Battery assembly, bottom protection plate, and electrical components

Abstract

This utility model discloses a battery device, a bottom protective plate, and an electrical device, relating to the field of battery technology. The battery device includes a housing, a battery cell, and a bottom protective plate. The housing has a receiving space; the battery cell is received in the receiving space; the bottom protective plate is located at the bottom of the housing, and one end of the bottom protective plate along a first direction is located below the side wall of the housing; the bottom protective plate has a top surface and an end surface located at the end of the bottom protective plate along the first direction, the top surface facing the housing, and the top surface and the end surface are connected by a first transition surface. The technical solution of this application can improve the bottom-scraping performance of the battery device.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery device, a bottom protective plate, and an electrical device. Background Technology

[0002] The battery is a crucial power source for electric vehicles. Because the battery is located low on the vehicle, a bottom guard plate is installed under the battery compartment to prevent damage from scrapes and impacts. However, this bottom guard plate risks deforming upwards and puncturing the battery compartment during scrapes and impacts, thus damaging the battery. Utility Model Content

[0003] The main purpose of this utility model is to provide a battery device, a bottom protective plate, and an electrical device, which aims to improve the bottom-scraping performance of the battery device.

[0004] To achieve the above objectives, the battery device proposed in this utility model includes:

[0005] The box body has a storage space;

[0006] The battery cell is housed in the housing space; and

[0007] A bottom protective plate, wherein the bottom protective plate is located at the bottom of the box body, and one end of the bottom protective plate along the first direction is located below the side wall of the box body;

[0008] The bottom protective plate has a top surface and an end surface located at one end of the bottom protective plate along the first direction. The top surface is disposed facing the housing, and the top surface and the end surface are connected by a first transition surface.

[0009] In this embodiment, by extending the bottom protective plate to the lower part of the outer wall of the casing, so that the bottom protective plate faces the vertical surface of the casing, when the bottom protective plate is scraped or impacted and deforms upward, the bottom protective plate contacts the lower end of the casing side wall, thus preventing puncture of the casing and failure of the battery device's airtightness. Furthermore, a first transition surface is provided at the end edge of the bottom protective plate near the casing to avoid sharp edges on the end edge of the bottom protective plate, thereby reducing the risk of damage to the casing when the bottom protective plate contacts the casing. By employing the above method, the scraping performance of the battery device can be improved.

[0010] In one embodiment, the first transition surface is configured as a rounded surface or a chamfered surface.

[0011] This design effectively blunts the edge of the bottom guard plate using both the rounded and chamfered surfaces, and is relatively easy to manufacture. Furthermore, the rounded surface helps prevent stress concentration when the bottom guard plate contacts the enclosure, reducing the risk of damage to the enclosure when the bottom guard plate deforms upwards.

[0012] In one embodiment, when the first transition surface is set as an arc surface, the arc radius of the first transition surface is not less than 6mm;

[0013] Alternatively, if the first transition surface is set as a chamfered surface, the length of the right-angled side of the chamfered surface shall not be less than 6 mm.

[0014] This design ensures that the first transition surface effectively avoids sharp edges on the bottom guard plate and helps prevent stress concentration, thus reducing the risk of damage to the enclosure when the bottom guard plate deforms upwards.

[0015] In one embodiment, the bottom guard plate has a bottom surface facing away from the receiving space, and a second transition surface located between the bottom surface and the end surface and connected to the bottom surface and the end surface, wherein the second transition surface is configured as an arc surface or a chamfered surface.

[0016] By adopting the above method, when the battery device is scratched, the contact point between the bottom guard plate and the object being scratched is first the second transition surface. Setting the second transition surface as an arc surface or a chamfered surface can make the contact between the bottom guard plate and the object being scratched more gentle. The object being scratched can move relative to the bottom guard plate along the arc surface and the chamfered surface, which plays a certain buffering role, thereby avoiding problems such as excessive stress concentration and excessive impact force during scratching, and reducing the risk of damage to the bottom guard plate.

[0017] In one embodiment, when the second transition surface is set as an arc surface, the arc radius of the arc surface is not less than 6 mm;

[0018] Alternatively, if the second transition surface is set as a chamfered surface, the right-angled side of the chamfered surface shall not be less than 6mm.

[0019] This design ensures that the second transition surface can provide good cushioning and reduce the risk of damage to the bottom guard plate.

[0020] In one embodiment, the housing has two first sidewalls disposed opposite to each other along a first direction and two second sidewalls disposed opposite to each other along a second direction, the end of the bottom guard plate along the first direction being located below the first sidewalls; the second sidewalls extend to the bottom of the accommodating space, the bottom guard plate being located between the two second sidewalls, and the second direction being at an angle to the first direction.

[0021] This configuration allows the two second sidewalls to limit the bottom guard plate in the second direction, preventing it from shifting and improving the overall structural stability of the battery device.

[0022] In one embodiment, the bottom protective plate includes a first plate, a second plate, and a side sealing edge. The first plate and the second plate are arranged opposite to each other and spaced apart. The second plate is located on the side of the first plate that is away from the receiving space.

[0023] The side sealing edge is located at one end of the bottom protective plate along the first direction and is connected to the edges of the first plate and the second plate respectively. The first transition surface is provided at the connection position between the side sealing edge and the first plate.

[0024] This design involves using a double-layered bottom panel structure, creating a cavity between the first and second panels. This double-layered structure enhances the structural strength of the bottom panel, and when subjected to upward impact, the second panel can deform to absorb the impact energy. The cavity provides deformation space for the second panel, reducing the risk of impact force being transmitted to the first panel and causing deformation, thus lowering the risk of damage to the enclosure.

[0025] In one embodiment, the edge region of the second plate is provided with an avoidance notch, and the first plate is provided with a connection hole, the connection hole being provided corresponding to the avoidance notch.

[0026] In this configuration, the connecting holes on the first plate are used to pass through the locking element to connect the bottom guard plate to other structures. By providing an avoidance notch on the second plate and a second transition surface at the edge of the second plate, it is easy to attach the locking element.

[0027] In one embodiment, the bottom protective plate further includes reinforcing ribs sandwiched between the first plate and the second plate.

[0028] This design helps improve the structural strength and stability of the bottom guard plate, reduces the risk of deformation, and enhances its impact resistance.

[0029] This application also proposes a bottom cover plate for a battery device, the bottom cover plate having a top surface and a bottom surface disposed opposite to each other, and an end surface located at one end of the bottom cover plate along a first direction, the end surface being connected to the top surface via a first transition surface.

[0030] In this embodiment of the application, the bottom guard plate is used in the battery device. In specific applications, a transition surface can be provided at the end edge of the bottom guard plate near the box body to avoid the end edge of the bottom guard plate having sharp edges and being too sharp, so as to reduce the risk of damaging the box body when the bottom guard plate comes into contact with the box body, thereby improving the bottom scraping performance of the battery device.

[0031] In one embodiment, the first transition surface is configured as a rounded surface or a chamfered surface.

[0032] This design effectively blunts the edge of the bottom guard plate using both the rounded and chamfered surfaces, and is relatively easy to manufacture. Furthermore, the rounded surface helps prevent stress concentration when the bottom guard plate contacts the enclosure, reducing the risk of damage to the enclosure when the bottom guard plate deforms upwards.

[0033] In one embodiment, the bottom protective plate further includes a second transition surface located between the bottom surface and the end surface and connected to the bottom surface and the end surface, wherein the second transition surface is configured as an arc surface or a chamfered surface.

[0034] In practical applications, if the battery device is scratched, the contact point between the bottom guard plate and the object being scratched is the second transition surface. Setting the second transition surface as an arc surface or a chamfered surface can make the contact between the bottom guard plate and the object being scratched more gentle. The object being scratched can move relative to the bottom guard plate along the arc surface and the chamfered surface, which plays a certain buffering role. This avoids problems such as excessive stress concentration and excessive impact force during scratching, and reduces the risk of damage to the bottom guard plate.

[0035] In one embodiment, the bottom protective plate includes a first plate, a second plate, and a side sealing edge. The first plate and the second plate are arranged opposite to each other and spaced apart. The second plate is located on the side of the first plate that is away from the receiving space.

[0036] The side sealing edge is located at one end of the bottom protective plate along the first direction and is connected to the edges of the first plate and the second plate respectively. The first transition surface is provided at the connection position between the side sealing edge and the first plate.

