82results about How to "Improve welding tension" patented technology

The invention discloses an automobile air conditioner compressor hollow piston, which comprises aluminum alloy prepared from the following ingredients in percentage by weight: 11 to 13 percent of Si, 3.5 to 4.5 percent of Cu, 0.2 to 0.5 percent of Mg, 0.8 to 1.5 percent of Ni, 0.1 to 0.3 percent of Cr, 0.1 to 0.3 percent of C, 0 to 0.1 percent of Mn, 0 to 0.5 percent of Zn, 0 to 0.15 percent of Ti, 0.1 to 0.3 percent of RE and the balance Al. The invention also provides a production method of the automobile air conditioner compressor hollow piston. Through the selection and the control on elements in the aluminum alloy for the hollow piston, the intensity and the hardness of the piston are improved; through further improvement on the laser welding process, the welding seam fine porosity rate is reduced, the welding tension is enhanced, and the welding quality is improved, so the use performance of the hollow piston is improved, and the service life of the hollow piston is prolonged.

The invention discloses a glass material with low melting point and a silver paste prepared from the same. The glass material is prepared from the following components: 30-60wt% of SnO, 8-25wt% of PbO or a mixture of PbO and any one of Bi2O3 and TeO2, 10-20wt% of B2O3 or a mixture of B2O3 and SiO2, 5-10wt% of P2O5, 1-10wt% of ZnO, 0-5wt% of one or more alkaline earth metal oxides, 0-5wt% of one or more alkali metal oxide and 0-5wt% of AuCl2. The glass material can be used for preparing a silver paste for silicon solar cell N-type emitting electrodes and improving contact resistance and electrode pull force between a silver electrode and a silicon emitting electrode.

The invention discloses an interdigital electrode for a solar battery. The interdigital electrode is disposed on the shady face of a solar cell and composed of a positive pole and a negative pole; each of the positive pole and the negative pole is composed of main grid lines and auxiliary grid lines; the main grid lines are perpendicular to and connected with the auxiliary grid lines; each main grid line is made by connecting more than two thick grid segments though thin grid lines; the auxiliary grid lines of the positive pole and those of the negative pole are mutually parallel and are mutually spaced. The interdigital electrode with the structure has the advantages that current of the solar battery can be guided out in a balanced way, series and parallel connection of the solar batteries is favored, and welding tension of the interdigital electrode on back-contact solar batteries is higher.

The present invention relates to the technical field of solar cells and especially relates to a positive silver paste of crystalline silicon solar cell laminated printing and a preparation method thereof. A first positive silver paste is characterized for first positive silver printing and is formed by, by weight, 75% to 90% of silver powder, 1% to 8% of glass powder, 5 % to 15% of organic carriers 1, 0% to 1.5% of auxiliaries, 0.1% to 3% of adhesion promoters, and balance of solvent. A second positive silver paste is characterized for second positive silver printing and is formed by, by weight, 75% to 90% of silver powder, 1% to 8% of glass powder, 5 % to 15% of organic carriers 2, 0% to 1.5% of auxiliaries, 0.1% to 3% of pulling agent, and balance of solvent. The positive silver paste of crystalline silicon solar cell laminated printing comprises special first positive silver paste and second positive silver paste, the contact resistance of a cell can be reduced, the short circuit current and open circuit voltage are raised, a fill factor is raised, and thus the light conversion efficiency of the cell is improved.

The invention discloses a photovoltaic module and a manufacturing method thereof, and the method comprises the following steps: placing a plurality of interconnection structural members on the surface of one side of a battery piece, enabling one end, corresponding to a first bonding pad, of each interconnection structural member to extend to one side, which exceeds the edge, adjacent to the battery piece, of the first bonding pad, a plurality of bonding pads are arranged between each interconnection structural member and the battery piece, and the bonding pad closest to the edge of one side of the battery piece in the plurality of bonding pads is a first bonding pad; judging whether the actual length L1 of each interconnection structural member is equal to the theoretical length L of the interconnection structural member or not; if L1 is equal to L, keeping the position of the corresponding interconnection structural member unchanged; if L1 is less than L, moving the corresponding interconnection structural member towards the direction of the edge of the battery piece; and if L1 is greater than L, moving the corresponding interconnection structural member towards the direction far away from the edge of the battery piece. According to the manufacturing method of the photovoltaic module provided by the invention, the deviation correction of the interconnected structural member can be realized, and the reliability of the photovoltaic module is improved.

The invention belongs to the technical field of conductive paste, and particularly relates to a frit for crystalline silicon solar cells, a preparation method of the frit, and a silver paste. The fritis prepared from the following components in percentage by mass: 5 to 20wt% of Tl2O3, 5 to 10wt% of PbO, 20 to 30 wt% of TeO2, 5 to 10 wt% of Bi2O3, 5 to 15 wt% of WO3, 0 to 5 wt% of SiO2, 10 to 15 wt% of ZnO and 5 to 15 wt% of alkali metal oxide R2O. The frit provided by the invention is used for preparing front silver paste suitable for crystalline silicon solar cells, so that the silver pasteis provided with excellent electrical properties and welding tension.

The invention discloses a glass material for a high-sheet-resistance shallow crystallized silicon solar cell. The glass material is prepared from the following raw materials: 10 weight percent to 30 weight percent of SeO2, 5 weight percent to 10 weight percent of PbO, 10 weight percent to 20 weight percent of WO3, 10 weight percent to 20 weight percent of SiO2, 10 weight percent to 20 weight percent of ZnO, 0 weight percent to 10 weight percent of alkaline earth metal oxide RO and 0 weight percent to 10 weight percent to alkaline earth metal oxide R2O. The invention further discloses a preparation method of the glass material, slurry prepared from the glass material and a preparation method of the slurry. The glass material disclosed by the invention is a Se-Pb-Si-W-Zn oxide system; the glass system has low glass transition temperature and softening temperature and has a relatively good wetting property on silver and silicon; the glass system is applied to a high-sheet-resistance shallow crystallized silicon wafer so that contact resistance is easy to improve; the glass material also has a very good wetting capability on silver powder and can be firmly combined with the silicon wafer, so that the welding pulling force of a silver electrode is improved.

The invention provides photovoltaic welding strip alloy solder and a preparation method thereof. The raw material of the photovoltaic welding strip alloy solder comprises tin-lead alloy, bismuth, indium, phosphorus, cerium, neodymium and germanium. According to the photovoltaic welding strip alloy solder, the bismuth, indium, neodymium, cerium, germanium, gallium, phosphorus and copper are added into the tin-lead alloy, the melting point of the photovoltaic welding strip alloy solder is effectively reduced, the oxidation resistance, welding tension, expansion rate and fluidity of the photovoltaic welding strip alloy solder are improved, and the generation of slag soil is reduced. According to the photovoltaic welding strip alloy solder, the yield of tin products is improved, the productivity of hot tinning products is improved, the wettability of tin plating solution is improved, and other physical and mechanical properties of tin plating products are not affected; and the preparationmethod is simple, the cost is low, the daily maintenance and curing of an existing equipment are not affected, the environmental protection requirements are met, and the working environment of the production site is not affected.

The invention relates to the technical field of an electronic material, and particularly relates to crystalline silicon solar cell positive silver paste and a preparation method therefor. The crystalline silicon solar cell positive silver paste comprises the following components based on mass percentages: 1-90% of silver powder, 5-15% of organic carrier, 1-8% of glass powder, 0-3% of auxiliaries, and 0.02-0.1% of sintering inhibitor, wherein the sum of the contents of the components is equal to 100%; the sintering inhibitor is one or several kinds of metals or metal oxides or metal resinate selected from Co, Ru, Rh, Pd, W, Re, Os, Ir or PT; and the paste is also added with metals or metal oxides or metal resinate, so that certain problems caused by paste shrinkage in the sintering process of the paste can be solved, and shortcomings generated in the sintering process can be avoided.

The invention discloses a preparation method and application of a back electrode of a solar cell, which comprises two parts, a back electrode barrier layer and a back silver paste. 20 to 80 part of metal nitride powder, nitrogen-silicon compound powder, oxide powder or low-melting-point metal powder, 0.5 to 5 parts of lead-free glass powder, 10 to 40 parts of organic carrier and 0.1 to 1 part of organic assistant. 10-80 part of silver powder, 0. 5-5 parts of lead-free glass powder, 15-50 parts of organic bind and 0. 01-1 part of organic assistant. The present invention ensures that it has considerable welding pulling force and aging pulling force, avoids serious electric leakage problem caused by metal defects caused by direct contact between silver and silicon wafer or aluminum paste, improves photoelectric conversion efficiency of crystalline silicon battery, adjusts back electrode width and printed pattern, and reduces back electrode paste cost.