CN204289473U - A kind of solar battery sheet grid line structure of positive electrode - Google Patents
A kind of solar battery sheet grid line structure of positive electrode Download PDFInfo
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- CN204289473U CN204289473U CN201420803141.2U CN201420803141U CN204289473U CN 204289473 U CN204289473 U CN 204289473U CN 201420803141 U CN201420803141 U CN 201420803141U CN 204289473 U CN204289473 U CN 204289473U
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- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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Abstract
本实用新型公开了一种太阳能电池片正电极栅线结构，所述正电极栅线结构至少包含4个重复结构单元；所述的重复结构单元为正六边形结构，每个重复结构单元的中心处有一个节点；所述节点位置设有通孔，电池背面的正电极连接点通过通孔中的导电浆料与正面栅线的所述节点相连接；所述的正六边形重复结构单元栅线图中有若干个小等边三角形组成，形成分支栅线，分支栅线同一方向互相等间距平行。本实用新型的有益效果是提高电池片的光电转换效率，降低生产成本。
The utility model discloses a positive electrode grid line structure of a solar battery sheet. The positive electrode grid line structure includes at least four repeating structural units; the repeating structural units are regular hexagonal structures, and the center of each repeating structural unit There is a node at the node; the node position is provided with a through hole, and the positive electrode connection point on the back of the battery is connected to the node of the front grid line through the conductive paste in the through hole; the regular hexagonal repeating structure unit grid The line diagram is composed of several small equilateral triangles, forming branch grid lines, and the branch grid lines are parallel to each other at equal intervals in the same direction. The beneficial effect of the utility model is to improve the photoelectric conversion efficiency of the battery sheet and reduce the production cost.
Description
技术领域 technical field
本实用新型涉及晶硅太阳能电池片制造领域，具体地涉及一种太阳能电池片正电极栅线结构。 The utility model relates to the field of manufacturing crystalline silicon solar cells, in particular to a solar cell positive electrode grid wire structure.
背景技术 Background technique
随着硅太阳能电池技术的发展，太阳能已是解决现今能源危机的一个重要途径。而进一步发展太阳能电池产业，首要解决的问题就是要降低其生产成本，其中提高太阳能电池片的光电转换效率是降低成本的主要手段之一。目前，光伏行业学者在此方面的研究主要集中在表面遮光损失、表面陷光以及电极接触等方面。大多数太阳能电池片厂家采用降低栅线宽度的方法来减少表面遮光，但是细栅线会因增加电极接触电阻而降低其光电转换效率。 With the development of silicon solar cell technology, solar energy has become an important way to solve the current energy crisis. To further develop the solar cell industry, the first problem to be solved is to reduce its production cost, and improving the photoelectric conversion efficiency of solar cells is one of the main means to reduce costs. At present, scholars in the photovoltaic industry mainly focus on surface shading loss, surface light trapping, and electrode contact. Most manufacturers of solar cells use the method of reducing the grid line width to reduce surface shading, but thin grid lines will reduce the photoelectric conversion efficiency due to increased electrode contact resistance.
金属电极绕通（Metal Wrap Through，简称MWT）太阳电池是将电池正面收集的电子通过孔洞中填充的金属转移至电池背面，不需要在电池的正面设计主栅线。因此，MWT电池片表面有更大的面积来收集光子并将其转化为电能。该结构电池基本消除了主栅线电极的遮光损失，更加充分地利用了光照面积，提高了电池片的光电转换效率；同时，还降低了组件封装难度、简化制备工艺。目前MWT单个电池效率能达到20%左右，组件效率能达到17%，其主要优点在于实现了共面拼装和减小了正面遮光损耗，可以应用于大规模生产。 Metal Wrap Through (MWT for short) solar cells transfer the electrons collected from the front of the battery to the back of the battery through the metal filled in the holes, without the need to design busbars on the front of the battery. Therefore, the surface of the MWT cell has a larger area to collect photons and convert them into electricity. The battery with this structure basically eliminates the shading loss of the busbar electrode, makes full use of the illuminated area, and improves the photoelectric conversion efficiency of the battery sheet; at the same time, it also reduces the difficulty of component packaging and simplifies the manufacturing process. At present, the efficiency of a single MWT cell can reach about 20%, and the efficiency of a module can reach 17%. Its main advantages lie in the realization of coplanar assembly and the reduction of front shading loss, which can be applied to large-scale production.
发明内容 Contents of the invention
本实用新型的目的是提供一种太阳能电池片正电极栅线结构。 The purpose of the utility model is to provide a solar cell positive electrode grid wire structure.
为达到上述目的，本实用新型采用的技术解决方案是：一种太阳能电池片正电极栅线结构，所述正电极栅线结构至少包含4个重复结构单元；所述的重复结构单元为正六边形结构，每个重复结构单元的中心处有一个节点；所述节点位置设有通孔，电池背面的正电极连接点通过通孔中的导电浆料与正面栅线的所述节点相连接；所述的正六边形重复结构单元栅线图中有若干个小等边三角形组成，形成分支栅线，分支栅线同一方向互相等间距平行。 In order to achieve the above purpose, the technical solution adopted by the utility model is: a positive electrode grid line structure of a solar battery sheet, the positive electrode grid line structure includes at least 4 repeating structural units; the repeating structural units are regular hexagonal Shaped structure, there is a node at the center of each repeating structural unit; The position of the node is provided with a through hole, and the positive electrode connection point on the back of the battery is connected to the node of the front grid line through the conductive paste in the through hole; The regular hexagonal repeating structural unit grid pattern is composed of several small equilateral triangles to form branch grid lines, and the branch grid lines are parallel to each other at equal intervals in the same direction.
本实用新型的有益效果是提高电池片的光电转换效率，降低生产成本。 The beneficial effect of the utility model is to improve the photoelectric conversion efficiency of the battery sheet and reduce the production cost.
附图说明 Description of drawings
图1 本实用新型提供的一种太阳能电池片正电极栅线结构图。 Fig. 1 is a structural diagram of the positive electrode grid line of a solar cell provided by the utility model.
具体实施方式 Detailed ways
下面结合附图对本实用新型的技术方案作进一步详细说明。 Below in conjunction with accompanying drawing, the technical scheme of the utility model is described in further detail.
在本具体实施方式中，如附图1所示，一种太阳能电池片正电极栅线结构，所述正电极栅线结构由20个重复结构单元组成；；所述的重复结构单元为正六边形结构，每个重复结构单元的中心处有一个节点；所述节点位置设有通孔，电池背面的正电极连接点通过通孔中的导电浆料与正面栅线的所述节点相连接；所述的正六边形重复结构单元栅线图中有若干个小等边三角形组成，形成分支栅线，分支栅线同一方向互相等间距平行。 In this specific embodiment, as shown in Figure 1, a positive electrode grid line structure of a solar cell, the positive electrode grid line structure is composed of 20 repeating structural units; the repeating structural units are regular hexagonal Shaped structure, there is a node at the center of each repeating structural unit; The position of the node is provided with a through hole, and the positive electrode connection point on the back of the battery is connected to the node of the front grid line through the conductive paste in the through hole; The regular hexagonal repeating structural unit grid pattern is composed of several small equilateral triangles to form branch grid lines, and the branch grid lines are parallel to each other at equal intervals in the same direction.
其中，所述的重复结构单元正六边形的六条边的宽度为80um；所述的重复结构单元中的等边三角形形成的分支栅线的宽度为50um。 Wherein, the width of the six sides of the regular hexagon of the repeating structural unit is 80um; the width of the branch gate lines formed by the equilateral triangles in the repeating structural unit is 50um.
通过实验证明，本实用新型提供的一种太阳能电池片正电极栅线结构的技术方案，制备的太阳能电池片的光电转换效率高，生产成本低。 It is proved by experiments that the utility model provides a technical scheme of the positive electrode grid line structure of the solar cell, and the solar cell prepared has high photoelectric conversion efficiency and low production cost.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420803141.2U CN204289473U (en) | 2014-12-18 | 2014-12-18 | A kind of solar battery sheet grid line structure of positive electrode |
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| CN201420803141.2U CN204289473U (en) | 2014-12-18 | 2014-12-18 | A kind of solar battery sheet grid line structure of positive electrode |
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| CN204289473U true CN204289473U (en) | 2015-04-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465806A (en) * | 2014-12-18 | 2015-03-25 | 浙江鸿禧能源股份有限公司 | Positive electrode grid line structure of solar battery piece |
| CN109545870A (en) * | 2018-11-20 | 2019-03-29 | 浙江晶盛机电股份有限公司 | A kind of regular hexagon MWT solar battery sheet |
-
2014
- 2014-12-18 CN CN201420803141.2U patent/CN204289473U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465806A (en) * | 2014-12-18 | 2015-03-25 | 浙江鸿禧能源股份有限公司 | Positive electrode grid line structure of solar battery piece |
| CN109545870A (en) * | 2018-11-20 | 2019-03-29 | 浙江晶盛机电股份有限公司 | A kind of regular hexagon MWT solar battery sheet |
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Granted publication date: 20150422 |
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