WO2021098702A1 - Photovoltaic welding strip - Google Patents

Photovoltaic welding strip Download PDF

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Publication number
WO2021098702A1
WO2021098702A1 PCT/CN2020/129651 CN2020129651W WO2021098702A1 WO 2021098702 A1 WO2021098702 A1 WO 2021098702A1 CN 2020129651 W CN2020129651 W CN 2020129651W WO 2021098702 A1 WO2021098702 A1 WO 2021098702A1
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WO
WIPO (PCT)
Prior art keywords
segment body
section
photovoltaic
cross
segment
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PCT/CN2020/129651
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French (fr)
Chinese (zh)
Inventor
肖锋
Original Assignee
苏州宇邦新型材料股份有限公司
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Publication date
Priority claimed from CN201911145123.3A external-priority patent/CN110890442A/en
Priority claimed from CN201922017404.2U external-priority patent/CN210805796U/en
Application filed by 苏州宇邦新型材料股份有限公司 filed Critical 苏州宇邦新型材料股份有限公司
Priority to KR2020217000059U priority Critical patent/KR200497949Y1/en
Priority to JP2021600139U priority patent/JP3236394U/en
Publication of WO2021098702A1 publication Critical patent/WO2021098702A1/en

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    • 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
    • H01L31/0508—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 the interconnection means having a particular shape
    • 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
    • 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
    • H01L31/0516—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 specially adapted for interconnection of back-contact solar cells
    • 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
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the invention relates to the field of photovoltaic technology, in particular to a photovoltaic soldering tape.
  • the solder ribbons connected to the front and back of photovoltaic cells are of the same shape and size.
  • the existing solder ribbons connected to the back of the battery are too thick, so that the gap between the sheets cannot be further reduced. Otherwise, it is easy to cause cell fragments or cracks.
  • the overall solder ribbon is made thinner. In order not to affect the conductivity of the solder ribbon, the solder ribbon will inevitably become wider, which will cause more obstructions on the front of the battery, and the power of the module will decrease; a larger inter-chip spacing reduces the conversion efficiency and light of the photovoltaic module. Utilization rate, while also wasting related auxiliary materials for photovoltaic modules.
  • the purpose of the present invention is to provide a photovoltaic ribbon.
  • a photovoltaic ribbon including at least one cycle of ribbon segments, and the single cycle of the ribbon segments includes successively connected:
  • the first segment body is used for joining on the front grid line of the photovoltaic cell, and the first segment body has a curved surface for reflecting the light incident on the surface of the photovoltaic ribbon;
  • the second section body is correspondingly arranged between two adjacent photovoltaic cells.
  • the second section body is flat, and the maximum width of the cross section of the second section body is greater than that of the first section body. The maximum width of the section;
  • the third segment body is used for joining on the back of adjacent photovoltaic cells.
  • the present invention designs corresponding welding ribbons for different positions connected to the battery.
  • the first section body is joined to the front of the battery to form a secondary reflection and maintain a small width to reduce the shielding of the battery by the welding ribbon.
  • the first segment includes a first substrate and a coating covering the surface of the first substrate;
  • the second segment includes an intermediate substrate and a coating covering the surface of the intermediate substrate;
  • the third segment The body includes a second substrate and a coating layer covering the surface of the second substrate.
  • the first segment body has a circular, semicircular or elliptical shape.
  • the arc surface of the upper part of the first section of the photovoltaic ribbon can effectively reflect the light from the surface of the ribbon to both sides for reuse, thereby increasing the power of the photovoltaic module.
  • the contour of the first segment body is a segment of a major arc and a chord connected between two ends of the major arc.
  • the contour of the first segment body is a segment of a minor arc and a chord connected between two ends of the minor arc.
  • the plane corresponding to the string is used for joining with the surface of the battery sheet, which can ensure joining reliability.
  • the second segment body is rectangular or trapezoidal.
  • the thickness of the second segment body is thinner, which can reduce the sheet spacing.
