CN116197610A - Copper-clad aluminum composite welding strip and preparation method thereof - Google Patents
Copper-clad aluminum composite welding strip and preparation method thereof Download PDFInfo
- Publication number
- CN116197610A CN116197610A CN202211618211.2A CN202211618211A CN116197610A CN 116197610 A CN116197610 A CN 116197610A CN 202211618211 A CN202211618211 A CN 202211618211A CN 116197610 A CN116197610 A CN 116197610A
- Authority
- CN
- China
- Prior art keywords
- copper
- composite
- strip
- clad aluminum
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 101
- 238000003466 welding Methods 0.000 title claims abstract description 64
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 91
- 229910052802 copper Inorganic materials 0.000 claims abstract description 67
- 239000010949 copper Substances 0.000 claims abstract description 67
- 229910000679 solder Inorganic materials 0.000 claims abstract description 27
- 238000000137 annealing Methods 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000005253 cladding Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 5
- 238000005382 thermal cycling Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 229910001128 Sn alloy Inorganic materials 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000007728 cost analysis Methods 0.000 description 2
- 210000003464 cuspid Anatomy 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0512—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module made of a particular material or composition of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/08—Tin or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
Abstract
The invention relates to the technical field of photovoltaic solder strips, and discloses a copper-clad aluminum composite solder strip and a preparation method thereof. The preparation method of the copper-clad aluminum composite welding strip comprises the following steps: step 1, respectively carrying out surface impurity removal on a copper strip and an aluminum rod, coating a substrate rod by the copper strip, and carrying out welding and polishing on a gap of the copper strip to obtain a composite copper rod; step 2, carrying out multi-pass drawing on the composite copper rod to obtain a composite copper wire; and 3, drawing the composite copper wire to a specified specification, and heating, annealing and tinning the drawn composite copper wire to obtain the composite welding strip. According to the invention, the oxygen-free copper base material is replaced by the copper-clad aluminum composite material, the metallurgical bonding of copper and aluminum is realized through cladding welding and multi-pass drawing, and the composite welding strip with the same performance as oxygen-free copper is achieved after on-line annealing tinning. The length of the composite welding strip is 1.5-2.5 times of that of a pure copper wire under the condition that the wire diameter and the weight are equal, and the cost per kilogram can be reduced by 15-20%.
Description
Technical Field
The invention relates to the technical field of photovoltaic solder strips, in particular to a copper-clad aluminum composite solder strip and a preparation method thereof.
Background
Solar energy is inexhaustible clean energy, and along with the development of the solar energy industry, the photovoltaic installation quantity is increased all the way. With the continuous innovation of technology, the electricity cost is continuously reduced, the demand of flat-price internet surfing is also increased, and how to reduce the cost and increase the efficiency becomes industry-oriented big matters. At the photovoltaic module end, the conventional photovoltaic welding strip is made of oxygen-free copper, and the photovoltaic welding strip accounts for 2% -3% in cost, but has huge volume, so that the cost of the photovoltaic welding strip is greatly reduced.
The photovoltaic welding strip is divided into an interconnection strip and a converging strip, and is matched with the assembly battery for use, and the photovoltaic welding strip is characterized in that tin alloy is coated on the surface of oxygen-free copper, so that the photovoltaic welding strip has the effects of conducting electricity and preventing oxidization. With the continual updating and iteration of the current assembly battery technology, the requirements of Topcon, heterojunction, IBC (inter-band capacitance) and welding strips are also constantly changing. On the premise of meeting the conductivity, the conventional oxygen-free copper welding strip is replaced by the low-cost welding strip, so that the cost of the welding strip is controlled at a low level, the welding strip is high-quality and low-cost, and the problem to be solved is urgent.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to provide the copper-clad aluminum composite welding strip and the preparation method thereof, and the prepared copper-clad aluminum composite welding strip can achieve the same performance as oxygen-free copper, and the length is 1.5-2.5 times of that of a pure copper wire under the condition that the wire diameter and the weight are equal, and the cost per kilogram can be reduced by 15% -20%.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
The preparation method of the copper-clad aluminum composite welding strip comprises the following steps:
step 1, respectively carrying out surface impurity removal on a copper strip and an aluminum rod, coating a substrate rod by the copper strip, and carrying out welding and polishing on a gap of the copper strip to obtain a composite copper rod;
step 2, carrying out multi-pass drawing on the composite copper rod, and obtaining a composite copper wire after flaw detection;
and 3, drawing the composite copper wire to a specified specification, and heating, annealing and tinning the drawn composite copper wire to obtain the composite welding strip.
