CN115070253A - Soldering lug for welding strip, combined welding strip and combined welding strip string - Google Patents
Soldering lug for welding strip, combined welding strip and combined welding strip string Download PDFInfo
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- CN115070253A CN115070253A CN202210943579.XA CN202210943579A CN115070253A CN 115070253 A CN115070253 A CN 115070253A CN 202210943579 A CN202210943579 A CN 202210943579A CN 115070253 A CN115070253 A CN 115070253A
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- strip
- soldering
- solder
- welding
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- 238000005476 soldering Methods 0.000 title claims abstract description 134
- 238000003466 welding Methods 0.000 title claims abstract description 125
- 229910000679 solder Inorganic materials 0.000 claims abstract description 141
- 239000000463 material Substances 0.000 claims abstract description 32
- 230000004907 flux Effects 0.000 claims abstract description 22
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 5
- 229910052718 tin Inorganic materials 0.000 description 15
- 239000000758 substrate Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
- B23K35/262—Sn as the principal constituent
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
The invention aims to provide a soldering lug for a soldering strip, a combined soldering strip and a combined soldering strip string aiming at the defects that a soldering strip with a structure in the prior art is easy to generate insufficient solder joint, insufficient soldering area and the like at a soldering position due to a very thin tinned layer serving as a soldering material, and the like; the combined welding strip comprises a welding strip base body and the soldering lug, wherein at least one welding area is arranged on the surface of the welding strip base body, the soldering lug is positioned in the welding area and fixedly connected with the surface of the welding strip base body, the soldering lug adopting the structure of the invention is provided with the soldering flux core in the core part, and the soldering lug outer skin is used as the soldering material and can provide the material and the soldering flux core required by welding, so that the welding operation is simple and convenient, the welding is easy, the combined welding strip adopting the structure of the invention is adopted, the soldering lug is melted to serve as the soldering material during the welding, the material of the soldering material is sufficient during the welding, the soldering flux core is helped to weld, and a full welding area can be obtained.
Description
Technical Field
The invention relates to a soldering lug for a soldering strip, a combined soldering strip and a combined soldering strip string.
Background
The photovoltaic solder strip (solder strip for short) is also called tinned copper strip or tinned copper strip and is used for welding a plurality of solar cells in series/parallel connection. As shown in fig. 1, the conventional solder strip includes a base strip 11 and a tin plating layer 12, and the base strip 11 is typically a copper base strip having a tin plating layer on an outer surface thereof. The photovoltaic solder strip is divided into a bus bar solder strip (bus bar for short) and an interconnector solder strip (interconnector for short), is used for connecting solar cells and plays an important role of a wire between the solar cells. Photovoltaic solder strips are generally thin, have different shapes and have higher requirements on precision and quality. The photovoltaic solder strip is an important connecting material in the process of welding the solar cell, the quality of the solder strip directly affects the collection efficiency of the electric energy of the photovoltaic module, and the power of the photovoltaic module is greatly affected. The welding strip must be firmly welded in the process of serially connecting the battery pieces, so that the phenomenon of false welding of insufficient welding is avoided.
As shown in fig. 2, the welding principle of the conventional solder strip is to melt a thin tin-plated layer wrapped around the solder strip itself to weld the solar cell welding part 2 and the conventional solder strip 3 together, and since the solar cell is easily crushed during lamination when the solder strip is too thick, the base bands 11 and the tin-plated layers 12 of the solar cell welding part 2 and the conventional solder strip 3 are very thin, the base bands 11 are usually only about 0.05-0.5mm, and the single layer of the tin-plated layer 12 is usually only about 0.015mm, so that very little tin material is used for welding. Because the tin-plated layer 12 is too thin, the situation that the welding surface is welded firmly only in a few points or only a part of the welding surface is welded firmly, the other parts are not connected and the like, so that insufficient welding surface or the like is caused, a defective welding area 4 shown in fig. 2 is formed, the reject ratio caused by the defect can reach 0.9%, and the yield is seriously influenced.
Disclosure of Invention
The invention aims to provide a soldering lug for a soldering strip, a combined soldering strip and a combined soldering strip string, aiming at the defects that the soldering strip with the prior art structure is easy to generate insufficient soldering, insufficient soldering area and the like at a soldering position during soldering because a tin plating layer as a soldering material is very thin.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a soldering lug for solder strip, its includes soldering lug crust and scaling powder core, the soldering lug is lamellar, the soldering lug crust is used for as the material of welding electronic component, it is the tin alloy to weld the material.
The soldering flux core is wrapped in the core part by the soldering lug outer skin, and the soldering flux core is a washing-free soldering flux core, or the thickness of the soldering lug is 0.1-0.3 mm.
The combined welding strip comprises a welding strip base body and a welding piece, wherein the welding piece adopts one of the above items, the welding strip base body comprises a base band and a tin coating, the tin coating is coated on the surface of the base band to form the surface of the welding strip base body, at least one welding area is arranged on the surface of the welding strip base body, and the welding piece is positioned in the welding area and fixedly connected with the surface of the welding strip base body.
The welding strip base body is in a sheet shape, and the welding area is located on the surface of the sheet.
The soldering lug and the solder strip substrate are fixedly connected through soldering paste solidification, and the soldering paste is tin alloy soldering paste; at normal temperature, the soldering paste is solidified to lead the soldering paste and the soldering lug to be adhered together, and when welding and heating are carried out, the soldering paste and the soldering lug are melted together and also used as welding materials.
The plane size of the soldering lug is smaller than the boundary size of the welding area.
The thickness of the base band is 0.05-0.5mm, the thickness of a single layer of the tin coating is 0.005-0.03mm, and the thickness of the soldering lug is 0.1-0.3 mm.
And a hollow area is arranged on the welding strip base body between the adjacent welding sheets and used for releasing metal stress during welding.
The utility model provides a modular solder strip cluster, its includes two fixed bands and at least one aforementioned each item the modular solder strip, two the fixed band respectively with every modular solder strip's both ends fixed connection of solder strip base member, be provided with a plurality of locating holes along its length direction on the fixed band, the locating hole is used for the transmission and the location of modular solder strip.
The fixing belt and the base belt which are integrally connected are manufactured by adopting the same base belt in a punch forming mode, then a tin coating is arranged outside the fixing belt and the base belt which are integrally connected, and then the soldering lug is fixedly arranged on the surface of the base body of the soldering belt.
The invention has the beneficial effects that:
1. the soldering lug adopting the structure of the invention has a flat section, so that the soldering lug can have a good contact surface with the soldering strip, is easy to integrate with the soldering strip, and is easy to penetrate heat and uniform in heat penetration during welding. The soldering lug adopting the structure of the invention adopts the sheet shape, the thickness of the soldering lug is very thin, and the battery piece cannot crack when being welded. The soldering lug with the structure of the invention is provided with the soldering flux core in the core part, and the soldering lug outer skin is used as the soldering material, so that the soldering lug is melted to serve as the soldering material and the soldering flux core during soldering, thereby providing the material and the soldering flux core required by soldering, and ensuring that the soldering operation is simple and convenient and the soldering is easy.
By adopting the combined welding strip with the structure, as the soldering lug is arranged on the surface of the welding strip, and the soldering lug is melted to serve as a welding material during welding, the welding material is sufficient in material and is beneficial to the flux core to assist welding, a full welding area can be obtained, the defects in the welding process of the welding strip are within one million, and the yield and the welding quality of welding are greatly improved; meanwhile, as the soldering lug is arranged only on the welding area, the soldering lug is melted and melted to be used as a soldering material during welding, the soldering material is only added on the welding area, and the thickness of the tin layer is not increased at other positions, so that the welding firmness is increased, the thickness of the welding strip matrix is not increased, and the photovoltaic module is not easy to crush. The soldering paste for connecting the soldering lug and the solder strip substrate is not only a binder of the soldering lug and the solder strip substrate, but also a soldering material, can be melted together with the soldering lug, and can not generate redundant substances.
By adopting the combined type welding strip string with the structure, a plurality of combined type welding strips are connected into a whole through two parallel fixing bands, and the fixing holes are formed in the fixing bands along the length direction of the fixing bands, so that the welding strip string can be fed and conveyed through automatic equipment, and the welding efficiency can be improved.
