CN211072230U - Utmost point ear subassembly and ultrasonic welding device thereof - Google Patents
Utmost point ear subassembly and ultrasonic welding device thereof Download PDFInfo
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- CN211072230U CN211072230U CN201921904755.9U CN201921904755U CN211072230U CN 211072230 U CN211072230 U CN 211072230U CN 201921904755 U CN201921904755 U CN 201921904755U CN 211072230 U CN211072230 U CN 211072230U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a pole ear component and an ultrasonic welding device thereof, the ultrasonic welding device of the pole ear component comprises a welding seat and a welding head arranged above the welding seat; the welding head is provided with a first welding tooth, the welding head is provided with a second welding tooth, and the first welding tooth and the second welding tooth are cylindrical bulges. The utility model provides a utmost point ear subassembly and ultrasonic welding device thereof, welding process has been reduced, welding efficiency is improved, can effectively reduce battery tab's rosin joint and reduce connecting resistance simultaneously, improve the connection stability of mould battery tab, battery module charge-discharge has effectively been improved, especially the condition that battery tab excessively generates heat among the big multiplying power charge-discharge process, and can effectively prolong the life of bonding tool and welding seat, can furthest reduce the burr production of the utmost point ear subassembly after the welding, make the recess edge of utmost point ear subassembly level and smooth more, reduce subsequent handling, machining efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of the battery, more specifically say, relate to a utmost point ear subassembly and ultrasonic welding device thereof.
Background
Laminate polymer batteries are increasingly used in power batteries and their modules because of their high safety, high specific energy and flexible design. Each battery cell monomer in the battery module can realize the rated voltage and the module capacity output of the module only through the tab welding. Therefore, the importance of the welding of the cell tabs in the battery module on the quality and the manufacturing efficiency of the module is self-evident.
At present, the prior art generally adopts laser welding to weld the cell tabs of the battery module, and the pre-welding state of the module tabs is shown in fig. 1. When welding is needed, the tab 103 of the battery module 10 is bent and flattened, so that the tab 103 is tightly attached to the busbar 102 under the action of the auxiliary pressing block, and then laser welding is performed. However, the material and the thickness dimension of the tab 103 are adopted, so that the insulating part 101 is easy to deform and damage, and then the local gap between the tab 103 and the bus copper bar 102 is large, so that the tab 103 is welded by cold solder joint and the tab weld joint resistance is too large, and even the condition that the current carrying capacity of the module is reduced and the local overheating is aggravated is caused, thereby causing the potential safety hazard of the battery module.
In addition, the Chinese patent grant publication number: CN209006870U, entitled bulletin date 2019, 06, 21, discloses an ultrasonic welding device for a flexibly packaged battery tab and a welding head thereof, wherein the welding head of the ultrasonic welding device for the flexibly packaged battery tab comprises a connecting part, an intermediate part and a welding part which are sequentially connected along an ultrasonic transmission direction, the welding part is flat, and at least one welding tooth is arranged on two side surfaces of the welding part in the thickness direction. The welding head is designed into a flat special welding head to adapt to a narrow space between the lugs of the soft package battery, so that the lugs and the bus bar of the soft package battery are welded by ultrasonic waves, the traditional laser welding and riveting are replaced, the contact resistance can be effectively reduced, the conductive area is increased, and the manufacturing cost is reduced. However, the welding head adopting the structure has more burrs on the welded electrode lug and shorter service life.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art or the correlation technique.
One of the purposes of the utility model is that: the utility model provides an ultrasonic welding device of utmost point ear subassembly solves the utmost point ear burr that prior art exists more, the short technical problem of life-span.
The utility model discloses the technological effect that will reach is realized through following scheme:
the utility model provides an ultrasonic welding device of a pole ear assembly, which comprises a welding seat and a welding head arranged above the welding seat; the method is characterized in that: the welding head is provided with a first welding tooth, the welding head is provided with a second welding tooth, and the first welding tooth and the second welding tooth are cylindrical bulges.