Preferably, the diameter of the composite copper rod in the step 1 is smaller than 15mm, and the volume ratio of copper in the composite copper rod is 10% -60%.
Preferably, the welding in the step 1 is nitrogen shielded welding.
Preferably, the reduction ratio of drawing in each pass in the step 2 is 4% -5%, and the wire diameter of the composite copper wire is 3mm.
Preferably, the multi-pass drawing in the step 2 comprises four-stage drawing, and the die proportions of each stage of drawing are respectively as follows:
first stage: 14.2-13.75-13.30-12.85-12.4-11.95-11.50-11.05-10.6-10.2-9.8;
second stage: 9.5-9.0-8.6-8.3-8.0-7.7-7.4-7.1-6.8-6.5-6.2;
third stage: 5.9-5.6-5.3-5.0-4.7-4.4-4.2-4.0-3.8-3.6-3.4;
fourth stage: 3.2-3.0;
the unit of the ratio value of the die is mm.
Preferably, the annealing in step 3 is performed by a short-circuit annealing machine.
Further preferably, the annealing temperature in step 3 is 280-320 ℃.
Preferably, the tin layer plated in step 3 has a thickness of 0.025mm to 0.035mm.
Preferably, the copper strip surface is coated with one or more of graphene or carbon fiber powder.
The composite welding strip prepared by the preparation method of the copper-clad aluminum composite welding strip.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the oxygen-free copper base material is replaced by the copper-clad aluminum composite material, the metallurgical bonding of copper and aluminum is realized through cladding welding and multi-pass drawing, and the composite welding strip with the same performance as oxygen-free copper is achieved after on-line annealing tinning. The length of the composite welding strip is 1.5-2.5 times of that of a pure copper wire under the condition that the wire diameter and the weight are equal, and the cost per kilogram can be reduced by 15-20%.
According to the preparation method, forced deformation is realized through the die during pass drawing, so that plastic deformation is generated at the interface of the copper-aluminum material, the copper-aluminum material and the copper-aluminum material are meshed with each other, and the combination of bimetal is realized through canine teeth interlacing. The existence of the bonding layer ensures the common deformation of the composite material, the strength of the bonding layer is improved along with the continuous process of the pass drawing, the tensile ductility of the material is continuously improved, and the composite welding strip has excellent mechanical properties.
Drawings
The invention will now be described in further detail with reference to the drawings and to specific examples.
FIG. 1 is a flow chart of a copper-clad aluminum composite solder strip preparation process;
FIG. 2 is a flow chart of a cladding welding process;
FIG. 3 is an EL plot of a thermal cycling test of the composite solder strip of the present invention;
FIG. 4 is an EL plot of a thermal cycling test of a comparative example pure braze tape;
FIG. 5 is an EL diagram of a constant temperature and humidity test of a composite solder strip of the present invention;
FIG. 6 is an EL plot of a constant temperature and humidity test of a comparative example pure braze tape.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
The invention realizes metallurgical bonding of copper and aluminum through cladding welding of copper strips and aluminum rods and multi-pass drawing, and achieves the composite welding strip with the same performance as oxygen-free copper after on-line annealing tinning.