Drawings
FIG. 1 is a schematic thickness-wise cross-sectional view of a prior art solder strip structure;
FIG. 2 is a schematic view of a welding portion with a welding defect after a welding strip and a solar cell are welded in the prior art;
FIG. 3 is a schematic view of a welding position after the combined solder strip of the present invention is welded to a solar cell;
FIG. 4 is a schematic structural diagram of an embodiment of the composite solder strip of the present invention;
FIG. 5 is a schematic sectional view taken along line A-A in FIG. 4;
FIG. 6 is a schematic structural diagram of a bonding pad of the present invention;
FIG. 7 is a schematic structural view of another embodiment of the composite solder strip of the present invention;
FIG. 8 is a schematic structural view of another embodiment of the composite solder strip of the present invention;
FIG. 9 is a schematic structural view of another embodiment of the composite solder strip of the present invention;
FIG. 10 is a schematic structural view of another embodiment of the composite solder strip of the present invention;
FIG. 11 is a schematic view of another embodiment of the composite solder strip of the present invention;
FIG. 12 is a combined solder ribbon cluster formed from the combined solder ribbon of FIG. 4;
fig. 13 is a combined solder ribbon cluster formed from the combined solder ribbon of fig. 7.
Description of the reference numerals:
1-traditional solder strip; 11-baseband; 12-tin plating; 2-solar cell welding part; 3-driving the welding strip; 4-a defective weld zone; 5-full weld zone; 6-combined welding strip; 61-solder strip base; 62-soldering lug; 63-a hollow-out area; 64-solder paste; 621-bonding pad skin; 622-flux core; 7-a second combined solder strip; 71-a second solder strip substrate; 72 a second hollow structure; 8-a third combined welding strip; 81-third solder strip base body; 9-a fourth combined solder strip; 91-fourth solder strip substrate; 10-a fifth combined solder strip; 101-a fifth solder strip substrate; 11-a sixth combined solder strip; 111-sixth solder strip substrate; 12-fixing the belt; 121-positioning holes.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 6, a solder pad 62 for solder ribbon includes a pad outer skin 621 and a flux core 622, or may include only the pad outer skin and no flux core. The soldering lug 62 is in the form of a square, rectangular, circular or other sheet designed by the process, and the surface of the sheet can be a plane or a curved surface to facilitate welding or bonding. The pad sheath 621 is a solder material for soldering an electronic component, and the composition of the solder material is the same as the material or the type of the object to be soldered. The tab skin 621 is preferably a tin alloy such as 96.5% Sn +3% Ag + 0.5% Cu or 99% Sn + 0.3% Ag + 0.7% Cu. The flux core 622 is wrapped in the core part by the soldering lug outer skin 621, the flux core is preferably washing-free flux, and after the power-assisted soldering is completed, residues of the flux core 622 disappear so as to prevent the soldering part from being polluted or hard residue from being generated to cause hidden cracking of the battery lug. The process of producing tab 62 is preferred (and may be processed in other ways): the ordinary welding wire with the flux core in the core part in the prior art is cut into appropriate small sections, the flux core is naturally sealed by the two cut ends of the small sections of the welding wire, then the sealed two ends are blocked, the cylindrical outer surface of the small sections of the welding wire is pressed, and the welding piece 62 is formed by pressing the cylindrical outer surface of the small sections of the welding wire into a rectangular or square sheet.
As shown in fig. 4 and 5, the combined solder strip 6 of embodiment 1 comprises a solder strip base 61 and a solder pad 62, wherein the solder strip base 61 comprises a base strip 11 and a tin-plated layer 12, the tin-plated layer 12 is coated on the surface of the base strip 11, the base strip is preferably made of a copper strip, and has excellent ductility and electrical conductivity, and the solder strip base 61 has the same structure as the conventional solder strip 1. The solder strip substrate 61 is in a sheet shape, and the specific surface shape, the part for arranging the soldering lug and the number of the soldering lugs are determined according to the process requirements. The welding strip base body 61 between the soldering lugs 62 close to each other in distance is provided with a hollowed-out area 63 for releasing metal stress during welding, the hollowed-out structure can be a long hole shape or a cross hole shape, or a plurality of long holes with different lengths are arranged in parallel, welding deformation can be effectively reduced, and the flatness of the battery piece after welding is guaranteed.
