CN117954750A - Explosion valve and sealing nail integrated sealing structure, top cover assembly and secondary battery - Google Patents
Explosion valve and sealing nail integrated sealing structure, top cover assembly and secondary battery Download PDFInfo
- Publication number
- CN117954750A CN117954750A CN202410357589.4A CN202410357589A CN117954750A CN 117954750 A CN117954750 A CN 117954750A CN 202410357589 A CN202410357589 A CN 202410357589A CN 117954750 A CN117954750 A CN 117954750A
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- CN
- China
- Prior art keywords
- sealing
- ring
- seal
- explosion
- nail
- Prior art date
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 100
- 238000004880 explosion Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000005422 blasting Methods 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 7
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention discloses an integrated sealing structure of a blasting valve and a sealing nail, a top cover assembly and a secondary battery, wherein the integrated sealing structure comprises an anti-explosion valve plate and the sealing nail; also comprises a sealing assembly; the sealing nail is provided with an axial through hole and a welding groove, the welding groove is arranged at the upper part of the through hole, and the anti-explosion valve plate is welded in the welding groove and blocks the through hole; the sealing assembly is arranged on the sealing nail and used for sealing the installation gap between the sealing nail and the liquid injection hole on the top cover plate. According to the invention, the explosion-proof valve plate is welded in the welding groove of the sealing nail, so that the sealing nail can be sealed and has a safety blasting function, the holes in the top cover sheet are reduced, and the integral strength of the top cover sheet is improved.
Description
Technical Field
The invention relates to the technical field of secondary batteries, in particular to an integrated sealing structure of a burst valve and a sealing nail, a top cover assembly and a secondary battery.
Background
In modern society, more and more electric tools and new energy vehicles are driven by power sources, and batteries are widely used in the electric tools and the new energy vehicles due to their excellent characteristics such as high capacity and high safety. These batteries should have good safety in addition to high capacity to meet the standards of use and to meet the needs of people.
Secondary batteries generally include a battery cell, a battery case accommodating the battery cell, a top cap assembly sealingly mounted on the battery case, and an electrolyte poured into the battery case. The top cover assembly is generally composed of a top cover plate, a positive pole, a negative pole and the like, an electrolyte injection hole is formed in the top cover plate for injecting electrolyte into the battery shell, an explosion-proof valve is arranged on the top cover of the battery for guaranteeing the safety of the battery, abnormality occurs in the battery, the temperature rises, a large amount of gas generated in the battery can cause the explosion-proof valve to burst, so that the gas in the battery is discharged, and the aim of pressure relief is fulfilled.
However, the overall strength of the top cover sheet can be reduced by arranging the liquid injection hole and the explosion-proof valve liquid injection hole, so that the top cover sheet is easy to deform in the use process, and the battery is invalid.
Disclosure of Invention
The invention aims to solve the problems that: the utility model provides a blasting valve and sealing nail integral type seal structure, top cap subassembly and secondary cell through with the welding of explosion-proof valve block in the welding groove of sealing nail, still possess the safe blasting function when can sealing, reduced the trompil on the top cap piece, promoted the bulk strength of top cap piece.
The technical scheme provided by the invention for solving the problems is as follows: an integrated sealing structure of a blasting valve and a sealing nail comprises an anti-explosion valve plate and the sealing nail; also comprises a sealing assembly; the sealing nail is provided with an axial through hole and a welding groove, the welding groove is arranged at the upper part of the through hole, and the anti-explosion valve plate is welded in the welding groove and blocks the through hole; the sealing assembly is arranged on the sealing nail and used for sealing the installation gap between the sealing nail and the liquid injection hole on the top cover plate.
Preferably, the seal assembly comprises a seal ring, a drive ring and a squeeze ring; the sealing ring is used for sealing an installation gap between the sealing nail and the liquid injection hole on the top cover plate, the driving ring is made of a thermally-induced telescopic material, when the temperature in the battery rises to reach the deformation temperature of the thermally-induced telescopic material, the driving ring deforms to drive the extrusion ring to extrude the sealing ring, and therefore the sealing effect of the sealing ring is improved.
Preferably, the sealing nail is provided with a first annular installation cavity for installing a sealing ring and a second annular installation cavity for installing a driving ring, the first annular installation cavity is communicated with the second annular installation cavity through a third annular installation cavity, and the extrusion ring is installed in the third annular installation cavity.
Preferably, one side of the extrusion ring, which is away from the sealing ring, is provided with a first inclined surface, and the end surface of the annular mounting cavity III, which is matched with the first inclined surface, is provided with a second inclined surface.
Preferably, the thermally-induced telescopic material is a titanium alloy memory material, and the axial deformation lengths of the driving ring are different under different temperature conditions.
Preferably, the first notch ring and the second notch ring are arranged on the anti-explosion valve plate, and the first notch ring and the second notch ring are respectively arranged on the upper end face and the lower end face of the anti-explosion valve plate.
Preferably, the battery also comprises an explosion-proof safety component, when the temperature in the battery rises to a set value, the explosion-proof safety component pushes the nick ring open so that the air pressure in the battery can be released.
Preferably, the explosion-proof safety component comprises an ejector ring, the ejector ring is arranged in the through hole, the lower end face of the ejector ring is in contact with the upper end face of the driving ring, and the upper end face of the ejector ring corresponds to the first notch ring.
The invention also discloses a top cover assembly, which comprises the integrated sealing structure of the explosion valve and the sealing nail.
The invention also discloses a secondary battery comprising the top cover assembly.
Compared with the prior art, the invention has the advantages that: according to the invention, the explosion-proof valve plate is welded in the welding groove of the sealing nail, so that the sealing nail can be sealed and has a safety blasting function, the holes in the top cover sheet are reduced, and the integral strength of the top cover sheet is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged schematic view at A in FIG. 2;
fig. 4 is an enlarged schematic view at B in fig. 3.
The drawings are marked: 1. the sealing device comprises a liquid injection hole 2, a top cover plate 3, sealing nails 4, a welding groove 5, an anti-explosion valve plate 6, a sealing ring 7, a squeezing ring 8, a driving ring 9, a through hole 10, a first scoring ring 11, a second scoring ring 12, a third annular mounting cavity 13, a second annular mounting cavity 14 and a top open ring.
Detailed Description
The following detailed description of embodiments of the present invention will be given with reference to the accompanying drawings and examples, by which the implementation process of how the present invention can be applied to solve the technical problems and achieve the technical effects can be fully understood and implemented.
Example 1
An integrated sealing structure of a blasting valve and a sealing nail comprises an anti-explosion valve plate 5 and the sealing nail 3; also comprises a sealing assembly; the sealing nail 3 is provided with an axial through hole 9 and a welding groove 4, the welding groove 4 is arranged at the upper part of the through hole 9, and the anti-explosion valve plate 5 is welded in the welding groove 4 and blocks the through hole 9; the sealing assembly is arranged on the sealing nail 3 for sealing the mounting gap between the sealing nail 3 and the liquid injection hole 1 on the top cover sheet 2.
In the scheme, through with the welding of the explosion-proof valve block 5 in the welding groove 4 of sealing nail 3, still possess the safe blasting function when can seal, reduced the trompil on top cap piece 2, promoted the bulk strength of top cap piece 2.
In this embodiment, in particular, the sealing assembly comprises a sealing ring 6, a driving ring 8 and a pressing ring 7; the sealing ring 6 is used for sealing an installation gap between the sealing nail 3 and the liquid injection hole 1 on the top cover plate 2, the driving ring 8 is made of a thermally-induced telescopic material, when the temperature in the battery rises to reach the deformation temperature of the thermally-induced telescopic material, the driving ring 8 deforms to drive the extrusion ring 7 to extrude the sealing ring 6, and therefore the sealing effect of the sealing ring 6 is improved. After the sealing nails 3 are arranged in the liquid injection holes 1, the contact surfaces of the nail caps and the top cover sheets 2 of the sealing nails 3 are welded, so that the sealing nails 3 are fixed; further, an annular mounting cavity I for mounting the sealing ring 6 and an annular mounting cavity II for mounting the driving ring 8 are arranged on the sealing nail 3, the annular mounting cavity I and the annular mounting cavity II are communicated through an annular mounting cavity III 12, and the extrusion ring 7 is mounted in the annular mounting cavity III 12; furthermore, an inclined plane I is arranged on one side, away from the sealing ring 6, of the extrusion ring 7, and an inclined plane II is arranged on the end face, matched with the inclined plane I, of the annular mounting cavity III 12.
In this embodiment, it should be noted that, the extrusion ring 7 is made of a flexible material, when the driving ring 8 extrudes the extrusion ring 7, the extrusion ring 7 will deform radially, and the thermally-induced telescopic material is a titanium alloy memory material, and the axial deformation lengths of the driving ring 8 are different under different temperature conditions.
In the above scheme, when the internal temperature of the battery rises to reach the deformation temperature of the heat-induced telescopic material, the driving ring 88 axially deforms to drive the extrusion ring 77 to extrude the sealing ring 66, so that the sealing effect of the sealing ring 66 is improved, and the axial deformation lengths of the driving ring 88 are different under different temperature conditions, so that the structure can adjust the sealing effect according to the difference of the internal temperature of the battery, and simultaneously prevent the sealing ring 6 from being in great deformation for a long time and fatigue failure.
Specifically, the first notch ring 10 and the second notch ring 11 are arranged on the anti-explosion valve plate 5, and the first notch ring 10 and the second notch ring 11 are respectively arranged on the upper end face and the lower end face of the anti-explosion valve plate 5. Further, in this embodiment, the integrated sealing structure further includes an explosion-proof safety component, and when the temperature in the battery rises to the set value, the explosion-proof safety component pushes the first score ring 10 open so that the air pressure in the battery can be released. The explosion-proof safety assembly comprises an ejector ring 14, wherein the ejector ring 14 is arranged in the through hole 9, the lower end face of the ejector ring 14 is in contact with the upper end face of the driving ring 8, and the upper end face of the ejector ring 14 corresponds to the first notch ring 10.
Through setting up nick circle one 10 and nick circle two 11 on the surface of explosion-proof valve block 5, when battery internal pressure risees sharply, explosion-proof valve block 5 central point puts and begins to bulge and warp, when warp to a certain extent, explosion-proof valve block 5 can explode along nick circle one 10 and nick circle two 11, make the inside atmospheric pressure of battery release, because operational environment or the problem of machining precision, the circumstances that can appear inefficacy of two nick circles, namely rise to the setting value when battery internal temperature rising pressure, two nick circles can not explode smoothly, in the above-mentioned scheme, when battery internal temperature reaches the setting value, corresponding axial deformation takes place for actuating ring 8, drive top open loop 14 upward movement and prop up nick circle one 10, the gas can obtain timely leakage, holistic security has been promoted. The scheme can also make the explosion-proof valve block 5 timely burst to release pressure when two nick rings fail while achieving the sealing effect of the adjusting sealing ring 6 through the driving ring 8.
Example 2
The embodiment discloses a top cover assembly, which comprises the explosion valve and sealing nail integrated sealing structure as in the embodiment 1; it should be noted that, the rest of the structural components of the top cover assembly belong to the prior art, and those skilled in the art can design according to the needs, and in this embodiment, the description is omitted.
Example 3
The present embodiment discloses a secondary battery including a top cap assembly as described in embodiment 2; in this embodiment, it should be noted that, the remaining structural components of the secondary battery in this embodiment belong to the prior art, and those skilled in the art can design the secondary battery according to needs, which will not be described in detail in this embodiment.
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. An integrated sealing structure of a blasting valve and a sealing nail comprises an anti-explosion valve plate (5) and the sealing nail (3); the method is characterized in that: also comprises a sealing assembly; the sealing nail (3) is provided with an axial through hole (9) and a welding groove (4), the welding groove (4) is arranged at the upper part of the through hole (9), and the anti-explosion valve plate (5) is welded in the welding groove (4) and blocks the through hole (9); the sealing assembly is arranged on the sealing nail (3) and is used for sealing an installation gap between the sealing nail (3) and the liquid injection hole (1) on the top cover sheet (2).
2. The integrated burst valve and seal spike seal of claim 1 wherein: the sealing assembly comprises a sealing ring (6), a driving ring (8) and an extrusion ring (7); the sealing ring (6) is used for sealing an installation gap between the sealing nail (3) and the liquid injection hole (1) on the top cover sheet (2), the driving ring (8) is made of a thermally-induced telescopic material, when the temperature in the battery rises to reach the deformation temperature of the thermally-induced telescopic material, the driving ring (8) deforms to drive the extrusion ring (7) to extrude the sealing ring (6), and therefore the sealing effect of the sealing ring (6) is improved.
3. The integrated burst valve and seal spike seal of claim 2 wherein: the sealing nail (3) is provided with a first annular installation cavity for installing a sealing ring (6) and a second annular installation cavity (13) for installing a driving ring (8), the first annular installation cavity is communicated with the second annular installation cavity (13) through a third annular installation cavity (12), and the extrusion ring (7) is installed in the third annular installation cavity (12).
4. A blast valve and seal spike integrated seal structure according to claim 3, wherein: one side of the extrusion ring (7) deviating from the sealing ring (6) is provided with a first inclined plane, and the end surface of the annular mounting cavity III (12) matched with the first inclined plane is provided with a second inclined plane.
5. The integrated burst valve and seal spike seal of claim 2 wherein: the thermally-induced telescopic material is a titanium alloy memory material, and the axial deformation lengths of the driving ring (8) are different under different temperature conditions.
6. The integrated burst valve and seal spike seal of claim 2 wherein: the anti-explosion valve plate (5) is provided with a first notch ring (10) and a second notch ring (11), and the first notch ring (10) and the second notch ring (11) are respectively arranged on the upper end face and the lower end face of the anti-explosion valve plate (5).
7. The integrated burst valve and seal spike seal of claim 6 wherein: the battery also comprises an explosion-proof safety component, when the temperature in the battery is increased to a set value, the explosion-proof safety component pushes the first nick ring (10) open so that the air pressure in the battery is released.
8. The integrated burst valve and seal spike seal of claim 7 wherein: the explosion-proof safety component comprises a jacking open ring (14), wherein the jacking open ring (14) is arranged in the through hole (9) and the lower end face of the jacking open ring is in contact with the upper end face of the driving ring (8), and the upper end face of the jacking open ring (14) corresponds to the first notch ring (10).
9. A top cap subassembly, characterized in that: an integrated burst valve and seal spike seal comprising the device of any one of claims 1-8.
10. A secondary battery characterized in that: comprising a cap assembly according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410357589.4A CN117954750B (en) | 2024-03-27 | Explosion valve and sealing nail integrated sealing structure, top cover assembly and secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410357589.4A CN117954750B (en) | 2024-03-27 | Explosion valve and sealing nail integrated sealing structure, top cover assembly and secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117954750A true CN117954750A (en) | 2024-04-30 |
| CN117954750B CN117954750B (en) | 2024-05-31 |
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