Pressing rivet structure and battery monomer

Abstract

The utility model relates to the technical field of batteries, and particularly provides a pressing rivet structure and a battery monomer, and the pressing rivet structure comprises a first wall, a target through hole and a flange, the target through hole is formed in the first wall, and the target through hole comprises an orifice. A plurality of turnups are arranged, each turnup comprises a fixed end and a free end, and the fixed end of each turnup is connected with the first wall; and in the multiple turned-over edges, at least part of the turned-over edges are arranged around the hole opening. According to the pressing rivet structure and the battery monomer, the plurality of turnups are arranged to replace an integrated annular boss, so that the sealing body is limited and fixed, and wrinkles can be avoided, so that the sealing body is uniformly stressed, the sealing effect is improved, and the reliability and the safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a press-fit structure and a battery cell. Background Technology

[0002] With the development of the new energy industry, lithium batteries, as the main power source for electric vehicles, have been widely used, and their safety has become a major concern.

[0003] Taking a certain lithium battery as an example, during its production process, after electrolyte is injected into the battery through the injection hole opened on the top cover, the injection hole needs to be sealed. The conventional sealing method is to use a sealing ring and a sealing cap to seal the injection hole, and then weld the sealing cap to the top cover. This type of sealing method is limited by the welding quality between the sealing cap and the top cover, resulting in poor battery reliability.

[0004] In existing technologies, a ring-shaped flange is set around the injection hole and riveted to the sealing cap, replacing welding to achieve the limiting and fixing of the sealing cap. While this improves battery reliability to some extent, the ring-shaped flange will wrinkle during riveting, resulting in uneven stress during flange compression. This, in turn, leads to uneven compression of the sealing ring and poses a risk of leakage. Utility Model Content

[0005] The riveting structure and battery cell provided in this embodiment of the utility model at least solve the problems of uneven stress and leakage risk caused by wrinkles in the integrated annular flange. By setting multiple flanges to replace the integrated annular boss, the sealing body is limited and fixed, which can avoid wrinkles, thereby making the sealing body uniformly stressed, improving the sealing effect, and enhancing reliability and safety.

[0006] In a first aspect, the present invention provides a press-fit structure, comprising a first wall; a target through hole disposed on the first wall, the target through hole including an opening; and multiple flanges, each flange including a fixed end and a free end, the fixed end of each flange being connected to the first wall; wherein at least a portion of the multiple flanges are arranged around the opening.

[0007] In one embodiment of the present invention, the first wall is provided with a first receiving groove; the fixed end of each of the flanges is connected to the bottom of the first receiving groove; and / or, the first wall and located inside the fixed end of the flange are provided with a second receiving groove, the orifice is formed at the bottom of the second receiving groove, and the second receiving groove is configured to receive at least a portion of the sealing body; and / or, the first wall is provided with a first positioning groove, the first positioning groove is located between the outer periphery of the orifice and the inner side of the fixed end of the flange, and the first positioning groove is configured to receive a portion of the sealing ring.

[0008] In one embodiment of this utility model, the flange is integrally formed with the first wall; or, the fixed end is welded to the first wall.

[0009] In one embodiment of the present invention, the cross-sectional area of ​​the flange gradually decreases in the extension direction from the fixed end to the free end of the flange.

[0010] In one embodiment of this utility model, a plurality of the flanges are distributed at equal intervals along the circumference of the opening.

[0011] Secondly, this utility model also provides a battery cell, including a first wall; a target through hole disposed on the first wall, the target through hole including an opening; a flange, wherein a plurality of flanges are provided, each flange including a fixed end and a free end, the fixed end of each flange being connected to the first wall; at least a portion of the flanges are arranged around the opening; a sealing body covering the opening; the sealing body being confined between the first wall and the free end of the flange.

[0012] In one embodiment of the present invention, the first wall is provided with a first receiving groove; the fixed end of each flange is connected to the bottom of the first receiving groove, and the free end of each flange does not protrude from the first receiving groove; and / or, the first wall and located inside the fixed end of the flange are provided with a second receiving groove, the orifice is formed at the bottom of the second receiving groove, and at least a portion of the sealing body is received in the second receiving groove.

[0013] In one embodiment of this utility model, a sealing ring is provided between the sealing body and the first wall, and the first wall is provided with a first positioning groove. The first positioning groove is located between the outer peripheral side of the orifice and the inner side of the fixed end of the flange, and a portion of the sealing ring is accommodated in the first positioning groove.

[0014] In one embodiment of this utility model, a sealing ring is provided between the sealing body and the first wall, and the sealing ring is located between the outer peripheral side of the orifice and the inner side of the fixed end of the flange.

[0015] In one embodiment of the present invention, a second positioning groove is provided on the side of the sealing body facing the sealing ring, and a portion of the sealing ring is accommodated in the second positioning groove.

[0016] In one embodiment of this utility model, the flange is integrally formed with the first wall; or, the fixed end is welded to the first wall.

[0017] In one embodiment of the present invention, each flange includes a bent portion and an abutting portion connected in sequence, wherein the end of the abutting portion away from the bent portion is the free end; the sealing body is confined between the first wall and the abutting portion of the flange.

[0018] In one embodiment of this utility model, the abutting portions of the plurality of flanges are all equally spaced along the circumference of the opening.

[0019] In one embodiment of the present invention, the cross-sectional area of ​​the flange gradually decreases in the extending direction from the fixed end to the free end of the flange.

[0020] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0021] The riveting structure and battery cell described in this invention, by incorporating multiple flanges instead of a single annular boss, effectively limit and fix the sealing body. Furthermore, the multiple flanges surrounding the opening are spaced apart from adjacent flanges. During riveting, this ensures even force distribution on the flanges and minimizes wrinkling. Therefore, the sealing body, fixed by the flanges, experiences uniform force, improving the sealing effect, preventing leakage, and enhancing the battery's reliability and safety. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is one of the structural schematic diagrams of the press-fit structure in a preferred embodiment of this utility model.

[0024] Figure 2 This is one of the cross-sectional structural schematic diagrams of the riveting structure in a preferred embodiment of this utility model.

[0025] Figure 3 This is the second cross-sectional view of the riveting structure in a preferred embodiment of this utility model.

[0026] Figure 4 This is the third cross-sectional view of the riveting structure in the preferred embodiment of this utility model.

[0027] Figure 5 This is the fourth cross-sectional view of the riveting structure in a preferred embodiment of this utility model.

[0028] Figure 6 This is the fifth cross-sectional view of the riveting structure in the preferred embodiment of this utility model.

[0029] Figure 7 This is the sixth cross-sectional view of the riveting structure in the preferred embodiment of this utility model.

[0030] Figure 8 This is the seventh cross-sectional view of the riveting structure in the preferred embodiment of this utility model.

[0031] Figure 9 This is the eighth cross-sectional schematic diagram of the riveting structure in the preferred embodiment of this utility model.

[0032] Figure 10 This is the ninth cross-sectional structural schematic diagram of the riveting structure in the preferred embodiment of this utility model.

[0033] Figure 11 This is the second structural schematic diagram of the riveting structure in a preferred embodiment of this utility model.

[0034] Figure 12 This is the third structural schematic diagram of the riveting structure in the preferred embodiment of this utility model.

[0035] Figure 13 This is a partial structural schematic diagram of the riveting structure in a preferred embodiment of this utility model.

[0036] Figure 14 This is a partial structural schematic diagram of a battery cell in a preferred embodiment of the present invention.

[0037] Figure 15 This is one of the partial cross-sectional structural schematic diagrams of a battery cell in a preferred embodiment of this utility model.

[0038] Figure 16 This is the second partial cross-sectional view of a battery cell in a preferred embodiment of this utility model.

[0039] Figure 17 This is the third partial cross-sectional view of a battery cell in a preferred embodiment of this utility model.

[0040] Figure 18 This is the fourth partial cross-sectional view of a battery cell in a preferred embodiment of this utility model.

[0041] Figure 19 This is the fifth partial cross-sectional view of a battery cell in a preferred embodiment of this utility model.

[0042] Figure 20 This is the sixth partial cross-sectional view of a battery cell in a preferred embodiment of this utility model.

[0043] Figure 21 This is the seventh partial cross-sectional view of a battery cell in a preferred embodiment of this utility model.

[0044] Figure 22 This is the eighth partial cross-sectional structural schematic diagram of a battery cell in a preferred embodiment of this utility model.

[0045] Figure 23 This is the ninth partial cross-sectional structural schematic diagram of a battery cell in a preferred embodiment of this utility model.

[0046] Figure 24 This is the tenth partial cross-sectional structural schematic diagram of a battery cell in a preferred embodiment of this utility model.

[0047] Figure 25 This is the eleventh partial cross-sectional structural schematic diagram of a battery cell in a preferred embodiment of this utility model.

[0048] Figure 26 This is the twelfth partial cross-sectional structural schematic diagram of a battery cell in a preferred embodiment of this utility model.

[0049] Figure 27 This is the thirteenth partial cross-sectional structural schematic diagram of a battery cell in a preferred embodiment of this utility model.

[0050] Figure 28 This is the fourteenth partial cross-sectional structural schematic diagram of a battery cell in a preferred embodiment of this utility model.

[0051] The above figures include the following reference numerals:

[0052] 10. First wall; 101. First surface; 102. Second surface; 11. Target through hole; 111. Orifice; 12. First receiving groove; 13. Second receiving groove; 14. First positioning groove; 20. Flanged edge; 21. Fixed end; 22. Free end; 23. Bending part; 24. Abutting part; 25. Side of the platform; 251. Extended surface; 252. Extended intersection line; 31. Sealing body; 311. Second positioning groove; 32. Sealing ring. Detailed Implementation

[0053] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0056] Reference Figure 1 and Figure 2 As shown, this utility model provides a press-fit structure, including a first wall 10, a target through hole 11, and a flange 20.

[0057] The first wall 10 is used to house various components. Those skilled in the art can configure the first wall 10 according to actual needs; for example, the battery cover, or part of the casing, or the terminal post, or the explosion-proof sheet can be selected as the first wall 10.

[0058] The target through-hole 11 is the through-hole to be sealed, and it is located on the first wall 10. Those skilled in the art can select a specific target through-hole 11 according to actual needs; for example, an injection hole or an electrode mounting hole can be selected as the target through-hole 11. The target through-hole 11 includes an orifice 111. After completing the corresponding steps, the orifice 111 is sealed by a sealing body 31. For example, the sealing body 31 can be a sealing cap or a sealing pin.

[0059] The flange 20 is designed to be foldable and is used to mate with the sealing body 31. The flange 20 limits and fixes the sealing body 31, thereby achieving a seal on the target through hole 11. Multiple flanges 20 are provided. Each flange 20 includes a fixed end 21 and a free end 22, and the fixed end 21 of each flange 20 is connected to the first wall 10. At least a portion of the flanges 20 are arranged around the opening 111, and there is a certain interval between adjacent flanges 20.

[0060] For example, all the flanges 20 are arranged around the orifice 111. After the installation of the sealing body 31 is completed, pressure is applied to the flanges 20 so that each flange 20 can press against the sealing body 31, thereby sealing the target through hole 11.

[0061] Of course, some of the flanges 20 can be arranged around the orifice 111, while the remaining flanges 20 are arranged around the outer side of the corresponding flanges 20, forming a concentric ring structure. After the sealing body 31 is installed, pressure is applied to the flanges 20 so that the innermost flange 20 can press against the sealing body 31, thereby sealing the target through hole 11; while the flanges 20 located on the outer ring can press against the corresponding inner flanges 20, enhancing the sealing effect.

[0062] The number of flanges can be set to 6, 8, 10, 12, 14, 16, 18, or 20, depending on the specific requirements.

[0063] The riveting structure described in this invention, by providing multiple flanges 20 instead of an integral annular boss, effectively limits and fixes the sealing body 31. Furthermore, among the multiple flanges 20 surrounding the orifice 111, adjacent flanges 20 are spaced apart. During riveting, the flanges 20 are subjected to uniform force, minimizing wrinkles. Therefore, the sealing body 31, fixed by the flanges 20, receives uniform force, improving the sealing effect, preventing leakage, and enhancing the reliability and safety of the battery.

[0064] Reference Figure 1 and Figure 2 As shown, in some embodiments of the press-fit structure of this utility model, the first wall 10 has a first surface 101 and a second surface 102 disposed opposite to each other along its thickness direction. The target through hole 11 penetrates the first surface 101 and the second surface 102 of the first wall 10, and forms an opening 111 on the first surface 101 of the first wall 10. All the flanges 20 are spaced around the opening 111, and the fixed ends 21 of all the flanges 20 are connected to the first surface 101 of the first wall 10.

[0065] In some embodiments of the press-fit structure of this utility model, the first wall 10 is provided with a first receiving groove 12; the fixed end 21 of each flange 20 is connected to the bottom of the first receiving groove 12; and / or, the first wall 10 is provided with a second receiving groove 13 located inside the fixed end 21 of the flange 20, an opening 111 is formed at the bottom of the second receiving groove 13, and the second receiving groove 13 is configured to accommodate at least a portion of the sealing body 31; and / or, the first wall 10 is provided with a first positioning groove 14, the first positioning groove 14 is located between the outer periphery of the opening 111 and the inner side of the fixed end 21 of the flange 20, and the first positioning groove 14 is configured to accommodate a portion of the sealing ring 32. Thus, seven press-fit structures are included.

[0066] The first type: Reference Figure 3 As shown, in the riveting structure described in this embodiment, the first surface 101 of the first wall 10 is provided with a first receiving groove 12, and the fixed end 21 of the flange 20 is connected to the bottom of the first receiving groove 12. Correspondingly, the orifice 111 is also provided at the bottom of the first receiving groove 12. By providing the first receiving groove 12, on the one hand, the bending difficulty of the flange 20 can be reduced, making the flange 20 easier to bend and improving the efficiency of sealing operations. On the other hand, the first receiving groove 12 can accommodate the bent flange 20, so that the bent flange 20 does not protrude from the first wall 10 as much as possible, or even does not protrude from the first wall 10 at all, thereby avoiding occupying extra space and improving space utilization.

[0067] The second method: Reference Figure 4 As shown, in the riveting structure described in this embodiment, the first surface 101 of the first wall 10 is provided with a second receiving groove 13, the fixed end 21 of the flange 20 is fixed on the first surface 101, and the second receiving groove 13 is located inside the fixed end 21 of the flange 20. Correspondingly, the orifice 111 is also provided at the bottom of the groove of the second receiving groove 13. The second receiving groove 13 is configured to accommodate at least a portion of the sealing body 31. For example, along the thickness direction of the first wall 10, the second receiving groove 13 accommodates only a portion of the sealing body 31; or, along the thickness direction of the first wall 10, the second receiving groove 13 accommodates all of the sealing body 31. By providing the second receiving groove 13, on the one hand, the sealing body 31 can be positioned by the groove wall surface of the second receiving groove 13, which improves the installation efficiency of the sealing body 31 and avoids relative movement or misalignment of the sealing body 31, ensuring a good sealing effect. On the other hand, by accommodating the sealing body 31 in the second receiving groove 13, the external space required by the sealing body 31 can be reduced to a certain extent, thereby improving space utilization.

[0068] The third type: Reference Figure 5As shown, in the riveting structure described in this embodiment, the first surface 101 of the first wall 10 is provided with a first positioning groove 14 and an opening 111. The fixed end 21 of the flange 20 is fixed on the first surface 101. The first positioning groove 14 is located between the outer periphery of the opening 111 and the inner side of the fixed end 21 of the flange 20. The first positioning groove 14 is configured to accommodate the sealing ring 32 of the portion.

[0069] For example, the first positioning groove 14 is configured as an annular shape, and the width of the first positioning groove 14 is not less than the annular width of the sealing ring 32, so as to accommodate the entire sealing ring 32 through the first positioning groove 14. Alternatively, the width of the first positioning groove 14 is less than the annular width of the sealing ring 32, and the sealing ring 32 is provided with a protrusion corresponding to the first positioning groove 14, so as to cooperate with the first positioning groove 14 to achieve positioning. Here, the protrusion can be configured as an annular shape, and the corresponding first positioning groove 14 is also configured as an annular shape; or the protrusion can be configured as a block shape, and the corresponding first positioning groove 14 is also configured as a block shape. In this case, multiple first positioning grooves 14 can be provided, and the multiple first positioning grooves 14 are evenly distributed around the orifice 111.

[0070] By providing the first positioning groove 14, when the sealing ring 32 needs to be used, on the one hand, the sealing ring 32 can be positioned through the first positioning groove 14, which improves the installation efficiency of the sealing ring 32 and prevents relative movement or misalignment of the sealing ring 32, ensuring a good sealing effect. On the other hand, by accommodating the sealing ring 32 through the first positioning groove 14, the space occupied by the sealing ring 32 can be reduced to a certain extent, improving space utilization. Preferably, the diameters of both the sealing ring 32 and the first positioning groove 14 are smaller than the diameter of the sealing element, so that the sealing element can better compress the sealing ring 32 and achieve a good sealing effect.

[0071] The fourth type: reference Figure 6 As shown, in the riveting structure described in this embodiment, the first wall 10 is simultaneously provided with a first receiving groove 12 and a second receiving groove 13. Specifically, the first receiving groove 12 is provided on the first surface 101 of the first wall 10, and the fixed end 21 of the flange 20 is connected to the bottom of the first receiving groove 12. The second receiving groove 13 is provided at the bottom of the first receiving groove 12, and the second receiving groove 13 is located inside the fixed end 21 of the flange 20. The second receiving groove 13 communicates with the first receiving groove 12, and the orifice 111 is formed at the bottom of the second receiving groove 13. By simultaneously providing the first receiving groove 12 and the second receiving groove 13, the effects of both can be well combined, and the processing difficulty can be reduced when the two grooves are connected.

[0072] It should be noted that the first receiving slot 12 and the second receiving slot 13 can also operate independently of each other. Specifically, refer to... Figure 7As shown, a recess is provided on the first surface 101 of the first wall 10. The bottom of the recess has a first annular receiving groove 12 and a second receiving groove 13 located within the annulus of the first receiving groove 12. The fixed end 21 of the flange 20 is fixed to the bottom of the first receiving groove 12, and the orifice 111 is located at the bottom of the second receiving groove 13. By making the first receiving groove 12 and the second receiving groove 13 independent of each other, the bending of the flange 20 and the positioning of the sealing body 31 can be better realized.

[0073] Fifth type: Reference Figure 8 As shown, in the riveting structure described in this embodiment, the first wall 10 is simultaneously provided with a first receiving groove 12 and a first positioning groove 14. Specifically, the first receiving groove 12 is disposed on the first surface 101 of the first wall 10, the fixed end 21 of the flange 20 is fixed to the bottom of the first receiving groove 12, and the first positioning groove 14 and the orifice 111 are both disposed at the bottom of the first receiving groove 12, with the first positioning groove 14 located between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20. By simultaneously providing the first receiving groove 12 and the first positioning groove 14, the effects of both can be well combined.

[0074] Sixth type: Reference Figure 9 As shown, in the riveting structure described in this embodiment, the first wall 10 is simultaneously provided with a second receiving groove 13 and a first positioning groove 14. Specifically, the fixed end 21 of the flange 20 is fixed to the first surface 101 of the first wall 10, the second receiving groove 13 is provided on the first surface 101, and the second receiving groove 13 is located inside the fixed end 21 of the flange 20. The orifice 111 and the first positioning groove 14 are both located at the bottom of the second receiving groove 13, and the first positioning groove 14 is located between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20. By simultaneously providing the second receiving groove 13 and the first positioning groove 14, the effects of both can be well combined.

[0075] Seventh type: Reference Figure 10 and Figure 11 As shown, in the riveting structure described in this embodiment, the first wall 10 is simultaneously provided with a first receiving groove 12, a second receiving groove 13, and a first positioning groove 14. Specifically, the first receiving groove 12 is disposed on the first surface 101 of the first wall 10, and the fixed end 21 of the flange 20 is disposed at the bottom of the first receiving groove 12. The second receiving groove 13 is disposed at the bottom of the first receiving groove 12, and is disposed inside the fixed end 21 of the flange 20. The orifice 111 and the first positioning groove 14 are both disposed at the bottom of the second receiving groove 13, and the first positioning groove 14 is disposed between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20 to achieve the best effect.

[0076] Those skilled in the art can configure the connection method between the flange 20 and the first wall 10 according to actual needs. In some embodiments, the fixed end 21 of each flange 20 is connected to the first wall 10. This can be understood as the fixed end 21 of the flange 20 being welded to the first wall 10, or the fixed end 21 of the flange 20 being integrally formed with the first wall 10 to ensure strength. It can also be understood that the fixed ends 21 of multiple flanges 20 are connected to form a ring structure, which is welded to or integrally formed with the first wall 10.

[0077] Those skilled in the art can set the specific shape of the flange 20 according to actual needs. (Refer to...) Figure 11 As shown, in some embodiments of the press-fit structure of this utility model, the cross-sectional area of ​​the flange 20 gradually decreases from the fixed end 21 to the free end 22. By setting the flange 20 to a tapered shape, on the one hand, it can avoid the flanges 20 overlapping each other after bending, thus improving space utilization. On the other hand, it can also ensure the limiting and fixing effect of the flange 20 on the sealing body 31, making the riveting force uniform and the sealing effect good.

[0078] Preferred, refer to Figure 12 and Figure 13 As shown, the flange 20 includes two side surfaces 25, an inner side surface, and an outer side surface. The inner and outer sides of the flange 20 are arranged opposite each other along the thickness direction of the flange 20. The side surfaces 25, the inner side surface, and the outer side surface are all connected to the first wall 10, and are sequentially connected. Each side surface 25 is inclined, and the extended surfaces 251 of two side surfaces 25 can intersect, so that the cross-sectional area of ​​the flange 20 gradually decreases in the extension direction from the fixed end 21 to the free end 22. Those skilled in the art can configure the side surfaces 25 according to actual needs; for example, the side surface 25 can be configured as an inclined plane, or as an inclined convex surface, or as an inclined concave surface, etc.

[0079] Preferred, refer to Figure 13 As shown, the intersection line of the extended surfaces 251 of the two platform sides 25 of the flange 20 is the extended intersection line 252. The distance from the extended intersection line 252 to the first wall 10 is H, which satisfies the relationship H≤D1, where the inner surfaces of the multiple flanges 20 surrounding the orifice 111 form a cylindrical space, and D1 is the diameter of the cross-section of the cylindrical space.

[0080] Reference Figure 11 and Figure 12As shown, in some embodiments of the press-fit structure of this utility model, multiple flanges 20 are evenly distributed along the circumference of the opening 111. By setting the flanges 20 to be evenly distributed, the flanges 20 can provide a more uniform riveting force to the sealing body 31 after bending, thereby ensuring a good sealing effect.

[0081] Reference Figure 14 and Figure 15 As shown, this utility model also provides a battery cell, including a first wall 10, a target through hole 11, a flange 20, and a sealing body 31.

[0082] The first wall 10 is used to house various components. Those skilled in the art can configure the first wall 10 according to actual needs; for example, the battery cover, or part of the casing, or the terminal post, or the explosion-proof sheet can be selected as the first wall 10.

[0083] The target through-hole 11 is the through-hole to be sealed, and it is located on the first wall 10. Those skilled in the art can select a specific target through-hole 11 according to actual needs; for example, an injection hole or an electrode mounting hole can be selected as the target through-hole 11. The target through-hole 11 includes an orifice 111. After completing the corresponding steps, the sealing body 31 covers and seals the orifice 111. For example, the sealing body 31 can be a sealing cap or a sealing pin.

[0084] The flange 20 is used to cooperate with the sealing body 31, and the sealing body 31 is fixed by limiting the flange 20 to achieve a seal for the target through hole 11. Multiple flanges 20 are provided. At least a portion of the flanges 20 are arranged around the opening 111, and there is a certain interval between adjacent flanges 20. Each flange 20 includes a fixed end 21 and a free end 22, and the fixed end 21 of each flange 20 is connected to the first wall 10. The sealing body 31 is limited between the first wall 10 and the free end 22 of the flange 20.

[0085] For example, all the flanges 20 are arranged around the orifice 111. After the installation of the sealing body 31 is completed, pressure is applied to the flanges 20 so that each flange 20 can press against the sealing body 31, thereby sealing the target through hole 11.

[0086] Of course, some of the flanges 20 can be arranged around the orifice 111, while the remaining flanges 20 are arranged around the outer side of the corresponding flanges 20, forming a concentric ring structure. After the sealing body 31 is installed, pressure is applied to the flanges 20 so that the innermost flange 20 can press against the sealing body 31, thereby sealing the target through hole 11; while the flanges 20 located on the outer ring can press against the corresponding inner flanges 20, enhancing the sealing effect.

[0087] The number of flanges can be set to 6, 8, 10, 12, 14, 16, 18, or 20, depending on the specific requirements.

[0088] The battery cell of this invention, by providing multiple flanges 20 instead of an integral annular boss, effectively limits and fixes the sealing body 31. Furthermore, among the multiple flanges 20 surrounding the opening 111, adjacent flanges 20 are spaced apart. During the pressing and riveting of the flanges 20, the flanges 20 are subjected to uniform force, minimizing wrinkles. Therefore, the sealing body 31, limited and fixed by the flanges 20, can be subjected to uniform force, thereby improving the sealing effect, preventing leakage, and enhancing the reliability and safety of the battery.

[0089] Reference Figure 14 and Figure 15 As shown, in the battery cell of this utility model, the first wall 10 has a first surface 101 and a second surface 102 disposed opposite to each other along its thickness direction. The target through hole 11 penetrates the first surface 101 and the second surface 102 of the first wall 10, and forms an opening 111 on the first surface 101 of the first wall 10. All the flanges 20 are arranged at intervals around the opening 111, and the fixed ends 21 of all the flanges 20 are connected to the first surface 101 of the first wall 10.

[0090] Each flange 20 includes a bent portion 23 and an abutting portion 24 connected in sequence. The end of the abutting portion 24 away from the bent portion 23 is a free end 22, and the end of the bent portion 23 away from the abutting portion 24 is a fixed end 21. The sealing body 31 is confined between the first wall 10 and the abutting portion 24 of the flange 20. During sealing, after the sealing body 31 is installed, pressure is applied to the flange 20 to bend it, thereby allowing the abutting portion 24 of the flange 20 to abut against the sealing body 31 for anchoring. It should be noted that, in order to ensure the fixed connection between the flange 20 and the sealing body 31, the abutting portion 24 of the flange 20 and the sealing body 31 can also be connected by welding after the abutting portion 24 of the flange 20 abuts against the sealing body 31.

[0091] In some embodiments of the battery cell described in this utility model, the first wall 10 is provided with a first receiving groove 12; the fixed end 21 of each flange 20 is connected to the bottom of the first receiving groove 12, and the free end 22 of each flange 20 does not protrude from the first receiving groove 12; and / or, the first wall 10 and the inner side of the fixed end 21 of the flange 20 are provided with a second receiving groove 13, the orifice 111 is formed at the bottom of the second receiving groove 13, and at least a portion of the sealing body 31 is received in the second receiving groove 13.

[0092] For example, refer to Figure 16As shown, the first surface 101 of the first wall 10 is only provided with a first receiving groove 12. The fixed end 21 of the flange 20 is connected to the bottom of the first receiving groove 12, and the free end 22 of each flange 20 does not protrude from the first receiving groove 12. Correspondingly, the orifice 111 is also provided at the bottom of the first receiving groove 12. By providing the first receiving groove 12, on the one hand, the bending difficulty of the flange 20 can be reduced, making the flange 20 easier to bend and improving the efficiency of sealing operations. On the other hand, the first receiving groove 12 can accommodate the bent flange 20, so that the bent flange 20 does not protrude from the first wall 10 as much as possible, or even does not protrude from the first wall 10 at all, thereby avoiding occupying extra space and improving space utilization.

[0093] For example, refer to Figure 17 As shown, the first surface 101 of the first wall 10 is only provided with a second receiving groove 13. Specifically, the fixed end 21 of the flange 20 is fixed on the first surface 101, and the second receiving groove 13 is provided inside the fixed end 21 of the flange 20. At least a portion of the sealing body 31 is received in the second receiving groove 13. Correspondingly, the orifice 111 is also provided at the bottom of the second receiving groove 13. By providing the second receiving groove 13, on the one hand, the sealing body 31 can be positioned by the groove wall surface of the second receiving groove 13, which not only improves the installation efficiency of the sealing body 31, but also avoids relative movement or misalignment of the sealing body 31, ensuring a good sealing effect. On the other hand, by accommodating the sealing body 31 by the second receiving groove 13, the external space required by the sealing body 31 can be reduced to a certain extent, improving space utilization.

[0094] For example, refer to Figure 18 As shown, a first receiving groove 12 and a second receiving groove 13 are simultaneously provided on the first wall 10. Specifically, the first receiving groove 12 is provided on the first surface 101 of the first wall 10, and the fixed end 21 of the flange 20 is connected to the bottom of the first receiving groove 12. The second receiving groove 13 is provided at the bottom of the first receiving groove 12, and the second receiving groove 13 is located inside the fixed end 21 of the flange 20. The second receiving groove 13 communicates with the first receiving groove 12, and the orifice 111 is formed at the bottom of the second receiving groove 13. By simultaneously providing the first receiving groove 12 and the second receiving groove 13, the effects of both can be well combined, and the processing difficulty can be reduced when the two grooves are connected.

[0095] Reference Figures 15 to 18 As shown, in some embodiments of the battery cell of this utility model, a sealing ring 32 is provided between the sealing body 31 and the first wall 10. The sealing ring 32 is located between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20. The sealing ring 32 is prior art and usually has a certain degree of elasticity. Using the sealing body 31 and the sealing ring 32 together can ensure a good sealing effect and prevent leakage.

[0096] Furthermore, in some embodiments of the battery cell described in this utility model, the first surface 101 of the first wall 10 is provided with a first positioning groove 14, the first positioning groove 14 is located between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20, and part of the sealing ring 32 is accommodated in the first positioning groove 14.

[0097] For example, refer to Figure 19 As shown, the first positioning groove 14 is annular, and the width of the first positioning groove 14 is not less than the annular width of the sealing ring 32, so that the entire sealing ring 32 can be accommodated through the first positioning groove 14. Alternatively, refer to... Figure 20 As shown, alternatively, the width of the first positioning groove 14 is smaller than the annular width of the sealing ring 32, and the sealing ring 32 is provided with a protrusion corresponding to the first positioning groove 14, so as to cooperate with the first positioning groove 14 to achieve positioning. The protrusion can be annular, and correspondingly, the first positioning groove 14 can also be annular; or the protrusion can be block-shaped, and correspondingly, the first positioning groove 14 can also be block-shaped. In this case, multiple first positioning grooves 14 can be provided, and the multiple first positioning grooves 14 are evenly distributed around the orifice 111.

[0098] By providing the first positioning groove 14, when the sealing ring 32 needs to be used, on the one hand, the sealing ring 32 can be positioned through the first positioning groove 14, which improves the installation efficiency of the sealing ring 32 and prevents relative movement or misalignment of the sealing ring 32, ensuring a good sealing effect. On the other hand, by accommodating the sealing ring 32 through the first positioning groove 14, the space occupied by the sealing ring 32 can be reduced to a certain extent, improving space utilization. Preferably, the diameters of both the sealing ring 32 and the first positioning groove 14 are smaller than the diameter of the sealing element, so that the sealing element can better compress the sealing ring 32 and achieve a good sealing effect.

[0099] For example, refer to Figure 21 As shown, in some embodiments of the battery cell of this utility model, a first receiving groove 12 and a first positioning groove 14 are simultaneously provided on the first wall 10. Specifically, the first receiving groove 12 is provided on the first surface 101 of the first wall 10, the fixed end 21 of the flange 20 is fixed to the bottom of the first receiving groove 12, and the first positioning groove 14 and the orifice 111 are both provided at the bottom of the first receiving groove 12. The first positioning groove 14 is located between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20. A portion of the sealing ring 32 is received in the first positioning groove 14, and the sealing ring 32 is sandwiched between the sealing body 31 and the bottom of the first receiving groove 12. The sealing body 31 is sandwiched between the sealing ring 32 and the free end 22 of the flange 20. By simultaneously providing the first receiving groove 12 and the first positioning groove 14, the effects of both can be well combined.

[0100] For example, refer to Figure 22 As shown, in some embodiments of the battery cell of this utility model, a second receiving groove 13 and a first positioning groove 14 are simultaneously provided on the first wall 10. Specifically, the fixed end 21 of the flange 20 is fixed on the first surface 101 of the first wall 10, the second receiving groove 13 is provided on the first surface 101, and the second receiving groove 13 is located inside the fixed end 21 of the flange 20. The orifice 111 and the first positioning groove 14 are both located at the bottom of the second receiving groove 13, and the first positioning groove 14 is located between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20. Part of the sealing ring 32 is received in the first positioning groove 14, and the sealing ring 32 is sandwiched between the sealing body 31 and the bottom of the first receiving groove 12, while the sealing body 31 is sandwiched between the sealing ring 32 and the free end 22 of the flange 20. By simultaneously providing the second receiving groove 13 and the first positioning groove 14, the effects of both can be well combined.

[0101] For example, refer to Figure 23 As shown, in some embodiments of the battery cell of this utility model, a first receiving groove 12, a second receiving groove 13, and a first positioning groove 14 are simultaneously provided on the first wall 10. Specifically, the first receiving groove 12 is provided on the first surface 101 of the first wall 10, and the fixed end 21 of the flange 20 is provided at the bottom of the first receiving groove 12. The second receiving groove 13 is provided at the bottom of the first receiving groove 12, and the second receiving groove 13 is located inside the fixed end 21 of the flange 20. The orifice 111 and the first positioning groove 14 are both provided at the bottom of the second receiving groove 13, and the first positioning groove 14 is located between the outer periphery of the orifice 111 and the inner side of the fixed end 21 of the flange 20. Part of the sealing ring 32 is received in the first positioning groove 14, and the sealing ring 32 is sandwiched between the sealing body 31 and the bottom of the first receiving groove 12. The sealing body 31 is sandwiched between the sealing ring 32 and the free end 22 of the flange 20 to achieve the best effect.

[0102] In some embodiments of the battery cell described in this utility model, a second positioning groove 311 is provided on the side of the sealing body 31 facing the sealing ring 32, and a portion of the sealing ring 32 is accommodated in the second positioning groove 311.

[0103] For example, refer to Figure 24 As shown, the width of the second positioning groove 311 is not less than the circumferential width of the sealing ring 32, so that the entire sealing ring 32 can be accommodated through the second positioning groove 311. Alternatively, refer to... Figure 25As shown, the width of the second positioning groove 311 is smaller than the annular width of the sealing ring 32. The sealing ring 32 is provided with a protrusion corresponding to the second positioning groove 311, so as to cooperate with the second positioning groove 311 to achieve positioning. The protrusion can be set as annular, and the corresponding second positioning groove 311 can also be set as annular; or the protrusion can be set as block-shaped, and the corresponding second positioning groove 311 can also be set as block-shaped. In this case, multiple second positioning grooves 311 can be provided, and the multiple second positioning grooves 311 are evenly distributed around the orifice 111.

[0104] By providing the second positioning groove 311, when the sealing ring 32 needs to be used, on the one hand, the sealing ring 32 can be positioned through the second positioning groove 311, which not only improves the installation efficiency of the sealing ring 32, but also prevents the sealing ring 32 from moving or misaligning, ensuring a good sealing effect. On the other hand, by accommodating the sealing ring 32 through the second positioning groove 311, the space occupied by the sealing ring 32 can be reduced to a certain extent, improving space utilization.

[0105] For example, refer to Figure 26 As shown, in some embodiments of the battery cell of this utility model, the first surface 101 of the first wall 10 is provided with a first receiving groove 12. The fixed end 21 of the flange 20 is connected to the bottom of the first receiving groove 12, and the free end 22 of each flange 20 does not protrude from the first receiving groove 12. The orifice 111 is provided at the bottom of the first receiving groove 12. A second positioning groove 311 is provided on the side of the sealing body 31 facing the sealing ring 32. Part of the sealing ring 32 is received in the second positioning groove 311, and the sealing ring 32 is sandwiched between the bottom of the first receiving groove 12 and the second positioning groove 311. The sealing body 31 is sandwiched between the sealing ring 32 and the free end 22 of the flange 20.

[0106] For example, refer to Figure 27 As shown, in some embodiments of the battery cell of this utility model, the first surface 101 of the first wall 10 is provided with a second receiving groove 13. The fixed end 21 of the flange 20 is fixed on the first surface 101, the second receiving groove 13 is provided inside the fixed end 21 of the flange 20, and the orifice 111 is provided at the bottom of the second receiving groove 13. A second positioning groove 311 is provided on the side of the sealing body 31 facing the sealing ring 32. Part of the sealing ring 32 is received in the second positioning groove 311, and the sealing ring 32 is sandwiched between the bottom of the second receiving groove 13 and the second positioning groove 311. The sealing body 31 is sandwiched between the sealing ring 32 and the free end 22 of the flange 20.

[0107] For example, refer to Figure 28As shown, in some embodiments of the battery cell of this utility model, a first receiving groove 12 is disposed on the first surface 101 of the first wall 10, and the fixed end 21 of the flange 20 is connected to the bottom of the first receiving groove 12. A second receiving groove 13 is disposed at the bottom of the first receiving groove 12, and the second receiving groove 13 is disposed inside the fixed end 21 of the flange 20. The second receiving groove 13 communicates with the first receiving groove 12, and an opening 111 is formed at the bottom of the second receiving groove 13. A second positioning groove 311 is provided on the side of the sealing body 31 facing the sealing ring 32. Part of the sealing ring 32 is accommodated in the second positioning groove 311, and the sealing ring 32 is sandwiched between the bottom of the second receiving groove 13 and the second positioning groove 311. The sealing body 31 is sandwiched between the sealing ring 32 and the free end 22 of the flange 20.

[0108] It should be noted that in some embodiments, the first positioning groove 14 and the second positioning groove 311 can be provided simultaneously to achieve positioning of the sealing ring 32. Preferably, only one of the first positioning groove 14 and the second positioning groove 311 is provided to facilitate rapid assembly.

[0109] Those skilled in the art can configure the connection method between the flange 20 and the first wall 10 according to actual needs. In some embodiments, the fixed end 21 of each flange 20 is connected to the first wall 10. This can be understood as the fixed end 21 of the flange 20 being welded to the first wall 10, or the fixed end 21 of the flange 20 being integrally formed with the first wall 10 to ensure strength. It can also be understood that the fixed ends 21 of multiple flanges 20 are connected to form a ring structure, which is welded to or integrally formed with the first wall 10.

[0110] Reference Figure 14 As shown, in some embodiments of the battery cell of this utility model, the abutment portions 24 of multiple flanges 20 are evenly distributed along the circumference of the opening 111. By setting the flanges 20 to be evenly distributed, the flanges 20 can provide a more uniform riveting force to the sealing body 31 after bending, thereby ensuring a good sealing effect. Preferably, after bending, the interval L between the abutment portions 24 of two adjacent flanges 20 satisfies the relationship 0≤L≤D1 / 10. Wherein, the inner edges of the fixed ends 21 of multiple flanges 20 form a circular outline, and D1 is the diameter of the circular outline. When the gap L between the abutment portions 24 of two adjacent flanges 20 is less than D1 / 10, the sealing effect is better. Specifically, 0≤L≤D1 / 12, 0≤L≤D1 / 14, or 0≤L≤D1 / 18 can also be designed.

[0111] Reference Figure 13 and Figure 14As shown, in some embodiments of the battery cell of this invention, the cross-sectional area of ​​the flange 20 gradually decreases along the extension direction from the fixed end 21 to the free end 22. By setting the flange 20 to a tapered shape, on the one hand, it can avoid the flanges 20 overlapping each other after bending, thus improving space utilization. On the other hand, it can also ensure the limiting and fixing effect of the flange 20 on the sealing body 31, making the riveting force uniform and the sealing effect good.

[0112] Working principle:

[0113] Taking the target through hole 11 as the injection hole as an example, after the injection is completed, firstly, the sealing ring 32 is placed in the first positioning groove 14 to achieve positioning. Next, the sealing body 31 is placed in the second receiving groove 13 and covered on the sealing ring 32. Finally, pressure is applied to the flange 20 to bend it until the free end 22 of the flange 20 abuts against the sealing body 31, thus completing the seal.

[0114] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0115] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0116] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A press-fit structure, characterized in that, include: First wall (10); A target through hole (11) is provided in the first wall (10), and the target through hole (11) includes an opening (111). A flange (20) is provided in multiple ways. Each flange (20) includes a fixed end (21) and a free end (22). The fixed end (21) of each flange (20) is connected to the first wall (10). At least a portion of the flanges (20) are arranged around the opening (111).

2. The press-fit structure according to claim 1, characterized in that: The first wall (10) is provided with a first receiving groove (12); the fixed end (21) of each flange (20) is connected to the bottom of the first receiving groove (12); And / or, the first wall (10) and the inner side of the fixed end (21) of the flange (20) are provided with a second receiving groove (13), the orifice (111) is formed at the bottom of the second receiving groove (13), and the second receiving groove (13) is configured to receive at least part of the sealing body (31). And / or, the first wall (10) is provided with a first positioning groove (14), the first positioning groove (14) being located between the outer periphery of the orifice (111) and the inner side of the fixed end (21) of the flange (20), the first positioning groove (14) being configured to accommodate the sealing ring (32) of the portion.

3. The press-fit structure according to claim 1, characterized in that: The flange (20) is integrally formed with the first wall (10); Alternatively, the fixed end (21) is welded to the first wall (10).

4. The press-fit structure according to claim 1, characterized in that: The cross-sectional area of ​​the flange (20) gradually decreases from the fixed end (21) to the free end (22) of the flange (20).

5. The press-fit structure according to claim 1, characterized in that: The plurality of flanges (20) are distributed at equal intervals along the circumference of the opening (111).

6. A single battery cell, characterized in that, include: First wall (10); The target through hole (11) is disposed on the first wall (10) and the target through hole (11) includes an opening (111). A flange (20) is provided in multiple ways, each flange (20) including a fixed end (21) and a free end (22), the fixed end (21) of each flange (20) being connected to the first wall (10); among the multiple flanges (20), at least a portion of the flanges (20) are provided around the opening (111); A sealing body (31) covers the orifice (111); the sealing body (31) is positioned between the first wall (10) and the free end (22) of the flange (20).

7. The battery cell according to claim 6, characterized in that: The first wall (10) is provided with a first receiving groove (12); the fixed end (21) of each flange (20) is connected to the bottom of the first receiving groove (12), and the free end (22) of each flange (20) does not protrude from the first receiving groove (12). And / or, the first wall (10) and the inner side of the fixed end (21) of the flange (20) are provided with a second receiving groove (13), the orifice (111) is formed at the bottom of the second receiving groove (13), and at least a portion of the sealing body (31) is received in the second receiving groove (13).

8. The battery cell according to claim 6 or 7, characterized in that: A sealing ring (32) is provided between the sealing body (31) and the first wall (10). The first wall (10) is provided with a first positioning groove (14). The first positioning groove (14) is located between the outer periphery of the orifice (111) and the inner side of the fixed end (21) of the flange (20). A portion of the sealing ring (32) is accommodated in the first positioning groove (14).

9. The battery cell according to claim 6 or 7, characterized in that: A sealing ring (32) is provided between the sealing body (31) and the first wall (10), and the sealing ring (32) is located between the outer periphery of the orifice (111) and the inner side of the fixed end (21) of the flange (20).

10. The battery cell according to claim 9, characterized in that: The sealing body (31) has a second positioning groove (311) on the side facing the sealing ring (32), and a portion of the sealing ring (32) is accommodated in the second positioning groove (311).

11. The battery cell according to claim 6, characterized in that: The flange (20) is integrally formed with the first wall (10); Alternatively, the fixed end (21) is welded to the first wall (10).

12. The battery cell according to claim 6, characterized in that: Each of the flanges (20) includes a bend (23) and an abutment (24) connected in sequence, with the end of the abutment (24) away from the bend (23) being the free end (22); the sealing body (31) is confined between the first wall (10) and the abutment (24) of the flange (20).

13. The battery cell according to claim 12, characterized in that: The abutting portions (24) of the plurality of flanges (20) are all equally spaced along the circumference of the opening (111).

14. The battery cell according to claim 12, characterized in that: In the extension direction from the fixed end (21) to the free end (22) of the flange (20), the cross-sectional area of ​​the flange (20) gradually decreases.

Images