CN118543951B - Ultrasonic welding device and ultrasonic welding method - Google Patents
Ultrasonic welding device and ultrasonic welding method Download PDFInfo
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- CN118543951B CN118543951B CN202411047410.1A CN202411047410A CN118543951B CN 118543951 B CN118543951 B CN 118543951B CN 202411047410 A CN202411047410 A CN 202411047410A CN 118543951 B CN118543951 B CN 118543951B
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- 238000003466 welding Methods 0.000 title claims abstract description 334
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003825 pressing Methods 0.000 claims abstract description 44
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- 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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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides an ultrasonic welding device and an ultrasonic welding method, which belong to the technical field of batteries, wherein the ultrasonic welding device comprises a welding head and a welding seat, and the welding head comprises a body, a first welding end and a second welding end which are positioned on the same side of the body; the welding seat comprises a first bearing end arranged opposite to the first welding end and a second bearing end arranged opposite to the second welding end; during welding, the first welding end applies a first pressing force F1 to the root of the tab, and the second welding end applies a second pressing force F2 to the front of the tab, wherein F1 is smaller than F2. The two welding ends are arranged, so that the welding of the root part of the tab and the front part of the tab is finished simultaneously in the same working procedure, the welding efficiency is improved, and the tab is prevented from being moved and positioned for multiple times; and during welding, the first pressing force applied to the lug root is smaller than the second pressing force applied to the lug front part, so that the welding requirement of high strength of the lug front part can be met, and the lug root is prevented from being damaged under the condition of using the same welding parameter process.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an ultrasonic welding device and an ultrasonic welding method.
Background
Along with the expansion of power and energy storage markets, the capacity requirement of the secondary battery is increased year by year, the manufacturing technology of the secondary battery is gradually innovated, at present, the market mainly comprises square aluminum shell batteries, cylindrical batteries and soft package batteries, wherein the manufacturing of the square aluminum shell batteries mainly comprises the steps that pole pieces after being cut by a die are used for preparing battery cells through a winding machine or a lamination machine, and a plurality of battery cells are assembled into battery cells with high energy density.
In the battery monomer assembly, the front part of the multi-layer tab and the switching piece are required to be subjected to ultrasonic welding, and as the root part of the tab is higher in freedom degree when the core is closed and the tab is put into the shell, the root part of the tab is subjected to pre-welding operation at the present stage so as to perform welding and receiving and gathering, and the risk that the tab is sunk and is reversely inserted into the pole piece is avoided.
Because the welding power, the amplitude and other requirements of the pre-welding of the pole lug root and the final welding of the pole lug front are different, the welding of the pole lug needs to be performed with multiple positioning through two welding procedures, the welding time is long, and the welding efficiency is low.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that in the existing battery cell manufacturing process, two welding procedures are needed for welding the tab, the welding time is long and the welding efficiency is low, so that the ultrasonic welding device and the ultrasonic welding method are provided.
In order to solve the above technical problems, the present invention provides an ultrasonic welding apparatus, comprising:
the welding head comprises a body, a first welding end and a second welding end which are positioned on the same side of the body;
The welding seat comprises a first bearing end and a second bearing end, the first bearing end is arranged opposite to the first welding end, the second bearing end is arranged opposite to the second welding end, the first welding end and the first bearing end are matched to weld the root of the tab, and the second welding end and the second bearing end are matched to weld the front part of the tab and the adapter piece;
during welding, the first welding end applies a first pressing force F1 to the root part of the tab, and the second welding end applies a second pressing force F2 to the front part of the tab, wherein F1 is smaller than F2.
Optionally, the first welding end and the first receiving end are provided with a plurality of first welding teeth arranged in an arrayed manner; and a plurality of second welding teeth which are arranged in a arrayed manner are arranged on the second welding end and the second receiving end.
Optionally, when the welding head is in a welding state, a distance between the first welding tooth on the first welding end and the first welding tooth on the first receiving end is L1, a distance between the second welding tooth on the second welding end and the second welding tooth on the second receiving end is L2, and L1 is smaller than L2;
and/or, the first welding teeth are square teeth;
And/or, the second welding teeth are arc-shaped teeth.
Optionally, the first welding end and the first receiving end have the same end face, and the second welding end and the second receiving end have the same end face.
Optionally, the first welding end and the second welding end are connected through a first connecting surface, and an angle A is formed between the first connecting surface and the end surface of the first welding end, wherein the angle A is more than 0 degrees and less than or equal to 90 degrees.
Optionally, the end face of the second welding end is higher than the end face of the first welding end along the height direction of the welding head.
Optionally, the first receiving end and the second receiving end are connected through a second connecting surface, and the second connecting surface is parallel to the first connecting surface.
Optionally, the method further comprises: the pressing piece is arranged between the welding head and the welding seat and used for fixing the electrode lug;
The pressing plate piece comprises a first section, a second section and a third section which are sequentially connected, wherein the first section is provided with a first through hole for the first welding end to pass through, and the third section is provided with a second through hole for the second welding end to pass through;
And a groove for accommodating the second section is formed in the position, opposite to the second section, of the body.
Optionally, the method further comprises: the driving piece is connected with the body, and drives the body to drive the first welding end and the second welding end to synchronously move.
The invention also provides an ultrasonic welding method, which adopts the ultrasonic welding device of any one of the above steps, and comprises the following steps:
The method comprises the steps of placing a tab and a transfer sheet in an ultrasonic welding device, wherein the root of the tab is opposite to a first welding end, the front of the tab is opposite to a second welding end, and the transfer sheet is stacked on the front of the tab;
driving the welding head to press downwards until the first welding end presses the root of the lug, and the second welding end presses the front part of the lug and the adapter plate;
and welding according to a set process, and simultaneously completing the pre-welding of the root part of the tab and the final welding of the front part of the tab and the adapter piece.
The technical scheme of the invention has the advantages that the welding head is pressed down as follows:
the invention provides an ultrasonic welding device, which comprises a welding head and a welding seat, wherein the welding head comprises a body, and a first welding end and a second welding end which are positioned on the same side of the body; the welding seat comprises a first bearing end and a second bearing end, the first bearing end is arranged opposite to the first welding end, the second bearing end is arranged opposite to the second welding end, the first welding end and the first bearing end are matched to weld the root of the tab, and the second welding end and the second bearing end are matched to weld the front part of the tab and the adapter piece; during welding, the first welding end applies a first pressing force F1 to the root part of the tab, and the second welding end applies a second pressing force F2 to the front part of the tab, wherein F1 is smaller than F2.
Through the arrangement of the two welding ends, the welding of the root part of the tab and the front part of the tab is completed simultaneously in the same working procedure, so that the welding efficiency is improved, and the tab is prevented from being subjected to multiple-time moving positioning and crimping; and during welding, the first pressing force applied to the lug root is smaller than the second pressing force applied to the lug front part, so that the welding requirement of high strength of the lug front part can be met, and the lug root is prevented from being damaged under the condition of using the same welding parameter process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the structure of an embodiment of an ultrasonic welding apparatus provided in example 1 of the present invention;
FIG. 2 is a schematic view of the structure of the weld head of FIG. 1 after being depressed;
FIG. 3 is a schematic bottom view of the weld head of FIG. 1;
FIG. 4 is a schematic view of the platen member of FIG. 1;
fig. 5 is a schematic structural view of the tab in embodiment 1 of fig. 1 in a subsequent core assembly process.
Reference numerals illustrate:
1. Welding head; 2. a body; 3. a first welding end; 4. a second welding end; 5. a welding seat; 6. a first receiving end; 7. a second receiving end; 8. the root of the tab; 9. the front part of the tab; 10. a transfer sheet; 11. a first welding tooth; 12. a second welding tooth; 13. a first connection surface; 14. a second connection surface; 15. a platen member; 16. a first section; 17. a second section; 18. a third section; 19. a first through hole; 20. a second through hole; 21. a groove; 22. the middle part of the electrode lug.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The ultrasonic welding device provided by the embodiment can simultaneously realize the pre-welding of the root part of the tab and the welding of the front part of the tab and the switching piece.
The lug root 8 is the position department that the lug is close to the electric core, and the lug front portion 9 is the position department that the lug kept away from the electric core, and changeover piece 10 and lug front portion 9 butt welding, multilayer lug root 8 carry out the prewelding and accomplish to draw in, avoid having the risk of inserting in the pole piece in the fall.
As shown in fig. 1 and 2, a specific implementation manner of the ultrasonic welding device provided in this embodiment includes a welding head 1 and a welding seat 5, where the welding head 1 includes a body 2, and a first welding end 3 and a second welding end 4 located on the same side of the body 2; the welding seat 5 comprises a first receiving end 6 arranged opposite to the first welding end 3 and a second receiving end 7 arranged opposite to the second welding end 4, the first welding end 3 and the first receiving end 6 are matched to weld the tab root 8, and the second welding end 4 and the second receiving end 7 are matched to weld the tab front 9 and the adapter tab 10; during welding, the first welding end 3 applies a first pressing force F1 to the tab root 8, and the second welding end 4 applies a second pressing force F2 to the tab front part 9, wherein F1 is smaller than F2.
Through the arrangement of the two welding ends, the welding of the lug root 8 and the lug front 9 is completed simultaneously in the same process, so that the welding efficiency is improved, and the multiple movement positioning of the lug is avoided; and during welding, the first pressing force applied to the lug root 8 is smaller than the second pressing force applied to the lug front 9, so that the welding requirement of high strength of the lug front 9 can be met, and the lug root 8 is prevented from being damaged under the condition of using the same welding parameter process.
The pre-welding of the tab root 8 is a process of gathering and trimming, the requirement on welding strength is not high, and the final welding of the tab front 9 is to ensure stability between the tab front 9 and the adapter tab 10, and higher strength is required.
Specifically, the end surfaces of the first welding end 3 and the second welding end 4 are rectangular structures, the end surfaces of the first welding end 3 and the second welding end 4 are parallel to each other, friction is performed between the first welding end 3 and the second welding end 4 and the first receiving end 6 and the second receiving end 7 respectively, and meanwhile, the welding process is completed.
Specifically, for the setting of the difference between the first pressing force F1 and the second pressing force F2, this can be achieved by corresponding setting of the distance between the first welding end 3 and the first receiving end 6 and the distance between the second welding end 4 and the second receiving end 7, so that when the end face of the second welding end 4 is tightly pressed against the tab front portion 9 during the pressing down of the welding head 1, the first welding end 3 is slightly pressed against the tab root portion 8 at this time.
As an improved embodiment, a pressure sensor may be provided to detect the first pressing force F1 and the second pressing force F2, respectively, to avoid damaging the pole root 8 during welding when the first pressing force is too large.
As shown in fig. 1 and fig. 3, in the ultrasonic welding device provided in this embodiment, a plurality of first welding teeth 11 are arranged on each of the first welding end 3 and the first receiving end 6; the second welding end 4 and the second receiving end 7 are respectively provided with a plurality of second welding teeth 12 which are arranged in a arrayed manner.
Specifically, a plurality of first welding teeth 11 equipartition interval sets up, and a plurality of second welding teeth 12 equipartition interval sets up, is convenient for produce even heat, and the atress is even, avoids stress concentration, guarantees welding quality.
In addition, in other embodiments, the first welding tooth 11 and the second welding tooth 12 may not be provided, the tab may be subjected to a toothless welding process, or only the first welding tooth 11 may not be provided.
As shown in fig. 1 and fig. 3, in the ultrasonic welding device provided in this embodiment, the first welding teeth 11 are square teeth, specifically, may have a square table structure, so as to avoid stress concentration in the welding process, avoid cracking of the tab in the welding process, and the square teeth are more easily set densely relative to other structures, so that more welding spots are provided in the pre-welding process, and the folding effect is better.
In one embodiment of the square tooth, the side length on the end face of the first welding end 3 is 0.5-0.6mm, preferably 0.55mm, and the side length of the outer end face of the square tooth is 0.2-0.3mm, preferably 0.25mm; the square teeth decrease in cross section in a direction away from the first welding end 3, the spacing between adjacent square teeth in the first direction being 0.03-0.05mm, preferably 0.04mm, and the spacing between adjacent square teeth in the second direction being 0.2-0.4mm, preferably 0.3mm. The first direction is the up-down direction in fig. 3, and the second direction is the left-right direction in fig. 3.
As shown in fig. 1 and 3, in the ultrasonic welding device provided in this embodiment, the second welding teeth 12 are arc-shaped teeth, and are in smooth contact with the tab, so that uniform heat is more easily generated, the welding quality is more stable, and the final welding quality is ensured.
In one embodiment of the arcuate teeth, the arcuate teeth are hemispheres having a decreasing cross-section in a direction away from the second weld end 4, and have a radius of 1-1.5mm on the end face of the second weld end 4, with a spacing between adjacent arcuate teeth in the first direction of 0.2-0.3mm, preferably 0.25mm, and a spacing between adjacent arcuate teeth in the second direction of 0.4-0.6mm, preferably 0.5mm. The first direction is the up-down direction in fig. 3, and the second direction is the left-right direction in fig. 3.
Namely, the arrangement of the first welding teeth 11 is denser than that of the second welding teeth 12, and the folding effect of the tab root 8 is improved.
In the ultrasonic welding device provided in this embodiment, when the welding head 1 is in a welding state, a distance between the first welding tooth 11 on the first welding end 3 and the first welding tooth 11 on the first receiving end 6 is L1, a distance between the second welding tooth 12 on the second welding end 4 and the second welding tooth 12 on the second receiving end 7 is L2, L1 is smaller than L2, and when the welding head 1 is in a welding state, the welding head 1 is in a state after pressing down the welding head 1 and then pressing the tab; the difference in size has two reasons, namely, the thickness of the tab front part 9 and the adapter piece 10 needs to be accommodated between the second welding teeth 12, and the thickness of the tab root part 8 only needs to be accommodated between the first welding teeth 11, so that in theory, L1 is smaller than L2, and the corresponding size is required to be set according to the thickness of the adapter piece 10 and the thickness change of the tab and the adapter piece 10 after compression according to the difference in two distances.
As shown in fig. 1, in the ultrasonic welding apparatus provided in this embodiment, the first welding end 3 and the first receiving end 6 have the same end face, and the second welding end 4 and the second receiving end 7 have the same end face. In order to ensure the compactness of structure and the accurate welding of welding area, if first accepting end 6 is greater than first welding end 3, the utmost point ear region that needs to compress tightly is great, and the welded region is less, leads to the utmost point ear free portion between utmost point ear root portion 8 and utmost point ear front portion 9 longer after the welding, influences follow-up core process that closes.
Specifically, the end face sizes of the first welding end 3 and the second welding end 4 may be set correspondingly according to the size of the area to be pre-welded and the size of the area to be final welded.
As shown in fig. 1, in the ultrasonic welding device provided in this embodiment, the first welding end 3 and the second welding end 4 are connected by a first connection surface 13, and an angle a is formed between the first connection surface 13 and an end surface of the first welding end 3, where a is greater than 0 ° and less than or equal to 90 °, and preferably is 60 °.
The angle between the first connecting surface 13 and the end surface of the first welding end 3 is set, so that the first welding end 3 and the second welding end 4 are located on a non-same plane, the height difference is formed, the set of the height difference reduces the pulling force between the lug root 8 and the lug front 9, when the lug root 8 and the lug front 9 are welded on the same plane, the first welding end 3 and the second welding end 4 are closely spaced, ultrasonic welding is friction welding, and due to the fact that the lugs are fixed, mutual pulling between the lug root 8 and the lug front 9 can be caused, the damage of the lugs is easy to cause, when the height difference exists, the distance between the first welding end 3 and the second welding end 4 is increased, the force applied to the same plane relatively after the stress is decomposed along the horizontal direction is reduced, and the damage of the lugs is greatly reduced.
Specifically, the greater the angle a, the less force the tab is subjected to horizontal pulling.
As shown in fig. 1, in the ultrasonic welding apparatus provided in this embodiment, along the height direction of the welding head 1, the end surface of the second welding end 4 is higher than the end surface of the first welding end 3. The height direction of the horn 1 is the up-down direction in fig. 1.
The shape of the tab after welding is that the tab root 8 is positioned below the tab front part 9, which is more beneficial to the subsequent core-closing process. As shown in fig. 5, the lower structure in the drawing is a battery cell, and the upper plate structure in the drawing is a top cover, and it can be seen from the drawing that the tab shape after welding in the embodiment is convenient for core assembly, and only the tab front portion 9 needs to be bent.
As shown in fig. 1, in the ultrasonic welding device provided in this embodiment, the first receiving end 6 and the second receiving end 7 are connected by a second connection surface 14, the second connection surface 14 is disposed parallel to the first connection surface 13, the first connection surface 13 and the second connection surface 14 cooperate to complete the arrangement of the tab root portion 8 and the tab front portion 9 on different planes, and the second connection surface 14 supports the tab middle portion 22.
As shown in fig. 1, 2 and 4, the ultrasonic welding device provided in this embodiment further includes a pressing plate 15, where the pressing plate 15 is disposed between the welding head 1 and the welding seat 5, and is used for fixing the tab; the pressing plate 15 comprises a first section 16, a second section 17 and a third section 18 which are sequentially connected, the first section 16 is provided with a first through hole 19 for the first welding end 3 to pass through, and the third section 18 is provided with a second through hole 20 for the second welding end 4 to pass through; the body 2 is provided with a recess 21 for receiving the second section 17 at a position opposite the second section 17.
The arrangement of the pressing piece 15 can not only stably fix the tab, but also can not influence the functions of the first welding end 3 and the second welding end 4, and when the tab is fixed, the second section 17 is arranged in the groove 21, and the second section 17 and the second connecting surface 14 compress tightly the middle 22 of the tab.
Specifically, the edges of the first section 16 and the third section 18 can compress the edges of the tabs, and the tabs are compressed synchronously with the second section 17, in addition, only the first through holes 19 and the second through holes 20 in the first section 16 and the third section 18 are arranged opposite to the tabs, the edges of the first section 16 and the third section 18 do not compress the tabs, and the tabs are fixed only through the second section 17.
When the pressing plate 15 is driven, the pressing plate 15 can be moved between the welding head 1 and the welding seat 5 through a mechanical clamping jaw which is additionally arranged, and the second section 17 of the pressing plate 15 is pressed through the groove 21 in the pressing process of the welding head 1, so that the pressing plate 15 is fixed.
In addition, as an alternative embodiment, the fixing structure may be additionally provided to fix the pressing plate 15 independently of the welding head 1, for example, screw holes may be correspondingly provided at edge positions of the pressing plate 15 and the welding base 5, and fixing of the pressing plate 15 itself and fixing of the pressing plate 15 to the tab may be achieved by bolts.
The ultrasonic welding device provided by the embodiment further comprises a driving piece, wherein the driving piece is connected with the body 2, and the driving piece drives the body 2 to drive the first welding end 3 and the second welding end 4 to synchronously move.
Specifically, the driving member may be a linear module or the like, so as to realize the up-and-down sliding process of the welding head 1.
The ultrasonic welding device provided in this embodiment further includes structures such as an ultrasonic generator and a transducer, which are conventional techniques in ultrasonic welding, and are not described in detail.
Example 2
A specific implementation manner of the ultrasonic welding method provided in this embodiment includes using the ultrasonic welding apparatus described in embodiment 1, including the following steps:
The tab and the adapter sheet 10 are placed in an ultrasonic welding device, wherein the root 8 of the tab is opposite to the first welding end 3, the front 9 of the tab is opposite to the second welding end 4, and the adapter sheet 10 is stacked on the front 9 of the tab;
the welding head 1 is driven to press downwards until the first welding end 3 presses the lug root 8 and the second welding end 4 presses the lug front 9 and the adapter plate 10;
And welding according to a set process, and simultaneously completing the pre-welding of the tab root 8 and the final welding of the tab front part 9 and the adapter piece 10.
The simultaneous welding of the tab root 8 and the tab front part 9 is completed through one welding device and one welding procedure, and the welding efficiency is improved.
The setting process specifically refers to that the tab is welded through the welding device under the condition of specific welding power, welding duration and other process parameters, wherein the welding power and the welding duration are correspondingly set according to the welding requirements of the tab, and the tab welding requirements of the battery cells with different specifications and types are different.
Specifically, the shape of the tab before welding may be set directly to the shape adapted to the first receiving end 6 and the second receiving end 7 on the weld holder 5 by hand, or may be set without setting, and the tab is pressed to the specified shape in the pressing process of the welding head 1.
The ultrasonic welding method provided by the embodiment comprises the steps of rubberizing the pre-welding stamp and the final welding stamp through a rubberizing tool; after the rubberizing is finished, the cell flows to the following working procedure.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (7)
1. An ultrasonic welding apparatus, comprising:
the welding head (1) comprises a body (2), and a first welding end (3) and a second welding end (4) which are positioned on the same side of the body (2);
The welding seat (5) comprises a first bearing end (6) which is arranged opposite to the first welding end (3) and a second bearing end (7) which is arranged opposite to the second welding end (4), the first welding end (3) and the first bearing end (6) are matched to weld the lug root (8), and the second welding end (4) and the second bearing end (7) are matched to weld the lug front part (9) and the rotating sheet (10);
during welding, the first welding end (3) applies a first pressing force F1 to the lug root (8), and the second welding end (4) applies a second pressing force F2 to the lug front (9), wherein F1 is smaller than F2; the difference between the first pressing force F1 and the second pressing force F2 is realized by correspondingly setting the distance between the first welding end (3) and the first receiving end (6) and the distance between the second welding end (4) and the second receiving end (7);
the first welding end (3) and the second welding end (4) are connected through a first connecting surface (13), and an angle A is formed between the first connecting surface (13) and the end surface of the first welding end (3), wherein A is more than 0 degrees and less than or equal to 90 degrees;
The end face of the second welding end (4) is higher than the end face of the first welding end (3) along the height direction of the welding head (1);
the first bearing end (6) and the second bearing end (7) are connected through a second connecting surface (14), and the second connecting surface (14) is parallel to the first connecting surface (13).
2. The ultrasonic welding device according to claim 1, characterized in that the first welding end (3) and the first receiving end (6) are provided with a plurality of first welding teeth (11) arranged in an array; and a plurality of second welding teeth (12) which are arranged in a arrayed manner are arranged on the second welding end (4) and the second receiving end (7).
3. The ultrasonic welding device according to claim 2, characterized in that the distance between the first welding tooth (11) on the first welding end (3) and the first welding tooth (11) on the first receiving end (6) is L1, the distance between the second welding tooth (12) on the second welding end (4) and the second welding tooth (12) on the second receiving end (7) is L2, L1 being smaller than L2, when the welding head (1) is in a welding state;
and/or, the first welding teeth (11) are square teeth;
and/or, the second welding teeth (12) are arc-shaped teeth.
4. The ultrasonic welding device according to claim 1, characterized in that the first welding end (3) is the same size as the end face of the first receiving end (6), and the second welding end (4) is the same size as the end face of the second receiving end (7).
5. The ultrasonic welding apparatus according to claim 1, further comprising: the pressing piece (15) is arranged between the welding head (1) and the welding seat (5) and is used for fixing the lug;
The pressing plate piece (15) comprises a first section (16), a second section (17) and a third section (18) which are sequentially connected, wherein a first through hole (19) for the first welding end (3) to pass through is formed in the first section (16), and a second through hole (20) for the second welding end (4) to pass through is formed in the third section (18);
A groove (21) for accommodating the second section (17) is arranged on the body (2) at a position opposite to the second section (17).
6. The ultrasonic welding apparatus according to any one of claims 1 to 5, further comprising: the driving piece is connected with the body (2), and the driving piece drives the body (2) to drive the first welding end (3) and the second welding end (4) to synchronously move.
7. An ultrasonic welding method, characterized in that the ultrasonic welding apparatus according to any one of claims 1 to 6 is used, comprising the steps of:
The tab and the switching piece (10) are arranged in an ultrasonic welding device, wherein the root part (8) of the tab is opposite to the first welding end (3), the front part (9) of the tab is opposite to the second welding end (4), and the switching piece (10) is stacked on the front part (9) of the tab;
The welding head (1) is driven to press downwards until the first welding end (3) presses the lug root part (8) and the second welding end (4) presses the lug front part (9) and the switching piece (10);
and welding according to a set process, and simultaneously completing the pre-welding of the lug root (8) and the final welding of the lug front (9) and the switching piece (10).
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|---|---|---|---|---|
| JP2004221294A (en) * | 2003-01-15 | 2004-08-05 | Toshiba Corp | Ultrasonic bonding tool and method for manufacturing semiconductor by using the same |
| CN216730157U (en) * | 2022-01-07 | 2022-06-14 | 隆能科技(南通)有限公司 | Simple and easy laminate polymer battery utmost point ear welding jig |
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| CN213827466U (en) * | 2020-11-19 | 2021-07-30 | 东莞塔菲尔新能源科技有限公司 | Full utmost point ear ultrasonic welding anchor clamps and welding set |
| CN112719560B (en) * | 2021-01-27 | 2022-09-30 | 合肥国轩高科动力能源有限公司 | Ultrasonic welding device for battery tab and connecting sheet |
| CN215919402U (en) * | 2021-10-12 | 2022-03-01 | 无锡骄成智能科技有限公司 | Prevent ultrasonic welding head structure that utmost point ear broke |
| CN115395186A (en) * | 2022-07-01 | 2022-11-25 | 岳阳耀宁新能源科技有限公司 | Square lithium ion battery with staggered lugs and lug welding device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004221294A (en) * | 2003-01-15 | 2004-08-05 | Toshiba Corp | Ultrasonic bonding tool and method for manufacturing semiconductor by using the same |
| CN216730157U (en) * | 2022-01-07 | 2022-06-14 | 隆能科技(南通)有限公司 | Simple and easy laminate polymer battery utmost point ear welding jig |
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