Bolt, battery device and electric equipment

Abstract

The utility model discloses a bolt, battery device and electric equipment, and relates to the battery technical field, the battery device comprises a battery box body, a battery monomer arranged in the battery box body, a bottom protection plate and a bolt, the battery box body comprises a bottom plate, the bottom protection plate is arranged at the bottom of the bottom plate, a nut is embedded in the bottom plate, and the bottom protection plate is provided with a connecting hole; the bolt is configured to be connected with the bottom plate and the bottom protection plate, the bolt comprises a flange part and a rod part which are connected, the rod part comprises a first connecting section and a second connecting section which are connected, the first connecting section penetrates through the connecting hole, the second connecting section is inserted into the nut, and the diameter of the first connecting section is smaller than that of the second connecting section. According to the technical scheme provided by the utility model, the problem that the sealing performance of the battery is influenced during bottom scraping can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a bolt, a battery device and electrical equipment. Background Art

[0002] Batteries are an important source of power for electric vehicles. Since batteries are located relatively low in electric vehicles, electric vehicles are constantly experiencing safety accidents caused by scratches on the bottom of the batteries, making the bottom protection of batteries more and more important.

[0003] In the related art, a bottom guard plate is used to protect the bottom of the battery. The bottom guard plate is connected to the bottom of the battery case by bolts. Specifically, an opening is set at the bottom of the battery case, and a nut is installed in the opening. The bolt is passed through the bottom guard plate and then inserted into the nut of the battery case. However, in actual application, the impact force of scraping the bottom will be transmitted to the nut through the bolt, and the impact force of scraping the bottom may far exceed the design threshold, causing the nut to loosen and affect the sealing of the battery case. Utility Model Content

[0004] In view of the above problems, the present application provides a bolt, a battery device and an electrical device, aiming to solve the problem of affecting the sealing of the battery when scraping the bottom.

[0005] The present application provides a battery device, including a battery box, a battery cell arranged in the battery box, a bottom guard plate and a bolt, the battery box including a bottom plate, the bottom guard plate is arranged at the bottom of the bottom plate, the bottom plate is embedded with a nut, and the bottom guard plate is provided with a connecting hole; the bolt is configured to connect the bottom plate and the bottom guard plate, the bolt includes a flange portion and a rod portion connected to each other, the rod portion includes a first connecting section and a second connecting section connected to each other, the first connecting section is passed through the connecting hole, the second connecting section is inserted into the nut, and the diameter of the first connecting section is smaller than the diameter of the second connecting section.

[0006] In the technical solution of the embodiment of the present application, the technical solution of the utility model adopts bolts to connect the bottom plate and the bottom guard plate of the battery box, and the bolts include a first connecting section and a second connecting section with different diameters. During assembly, the first connecting section is inserted into the connecting hole, and the second connecting section is inserted into the nut of the bottom plate; since the diameter of the first connecting section is smaller than the diameter of the second connecting section, the position of the first connecting section is relatively weak and prone to breakage. Then, when the bottom guard plate encounters a bottom scrape, the impact force of the bottom scrape will first be transmitted to the first connecting section of the bolt. When the impact force of the bottom scrape exceeds the design threshold, the position of the first connecting section will first break. Therefore, the impact force of the bottom scrape exceeding the design threshold will not be transmitted to the nut through the bolt, and will not cause the nut to loosen and affect the sealing of the battery box, thereby effectively solving the problem of affecting the sealing of the battery when scraping the bottom.

[0007] In some embodiments, the first connection section is provided with a thinning structure. With such a design, when the bottom guard plate encounters a bottom scrape, the impact force of the bottom scrape will first be transmitted to the first connection section of the bolt. Since the first connection section is provided with a thinning structure, the stress is concentrated at the thinning structure of the first connection section. Once the impact force of the bottom scrape exceeds the design threshold, it can be disconnected at the thinning structure of the first connection section, making the first connection section more prone to breakage, thereby more effectively preventing the impact force of the bottom scrape exceeding the design threshold from being transmitted to the nut through the bolt, and will not cause the nut to loosen and affect the sealing of the battery box.

