective plate 30 along the first direction x, and the positioning groove 31 penetrates the protective plate 30 along the third direction z. That is, the positioning groove 31 can be understood as a notch formed on one side of the protective plate 30 along the first direction x. A protrusion 51 corresponding to the positioning groove 31 is formed on the side of the insulating plate 50 facing the protective plate 30. The protrusion 51 can be inserted into the positioning groove 31 to constrain the protective plate 30 in the first direction x and the second direction y.

[0182] Optionally, please see Figure 8 The protective plate 30 has a partial recess on the side opposite to the battery cell assembly 10, and the positioning groove 31 is formed in the recessed area. When the protrusion 51 is provided in the positioning groove 31, the protrusion 51 can be located in the recessed area, that is, it does not extend beyond the protective plate 30.

[0183] Optionally, in some embodiments, the portion of the first sealing member 41 corresponding to the protrusion 51 can be hollowed out.

[0184] In the above scheme, a positioning groove 31 is provided on one side of the protective plate 30 along the first direction x, and a protrusion 51 is provided on the insulating plate 50. This can realize the positioning constraint of the protective plate 30 and the insulating plate 50 in the first direction x and the second direction y, which is beneficial to improving the assembly efficiency of the battery device 100.

[0185] According to some embodiments of this application, the protective plate 30 has positioning grooves 31 formed on both sides along the first direction x, and the insulating plate 50 has protrusions 51 on the side opposite to the battery cell assembly 10 that correspond one-to-one with the positioning grooves 31.

[0186] In some embodiments, the protective plate 30 has positioning grooves 31 formed on both sides along the first direction x, and the insulating plate 50 is provided with protrusions 51 corresponding to the positioning grooves 31, with each protrusion 51 disposed in the corresponding positioning groove 31.

[0187] Optionally, on each side of the protective plate 30 along the first direction x, there are multiple positioning grooves 31, and the multiple positioning grooves 31 are arranged at intervals along the second direction y.

[0188] In the above scheme, by providing positioning grooves 31 on both sides of the protective plate 30 along the first direction x and providing corresponding protrusions 51 on the insulating plate 50, the positioning constraints of the protective plate 30 and the insulating plate 50 in the first direction x and the second direction y can be further realized, so that the battery device 100 has high assembly efficiency.

[0189] According to some embodiments of this application, a plurality of battery cells 11 in the battery cell assembly 10 are arranged along a second direction y, which is perpendicular to the surface of the battery cell 11 with the largest area.

[0190] In some embodiments, the battery cell assembly 10 includes a plurality of battery cells 11 arranged along a second direction y. The plurality of battery cells 11 are stacked along the second direction y, and the surfaces of the largest areas of two adjacent battery cells 11 are bonded to each other.

[0191] Please see Figure 1 Some embodiments of this application also provide an electrical device, including the battery device 100 provided above.

[0192] The electrical device can be a vehicle 1000, and the vehicle 1000 can include a battery device 100.

[0193] The battery device 100 can be a battery pack 400 and / or a battery module.

[0194] The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0195] Please see Figures 3-8 Some embodiments of this application provide a battery device 100.

[0196] The battery assembly 100 includes a battery cell assembly 10, a frame 20, a protective plate 30, a sealing assembly 40, and an insulating plate 50. The frame 20 includes two first walls 21 and two second walls 22. The two first walls 21 are spaced apart along a first direction x, and the two second walls 22 are spaced apart along a second direction y. The first walls 21 and second walls 22 are connected. The battery cell assembly 10 is located between the two first walls 21 and between the two second walls 22, and includes a plurality of battery cells 11 arranged along the second direction y. The protective plate 30 is located on one side of the battery cell assembly 10 along a third direction z, and a pressure relief mechanism is provided on the side of the battery assembly facing the protective plate 30. The insulating plate 50 is disposed between the protective plate 30 and the battery cell assembly 10, and a current-combining member is provided on the insulating plate 50, which is electrically connected to the battery cells 11.

[0197] The protective plate 30 is a mica plate. Positioning grooves 31 are provided on both sides of the protective plate 30 along the first direction x, and there are multiple positioning grooves 31. These multiple positioning grooves 31 are spaced apart along the second direction y. The insulating plate 50 has protrusions 51 on the side opposite to the battery cell assembly 10, each corresponding to a positioning groove 31. The protrusions 51 are disposed in the positioning grooves 31 to constrain the protective plate 30 in the first direction x and the second direction y.

[0198] The sealing assembly 40 includes a first sealing element 41 and a second sealing element 42. The first sealing element 41 can be a ceramic composite strip, and the second sealing element 42 can be a mica plate.

[0199] The second sealing member 42 is used to seal the second gap formed between the protective plate 30 and the second wall 22. The second sealing member 42 includes a third connecting part 420 and a fourth connecting part 421 that are connected to each other. A portion of the third connecting part 420 is located on one side of the battery cell assembly 10 along the second direction y, and the other portion of the third connecting part 420 is located on the side of the second wall 22 away from the battery cell assembly 10. The fourth connecting part 421 is bent from the third connecting part 420, and the fourth connecting part is located between the protective plate 30 and the insulating plate 50. The other portion of the fourth connecting part 421 is located on the side of the insulating plate 50 away from the battery cell assembly 10.

[0200] The first sealing member 41 is used to seal the first gap formed between the protective plate 30 and the first wall 21. The first sealing member 41 includes a first connecting part 410 and a second connecting part 411 connected to each other. The first connecting part 410 is bonded to the side of the protective plate 30 away from the battery cell assembly 10 and another part of the fourth connecting part 421 away from the insulating plate 50. The second connecting part 411 is bonded to the side of the first wall 21 away from the battery cell assembly 10.

[0201] In the battery device 100 provided above, a protective plate 30 is provided on one side of the battery cell assembly 10 along the third direction z, which can block the high-temperature and high-pressure substances ejected by the pressure relief mechanism, reducing the impact of the high-temperature and high-pressure substances on the outside of the battery device 100 or on adjacent battery devices 100. By providing a sealing component 40 to seal the first gap and the second gap formed between the protective plate 30 and the frame 20, the risk of high-temperature and high-pressure substances leaking from the first gap and the second gap to the outside of the battery device 100 and affecting adjacent battery devices 100, causing thermal runaway of the battery device 100, can be effectively reduced, which is conducive to improving the reliability of the battery device 100.

[0202] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, comprising multiple battery cells; The frame includes two first walls and two second walls, the two first walls are spaced apart along a first direction, the two second walls are spaced apart along a second direction, the first walls are connected to the second walls, and the battery cell assembly is located between the two first walls and between the two second walls. A protective plate is located on one side of the battery cell assembly along a third direction. A pressure relief mechanism is provided on the side of the battery cell facing the protective plate, and a gap is formed between the protective plate and the frame. The first direction, the second direction, and the third direction are perpendicular to each other. A sealing component that at least partially seals the gap.

2. The battery device according to claim 1, characterized in that, The gap includes a first gap formed between the protective plate and the first wall, and the sealing assembly includes a first sealing member that at least partially seals the first gap.

3. The battery device according to claim 2, characterized in that, The first sealing element connects the protective plate and the first wall.

4. The battery device according to claim 3, characterized in that, The first sealing component is bonded to both the protective plate and the first wall.

5. The battery device according to claim 3, characterized in that, The first sealing component includes a first connecting part and a second connecting part that are connected to each other; The first connecting part is connected to the side of the protective plate opposite to the battery cell assembly, and the second connecting part is connected to the side of the first wall opposite to the battery cell assembly.

6. The battery device according to claim 2, characterized in that, The first sealing component is an insulating composite tape.

7. The battery device according to claim 6, characterized in that, The first sealing component is a ceramic composite strip.

8. The battery device according to any one of claims 1-7, characterized in that, The gap includes a second gap formed between the protective plate and the second wall, and the sealing assembly includes a second sealing member that at least partially seals the second gap.

9. The battery device according to claim 8, characterized in that, The second sealing component includes a third connecting part and a fourth connecting part that are interconnected; Along the second direction, the third connection portion is located on one side of the battery cell assembly, and along the third direction, at least a portion of the fourth connection portion is located between the protective plate and the battery cell assembly.

10. The battery device according to claim 8, characterized in that, The second sealing component is made of mica.

11. The battery device according to claim 1, characterized in that, The protective plate is made of mica.

12. The battery device according to claim 8, characterized in that, The gap includes a first gap formed between the protective plate and the first wall, and the sealing assembly includes a first sealing member that at least partially seals the first gap, the first sealing member connecting the protective plate and the second sealing member.

13. The battery device according to claim 12, characterized in that, The second sealing member includes a fourth connecting portion along the third direction, a portion of which is located between the protective plate and the battery cell assembly, and the first sealing member is bonded to another portion of the fourth connecting portion and the protective plate.

14. The battery device according to claim 1, characterized in that, The battery device also includes: An insulating plate is located between the battery cell assembly and the protective plate. The insulating plate is provided with a busbar for electrical connection with the battery cell.

15. The battery device according to claim 14, characterized in that, The protective plate has a positioning groove formed on one side along the first direction, and the positioning groove penetrates the protective plate along the third direction. Along the third direction, a protrusion is formed on the side of the insulating plate opposite to the battery cell assembly, and the protrusion is at least partially disposed in the positioning groove.

16. The battery device according to claim 15, characterized in that, The protective plate has positioning grooves formed on both sides along the first direction, and the insulating plate has protrusions on the side opposite to the battery cell assembly that correspond one-to-one with the positioning grooves.

17. The battery device according to claim 1, characterized in that, The plurality of battery cells in the battery cell assembly are arranged along the second direction, which is perpendicular to the surface of the battery cell with the largest area.

18. An electrical appliance, characterized in that, The electrical device includes the battery device according to any one of claims 1-17.

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