WO2018218473A1 - Battery piece back side structure for reducing fragment rate of solar modules - Google Patents
Battery piece back side structure for reducing fragment rate of solar modules Download PDFInfo
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- WO2018218473A1 WO2018218473A1 PCT/CN2017/086511 CN2017086511W WO2018218473A1 WO 2018218473 A1 WO2018218473 A1 WO 2018218473A1 CN 2017086511 W CN2017086511 W CN 2017086511W WO 2018218473 A1 WO2018218473 A1 WO 2018218473A1
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- 239000012634 fragment Substances 0.000 title abstract description 4
- 230000005684 electric field Effects 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000013467 fragmentation Methods 0.000 claims description 11
- 238000006062 fragmentation reaction Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007639 printing Methods 0.000 abstract description 4
- 229910000679 solder Inorganic materials 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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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
- H01L31/02—Details
- H01L31/0224—Electrodes
Definitions
- the invention relates to the technical field of solar energy utilization, in particular to a back structure of a battery sheet for reducing the fragmentation rate of a solar cell module.
- the back electrode setting mode when the battery piece of the original design is subjected to string welding, since the back electrode and the back electric field are not provided
- the gap has a certain overlapping area, and the height of the overlapping area is higher than the height of the back electrode, so that when the welding strip is pressed down the battery piece during the welding process, the force of the welding strip and the back electrode is uneven, which may cause the battery piece Fragmentation.
- the fragmentation rate of the solar cell during the manufacturing process is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, butylene oxide, so as to solve the problems raised in the above background art, so that the welding strip and the back electrode portion are uniformly stressed during the string welding, thereby reducing the force.
- the fragmentation rate of the solar cell during the manufacturing process.
- the present invention provides the following technical solutions:
- a back structure of a cell for reducing the fragmentation rate of a solar cell module including a back electrode and a back-up a back surface of the base material, a back electric field is disposed in the back electric field, and a back electrode is disposed in each of the electrode holes, and the back electrode is in contact with the base material ;
- the length of the back electrode is smaller than the length of the electrode hole, and a gap is left between both ends of the back electrode and both ends of the electrode hole.
- the length of the gap formed between the two ends of the back electrode and the two ends of the electrode hole is ⁇ 0 mm.
- the invention is provided with a gap between the back electrode and the electrode hole, and the length of the gap is greater than or equal to 0 mm, so that the position of the electrode hole after printing the back electric field does not overlap with the two ends of the back electrode, so that the back electric field of the battery sheet after printing is back
- the electrode direction height is at the same level, and the welding strip and the battery sheet are more uniformly stressed during the string welding, thereby reducing the fragmentation rate of the battery sheet during the manufacturing process.
- FIG. 1 is a schematic view showing the connection between a back electrode and a back electric field of the prior art
- FIG. 2 is a schematic cross-sectional view showing a welding of a battery sheet of the present invention
- FIG. 3 is a schematic view of a back electrode of the present invention.
- FIG. 4 is a schematic diagram of a back electric field of the present invention.
- FIG. 5 is a schematic view showing the back electric field and the back electrode overlap each other according to the present invention.
- the present invention provides a technical solution:
- the back structure of the battery sheet for reducing the fragmentation rate of the solar cell module proposed by the present invention includes The back electrode 1, the back electric field 2, and the base material 3 constitute a solar cell sheet.
- the back surface of the base material 3 is provided with a back electric field 2
- the back electric field 2 is provided with a plurality of electrode holes 21, and each of the electrode holes 21 is provided with a back electrode. 1.
- a back electrode 1 is disposed in each of the electrode holes 21, and the back electrode 1 is in contact with the base material 3 to form a connection between the back electrode 1 and the base material 3.
- the length of the back electrode 1 is smaller than the length of the electrode hole 21, so that both ends of the back electrode 1 and the electrode hole 21 have a gap 22, and the length of the gap 22 is ⁇ 0 mm, so that both ends of the back electrode 1 There is no overlapping area with the electrode hole 21, and no height difference can be generated.
- the soldering strip 4 and the battery sheet are more uniformly stressed, and the cell sheet is reduced from cracking and chipping, thereby reducing the fragmentation rate of the module end.
- the gap 22 formed between the two ends of the back electrode 1 and the two ends of the electrode hole 21 may be the same size, that is, when the electrode hole 21 has a length of 20 mm, if the back electrode 1 has a length of 14 mm, the back electrode
- the lengths of the gaps 22 at the two ends are respectively 3 mm, so that the two ends of the back electrode 1 have no overlapping area with the electrode holes 21, so that the force of the battery sheets during the string welding is more uniform, and no cracks or fragments are generated on the battery sheets.
