Battery device and electric device

Abstract

The application relates to the technical field of batteries, and discloses a battery device and a power utilization device. The battery device comprises a box assembly, a first structural beam, a plurality of battery monomers and a protective plate. The box assembly comprises a first box and a second box, and the first box and the second box define a containing space. The plurality of battery monomers and the first structural beam are arranged in a second direction. The protective plate is connected between the plurality of battery monomers and the first box in a first direction. One end of the protective plate in the second direction is connected to the first structural beam. A first gap is formed between one end of the protective plate and the first box, and the first gap is filled with a first buffer. In the technical scheme of the application, the first buffer can play a supporting and buffering role, the risk of plastic deformation, cracking or loosening of the first connecting part from the first structural beam is reduced, the structural reliability of the battery device is improved, and the mechanical safety protection capability of the battery device under harsh working conditions such as scratching or impact is enhanced.

Description

Technical Field

[0001] This application relates to the field of batteries, 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 related technologies, when the bottom of a vehicle is scratched or impacted by an external obstacle, it will first scrape the battery pack housing. When the housing is damaged, the external obstacle will scrape the end of the protective plate, affecting the structural reliability of the battery pack. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can improve the structural reliability of the battery device and enhance the mechanical safety protection capability of the battery device under harsh working conditions such as scratches or impacts.

[0005] In a first aspect, this application provides a battery device, comprising: a housing assembly, the housing assembly including a first housing and a second housing, the first housing being connected to one side of the second housing in a first direction and defining an accommodating space with the second housing; a first structural beam, the first structural beam being disposed in the accommodating space and connected to the second housing; a plurality of battery cells, the plurality of battery cells being disposed in the accommodating space and arranged with the first structural beam in a second direction, the second direction intersecting the first direction; a protective plate, the protective plate being disposed between the plurality of battery cells and the first housing, the protective plate having a first connecting portion at one end in the second direction, the first connecting portion being disposed opposite to and connected to the first structural beam in the first direction, and a first gap being formed between the first connecting portion and the first housing in the first direction, the first gap being filled with a first buffer member.

[0006] In the technical solution of this application embodiment, by filling the first gap with a first buffer member, that is, by placing the first buffer member between the first housing and the first connection part of the protective plate, on the one hand, the first buffer member can play a supporting role and enhance the overall rigidity of the first housing and the protective plate at the first gap. On the other hand, the first buffer member can play a buffering role. When the first housing encounters scratches or impacts along the second direction, the first buffer member undergoes compression deformation, which can efficiently absorb and dissipate impact energy and reduce the peak dynamic load transmitted to the central area of ​​the protective plate. This greatly reduces the risk of plastic deformation, cracking, or loosening of the connection position with the first structural beam at the first connection part of the protective plate due to local stress concentration. It also reduces the insulation and fixing failure of the sampling component or low-voltage communication component in the housing assembly, reduces the probability of short circuits, local arcing, and sparking, and reduces the relative displacement between the battery cell and the housing assembly. This fundamentally improves the structural reliability of the battery device and enhances the mechanical safety protection capability of the battery device under harsh working conditions such as scratches or impacts.

[0007] In some embodiments, the protective plate includes a main body, which is disposed opposite to a plurality of battery cells in a first direction, and a first connecting portion is connected to one end of the main body in a second direction; wherein, the surface of the first buffer member facing away from the first connecting portion is flush with the surface of the main body facing away from the battery cells. In the above technical solution, by aligning the surface of the first buffer member facing away from the first connecting portion with the surface of the main body facing away from the battery cells, the first buffer member can effectively fill the first gap, allowing the first buffer member to connect with the first connecting portion and the first housing, thereby reducing blind spots in protection without affecting the original assembly relationship and spatial layout.

[0008] In some embodiments, the shape of the first buffer member is the same as the shape of the first gap, so as to match each other. In the above technical solution, setting the shape of the first buffer member to be the same as the shape of the first gap can make the first buffer member match the first gap, thereby making the first buffer member completely fill the first gap, thereby reducing the protection blind spot.

[0009] In some embodiments, a plurality of first structural reinforcement members are provided on the side of the first connecting portion away from the first structural beam. The plurality of first structural reinforcement members are arranged at intervals along the length direction of the first structural beam, and at least one first buffer member is located between two adjacent first structural reinforcement members. In the above technical solution, by providing a plurality of first structural reinforcement members on the first connecting portion, the structural strength of the first connecting portion of the protective plate can be improved, thereby enhancing the connection reliability between the protective plate and the first structural beam. The arrangement of the first buffer member and the first structural reinforcement members along the length direction of the first structural beam allows the protective plate to provide continuous and uniform support to the first box body at one end in the second direction, transforming it from a "free boundary" to a "supported boundary".

[0010] In some embodiments, the first connecting portion has a first protrusion on the side opposite to the first structural beam. Along the length of the first structural beam, the first protrusion is located between two adjacent first structural reinforcements, and at least one first buffer member is located between the first structural reinforcement and the first protrusion. In the above technical solution, by providing a first protrusion on the side of the first connecting portion opposite to the first structural beam, the structural strength of the first connecting portion can be improved, thereby enhancing its resistance to deformation under harsh conditions such as scratches or impacts, and ultimately improving the structural stability and reliability of the battery device.

[0011] In some embodiments, the first connecting portion has a second protrusion on the side opposite to the first structural beam, and at least one of the first structural reinforcements covers the second protrusion. In the above technical solution, by providing a second protrusion on the side of the first connecting portion opposite to the first structural beam, the structural strength of the first connecting portion can be further improved, thereby further enhancing the first connecting portion's resistance to deformation under harsh working conditions such as scratches or impacts, and thus improving the structural stability and reliability of the battery device.

[0012] In some embodiments, the battery device further includes a pressure strip extending along the second direction and connecting the battery cell and the protective plate, wherein a gap exists between two adjacent battery cells in the second direction, and the pressure strip is at least partially disposed opposite to the gap in the first direction. In the above technical solution, by providing the pressure strip, the battery cells can be fixed, reducing the probability of battery cell movement, and the gap size between two adjacent battery cells can be kept constant.

[0013] In some embodiments, the protective plate has a recess on the side facing the battery cell, the recess extending along the second direction, and the pressure strip disposed within the recess. In the above technical solution, by providing a recess on the side of the protective plate facing the battery cell, the structural strength of the protective plate can be improved, thereby enhancing its resistance to deformation. Furthermore, the pressure strip can be positioned, improving the connection efficiency and reliability between the pressure strip and the protective plate, and reducing relative displacement between them.

[0014] In some embodiments, the recess includes a first recess, one end of which extends to the first connecting portion; wherein the first connecting portion has a first protrusion on the side opposite to the first structural beam, the first protrusion corresponding to a portion of the first recess at the first connecting portion, and along the length direction of the first structural beam, the first protrusion is located between two adjacent first structural reinforcements, and at least one first buffer is located between the first structural reinforcement and the first protrusion. In the above technical solution, by extending the first recess to the first connecting portion and forming a first protrusion corresponding to the position of the first recess on the side of the first connecting portion opposite to the first structural beam, the structural strength of the first connecting portion can be improved, thereby enhancing its resistance to deformation under harsh conditions such as scratches or impacts encountered by the battery device, and thus improving the structural stability and reliability of the battery device.

[0015] In some embodiments, the recess includes a second recess, one end of which extends to the first connecting portion; wherein the first connecting portion has a second protrusion on the side opposite to the first structural beam, the second protrusion corresponding to a portion of the second recess at the first connecting portion, and at least one of the first structural reinforcements covers the second protrusion. In the above technical solution, by extending the second recess to the first connecting portion and forming a second protrusion corresponding to the position of the second recess on the side of the first connecting portion opposite to the first structural beam, the structural strength of the first connecting portion can be improved, thereby further enhancing the first connecting portion's resistance to deformation under harsh conditions such as scratches or impacts encountered by the battery device, thereby improving the structural stability and reliability of the battery device.