  • the third segment body is circular, semicircular or elliptical.
  • the contour of the third segment body is a major arc and a chord connected between two ends of the major arc.
  • the contour of the third segment body is a minor arc and a chord connected between two ends of the minor arc.
  • the third segment body is rectangular or trapezoidal.
  • two sides of the rectangular or trapezoidal cross section of the third segment body have convex arcs.
  • a relatively flat joining plane is provided on the third segment body, which can improve joining reliability.
  • Figure 1 is a top view of the connection state of the photovoltaic cell and the solder ribbon;
  • Figure 2 is a schematic cross-sectional view of Figure 1 along the length of the welding strip
  • Figure 3 is a schematic structural diagram of the first section of the photovoltaic ribbon in a circular cross-sectional profile
  • Fig. 4 is a structural schematic diagram of the first section of the photovoltaic ribbon having an elliptical cross-sectional profile
  • Figure 5 is a structural schematic diagram of a semicircular cross-sectional profile of the first section of the photovoltaic ribbon
  • Fig. 6 is a schematic structural diagram of a rectangular section of the second section of the photovoltaic ribbon
  • Figure 7 is a structural schematic diagram of the second section of the photovoltaic ribbon with a rectangular cross-section and arcs on both sides;
  • Figure 8 is a structural schematic diagram of the second section of the photovoltaic ribbon with a trapezoidal cross-section and arcs on both sides;
  • FIG. 9 is a schematic structural diagram of the third section of the present invention with a circular cross-sectional profile
  • Figure 10 is a schematic structural view of the third section of the present invention in which the cross-sectional profile of the body is elliptical;
  • FIG. 11 is a structural schematic diagram of the third section of the present invention in which the cross-sectional profile of the body is semicircular;
  • FIG. 12 is a schematic structural view of the third section of the present invention with a rectangular cross-sectional profile and arcs on both sides;
  • Fig. 13 is a schematic diagram of the structure of the second segment body of the present invention with indentations set at both ends.
  • 1-photovoltaic ribbon 10-first section body; 20-second section body; 201-first indentation; 202-second indentation; 30-third-section body; 90-photovoltaic cell.
  • a photovoltaic ribbon 1 includes at least one cycle of ribbon segments, and the single cycle of the ribbon segments includes:
  • the first segment body 10 is used for joining on the front grid line of the photovoltaic cell 90, and the first segment body 10 has a curved surface for reflecting the light incident on the surface of the photovoltaic ribbon;
  • the second section body 20 is correspondingly arranged between two adjacent photovoltaic cells 90.
  • the second section body 20 is flat, and the maximum width of the cross section of the second section body 20 is larger than that of the first section body 10. The maximum width of the cross section;
  • the third segment body 30 is used for joining on the back side of the adjacent photovoltaic cell 90.
  • the beneficial effect of using the above technical solution is that the corresponding welding ribbons are designed for different positions of the battery.
  • the first section is joined to the front of the battery to form a secondary reflection, and the width is kept small to reduce the shielding of the battery by the welding ribbon.
  • the first segment includes a first substrate and a coating covering the surface of the first substrate; the second segment includes an intermediate substrate and a coating covering the surface of the intermediate substrate; the third segment
  • the body includes a second substrate and a coating layer covering the surface of the second substrate.
  • the coating covering the surface of the substrate can be a metal coating or a non-metal coating, and different types of coatings can be applied to the reflective surface and the joint surface respectively, which can improve the reflectivity of the reflective surface and the joint surface.
  • the electrical conductivity and bonding force can be a metal coating or a non-metal coating, and different types of coatings can be applied to the reflective surface and the joint surface respectively, which can improve the reflectivity of the reflective surface and the joint surface.
  • the bonding method of the welding tape and the surface of the photovoltaic cell sheet in the present application may be welding or bonding.
  • the first segment body 10 is circular in cross section.
  • the first segment body 10 is elliptical in cross section.
