Novel liquid injection aluminum nail structure
By designing an anti-crack structure on the nail body of the liquid-injected aluminum nail, the problem of cracks caused by thermal expansion and contraction after laser welding of the liquid-injected aluminum nail is solved, and the welding yield and safety performance are improved, and liquid leakage is avoided.
Patent Information
- Application Number
- CN202420661894.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-04-01
AI Technical Summary
The existing liquid-injected aluminum nails are cracked due to thermal expansion and contraction after laser welding, resulting in poor sealing effect and easy liquid leakage, which poses safety hazards to the battery cell.
A new liquid-injected aluminum nail structure was designed, using a sheet-shaped nail body, with a welding area on the outer edge of the nail body and a crack-proof structure around the inner edge of the welding area. The anti-crack structure includes several annular reinforcement ribs distributed from the outside to the inside and gradually shrinking in diameter on the front and back of the inner plate. An annular groove is formed between the annular reinforcement ribs and the inner plate to enhance the strength and rigidity of the inner plate, balance stress, and prevent cracks from occurring.
By introducing anti-crack structures into the liquid-injected aluminum nails, the nail body can effectively prevent the expansion and contraction cracks from occurring after laser welding, improve the welding yield, avoid liquid leakage, enhance safety performance, and improve the efficiency of the production line.
Smart Images
Figure CN222775563U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of batteries and relates to a novel liquid-injected aluminum nail structure. Background Art
[0002] During the laser welding process of the existing liquid-injected aluminum nails with the countersunk holes on the cover plate, the temperature of the liquid-injected aluminum nails will rise after laser welding. Due to the principle of thermal expansion and contraction, the liquid-injected aluminum nails will crack, and the liquid-injected rubber nails can only play a temporary sealing role. Once cracks appear in the liquid-injected aluminum nails, it is easy to cause leakage, thereby posing a safety hazard to the battery cell. Utility Model Content
[0003] The utility model aims to solve the above problems and provides a novel liquid-injected aluminum nail structure.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A novel liquid-injected aluminum nail structure comprises a sheet-shaped nail body, a welding area is arranged on the outer edge of the nail body, and an anti-crack structure is arranged inside the welding area to prevent the nail body from generating expansion cracks after the welding area is laser-welded with a cover plate assembly.
[0006] The welding area on the outer edge of the nail body is welded to the countersunk hole on the cover plate assembly by laser welding to seal the countersunk hole. The anti-crack structure inside the welding area can prevent the nail body from generating expansion cracks after laser welding, which can effectively improve the welding yield of the nail body, improve the efficiency of the production line, avoid leakage caused by cracks in the nail body, and improve safety performance.
[0007] In the above-mentioned novel liquid-injected aluminum nail structure, the nail body includes an outer ring and an inner plate, the outer ring and the inner plate are connected as a whole, the outer ring is the welding area, and the anti-cracking structure is provided on the inner plate.
[0008] The outer ring of the nail body is welded to the countersunk hole on the cover plate assembly by laser welding, and the anti-crack structure on the inner plate can prevent the nail body from generating expansion cracks after laser welding.
[0009] In the above-mentioned new liquid-injected aluminum nail structure, the anti-cracking structure includes a plurality of annular reinforcing ribs arranged on the front and / or back surface of the inner plate, which are distributed from the outside to the inside and have gradually decreasing diameters, and an annular groove is formed between any two adjacent annular reinforcing ribs on the same surface and the inner plate.
[0010] Several annular reinforcement ribs on the front and / or back of the inner plate, which are distributed from the outside to the inside and have gradually decreasing diameters, can enhance the strength and rigidity of the front and / or back of the inner plate. The annular grooves between the annular reinforcement ribs and the inner plate can balance the stress on the front and / or back of the inner plate after the outer ring and the countersunk hole are laser welded, preventing the inner plate from cracking due to thermal expansion and contraction, effectively improving the welding yield of the nail body and avoiding leakage problems.
[0011] In the above-mentioned novel liquid-injected aluminum nail structure, the annular reinforcing rib is connected to the inner plate as a whole.
[0012] The annular reinforcement ribs are connected to the inner plate as a whole, which provides greater strength and rigidity.
[0013] In the above-mentioned novel liquid-injected aluminum nail structure, a boss is provided at the center of the front and / or back surface of the inner plate.
[0014] A boss formed by annular reinforcing ribs is provided at the center of the front and / or back surface of the inner panel, which can enhance the strength and rigidity of the front and / or back surface of the inner panel and prevent cracks in the inner panel due to thermal expansion and contraction.
[0015] In the above-mentioned novel liquid-injected aluminum nail structure, radial extension sections are provided on the front and / or back surfaces of the outer ring, and the height of the radial extension sections is adapted to the height of the annular reinforcing ribs.
[0016] The radial extension sections on the front and / or back surfaces of the outer ring are adapted to the height of the annular reinforcement ribs and are laser welded to the countersunk holes, which can increase the strength and rigidity of the outer ring, balance the stress on the outer ring, and prevent cracks in the outer ring due to thermal expansion and contraction.
[0017] In the above-mentioned novel liquid-injected aluminum nail structure, the anti-cracking structure includes a wavy inner plate, on which are provided annular wave crests and annular wave crests for forming the wave shape, and the diameters of the annular wave crests and the annular wave crests gradually decrease from the outside to the inside.
[0018] The annular wave peaks and annular wave peaks whose diameters gradually decrease from the outside to the inside form a wavy inner plate. After the wavy inner plate is laser welded to the outer ring and the countersunk hole, the stress caused by the thermal expansion and contraction of the nail body can be released, thereby effectively avoiding cracks in the nail body, effectively improving the welding yield of the nail body, and avoiding leakage problems.
[0019] In the above-mentioned novel liquid-injected aluminum nail structure, the lowest point of the bottom surface of the inner plate is higher than the bottom surface of the outer ring, forming a clearance area between the inner plate and the outer ring.
[0020] The lowest point of the bottom surface of the inner plate is higher than the bottom surface of the outer ring and a clearance area is formed between the inner plate and the outer ring, which can prevent interference between the annular wave crest and the countersunk hole.
[0021] In the above-mentioned novel liquid-injected aluminum nail structure, the outer wall of the outer ring is provided with an annular inclined surface whose diameter gradually decreases from the lower end to the upper end.
[0022] The annular inclined surface on the outer wall of the outer ring facilitates laser welding of the outer ring.
[0023] In the above-mentioned novel liquid-injected aluminum nail structure, the lower end of the annular inclined surface is flush with the outer wall of the outer ring, and an annular vertical surface is provided between the annular inclined surface and the upper end of the outer wall of the outer ring.
[0024] The annular vertical surface between the annular inclined surface and the upper end of the outer wall of the outer ring facilitates laser welding of the outer ring.
[0025] Compared with the existing technology, the advantages of the utility model are: 1. The strength and rigidity of the nail body are improved, and the stress caused by thermal expansion and contraction can be released after laser welding, and the nail body will not produce expansion cracks, the welding yield of the nail body and the efficiency of the production line are improved, and the safety performance is improved. 2. The nail body is easier to laser weld. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a top view of the cover assembly;
[0027] Figure 2 is a cross-sectional view of the nail body;
[0028] Figure 3 is a top view of the nail body;
[0029] Figure 4 is a cross-sectional view of the nail body in the second embodiment;
[0030] Figure 5 is a top view of the nail body in the second embodiment;
[0031] Figure 6 is a cross-sectional view of the nail body in the third embodiment;
[0032] Figure 7 is a top view of the nail body in the third embodiment;
[0033] Figure 8 is a cross-sectional view of a nail body in Embodiment 4;
[0034] Fig. 9 It is a top view of the nail body in the fourth embodiment.
[0035] In the figure, there are a nail body 1, a welding area 2, a cover plate assembly 3, an anti-crack structure 4, an outer ring 5, an inner plate 6, annular reinforcement ribs 7, annular grooves 8, bosses 9, radial extension sections 10, annular wave crests 11, a clearance area 12, annular inclined surfaces 13, and annular vertical surfaces 14. DETAILED DESCRIPTION
[0036] Embodiment 1
[0037] like Figure 1 and Figure 2 As shown, a new type of liquid-injected aluminum nail structure includes a sheet-shaped nail body 1, a welding area 2 is provided on the outer edge of the nail body 1, and an anti-crack structure 4 is provided inside the welding area 2 to prevent the nail body 1 from generating expansion cracks after the welding area 2 and the cover plate assembly 3 are laser welded.
[0038] In the utility model, the welding area 2 on the outer edge of the nail body 1 and the countersunk hole on the cover plate assembly 3 are welded by laser welding to seal the countersunk hole. The anti-crack structure 4 inside the welding area 2 can prevent the nail body 1 from generating expansion cracks after laser welding, which can effectively improve the welding yield of the nail body 1, improve the efficiency of the production line, avoid liquid leakage caused by cracks in the nail body 1, and improve safety performance.
[0039] Specifically, combined with Figure 2 and Figure 3 As shown, the nail body 1 includes an outer ring 5 and an inner plate 6, and the outer ring 5 and the inner plate 6 are connected as a whole. The outer ring 5 is the welding area 2, and the anti-cracking structure 4 is provided on the inner plate 6.
[0040] The outer ring 5 of the nail body 1 and the countersunk hole on the cover plate assembly 3 are welded by laser welding, and the anti-crack structure 4 on the inner plate 6 can prevent the nail body 1 from generating expansion cracks after laser welding.
[0041] Specifically, combined with Figure 2 and Figure 3 As shown, the anti-cracking structure 4 includes a plurality of annular reinforcing ribs 7 which are respectively arranged on the front and back surfaces of the inner plate 6 and are distributed from the outside to the inside and have gradually decreasing diameters. An annular groove 8 is formed between any two adjacent annular reinforcing ribs 7 and the inner plate 6 on the same surface.
[0042] A number of annular reinforcing ribs 7 on the front and back surfaces of the inner plate 6, which are distributed from the outside to the inside and have gradually decreasing diameters, can enhance the strength and rigidity of the front and back surfaces of the inner plate 6; annular grooves 8 between the annular reinforcing ribs 7 and the inner plate 6 can balance the stress on the front and back surfaces of the inner plate 6 after the outer ring 5 and the countersunk hole are laser welded, thereby preventing cracks in the inner plate 6 due to thermal expansion and contraction, and can effectively improve the welding yield of the nail body 1 and avoid leakage problems.
[0043] Specifically, combined with Figure 2 As shown, the annular reinforcement rib 7 is connected to the inner plate 6 as a whole.
[0044] The annular reinforcement rib 7 is connected to the inner plate 6 as a whole, and has greater strength and rigidity.
[0045] Specifically, combined with Figure 2 and Figure 3 As shown, bosses 9 are respectively provided at the center of the front and back surfaces of the inner plate 6 .
[0046] The central parts of the front and back surfaces of the inner panel 6 are provided with bosses 9 formed by annular reinforcing ribs 7, which can enhance the strength and rigidity of the front and back surfaces of the inner panel 6 and prevent the inner panel 6 from cracking due to thermal expansion and contraction.
[0047] Preferably, combined Figure 2 As shown, a radial extension section 10 is provided on the front and / or back surface of the outer ring 5 , and the height of the radial extension section 10 is adapted to the height of the annular reinforcement rib 7 .
[0048] The radial extension section 10 on the front and / or back surface of the outer ring 5 is adapted to the height of the annular reinforcement rib 7 and is laser welded to the countersunk hole, which can increase the strength and rigidity of the outer ring 5, balance the stress on the outer ring 5, and prevent the outer ring 5 from cracking due to thermal expansion and contraction.
[0049] Preferably, combined Figure 2 As shown, the outer wall of the outer ring 5 is provided with an annular inclined surface 13 whose diameter gradually decreases from the lower end to the upper end.
[0050] The annular inclined surface 13 on the outer wall of the outer ring 5 facilitates laser welding of the outer ring 5 .
[0051] Preferably, combined Figure 2 As shown, the lower end of the annular inclined surface 13 is flush with the outer wall of the outer ring 5 , and an annular vertical surface 14 is provided between the annular inclined surface 13 and the upper end of the outer wall of the outer ring 5 .
[0052] The annular vertical surface 14 between the annular inclined surface 13 and the upper end of the outer wall of the outer ring 5 facilitates laser welding of the outer ring 5 .
[0053] The working principle of the utility model is as follows: the welding area 2 on the outer edge of the nail body 1 and the countersunk hole on the cover plate assembly 3 are welded by laser welding to seal the countersunk hole, and the anti-crack structure 4 inside the welding area 2 can prevent the nail body 1 from generating expansion cracks after laser welding, which can effectively improve the welding yield of the nail body 1, improve the efficiency of the production line, avoid leakage caused by cracks in the nail body 1, and improve safety performance;
[0054] The outer ring 5 of the nail body 1 and the countersunk hole on the cover plate assembly 3 are welded by laser welding, and the anti-crack structure 4 on the inner plate 6 can prevent the nail body 1 from generating expansion cracks after laser welding;
[0055] A plurality of annular reinforcing ribs 7 on the front and back surfaces of the inner plate 6, which are distributed from the outside to the inside and whose diameters gradually decrease, can enhance the strength and rigidity of the front and back surfaces of the inner plate 6. The annular grooves 8 between the annular reinforcing ribs 7 and the inner plate 6 can balance the stress on the front and back surfaces of the inner plate 6 after the outer ring 5 is laser welded to the countersunk hole, thereby preventing the inner plate 6 from cracking due to thermal expansion and contraction, and can effectively improve the welding yield of the nail body 1 and avoid leakage problems.
[0056] The annular reinforcement rib 7 is connected to the inner plate 6 as a whole, and has greater strength and rigidity;
[0057] The central part of the front and back sides of the inner plate 6 is provided with a boss 9 formed by an annular reinforcing rib 7, which can enhance the strength and rigidity of the front and back sides of the inner plate 6 and prevent the inner plate 6 from cracking due to thermal expansion and contraction;
[0058] The radial extension section 10 on the front and / or back surface of the outer ring 5 is adapted to the height of the annular reinforcement rib 7 and is laser welded to the countersunk hole, which can increase the strength and rigidity of the outer ring 5, balance the stress on the outer ring 5, and prevent the outer ring 5 from cracking due to thermal expansion and contraction;
[0059] The annular inclined surface 13 on the outer wall of the outer ring 5 facilitates laser welding of the outer ring 5 ; the annular vertical surface 14 between the annular inclined surface 13 and the upper end of the outer wall of the outer ring 5 facilitates laser welding of the outer ring 5 .
[0060] Embodiment 2
[0061] like Figure 4 and Figure 5 As described above, the structure and working principle of this embodiment are basically the same as those of the first embodiment, except that the anti-cracking structure 4 includes a plurality of annular reinforcing ribs 7 which are distributed from the outside to the inside and whose diameters gradually decrease and are arranged on the front surface of the inner plate 6, and an annular groove 8 is formed between any two adjacent annular reinforcing ribs 7 and the inner plate 6; a boss 9 is provided at the center of the front surface of the inner plate 6.
[0062] A plurality of annular reinforcing ribs 7 on the front side of the inner plate 6, which are distributed from the outside to the inside and whose diameters gradually decrease, can enhance the strength and rigidity of the front side of the inner plate 6; annular grooves 8 between the annular reinforcing ribs 7 and the inner plate 6 balance the stress on the front side of the inner plate 6 when the outer ring 5 is laser welded to the countersunk hole, thereby preventing the inner plate 6 from cracking due to thermal expansion and contraction, and can effectively improve the welding yield of the nail body 1 and avoid leakage problems; a boss 9 formed by the annular reinforcing ribs 7 is provided in the center of the front side of the inner plate 6, thereby enhancing the strength and rigidity of the front side of the inner plate 6 and preventing the inner plate 6 from cracking due to thermal expansion and contraction.
[0063] Embodiment 3
[0064] like Figure 6 and Figure 7 As described above, the structure and working principle of this embodiment are basically the same as those of the first embodiment, except that the anti-cracking structure 4 includes a plurality of annular reinforcing ribs 7 which are distributed from the outside to the inside and whose diameters gradually decrease and are arranged on the reverse side of the inner plate 6, and an annular groove 8 is formed between any two adjacent annular reinforcing ribs 7 and the inner plate 6; a boss 9 is provided in the central portion of the reverse side of the inner plate 6.
[0065] A number of annular reinforcing ribs 7 on the back surface of the inner plate 6, which are distributed from the outside to the inside and have a gradually decreasing diameter, can enhance the strength and rigidity of the back surface of the inner plate 6; annular grooves 8 between the annular reinforcing ribs 7 and the inner plate 6 balance the stress on the back surface of the inner plate 6 when the outer ring 5 is laser welded to the countersunk hole, thereby preventing the inner plate 6 from cracking due to thermal expansion and contraction, and can effectively improve the welding yield of the nail body 1 and avoid leakage problems; a boss 9 formed by the annular reinforcing ribs 7 is provided in the center of the back surface of the inner plate 6, thereby enhancing the strength and rigidity of the back surface of the inner plate 6, thereby preventing the inner plate 6 from cracking due to thermal expansion and contraction.
[0066] Embodiment 4
[0067] like Figure 8 and Fig. 9 As described, the structure and working principle of this embodiment are basically the same as those of the first embodiment, except that the anti-cracking structure 4 includes a wavy inner plate 6, and the inner plate 6 is provided with annular wave peaks 11 and annular wave peaks 11 for forming a wavy shape, and the diameters of the annular wave peaks 11 and the annular wave peaks 11 gradually decrease from the outside to the inside, and the lowest point of the bottom surface of the inner plate 6 is higher than the bottom surface of the outer ring 5, forming a clearance area 12 between the inner plate 6 and the outer ring 5.
[0068] The annular wave crest 11 with a diameter gradually reduced from the outside to the inside and the annular wave crest 11 form a wavy inner plate 6. After the wavy inner plate 6 is laser welded to the outer ring 5 and the countersunk hole, the stress caused by the thermal expansion and contraction of the nail body 1 can be released, thereby effectively avoiding cracks in the nail body 1, effectively improving the welding yield of the nail body 1, and avoiding leakage problems;
[0069] The lowest point of the bottom surface of the inner plate 6 is higher than the bottom surface of the outer ring 5 and a clearance area 12 is formed between the inner plate 6 and the outer ring 5, which can prevent interference between the annular wave crest 11 and the countersunk hole.
[0070] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
[0071] Although this article uses the nail body 1, welding area 2, cover plate assembly 3, anti-crack structure 4, outer ring 5, inner plate 6, annular reinforcement rib 7, annular groove 8, boss 9, radial extension section 10, annular crest 11, give way area 12, annular inclined surface 13, annular vertical surface 14, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
Claims
1. A novel liquid-injected aluminum nail structure, comprising a sheet-shaped nail body (1), characterized in that: The nail body (1) is provided with a welding area (2) on its outer edge, and an anti-crack structure (4) is provided inside the welding area (2) to prevent the nail body (1) from generating expansion cracks after the welding area (2) and the cover plate assembly (3) are laser welded. The nail body (1) comprises an outer ring (5) and an inner plate (6), the outer ring (5) and the inner plate (6) are connected as a whole, and the anti-crack structure (4) is provided on the inner plate (6).
2. The novel liquid-injected aluminum nail structure according to claim 1 is characterized in that: The outer ring (5) is the welding area (2).
3. The novel liquid injection aluminum nail structure according to claim 2 is characterized in that: The anti-cracking structure (4) comprises a plurality of annular reinforcing ribs (7) arranged on the front and / or back surface of the inner plate (6) and distributed from the outside to the inside and with gradually decreasing diameters, and an annular groove (8) is formed between any two adjacent annular reinforcing ribs (7) on the same surface and the inner plate (6).
4. The novel liquid-injected aluminum nail structure according to claim 3 is characterized in that: The annular reinforcing rib (7) is integrally connected to the inner plate (6).
5. The novel liquid-injected aluminum nail structure according to claim 3 is characterized in that: A boss (9) is provided at the center of the front and / or back surface of the inner plate (6).
6. The novel liquid-injected aluminum nail structure according to claim 3 is characterized in that: A radial extension section (10) is provided on the front and / or back surface of the outer ring (5), and the height of the radial extension section (10) is adapted to the height of the annular reinforcing rib (7).
7. The novel liquid-injected aluminum nail structure according to claim 2 is characterized in that: The anti-cracking structure (4) comprises a wavy inner plate (6), on which an annular wave crest (11) and annular wave crest (11) for forming a wavy shape are provided, wherein the diameters of the annular wave crest (11) and the annular wave crest (11) gradually decrease from the outside to the inside.
8. The novel liquid-injected aluminum nail structure according to claim 7 is characterized in that: The lowest point of the bottom surface of the inner plate (6) is higher than the bottom surface of the outer ring (5), and a clearance area (12) is formed between the inner plate (6) and the outer ring (5).
9. The novel liquid injection aluminum nail structure according to any one of claims 2 to 8, characterized in that: The outer wall of the outer ring (5) is provided with an annular inclined surface (13) whose diameter gradually decreases from the lower end to the upper end.
10. The novel liquid-injected aluminum nail structure according to claim 9 is characterized in that: The lower end of the annular inclined surface (13) is flush with the outer wall of the outer ring (5), and an annular vertical surface (14) is provided between the annular inclined surface (13) and the upper end of the outer wall of the outer ring (5).