[0016] In some embodiments, the protective plate has multiple protrusions on the side facing the multiple battery cells. These protrusions are spaced apart along the length of the first structural beam and extend along the second direction to press against the busbar components on the battery cells. The pressure strip is located between two adjacent protrusions. In the above technical solution, by providing protrusions, the structural strength of the protective plate can be improved, thereby enhancing its resistance to deformation. Furthermore, the protrusions can be used to press against the busbar components, thus fixing them and reducing the probability of movement. In addition, the protrusions can position the pressure strip, improving the connection efficiency and reliability between the pressure strip and the protective plate, and reducing relative displacement between them.

[0017] In some embodiments, the first structural reinforcement member and the first structural beam are connected by a first fastener, which passes through the first connecting portion. In the above technical solution, by providing the first fastener, the first structural reinforcement member, the first connecting portion of the protective plate, and the first structural beam can be connected together, thereby improving the installation reliability and stability of the protective plate and enabling the protective plate to effectively protect multiple battery cells.

[0018] In some embodiments, the battery cell further includes a second structural beam disposed in the receiving space and spaced apart from the first structural beam in the second direction. Multiple battery cells are located between the first and second structural beams. The protective plate has a second connecting portion at its other end in the second direction, and the second connecting portion is disposed opposite to and connected to the second structural beam in the first direction. In the above technical solution, by setting the first and second structural beams and placing multiple battery cells between them, the first and second structural beams can constrain the multiple battery cells, reducing the probability of bulging and deformation. They can also absorb and disperse the expansion force of the multiple battery cells and transmit the force to the housing assembly, thus protecting the multiple battery cells and other components within the housing assembly (such as sampling components).

[0019] In some embodiments, in the first direction, there is a second gap between the second connecting portion and the first housing, and the second gap is filled with a second buffer. In the above technical solution, by filling the second gap with a second buffer element, i.e., placing the second buffer element between the second connection part of the first housing and the protective plate, the second buffer element can play a supporting role, enhancing the overall rigidity of the first housing and the protective plate at the second gap. This allows the protective plate to form continuous and uniform support for the first housing at the other end in the second direction, transforming it from a "free boundary" to a "supported boundary." On the other hand, the second buffer element can play a buffering role. When the first housing encounters scratches or impacts along the second direction, the second buffer element undergoes compressive deformation, which can efficiently absorb and dissipate impact energy, reducing the peak dynamic load transmitted to the central area of ​​the protective plate. This greatly reduces the risk of plastic deformation, cracking, or loosening of the connection position with the second structural beam at the second connection part of the protective plate due to local stress concentration. It also reduces the insulation and fixing failure of the sampling components or low-voltage communication components in the housing assembly, reduces the probability of short circuits, local arcing, and sparking, and reduces the relative displacement between the battery cells and the housing assembly. This fundamentally improves the structural reliability of the battery device, thereby enhancing the mechanical safety protection capability of the battery device under harsh working conditions such as scratches or impacts.

[0020] In some embodiments, a plurality of second structural reinforcements are provided on the side of the second connecting portion away from the second structural beam. These second structural reinforcements are spaced apart along the length of the second structural beam, and at least one second buffer is located between two adjacent second structural reinforcements. In the above technical solution, by providing a plurality of second structural reinforcements on the second connecting portion, the structural strength of the second connecting portion of the protective plate can be improved, thereby enhancing the connection reliability between the protective plate and the second structural beam. Furthermore, the arrangement of the second buffers and second structural reinforcements along the length of the second structural beam allows the protective plate to provide continuous and uniform support to the first housing at one end in the second direction.

[0021] In some embodiments, the protective plate includes a main body portion, which is disposed opposite to a plurality of battery cells in the first direction, and a second connecting portion is connected to the other end of the main body portion in the second direction; wherein, the surface of the second buffer member facing away from the second connecting portion is flush with the surface of the main body portion facing away from the battery cells. In the above technical solution, by aligning the surface of the second buffer member facing away from the second connecting portion with the surface of the main body portion facing away from the battery cells, the second buffer member can effectively fill the second gap, allowing the second buffer member to connect with the second connecting portion and the first housing, thereby reducing blind spots in protection without affecting the original assembly relationship and spatial layout.

[0022] In some embodiments, there are multiple first buffer members, arranged along the length of the first structural beam; there are also multiple second buffer members, arranged along the length of the second structural beam, with the multiple first buffer members and multiple second buffer members corresponding one-to-one in the second direction. In the above technical solution, by providing multiple first buffer members and multiple second buffer members, the impact resistance of the protective plate at both ends in the second direction can be improved, thereby reducing the peak dynamic load transmitted to the central area of ​​the protective plate. This significantly reduces the risk of plastic deformation, cracking, or connection failure with the structural beam at both ends of the protective plate due to local stress concentration, reduces insulation and fixing failures of sampling components or low-voltage communication components within the enclosure assembly, and lowers the probability of short circuits, localized arcing, and sparking.

[0023] In some embodiments, both the first and second buffer components are rigid foam components. In the above technical solution, by setting the first and second buffer components as rigid foam components, the weight of the battery device is reduced, while allowing the first and second buffer components to perform buffering and auxiliary support functions. When the first housing experiences a scratch impact, on the one hand, the first and second buffer components themselves undergo compression deformation, effectively absorbing and dispersing the impact energy and reducing the stress peak transmitted to the protective plate; on the other hand, the first and second buffer components can provide auxiliary support. Furthermore, the first and second buffer components can establish a physical buffer layer between the protective plate and external obstacles, reducing the risk of sharp objects scratching or puncturing the metal plate.

[0024] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments.

[0025] In the technical solution of this application embodiment, by adopting the above-mentioned battery device, the structural reliability of the electrical device can be improved, and the reliability of the electrical device under harsh working conditions such as scratches or impacts can be enhanced.

[0026] In some embodiments, the electrical device includes a vehicle, the battery device is disposed at the bottom of the vehicle, and the first housing is arranged on the ground-facing side of the second housing. This technical solution enhances the reliability of the vehicle under harsh conditions such as scraping the undercarriage.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0029] Figure 1 The electrical device shown in some embodiments of this application is a structural schematic diagram of a vehicle;

[0030] Figure 2 Exploded views of battery devices according to some embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a battery cell according to some embodiments of this application;

[0032] Figure 4 A side view of the battery device according to some embodiments of this application, excluding the first housing;

[0033] Figure 5 for Figure 4 An enlarged view of part A shown in the image;

[0034] Figure 6 for Figure 4 A perspective view of the battery device shown;

[0035] Figure 7 for Figure 6 An enlarged view of part B shown in the diagram;

[0036] Figure 8 for Figure 6 The diagram shows a structural schematic of the protective plate from one perspective;

[0037] Figure 9 for Figure 8 An enlarged view of section C shown in the diagram;

[0038] Figure 10 for Figure 6 The diagram shows the structure of the protective plate from another perspective;

[0039] Figure 11 for Figure 10 An enlarged view of part D shown.

