Cylindrical cover plate and cover plate sealing nail
By changing the liquid injection hole of the lithium battery cover to an angled structure and using an angled countersunk platform and a sealed explosion-proof valve pin, the problems of dead corners and poor welding of the lithium battery cover in laser cleaning were solved, achieving convenient installation and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-03-24
AI Technical Summary
The existing lithium battery cover has a right-angled liquid injection hole, which leads to incomplete laser cleaning, resulting in pinholes and bursts. The assembly requires high precision and is prone to misalignment and missing nails, increasing production costs and wasting resources.
The injection hole was modified to a 10-20° angled structure, and an angled countersunk platform and a sealing explosion-proof valve pin were used to achieve a sealed connection through interference fit, avoiding dead corners in laser cleaning and poor welding.
It effectively solves the problem of dead corners in laser cleaning, avoids pinholes and burst points, is easy to install, reduces misalignment and nail falling, and improves production efficiency and product quality.
Smart Images
Figure CN224036484U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to lithium ion battery cover plate and sealed anti -explosion valve peg technical field, concretely relates to a cylindrical cover plate and cover plate sealing peg. BACKGROUND
[0002] The general cylindrical lithium battery cover plate's injection hole is the right angle small through -hole that is directly processed on the cover plate main body, when battery cover plate and battery shell are assembled, through the right angle small through -hole on the cover plate, electrolyte is injected into the battery, after injection, a metal sealing element (sealing peg) covers the injection hole, then the sealing peg and the battery cover plate are welded into an integral whole by laser welding, when injecting, electrolyte often remains around the injection hole of the cover plate, since the injection hole is the right angle structure, the laser emission path is also close to 90 vertical downward, can cause the dead angle that exists in the light cleaning, often there is the problem of not clean by laser cleaning, when the sealing peg is assembled on the injection hole, the lower surface of the sealing peg contacts the electrolyte remaining around the injection port, when laser welding, the welding part of the upper end periphery part of the sealing peg and the injection hole is easy to produce pinhole, explosion point and other problems, causes the battery scrap rate to be higher, increases the production cost, brings the resource waste, the right angle structure of injection hole and the high assembly precision requirement of sealing peg, the assembly exists very small deviation, will cause the sealing peg skew and the peg problem of falling, leads to the battery welding scrap, therefore, it is very necessary to provide a kind of cylindrical cover plate and cover plate sealing peg with reasonable structure, effectively solve the problem of laser cleaning dead angle, avoid pinhole and explosion point problem, installation is convenient, effectively reduce skew and peg problem. SUMMARY
[0003] The utility model aims at overcoming the insufficient of prior art, and provides a kind of cylindrical cover plate and cover plate sealing peg with reasonable structure, effectively solve the problem of laser cleaning dead angle, avoid pinhole and explosion point problem, installation is convenient, effectively reduce skew and peg problem.
[0004] The utility model aims at overcoming the insufficient of prior art, and provides a kind of cylindrical cover plate and cover plate sealing peg with reasonable structure, effectively solve the problem of laser cleaning dead angle, avoid pinhole and explosion point problem, installation is convenient, effectively reduce skew and peg problem.
[0005] The side surface and bottom surface of the bevel sink are in bevel state.
[0006] The bevel of the side surface and bottom surface of the bevel sink is 10-20 ℃.
[0007] The middle part of the upper surface of the battery cover plate is provided with an insulating sheet, the top surface of the insulating sheet is provided with a pole, and the pole is riveted to the insulating sheet by a rivet.
[0008] A cover plate sealing nail is used for interference fit sealing connection with the cylindrical cover plate, avoiding the risk of liquid leakage.
[0009] A cover plate sealing nail comprises a sealing anti-explosion valve nail, the sealing anti-explosion valve nail comprises a nail cap, a first connecting body and a second connecting body are sequentially arranged below the nail cap, and a nail body is arranged below the second connecting body.
[0010] The first connecting body and the second connecting body are both inclined angle structures, and the first connecting body and the second connecting body are in interference fit sealing connection with the inclined angle counter sink; and the nail body is in interference fit sealing connection with the hole channel.
[0011] The cover plate and the cover plate sealing nail have the advantages that the battery cover plate injection hole and the sealing anti-explosion valve nail are changed from a right angle structure to an inclined angle structure of 10-20 DEG C, the problem of laser cleaning dead angle is effectively solved, and the problems of pinholes and explosion points caused by incomplete cleaning of the injection hole electrolyte during welding are avoided; when the battery cover plate injection hole and the sealing anti-explosion valve nail are changed to an inclined angle structure, the battery cover plate injection hole and the sealing anti-explosion valve nail are more easily slid downward under the action of downward pressure when there is a small amount of deviation in assembly, and finally assembled in place, thereby effectively reducing the problems of assembly deviation and nail dropping of the sealing anti-explosion valve nail; and the cover plate and the cover plate sealing nail have the advantages of reasonable structure, effective solution to the problem of laser cleaning dead angle, avoidance of the problems of pinholes and explosion points, convenient installation, and effective reduction of the problems of deviation and nail dropping. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is a cover plate assembly and sealing nail assembly drawing of the utility model.
[0013] Fig. 2 It is a cover plate injection hole structure sectional view of the utility model.
[0014] Fig. 3 It is a sealing nail structure sectional view of the utility model.
