CN114122634A - Defective tab welding structure of soft-pack power lithium battery - Google Patents
Defective tab welding structure of soft-pack power lithium battery Download PDFInfo
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- CN114122634A CN114122634A CN202111572681.5A CN202111572681A CN114122634A CN 114122634 A CN114122634 A CN 114122634A CN 202111572681 A CN202111572681 A CN 202111572681A CN 114122634 A CN114122634 A CN 114122634A
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- 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
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- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
本发明公开了一种软包动力锂电池缺损极耳焊接结构，属于电池技术领域，包括电池主体，所述电池主体前端靠近中心处两侧分别开设有封口槽，两组所述封口槽关于电池主体中心轴对称，所述电池主体内部靠近两侧分别开设有四组滑动槽，所述四组滑动槽两两关于电池主体中心轴对称，所述封口槽左端内壁中心处固定连接有烧蚀片，所述滑动槽右端贯穿于封口槽左端，所述封口槽两端中心处分别开设有卡合槽，两组所述卡合槽关于封口槽中心轴对称；本发明能够对聚合物电池芯缺损极耳进行更换连接，实现电池芯极耳生产应用，可完成连接电池的正常连接，能够防止在焊接过程容易出现极耳松动，提高焊接位置精度。
The invention discloses a defective tab welding structure of a soft-pack power lithium battery, which belongs to the technical field of batteries and includes a battery main body. The front end of the battery main body is provided with sealing grooves on both sides near the center. The two groups of the sealing grooves are related to the battery. The central axis of the main body is symmetrical, and four groups of sliding grooves are respectively opened inside the battery main body near the two sides. The four groups of sliding grooves are symmetrical about the central axis of the battery main body. The center of the inner wall of the left end of the sealing groove is fixedly connected with an ablation sheet , the right end of the sliding groove runs through the left end of the sealing groove, the center of the two ends of the sealing groove is respectively provided with an engaging groove, and the two sets of the engaging grooves are symmetrical about the central axis of the sealing groove; The tabs are replaced and connected to realize the production and application of the battery core tabs, which can complete the normal connection of the battery connection, which can prevent the tabs from loosening easily during the welding process and improve the welding position accuracy.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a soft package power lithium battery defect tab welding structure.
Background
At present, for a lithium ion polymer battery core, the battery can not be used due to the defect of a positive electrode tab and a negative electrode tab of the battery, meanwhile, the positive electrode of the soft package battery is made of pure aluminum, the pure aluminum can not directly complete the welding of an electric wire or a tin wire, the defect tab of the battery core needs to be removed and then the extended welding is carried out, so that the connection of the electric wire, the tin wire and other materials is convenient after a nickel sheet is welded; therefore, the invention of the soft package power lithium battery defect tab welding structure becomes more important;
through retrieval, Chinese patent No. CN201910781589.6 discloses a welding structure and a welding method of a tab, the invention can reduce the metal particles remained in the battery and reduce the probability of causing short circuit of the battery, but can not change and connect the defective tab of a polymer battery core; in addition, the existing welding structure and the existing welding method of the tab are easy to cause the tab loosening in the welding process, so that the welding position precision is low; therefore, a soft package power lithium battery defect tab welding structure is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a defected tab welding structure of a soft-package power lithium battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a soft packet of power lithium cell defect utmost point ear welded structure, includes battery main body, the battery main body front end is close to center department both sides and has seted up the seal groove respectively, and is two sets of the seal groove is about battery main body center pin symmetry, four groups of sliding chutes have been seted up respectively to the inside both sides of being close to of battery main body, two liang of sliding chutes of four groups are about battery main body center pin symmetry.
As a further scheme of the invention, the center of the inner wall of the left end of the sealing groove is fixedly connected with an ablation sheet, the right end of the sliding groove penetrates through the left end of the sealing groove, the centers of the two ends of the sealing groove are respectively provided with a clamping groove, and the two groups of clamping grooves are symmetrical about the central axis of the sealing groove.
As a further scheme of the invention, the inside of the sealing groove is movably connected with a clamping frame through a sliding groove, two sides of the right end of the clamping frame are respectively provided with a sliding opening, and the two groups of sliding openings are symmetrical about the central axis of the clamping frame.
As a further scheme of the invention, the centers of the right sides of the two ends of the clamping frame are respectively provided with a movable groove, the two groups of movable grooves are symmetrical about the central axis of the clamping frame, and the right ends of the movable grooves are communicated with the sliding port.
As a further scheme of the invention, a spring is fixedly connected at the center of the bottom end in the movable groove, a clamping block is fixedly connected at the upper end of the spring, the clamping block is movably connected in the movable groove through the spring, and a transverse block is fixedly connected at the bottom side of the right end of the clamping block.
As a further scheme of the invention, the center of the left end of the clamping block is fixedly connected with a movable block, the movable block is movably connected inside the sliding groove, the sealing groove is movably connected with a nickel sheet through a clamping frame, the centers of two ends of the nickel sheet are respectively and fixedly connected with a connecting plate, the left end of the connecting plate is fixedly connected with a vertical plate, and the center of the front end of the nickel sheet is fixedly connected with a fixed lug.
As a further scheme of the invention, the welding method of the welding structure comprises the following specific steps:
opening the clamping frame to take down the damaged pole lug: the worker presses the transverse block, the clamping block moves in the movable groove under the driving of the transverse block, meanwhile, the spring contracts under the action of stress, the clamping block leaves the clamping groove, and after the clamping frame is pulled to a certain position, the nickel sheet and the lug are removed by an external tool;
(II) heating the ablation sheet to replace the nickel sheet: the inside ablation piece of sealing groove is heated in order to generate the suitable face of weld of area through low-power laser ablation, puts into the sealing groove with the nickel piece inside, pushes away the block frame simultaneously, presses the horizontal piece, and the block piece gets into the movable groove under the drive of horizontal plate, and when the block frame hugged closely the connecting plate, unclamp the horizontal plate, during the block piece got into the block groove under the effect of spring, welded the nickel piece on battery main part through high-power laser once more.
Compared with the prior art, the invention has the beneficial effects that:
1. when a new fixed lug needs to be installed, the ablation sheet is ablated by low-power laser to generate a welding surface with a proper area, the nickel sheet is placed in the sealing groove, and the nickel sheet is welded in the sealing groove by high-power laser again, and the fixed lug becomes a new lug of the battery, so that the defective lug of the polymer battery core can be replaced and connected, the production and application of the lug of the battery core are realized, and the normal connection of the connected battery can be completed;
2. the method for welding the defective tab of the soft-package power lithium battery is intersected with a conventional direct welding mode, a worker puts a nickel sheet into a sealing groove, a group of connecting grooves are generated under the matching of the nickel sheet, a connecting plate, a vertical plate and the sealing groove, a clamping frame is pushed to enter the connecting grooves, the connecting plate is tightly attached to the clamping frame, a transverse plate is loosened, a spring loses force and recovers the original state, a clamping block enters a clamping groove under the driving of the spring, the clamping frame fixes the nickel sheet under the matching of the clamping groove and the clamping block, the tab looseness easily occurring in the welding process can be prevented, and the welding position precision 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 principles of the invention and not to limit the invention.
FIG. 1 is an overall structure diagram of a defective tab welding structure of a soft-package power lithium battery according to the present invention;
FIG. 2 is a battery main body diagram of a defective tab welding structure of a soft-package power lithium battery provided by the invention;
FIG. 3 is an overall structure diagram of a tab of a defective tab welding structure of a soft-package power lithium battery provided by the invention;
fig. 4 is a flow chart of a method for welding a defective tab of a soft-package power lithium battery provided by the invention.
In the figure: 1. a battery main body; 2. a nickel sheet; 3. a clamping frame; 4. a sliding groove; 5. a clamping groove; 6. a movable groove; 7. a sliding port; 8. a spring; 9. a transverse block; 10. a clamping block; 11. a movable block; 12. a chute; 13. ablating the sheet; 14. a connecting plate; 15. a vertical plate; 16. fixing the tab; 17. sealing the groove.
Detailed Description
Example 1
Referring to fig. 1-3, a soft-package power lithium battery defect tab welding structure comprises a battery main body 1, wherein two sides of the front end of the battery main body 1 near the center are respectively provided with a sealing groove 17, two groups of sealing grooves 17 are symmetrical about the central axis of the battery main body 1, four groups of sliding grooves 4 are respectively arranged inside the battery main body 1 near two sides, and every two groups of sliding grooves 4 are symmetrical about the central axis of the battery main body 1.
The center of the inner wall of the left end of the sealing groove 17 is fixedly connected with an ablation sheet 13, the right end of the sliding groove 4 penetrates through the left end of the sealing groove 17, the centers of the two ends of the sealing groove 17 are respectively provided with a clamping groove 5, and the two groups of clamping grooves 5 are symmetrical about the central axis of the sealing groove 17; the inside of the sealing groove 17 is movably connected with a clamping frame 3 through a sliding groove 4, two sides of the right end of the clamping frame 3 are respectively provided with a sliding opening 7, and the two groups of sliding openings 7 are symmetrical about the central axis of the clamping frame 3.
The centers of the right sides of the two ends of the clamping frame 3 are respectively provided with a movable groove 6, the two groups of movable grooves 6 are symmetrical about the central axis of the clamping frame 3, and the right ends of the movable grooves 6 are communicated with a sliding port 7; the spring 8 is fixedly connected to the center of the bottom end in the movable groove 6, the clamping block 10 is fixedly connected to the upper end of the spring 8, the clamping block 10 is movably connected to the inside of the movable groove 6 through the spring 8, and the transverse block 9 is fixedly connected to the bottom side of the right end of the clamping block 10.
The center of the left end of the clamping block 10 is fixedly connected with a movable block 11, the movable block 11 is movably connected inside the sliding groove 12, the sealing groove 17 is movably connected with a nickel sheet 2 through a clamping frame 3, the centers of the two ends of the nickel sheet 2 are respectively and fixedly connected with a connecting plate 14, the left end of the connecting plate 14 is fixedly connected with a vertical plate 15, and the center of the front end of the nickel sheet 2 is fixedly connected with a fixed lug 16.
When the fixed tab 16 is damaged, a worker presses the transverse block 9, the clamping block 10 generates downward pressure under the driving of the transverse block 9, the spring 8 contracts under the action of the force of the clamping block 10, the clamping block 10 leaves the clamping groove 5 to enter the movable groove 6, the sliding groove 12 moves in the sliding groove 12 under the driving of the clamping block 10, the clamping frame 3 is pulled simultaneously, one end of the clamping frame 3 moves in the sliding groove 4, the clamping frame 3 leaves the sealing groove 17, the nickel sheet 2 is separated from the ablation sheet 13 through an external tool, after the separation is completed, the nickel sheet 2 and the fixed tab 16 are taken out from the sealing groove 17, when a new fixed tab 16 needs to be installed, the ablation sheet is ablated through low-power laser to generate a welding surface with a proper area, the nickel sheet 2 is placed in the sealing groove 17, the clamping frame 3 is pushed simultaneously, and when the clamping frame 3 is tightly attached to the connecting plate 14, the nickel sheet 2 is welded in the sealing groove 17 by high-power laser, and the fixed lug 16 becomes a new lug of the battery, so that the defective lug of the polymer battery core can be replaced and connected, the production application of the lug of the battery core is realized, and the normal connection of the connected battery can be completed.
Example 2
Referring to fig. 4, the welding method of the defected tab welding structure of the soft-package power lithium battery specifically comprises the following steps:
the damaged pole lug is taken down by opening the clamping frame 3: the staff presses the cross block 9, the clamping block 10 moves in the movable groove 6 under the driving of the cross block 9, meanwhile, the spring 8 contracts under the action of force, the clamping block 10 leaves the clamping groove 5, and after the clamping frame 3 is pulled to a certain position, the nickel sheet 2 and the fixed lug 16 are removed by an external tool.
Heating of the ablation sheet 13 to replace the nickel sheet 2: the inside ablation piece 13 of sealing groove 17 is heated through low-power laser ablation in order to generate the suitable face of weld of area, put into sealing groove 17 with nickel piece 2 inside, push block 3 simultaneously, press the horizontal piece 9, block 10 gets into movable groove 6 under the drive of horizontal plate 9, block 3 when hugging closely the connecting plate, loosen horizontal plate 9, block 10 gets into block 5 under the effect of spring 8 in, again through high-power laser to nickel piece 2 welding on battery main body.
It needs to be further explained that after the nickel sheet is placed in the sealing groove, the connecting groove is formed under the matching of the nickel sheet, the connecting plate, the vertical plate and the sealing groove, the clamping frame is pushed to enter the connecting groove and to be attached to the connecting plate, meanwhile, after the transverse plate is loosened, the force of the spring is lost, the clamping block returns to the original state, the clamping block enters the clamping groove under the driving of the spring, and the clamping frame fixes the nickel sheet under the matching of the clamping groove and the clamping block.
Claims (7)
1. The utility model provides a soft packet of power lithium cell defect utmost point ear welded structure, includes battery main part (1), its characterized in that, battery main part (1) front end is close to center department both sides and has seted up sealing groove (17), two sets of sealing groove (17) are about battery main part (1) center pin symmetry, four groups of sliding tray (4) have been seted up respectively to battery main part (1) inside both sides of being close to, two liang of sliding tray (4) of four groups are about battery main part (1) center pin symmetry.
2. The soft-package power lithium battery defect tab welding structure according to claim 1, wherein an ablation piece (13) is fixedly connected to the center of the inner wall of the left end of the sealing groove (17), the right end of the sliding groove (4) penetrates through the left end of the sealing groove (17), clamping grooves (5) are respectively formed in the centers of the two ends of the sealing groove (17), and the clamping grooves (5) are symmetrical about the central axis of the sealing groove (17).
3. The soft package power lithium battery defect tab welding structure according to claim 1, wherein a clamping frame (3) is movably connected inside the sealing groove (17) through a sliding groove (4), sliding openings (7) are respectively formed in two sides of the right end of the clamping frame (3), and the two groups of sliding openings (7) are symmetrical about the central axis of the clamping frame (3).
4. The soft-package power lithium battery defect tab welding structure according to claim 3, wherein the centers of the right sides of the two ends of the clamping frame (3) are respectively provided with a movable groove (6), the two groups of movable grooves (6) are symmetrical about the central axis of the clamping frame (3), and the right end of each movable groove (6) is communicated with the sliding port (7).
5. The soft-package power lithium battery defect tab welding structure according to claim 4, wherein a spring (8) is fixedly connected to the center of the bottom end inside the movable groove (6), a clamping block (10) is fixedly connected to the upper end of the spring (8), the clamping block (10) is movably connected inside the movable groove (6) through the spring (8), and a transverse block (9) is fixedly connected to the bottom side of the right end of the clamping block (10).
6. The soft package power lithium battery defect tab welding structure of claim 5, characterized in that, fixedly connected with movable block (11) is located at block (10) left end center, movable block (11) swing joint is inside spout (12), sealing groove (17) have nickel piece (2) through block frame (3) swing joint, respectively fixedly connected with connecting plate (14) are located at nickel piece (2) both ends center, connecting plate (14) left end fixedly connected with riser (15), fixed tab (16) of fixedly connected with is located at nickel piece (2) front end center.
7. The soft package power lithium battery defect tab welding structure according to claim 1, characterized in that the welding method of the welding structure comprises the following specific steps:
opening the clamping frame (3) and taking down the damaged pole lug: a worker presses the transverse block (9), the clamping block (10) moves in the movable groove (6) under the driving of the transverse block (9), meanwhile, the spring (8) contracts under the action of stress, the clamping block (10) leaves the clamping groove (5), the clamping frame (3) is pulled to a certain position, and then the nickel sheet (2) and the fixed lug (16) are removed by using an external tool;
(II) heating the ablation sheet (13) to replace the nickel sheet (2): through low-power laser ablation to inside ablation piece (13) of seal groove (17) heat in order to generate the suitable face of weld of area, put into seal groove (17) with nickel piece (2) inside, push away block (3) simultaneously, press horizontal piece (9), block piece (10) get into under the drive of diaphragm (9) in activity groove (6), when block frame (3) hug closely the connecting plate, loosen diaphragm (9), block piece (10) get into under the effect of spring (8) in block groove (5), again through high-power laser to nickel piece (2) welding on battery subject.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111572681.5A CN114122634B (en) | 2021-12-21 | 2021-12-21 | A welding structure for defective tabs of soft-pack power lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111572681.5A CN114122634B (en) | 2021-12-21 | 2021-12-21 | A welding structure for defective tabs of soft-pack power lithium battery |
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| CN114122634A true CN114122634A (en) | 2022-03-01 |
| CN114122634B CN114122634B (en) | 2024-11-26 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202127056U (en) * | 2011-07-04 | 2012-01-25 | 力神迈尔斯动力电池系统有限公司 | Fixture locating mechanism for laser welding of lug leading sheets and pole |
| CN213425146U (en) * | 2020-12-04 | 2021-06-11 | 连云港普利特电子科技有限公司 | High-safety lithium ion battery tab structure |
| CN214418014U (en) * | 2021-03-16 | 2021-10-19 | 郑州中科新兴产业技术研究院 | Soft packet of lithium battery tab reverse welding set |
| CN216529260U (en) * | 2021-12-21 | 2022-05-13 | 北海锂能新材料科技有限公司 | Soft packet of defective utmost point ear welded structure of power lithium cell |
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2021
- 2021-12-21 CN CN202111572681.5A patent/CN114122634B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202127056U (en) * | 2011-07-04 | 2012-01-25 | 力神迈尔斯动力电池系统有限公司 | Fixture locating mechanism for laser welding of lug leading sheets and pole |
| CN213425146U (en) * | 2020-12-04 | 2021-06-11 | 连云港普利特电子科技有限公司 | High-safety lithium ion battery tab structure |
| CN214418014U (en) * | 2021-03-16 | 2021-10-19 | 郑州中科新兴产业技术研究院 | Soft packet of lithium battery tab reverse welding set |
| CN216529260U (en) * | 2021-12-21 | 2022-05-13 | 北海锂能新材料科技有限公司 | Soft packet of defective utmost point ear welded structure of power lithium cell |
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| CN114122634B (en) | 2024-11-26 |
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