[0040] The reference numerals in the detailed embodiments are as follows:

[0041] Vehicle 1000; Battery unit 100; Controller 200; Motor 300;

[0042] Box assembly 40; containment space 401; first box 41; second box 42;

[0043] Battery cell 50; gap 501; casing 51; casing body 511; opening 5110; casing cover 512; electrode assembly 52; active material coating part 521; conductive part 522; terminal post 53; insulating part 54;

[0044] First structural beam 61; First fastener 611; Second structural beam 62; Second fastener 621;

[0045] Protective plate 70; first gap 701; recess 703; first recess 7031; second recess 7032; first connecting part 71; first protrusion 711; second protrusion 712; second connecting part 72; main body 73; protrusion 731;

[0046] First structural reinforcement 81; Second structural reinforcement 82; Pressure strip 83; Cavity 831;

[0047] First buffer 91; Second buffer 92. Detailed Implementation

[0048] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0054] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0056] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0057] In related technologies, battery devices are used in vehicles. The end of the protective plate of the battery device is connected to the structural beam, and there is a gap between the two in the non-connection area. During vehicle operation, if the bottom of the vehicle is scratched or impacted by external obstacles, it will first scrape the battery device's housing. When the housing is damaged, the external obstacle will scrape the end of the protective plate. Since the end of the protective plate and the structural beam are prone to deformation or cracking at the gap, the impact force will reach the central area of ​​the protective plate, which may damage the insulation and fixation of the sampling components or low-voltage communication components inside the housing assembly, induce electrical faults, and pose risks of short circuits, local arcing, and sparking, thereby inducing thermal runaway and other problems. It can also cause relative displacement between the battery cells and the housing assembly, affecting structural stability.

[0058] To this end, this application proposes a battery device that fills a first gap between a first housing and a protective plate with a first buffer member. The first buffer member provides support and cushioning, reducing the peak dynamic load transmitted to the central area of ​​the protective plate. This reduces the risk of plastic deformation, cracking, or loosening of the connection between the protective plate and the first structural beam at the end of the protective plate, thereby improving the structural reliability of the battery device and its mechanical safety protection capability under complex road conditions. It is especially suitable for bottom scraping conditions that may occur during vehicle operation.

[0059] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0060] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0061] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000, representing some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. 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. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0062] In some embodiments 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.

[0063] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 according to some embodiments of this application. The battery device 100 includes a housing assembly 40 and a plurality of battery cells 50. The housing assembly 40 defines a receiving space 401 in which the plurality of battery cells 50 are disposed. The housing assembly 40 may have various structures.

[0064] In the battery device 100, there can be multiple battery cells 50, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 50 are connected in both series and parallel connections. Multiple battery cells 50 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of multiple battery cells 50 is housed within the housing assembly 40. Alternatively, the battery device 100 can also consist of multiple battery cells 50 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 40. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 50.

[0065] Each battery cell 50 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 50 can be cylindrical, flat, cuboid, or other shapes.

[0066] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 50 according to some embodiments of this application. The battery cell 50 refers to the smallest unit that makes up the battery device 100. For example... Figure 3 The battery cell 50 includes a housing 51, an electrode assembly 52, a terminal post 53, and other functional components. The housing 51 includes a body 511 and a cover 512.

[0067] The cover 512 refers to a component that covers the opening 5110 of the housing 511 to isolate the internal environment of the battery cell 50 from the external environment. The shape of the cover 512 can be adapted to the shape of the housing 511 to fit it. Optionally, the cover 512 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cover 512 is not easily deformed under pressure and impact, allowing the battery cell 50 to have higher structural strength and improved reliability. Functional components such as electrode terminals can be provided on the cover 512. The electrode terminals can be used to electrically connect to the electrode assembly 52 for outputting or inputting electrical energy into the battery cell 50. In some embodiments, the cover 512 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 50 reaches a threshold. The material of the cover 512 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating member 54 may be provided on the inner side of the cover 512. The insulating member 54 can be used to isolate the electrical connection components inside the housing 511 from the cover 512 to reduce the risk of short circuit. For example, the insulating member 54 may be made of plastic, rubber, etc.

[0068] The housing 511 is a component used to cooperate with the cover 512 to form the internal environment of the battery cell 50. This internal environment can accommodate the electrode assembly 52, electrolyte, and other components. The housing 511 and cover 512 can be independent components. An opening 5110 can be provided on the housing 511, and the cover 512 can close the opening 5110 to form the internal environment of the battery cell 50. Alternatively, the cover 512 and housing 511 can be integrated. Specifically, the cover 512 and housing 511 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 511, the cover 512 closes the housing 511. The housing 511 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 511 can be determined according to the specific shape and size of the electrode assembly 52. The shell 511 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0069] Electrode assembly 52 is a component in the battery cell 50 where electrochemical reactions occur. The housing 511 may contain one or more electrode assemblies 52.

[0070] The electrode assembly 52 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body 73 of the electrode assembly 52, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs can be located together at one end of the electrode body or at opposite ends of the electrode body. During the charging and discharging process of the battery cell 50, the positive and negative active materials react with the electrolyte, and the tabs connect to the terminals 53 to form a current loop.

[0071] In some embodiments, the electrode assembly 52 includes an active material coating portion 521 and a conductive portion 522. The conductive portion 522 is connected to one end of the active material coating portion 521 near the electrode post 53, and the conductive portion 522 is electrically connected to the electrode post 53.

[0072] Reference Figure 4 and Figure 5 , Figure 4 A side view of the battery device 100 of some embodiments of this application, excluding the first housing 41; Figure 5 for Figure 4 The enlarged view of part A shown in the figure. Some embodiments of this application provide a battery device 100, which includes a housing assembly 40, a first structural beam 61, a plurality of battery cells 50, and a protective plate 70.

[0073] The housing assembly 40 includes a first housing 41 and a second housing 42. The first housing 41 is connected to one side of the second housing 42 in a first direction, and the first housing 41 and the second housing 42 define an accommodating space 401.

[0074] The battery device 100 also includes a first structural beam 61, which is disposed in the receiving space 401 and connected to the second housing 42. Multiple battery cells 50 are arranged with the first structural beam 61 in a second direction.

[0075] The battery assembly 100 also includes a protective plate 70, which is disposed between the plurality of battery cells 50 and the first housing 41. The protective plate 70 has a first connecting portion 71 at one end in a second direction. The first connecting portion 71 is disposed opposite to and connected to the first structural beam 61 in the first direction. In the first direction, there is a first gap 701 between the first connecting portion 71 and the first housing 41, and the first gap 701 is filled with a first buffer member 91.

[0076] The housing assembly 40 can be a component that provides a receiving space 401 for accommodating multiple battery cells 50, protective plates 70, and other components located inside the battery device 100. The housing assembly 40 provides protection for these components. The housing assembly 40 may include a first housing 41 and a second housing 42, with the first housing 41 connected to one side of the second housing 42 in a first direction, defining the receiving space 401 between the first housing 41 and the second housing 42. The first housing 41 and the second housing 42 can be connected by fasteners, welding, snap-fitting, or other methods. Figure 2 As shown in the figure, the X direction is the first direction, which can be the height direction of the box assembly 40.

[0077] The second housing 42 can be a hollow structure with one open end, and the first housing 41 can be a plate-like structure. The first housing 41 covers the open side of the second housing 42 so that the first housing 41 and the second housing 42 together define the accommodating space 401. Alternatively, the first housing 41 and the second housing 42 can both be hollow structures with one open end, and the open side of the first housing 41 covers the open side of the second housing 42. Of course, the housing assembly 40 formed by the first housing 41 and the second housing 42 can be of various shapes, such as a cylinder, a cuboid, etc.

