Battery device and electric appliance

Abstract

This application provides a battery device and an electrical appliance. The battery device includes: a battery cell; a housing including a first housing portion and a second housing portion stacked along a first direction, both housing the battery cells; the first housing portion including a mounting beam having a hollow cavity, a connecting hole communicating with the hollow cavity, and an operating hole communicating with the hollow cavity, the operating hole being located on a first side wall of the mounting beam, the first side wall being located on the outer side of the housing in a second direction, the second direction being perpendicular to the first direction; a connecting structure configured to enter the hollow cavity through the operating hole and connect the mounting beam to the second housing portion through the connecting hole; a housing cover fastened to the housing along the first direction; and a sealing member connecting the mounting beam and sealing at least a portion of the operating hole. This battery device facilitates the packaging operation of battery devices with multiple stacked battery modules or multiple battery cells; and helps prevent the wall surface of the mounting beam near the battery cells from being eroded.

Description

Technical Field

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

[0002] In related technologies, the packaging operation of battery modules or battery cells in battery devices with multi-layer battery modules or multi-layer battery cells stacked one on the top and one on the bottom is relatively difficult.

[0003] The above statements are for the purpose of providing background information in relation to this application only, and do not necessarily constitute prior art. Summary of the Invention

[0004] The purpose of this application is to provide a battery device and an electrical appliance that reduces the difficulty of packing battery modules or battery cells in a battery device having multi-layer battery modules or multi-layer battery cells stacked vertically.

[0005] This application provides a battery device, comprising: a battery cell; a housing including a first housing portion and a second housing portion stacked along a first direction, both the first housing portion and the second housing portion accommodating the battery cell, the first housing portion including a mounting beam having a hollow cavity, a connecting hole communicating with the hollow cavity, and an operating hole communicating with the hollow cavity, the operating hole being located on a first sidewall of the mounting beam, the first sidewall being located outside the housing in a second direction, the second direction being perpendicular to the first direction; a connecting structure configured to enter the hollow cavity through the operating hole and connect the mounting beam and the second housing portion through the connecting hole; a housing cover fastened to the housing along the first direction; and a sealing member connecting the mounting beam and sealing at least a portion of the operating hole.

[0006] In the battery device of this application embodiment, by configuring the battery device housing as including a first housing portion and a second housing portion arranged in upper and lower layers, multi-layer battery modules or multi-layer battery cells can be packaged and assembled with the first housing portion and the second housing portion of the housing from bottom to top. This reduces the installation stroke of at least some battery modules or battery cells, thereby facilitating the packaging operation of battery modules or battery cells in battery devices with stacked multi-layer battery modules or multi-layer battery cells, and reducing the packaging difficulty. By using a sealing member to close at least part of the operation hole of the mounting beam, it is beneficial to prevent sand and sewage from entering the hollow cavity, thereby preventing abnormal noise or corrosion of the connecting structure and the inner wall of the mounting beam caused by sand and sewage. This helps maintain the strength of the connecting structure, extends the service life of the connecting structure, and also helps prevent the wall surface of the mounting beam near the battery cell from being eroded. It also prevents sand and sewage from entering the battery device from the eroded part, thereby helping to maintain the safety performance of the battery device.

[0007] In some embodiments, the sealing element includes a sealing portion and a snap fastener connected together, the sealing portion closing at least a portion of the operating hole, and the snap fastener engaging with the mounting beam.

[0008] The sealing component includes a connected sealing part and a snap fastener. The snap fastener engages with the mounting beam to detachably connect the sealing component to the mounting beam, enabling the sealing component to quickly seal or quickly open the operating hole.

[0009] In some embodiments, the latch is located within the hollow cavity.

[0010] The buckle is located inside the hollow cavity, making it less prone to damage and less likely to disengage from the mounting beam due to impact, thus facilitating the stable sealing of the sealing component within the operating hole.

[0011] In some embodiments, at least one of the latches includes an elastic portion connected to the sealing portion, the elastic portion being configured to at least partially reset after elastic deformation during the installation of the sealing member in the operating hole to maintain a mating position with the mounting beam.

[0012] The snap fastener includes an elastic part, which is used to install and fix the sealing component in the sealing position, so that the sealing component can stably maintain its sealing function.

[0013] In some embodiments, the elastic portion includes an elastically deformable folding wing, the two ends of which are respectively connected to the sealing portion and the first sidewall, and at least a portion of the folding wing is located in the hollow cavity.

[0014] When the elastic part includes a bendable wing plate that can be elastically deformed, the bendable wing plate structure is simple, easy to implement, and conducive to achieving the elastic function. It also facilitates the quick installation and removal of the sealing component and the stable maintenance of the sealing position in the sealing operation hole.

[0015] In some embodiments, the elastic portion includes an elastic plate, and the buckle further includes a snap-fit ​​seat connected to the blocking portion. The snap-fit ​​seat has a seat hole, and the elastic plate is installed in the seat hole. One end of the elastic plate away from the blocking portion is connected to the hole wall of the seat hole, and the other end of the elastic plate near the blocking portion is connected to the first sidewall.

[0016] When the elastic part includes an elastic plate, the structure of the elastic plate is simple and easy to implement, which is conducive to realizing the elastic function. The elastic plate is located in the seat hole of the snap-fit ​​seat, which is conducive to the snap-fit ​​secure connection to the sealing part, which is conducive to the protection of the elastic plate, reducing the risk of damage to the elastic plate during the installation or storage of the sealing part, and also facilitates the quick installation and disassembly of the sealing part and the stable maintenance of the sealing position in the sealing operation hole.

[0017] In some embodiments, the buckle further includes a protrusion connected to the elastic portion, the protrusion extending from the elastic portion along the surface of the first sidewall in a direction away from the elastic portion, both the elastic portion and the protrusion being located within the hollow cavity, and the protrusion pressing against the inner surface of the first sidewall.

[0018] The latch includes a protrusion connected to the elastic part, which presses against the inner surface of the first sidewall to prevent the latch from separating from the operating hole, thereby facilitating a more stable installation of the sealing element on the mounting beam. Both the elastic part and the protrusion are located within the hollow cavity, which helps maintain the flatness of the surface of the sealing element facing away from the hollow cavity. This prevents damage to the latch and reduces the likelihood of it disengaging from the mounting beam due to impact, thus ensuring a stable seal of the sealing element within the operating hole.