The technical scheme of the utility model has following advantage: the lug assembly is pressed and fixed by utilizing ultrasonic high-frequency vibration through the matching of the welding seat and the welding head, so that the welding procedures are reduced, the welding efficiency is improved, meanwhile, the insufficient welding of the lug assembly and the connection resistance are effectively reduced, the connection stability of the lug assembly is improved, the charging and discharging of a battery module are effectively improved, and particularly, the situation that the lug assembly excessively generates heat in the large-magnification charging and discharging process is effectively improved; moreover, the use of copper bars and insulating parts in the laser welding process in the prior art can be reduced, the effective volume of the electrical property of the module is further increased, and the grouping ratio of the soft-package battery cell module is improved; in addition, the first welding teeth and the second welding teeth are arranged to be cylindrical bulges, so that stress concentration is difficult to form, the service life of the welding head and the welding seat can be effectively prolonged, burrs of a welded lug assembly can be reduced to the greatest extent, the groove edge of the lug assembly is smoother, subsequent procedures are reduced, and the processing efficiency is improved.
In one embodiment, the number of the first welding teeth is multiple, the first welding teeth are uniformly arranged at intervals, the number of the second welding teeth is multiple, and the second welding teeth are uniformly arranged at intervals.
By adopting the technical scheme, the stress can be uniform, and the stress concentration is avoided.
In one embodiment, the welding seat comprises a first mounting seat, a pressure conversion part, a pressure bearing part and a first welding part for bearing a tab assembly, which are connected in sequence, and the cross-sectional areas of the first mounting seat, the pressure conversion part, the pressure bearing part and the first welding part are reduced in sequence; the bonding tool including the second mount pad, connecting portion, load portion that connect gradually and be used for with the cooperation of first weld part is in order to weld tab assembly's second weld part, the second mount pad connecting portion load portion and the cross-sectional area of second weld part reduces in proper order.
Through adopting as above technical scheme, through reducing the cross-sectional area of first mount pad, pressure conversion portion, pressure receiving portion and first welding part in proper order, the cross-sectional area of second mount pad, connecting portion, load portion and second welding part reduces in proper order for first welding part and second welding part can stretch into narrow space simultaneously under the prerequisite that satisfies bearing pressure, satisfy the welding of not unidimensional utmost point ear subassembly.
In one embodiment, the end face of the first welding part far away from the pressure bearing part is provided with a first inclined step, and/or the end face of the second welding part far away from the force bearing part is provided with a second inclined step.
Through adopting as above technical scheme, this first oblique step's setting can avoid the first tooth antipodal ear subassembly of welding on the first welding portion to cause the fish tail. The setting of this oblique step of second can avoid the second on the second welding portion to weld the tooth antipodal ear subassembly and cause the fish tail.
In one embodiment, an avoiding inclined surface is arranged at the joint between the second welding part and the bearing part.
Through adopting above technical scheme, should dodge the setting of inclined plane, can avoid when the bonding tool pressfitting on the welding seat, first welding part and second welding part produce the interference.
In one embodiment, the width of the first weld is greater than the width of the second weld.
Through adopting above technical scheme to make this first weld part can provide sufficient holding surface for utmost point ear subassembly, provide the convenience of installation and debugging simultaneously.
In one embodiment, the peripheral side edge of the first welding portion and the end surface of the first welding portion, which is far away from the second welding portion, are coated with a first insulating layer, and/or the peripheral side edge of the second welding portion and the end surface of the second welding portion, which is far away from the first welding portion, are coated with a second insulating layer.
Through adopting as above technical scheme, the setting on this first insulating layer can avoid other non-welding faces of first weld part and battery module's other to wait to weld the contact of utmost point ear subassembly and lead to the battery module short circuit, and the setting on this second insulating layer can avoid other non-welding faces of second weld part and battery module's other to wait to weld utmost point ear subassembly contact and lead to the battery module short circuit.
Yet another object of the present invention is: the utility model provides a pole lug assembly, the pole lug burr that exists among the solution prior art is more, the short technical problem of life-span.
In order to achieve the purpose, the utility model provides a tab assembly, which comprises at least two tabs; the tabs are sequentially stacked and welded and fixed by the ultrasonic welding device, a first cylindrical groove matched with the first welding tooth is formed on the surface of the tab contacted with the welding seat, and a second cylindrical groove matched with the second welding tooth is formed on the surface of the tab contacted with the welding head.