[0078] The first structural beam 61 can be a component used to strengthen the structural strength of the housing assembly 40 or to separate the accommodating space 401. The first structural beam 61 can refer to a structure fixedly connected within the housing assembly 40 and used to provide support and restraint for the battery cells 50. The first structural beam 61 can extend along a third direction and be fixedly connected to the side wall of the second housing 42. For example, the first structural beam 61 can be integrally formed with the second housing 42, or it can be fixedly connected to the second housing 42 by welding, bracket connection, or other methods. The first structural beam 61 and multiple battery cells 50 are arranged in a second direction. The first structural beam 61 can constrain the multiple battery cells 50, reducing the probability of bulging and deformation of the battery cells 50. It can also absorb and disperse the expansion force of the multiple battery cells 50 and transmit the force to the housing assembly 40, thus protecting the multiple battery cells 50 and other components within the housing assembly 40 (such as sampling components).

[0079] In this configuration, the first direction, the second direction, and the third direction intersect each other pairwise and are not coplanar. Optionally, the intersection of any two of the first direction, the second direction, and the third direction can refer to the two directions intersecting at an angle or perpendicularly. In some specific examples, the first direction, the second direction, and the third direction are mutually perpendicular. For example... Figure 4As shown in the figure, the X direction is the first direction, the Y direction is the second direction, and the Z direction is the third direction. For example, the first direction can be the height direction of the box assembly 40, the second direction can be the length direction of the box assembly 40, and the third direction can be the width direction of the box assembly 40.

[0080] Multiple battery cells 50 can be stacked along a second direction to form a battery cell assembly. Stacking multiple battery cells 50 along the second direction can mean that the largest surface area in the casing 51 of each battery cell 50 is a first surface, also referred to as the large surface of the battery cell 50. The first surface can be perpendicular to the second direction, i.e., parallel to the length direction (third direction) of the first structural beam 61. When multiple battery cells 50 are stacked, the first surfaces of adjacent battery cells 50 are abutted or opposite each other. The first surface of the battery cell 50 can abut against the first structural beam 61 along the second direction. The expansion force generated by the battery cell 50 during charging and discharging is mainly transmitted along the stacking direction (second direction), and the first structural beam 61 can effectively absorb the expansion force. Furthermore, multiple battery cell assemblies can be configured, and these multiple battery cell assemblies are arranged along a third direction to form a battery cell array. The arrangement of multiple battery cells 50 and the first structural beam 61 in the second direction can mean that the large surface of any one of the multiple battery cell assemblies arranged along the third direction abuts against the first structural beam 61 along the outermost surface of the battery cell 50 in the second direction.

[0081] The protective plate 70 may be a structural component disposed along a first direction between the housing assembly 40 and the plurality of battery cells 50. The protective plate 70 may be a plate-shaped component used to cover and protect the terminals 53, electrical connections, pressure relief mechanisms, sampling components, etc., of the battery cells 50. The protective plate 70 may be made of a metallic material to provide high structural strength; alternatively, the protective plate 70 may also be made of a composite material to reduce weight and increase the energy density of the battery device 100 while ensuring structural strength. The ends of the protective plate 70 may be fixedly connected to the first structural beam 61 to form a stable frame structure, thereby improving the overall structural strength of the battery device 100. Specific connection methods may include fastener connection, welding, bonding, snap-fit, etc. The protective plate 70 may include a main body 73 and a first connecting portion 71 connected to one end of the main body 73 in a second direction.

[0082] The main body 73 can be the main part of the protective plate 70. The main body 73 can be a plate-like component covering one side of the multiple battery cells 50 in the first direction, providing protection, support, and insulation for the multiple battery cells 50. The main body 73 can extend perpendicularly to the first direction. The main body 73 can be disposed between the multiple battery cells 50 and the first housing 41 along the first direction, and the main body 73 can be bonded to the first housing 41 via an adhesive layer (e.g., structural adhesive), improving the structural strength and reliability of the battery device 100. Furthermore, the structural adhesive can provide a continuous contact surface, excellent damping and vibration reduction characteristics, and sealing function, making the protective plate 70 an efficient force transmission hub, effectively dispersing and transmitting loads from different components, thereby significantly improving the overall structural strength and safety redundancy of the battery device 100 under various operating conditions such as vibration, impact, and expansion of the battery cells 50.

[0083] The first connecting part 71 can be a connecting structure segment formed by integrally extending or fixedly connecting the main body part 73 of the protective plate 70 to the end in the second direction. The first connecting part 71 can be an end integrated structure of the protective plate 70, used to realize the alignment, assembly and fixed connection between the protective plate 70 and the first structural beam 61, and is the force-bearing and connecting carrier at the end of the protective plate 70.

[0084] In the first direction, a first gap 701 exists between the first connecting portion 71 and the first housing 41, which means that there is a suspended area between the first housing 41 and the first connecting portion 71. In some embodiments, the main body 73 of the protective plate 70 and the first connecting portion 71 are staggered in the first direction, which means that along the first direction, the first connecting portion 71 is closer to the first structural beam 61 relative to the main body 73. It is understood that in related technologies, the height of the first structural beam 61 along the first direction can be lower than the height of the battery cell 50 to reduce the weight of the first structural beam 61, as long as the first structural beam 61 meets the requirements for improving the structural strength of the housing assembly 40 and resisting the expansion force of the battery cell 50. Based on this, the embodiments of this application place the first connecting portion 71 in a position closer to the first structural beam 61 relative to the main body 73, which can reduce the weight of the protective plate 70 while meeting assembly requirements, and further improve the energy density of the battery device 100.

[0085] Reference Figure 4 and Figure 5 and further refer to Figure 6 and Figure 7 , Figure 6 for Figure 4 A perspective view of the battery device 100 shown; Figure 7 for Figure 6 An enlarged view of part B shown. In some embodiments, the first gap 701 is filled with a first buffer 91.

[0086] The first buffer member 91 can be an elastic buffer component filled inside the first gap 701. The first buffer member 91 can be adapted to the gap space for filling and assembly, used to absorb the expansion and compression force of the battery cell 50, buffer vibration impact, compensate for assembly tolerances, and limit the displacement of the end of the protective plate 70, thus achieving the dual function of deformation buffering and structural limiting. For example, the first buffer member 91 can be bonded to the protective plate 70, and the side of the first buffer member 91 facing away from the protective plate 70 can be bonded to the first housing 41.

[0087] When the battery device 100 is applied to the vehicle 1000, the first housing 41 is located below the second housing 42. During the driving of the vehicle 1000, if the bottom of the vehicle 1000 is scraped or impacted by an external obstacle in the second direction, it will first scrape the first housing 41. If the first housing 41 is damaged, it will scrape the first connecting part 71 of the protective plate 70. During this process, the first buffer 91 itself undergoes compression deformation, which can effectively absorb and disperse the impact energy, thereby reducing the stress peak transmitted to the central area of ​​the protective plate 70.

[0088] Therefore, in the technical solution of this application embodiment, by filling the first gap 701 with the first buffer member 91, that is, by placing the first buffer member 91 between the first housing 41 and the first connection portion 71 of the protective plate 70, on the one hand, the first buffer member 91 can play a supporting role and enhance the overall rigidity of the first housing 41 and the protective plate 70 at the first gap 701; on the other hand, the first buffer member 91 can play a buffering role. When the first housing 41 is scratched or impacted along the second direction, the first buffer member 91 undergoes compression deformation, which can efficiently absorb and dissipate the impact energy and reduce the energy transmitted to the protective plate 70. The dynamic load peak in the central region is reduced, which greatly reduces the risk of plastic deformation, cracking, or loosening of the connection between the first connection part 71 of the protective plate 70 and the first structural beam 61 due to local stress concentration. It also reduces the insulation and fixing failure of the sampling component or low-voltage communication component in the housing assembly 40, reduces the probability of short circuit, local arcing, and sparking, and reduces the relative displacement between the battery cell 50 and the housing assembly 40. This fundamentally improves the structural reliability of the battery device 100 and enhances its mechanical safety protection capability under harsh working conditions such as scratches or impacts.

