WO2023015885A1 - Method for manufacturing photovoltaic triangular solder strip - Google Patents

Method for manufacturing photovoltaic triangular solder strip Download PDF

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Publication number
WO2023015885A1
WO2023015885A1 PCT/CN2022/081382 CN2022081382W WO2023015885A1 WO 2023015885 A1 WO2023015885 A1 WO 2023015885A1 CN 2022081382 W CN2022081382 W CN 2022081382W WO 2023015885 A1 WO2023015885 A1 WO 2023015885A1
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WIPO (PCT)
Prior art keywords
roller
wire
triangular
metal wire
section
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PCT/CN2022/081382
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French (fr)
Chinese (zh)
Inventor
赵天鹏
王伟亮
陈章洋
杨亚骏
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常州时创能源股份有限公司
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Publication of WO2023015885A1 publication Critical patent/WO2023015885A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/10—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a single two-high or universal rolling mill stand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • 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

Definitions

  • the invention relates to the field of photovoltaics, in particular to a preparation method of a triangular welding ribbon for photovoltaics.
  • solder ribbons tinned metal wires
  • the ribbon will inevitably cover a considerable part of the light-receiving area of the cell.
  • the position of the ribbon and the area covered by it vary according to the graphic design of the battery and the design of the component process. As a result, the battery is blocked by the ribbon. A part of the photogenerated current is lost.
  • the value of the photogenerated current of the module can be effectively increased, thereby increasing the actual power generation of the module.
  • the actual technical application trend is to use thinner ribbons and special structures, such as triangular cross-section ribbons (hereinafter referred to as triangular ribbons), so that the shielded part of the light can be reflected back to the light-receiving area of the battery, etc.
  • the triangular welding strip As an example: the general triangular welding strip passes through the drawing die with triangular openings to shape the cross-section of the round copper wire and anneal and tin-plate it.
  • the wire diameter (referring to the base width of the triangular section of the ribbon) processed by this method is generally more than 0.3mm, and the triangular section processed by the above method is not a perfect triangle, and each corner of the triangle is a circle.
  • Arc shape which leads to the area of the ribbon that should have a reflective effect, and there will be areas that cannot effectively return light to the battery.
  • the processing width of the triangular arc is still greater than 0.03mm, that is to say, when converted to a triangular welding ribbon with a wire diameter of 0.3mm, nearly 20% of the welding ribbon shielding area cannot effectively reflect.
  • the wire diameter required by the welding ribbon becomes thinner and the arc processing width of 0.03 cannot be reduced, the effective reflection area ratio of the welding ribbon prepared by the above processing method will be lower than 80%, and the thinner the welding ribbon , the less effective reflective area.
  • the existing welding strip production process is tinning after shaping, as the wire diameter of the welding strip becomes thinner, the proportion of the thickness of the tin plating layer in the cross-section will also increase, while the tinning process , the surface tension of the liquid will make the surface of the wire more rounded by the liquid metal tin, which will further reduce the effective reflection area of the ribbon.
  • the object of the present invention is to provide a preparation method of triangular soldering ribbon for photovoltaics, including wire shaping and tinning of the wire;
  • the wire shaping includes: using a pair of rollers to roll the circular cross-section metal wire, Shape the wire section into a triangle;
  • the pair of rollers comprises: a first roller serving as a base shaping support for the triangular section of the wire, and a second roller for guiding and plastically working the wire;
  • the first roller and the second roller are straight rollers arranged in parallel; the surface (side peripheral surface) of the first roller is smooth; the surface (side peripheral surface) of the second roller is provided with an annular groove, and the annular groove It is coaxial with the second roller, and the cross section of the annular groove is triangular.
  • said metal wire shaping comprises the steps of:
  • the rolled metal wire is warp wound.
  • the first roller is arranged above the second roller.
  • the first roller is supported by movable bearings; the second roller is supported by fixed bearings.
  • the position of the movable bearing is locked.
  • a motor is used to drive the first roller and/or the second roller to rotate.
