Battery and electric device

Abstract

The utility model discloses a battery and an electric device. The battery comprises a plurality of battery cells and a battery box. The battery box is used for containing a plurality of battery monomers and comprises a box body and a reinforcing plate, a first through hole is formed in one of the box body and the reinforcing plate, a second through hole is formed in the other one of the box body and the reinforcing plate, the first through hole corresponds to the second through hole in position, a plurality of clamping arms arranged at intervals in the circumferential direction are arranged on the first through hole, and the clamping arms correspond to the first through hole in position. The clamping arm extends into the second through hole from the first through hole and is attached to the hole wall of the second through hole. And based on the action of friction force between the clamping arms and the hole walls of the second through holes, reliable connection of the reinforcing plate and the box body can be realized, the structural stability after connection is guaranteed, and the structural stability of the battery is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of batteries, in particular to a battery and a power consumption device. BACKGROUND

[0002] Batteries are widely used in the field of new energy, and electric vehicles have become a new trend in the development of the automobile industry. As the power source of electric vehicles, batteries are the core components of electric vehicles.

[0003] The structural stability of the battery directly affects the working stability of the battery, and how to improve the structural stability of the battery is a problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a battery and a power consumption device to improve the structural stability of the battery.

[0005] The first aspect of the present application provides a battery, comprising a plurality of battery monomers and a battery box. The battery box is used to accommodate the plurality of battery monomers, and the battery box comprises a box body and a reinforcing plate, one of the box body and the reinforcing plate is provided with a first through hole, the other of the box body and the reinforcing plate is provided with a second through hole, the first through hole and the second through hole are positionally corresponding, the first through hole is provided with a plurality of clamping arms which are arranged at intervals in the circumferential direction, and the clamping arms extend from the first through hole into the second through hole and are fitted with the hole wall of the second through hole.

[0006] Based on the frictional force between the clamping arms and the hole wall of the second through hole, the reinforcing plate and the box body can be reliably connected, the structural stability after connection is guaranteed, and the structural stability of the battery is improved. Moreover, the reinforcing plate and the box body are also convenient for subsequent electrophoretic coating, so that the electrophoretic paint can fully penetrate between the reinforcing plate and the box body, and the probability of rusting at the connection between the reinforcing plate and the box body is reduced.

[0007] In some embodiments, the second through hole is provided with a sawtooth structure, the sawtooth structure is distributed in the circumferential direction of the hole wall of the second through hole, and the sawtooth structure is fitted with the clamping arm.

[0008] The sawtooth structure can tightly fit the clamping arm after the clamping arm is bent, thereby increasing the frictional force between the clamping arm and the second through hole, and more stably connecting the reinforcing plate and the box body together.

[0009] In some embodiments, the sawtooth structure comprises a plurality of interval arranged tooth grooves, and a part of the plurality of clamping arms is clamped into the plurality of tooth grooves.

[0010] A part of the clamping arm is embedded in the tooth groove, thereby further increasing the frictional force between the clamping arm and the second through hole.

[0011] In some embodiments, the plurality of clamping arms are uniformly distributed around the axis of the first through hole.

[0012] In this way, the friction between the plurality of clamping arms and the hole wall of the second through hole is uniformly distributed in the circumferential direction, rather than being relatively concentrated in a certain area in the circumferential direction, so that the connection between the reinforcing plate and the box body is more stable and reliable.

[0013] In some embodiments, the clamping arm comprises a first section and a second section arranged in a bent manner, the first end of the first section is connected with the hole wall of the first through hole, the second section is connected with the second end of the first section, and the second section extends into the second through hole in the axial direction of the first through hole.

[0014] In this way, the space occupied by the clamping arm in the first through hole and the second through hole can be reduced, which is beneficial to the subsequent arrangement of the connecting member for connecting the reinforcing plate and the box body. In addition, the contact area of the second section can be increased, so that the second section can be in close contact with the hole wall in the entire extension direction, the friction is increased, and the connection stability between the reinforcing plate and the box body is improved.

[0015] In some embodiments, the second through hole is coaxially arranged with the first through hole.

[0016] In this way, when the clamping arm is bent, the clamping arm can smoothly enter the second through hole from the first through hole, and the clamping arm can be closely attached to the hole wall of the second through hole, so that the gap between the clamping arm and the second through hole is reduced, the friction is increased, and the connection stability between the reinforcing plate and the box body is improved.

[0017] In some embodiments, the first through hole and the plurality of clamping arms are integrally formed.

[0018] In this way, the structural strength of the connection between the clamping arm and the first through hole can be improved, and cracking or breaking of the connection between the clamping arm and the first through hole can be reduced when the clamping arm is bent.

[0019] In some embodiments, in the axial direction of the second through hole, the clamping arm closely attaches to the entire hole wall of the second through hole.

[0020] This has the advantage that the contact area between the clamping arm and the hole wall can be sufficiently increased in a limited space, thereby increasing the friction and improving the connection stability between the reinforcing plate and the box body.

[0021] In some embodiments, a connecting member is further arranged in the first through hole and the second through hole to connect the reinforcing plate and the box body.

[0022] The connecting member not only can connect the reinforcing plate and the box body to improve the connection stability, but also can fill the area in the first through hole and the second through hole that is not filled by the plurality of clamping arms, so that the connecting member can press the clamping arm to closely attach to the hole wall, and the risk that the connecting member is easily detached from the first through hole and the second through hole due to the arrangement of the adhesive on the attachment surface of the reinforcing plate and the box body can be reduced.

[0023] In some embodiments, the box comprises a box body and a cover body, the box body has a containing cavity, the cover body is used for covering the box body to close the containing cavity, and the reinforcing plate is arranged on the cover body.

[0024] The box is arranged in a split structure, which can improve the assembly convenience of the battery. The box body is a structure for containing a plurality of battery monomers, and has a high requirement for the structural strength of the box body. Therefore, the box body is not convenient to be locally thinned, and the thinning area can be arranged on the cover body, so that the box can be lightweight. The reinforcing plate arranged in the thinning area of the cover body can guarantee the structural strength of the cover body, thereby improving the structural stability and reliability of the box.

[0025] In some embodiments, the cover body comprises a cover body and a mounting edge arranged at the edge of the cover body, the mounting edge is used for connecting with the box body, the reinforcing plate is arranged in the mounting edge, the first through hole is arranged on the mounting edge, and the second through hole is arranged on the reinforcing plate.

[0026] The mounting edge is a site for connecting with the box body. If the cover body is not thinned, the structural strength of the cover body can be improved, thereby enhancing the protection of the cover body on the battery monomers in the containing cavity. If the mounting edge is thinned, the lightweight design of the cover body can be met. If the reinforcing plate is arranged at the thinning position, the structural strength of the mounting edge can be improved, and the stability and reliability of the mounting edge after connecting with the box body can be guaranteed.

[0027] In some embodiments, a plurality of first through holes are arranged at intervals on the mounting edge, a plurality of second through holes are arranged at intervals on the reinforcing plate, and the plurality of first through holes and the plurality of second through holes correspond respectively.

[0028] By increasing the number of the first through holes and the second through holes, the friction between the clamping arm and the hole wall can be increased, thereby further improving the connection stability of the reinforcing plate and the mounting edge.

[0029] In some embodiments, a sealing member is further included, and the sealing member is clamped between the cover body and the box body. The sealing member can improve the sealing performance of the first through hole and the second through hole.

[0030] The second aspect of the present application provides a power utilization device comprising the battery as described above, and the battery is used for power supply.

[0031] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below only some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained on the drawings without creative labor.

[0033] Figure 1 is a structural schematic diagram of a vehicle of some embodiments of the present application.

[0034] Figure 2 is a structural schematic diagram of a battery device of some embodiments of the present application.

[0035] Figure 3 is a structural schematic diagram of a box in a battery of some embodiments of the present application.

[0036] Figure 4 is a structural schematic diagram of a box body, a cover body and a reinforcing plate connected of some embodiments of the present application.

[0037] Figure 5 is a structural schematic diagram of a cover body provided with a first through hole of some embodiments of the present application.

[0038] Figure 6 is a top view of Figure 5 .

[0039] Figure 7 is a structural schematic diagram of a reinforcing plate of some embodiments of the present application.

[0040] Figure 8 is a structural schematic diagram of a clamping arm bent into a second through hole of some embodiments of the present application.

[0041] Figure 9 is a top view of Figure 8 .

[0042] Figure 10 is a partial enlarged view of Figure 8 .

[0043] Figure 11 is a top view of a clamping arm in an extending state in a second through hole after being bent.

[0044] Figure 12 is a schematic diagram of a clamping arm bent by a punch of some embodiments of the present application.

[0045] Figure 13 is a structural schematic diagram of a reinforcing plate provided with a sawtooth structure and a mounting edge stacked and before a clamping arm is bent of some embodiments of the present application.

[0046] Figure 14 is a top view of Figure 13 .

[0047] Figure 15 is a structural diagram of a reinforcing plate provided with a sawtooth structure according to some embodiments of the present application.

[0048] Figure 16 is a structural sectional view of a reinforcing plate provided with a sawtooth structure according to some embodiments of the present application.

[0049] Figure 17 is a partial enlarged view of Figure 13

[0050] Figure 18 is an assembly diagram of a reinforcing plate provided with a first through hole and a cover according to some embodiments of the present application.

[0051] Figure 19 is a structural diagram of a connecting member connecting a cover, a reinforcing plate and a box body according to some embodiments of the present application.

[0052] The reference signs are as follows: 100, battery; 10, battery module; 20, battery box; 20a, lower box body; 20b, upper box body; 200, vehicle; 21, box body; 211, box body; 212, cover; 2121, cover body; 2122, mounting edge; 22, reinforcing plate; 31, first through hole; 32, second through hole; 33, clamping arm; 34, sawtooth structure; 40, connecting member; 50, sealing member; 60, punch. DETAILED DESCRIPTION

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the description and claims of this application as well as the above abstract are intended to cover any and all adaptations or variations of well known methods, articles, materials, compositions, and

[0054] In the description of 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 embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0055] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification indicates that, where appropriate, the phrase can be referring to a particular feature, structure, or characteristic that is included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily referring to the same embodiment or to a particular embodiment that is independent of or alternative to other embodiments. It will be explicitly understood by those of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.​

[0056] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0057] In the description of the embodiments of the present application, the term "a plurality of" means two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of pieces" means two or more pieces (including two pieces).

[0058] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0061] The applicant has found that, in view of the light weight of the battery as a whole, some areas on the battery box are usually designed to be thinner, resulting in weaker local strength at these positions, or the local strength of some specific areas of the battery box is weak, and a reinforcing plate needs to be arranged at the position with weaker local strength to ensure the local structural strength by bonding the reinforcing plate to the surface of the box. In the related art, the reinforcing plate is usually connected to the battery box by spot welding, and after the two are connected by spot welding, electrophoretic coating treatment is performed, which results in that the electrophoretic paint cannot penetrate the spot welding connection between the reinforcing plate and the box, and after long-term use, rust is prone to occur between the reinforcing plate and the battery box; some solutions also glue the surface of the box and the surface of the reinforcing plate to make the reinforcing plate and the battery box glued together, and then the reinforcing plate and the battery box are connected together by using a bolt made of metal material, and after the bolt made of non-metal material (glue layer) is tightened, stress creep is prone to occur at the interface of the bolt, and then the residual torque of the bolt decreases when the battery vibrates, and there is a risk of bolt loosening, which is not conducive to the structural stability and sealing of the battery.

[0062] Therefore, an embodiment of the present application provides a battery, which includes a battery box and a plurality of battery monomers. The battery box includes a box body and a reinforcing plate. The box body and the reinforcing plate are respectively provided with a first through hole and a second through hole, and the first through hole is provided with a clamping arm which is bent from the first through hole and extends into the second through hole and is bonded to the hole wall of the second through hole. In this way, the connection reliability of the reinforcing plate and the box body is achieved, and the structural stability of the battery is improved.

[0063] An embodiment of the present application also provides a power consumption device including the above-mentioned battery. The power consumption device can be a mobile device such as a vehicle, a ship, a small airplane, etc. Taking the vehicle as an example, the vehicle of the embodiment of the present application can be a new energy vehicle. The new energy vehicle can be a pure electric vehicle, or a hybrid vehicle or a range extended vehicle.

[0064] For convenience of description, a power consumption device of an embodiment of the present application is taken as a vehicle for example. Referring to Figure 1 , Figure 1 A vehicle 200 using a battery 100 as a power source is shown. The battery 100 is arranged in the vehicle 200. The vehicle 200 is provided with a drive motor, which is electrically connected to the battery 100, and the battery 100 provides electric energy for the drive motor, and the drive motor is connected to the wheels through a transmission mechanism to drive the vehicle to travel. Specifically, the battery 100 can be arranged horizontally at the bottom of the vehicle 200.

[0065] The battery 100 of the embodiment of the present application includes at least one battery module 10. Specifically, in the embodiment, as shown in Figure 2As shown, the battery 100 of the embodiment includes the battery module 10 and the battery case 20 for accommodating the battery module 10. The battery case 20 has an accommodation cavity, and the battery module 10 is arranged in the accommodation cavity. In Figure 2 In the embodiment shown, the battery case 20 includes the lower case 20a and the upper case 20b which are mutually coverable. The upper case 20b and the lower case 20a jointly define an accommodation space for accommodating the battery module 10. Of course, in some other embodiments, the battery 100 can also include a case cover which is coverable on the lower case 20a, and the case cover can be, for example, a plate-shaped structure. Of course, the shape of the battery case 20 can be various shapes, such as a cuboid, a cylinder, etc.

[0066] The battery module 10 includes a plurality of battery cells. The plurality of battery cells can be in series, in parallel, or in a mixed connection, and the mixed connection means that the plurality of battery cells have both series connection and parallel connection. The plurality of battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole of the plurality of battery cells is accommodated in the battery case. Each battery cell can be a secondary battery or a primary battery, and can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell can be in the shape of a cuboid, a cylinder, a prism, or other shapes.

[0067] Referring to Figure 3 and 4 , some embodiments of the present application provide a battery 100 including a battery case 20 and a plurality of battery cells. The battery case is used to accommodate the plurality of battery cells, and the battery case 20 includes a case body 21 and a reinforcing plate 22. One of the case body 21 and the reinforcing plate 22 is provided with a first through hole 31, and the other of the case body 21 and the reinforcing plate 22 is provided with a second through hole 32. The first through hole 31 and the second through hole 32 are positionally corresponding. The first through hole 31 is provided with a plurality of clamping arms 33 which are spaced apart in a circumferential direction. The clamping arms 33 extend from the first through hole 31 into the second through hole 32 and are in abutment with the hole wall of the second through hole 32.

[0068] Specifically, as shown in Figure 6 and 17 , the clamping arm 33 is in the shape of a strip, and the clamping arm 33 has a first state and a second state. In the first state, the clamping arm 33 only extends in a radial direction within the first through hole 31 and does not extend into the second through hole 32. By applying an impact force to the clamping arm 33, for example, referring to Figure 12 , the plurality of clamping arms 33 are bent by means of a punch 60 and extend from the first through hole 31 into the second through hole 32, and after being bent, as shown in Figure 10 and 11As shown, the clamping arm 33 is in the second state, closely abutting the hole wall of the second through hole 32, and the pre-fixing of the reinforcing plate 22 and the box body 21 is achieved by means of the friction between the clamping arm 33 and the hole wall of the second through hole 32. Subsequently, the reinforcing plate 22 and the box body 21 can be fixedly connected by penetrating the first through hole 31 and the second through hole 32 with the connecting piece.

[0069] In summary, based on the friction between the clamping arm 33 and the hole wall of the second through hole 32, reliable connection of the reinforcing plate 22 and the box body 21 can be achieved, the structural stability after connection is ensured, and the structural stability of the battery is further improved. Moreover, it is also convenient for subsequent electrophoretic coating of the reinforcing plate 22 and the box body 21, so that the electrophoretic paint can fully penetrate between the reinforcing plate 22 and the box body 21, and the probability of rust at the connection between the reinforcing plate 22 and the box body 21 is reduced.

[0070] Reference Figure 13 、 15 , 16 and 17, in some embodiments, the second through hole 32 is provided with a sawtooth structure 34. The sawtooth structure 34 is distributed in the circumferential direction of the hole wall of the second through hole 32. The sawtooth structure 34 abuts the clamping arm 33.

[0071] Specifically, as shown in Figure 17 , the sawtooth structure 34 is continuously provided in the circumferential direction of the second through hole 32, the sawtooth structure 34 includes a plurality of teeth arranged at intervals, a tooth groove is formed between adjacent two teeth, and the profile of the tooth groove constitutes the hole wall of the second through hole 32. In other words, the teeth can be regarded as protruding structures protruding from the hole wall of the second through hole 32 to the center of the second through hole 32. These teeth can tightly abut the clamping arm 33 after the clamping arm 33 is bent, thereby increasing the friction between the clamping arm 33 and the second through hole 32, and more stably connecting the reinforcing plate 22 and the box body 21 together.

[0072] In other embodiments, the sawtooth structure 34 is discontinuously provided in the circumferential direction of the second through hole 32, that is, a plurality of sawtooth segments are arranged on the hole wall of the second through hole 32, and the plurality of sawtooth segments correspond to the positions of the plurality of clamping arms 33 in the circumferential direction. In this way, after the plurality of clamping arms 33 are bent, each clamping arm 33 can tightly abut the corresponding sawtooth segment, and the friction between the clamping arm 33 and the second through hole 32 can be increased, and the reinforcing plate 22 and the box body 21 can be more stably connected together.

[0073] In some embodiments, the sawtooth structure 34 includes a plurality of tooth grooves arranged at intervals. The plurality of clamping arms 33 are clamped into part of the plurality of tooth grooves.

[0074] Specifically, during the process of bending the clamping arms 33 by the punch 60, the clamping arms 33 are pressed by the tooth top and the punch 60 on both sides, causing the clamping arms 33 to deform to a certain extent, and a part of the clamping arms 33 is embedded in the tooth groove, thereby further increasing the friction between the clamping arms 33 and the second through hole 32.

[0075] In some embodiments, the sawtooth structure 34 is formed on the second through hole 32 by stamping or machining, for example, including forty to one hundred teeth, preferably forty teeth to enhance the friction with the clamping arms 33.

[0076] Reference Figure 5 and 6 In some embodiments, the plurality of clamping arms 33 are uniformly distributed around the axis of the first through hole 31. The friction between the plurality of clamping arms 33 and the hole wall of the second through hole 32 can also be uniformly distributed in the circumferential direction, rather than being relatively concentrated in a certain area in the circumferential direction, so that the connection between the reinforcing plate 22 and the box body 21 is more stable and reliable.

[0077] In some embodiments, the number of clamping arms 33 is between three and twelve, preferably eight to enhance the friction.

[0078] In some embodiments, the clamping arms 33 include a first section and a second section arranged by bending. The first end of the first section is connected to the hole wall of the first through hole 31. The second section is connected to the second end of the first section, and the second section extends into the second through hole 32 in the axial direction of the first through hole 31.

[0079] Specifically, the first section extends in the radial direction of the first through hole 31, the second section is perpendicular to the first section, and the second section extends along the hole wall of the first through hole 31 to the hole wall of the second through hole 32.

[0080] This can reduce the space occupied by the clamping arms 33 in the first through hole 31 and the second through hole 32, which is conducive to the subsequent arrangement of the connecting member to connect the reinforcing plate 22 and the box body 21. And this can increase the contact area of the second section, so that the second section can be in contact with the hole wall in the entire extension direction, increase the friction, thereby improving the connection stability of the reinforcing plate 22 and the box body 21.

[0081] In some embodiments, the second through hole 32 is coaxially arranged with the first through hole 31.

[0082] Specifically, reference Figure 9The first through hole 31 and the second through hole 32 are both substantially circular in outline, and the first through hole 31 and the second through hole 32 have the same hole diameter. On this basis, the first through hole 31 and the second through hole 32 are coaxially arranged, so that when the clamping arm 33 is bent by the punch 60, the clamping arm 33 can smoothly enter the second through hole 32 from the first through hole 31, and the clamping arm 33 can also be tightly fitted to the hole wall of the second through hole 32, reducing the gap between the clamping arm 33 and the second through hole 32, thereby increasing the friction and improving the connection stability of the reinforcing plate 22 and the box body 21.

[0083] In some embodiments, the first through hole 31 and the plurality of clamping arms 33 are integrally formed.

[0084] Specifically, when the first through hole 31 is arranged on the bottom plate of the box body 21, for example, the clamping arm 33 can be directly formed on the hole wall of the first through hole 31 based on die casting or 3D printing process when the bottom plate of the box body 21 is processed, which can improve the structural strength of the connection between the clamping arm 33 and the first through hole 31, and reduce cracking or breaking at the connection between the clamping arm 33 and the first through hole 31 when the clamping arm 33 is bent.

[0085] Reference Figure 8 In some embodiments, the clamping arm 33 is fitted to the entire hole wall of the second through hole 32 in the axial direction of the second through hole 32.

[0086] Specifically, when the first through hole 31 is arranged on the bottom plate of the box body 21, for example, the thickness of the bottom plate of the box body 21, the thickness of the reinforcing plate 22, and the length of the clamping arm 33 extending in the radial direction within the first through hole 31 are designed in association with each other, so that the clamping arm 33 can cover the entire hole wall of the second through hole 32 in the axial direction of the second through hole 32 without extending outside the second through hole 32 after being bent. This has the advantage of being able to sufficiently increase the contact area between the clamping arm 33 and the hole wall in a limited space, thereby increasing the friction and improving the connection stability of the reinforcing plate 22 and the box body 21.

[0087] Reference Figure 19 In some embodiments, the battery 100 further includes a connecting piece 40. The connecting piece 40 is arranged in the first through hole 31 and the second through hole 32 to connect the reinforcing plate 22 and the box body 21.

[0088] Specifically, after the clamping arms 33 are bent, the connecting piece 40 is inserted into the first through hole 31 and the second through hole 32, and the connecting piece 40 is located between the plurality of clamping arms 33 in the radial direction. The connecting piece 40 can not only connect the reinforcing plate 22 and the box body 21 to improve the connection stability, but also can fill the area in the first through hole 31 and the second through hole 32 that is not filled by the plurality of clamping arms 33. In this way, the connecting piece 40 can extrude the clamping arms 33 to some extent, so that the clamping arms 33 are firmly attached to the hole wall to increase the friction force, and the risk of the connecting piece being easily loosened from the first through hole 31 and the second through hole 32 due to the adhesive provided on the attachment surface of the reinforcing plate 22 and the box body 21 can be reduced.

[0089] In some embodiments, the connecting piece 40 includes a fixing bolt and a pull rivet stud. The box body 21 is provided with a mounting hole for fixing the pull rivet stud, the pull rivet stud is pre-inserted into the mounting hole, and the pull rivet stud has a mounting cavity extending in the axial direction thereof, the inner wall of the mounting cavity is provided with an internal thread, and the surface of the fixing bolt is provided with an external thread. By inserting the fixing bolt through the first through hole 31 and the second through hole 32 and screwing it into the mounting cavity of the pull rivet stud, the reinforcing plate 22 and the box body 21 can be reliably connected.

[0090] Reference Figure 3 , 4 and 8, in some embodiments, the box body 21 includes a box body 211 and a cover body 212. The box body 211 has a containing cavity. The cover body 212 is used to cover the box body 211 to close the containing cavity. The reinforcing plate 22 is provided on the cover body 212.

[0091] Specifically, the box body 21 is provided in a split structure, which can improve the assembly convenience of the battery 100. The box body 211 includes a bottom plate and a side plate provided around the edge of the bottom plate, and the bottom plate and the side plate enclose a containing cavity which is open on one side. The cover body 212 is used to cover the open end of the containing cavity to close the containing cavity. The box body 211 serves as a structure for containing a plurality of battery monomers, and therefore has a high requirement for the structural strength of the box body 211. Therefore, it is not convenient to locally thin the box body 211. The reinforcing plate 22 can be provided on the cover body 212, so that the box body 21 can be lightened. By providing the reinforcing plate 22 on the thinned area of the cover body 212, the structural strength of the cover body 212 can be guaranteed, and the structural stability and reliability of the box body 21 can be improved.

[0092] Reference Figure 5 and 8 In some embodiments, the cover body 212 includes a cover body 2121 and a mounting edge 2122 provided on the edge of the cover body 2121. The mounting edge 2122 is used to connect with the box body 211. The reinforcing plate 22 is attached to the mounting edge 2122. The first through hole 31 is provided on the mounting edge 2122. The second through hole 32 is provided on the reinforcing plate 22.

[0093] Specifically, the mounting edge 2122 is substantially a flat plate structure, which is used to lay on the top surface of the side plate of the box body 211, and the mounting edge 2122 is connected with the cover body 2121 in a smooth transition manner. The mounting edge 2122 is a position for connecting with the box body 211. If the cover body 2121 is not thinned, the structural strength of the cover body 2121 can be improved, thereby enhancing the protection of the battery monomer in the containing cavity by the cover body 2121. If the mounting edge 2122 is thinned, the lightweight design of the cover body 2121 can be met. Further, the structural strength of the mounting edge 2122 can be improved by arranging the reinforcing plate 22 at the thinned position, and the stability and reliability of the mounting edge 2122 after being connected with the box body 211 can be ensured.

[0094] Still referring to Figure 5 and 8 In some embodiments, a plurality of first through holes 31 are arranged on the mounting edge 2122 in a spaced manner. A plurality of second through holes 32 are arranged on the reinforcing plate 22 in a spaced manner. The plurality of first through holes 31 and the plurality of second through holes 32 correspond to each other, respectively.

[0095] Specifically, as shown in Figure 7 、 15 and 16, the reinforcing plate 22 is a rectangular plate structure, the plurality of second through holes 32 are arranged on the length direction of the reinforcing plate 22 in a spaced manner, and the plurality of first through holes 31 are arranged on the mounting edge 2122 in a corresponding manner with the plurality of second through holes 32. By increasing the number of the first through holes 31 and the second through holes 32, the friction between the clamping arm 33 and the hole wall can be increased, thereby further improving the connection stability of the reinforcing plate 22 and the mounting edge 2122.

[0096] In some embodiments, a plurality of thinned regions are arranged on the mounting edge 2122, and each thinned region is provided with a reinforcing plate 22, so that the weight of the cover body 212 can be lighter, and the plurality of reinforcing plates 22 can improve the structural strength of the plurality of thinned regions.

[0097] Referring to Figure 19 In some embodiments, the battery 100 further comprises a sealing member 50. The sealing member 50 is clamped between the cover body 212 and the box body 211.

[0098] Specifically, the position of the box body 211 for connecting with the cover body 212 is provided with a connecting hole, and the connecting member 40 (for example, a bolt) passes through the second through hole 32, the first through hole 31, the sealing member 50 and the connecting hole of the box body 211 in sequence. By means of the friction of the clamping arm 33 and the fastening connection of the connecting member 40, the reinforcing plate 22, the cover body 212, the sealing member 50 and the box body 211 are stably connected together. Based on this, the sealing member 50 can improve the sealing performance at the first through hole 31 and the second through hole 32.

[0099] In some embodiments, the seal 50 is, for example, a sealing ring.

[0100] refer to Figure 18 In other embodiments, a first through hole 31 is provided on the reinforcing plate 22 and a second through hole 32 is provided on the mounting edge 2122. By adopting this setting method, the beneficial effects of the connection of the above embodiments can also be achieved. Moreover, the structure of the reinforcing plate 22 is simpler than that of the cover 212. The clamping arm 33 is provided on the reinforcing plate 22, which can reduce the processing difficulty and manufacturing cost.

[0101] This application also provides an electrical device, including the battery 100 as described above, which is used to supply power.

[0102] The beneficial effects of the battery 100 in the various embodiments of this application are also applicable to electrical devices, and will not be repeated here.

[0103] The following is combined Figures 3 to 19 This application describes in detail the structure of a battery 100 according to a specific embodiment.

[0104] refer to Figure 2 The battery 100 includes a battery case 20 and multiple battery cells disposed within the battery case 20. (Reference) Figure 3 and 4 The battery box 20 includes a box body 21 and a reinforcing plate 22. The box body 21 includes a box body 211 and a cover 212. (See reference) Figure 5 The cover 212 includes a cover body 2121 and a mounting edge 2122. The reinforcing plate 22 is a sheet metal part.

[0105] The box body 211 includes a bottom plate and side plates arranged around the edge of the bottom plate. The bottom plate and side plates together form a single-sided open receiving cavity. A cover 212 is placed on the open end of the receiving cavity to close it. A mounting edge 2122 is provided on the edge of the cover body 2121 and is laid on the top surface of the side plate. (Reference) Figure 5 The mounting edge 2122 is basically a flat plate structure, and a first through hole 31 extending along the thickness direction is provided on the mounting edge 2122. (Reference) Figure 15 and 16The reinforcing plate 22 is in a rectangular plate shape, and a second through hole 32 is formed in the reinforcing plate 22 and extends through the thickness of the reinforcing plate 22. The first through hole 31 and the second through hole 32 are coaxially arranged and have the same size. Eight clamping arms 33 are arranged on the first through hole 31 and are integrally formed with the first through hole 31. The eight clamping arms 33 are evenly distributed around the axis of the first through hole 31. A sawtooth structure 34 is arranged on the second through hole 32 and is integrally formed with the second through hole 32. The sawtooth structure 34 extends around the hole wall of the second through hole 32, and the sawtooth structure 34 has forty teeth in total. The clamping arm 33 is in a strip shape, and the clamping arm 33 extends in the radial direction of the first through hole 31 before being bent. After being bent, the clamping arm 33 extends from the first through hole 31 into the second through hole 32, and the bent part of the clamping arm 33 is tightly fitted with the sawtooth structure 34.

[0106] Reference Figure 19 The battery 100 further comprises a sealing member 50 (specifically, a sealing ring), a pull-rivet stud, and a fixing bolt. The sealing member 50 is arranged on the top surface of the side plate of the box body 211 and is clamped between the box body 211 and the mounting edge 2122. The pull-rivet stud has a mounting cavity with an internal thread, and the surface of the fixing bolt is provided with an external thread. The top surface of the side plate of the box body 211 is provided with a connecting hole, the pull-rivet stud is sequentially arranged through the second through hole 32, the first through hole 31, the sealing ring, and the connecting hole, and the fixing bolt is screwed into the mounting cavity of the pull-rivet stud through the first through hole 31 and the second through hole 32. Thus, the reinforcing plate 22, the cover body 212, and the box body 211 are firmly connected together.

[0107] Before the cover body 212 is connected to the box body 211, the reinforcing plate 22 needs to be stacked on the mounting edge 2122, and the first through hole 31 and the second through hole 32 need to be aligned, as shown in FIGS. Figure 13 , 14 and 17. Then, the punch 60 is used to pass through the first through hole 31 and the second through hole 32, the clamping arm 33 is bent under the pushing action of the punch 60 and is tightly fitted with the sawtooth structure 34 on the hole wall of the second through hole 32, and the pre-fixing of the reinforcing plate 22 and the mounting edge 2122 is realized under the friction between the clamping arm 33 and the sawtooth structure 34. Then, the cover body 212 is arranged on the box body 211, and the pull-rivet stud and the fixing bolt are installed in the manner described above.

[0108] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the application without departing from the scope of the application, and equivalent components can be substituted for the components thereof. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: Multiple battery cells; and A battery box (20) is used to accommodate the plurality of battery cells. The battery box (20) includes a box body (21) and a reinforcing plate (22). One of the box body (21) and the reinforcing plate (22) is provided with a first through hole (31), and the other of the box body (21) and the reinforcing plate (22) is provided with a second through hole (32). The first through hole (31) and the second through hole (32) are positioned correspondingly. The first through hole (31) is provided with a plurality of locking arms (33) spaced apart in the circumferential direction. The locking arms (33) extend from the first through hole (31) into the second through hole (32) and fit against the hole wall of the second through hole (32).

2. The battery according to claim 1, characterized in that, The second through hole (32) is provided with a serrated structure (34), which is distributed in the circumferential direction of the hole wall of the second through hole (32) and is in contact with the clamping arm (33).

3. The battery according to claim 2, characterized in that, The serrated structure (34) includes a plurality of spaced-apart grooves, and the plurality of clamping arms (33) are engaged in portions of the plurality of grooves.

4. The battery according to claim 1, characterized in that, The multiple clamping arms (33) are evenly distributed around the axis of the first through hole (31).

5. The battery according to claim 1, characterized in that, The clamp arm (33) includes a first section and a second section with a bending configuration. The first end of the first section is connected to the wall of the first through hole (31), the second section is connected to the second end of the first section, and the second section extends into the second through hole (32) along the axial direction of the first through hole (31).

6. The battery according to claim 5, characterized in that, The second through hole (32) is coaxially arranged with the first through hole (31).

7. The battery according to claim 1, characterized in that, The first through hole (31) and the plurality of clamping arms (33) are integrally formed.

8. The battery according to claim 1, characterized in that, In the axial direction of the second through hole (32), the clamping arm (33) fits against the entire wall of the second through hole (32).

9. The battery according to any one of claims 1 to 8, characterized in that, It also includes a connector (40) disposed in the first through hole (31) and the second through hole (32) to connect the reinforcing plate (22) to the housing (21).

10. The battery according to claim 9, characterized in that, The box (21) includes a box body (211) and a cover (212). The box body (211) has a receiving cavity, and the cover (212) is used to cover the box body (211) to close the receiving cavity. The reinforcing plate (22) is disposed on the cover (212).

11. The battery according to claim 10, characterized in that, The cover (212) includes a cover body (2121) and a mounting edge (2122) disposed on the edge of the cover body (2121). The mounting edge (2122) is used to connect with the box body (211). The reinforcing plate (22) is attached to the mounting edge (2122). The first through hole (31) is disposed on the mounting edge (2122), and the second through hole (32) is disposed on the reinforcing plate (22).

12. The battery according to claim 11, characterized in that, Multiple first through holes (31) are spaced apart on the mounting edge (2122), and multiple second through holes (32) are spaced apart on the reinforcing plate (22). The multiple first through holes (31) and the multiple second through holes (32) correspond to each other respectively.

13. The battery according to claim 10, characterized in that, It also includes a sealing element (50) sandwiched between the cover (212) and the box body (211).

14. An electrical appliance, characterized in that, Includes a battery (100) as described in any one of claims 1 to 13, wherein the battery (100) is used for power supply.

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