CN108941970B - High-precision welding strip for welding junction box and preparation method thereof - Google Patents
High-precision welding strip for welding junction box and preparation method thereof Download PDFInfo
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- CN108941970B CN108941970B CN201810927456.0A CN201810927456A CN108941970B CN 108941970 B CN108941970 B CN 108941970B CN 201810927456 A CN201810927456 A CN 201810927456A CN 108941970 B CN108941970 B CN 108941970B
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- welding
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- junction box
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a welding strip for welding a high-precision junction box and a preparation method thereof. The welding strip is prepared by mixing the following raw materials in parts by weight: 5-20% of Si, 78-2% of Cu1, 32-8% of Ag2, 25-38% of Sn, 4-6% of Ge, 26-6% of Zn2, 1-4% of Mo, 10-25% of straw powder, 1-6% of nano carbon, 1-3% of graphene, 8-20% of polyethylene-sodium molybdate and the balance of additives. Weighing the components; mixing Si, Cu, Ag, Sn, Ge, Zn and Mo, putting into a reaction kettle, melting the mixture A, and keeping the temperature for later use; mixing nano carbon, straw powder, graphene and polyethylene-sodium molybdate, stirring, freeze drying, and ball milling to obtain a mixture B of 200 meshes and 300 meshes; the mixture B is added into the mixture A, stirred and then put into an extruder to extrude the welding strip.
Description
Technical Field
The invention belongs to the field of solar cells, and particularly relates to a high-precision welding strip for welding a junction box and a preparation method thereof.
Background
The welding strip is an important raw material in the welding process of the solar photovoltaic cell module, and the quality of the welding strip directly influences the collection efficiency of the current of the photovoltaic module. Generally, the thickness of the solder strip is determined according to the thickness of the battery piece and the short-circuit current, the width of the solder strip is consistent with the width of a main grid line of the battery, the thickness is thinner and thinner along with the improvement of the efficiency of the battery piece, and the yield requirement on the solder strip is lower. At present, a common ultra-soft welding strip has low tensile strength, is easy to break and is easy to waste when in use.
Application No. 200810145147.4 discloses a solder that realizes high-temperature-end solder bonding in temperature-hierarchical bonding in which a connection portion between a semiconductor device and a substrate is formed by a metal ball composed of Cu or the like and a compound composed of the metal ball and Sn, and the metal balls are bonded together by the compound. The solder strip is simple in composition, but high in cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a high-precision welding strip for welding a junction box and a preparation method thereof.
In order to solve the problems of the prior art, the invention adopts the technical scheme that:
a high-precision welding strip for welding a junction box is prepared by mixing the following raw materials in parts by weight: 5-20% of Si, 78-2% of Cu1, 32-8% of Ag2, 25-38% of Sn, 4-6% of Ge, 26-6% of Zn2, 1-4% of Mo, 10-25% of straw powder, 1-6% of nano carbon, 1-3% of graphene, 8-20% of polyethylene-sodium molybdate and the balance of additives.
The improved high-precision welding strip for welding the junction box is prepared by mixing the following raw materials in parts by mass: 18% of Si, 2% of Cu, 6% of Ag, 32% of Sn, 5% of Ge, 5% of Zn, 3% of Mo, 12% of straw powder, 5% of nano-carbon, 1% of graphene, 10% of polyethylene-sodium molybdate and the balance of additives.
The improvement is that the straw powder is wheat straw powder or rice straw powder.
As an improvement, the mesh number of the straw powder is 200-300 meshes.
The improvement is that the additive is any one of sodium alginate, diatom ooze or kaolin.
The preparation method of the welding strip for welding the high-precision junction box comprises the following steps:
step 1, weighing the components, and mixing the components in parts by weight to prepare the composite material: 5-20% of Si, 78-2% of Cu1, 32-8% of Ag2, 25-38% of Sn, 4-6% of Ge, 26-6% of Zn2, 1-4% of Mo, 10-25% of straw powder, 1-6% of nano carbon, 1-3% of graphene, 8-20% of polyethylene-sodium molybdate and the balance of additives;
step 2, mixing Si, Cu, Ag, Sn, Ge, Zn and Mo, putting the mixture into a reaction kettle, melting the mixture A, and keeping the temperature for later use;
step 3, mixing the nano carbon, the straw powder, the graphene and the polyethylene-sodium molybdate, stirring, freeze-drying, and ball-milling to obtain a mixture B of 200 meshes and 300 meshes;
and 4, adding the mixture B into the mixture A, stirring, and then putting into an extruder to extrude the welding strip.
As a modification, the extrusion temperature of the extruder in step 4 was 150-180 ℃.
Compared with the prior art, the straw powder is subjected to modification treatment, the obtained straw powder is loaded with the nano carbon and the graphene, the modified straw fiber is good in conductivity and can replace other metal components, the obtained welding strip is soft, high in yield and high in cooling speed, the battery piece is not easy to bow, the welding effect is firm, and insufficient solder or fragments are reduced. The preparation method is simple, has low requirements on equipment, and has good industrialization.
Detailed Description
The technical scheme of the invention is specifically described by combining the embodiment.
Example 1
A high-precision welding strip for welding a junction box is prepared by mixing the following raw materials in parts by weight: 5% of Si, 1% of Cu, 2% of Ag, 25% of Sn, 4% of Ge, 2% of Zn, 1% of Mo, 10% of 200-mesh rice straw powder, 1% of nano-carbon, 1% of graphene, 8% of polyethylene-sodium molybdate and the balance of sodium alginate.
The preparation method of the welding strip for welding the high-precision junction box comprises the following steps:
step 1, weighing each component;
step 2, mixing Si, Cu, Ag, Sn, Ge, Zn and Mo, putting the mixture into a reaction kettle, melting the mixture A, and keeping the temperature for later use;
step 3, mixing the nanocarbon, the straw powder, the graphene and the polyethylene-sodium molybdate, stirring, freeze-drying, and ball-milling to obtain a 200-mesh mixture B;
and 4, adding the mixture B into the mixture A, stirring, and then putting into an extruder at 150 ℃ to extrude the welding strip.
Example 2
A high-precision welding strip for welding a junction box is prepared by mixing the following raw materials in parts by weight:
18% of Si, 2% of Cu, 6% of Ag, 32% of Sn, 5% of Ge, 5% of Zn, 3% of Mo, 12% of 300-mesh wheat straw powder, 5% of nano-carbon, 1% of graphene, 10% of polyethylene-sodium molybdate and the balance of diatom ooze.
The preparation method of the welding strip for welding the high-precision junction box comprises the following steps:
step 1, weighing each component;
step 2, mixing Si, Cu, Ag, Sn, Ge, Zn and Mo, putting the mixture into a reaction kettle, melting the mixture A, and keeping the temperature for later use;
step 3, mixing the nanocarbon, the straw powder, the graphene and the polyethylene-sodium molybdate, stirring, freeze-drying, and ball-milling to obtain a 300-mesh mixture B;
and 4, adding the mixture B into the mixture A, stirring, and then putting into an extruder at 160 ℃ to extrude the welding strip.
Example 3
A high-precision welding strip for welding a junction box is prepared by mixing the following raw materials in parts by weight: 5-20% of Si, 78-2% of Cu1, 32-8% of Ag2, 25-38% of Sn, 4-6% of Ge, 26-6% of Zn2, 1-4% of Mo, 10-25% of 300-mesh wheat straw powder, 1-6% of nano carbon, 1-3% of graphene, 8-20% of polyethylene-sodium molybdate and the balance of kaolin.
The preparation method of the welding strip for welding the high-precision junction box comprises the following steps:
step 1, weighing each component;
step 2, mixing Si, Cu, Ag, Sn, Ge, Zn and Mo, putting the mixture into a reaction kettle, melting the mixture A, and keeping the temperature for later use;
step 3, mixing the nano carbon, the straw powder, the graphene and the polyethylene-sodium molybdate, stirring, freeze-drying, and ball-milling to obtain a mixture B of 200 meshes and 300 meshes;
and 4, adding the mixture B into the mixture A, stirring, and putting into an extruder at 180 ℃ to extrude the welding strip.
Comparative example 1
Solder strip prepared as in example 1 of application No. 201210495205.2.
The solder strips of examples 1-3 were tested and the data obtained are shown below. All detection methods are carried out according to national standards.
The results show that the nano carbon and graphene are loaded on the straw powder through modification treatment of the straw powder, the modified straw fiber is good in conductivity and can replace other metal components, the obtained welding strip is soft, high in yield and high in cooling speed, the battery piece is not easy to bow, the welding effect is firm, and insufficient solder or fragments are reduced. The preparation method is simple, has low requirements on equipment, and has good industrialization.
Claims (4)
1. The high-precision welding strip for welding the junction box is characterized by being prepared by mixing the following raw materials in percentage by mass: 5-20% of Si, 78-2% of Cu1, 32-8% of Ag2, 25-38% of Sn, 4-6% of Ge, 26-6% of Zn2, 1-4% of Mo, 10-25% of straw powder, 1-6% of nano carbon, 1-3% of graphene, 8-20% of polyethylene-sodium molybdate and the balance of additives; the additive is any one of sodium alginate, diatom ooze or kaolin.
2. The welding strip for welding the high-precision junction box as claimed in claim 1, which is prepared by mixing the following raw materials in percentage by mass: 18% of Si, 2% of Cu, 6% of Ag, 32% of Sn, 5% of Ge, 5% of Zn, 3% of Mo, 12% of straw powder, 5% of nano-carbon, 1% of graphene, 10% of polyethylene-sodium molybdate and the balance of additives.
3. The solder strip for welding a high-precision junction box according to claim 1, wherein the straw powder is wheat straw powder or rice straw powder.
4. The welding strip for welding the high-precision junction box as claimed in claim 1, wherein the straw powder has a mesh size of 200-300 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810927456.0A CN108941970B (en) | 2018-08-15 | 2018-08-15 | High-precision welding strip for welding junction box and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810927456.0A CN108941970B (en) | 2018-08-15 | 2018-08-15 | High-precision welding strip for welding junction box and preparation method thereof |
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| CN108941970A CN108941970A (en) | 2018-12-07 |
| CN108941970B true CN108941970B (en) | 2021-03-12 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102210291B1 (en) * | 2013-01-16 | 2021-02-01 | 호바트 브라더즈 엘엘씨 | A tubular welding wire |
| EP3157704A1 (en) * | 2014-06-19 | 2017-04-26 | Alpha Metals, Inc. | Engineered residue solder paste technology |
| US10682732B2 (en) * | 2015-04-01 | 2020-06-16 | Alpha Assembly Solutions Inc. | Engineered polymer-based electronic materials |
| CN107275431A (en) * | 2017-05-08 | 2017-10-20 | 江苏东昇光伏科技有限公司 | A kind of solar-energy photo-voltaic cell welding and preparation method thereof |
| CN107598413B (en) * | 2017-09-01 | 2020-04-03 | 北京工业大学 | Double-coating copper-plating-free solid welding wire with epoxy-based conductive coating as intermediate layer |
| CN107671453A (en) * | 2017-11-18 | 2018-02-09 | 明光市海港凹坭矿业有限公司 | A kind of preparation method of special Attapulgite mineral powder for welding rod auxiliary material |
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