[0015] In the drawing: 1, injection hole 11, assembly counter sink 12, inclined angle counter sink 13, hole channel 2, sealing anti-explosion valve nail 21, nail cap 22, first connecting body 23, second connecting body 24, nail body 3, insulating sheet 4, pole 5, rivet 6, battery cover plate. DETAILED DESCRIPTION
[0016] The utility model will be further described in combination with the drawings. EMBODIMENT
[0017] As Figs. 1-3As shown, a cylindrical cover plate and cover plate sealing nail, including battery cover plate 6, the upper surface of the battery cover plate 6 is internally provided with a through-hole 1, the through-hole 1 includes an assembly sink 11, the lower side of the assembly sink 11 is provided with an inclined angle sink 12, the lower side of the inclined angle sink 12 is provided with a hole 13 which extends to the inside of the battery cover plate 6.
[0018] The inclined angle sink 12 is inclined to the bottom surface.
[0019] The inclined angle of the inclined angle sink 12 is 10-20℃.
[0020] The upper surface of the battery cover plate 1 is provided with an insulating sheet 3, the top surface of the insulating sheet 3 is provided with a pole 4, and the pole 4 is riveted with the insulating sheet 3 by a rivet 5.
[0021] The utility model relates to a kind of lithium battery cover plate, the sealing nail of cover plate cooperates welding, in use, the utility model is improved by the structure of through-hole 1, battery cover plate through-hole 1 and sealing anti-explosion valve nail 2 are changed from right angle structure to 10-20℃ inclined angle structure, effectively solve the problem of laser cleaning dead angle, avoid the pinhole and explosion point problem caused by through-hole 1 electrolyte cleaning not clean welding;The utility model changes battery cover plate through-hole 1 and sealing anti-explosion valve nail 2 to inclined angle structure, when there is a small amount of deviation in through-hole 1 and sealing anti-explosion valve nail 2 assembly, it is also easier to slide downward under the action of down pressure, finally assemble in place, effectively reduce the sealing anti-explosion valve nail 2 assembly skew and drop nail problem;The utility model has the advantages of reasonable structure, effectively solve the problem of laser cleaning dead angle, avoid pinhole and explosion point problem, installation is convenient, effectively reduce skew and drop nail problem. Embodiment
[0022] As Figs. 1-3 As shown, a cover plate sealing nail is used for interference fit sealing connection with the cylindrical cover plate as described above, to avoid the risk of liquid leakage.
[0023] A cover plate sealing nail includes a sealing anti-explosion valve nail 2, which includes a nail cap 21, a first connecting body 22 and a second connecting body 23 are sequentially arranged below the nail cap 21, and a nail body 24 is arranged below the second connecting body 23.
[0024] The nail cap is assembled and connected with the assembly sink; the first connecting body 22 and the second connecting body 23 are both inclined angle structures, and the first connecting body 22 and the second connecting body 23 are interference fit sealing connected with the inclined angle sink 12; the nail body 24 is interference fit sealing connected with the hole 13.
[0025] The utility model relates to a cylindrical cover plate and cover plate sealing nail, relate to the sealing nail cooperation welding of lithium battery cover plate, in use, the utility model discloses the structure of liquid injection hole 1 is improved, changes the inclined angle structure of 10-20 DEG C from the right angle structure of battery cover plate liquid injection hole 1 and sealed anti -explosion valve nail 2, can effectively solve the problem of laser cleaning dead angle, avoids the pinhole and the problem of burst point because the liquid injection hole 1 electrolyte cleaning is not clean and leads to welding, the utility model changes the inclined angle structure of battery cover plate liquid injection hole 1 and sealed anti -explosion valve nail 2, when the assembly of liquid injection hole 1 and sealed anti -explosion valve nail 2 exists a little deviation, under the action of the pressure of down pressure, also more easily slide down, finally assemble in place, effectively reduce the problem of sealed anti -explosion valve nail 2 assembly skew and drop nail, the utility model has the advantages of reasonable structure, effectively solve the problem of laser cleaning dead angle, avoid the pinhole and the problem of burst point, convenient installation, effectively reduce the advantages such as skew and drop nail problem.
Claims
1. A cylindrical cover plate comprising a battery cover plate, characterized by: The upper surface of the battery cover plate is internally provided with a liquid injection hole penetrating through the battery cover plate, the liquid injection hole comprises an assembly sink, the lower side of the assembly sink is provided with an inclined angle sink, and the lower side of the inclined angle sink is provided with a hole penetrating through the battery cover plate and extending into the battery cover plate.
2. A cylindrical cover plate according to claim 1, characterized in that: The side surface and the bottom surface of the inclined angle sink are in an inclined angle state.
3. A cylindrical cover plate according to claim 2, wherein: The inclined angle of the side surface and the bottom surface of the inclined angle sink is 10-20℃.
4. A cylindrical cover plate according to claim 1, characterized in that: The upper surface of the battery cover plate is provided with an insulating sheet in the middle, the top surface of the insulating sheet is provided with a pole, and the pole is riveted to the insulating sheet by a rivet.
5. A blind rivet characterized by: The cover plate sealing nail is used for interference fit sealing connection with the cylindrical cover plate according to any one of claims 1-4, so as to avoid the risk of liquid leakage.
6. A blind rivet according to claim 5, wherein: The sealing anti-explosion valve nail comprises a nail cap, a first connecting body and a second connecting body are sequentially arranged below the nail cap, and a nail body is arranged below the second connecting body.
7. A blind rivet according to claim 6, wherein: The first connecting body and the second connecting body are both inclined angle structures, and the first connecting body and the second connecting body are in interference fit sealing connection with the inclined angle sink; and the nail body is in interference fit sealing connection with the hole.