Battery device, battery case, and electric appliance

Abstract

The application discloses a battery device, a battery box and an electric equipment. The battery device comprises a battery monomer and a battery box. The battery box comprises a box assembly, a bottom guard plate assembly and a locking assembly. The box assembly is formed with an accommodating space for accommodating the battery monomer. The bottom guard plate assembly is arranged at the bottom of the box assembly and away from the accommodating space. The bottom guard plate assembly is provided with a fixing hole. The locking assembly is at least partially arranged between the box assembly and the bottom guard plate assembly and is used for detachably connecting the bottom guard plate assembly and the box assembly. At least part of the locking assembly is inserted into the fixing hole. One end of the locking assembly, which is away from the box assembly, extends to the outside of one end of the fixing hole, which is away from the box assembly. The radial dimension of the locking assembly along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole. According to the application, the bottom guard plate assembly and the box assembly are detachably connected through the locking assembly, the detachability between the box assembly and the bottom guard plate assembly is realized, and the difficulty of detaching the bottom guard plate assembly is reduced.

Description

Technical Field

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

[0002] Battery units are typically located at the bottom of electrical equipment. The battery housing usually includes a housing assembly and a bottom protective plate. The bottom protective plate is usually located on the outside of the bottom of the housing assembly to improve the bottom of the housing assembly's resistance to impact and compression, thereby reducing the risk of battery unit damage due to impact or compression at the bottom of the electrical equipment during operation.

[0003] In related technologies, the bottom guard plate is usually fixedly connected to the bottom of the box assembly on the side facing away from the containment space, and a rigid connection interface is formed between the bottom guard plate and the box assembly, which makes it difficult to disassemble the bottom guard plate. Utility Model Content

[0004] In view of the above problems, this application provides a battery device, a battery housing, and electrical equipment, which can reduce the difficulty of disassembling the bottom protection plate assembly.

[0005] In a first aspect, this application provides a battery device, which includes a battery cell and a battery housing. The battery housing includes: a housing assembly having a receiving space for accommodating the battery cell; a bottom protective plate assembly disposed on the bottom of the housing assembly facing away from the receiving space, the bottom protective plate assembly having a fixing hole; and a locking assembly at least partially disposed between the housing assembly and the bottom protective plate assembly for detachably connecting the bottom protective plate assembly and the housing assembly; wherein at least a portion of the locking assembly is inserted into the fixing hole, the end of the locking assembly facing away from the housing assembly extends beyond the end of the fixing hole facing away from the housing assembly, and the radial dimension along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole. The bottom guard plate assembly and the box assembly are detachably connected by a locking component, which enables the box assembly and the bottom guard plate assembly to be disassembled, thereby reducing the difficulty of disassembling the bottom guard plate assembly. Furthermore, the end of the locking component opposite to the box assembly extends to the end of the fixing hole opposite to the box assembly, and the radial dimension along the fixing hole is larger than the radial dimension of the fixing hole. This can lock the bottom guard plate assembly to the side of the box assembly that is away from the locking component and close to the box assembly, and can limit the range of axial movement of the bottom guard plate assembly along the fixing hole, thereby enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0006] In some embodiments, the locking assembly includes a locking member, which includes: a plug portion, at least partially disposed within a fixing hole, and one end of the plug portion being directly or indirectly detachably connected to the housing assembly; and a limiting portion, connected to the other end of the plug portion and located outside the fixing hole at the end opposite to the housing assembly, wherein the maximum radial dimension of the limiting portion along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole. By directly or indirectly detachably connecting one end of the plug-in portion to the box assembly, the bottom guard plate assembly can be separated from the box assembly simply by directly or indirectly separating one end of the plug-in portion during disassembly, thus reducing the difficulty of disassembly. Furthermore, by connecting the limiting portion to the other end of the plug-in portion and placing it outside the end of the fixing hole away from the box assembly, and by making the maximum radial dimension of the limiting portion along the fixing hole greater than the radial dimension of the fixing hole, the bottom guard plate assembly can be locked to the side of the limiting portion near the box assembly, and the range of axial movement of the bottom guard plate assembly along the fixing hole can be limited, thereby enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0007] In some embodiments, the locking assembly includes a fixing plate connected to the housing assembly, with the side of the fixing plate facing away from the housing assembly connected to the insertion portion; wherein the fixing plate is detachably connected to the housing assembly and / or the insertion portion is detachably connected to the fixing plate. The fixing plate disperses the stress of the locking element onto the housing assembly, reducing the risk of fatigue deformation or breakage of the locking element and the bottom guard plate assembly, and further enhancing the connection strength and stability between the bottom guard plate assembly and the housing assembly.

[0008] In some embodiments, the underbody panel assembly has a first recessed groove on the side facing the battery pack assembly, which is recessed relative to the surface of the underbody panel assembly. The first recessed groove communicates with a fixing hole, and a fixing plate is disposed within the first recessed groove. By providing a first recessed groove communicating with a fixing hole on the side of the underbody panel assembly facing the battery pack assembly and disposing of the fixing plate within the first recessed groove, on the one hand, the provision of the first recessed groove can reduce the weight of the underbody panel assembly, thereby reducing the overall weight of the battery pack. This reduces the impact of the battery pack's weight on the vehicle's energy consumption and range when the battery pack is used as a battery device. On the other hand, disposing of the fixing plate within the first recessed groove can reduce the dimensions of the battery pack from top to bottom. This increases the distance between the underbody panel assembly and the ground when the battery pack is used as a battery device in a vehicle, thereby reducing the risk of the vehicle scraping or colliding with the road surface or other obstacles and improving the reliability of the battery device.

[0009] In some embodiments, the bottom cover assembly includes a bottom cover disposed on the bottom of the housing assembly on the side facing away from the receiving space, and mounting holes are provided on the bottom cover. By providing mounting holes on the bottom cover for insertion of the plug-in portion, the bottom cover can be easily connected to the housing assembly, which simplifies the installation structure of the bottom cover and improves the efficiency of installation and disassembly of the bottom cover.

[0010] In some embodiments, the bottom guard plate has a second recessed groove on the side facing away from the box assembly, which is recessed relative to the surface of the bottom guard plate. The second recessed groove is connected to the fixing hole, and the limiting part is disposed in the second recessed groove. By providing a second recessed groove with a connecting fixing hole on the side of the bottom guard plate facing away from the battery pack assembly, the limiting part is placed within the second recessed groove. On the one hand, the second recessed groove can guide the insertion part through and into the fixing hole, reducing the difficulty of insertion. On the other hand, the second recessed groove can reduce the weight of the bottom guard plate, thereby reducing the overall weight of the battery pack. It can also hide the limiting part within the bottom guard plate, thereby reducing the thickness of the battery pack from top to bottom. When the battery pack is used as a battery device in a vehicle, it can reduce the impact of the battery device's weight on the vehicle's energy consumption and range. It can also increase the distance between the bottom guard plate and the ground, thereby reducing the risk of the vehicle scraping or colliding with the road or other obstacles. Thirdly, it makes the surface of the bottom guard plate facing away from the battery pack assembly smoother, which can reduce air resistance during vehicle operation, thereby reducing noise and energy consumption.

[0011] In some embodiments, the bottom guard assembly includes: a bottom guard plate disposed on the bottom of the box assembly on the side opposite to the receiving space, the bottom guard plate having a receiving groove; and a gasket disposed within the receiving groove, with a fixing hole disposed on the gasket. This arrangement can improve the problem of the locking member rubbing against the bottom guard plate, thereby reducing the risk of the bottom guard plate being worn by the locking member, and improving the reliability and service life of the bottom guard plate.

[0012] In some embodiments, the side of the gasket facing away from the box assembly is provided with a third recessed groove that is recessed relative to the surface of the gasket. The third recessed groove is connected to the fixing hole, and the limiting part is provided in the third recessed groove. By providing a third recessed groove with a connecting fixing hole on the side of the gasket facing away from the battery pack assembly, the limiting part is housed within the third recessed groove. Firstly, the third recessed groove not only reduces the weight of the gasket, thus reducing the overall weight of the battery pack, but also allows the limiting part to be hidden within the gasket, improving the compactness of the structure between the limiting part and the gasket. This further reduces the thickness of the battery pack from top to bottom, reducing the impact of the battery pack's weight on the vehicle's energy consumption and range when the battery pack is used as a battery device. It also increases the distance between the underbody protection plate and the ground, reducing the risk of scraping or colliding with the road surface or other obstacles. Secondly, the third recessed groove guides the connector through and into the fixing hole, reducing the difficulty of insertion. It also absorbs and disperses stress in the limiting part, mitigating issues such as gasket deformation or cracking. Thirdly, it makes the surface of the underbody protection plate assembly facing away from the battery pack assembly smoother, reducing air resistance during vehicle operation, thus reducing noise and energy consumption.

[0013] In some embodiments, the receiving groove includes a first sub-receiving groove and a second sub-receiving groove that are connected together, with the first sub-receiving groove located on the side of the second sub-receiving groove closer to the housing assembly; a gasket is disposed in the first sub-receiving groove, and a limiting portion is disposed in the second sub-receiving groove. By forming the first and second sub-receiving grooves that are connected together on the bottom cover plate to accommodate the gasket and the limiting portion respectively, the limiting portion can be hidden inside the bottom cover plate. This reduces the overall weight of the battery housing and the thickness of the battery housing along the top to bottom direction, while simplifying the manufacturing process of the gasket and improving the production efficiency of the battery housing.

[0014] In some embodiments, the bottom panel assembly includes: a bottom panel disposed on the bottom of the housing assembly facing away from the receiving space; a gasket disposed on the bottom panel facing away from the housing assembly; and a fixing hole including a first hole segment and a second hole segment connected in communication, the first hole segment being disposed on the bottom panel and the second hole segment being disposed on the gasket. This arrangement, on the one hand, allows the gasket to isolate the limiting part from the bottom panel, thereby reducing the risk of wear and tear on the bottom panel; on the other hand, the gasket and the bottom panel can jointly bear the stress of the locking element, improving the situation where the fixing hole is located on only one of the gasket and the bottom panel, causing either the gasket or the bottom panel to deform or crack due to bearing the stress of the locking element alone. This helps to enhance the connection strength and stability between the bottom panel assembly and the housing assembly.

[0015] In some embodiments, a gasket is disposed on the surface of the bottom guard plate facing away from the housing assembly. This arrangement not only simplifies the manufacturing process of the bottom guard plate and the gasket, but also reduces the risk of wear and tear on the bottom guard plate, thereby enhancing the connection strength and stability between the bottom guard plate assembly and the housing assembly.

[0016] In some embodiments, the side of the underbody panel facing away from the battery pack assembly has a fourth recessed groove that is recessed relative to the surface of the underbody panel. The fourth recessed groove connects to the first hole section, and a gasket is disposed within the fourth recessed groove. On the one hand, the fourth recessed groove not only reduces the weight of the underbody panel, thereby reducing the overall weight of the battery pack, but also allows the gasket to be hidden within the underbody panel, thereby improving the compactness of the structure between the gasket and the underbody panel. This reduces the thickness of the battery pack along the top to bottom direction, so that when the battery pack is used as a battery device in a vehicle, it not only reduces the impact of the battery device's weight on the vehicle's energy consumption and range, but also increases the distance between the underbody panel assembly and the ground, thereby reducing the risk of the vehicle scraping or colliding with the road surface or other obstacles. On the other hand, it makes the surface of the underbody panel assembly facing away from the battery pack assembly smoother, which reduces air resistance during vehicle operation, thereby reducing noise and also helping to reduce energy consumption.

[0017] In some embodiments, the side of the gasket facing away from the box assembly is provided with a fifth recessed groove that is recessed relative to the surface of the gasket. The fifth recessed groove communicates with the second hole segment, and the limiting portion is provided in the fifth recessed groove. On the one hand, the fifth recess not only reduces the weight of the gasket, thereby further reducing the overall weight of the battery box, but also allows the limiting part to be hidden inside the gasket, thus improving the compactness of the structure between the limiting part and the gasket. This further reduces the thickness of the battery box from top to bottom, so that when the battery box is used as a battery device in a vehicle, it can not only further reduce the impact of the battery device's weight on the vehicle's energy consumption and range, but also further increase the distance between the underbody protection assembly and the ground, thereby further reducing the risk of the vehicle scraping or colliding with the road or other obstacles. On the other hand, the fifth recess not only guides the plug-in part through and inserts it into the fixing hole, reducing the difficulty of inserting the plug-in part, but also absorbs and disperses the stress of the limiting part, which can improve problems such as deformation or cracking of the gasket. Thirdly, it can further improve the flatness of the surface of the underbody protection assembly facing away from the battery box assembly, thereby further reducing the air resistance during vehicle operation, which can not only reduce noise, but also help reduce energy consumption.

[0018] In some embodiments, the fourth sink includes a first sub-sink and a second sub-sink connected in series. The first hole segment, the first sub-sink, and the second sub-sink are sequentially connected. A gasket is disposed in the first sub-sink, and a limiting portion is disposed in the second sub-sink. By forming the first and second sub-sinks connected in series on the bottom guard plate to accommodate the gasket and the limiting portion respectively, the limiting portion can be hidden inside the bottom guard plate. On the one hand, this simplifies the manufacturing process of the gasket; on the other hand, it further reduces the thickness of the battery box from top to bottom, thereby increasing the distance between the bottom guard plate and the ground when the battery box is used for a vehicle's battery device, thus further reducing the risk of the vehicle scraping or colliding with the road surface or other obstacles.

[0019] In some embodiments, the limiting portion includes a limiting boss, the outer edge of which, facing the orthographic projection of the insertion portion, surrounds the insertion portion. This configuration allows the limiting boss to not only restrict the axial displacement of the bottom guard plate assembly along the fixing hole, but also to uniformly limit its movement circumferentially along the fixing hole. This ensures that the force exerted by the limiting boss on the bottom guard plate assembly is distributed circumferentially along the fixing hole, thereby reducing the risk of deformation or cracking of the bottom guard plate assembly and the limiting boss due to stress concentration. This effectively enhances the connection strength and stability between the bottom guard plate assembly and the housing assembly.

[0020] In some embodiments, the limiting portion includes: a connecting section connected to the end face of the insertion portion along the axial direction of the insertion portion; and a limiting body connected to the side of the connecting section and spaced apart circumferentially along the connecting section. This configuration, by connecting the limiting bodies to the side of the connecting section and spaced apart circumferentially along the connecting section, not only restricts the axial displacement of the bottom guard plate assembly along the fixing hole, but also distributes the force exerted by the limiting portion on the bottom guard plate assembly circumferentially along the fixing hole. This reduces deformation or cracking of the bottom guard plate assembly and the limiting portion due to stress concentration, effectively enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0021] In some embodiments, the bottom guard plate assembly includes a plurality of extension holes communicating with the fixing hole, the plurality of extension holes being spaced apart circumferentially around the fixing hole; the locking member also includes a plurality of extensions, the plurality of extensions being connected to the outer peripheral side of the insertion part and the side of the limiting body along the circumferential direction of the connecting section, and the plurality of extensions being spaced apart circumferentially around the insertion part, each of the plurality of extensions being disposed within a corresponding extension hole. This configuration allows the plurality of extensions to limit the circumferential displacement of the insertion part along the fixing hole, and the limiting body to limit the axial displacement of the insertion part along the fixing hole, thereby simultaneously limiting the axial and circumferential displacement of the bottom guard plate assembly along the fixing hole, further enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0022] In some embodiments, the locking assembly further includes a positioning element disposed on the locking member and / or the fixing plate. By providing a positioning element, the positioning speed of the bottom guard plate assembly can be improved, thereby facilitating the improvement of the installation efficiency of the bottom guard plate assembly.

[0023] In some embodiments, the housing assembly includes: a housing body forming an accommodating space; a water-cooling plate disposed within the accommodating space; wherein a bottom protective plate assembly is disposed on the bottom of the housing body on the side opposite to the accommodating space. This arrangement enhances the structural strength and rigidity of the bottom of the housing body, enabling it to withstand external interference such as collisions, scratches, and impacts, thereby reducing the risk of deformation or cracking of the housing body under external interference and improving the reliability of the battery device.

[0024] In some embodiments, the housing assembly includes: a housing body having a receiving space; and a water-cooling plate disposed on the bottom of the housing body facing away from the receiving space; wherein a bottom protective plate assembly is disposed on the side of the water-cooling plate facing away from the housing body. This arrangement enhances the structural strength and rigidity of the water-cooling plate, reduces the risk of deformation or cracking of the water-cooling plate under external interference such as collisions, scratches, and impacts, and improves the reliability of the battery device.

[0025] Secondly, this application provides a battery case, comprising: a case assembly having a receiving space for accommodating individual battery cells; a bottom protective plate assembly disposed on the bottom of the case assembly facing away from the receiving space, the bottom protective plate assembly having a fixing hole; and a locking component at least partially disposed between the case assembly and the bottom protective plate assembly for detachably connecting the bottom protective plate assembly and the case assembly; wherein at least a portion of the locking component is inserted into the fixing hole, the end of the locking component facing away from the case assembly extends beyond the end of the fixing hole facing away from the case assembly, and the radial dimension along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole. The bottom guard plate assembly and the box assembly are detachably connected by a locking component, which enables the box assembly and the bottom guard plate assembly to be disassembled, thereby reducing the difficulty of disassembling the bottom guard plate assembly. Furthermore, the end of the locking component opposite to the box assembly extends to the end of the fixing hole opposite to the box assembly, and the radial dimension along the fixing hole is larger than the radial dimension of the fixing hole. This can lock the bottom guard plate assembly to the side of the box assembly that is away from the locking component and close to the box assembly, and can limit the range of axial movement of the bottom guard plate assembly along the fixing hole, thereby enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0026] In some embodiments, the locking assembly includes a locking member, which includes: a plug portion, at least partially disposed within a fixing hole, and one end of the plug portion being directly or indirectly detachably connected to the housing assembly; and a limiting portion, connected to the other end of the plug portion and located outside the fixing hole at the end opposite to the housing assembly, wherein the maximum radial dimension of the limiting portion along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole. By directly or indirectly detachably connecting one end of the plug-in portion to the box assembly, during the disassembly of the bottom guard plate assembly, it is only necessary to directly or indirectly separate one end of the plug-in portion from the box assembly to separate the bottom guard plate assembly, thereby achieving the disassembly of the bottom guard plate assembly. This reduces the difficulty of disassembly and improves the disassembly efficiency of the bottom guard plate assembly. Furthermore, by connecting the limiting portion to the other end of the plug-in portion and positioning it outside the end of the fixing hole away from the box assembly, and making the maximum radial dimension of the limiting portion along the radial direction of the fixing hole greater than the radial dimension of the fixing hole, the bottom guard plate assembly can be locked to the side of the limiting portion near the box assembly, and the range of axial movement of the bottom guard plate assembly along the fixing hole can be limited, thereby enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0027] In some embodiments, the locking assembly includes a fixing plate and a locking member. The fixing plate is connected to the box assembly, and the side of the fixing plate facing away from the box assembly is connected to the insertion part. The fixing plate is detachably connected to the box assembly, and / or the insertion part is detachably connected to the fixing plate. The fixing plate disperses the stress of the locking member onto the box assembly, reducing the risk of fatigue deformation or breakage of the locking member and the bottom guard plate assembly, and further enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0028] In some embodiments, the underbody panel assembly has a first recessed groove on the side facing the battery pack assembly, which is recessed relative to the surface of the underbody panel assembly. The first recessed groove communicates with a fixing hole, and a fixing plate is disposed within the first recessed groove. By providing a first recessed groove communicating with a fixing hole on the side of the underbody panel assembly facing the battery pack assembly and disposing of the fixing plate within the first recessed groove, on the one hand, the provision of the first recessed groove can reduce the weight of the underbody panel assembly, thereby reducing the overall weight of the battery pack. This reduces the impact of the battery pack's weight on the vehicle's energy consumption and range when the battery pack is used as a battery device. On the other hand, disposing of the fixing plate within the first recessed groove can reduce the dimensions of the battery pack from top to bottom. This increases the distance between the underbody panel assembly and the ground when the battery pack is used as a battery device in a vehicle, thereby reducing the risk of the vehicle scraping or colliding with the road surface or other obstacles and improving the reliability of the battery device.

[0029] In some embodiments, the bottom cover assembly includes a bottom cover disposed on the bottom of the housing assembly on the side facing away from the receiving space, and mounting holes are provided on the bottom cover. By providing mounting holes on the bottom cover for insertion of the plug-in portion, the bottom cover can be easily connected to the housing assembly, which simplifies the installation structure of the bottom cover and improves the efficiency of installation and disassembly of the bottom cover.

[0030] In some embodiments, the bottom guard assembly includes: a bottom guard plate disposed on the bottom of the box assembly on the side opposite to the receiving space, the bottom guard plate having a receiving groove; and a gasket disposed within the receiving groove, with a fixing hole disposed on the gasket. This arrangement can improve the problem of the locking member rubbing against the bottom guard plate, thereby reducing the risk of the bottom guard plate being worn by the locking member, and improving the reliability and service life of the bottom guard plate.

[0031] In some embodiments, the bottom panel assembly includes: a bottom panel disposed on the bottom of the housing assembly facing away from the receiving space; a gasket disposed on the bottom panel facing away from the housing assembly; and a fixing hole including a first hole segment and a second hole segment connected in communication, the first hole segment being disposed on the bottom panel and the second hole segment being disposed on the gasket. This arrangement, on the one hand, allows the gasket to isolate the limiting part from the bottom panel, thereby reducing the risk of wear and tear on the bottom panel; on the other hand, the gasket and the bottom panel can jointly bear the stress of the locking element, improving the situation where the fixing hole is located on only one of the gasket and the bottom panel, causing either the gasket or the bottom panel to deform or crack due to bearing the stress of the locking element alone. This helps to enhance the connection strength and stability between the bottom panel assembly and the housing assembly.

[0032] In some embodiments, the side of the underbody panel facing away from the battery pack assembly has a fourth recessed groove that is recessed relative to the surface of the underbody panel. The fourth recessed groove connects to the first hole section, and a gasket is disposed within the fourth recessed groove. This configuration has several advantages. First, the fourth recessed groove not only reduces the weight of the underbody panel, thereby reducing the overall weight of the battery pack, but also allows the gasket to be hidden within the underbody panel, improving the compactness of the structure between the gasket and the underbody panel. This reduces the thickness of the battery pack from top to bottom, thus reducing the impact of the battery pack's weight on the vehicle's energy consumption and range when the battery pack is used as a battery device in a vehicle. It also increases the distance between the underbody panel assembly and the ground, reducing the risk of the vehicle scraping or colliding with the road surface or other obstacles. Second, it makes the surface of the underbody panel assembly facing away from the battery pack assembly smoother, reducing air resistance during vehicle operation, thereby reducing noise and further reducing energy consumption.