[0019] In some embodiments, along the second direction, the side of the protrusion away from the first sidewall includes a first inclined surface, the first inclined surface extending along the extension direction of the first sidewall to the end of the protrusion away from the elastic portion, and gradually moving towards the first sidewall from the elastic portion towards the side away from the elastic portion along the second direction; and / or along the second direction, the side of the protrusion near the first sidewall includes a second inclined surface, the second inclined surface extending along the extension direction of the first sidewall to the end of the protrusion away from the elastic portion, and gradually moving away from the first sidewall from the elastic portion towards the side away from the elastic portion along the second direction.

[0020] The first inclined surface extends to the end away from the elastic part and gradually approaches the first sidewall from the side away from the elastic part, which facilitates the smooth installation of the sealing component.

[0021] The second inclined surface extends to the end away from the elastic part and gradually moves away from the first sidewall from the elastic part to the side away from the elastic part, which facilitates the smooth removal of the sealing component.

[0022] In some embodiments, the angle between the first acute angle formed by the first inclined surface and the first sidewall is in the range of 30 degrees to 85 degrees; and / or the angle between the second acute angle formed by the second inclined surface and the first sidewall is in the range of 30 degrees to 85 degrees.

[0023] The angle between the first acute angle formed by the first inclined surface and the first sidewall is in the range of 30 degrees to 85 degrees, which is conducive to the rapid installation of the sealing component.

[0024] The angle between the second acute angle formed by the second inclined surface and the first sidewall is in the range of 30 degrees to 85 degrees, which is conducive to the quick disassembly of the sealing component.

[0025] In some embodiments, along the extending direction of the first sidewall, the engagement width of the overlapping portion of the protrusion and the mounting beam is in the range of 1 mm to 1.5 mm.

[0026] The engagement width of the overlapping part between the protrusion and the mounting beam is within the range of 1mm to 1.5mm, which helps the protrusion to stably restrict the sealing element, prevent the sealing element from separating from the operating hole, and facilitates the quick removal of the sealing element from the mounting beam, thus preventing damage to the sealing element during removal.

[0027] In some embodiments, the sealing member includes a sealing portion that closes at least a portion of the operating hole, the sealing portion including a substrate that seals the operating hole, the side of the substrate engaging with the hole wall of the operating hole.

[0028] The sealing part includes a base plate, and the outer surface of the base plate serves as the sealing surface, which can prevent sand and sewage from entering the hollow cavity and reduce the accumulation of sand inside the mounting beam, which could cause abnormal noise or corrosion of the connection structure and the inner wall of the mounting beam.

[0029] In some embodiments, the sealing portion further includes: a first side plate located within the hollow cavity, connected to the side edge of the substrate away from the connecting structure, and engaging with the inner surface of the mounting beam; and / or a second side plate located within the hollow cavity, connected to the side edge of the substrate near the connecting structure, and engaging with the inner surface of the mounting beam.

[0030] The mating of the first side plate with the inner surface of the mounting beam and / or the mating of the second side plate with the inner surface of the mounting beam helps to limit the movement space of the sealing component and the mounting beam in the corresponding direction of the mating position, thereby helping the sealing component to be stably maintained in the sealing position of the sealing operation hole.

[0031] In some embodiments, the second side plate includes a clearance groove that avoids the connection structure.

[0032] The second side plate includes a clearance groove to avoid the connection structure, which facilitates the reasonable setting of the installation structure of the sealing component and the installation beam and makes it easier to install the sealing component in a suitable position, thereby reducing the impact of the connection structure on the installation structure and setting position of the sealing component.

[0033] In some embodiments, the sealing member includes a sealing portion that closes at least a portion of the operating hole, the sealing portion including a mating hole communicating with the hollow cavity.

[0034] The sealing part includes a mating hole, which allows tools to be inserted into the hollow cavity, facilitating the quick installation or removal of the sealing component.

[0035] This application also provides an electrical device, including the aforementioned battery device.

[0036] The electrical equipment of this application embodiment has the advantages of the battery device described in this application embodiment.

[0037] Based on the battery device provided in this application, other features and advantages of this application will become clear from the following detailed description of exemplary embodiments of this application with reference to the accompanying drawings. Attached Figure Description

[0038] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0039] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application.

[0040] Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application, wherein the sealing element is not shown.

[0041] Figure 3 for Figure 2 An exploded view of the battery device of the embodiment shown, in which the sealing element is illustrated.

[0042] Figure 4 for Figure 2 A schematic diagram of the mounting beam in the battery device of the illustrated embodiment, wherein a sealing member of one embodiment is installed at one of the operating holes.

[0043] Figure 5 for Figure 4 A schematic diagram of the sealing component in the embodiment shown.

[0044] Figure 6 for Figure 5 A front view of the sealing component in the illustrated embodiment.

[0045] Figure 7 for Figure 5 A side view of the sealing component in the illustrated embodiment.

[0046] Figure 8 for Figure 5 The bottom view of the sealing component in the illustrated embodiment.

[0047] Figure 9 This is a schematic diagram of the sealing component according to another embodiment.

[0048] Figure 10 for Figure 9 A side view of the sealing component in the illustrated embodiment.

[0049] Figure 11 for Figure 9 A front view of the sealing component in the illustrated embodiment.

[0050] Figure 12 for Figure 9 A top view of the sealing component in the illustrated embodiment.

[0051] Figure 13 for Figure 12 A partial structural diagram showing an enlarged view of the protrusion of the sealing element.

[0052] Figures 1 to 13 In the figures, the labels represent:

[0053] D. Electrical equipment;

[0054] B. Battery device;

[0055] 1. Box body; 11. First box body section; 12. Second box body section; 111. Mounting beam; 111A. Hollow cavity; 111B. Connecting hole; 111C. Operating hole; 111D. First side wall;

[0056] 2. Connection structure;

[0057] 3. Sealing component; 31. Sealing part; 311. Base plate; 311A. Mating hole; 312. First side plate; 313. Second side plate; 313A. Clearance groove; 314. Positioning block; 315. First side plate support part; 316. Third side plate; 317. Reinforcing rib; 32. Buckle; 32A. Connecting end; 32B. Snap-fit ​​end; 321. Elastic part; 3211. Bending wing plate; 3212. Elastic plate; 322. Snap-fit ​​seat; 3221. Seat hole; 323. Protrusion; 3231. First inclined surface; 3232. Second inclined surface; A1. First acute angle; A2. Second acute angle;

[0058] 4. Box lid. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0061] In the description of this application, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0062] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "lateral, longitudinal, vertical, horizontal" and "top, middle, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0063] In this application, the technical term "multiple" refers to two or more, such as two, three, etc.

[0064] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0065] In the process of developing the technical solution of this application, the inventors discovered that the packaging operation of battery modules or battery cells in battery devices with stacked multi-layer battery modules or multi-layer battery cells is quite difficult. Based on this, this application provides a battery device including battery cells, a housing, a connecting structure, a housing cover, and a sealing component. The housing includes a first housing section and a second housing section stacked along a first direction. Both the first and second housing sections contain battery cells. The mounting beam of the first housing section includes a hollow cavity and an operating hole. The connecting structure enters the hollow cavity through the operating hole to connect the mounting beam and the second housing section. This allows for layered packaging and assembly of multi-layer battery modules or multi-layer battery cells with the first and second housing sections from bottom to top, reducing the installation stroke of at least some battery modules or battery cells. This facilitates the packaging operation of battery modules or battery cells in battery devices with stacked multi-layer battery modules or multi-layer battery cells, reducing the packaging difficulty. Furthermore, sealing at least a portion of the operating holes on the mounting beam with sealing components helps prevent sand and sewage from entering the hollow cavity, thereby preventing abnormal noises or corrosion of the connection structure and the inner wall of the mounting beam caused by sand and sewage.

[0066] Furthermore, this application also provides an electrical device that includes the battery device.

[0067] The battery device is configured to provide electrical power to electrical devices. These devices can be, but are not limited to, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0068] Battery devices can be formed in the form of battery packs.

[0069] A battery pack is a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery pack typically includes a housing for enclosing the one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0070] A battery module is a unit comprising multiple individual battery cells, designed to provide higher voltage and capacity. By connecting these cells in parallel or series to form a battery pack, battery modules can meet the power requirements of various applications. Connecting battery cells in series increases the total voltage, while connecting them in parallel increases the total capacity. Battery modules typically also include protective structures to safeguard the multiple battery cells. These protective structures protect the battery pack from damage caused by the external environment.

[0071] A battery cell refers to the smallest unit that makes up a battery. In this application, a battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., but this application is not limited to these types. A battery cell may be flat, cuboid, or other shapes, but this application is not limited to these shapes either. Battery cells are generally packaged as square battery cells and pouch battery cells, but this application is not limited to these shapes either.

[0072] like Figures 2 to 4 As shown, this application embodiment provides a battery device B, which includes: a battery cell, a housing 1, a connecting structure 2, a housing cover 4, and a sealing member 3. The housing 1 includes a first housing portion 11 and a second housing portion 12 stacked along a first direction X, both housing portions 11 and 12 accommodating battery cells. The first housing portion 11 includes a mounting beam 111. The mounting beam 111 has a hollow cavity 111A, a connecting hole 111B communicating with the hollow cavity 111A, and an operating hole 111C communicating with the hollow cavity 111A. A first sidewall 111D is located outside the housing 1 in a second direction Y, which is perpendicular to the first direction X. The operating hole 111C is located on the first sidewall 111D of the mounting beam 111 and communicates with the hollow cavity 111A. The connecting structure 2 is configured to enter the hollow cavity 111A through the operating hole 111C and connect the mounting beam 111 and the second housing portion 12 through the connecting hole 111B. The cover 4 is fastened to the box body 1 along the first direction X, and the sealing member 3 is connected to the mounting beam 111 and closes at least part of the operating hole 111C.

[0073] In the battery device B of this application embodiment, by configuring the housing 1 of the battery device B to include a first housing part 11 and a second housing part 12 arranged in upper and lower layers, multi-layer battery modules or multi-layer battery cells can be packaged and assembled with the first housing part 11 and the second housing part 12 of the housing 1 from bottom to top. This helps to reduce the installation stroke of at least part of the battery modules or battery cells, thereby facilitating the packaging operation of battery modules or battery cells of battery devices with multi-layer battery modules or multi-layer battery cells stacked upper and lower, and reducing the packaging difficulty. Using the sealing member 3 to seal at least part of the operation hole 111C helps to prevent sand and sewage from entering the hollow cavity 111A, thereby preventing abnormal noise or corrosion of the inner wall of the connecting structure 2 and the mounting beam 111 caused by sand and sewage, maintaining the strength of the connecting structure 2, extending the service life of the connecting structure 2, and also preventing the wall surface of the mounting beam 111 near the battery cell from being eroded, preventing sand and sewage from entering the interior of the battery device B from the eroded part, thereby maintaining the safety performance of the battery device B.

[0074] In some embodiments, such as Figures 5 to 12 As shown, the sealing component 3 includes a sealing part 31 and a snap fastener 32 connected to each other. The sealing part 31 closes at least a portion of the operating hole 111C, and the snap fastener 32 engages with the mounting beam 111.

[0075] The sealing component 3 includes a sealing part 31 and a buckle 32 connected to each other. The buckle 32 engages with the mounting beam 111 to detachably connect the sealing component 3 to the mounting beam 111, so that the sealing component 3 can quickly seal the operating hole 111C or quickly open the operating hole 111C.

[0076] In some embodiments, the latch 32 is located within the hollow cavity 111A.

[0077] The buckle 32 is located inside the hollow cavity 111A. The buckle 32 is not easily damaged and is not easily disengaged from the mounting beam 111 due to impact, which facilitates the stable sealing of the sealing component 3 in the operating hole 111C.

[0078] In some embodiments, such as Figures 5 to 12 As shown, the buckle 32 includes an elastic part 321, which is connected to the sealing part 31. The elastic part 321 is configured to at least partially reset after elastic deformation during the installation of the sealing member 3 in the operating hole 111C to maintain the mating position with the mounting beam 111.

[0079] The buckle 32 includes an elastic part 321, which is used to install and fix the sealing member 3 in the sealing position, so that the sealing member 3 can stably maintain the sealing function.

[0080] In some embodiments, such as Figures 5 to 9As shown, the elastic part 321 includes a bendable wing plate 3211 that can be elastically deformed. The two ends of the bendable wing plate 3211, whose relative positions can change with its own elastic deformation, are respectively connected to the sealing part 31 and the first side wall 111D. At least a portion of the bendable wing plate 3211 is located in the hollow cavity 111A.

[0081] When the elastic part 321 includes a bendable wing plate 3211 that can be elastically deformed, the bendable wing plate 3211 has a simple structure, is easy to implement, and facilitates the quick installation and removal of the sealing component 3 as well as its stable maintenance in the sealing position of the sealing operation hole 111C. The bendable wing plate 3211 can be, for example, a V-shaped bendable wing plate, a U-shaped bendable wing plate, a C-shaped bendable wing plate, etc.

[0082] In some embodiments, such as Figures 9 to 13 As shown, the elastic part 321 includes an elastic plate 3212, and the buckle 32 also includes a snap-fit ​​seat 322. The snap-fit ​​seat 322 is connected to the sealing part 31. The snap-fit ​​seat 322 has a seat hole 3221. The elastic plate 3212 is installed in the seat hole 3221. One end of the elastic plate 3212 away from the sealing part 31 is connected to the hole wall of the seat hole 3221, and the other end of the elastic plate 3212 near the sealing part 31 is connected to the first side wall 111D.

[0083] When the elastic part 321 includes the elastic plate 3212, the structure of the elastic plate 3212 is simple and easy to implement, which is conducive to realizing the elastic function. The elastic plate 3212 is located in the seat hole 3221 of the snap-fit ​​seat 322, which is conducive to the snap-fit ​​32 being firmly connected to the sealing part 31, which is beneficial to the protection of the elastic plate 3212, reducing the risk of damage to the elastic plate 3212 during the installation or storage of the sealing member 3, and also facilitates the quick installation and disassembly of the sealing member 3 and its stable maintenance in the sealing position of the sealing operation hole 111C. The elastic plate 3212 is, for example, a flat plate, and in embodiments not shown, it can also be other shapes such as an arc plate.

[0084] In some embodiments, such as Figures 5 to 12 As shown, the buckle 32 also includes a protrusion 323 connected to the elastic portion 321. The protrusion 323 extends from the elastic portion 321 along the surface of the first sidewall 111D in a direction away from the elastic portion 321. Both the elastic portion 321 and the protrusion 323 are located within the hollow cavity 111A, and the protrusion 323 presses against the inner surface of the first sidewall 111D.

[0085] The latch 32 includes a protrusion 323 connected to the elastic part 321. The protrusion 323 presses against the inner surface of the first sidewall 111D, which helps prevent the latch 32 from separating from the operating hole 111C, thereby facilitating a more stable installation of the sealing member 3 on the mounting beam 111. Both the elastic part 321 and the protrusion 323 are located within the hollow cavity 111A, which helps to keep the surface of the sealing member 3 facing away from the hollow cavity 111A flat. The latch 32 is not easily damaged and is not easily disengaged from the mounting beam 111 due to impact, thereby facilitating a stable sealing of the sealing member 3 in the operating hole 111C.

[0086] In some embodiments, such as Figure 8 and Figure 13 As shown, along a direction perpendicular to the first sidewall 111D, the side of the protrusion 323 away from the first sidewall 111D includes a first inclined surface 3231. The first inclined surface 3231 extends along the extension direction of the first sidewall 111D to one end of the protrusion 323 away from the elastic portion 321, and gradually approaches the first sidewall 111D from the elastic portion 321 towards the side away from the elastic portion 321 along the second direction Y; and / or along a direction perpendicular to the first sidewall 111D, the side of the protrusion 323 near the first sidewall 111D includes a second inclined surface 3232. The second inclined surface 3232 extends along the extension direction of the first sidewall 111D to one end of the protrusion 323 away from the elastic portion 321, and gradually moves away from the first sidewall 111D from the elastic portion 321 towards the side away from the elastic portion 321 along the second direction Y.

[0087] The first inclined surface 3231 extends along the extension direction of the first sidewall 111D to the end of the protrusion 323 away from the elastic part 321, and gradually approaches the first sidewall 111D from the elastic part 321 toward the side away from the elastic part 321 along the second direction Y, which facilitates the smooth installation of the sealing member 3.

[0088] The second inclined surface 3232 extends along the extension direction of the first sidewall 111D to the end of the protrusion 323 away from the elastic part 321, and gradually moves away from the first sidewall 111D along the second direction Y from the elastic part 321 to the side away from the elastic part 321, which facilitates the smooth disassembly of the sealing member 3.

[0089] In some embodiments, the angle between the first acute angle A1 formed by the first inclined surface 3231 and the first sidewall 111D is in the range of 30 degrees to 85 degrees; and / or the angle between the second acute angle A2 formed by the second inclined surface 3232 and the first sidewall 111D is in the range of 30 degrees to 85 degrees.

[0090] The angle between the first acute angle A1 formed by the first inclined surface 3231 and the first sidewall 111D is in the range of 30 degrees to 85 degrees, which is conducive to the quick installation of the sealing component 3.

[0091] The angle between the second acute angle A2 formed by the second inclined surface 3232 and the first sidewall 111D is in the range of 30 degrees to 85 degrees, which is conducive to the quick disassembly of the sealing component 3.

[0092] In some embodiments, such as Figure 8 As shown, along the extension direction of the first sidewall 111D, the engagement width W of the overlapping portion of the protrusion 323 and the mounting beam 111 is in the range of 1 mm to 1.5 mm.

[0093] The engagement width W of the overlapping part of the protrusion 323 and the mounting beam 111 is in the range of 1mm to 1.5mm, which is conducive to the protrusion 323 stably restricting the sealing member 3, preventing the sealing member 3 from separating from the operating hole 111C, and at the same time, it is conducive to the quick removal of the sealing member 3 from the mounting beam 111, and to preventing the sealing member 3 from being damaged during removal.

[0094] In some embodiments, such as Figures 5 to 12 As shown, the sealing member 3 includes a sealing part 31 that closes at least part of the operating hole 111C. The sealing part 31 includes a substrate 311 that seals the operating hole 111C. The side of the substrate 311 is engaged with the hole wall of the operating hole 111C.