Referring to fig. 1, a process flow diagram of the preparation of the copper-clad aluminum composite welding strip is provided. The preparation method of the copper-clad aluminum composite welding strip comprises the following steps:
step 1, respectively carrying out surface impurity removal on a copper strip and an aluminum rod, coating a substrate rod by the copper strip, and carrying out welding and polishing on a gap of the copper strip to obtain a composite copper rod;
specifically, as shown in fig. 2, the aluminum rod is discharged through the passive pay-off rack, the copper belt is paid off through the driving motor, and the oxygen-free copper belt is adopted as the copper belt. The aluminum rod is coated with the copper strip, the aluminum surface oxidation layer is removed through a ring cutter arranged in the vertical wiring direction, and the copper strip is cleaned by ultrasonic waves to clean residual dirt on the surface and dried. The copper strip is gradually wound into a barrel shape by a plurality of U-shaped wheels in the advancing process, and is wrapped on the periphery of the aluminum rod. The circumference of the aluminum rod after the circular cutting treatment is smaller than the width of the copper strip, and the wrapping gap is smaller than 0.08mm. Welding the formed longitudinal gaps in the nitrogen protection atmosphere, and radiating heat in time during welding to prevent the phenomenon of overburning from damaging the crystal structure of the aluminum rod and causing adverse effects on subsequent drawing. And (3) polishing the surface of the welded composite copper rod, then entering a wire winding frame, and stretching after transferring to a drawing process. The diameter of the composite copper rod is smaller than 15mm, and the volume ratio of copper in the composite copper rod is 10% -60%.
The aluminum rod can be replaced by magnesium aluminum alloy, and the copper strip can be coated with conductive materials, such as graphene, carbon fiber powder and the like, to increase conductivity before winding and coating.
Step 2, carrying out multi-pass drawing on the composite copper rod, and obtaining a composite copper wire after flaw detection;
in the drawing process, the reduction ratio of each pass drawing is 4% -5%. Drawing is divided into four stages, and the die proportion is as follows:
first stage: 14.2-13.75-13.30-12.85-12.4-11.95-11.50-11.05-10.6-10.2-9.8;
second stage: 9.5-9.0-8.6-8.3-8.0-7.7-7.4-7.1-6.8-6.5-6.2;
third stage: 5.9-5.6-5.3-5.0-4.7-4.4-4.2-4.0-3.8-3.6-3.4;
fourth stage: 3.2-3.0;
the unit of the ratio value of the die is mm.
The composite copper wire with good consistency and high yield is obtained through the drawing of the die proportion. The wire diameter of the composite copper wire is 3mm. And carrying out online flaw detection after fourth-stage drawing, and removing defective composite copper wires to obtain qualified composite copper wires.
And 3, drawing the composite copper wire to a specified specification, and heating, annealing and tinning the drawn composite copper wire to obtain the composite welding strip.
The wire diameter of the composite copper wire is 3mm, the composite copper wire is drawn for the second time to reach the wire diameter of 0.9mm according to the required specification, and the drawn composite copper wire is drawn for the third time to reach the wire diameter of 0.2mm.
And carrying out on-line annealing on the pulled composite copper wire through a short-circuit annealing machine. And the annealing temperature is 280-320 ℃, after the residual internal stress is eliminated, the surface of the copper-clad aluminum composite welding strip is coated with tin alloy in a hot dip plating mode, and the copper-clad aluminum composite welding strip is obtained. Wherein the thickness of the tin layer is 0.025mm-0.035mm.
Example 1
The copper strips are 37.7mm by 1.16mm, and the aluminum rod diameter is 10mm. The diameter of the aluminum rod after circular cutting is 9.6mm, and the clearance of the copper strip after cladding welding is 0.08mm. The volume ratio of copper in the composite copper rod is about 40%. And (3) carrying out multi-pass drawing on the composite copper rod until the wire diameter is 0.42mm, carrying out hot dip tinning, wherein the tinning temperature is 300 ℃, the thickness of a tin layer is 0.03mm, and testing the resistivity of the prepared composite welding strip, wherein the wire diameter of the prepared composite welding strip is 0.45 mm. And manufacturing a composite welding strip with the width of 0.6mm for experiments.