[0033] In some embodiments, the side of the gasket facing away from the battery pack assembly has a fifth recessed groove that is recessed relative to the surface of the gasket. The fifth recessed groove communicates with the second hole segment, and a limiting portion is disposed within the fifth recessed groove. The provision of the fifth recessed groove not only reduces the weight of the gasket, thereby further reducing the overall weight of the battery pack, but also allows the limiting portion to be hidden within the gasket, thereby improving the compactness of the structure between the limiting portion and the gasket. This further reduces the thickness of the battery pack along the top to bottom direction, so that when the battery pack is used in a vehicle's battery device, it not only further reduces the weight of the battery device but also improves the vehicle's energy consumption and range. In addition to reducing the impact on the surface, it can also further increase the distance between the underbody protection assembly and the ground, thereby further reducing the risk of the vehicle scraping or colliding with the road surface or other obstacles; on the other hand, the fifth groove can not only guide the plug part through and insert it into the fixing hole, reducing the difficulty of inserting the plug part, but also absorb and disperse the stress of the limiting part, which can improve the problem of gasket deformation or cracking; thirdly, it can further improve the flatness of the surface of the underbody protection assembly facing the box assembly, thereby further reducing the air resistance of the vehicle during driving, which can not only reduce noise, but also help reduce energy consumption.

[0034] In some embodiments, the fourth sink includes a first sub-sink and a second sub-sink connected in series. The first hole segment, the first sub-sink, and the second sub-sink are sequentially connected. A gasket is disposed in the first sub-sink, and a limiting portion is disposed in the second sub-sink. By forming the first and second sub-sinks connected in series on the bottom guard plate to accommodate the gasket and the limiting portion respectively, the limiting portion can be hidden inside the bottom guard plate. On the one hand, this simplifies the manufacturing process of the gasket; on the other hand, it further reduces the thickness of the battery box from top to bottom, thereby increasing the distance between the bottom guard plate and the ground when the battery box is used for a vehicle's battery device, thus further reducing the risk of the vehicle scraping or colliding with the road surface or other obstacles.

[0035] In some embodiments, the limiting portion includes a limiting boss, the outer edge of which, facing the orthographic projection of the insertion portion, surrounds the insertion portion. This configuration allows the limiting boss to not only restrict the axial displacement of the bottom guard plate assembly along the fixing hole, but also to uniformly limit its movement circumferentially along the fixing hole. This ensures that the force exerted by the limiting boss on the bottom guard plate assembly is distributed circumferentially along the fixing hole, thereby reducing the risk of deformation or cracking of the bottom guard plate assembly and the limiting boss due to stress concentration. This effectively enhances the connection strength and stability between the bottom guard plate assembly and the housing assembly.

[0036] In some embodiments, the limiting portion includes: a connecting section connected to the end face of the insertion portion along the axial direction of the insertion portion; and a limiting body connected to the side of the connecting section and spaced apart circumferentially along the connecting section. This configuration, by connecting the limiting bodies to the side of the connecting section and spaced apart circumferentially along the connecting section, not only restricts the axial displacement of the bottom guard plate assembly along the fixing hole, but also distributes the force exerted by the limiting portion on the bottom guard plate assembly circumferentially along the fixing hole. This reduces deformation or cracking of the bottom guard plate assembly and the limiting portion due to stress concentration, effectively enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0037] In some embodiments, the bottom guard plate assembly includes a plurality of extension holes communicating with the fixing hole, the plurality of extension holes being spaced apart circumferentially around the fixing hole; the locking member also includes a plurality of extensions, the plurality of extensions being connected to the outer peripheral side of the insertion part and the side of the limiting body along the circumferential direction of the connecting section, and the plurality of extensions being spaced apart circumferentially around the insertion part, each of the plurality of extensions being disposed within a corresponding extension hole. This configuration allows the plurality of extensions to limit the circumferential displacement of the insertion part along the fixing hole, and the limiting body to limit the axial displacement of the insertion part along the fixing hole, thereby simultaneously limiting the axial and circumferential displacement of the bottom guard plate assembly along the fixing hole, further enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0038] Thirdly, this application provides an electrical device including the aforementioned battery device. Attached Figure Description

[0039] 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:

[0040] Figure 1 This is a schematic diagram of the structure of an embodiment of the electrical equipment provided in this application;

[0041] Figure 2 This is a structural schematic diagram of the first embodiment of the battery housing provided in this application;

[0042] Figure 3 This is a structural schematic diagram of the second embodiment of the battery housing provided in this application;

[0043] Figure 4 This is a structural schematic diagram of the third embodiment of the battery housing provided in this application;

[0044] Figure 5 This is a structural schematic diagram of the fourth embodiment of the battery housing provided in this application;

[0045] Figure 6 This is a structural schematic diagram of the fifth embodiment of the battery housing provided in this application;

[0046] Figure 7 This is a structural schematic diagram of the sixth embodiment of the battery housing provided in this application;

[0047] Figure 8 This is a structural schematic diagram of the seventh embodiment of the battery housing provided in this application;

[0048] Figure 9 This is a structural schematic diagram of the eighth embodiment of the battery housing provided in this application;

[0049] Figure 10 This is a schematic diagram of a structure of an embodiment of the battery box locking assembly provided in this application;

[0050] Figure 11 This is a schematic diagram of another embodiment of the locking assembly for the battery housing provided in this application.

[0051] The reference numerals in the detailed embodiments are as follows:

[0052] Vehicle 1000a, controller 200a, motor 300a, battery device 100a, battery box 101, box assembly 10, accommodating space 10a, box body 11, water-cooled plate 12, bottom guard plate assembly 20, fixing hole 21, first hole section 211, second hole section 212, first recess 22, bottom guard plate 24, second recess 241, first abutting surface 2411, receiving groove 242, first sub-receiving groove 2421, second sub-receiving groove 2422, fourth recess 243, and so on. Sub-sink 2431, sub-sink 2432, gasket 25, third sink 251, second abutment surface 2511, fifth sink 252, third abutment surface 2521, locking assembly 30, locking member 31, positioning groove 31a, insertion part 311, limiting part 312, limiting boss 3121, connecting section 3122a, limiting body 3122b, extension part 314, fixing plate 32, positioning member 33, first mounting bracket 41, second mounting bracket 42, fixing component 43. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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).

[0057] 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.

[0058] 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.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the 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 heat exchange 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.

[0060] Battery units are typically located at the bottom of electrical devices. For example, the battery units in new energy vehicles are usually located at the bottom of the vehicle to lower the vehicle's center of gravity and balance the front and rear weight distribution. However, during vehicle operation, due to the uncertainty of road conditions, the bottom of the battery pack is susceptible to impact or compression. To enhance the protection of the battery unit, underbody protection plates have been developed. These plates provide physical protection for the battery unit, especially during vehicle operation, reducing or eliminating damage caused by impacts or compression to the bottom of the battery unit.

[0061] The battery housing of a battery device typically includes a housing assembly and a bottom protective plate. The bottom protective plate is usually located on the bottom outside of the housing assembly to improve the impact and compression resistance of the bottom of the housing assembly, thereby reducing the risk of battery device damage due to impact or compression of the bottom during operation.

[0062] In related technologies, the bottom guard plate is usually fixedly connected to the bottom of the box assembly on the side facing away from the accommodating space, and a rigid connection interface is formed between the bottom guard plate and the box assembly, which makes it difficult to disassemble the bottom guard plate and affects the disassembly efficiency.

[0063] Based on the above considerations, this application provides a battery device, a battery housing, and an electrical device. The battery device includes a battery cell and a battery housing. The battery housing includes a housing assembly, a bottom protective plate assembly, and a locking assembly. The housing assembly forms a receiving space for accommodating the battery cell. The bottom protective plate assembly is located at the bottom of the housing assembly on the side opposite to the receiving space, and the bottom protective plate assembly has a fixing hole. The locking assembly is at least partially located between the housing assembly and the bottom protective plate assembly, for detachably connecting the bottom protective plate assembly and the housing assembly. At least a portion of the locking assembly is inserted into the fixing hole, and the end of the locking assembly opposite to the housing assembly extends beyond the end of the fixing hole opposite to the housing assembly, with a radial dimension along the fixing hole greater than the radial dimension of the fixing hole. The bottom guard plate assembly and the box assembly are detachably connected by a locking component, which enables the box assembly and the bottom guard plate assembly to be disassembled, thereby reducing the difficulty of disassembling the bottom guard plate assembly. Furthermore, the end of the locking component opposite to the box assembly extends to the end of the fixing hole opposite to the box assembly, and the radial dimension along the fixing hole is larger than the radial dimension of the fixing hole. This can lock the bottom guard plate assembly to the side of the box assembly that is away from the locking component and close to the box assembly, and can limit the range of axial movement of the bottom guard plate assembly along the fixing hole, thereby enhancing the connection strength and stability between the bottom guard plate assembly and the box assembly.

[0064] The battery device, battery housing, and electrical equipment disclosed in this application can be used in electrical equipment that uses 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 equipment 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.

[0065] For ease of explanation, the following embodiments will be described using a vehicle 1000a as an example of an electrical device according to an embodiment of this application.

[0066] Please refer to Figure 1 The vehicle 1000a can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100a is installed inside the vehicle 1000a, and the battery device 100a can be located at the bottom of the vehicle 1000a. The battery device 100a can be used to power the vehicle 1000a; for example, the battery device 100a can serve as the operating power source for the vehicle 1000a. The vehicle 1000a may also include a controller 200a and a motor 300a. The controller 200a is used to control the battery device 100a to supply power to the motor 300a, for example, to meet the power needs of the vehicle 1000a during starting, navigation, and driving.

[0067] In some embodiments of this application, the battery device 100a can not only serve as the operating power source for the vehicle 1000a, but also as the driving power source for the vehicle 1000a, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000a.

[0068] In some embodiments, the battery device 100a may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0069] The battery device 100a mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0070] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0071] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0072] In some embodiments, the battery device 100a includes a battery housing 101 having a receiving space 10a for accommodating individual battery cells.

[0073] In some embodiments, the battery housing 101 may be part of the chassis structure of the vehicle 1000a. For example, a portion of the battery housing 101 may be at least a part of the chassis of the vehicle 1000a, or a portion of the battery housing 101 may be at least a part of the crossbeams and longitudinal beams of the vehicle 1000a.

[0074] In some embodiments, at least a portion of the battery housing 101 may be disposed on the chassis structure of the vehicle 1000a.

[0075] In some embodiments, please refer to Figure 2 The battery device 100a includes a battery cell and a battery housing 101. The battery housing 101 includes a housing assembly 10, a bottom protective plate assembly 20, and a locking assembly 30. The housing assembly 10 forms a receiving space 10a for receiving the battery cell. The bottom protective plate assembly 20 is located on the bottom of the housing assembly 10, facing away from the receiving space 10a, and has a fixing hole 21. The locking assembly 30 is at least partially located between the housing assembly 10 and the bottom protective plate assembly 20, for detachably connecting the bottom protective plate assembly 20 and the housing assembly 10. At least a portion of the locking assembly 30 is inserted into the fixing hole 21, and the end of the locking assembly 30 facing away from the housing assembly 10 extends beyond the end of the fixing hole 21 facing away from the housing assembly 10, with a radial dimension greater than the radial dimension of the fixing hole 21.

[0076] The bottom guard plate assembly 20 may be provided with a plurality of fixing holes 21. The plurality of fixing holes 21 may be distributed at intervals along the periphery of the bottom guard plate assembly 20; or, the plurality of fixing holes 21 may be evenly distributed in the central region of the bottom guard plate assembly 20; or, the plurality of fixing holes 21 may be randomly distributed on the bottom guard plate assembly 20.

[0077] Because the radial dimension of the end of the locking assembly 30 away from the box assembly 10 along the radial direction of the fixing hole 21 is greater than the radial dimension of the fixing hole 21, the end of the locking assembly 30 away from the box assembly 10 will not pass through the fixing hole 21 from the side of the bottom guard plate assembly 20 away from the box assembly 10, so as to restrict the bottom guard plate assembly 20 between the end of the locking assembly 30 away from the box assembly 10 and the box assembly 10.

[0078] The end of the locking component 30 facing away from the box assembly 10 can abut against the side of the bottom guard plate assembly 20 facing away from the box assembly 10. This not only restricts the bottom guard plate assembly 20 between the end of the locking component 30 facing away from the box assembly 10 and the box assembly 10, but also restricts the bottom guard plate assembly 20 from moving axially along the fixing hole 21. This allows the bottom guard plate assembly 20 to fit tightly against the box assembly 10, thereby enhancing the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0079] The bottom guard plate assembly 20 and the box assembly 10 are detachably connected by the locking component 30, which enables the box assembly 10 and the bottom guard plate assembly 20 to be detachable, thereby reducing the difficulty of disassembling the bottom guard plate assembly 20. Furthermore, the end of the locking component 30 away from the box assembly 10 extends to the outside of the end of the fixing hole 21 away from the box assembly 10, and the radial dimension along the fixing hole 21 is larger than the radial dimension of the fixing hole 21. This can lock the bottom guard plate assembly 20 to the side of the locking component 30 away from the box assembly and close to the box assembly 10, and can limit the range of axial movement of the bottom guard plate assembly 20 along the fixing hole 21, thereby enhancing the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0080] In some embodiments, please continue to refer to Figure 2 The locking assembly 30 includes a locking member 31, which includes a plug-in portion 311 and a limiting portion 312. The plug-in portion 311 is at least partially disposed within the fixing hole 21, and one end of the plug-in portion 311 is directly or indirectly detachably connected to the housing assembly 10. The limiting portion 312 is connected to the other end of the plug-in portion 311 and is located outside the end of the fixing hole 21 opposite to the housing assembly 10. The maximum radial dimension of the limiting portion 312 along the radial direction of the fixing hole 21 is greater than the radial dimension of the fixing hole 21.

[0081] The plug-in portion 311 can be directly and detachably connected to the box assembly 10; alternatively, the plug-in portion 311 can also be detachably connected to the box assembly 10 via other components. In some embodiments, the bottom guard plate assembly 20 is first disposed at the bottom of the box assembly 10, and then one end of the plug-in portion 311 is inserted into the fixing hole 21 from the side of the bottom guard plate assembly 20 facing away from the box assembly 10, and is detachably connected to the box assembly 10 directly or indirectly.

[0082] One end of the plug-in portion 311 can be detachably connected to the box assembly 10. In some embodiments, the plug-in portion 311 can also be connected to the box assembly 10 by adhesive. Since the connection between the plug-in portion 311 and the box assembly 10 is close to point contact with a small contact area, the adhesive force that needs to be overcome during the disassembly of the bottom guard plate assembly 20 is smaller, making the separation process of the bottom guard plate assembly 20 easier. This not only improves the disassembly efficiency of the bottom guard plate assembly 20, but also reduces the risk of deformation or breakage of the bottom guard plate assembly 20 during disassembly, thus helping to achieve non-destructive disassembly of the bottom guard plate assembly 20. In some embodiments, the box assembly 10 is provided with an insertion hole (not shown) that mates with the fixing hole 21. Both the insertion hole and the fixing hole 21 are provided with internal threads, and the insertion part 311 is provided with external threads. The insertion part 311 is detachably connected to the bottom guard plate assembly 20 and the box assembly 10 through the threads. During the disassembly of the bottom guard plate assembly 20, only the locking component 30 needs to be removed, which is efficient and reduces the risk of deformation or breakage of the bottom guard plate assembly 20 during disassembly, thus facilitating non-destructive disassembly of the bottom guard plate assembly 20. In other embodiments, the insertion part 311 and the box assembly 10 can also be connected by a detachable method such as magnetic adsorption or suction cup connection, but are not limited to these methods.

[0083] By directly or indirectly detachably connecting one end of the plug-in portion 311 to the box assembly 10, during the disassembly of the bottom guard plate assembly 20, it is only necessary to directly or indirectly separate one end of the plug-in portion 311 from the box assembly 10 to separate the bottom guard plate assembly 20 from the box assembly 10, thereby achieving the disassembly of the bottom guard plate assembly 20 and reducing the difficulty of disassembly of the bottom guard plate assembly 20. Furthermore, by connecting the limiting portion 312 to the other end of the plug-in portion 311 and located outside the end of the fixing hole 21 opposite to the box assembly 10, and making the maximum radial dimension of the limiting portion 312 along the radial direction of the fixing hole 21 greater than the radial dimension of the fixing hole 21, the bottom guard plate assembly 20 can be locked on the side of the limiting portion 312 near the box assembly 10, and the range of axial movement of the bottom guard plate assembly 20 along the fixing hole 21 can be limited, thereby enhancing the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0084] In some embodiments, one end of the plug-in portion 311 can also be connected to the housing assembly 10 via a non-detachable connection, in which case the limiting portion 312 is connected to the other end of the plug-in portion 311 via a detachable connection. During the disassembly of the bottom protective plate assembly 20, only the limiting portion 312 needs to be disassembled to remove the bottom protective plate assembly 20. The non-detachable connection between one end of the plug-in portion 311 and the housing assembly 10 can be spot welding, arc welding, or laser welding, but is not limited to these methods. The detachable connection between the limiting portion 312 and the other end of the plug-in portion 311 can be threaded connection, adhesive connection, magnetic adsorption connection, or suction cup connection, but is not limited to these methods.

[0085] In some embodiments, please refer to Figure 3 The locking assembly 30 includes a fixing plate 32, which is connected to the box assembly 10, and the side of the fixing plate 32 facing away from the box assembly 10 is connected to the plug-in portion 311. The fixing plate 32 is detachably connected to the box assembly 10 and / or the plug-in portion 311 is detachably connected to the fixing plate 32.

[0086] The locking assembly 30 includes a locking member 31 and a fixing plate 32. First, the fixing plate 32 is connected to the bottom of the box assembly 10 on the side facing away from the receiving space 10a, and the fixing plate 32 is configured to correspond to the fixing hole 21 of the bottom guard plate assembly 20. Then, the bottom guard plate assembly 20 is placed at the bottom of the box assembly 10, and the fixing hole 21 corresponds to the fixing plate 32. Finally, the end of the insertion part 311 away from the limiting part 312 is inserted into the fixing hole 21 and connected to the fixing plate 32.

[0087] In some embodiments, when the fixing plate 32 is detachably connected to the housing assembly 10, the insertion part 311 and the fixing plate 32 can also be detachably connected; alternatively, the insertion part 311 and the fixing plate 32 can also be non-detachably connected. When the insertion part 311 and the fixing plate 32 are detachably connected, the fixing plate 32 and the housing assembly 10 can also be detachably connected; alternatively, the fixing plate 32 and the housing assembly 10 can also be non-detachably connected. The non-detachable connection between the fixing plate 32 and the housing assembly 10, and between the insertion part 311 and the fixing plate 32, can be spot welding, arc welding, or laser welding, etc., but is not limited to these methods. The detachable connection between the fixing plate 32 and the housing assembly 10 can be adhesive bonding, magnetic adsorption bonding, or suction cup bonding, etc., but is not limited to these methods. The detachable connection between the insertion part 311 and the fixing plate 32 can be threaded bonding, adhesive bonding, magnetic adsorption bonding, or suction cup bonding, etc., but is not limited to these methods.

[0088] By connecting the fixing plate 32 to the box assembly 10, and connecting the side of the fixing plate 32 facing away from the box assembly 10 to the plug-in part 311, the fixing plate 32 can serve as an intermediate connecting member between the locking member 31 and the box assembly 10. This can distribute the stress of the locking member 31 to the box assembly 10, thereby reducing the risk of fatigue deformation or breakage of the locking member 31 and the bottom guard plate assembly 20, and further enhancing the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0089] In some embodiments, the fixing plate 32 may be connected between the surface of the box assembly 10 facing the bottom guard plate assembly 20 and the surface of the bottom guard plate assembly 20 facing the box assembly 10, so that a gap is formed between the box assembly 10 and the bottom guard plate assembly 20 that allows a tool to be inserted, so that the detachable connection area between the box assembly 10 and the bottom guard plate assembly 20 can be disconnected by a tool or instrument, thereby shortening the disassembly time of the bottom guard plate assembly 20 and effectively improving the disassembly efficiency of the bottom guard plate assembly 20.

[0090] In some embodiments, the fixing plate 32 may be embedded in the side of the housing assembly 10 facing the bottom guard plate assembly 20; alternatively, the fixing plate 32 may also be embedded in the side of the bottom guard plate assembly 20 facing the housing assembly 10, thereby increasing the distance between the bottom guard plate assembly 20 and the ground when the battery device 100a is applied to the vehicle 1000a, thereby reducing the risk of the vehicle 1000a scraping or colliding with the road surface or other obstacles. The following embodiments are described using the example of the fixing plate 32 being embedded in the side of the bottom guard plate assembly 20 facing the housing assembly 10.

[0091] In some embodiments, please continue to refer to Figure 3 The bottom guard plate assembly 20 has a first recessed groove 22 on the side facing the box assembly 10, which is recessed relative to the surface of the bottom guard plate assembly 20. The first recessed groove 22 is connected to the fixing hole 21, and the fixing plate 32 is disposed in the first recessed groove 22.

[0092] The first recess 22 is formed by the inward indentation of the bottom guard plate assembly 20 toward the surface of the box assembly 10. It can be formed by stamping the bottom guard plate assembly 20 to form the recessed first recess 22, or by etching the bottom guard plate assembly 20 to remove part of the structure to form the recessed first recess 22.

[0093] The first recess 22 can connect to and surround the fixing hole 21. The cross-sectional shape of the first recess 22 along the axial direction perpendicular to the fixing hole 21 can be adapted to the cross-sectional shape of the fixing plate 32 along the axial direction perpendicular to the fixing hole 21; the groove area of ​​the first recess 22 along the axial direction perpendicular to the fixing hole 21 can also be adapted to the cross-sectional area of ​​the fixing plate 32 along the axial direction perpendicular to the fixing hole 21, so that the first recess 22 can accommodate the fixing plate 32. The depth of the first recess 22 along the axial direction of the fixing hole 21 can be set according to the thickness of the fixing plate 32. For example, the depth of the first recess 22 along the axial direction of the fixing hole 21 can be equal to the thickness of the fixing plate 32, so that the surface of the fixing plate 32 facing the box assembly 10 is flush with the surface of the bottom guard plate assembly 20 facing the box assembly 10.

[0094] The orthographic projection of the plug portion 311 toward the fixing plate 32 can be located within the fixing plate 32, which can increase the contact area between the fixing plate 32 and the plug portion 311, thereby improving the connection strength between the plug portion 311 and the fixing plate 32.

[0095] In some embodiments, when the fixing plate 32 is connected to the box assembly 10 in a non-removable manner, after the insertion part 311 is separated from the fixing plate 32, the fixing plate 32 can be dislodged from the first recess 22, so that the bottom guard plate assembly 20 is separated from the box assembly 10, thereby realizing the disassembly of the bottom guard plate assembly 20.

[0096] By providing a first recessed groove 22 with a connecting fixing hole 21 on the side of the bottom guard plate assembly 20 facing the battery box assembly 10, and placing a fixing plate 32 in the first recessed groove 22, on the one hand, the setting of the first recessed groove 22 can reduce the weight of the bottom guard plate assembly 20, thereby reducing the overall weight of the battery box 101. This reduces the impact of the weight of the battery box 100a on the energy consumption and range of the vehicle 100a when the battery box 101 is used in the battery device 100a of the vehicle 1000a. On the other hand, placing the fixing plate 32 in the first recessed groove 22 can reduce the size of the battery box 101 from top to bottom. This increases the distance between the bottom guard plate assembly 20 and the ground when the battery box 101 is used in the battery device 100a of the vehicle 1000a, thereby reducing the risk of the vehicle 1000a scraping or colliding with the road surface or other obstacles, and improving the reliability of the battery device 100a.

[0097] In some embodiments, please continue to refer to Figure 2 and Figure 3 At the same time, refer to Figure 4 The bottom guard plate assembly 20 includes a bottom guard plate 24, which is located on the bottom of the box assembly 10 on the side facing away from the receiving space 10a, and a fixing hole 21 is provided on the bottom guard plate 24.

[0098] The insertion part 311 is inserted into the fixing hole 21 of the bottom cover plate 24. The limiting part 312 can be located on the surface of the bottom cover plate 24 facing away from the box assembly 10, and at least part of the side of the limiting part 312 connected to the insertion part 311 abuts against the bottom cover plate 24. Of course, the limiting part 312 can also be hidden inside the bottom cover plate 24, and the end face of the limiting part 312 away from the box assembly 10 is flush with the surface of the bottom cover plate 24 facing away from the box assembly 10.

[0099] By providing fixing holes 21 on the bottom cover plate 24 for the insertion of the plug part 311, the bottom cover plate 24 can be connected to the box assembly 10, which simplifies the installation structure of the bottom cover plate 24 and improves the installation and disassembly efficiency of the bottom cover plate 24.

[0100] In some embodiments, please continue to refer to Figure 4 The bottom guard plate 24 has a second recessed groove 241 on the side facing away from the box assembly 10, which is recessed relative to the surface of the bottom guard plate 24. The second recessed groove 241 is connected to the fixing hole 21, and the limiting part 312 is provided in the second recessed groove 241.

[0101] The second recess 241 is formed by the inward indentation of the surface of the bottom guard plate 24 facing away from the box assembly 10. It can be formed by stamping the bottom guard plate 24 to form the recessed second recess 241, or by etching the bottom guard plate 24 to remove part of the structure to form the recessed second recess 241.

[0102] The second sink 241 is connected to and surrounds the fixing hole 21, or the second sink 241 is connected to and at least partially surrounds the outer edge of the fixing hole 21. The cross-sectional shape of the second sink 241 along the axial direction perpendicular to the fixing hole 21 can be adapted to the cross-sectional shape of the limiting part 312 along the axial direction perpendicular to the fixing hole 21; the sink area of ​​the second sink 241 along the axial direction perpendicular to the fixing hole 21 can also be adapted to the maximum cross-sectional area of ​​the limiting part 312 along the axial direction perpendicular to the fixing hole 21, so that the second sink 241 can accommodate the limiting part 312. The depth of the second recess 241 along the axial direction of the fixing hole 21 can be set according to the dimension of the limiting part 312 along the axial direction of the fixing hole 21. For example, the depth of the second recess 241 along the axial direction of the fixing hole 21 can be equal to the dimension of the limiting part 312 along the axial direction of the fixing hole 21, so that the end face of the limiting part 312 away from the box assembly 10 is flush with the surface of the bottom guard plate 24 facing away from the box assembly 10, thereby hiding the limiting part 312 in the second recess 241; of course, the depth of the second recess 241 along the axial direction of the fixing hole 21 can also be greater than the dimension of the limiting part 312 along the axial direction of the fixing hole 21.

[0103] In some embodiments, the second recess 241 is provided with a first abutting surface 2411 at one end near the fixing hole 21. The first abutting surface 2411 is used to abut at least a portion of the side of the connection insertion part 311 of the limiting part 312 to lock the bottom guard plate 24 between the limiting part 312 and the box assembly 10. The limiting part 312 can limit the range of axial movement of the bottom guard plate 24 along the fixing hole 21 so that the bottom guard plate 24 can fit tightly with the box assembly 10, thereby enhancing the connection strength and stability between the bottom guard plate 24 and the box assembly 10.

[0104] By providing a second recess 241 connecting the fixing hole 21 on the side of the bottom protective plate 24 facing away from the box assembly 10, the limiting part 312 is disposed in the second recess 241. On the one hand, the second recess 241 can guide the insertion part 311 through and into the fixing hole 21, reducing the difficulty of inserting the insertion part 311; on the other hand, the provision of the second recess 241 can not only reduce the weight of the bottom protective plate 24, thereby reducing the overall weight of the battery box 101, but also hide the limiting part 312 inside the bottom protective plate 24, and reduce the squareness of the battery box 101 from top to bottom. The increased thickness of the battery box 101, when used for the battery device 100a of the vehicle 1000a, not only reduces the impact of the weight of the battery device 100a on the energy consumption and range of the vehicle 1000a, but also increases the distance between the underbody protection plate 24 and the ground, thereby reducing the risk of the vehicle 1000a scraping or colliding with the road or other obstacles; thirdly, it makes the surface of the underbody protection plate 24 facing away from the box assembly 10 flatter, which can reduce the air resistance of the vehicle 1000a during driving, thereby not only reducing noise, but also helping to reduce energy consumption.

[0105] In some embodiments, please refer to Figures 5 to 6 The bottom guard plate assembly 20 includes a bottom guard plate 24 and a gasket 25. The bottom guard plate 24 is located on the bottom of the box assembly 10, facing away from the receiving space 10a, and has a receiving groove 242. The gasket 25 is located in the receiving groove 242, and a fixing hole 21 is located in the gasket 25.

[0106] Wherein, after the gasket 25 is disposed in the receiving groove 242, the surface of the gasket 25 facing away from the box assembly 10 can be flush with the surface of the bottom protective plate 24 facing away from the box assembly 10. The receiving groove 242 can be formed by stamping process, or it can be formed by etching process.

[0107] If the surface of the bottom guard plate 24 facing the box assembly 10 has a first recessed groove 22, then the receiving groove 242 communicates with the first recessed groove 22 and is located at the end of the first recessed groove 22 away from the box assembly 10. If the surface of the bottom guard plate 24 facing the box assembly 10 does not have a first recessed groove 22, then the receiving groove 242 is provided through the bottom guard plate 24 along its thickness direction. A gasket 25 is provided in the receiving groove 242, and the surface of the gasket 25 facing away from the box assembly 10 can be flush with the surface of the bottom guard plate 24 facing away from the box assembly 10; or, the surface of the gasket 25 facing away from the box assembly 10 can be lower than the surface of the bottom guard plate 24 facing away from the box assembly 10, so that the end of the receiving groove 242 away from the box assembly 10 is partially open to accommodate the limiting part 312. A fixing hole 21 is provided in the gasket 25, and the fixing hole 21 is provided through the gasket 25 along the thickness direction of the bottom guard plate 24.

[0108] In some embodiments, when the surface of the gasket 25 facing away from the box assembly 10 is flush with the surface of the bottom cover 24 facing away from the box assembly 10, the limiting portion 312 may protrude from the surface of the bottom cover 24 facing away from the box assembly 10; of course, the limiting portion 312 may also be hidden within the gasket 25. When the surface of the gasket 25 facing away from the box assembly 10 is lower than the surface of the bottom cover 24 facing away from the box assembly 10, the limiting portion 312 is provided within the receiving groove 242.

[0109] By providing a receiving groove 242 for accommodating the gasket 25 on the bottom guard plate 24 and opening a fixing hole 21 on the gasket 25, the problem of the locking member 31 rubbing against the bottom guard plate 24 can be improved, thereby reducing the risk of the bottom guard plate 24 being worn by the locking member 31 and improving the reliability and service life of the bottom guard plate 24.

[0110] In some embodiments, please continue to refer to Figure 5 The gasket 25 has a third recess 251 that is recessed relative to the surface of the gasket 25 on the side facing away from the box assembly 10. The third recess 251 is connected to the fixing hole 21, and the limiting part 312 is provided in the third recess 251.

[0111] The third recess 251 is formed by the inward indentation of the surface of the gasket 25 facing away from the housing assembly 10. The third recess 251 can be formed by a stamping process, or it can be formed by an etching process.

[0112] The third recess 251 is connected to and surrounds the fixing hole 21, or the third recess 251 is connected to and at least partially surrounds the outer edge of the fixing hole 21. The cross-sectional shape of the third recess 251 along the axial direction perpendicular to the fixing hole 21 can be adapted to the cross-sectional shape of the limiting part 312 along the axial direction perpendicular to the fixing hole 21. The groove area of ​​the third recess 251 along the axial direction perpendicular to the fixing hole 21 can also be adapted to the maximum cross-sectional area of ​​the limiting part 312 along the axial direction perpendicular to the fixing hole 21, so that the third recess 251 can accommodate the limiting part 312. The depth of the third recess 251 along the axial direction of the fixing hole 21 can be set according to the dimension of the limiting part 312 along the axial direction of the fixing hole 21. For example, the depth of the third recess 251 along the axial direction of the fixing hole 21 can be equal to the dimension of the limiting part 312 along the axial direction of the fixing hole 21, so that the end face of the limiting part 312 away from the box assembly 10 is flush with the surface of the bottom guard plate 24 facing away from the box assembly 10, thereby hiding the limiting part 312 in the third recess 251; of course, the depth of the third recess 251 along the axial direction of the fixing hole 21 can also be greater than the dimension of the limiting part 312 along the axial direction of the fixing hole 21.

[0113] In some embodiments, the third recess 251 is provided with a second abutment surface 2511 at one end near the fixing hole 21. The second abutment surface 2511 is used to abut at least a portion of the side of the connection insertion part 311 of the limiting part 312 to lock the bottom guard plate assembly 20 between the limiting part 312 and the box assembly 10. The limiting part 312 can limit the range of axial movement of the gasket 25 along the fixing hole 21, thereby limiting the axial movement of the bottom guard plate 24 along the fixing hole 21, so that the bottom guard plate 24 can fit tightly with the box assembly 10, which can enhance the connection strength and stability between the bottom guard plate 24 and the box assembly 10.

[0114] By providing a third recess 251 with a connecting fixing hole 21 on the side of the gasket 25 facing away from the housing assembly 10, the limiting part 312 is disposed within the third recess 251. On the one hand, the provision of the third recess 251 not only reduces the weight of the gasket 25, thereby reducing the overall weight of the battery housing 101, but also allows the limiting part 312 to be hidden within the gasket 25, thereby improving the compactness of the structure between the limiting part 312 and the gasket 25, further reducing the thickness of the battery housing 101 from top to bottom. This ensures that when the battery housing 101 is used in the battery device 100a of the vehicle 1000a, the weight of the battery device 100a on the vehicle 1000a is reduced. In addition to reducing the impact on energy consumption and range, it can also further increase the distance between the underbody protection plate 24 and the ground, thereby reducing the risk of the vehicle 1000a scraping or colliding with the road surface or other obstacles; on the other hand, the third recess 251 can not only guide the plug part 311 through and insert it into the fixing hole 21, reducing the difficulty of inserting the plug part 311, but also absorb and disperse the stress of the limiting part 312, which can improve the problem of deformation or cracking of the gasket 25; thirdly, it makes the surface of the underbody protection plate assembly 20 facing away from the box assembly 10 flatter, which can reduce the air resistance of the vehicle 1000a during driving, thereby not only reducing noise, but also helping to reduce energy consumption.

[0115] In some embodiments, please continue to refer to Figure 6 The receiving groove 242 includes a first sub-receiving groove 2421 and a second sub-receiving groove 2422 that are connected to each other. The first sub-receiving groove 2421 is located on the side of the second sub-receiving groove 2422 closer to the box assembly 10. A gasket 25 is disposed in the first sub-receiving groove 2421, and a limiting part 312 is disposed in the second sub-receiving groove 2422.

[0116] The dimensions of the first sub-accommodating groove 2421 and the second sub-accommodating groove 2422 can be the same; of course, the dimensions of the first sub-accommodating groove 2421 and the second sub-accommodating groove 2422 can also be different.

[0117] By forming a first sub-accommodating groove 2421 and a second sub-accommodating groove 2422 connected on the bottom cover plate 24 to accommodate the gasket 25 and the limiting part 312 respectively, the limiting part 312 can be hidden inside the bottom cover plate 24. This can reduce the overall weight of the battery box 101 and the thickness of the battery box 101 in the direction from top to bottom, while simplifying the manufacturing process of the gasket 25 and improving the production efficiency of the battery box.

[0118] In some embodiments, please refer to Figures 7 to 9The bottom guard assembly 20 includes a bottom guard 24 and a gasket 25. The bottom guard 24 is located on the bottom of the housing assembly 10, facing away from the receiving space 10a. The gasket 25 is located on the bottom guard 24, facing away from the housing assembly 10. The fixing hole 21 includes a first hole section 211 and a second hole section 212 that are connected together. The first hole section 211 is located on the bottom guard 24, and the second hole section 212 is located on the gasket 25.

[0119] The gasket 25 can be disposed on the surface of the bottom cover plate 24 facing away from the box assembly 10; alternatively, the gasket 25 can be hidden inside the bottom cover plate 24; or the gasket 25 can be hidden within the gasket 25. The fixing hole 21 extends from the side of the gasket 25 facing away from the box assembly 10 along the thickness direction of the bottom cover plate 24 to the side of the bottom cover plate 24 facing the box assembly 10. The fixing hole 21 located on the bottom cover plate 24 is a first hole segment 211, and the fixing hole 21 located on the gasket 25 is a second hole segment 212. The fixing hole 21 is composed of the first hole segment 211 and the second hole segment 212, which are connected and coaxially arranged. The insertion part 311 is sequentially inserted into the second hole segment 212 and the first hole segment 211.

[0120] By providing a gasket 25 on the side of the bottom guard plate 24 facing away from the box assembly 10, and by opening a fixing hole 21 on the gasket 25 and the bottom guard plate 24, on the one hand, the gasket 25 can isolate the limiting part 312 from the bottom guard plate 24, thereby reducing the risk of wear and tear on the bottom guard plate 24; on the other hand, the gasket 25 and the bottom guard plate 24 can jointly bear the stress of the locking member 31, which can improve the risk of deformation or cracking caused by the fixing hole 21 being located on only one of the gasket 25 and the bottom guard plate 24 bearing the stress of the locking member 31 alone, thus helping to enhance the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0121] In some embodiments, please continue to refer to Figure 7 The gasket 25 is disposed on the surface of the bottom guard plate 24 facing away from the box assembly 10.

[0122] The limiting part 312 can be located on the side of the gasket 25 facing away from the bottom cover plate 24, and at least part of the side of the limiting part 312 connected to the insertion part 311 abuts against the gasket 25. Of course, the limiting part 312 can also be hidden inside the gasket 25.

[0123] By placing the gasket 25 on the surface of the bottom guard plate 24 facing away from the box assembly 10, the manufacturing process of the bottom guard plate 24 and the gasket 25 can be simplified, and the risk of wear and tear on the bottom guard plate 24 can be reduced, thereby enhancing the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0124] In some embodiments, please continue to refer to Figures 8 to 9The bottom guard plate 24 has a fourth recess 243 that is recessed relative to the surface of the bottom guard plate 24 on the side facing away from the box assembly 10. The fourth recess 243 is connected to the first hole section 211, and the gasket 25 is disposed in the fourth recess 243.

[0125] The fourth recess 243 is formed by an inward indentation of the surface of the bottom protective plate 24 facing away from the box assembly 10. The fourth recess 243 can be formed by a stamping process, or it can be formed by an etching process.

[0126] The fourth settling groove 243 is connected to and surrounds the first hole section 211. When the gasket 25 is placed in the fourth settling groove 243, the second hole section 212 of the gasket 25 is connected to the first hole section 211 of the bottom guard plate 24, and the second hole section 212 is coaxial with the first hole section 211. The cross-sectional shape of the fourth settling groove 243 along the axial direction perpendicular to the first hole section 211 can be adapted to the cross-sectional shape of the gasket 25 along the axial direction perpendicular to the first hole section 211; the groove area of ​​the fourth settling groove 243 along the axial direction perpendicular to the first hole section 211 can also be adapted to the cross-sectional area of ​​the gasket 25 along the axial direction perpendicular to the first hole section 211, so that the fourth settling groove 243 can accommodate the gasket 25. The depth of the fourth recess 243 along the axial direction of the first hole 211 can be set according to the thickness of the gasket 25. For example, the depth of the fourth recess 243 along the axial direction of the first hole 211 can be equal to the thickness of the gasket 25, so that the surface of the gasket 25 facing away from the box assembly 10 is flush with the surface of the bottom guard plate 24 facing away from the box assembly 10, thereby hiding the gasket 25 in the fourth recess 243. Of course, the depth of the fourth recess 243 along the axial direction of the fixing hole 21 can also be greater than the thickness of the gasket 25.

[0127] By providing a fourth recess 243 for accommodating the gasket 25 on the side of the bottom guard plate 24 facing away from the battery pack assembly 10, the fourth recess 243 not only reduces the weight of the bottom guard plate 24, thereby reducing the overall weight of the battery pack 101, but also allows the gasket to be hidden inside the bottom guard plate, thereby increasing the compactness of the structure between the gasket 25 and the bottom guard plate 24. This reduces the thickness of the battery pack 101 from top to bottom, so that when the battery pack 101 is used for the battery device 100a of the vehicle 1000a, it not only reduces the impact of the weight of the battery device 100a on the energy consumption and range of the vehicle 1000a, but also increases the distance between the bottom guard plate 24 and the ground, thereby reducing the risk of the vehicle 1000a scraping or colliding with the road surface or other obstacles. On the other hand, it makes the surface of the bottom guard plate assembly 20 facing away from the battery pack assembly 10 flatter, which reduces the air resistance of the vehicle 1000a during driving, thereby reducing noise and energy consumption.

[0128] In some embodiments, please continue to refer to Figure 8 The gasket 25 has a fifth recess 252 that is recessed relative to the surface of the gasket 25 on the side facing away from the box assembly 10. The fifth recess 252 is connected to the second hole section 212, and the limiting part 312 is provided in the fifth recess 252.

[0129] The surface of the gasket 25 facing away from the housing assembly 10 can be flush with the surface of the bottom protective plate 24 facing away from the housing assembly 10. The fifth recess 252 is formed by indenting the surface of the gasket 25 facing away from the housing assembly 10. The fifth recess 252 can be formed by a stamping process, or it can be formed by an etching process.

[0130] The fifth settling groove 252 is connected to and surrounds the second hole segment 212, or the fifth settling groove 252 is connected to and at least partially surrounds the outer edge of the second hole segment 212. The cross-sectional shape of the fifth settling groove 252 along the axial direction perpendicular to the second hole segment 212 can be adapted to the cross-sectional shape of the limiting part 312 along the axial direction perpendicular to the second hole segment 212; the groove area of ​​the fifth settling groove 252 along the axial direction perpendicular to the second hole segment 212 can also be adapted to the maximum cross-sectional area of ​​the limiting part 312 along the axial direction perpendicular to the second hole segment 212, so that the fifth settling groove 252 can accommodate the limiting part 312. The depth of the fifth sink 252 along the axial direction of the second hole segment 212 can be set according to the dimension of the limiting part 312 along the axial direction of the second hole segment 212. For example, the depth of the fifth sink 252 along the axial direction of the second hole segment 212 can be equal to the dimension of the limiting part 312 along the axial direction of the second hole segment 212, and the end face of the limiting part 312 away from the box assembly 10 is flush with the surface of the bottom guard plate 24 facing away from the box assembly 10, thereby realizing the hiding of the limiting part 312 in the fifth sink 252; of course, the depth of the fifth sink 252 along the axial direction of the second hole segment 212 can also be greater than the dimension of the limiting part 312 along the axial direction of the second hole segment 212.

[0131] In some embodiments, the fifth recess 252 is provided with a third abutment surface 2521 at one end near the second hole section 212. The third abutment surface 2521 is used to abut at least a portion of the side of the connection insertion part 311 of the limiting part 312 to lock the bottom guard plate assembly 20 between the limiting part 312 and the box assembly 10. The limiting part 312 can limit the range of axial movement of the bottom guard plate assembly 20 along the fixing hole 21 so that the bottom guard plate assembly 20 can fit tightly with the box assembly 10, thereby enhancing the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0132] By providing a fifth recess 252 communicating with the second hole segment 212 on the side of the gasket 25 facing away from the housing assembly 10, the limiting part 312 is disposed within the fifth recess 252. On the one hand, the provision of the fifth recess 252 not only reduces the weight of the gasket 25, thereby further reducing the overall weight of the battery housing 101, but also allows the limiting part 312 to be hidden within the gasket 25, thereby improving the compactness of the structure between the limiting part 312 and the gasket 25. This further reduces the thickness of the battery housing 101 from top to bottom, so that when the battery housing 101 is used in the battery device 100a of the vehicle 1000a, the weight of the battery device 100a can be further reduced to reduce the energy consumption of the vehicle 1000a. In addition to reducing the impact on range and other aspects, it can also further increase the distance between the underbody protection assembly 20 and the ground, thereby further reducing the risk of the vehicle 1000a scraping or colliding with the road surface or other obstacles; on the other hand, the fifth recess 252 can not only guide the plug part 311 through and insert it into the fixing hole 21, reducing the difficulty of inserting the plug part 311, but also absorb and disperse the stress of the limiting part 312, which can improve the problem of deformation or cracking of the gasket 25; thirdly, it can further improve the flatness of the surface of the underbody protection assembly 20 facing away from the box assembly 10, thereby further reducing the air resistance of the vehicle 1000a during driving, which can not only reduce noise, but also help reduce energy consumption.

[0133] In some embodiments, please continue to refer to Figure 9 The fourth settling tank 243 includes a first sub-settling tank 2431 and a second sub-settling tank 2432 connected in series. The first hole section 211, the first sub-settling tank 2431 and the second sub-settling tank 2432 are connected in sequence. A gasket 25 is disposed in the first sub-settling tank 2431. A limiting part 312 is disposed in the second sub-settling tank 2432.

[0134] The first sub-sink trough 2431 is located at the end of the second sub-sink trough 2432 near the first hole section 211.

[0135] By forming a first sub-groove 2431 and a second sub-groove 2432 connected on the bottom guard plate 24 to accommodate the gasket 25 and the limiting part 312 respectively, the limiting part 312 can be hidden inside the bottom guard plate 24. On the one hand, this helps to simplify the manufacturing process of the gasket 25; on the other hand, it can further reduce the thickness of the battery box 101 in the direction from top to bottom. This allows the distance between the bottom guard plate 24 and the ground to be further increased when the battery box 101 is used in the battery device 100a of the vehicle 1000a, thereby further reducing the risk of the vehicle 1000a scraping or colliding with the road surface or other obstacles.

[0136] In some embodiments, please refer to Figure 10The limiting part 312 includes a limiting boss 3121, and the outer edge of the limiting boss 3121, which is directed toward the orthographic projection of the insertion part 311, surrounds the insertion part 311.

[0137] The outer edge of the limiting boss 3121 facing the insertion part 311 can be an annular limiting surface surrounding the insertion part 311, which is used to abut against the bottom guard plate assembly 20. The limiting boss 3121 can be cylindrical, cubic, or hemispherical, but is not limited to these shapes.

[0138] By setting the outer edge of the limiting boss 3121 around the insertion part 311 with the orthographic projection of the insertion part 311, the limiting boss 3121 can not only restrict the axial displacement of the bottom guard plate assembly 20 along the fixing hole 21, but also uniformly limit it along the circumference of the fixing hole 21, so that the force of the limiting boss 3121 on the bottom guard plate assembly 20 is distributed along the circumference of the fixing hole 21. This can reduce the risk of deformation or cracking of the bottom guard plate assembly 20 and the limiting boss 3121 due to stress concentration, and effectively enhance the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0139] In some embodiments, please refer to Figure 11 The limiting part 312 includes a connecting section 3122a and a limiting body 3122b. The connecting section 3122a is connected to the end face of the insertion part 311 along the axial direction of the insertion part 311. The limiting body 3122b is connected to the side of the connecting section 3122a and is spaced apart along the circumference of the connecting section 3122a.

[0140] The connecting segment 3122a and the insertion part 311 can be coaxially arranged. The radial dimension of the connecting segment 3122a along the fixing hole 21 can be smaller than the radial dimension of the insertion part 311 along the fixing hole 21; or, the radial dimension of the connecting segment 3122a along the fixing hole 21 can be larger than the radial dimension of the insertion part 311 along the fixing hole 21; or, the radial dimension of the connecting segment 3122a along the fixing hole 21 can also be equal to the radial dimension of the insertion part 311 along the fixing hole 21.

[0141] The limiting body 3122b is connected to the side of the connecting section 3122a and is spaced apart along the circumference of the connecting section 3122a, so that the maximum radial dimension of the limiting part 312 along the radial direction of the fixing hole 21 is greater than the radial dimension of the fixing hole 21. The limiting body 3122b is used to abut against the bottom guard plate assembly 20.

[0142] By connecting the limiting body 3122b to the side of the connecting section 3122a and spacing it along the circumference of the connecting section 3122a, the limiting body 3122b can not only restrict the axial displacement of the bottom guard plate assembly 20 along the fixing hole 21, but also make the force of the limiting part 312 on the bottom guard plate assembly 20 distributed along the circumference of the fixing hole 21. This can reduce the deformation or cracking of the bottom guard plate assembly 20 and the limiting part 312 caused by stress concentration, and effectively enhance the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0143] In some embodiments, please continue to refer to Figure 11 The bottom guard plate assembly 20 includes a plurality of extension holes (not shown) communicating with the fixing hole 21. The plurality of extension holes are spaced apart circumferentially around the fixing hole 21. The locking member 31 also includes a plurality of extensions 314. The plurality of extensions 314 are connected to the outer peripheral side of the insertion part 311 and the side of the limiting body 3122b along the circumferential direction of the connecting section 3122a, and are spaced apart circumferentially around the insertion part 311. The plurality of extensions 314 are respectively disposed in the corresponding extension holes.

[0144] Among them, one end of the multiple extensions 314 away from the box assembly 10 and the side of the limiting body 3122b along the circumferential direction of the connecting section 3122a are connected. An angle is formed between the extensions 314 and the limiting body 3122b. The arrangement of the extensions 314 and the limiting body 3122b can simultaneously limit the axial and circumferential displacement of the bottom guard plate assembly 20 along the fixing hole 21.

[0145] By providing a connecting fixing hole 21 on the bottom guard plate assembly 20, and providing multiple extension holes spaced around the outer periphery of the fixing hole 21 along the circumferential direction, and connecting multiple extensions 314 to the outer periphery of the insertion part 311 and the side of the limiting body 3122b along the circumferential direction of the connecting section 3122a, and placing the multiple extensions 314 in the corresponding extension holes, the multiple extensions 314 can restrict the displacement of the insertion part 311 along the circumferential direction of the fixing hole 21, and the limiting body 3122b can restrict the axial displacement of the insertion part 311 along the fixing hole 21, thereby simultaneously restricting the axial and circumferential displacement of the bottom guard plate assembly 20 along the fixing hole 21, and further enhancing the connection strength and stability between the bottom guard plate assembly 20 and the box assembly 10.

[0146] In some embodiments, the locking assembly 30 further includes a positioning member 33, which is disposed on the locking member 31 and / or the fixing plate 32. By providing the positioning member 33, the positioning speed of the bottom guard plate assembly 20 can be improved, thereby improving the installation efficiency of the bottom guard plate assembly 20.

[0147] In some embodiments, the connecting segment 3122a or the connecting segment 3122a and the insertion part 311 are provided with a positioning groove 31a, and the positioning member 33 is disposed in the positioning groove 31a.

[0148] In some embodiments, the plug portion 311 may be a solid structure, the connecting section 3122a may be a hollow structure, the positioning groove 31a is formed on the end face of the plug portion 311, and the positioning member 33 is fixed to the end of the plug portion 311 away from the box assembly 10.

[0149] In some embodiments, the plug-in portion 311 and the connecting section 3122a can both be hollow structures, the positioning groove 31a is formed in the plug-in portion 311 and the connecting section 3122a, the positioning member 33 can be fixed to the fixing plate 32, or the positioning member 33 can also be fixed to the bottom of the box assembly 10 on the side facing away from the receiving space 10a.

[0150] In some embodiments, the enclosure assembly 10 includes an enclosure body 11 and a water-cooled plate 12. The enclosure body 11 forms a receiving space 10a, and the water-cooled plate 12 is disposed within the receiving space 10a. A bottom protective plate assembly 20 is disposed on the bottom of the enclosure body 11 on the side facing away from the receiving space 10a.

[0151] By placing the bottom protective plate assembly 20 on the bottom of the housing body 11 facing away from the accommodating space 10a, the structural strength and rigidity of the bottom of the housing body 11 can be enhanced, enabling the housing body 11 to resist external interference such as collisions, scratches and impacts, thereby reducing the risk of deformation or cracking of the housing body 11 under external interference and improving the reliability of the battery device 100a.

[0152] In some embodiments, the enclosure assembly 10 includes an enclosure body 11 and a water-cooled plate 12. The enclosure body 11 forms a receiving space 10a, and the water-cooled plate 12 is disposed on the bottom of the enclosure body 11 on the side facing away from the receiving space 10a. A bottom protective plate assembly 20 is disposed on the side of the water-cooled plate 12 facing away from the enclosure body 11.

[0153] By placing the bottom protective plate assembly 20 on the side of the water-cooled plate 12 facing away from the main body 11, the structural strength and rigidity of the water-cooled plate 12 can be enhanced, the risk of deformation or cracking of the water-cooled plate 12 under external interference such as collision, scratch and impact can be reduced, and the reliability of the battery device 100a can be improved.

[0154] In some embodiments, the battery housing 101 further includes a first mounting bracket 41, a second mounting bracket 42, and a fixing component 43. The first mounting bracket 41 may be disposed on the side of the side plate of the housing assembly 10 facing away from the receiving space 10a, and located at the end of the housing assembly 10 near the bottom protective plate assembly 20. The second mounting bracket 42 may be disposed at the end of the bottom protective plate assembly 20 along the thickness direction, and corresponding to the first mounting bracket 41. The first mounting bracket 41 and the second mounting bracket 42 are used to cooperate with the fixing component 43 to fix the housing assembly 10 and the bottom protective plate assembly 20 together, which can further enhance the connection strength and stability of the housing assembly 10 and the bottom protective plate assembly 20. The fixing component 43 may be a bolt, screw, rivet, or pin, etc., but is not limited to these.

[0155] During the installation of the bottom guard plate 24, the bottom guard plate assembly 20 can be fixed to the box assembly 10 first by the locking component 30, and then the connection strength between the box assembly 10 and the bottom guard plate assembly 20 can be further strengthened by the first mounting bracket 41, the second mounting bracket 42 and the fixing component 43; or, the bottom guard plate assembly 20 can be fixed to the box assembly 10 first by the first mounting bracket 41, the second mounting bracket 42 and the fixing component 43, and then the connection strength between the box assembly 10 and the bottom guard plate assembly 20 can be further strengthened by the locking component 30.

[0156] In some embodiments, such as Figure 2 As shown, the locking assembly 30 includes a locking member 31, which includes a plug-in portion 311 and a limiting portion 312. The plug-in portion 311 is at least partially disposed within the fixing hole 21, and the end of the plug-in portion 311 away from the limiting portion 312 is detachably connected to the box assembly 10; or, as Figure 3 As shown, the locking assembly 30 includes a locking member 31 and a fixing plate 32. The locking member 31 includes a plug-in portion 311 and a limiting portion 312. The fixing plate 32 is connected to the box assembly 10. The plug-in portion 311 is at least partially disposed in the fixing hole 21, and the end of the plug-in portion 311 away from the limiting portion 312 is connected to the fixing plate 32. The fixing plate 32 is detachably connected to the box assembly 10 and / or the plug-in portion 311 is detachably connected to the fixing plate 32.

[0157] In some embodiments, such as Figure 4 As shown, the bottom guard plate assembly 20 includes a bottom guard plate 24, which is located on the bottom of the box assembly 10 on the side facing away from the receiving space 10a. A fixing hole 21 is provided on the bottom guard plate 24. The bottom guard plate 24 on the side facing away from the box assembly 10 has a second recessed groove 241 that is recessed relative to the surface of the bottom guard plate 24. The second recessed groove 241 communicates with the fixing hole 21, and a limiting part 312 is provided in the second recessed groove 241.

[0158] In some embodiments, such as Figure 5As shown, the bottom guard plate assembly 20 includes a bottom guard plate 24 and a gasket 25. The bottom guard plate 24 is located on the bottom of the box assembly 10 on the side facing away from the receiving space 10a. The bottom guard plate 24 is provided with a receiving groove 242. The gasket 25 is located in the receiving groove 242. The fixing hole 21 is located in the gasket 25. The side of the gasket 25 facing away from the box assembly 10 is provided with a third recessed groove 251 that is recessed relative to the surface of the gasket 25. The third recessed groove 251 communicates with the fixing hole 21. The limiting part 312 is located in the third recessed groove 251.

[0159] In some embodiments, such as Figure 6 As shown, the bottom guard plate assembly 20 includes a bottom guard plate 24 and a gasket 25. The bottom guard plate 24 is located on the bottom of the box assembly 10 on the side facing away from the receiving space 10a. The bottom guard plate 24 has a receiving groove 242. The gasket 25 is located in the receiving groove 242. The fixing hole 21 is located in the gasket 25. The receiving groove 242 includes a first sub-receiving groove 2421 and a second sub-receiving groove 2422 that are connected to each other. The first sub-receiving groove 2421 is located on the side of the second sub-receiving groove 2422 that is close to the box assembly 10. The gasket 25 is located in the first sub-receiving groove 2421. The limiting part 312 is located in the second sub-receiving groove 2422.

[0160] In some embodiments, such as Figure 8 As shown, the bottom guard plate assembly 20 includes a bottom guard plate 24 and a gasket 25. The bottom guard plate 24 is located on the bottom of the box assembly 10 on the side facing away from the receiving space 10a. The gasket 25 is located on the side of the bottom guard plate 24 facing away from the box assembly 10. The fixing hole 21 includes a first hole segment 211 and a second hole segment 212 that are connected together. The first hole segment 211 is located on the bottom guard plate 24, and the second hole segment 212 is located on the gasket 25. The side of the bottom guard plate 24 facing away from the box assembly 10 has a fourth recessed groove 243 that is recessed relative to the surface of the bottom guard plate 24. The fourth recessed groove 243 is connected to the first hole segment 211, and the gasket 25 is located in the fourth recessed groove 243.