The portion of the solder lug 62 fixedly disposed on the outer surface of the tin-plated layer 12 of the solder strip base 61, which is to be soldered, is referred to as a soldering region for descriptive convenience, and the specific soldering portion is determined according to the specific cell structure and process. The soldering lug 62 and the solder strip base body 61 are fixed through a soldering paste 64, and the soldering paste 64 is a tin alloy, such as Sn64Bi35Ag1, and can also be other materials with the same function; at normal temperature, the solder paste 64 solidifies to stick the two together, and upon heating of soldering, the solder paste 64 and the solder lug 62 melt together to serve as a solder material. The plane size of the soldering lug is preferably smaller than the boundary size of the welding area, so that when welding is carried out, the soldering lug is too large in size, and soldering tin overflows a welding part after being melted, so that the pollution of the battery piece is caused or the hidden crack of the battery piece is caused. The thicknesses of the soldering lug 62, the base band 11 and the tin coating 12 for welding the photovoltaic module are strictly controlled within a certain range so as to ensure that the soldering is sufficient and firm during soldering and the total thickness after soldering is reduced to the minimum so as to avoid the fragmentation of the module during lamination, and generally the thickness of the base band is 0.05-0.5mm, the single-layer thickness of the tin coating is 0.005-0.03mm, and the thickness of the soldering lug is 0.1-0.3 mm.
The solder ribbon matrix described above may be formed in the general shape of the following examples, but is not limited thereto:
in embodiment 1, as shown in fig. 7, the second combined solder strip 7 includes a second solder strip base 71 and 6 solder pads 62, the second solder strip base is in a strip shape, and has protrusions located on two sides of the solder strip base along a length direction thereof, the protrusions on the two sides are arranged oppositely, a solder region is located at an end of each protrusion, the solder pads are fixedly arranged at the ends of the protrusions, a hollow structure is arranged on the solder strip base between the two oppositely arranged protrusions, in this embodiment, 3 or 5 second hollow structures 72 are arranged on the second solder strip base 71, and a shape thereof is an oblong hole. The material of the second solder ribbon base 71 corresponds to the solder ribbon base 61 described above. The soldering lug 62 is in the shape of a square thin sheet, and the structure and material are the same as those described above.
Example 2, as shown in fig. 8, the third composite solder strip 8 includes a third solder strip base 81 and a plurality of solder tabs 62. The difference between this embodiment and embodiment 1 is that the third solder strip substrate 81 is provided with protrusions for disposing the soldering lugs 62 at intervals on one side of the solder strip, that is, one soldering lug 62 is disposed on each protrusion, and it is not necessary to provide a hollowed-out structure because the protrusions are disposed on one side.
Example 3, as shown in fig. 9, the fourth composite solder strip 9 includes a fourth solder strip base 91 and a plurality of solder tabs 62. This embodiment is different from embodiment 2 in that a fourth solder ribbon base 91
The strip is in the shape of a strip, two sides of the strip of the welding strip substrate are straight, and at least two welding sheets 62 are arranged on the welding strip substrate at intervals.
Example 4, as shown in fig. 10, the fifth composite solder strip 10 includes a fifth type solder strip base 101 and 2 solder pads 62. The fifth solder strip substrate 101 is a deformation of the fourth solder strip substrate, in which both ends of the solder strip substrate strip are bent to opposite sides, the bending angles of both ends are the same, the bending angles depend on the specific conditions of the soldering, preferably both ends are bent to opposite directions by 90 °, and 1 solder bump 62 is disposed at each bent end.
Example 5, as shown in fig. 11, the sixth composite solder strip 11 includes a sixth solder strip base 111 and 2 solder tabs 62. This embodiment is different from embodiment 4 in that the both ends of the sixth solder ribbon base 111 are bent at different angles, preferably, one end is bent at 90 ° and the other end is bent at 30 °.
According to a further design of the combined solder strip according to the present invention, as shown in fig. 12, a combined solder strip string is obtained, comprising a combined solder strip 6 and a fixing strip 12. Two fixed bands 12 are arranged at intervals and are respectively connected with two ends of a welding strip base body 61 of the multi-group combined welding strip 6 into a whole, the multi-group combined welding strip 6 is arranged at intervals in parallel, and the combined welding strip of embodiment 4 is adopted. Preferably, the fixing band 12 and the plurality of base bands 11 are formed by stamping the same base band 11, and are simultaneously tinned, and then are bonded with the soldering lug 62 one by one. Preferably, the two fixing bands 12 are provided with positioning holes at intervals along the length direction of the fixing bands, the positioning holes on the two fixing bands are arranged in pairs, and the positioning holes are used for being positioned and connected with an automatic welding band feeding device when being supplied with welding band strings, so that the automatic transmission and positioning of the combined welding band strings are realized. For example, a conveying device of the automatic solder strip feeding device is provided with a cylindrical protrusion, and the protrusion is matched and connected with a positioning hole in a fixing belt to realize solder strip conveying. When the combined type welding strip string is used, the transmission mechanism positions and transmits the combined type welding strip string to a designated position according to the positioning hole 121, the cutter and other mechanisms are adopted to cut the next combined type welding strip 6 from the combined type welding strip string, and then the combined type welding strip string is placed to a working position by a manipulator and the like to weld the solar cell. It is not the focus of the present invention, but is only a specific use scenario of the solder strip of the present invention to facilitate understanding of the present invention, and therefore, will not be described herein in detail.