Abstract
Disclosed in the invention is a battery piece back side structure for reducing fragment rate of solar modules. The structure comprises a back electrode, a back electric field and a substrate material. The back side of the substrate material is provided with the back electric field, and the back electric field is provided with several electrode holes, each electrode hole being internally provided with the back electrode. The back electrodes are contacted to the substrate material, the length of the back electrode is less than the length of the electrode hole, there are gaps at both terminals of the back electrodes from terminals of the electrode holes, and the length of the gap is more or equal to 0mm. In the present invention, gaps are provided between back electrodes and electrode holes, so that after printing of the back electric field, electrode hole positions and both terminals of the back electrodes are not overlapped, and after printing, height of the back electric field of the battery piece in the direction of the back electrodes is at a same level. During series welding of the battery pieces, solder strip and the battery piece are uniformly stressed, so that fragment rate of the battery piece is reduced during the manufacturing process of modules.
Description
本发明涉及太阳能利用技术领域，具体为一种降低太阳能电池组件碎片率的电池片背面结构。The invention relates to the technical field of solar energy utilization, in particular to a back structure of a battery sheet for reducing the fragmentation rate of a solar cell module.
太阳能光伏作为战略性新兴能源产业，由于其安全少污染和可再生性，成为人类发展所必须的清洁能源，近年来备受各国的重视和推崇然而光伏发电的成本是制约光伏产品更广泛应用的重要原因在组件端，降低成本主要有两个途径，一个是增加光伏产品的光电转换效率，另一个是降低光伏产品的生产成本很多新技术在增加光伏产品的光电转换效率的同时，往往提高了生产成本，但多主栅技术同时实现了增加光伏组件的转换效率和降低生产成本。As a strategic emerging energy industry, solar photovoltaic has become a clean energy necessary for human development due to its safety, less pollution and renewability. In recent years, it has received much attention and respect from all countries. However, the cost of photovoltaic power generation is a constraint to the wider application of photovoltaic products. The important reason is that there are two main ways to reduce costs at the component side. One is to increase the photoelectric conversion efficiency of photovoltaic products, and the other is to reduce the production cost of photovoltaic products. Many new technologies are increasing the photoelectric conversion efficiency of photovoltaic products. Production costs, but multiple main grid technologies simultaneously increase the conversion efficiency of photovoltaic modules and reduce production costs.
常规电池片制作组件在串焊时，由于焊带以及背电极的影响，背电极与背电场接触处的隐裂最为常见，最终造成电池片破损，随着主栅数量的增加，焊接时电池片破片率也随着上升，同时增加了组件的成本。In the conventional battery chip manufacturing assembly, due to the influence of the solder ribbon and the back electrode, the crack at the contact between the back electrode and the back electric field is the most common, which eventually causes the cell to be damaged. As the number of main gates increases, the cell is soldered. The fragmentation rate also rises, increasing the cost of components.
现有技术中，如说明书附图1所示，对于背电极设置方式，可以很明显的看出，当对原有设计的电池片进行串焊时，由于背电极与背电场之间不设置有间隙，且有一定重叠区域，且重叠区域的高度高于背电极的高度，使得焊带在焊接过程中向下挤压电池片时，焊带与背电极方向受力不均匀，会造成电池片碎片。In the prior art, as shown in FIG. 1 of the specification, it can be clearly seen for the back electrode setting mode that when the battery piece of the original design is subjected to string welding, since the back electrode and the back electric field are not provided The gap has a certain overlapping area, and the height of the overlapping area is higher than the height of the back electrode, so that when the welding strip is pressed down the battery piece during the welding process, the force of the welding strip and the back electrode is uneven, which may cause the battery piece Fragmentation.
发明内容Summary of the invention
本发明的目的在于提供一种降低太阳能电池组件碎片率的电池片背面结构，以解决上述背景技术中提出的问题，使电池片在串焊时，焊带与背电极部分受力均匀，从而降低太阳能电池片在制作组件过程的碎片率。It is an object of the present invention to provide a back surface structure of a battery sheet which reduces the fragmentation rate of a solar cell module, so as to solve the problems raised in the above background art, so that the welding strip and the back electrode portion are uniformly stressed during the string welding, thereby reducing the force. The fragmentation rate of the solar cell during the manufacturing process.
为实现上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种降低太阳能电池组件碎片率的电池片背面结构，包括背电极、背电
场以及基体材料，所述基体材料的背面设置有背电场，所述背电场中开设有若干电极孔，每个所述电极孔内均设置有背电极，所述背电极均与基体材料相接触；A back structure of a cell for reducing the fragmentation rate of a solar cell module, including a back electrode and a back-up
a back surface of the base material, a back electric field is disposed in the back electric field, and a back electrode is disposed in each of the electrode holes, and the back electrode is in contact with the base material ;
所述背电极的长度小于电极孔的长度，且背电极两端与电极孔两端均留有间隙。The length of the back electrode is smaller than the length of the electrode hole, and a gap is left between both ends of the back electrode and both ends of the electrode hole.
