Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The battery device comprises a battery box body and a riveting and locking assembly, the battery device comprises a first main body part and a second main body part; the first main body part and the second main body part are fixedly connected through the rivet pulling and locking assembly; the riveting and locking assembly comprises a bolt and a nut; the rivet pulling and locking assembly further comprises a sealing piece, the sealing piece is arranged between the outer side face of the bolt and the inner side face of the nut, the sealing piece seals the connecting face between the bolt and the nut, and the rivet pulling and locking assembly has certain sealing performance while achieving fixed connection of the first main body part and the second main body part. Therefore, the good sealing performance of the battery box body is maintained, and the performance of the battery device is improved.

Description

TECHNICAL FIELD

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

[0002] The battery device generally comprises a battery box and a battery cell. The battery box is used to provide a containing space for the battery cell, and the battery cell is contained in the battery box. In order to reduce the influence of water, oxygen and the like on the battery cell and other elements in the battery box, it is necessary to keep the battery box with a certain sealing performance. The sealing performance of the battery box in the related art needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a battery device and a power consumption device, so as to make the battery box have a better sealing effect and be beneficial to improving the performance of the battery device.

[0004] To solve the above technical problems, the first aspect of the present application provides a battery device, which comprises a battery box and a pull-rivet locking assembly; the battery device comprises a first main body part and a second main body part; the pull-rivet locking assembly fixedly connects the first main body part and the second main body part; the pull-rivet locking assembly comprises a bolt and a nut; wherein the pull-rivet locking assembly further comprises a sealing element, which is arranged between the outer side surface of the bolt and the inner side surface of the nut.

[0005] The sealing element is arranged between the outer side surface of the bolt and the inner side surface of the nut, and the sealing element seals the connecting surface between the bolt and the nut. That is to say, the pull-rivet locking assembly has a certain sealing performance while realizing the fixed connection of the first main body part and the second main body part, so as to keep the battery box with a better sealing performance and be beneficial to improving the performance of the battery device.

[0006] In an embodiment, the bolt comprises a first threaded segment and a first non-threaded segment, and the nut comprises a second threaded segment and a second non-threaded segment; wherein the sealing element comprises a first sealing element arranged between the outer side surface of the first non-threaded segment and the inner side surface of the second non-threaded segment; and / or the sealing element comprises a second sealing element arranged between the outer side surface of the first threaded segment and the inner side surface of the second threaded segment.

[0007] By arranging the sealing element in the above manner, the connecting surface between the bolt and the nut is sealed, the probability of water and oxygen outside the battery box entering the battery box from the connecting surface between the bolt and the nut is reduced, and the sealing performance of the battery device is kept better.

[0008] In an embodiment, the sealing element comprises a first sealing element arranged between the outer side surface of the first non-threaded segment and the inner side surface of the second non-threaded segment, the first sealing element is a sealing ring, and is sleeved on the outer side surface of the first non-threaded segment.

[0009] By setting the first sealing piece as a sealing ring, the first sealing piece is sleeved on the outer side surface of the first non-threaded segment, facilitating assembly of the first sealing piece, while sealing the entire circumference of the first non-threaded segment, achieving good sealing effect.

[0010] In an embodiment, the outer side surface of the first non-threaded segment has an annular limiting groove, and part of the sealing ring is embedded in the annular limiting groove.

[0011] By setting part of the sealing ring to be embedded in the annular limiting groove, the annular limiting groove limits the sealing ring, reducing the probability of displacement of the sealing ring, and maintaining the sealing of the connecting surface between the bolt and the nut.

[0012] In an embodiment, the sealing ring comprises an annular body and at least two annular ribs provided on the outer side surface of the annular body.

[0013] By providing at least two annular ribs on the outer side surface of the annular body, during the screwing process of the threaded connection between the bolt and the nut, the annular ribs are subjected to extrusion force, which in turn causes the annular body to be better compressed during the screwing process. The elastic deformation of the annular body will fill the small gap, thereby maintaining good sealing effect. In addition, by providing at least two annular ribs on the outer side surface of the annular body, the annular ribs can enhance the stiffness of the local area, reduce the non-recoverable deformation, and help maintain the flatness and stability of the sealing surface, thereby maintaining good sealing effect.

[0014] In an embodiment, the gap between the second non-threaded segment and the first non-threaded segment is in interference fit with the sealing ring.

[0015] Through the above arrangement, the sealing ring is tightly connected with the second non-threaded segment of the nut and the first non-threaded segment of the bolt, reducing the small gap between the sealing ring and the second non-threaded segment of the nut, and the small gap between the sealing ring and the first non-threaded segment of the bolt, effectively preventing water and oxygen outside the battery box from passing through, achieving good sealing effect. In addition, by setting the interference fit between the sealing ring and the gap between the second non-threaded segment and the first non-threaded segment, the pressure distribution on the sealing ring is more uniform, which helps to ensure that the sealing surface of the entire circumference of the sealing ring can effectively function.

[0016] In an embodiment, the sealing piece comprises a second sealing piece provided between the outer side surface of the first threaded segment and the inner side surface of the second threaded segment; the second sealing piece is sealing glue.

[0017] By setting the second sealing piece as sealing glue, the sealing glue is provided on the inner side surface of the second threaded segment or the outer side surface of the first threaded segment. The surface of the sealing glue fluctuates with the threads of the second threaded segment or the threads of the first threaded segment, maintaining the thread shape of the second threaded segment or the thread shape of the first threaded segment, achieving good sealing while maintaining the threaded connection between the bolt and the nut.

[0018] In an embodiment, the nut is a through-hole structure; or, the nut is a blind hole structure, and one end of the bolt is arranged in the blind hole of the nut.

[0019] By arranging the nut as a through-hole structure, the length of the bolt can be less than the length of the nut, or equal to or greater than the length of the nut, thereby expanding the length range of the bolt that is suitable for the nut. By arranging the nut as a blind hole structure, the debris generated during machining can be reduced from falling into the battery box from the nut; in combination with the first sealing member and / or the second sealing member, the connection between the bolt and the nut is sealed, which can reduce the rust at the bottom of the hole of the nut and maintain long-term sealing effectiveness.

[0020] In an embodiment, the first body part and the second body part include any two of the upper cover, the frame, the support beam, and the bottom guard plate.

[0021] By arranging the first body part and the second body part as described above, the rivet lock assembly can be used for fixed connection between any two structural members of the upper cover, the frame, the support beam, and the bottom guard plate, while having good sealing effect.

[0022] In an embodiment, the battery device further includes a third sealing member arranged between the first body part and the second body part and adjacent to the rivet lock assembly; and / or, the battery device further includes a fourth sealing member arranged at the connection between the nut and the first body part or at the connection between the nut and the second body part.

[0023] By the above arrangement, the water and oxygen outside the battery box are effectively prevented from entering the inside of the box through the gap between the nut and the first body part or the gap between the nut and the second body part, thereby achieving good sealing effect.

[0024] The second aspect of the present application provides a power-using device, which includes a device body and the battery device described in any one of the above embodiments, and the battery device is arranged in the device body. The power-using device has at least the same advantages as the battery device.

[0025] 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 following 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, features 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

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 is a structural schematic diagram of a battery device provided by the embodiments of the present application;

[0028] Figure 2 is Figure 1 is a top view structural schematic diagram of a second part of the battery device shown in

[0029] Figure 3 is Figure 2 is a sectional structural schematic diagram of the second part B region along the A-A line shown in

[0030] Figure 4 is a structural schematic diagram of a bolt embodiment provided by the embodiments of the present application;

[0031] Figure 5 is a structural schematic diagram of a first sealing member embodiment provided by the embodiments of the present application;

[0032] Figure 6 is Figure 3 is a fluid flow schematic diagram of the structure shown in

[0033] Figure 7 is Figure 3 is an enlarged structural schematic diagram of the N region shown in

[0034] Figure 8 is a disassembled structural schematic diagram of a battery monomer provided by the embodiments of the present application;

[0035] Figure 9 is a structural schematic diagram of a vehicle provided by the embodiments of the present application.