[0089] Reference Figure 8 and Figure 9 , Figure 8 for Figure 6 A schematic diagram of the structure of the protective plate 70 shown from one perspective; Figure 9 for Figure 8The enlarged view of part C shown. In some embodiments, the protective plate 70 includes a main body 73, which is disposed opposite to a plurality of battery cells 50 in a first direction, and a first connecting portion 71 is connected to one end of the main body 73 in a second direction.

[0090] The surface of the first buffer member 91 facing away from the first connecting part 71 is flush with the surface of the main body 73 facing away from the battery cell 50. In other words, the surface of the first buffer member 91 facing away from the first connecting part 71 and the surface of the main body 73 facing away from the battery cell 50 are on the same plane, so that both the first buffer member 91 and the main body 73 can support the main body surface of the first housing 41 and connect with the main body surface of the first housing 41.

[0091] In the above technical solution, by setting the side surface of the first buffer 91 away from the first connecting part 71 flush with the side surface of the main body 73 away from the battery cell 50, the first buffer 91 can be effectively filled in the first gap 701, so that the first buffer 91 can be connected with the first connecting part 71 and the first housing 41, thereby reducing the protection blind spot and not affecting the original assembly relationship and spatial layout.

[0092] In some embodiments, the shape of the first buffer 91 is the same as the shape of the first gap 701 so as to match each other. That is, the shape of the first buffer 91 can be designed according to the shape of the first gap 701 so that the projected shape and size of the first buffer 91 along the first direction matches the projected shape and size of the first gap 701 along the first direction.

[0093] In the above technical solution, the shape of the first buffer 91 is set to be the same as the shape of the first gap 701, so that the first buffer 91 and the first gap 701 can match each other, thereby making the first buffer 91 completely fill the first gap 701, thereby reducing the protection blind spot.

[0094] In some embodiments, the first cushioning member 91 includes a rigid foam member.

[0095] Rigid foam is a lightweight, high-performance cushioning and energy-absorbing material. Therefore, in the above technical solution, by setting the first buffer 91 as a rigid foam component, the weight of the battery device 100 is reduced, and the first buffer 91 can play a role in cushioning and auxiliary support. When the first housing 41 is subjected to a scratch impact, on the one hand, the first buffer 91 itself undergoes compression deformation, which can effectively absorb and disperse the impact energy and reduce the stress peak transmitted to the protective plate 70. On the other hand, the first buffer 91 is located between the first housing 41 and the first structural beam 61, which can play an auxiliary support role, thereby enhancing the overall rigidity of the first housing 41 and the protective plate 70 at the first gap 701 and reducing the tendency of deformation. In addition, the first buffer 91 can establish a physical buffer layer between the protective plate 70 and external obstacles, reducing the risk of sharp objects scratching and puncturing the metal plate.

[0096] Reference Figure 8 and Figure 9 In some embodiments, the first connecting portion 71 is provided with a plurality of first structural reinforcement members 81 on the side opposite to the first structural beam 61, the plurality of first structural reinforcement members 81 are arranged at intervals in the length direction of the first structural beam 61, and at least one first buffer member 91 is located between two adjacent first structural reinforcement members 81.

[0097] For example, one or more first buffer members 91 can be arranged between two adjacent first structural reinforcement members 81, so that multiple first structural reinforcement members 81 and first buffer members 91 are arranged continuously in the length direction of the first structural beam 61.

[0098] In the above technical solution, by providing multiple first structural reinforcements 81 on the first connecting part 71, the structural strength of the first connecting part 71 of the protective plate 70 can be improved, thereby enhancing the connection reliability between the protective plate 70 and the first structural beam 61. The first buffer 91 and the first structural reinforcements 81 are arranged in the length direction of the first structural beam 61, so that the protective plate 70 can form continuous and uniform support for the first box 41 at one end in the second direction, transforming it from a "free boundary" to a "supported boundary".

[0099] For example, the first structural reinforcement 81 is a first metal sheet, such as a steel sheet. The protective plate 70 can be made of composite material, and the first structural reinforcement 81 can be a steel sheet to improve the connection strength and reliability between the protective plate 70 and the first structural beam 61.

[0100] For example, the first structural reinforcement 81 and the first connecting part 71 can be bonded together.

[0101] In an embodiment where the protective plate 70 includes a first connecting portion 71 and a main body portion 73, the first structural reinforcement 81 extends at least partially to the connection position between the first connecting portion 71 and the main body portion 73, reducing stress concentration at the connection position. This allows the first structural reinforcement 81 to improve the structural strength of the protective plate 70 and enhance the connection reliability between the first structural beam 61 and the protective plate 70.

[0102] Reference Figure 8 and Figure 9 In some embodiments, the first connecting portion 71 has a first protrusion 711 on the side opposite to the first structural beam 61. In the length direction of the first structural beam 61, the first protrusion 711 is located between two adjacent first structural reinforcements 81, and at least one first buffer 91 is located between the first structural reinforcement 81 and the first protrusion 711.

[0103] In the above technical solution, by providing a first protrusion 711 on the side of the first connecting part 71 away from the first structural beam 61, the structural strength of the first connecting part 71 can be improved, thereby enhancing the deformation resistance of the first connecting part 71 under harsh working conditions such as scratches or impacts encountered by the battery device 100, and thus improving the structural stability and reliability of the battery device 100.

[0104] Reference Figure 8 and Figure 9 In some embodiments, the first connecting portion 71 has a second protrusion 712 on the side opposite to the first structural beam 61, and at least one first structural reinforcement 81 covers the second protrusion 712.

[0105] In the above technical solution, by providing a second protrusion 712 on the side of the first connecting part 71 away from the first structural beam 61, the structural strength of the first connecting part 71 can be further improved, thereby further enhancing the deformation resistance of the first connecting part 71 under harsh working conditions such as scratches or impacts encountered by the battery device 100, and thus improving the structural stability and reliability of the battery device 100.

[0106] Refer to 4 and Figure 5 and further refer to Figure 10 and Figure 11 , Figure 10 for Figure 6 A schematic diagram of the protective plate 70 shown from another perspective; Figure 11 for Figure 10 The enlarged view of part D shown. In some embodiments, the battery device 100 further includes a pressure strip 83 that extends along a second direction and connects the battery cell 50 and the protective plate 70.

[0107] In this configuration, there is a gap 501 between two adjacent battery cells 50 in the second direction, and the pressure strip 83 is at least partially disposed opposite to the gap 501 in the first direction.

[0108] In the above technical solution, by setting the pressure strip 83, the battery cell 50 can be fixed on the one hand, reducing the probability of the battery cell 50 moving around, and on the other hand, the size of the gap 501 between two adjacent battery cells 50 can be kept fixed.

[0109] For example, the pressure strip 83 can be adhesively connected to the protective plate 70, and the side of the pressure strip 83 facing away from the protective plate 70 can be adhesively connected to the battery cell 50. In some embodiments, refer to Figure 11 A cavity 831 extending along the second direction can be provided in the middle of the pressure strip 83 to reduce the weight of the pressure strip 83.

[0110] Reference Figure 10 and Figure 11 In some embodiments, the protective plate 70 has a recess 703 on the side facing the battery cell 50, the recess 703 extends in a second direction, and the pressure strip 83 is disposed in the recess 703.

[0111] In the above technical solution, by providing a recess 703 on the side of the protective plate 70 facing the battery cell 50, the structural strength of the protective plate 70 can be improved, thereby enhancing the deformation resistance of the protective plate 70. On the other hand, the pressure strip 83 can be positioned, improving the connection efficiency and reliability between the pressure strip 83 and the protective plate 70, and reducing the relative displacement between the pressure strip 83 and the protective plate 70.