  • the beneficial effect of adopting the above technical solution is that the arc surface of the upper part of the first section of the photovoltaic ribbon can effectively reflect and reuse the light from the surface of the ribbon to both sides, thereby increasing the power of the photovoltaic module.
  • the first segment body 10 is semicircular in cross section.
  • the beneficial effect of adopting the above technical solution is that the flat surface corresponding to the string is used for joining with the surface of the battery sheet, which can ensure the reliability of joining.
  • the second segment body 20 is rectangular in cross section.
  • the two sides of the rectangle of the second segment body 20 have convex arcs.
  • the second segment body 20 is trapezoidal in cross section.
  • the two sides of the trapezoid of the second segment body 20 have convex arcs.
  • the beneficial effect of adopting the above technical solution is that the thickness of the second segment body 20 is thinner, which can reduce the sheet spacing.
  • the third segment body 30 is circular in cross section.
  • the third segment body 30 is elliptical in cross section.
  • the third segment body 30 is semicircular in cross section.
  • the third segment body 30 is rectangular in cross section, with arcs on both sides of the rectangle.
  • the beneficial effect of adopting the above technical solution is that a relatively flat joint plane is provided, which can improve joint reliability.
  • a first indentation 201 and a second indentation 202 are respectively provided at both ends of the second segment body 20, and the first indentation 201 and the second indentation are respectively provided.
  • the length direction of 202 is set along the width direction of the welding tape.
  • the first indentation 201 is arranged on the lower surface of the welding tape close to the first section body 10
  • the second indentation 202 is arranged on the upper surface of the welding tape close to the third section body 30.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Photovoltaic Devices (AREA)

Abstract

A photovoltaic welding strip (1), comprising a first segment body (10), a second segment body (20) and a third segment body (30) which are connected in sequence. The first segment body (10) is used for connecting to a front face grid line of a photovoltaic cell (90), and the first segment body (10) is provided with an arc face used for reflecting light incident to a surface of the photovoltaic welding strip (1); the second segment body (20) is correspondingly arranged between two adjacent photovoltaic cells (90), and on a cross section, the second segment body (20) is flat; and the third segment body (30) is used for connecting to a back face of an adjacent photovoltaic cell (90). Corresponding photovoltaic welding strips (1) are designed according to different positions connected to a battery, the first segment body (10) is connected to the front face of the battery, secondary reflection is formed, a small width is kept, shielding of the photovoltaic welding strips (1) on the photovoltaic cells (90) is reduced, the light utilization rate is increased, and the power of a photovoltaic assembly is improved; and the second segment body (20) is used for transition between the two adjacent photovoltaic cells (90), and the thickness of the second segment body (20) is small, such that the cell spacing can be reduced.

Description

一种光伏焊带A photovoltaic ribbon 技术领域Technical field
本发明涉及光伏技术领域，具体涉及一种光伏焊带。The invention relates to the field of photovoltaic technology, in particular to a photovoltaic soldering tape.
背景技术Background technique
目前接合在光伏电池正面与背面的焊带为相同形状，相同尺寸，而现有与背面电池接合的焊带太厚，使得片间距不能进一步减少，否则容易引起电池片碎片或隐裂，而如果整体焊带做薄，为不影响焊带导电性能则焊带必然变宽，这会导致电池正面会有较多遮挡，组件功率将下降；较大的片间距降低了光伏组件的转换效率及光线利用率，同时也浪费了光伏组件的相关辅材。At present, the solder ribbons connected to the front and back of photovoltaic cells are of the same shape and size. The existing solder ribbons connected to the back of the battery are too thick, so that the gap between the sheets cannot be further reduced. Otherwise, it is easy to cause cell fragments or cracks. The overall solder ribbon is made thinner. In order not to affect the conductivity of the solder ribbon, the solder ribbon will inevitably become wider, which will cause more obstructions on the front of the battery, and the power of the module will decrease; a larger inter-chip spacing reduces the conversion efficiency and light of the photovoltaic module. Utilization rate, while also wasting related auxiliary materials for photovoltaic modules.