  • the metal wire is tinned first, and then the wire is shaped.
  • the tinning of the metal wire includes the following steps: pickling the circular cross-section metal wire, cleaning with flux, removing the oxide layer on the surface of the metal wire, passing the metal wire through molten solder, and then applying Wire winding.
  • the outer diameter of the circular cross-section metal wire is not less than 0.05mm; the solder is made of normal-temperature tin-lead alloy or low-temperature tin-bismuth alloy.
  • the advantages and beneficial effects of the present invention are: to provide a method for preparing a triangular ribbon for photovoltaic use, which can improve the accuracy of the triangular section of the ribbon, increase the effective reflection area of the ribbon, and further increase the power generation of the module.
  • the triangular section of the triangular welding strip processed by the present invention has higher precision, the arc width of the triangle vertex is significantly lower than that of the wire drawing die scheme, and the effective reflection area of the welding strip is greatly increased, which can improve the power generation performance of the module.
  • the preparation method of the present invention is also applicable to the production of welding ribbons with thinner wire diameters, which can improve the forming degree of ultra-fine metal wires when processing triangular cross-sections, is beneficial to increase light utilization by using reflected light, and can promote the reduction of the width of welding ribbons In order to reduce the light shading on the front of the module, thereby improving the power generation performance of the module.
  • the preparation method of the present invention is suitable for the scheme of tinning first and then processing and forming.
  • the scheme of tinning first can ensure the flatness of the non-welding surface of the welding strip after machining and forming, which is beneficial to improve the overall reflection of the welding strip to light rate, which can improve the power generation performance of components.
  • Fig. 1 is a schematic diagram of a first roller and a second roller in an unbonded state
  • Fig. 2 is a schematic diagram of laminating the first roller and the second roller.
  • the invention provides a preparation method of triangular soldering ribbon for photovoltaics, which includes metal wire shaping and metal wire tinning;
  • the metal wire can be copper wire;
  • the metal wire can be shaped first, and then the metal wire can be tinned; Tinning the wire, and then shaping the wire;
  • the metal wire shaping includes: using a pair of rollers 1, 2 to roll the circular cross-section metal wire 5, and shape the cross-section of the metal wire 5 into a triangle;
  • the pair of rollers includes: a first roller 1 used as a bottom surface molding support for the triangular section of the wire 5, and a second roller 2 for guiding and plastically processing the wire 5;
  • the first roller 1 and the second roller 2 are straight rollers arranged in parallel; the first roller 1 is arranged above the second roller 2, the first roller 1 is supported by a movable bearing 3, and the second roller 2 is supported by a fixed bearing 4; the surface (side peripheral surface) of the first roller 1 is smooth; the surface (side peripheral surface) of the second roller 2 is provided with an annular groove 21, and the annular groove 21 is coaxial with the second roller 2 Heart, and the cross section of the annular groove 21 is triangular;
  • the wire shaping includes the following steps:
  • the first roller 1 and the second roller 2 are used together, and the motor rotates one of the rollers to drive the first roller 1 and the second roller 2 to process, shape and feed the metal wire 5;
  • the first roller 1 and the second roller 2 are respectively connected with bearings, and the bearing of the first roller 1 on the top is a movable bearing 3, and the downward force is applied to the first roller 1 through the movable bearing 3, the strength is large
  • the materials of the first roller 1 and the second roller 2 also need to ensure that the hardness and yield strength are much greater than the metal wire 5 to be processed.
  • the tinning of the metal wire includes the following steps: pickling the circular cross-section metal wire, cleaning with flux, removing the oxide layer on the surface of the metal wire, and then making the metal wire
  • the metal wire stained with solder is rewound;
  • the outer diameter of the circular cross-section metal wire is determined according to the design requirements, and the outer diameter can be as low as 0.05mm; the solder composition needs to use the corresponding battery technology Solder, solder can use normal temperature tin-lead alloy or low temperature tin-bismuth alloy.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)

Abstract

A method for manufacturing a photovoltaic triangular solder strip, comprising metal wire shaping and metal wire tinning. The metal wire shaping comprises calendering a metal wire (5) having a circular cross section by using a pair of rollers, so as to shape the cross section of the metal wire to be triangular. The pair of rollers comprises a first roller (1) serving as a bottom shaping support for the triangular cross section of the metal wire, and a second roller (2) for guiding and shaping the machined metal wire; the first roller and the second roller are straight rollers arranged in parallel, the surface of the first roller is smooth, annular grooves (21) are formed on the surface of the second roller, the annular grooves are coaxial with the second roller, and the cross section of the annular groove is triangular. The method for manufacturing a photovoltaic triangular solder strip can improve the precision of the triangular cross section of the solder strip, increase the effective reflection area of the solder strip, and further improve the power generation capacity of a module.

Description

光伏用三角焊带的制备方法Preparation method of triangular welding ribbon for photovoltaic 技术领域technical field
本发明涉及光伏领域，具体涉及一种光伏用三角焊带的制备方法。The invention relates to the field of photovoltaics, in particular to a preparation method of a triangular welding ribbon for photovoltaics.
背景技术Background technique
在目前光伏领域的组件制作环节中，主流的技术方案为使用镀锡金属丝（以下简称为焊带），通过焊接的方式串联电池正负极印制的银浆主栅，使得一块组件内的所有电池在组件内部按照设计形成稳定的串并联电性能结构。在这一过程中，焊带不可避免的会覆盖电池片收光面积的相当一部分，焊带位置以及其所遮挡的面积根据电池图形设计以及组件工艺设计而不同，结果是电池因焊带遮挡而损失一部分的光生电流。In the current module manufacturing process in the photovoltaic field, the mainstream technical solution is to use tinned metal wires (hereinafter referred to as solder ribbons) to connect the silver paste busbars printed on the positive and negative electrodes of the battery in series by welding, so that the All batteries form a stable series-parallel electrical performance structure within the module according to the design. In this process, the ribbon will inevitably cover a considerable part of the light-receiving area of the cell. The position of the ribbon and the area covered by it vary according to the graphic design of the battery and the design of the component process. As a result, the battery is blocked by the ribbon. A part of the photogenerated current is lost.
通过减少焊带以及主栅的遮挡面积、提升电池受光区域光的利用率等方式，可以有效的提升组件光生电流数值，从而提高组件的实际发电量。在这几种技术方向上，出现的实际技术应用趋势为，使用更细的焊带，以及使用特殊结构，例如三角形截面焊带（以下简称为三角焊带），使得遮挡部分的光线通过反射回到电池受光区域等。By reducing the shading area of the solder strips and the main grid, and improving the utilization rate of light in the light-receiving area of the battery, the value of the photogenerated current of the module can be effectively increased, thereby increasing the actual power generation of the module. In these technical directions, the actual technical application trend is to use thinner ribbons and special structures, such as triangular cross-section ribbons (hereinafter referred to as triangular ribbons), so that the shielded part of the light can be reflected back to the light-receiving area of the battery, etc.
但是在此出现一个矛盾点，即线径越细的焊带，实际进行反光结构的制作就越困难。以三角焊带为例：一般的三角焊带通过三角型开孔的拉丝模具，对圆形铜线进行截面塑形，并进行退火镀锡。此方式所加工的三角焊带，线径（指焊带三角形截面的底边宽度）一般在0.3mm以上，并且上述方式所加工出的三角形截面，并非完美的三角形，三角形的各角均为圆弧状，这就导致了原本应起到反射作用的焊带面积，会有区域无法有效的将光线返还至电池。较好的加工精度下，三角圆弧的加工宽度仍大于0.03mm，也就是说换算至线径0.3mm的三角焊带上，近乎20%的焊带遮挡区域无法有效的发挥反射作用。随着焊带需要的线径越来越细，0.03的圆弧加工宽度无法下降，则上述加工方式所制备的焊带，其有效反射区域比例将会低于80%，且越细的焊带，有效反射区域越少。But there is a contradiction here, that is, the thinner the wire diameter is, the more difficult it is to actually manufacture the reflective structure. Take the triangular welding strip as an example: the general triangular welding strip passes through the drawing die with triangular openings to shape the cross-section of the round copper wire and anneal and tin-plate it. The wire diameter (referring to the base width of the triangular section of the ribbon) processed by this method is generally more than 0.3mm, and the triangular section processed by the above method is not a perfect triangle, and each corner of the triangle is a circle. Arc shape, which leads to the area of the ribbon that should have a reflective effect, and there will be areas that cannot effectively return light to the battery. With better processing accuracy, the processing width of the triangular arc is still greater than 0.03mm, that is to say, when converted to a triangular welding ribbon with a wire diameter of 0.3mm, nearly 20% of the welding ribbon shielding area cannot effectively reflect. As the wire diameter required by the welding ribbon becomes thinner and the arc processing width of 0.03 cannot be reduced, the effective reflection area ratio of the welding ribbon prepared by the above processing method will be lower than 80%, and the thinner the welding ribbon , the less effective reflective area.
另外，由于现有焊带的制作工序为塑形后再镀锡，随着焊带的线径越来越细，镀锡层的厚度在截面中的占比也会上升，而镀锡过程中，液面张力会使得金属丝的表面被液态金属锡包裹的更加圆润，这会进一步降低焊带的有效反射面积。In addition, since the existing welding strip production process is tinning after shaping, as the wire diameter of the welding strip becomes thinner, the proportion of the thickness of the tin plating layer in the cross-section will also increase, while the tinning process , the surface tension of the liquid will make the surface of the wire more rounded by the liquid metal tin, which will further reduce the effective reflection area of the ribbon.
而且，在加工更细的焊带过程中，金属丝的力学性能逐渐降低，金属丝的抗拉能力以及断裂延伸率同步降低，使用拉丝模具的加工方式更易出现断线等情况。Moreover, in the process of processing thinner ribbons, the mechanical properties of the metal wires gradually decrease, the tensile strength and elongation at break of the metal wires decrease simultaneously, and the processing method using a wire drawing die is more prone to wire breakage.
技术解决方案technical solution
本发明的目的在于提供一种光伏用三角焊带的制备方法，包括金属丝塑形和金属丝镀锡；所述金属丝塑形包括：采用一对滚轴对圆形截面金属丝进行压延，将金属丝截面塑型为三角形；The object of the present invention is to provide a preparation method of triangular soldering ribbon for photovoltaics, including wire shaping and tinning of the wire; the wire shaping includes: using a pair of rollers to roll the circular cross-section metal wire, Shape the wire section into a triangle;
所述一对滚轴包括：用作金属丝三角形截面的底面塑型支撑物的第一滚轴，以及用于引导和塑性加工金属丝的第二滚轴；The pair of rollers comprises: a first roller serving as a base shaping support for the triangular section of the wire, and a second roller for guiding and plastically working the wire;
所述第一滚轴和第二滚轴为平行设置的直滚轴；第一滚轴表面（侧周面）平滑；第二滚轴表面（侧周面）开设有环形凹槽，环形凹槽与第二滚轴共轴心，且环形凹槽的横截面为三角形。The first roller and the second roller are straight rollers arranged in parallel; the surface (side peripheral surface) of the first roller is smooth; the surface (side peripheral surface) of the second roller is provided with an annular groove, and the annular groove It is coaxial with the second roller, and the cross section of the annular groove is triangular.
优选的，所述金属丝塑形包括如下步骤：Preferably, said metal wire shaping comprises the steps of:
1）使第一滚轴和第二滚轴处于未贴合状态，将圆形截面金属丝置于第一滚轴和第二滚轴之间，使金属丝在第二滚轴的环形凹槽中通行，且使金属丝绷直；1) Keep the first roller and the second roller in an unbonded state, place the circular cross-section metal wire between the first roller and the second roller, and make the wire in the annular groove of the second roller Pass through the middle, and make the wire stretch straight;
2）使第一滚轴与第二滚轴贴合，第一滚轴对金属丝施加朝向第二滚轴的力；驱动第一滚轴和/或第二滚轴转动，带动金属丝进给，金属丝经过第一滚轴和第二滚轴时被压延。2) Make the first roller and the second roller stick together, and the first roller exerts a force on the wire towards the second roller; drive the first roller and/or the second roller to rotate, and drive the wire to feed , the metal wire is calendered when it passes through the first roller and the second roller.
优选的，金属丝经过第一滚轴和第二滚轴后，对完成压延的金属丝经线收卷。Preferably, after the metal wire passes through the first roller and the second roller, the rolled metal wire is warp wound.
优选的，所述第一滚轴设于第二滚轴上方。Preferably, the first roller is arranged above the second roller.
优选的，所述第一滚轴由活动轴承支承；所述第二滚轴由固定轴承支承。Preferably, the first roller is supported by movable bearings; the second roller is supported by fixed bearings.
优选的，所述第一滚轴与第二滚轴贴合后，锁定活动轴承的位置。Preferably, after the first roller is attached to the second roller, the position of the movable bearing is locked.
优选的，采用电机驱动第一滚轴和/或第二滚轴转动。Preferably, a motor is used to drive the first roller and/or the second roller to rotate.
优选的，先进行金属丝镀锡，再进行金属丝塑形。Preferably, the metal wire is tinned first, and then the wire is shaped.
优选的，所述金属丝镀锡包括如下步骤：对圆形截面金属丝进行酸洗、助焊剂清洗，去除金属丝表面氧化层，再使金属丝通过熔融状态的焊锡，再将沾有焊锡的金属丝收卷。Preferably, the tinning of the metal wire includes the following steps: pickling the circular cross-section metal wire, cleaning with flux, removing the oxide layer on the surface of the metal wire, passing the metal wire through molten solder, and then applying Wire winding.
优选的，所述圆形截面金属丝的外径不小于0.05mm；所述焊锡采用常温锡铅合金或低温锡铋合金。Preferably, the outer diameter of the circular cross-section metal wire is not less than 0.05mm; the solder is made of normal-temperature tin-lead alloy or low-temperature tin-bismuth alloy.
有益效果Beneficial effect
本发明的优点和有益效果在于：提供一种光伏用三角焊带的制备方法，可提高焊带三角形截面的精度，提升焊带的有效反射区域，进而提高组件的发电量。The advantages and beneficial effects of the present invention are: to provide a method for preparing a triangular ribbon for photovoltaic use, which can improve the accuracy of the triangular section of the ribbon, increase the effective reflection area of the ribbon, and further increase the power generation of the module.
本发明具有如下特点：The present invention has following characteristics:
1）本发明加工出的三角焊带的三角形截面精度更高，三角形顶角的圆弧宽度相比于拉丝模具方案显著降低，焊带的有效反射面积大大增加，可提升组件发电性能。1) The triangular section of the triangular welding strip processed by the present invention has higher precision, the arc width of the triangle vertex is significantly lower than that of the wire drawing die scheme, and the effective reflection area of the welding strip is greatly increased, which can improve the power generation performance of the module.
2）本发明的制备方法对于线径更细的焊带制作同样适用，可以提高极细金属丝加工三角形截面时的成型程度，有利于利用反射光线增加光利用率，且能促进焊带宽度降低以减少组件正面的光遮挡，进而提升组件发电性能。2) The preparation method of the present invention is also applicable to the production of welding ribbons with thinner wire diameters, which can improve the forming degree of ultra-fine metal wires when processing triangular cross-sections, is beneficial to increase light utilization by using reflected light, and can promote the reduction of the width of welding ribbons In order to reduce the light shading on the front of the module, thereby improving the power generation performance of the module.
3）本发明的制备方法适用于先镀锡后加工成型的方案，采用先镀锡的方案可以保证焊带的非焊接面加工成型后表面的平整性，有利于提升焊带整体对光线的反射率，可提升组件发电性能。3) The preparation method of the present invention is suitable for the scheme of tinning first and then processing and forming. The scheme of tinning first can ensure the flatness of the non-welding surface of the welding strip after machining and forming, which is beneficial to improve the overall reflection of the welding strip to light rate, which can improve the power generation performance of components.
附图说明Description of drawings
图1是第一滚轴和第二滚轴处于未贴合状态的示意图；Fig. 1 is a schematic diagram of a first roller and a second roller in an unbonded state;
图2是第一滚轴与第二滚轴贴合的示意图。Fig. 2 is a schematic diagram of laminating the first roller and the second roller.
本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION
下面结合附图和实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
本发明提供一种光伏用三角焊带的制备方法，包括金属丝塑形和金属丝镀锡；金属丝可以采用铜丝；可以先进行金属丝塑形，再进行金属丝镀锡；还可以先进行金属丝镀锡，再进行金属丝塑形；The invention provides a preparation method of triangular soldering ribbon for photovoltaics, which includes metal wire shaping and metal wire tinning; the metal wire can be copper wire; the metal wire can be shaped first, and then the metal wire can be tinned; Tinning the wire, and then shaping the wire;
如图1和图2所示，所述金属丝塑形包括：采用一对滚轴1、2对圆形截面金属丝5进行压延，将金属丝5截面塑型为三角形；As shown in Figures 1 and 2, the metal wire shaping includes: using a pair of rollers 1, 2 to roll the circular cross-section metal wire 5, and shape the cross-section of the metal wire 5 into a triangle;
所述一对滚轴包括：用作金属丝5三角形截面的底面塑型支撑物的第一滚轴1，以及用于引导和塑性加工金属丝5的第二滚轴2；The pair of rollers includes: a first roller 1 used as a bottom surface molding support for the triangular section of the wire 5, and a second roller 2 for guiding and plastically processing the wire 5;
所述第一滚轴1和第二滚轴2为平行设置的直滚轴；第一滚轴1设于第二滚轴2上方，第一滚轴1由活动轴承3支承，第二滚轴2由固定轴承4支承；第一滚轴1表面（侧周面）平滑；第二滚轴2表面（侧周面）开设有环形凹槽21，环形凹槽21与第二滚轴2共轴心，且环形凹槽21的横截面为三角形；The first roller 1 and the second roller 2 are straight rollers arranged in parallel; the first roller 1 is arranged above the second roller 2, the first roller 1 is supported by a movable bearing 3, and the second roller 2 is supported by a fixed bearing 4; the surface (side peripheral surface) of the first roller 1 is smooth; the surface (side peripheral surface) of the second roller 2 is provided with an annular groove 21, and the annular groove 21 is coaxial with the second roller 2 Heart, and the cross section of the annular groove 21 is triangular;
具体的，所述金属丝塑形包括如下步骤：Specifically, the wire shaping includes the following steps:
1）如图1所示，使第一滚轴1和第二滚轴2处于未贴合状态，将圆形截面金属丝5置于第一滚轴1和第二滚轴2之间，使金属丝5在第二滚轴2的环形凹槽21中通行，且使金属丝5绷直；1) As shown in Figure 1, make the first roller 1 and the second roller 2 in an unbonded state, and place the circular cross-section metal wire 5 between the first roller 1 and the second roller 2, so that The metal wire 5 passes in the annular groove 21 of the second roller 2, and the metal wire 5 is stretched straight;
2）如图2所示，使第一滚轴1与第二滚轴2贴合，第一滚轴1对金属丝5施加朝向第二滚轴2的力，锁定活动轴承3的位置；采用电机驱动第一滚轴1和/或第二滚轴2转动，带动金属丝5进给，金属丝5经过第一滚轴1和第二滚轴2时被压延；2) As shown in Figure 2, make the first roller 1 and the second roller 2 fit together, and the first roller 1 exerts a force on the metal wire 5 toward the second roller 2 to lock the position of the movable bearing 3; The motor drives the first roller 1 and/or the second roller 2 to rotate, driving the metal wire 5 to feed, and the metal wire 5 is rolled when passing through the first roller 1 and the second roller 2;
3）金属丝5经过第一滚轴1和第二滚轴2后，对完成压延的金属丝5经线收卷。3) After the metal wire 5 passes through the first roller 1 and the second roller 2, the rolled metal wire 5 is warp wound.
本发明中的第一滚轴1和第二滚轴2配合使用，通过电机转动其中一个滚轴，带动第一滚轴1和第二滚轴2进行金属丝5的加工塑型以及进给；第一滚轴1和第二滚轴2分别连接轴承，其中在上的第一滚轴1的轴承为可活动轴承3，通过活动轴承3为第一滚轴1施加向下的力，力度大小视被加工金属丝5的力学性能而定，第一滚轴1、第二滚轴2的材质也需确保硬度和屈服强度远大于被加工的金属丝5。In the present invention, the first roller 1 and the second roller 2 are used together, and the motor rotates one of the rollers to drive the first roller 1 and the second roller 2 to process, shape and feed the metal wire 5; The first roller 1 and the second roller 2 are respectively connected with bearings, and the bearing of the first roller 1 on the top is a movable bearing 3, and the downward force is applied to the first roller 1 through the movable bearing 3, the strength is large Depending on the mechanical properties of the metal wire 5 to be processed, the materials of the first roller 1 and the second roller 2 also need to ensure that the hardness and yield strength are much greater than the metal wire 5 to be processed.
若先进行金属丝镀锡，再进行金属丝塑形，则其中金属丝镀锡包括如下步骤：对圆形截面金属丝进行酸洗、助焊剂清洗，去除金属丝表面氧化层，再使金属丝通过熔融状态的焊锡，再将沾有焊锡的金属丝收卷；所述圆形截面金属丝的外径根据设计需求而定，外径最低可至0.05mm；所述焊锡成分需使用对应电池技术的焊锡，焊锡可采用常温锡铅合金或低温锡铋合金等。If the tinning of the metal wire is carried out first, and then the metal wire is shaped, the tinning of the metal wire includes the following steps: pickling the circular cross-section metal wire, cleaning with flux, removing the oxide layer on the surface of the metal wire, and then making the metal wire Through the solder in the molten state, the metal wire stained with solder is rewound; the outer diameter of the circular cross-section metal wire is determined according to the design requirements, and the outer diameter can be as low as 0.05mm; the solder composition needs to use the corresponding battery technology Solder, solder can use normal temperature tin-lead alloy or low temperature tin-bismuth alloy.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

  1. 光伏用三角焊带的制备方法，包括金属丝塑形和金属丝镀锡；其特征在于，所述金属丝塑形包括：采用一对滚轴对圆形截面金属丝进行压延，将金属丝截面塑型为三角形；The preparation method of the triangular welding ribbon for photovoltaics includes metal wire shaping and metal wire tinning; it is characterized in that the metal wire shaping includes: using a pair of rollers to roll the circular cross-section metal wire, and the metal wire cross-section shape into a triangle;
    所述一对滚轴包括：用作金属丝三角形截面的底面塑型支撑物的第一滚轴，以及用于引导和塑性加工金属丝的第二滚轴；The pair of rollers comprises: a first roller serving as a base shaping support for the triangular section of the wire, and a second roller for guiding and plastically working the wire;
    所述第一滚轴和第二滚轴为平行设置的直滚轴；第一滚轴表面平滑；第二滚轴表面开设有环形凹槽，环形凹槽与第二滚轴共轴心，且环形凹槽的横截面为三角形。The first roller and the second roller are straight rollers arranged in parallel; the surface of the first roller is smooth; the surface of the second roller is provided with an annular groove, the annular groove is coaxial with the second roller, and The cross section of the annular groove is triangular.
  2. 根据权利要求1所述的光伏用三角焊带的制备方法，其特征在于，所述金属丝塑形包括如下步骤：The method for preparing a triangular ribbon for photovoltaic use according to claim 1, wherein said metal wire shaping comprises the following steps:
    1）使第一滚轴和第二滚轴处于未贴合状态，将圆形截面金属丝置于第一滚轴和第二滚轴之间，使金属丝在第二滚轴的环形凹槽中通行，且使金属丝绷直；1) Keep the first roller and the second roller in an unbonded state, place the circular cross-section metal wire between the first roller and the second roller, and make the wire in the annular groove of the second roller Pass through the middle, and make the wire stretch straight;
    2）使第一滚轴与第二滚轴贴合，第一滚轴对金属丝施加朝向第二滚轴的力；驱动第一滚轴和/或第二滚轴转动，带动金属丝进给，金属丝经过第一滚轴和第二滚轴时被压延。2) Make the first roller and the second roller stick together, and the first roller exerts a force on the wire towards the second roller; drive the first roller and/or the second roller to rotate, and drive the wire to feed , the metal wire is calendered when it passes through the first roller and the second roller.
  3. 根据权利要求2所述的光伏用三角焊带的制备方法，其特征在于，金属丝经过第一滚轴和第二滚轴后，对完成压延的金属丝经线收卷。The method for preparing a triangular ribbon for photovoltaic use according to claim 2, characterized in that, after the metal wire passes through the first roller and the second roller, the rolled metal wire is wound up.
  4. 根据权利要求1所述的光伏用三角焊带的制备方法，其特征在于，所述第一滚轴设于第二滚轴上方。The method for preparing a triangular ribbon for photovoltaic use according to claim 1, wherein the first roller is arranged above the second roller.
  5. 根据权利要求1所述的光伏用三角焊带的制备方法，其特征在于，所述第一滚轴由活动轴承支承；所述第二滚轴由固定轴承支承。The method for preparing a photovoltaic triangular ribbon according to claim 1, wherein the first roller is supported by a movable bearing; the second roller is supported by a fixed bearing.
  6. 根据权利要求5所述的光伏用三角焊带的制备方法，其特征在于，所述第一滚轴与第二滚轴贴合后，锁定活动轴承的位置。The method for preparing a triangular ribbon for photovoltaic use according to claim 5, characterized in that, after the first roller is attached to the second roller, the position of the movable bearing is locked.
  7. 根据权利要求1所述的光伏用三角焊带的制备方法，其特征在于，采用电机驱动第一滚轴和/或第二滚轴转动。The method for preparing a photovoltaic triangular ribbon according to claim 1, characterized in that a motor is used to drive the first roller and/or the second roller to rotate.
  8. 根据权利要求1所述的光伏用三角焊带的制备方法，其特征在于，先进行金属丝镀锡，再进行金属丝塑形。The method for preparing a triangular ribbon for photovoltaic use according to claim 1, characterized in that the tinning of the wire is carried out first, and then the wire is shaped.
  9. 根据权利要求8所述的光伏用三角焊带的制备方法，其特征在于，所述金属丝镀锡包括如下步骤：对圆形截面金属丝进行酸洗、助焊剂清洗，去除金属丝表面氧化层，再使金属丝通过熔融状态的焊锡，再将沾有焊锡的金属丝收卷。The method for preparing triangular soldering ribbons for photovoltaics according to claim 8, wherein the tinning of the metal wires comprises the steps of: pickling the circular cross-section metal wires, cleaning with flux, and removing the oxide layer on the surface of the metal wires , and then make the wire pass through the solder in the molten state, and then wind up the wire stained with solder.
  10. 根据权利要求9所述的光伏用三角焊带的制备方法，其特征在于，所述圆形截面金属丝的外径不小于0.05mm；所述焊锡采用常温锡铅合金或低温锡铋合金。The method for preparing triangular ribbon for photovoltaic use according to claim 9, characterized in that the outer diameter of the circular cross-section metal wire is not less than 0.05mm; the solder is made of normal temperature tin-lead alloy or low temperature tin-bismuth alloy.
PCT/CN2022/081382 2021-08-11 2022-03-17 Method for manufacturing photovoltaic triangular solder strip WO2023015885A1 (en)

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