[0008] In some embodiments, the outer peripheral wall of the first connecting section is provided with a notch, and the notch is a thinning structure. Such a design facilitates the formation of a thinning structure by directly providing a notch on the outer peripheral wall of the first connecting section, and the notch design can better enable the first connecting section to achieve effective connection between the bottom plate and the bottom guard plate of the battery box when there is no bottom scraping, and at the same time enable the first connecting section to quickly break at the notch when the impact force of the bottom scraping exceeds the design threshold.

[0009] In some embodiments, the notch is arranged around the circumference of the first connecting section. With this design, no matter in which direction the bottom guard plate encounters the scraping bottom, the scraping bottom impact force can be quickly transmitted to the notch of the first connecting section, so that when the scraping bottom impact force exceeds the design threshold, the notch can be quickly broken, further reducing the risk of the scraping bottom impact force exceeding the design threshold being transmitted to the nut, thereby further reducing the impact on the sealing of the battery box.

[0010] In other embodiments, the notch is a vertical notch extending along the axial direction of the first connecting section. With such a design, when the bottom guard plate encounters a bottom scrape, the bottom scrape impact force can also be quickly transmitted to the vertical notch of the first connecting section, so that when the bottom scrape impact force exceeds the design threshold, the vertical notch can be quickly broken, further reducing the risk of the bottom scrape impact force exceeding the design threshold being transmitted to the nut, thereby further reducing the impact on the sealing of the battery box.

[0011] In some embodiments, the outer peripheral wall of the first connecting section is provided with a first wall surface and a second wall surface connected at an angle, the connection point of the first wall surface and the second wall surface is arranged toward the center of the first connecting section, and the first wall surface and the second wall surface enclose a gap. Such a design can make the stress concentration position of the first connecting section at the connection point of the first wall surface and the second wall surface, so that the stress concentration position is closer to the center of the first connecting section, thereby making the first connecting section more prone to fracture, thereby more effectively preventing the impact force of the bottom scraping exceeding the design threshold from being transmitted to the nut through the bolt.

[0012] In some embodiments, the battery device further comprises a bushing, which is arranged in the connection hole; the first connection section is passed through the bushing. In such a design, the bushing can play a role in shockproofing, so as to improve the connection reliability of the bolt.

[0013] In some embodiments, a clamping edge is provided on the inner side of the bushing, and the clamping edge is configured to position the bolt. With such a design, when the bolt is installed into the bushing, the clamping edge on the bushing can be used to position the bolt so that the first connecting section of the bolt is positioned in the bushing, thereby preventing the first connecting section from coming out of the bushing and affecting the connection between the battery box and the bottom guard plate.

[0014] In some embodiments, the clamping edge is arranged opposite to the thinning structure. With such a design, when the bottom guard plate encounters a bottom scraper, the bushing is first subjected to force, and when the impact force of the bottom scraper exceeds the design threshold, the bushing will fall off the bottom guard plate, and at the same time, the clamping edge on the bushing will cut off the first connecting section from the position of the thinning structure, making the first connecting section more likely to break, thereby more effectively preventing the impact force of the bottom scraper exceeding the design threshold from being transmitted to the nut through the bolt, and will not cause the nut to loosen and affect the sealing of the battery box.

[0015] In some embodiments, the bottom plate has a bottom plate front side, the bottom guard plate has a guard plate front side opposite to the bottom plate front side, a nut is embedded in the bottom plate front side, and a connecting hole is provided on the guard plate front side; the bolts are configured to connect the bottom plate front side and the guard plate front side. In such a design, since the electrical equipment will usually only scrape the guard plate front side of the bottom guard plate during use, the bolts of this solution are used to connect the bottom plate front side and the guard plate front side. When the bottom is scraped and the impact force of the scraping exceeds the design threshold, the first connecting section of the bolt can be broken. Therefore, the impact force of the scraping exceeding the design threshold will not be transmitted to the nut through the bolt, and will not cause the nut to loosen and affect the sealing of the battery box; and the other positions of the bottom plate and the bottom guard plate of the battery box can be connected with ordinary bolts, which can effectively improve the connection effect between the battery box and the bottom guard plate.

[0016] In some embodiments, the nut is a pull rivet nut. Compared with a traditional nut, such a design makes the installation process of the pull rivet nut easier and has better sealing performance.