[0037] This design involves using a double-layered bottom panel structure, creating a cavity between the first and second panels. This double-layered structure enhances the structural strength of the bottom panel, and when subjected to upward impact, the second panel can deform to absorb the impact energy. The cavity provides deformation space for the second panel, reducing the risk of impact force being transmitted to the first panel and causing deformation, thus lowering the risk of damage to the enclosure.

[0038] This application also proposes an electrical device, including a battery device as described in any of the foregoing embodiments. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0040] Figure 1 Here are structural diagrams of a vehicle provided according to some embodiments of this application;

[0041] Figure 2 This is an exploded view of the housing and individual battery cells in a battery device provided according to some embodiments of this application;

[0042] Figure 3 This is a partial structural diagram of the battery device with the casing and bottom cover plate assembled according to some embodiments of this application;

[0043] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0044] Figure 5 for Figure 3 Side view;

[0045] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0046] Figure 7 This is a structural diagram of a bottom protective plate provided according to some embodiments of this application;

[0047] Figure 8 for Figure 7 Enlarged view of point C in the middle.

[0048] Explanation of icon numbers:

[0049] 100. Battery assembly; 10. Housing; 11. First part; 12. Second part; 13. First side wall; 14. Second side wall; 15. Accommodation space; 20. Battery cell; 30. Bottom protective plate; 31. Top surface; 32. Bottom surface; 33. End face; 34. First transition surface; 35. Second transition surface; 36. First plate; 361. Connecting hole; 37. Second plate; 371. Clearance notch; 38. Side sealing edge; 39. Reinforcing rib;

[0050] 1000, vehicle; 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction.

[0051] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[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 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.

[0057] 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).

[0058] 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.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0060] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0061] The battery is a crucial power source for electric vehicles. Because the battery is located low on the vehicle, a bottom guard plate is installed under the battery compartment to prevent damage from scrapes and impacts. However, this bottom guard plate risks deforming upwards and puncturing the battery compartment during scrapes and impacts, thus damaging the battery.

[0062] Based on the above considerations, in order to improve the bottom-scraping performance of the battery device, the battery device proposed in this application includes a housing, a battery cell, and a bottom protective plate. The housing has a receiving space; the battery cell is received in the receiving space; the bottom protective plate is located at the bottom of the housing, and one end of the bottom protective plate along the first direction is located below the side wall of the housing; the bottom protective plate has a top surface and an end surface located at one end of the bottom protective plate along the first direction, the top surface is facing the housing, and the top surface and the end surface are connected by a first transition surface.

[0063] In this embodiment, by extending the bottom protective plate to the lower part of the outer wall of the casing, so that the bottom protective plate faces the vertical surface of the casing, when the bottom protective plate is scraped or impacted and deforms upward, the bottom protective plate contacts the lower end of the casing side wall, thus preventing puncture of the casing and failure of the battery device's airtightness. Furthermore, a first transition surface is provided at the end edge of the bottom protective plate near the casing to avoid sharp edges on the end edge of the bottom protective plate, thereby reducing the risk of damage to the casing when the bottom protective plate contacts the casing. By employing the above method, the scraping performance of the battery device can be improved.

[0064] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be composed of battery cells and battery devices disclosed in this application. This can improve the structural strength and modal frequency of the battery device, and enhance its performance stability.

[0065] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0066] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0067] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery is installed inside the vehicle 1000, and the battery can be located at the bottom, front, or rear of the vehicle 1000. The battery can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0068] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0069] Please refer to Figure 2 , Figure 2 This is an exploded view of the housing 10 and the battery cell 20 in a battery device 100 provided according to some embodiments of this application.

[0070] The battery cell 20 is housed within the housing 10. The housing 10 provides a housing space 15 for the battery cell 20, and can employ various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, collectively defining the housing space 15 for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 together define the housing space 15. Alternatively, both the first portion 11 and the second portion 12 may be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0071] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, multiple battery cells 20 can first be connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, the battery device 100 may also include a busbar component for realizing the electrical connection between the multiple battery cells 20.