Of course, the structure of each combined welding strip between the two fixed strips can be the same or different, and the arrangement design is carried out according to the general requirements of specific welders.
In conclusion, when the soldering lug for the solder strip, the combined solder strip and the combined solder strip string are used for soldering the solar cell, the soldering quality and the qualification rate are very high. As shown in FIG. 3, the welding zone 5 is very full due to the sufficient welding material when the welding strip of the present invention is used for welding.
The combined welding strip adopting the structure of the invention is suitable for various shapes and can be used for all welding strip types.
Claims (10)
1. The soldering lug for the solder strip is characterized by comprising a soldering lug outer skin and a soldering flux core, wherein the soldering lug is in a sheet shape, the soldering lug outer skin is used as a soldering material for soldering an electronic element, and the soldering material is a tin alloy.
2. The bonding pad for solder strip according to claim 1, wherein the flux core is wrapped by a bonding pad sheath at the core part, and the flux core is a no-clean flux core, or the thickness of the bonding pad is 0.1-0.3 mm.
3. A combined solder strip, comprising a solder strip base body and a solder piece, wherein the solder piece of any one of claims 1-2 is adopted, the solder strip base body comprises a base strip and a tin coating, the tin coating is coated on the surface of the base strip to form a solder strip base body surface, the solder strip base body surface is provided with at least one welding area, and the solder piece is positioned in the welding area and fixedly connected with the solder strip base body surface.
4. The composite solder strip of claim 3, wherein the solder strip base is in the form of a sheet and the solder area is located on a surface of the sheet.
5. The combined solder strip of claim 3 or 4, wherein the soldering lug and the solder strip base body are fixedly connected through solder paste solidification, and the solder paste is tin alloy solder paste; at normal temperature, the soldering paste is solidified to lead the soldering paste and the soldering lug to be adhered together, and when welding and heating are carried out, the soldering paste and the soldering lug are melted together and also used as welding materials.
6. The composite solder strip of claim 3, wherein the planar dimensions of the solder tabs are smaller than the boundary dimensions of the solder areas.
7. The composite solder strip of claim 3, wherein the thickness of the base strip is 0.05-0.5mm, the single layer thickness of the tin-plating layer is 0.005-0.03mm, and the thickness of the solder piece is 0.1-0.3 mm.
8. The combined solder strip of claim 3, wherein a hollowed-out area is provided on the solder strip base body between adjacent soldering lugs for releasing metal stress during soldering.
9. A combined solder ribbon bunch comprising two fixing tapes and at least one combined solder ribbon according to any one of claims 3 to 8, wherein the two fixing tapes are fixedly connected to two ends of a solder ribbon base body of each combined solder ribbon, respectively, and a plurality of positioning holes are formed in the fixing tapes along the length direction of the fixing tapes, and the positioning holes are used for conveying and positioning the combined solder ribbon.
10. The combined type welding strip string as claimed in claim 9, wherein the same base strip is punched and formed to form the fixing strip and the base strip which are integrally connected, and then a tin coating is disposed outside the fixing strip and the base strip which are integrally connected, and then the soldering lug is fixedly disposed on the surface of the welding strip base body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210943579.XA CN115070253A (en) | 2022-08-08 | 2022-08-08 | Soldering lug for welding strip, combined welding strip and combined welding strip string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210943579.XA CN115070253A (en) | 2022-08-08 | 2022-08-08 | Soldering lug for welding strip, combined welding strip and combined welding strip string |
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| CN115070253A true CN115070253A (en) | 2022-09-20 |
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| CN202210943579.XA Pending CN115070253A (en) | 2022-08-08 | 2022-08-08 | Soldering lug for welding strip, combined welding strip and combined welding strip string |
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| CN (1) | CN115070253A (en) |
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