[0017] The present application also provides a bolt, which is configured to connect a base plate and a bottom guard plate, the bolt includes a flange portion and a rod portion connected to each other, the rod portion includes a first connecting section and a second connecting section connected to each other, the first connecting section is passed through a connecting hole of the bottom guard plate, the second connecting section is inserted into a nut on the base plate, and the diameter of the first connecting section is smaller than the diameter of the second connecting section.

[0018] The present application also provides an electrical device, comprising the above-mentioned battery device.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a schematic structural diagram of an embodiment of a battery device of the present application;

[0022] Figure 2 This is a front view of an embodiment of a battery device of the present application;

[0023] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0024] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0025] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0026] Figure 6 A partial enlarged view of another embodiment of the battery device of the present application;

[0027] Figure 7 An exploded view of an embodiment of a battery device of the present application;

[0028] Figure 8 This is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0029] Description of Figure Numbers:

[0030]

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0037] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] The battery device mentioned in this field is also called a battery. It can be divided into disposable batteries and rechargeable batteries according to whether it is rechargeable. The common types of rechargeable batteries are: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have larger output and charging current, and also have a longer service life, but the cost is higher.

[0040] The battery described in the embodiments of the present application refers to a rechargeable battery. The embodiments disclosed in the present application will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0041] The battery mentioned in the embodiments disclosed in this application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. Battery cells are the basic units in the battery, and can generally be divided into: cylindrical battery cells, rectangular battery cells and soft-pack battery cells according to the packaging method. The following will mainly focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or soft-pack battery cells in some aspects.

[0042] A battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte and a separator. Lithium-ion battery cells mainly rely on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. In cylindrical battery cells, the film structure of three layers of material is wound into a cylindrical electrode assembly, while in rectangular battery cells, the film structure is wound or stacked into an electrode assembly with a roughly rectangular shape.

[0043] In a common battery cell structure, the battery cell includes a shell, an electrode assembly and an electrolyte. The electrode assembly is contained in the shell of the battery cell, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The shell includes a shell and an end cap. The shell includes a housing formed by a plurality of walls and an opening. The end cap is arranged at the opening to close the housing chamber. In addition to the electrode assembly, the housing chamber also contains an electrolyte. The positive electrode sheet and the negative electrode sheet in the electrode assembly include tabs. In order to avoid passing a large current without melting, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together. The tabs are electrically connected to the electrode terminals located outside the battery cell through connecting members, and the electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a rectangular battery cell, the electrode terminal is generally arranged at the end cap portion. A plurality of battery cells are connected in series and / or in parallel via the electrode terminals for application in various applications.

[0044] In some high-power applications such as electric vehicles, the application of batteries includes three levels: battery cells, battery modules and batteries. The battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery refers to the final state of the battery system installed in the electric vehicle. The battery generally includes a battery box for encapsulating one or more battery cells.

[0045] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a battery box and multiple battery cells contained in the battery box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety. At present, the mechanical safety of power batteries during use is one of the battery safety issues that consumers generally care about.

[0046] The battery provided in the embodiment of the present application can be a power source for electric devices. The electric devices can be mobile phones, portable devices, laptop computers, battery cars, electric cars, ships, spacecraft, electric toys and electric tools, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0047] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0048] For example, Figure 8 This is a structural diagram of an embodiment of a vehicle 1000 of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 100, a controller 200 and a motor 300 may be provided inside the vehicle 1000. The controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand during the start, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0049] For example, see Figure 7 , Figure 7 An exploded view of the structure of a battery device 100 provided for some embodiments of the present application. The battery device 100 includes a battery case 10 and a battery cell 20, and the battery case 10 has a storage space for accommodating the battery cell 20. Among them, the battery case 10 can adopt a variety of structures. In some embodiments, the battery case 10 may include a first part 10a and a second part 10b, the first part 10a and the second part 10b cover each other, and the first part 10a and the second part 10b jointly define a storage space for accommodating the battery cell 20. The second part 10b may be a hollow structure with one end open, the first part 10a may be a plate-like structure, and the first part 10a covers the open side of the second part 10b, so that the first part 10a and the second part 10b jointly define a storage space; the first part 10a and the second part 10b may also be hollow structures with one side open, and the open side of the first part 10a covers the open side of the second part 10b. Of course, the battery box 11 formed by the first part 10a and the second part 10b can be in various shapes, such as a cylinder, a cuboid, etc.

[0050] In the battery device 100, there can be one or more battery cells 20. When the battery device 100 has multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the battery box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the battery box 10.

[0051] Batteries are an important source of power for electric vehicles. Since batteries are located relatively low in electric vehicles, electric vehicles are constantly experiencing safety accidents caused by scratches on the bottom of the batteries, making the bottom protection of batteries more and more important.

[0052] In the related art, a bottom guard plate is used to protect the bottom of the battery. The bottom guard plate is connected to the bottom of the battery case by bolts. Specifically, an opening is set at the bottom of the battery case, and a nut is installed in the opening. The bolt is passed through the bottom guard plate and then inserted into the nut of the battery case. However, in actual application, the impact force of scraping the bottom will be transmitted to the nut through the bolt, and the impact force of scraping the bottom may far exceed the design threshold, causing the nut to loosen and affect the sealing of the battery case.

[0053] Based on the above problems, the present invention proposes a battery device 100, which aims to solve the problem of affecting the sealing of the battery when scraping the bottom. The device is described in detail below with reference to specific drawings and embodiments.

[0054] See also Figures 1 to 5 In one embodiment of the utility model, the battery device 100 includes a battery box 10, a battery cell 20 arranged in the battery box 10, a bottom guard plate 30 and a bolt 40. The battery box 10 includes a bottom plate 1, the bottom guard plate 30 is arranged at the bottom of the bottom plate 1, the bottom plate 1 is embedded with a nut 11, and the bottom guard plate 30 is provided with a connecting hole 31; the bolt 40 is configured to connect the bottom plate 1 and the bottom guard plate 30, the bolt 40 includes a flange portion 421 and a rod portion 422 connected to each other, the rod portion 422 includes a first connecting section 4221 and a second connecting section 4222 connected to each other, the first connecting section 4221 is penetrated through the connecting hole 31, the second connecting section 4222 is inserted into the nut 11, and the diameter of the first connecting section 4221 is smaller than the diameter of the second connecting section 4222.

[0055] The bottom guard plate 30 is specifically a plate-shaped structure. Optionally, the bottom guard plate 30 may be a circular plate-shaped structure, a polygonal plate-shaped structure, or other irregular plate-shaped structures. Exemplarily, the structural shape of the bottom guard plate 30 matches the structural shape of the bottom plate 1 of the battery box 10. When the battery box 10 is a square or substantially angular box structure, the projection of the bottom plate 1 of the battery box 10 in its height direction is a rectangle, and the projection of the bottom guard plate 30 in its height direction is also a rectangle.

[0056] When bolts 40 are used to connect the bottom plate 1 and the bottom guard plate 30 of the battery box 10, the bolts 40 are first riveted to the connecting hole 31 of the bottom guard plate 30, wherein the first connecting section 4221 of the bolt 40 is passed through the connecting hole 31 of the bottom guard plate 30, and the flange portion 421 of the bolt 40 abuts against the bottom surface of the bottom guard plate 30 away from the battery box 10 to position the bolt 40, and the second connecting section 4222 of the bolt 40 extends out from the top surface of the bottom guard plate 30 toward the battery box 10, and then the bottom guard plate 30 is placed on the bottom of the bottom plate 1, and the second connecting section 4222 of the bolt 40 is locked in the nut 11 of the bottom plate 1, and the bolt 40 can be used to achieve the connection between the bottom plate 1 and the bottom guard plate 30.

[0057] In actual application, the diameter of the first connecting segment 4221 can be half of the diameter of the second connecting segment 4222, or it can be 1 / 4, 3 / 4, 4 / 5, etc. of the diameter of the second connecting segment 4222, as long as the first connecting segment 4221 can achieve effective connection between the bottom plate 1 and the bottom guard plate 30 when there is no bottom scraping, and at the same time the first connecting segment 4221 can break when the impact force of the bottom scraping exceeds the design threshold, no specific limitation is made here.

[0058] In the technical solution of the embodiment of the present application, the technical solution of the utility model adopts a bolt 40 to connect the bottom plate 1 and the bottom guard plate 30 of the battery box 10, and the bolt 40 includes a first connecting section 4221 and a second connecting section 4222 with different diameters. During assembly, the first connecting section 4221 is inserted into the connecting hole 31, and the second connecting section 4222 is inserted into the nut 11 of the bottom plate 1; since the diameter of the first connecting section 4221 is smaller than the diameter of the second connecting section 4222, the position of the first connecting section 4221 is relatively weak and easy to break, then when the bottom guard plate 30 encounters a bottom scraping, the impact force of the bottom scraping will first be transmitted to the first connecting section 4221 of the bolt 40, and when the impact force of the bottom scraping exceeds the design threshold, the position of the first connecting section 4221 will be broken first, so the impact force of the bottom scraping exceeding the design threshold will not be transmitted to the nut 11 through the bolt 40, and will not cause the nut 11 to loosen and affect the sealing of the battery box 10, thereby effectively solving the problem of affecting the sealing of the battery when scraping the bottom.

[0059] It should be noted that when the impact force of scraping the bottom exceeds the design threshold, the first connecting section 4221 will break first, leaving the second connecting section 4222 in the nut 11. In subsequent maintenance, the second connecting section 4222 remaining in the nut 11 can be removed using tooling, and the base plate 1 and the bottom guard plate 30 can be reconnected by replacing the new bolts 40.

[0060] In addition, after the first connecting section 4221 of the bolt 40 is broken, maintenance only requires replacing the bottom guard plate 30 without replacing the entire battery device 100, which greatly reduces waste.

[0061] See also Figure 4 , Figure 5 In one embodiment of the present invention, the first connecting section 4221 is provided with a thinning structure 42a.

[0062] It should be noted that the thinning structure 42a can be a solid structure arranged on the first connecting section 4221, such as foam, plastic, etc. that is more likely to break; or, the thinning structure 42a can also be a virtual structure on the first connecting section 4221, such as a groove, a mouth, a seam, etc.

[0063] With such a design, when the bottom guard plate 30 encounters a bottom scrape, the impact force of the bottom scrape will first be transmitted to the first connecting section 4221 of the bolt 40. Since the first connecting section 4221 is provided with a thinning structure 42a, the stress is concentrated at the thinning structure 42a of the first connecting section 4221. Once the impact force of the bottom scrape exceeds the design threshold, the first connecting section 4221 will be disconnected at the thinning structure 42a, thereby making the first connecting section 4221 more prone to breakage, thereby more effectively preventing the impact force of the bottom scrape exceeding the design threshold from being transmitted to the nut 11 through the bolt 40, and will not cause the nut 11 to loosen and affect the sealing of the battery box 10.

[0064] See also Figure 5 In one embodiment of the present invention, a notch is provided on the outer peripheral wall of the first connecting section 4221, and the notch is a thinning structure 42a.

[0065] Such a design, by directly setting a notch on the outer wall of the first connecting section 4221, so that the notch can form a thinning structure 42a, thereby facilitating the formation of the thinning structure 42a, and the design of the notch can better enable the first connecting section 4221 to achieve effective connection between the battery box 10 and the bottom guard plate 30 when there is no bottom scraping, and at the same time enable the first connecting section 4221 to quickly break at the notch when the impact force of the bottom scraping exceeds the design threshold.

[0066] In practical application, the notch may be provided in only one section of the outer peripheral wall of the first connecting section 4221 , or may be provided in an opening surrounding the outer peripheral wall of the first connecting section 4221 .

[0067] See also Figure 5 In one embodiment of the present invention, the notch is arranged around the circumference of the first connecting section 4221 .

[0068] With this design, no matter in which direction the bottom guard plate 30 encounters the scraping bottom, the scraping bottom impact force can be quickly transmitted to the notch of the first connecting section 4221, so that when the scraping bottom impact force exceeds the design threshold, it can quickly break at the notch, further reducing the risk of the scraping bottom impact force exceeding the design threshold being transmitted to the nut 11, thereby further reducing the impact on the sealing of the battery box 10.

[0069] See also Figure 6 In another embodiment of the present invention, the notch is a vertical notch extending along the axial direction of the first connecting section 4221 .

[0070] With this design, when the bottom guard plate 30 encounters bottom scraping, the impact force of the bottom scraping can also be quickly transmitted to the vertical notches of the first connecting section 4221, so that when the impact force of the bottom scraping exceeds the design threshold, the vertical notches can be quickly broken, further reducing the risk of the bottom scraping impact force exceeding the design threshold being transmitted to the nut 11, thereby further reducing the impact on the sealing of the battery box 10.