发明内容Summary of the invention
为了克服上述现有技术的不足，本发明的目的是提供了一种光伏焊带。In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a photovoltaic ribbon.
为达到上述目的，本发明解决其技术问题所采用的技术方案是：一种光伏焊带，包括至少一个周期的焊带段，单个周期的所述焊带段包括依次相连的：In order to achieve the above-mentioned objective, the technical solution adopted by the present invention to solve its technical problems is: a photovoltaic ribbon, including at least one cycle of ribbon segments, and the single cycle of the ribbon segments includes successively connected:
第一段体，其用于接合在光伏电池片的正面栅线上，所述第一段体具有用于将入射到光伏焊带表面的光线进行反射的弧面；The first segment body is used for joining on the front grid line of the photovoltaic cell, and the first segment body has a curved surface for reflecting the light incident on the surface of the photovoltaic ribbon;
第二段体，其对应设置在两相邻光伏电池片之间，在横截面上，所述第二段体成扁平形，所述第二段体横截面的最大宽度大于所述第一段体横截面的最大宽度；The second section body is correspondingly arranged between two adjacent photovoltaic cells. In the cross section, the second section body is flat, and the maximum width of the cross section of the second section body is greater than that of the first section body. The maximum width of the section;
第三段体，其用于接合在相邻光伏电池片的背面。The third segment body is used for joining on the back of adjacent photovoltaic cells.
本发明相较于现有技术，针对接合于电池的不同位置设计相应的焊带，第一段体接合于电池正面，形成二次反射，并保持较小宽度，减少焊带对电池片的遮挡，提高光线利用率，提高光伏组件功率；在相邻两电池片之间采用第二段体过渡，由于第二段体的厚度较薄可以减少片间距。Compared with the prior art, the present invention designs corresponding welding ribbons for different positions connected to the battery. The first section body is joined to the front of the battery to form a secondary reflection and maintain a small width to reduce the shielding of the battery by the welding ribbon. , Improve the utilization rate of light, and increase the power of photovoltaic modules; the second-stage body transition is adopted between two adjacent cells, and the thickness of the second-stage body can be reduced because the thickness of the second body is thinner.
在横截面上，所述第一段体包括第一基体和覆盖于第一基体表面的涂层；所述第二段体包括中间基体和覆盖于中间基体表面的涂层；所述第三段体包括第二基体和覆盖于第二基体表面的涂层。In cross section, the first segment includes a first substrate and a coating covering the surface of the first substrate; the second segment includes an intermediate substrate and a coating covering the surface of the intermediate substrate; the third segment The body includes a second substrate and a coating layer covering the surface of the second substrate.
进一步地，在横截面上，第一段体成圆形、半圆形或椭圆形。Further, in the cross section, the first segment body has a circular, semicircular or elliptical shape.
采用上述优选的方案，光伏焊带第一段体的上部分弧面可以有效地将焊带表面光线向两侧反射重新利用，提升光伏组件功率。By adopting the above-mentioned preferred solution, the arc surface of the upper part of the first section of the photovoltaic ribbon can effectively reflect the light from the surface of the ribbon to both sides for reuse, thereby increasing the power of the photovoltaic module.
进一步地，在横截面上，所述第一段体的轮廓为一段优弧以及连接在优弧两端点之间的弦。Further, in a cross section, the contour of the first segment body is a segment of a major arc and a chord connected between two ends of the major arc.
进一步地，在横截面上，所述第一段体的轮廓为一段劣弧以及连接在劣弧两端点之间的弦。Further, in the cross section, the contour of the first segment body is a segment of a minor arc and a chord connected between two ends of the minor arc.
采用上述优选的方案，弦所对应的平面用于与电池片表面接合，可以确保接合可靠性。With the above-mentioned preferred solution, the plane corresponding to the string is used for joining with the surface of the battery sheet, which can ensure joining reliability.
进一步地，在横截面上，所述第二段体成矩形或者梯形。Further, in cross section, the second segment body is rectangular or trapezoidal.
进一步地，在所述第二段体横截面矩形或梯形的两侧边具有外凸的圆弧。Further, there are convex arcs on both sides of the rectangular or trapezoidal cross-section of the second segment body.
采用上述优选的方案，第二段体的厚度较薄可以减少片间距。By adopting the above-mentioned preferred solution, the thickness of the second segment body is thinner, which can reduce the sheet spacing.
进一步地，在横截面上，所述第三段体成圆形、半圆形或椭圆形。Further, in cross section, the third segment body is circular, semicircular or elliptical.
进一步地，在横截面上，所述第三段体的轮廓为一段优弧以及连接在优弧两端点之间的弦。Further, in the cross section, the contour of the third segment body is a major arc and a chord connected between two ends of the major arc.
进一步地，在横截面上，所述第三段体的轮廓为一段劣弧以及连接在劣弧两端点之间的弦。Further, in the cross section, the contour of the third segment body is a minor arc and a chord connected between two ends of the minor arc.
进一步地，在横截面上，所述第三段体成矩形或者梯形。Further, in cross section, the third segment body is rectangular or trapezoidal.
进一步地，在横截面上，在所述第三段体横截面矩形或梯形的两侧边具有外凸的圆弧。Further, in the cross section, two sides of the rectangular or trapezoidal cross section of the third segment body have convex arcs.
采用上述优选的方案，在第三段体设置较平的接合平面，可以提高接合可靠性。By adopting the above-mentioned preferred solution, a relatively flat joining plane is provided on the third segment body, which can improve joining reliability.
附图说明Description of the drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面 将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.
图1是光伏电池片与焊带连接状态的俯视图；Figure 1 is a top view of the connection state of the photovoltaic cell and the solder ribbon;
图2是图1的顺着焊带长度方向的截面示意图；Figure 2 is a schematic cross-sectional view of Figure 1 along the length of the welding strip;
图3是光伏焊带第一段体截面轮廓成圆形的结构示意图；Figure 3 is a schematic structural diagram of the first section of the photovoltaic ribbon in a circular cross-sectional profile;
图4是光伏焊带第一段体截面轮廓成椭圆形的结构示意图；Fig. 4 is a structural schematic diagram of the first section of the photovoltaic ribbon having an elliptical cross-sectional profile;
图5是光伏焊带第一段体截面轮廓成半圆形的结构示意图；Figure 5 is a structural schematic diagram of a semicircular cross-sectional profile of the first section of the photovoltaic ribbon;
图6是光伏焊带第二段体截面轮廓成矩形的结构示意图；Fig. 6 is a schematic structural diagram of a rectangular section of the second section of the photovoltaic ribbon;
图7是光伏焊带第二段体截面矩形加两侧圆弧的结构示意图；Figure 7 is a structural schematic diagram of the second section of the photovoltaic ribbon with a rectangular cross-section and arcs on both sides;
图8是光伏焊带第二段体截面梯形加两侧圆弧的结构示意图；Figure 8 is a structural schematic diagram of the second section of the photovoltaic ribbon with a trapezoidal cross-section and arcs on both sides;
图9是本发明第三段体截面轮廓成圆形的结构示意图；9 is a schematic structural diagram of the third section of the present invention with a circular cross-sectional profile;
图10是本发明第三段体截面轮廓成椭圆形的结构示意图；Figure 10 is a schematic structural view of the third section of the present invention in which the cross-sectional profile of the body is elliptical;
图11是本发明第三段体截面轮廓成半圆形的结构示意图；11 is a structural schematic diagram of the third section of the present invention in which the cross-sectional profile of the body is semicircular;
图12是本发明第三段体截面轮廓成矩形加两侧圆弧的结构示意图；12 is a schematic structural view of the third section of the present invention with a rectangular cross-sectional profile and arcs on both sides;
图13是本发明第二段体两端设置压痕的结构示意图。Fig. 13 is a schematic diagram of the structure of the second segment body of the present invention with indentations set at both ends.
图中数字和字母所表示的相应部件的名称：The names of the corresponding parts indicated by the numbers and letters in the figure:
1-光伏焊带；10-第一段体；20-第二段体；201-第一压痕；202-第二压痕；30-第三段体；90-光伏电池片。1-photovoltaic ribbon; 10-first section body; 20-second section body; 201-first indentation; 202-second indentation; 30-third-section body; 90-photovoltaic cell.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
如图1-3所示，一种光伏焊带1，包括至少一个周期的焊带段， 单个周期的所述焊带段包括：As shown in Figures 1-3, a photovoltaic ribbon 1 includes at least one cycle of ribbon segments, and the single cycle of the ribbon segments includes:
第一段体10，其用于接合在光伏电池片90的正面栅线上，第一段体10具有用于将入射到光伏焊带表面的光线进行反射的弧面；The first segment body 10 is used for joining on the front grid line of the photovoltaic cell 90, and the first segment body 10 has a curved surface for reflecting the light incident on the surface of the photovoltaic ribbon;
第二段体20，其对应设置在两相邻光伏电池片90之间，在横截面上，第二段体20成扁平形，第二段体20横截面的最大宽度大于第一段体10横截面的最大宽度；The second section body 20 is correspondingly arranged between two adjacent photovoltaic cells 90. In the cross section, the second section body 20 is flat, and the maximum width of the cross section of the second section body 20 is larger than that of the first section body 10. The maximum width of the cross section;
第三段体30，其用于接合在相邻光伏电池片90的背面。The third segment body 30 is used for joining on the back side of the adjacent photovoltaic cell 90.
采用上述技术方案的有益效果是：针对接合于电池的不同位置设计相应的焊带，第一段体接合于电池正面，形成二次反射，并保持较小宽度，减少焊带对电池片的遮挡，提高光线利用率，提高光伏组件功率；在相邻两电池片之间采用第二段体过渡，由于第二段体的厚度较薄可以减少片间距。The beneficial effect of using the above technical solution is that the corresponding welding ribbons are designed for different positions of the battery. The first section is joined to the front of the battery to form a secondary reflection, and the width is kept small to reduce the shielding of the battery by the welding ribbon. , Improve the utilization rate of light, and increase the power of photovoltaic modules; the second-stage body transition is adopted between two adjacent cells, and the thickness of the second-stage body can be reduced because the thickness of the second body is thinner.
在横截面上，所述第一段体包括第一基体和覆盖于第一基体表面的涂层；所述第二段体包括中间基体和覆盖于中间基体表面的涂层；所述第三段体包括第二基体和覆盖于第二基体表面的涂层。覆盖在基体表面的涂层可以是金属涂层也可以是非金属涂层，还可以在反射面和接合面分别涂覆不同类型的涂层，这样可以针对性提高反射面的反光性、以及接合面的导电性和接合力。In cross section, the first segment includes a first substrate and a coating covering the surface of the first substrate; the second segment includes an intermediate substrate and a coating covering the surface of the intermediate substrate; the third segment The body includes a second substrate and a coating layer covering the surface of the second substrate. The coating covering the surface of the substrate can be a metal coating or a non-metal coating, and different types of coatings can be applied to the reflective surface and the joint surface respectively, which can improve the reflectivity of the reflective surface and the joint surface. The electrical conductivity and bonding force.
本申请焊带与光伏电池片表面接合的方式可以是焊接或者粘接方式。The bonding method of the welding tape and the surface of the photovoltaic cell sheet in the present application may be welding or bonding.
如图3所示，在本发明的另一些实施方式中，在横截面上，第一段体10成圆形。As shown in FIG. 3, in other embodiments of the present invention, the first segment body 10 is circular in cross section.
如图4所示，在本发明的另一些实施方式中，在横截面上，第一段体10成椭圆形。As shown in FIG. 4, in other embodiments of the present invention, the first segment body 10 is elliptical in cross section.
采用上述技术方案的有益效果是：光伏焊带第一段体的上部分弧面可以有效地将焊带表面光线向两侧反射重新利用，提升光伏组件功率。The beneficial effect of adopting the above technical solution is that the arc surface of the upper part of the first section of the photovoltaic ribbon can effectively reflect and reuse the light from the surface of the ribbon to both sides, thereby increasing the power of the photovoltaic module.
如图5所示，在本发明的另一些实施方式中，在横截面上，第一段体10成半圆形。采用上述技术方案的有益效果是：弦所对应的平 面用于与电池片表面接合，可以确保接合可靠性。As shown in FIG. 5, in other embodiments of the present invention, the first segment body 10 is semicircular in cross section. The beneficial effect of adopting the above technical solution is that the flat surface corresponding to the string is used for joining with the surface of the battery sheet, which can ensure the reliability of joining.
如图6所示，在本发明的另一些实施方式中，在横截面上，第二段体20成矩形。As shown in FIG. 6, in other embodiments of the present invention, the second segment body 20 is rectangular in cross section.
如图7所示，在本发明的另一些实施方式中，在横截面上，第二段体20矩形的两侧边具有外凸的圆弧。As shown in FIG. 7, in other embodiments of the present invention, in the cross section, the two sides of the rectangle of the second segment body 20 have convex arcs.
如图8所示，在本发明的另一些实施方式中，在横截面上，第二段体20成梯形。As shown in FIG. 8, in other embodiments of the present invention, the second segment body 20 is trapezoidal in cross section.
如图8所示，在本发明的另一些实施方式中，在横截面上，第二段体20梯形的两侧边具有外凸的圆弧。As shown in FIG. 8, in other embodiments of the present invention, in cross section, the two sides of the trapezoid of the second segment body 20 have convex arcs.
采用上述技术方案的有益效果是：第二段体20的厚度较薄可以减少片间距。The beneficial effect of adopting the above technical solution is that the thickness of the second segment body 20 is thinner, which can reduce the sheet spacing.
如图9所示，在本发明的另一些实施方式中，在横截面上，第三段体30成圆形。As shown in FIG. 9, in other embodiments of the present invention, the third segment body 30 is circular in cross section.
如图10所示，在本发明的另一些实施方式中，在横截面上，第三段体30成椭圆形。As shown in FIG. 10, in other embodiments of the present invention, the third segment body 30 is elliptical in cross section.
如图11所示，在本发明的另一些实施方式中，在横截面上，第三段体30成半圆形。As shown in FIG. 11, in other embodiments of the present invention, the third segment body 30 is semicircular in cross section.
如图12所示，在本发明的另一些实施方式中，在横截面上，第三段体30成矩形，在矩形两侧边具有圆弧。采用上述技术方案的有益效果是：设置较平的接合平面，可以提高接合可靠性。As shown in FIG. 12, in other embodiments of the present invention, the third segment body 30 is rectangular in cross section, with arcs on both sides of the rectangle. The beneficial effect of adopting the above technical solution is that a relatively flat joint plane is provided, which can improve joint reliability.
如图13所示，在本发明的另一些实施方式中，在第二段体20的两端分别设有第一压痕201和第二压痕202，第一压痕201和第二压痕202的长度方向沿着焊带的宽度方向设置，第一压痕201设置在靠近第一段体10的焊带下表面，第二压痕202设置在靠近第三段体30的焊带上表面。这样可以降低焊带在弯折时的应力，有效降低电池片的碎片率，增强产品可靠性。As shown in FIG. 13, in other embodiments of the present invention, a first indentation 201 and a second indentation 202 are respectively provided at both ends of the second segment body 20, and the first indentation 201 and the second indentation are respectively provided. The length direction of 202 is set along the width direction of the welding tape. The first indentation 201 is arranged on the lower surface of the welding tape close to the first section body 10, and the second indentation 202 is arranged on the upper surface of the welding tape close to the third section body 30. . This can reduce the stress of the solder ribbon during bending, effectively reduce the fragmentation rate of the battery, and enhance the reliability of the product.
上述实施例只为说明本发明的技术构思及特点，其目的在于让本领域普通技术人员能够了解本发明的内容并加以实施，并不能以此限制本发明的保护范围，凡根据本发明精神实质所作的等效变化或修饰， 都应涵盖在本发明的保护范围内。The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it, and they cannot limit the scope of protection of the present invention. All equivalent changes or modifications should be covered by the protection scope of the present invention.

Claims (11)

  1. 一种光伏焊带，其特征在于，包括至少一个周期的焊带段，单个周期的所述焊带段包括依次相连的：A photovoltaic ribbon, characterized in that it includes at least one cycle of ribbon segments, and a single cycle of the ribbon segments includes sequentially connected:
    第一段体，其用于接合在光伏电池片的正面栅线上，所述第一段体具有用于将入射到光伏焊带表面的光线进行反射的弧面；The first segment body is used for joining on the front grid line of the photovoltaic cell, and the first segment body has a curved surface for reflecting the light incident on the surface of the photovoltaic ribbon;
    第二段体，其对应设置在两相邻光伏电池片之间，在横截面上，所述第二段体成扁平形；The second segment body is correspondingly arranged between two adjacent photovoltaic cells, and in cross section, the second segment body is flat;
    第三段体，其用于接合在相邻光伏电池片的背面。The third segment body is used for joining on the back of adjacent photovoltaic cells.
  2. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第一段体成圆形、半圆形或椭圆形。The photovoltaic soldering tape according to claim 1, wherein the first segment body is circular, semicircular or elliptical in cross section.
  3. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第一段体的轮廓为一段优弧以及连接在优弧两端点之间的弦。The photovoltaic welding ribbon according to claim 1, wherein, in a cross section, the contour of the first segment body is a segment of a major arc and a chord connected between two ends of the major arc.
  4. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第一段体的轮廓为一段劣弧以及连接在劣弧两端点之间的弦。The photovoltaic welding ribbon according to claim 1, characterized in that, in the cross section, the contour of the first segment body is a segment of a minor arc and a chord connected between two ends of the minor arc.
  5. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第二段体成矩形或者梯形。The photovoltaic ribbon according to claim 1, wherein the second segment body is rectangular or trapezoidal in cross section.
  6. 根据权利要求5所述的光伏焊带，其特征在于，在所述第二段体横截面矩形或梯形的两侧边具有外凸的圆弧。The photovoltaic welding ribbon according to claim 5, characterized in that, the two sides of the second section of the rectangular or trapezoidal cross-section have convex arcs.
  7. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第三段体成圆形、半圆形或椭圆形。The photovoltaic soldering tape according to claim 1, wherein, in a cross section, the third segment body has a circular, semicircular or elliptical shape.
  8. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第三段体的轮廓为一段优弧以及连接在优弧两端点之间的弦。The photovoltaic welding ribbon according to claim 1, wherein, in the cross section, the contour of the third segment body is a segment of a major arc and a chord connected between two ends of the major arc.
  9. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第三段体的轮廓为一段劣弧以及连接在劣弧两端点之间的弦。The photovoltaic welding ribbon according to claim 1, wherein, in a cross section, the contour of the third segment body is a minor arc and a chord connected between two ends of the minor arc.
  10. 根据权利要求1所述的光伏焊带，其特征在于，在横截面上，所述第三段体成矩形或者梯形。The photovoltaic soldering tape according to claim 1, wherein, in a cross section, the third segment body is rectangular or trapezoidal.
  11. 根据权利要求10所述的光伏焊带，其特征在于，在所述第三段体横截面矩形或梯形的两侧边具有外凸的圆弧。The photovoltaic welding ribbon according to claim 10, wherein the third segment body has a convex arc on both sides of the rectangular or trapezoidal cross-section.
PCT/CN2020/129651 2019-11-20 2020-11-18 Photovoltaic welding strip WO2021098702A1 (en)

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