[0095] The sealing part 31 includes a base plate 311. The outer surface of the base plate 311 serves as a sealing surface, which can prevent sand and sewage from entering the hollow cavity 111A and reduce the accumulation of sand inside the mounting beam 111, which could cause abnormal noise or corrosion of the connection structure 2 and the inner wall of the mounting beam 111.

[0096] In some embodiments, the outer surface of the substrate 311 is flush with the outer surface of the first sidewall 111D.

[0097] The outer surface of the substrate 311 is flush with the outer surface of the first sidewall 111D, making it difficult for the sealing member 3 to fall off, which helps the sealing member 3 to be stably maintained in the sealing position of the sealing operation hole 111C.

[0098] In some embodiments, such as Figures 5 to 8 As shown, the sealing portion 31 further includes a first side plate 312 and / or a second side plate 313. The first side plate 312 is located within the hollow cavity 111A. The first side plate 312 is connected to the edge of the substrate 311 away from the connecting structure 2 and mates with the inner surface of the mounting beam 111. The second side plate 313 is located within the hollow cavity 111A. The second side plate 313 is connected to the edge of the substrate 311 near the connecting structure 2 and mates with the inner surface of the mounting beam 111.

[0099] The first side plate 312 and the inner surface of the mounting beam 111 are fitted together, and / or the second side plate 313 and the inner surface of the mounting beam 111 are fitted together, which helps to limit the movement space of the sealing member 3 and the mounting beam 111 in the corresponding direction of the mating part, thereby helping the sealing member 3 to be stably maintained in the sealing position of the sealing operation hole 111C.

[0100] In some embodiments, such as Figure 5 , Figure 6 and Figure 8 As shown, the second side plate 313 includes a clearance groove 313A for the clearance connection structure 2.

[0101] The second side plate 313 includes a clearance groove 313A that avoids the connection structure 2, which facilitates the reasonable setting of the installation structure of the sealing component 3 and the installation beam 111 and facilitates the installation of the sealing component 3 in a suitable position, thereby reducing the influence of the connection structure 2 on the installation structure and setting position of the sealing component 3.

[0102] In some embodiments, such as Figures 5 to 11 As shown, the sealing member 3 includes a sealing part 31 that closes at least part of the operating hole 111C. The sealing part 31 includes a mating hole 311A ​​that communicates with the hollow cavity 111A.

[0103] The sealing part 31 includes a mating hole 311A, which is used to allow a tool to be inserted into the hollow cavity 111A, facilitating the quick installation or removal of the sealing part 3.

[0104] This application embodiment also provides an electrical device D, such as... Figure 1 As shown, the electrical device D includes the battery device B according to an embodiment of this application.

[0105] The electrical device D in this application embodiment has the advantages of the battery device B in this application embodiment.

[0106] The following is combined Figures 1 to 13 The structure of the battery device B and the electrical device D of some embodiments of this application will be described in more detail.

[0107] Figure 1 The diagram shows the structure of an electrical device provided in some embodiments of this application. Figure 1 As shown, the electrical equipment is a vehicle. The vehicle 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. Figure 2 The vehicle is equipped with a battery unit B, which can be located at the bottom, front, or rear of the vehicle. Battery unit B can be used to power the vehicle, for example, as its operating power source.

[0108] In some embodiments of this application, the battery device B can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0109] In this embodiment of the application, the first direction X corresponds to... Figure 2 and Figure 3 The height direction of the battery device B also corresponds to the vertical direction described later. The second direction Y is perpendicular to the first direction X, corresponding to... Figure 2 and Figure 3 The width direction of the battery device B also corresponds to the front-to-back direction described later. The third direction Z is perpendicular to the first direction X and the second direction Y, corresponding to... Figure 2 and Figure 3 The length direction of the battery device B also corresponds to the left-right direction mentioned in the following description.

[0110] like Figure 2 and Figure 3 As shown, the battery device B is in the form of a battery pack, including a battery box and battery modules. The battery box includes a box body 1 and a box cover 4. The box body 1 includes a first box section 11 and a second box section 12 that are stacked vertically and fixedly connected. Battery modules are disposed inside both the first box section 11 and the second box section 12. The battery module includes multiple battery cells. The box cover 4 is fastened to the top of the box body 1.

[0111] like Figure 3 and Figure 4 As shown, the first housing portion 11 includes a mounting beam 111. The mounting beam 111 includes a hollow cavity 111A and an operating hole 111C. The operating hole 111C communicates with the hollow cavity 111A. The operating hole 111C is provided on a first side wall 111D of the mounting beam 111 located on the outer side of the housing 1 in the width direction of the battery box, for installing or removing the connecting structure 2, and for allowing disassembly tools to enter and exit the hollow cavity 111A when installing or removing the connecting structure 2, and for providing operating space for the disassembly tools. The mounting beam 111 and its first side wall 111D extend along their length direction. The connecting structure 2 includes, for example, bolts and washers. The mounting beam 111 also includes a connecting hole 111B, which is provided inside the hollow cavity 111A and communicates with the hollow cavity 111A, located on the bottom wall of the mounting beam 111. The connecting structure 2 fixes the mounting beam 111 to the corresponding box beam of the second box section 12 located below it, thereby fixing the mounting beam 111 and assembling the first box section 11 and the second box section 12.

[0112] The battery device B also includes a sealing element 3, which engages with the mounting beam 111 to seal the operating holes 111C. The mounting beam 111 includes multiple operating holes 111C corresponding to multiple connecting structures 2, and each operating hole 111C is sealed by the sealing element 3.

[0113] like Figures 5 to 8 The sealing member 3 shown in one embodiment includes a sealing part 31 and four clips 32.

[0114] The sealing part 31 includes a base plate 311, a first side plate 312, a second side plate 313, a positioning block 314, and a first side plate support part 315.

[0115] The substrate 311 is sealed in the operating hole 111C. The sidewall of the substrate 311 is fitted with the hole wall of the operating hole 111C.

[0116] The first side plate 312 is located inside the hollow cavity 111A. One end is connected to the top of the substrate 311, and the other end away from the substrate 311 is engaged with the inner surface of the second side wall of the mounting beam 111, which is opposite to the first side wall 111D of the operating hole 111C, to prevent the upper end of the sealing member 3 from entering the hollow cavity 111A beyond the engagement position with the operating hole 111C. The top surface of the first side plate 312 is engaged with the inner surface of the top wall of the mounting beam 111, so that the sealing member 3 can be quickly positioned and installed in the mounting beam 111 and installed more firmly on the mounting beam 111.

[0117] The first side plate support 315 is disposed at the connection between the first side plate 312 and the substrate 311 to improve the connection strength between the first side plate 312 and the substrate 311 and to improve the stability of the sealing member 3 when sealing the operation hole 111C.

[0118] The second side plate 313 is disposed at the bottom of the base plate 311. The bottom surface of the second side plate 313 mates with the inner surface of the bottom wall of the mounting beam 111, so that the sealing member 3 can be quickly positioned and installed in the mounting beam 111 and installed more firmly on the mounting beam 111.

[0119] A clearance groove 313A is provided on the second side plate 313, extending to the bottom edge of the substrate 311, to avoid the connection structure 2. A positioning block 314 is located above the second side plate 313, and has a notch corresponding to the clearance groove 313A. This notch avoids the bolt head of the bolt in the connection structure 2, thus providing a positioning function relative to the bolt head. This helps prevent the sealing member 3 from being improperly installed due to interference with the bolt head and prevents the lower end of the sealing member 3 from entering the hollow cavity 111A beyond the mating position with the operating hole 111C. The clearance groove 313A, located on the second side plate 313 and extending to the bottom edge of the substrate 311, avoids the gasket in the connection structure 2, preventing interference between the sealing part 31 and the gasket, thus avoiding improper installation.

[0120] Four latches 32 are located within the hollow cavity 111A, arranged at intervals along the side of the sealing portion 31 and connected to the sealing portion 31. Each latch 32 engages with the mounting beam 111. In this embodiment, the four latches 32 are symmetrically distributed on both sides of the sealing portion 31 in the left-right direction.

[0121] The latch 32 includes an elastic portion 321 and a protrusion 323. The elastic portion 321 includes a connecting end 32A and a snap-fit ​​end 32B. The connecting end 32A connects to the sealing member 3, and the snap-fit ​​end 32B connects to the protrusion 323, which mates with the mounting beam 111, to achieve the connection between the latch and the mounting beam 111. The elastic portion 321 is configured to at least partially return to its original position after deformation during the installation of the sealing member 3 into the operating hole 111C, so as to maintain its mating position with the mounting beam 111.

[0122] The elastic part 321 is an elastically deformable bending wing plate 3211. In this embodiment, the bending wing plate 3211 is a V-shaped bending wing plate. The bending wing plate 3211 has a closed end and an open end opposite to the closed end. The open end is opposite to the first sidewall 111D. The two ends of the open end of the bending wing plate 3211 form two ends of the bending wing plate 3211 whose relative positions can change with its own elastic deformation, namely, forming the connecting end 32A and the snap-fit ​​end 32B of the elastic part 321. The connecting end 32A is connected to the base plate 311 of the sealing part 31, and the snap-fit ​​end 32B is connected to the protrusion 323 that mates with the inner surface of the first sidewall 111D.

[0123] The protrusion 323 extends from the elastic portion 321 along the extension direction of the first sidewall 111D in a direction away from the elastic portion 321, and the protrusion 323 is pressed against the inner surface of the first sidewall 111D.

[0124] Along a direction perpendicular to the first sidewall 111D, i.e., the second direction Y, the side of the protrusion 323 away from the mounting beam 111 on the first sidewall 111D includes a first inclined surface 3231. The first inclined surface 3231 extends along the extending direction of the first sidewall 111D to the end of the protrusion 323 away from the elastic portion 321, and gradually approaches the first sidewall 111D along the second direction Y from the elastic portion 321 towards the side away from the elastic portion 321. Figure 8 As shown, the angle A1 formed by the first acute angle between the first inclined surface 3231 and the first sidewall 111D is 45 degrees; the engagement width W of the overlapping part of the protrusion 323 and the mounting beam 111 is 1.5 mm.

[0125] The sealing part 31 includes a mating hole 311A ​​communicating with the hollow cavity 111A. In this embodiment, four mating holes 311A ​​are respectively provided corresponding to the four latches 32. Each mating hole 311A ​​is provided at the edge of the substrate 311. The connecting end 32A of the elastic part 321 of each latch 32 is connected to the edge of the corresponding mating hole 311A.

[0126] In this embodiment, when the sealing member 3 is installed on the mounting beam 111, the side of the sealing member 3 with the buckles 32 is pushed into the operating hole 111C with the hollow cavity 111A facing it. Because the bending wing plate 3211 can deform, the elastic portions 321 and protrusions 323 of the four buckles 32 can smoothly pass through the operating hole 111C, thereby pushing the buckles 32 into the hollow cavity 111A. After the protrusions 323 enter the operating hole 111C, they are positioned outside the hole wall of the operating hole 111C under the action of the bending wing plate 3211, causing the protrusions 323 to press against the inner surface of the first side wall 111D, thus achieving the engagement of the sealing member 3 with the mounting beam 111 and completing the installation of the sealing member 3.

[0127] When disassembling the sealing component 3 from the mounting beam 111, a disassembly tool with four gripping fingers can be used. The four gripping fingers simultaneously insert into the four mating holes 311A ​​corresponding to the four latches 32, and each finger applies force in the left-right direction to the portion of each bent wing plate 3211 connected to the base plate 311, moving inwards towards the base plate 311. This causes the portion of each bent wing plate 3211 connected to the base plate 311 to move inwards towards the base plate 311 in the left-right direction, causing the protrusion 323 to move inwards towards the base plate 311 in the left-right direction until it disengages from the mounting beam 111. The disassembly tool can then pull the sealing component 3 out of the operating hole 111C, thus disassembling the sealing component 3. In this embodiment, the disassembly tool can be specially prepared to improve the efficiency of disassembling the sealing component 3.

[0128] like Figures 9 to 13 The sealing member 3 shown in another embodiment includes a sealing part 31 and four latches 32.

[0129] The sealing part 31 includes a base plate 311, a first side plate 312, a third side plate 316, and a reinforcing rib 317.

[0130] The substrate 311 is sealed in the operating hole 111C. The sidewall of the substrate 311 is fitted with the hole wall of the operating hole 111C.