[0071] In practical applications, the cross-sectional shape of the notch may be V-shaped, U-shaped, or the like.

[0072] See also Figure 5 In one embodiment of the utility model, the outer peripheral wall of the first connecting section 4221 is provided with a first wall surface 42a1 and a second wall surface 42a2 connected at an angle, and the connection between the first wall surface 42a1 and the second wall surface 42a2 is arranged toward the center of the first connecting section 4221, and the first wall surface 42a1 and the second wall surface 42a2 enclose a gap.

[0073] In this embodiment, the cross-sectional shape of the notch formed by the first wall surface 42 a 1 and the second wall surface 42 a 2 is a V-shaped opening with its opening facing away from the center of the first connecting section 4221 .

[0074] Such a design can make the stress concentration position of the first connecting section 4221 at the connection between the first wall 42a1 and the second wall 42a2, so that the stress concentration position is closer to the center of the first connecting section 4221, thereby making the first connecting section 4221 more prone to breakage, thereby more effectively avoiding the impact force of scraping the bottom exceeding the design threshold from being transmitted to the nut 11 through the bolt 40.

[0075] See also Figure 5In one embodiment of the present invention, the battery device 100 further includes a bushing 41, which is disposed in the connection hole 31; the first connection section 4221 is passed through the bushing 41. With such a design, the bushing 41 can play a role in shockproofing, so as to improve the connection reliability of the bolt 40.

[0076] In this embodiment, the bushing 41 and the bolt 40 are first riveted together at the connecting hole 31 of the bottom guard plate 30, wherein the first connecting section 4221 of the bolt 40 is passed through the bushing 41, and the flange portion 421 of the bolt 40 abuts against the bottom surface of the bottom guard plate 30 away from the battery box 10 to position the bolt 40.

[0077] See also Figure 5 In one embodiment of the present invention, a clamping edge 411 is provided on the inner side of the bushing 41 , and the clamping edge 411 is configured to position the bolt 40 .

[0078] In this embodiment, the diameter of the first connecting section 4221 is smaller than the diameter of the second connecting section 4222, so a step is formed on the side where the second connecting section 4222 is connected to the first connecting section 4221, and the clamping edge 411 is arranged on the inner side of the bushing 41. When the bolt 40 tends to fall out, the clamping edge 411 can be used to abut the step of the second connecting section 4222 to position the bolt 40.

[0079] With such a design, when the bolt 40 is installed into the bushing 41, the bolt 40 can be positioned by the clamping edge 411 on the bushing 41, so that the first connecting section 4221 of the bolt 40 is positioned in the bushing 41 to prevent the first connecting section 4221 from escaping from the bushing 41 and affecting the connection between the battery box 10 and the bottom guard plate 30.

[0080] See also Figure 5 In one embodiment of the present invention, the clamping edge 411 is disposed opposite to the thinning structure 42a.

[0081] The card edge 411 is arranged opposite to the thinning structure 42a. It can be understood that the card edge 411 can be completely opposite to the thinning structure 42a, that is, in the radial direction of the first connecting section 4221, the projection of the thinning structure 42a on the inner side of the bushing 41 completely falls into the projection of the card edge 411 on the inner side of the bushing 41; of course, the card edge 411 can also be partially opposite to the thinning structure 42a, that is, in the radial direction of the first connecting section 4221, the projection of the thinning structure 42a on the inner side of the bushing 41 partially falls into the projection of the card edge 411 on the inner side of the bushing 41.

[0082] With such a design, when the bottom guard plate 30 encounters a bottom scrape, the bushing 41 is first subjected to force. When the impact force of the bottom scrape exceeds the design threshold, the bushing 41 will fall off the bottom guard plate 30. At the same time, the clamping edge 411 on the bushing 41 will cut off the first connecting section 4221 from the position of the thinning structure 42a, thereby making the first connecting section 4221 more prone to breakage, thereby more effectively preventing the impact force of the bottom scrape exceeding the design threshold from being transmitted to the nut 11 through the bolt 40, and will not cause the nut 11 to loosen and affect the sealing of the battery box 10.

[0083] See also Figure 1 In one embodiment of the utility model, the base plate 1 has a base plate front side 12, the bottom guard plate 30 has a guard plate front side 32 opposite to the base plate front side 12, the base plate front side 12 is embedded with a nut 11, and the guard plate front side 32 is provided with a connecting hole 31; the bolt 40 is configured to connect the base plate front side 12 and the guard plate front side 32.