Comparative example 1
A pure braze tape was prepared from a copper substrate having the same resistivity as the composite braze tape of example 1, the wire diameter of the pure braze tape being 0.39mm. An experiment was performed by making a pure braze tape with a width of 0.6 mm.
The composite welding strip realizes forced deformation through a die during pass drawing, so that the copper-aluminum material generates plastic deformation at an interface, and the copper-aluminum material is meshed with each other and is subjected to canine tooth interlacing to realize the combination of bimetal. The existence of the bonding layer ensures the common deformation of the composite material, the strength of the bonding layer is improved along with the continuous process of the pass drawing, the tensile ductility of the material is continuously improved, and the composite welding strip has excellent mechanical properties. The performance parameters of the composite and pure braze strips are shown in table 1.
TABLE 1 Performance parameters of composite and pure copper solder strips
And taking the same battery piece, respectively adopting a composite welding strip and a pure copper welding strip to manufacture photovoltaic modules, and carrying out thermal cycle test and constant temperature and constant humidity test on the two photovoltaic modules.
Fig. 3 is an EL diagram of a thermal cycling test of a photovoltaic module using a composite solder tape, and fig. 4 is an EL diagram of a thermal cycling test of a photovoltaic module using a pure solder tape. As can be seen from fig. 3 and 4, the photovoltaic module using the composite solder strip has no significant difference from the photovoltaic module using the pure solder strip, and the composite solder strip can replace the pure solder strip.
Fig. 5 is an EL diagram of a constant temperature and humidity test of a photovoltaic module using a composite solder tape, and fig. 6 is an EL diagram of a constant temperature and humidity test of a photovoltaic module using a pure solder tape. As can be seen from fig. 5 and 6, the photovoltaic module using the composite solder strip has no significant difference from the photovoltaic module using the pure solder strip, and the composite solder strip can replace the pure solder strip.
Cost analysis was performed on the composite and pure copper solder strips, see in particular table 2.
TABLE 2 cost analysis of composite and pure copper solder strips
The length of the composite welding strip is 1.5-2.5 times of that of a pure copper wire under the condition that the wire diameter and the weight are equal, and the cost per kilogram can be reduced by 15-20%. The composite cost of mass production is estimated to be 2000-3000/T, and the cost of the composite welding strip is lower than that of a pure copper welding strip although the process is added.
While the invention has been described in detail in this specification with reference to the general description and the specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (10)
1. The preparation method of the copper-clad aluminum composite welding strip is characterized by comprising the following steps of:
step 1, respectively carrying out surface impurity removal on a copper strip and an aluminum rod, coating a substrate rod by the copper strip, and carrying out welding and polishing on a gap of the copper strip to obtain a composite copper rod;
step 2, carrying out multi-pass drawing on the composite copper rod, and obtaining a composite copper wire after flaw detection;
and 3, drawing the composite copper wire to a specified specification, and heating, annealing and tinning the drawn composite copper wire to obtain the composite welding strip.
2. The method for manufacturing the copper-clad aluminum composite welding strip according to claim 1, wherein the diameter of the composite copper rod in the step 1 is smaller than 15mm, and the volume ratio of copper in the composite copper rod is 10% -60%.
3. The method for producing a copper-clad aluminum composite welding strip according to claim 1, wherein the welding in step 1 is nitrogen shielded welding.
4. The method for manufacturing a copper-clad aluminum composite welding strip according to claim 1, wherein in the step 2, the reduction rate of drawing in each pass is 4% -5%, and the wire diameter of the composite copper wire is 3mm.