[0112] Reference Figure 11 In some embodiments, the recess 703 includes a first recess 7031, one end of which extends to the first connecting portion 71. The first connecting portion 71 has a first protrusion 711 on the side opposite to the first structural beam 61. The first protrusion 711 corresponds to a portion of the first recess 7031 at the first connecting portion 71.

[0113] In the length direction of the first structural beam 61, the first protrusion 711 is located between two adjacent first structural reinforcements 81, and at least one first buffer 91 is located between the first structural reinforcement 81 and the first protrusion 711.

[0114] In the above technical solution, by extending the first recess 7031 to the first connecting portion 71 and forming a first protrusion 711 corresponding to the position of the first recess 7031 on the side of the first connecting portion 71 away from the first structural beam 61, the structural strength of the first connecting portion 71 can be improved, thereby enhancing the deformation resistance of the first connecting portion 71 under harsh working conditions such as scratches or impacts encountered by the battery device 100, and thus improving the structural stability and reliability of the battery device 100.

[0115] Reference Figure 11 In some embodiments, the recess 703 includes a second recess 7032, one end of which extends to the first connecting portion 71. The first connecting portion 71 has a second protrusion 712 on the side opposite to the first structural beam 61. The second protrusion 712 corresponds to a portion of the second recess 7032 at the first connecting portion 71.

[0116] In this embodiment, at least one first structural reinforcement 81 covers the second protrusion 712.

[0117] In the above technical solution, by extending the second recess 7032 to the first connecting portion 71 and forming a second protrusion 712 corresponding to the position of the second recess 7032 on the side of the first connecting portion 71 away from the first structural beam 61, the structural strength of the first connecting portion 71 can be improved, thereby further enhancing the deformation resistance of the first connecting portion 71 under harsh working conditions such as scratches or impacts encountered by the battery device 100, and thus improving the structural stability and reliability of the battery device 100.

[0118] Reference Figure 10 and Figure 11 In some embodiments, the protective plate 70 has a plurality of protrusions 731 on the side facing the plurality of battery cells 50. The plurality of protrusions 731 are arranged at intervals along the length direction of the first structural beam 61. The protrusions 731 extend along a second direction for pressing against the busbar components (not shown) on the battery cells 50. The pressure strip 83 is located between two adjacent protrusions 731.

[0119] In the above technical solution, by setting the protrusion 731, the structural strength of the protective plate 70 can be improved, thereby enhancing its resistance to deformation. Furthermore, the protrusion 731 can press against the busbar component, thus fixing it and reducing the likelihood of movement. In addition, the protrusion 731 can position the pressure strip 83, improving the connection efficiency and reliability between the pressure strip 83 and the protective plate 70, and reducing relative displacement between them.

[0120] Reference Figure 6 and Figure 7In some embodiments, the first structural reinforcement 81 is connected to the first structural beam 61 by a first fastener 611, which passes through the first connecting portion 71. That is, the first fastener 611 passes through the first structural reinforcement 81, the first connecting portion 71 of the protective plate 70, and the first structural beam 61.

[0121] In the above technical solution, by setting the first fastener 611, the first structural reinforcement 81, the first connecting part 71 of the protective plate 70 and the first structural beam 61 can be connected together, thereby improving the installation reliability and installation stability of the protective plate 70 and enabling the protective plate 70 to effectively protect multiple battery cells 50.

[0122] For example, there are multiple first structural reinforcement members 81, which are arranged at intervals along the length of the first structural beam 61. Each first structural reinforcement member 81 is connected to the first connecting part 71 and the first structural beam 61 by at least one first fastener 611.

[0123] For example, the first fastener 611 can be a blind rivet, which can provide clear shear positioning and reliable peel strength, thereby enabling the blind rivet to be reliably connected to the first structural beam 61 and the protective plate 70.

[0124] Reference Figure 6 and Figure 7 In some embodiments, the battery cell 50 further includes a second structural beam 62, which is disposed in the receiving space 401 and is arranged at a distance from the first structural beam 61 in a second direction, with a plurality of battery cells 50 located between the first structural beam 61 and the second structural beam 62.

[0125] The protective plate 70 has a second connecting part 72 at the other end in the second direction, and the second connecting part 72 is arranged opposite to and connected to the second structural beam 62 in the first direction.

[0126] Similar to the first structural beam 61, the second structural beam 62 can be a component used to strengthen the structural strength of the housing assembly 40 or to separate the accommodating space 401. The second structural beam 62 can refer to a structure fixedly connected within the housing assembly 40 and used to provide support and restraint for the battery cells 50. The second structural beam 62 can extend along a third direction and be fixedly connected to the side wall of the second housing 42. For example, the second structural beam 62 can be integrally formed with the second housing 42, or it can be fixedly connected to the second housing 42 by welding, bracket connection, or other methods. The second structural beam 62 and the multiple battery cells 50 are arranged in a second direction. The second structural beam 62 can constrain the multiple battery cells 50, reducing the probability of bulging and deformation of the battery cells 50. It can also absorb and disperse the expansion force of the multiple battery cells 50 and transmit the force to the housing assembly 40, thus protecting the multiple battery cells 50 and other components within the housing assembly 40 (such as sampling components).

[0127] In the above technical solution, by setting a first structural beam 61 and a second structural beam 62, and placing multiple battery cells 50 between the first structural beam 61 and the second structural beam 62, the first structural beam 61 and the second structural beam 62 can constrain the multiple battery cells 50, reduce the probability of the battery cells 50 bulging and deforming, and can also absorb and disperse the expansion force of the multiple battery cells 50 and transmit the force to the housing assembly 40, thus protecting the multiple battery cells 50 and other components (such as sampling components) inside the housing assembly 40.

[0128] In some embodiments, in the first direction, there is a second gap (not shown) between the second connecting portion 72 and the first housing 41, and the second gap is filled with a second buffer member 92.

[0129] The second connecting part 72 can be a connecting structure segment formed by integrally extending or fixedly connecting the main body part 73 of the protective plate 70 to the end in the second direction. The second connecting part 72 can be an end integrated structure of the protective plate 70, used to realize the alignment, assembly and fixed connection between the protective plate 70 and the second structural beam 62, and is the force-bearing and connecting carrier at the end of the protective plate 70.

[0130] In the first direction, a second gap exists between the second connecting portion 72 and the first housing 41, which can mean that there is a suspended area between the first housing 41 and the second connecting portion 72. In some embodiments, the main body 73 and the second connecting portion 72 of the protective plate 70 are staggered in the first direction, which can mean that along the first direction, the second connecting portion 72 is closer to the second structural beam 62 relative to the main body 73. It is understood that in related technologies, the height of the second structural beam 62 along the first direction can be lower than the height of the battery cell 50 to reduce the weight of the second structural beam 62, as long as the second structural beam 62 meets the requirements for improving the structural strength of the housing assembly 40 and resisting the expansion force of the battery cell 50. Based on this, the embodiments of this application place the second connecting portion 72 closer to the second structural beam 62 relative to the main body 73, which can reduce the weight of the protective plate 70 while meeting assembly requirements, and further improve the energy density of the battery device 100.

[0131] The second buffer member 92 can be an elastic buffer component filled inside the second gap. The second buffer member 92 can be fitted into the gap space for filling and assembly, used to absorb the expansion and compression force of the battery cell 50, buffer vibration impact, compensate for assembly tolerances, and simultaneously limit the displacement of the end of the protective plate 70, achieving a dual function of deformation buffering and structural limiting. For example, the second buffer member 92 can be bonded to the protective plate 70, and the side of the second buffer member 92 facing away from the protective plate 70 can be bonded to the first housing 41.