[0036] Label explanation:

[0037] Battery device 100, battery box 10, first part 11, second part 12, box 121, bottom guard plate 122, battery monomer 20, end cover 21, electrode terminal 21a, shell 22, battery core assembly 23, tab 23a, pull rivet lock attachment assembly 30, bolt 31, first threaded section 311, first non-threaded section 312, annular limiting groove 312a, nut 32, second threaded section 321, second non-threaded section 322, sealing member 33, first sealing member 331, annular body 3311, annular convex rib 3312, second sealing member 332, third sealing member 13, fourth sealing member 14, controller 200, motor 300, vehicle 1000. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and effects of the present application clearer and more apparent, the embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0039] 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 use of the terms "including," "comprising," "having" and "with" and any variations thereof herein are intended to cover both the inclusive and exclusive cases, unless otherwise expressly specified herein.

[0040] 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 term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces), unless otherwise explicitly specified.

[0041] 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 are not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments, to the exclusion of other embodiments. It is explicitly understood that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the 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 " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0043] Quantities, ratios, and other numerical values are presented herein in a range format. It is to be understood that such range format is used merely for the convenience of the reader and is not intended to limit the actual scope of such values to the particular values represented in such a range. It is therefore to be understood that any numerical value, range of values, and / or array of values expressly, implicitly, and inherently recited herein are replaced in their entirety by all a numerical values and ranges of values ostensibly falling within the same.

[0044] The battery device generally comprises a battery box and a battery cell. The battery box is used to provide a containing space for the battery cell, and the battery cell is contained in the battery box. The battery box generally comprises a box part, an upper cover and a bottom guard plate, and the upper cover and the bottom guard plate are arranged on the opposite sides of the box part respectively. The connection between the upper cover and the box part and / or the connection between the bottom guard plate and the box part generally adopts a pull nut, and the pull nut needs to have a certain sealing performance to maintain good sealing performance of the battery box.

[0045] In the related art, a sealing element is generally arranged between the nut and the hole wall of the battery box (the hole wall is used to assemble the nut). For the nut with a through hole structure, water and oxygen from the outside may enter the battery box from the gap between the bolt and the nut. For the nut with a blind hole structure, due to poor plating at the bottom of the hole, water and oxygen from the outside are easy to cause rust and even corrosion and rupture, which leads to the entry of water and oxygen from the outside into the battery box, resulting in sealing failure.

[0046] In view of this, the embodiments of the present application provide a battery device and an electric device to maintain good sealing performance of the battery box and facilitate improvement of the performance of the battery device.

[0047] Please refer to Figures 1 to 3 , Figure 1 is a structural schematic diagram of a battery device provided by the embodiments of the present application, Figure 2 is Figure 1 is a top view structural schematic diagram of a second part of the battery device shown in Figure 3 is Figure 2 is a sectional view structural schematic diagram of a B area of the second part along line A-A shown in

[0048] The battery device 100 comprises a battery box 10 and a battery cell 20; the battery box 10 is used to provide a containing space for the battery cell 20, and the battery cell 20 is contained in the battery box 10.

[0049] The battery box 10 can adopt various structures. In some embodiments, the battery box 10 can comprise a first part 11 and a second part 12, the first part 11 and the second part 12 are mutually covered, and the first part 11 and the second part 12 jointly define a containing space for containing the battery cell 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-shaped structure, the first part 11 is covered on the open side of the second part 12, so that the first part 11 and the second part 12 jointly define the containing space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 is covered on the open side of the second part 12. Of course, the battery box 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0050] It should be noted that the first part 11 of the battery box 10 can also be referred to as an upper cover, and the second part 12 of the battery box 10 includes a box 121 and a bottom guard plate 122 provided on the side of the box 121 away from the upper cover (as shown in Figure 3 The upper cover is connected between the box 121 and the bottom guard plate 122.