In one embodiment, the number of the first cylindrical grooves is multiple, the multiple first cylindrical grooves are uniformly arranged at intervals, the number of the second cylindrical grooves is multiple, and the multiple second cylindrical grooves are uniformly arranged at intervals.
Through adopting above technical scheme, through arranging first cylindrical recess and second cylindrical recess interval evenly, can make the atress concentrate, avoid stress concentration.
In one embodiment, each of the tabs includes a connection region and a weld region connected to the connection region, the connection region and the weld region forming L or an S-shape.
Through adopting above technical scheme to make when ultrasonic welding device welds can directly pressfitting and welded fastening.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a prior art module tab using laser welding before welding;
fig. 2 is a schematic perspective view of an ultrasonic welding device for a tab assembly according to a first embodiment of the present invention;
fig. 3 is a schematic perspective view of a welding head according to a first embodiment of the present invention;
fig. 4 is a side view of a welding head used in a first embodiment of the present invention;
fig. 5 is a schematic perspective view of a welding seat according to a first embodiment of the present invention;
fig. 6 is a usage state diagram of the first embodiment of the present invention;
FIG. 7 is a schematic perspective view of a welding seat according to a second embodiment of the present invention;
fig. 8 is a schematic perspective view of a tab assembly according to a first embodiment of the present invention;
fig. 9 is another schematic perspective view of a tab assembly according to a first embodiment of the present invention;
FIG. 10 is an enlarged partial schematic view of FIG. 9 at A;
fig. 11 is a schematic perspective view of a tab assembly according to a second embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
10-a battery module; 101-an insulating member; 102-busbar; 103-pole ear; 20-welding a base; 201-first welding teeth; 21-a first mount; 211-mounting holes; 22-a pressure conversion section; 23-a pressure receiving portion; 24-a first weld; 241-a first inclined step; 242 — a first insulating layer; 30-a welding head; 301-a second welding tooth; 31-a second mount; 311-a mounting surface; 312-mounting the circular table; 32-a connecting portion; 33-a force bearing part; 34-a second weld; 341-second inclined step; 342-a second insulating layer; 35-avoiding the inclined plane; 40-a tab assembly; 41-pole ear; a 411-linking region; 412-a weld zone; 401-a first cylindrical recess; 402-second cylindrical recess.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "width," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
According to the embodiment of the utility model provides an ultrasonic welding device of utmost point ear subassembly, please refer to fig. 2 to fig. 6, including welding seat 20 and bonding tool 30, welding seat 20 is used for bearing utmost point ear subassembly 40, and is concrete, places before welding seat 20 at utmost point ear subassembly 40, can be according to actual need, with the prefabricated deformation of series connection or parallelly connected utmost point ear subassembly 40 to make utmost point ear subassembly 40 after the pile up laminate together, place utmost point ear subassembly 40 after the pile up in welding seat 20 again, through the cooperation of welding seat 20 with bonding tool 30, thereby with utmost point ear subassembly 40 pressfitting and utilize ultrasonic wave high frequency vibration to weld utmost point ear subassembly 40 fixed. The ultrasonic welding speed is high, and the bending and flattening processes of the tab assembly 40 are combined in a contact welding mode, so that the welding processes are reduced, the welding efficiency is improved, meanwhile, the insufficient welding of the tab assembly 40 and the connection resistance are effectively reduced, the connection stability of the tab assembly 40 is improved, the charging and discharging of a battery module are effectively improved, and particularly, the excessive heating condition of the tab assembly 40 in the large-rate charging and discharging process is effectively improved; in addition, can also reduce the use of the copper bar and insulating part among the prior art adopted the laser welding process, further increase the effective volume of module electrical property, promote the percentage in groups of soft-packaged electrical core module.
Wherein, the welding seat 20 is provided with a first welding tooth 201, the welding head 30 is provided with a second welding tooth 301, and the first welding tooth 201 and the second welding tooth 301 are cylindrical protrusions. Because first welding tooth 201 and second welding tooth 301 are cylindrical, difficult formation stress concentration to can effectively prolong the life of bonding tool 30 and welding seat 20, and can furthest reduce the burr of welded utmost point ear subassembly 40 and produce, make utmost point ear subassembly 40's recess edge more level and more smooth, reduce subsequent handling, improve machining efficiency.