优选的，所述背电极两端与电极孔两端之间形成的间隙的长度均≥0mm。Preferably, the length of the gap formed between the two ends of the back electrode and the two ends of the electrode hole is ≥0 mm.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
本发明在背电极和电极孔之间设置有间隙，且间隙的长度大于等于0mm，使印刷背电场后电极孔位置与背电极两端无重叠，使印刷完成后的电池片的背电场在背电极方向高度在同一水平，电池片在串焊时，焊带与电池片受力更加均匀，从而降低电池片在制作组件过程的碎片率。The invention is provided with a gap between the back electrode and the electrode hole, and the length of the gap is greater than or equal to 0 mm, so that the position of the electrode hole after printing the back electric field does not overlap with the two ends of the back electrode, so that the back electric field of the battery sheet after printing is back The electrode direction height is at the same level, and the welding strip and the battery sheet are more uniformly stressed during the string welding, thereby reducing the fragmentation rate of the battery sheet during the manufacturing process.
图1为原有技术的背电极与背电场的连接示意图；1 is a schematic view showing the connection between a back electrode and a back electric field of the prior art;
图2为本发明电池片焊接截面示意图；2 is a schematic cross-sectional view showing a welding of a battery sheet of the present invention;
图3为本发明的背电极示意图；3 is a schematic view of a back electrode of the present invention;
图4为本发明的背电场示意图；4 is a schematic diagram of a back electric field of the present invention;
图5为本发明的背电场和背电极相互重叠示意图。FIG. 5 is a schematic view showing the back electric field and the back electrode overlap each other according to the present invention.
图中：1背电极、2背电场、21电极孔、22间隙、3基体材料、4焊带。In the figure: 1 back electrode, 2 back electric field, 21 electrode hole, 22 gap, 3 base material, 4 solder band.
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做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 are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
请参阅图1-5，本发明提供一种技术方案：Referring to FIG. 1-5, the present invention provides a technical solution:
本发明提出的一种降低太阳能电池组件碎片率的电池片背面结构，包括
背电极1、背电场2以及基体材料3，构成太阳电池片，基体材料3的背面设置有背电场2，背电场2中开设有若干电极孔21，每个电极孔21内均设置有背电极1，每个电极孔21内对应设有一根背电极1，背电极1均与基体材料3相接触，形成背电极1与基体材料3的连接。The back structure of the battery sheet for reducing the fragmentation rate of the solar cell module proposed by the present invention includes
The back electrode 1, the back electric field 2, and the base material 3 constitute a solar cell sheet. The back surface of the base material 3 is provided with a back electric field 2, and the back electric field 2 is provided with a plurality of electrode holes 21, and each of the electrode holes 21 is provided with a back electrode. 1. A back electrode 1 is disposed in each of the electrode holes 21, and the back electrode 1 is in contact with the base material 3 to form a connection between the back electrode 1 and the base material 3.
最主要的是，背电极1的长度小于电极孔21的长度，使得背电极1两端与电极孔21两端均留有间隙22，且间隙22的长度≥0mm，使得背电极1的两端与电极孔21无重叠区域，不能产生高度差，在电池片焊接焊带4时，焊带4与电池片受力更加均匀，减少电池片发生隐裂及碎片，从而降低组件端的碎片率。The main reason is that the length of the back electrode 1 is smaller than the length of the electrode hole 21, so that both ends of the back electrode 1 and the electrode hole 21 have a gap 22, and the length of the gap 22 is ≥ 0 mm, so that both ends of the back electrode 1 There is no overlapping area with the electrode hole 21, and no height difference can be generated. When the battery strip is welded to the soldering strip 4, the soldering strip 4 and the battery sheet are more uniformly stressed, and the cell sheet is reduced from cracking and chipping, thereby reducing the fragmentation rate of the module end.
作为一个优选的实施例，背电极1两端与电极孔21两端之间形成的间隙22大小可以相同，即当电极孔21开设长度为20mm时，若背电极1长度为14mm，则背电极1两端的空隙22长度分别为3mm，使得背电极1的两端与电极孔21无重叠区域，使得电池片串焊时受力更加均匀，不会对电池片造成产生隐裂或者碎片。As a preferred embodiment, the gap 22 formed between the two ends of the back electrode 1 and the two ends of the electrode hole 21 may be the same size, that is, when the electrode hole 21 has a length of 20 mm, if the back electrode 1 has a length of 14 mm, the back electrode The lengths of the gaps 22 at the two ends are respectively 3 mm, so that the two ends of the back electrode 1 have no overlapping area with the electrode holes 21, so that the force of the battery sheets during the string welding is more uniform, and no cracks or fragments are generated on the battery sheets.
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。
While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.
Claims (2)
- 一种降低太阳能电池组件碎片率的电池片背面结构，包括背电极(1)、背电场(2)以及基体材料(3)，所述基体材料(3)的背面设置有背电场(2)，其特征在于：所述背电场(2)中开设有若干电极孔(21)，每个所述电极孔(21)内均设置有背电极(1)，所述背电极(1)均与基体材料(3)相接触；A back structure of a cell for reducing the fragmentation rate of a solar cell module, comprising a back electrode (1), a back electric field (2), and a base material (3), the back surface of which is provided with a back electric field (2), The utility model is characterized in that: the back electric field (2) is provided with a plurality of electrode holes (21), and each of the electrode holes (21) is provided with a back electrode (1), and the back electrode (1) is connected with the base body Material (3) is in contact;所述背电极(1)的长度小于电极孔(21)的长度，且背电极(1)两端与电极孔(21)两端均留有间隙(22)。The length of the back electrode (1) is smaller than the length of the electrode hole (21), and a gap (22) is left at both ends of the back electrode (1) and both ends of the electrode hole (21).
- 根据权利要求1所述的一种降低太阳能电池组件碎片率的电池片背面结构，其特征在于：所述背电极(1)两端与电极孔(21)两端之间形成的间隙(22)的长度均≥0mm。 The back surface structure of the battery sheet for reducing the fragmentation rate of the solar cell module according to claim 1, characterized in that a gap (22) formed between both ends of the back electrode (1) and both ends of the electrode hole (21) The length is ≥ 0mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201780001106.5A CN107636842A (en) | 2017-05-31 | 2017-05-31 | A kind of cell piece backside structure for reducing solar cell module fragment rate |
| PCT/CN2017/086511 WO2018218473A1 (en) | 2017-05-31 | 2017-05-31 | Battery piece back side structure for reducing fragment rate of solar modules |
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| PCT/CN2017/086511 WO2018218473A1 (en) | 2017-05-31 | 2017-05-31 | Battery piece back side structure for reducing fragment rate of solar modules |
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| CN107636842A (en) * | 2017-05-31 | 2018-01-26 | 通威太阳能（合肥）有限公司 | A kind of cell piece backside structure for reducing solar cell module fragment rate |
| CN107068781A (en) * | 2017-06-19 | 2017-08-18 | 浙江晶科能源有限公司 | Solar cell and solar cell module |
| CN107284001A (en) * | 2017-07-03 | 2017-10-24 | 南京大全新能源有限公司 | A kind of solar energy manufacturing method of screen and its battery component |
| CN111063612B (en) * | 2019-12-09 | 2023-08-22 | 通威太阳能(眉山)有限公司 | Coating process for improving passivation effect of intrinsic amorphous silicon, passivation structure, heterojunction solar cell and preparation process |
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| WO2012114789A1 (en) * | 2011-02-24 | 2012-08-30 | 三洋電機株式会社 | Solar cell and solar cell module |
| CN102779862A (en) * | 2012-08-08 | 2012-11-14 | 苏州阿特斯阳光电力科技有限公司 | Back-side electrode structure of back-contact solar cell and manufacture method of back electrode structure |
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| CN107636842A (en) * | 2017-05-31 | 2018-01-26 | 通威太阳能（合肥）有限公司 | A kind of cell piece backside structure for reducing solar cell module fragment rate |
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| DE102009026027B4 (en) * | 2009-06-24 | 2013-05-29 | Hanwha Q.CELLS GmbH | Wafer solar cell |
| CN103296099A (en) * | 2013-06-17 | 2013-09-11 | 奥特斯维能源（太仓）有限公司 | Rear surface passivation point contact photovoltaic battery and production method thereof |
| CN204375763U (en) * | 2015-02-04 | 2015-06-03 | 苏州阿特斯阳光电力科技有限公司 | The back electrode structure of solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012114789A1 (en) * | 2011-02-24 | 2012-08-30 | 三洋電機株式会社 | Solar cell and solar cell module |
| CN102779862A (en) * | 2012-08-08 | 2012-11-14 | 苏州阿特斯阳光电力科技有限公司 | Back-side electrode structure of back-contact solar cell and manufacture method of back electrode structure |
| CN105405909A (en) * | 2015-12-18 | 2016-03-16 | 英利能源（中国）有限公司 | MWT (Metallization Wrap Through) solar battery |
| CN107636842A (en) * | 2017-05-31 | 2018-01-26 | 通威太阳能（合肥）有限公司 | A kind of cell piece backside structure for reducing solar cell module fragment rate |
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