[0051] In the embodiment, the battery device 100 includes the battery box 10 and the pull-rivet fastening assembly 30; the battery device 100 includes a first main body part and a second main body part; the pull-rivet fastening assembly 30 fixedly connects the first main body part and the second main body part; the pull-rivet fastening assembly 30 includes a bolt 31 and a nut 32; and the pull-rivet fastening assembly 30 further includes a sealing member 33, which is arranged between the outer side surface of the bolt 31 and the inner side surface of the nut 32.

[0052] In an embodiment, the first main body part is the upper cover, and the second main body part is the box 121, and the upper cover and the box 121 are fixedly connected by the pull-rivet fastening assembly 30; in another embodiment, the first main body part is the box 121, and the second main body part is the bottom guard plate 122, and the box 121 and the bottom guard plate 122 are fixedly connected by the pull-rivet fastening assembly 30; in other embodiments, the first main body part and the second main body part can be any two structural members of the battery box 10 that need to be fixedly connected, and the first main body part and the second main body part are not limited to any two of the upper cover, the box 121, the bottom guard plate 122, the frame, and the support beam. Hereinafter, the first main body part is taken as the box 121, and the second main body part is taken as the bottom guard plate 122, and the structure of the first main body part, the second main body part, and the pull-rivet fastening assembly 30 and the positional relationship therebetween are described in detail, as shown in Figure 3

[0053] The pull-rivet fastening assembly 30 is used to connect and fix the first main body part and the second main body part. The nut 32 of the pull-rivet fastening assembly 30 is an internal-threaded fastener, the bolt 31 of the pull-rivet fastening assembly 30 is an external-threaded fastener, the external thread of the bolt 31 is arranged in cooperation with the internal thread of the nut 32; the nut 32 is arranged on the first main body part, the bolt 31 penetrates through the second main body part and is screwed with the nut 32, the nut 32 is pull-riveted, and the bolt 31 and the nut 32 are threadedly connected to realize the fixed connection between the first main body part and the second main body part.

[0054] ​The sealing member 33 is an element for preventing fluid (liquid or gas) from leaking or entering the inside of a structure, and is usually installed between two mating surfaces. In the embodiment, the sealing member 33 is arranged between the outer side surface of the bolt 31 and the inner side surface of the nut 32, and seals the connection surface between the bolt 31 and the nut 32. That is, the pull-rivet lock assembly 30 has a certain sealing performance while achieving the fixed connection of the first body part and the second body part, so as to maintain the better sealing performance of the battery box 10, and is conducive to improving the performance of the battery device 100.

[0055] In an embodiment, the bolt 31 includes a first threaded segment 311 and a first non-threaded segment 312, and the nut 32 includes a second threaded segment 321 and a second non-threaded segment 322; wherein the sealing member 33 includes a first sealing member 331 arranged between the outer side surface of the first non-threaded segment 312 and the inner side surface of the second non-threaded segment 322; and / or the sealing member 33 includes a second sealing member 332 arranged between the outer side surface of the first threaded segment 311 and the inner side surface of the second threaded segment 321.

[0056] The threaded part of the shank of the bolt 31 is defined as the first threaded segment 311, and the non-threaded part of the shank of the bolt 31 is defined as the first non-threaded segment 312. The threaded part of the inner side surface of the nut 32 is defined as the second threaded segment 321, and the non-threaded part of the inner side surface of the nut 32 is defined as the second non-threaded segment 322. In an embodiment, the first non-threaded segment 312 and the second non-threaded segment 322 are provided with the first sealing member 331 arranged between the outer side surface of the first non-threaded segment 312 and the inner side surface of the second non-threaded segment 322, so as to seal the connection surface between the bolt 31 and the nut 32 by the first sealing member 331. In an embodiment, the first threaded segment 311 and the second threaded segment 321 are provided with the second sealing member 332 arranged between the outer side surface of the first threaded segment 311 and the inner side surface of the second threaded segment 321, so as to seal the connection surface between the bolt 31 and the nut 32 by the second sealing member 332. In an embodiment, the first non-threaded segment 312 and the second non-threaded segment 322 are provided with the first sealing member 331 arranged between the outer side surface of the first non-threaded segment 312 and the inner side surface of the second non-threaded segment 322, and the first threaded segment 311 and the second threaded segment 321 are provided with the second sealing member 332 arranged between the outer side surface of the first threaded segment 311 and the inner side surface of the second threaded segment 321, so as to seal the connection surface between the bolt 31 and the nut 32 by the first sealing member 331 and the second sealing member 332. In this way, the first sealing member 331 and the second sealing member 332 are used on the basis of the first sealing member 331, so as to achieve double sealing and improve the reliability of the sealing.

[0057] By arranging the sealing member 33 in the above manner, the connection surface between the bolt 31 and the nut 32 is sealed, the probability of water and oxygen outside the battery box 10 entering the battery box 10 from the connection surface between the bolt 31 and the nut 32 is reduced, and the sealing performance of the battery device 100 is maintained.

[0058] In an embodiment, the sealing member 33 comprises a first sealing member 331 arranged between the outer side surface of the first non-threaded section 312 and the inner side surface of the second non-threaded section 322, the first sealing member 331 being a sealing ring and being sleeved on the outer side surface of the first non-threaded section 312 (as shown in Figure 3

[0059] The sealing ring is a ring-shaped sealing member; the inner diameter of the sealing ring is sized to match the outer side surface of the first non-threaded section 312, so that the sealing ring can be sleeved on the outer side surface of the first non-threaded section 312. By arranging the first sealing member 331 as a sealing ring, the first sealing member 331 is sleeved on the outer side surface of the first non-threaded section 312, facilitating assembly of the first sealing member 331, while achieving sealing of the entire circumference of the first non-threaded section 312 and achieving good sealing effect.

[0060] In an embodiment, please refer to Figure 4 , Figure 4 is a structural schematic diagram of an embodiment of the bolt provided in the present application. The outer side surface of the first non-threaded section 312 has an annular limiting groove 312a, and part of the sealing ring (i.e., the first sealing member 331) is embedded in the annular limiting groove 312a.

[0061] The annular limiting groove 312a is a groove formed along the entire circumference of the outer side surface of the first non-threaded section 312. By arranging part of the sealing ring to be embedded in the annular limiting groove 312a, the annular limiting groove 312a limits the sealing ring, reducing the probability of displacement of the sealing ring and maintaining the sealing of the connecting surface between the bolt 31 and the nut 32.

[0062] In an embodiment, along the extension direction of the shank of the bolt 31, the outer side surface of the first non-threaded section 312 of the bolt 31 is flush, without the annular limiting groove 312a, and the sealing ring (i.e., the first sealing member 331) is sleeved on the outer side surface of the first non-threaded section 312, the inner diameter of the sealing ring being slightly smaller than the outer diameter of the first non-threaded section 312, and the relative position between the sealing ring and the first non-threaded section 312 being fixed by the elasticity of the sealing ring, thereby maintaining the sealing of the connecting surface between the bolt 31 and the nut 32.

[0063] In an embodiment, please refer to Figure 5 , Figure 5 is a structural schematic diagram of an embodiment of the first sealing member provided in the present application. The sealing ring (i.e., the first sealing member 331) comprises an annular body 3311 and at least two annular protrusions 3312 arranged on the outer side surface of the annular body 3311.

[0064] ​In the axial direction of the sealing ring, the outer side surface of the annular body 3311 is flush, the annular protrusions 3312 are arranged in abutment with the annular body 3311, the annular protrusions 3312 protrude from the outer side surface of the annular body 3311, and the annular protrusions 3312 are arranged around the entire circumference of the annular body 3311. By arranging at least two annular protrusions 3312 on the outer side surface of the annular body 3311, extrusion force is generated on the annular protrusions 3312 during the screwing of the threaded connection between the bolt 31 and the nut 32, and the annular body 3311 is better compressed during the screwing, and the elastic deformation of the annular body 3311 can fill the small gap, thereby maintaining good sealing effect. In addition, by arranging at least two annular protrusions 3312 on the outer side surface of the annular body 3311, the annular protrusions 3312 can enhance the rigidity of the local area, reduce the non-recoverable deformation, and be beneficial to maintaining the flatness and stability of the sealing surface, thereby maintaining good sealing effect.

[0065] Optionally, the first sealing member 331 is an EPDM sealing ring (ethylene propylene diene monomer sealing ring).

[0066] In an embodiment, the gap between the second non-threaded section 322 and the first non-threaded section 312 is in interference fit with the sealing ring.

[0067] The gap between the second non-threaded section 322 and the first non-threaded section 312 in interference fit with the sealing ring means that the outer diameter of the sealing ring (i.e. the first sealing member 331) is slightly larger than the inner diameter of the second non-threaded section 322, and the inner diameter of the sealing ring (i.e. the first sealing member 331) is slightly larger than the outer diameter of the first non-threaded section 312. When the bolt 31 is screwed into the nut 32, the sealing ring is pressed into the second non-threaded section 322 of the nut 32, and the sealing ring is tightly connected between the second non-threaded section 322 of the nut 32 and the first non-threaded section 312 of the bolt 31, thereby reducing the small gap between the sealing ring and the second non-threaded section 322 of the nut 32 and the small gap between the sealing ring and the first non-threaded section 312 of the bolt 31, effectively preventing water and oxygen outside the battery box 10 from passing through, and achieving good sealing effect. In addition, by arranging the gap between the second non-threaded section 322 and the first non-threaded section 312 in interference fit with the sealing ring, the pressure on the sealing ring is more evenly distributed, which helps to ensure that the entire circumferential sealing surface of the sealing ring can effectively function.

[0068] In an embodiment, the sealing member 33 includes a second sealing member 332 arranged between the outer side surface of the first threaded section 311 and the inner side surface of the second threaded section 321; the second sealing member 332 is sealing glue.

[0069] The sealing glue is a film layer with sealing performance, and the thickness of the sealing glue is thin. The sealing glue can be clamped between the inner side surface of the second threaded segment 321 and the outer side surface of the first threaded segment 311; the sealing glue can be firmly attached to the inner side surface of the second threaded segment 321 or the outer side surface of the first threaded segment 311 in advance, and the specific design is performed according to the needs.

[0070] By setting the second sealing member 332 as the sealing glue, the surface of the sealing glue undulates with the threads of the second threaded segment 321 or the threads of the first threaded segment 311, maintains the threaded shape of the second threaded segment 321 or the threaded shape of the first threaded segment 311, and realizes good sealing while maintaining the threaded connection between the bolt 31 and the nut 32.

[0071] Optionally, the second sealing member 332 is Precote85 sealing glue.

[0072] In an embodiment, the nut 32 is a through-hole structure; or, the nut 32 is a blind hole structure, and one end of the bolt 31 is arranged in the blind hole of the nut 32.

[0073] In the case of the through-hole structure of the nut 32, both ends of the nut 32 are unobstructed without the blocking of elements such as partitions. In the case of the blind hole structure of the nut 32, the nut 32 is a hollow structure with one end open, and the other end of the nut 32 has a bottom wall.

[0074] By setting the nut 32 as a through-hole structure, the length of the bolt 31 can be less than the length of the nut 32, and the length of the bolt 31 can also be equal to or greater than the length of the nut 32, thereby expanding the length range of the bolt 31 that is suitable for the nut 32.

[0075] By setting the nut 32 as a blind hole structure, the debris generated by processing can be reduced from falling into the battery box 10 from the nut 32; in combination with the setting of the first sealing member 331 and / or the second sealing member 332, the connection between the bolt 31 and the nut 32 is sealed, which can reduce the rusting of the hole bottom of the nut 32 and maintain the long-term sealing effectiveness.

[0076] In an embodiment, the first main body part and the second main body part include any two of the upper cover, the frame, the support beam, and the bottom guard plate 122.

[0077] By setting the first main body part and the second main body part as described above, the pull-rivet lock assembly can be used for the fixed connection between any two structural members of the upper cover, the frame, the support beam, and the bottom guard plate 122, while having good sealing effect.

