CN220652308U - Liquid nail structure is annotated to battery cover plate subassembly - Google Patents
Liquid nail structure is annotated to battery cover plate subassembly Download PDFInfo
- Publication number
- CN220652308U CN220652308U CN202322254917.1U CN202322254917U CN220652308U CN 220652308 U CN220652308 U CN 220652308U CN 202322254917 U CN202322254917 U CN 202322254917U CN 220652308 U CN220652308 U CN 220652308U
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- CN
- China
- Prior art keywords
- liquid injection
- cover plate
- liquid
- nail
- hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 title claims abstract description 92
- 238000002347 injection Methods 0.000 claims abstract description 71
- 239000007924 injection Substances 0.000 claims abstract description 71
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000003466 welding Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a liquid injection nail structure of a battery cover plate assembly, which comprises a cover plate assembly and a liquid injection nail, wherein the cover plate assembly comprises a pole, a liquid injection hole is formed in the middle of the pole, a sealing ring is arranged at the bottom of the liquid injection hole, the liquid injection nail is inserted into the liquid injection hole and is in interference fit with the liquid injection hole, the upper end face is flush with the upper end face of the pole, the lower end face is pressed on the sealing ring through external pressure, the sealing ring is normally compressed and deformed to expand the inner side wall of the liquid injection hole, and the joint of the outer round edge of the upper end face of the liquid injection nail and the hole opening at the upper end of the liquid injection hole is welded by laser for one circle to form a weld joint seal. According to the utility model, the O-shaped sealing ring is arranged at the bottom of the liquid injection hole to form a first mechanical seal, the liquid injection nail and the liquid injection hole are in interference fit to form a second structural seal, and the joint of the liquid injection nail and the orifice of the liquid injection hole is subjected to laser welding to form a third welding seam seal, so that the sealing performance is greatly improved, the leakage risk is effectively avoided, and the safety of the battery is improved.
Description
Technical Field
The utility model relates to the technical field of cylindrical battery preparation, in particular to a battery cover plate assembly liquid injection nail structure.
Background
Lithium ion batteries are becoming more and more widely used in various fields. In the use of lithium ion battery, when the abnormal condition of weeping appears, can lead to the battery to fail to work, the short circuit of whole battery package, the outside of lithium battery can take place to warp, and the lithium battery volume can expand, appears some crackles even on the battery shell, and the air smells the pungent gas, and these pungent gases are poisonous, influence life health.
As shown in fig. 3, the upper liquid injection nail structure of the existing lithium battery cover plate component is that a layer hole 102 is arranged at the upper end of a liquid injection hole 101 in the middle of a pole, an existing liquid injection nail 4' is a circular plate with the thickness of 0.5mm, the existing liquid injection nail is installed in the layer hole 102 in a clearance fit manner, then laser welding is adopted at the joint of the orifice of the layer hole 102 and the liquid injection nail, a welding seal is formed, and the welding seam height is 0.3mm. However, the electrolyte crystallization is easily remained in the layer hole 102 and on the surface of the hole opening position when the electrolyte is injected into the battery, and the electrolyte crystallization position is easily exploded to generate cracks during laser welding, so that the battery cannot be fully sealed, more potential leakage channels exist, leakage risks exist, and the use safety of the battery is affected.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a liquid injection nail structure of a battery cover plate assembly, an O-shaped sealing ring is arranged at the bottom of a liquid injection hole to form a first mechanical seal, the liquid injection nail and the liquid injection hole form a second structural seal by interference fit, meanwhile, when the liquid injection nail is extruded into the liquid injection hole, residual electrolyte can be extruded out of an orifice and can be wiped by cloth, and the joint of the liquid injection nail and the orifice of the liquid injection hole adopts laser welding to form a third weld seal, so that the sealing performance is greatly improved, the leakage risk is effectively avoided, and the safety of a battery is improved.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a battery cover plate subassembly annotates liquid nail structure, includes cover plate subassembly and annotates liquid nail, its characterized in that: the cover plate assembly comprises a pole, from last liquid hole, transition hole and the reaming of down being equipped with in proper order in the middle of the pole, the transition hole internal diameter is less than annotates the liquid hole internal diameter, annotate liquid hole bottom and be equipped with the sealing washer, annotate the liquid nail and insert into the liquid hole, with annotate liquid hole interference fit, and up end and pole up end parallel and level, the sealing washer is located through external pressure to the lower terminal surface, the sealing washer normal compression deformation expands tightly annotates liquid hole inside wall, annotate the outer round edge of liquid nail up end and annotate liquid hole upper end aperture junction and adopt laser welding round, form the welding seam seal.
Furthermore, the lower end of the liquid injection nail is conical, the taper is set to be 5-7 degrees, and the outer circular surface of the upper end is in interference fit with the inner circular surface of the upper end of the liquid injection hole.
Further, the cover plate assembly further comprises a metal cover plate and an insulating protective rubber ring, and the metal cover plate, the pole and the insulating protective rubber ring are integrally injection molded.
Furthermore, the sealing ring is an O-shaped sealing ring made of silica gel.
The O-shaped sealing ring belongs to national standard, has low cost, stable material, holes in the middle of the O-shaped sealing ring, convenient installation, good silica gel adsorptivity, water insolubility, high heat resistance, stable chemical property and no combustion.
Compared with the prior art, the utility model has the beneficial effects that: 1. according to the utility model, the O-shaped sealing ring is arranged at the bottom of the liquid injection hole, the liquid injection nail is used for downwards extruding to generate deformation, the inner side wall of the liquid injection hole is expanded to form a first mechanical seal, the liquid injection nail and the liquid injection hole are in interference fit to form a second structural seal, meanwhile, when the liquid injection nail is extruded into the liquid injection hole, the residual electrolyte can be extruded out of the hole opening, and can be wiped by cloth, so that the quality of a welding seam can be effectively prevented from being influenced by the electrolyte, and the joint of the liquid injection nail and the hole opening of the liquid injection hole is welded by adopting laser to form a third welding seam seal, so that the sealing performance is greatly improved, the leakage risk is effectively avoided, and the safety of a battery is improved; 2. according to the utility model, the pole, the metal cover plate and the insulating protective rubber ring are integrally injection-molded and formed, so that the contact area between the pole and the insulating protective rubber ring and between the insulating protective rubber ring and the metal cover plate is more, and the sealing performance is further improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an assembly structure of an O-ring, a liquid injection nail and a cover plate assembly according to an embodiment of the utility model;
fig. 3 is a schematic diagram of a conventional battery cover plate liquid injection nail.
In the figure: 1. the device comprises a pole column, 101, a liquid injection hole, 2, a metal cover plate, 3, an insulating protective rubber ring, 4, a liquid injection nail, 5, an O-shaped sealing ring and 6, and a welding seam for sealing.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 and 2, the embodiment of the utility model comprises a cover plate component and a liquid injection nail 4, wherein the cover plate component comprises a pole 1, a liquid injection hole 101, a transition hole and a reaming are sequentially arranged in the middle of the pole 1 from top to bottom, the inner diameter of the transition hole is smaller than that of the liquid injection hole 101, an O-shaped sealing ring 5 made of silica gel is arranged at the bottom of the liquid injection hole 101, the liquid injection nail 4 is inserted into the liquid injection hole and in interference fit with the liquid injection hole 101, the upper end face is flush with the upper end face of the pole 1, the lower end face is pressed on the O-shaped sealing ring 5 through external pressure, the O-shaped sealing ring 5 is normally compressed and deformed to expand the inner side wall of the liquid injection hole 101, and the joint of the round edge outside the upper end face of the liquid injection nail 4 and the hole opening at the upper end of the liquid injection hole 101 is welded by one circle through laser, so as to form a weld seal 6.
According to the utility model, the inner side wall of the liquid injection hole 101 is expanded by the O-shaped sealing ring to form a first mechanical seal, the liquid injection nail 4 and the liquid injection hole 101 are in interference fit to form a second structural seal, meanwhile, when the liquid injection nail is extruded into the liquid injection hole, residual electrolyte can be extruded out of the hole opening and can be wiped by cloth to be removed, the electrolyte can be effectively prevented from affecting welding, the joint of the liquid injection nail 4 and the hole opening of the liquid injection hole 101 is welded by laser, a third welding seam seal 6 is formed, the sealing performance is greatly improved, the leakage risk is effectively avoided, and the safety of a battery is improved.
Further, the lower end of the liquid injection nail 4 is conical, the taper alpha is set to be 5-7 degrees, and the outer circular surface of the upper end is in interference fit with the inner circular surface of the upper end of the liquid injection hole 101.
Further, the cover plate assembly further comprises a metal cover plate 2 and an insulating protective rubber ring 3, and the metal cover plate 2, the pole 1 and the insulating protective rubber ring 3 are integrally injection molded and formed. The contact area between the pole 1 and the insulation protection rubber ring 3 and the contact area between the insulation protection rubber ring 3 and the metal cover plate 2 are more, and the sealing performance is further improved.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (4)
1. The utility model provides a battery cover plate subassembly annotates liquid nail structure, includes cover plate subassembly and annotates liquid nail, its characterized in that: the cover plate assembly comprises a pole, from last liquid hole, transition hole and the reaming of down being equipped with in proper order in the middle of the pole, the transition hole internal diameter is less than annotates the liquid hole internal diameter, annotate liquid hole bottom and be equipped with the sealing washer, annotate the liquid nail and insert into the liquid hole, with annotate liquid hole interference fit, and up end and pole up end parallel and level, the sealing washer is located through external pressure to the lower terminal surface, the sealing washer normal compression deformation expands tightly annotates liquid hole inside wall, annotate the outer round edge of liquid nail up end and annotate liquid hole upper end aperture junction and adopt laser welding round, form the welding seam seal.
2. The battery cover plate assembly liquid injection nail structure according to claim 1, wherein: the lower end of the liquid injection nail is conical, the taper is set to be 5-7 degrees, and the outer circular surface of the upper end is in interference fit with the inner circular surface of the upper end of the liquid injection hole.
3. The battery cover plate assembly liquid injection nail structure according to claim 1, wherein: the cover plate assembly further comprises a metal cover plate and an insulating protective rubber ring, and the metal cover plate, the pole and the insulating protective rubber ring are integrally injection molded.
4. The battery cover plate assembly liquid injection nail structure according to claim 1, wherein: the sealing ring is an O-shaped sealing ring made of silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322254917.1U CN220652308U (en) | 2023-08-22 | 2023-08-22 | Liquid nail structure is annotated to battery cover plate subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322254917.1U CN220652308U (en) | 2023-08-22 | 2023-08-22 | Liquid nail structure is annotated to battery cover plate subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220652308U true CN220652308U (en) | 2024-03-22 |
Family
ID=90269836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322254917.1U Active CN220652308U (en) | 2023-08-22 | 2023-08-22 | Liquid nail structure is annotated to battery cover plate subassembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220652308U (en) |
-
2023
- 2023-08-22 CN CN202322254917.1U patent/CN220652308U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |