CN106684190A - Overlapping structure for solar panel - Google Patents
Overlapping structure for solar panel Download PDFInfo
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- CN106684190A CN106684190A CN201710071054.0A CN201710071054A CN106684190A CN 106684190 A CN106684190 A CN 106684190A CN 201710071054 A CN201710071054 A CN 201710071054A CN 106684190 A CN106684190 A CN 106684190A
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 52
- 239000010703 silicon Substances 0.000 claims abstract description 52
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims 1
- 239000003292 glue Substances 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 7
- 238000003466 welding Methods 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000004021 metal welding Methods 0.000 abstract 2
- 235000012431 wafers Nutrition 0.000 description 26
- 210000004027 cell Anatomy 0.000 description 19
- 238000005520 cutting process Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Classifications
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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
- H10F19/904—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells characterised by the shapes of the structures
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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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- Photovoltaic Devices (AREA)
Abstract
本发明公开一种太阳能板的搭接结构，改变现有的太阳能板电池组件两个相邻电池片之间通过焊带连接的结构，将第一电池硅片另一端下部设有的第一正电极与第二电池硅片一端上部设有的第二负电极通过导电胶搭接在一起，无需采用金属焊带，减少了金属焊带电池硅片的压力，有效防止电池硅片被压碎，同时减少了两者连接处的电阻，提高组件的电力输出；还杜绝因金属焊带受热软化后造成的电池组件短路；并且使得相邻两个电池片直接搭接在一起为叠片结构，遮挡电池受光面积即提高太阳能电池组件的有效发电面积，减少光学损失，提高电池的效率和组件的效率。
The invention discloses an overlapping structure of a solar panel, which changes the structure in which two adjacent battery pieces of a solar panel battery assembly are connected by welding strips, and installs a first positive electrode at the lower part of the other end of the first battery silicon piece. The electrode and the second negative electrode provided on the upper part of the silicon chip of the second battery are lapped together through conductive glue, without the use of metal welding strips, which reduces the pressure on the silicon chip of the battery with metal welding strips, and effectively prevents the silicon chip of the battery from being crushed. At the same time, the resistance at the connection between the two is reduced to improve the power output of the module; it also eliminates the short circuit of the battery module caused by the softening of the metal ribbon by heat; The light-receiving area of the battery is to increase the effective power generation area of the solar cell module, reduce optical loss, and improve the efficiency of the battery and the module.
Description
技术领域technical field
本发明涉及光伏领域，具体涉及一种太阳能板的搭接结构。The invention relates to the photovoltaic field, in particular to an overlapping structure of a solar panel.
背景技术Background technique
单个太阳能电池片的输出电压、电流和功率都很小，一般来说，输出电压只有0.5V左右，输出功率只有1～4W，不能满足作为电源应用的要求；为提高输出功率，需将多个单个太阳能电池片合理连接起来，并封装成组件；在需要更大功率的场合，则需要将多个组件连接成为方阵，以向负载提供数值更大的电流、电压输出。The output voltage, current and power of a single solar cell are very small. Generally speaking, the output voltage is only about 0.5V, and the output power is only 1-4W, which cannot meet the requirements of power supply applications; in order to increase the output power, multiple Individual solar cells are reasonably connected and packaged into components; where higher power is required, multiple components need to be connected into a square array to provide a larger value of current and voltage output to the load.
太阳能电池片由于其吸收光而产生电流的特殊性，要求其面积较大，其造型为薄片状，采光面为负极，背光面为正极，将单体电池片连接起来的方式与普通蓄电池原理相同，需将电池片正负极首尾相连，因此在生产时我们采用金属焊带一端焊接在电池片的正极，另一端焊接在电池片的负极，以此方式将电池片串接起来，提高输出功率；目前太阳能电池组件中相邻两片电池片之间的金属焊带连接结构如图1所示，每个电池片都由负电极1，电池硅片2和正电极3组成，相邻两块电池片之间的电极连接关系为：第一块电池片上的负电极1与第二块电池片上的正电极3为同一根金属焊带，并且每单个电池片上有4根焊带，焊带的宽度为1.3mm；两个相连电池片通过红外焊接以实现串联或者并联；但是通过焊带连接的电池片容易破损，而且受热后会下垂，容易造成短路，并且焊接时受热不均匀，十分容易导致过焊，造成其电池片的性能受损，导致太阳能电池片组件的转换效率下降；而且其经过TC50测试后电池片断片的情况十分严重，而且后背板十分容易烧坏，功率衰减过大，性能也不佳。Due to the particularity of the solar cell absorbing light and generating current, it is required to have a large area. Its shape is thin, the lighting surface is the negative electrode, and the backlight surface is the positive electrode. The way to connect the single cells is the same as that of ordinary batteries. , it is necessary to connect the positive and negative poles of the battery slices end to end. Therefore, during production, we use metal ribbons to weld one end to the positive pole of the battery slice and the other end to the negative pole of the battery slice. In this way, the battery slices are connected in series to increase the output power. ; At present, the metal ribbon connection structure between two adjacent cells in a solar cell module is shown in Figure 1, each cell is composed of a negative electrode 1, a cell silicon chip 2 and a positive electrode 3, and two adjacent cells The electrode connection relationship between the sheets is: the negative electrode 1 on the first battery sheet and the positive electrode 3 on the second battery sheet are the same metal ribbon, and there are 4 ribbons on each single battery sheet, the width of the ribbon It is 1.3mm; two connected cells can be connected in series or parallel by infrared welding; however, the cells connected by welding strips are easy to be damaged, and will sag after being heated, which is likely to cause a short circuit, and the heating is uneven during welding, which is very easy to cause overheating. Welding, resulting in damage to the performance of the cells, resulting in a decline in the conversion efficiency of solar cell components; and after passing the TC50 test, the condition of the cell fragments is very serious, and the backplane is very easy to burn out, the power attenuation is too large, and the performance Not good either.
发明内容Contents of the invention
本发明的目的是为提供一种能提高电池效率和组件效率，防止功率衰减，可靠性好，性能达标的太阳能板的搭接结构。The purpose of the present invention is to provide a solar panel lap joint structure that can improve battery efficiency and module efficiency, prevent power attenuation, have good reliability, and meet performance standards.
本发明通过以下技术方案实现：一种太阳能板的搭接结构，包括相邻间隔且结构相同的第一电池片和第二电池片，所述第一电池片包括第一负电极、第一正电极和第一电池硅片，所述第二电池片包括第二负电极、第二正电极和第二电池硅片，所述第一负电极和第一正电极分别设置在第一电池硅片的采光面和背光面，且第一负电极设置在第一电池硅片一端的上部，第一正电极设置在第一电池硅片另一端的下部；所述第二负电极和第二正电极分别设置在第二电池硅片的采光面和背光面，且第二负电极设置在第二电池硅片一端的上部，第二正电极设置在第二电池硅片另一端的下部；所述第一电池硅片另一端下部设有的第一正电极与第二电池硅片一端上部设有的第二负电极通过导电胶搭接在一起。The present invention is achieved through the following technical solutions: an overlapping structure of a solar panel, comprising a first cell and a second cell that are adjacent to each other and have the same structure, the first cell includes a first negative electrode, a first positive electrode and the first battery silicon slice, the second battery slice includes a second negative electrode, a second positive electrode and a second battery silicon slice, and the first negative electrode and the first positive electrode are respectively arranged on the first battery silicon slice The lighting surface and the backlight surface, and the first negative electrode is arranged on the upper part of one end of the silicon wafer of the first battery, and the first positive electrode is arranged on the lower part of the other end of the silicon wafer of the first battery; the second negative electrode and the second positive electrode respectively arranged on the daylighting surface and the backlight surface of the silicon wafer of the second battery, and the second negative electrode is arranged on the upper part of one end of the silicon wafer of the second battery, and the second positive electrode is arranged on the lower part of the other end of the silicon wafer of the second battery; The first positive electrode provided at the lower part of the other end of the silicon wafer of the first battery is overlapped with the second negative electrode provided at the upper part of one end of the silicon wafer of the second battery through conductive glue.
作为优选，所述导电胶搭接的宽度为2mm至3mm之间。Preferably, the width of the overlap of the conductive adhesive is between 2mm and 3mm.
作为优选，所述第一电池硅片与第二电池硅片之间搭接为5处。Preferably, there are 5 overlaps between the silicon wafers of the first battery and the silicon wafers of the second battery.
作为优选，所述第一电池硅片另一端下部到第二电池硅片一端上部的搭接长度为150mm至160mm之间。Preferably, the overlapping length between the lower part of the other end of the silicon wafer of the first battery and the upper part of one end of the silicon wafer of the second battery is between 150 mm and 160 mm.
作为优选，所述第一电池片和第二电池片都是通过激光切割而成。Preferably, both the first battery sheet and the second battery sheet are cut by laser.
本发明改变现有的太阳能板电池组件两个相邻电池片之间通过焊带连接的结构，将第一电池硅片另一端下部设有的第一正电极与第二电池硅片一端上部设有的第二负电极通过导电胶搭接在一起，无需采用金属焊带，减少了金属焊带电池硅片的压力，有效防止电池硅片被压碎，同时减少了两者连接处的电阻，提高组件的电力输出；还杜绝因金属焊带受热软化后造成的电池组件短路；并且使得相邻两个电池片直接搭接在一起为叠片结构，遮挡电池受光面积即提高太阳能电池组件的有效发电面积，减少光学损失，提高电池的效率和组件的效率。The present invention changes the structure of connecting two adjacent battery slices of the existing solar panel battery assembly through welding strips, and sets the first positive electrode on the lower part of the other end of the silicon slice of the first battery and the upper part of one end of the silicon slice of the second battery. Some second negative electrodes are lapped together by conductive glue, without the use of metal ribbons, which reduces the pressure on the silicon wafers of the metal ribbons, effectively prevents the silicon wafers from being crushed, and reduces the resistance at the connection between the two. Improve the power output of the module; also eliminate the short circuit of the battery module caused by the heat softening of the metal ribbon; and make the two adjacent battery pieces directly overlapped together to form a laminated structure, blocking the light-receiving area of the battery and improving the effectiveness of the solar battery module Power generation area, reduce optical loss, improve cell efficiency and module efficiency.
与现有技术相比，本发明的有益之处在于：1）增加有效的发电面积，减少光学损失，提高电池效率和组件效率；2）采用导电胶进行搭接，提高可靠性和稳定性；3）防止后背板烧坏和功率衰减以及断片情况的发生；4）性能提高，防止老化。Compared with the prior art, the present invention has the advantages of: 1) increasing the effective power generation area, reducing optical loss, and improving cell efficiency and module efficiency; 2) using conductive glue for lap joints to improve reliability and stability; 3) Prevent the backplane from burning out, power attenuation and fragmentation; 4) Improve performance and prevent aging.
附图说明Description of drawings
图1为现有的太阳能板电池组件焊带的连接结构示意图。Fig. 1 is a schematic diagram of the connection structure of the existing solar panel battery assembly ribbon.
图2为本发明的结构示意图。Fig. 2 is a structural schematic diagram of the present invention.
图3为本发明的俯视示意图。Fig. 3 is a schematic top view of the present invention.
具体实施方式detailed description
下面结合附图与具体实施方式，对本发明作进一步描述。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
见图1至图3，一种太阳能板的搭接结构，包括相邻间隔且结构相同的第一电池片和第二电池片，所述第一电池片包括第一负电极A2、第一正电极A1和第一电池硅片A，所述第二电池片包括第二负电极B2、第二正电极B1和第二电池硅片B，所述第一负电极A2和第一正电极A1分别设置在第一电池硅片A的采光面和背光面，且第一负电极A2设置在第一电池硅片A一端的上部，第一正电极A1设置在第一电池硅片A另一端的下部；所述第二负电极B2和第二正电极B1分别设置在第二电池硅片B的采光面和背光面，且第二负电极B2设置在第二电池硅片B一端的上部，第二正电极B1设置在第二电池硅片B另一端的下部；所述第一电池硅片A另一端下部设有的第一正电极A1与第二电池硅片B一端上部设有的第二负电极B2通过导电胶搭C接在一起；所述导电胶C搭接的宽度为2mm至3mm之间；所述第一电池硅片A与第二电池硅片B之间搭接为5处；所述第一电池硅片A另一端下部到第二电池硅片B一端上部的搭接长度为150mm至160mm之间。See Fig. 1 to Fig. 3, an overlapping structure of a solar panel, including a first battery piece and a second battery piece with adjacent intervals and the same structure, the first battery piece includes a first negative electrode A2, a first positive electrode Electrode A1 and the first battery silicon slice A, the second battery slice includes a second negative electrode B2, a second positive electrode B1 and a second battery silicon slice B, the first negative electrode A2 and the first positive electrode A1 are respectively It is arranged on the daylighting surface and the backlight surface of the silicon wafer A of the first battery, and the first negative electrode A2 is arranged on the upper part of one end of the silicon wafer A of the first battery, and the first positive electrode A1 is arranged on the lower part of the other end of the silicon wafer A of the first battery ; The second negative electrode B2 and the second positive electrode B1 are respectively arranged on the lighting surface and the backlight surface of the silicon wafer B of the second battery, and the second negative electrode B2 is arranged on the top of one end of the silicon wafer B of the second battery, and the second The positive electrode B1 is arranged on the lower part of the other end of the silicon wafer B of the second battery; The electrodes B2 are connected together by conductive glue C; the width of the conductive glue C overlap is between 2mm and 3mm; the overlap between the first battery silicon wafer A and the second battery silicon wafer B is 5 places; The overlapping length between the lower part of the other end of the silicon wafer A of the first battery and the upper part of one end of the silicon wafer B of the second battery is between 150 mm and 160 mm.
本实施方式中，所述第一电池片和第二电池片都是通过激光切割而成，其摆片的精度为±0.2mm，切割次数在3至5次之间，切割的深度达到80~100um，多次切割能减小热影响区，防止电池片翘曲影响切割精度。In this embodiment, both the first battery sheet and the second battery sheet are cut by laser, the precision of the swing sheet is ±0.2mm, the cutting times are between 3 and 5 times, and the cutting depth reaches 80~ 100um, multiple cuts can reduce the heat-affected zone and prevent cell warping from affecting cutting accuracy.
本实施方式中，常规组件焊接遮挡电池受光面积的比例为3.34%，而采用本发明所用的第一电池硅片A另一端下部设有的第一正电极A1与第二电池硅片B一端上部设有的第二负电极B2通过导电胶搭C接在一起的叠片结构遮挡受光面积比例则为6.42%；叠片结构相比与常规组件电池遮光面积增加了3.08%，所以增加的遮光面积即为有效的发电面积，因此本发明采用的叠片结构相比于常规组件光学损失减少3.08%；而且本发明采用导电胶进行搭接，其电池硅片保证正反面满极存在，提高组件的可靠性；而且经过TC50测试后后背不会被烧坏，功率衰减少，并且防止老化，电池效率和组件效率大幅度提高。In this embodiment, the ratio of conventional component welding to block the light-receiving area of the battery is 3.34%, while the first positive electrode A1 provided at the lower part of the other end of the first battery silicon wafer A used in the present invention and the upper part of the second battery silicon wafer B are used. The ratio of the light-receiving area of the laminated sheet structure with the second negative electrode B2 connected together by conductive glue is 6.42%. That is, the effective power generation area, so the optical loss of the lamination structure adopted in the present invention is reduced by 3.08% compared with conventional components; and the present invention uses conductive glue for lap joints, and the silicon wafers of the battery ensure that the positive and negative sides are full of poles, improving the reliability of the components. Reliability; and after the TC50 test, the back will not be burned out, the power attenuation is reduced, and aging is prevented, and the battery efficiency and component efficiency are greatly improved.
本发明的保护范围包括但不限于以上实施方式，本发明的保护范围以权利要求书为准，任何对本技术做出的本领域的技术人员容易想到的替换、变形、改进均落入本发明的保护范围。The scope of protection of the present invention includes but is not limited to the above embodiments. The scope of protection of the present invention is based on the claims. Any replacement, deformation, and improvement that are easily conceived by those skilled in the art for this technology fall within the scope of the present invention. protected range.
Claims (5)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611212A (en) * | 2017-10-13 | 2018-01-19 | 浙江昱辉阳光能源江苏有限公司 | A kind of solar battery sheet and component based on quartering section |
| CN107611198A (en) * | 2017-09-18 | 2018-01-19 | 苏州英鹏新能源有限公司 | Imbrication component and solar panel |
| CN109802002A (en) * | 2019-03-05 | 2019-05-24 | 成都晔凡科技有限公司 | Imbrication Double-sided battery pack and its manufacturing method |
| CN110061081A (en) * | 2019-05-28 | 2019-07-26 | 浙江晶科能源有限公司 | Photovoltaic cell array and photovoltaic module |
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| CN107611198A (en) * | 2017-09-18 | 2018-01-19 | 苏州英鹏新能源有限公司 | Imbrication component and solar panel |
| CN107611212A (en) * | 2017-10-13 | 2018-01-19 | 浙江昱辉阳光能源江苏有限公司 | A kind of solar battery sheet and component based on quartering section |
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| CN110061081A (en) * | 2019-05-28 | 2019-07-26 | 浙江晶科能源有限公司 | Photovoltaic cell array and photovoltaic module |
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