5. The method for preparing a copper-clad aluminum composite welding strip according to claim 4, wherein in the step 2, the multi-pass drawing comprises four-stage drawing, and the die proportions of each stage of drawing are respectively as follows:
first stage: 14.2-13.75-13.30-12.85-12.4-11.95-11.50-11.05-10.6-10.2-9.8;
second stage: 9.5-9.0-8.6-8.3-8.0-7.7-7.4-7.1-6.8-6.5-6.2;
third stage: 5.9-5.6-5.3-5.0-4.7-4.4-4.2-4.0-3.8-3.6-3.4;
fourth stage: 3.2-3.0;
the unit of the ratio value of the die is mm.
6. The method for producing a copper-clad aluminum composite solder strip according to claim 1, wherein in step 3, a short-circuit annealing machine is used for the annealing.
7. The method of manufacturing a copper clad aluminum composite solder strip according to claim 6, wherein in step 3, the annealing temperature is 280-320 ℃.
8. The method for producing a copper-clad aluminum composite solder strip according to claim 1, wherein in step 3, the tin layer thickness of tin plating is 0.025mm to 0.035mm.
9. The method for preparing the copper-clad aluminum composite welding strip according to claim 1, wherein one or more of graphene or carbon fiber powder is coated on the surface of the copper strip.
10. The composite solder strip prepared by the method for preparing a copper-clad aluminum composite solder strip according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211618211.2A CN116197610A (en) | 2022-12-15 | 2022-12-15 | Copper-clad aluminum composite welding strip and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211618211.2A CN116197610A (en) | 2022-12-15 | 2022-12-15 | Copper-clad aluminum composite welding strip and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116197610A true CN116197610A (en) | 2023-06-02 |
Family
ID=86511973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211618211.2A Pending CN116197610A (en) | 2022-12-15 | 2022-12-15 | Copper-clad aluminum composite welding strip and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116197610A (en) |
-
2022
- 2022-12-15 CN CN202211618211.2A patent/CN116197610A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6039628B2 (en) | Solar cell lead wire and solar cell manufacturing method | |
| EP4120369A1 (en) | Ribbon and solar cell assembly | |
| CN1747183A (en) | Flat conductor for solar battery and its manufacture and connection wire for solar battery | |
| US20100018748A1 (en) | Solar cell lead wire and method of manufacturing the same | |
| JP5831034B2 (en) | Manufacturing method of molten solder plating stranded wire | |
| JP6065646B2 (en) | Tape-like conductive material, solar cell interconnector and solar cell module | |
| CN102527768A (en) | Manufacturing method of copper-clad aluminum pipe | |
| CN100550432C (en) | The manufacture method of electrode wire for solar battery | |
| JP5446188B2 (en) | Interconnector for semiconductor wire mounting and interconnector for solar cell | |
| CN116197610A (en) | Copper-clad aluminum composite welding strip and preparation method thereof | |
| JP2011124512A (en) | Wiring parts for solar cell and solar cell module using the same | |
| CN108878052B (en) | Preparation method of superconducting wire/strip | |
| JP5609564B2 (en) | Manufacturing method of molten solder plating wire | |
| JP5040668B2 (en) | Superconducting tape manufacturing method and superconducting tape manufacturing apparatus | |
| CN113352019A (en) | Manufacturing method of copper-aluminum composite welding strip, copper-aluminum composite welding strip and solar module | |
| CN109935651B (en) | Photovoltaic solder strip and manufacturing method thereof | |
| JPS5910522B2 (en) | copper coated aluminum wire | |
| CN116798695A (en) | Preparation method of bismuth-series high-temperature superconducting wire | |
| JPS60118343A (en) | Manufacture of composite wire | |
| JP2011210868A (en) | Composite flat wire for connecting solar cell and method for manufacturing the same | |
| CN113937177A (en) | Manufacturing method of aluminum base material photovoltaic welding strip | |
| JP3948291B2 (en) | Nb3Al compound superconducting wire and method for producing the same | |
| CN115555422A (en) | Preparation method of single crystal copper bonding wire | |
| JP2004214020A (en) | Method of manufacturing nb3sn wire rod | |
| CN115255562A (en) | Preparation method of titanium alloy wear-resistant coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |