CN117117405A - Cover plate and shell connecting structure easy to laser welding - Google Patents
Cover plate and shell connecting structure easy to laser welding Download PDFInfo
- Publication number
- CN117117405A CN117117405A CN202310979738.6A CN202310979738A CN117117405A CN 117117405 A CN117117405 A CN 117117405A CN 202310979738 A CN202310979738 A CN 202310979738A CN 117117405 A CN117117405 A CN 117117405A
- Authority
- CN
- China
- Prior art keywords
- apron
- aluminum
- cover plate
- shell
- terminal
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 108
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 108
- 239000004411 aluminium Substances 0.000 claims 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 abstract description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 abstract description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/155—Lids or covers characterised by the material
- H01M50/157—Inorganic material
- H01M50/159—Metals
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a cover plate and shell connecting structure easy to weld by laser, and relates to the technical field of cylindrical batteries. This easy laser welding's apron and shell connection structure includes aluminum hull and apron, aluminum hull inner wall sets up flutedly, the apron includes plastic down, circular aluminum plate, the terminal, rivet and explosion-proof valve, the terminal sets up on the apron upper surface, a plurality of rivets set up on the terminal, and run through terminal and apron, plastic down sets up in the apron lower part, circular aluminum plate sets up in plastic upside down, circular aluminum plate lower part is provided with interior round boss, and interior round boss is unanimous with the aluminum hull internal diameter, plastic lower part is provided with colludes shape structure down, mutually support with the recess, through collude the inseparable interlock of recess of shape structure and aluminum hull inner wall together, the snap force that produces causes apron and aluminum hull closely pressfitting together, the joint of apron and aluminum hull is very even inseparable, the joint can not produce hidden danger such as rosin joint, welding, the welding seam is inhomogeneous when carrying out laser welding.
Description
Technical Field
The invention belongs to the technical field of cylindrical batteries, and particularly relates to a cover plate and shell connecting structure easy to weld by laser.
Background
The cylindrical battery has the advantages of mature process, good consistency of battery cells, high grouping efficiency and good heat dissipation effect after grouping, and is widely applied to the fields of household energy storage, outdoor energy storage, industrial and commercial energy storage, communication base stations, low-speed two-wheeled vehicles, tricycles and electric vehicles. The cylindrical battery is divided into mechanical compression sealing and laser welding sealing according to the packaging mode; the steel shell cylindrical battery generally adopts a mechanical compression sealing process, and the aluminum shell cylindrical battery generally adopts a laser welding sealing process. When the cylindrical battery with the aluminum shell is sealed, the positive electrode cover plate is tightly sealed with one side of the aluminum shell, and the joint between the cover plate and the aluminum shell is welded by laser; the negative electrode cover plate is tightly sealed with the other side of the aluminum shell, and the joint of the cover plate and the aluminum shell is welded by laser; the positive electrode cover plate, the negative electrode cover plate and the aluminum shell are welded and formed, so that external air is isolated from being in contact with the inside of the cylindrical battery, and meanwhile, electrolyte leakage in the battery is avoided.
In the existing aluminum shell cylindrical battery, an aluminum shell is of a double-pass structure, and the inner wall of the aluminum shell is not provided with a groove design for an auxiliary cover plate and an end face tight sealing cover of the aluminum shell; the front surfaces of the anode cover plate and the cathode cover plate are provided with an outer circle, the back surface of the cover plate is provided with an inner circle, and the diameter of the outer circle is consistent with the outer diameter of the aluminum shell; the diameter of the inner circle is consistent with the inner diameter of the aluminum shell. When the positive electrode cover plate is covered with one side of the aluminum shell, the inner circle of the positive electrode cover plate is embedded into the aluminum shell, and the outer circle of the positive electrode cover plate is covered with the outer diameter of the aluminum shell; and welding the joint after the outer circle of the positive electrode cover plate and the outer diameter of the aluminum shell are covered by laser. When the negative electrode cover plate is covered with the other side of the aluminum shell, a joint between the outer circle of the negative electrode cover plate and the outer diameter of the aluminum shell is welded by laser.
The cover plate and the aluminum shell are tightly attached to each other by external force, and the cover plate and the aluminum shell are not tightly attached to each other due to uneven stress of the cover plate, so that gaps are generated, and hidden dangers such as fire explosion, false welding, welding leakage, uneven welding seams and the like are caused by laser welding, so that battery leakage is caused, and even the safety performance is reduced.
Aiming at the problems, we propose a cover plate and shell connecting structure easy to weld by laser.
Disclosure of Invention
(1) Technical problem to be solved
Aiming at the defects of the prior art, the invention aims to provide a cover plate and shell connecting structure easy to weld, and aims to solve the problems that the cover plate and aluminum shell of the traditional aluminum shell cylindrical battery need external force to tightly attach the joint of the cover plate and the aluminum shell, the joint of the cover plate and the aluminum shell is not tight due to uneven stress of the cover plate, and gaps are generated, so that hidden troubles such as explosion fire, false welding, welding leakage, uneven welding lines and the like are generated in laser welding, battery leakage is caused, and even safety performance is reduced.
(2) Technical proposal
In order to solve the technical problems, the invention provides a cover plate and shell connecting structure easy to be welded by laser, which comprises an aluminum shell and a cover plate, wherein the inner wall of the aluminum shell is provided with a groove, the upper end of the groove is set to be a right angle, the lower end of the groove is set to be arc-shaped, the cover plate comprises lower plastic, a round aluminum plate, a terminal and rivets, the terminal is arranged on the upper surface of the cover plate, the rivets are arranged on the terminal, the rivets penetrate through the terminal and the cover plate, the lower plastic is arranged on the lower part of the cover plate, the round aluminum plate is arranged on the upper side of the lower plastic, the lower part of the round aluminum plate is provided with an inner circular boss, the inner diameter of the inner circular boss is consistent with that of the aluminum shell, the lower plastic is provided with a hook-shaped structure, and the hook-shaped structure is mutually matched with the groove.
In the structure, through interior round boss and aluminum hull internal diameter unanimity, in the interior round boss embedding aluminum hull internal diameter of being convenient for is convenient for, drives the closely laminating of circular aluminum plate and aluminum hull, makes down plastic and aluminum hull inner wall laminating, and then has driven and colluded in the recess of shape structure embedding aluminum hull inner wall, owing to the recess upper end sets up to right angle, colludes shape structure and the inseparable interlock of recess of aluminum hull inner wall and is in the same place, and the snap force that produces causes apron and aluminum hull closely pressfitting together, and the joint of apron and aluminum hull is very even inseparable, and the joint can not produce hidden danger such as rosin joint, leak welding, welding seam inhomogeneous when carrying out laser welding.
Preferably, the cover plate surface is provided with an explosion-proof valve, and the explosion-proof valve is provided at one side of the terminal.
Preferably, the aluminum shell adopts a double-pass structure.
Preferably, the outer diameter of the circular aluminum plate is consistent with the outer diameter of the aluminum shell.
Preferably, the round aluminum plate is matched with the outer surface of the opening end of the aluminum shell.
Preferably, the lower plastic is matched with the inner wall of the aluminum shell.
(3) Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
the inner diameter of the inner circular boss is consistent with that of the aluminum shell, the inner circular boss is convenient to adjust and is embedded into the inner diameter of the aluminum shell, the circular aluminum plate is driven to be tightly attached to the inner wall of the aluminum shell, the lower plastic is enabled to be attached to the inner wall of the aluminum shell, the hook-shaped structure is driven to be embedded into the groove of the inner wall of the aluminum shell, the hook-shaped structure is tightly meshed with the groove of the inner wall of the aluminum shell due to the fact that the upper end of the groove is arranged to be a right angle, the generated meshing force enables the cover plate to be tightly pressed together with the aluminum shell, the joint of the cover plate and the aluminum shell is even and tight, and hidden troubles such as false welding, missing welding and uneven welding seam are avoided when laser welding is carried out on the joint.
Drawings
FIG. 1 is a schematic structural diagram of an aluminum shell according to the present invention;
FIG. 2 is a schematic view of a cover plate according to the present invention;
FIG. 3 is a top view of the cover plate of the present invention;
FIG. 4 is a side view of the cover plate of the present invention;
FIG. 5 is a cross-sectional view of a cover plate of the present invention;
fig. 6 is a cross-sectional view of a cylindrical battery according to the present invention;
fig. 7 is an enlarged schematic view of the structure at a in fig. 6.
The marks in the drawings are: 10. an aluminum shell; 1. a groove; 2. a cover plate; 3. lower plastic; 4. an inner circular boss; 5. a circular aluminum plate; 6. a hook-shaped structure; 7. a terminal; 8. a rivet; 9. an explosion-proof valve.
Detailed Description
This embodiment is easy laser welding's apron and shell connection structure, as shown in fig. 1-7, this easy laser welding's apron and shell connection structure, including aluminum hull 10 and apron 2, aluminum hull 10 inner wall has seted up recess 1, recess 1 upper end sets up the right angle, the lower extreme sets up into arc, apron 2 includes lower plastic 3, circular aluminum plate 5, terminal 7 and rivet 8, terminal 7 sets up at apron 2 upper surface, a plurality of rivets 8 set up on terminal 7, and rivet 8 runs through terminal 7 and apron 2, lower plastic 3 sets up in apron 2 lower part, circular aluminum plate 5 sets up in lower plastic 3 upside, circular aluminum plate 5 lower part is provided with interior round boss 4, and interior round boss 4 is unanimous with aluminum hull 10 internal diameter, lower plastic 3 lower part is provided with hook-shaped structure 6, hook-shaped structure 6 and recess 1 mutually support.
In the structure, through interior round boss 4 with the inside diameter of aluminum hull 10 unanimous, in the interior round boss 4 embedding aluminum hull 10 internal diameter of being convenient for, drive circular aluminum plate 5 and aluminum hull 10 closely laminate, make down plastic 3 and aluminum hull 10 inner wall laminating, and then drive collude shape structure 6 and imbed in the recess 1 of aluminum hull 10 inner wall, because recess 1 upper end sets up to the right angle, collude shape structure 6 can be in the same place with the inseparable interlock of recess 1 of aluminum hull 10 inner wall, the seaming force that produces causes apron 2 and aluminum hull 10 closely pressfitting together, the seam of apron 2 and aluminum hull 10 is very even inseparable, the seam can not produce hidden danger such as rosin joint, leak welding, welding seam inhomogeneous when carrying out laser welding.
The surface of the cover plate 2 is provided with an explosion-proof valve 9, and the explosion-proof valve 9 is arranged on one side of the terminal 7.
The aluminum shell 10 adopts a double-pass structure.
The outer diameter of the circular aluminum plate 5 is identical to the outer diameter of the aluminum case 10.
The circular aluminum plate 5 is matched with the outer surface of the opening end of the aluminum shell 10.
The lower plastic 3 is matched with the inner wall of the aluminum shell 10.
Examples:
when the cover plate 2 and the aluminum shell 10 are subjected to cover closing welding, the inner circular boss 4 of the cover plate 2 is embedded into the inner cavity of the aluminum shell 10, the round aluminum plate 5 of the cover plate 2 is tightly attached to the outer surface of the opening end of the aluminum shell 10, and then the hook-shaped structure 6 at the lower part of the lower plastic 3 is embedded into the groove 1 of the inner wall of the aluminum shell 10, as the upper end of the groove 1 is set to be a right angle, the hook-shaped structure 6 can be tightly meshed with the groove 1 of the inner wall of the aluminum shell 10, the generated meshing force causes the cover plate 2 and the aluminum shell 10 to be tightly meshed together, the seam between the cover plate 2 and the aluminum shell 10 is very uniform and tight, and hidden dangers such as false welding, leakage welding, uneven welding and the like can not be generated when the seam is subjected to laser welding.
It should be further noted that, the installation structure, connection manner or arrangement manner of each member in the present invention is a common mechanical manner, so long as the beneficial effects thereof can be achieved.
All technical features in the embodiment can be freely combined according to actual needs.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. The utility model provides an easy laser welding's apron and shell body connection structure, includes aluminum hull (10) and apron (2), its characterized in that, recess (1) has been seted up to aluminum hull (10) inner wall, recess (1) upper end sets up to the right angle, and the lower extreme sets up arc, apron (2) are including plastic (3), circular aluminum plate (5), terminal (7) and rivet (8) down, terminal (7) set up at apron (2) upper surface, a plurality of rivet (8) set up on terminal (7), just rivet (8) run through terminal (7) and apron (2), plastic (3) set up in apron (2) lower part down, circular aluminum plate (5) set up in plastic (3) upside down, circular aluminum plate (5) lower part is provided with interior boss (4), just interior boss (4) are unanimous with aluminum hull (10) internal diameter down, lower (3) lower part is provided with and colludes shape structure (6), colludes shape structure (6) and recess (1) mutually support.
2. The cover plate and shell connecting structure easy to laser welding according to claim 1, wherein an explosion-proof valve (9) is arranged on the surface of the cover plate (2), and the explosion-proof valve (9) is arranged on one side of the terminal (7).
3. The cover plate and shell connecting structure easy to laser weld according to claim 2, wherein the aluminum shell (10) adopts a double-pass structure.
4. A cover plate and housing connection structure easy to laser weld according to claim 3, characterized in that the outer diameter of the circular aluminium plate (5) is identical to the outer diameter of the aluminium housing (10).
5. The cover plate and shell connecting structure easy to laser weld according to claim 4, wherein the round aluminum plate (5) is matched with the outer surface of the opening end of the aluminum shell (10).
6. The cover plate and shell connecting structure easy to laser weld according to claim 5, wherein the lower plastic (3) is matched with the inner wall of the aluminum shell (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310979738.6A CN117117405A (en) | 2023-08-07 | 2023-08-07 | Cover plate and shell connecting structure easy to laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310979738.6A CN117117405A (en) | 2023-08-07 | 2023-08-07 | Cover plate and shell connecting structure easy to laser welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117117405A true CN117117405A (en) | 2023-11-24 |
Family
ID=88799305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310979738.6A Pending CN117117405A (en) | 2023-08-07 | 2023-08-07 | Cover plate and shell connecting structure easy to laser welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117117405A (en) |
-
2023
- 2023-08-07 CN CN202310979738.6A patent/CN117117405A/en active Pending
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