[0084] In this embodiment, the bottom plate front side 12 refers to the side of the bottom plate 1 close to the front of the electric vehicle. Similarly, the guard plate front side 32 refers to the side of the bottom guard plate 30 close to the front of the electric vehicle.

[0085] Such a design, since electric vehicles usually only scrape the front side 32 of the bottom guard plate 30 during use, the bolt 40 of the present invention is used to connect the front side 12 of the bottom plate and the front side 32 of the guard plate. When the bottom is scraped and the impact force of the scraping exceeds the design threshold, the first connecting section 4221 of the bolt 40 can be broken. Therefore, the impact force of the scraping exceeding the design threshold will not be transmitted to the nut 11 through the bolt 40, and will not cause the nut 11 to loosen and affect the sealing of the battery box 10; and the other positions of the battery box 10 and the bottom guard plate 30 can be connected with ordinary bolts, which can effectively improve the connection effect between the battery box 10 and the bottom guard plate 30.

[0086] See also Figure 4 In one embodiment of the present invention, the nut 11 is a pull rivet nut. Compared with the traditional nut, the installation process of the pull rivet nut 11 is simpler and the sealing performance is better.

[0087] See also Figures 1 to 5 The utility model also proposes a bolt 40, which is configured to connect the bottom plate 1 and the bottom guard plate 30. The bolt 40 includes a flange portion 421 and a rod portion 422 connected to each other. The rod portion 422 includes a first connecting segment 4221 and a second connecting segment 4222 connected to each other. The first connecting segment 4221 is inserted into the connecting hole 31 of the bottom guard plate 30, and the second connecting segment 4222 is inserted into the nut 11 on the battery box 10. The diameter of the first connecting segment 4221 is smaller than the diameter of the second connecting segment 4222.

[0088] According to some embodiments of the present application, the present application provides a battery device 100 including a bolt 40, see Figures 1 to 5 The battery device 100 also includes a battery box 10, a battery cell 20 arranged in the battery box 10, a bottom guard plate 30, and a bushing 41. The battery box 10 includes a bottom plate 1, the bottom guard plate 30 is arranged at the bottom of the bottom plate 1, the bottom plate 1 is embedded with a nut 11, and the bottom guard plate 30 is provided with a connecting hole 31; the bolt 40 is configured to connect the bottom plate 1 and the bottom guard plate 30, the bushing 41 is arranged in the connecting hole 31, the bolt 40 includes a flange portion 421 and a rod portion 422 connected to each other, the rod portion 422 includes a first connecting section 4221 and a second connecting section 4222 connected to each other, the first connecting section 4221 is passed through the bushing 41, and the second connecting section 4 222 is inserted into the nut 11, and the diameter of the first connecting section 4221 is smaller than the diameter of the second connecting section 4222; the outer peripheral wall of the first connecting section 4221 is provided with a notch, and the notch forms a thinning structure 42a; the inner side of the bushing 41 is provided with a clamping edge 411, and the clamping edge 411 is configured to position the bolt 40, and the clamping edge 411 is arranged opposite to the thinning structure 42a; the base plate 1 has a base plate front side 12, and the bottom guard plate 30 has a guard plate front side 32 opposite to the base plate front side 12, the base plate front side 12 is embedded with a nut 11, and the guard plate front side 32 is provided with a connecting hole 31; the bolt 40 is configured to connect the base plate front side 12 and the guard plate front side 32.