[0078] In an embodiment, please refer to Figure 6 , Figure 6 is Figure 3An enlarged structural schematic view of the N region shown. The battery device 100 further comprises a third seal 13 disposed between the first body portion and the second body portion and adjacent to the pull-rivet locking assembly 30; and / or, the battery device 100 further comprises a fourth seal 14 disposed at the connection between the nut 32 and the first body portion or the connection between the nut 32 and the second body portion.

[0079] Through the above arrangement, the water and oxygen outside the battery case 10 are effectively prevented from entering the inside of the case through the gap between the nut 32 and the first body portion or the gap between the nut 32 and the second body portion, achieving a good sealing effect.

[0080] Please refer to Figure 7 , Figure 7 is Figure 3 a schematic view of the flow of fluid in the structure shown.

[0081] As Figure 7 shown, the water and oxygen outside the battery case 10 can enter the battery case 10 through the gap between the bolt 31 and the nut 32. By the first seal 331 between the outer side of the first non-threaded section 312 and the inner side of the second non-threaded section 322, and / or the second seal 332 between the outer side of the first threaded section 311 and the inner side of the second threaded section 321, the first seal 331 and / or the second seal 332 prevent the water and oxygen outside the battery case 10 from entering the battery case 10 through the gap between the bolt 31 and the nut 32, achieving a good sealing effect of the battery case 10.

[0082] Specific examples, as Figure 7 shown, the water and oxygen outside the battery case 10 can enter the battery case 10 through the gap between the nut 32 and the first body portion (case 121); by disposing the third seal 13 between the first body portion (case 121) and the second body portion (bottom guard plate 122) and adjacent to the pull-rivet locking assembly 30; and / or disposing the fourth seal 14 at the connection between the nut 32 and the first body portion or the second body portion, the third seal 13 and / or the fourth seal 14 prevent the water and oxygen outside the battery case 10 from entering the inside of the case through the gap between the nut 32 and the first body portion or the second body portion, achieving a good sealing effect of the battery case 10.

[0083] Please refer to Figure 1The battery monomer 20 refers to the smallest unit constituting the battery device 100. In the battery device 100, the battery monomer 20 can be multiple, and the multiple battery monomers 20 can be connected in series or in parallel or in a mixed manner. The mixed manner refers to that the multiple battery monomers 20 are connected in series and in parallel. The multiple battery monomers 20 can be directly connected in series or in parallel or in a mixed manner, and then the multiple battery monomers 20 are accommodated in the battery box 10 as a whole. Of course, the battery device 100 can also be that the multiple battery monomers 20 are connected in series or in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the battery box 10. Each battery monomer 20 can be a secondary battery. The battery monomer 20 can be in the shape of a cylinder, a flat body, a cuboid or other shapes.

[0084] The battery device 100 can further include other structures, for example, the battery device 100 can further include a current collection component for realizing electrical connection between the multiple battery monomers 20, and the battery device 100 can further include a water cooling assembly for realizing cooling of the multiple battery monomers 20.

[0085] Please refer to Figure 8 , Figure 8 is a decomposition structure diagram of a battery monomer provided by the embodiment of the application.

[0086] The battery monomer 20 includes an end cover 21, a shell 22, a cell assembly 23 and other functional components.

[0087] The end cover 21 refers to a component covering the opening of the shell 22 to isolate the internal environment of the battery monomer 20 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 21 is not easy to deform when subjected to extrusion and collision, so that the battery monomer 20 can have higher structural strength, and the stability can also be improved.

[0088] The end cover 21 can be provided with functional components such as an electrode terminal 21a. The electrode terminal 21a can be used for electrical connection with the cell assembly 23 for output or input of the electrical energy of the battery monomer 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery monomer 20 when the internal pressure or temperature of the battery monomer 20 reaches a threshold value.

[0089] The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic and the like, and the embodiment of the application does not specially limit this.

[0090] In some embodiments, an insulating member can be further provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. For example, the insulating member can be made of plastic, rubber, or the like.

