CN108010979B - Welding strip for shingled photovoltaic module and shingled photovoltaic module - Google Patents
Welding strip for shingled photovoltaic module and shingled photovoltaic module Download PDFInfo
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- CN108010979B CN108010979B CN201711498325.7A CN201711498325A CN108010979B CN 108010979 B CN108010979 B CN 108010979B CN 201711498325 A CN201711498325 A CN 201711498325A CN 108010979 B CN108010979 B CN 108010979B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
- H10F19/902—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
- H10F19/902—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells
- H10F19/906—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells characterised by the materials of the structures
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- 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
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Abstract
Description
技术领域Technical Field
本发明涉及一种光伏组件用焊带，特别是一种用于叠瓦式光伏组件的焊带及叠瓦式光伏组件。The invention relates to a welding strip for a photovoltaic module, in particular to a welding strip for a shingled photovoltaic module and the shingled photovoltaic module.
背景技术Background technique
叠瓦式光伏组件是近年来刚兴起的光伏组件封装技术，该技术在于电池片间边部相互堆叠的连接方式，该连接方式充分利用组件内的间隙，在相同的面积下，可以放置多于常规组件6％以上的电池片。Shingled photovoltaic modules are a photovoltaic module packaging technology that has just emerged in recent years. The technology lies in the connection method of stacking the edges of the cells on each other. This connection method makes full use of the gaps within the module. In the same area, more than 6% more cells can be placed than conventional modules.
常规叠瓦组件电池片之间的连接方式有三种：一是焊带连接，表面主要以锡铅合金层为主，单面涂层厚度在15-25微米，此种焊带焊接温度高，碎片多；二是锡膏连接，直接用锡膏，可靠性比较差，热循环试验导致失效；三是导电胶连接，导电胶主要成分为银粉，成本高。There are three ways to connect the cells of conventional shingled modules: one is the connection with solder strips. The surface is mainly composed of a tin-lead alloy layer with a single-sided coating thickness of 15-25 microns. This type of solder strip has a high welding temperature and produces many fragments. The second is the connection with solder paste. The reliability is relatively poor and thermal cycle tests have caused failures. The third is the connection with conductive adhesive. The main component of the conductive adhesive is silver powder, which is costly.
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用于叠瓦式光伏组件的焊带及叠瓦式光伏组件。In order to overcome the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a welding strip for a shingled photovoltaic module and a shingled photovoltaic module.
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：In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problem is:
一种用于叠瓦式光伏组件的焊带，光伏组件中电池片采用叠瓦式排布，焊带设置在两电池片之间的叠加处，所述焊带包括铜质或铝质的基材、覆盖在基材表面的焊料层。A welding strip for a shingled photovoltaic module, in which cells are arranged in a shingled manner, the welding strip is arranged at the overlapping position between two cells, and comprises a copper or aluminum substrate and a solder layer covering the surface of the substrate.
本发明相较于现有技术，使用焊带将两电池片的叠加处焊接，焊接温度约为150-190℃，减少了电池碎片，提高了光伏组件可靠性，降低叠瓦光伏组件成本。Compared with the prior art, the present invention uses a welding ribbon to weld the overlapping parts of two battery cells, and the welding temperature is about 150-190° C., which reduces battery fragments, improves the reliability of photovoltaic modules, and reduces the cost of shingled photovoltaic modules.
进一步地，所述基材的截面成圆形或矩形。Furthermore, the cross section of the substrate is circular or rectangular.
进一步地，所述基材的表面成锯齿形，锯齿形表面被焊料层填充，焊带的表面为平整面。Furthermore, the surface of the substrate is serrated, the serrated surface is filled with a solder layer, and the surface of the solder strip is a flat surface.
采用上述优选的方案，锯齿形内容纳更多的焊料，增加了焊接力，提升了焊接可靠性。By adopting the above preferred solution, more solder can be accommodated in the sawtooth shape, thereby increasing the welding force and improving the welding reliability.
进一步地，所述焊料层为低温焊料、锡膏或导电胶。Furthermore, the solder layer is low-temperature solder, solder paste or conductive glue.
采用上述优选的方案，低温焊料能降低焊接温度，减少碎片；锡膏可以降低成本；导电胶具有较好的韧性，且焊接温度较低，可有效减少碎片。By adopting the above preferred solution, low-temperature solder can reduce welding temperature and reduce debris; solder paste can reduce costs; conductive adhesive has good toughness and low welding temperature, which can effectively reduce debris.
进一步地，所述焊带的边部包覆一截面成圆形的拉丝。Furthermore, the edge of the welding strip is covered with a drawing wire with a circular cross-section.
进一步地，所述焊带一边侧开有多个通孔，再通过一薄焊带将拉丝包裹，薄焊带两边侧点焊在焊带的通孔内。Furthermore, a plurality of through holes are opened on one side of the welding strip, and the wire drawing is then wrapped by a thin welding strip, and both sides of the thin welding strip are spot welded in the through holes of the welding strip.
采用上述优选的方案，焊带边部包裹拉丝，拉丝设置于两电池片叠加处的上边角，焊接前从两电池片叠加处的下边角将焊带向下方拽引，到位后拉丝与上电池片上边角形成限位，大大方便了焊带的铺排，提升了焊带与电池片的结合力。By adopting the above-mentioned preferred scheme, the edge of the welding ribbon is wrapped with a wire drawing, and the wire drawing is set at the upper corner where the two battery cells are overlapped. Before welding, the welding ribbon is pulled downward from the lower corner where the two battery cells are overlapped. After it is in place, the wire drawing forms a limit with the upper corner of the upper battery cell, which greatly facilitates the arrangement of the welding ribbon and improves the bonding strength between the welding ribbon and the battery cell.
一种叠瓦式光伏组件，包括上述的焊带，光伏组件中电池片采用叠瓦式排布，所述焊带设置在两电池片之间的叠加处。A shingled photovoltaic module comprises the above-mentioned welding strip, in which the cells are arranged in a shingled manner, and the welding strip is arranged at the overlapping position between two cells.
采用上述优选的方案，使用焊带将两电池片的叠加处焊接，焊接温度约为150-190℃，减少了电池碎片，提高了光伏组件可靠性，降低叠瓦光伏组件成本。By adopting the above preferred solution, the overlapping parts of the two battery cells are welded with a welding ribbon, and the welding temperature is about 150-190° C., which reduces battery fragments, improves the reliability of photovoltaic modules, and reduces the cost of shingled photovoltaic modules.
附图说明BRIEF 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 more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
图1是本发明一种实施方式的结构示意图；FIG1 is a schematic structural diagram of an embodiment of the present invention;
图2是本发明另一种实施方式的结构示意图；FIG2 is a schematic structural diagram of another embodiment of the present invention;
图3是本发明另一种实施方式的结构示意图；FIG3 is a schematic structural diagram of another embodiment of the present invention;
图4是本发明另一种实施方式的结构示意图；FIG4 is a schematic structural diagram of another embodiment of the present invention;
图5是本发明另一种实施方式的结构示意图；FIG5 is a schematic structural diagram of another embodiment of the present invention;
图6是本发明另一种实施方式的结构示意图；FIG6 is a schematic structural diagram of another embodiment of the present invention;
图7是本发明另一种实施方式的结构示意图。FIG. 7 is a schematic structural diagram of another embodiment of the present invention.
图中数字和字母所表示的相应部件的名称：The numbers and letters in the figure represent the names of the corresponding parts:
1-焊带；11-基材；12-焊料层；13-拉丝；14-通孔；15-薄焊带；2-电池片。1- solder strip; 11- substrate; 12- solder layer; 13- wire drawing; 14- through hole; 15- thin solder strip; 2- battery 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 following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
为了达到本发明的目的，如图1-4所示，本发明的一种实施方式为：一种用于叠瓦式光伏组件的焊带1，光伏组件中电池片2采用叠瓦式排布，焊带1设置在两电池片2之间的叠加处，焊带1包括铜质或铝质的基材11、覆盖在基材11表面的焊料层12。In order to achieve the purpose of the present invention, as shown in Figures 1-4, an embodiment of the present invention is: a welding strip 1 for a shingled photovoltaic module, in which the battery cells 2 are arranged in a shingled manner, and the welding strip 1 is arranged at the overlapping position between the two battery cells 2. The welding strip 1 includes a copper or aluminum substrate 11 and a solder layer 12 covering the surface of the substrate 11.
本发明的有益效果是：使用焊带1将两电池片2的叠加处焊接，焊接温度约为150-190℃，减少了电池碎片，提高了光伏组件可靠性，降低叠瓦光伏组件成本。The beneficial effects of the present invention are: using the welding strip 1 to weld the overlapping parts of the two battery cells 2, the welding temperature is about 150-190°C, reducing battery fragments, improving the reliability of the photovoltaic module, and reducing the cost of the shingled photovoltaic module.
在本发明的另一些实施方式中，如图1中，基材11的截面成圆形；如图2中，基材11的截面为矩形。采用上述技术方案的有益效果是：圆形焊带能节约制造成本，矩形焊带提高焊带与电池片的接触面积，提升焊接力。In other embodiments of the present invention, as shown in FIG1 , the cross section of the substrate 11 is circular; as shown in FIG2 , the cross section of the substrate 11 is rectangular. The beneficial effects of the above technical solution are: the circular welding strip can save manufacturing costs, and the rectangular welding strip increases the contact area between the welding strip and the battery cell, thereby improving the welding force.
在本发明的另一些实施方式中，如图3中，基材11的上、下表面成锯齿形，焊带1的上、下表面为平整面。采用上述技术方案的有益效果是：锯齿形内能容纳更多的焊料，增加了焊接力，提升了焊接可靠性。In other embodiments of the present invention, as shown in Figure 3, the upper and lower surfaces of the substrate 11 are serrated, and the upper and lower surfaces of the solder strip 1 are flat. The beneficial effect of the above technical solution is that the serrated shape can accommodate more solder, increase the welding force, and improve the welding reliability.
在本发明的另一些实施方式中，焊料层12为低温焊料、锡膏或导电胶。采用上述技术方案的有益效果是：低温焊料能降低焊接温度，减少碎片；锡膏可以降低成本；导电胶具有较好的韧性，且焊接温度较低，可有效减少碎片。In other embodiments of the present invention, the solder layer 12 is low-temperature solder, solder paste or conductive adhesive. The beneficial effects of the above technical solution are: low-temperature solder can reduce the welding temperature and reduce debris; solder paste can reduce costs; conductive adhesive has good toughness and low welding temperature, which can effectively reduce debris.
在本发明的另一些实施方式中，如图5-7所示，焊带1的边部包覆一截面成圆形的拉丝13；拉丝13为易熔金属丝，焊带1一边侧开有多个通孔14，再通过一薄焊带15将拉丝13包裹，薄焊带15两边侧点焊在焊带1的通孔14内。采用上述技术方案的有益效果是：焊带1边部包裹拉丝13，拉丝13设置于两电池片2叠加处的上边角，焊接前从两电池片2叠加处的下边角将焊带1向下方拽引，到位后拉丝13与上电池片2上边角形成限位，大大方便了焊带1的铺排；焊接后，拉丝13熔融提升了焊带1与电池片2的结合力，提升光伏组件可靠性。In other embodiments of the present invention, as shown in Figs. 5-7, the edge of the welding strip 1 is covered with a wire drawing 13 with a circular cross section; the wire drawing 13 is a fusible metal wire, and a plurality of through holes 14 are opened on one side of the welding strip 1, and then the wire drawing 13 is wrapped by a thin welding strip 15, and the two sides of the thin welding strip 15 are spot welded in the through holes 14 of the welding strip 1. The beneficial effects of the above technical solution are: the edge of the welding strip 1 is wrapped with the wire drawing 13, and the wire drawing 13 is arranged at the upper corner where the two battery cells 2 overlap, and the welding strip 1 is pulled downward from the lower corner where the two battery cells 2 overlap before welding, and after it is in place, the wire drawing 13 forms a limit with the upper corner of the upper battery cell 2, which greatly facilitates the layout of the welding strip 1; after welding, the wire drawing 13 melts to improve the bonding strength between the welding strip 1 and the battery cell 2, and improves the reliability of the photovoltaic module.
如图4所示，一种叠瓦式光伏组件，包括焊带1，光伏组件中电池片2采用叠瓦式排布，焊带1设置在两电池片2之间的叠加处。采用上述技术方案的有益效果是：使用焊带1将两电池片2的叠加处焊接，焊接温度约为150-190℃，减少了电池碎片，提高了光伏组件可靠性，降低叠瓦光伏组件成本。As shown in FIG4 , a shingled photovoltaic module includes a welding strip 1, in which the cells 2 are arranged in a shingled manner, and the welding strip 1 is arranged at the overlapping portion between two cells 2. The beneficial effect of adopting the above technical solution is: the overlapping portion of the two cells 2 is welded using the welding strip 1, the welding temperature is about 150-190° C., the cell fragments are reduced, the reliability of the photovoltaic module is improved, and the cost of the shingled photovoltaic module is reduced.
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 embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
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