The utility model provides a method of use of utmost point ear assembly 40's ultrasonic welding device is as follows:
firstly, grouping, preprocessing and attaching the tab assemblies 40;
then, extending the welding seat 20 into one side of the module electric core and attaching the welding seat to the bottom of the tab assembly 40, and extending the welding head 30 into the top of the module electric core and keeping a certain distance from the tab assembly 40;
then, the welding head 30 is moved downward so that the welding head 30 is attached to the top surface of the tab assembly 40;
and finally, welding and fixing the tab assembly 40 under the action of ultrasonic high-frequency vibration.
Compared with the prior art, the ultrasonic welding device for the lug assembly 40 has the advantages that the lug assembly 40 is pressed and the ultrasonic high-frequency vibration is utilized to weld and fix the lug assembly 40 through the matching of the welding seat 20 and the welding head 30, so that the welding process is reduced, the welding efficiency is improved, meanwhile, the insufficient welding of the lug assembly 40 can be effectively reduced, the connecting resistance is reduced, the connecting stability of the lug assembly 40 is improved, the charging and discharging of a battery module is effectively improved, and particularly, the excessive heating condition of the lug assembly 40 in the large-multiplying-power charging and discharging process is effectively improved; moreover, the use of copper bars and insulating parts in the laser welding process in the prior art can be reduced, the effective volume of the electrical property of the module is further increased, and the grouping ratio of the soft-package battery cell module is improved; in addition, the first welding teeth 201 and the second welding teeth 301 are arranged to be cylindrical bulges, so that stress concentration is difficult to form, the service lives of the welding head 30 and the welding seat 20 can be effectively prolonged, burrs of the welded tab assembly 40 can be reduced to the maximum extent, the groove edge of the tab assembly 40 is smoother, subsequent processes are reduced, and the processing efficiency is improved.
Further, the number of the first welding teeth 201 is multiple, and the multiple first welding teeth 201 are uniformly arranged at intervals, as shown in fig. 5. The number of the second welding teeth 301 is multiple, and the multiple second welding teeth 301 are uniformly arranged at intervals, as shown in fig. 3. By arranging the first welding teeth 201 and the second welding teeth 301 uniformly at intervals, stress can be uniformly applied, and stress concentration can be avoided.
Further, referring to fig. 5, the welding seat 20 includes a first mounting seat 21, a pressure conversion part 22, a pressure receiving part 23, and a first welding part 24 for bearing the tab assembly 40, which are connected in sequence. The cross-sectional areas of the first mounting seat 21, the pressure conversion portion 22, the pressure receiving portion 23, and the first welding portion 24 are sequentially reduced. Referring to fig. 3, the welding head 30 includes a second mounting seat 31, a connecting portion 32, a force-bearing portion 33, and a second welding portion 34 for cooperating with the first welding portion 24 to weld the tab assembly 40. The cross-sectional areas of the second mounting seat 31, the connecting portion 32, the bearing portion 33, and the second welding portion 34 are sequentially reduced. Through reducing the cross-sectional area of first mount pad 21, pressure conversion portion 22, pressure receiving portion 23 and first welding portion 24 in proper order, the cross-sectional area of second mount pad 31, connecting portion 32, load portion 33 and second welding portion 34 reduces in proper order for first welding portion 24 and second welding portion 34 can stretch into narrow space simultaneously under the prerequisite that satisfies bearing pressure, satisfy the welding of the utmost point ear subassembly 40 of not unidimensional.
Further, referring to fig. 5, the first mounting seat 21, the pressure conversion portion 22, the pressure receiving portion 23 and the first welding portion 24 are integrally formed and connected. As shown in fig. 3, the second mounting seat 31, the connecting portion 32, the bearing portion 33 and the second welding portion 34 are also integrally formed and connected, so that the manufacturing process is simple and the connection reliability is high. It should be noted that the first mounting seat 21, the pressure conversion portion 22, the pressure receiving portion 23, and the first welding portion 24, the second mounting seat 31, the connecting portion 32, the force bearing portion 33, and the second welding portion 34 may also be fixed by screws or other fasteners.