[0091] The shell 22 is a component used to cooperate with the end cover 21 to form an internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electric core assembly 23, the electrolyte, and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is used to cover the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 22, the end cover 21 is used to cover the shell 22. The shell 22 can have various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, and the like. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electric core assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like, and the present application does not make special limitations on this.

[0092] The electric core assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electric core assemblies 23 can be contained in the shell 22. The electric core assembly 23 includes a positive electrode sheet, a negative electrode sheet, and a separator, the separator is located between the positive electrode sheet and the negative electrode sheet, and the positive electrode sheet and the negative electrode sheet are wound or stacked to form the electric core assembly 23. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting the main body of the electric core assembly 23, and a portion of the positive electrode sheet and the negative electrode sheet without active material each constitutes a tab 23a. The positive and negative tabs can be located at one end of the main body or at two ends of the main body, respectively. In the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tab 23a is connected to the electrode terminal 21a to form a current loop.

[0093] The battery device disclosed in the embodiments of the present application can be used in an electric device using a battery as a power source or a variety of energy storage systems using a battery as an energy storage element. The electric device includes a device main body and the battery device provided in the above embodiments, and the battery device is arranged in the device main body. The electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0094] The following embodiments are described by taking a vehicle 1000 as an example. Please refer to Figure 9 , Figure 9 The structure of the vehicle provided in the embodiments of the present application is shown in the following figure.

[0095] The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0096] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, to replace or partially replace the fuel or natural gas to provide driving power for the vehicle 1000.

[0097] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the above embodiments of the present application have been described in detail, those skilled in the art should understand that the technical solutions described in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. In particular, each technical feature 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 device, characterized by, The battery device comprises: a battery box body comprising a first main body part and a second main body part; a pull-rivet locking assembly for fixedly connecting the first main body part and the second main body part, the pull-rivet locking assembly comprising a bolt and a nut; wherein the pull-rivet locking assembly further comprises a sealing member arranged between an outer side surface of the bolt and an inner side surface of the nut.

2. The battery device according to claim 1, wherein: the bolt comprises a first threaded segment and a first non-threaded segment, and the nut comprises a second threaded segment and a second non-threaded segment; wherein: the sealing member comprises a first sealing member arranged between an outer side surface of the first non-threaded segment and an inner side surface of the second non-threaded segment; and / or the sealing member comprises a second sealing member arranged between an outer side surface of the first threaded segment and an inner side surface of the second threaded segment.

3. The battery device according to claim 2, wherein: the sealing member comprises a first sealing member arranged between an outer side surface of the first non-threaded segment and an inner side surface of the second non-threaded segment; the first sealing member is a sealing ring and is sleeved on the outer side surface of the first non-threaded segment.

4. The battery device according to claim 3, wherein: the outer side surface of the first non-threaded segment has an annular limiting groove, and part of the sealing ring is embedded in the annular limiting groove.

5. The battery device according to claim 3 or 4, wherein: the sealing ring comprises an annular body and at least two annular protrusions arranged on an outer side surface of the annular body.

6. The battery device according to any one of claims 3 to 5, wherein: a gap between the second non-threaded segment and the first non-threaded segment is in interference fit with the sealing ring.

7. The battery device according to claim 2, wherein: the sealing member comprises a second sealing member arranged between an outer side surface of the first threaded segment and an inner side surface of the second threaded segment; the second sealing member is a sealing glue.

8. The battery device according to any one of claims 1 to 7, wherein: the nut is a through-hole structure; or the nut is a blind hole structure, and one end of the bolt is arranged in the blind hole of the nut.

9. The battery device according to any one of claims 1 to 8, wherein: the first main body part and the second main body part comprise any two of an upper cover, a frame, a support beam and a bottom guard plate.

10. The battery device according to any one of claims 1 to 9, characterized by, The battery device further comprises a third sealing member arranged between the first main body part and the second main body part and adjacent to the pull-rivet locking assembly; and / or the battery device further comprises a fourth sealing member arranged at a connection between the nut and the first main body part or at a connection between the nut and the second main body part.

11. An electrical device, characterized by The device comprises: a device main body; and the battery device according to any one of claims 1 to 10, which is arranged in the device main body. ​

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