Battery device and electric device

Abstract

The utility model relates to a battery device and a power utilization device. The battery device comprises a first plate body with a mounting hole; the first plate body is further provided with at least one through groove, and the hole wall of the mounting hole is sunken in the radial direction to form each through groove. The fastening piece comprises at least one boss, and the boss can penetrate through the penetrating groove in the thickness direction of the first plate body; the fastener penetrates through the mounting hole of the first plate body, and the mounting hole and the fastener are limited in the circumferential direction. The battery device and the power utilization device provided by the embodiment of the utility model have the advantage of high safety.

Description

Technical Field

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

[0002] As the market share of electric vehicles gradually increases, the driving conditions and usage scenarios for electric vehicles are becoming more diverse and complex. When the battery pack is placed inside the electric vehicle, higher requirements are placed on the protection of the battery pack enclosure.

[0003] In particular, many fasteners used in the battery casing are press-fit fasteners; however, press-fit fasteners are prone to rotation and falling off, which can lead to safety hazards in the battery device. Utility Model Content

[0004] Therefore, it is necessary to provide a battery device and an electrical device to address the safety hazards posed by battery devices.

[0005] A first aspect of this application provides a battery device, comprising: a first plate having a mounting hole; the first plate further having at least one through slot, each through slot being formed by a radial recess in the wall of the mounting hole; and a fastener having at least one boss that can pass through the through slot along the thickness direction of the first plate; the fastener passing through the mounting hole of the first plate, the mounting hole being circumferentially limited by the fastener.

[0006] In one embodiment, the fastener includes an integrally connected column and a nut; the boss is disposed on the peripheral side of the column; the nut is disposed at one end of the column and axially limited at the mounting hole.

[0007] In one embodiment, the first plate includes a limiting step that protrudes radially from the inner wall of the mounting hole, wherein each of the through slots is circumferentially spaced on the limiting step; the boss passes through the through slot and can rotate to the bottom of the limiting step under the action of an external force to be axially limited with the limiting step.

[0008] In one embodiment, along the thickness direction of the first plate, the limiting step is recessed inward on the bottom surface of the nut to form at least one positioning groove, and the boss is engaged with the positioning groove.

[0009] In one embodiment, the thickness of the limiting step is A, the distance from the boss to the nut is B, and the conditions are 0mm < AB ≤ 0.2mm.

[0010] In one embodiment, there are multiple through slots and multiple positioning slots, and all the through slots and positioning slots are distributed alternately and at intervals along the circumference of the mounting hole on the limiting step;

[0011] The number of protrusions is multiple, and all of the protrusions are distributed circumferentially on the circumferential surface of the column.

[0012] In one embodiment, the column includes an integrally connected smooth section and a threaded section, the nut is disposed at one end of the smooth section away from the threaded section, and the boss is disposed on the peripheral side of the smooth section.

[0013] In one embodiment, the boss has a guide bevel formed on its top edge facing the nut.

[0014] In one embodiment, the battery device includes a battery cell and a housing with a receiving space; the battery cell is housed in the receiving space of the housing; the first plate is a bottom protective plate, and the first plate is fixedly connected to the bottom plate of the housing by the fasteners.

[0015] A second aspect of this application provides an electrical device including the battery device described above.

[0016] The beneficial effects are:

[0017] This application provides a first plate with mounting holes and fasteners. The fasteners pass through the mounting holes of the first plate, which can be used to connect the first plate to other parts of the battery device. This ensures that the first plate is axially fixed to other parts of the battery device along its thickness direction, preventing loosening. At the same time, by providing mounting holes and circumferential limiting for the fasteners, the stability and anti-detachment ability of the fasteners after installation can be significantly enhanced, avoiding problems such as easy rotation and easy detachment. This greatly improves the structural strength and connection reliability of the battery device, helps to extend the service life of the battery device, reduces safety hazards caused by fastener failure, and further improves the adaptability and stability of the battery device in various complex environments, giving the battery device a high level of safety performance.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0020] Figure 2This is an exploded structural diagram of a battery provided in some embodiments of this application.

[0021] Figure 3 This is a schematic diagram of the structure of a battery module provided in some embodiments of this application.

[0022] Figure 4 This is an exploded structural diagram of a battery cell provided in some embodiments of this application.

[0023] Figure 5 This is a schematic diagram illustrating the installation of a first plate and fasteners in a battery device provided in some embodiments of this application.

[0024] Figure 6 This is a schematic diagram of the structure of a fastener provided in some embodiments of this application.

[0025] Figure 7 This is a schematic diagram of the structure of the first plate provided in some embodiments of this application.

[0026] Figure 8 for Figure 7 The CC cross-sectional view of the structure shown.

[0027] Figure 9 This is a schematic diagram of the installation of the first plate, the housing, and the fasteners provided for some embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] Vehicle-1000; Battery-100, Box-110, Base Plate-110a, First Part-111, Second Part-112, First Plate-113, Mounting Hole-114, Through Slot-115, Limiting Step-116, Top Surface-117, Bottom Surface-118, Battery Module-120, Battery Cell-121, End Cap-122, Housing-123, Electrode Assembly-124, Electrode Terminal-125, Controller-200, Motor-300; Fastener-30, Column-31, Smooth Section-311, Threaded Section-312, Nut-32, Boss-33, Bottom End-331, Guide Inclined Section-332, Thickness Direction-Z. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] In the description of the embodiments of this application, if the technical terms such as "first" and "second" appear, these terms are used only for descriptive purposes to distinguish different objects, and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0033] 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.

[0034] 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.

[0035] In the description of the embodiments of this application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise explicitly specified. Similarly, if the term "multiple sets" appears, "multiple sets" refers to two or more sets (including two sets), and if the term "multiple pieces" appears, "multiple pieces" refers to two or more pieces (including two pieces).

[0036] In the description of the embodiments of this application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms 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 do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0037] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] 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.

[0041] Because different electrical devices are used in different scenarios, batteries must be able to adapt to various harsh operating conditions when used in different devices. For example, when batteries are used in electric vehicles, the driving conditions and usage scenarios are very diverse and complex. Batteries are usually mounted on the chassis of electric vehicles, which places higher demands on the battery pack.

[0042] In related technologies, many fasteners used in battery casings are press-fit fasteners. Due to factors such as installation process, interface materials, plate thickness, and vibration during use, press-fit fasteners are susceptible to damage. However, they carry the risk of rotation and detachment, leading to connection failure or loosening, ultimately causing safety hazards in the battery device.

[0043] To mitigate safety issues in battery devices, circumferential limits can be provided for fasteners in the design; this avoids the risk of rotation and detachment, thereby preventing safety hazards in the battery device and improving its safety performance.

[0044] This application provides a battery device and an electrical device. 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.

[0045] It should be understood that the technical solutions described in the embodiments of this application are not limited to the batteries and electrical devices described above, but can also be applied to all batteries including housings and electrical devices using batteries. However, for the sake of brevity, an embodiment of this application using a vehicle 1000 as an example will be used for illustration.

[0046] 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 device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 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.

[0047] 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.

[0048] Figure 2 Exploded views of battery devices provided in some embodiments of this application; Figure 3This is a schematic diagram of the structure of a battery module provided in some embodiments of this application. Please refer to... Figure 2 and Figure 3 To meet different power demands, the battery device 100 may include multiple battery cells 121 and a housing 110. A battery cell 121 is the smallest unit that makes up the battery module 120 or battery pack. Multiple battery cells 121 may be connected in series and / or in parallel via electrode terminals for various applications. The housing 110 is used to house the battery cells 121 or battery module 120 to prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells 121.

[0049] The housing 110 can adopt various structures. In some embodiments, the housing 110 may include a first part 111 and a second part 112, which overlap each other, and together define a receiving space for accommodating the battery cell 121. The second part 112 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, with the first part 111 covering the open side of the second part 112 so that the first part 111 and the second part 112 together define the receiving space; the first part 111 and the second part 112 may also be hollow structures with one side open, with the open side of the first part 111 covering the open side of the second part 112. Of course, the housing 110 formed by the first part 111 and the second part 112 can be of various shapes, such as a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The embodiments of this application are not limited in this respect. The material of the housing 110 can be an alloy material such as aluminum alloy or iron alloy, or a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin. The embodiments of this application are not limited to this.

[0050] In the embodiments of this application, multiple battery cells 121 can be directly assembled into a battery pack, or they can first be assembled into a battery module 120, and then the battery modules 120 can be assembled into a battery pack. Specifically, multiple battery cells 121 can be directly connected in series, in parallel, or in a mixed manner to form a whole, and then the whole composed of multiple battery cells 121 can be housed in a housing 110. Alternatively, multiple battery cells 121 can first be connected in series, in parallel, or in a mixed manner to form a battery module 120, and then multiple battery modules 120 can be connected in series, in parallel, or in a mixed manner to form a whole, and housed in a housing 110.

[0051] The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar for realizing electrical connection between multiple battery cells 121.

[0052] Each battery cell 121 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 121 can be cylindrical, flat, cuboid, or other shapes. Battery cells 121 are generally classified into three types according to their packaging method: cylindrical battery cells, cuboid battery cells, and pouch battery cells; the embodiments of this application are not limited to these. However, for the sake of brevity, the following embodiments will use a cuboid lithium-ion battery cell 121 as an example for description.

[0053] Please refer to Figure 4 , Figure 4 This is an exploded structural diagram of a battery cell 121 provided in some embodiments of this application. The battery cell 121 includes an end cap 122, a housing 123, an electrode assembly 124, and other functional components.

[0054] End cap 122 refers to a component that covers the opening of housing 123 to isolate the internal environment of electrode assembly 124 from the external environment. The shape of end cap 122 can be adapted to the shape of housing 123 to fit it. Optionally, end cap 122 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 122 is less prone to deformation under pressure and impact, allowing the battery cell 121 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 125 can be provided on end cap 122. Electrode terminals 125 can be used for electrical connection with electrode assembly 124 to output or input electrical energy to battery cell 121. In some embodiments, end cap 122 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 121 reaches a threshold. The material of end cap 122 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 122. The insulating element can be used to isolate the electrical connection components within the housing 123 from the end cap 122 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0055] The housing 123 is an assembly used to cooperate with the end cap 122 to form the internal environment of the battery cell 121, wherein the formed internal environment can accommodate the electrode assembly 124, electrolyte, and other components. The housing 123 and the end cap 122 can be independent components. An opening can be provided on the housing 123, and the end cap 122 closes the opening to form the internal environment of the battery cell 121. Alternatively, the end cap 122 and the housing 123 can be integrated. Specifically, the end cap 122 and the housing 123 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 123, the end cap 122 closes the housing 123. The housing 123 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 123 can be determined according to the specific shape and size of the electrode assembly 124. The shell 123 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0056] Electrode assembly 124 is the component in the battery cell 121 where electrochemical reactions occur. The housing 123 may contain one or more electrode assemblies 124. Electrode assembly 124 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of electrode assembly 124, while the portions of the positive and negative electrode sheets without active material each constitute a tab (not shown). The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 125 to form a current loop.

[0057] Please refer to Figures 5 to 8 As shown, Figure 5 This is a schematic diagram illustrating the installation of a first plate and fasteners in a battery device provided in some embodiments of this application. Figure 6 This is a schematic diagram of the structure of a fastener provided in some embodiments of this application. Figure 7 This is a schematic diagram of the structure of the first plate provided in some embodiments of this application. Figure 8 for Figure 7 The CC cross-sectional view of the structure shown.

[0058] The first aspect of this application provides a battery device 100, including a first plate 113 and a fastener 30; wherein the first plate 113 has a mounting hole 114, the fastener 30 passes through the mounting hole 114 of the first plate 113, and the mounting hole 114 and the fastener 30 are circumferentially limited.

[0059] The fastener 30 passes through the mounting hole 114 of the first plate 113, which can be used to connect the first plate 113 to other parts of the battery device 100, such as the bottom plate 100a of the housing 110 (mentioned below). This ensures that the first plate 113 is axially fixed to other parts of the battery device 100 along its thickness direction, preventing loosening. At the same time, by setting the mounting hole 114 and the fastener 30 for circumferential limiting, the stability and anti-detachment ability of the fastener 30 after installation can be significantly enhanced, avoiding problems such as easy rotation and easy detachment. This greatly improves the structural strength and connection reliability of the battery device 100, helps to extend the service life of the battery device, reduces safety hazards caused by fastener failure, and further improves the adaptability and stability of the battery device in various complex environments, giving the battery device 100 a high level of safety performance.

[0060] Figure 9 This is a schematic diagram of the installation of the first plate, the housing, and the fasteners provided for some embodiments of this application.

[0061] In some possible embodiments, see Figures 1 to 9 As shown, the battery device 100 includes a battery cell 121 and a housing 110 with a receiving space; the battery cell 121 is received in the receiving space of the housing 110; the first plate 113 is a bottom protective plate, and the first plate 113 is fixedly connected to the bottom plate 110a of the housing 110 by fasteners 30.

[0062] Specifically, the fastener 30 is a bolt; the fastener 30 passes through the first plate 113 and the base plate 110a, and is tightened onto the other end of the fastener 30 that extends from the base plate 110a by means of a spring washer 411 and a nut 412, ensuring that the first plate 113 is fixedly connected to the base plate 110a of the housing 110 by means of the fastener 30. At the same time, by setting the mounting hole 114 and the circumferential limit of the fastener 30, the stability and anti-detachment ability of the fastener 30 after installation can be significantly enhanced, avoiding problems such as easy rotation and easy detachment, thereby greatly improving the structural strength and connection reliability of the battery device 100, helping to extend the service life of the battery device, reducing safety hazards caused by fastener failure, and further improving the adaptability and stability of the battery device in various complex environments, so that the battery device 100 has high safety performance.

[0063] Understandably, when the bottom protective plate is installed on a structure requiring protection, such as at the bottom of the battery housing 110, the bottom protective plate is connected to the bottom plate 110a of the housing 110 along its thickness direction. Thus, when the battery housing 110 is subjected to external impact, the bottom protective plate can provide effective protection.

[0064] The four edges of the first plate 113 can correspond to and be sealed with the bottom plate 110a of the box 110. The connection can be made by bolts, combined with welding, riveting and gluing.

[0065] Optionally, the first plate 113 can typically be a square plate or a round plate to facilitate manufacturing. The first plate 113 can be formed by stamping sheet metal parts and can be used to support the heat exchange plate (not shown) and the battery cell 121, and provide corresponding protection to prevent external gravel or other parts from impacting the battery cell 121.

[0066] Optionally, the fastener 30 is made of carbon steel or stainless steel, possessing good structural strength and service life. If the fastener 30 is made of carbon steel, its surface can be provided with an anti-corrosion layer, specifically a zinc-nickel alloy plating layer formed by electroplating, extending the service life of the fastener 30. If the fastener 30 is made of stainless steel, its entire structure can be passivated, thereby extending the service life of the fastener 30. This further improves the adaptability and stability of the battery device in various complex environments, resulting in a longer service life and higher safety performance for the battery device 100.

[0067] In some other embodiments, the first plate 113 can also be other component brackets, such as electrical box brackets, busbar brackets, etc.; the first plate 113 and the plate of the housing 110 are connected by fasteners 30, and the connection structure is generally similar to that of the previous embodiment, and will not be described again here.

[0068] In some possible embodiments, see Figures 5 to 9 As shown, at least one through groove 115 is also provided on the first plate 113, and each through groove 115 is formed by the radial recess of the hole wall of the mounting hole 114; the fastener 30 includes at least one boss 33, which can pass through the through groove 115 along the thickness direction Z of the first plate 113.

[0069] By setting the boss 33, it can pass through the through groove 115 along the thickness direction Z of the first plate 113, which can ensure that the fastener 30 can be smoothly inserted into the mounting hole 114 and connected to other parts of the battery device 100.

[0070] Projecting along the thickness direction Z of the first plate 113, the projected area of ​​the slot 115 should be greater than the projected area of ​​the boss 33.

[0071] In some possible embodiments, refer to Figures 5 to 9 As shown, the fastener 30 includes an integrally connected column 31 and a nut 32; a boss 33 is disposed on the peripheral side of the column 31; and the nut 32 is disposed at one end of the column 31 and axially limited at the mounting hole 114.

[0072] Fastener 30 can be a screw and is fastened in conjunction with a nut. Nut 32 and nut respectively abut against the sides of the first plate 113 and other parts of the battery device 100 along the axial direction, thereby achieving a stable connection between the two.

[0073] In some embodiments, the boss 33 is disposed on the peripheral side of the column 31, and the boss 33 and the column 31 can be integrally formed by cold heading and milling. In other embodiments, the boss 33 and the column 31 can be machined separately and then connected as a whole by welding.

[0074] In some possible embodiments, see Figures 5 to 9 As shown, the first plate 113 includes a limiting step 116, which protrudes radially from the inner wall of the mounting hole 114. Each through groove 115 is circumferentially spaced on the limiting step 116. The boss 33 passes through the through groove 115 and can rotate to the bottom of the limiting step 116 under the action of external force to be axially limited with the limiting step 116.

[0075] The limiting step 116 can be circular.

[0076] The boss 33 passes through the slot 115, so that the limiting step 116 is located in the area between the boss 33 and the nut 32; the column 31 can rotate a certain angle clockwise or counterclockwise around its own axis, so that the boss 33 rotates from below the slot 115 to below other areas of the bottom of the limiting step 116, thereby enabling the boss 33 to provide axial limiting of the limiting step 116 along the thickness direction Z of the first plate 113; on the one hand, it can prevent the first plate 113 from loosening from the fastener 30 along the thickness direction Z, and on the other hand, the boss 33 can provide axial limiting of the limiting step 116 along the thickness direction Z of the first plate 113. The friction between the boss 33 and the limiting step 116 can effectively ensure the circumferential relative position of the boss 33 and the limiting step 116, thereby enabling the circumferential limiting of the mounting hole 114 and the fastener 30. This significantly enhances the stability and anti-detachment ability of the fastener 30 after installation, avoiding problems such as easy rotation and easy detachment. This greatly improves the structural strength and connection reliability of the battery device 100, helps extend the service life of the battery device, reduces safety hazards caused by fastener failure, and makes the battery device 100 have high safety performance.

[0077] In some possible embodiments, see Figures 5 to 9 As shown, the thickness of the limiting step 116 is A, the distance from the boss 33 to the nut 32 is B, and 0mm < AB is satisfied.

[0078] That is to say, along the thickness direction Z of the first plate 113, the distance from the top surface 117 of the limiting step 116 to the bottom surface 118 of the limiting step 116 is A. By ensuring that the thickness A of the limiting step 116 is greater than the distance B from the boss 33 to the nut 32, an interference fit between the two is achieved. Then, the friction force between the boss 33 and the limiting step 116 can be used to achieve the circumferential relative position of the two, thereby achieving the circumferential limiting of the mounting hole 114 and the fastener 30.

[0079] In some possible embodiments, see Figures 5 to 9 As shown, a guide slope 332 is formed on the top edge of the boss 33 facing the nut 32. This facilitates the rotation of the boss 33 from below the through groove 115 to below other areas of the limiting step 116.

[0080] In some embodiments, the thickness A of the limiting step 116 and the distance B from the boss 33 to the nut 32 satisfy 0mm < AB ≤ 0.2mm. This ensures that there is a certain interference fit between the limiting step 116 and the boss 33 to generate sufficient friction for circumferential positioning, while also preventing excessive interference fit from causing difficulty in rotating the column 31. Specifically, the difference between the thickness A of the limiting step 116 and the distance B from the boss 33 to the nut 32 can be 0.05mm, 0.1mm, 0.12mm, 0.18mm, and 0.2mm, depending on the design.

[0081] In some possible embodiments, see Figures 5 to 9 As shown, along the thickness direction Z of the first plate 113, the limiting step 116 is recessed inward on the bottom surface 118 away from the nut 32 to form at least one positioning groove 119, and the boss 33 is fitted with the positioning groove 119.

[0082] The boss 33 passes through the slot 115, so that the limiting step 116 is located in the area between the boss 33 and the nut 32. By providing a positioning groove 119 on the bottom surface 118 of the limiting step 116 away from the nut 32, the column 31 rotates clockwise or counterclockwise around its own axis by a certain angle, so that the boss 33 rotates from below the slot 115 into the positioning groove 119 of the limiting step 116, thereby achieving positioning; thus, the boss 33 can provide a limiting position for the limiting step 116 along the thickness direction Z of the first plate 113, preventing the first plate 113 from becoming loose from the fastener 30 along the thickness direction Z; in addition, since the positioning groove 119 is provided for positioning with the boss 33, another In terms of positioning, the friction between the positioning groove 119 and the boss 33, as well as the groove wall, can better ensure the relative position of the boss 33 and the positioning groove 119, thereby achieving circumferential positioning of the mounting hole 114 and the fastener 30. This can significantly enhance the stability and anti-detachment ability of the fastener 30 after installation, avoid problems such as easy rotation and easy detachment, and greatly improve the structural strength and connection reliability of the battery device 100. This helps to extend the service life of the battery device, reduce safety hazards caused by fastener failure, and make the battery device 100 have high safety performance.

[0083] In some possible embodiments, see Figures 5 to 9 As shown, there are multiple through slots 115 and multiple positioning slots 119. All through slots 115 and positioning slots 119 are alternately distributed on the limiting step 116 along the circumferential direction of the mounting hole 114; there are multiple bosses 33. All bosses 33 are distributed on the circumferential side of the column 31 along the circumferential direction.

[0084] Multiple through slots 115 are distributed circumferentially on one side of the inner ring of the limiting step 116; multiple positioning slots 119 are distributed circumferentially on the bottom surface 118 of the limiting step 116 away from the nut 32; and the through slots 115 and positioning slots 119 are alternately spaced on the limiting step 116.

[0085] Multiple bosses 33 are distributed circumferentially on the circumferential side of the column 31, and the multiple bosses 33, multiple positioning grooves 119 and multiple through grooves 115 correspond one-to-one.

[0086] In this configuration, the through slots 115 and positioning slots 119 are alternately spaced on the limiting step 116. Each boss 33 on the fastener 30 passes through its corresponding through slot 115 and reaches one side of the bottom surface 118 of the limiting step 116. The column 31 can rotate a certain angle clockwise or counterclockwise around its own axis so that the boss 33 can rotate from below the through slot 115 and transfer to the positioning slot 119 located next to the through slot 115 to achieve positioning.

[0087] Multiple bosses 33 and multiple positioning grooves 119 are positioned in the circumferential direction, so that the limiting step 116 and the column 31 are subjected to more uniform force in the circumferential direction, effectively preventing them from being misaligned and stuck.

[0088] The boss 33 can pass through the corresponding through slot 115 along the thickness direction Z of the first plate 113, ensuring that the fastener 30 can be smoothly inserted into the mounting hole 114 and connected to other parts of the battery device 100.

[0089] Optionally, the number of through slots 115 can be one, two, three, four or more, and the corresponding number of bosses 33 can be one, two, three, four or more; the corresponding number of positioning slots 119 can be one, two, three, four or more; the specific number is subject to the design.

[0090] In some possible embodiments, see Figures 5 to 9 As shown, the bottom end 331 of the boss 33, which is away from the limiting step 116, is located inside the mounting hole 114.

[0091] The top surface 117 of the limiting step 116 is flush with the upper surface of the first plate 113; the distance from the bottom surface 118 of the limiting step 116 to the bottom of the mounting hole 114 is greater than the thickness of the boss 33.

[0092] Thus, the boss 33 can be accommodated through the mounting hole 114, preventing the boss 33 from protruding from the lower surface of the first plate 113, thereby preventing the boss 33 from crushing other parts in the battery device 100, such as preventing the bottom plate 110a of the housing from being crushed.

[0093] In some possible embodiments, see Figures 5 to 9 As shown, the column 31 includes a smooth section 311 and a threaded section 312 integrally connected. A nut 32 is disposed at the end of the smooth section 311 away from the threaded section 312, and a boss 33 is disposed on the peripheral side of the smooth section 311.

[0094] The threaded section 312 may be provided with threads for connecting the nut 412; the boss 33 is provided on the circumferential side of the smooth section 311; and passes through the through groove 115 along the thickness direction Z of the first plate 113. The column 31 can rotate a certain angle clockwise or counterclockwise around its own axis so that the boss 33 rotates from below the through groove 115 to below other areas of the limiting step 116, thereby enabling the boss 33 to limit the limiting step 116 along the thickness direction Z of the first plate 113. On the one hand, it can prevent the first plate 113 from loosening from the fastener 30 along the thickness direction Z. On the other hand, the friction between the boss 33 and the limiting step 116 can better ensure the circumferential relative position of the boss 33 and the limiting step 116, thereby realizing the circumferential limitation of the mounting hole 114 and the fastener 30. The threaded section 312 passes through the first plate 113 and the base plate 110a in sequence, and exits from the side of the base plate 110a away from the first plate 113. The protruding part of the threaded section 312 can be tightened by the spring washer 411 and the nut 412. In this way, the fastener 30 and the nut 412 are used to achieve fastening. The nut 32 and the nut 412 abut against the two sides of the first plate 113 and the base plate 110a respectively, thereby achieving a stable connection between the two.

[0095] A second aspect of this application provides an electrical device including the aforementioned battery device 100; the battery device 100 is used to provide electrical energy to the electrical device.

[0096] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, The battery device includes: A first plate (113) having a mounting hole (114); at least one through groove (115) is also provided on the first plate (113), each of the through grooves (115) being formed by a radial recess in the hole wall of the mounting hole (114); And a fastener (30) having at least one boss (33) that can pass through the through slot (115) along the thickness direction (Z) of the first plate (113); the fastener (30) passing through a mounting hole (114) of the first plate (113) and the mounting hole (114) being circumferentially limited by the fastener (30).

2. The battery device according to claim 1, characterized in that, The fastener (30) includes an integrally connected column (31) and a nut (32); the boss (33) is disposed on the peripheral side of the column (31); the nut (32) is disposed at one end of the column (31) and axially limited at the mounting hole (114).

3. The battery device according to claim 2, characterized in that, The first plate (113) includes a limiting step (116), which protrudes radially from the inner wall of the mounting hole (114), wherein each of the through slots (115) is circumferentially spaced on the limiting step (116). The boss (33) passes through the slot (115) and can rotate to the bottom of the limiting step (116) under the action of external force to be axially limited with the limiting step (116).

4. The battery device according to claim 3, characterized in that, Along the thickness direction (Z) of the first plate (113), the limiting step (116) is recessed inward on the bottom surface (118) of the nut (32) to form at least one positioning groove (119), and the boss (33) is fitted with the positioning groove (119).

5. The battery device according to claim 3, characterized in that, The thickness of the limiting step (116) is A, the distance from the boss (33) to the nut (32) is B, and 0mm < AB ≤ 0.2mm is satisfied.

6. The battery device according to claim 4, characterized in that, There are multiple through slots (115) and multiple positioning slots (119). All the through slots (115) and the positioning slots (119) are alternately distributed on the limiting step (116) along the circumference of the mounting hole (114). The number of protrusions (33) is multiple, and all the protrusions (33) are distributed circumferentially on the circumferential side surface of the column (31).

7. The battery device according to claim 2, characterized in that, The column (31) includes an integrally connected smooth section (311) and a threaded section (312), the nut (32) is disposed at one end of the smooth section (311) away from the threaded section (312), and the boss (33) is disposed on the peripheral side of the smooth section (311).

8. The battery device according to claim 3, characterized in that, The boss (33) has a guide slope (332) formed on the top edge facing the nut (32).

9. The battery device according to any one of claims 1 to 8, characterized in that, The battery device includes a battery cell (121) and a housing (110) with a receiving space. The battery cell (121) is housed in the housing space of the casing (110); The first plate (113) is a bottom protective plate, and the first plate (113) is fixedly connected to the bottom plate of the box (110) by the fastener (30).

10. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 9.

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