[0072] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0073] Combined with reference Figures 3 to 6 , Figure 3 and Figure 4 These are partial structural diagrams and enlarged views of the assembled state of the housing 10 and the bottom protective plate 30 in the battery device 100 provided according to some embodiments of this application;

[0074] Figure 5 for Figure 3 Side view, Figure 6 for Figure 5A partial enlarged view. The battery device 100 includes a housing 10, a battery cell 20, and a bottom protective plate 30. The housing 10 has a receiving space 15; the battery cell 20 is received in the receiving space 15; the bottom protective plate 30 is located at the bottom of the housing 10, and one end of the bottom protective plate 30 along the first direction X is located below the side wall of the housing 10; the bottom protective plate 30 has a top surface 31 and an end surface 33 located at one end of the bottom protective plate 30 along the first direction X, the top surface 31 is disposed facing the housing 10, and the top surface 31 and the end surface 33 are connected by a first transition surface 34.

[0075] The housing 10 typically includes a bottom plate and a frame, which together form a receiving space 15 for accommodating the battery cell 20. The frame can be a cuboid, a cylindrical, or other irregular shape. A bottom guard plate 30 is positioned below the bottom plate and extends along one end of the first direction X to the bottom of the frame. It can be flush with or extend beyond the outer wall of the frame. In this embodiment, the first direction X and the second direction Y are parallel to the surface of the bottom guard plate 30, and the third direction Z is the height direction of the battery device 100. When the battery device 100 is used in a vehicle 1000, the first direction X is typically the driving direction of the vehicle 1000. When scraping occurs, the end of the bottom guard plate 30 along the first direction X contacts the object being scraped, causing an impact collision in the first direction X, which leads to deformation of the end of the bottom guard plate 30 along the third direction Z towards the housing 10.

[0076] In this embodiment, since the end of the bottom protective plate 30 is located below the frame, the bottom protective plate 30 faces the frame of the housing 10. When the bottom protective plate 30 is scraped or impacted and deforms upward, it contacts the lower end of the frame of the housing 10, thus preventing it from piercing the bottom plate of the housing 10 and causing the battery device 100 to fail to maintain its airtightness. Furthermore, a first transition surface 34 is provided at the end edge of the bottom protective plate 30 near the housing 10. The first transition surface 34 connects the end face 33 and the top face 31 of the bottom protective plate 30. The top face 31 of the bottom protective plate 30 is the side surface of the bottom protective plate 30 facing the housing 10, and the bottom face 32 of the bottom protective plate 30 is the side surface of the bottom protective plate 30 facing away from the housing 10. Optionally, the first transition surface 34 can be set as an arc surface, a chamfered surface, a wavy surface, or other shapes. This design avoids sharp edges on the end of the bottom guard plate 30, reducing the risk of damage to the housing 10 when the bottom guard plate 30 comes into contact with the housing 10. By employing this method, the bottom-scraping performance of the battery device 100 can be improved.

[0077] Please refer to Figure 4 and Figure 6 In one embodiment, the first transition surface 34 is configured as a rounded surface or a chamfered surface.

[0078] In this embodiment, by providing rounded corners or chamfers at the end edges of the bottom guard plate 30, an arc surface or chamfered surface is formed as the first transition surface 34. Both rounded corners and chamfers can effectively blunt the end edges of the bottom guard plate 30 and are relatively easy to process. In addition, the arc surface can better avoid the problem of stress concentration when the bottom guard plate 30 and the housing 10 come into contact, reducing the risk of damaging the housing 10 when the bottom guard plate 30 deforms upward.

[0079] In one embodiment, when the first transition surface 34 is set as an arc surface, the arc radius of the first transition surface 34 is not less than 6 mm.

[0080] In this embodiment, a rounded corner is provided at the upper edge of the end of the bottom protective plate 30 to form an arc surface as the first transition surface 34. The radius of the rounded corner can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. This arrangement ensures that the first transition surface 34 can effectively avoid sharp edges at the end of the bottom protective plate 30 and effectively avoid stress concentration, thereby reducing the risk of damage to the housing 10 when the bottom protective plate 30 deforms upward.

[0081] In one embodiment, when the first transition surface 34 is set as a chamfered surface, the length of the right-angled side of the chamfered surface is not less than 6 mm.

[0082] In this embodiment, a chamfer is provided at the upper edge of the end of the bottom protective plate 30 to form a chamfered surface as the first transition surface 34. The length of the right-angled side of the chamfer can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. It is understood that the chamfer has two right-angled sides, and the lengths of the two right-angled sides can be the same or different. By adopting the above method, it is ensured that the setting of the first transition surface 34 can better avoid the sharp edge of the end of the bottom protective plate 30 and play a better role in avoiding stress concentration, thereby reducing the risk of damage to the housing 10 when the bottom protective plate 30 deforms upward.

[0083] Please refer to Figure 4 and Figure 6 In one embodiment, the bottom guard plate 30 has a bottom surface 32 disposed opposite to the receiving space 15, and a second transition surface 35 located between the bottom surface 32 and the end surface 33 and connected to the bottom surface 32 and the end surface 33. The second transition surface 35 is configured as an arc surface or a chamfered surface.

[0084] In this embodiment, a second transition surface 35 is provided at the edge of the bottom protective plate 30 away from the housing 10. The second transition surface 35 connects the end face 33 and the bottom face 32 of the bottom protective plate 30. When the battery device 100 is scraped, the contact point between the bottom protective plate 30 and the object being scraped is first the second transition surface 35. Setting the second transition surface 35 as an arc surface or a chamfered surface can make the contact between the bottom protective plate 30 and the object being scraped more gentle. The object being scraped can move relative to the bottom protective plate 30 along the arc surface and the chamfered surface, which plays a certain buffering role, thereby avoiding problems such as excessive stress concentration and excessive impact force during scraping, and reducing the risk of damage to the bottom protective plate 30. Optionally, the second transition surface 35 can be directly connected to the bottom face 32, or it can be indirectly connected through a smaller transition surface.

[0085] In one embodiment, when the second transition surface 35 is set as an arc surface, the arc radius of the arc surface is not less than 6 mm;

[0086] In this embodiment, a rounded corner is provided at the lower edge of the bottom guard plate 30 to form an arc surface as the second transition surface 35. The radius of the rounded corner can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. This setting avoids the rounded corner being too small, ensuring that the second transition surface 35 can play a better buffering role and reduce the risk of damage to the bottom guard plate 30.

[0087] In one embodiment, when the second transition surface 35 is set as a chamfered surface, the right-angled side of the chamfered surface is not less than 6mm.

[0088] In this embodiment, a chamfer is provided at the lower edge of the bottom guard plate 30 to form a chamfered surface as a second transition surface 35. The length of the right-angled side of the chamfer can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. It is understood that the chamfer has two right-angled sides, and the lengths of the two right-angled sides can be the same or different. This method avoids the chamfer being too small, ensuring that the second transition surface 35 can provide better cushioning and reduce the risk of damage to the bottom guard plate 30.

[0089] Please refer to Figure 3 and Figure 4 In one embodiment, the housing 10 has two first sidewalls 13 arranged opposite each other along a first direction X, and two second sidewalls 14 arranged opposite each other along a second direction Y. The end of the bottom guard plate 30 along the first direction X is located below the first sidewalls 13. The second sidewalls 14 extend to the bottom of the receiving space 15, and the bottom guard plate 30 is located between the two second sidewalls 14. The second direction Y is arranged at an angle to the first direction X.

[0090] In this embodiment, the frame of the housing 10 has two first sidewalls 13 arranged opposite each other along the first direction X and two second sidewalls 14 arranged opposite each other along the second direction Y. The first sidewalls 13 and the second sidewalls 14 can be directly connected or connected through other sidewalls. The end of the bottom protective plate 30 along the first direction X is located below the first sidewall 13. When the bottom protective plate 30 deforms upward, it abuts against the bottom of the first sidewall 13, thus preventing the bottom protective plate 30 from piercing the bottom plate of the housing 10. The two second sidewalls 14 extend to the same height as the bottom protective plate 30, and the bottom protective plate 30 is positioned between the two second sidewalls 14. This utilizes the two second sidewalls 14 to limit the bottom protective plate 30 in the second direction Y, preventing the bottom protective plate 30 from shifting and improving the overall structural stability of the battery device 100.

[0091] Please refer to Figures 6 to 8 In one embodiment, the bottom protective plate 30 includes a first plate 36, a second plate 37, and a side sealing edge 38. The first plate 36 and the second plate 37 are arranged opposite to each other and spaced apart. The second plate 37 is located on the side of the first plate 36 that is away from the receiving space 15. The side sealing edge 38 is located at one end of the bottom protective plate 30 along the first direction X and is connected to the edges of the first plate 36 and the second plate 37 respectively. A first transition surface 34 is provided at the connection position between the side sealing edge 38 and the first plate 36.

[0092] In this embodiment, the bottom protective plate 30 is configured as a double-layer plate structure, forming a cavity between the first plate 36 and the second plate 37. The double-layer plate structure can improve the structural strength of the bottom protective plate 30, and when the bottom protective plate 30 is subjected to an upward impact, the second plate 37 can generate a certain deformation to absorb the impact energy. The cavity can provide deformation space for the second plate 37, which can reduce the risk of the impact force being transmitted to the first plate 36 and causing the first plate 36 to deform, thereby reducing the risk of damage to the housing 10.

[0093] Please refer to Figure 8 In one embodiment, the edge region of the second plate 37 is provided with an avoidance notch 371, and the first plate 36 is provided with a connection hole 361, which is provided corresponding to the avoidance notch 371.

[0094] In this configuration, the connecting hole 361 on the first plate 36 is used to pass through bolts, rivets and other locking components to connect the bottom guard plate 30 to other structures. The clearance notch 371 is provided on the second plate 37. When the second transition surface 35 is provided at the edge of the second plate 37, the second transition surface 35 is prevented from affecting the fixing of the locking component, so as to facilitate the locking component to be attached.

[0095] Please refer to Figure 8 In one embodiment, the bottom protective plate 30 further includes reinforcing ribs 39 sandwiched between the first plate 36 and the second plate 37.

[0096] This design helps to improve the structural strength and stability of the bottom guard plate 30, reduce the risk of deformation of the bottom guard plate 30, and improve the impact resistance of the bottom guard plate 30.

[0097] Please refer to Figure 7 and Figure 8 This application also proposes a bottom cover plate 30 for a battery device 100. The bottom cover plate 30 has a top surface 31 and a bottom surface 32 disposed opposite to each other, and an end surface 33 located at one end of the bottom cover plate 30 along a first direction X. The end surface 33 and the top surface 31 are connected by a first transition surface 34, which is configured as an arc surface or a chamfered surface.

[0098] In this embodiment, the bottom guard plate 30 is used in the battery device 100. In specific application, the top surface 31 of the bottom guard plate 30 faces the housing 10. A first transition surface 34 is provided at the end edge of the bottom guard plate 30. The first transition surface 34 is used to connect the end surface 33 and the top surface 31 of the bottom guard plate 30, so as to avoid the bottom guard plate 30 having sharp edges near the end edge of the housing 10 and being too sharp. This reduces the risk of the bottom guard plate 30 deforming upward when it is scratched and puncturing the housing 10 when it comes into contact with the housing 10, thereby improving the bottom scratch performance of the battery device 100.

[0099] Please refer to Figure 8 According to some embodiments of this application, the first transition surface 34 is configured as a chamfered surface or a rounded surface.

[0100] In this embodiment, by providing rounded corners or chamfers at the end edges of the bottom guard plate 30, an arc surface or chamfered surface is formed as the first transition surface 34. Both rounded corners and chamfers can effectively blunt the end edges of the bottom guard plate 30 and are relatively easy to process. In addition, the arc surface can better avoid the problem of stress concentration when the bottom guard plate 30 and the housing 10 come into contact, reducing the risk of damaging the housing 10 when the bottom guard plate 30 deforms upward.

[0101] Optionally, if the first transition surface 34 is set as an arc surface, the arc radius of the first transition surface 34 shall not be less than 6 mm.

[0102] In this embodiment, a rounded corner is provided at the upper edge of the end of the bottom protective plate 30 to form an arc surface as the first transition surface 34. The radius of the rounded corner can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. This arrangement ensures that the first transition surface 34 can effectively avoid sharp edges at the end of the bottom protective plate 30 and effectively avoid stress concentration, thereby reducing the risk of damage to the housing 10 when the bottom protective plate 30 deforms upward.

[0103] In one embodiment, when the first transition surface 34 is set as a chamfered surface, the length of the right-angled side of the chamfered surface is not less than 6 mm.

[0104] In this embodiment, a chamfer is provided at the upper edge of the end of the bottom protective plate 30 to form a chamfered surface as the first transition surface 34. The length of the right-angled side of the chamfer can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. It is understood that the chamfer has two right-angled sides, and the lengths of the two right-angled sides can be the same or different. By adopting the above method, it is ensured that the setting of the first transition surface 34 can better avoid the sharp edge of the end of the bottom protective plate 30 and play a better role in avoiding stress concentration, thereby reducing the risk of damage to the housing 10 when the bottom protective plate 30 deforms upward.

[0105] Please refer to Figure 8 According to some embodiments of this application, the bottom guard plate 30 has a second transition surface 35 located between the bottom surface 32 and the end surface 33 and connected to the bottom surface 32 and the end surface 33. The second transition surface 35 is configured as an arc surface or a chamfered surface.

[0106] In this embodiment, a second transition surface 35 is provided on the lower edge of the bottom protective plate 30 away from the housing 10. When the battery device 100 is scratched, the contact point between the bottom protective plate 30 and the object being scratched is first the second transition surface 35. Setting the second transition surface 35 as an arc surface or a chamfered surface can make the contact between the bottom protective plate 30 and the object being scratched more gentle. The object being scratched can move relative to the bottom protective plate 30 along the arc surface and the chamfered surface, which plays a certain buffering role, thereby avoiding problems such as excessive stress concentration and excessive impact force during scratching, and reducing the risk of damage to the bottom protective plate 30. Optionally, the second transition surface 35 can be directly connected to the bottom surface 32, or it can be indirectly connected through a smaller transition surface.

[0107] In one embodiment, when the second transition surface 35 is set as an arc surface, the arc radius of the arc surface is not less than 6 mm;

[0108] In this embodiment, a rounded corner is provided at the lower edge of the bottom guard plate 30 to form an arc surface as the second transition surface 35. The radius of the rounded corner can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. This setting avoids the rounded corner being too small, ensuring that the second transition surface 35 can play a better buffering role and reduce the risk of damage to the bottom guard plate 30.

[0109] In one embodiment, when the second transition surface 35 is set as a chamfered surface, the right-angled side of the chamfered surface is not less than 6mm.

[0110] In this embodiment, a chamfer is provided at the lower edge of the bottom guard plate 30 to form a chamfered surface as a second transition surface 35. The length of the right-angled side of the chamfer can be set to any value of 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, or greater than 6mm. It is understood that the chamfer has two right-angled sides, and the lengths of the two right-angled sides can be the same or different. This method avoids the chamfer being too small, ensuring that the second transition surface 35 can provide better cushioning and reduce the risk of damage to the bottom guard plate 30.

[0111] Please refer to Figure 8 According to some embodiments of this application, the bottom protective plate 30 includes a first plate 36, a second plate 37, and a side sealing edge 38. The first plate 36 and the second plate 37 are arranged opposite to each other and spaced apart. The second plate 37 is located on the side of the first plate 36 that is away from the receiving space 15. The side sealing edge 38 is located at one end of the bottom protective plate 30 along the first direction X and is connected to the edges of the first plate 36 and the second plate 37 respectively. A first transition surface 34 is provided at the connection position between the side sealing edge 38 and the first plate 36.

[0112] In this embodiment, the bottom protective plate 30 is configured as a double-layer plate structure, forming a cavity between the first plate 36 and the second plate 37. The double-layer plate structure can improve the structural strength of the bottom protective plate 30, and when the bottom protective plate 30 is subjected to an upward impact, the second plate 37 can generate a certain deformation to absorb the impact energy. The cavity can provide deformation space for the second plate 37, which can reduce the risk of the impact force being transmitted to the first plate 36 and causing the first plate 36 to deform, thereby reducing the risk of damage to the housing 10.

[0113] Please refer to Figure 8 In one embodiment, the edge region of the second plate 37 is provided with an avoidance notch 371, and the first plate 36 is provided with a connection hole 361, which is provided corresponding to the avoidance notch 371.

[0114] In this configuration, the connecting hole 361 on the first plate 36 is used to pass through bolts, rivets and other locking components to connect the bottom guard plate 30 to other structures. The clearance notch 371 is provided on the second plate 37. When the second transition surface 35 is provided at the edge of the second plate 37, the second transition surface 35 is prevented from affecting the fixing of the locking component, so as to facilitate the locking component to be attached.

[0115] Please refer to Figure 8 In one embodiment, the bottom protective plate 30 further includes reinforcing ribs 39 sandwiched between the first plate 36 and the second plate 37.

[0116] This design helps to improve the structural strength and stability of the bottom guard plate 30, reduce the risk of deformation of the bottom guard plate 30, and improve the impact resistance of the bottom guard plate 30.

[0117] This application also proposes an electrical device, including the battery device 100 as described in any of the foregoing embodiments.

[0118] The electrical devices mentioned in the embodiments of this application can be, but are 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.

[0119] Since the electrical device proposed in this application can adopt the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0120] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A battery device, characterized in that, include: The box body has a storage space; A single battery cell is housed within the aforementioned housing space; as well as A bottom protective plate, wherein the bottom protective plate is located at the bottom of the box body, and one end of the bottom protective plate along the first direction is located below the side wall of the box body; The bottom protective plate has a top surface and an end surface located at one end of the bottom protective plate along the first direction. The top surface is disposed facing the housing, and the top surface and the end surface are connected by a first transition surface.

2. The battery device of claim 1, wherein The first transition surface is set as a rounded surface or a chamfered surface.

3. The battery device of claim 2, wherein When the first transition surface is set as an arc surface, the arc radius of the first transition surface is not less than 6mm; Alternatively, if the first transition surface is set as a chamfered surface, the length of the right-angled side of the chamfered surface shall not be less than 6 mm.

4. The battery device of claim 1, wherein The bottom protective plate has a bottom surface facing away from the receiving space, and a second transition surface located between the bottom surface and the end surface and connected to the bottom surface and the end surface. The second transition surface is configured as an arc surface or a chamfered surface.

5. The battery device of claim 4, wherein When the second transition surface is set as an arc surface, the radius of the arc surface is not less than 6mm; Alternatively, if the second transition surface is set as a chamfered surface, the right-angled side of the chamfered surface shall not be less than 6mm.

6. The battery device as defined in any one of claims 1 to 5, characterized by The enclosure has two first side walls that are arranged opposite each other along the first direction, and two second side walls that are arranged opposite each other along the second direction; The end of the bottom protective plate along the first direction is located below the first side wall; The second sidewall extends below the receiving space, and the bottom guard plate is located between the two second sidewalls, with the second direction forming an angle with the first direction.

7. The battery device as defined in any one of claims 1 to 5, characterized by The bottom protective plate includes a first plate, a second plate, and a side sealing edge. The first plate and the second plate are opposite to each other and spaced apart. The second plate is located on the side of the first plate that is away from the accommodating space. The side sealing edge is located at one end of the bottom protective plate along the first direction and is connected to the edges of the first plate and the second plate respectively. The first transition surface is provided at the connection position between the side sealing edge and the first plate.

8. The battery device of claim 7, wherein The second plate has an avoidance notch at its edge, and the first plate has a connection hole, which is provided corresponding to the avoidance notch. And / or, the bottom protective plate further includes reinforcing ribs sandwiched between the first plate and the second plate.

9. A bottom guard plate for a battery device, characterized by The bottom protective plate has a top surface and a bottom surface facing away from each other, and an end surface located at one end of the bottom protective plate along a first direction, the end surface being connected to the top surface via a first transition surface.

10. The underpan according to claim 9, wherein The first transition surface is set as a rounded surface or a chamfered surface; And / or, the bottom guard plate further includes a second transition surface located between the bottom surface and the end surface and connected to the bottom surface and the end surface, wherein the second transition surface is configured as an arc surface or a chamfered surface; And / or, the bottom protective plate includes a first plate, a second plate, and a side sealing edge, wherein the first plate and the second plate are opposite to each other and spaced apart, and the second plate is located on the side of the first plate that is away from the top surface; The side sealing edge is located at one end of the bottom protective plate along the first direction and is connected to the edges of the first plate and the second plate respectively. The first transition surface is provided at the connection position between the side sealing edge and the first plate.

11. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 8.

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