[0131] The first side plate 312 is located inside the hollow cavity 111A, with one end connected to the top of the substrate 311, and the other end away from the substrate 311 is spaced apart from the inner surface of the second side wall of the mounting beam 111, which is opposite to the first side wall 111D where the operation hole 111C is provided. The top surface of the first side plate 312 mates with the inner surface of the top wall of the mounting beam 111.

[0132] The third side plate 316 is located within the hollow cavity 111A. The third side plate 316 has the same width as the first side plate 312. The two third side plates 316 are respectively connected to the left and right edges of the substrate 311, and the top ends of the two third side plates 316 are respectively connected to the left and right ends of the first side plate 312, with a rounded transition between them. The third side plate 316 is used to improve the connection strength between the first side plate 312 and the substrate 311, as well as the overall strength of the sealing part 31, and to improve the stability of the sealing member 3 when sealing the operation hole 111C.

[0133] The sealing part 31 includes a mating hole 311A ​​communicating with the hollow cavity 111A. The mating hole 311A ​​is provided at the bottom edge of the substrate 311. The mating hole 311A ​​is used to insert a disassembly tool when removing the sealing part 3.

[0134] The latches 32 are located inside the hollow cavity 111A, and are arranged at intervals along the side of the substrate 311 and connected to the substrate 311. Each latch 32 engages with the mounting beam 111. In this embodiment, the four latches 32 are arranged symmetrically on the left and right edges of the substrate 311.

[0135] The buckle 32 includes an elastic part 321, a snap-fit ​​seat 322, and a protrusion 323.

[0136] The elastic portion 321 includes an elastic plate 3212. The elastic plate 3212 is a flat plate in its natural state when not subjected to external force. A snap-fit ​​seat 322 is connected to the base plate 311 and the third side plate 316 of the sealing portion 31. Each third side plate 316 is connected to the snap-fit ​​seats 322 of two latches 32 on the same side. The snap-fit ​​seat 322 includes a flat plate extending from one side of the base plate 311 toward the side away from the base plate 311. The outer surface of the flat plate is flush with the side surface of the base plate 311 and the outer surface of the third side plate 316. A seat hole 3221 is provided on the flat plate. The elastic plate 3212 is installed in the seat hole 3221. Opposite ends of the elastic plate 3212 in the longitudinal direction form a connecting end 32A and a snap-fit ​​end 32B of the elastic portion 321. The end away from the sealing portion 31 forms a connecting end 32A, which is connected to the wall of the seat hole 3221 of the snap-fit ​​seat 322 on the side away from the sealing portion 31. The mounting bracket 322 also includes a mounting bracket support plate that connects the flat plate portion and the substrate 311. The mounting bracket support plate is connected between the substrate 311 and the inner side surface of the flat plate portion. The mounting bracket support plate is triangular. One mounting bracket support plate is provided at each of the upper and lower ends of the flat plate portion.

[0137] One end of the elastic plate 3212 near the sealing portion 31 forms a snap-fit ​​end 32B. A protrusion 323 of the latch 32 connects to the snap-fit ​​end 32B of the elastic plate 3212. The protrusion 323 is pressed against the inner surface of the first sidewall 111D of the mounting beam 111 where the operating hole 111C is located. Along a direction perpendicular to the first sidewall 111D, i.e., the second direction Y, the side of the protrusion 323 away from the first sidewall 111D includes a first inclined surface 3231, and the side near the first sidewall 111D includes a second inclined surface 3232. The first inclined surface 3231 extends along the extension direction of the first sidewall 111D to the end of the protrusion 323 away from the elastic portion 321, and gradually approaches the first sidewall 111D along the second direction Y from the side away from the elastic portion 321. The second inclined surface 3232 extends to one end away from the elastic portion 321 and gradually moves away from the first sidewall 111D from the elastic portion 321 toward the side away from the elastic portion 321. Wherein, as Figure 13 As shown, the first acute angle A1 formed by the first inclined surface 3231 and the first sidewall 111D is 30 degrees. The second acute angle A2 formed by the second inclined surface 3232 and the first sidewall 111D is 60 degrees. The engagement width of the overlapping portion of the protrusion 323 and the mounting beam 111 is 1.2 mm.

[0138] Two reinforcing ribs 317 are connected to the inner surface of the substrate 311 and extend in the left-right direction. The two reinforcing ribs 317 are respectively connected to the snap-fit ​​support plates of the snap-fit ​​seats 322 of the two opposing snap-fit ​​seats 32 located at the bottom. The space formed by the two snap-fit ​​seats 322 and the reinforcing ribs 317 can avoid the connection structure 2. The reinforcing ribs 317 can improve the overall strength of the sealing member 3, which is conducive to the stable sealing of the operating hole 111C by the sealing member 3.

[0139] In this embodiment, when the sealing member 3 is installed on the mounting beam 111, the side with the snap-fit ​​seat 322 is pushed into the operating hole 111C with the hollow cavity 111A facing it. Because the elastic plate 3212 can deform, the protrusions 323 of the four snap fasteners 32 can enter the operating hole 111C. After the protrusions 323 enter the operating hole 111C, they are positioned outside the hole wall of the operating hole 111C under the action of the elastic plate 3212, pressing against the inner surface of the first side wall 111D, thus achieving the engagement of the sealing member 3 with the mounting beam 111 and completing the installation of the sealing member 3.

[0140] When removing the sealing component 3 from the mounting beam 111, a disassembly tool that mates with the mating hole 311A ​​can be used. The head of the disassembly tool extends into the mating hole 311A ​​and applies upward and outward force to the edge of the base plate 311 above the mating hole 311A ​​of the sealing component 3. This causes each elastic plate 3212 to deform. One end of the elastic plate 3212 connected to the protrusion 323 moves inward toward the left and right direction of the base plate 311, driving each protrusion 323 to move inward toward the left and right direction of the base plate 311 until each protrusion 323 is disengaged from the mounting beam 111. Then, the disassembly tool can remove the sealing component 3 from the operating hole 111C, thus removing the sealing component 3. In this embodiment, the disassembly tool does not need to be specially prepared; for example, a flathead screwdriver can be used as the disassembly tool.

[0141] The battery device B of this embodiment includes a housing 1 comprising a first housing section 11 and a second housing section 12 stacked and fixedly connected in a vertical direction. This arrangement allows the housing 1 to be layered vertically, enabling the lower battery modules or individual cells to be assembled into the second housing section 12 during installation. After the lower battery modules or individual cells are installed in the second housing section 12, a connecting structure 2 connects the mounting beam 111 to the corresponding beam of the second housing section 12 below the mounting beam 111, thus assembling the first housing section 11 onto the second housing section 12. Then, battery modules or individual cells are installed within the first housing section 11. After all battery modules or individual cells are installed, the housing cover 4 is closed. The sealing members 3 are then installed at the operating holes 111C of the mounting beam 111. The battery device B provided in this application reduces the installation stroke of some battery modules or battery cells, making it easier to pack the battery modules or battery cells of the battery device B with multi-layer battery modules or multi-layer battery cells stacked vertically, thus reducing the difficulty of packing.

[0142] 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 preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A battery device (B), characterized in that, include: Battery cell; The housing (1) includes a first housing part (11) and a second housing part (12) stacked along a first direction (X). Both the first housing part (11) and the second housing part (12) contain the battery cells. The first housing part (11) includes a mounting beam (111). The mounting beam (111) has a hollow cavity (111A), a connecting hole (111B) communicating with the hollow cavity (111A), and an operating hole (111C) communicating with the hollow cavity (111A). The operating hole (111C) is located on a first side wall (111D) of the mounting beam (111). The first side wall (111D) is located outside the housing (1) in a second direction (Y). The second direction (Y) is perpendicular to the first direction (X). The connecting structure (2) is configured to enter the hollow cavity (111A) through the operating hole (111C) and connect the mounting beam (111) and the second box part (12) through the connecting hole (111B). The lid (4) is fastened to the box body (1) along the first direction (X); and The sealing element (3) connects the mounting beam (111) and closes at least a portion of the operating hole (111C).

2. The battery device (B) according to claim 1, characterized in that, The sealing element (3) includes a sealing part (31) and a buckle (32) connected to each other. The sealing part (31) closes at least a portion of the operating hole (111C), and the buckle (32) engages with the mounting beam (111).

3. The battery device (B) according to claim 2, characterized in that, The buckle (32) is located inside the hollow cavity (111A).

4. The battery device (B) according to claim 2, characterized in that, The buckle (32) includes an elastic part (321) connected to the sealing part (31). The elastic part (321) is configured to at least partially reset after elastic deformation during the installation of the sealing member (3) in the operating hole (111C) to maintain the mating position with the mounting beam (111).

5. The battery device (B) according to claim 4, characterized in that, The elastic part (321) includes a bendable wing plate (3211) that can be elastically deformed. The two ends of the bendable wing plate (3211), whose relative positions can change with its own elastic deformation, are respectively connected to the sealing part (31) and the first sidewall (111D). At least a portion of the bendable wing plate (3211) is located in the hollow cavity (111A).

6. The battery device (B) according to claim 4, characterized in that, The elastic part (321) includes an elastic plate (3212), and the buckle (32) also includes a snap-fit ​​seat (322). The snap-fit ​​seat (322) is connected to the blocking part (31). The snap-fit ​​seat (322) has a seat hole (3221). The elastic plate (3212) is installed in the seat hole (3221). One end of the elastic plate (3212) away from the blocking part (31) is connected to the hole wall of the seat hole (3221). The end of the elastic plate (3212) near the blocking part (31) is connected to the first side wall (111D).

7. The battery device (B) according to claim 4, characterized in that, The buckle (32) also includes a protrusion (323) connected to the elastic part (321). The protrusion (323) extends from the elastic part (321) along the surface of the first sidewall (111D) in a direction away from the elastic part (321). Both the elastic part (321) and the protrusion (323) are located in the hollow cavity (111A), and the protrusion (323) presses against the inner surface of the first sidewall (111D).

8. The battery device (B) according to claim 7, characterized in that, Along the second direction (Y), the side of the protrusion (323) away from the first sidewall (111D) includes a first inclined surface (3231), the first inclined surface (3231) extending along the extension direction of the first sidewall (111D) to one end of the protrusion (323) away from the elastic portion (321), and gradually approaching the first sidewall (111D) along the second direction (Y) from the elastic portion (321) toward the side away from the elastic portion (321); and / or Along the second direction (Y), the protrusion (323) near the first sidewall (111D) includes a second inclined surface (3232), the second inclined surface (3232) extending along the extension direction of the first sidewall (111D) to one end of the protrusion (323) away from the elastic part (321), and gradually moving away from the first sidewall (111D) along the second direction (Y) from the elastic part (321) towards the side away from the elastic part (321).

9. The battery device (B) according to claim 8, characterized in that, The angle between the first acute angle (A1) formed by the first inclined surface (3231) and the first sidewall (111D) is in the range of 30 degrees to 85 degrees; and / or The angle between the second acute angle (A2) formed by the second inclined surface (3232) and the first sidewall (111D) is in the range of 30 degrees to 85 degrees.

10. The battery device (B) according to claim 7, characterized in that, Along the extension direction of the first sidewall (111D), the engagement width W of the overlapping portion of the protrusion (323) and the mounting beam (111) is in the range of 1 mm to 1.5 mm.

11. The battery device (B) according to any one of claims 1 to 10, characterized in that, The sealing member (3) includes a sealing part (31) that closes at least part of the operating hole (111C), the sealing part (31) including a base plate (311) that seals the operating hole (111C), the side of the base plate (311) engaging with the hole wall of the operating hole (111C).

12. The battery device (B) according to claim 11, characterized in that, The sealing part (31) also includes: The first side plate (312), located within the hollow cavity (111A), is connected to the edge of the substrate (311) away from the connecting structure (2) and mates with the inner surface of the mounting beam (111); and / or The second side plate (313) is located inside the hollow cavity (111A), connected to the side edge of the substrate (311) near the connecting structure (2), and mates with the inner surface of the mounting beam (111).

13. The battery device (B) according to claim 12, characterized in that, The second side plate (313) includes a clearance groove (313A) that avoids the connecting structure (2).

14. The battery device (B) according to any one of claims 1 to 10, characterized in that, The sealing member (3) includes a sealing part (31) that closes at least part of the operating hole (111C), the sealing part (31) including a mating hole (311A) that communicates with the hollow cavity (111A).

15. An electrical appliance (D), characterized in that, Includes the battery device (B) according to any one of claims 1 to 14.

Images