[0161] In some embodiments, such as Figure 9 As shown, the bottom guard plate assembly 20 includes a bottom guard plate 24 and a gasket 25. The bottom guard plate 24 is located on the bottom of the box assembly 10 on the side facing away from the receiving space 10a. The gasket 25 is located on the side of the bottom guard plate 24 facing away from the box assembly 10. The fixing hole 21 includes a first hole section 211 and a second hole section 212 that are connected. The first hole section 211 is located on the bottom guard plate 24, and the second hole section 212 is located on the gasket 25. The side of the gasket 25 facing away from the box assembly 10 has a fifth recessed groove 252 that is recessed relative to the surface of the gasket 25. The fifth recessed groove 252 is connected to the second hole section 212. The limiting part 312 is located in the fifth recessed groove 252.

[0162] This application further proposes a battery housing 101, which includes a housing assembly 10 and a bottom protective plate assembly 20, and the battery housing 101 can be used in a battery device 100a.

[0163] According to some embodiments of this application, the battery device 100a described above can be used in electrical equipment. This configuration allows for the detachable connection of the bottom protective plate assembly 20 and the housing assembly 10 via the locking component 30, thereby reducing the difficulty of disassembling the bottom protective plate assembly 20. Furthermore, the locking component 30 extends from the end opposite to the housing assembly 10 to the end of the fixing hole 21 opposite to the housing assembly 10, and its radial dimension along the fixing hole 21 is greater than the radial dimension of the fixing hole 21. This locks the bottom protective plate assembly 20 to the side of the locking component 30 away from the housing assembly and close to the housing assembly 10, and restricts the range of axial movement of the bottom protective plate assembly 20 along the fixing hole 21, thereby enhancing the connection strength and stability between the bottom protective plate assembly 20 and the housing assembly 10.

[0164] 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, The battery device includes individual battery cells and a battery housing, the battery housing comprising: The housing assembly has a receiving space for accommodating the individual battery cells; A bottom protective plate assembly is disposed on the bottom of the box assembly on the side opposite to the receiving space, and the bottom protective plate assembly is provided with fixing holes; A locking assembly, at least partially disposed between the box assembly and the bottom guard plate assembly, is used to detachably connect the bottom guard plate assembly and the box assembly. At least a portion of the locking component is inserted into the fixing hole, and one end of the locking component opposite to the box assembly extends to the outside of the fixing hole opposite to the box assembly, and the radial dimension along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole.

2. The battery device according to claim 1, characterized in that, The locking assembly includes a locking member, which includes: The plug-in portion is at least partially disposed within the fixing hole, and one end of the plug-in portion is directly or indirectly detachably connected to the box assembly. A limiting part is connected to the other end of the plug-in part and is located outside the end of the fixing hole away from the box assembly. The maximum radial dimension of the limiting part along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole.

3. The battery device according to claim 2, characterized in that, The locking assembly includes a fixing plate, which is connected to the box assembly, and the side of the fixing plate facing away from the box assembly is connected to the plug-in portion; The fixing plate is detachably connected to the box assembly and / or the plug-in part is detachably connected to the fixing plate.

4. The battery device according to claim 3, characterized in that, The bottom guard plate assembly has a first recessed groove on the side facing the box assembly, which is recessed relative to the surface of the bottom guard plate assembly. The first recessed groove communicates with the fixing hole, and the fixing plate is disposed in the first recessed groove.

5. The battery device according to any one of claims 2 to 4, characterized in that, The bottom protective plate assembly includes a bottom protective plate, which is disposed on the bottom of the box assembly on the side opposite to the receiving space, and the fixing hole is disposed on the bottom protective plate.

6. The battery device according to claim 5, characterized in that, The bottom guard plate has a second recessed groove on the side facing away from the box assembly. The second recessed groove is connected to the fixing hole, and the limiting part is located in the second recessed groove.

7. The battery device according to any one of claims 2 to 4, characterized in that, The bottom guard plate assembly includes: A bottom protective plate is provided on the bottom of the box assembly on the side opposite to the receiving space, and the bottom protective plate is provided with a receiving groove; A gasket is disposed within the receiving groove, and a fixing hole is disposed within the gasket.

8. The battery device according to claim 7, characterized in that, The gasket has a third recessed groove on the side facing away from the box assembly, which is recessed relative to the surface of the gasket. The third recessed groove is connected to the fixing hole, and the limiting part is disposed in the third recessed groove.

9. The battery device according to claim 7, characterized in that, The receiving slot includes a first sub-receiving slot and a second sub-receiving slot that are connected together. The first sub-receiving slot is located on the side of the second sub-receiving slot that is closer to the box assembly. The gasket is disposed in the first sub-receiving slot, and the limiting part is disposed in the second sub-receiving slot.

10. The battery device according to any one of claims 2 to 4, characterized in that, The bottom guard plate assembly includes: A bottom protective plate is provided on the bottom of the box assembly on the side facing away from the receiving space; A gasket is provided on the side of the bottom protective plate facing away from the box assembly; The fixing hole includes a first hole section and a second hole section that are connected together. The first hole section is located on the bottom protective plate, and the second hole section is located on the gasket.

11. The battery device according to claim 10, characterized in that, The gasket is disposed on the surface of the bottom guard plate facing away from the box assembly.

12. The battery device according to claim 10, characterized in that, The bottom guard plate has a fourth recessed groove on the side facing away from the box assembly. The fourth recessed groove is connected to the first hole section, and the gasket is disposed in the fourth recessed groove.

13. The battery device according to claim 12, characterized in that, The gasket has a fifth recessed groove on the side facing away from the box assembly, which is recessed relative to the surface of the gasket. The fifth recessed groove is connected to the second hole section, and the limiting part is disposed in the fifth recessed groove.

14. The battery device according to claim 12, characterized in that, The fourth settling tank includes a first sub-settling tank and a second sub-settling tank connected in series. The first hole section, the first sub-settling tank and the second sub-settling tank are connected in sequence. The gasket is disposed in the first sub-settling tank and the limiting part is disposed in the second sub-settling tank.

15. The battery device according to any one of claims 2 to 4, characterized in that, The limiting part includes a limiting boss, and the outer edge of the limiting boss facing the orthographic projection of the plug-in part is disposed around the plug-in part.

16. The battery device according to any one of claims 2 to 4, characterized in that, The limiting part includes: A connecting segment is attached to the end face of the plug-in portion along the axial direction of the plug-in portion; The limiting body is connected to the side of the connecting segment and is spaced apart along the circumference of the connecting segment.

17. The battery device according to claim 16, characterized in that, The bottom guard plate assembly includes a plurality of extension holes communicating with the fixing hole, the plurality of extension holes being spaced apart circumferentially around the fixing hole; The locking member further includes a plurality of extensions, which are connected to the outer peripheral side of the insertion part and the side of the limiting body along the circumferential direction of the connecting section. The plurality of extensions are spaced apart along the circumferential direction of the insertion part, and the extensions are respectively disposed in the corresponding extension holes.

18. The battery device according to claim 3, characterized in that, The locking assembly further includes a positioning element, which is disposed on the locking element and / or the fixing plate.

19. The battery device according to claim 1, characterized in that, The box assembly includes: The box body forms the aforementioned accommodating space; A water-cooled plate is disposed within the aforementioned accommodating space; The bottom protective plate assembly is located on the bottom of the box body, on the side facing away from the accommodating space.

20. The battery device according to claim 1, characterized in that, The box assembly includes: The box body forms the aforementioned accommodating space; A water-cooled plate is located at the bottom of the box body on the side facing away from the accommodating space; The bottom protective plate assembly is located on the side of the water-cooled plate facing away from the main body of the tank.

21. A battery housing, characterized in that, The battery housing includes: The housing assembly has a receiving space for accommodating individual battery cells; A bottom protective plate assembly is disposed on the bottom of the box assembly on the side opposite to the receiving space, and the bottom protective plate assembly is provided with fixing holes; A locking assembly, at least partially disposed between the box assembly and the bottom guard plate assembly, is used to detachably connect the bottom guard plate assembly and the box assembly. At least a portion of the locking component is inserted into the fixing hole, and one end of the locking component opposite to the box assembly extends to the outside of the fixing hole opposite to the box assembly, and the radial dimension along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole.

22. The battery housing according to claim 21, characterized in that, The locking assembly includes a locking member, which includes: The plug-in portion is at least partially disposed within the fixing hole, and one end of the plug-in portion is directly or indirectly detachably connected to the box assembly. A limiting part is connected to the other end of the plug-in part and is located outside the end of the fixing hole away from the box assembly. The maximum radial dimension of the limiting part along the radial direction of the fixing hole is greater than the radial dimension of the fixing hole.

23. The battery housing according to claim 22, characterized in that, The locking assembly includes a fixing plate and a locking member. The fixing plate is connected to the box assembly, and the side of the fixing plate facing away from the box assembly is connected to the plug-in part. The fixing plate is detachably connected to the box assembly and / or the plug-in part is detachably connected to the fixing plate.

24. The battery housing according to claim 23, characterized in that, The bottom guard plate assembly has a first recessed groove on the side facing the box assembly, which is recessed relative to the surface of the bottom guard plate assembly. The first recessed groove communicates with the fixing hole, and the fixing plate is disposed in the first recessed groove.

25. The battery housing according to any one of claims 22 to 24, characterized in that, The bottom protective plate assembly includes a bottom protective plate, which is disposed on the bottom of the box assembly on the side opposite to the receiving space, and the fixing hole is disposed on the bottom protective plate.

26. The battery housing according to any one of claims 22 to 24, characterized in that, The bottom guard plate assembly includes: A bottom protective plate is provided on the bottom of the box assembly on the side opposite to the receiving space, and the bottom protective plate is provided with a receiving groove; A gasket is disposed within the receiving groove, and a fixing hole is disposed within the gasket.

27. The battery housing according to any one of claims 22 to 24, characterized in that, The bottom guard plate assembly includes: A bottom protective plate is provided on the bottom of the box assembly on the side facing away from the receiving space; A gasket is provided on the side of the bottom protective plate facing away from the box assembly; The fixing hole includes a first hole section and a second hole section that are connected together. The first hole section is located on the bottom protective plate, and the second hole section is located on the gasket.

28. The battery housing according to claim 27, characterized in that, The bottom guard plate has a fourth recessed groove on the side facing away from the box assembly. The fourth recessed groove is connected to the first hole section, and the gasket is disposed in the fourth recessed groove.

29. The battery housing according to claim 28, characterized in that, The gasket has a fifth recessed groove on the side facing away from the box assembly, which is recessed relative to the surface of the gasket. The fifth recessed groove is connected to the second hole section, and the limiting part is disposed in the fifth recessed groove.

30. The battery housing according to claim 28, characterized in that, The fourth settling tank includes a first sub-settling tank and a second sub-settling tank connected in series. The first hole section, the first sub-settling tank and the second sub-settling tank are connected in sequence. The gasket is disposed in the first sub-settling tank and the limiting part is disposed in the second sub-settling tank.

31. The battery housing according to any one of claims 22 to 24, characterized in that, The limiting part includes a limiting boss, and the outer edge of the limiting boss facing the orthographic projection of the plug-in part is disposed around the plug-in part.

32. The battery housing according to any one of claims 22 to 24, characterized in that, The limiting part includes: A connecting segment is attached to the end face of the plug-in portion along the axial direction of the plug-in portion; The limiting body is connected to the side of the connecting segment and is spaced apart along the circumference of the connecting segment.

33. The battery housing according to claim 32, characterized in that, The bottom guard plate assembly includes a plurality of extension holes communicating with the fixing hole, the plurality of extension holes being spaced apart circumferentially around the fixing hole; The locking member further includes a plurality of extensions, which are connected to the outer peripheral side of the insertion part and the side of the limiting body along the circumferential direction of the connecting section. The plurality of extensions are spaced apart along the circumferential direction of the insertion part, and the extensions are respectively disposed in the corresponding extension holes.

34. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 20.

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