[0089] In the technical solution of the embodiment of the present application, the technical solution of the utility model adopts a bolt 40 to connect the bottom plate 1 and the bottom guard plate 30, and the bolt 40 includes a first connecting section 4221 and a second connecting section 4222 of different diameters. During assembly, the bushing 41 is installed at the connecting hole 31 of the bottom guard plate 30, and the first connecting section 4221 is inserted on the bushing 41, and the second connecting section 4222 is inserted into the nut 11 of the bottom plate 1; since the diameter of the first connecting section 4221 is smaller than the diameter of the second connecting section 4222, and the outer peripheral wall of the first connecting section 4221 is provided with a notch that can form a thinning structure 42a, the stress is concentrated at the notch of the first connecting section 4221. When the bottom guard plate 30 encounters a bottom scraper, the bushing 41 is first subjected to the stress. Force, when the impact force of scraping the bottom exceeds the design threshold, the bushing 41 will fall off the bottom guard plate 30, and at the same time, the clamping edge 411 on the bushing 41 will cut off the first connecting section 4221 from the position of the notch, making the first connecting section 4221 more prone to breakage, thereby more effectively preventing the impact force of scraping the bottom exceeding the design threshold from being transmitted to the nut 11 through the bolt 40, and will not cause the nut 11 to loosen and affect the sealing of the battery box 10, thereby effectively solving the problem of affecting the sealing of the battery when scraping the bottom. In addition, since electric vehicles usually only scrape the front side 32 of the bottom guard plate 30 during use, the bolt 40 of the present solution is used to connect the front side 12 of the bottom plate and the front side 32 of the guard plate. When the bottom is scraped and the impact force of the scraping exceeds the design threshold, the first connecting section 4221 of the bolt 40 can be broken. Therefore, the impact force of the scraping exceeding the design threshold will not be transmitted to the nut 11 through the bolt 40, and will not cause the nut 11 to loosen and affect the sealing of the battery box 10; and other positions of the bottom plate 1 and the bottom guard plate 30 can be connected with ordinary bolts, which can effectively improve the connection effect between the bottom plate 1 and the bottom guard plate 30.

[0090] The utility model also proposes an electrical device, which includes a battery device 100. The specific structure of the battery device 100 refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0091] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery device, characterized in that: The battery box comprises a battery box, a battery cell arranged in the battery box, a bottom guard plate and bolts, wherein the battery box comprises a bottom plate, the bottom guard plate is arranged at the bottom of the bottom plate, a nut is embedded in the bottom plate, and the bottom guard plate is provided with a connecting hole; The bolt is configured to connect the bottom plate and the bottom guard plate, and the bolt includes: The flange part and the rod part are connected, and the rod part includes a first connecting section and a second connecting section connected to each other, the first connecting section is passed through the connecting hole, and the second connecting section is inserted into the nut, and the diameter of the first connecting section is smaller than the diameter of the second connecting section.

2. The battery device according to claim 1, characterized in that: The first connecting section is provided with a thinning structure.

3. The battery device according to claim 2, characterized in that: The outer peripheral wall of the first connecting section is provided with a notch, and the notch is the thinning structure.

4. The battery device according to claim 3, characterized in that: The notch is arranged around the circumference of the first connecting section; Alternatively, the notch is a vertical notch extending along the axial direction of the first connecting section.

5. The battery device according to claim 3, characterized in that: The outer peripheral wall of the first connecting section is provided with a first wall surface and a second wall surface connected at an angle, the connection between the first wall surface and the second wall surface is arranged toward the center of the first connecting section, and the first wall surface and the second wall surface enclose the gap.

6. The battery device according to any one of claims 1 to 5, characterized in that: The battery device further comprises a bushing, wherein the bushing is arranged in the connecting hole, and the first connecting section passes through the bushing.

7. The battery device according to claim 6, characterized in that: A clamping edge is provided on the inner side of the bushing, and the clamping edge is configured to position the bolt.

8. The battery device according to claim 7, characterized in that: The clamping edge is arranged opposite to the thinning structure.

9. The battery device according to any one of claims 1 to 5, characterized in that: The bottom plate has a bottom plate front side, the bottom guard plate has a guard plate front side opposite to the bottom plate front side, the bottom plate front side is embedded with the nut, and the guard plate front side is provided with the connecting hole; The bolt is configured to connect the base plate front side and the guard plate front side.

10. The battery device according to any one of claims 1 to 5, characterized in that: The nut is a pull rivet nut.

11. A bolt, characterized in that: The bolt is configured to connect the bottom plate and the bottom guard plate, and the bolt includes: It includes a flange portion and a rod portion connected to each other, the rod portion includes a first connecting section and a second connecting section connected to each other, the first connecting section is passed through a connecting hole of the bottom guard plate, the second connecting section is inserted into a nut on the bottom plate, and the diameter of the first connecting section is smaller than the diameter of the second connecting section.

12. An electrical device, characterized in that: A battery device comprising the battery device as claimed in any one of claims 1 to 10.

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