Further, referring to fig. 5, the end surface of the first welding portion 24 away from the pressure receiving portion 23 is provided with a first inclined step 241, and the arrangement of the first inclined step 241 can prevent the first welding tooth 201 on the first welding portion 24 from scratching the tab assembly 40. Preferably, the first inclined step 241 is gradually inclined outward in a direction away from the first welding tooth 201. As shown in fig. 3, an end surface of the second welding portion 34 away from the force bearing portion 33 is provided with a second inclined step 341. Due to the arrangement of the second inclined step 341, the second welding tooth 301 on the second welding part 34 can be prevented from scratching the tab assembly 40. Preferably, the second inclined step 341 is gradually inclined outward in a direction away from the second welding tooth 301.
Further, referring to fig. 3 to 4, an avoiding inclined surface 35 is disposed at a connection position between the second welding portion 34 and the force bearing portion 33. The avoiding slope 35 is provided to avoid interference between the first welding portion 24 and the second welding portion 34 when the welding head 30 is pressed on the welding seat 20. Preferably, the escape ramp 35 is arc-shaped.
Further, referring to fig. 3 to 4, the distance L between the second mounting seat 31 and the relief slope 35 gradually decreases in a direction away from the second welding tooth 301, that is, the relief slope 35 gradually inclines toward the second mounting seat 31 in a direction from the top to the bottom, so as to avoid the contact between the first welding portion 24 and the second welding portion 34 to the maximum extent.
Further, referring to fig. 2, the width of the first welding portion 24 is greater than the width of the second welding portion 34, so that the first welding portion 24 can provide a sufficient supporting surface for the tab assembly 40, and at the same time, the installation and the adjustment are convenient. Preferably, the width of the first weld 24 is 3mm to 5mm greater than the width of the second weld 34, and may be, for example, 3mm, 4mm, or 5 mm. And the width of the second welding part 34 is smaller than that of the welding zone of the tab assembly 40 in order that the second welding part 34 may extend into the welding zone of the tab assembly 40.
Further, referring to fig. 2 to fig. 6, the peripheral edge of the first welding portion 24 and the end surface of the first welding portion 24 away from the second welding portion 34 are coated with a first insulating layer 242, and the first insulating layer 242 is disposed to prevent other non-welding surfaces of the first welding portion 24 from contacting other to-be-welded tab assemblies 40 of the battery module to cause a short circuit of the battery module. The peripheral side edge of the second welding portion 34 and the end face of the second welding portion 34 far away from the first welding portion 24 are all wrapped with a second insulating layer 342, and the arrangement of the second insulating layer 342 can avoid the contact between other non-welding surfaces of the second welding portion 34 and other to-be-welded tab assemblies 40 of the battery module to cause the short circuit of the battery module.
Further, referring to fig. 2 and 5, the first mounting base 21 is provided with a mounting hole 211, and the mounting hole 211 is used for cooperating with a fastener (not shown) to mount the first mounting base 21 on a welding device (not shown). To avoid the fastener from protruding beyond the surface of the first mounting block 21, the mounting hole 211 is counter bored so that the fastener can be fully seated within the mounting hole 211. Preferably, the fastening member may be a screw, and the mounting hole 211 may be a screw hole. The inner wall of the mounting hole 211 is coated with a third insulating layer (not shown), which may be coated on the inner wall of the mounting hole 211 by direct coating.
Further, referring to fig. 2, the second mounting base 31 includes a mounting surface 311 for mounting a ring resonator plate (not shown) and a mounting boss 312 protruding from the mounting surface 311, and the bonding head 30 can be connected and fixed to a bonding apparatus by screws (not shown). The mounting boss 312 is used for mounting a screw. The welding head 30 and the welding seat 20 can be installed on the welding equipment at the same time or on the same moving platform, so that the relative position of the welding head 30 and the welding seat 20 can be ensured, and the synchronism of feeding, withdrawing and returning of the welding head 30 and the welding seat 20 can be ensured.
Specific examples are given below of the contour shape of the solder seat 20.
Example one
According to the first embodiment of the present invention, as shown in fig. 5, the welding seat 20 has a contour shape of L, which can be extended into a narrow space.
Example two
According to the second embodiment of the present invention, as shown in fig. 6, the contour of the welding seat 20 can also be I-shaped, which is simple in structure, strong in bearing capacity, and can effectively prolong the service life.
Referring to fig. 8 to 11, the present invention further provides a tab assembly 40 including at least two tabs 41. The tabs 41 are stacked in sequence and welded and fixed by the ultrasonic welding device. Wherein, the surface of the tab 41 for contacting with the welding seat 20 is formed with a first cylindrical groove 401 matched with the first welding tooth 201, and the surface of the tab 41 for contacting with the welding head 30 is formed with a second cylindrical groove 402 matched with the second welding tooth 301. Through utilizing above-mentioned ultrasonic welding device welded fastening for the utmost point ear 41 surface of the superiors forms first cylindrical recess 401, and utmost point ear 41 surface of the lower floor forms second cylindrical recess 402, thereby makes the recess edge that forms more level and more smooth, can effectively reduce subsequent handling, improves machining efficiency.
Further, referring to fig. 8, the number of the first cylindrical grooves 401 is multiple, and the plurality of first cylindrical grooves 401 are uniformly arranged at intervals, as shown in fig. 9 to 10, the number of the second cylindrical grooves 402 is multiple, and the plurality of second cylindrical grooves 402 are uniformly arranged at intervals. By uniformly arranging the first cylindrical grooves 401 and the second cylindrical grooves 402 at intervals, the stress is uniform, and the stress concentration is avoided.
Further, each tab 41 comprises a connection region 411 and a welding region 412 connected with the connection region 411, the connection region 411 of each tab 41 is used for being connected with an electrode of each battery cell, and the welding regions 412 of each tab 41 are sequentially overlapped up and down, so that the tabs can be directly pressed and welded and fixed when the ultrasonic welding device is used for welding.
Specific examples are given below of the shape of the tab 41.
Example one
According to the first embodiment of the present invention, as shown in fig. 8 to 9, the connection region 411 and the welding region 412 are formed in L shapes, the connection region 411 and the welding region 412 are vertically disposed, and the stacked tab assembly 40 may have a U shape.
Example two
According to the second embodiment of the present invention, as shown in fig. 11, the connection region 411 and the welding region 412 form an S-shape, so that different setting requirements can be satisfied.
Further, the tab 41 may be a positive tab 41 or a negative tab 41. When the tab 41 is a positive tab 41, the tab 41 may be an aluminum sheet, and when the tab 41 is a negative tab 41, the tab 41 may be a copper sheet.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The ultrasonic welding device of the tab assembly comprises a welding seat and a welding head arranged above the welding seat; the method is characterized in that: the welding head is provided with a first welding tooth, the welding head is provided with a second welding tooth, and the first welding tooth and the second welding tooth are cylindrical bulges.
2. The ultrasonic welding apparatus for a tab assembly of claim 1 wherein: the number of the first welding teeth is multiple, the first welding teeth are uniformly distributed at intervals, the number of the second welding teeth is multiple, and the second welding teeth are uniformly distributed at intervals.
3. The ultrasonic welding apparatus for a tab assembly of claim 1 wherein: the welding seat comprises a first mounting seat, a pressure conversion part, a pressure bearing part and a first welding part which are sequentially connected, wherein the first welding part is used for bearing the lug assembly, and the cross sectional areas of the first mounting seat, the pressure conversion part, the pressure bearing part and the first welding part are sequentially reduced; the bonding tool including the second mount pad, connecting portion, load portion that connect gradually and be used for with the cooperation of first weld part is in order to weld tab assembly's second weld part, the second mount pad connecting portion load portion and the cross-sectional area of second weld part reduces in proper order.
4. An ultrasonic welding apparatus for a tab assembly as set forth in claim 3 wherein: the end face, far away from the pressure bearing part, of the first welding part is provided with a first inclined step, and/or the end face, far away from the force bearing part, of the second welding part is provided with a second inclined step.
5. An ultrasonic welding apparatus for a tab assembly as set forth in claim 3 wherein: an avoiding inclined plane is arranged at the joint between the second welding part and the bearing part.
6. An ultrasonic welding apparatus for a tab assembly as set forth in claim 3 wherein: the width of the first welding part is larger than that of the second welding part.
7. An ultrasonic welding apparatus for a tab assembly as claimed in any one of claims 3 to 6, wherein: the lateral margin all around of first welding part and first welding part is kept away from the terminal surface of second welding part all has the cladding of first insulating layer, and/or the lateral margin all around of second welding part and the second welding part is kept away from the terminal surface of first welding part all has the cladding of second insulating layer.
8. The tab assembly comprises at least two tabs; the method is characterized in that: the tabs are sequentially stacked and welded and fixed by the ultrasonic welding device as claimed in any one of claims 1 to 7, a first cylindrical groove matched with the first welding tooth is formed on the surface of the tab contacted with the welding seat, and a second cylindrical groove matched with the second welding tooth is formed on the surface of the tab contacted with the welding head.
9. The tab assembly of claim 8 wherein: the first cylindrical grooves are distributed uniformly at intervals, the second cylindrical grooves are distributed uniformly at intervals, and the first cylindrical grooves are distributed uniformly at intervals.
10. The tab assembly of claim 8 wherein each of said tabs includes a connection region and a weld region connected to said connection region, said connection region being L or S-shaped relative to said weld region.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921904755.9U CN211072230U (en) | 2019-11-06 | 2019-11-06 | Utmost point ear subassembly and ultrasonic welding device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921904755.9U CN211072230U (en) | 2019-11-06 | 2019-11-06 | Utmost point ear subassembly and ultrasonic welding device thereof |
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| CN112792449A (en) * | 2021-03-04 | 2021-05-14 | 大连中比动力电池有限公司 | Ultrasonic welding device for cylindrical battery cell |
| CN113601002A (en) * | 2021-08-13 | 2021-11-05 | 浙江宇跃智能科技有限公司 | Burr-free lug ultrasonic welding equipment with battery diaphragm protection capability |
| CN114552141A (en) * | 2021-12-21 | 2022-05-27 | 万向一二三股份公司 | Ultrasonic welding method for soft package battery tab |
| CN115837510A (en) * | 2021-11-09 | 2023-03-24 | 宁德时代新能源科技股份有限公司 | Tab welding method, welding tool, battery monomer, battery and power utilization device |
| WO2024031761A1 (en) * | 2022-08-09 | 2024-02-15 | 扬州纳力新材料科技有限公司 | Welding head device for transition welding |
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| CN112792449A (en) * | 2021-03-04 | 2021-05-14 | 大连中比动力电池有限公司 | Ultrasonic welding device for cylindrical battery cell |
| CN112792449B (en) * | 2021-03-04 | 2023-12-22 | 南京比飞达新能源科技有限公司 | Cylindrical cell ultrasonic welding device |
| CN113601002A (en) * | 2021-08-13 | 2021-11-05 | 浙江宇跃智能科技有限公司 | Burr-free lug ultrasonic welding equipment with battery diaphragm protection capability |
| CN113601002B (en) * | 2021-08-13 | 2022-08-30 | 浙江宇跃智能科技有限公司 | Burr-free lug ultrasonic welding equipment with battery diaphragm protection capability |
| CN115837510A (en) * | 2021-11-09 | 2023-03-24 | 宁德时代新能源科技股份有限公司 | Tab welding method, welding tool, battery monomer, battery and power utilization device |
| CN115837510B (en) * | 2021-11-09 | 2024-01-16 | 宁德时代新能源科技股份有限公司 | Lug welding method, welding tool, battery cell, battery and electricity utilization device |
| CN114552141A (en) * | 2021-12-21 | 2022-05-27 | 万向一二三股份公司 | Ultrasonic welding method for soft package battery tab |
| WO2024031761A1 (en) * | 2022-08-09 | 2024-02-15 | 扬州纳力新材料科技有限公司 | Welding head device for transition welding |
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