[0132] In the above technical solution, by filling the second gap with a second buffer member 92, that is, by placing the second buffer member 92 between the first housing 41 and the second connection portion 72 of the protective plate 70, on the one hand, the second buffer member 92 can play a supporting role, enhancing the overall rigidity of the first housing 41 and the protective plate 70 at the second gap. This allows the protective plate 70 to provide continuous and uniform support to the first housing 41 at the other end in the second direction, transforming it from a "free boundary" to a "supported boundary." On the other hand, the second buffer member 92 can play a buffering role. When the first housing 41 encounters scratches or impacts along the second direction, the second buffer member 92 undergoes compressive deformation, which can... The efficient absorption and dissipation of impact energy reduces the peak dynamic load transmitted to the central area of ​​the protective plate 70. This greatly reduces the risk of plastic deformation, cracking, or loosening of the connection between the second connection 72 of the protective plate 70 and the second structural beam 62 due to local stress concentration. It also reduces the insulation and fixing failure of the sampling components or low-voltage communication components in the housing assembly 40, reduces the probability of short circuits, local arcing, and sparking, and reduces the relative displacement between the battery cell 50 and the housing assembly 40. This fundamentally improves the structural reliability of the battery device 100 and enhances its mechanical safety protection capability under harsh working conditions such as scratches or impacts.

[0133] For example, the second buffer 92 can be bonded to the protective plate 70, and the side of the second buffer 92 facing away from the protective plate 70 can be bonded to the first housing 41.

[0134] Reference Figure 6 and Figure 7 In some embodiments, the second connecting portion 72 is provided with a plurality of second structural reinforcements 82 on the side opposite to the second structural beam 62, the plurality of second structural reinforcements 82 are arranged at intervals in the length direction of the second structural beam 62, and at least one second buffer 92 is located between two adjacent second structural reinforcements 82.

[0135] For example, one or more second buffer members 92 can be arranged between two adjacent second structural reinforcement members 82, so that multiple second structural reinforcement members 82 and second buffer members 92 are arranged continuously in the length direction of the first structural beam 61.

[0136] In the above technical solution, by providing multiple second structural reinforcements 82 on the second connection part 72, the structural strength of the second connection part 72 of the protective plate 70 can be improved, thereby enhancing the connection reliability between the protective plate 70 and the second structural beam 62. The second buffer 92 and the second structural reinforcements 82 are arranged in the length direction of the second structural beam 62, so that the protective plate 70 can provide continuous and uniform support to the first box 41 at the zero and one ends in the second direction.

[0137] For example, the second structural reinforcement 82 is a second metal sheet, such as a steel sheet. The protective plate 70 can be made of composite material, and the second structural reinforcement 82 can be a steel sheet to improve the connection strength and reliability between the protective plate 70 and the second structural beam 62.

[0138] For example, the second structural reinforcement 82 and the second connecting part 72 can be bonded together.

[0139] In some embodiments, the protective plate 70 includes a main body 73, which is disposed opposite to a plurality of battery cells 50 in a first direction, and a second connecting portion 72 is connected to the other end of the main body 73 in a second direction. A second structural reinforcement 82 extends at least partially to the connection point between the second connecting portion 72 and the main body 73, reducing stress concentration at that connection point. This allows the second structural reinforcement 82 to improve the structural strength of the protective plate 70 and enhance the connection reliability between the second structural beam 62 and the protective plate 70.

[0140] In some examples, the surface of the second buffer 92 facing away from the second connecting portion 72 is flush with the surface of the main body 73 facing away from the battery cell 50. That is, the surface of the second buffer 92 facing away from the second connecting portion 72 and the surface of the main body 73 facing away from the battery cell 50 are on the same plane, so that both the second buffer 92 and the main body 73 can support the main body surface of the first housing 41 and connect to the main body surface of the first housing 41.

[0141] In the above technical solution, by setting the side surface of the second buffer 92 away from the second connecting part 72 flush with the side surface of the main body 73 away from the battery cell 50, the second buffer 92 can be effectively filled in the second gap, and the second buffer 92 can be connected with the second connecting part 72 and the first housing 41, thereby reducing the protection blind spot and not affecting the original assembly relationship and spatial layout.

[0142] In some embodiments, there are multiple first buffer members 91, and the multiple first buffer members 91 are arranged in the longitudinal direction of the first structural beam 61.

[0143] In some embodiments, there are multiple second buffer members 92, and the multiple second buffer members 92 are arranged in the longitudinal direction of the second structural beam 62.

[0144] Among them, multiple first buffers 91 and multiple second buffers 92 are positioned in a one-to-one correspondence in the second direction.

[0145] In the above technical solution, by setting multiple first buffers 91 and multiple second buffers 92, the impact resistance of the protective plate 70 at both ends in the second direction can be improved, thereby reducing the peak dynamic load transmitted to the central area of ​​the protective plate 70. This greatly reduces the risk of plastic deformation, cracking or failure of connection with structural beams at both ends of the protective plate 70 due to local stress concentration, reduces the insulation and fixing failure of the sampling component or low-voltage communication component in the housing assembly 40, and reduces the probability of short circuit, local arcing, and sparking.

[0146] In some embodiments, the second buffer 92 is a rigid foam component.

[0147] Rigid foam is a lightweight, high-performance cushioning and energy-absorbing material. Therefore, in the above technical solution, by setting the second buffer 92 as a rigid foam component, the weight of the battery device 100 is reduced, and the second buffer 92 can play a role in cushioning and auxiliary support. When the first housing 41 is subjected to a scratch impact, on the one hand, the second buffer 92 itself undergoes compression deformation, which can effectively absorb and disperse the impact energy and reduce the stress peak transmitted to the protective plate 70. On the other hand, the second buffer 92 is located between the first housing 41 and the second structural beam 62, which can play an auxiliary support role, thereby enhancing the overall rigidity of the first housing 41 and the protective plate 70 at the second gap and reducing the tendency of deformation. In addition, the second buffer 92 can establish a physical buffer layer between the protective plate 70 and external obstacles, reducing the risk of sharp objects scratching and puncturing the metal plate.

[0148] Reference Figure 6 and Figure 7 In some embodiments, the second structural reinforcement 82 is connected to the second structural beam 62 by a second fastener 621, which passes through the second connecting portion 72. That is, the second fastener 621 passes through the second structural reinforcement 82, the second connecting portion 72 of the protective plate 70, and the second structural beam 62.

[0149] For example, there are multiple second structural reinforcement members 82, which are arranged at intervals along the length of the second structural beam 62. Each second structural reinforcement member 82 is connected to the second connection part 72 and the second structural beam 62 by at least one second fastener 621.

[0150] For example, the second fastener 621 can be a blind rivet, which can provide clear shear positioning and reliable peel strength, thereby enabling a reliable connection between the blind rivet and the second structural beam 62 and the protective plate 70.

[0151] According to some embodiments of this application, this application also provides an electrical device, including the battery device 100 described in any of the above embodiments, and the battery device 100 is used to provide electrical energy to the electrical device.

[0152] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0153] In the technical solution of this application embodiment, by adopting the above-mentioned battery device 100, the structural reliability of the electrical device can be improved, and the reliability of the electrical device under harsh working conditions such as scratches or impacts can be enhanced.

[0154] In some embodiments, the electrical device includes a vehicle 1000, a battery device 100 disposed at the bottom of the vehicle 1000, and a first housing 41 disposed on the ground-facing side of a second housing 42.

[0155] The above technical solution can enhance the reliability of vehicle 1000 under harsh working conditions such as bottom scraping.

[0156] Some embodiments of this application provide a battery device 100, which includes a housing assembly 40, a first structural beam 61, a second structural beam 62, a plurality of battery cells 50, and a protective plate 70.

[0157] The housing assembly 40 includes a first housing 41 and a second housing 42. The first housing 41 is connected to one side of the second housing 42 in a first direction, and the first housing 41 and the second housing 42 define an accommodating space 401. A first structural beam 61 and a second structural beam 62 are disposed in the accommodating space 401 and are arranged at intervals in a second direction. The length direction of both the first structural beam 61 and the second structural beam 62 extends along a third direction and are both connected to the second housing 42. A plurality of battery cells 50 are disposed in the accommodating space 401 and located between the first structural beam 61 and the second structural beam 62.

[0158] A protective plate 70 is disposed between multiple battery cells 50 and a first housing 41, and includes a first connecting portion 71, a second connecting portion 72, and a main body 73. The main body 73 covers the multiple battery cells 50 and is bonded to the first housing 41 and the multiple battery cells 50. The first connecting portion 71 and the second connecting portion 72 are respectively connected to the two ends of the main body 73 in a second direction. The first connecting portion 71 is arranged opposite to the first structural beam 61 in the first direction, and the second connecting portion 72 is arranged opposite to the second structural beam 62 in the first direction.

[0159] The first connecting part 71 is provided with a plurality of first structural reinforcement members 81, which are arranged at intervals in the third direction. The first connecting part 71, each first structural reinforcement member 81 and the first structural beam 61 are connected by a first fastener 611. There are a plurality of first gaps 701 between the first connecting part 71 and the first structural beam 61. The plurality of first gaps 701 and the plurality of first structural reinforcement members 81 are arranged in the third direction. Each first gap 701 is filled with a first buffer member 91.

[0160] The second connecting part 72 is provided with a plurality of second structural reinforcements 82, which are arranged at intervals in the third direction. The second connecting part 72, each second structural reinforcement 82 and the second structural beam 62 are connected by a second fastener 621. There are a plurality of second gaps between the second connecting part 72 and the second structural beam 62. The plurality of second gaps and the plurality of second structural reinforcements 82 are arranged in the third direction. Each second gap is filled with a second buffer 92.

[0161] In the above technical solution, by setting multiple first buffers 91 and multiple second buffers 92, the impact resistance of the protective plate 70 at both ends in the second direction can be improved, thereby reducing the peak dynamic load transmitted to the central area of ​​the protective plate 70. This greatly reduces the risk of plastic deformation, cracking or failure of connection with structural beams at both ends of the protective plate 70 due to local stress concentration, reduces the insulation and fixing failure of the sampling component or low-voltage communication component in the housing assembly 40, and reduces the probability of short circuit, local arcing, and sparking.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The housing assembly includes a first housing and a second housing, wherein the first housing is connected to one side of the second housing in a first direction and defines an accommodating space with the second housing; A first structural beam is provided in the accommodating space and is connected to the second box body; Multiple battery cells are disposed in the accommodating space and arranged with the first structural beam in a second direction, the second direction intersecting the first direction; A protective plate is disposed between the plurality of battery cells and the first housing. The protective plate has a first connecting portion at one end in the second direction. The first connecting portion is disposed opposite to and connected to the first structural beam in the first direction. In the first direction, there is a first gap between the first connecting portion and the first housing. The first gap is filled with a first buffer.

2. The battery device according to claim 1, characterized in that, The protective plate includes a main body, which is disposed opposite to a plurality of battery cells in the first direction, and the first connecting part is connected to one end of the main body in the second direction; The surface of the first buffer member facing away from the first connection portion is flush with the surface of the main body facing away from the battery cell.

3. The battery device according to claim 1, characterized in that, The shape of the first buffer is the same as the shape of the first gap, so that they match each other.

4. The battery device according to claim 1, characterized in that, The first connecting portion is provided with a plurality of first structural reinforcement members on the side opposite to the first structural beam. The plurality of first structural reinforcement members are arranged at intervals along the length direction of the first structural beam, and at least one first buffer member is located between two adjacent first structural reinforcement members.

5. The battery device according to claim 4, characterized in that, The first connecting portion has a first protrusion on the side opposite to the first structural beam. In the length direction of the first structural beam, the first protrusion is located between two adjacent first structural reinforcements, and at least one first buffer is located between the first structural reinforcement and the first protrusion.

6. The battery device according to claim 4, characterized in that, The first connecting portion has a second protrusion on the side opposite to the first structural beam, and at least one of the first structural reinforcements covers the second protrusion.

7. The battery device according to claim 4, characterized in that, The battery device also includes: A pressure strip extends along the second direction and connects the battery cell and the protective plate, with a gap between two adjacent battery cells in the second direction, and the pressure strip is at least partially disposed opposite to the gap in the first direction.

8. The battery device according to claim 7, characterized in that, The protective plate has a recess on the side facing the battery cell, the recess extends along the second direction, and the pressure strip is disposed in the recess.

9. The battery device according to claim 8, characterized in that, The recess includes a first recess, one end of which extends to the first connecting portion; The first connecting portion has a first protrusion on the side away from the first structural beam. The first protrusion corresponds to a portion of the first recess at the first connecting portion. In the length direction of the first structural beam, the first protrusion is located between two adjacent first structural reinforcements, and at least one first buffer is located between the first structural reinforcement and the first protrusion.

10. The battery device according to claim 8, characterized in that, The recess includes a second recess, one end of which extends to the first connecting portion; The first connecting portion has a second protrusion on the side opposite to the first structural beam. The second protrusion corresponds to a portion of the second recess at the first connecting portion. At least one of the first structural reinforcing members covers the second protrusion.

11. The battery device according to claim 7, characterized in that, The protective plate has multiple protrusions on one side facing the multiple battery cells. The multiple protrusions are arranged at intervals along the length of the first structural beam. The protrusions extend along the second direction and are used to press against the busbar on the battery cell. The pressure strip is located between two adjacent protrusions.

12. The battery device according to claim 4, characterized in that, The first structural reinforcement is connected to the first structural beam by a first fastener, which passes through the first connection portion.

13. The battery device according to claim 1, characterized in that, Also includes: The second structural beam is disposed in the accommodating space and is spaced apart from the first structural beam in the second direction. A plurality of battery cells are located between the first structural beam and the second structural beam. The protective plate has a second connecting portion at the other end in the second direction. The second connecting portion is disposed opposite to and connected to the second structural beam in the first direction.

14. The battery device according to claim 13, characterized in that, In the first direction, there is a second gap between the second connecting part and the first housing, and the second gap is filled with a second buffer.

15. The battery device according to claim 14, characterized in that, The second connecting part is provided with a plurality of second structural reinforcements on the side opposite to the second structural beam. The plurality of second structural reinforcements are arranged at intervals along the length of the second structural beam, and at least one second buffer is located between two adjacent second structural reinforcements.

16. The battery device according to claim 14, characterized in that, The protective plate includes a main body portion, which is disposed opposite to a plurality of battery cells in the first direction, and the second connecting portion is connected to the other end of the main body portion in the second direction; The second buffer member has a side surface facing away from the second connection portion that is flush with the side surface of the main body facing away from the battery cell.

17. The battery device according to claim 14, characterized in that, The number of first buffers is multiple, and the multiple first buffers are arranged along the length direction of the first structural beam; the number of second buffers is multiple, and the multiple second buffers are arranged along the length direction of the second structural beam, with the multiple first buffers and the multiple second buffers corresponding one-to-one in the second direction.

18. The battery device according to claim 14, characterized in that, Both the first and second buffer components are rigid foam components.

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

20. The electrical appliance according to claim 19, characterized in that, The electrical device includes a vehicle, the battery device is disposed at the bottom of the vehicle, and the first housing is arranged on the ground-facing side of the second housing.

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