CN109994556A - A photovoltaic cell string and photovoltaic cell assembly - Google Patents
A photovoltaic cell string and photovoltaic cell assembly Download PDFInfo
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- CN109994556A CN109994556A CN201910313270.0A CN201910313270A CN109994556A CN 109994556 A CN109994556 A CN 109994556A CN 201910313270 A CN201910313270 A CN 201910313270A CN 109994556 A CN109994556 A CN 109994556A
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- 238000003466 welding Methods 0.000 claims abstract description 42
- 239000010410 layer Substances 0.000 claims description 37
- 239000000084 colloidal system Substances 0.000 claims description 26
- 239000003522 acrylic cement Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 238000003475 lamination Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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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
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
- H10F77/206—Electrodes for devices having potential barriers
- H10F77/211—Electrodes for devices having potential barriers for photovoltaic cells
- H10F77/219—Arrangements for electrodes of back-contact photovoltaic cells
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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
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
- H10F77/206—Electrodes for devices having potential barriers
- H10F77/211—Electrodes for devices having potential barriers for photovoltaic cells
- H10F77/215—Geometries of grid contacts
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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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- 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
- H10F19/908—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells for back-contact photovoltaic cells
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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
本发明提供一种光伏电池串和光伏电池组件，光伏电池串包括：多个电池片，每个电池片的正面设有正面主栅线且背面设有背面主栅线，相邻两个电池片的边缘呈叠瓦式连接，且相邻两个电池片中的一个电池片的正面主栅线与另一个电池片的背面主栅线通过焊带连接，在相邻两个电池片的叠合处位于焊带的至少一侧设有支撑部。根据本发明的光伏电池串，相邻两个电池片的边缘呈叠瓦式连接，相邻两个电池片中一个电池片的正面主栅线与另一个电池片的背面主栅线通过焊带连接，通过在相邻两个电池片的叠合处位于焊带的至少一侧设有支撑部能够增加叠合处的接触面积，减小接触应力，减少电池串在层压或搬运过程中的破碎，提高电池串的可靠性。
The invention provides a photovoltaic cell string and a photovoltaic cell assembly. The photovoltaic cell string includes a plurality of cells, each cell is provided with a front busbar on the front and a back busbar on the back, and two adjacent cells are provided with a front busbar. The edges of the battery are connected in a shingled manner, and the front busbar of one of the two adjacent cells is connected to the back busbar of the other cell by a welding tape. A support portion is provided on at least one side of the welding strip. According to the photovoltaic cell string of the present invention, the edges of two adjacent cells are connected in a shingled manner, and the front busbar of one cell and the back busbar of the other cell of the two adjacent cells pass through the welding tape For connection, by providing a support part on at least one side of the welding tape at the overlapping position of two adjacent battery sheets, the contact area of the overlapping position can be increased, the contact stress can be reduced, and the battery string during the lamination or handling process can be reduced. broken, improving the reliability of the battery string.
Description
技术领域technical field
本发明涉及光伏制造领域，特别涉及一种光伏电池串和光伏电池组件。The invention relates to the field of photovoltaic manufacturing, in particular to a photovoltaic cell string and a photovoltaic cell assembly.
背景技术Background technique
在太阳能电池行业，叠瓦组件是常见的一种组件，叠瓦组件中电池片排布密度大，叠瓦组件功率较高，但是现有的叠瓦组件常通过导电胶或焊带进行连接，电池片重叠区不完全接触，接触面小，存在接触应力大的问题，电池串在层压或搬运过程中易破碎，导致电池串的可靠性降低。In the solar cell industry, the shingled module is a common type of module. In the shingled module, the cell arrangement density is high and the power of the shingled module is high. However, the existing shingled modules are often connected by conductive adhesives or welding tapes. The overlapping area of the battery sheets is not completely in contact, the contact surface is small, and there is a problem of high contact stress, and the battery string is easily broken during lamination or handling, which reduces the reliability of the battery string.
发明内容SUMMARY OF THE INVENTION
本发明提供一种光伏电池串和光伏电池组件，用以解决电池串中电池片重叠区接触应力大，电池串在层压或搬运过程中易破碎，可靠性低的问题。The invention provides a photovoltaic cell string and a photovoltaic cell assembly, which are used to solve the problems of high contact stress in the overlapping area of the cell sheets in the cell string, easy breakage of the cell string during lamination or handling, and low reliability.
为解决上述技术问题，本发明采用以下技术方案：In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:
根据本发明第一方面实施例的光伏电池串，包括：The photovoltaic cell string according to the embodiment of the first aspect of the present invention includes:
多个电池片，每个所述电池片的正面设有正面主栅线且背面设有背面主栅线，相邻两个所述电池片的边缘呈叠瓦式连接，且相邻两个所述电池片中的一个所述电池片的正面主栅线与另一个所述电池片的背面主栅线通过焊带连接，在相邻两个所述电池片的叠合处位于所述焊带的至少一侧设有支撑部。A plurality of battery sheets, the front side of each battery sheet is provided with a front busbar and the back side is provided with a back busbar, the edges of two adjacent battery sheets are connected in a shingled manner, and two adjacent battery sheets are connected. The front busbar of one of the battery sheets and the back busbar of the other battery sheet are connected by a welding tape, and the welding tape is located at the overlapping place of the two adjacent battery sheets. At least one side is provided with a support portion.
进一步地，所述电池片的正面主栅线和所述电池片的背面主栅线上分别设有焊盘，相邻两个所述电池片中一个所述电池片的正面主栅线上的焊盘与另一个所述电池片的背面主栅线上的焊盘分别和对应的所述焊带连接。Further, pads are respectively provided on the front busbar of the battery sheet and the back busbar of the battery sheet, and the front busbar of one of the adjacent two battery sheets is on the front busbar of the battery sheet. The pads are respectively connected with the pads on the back busbar line of the other battery sheet and the corresponding soldering strips.
进一步地，每个所述电池片上的所述焊盘包括多列，每列中包括多个所述焊盘且多个所述焊盘沿所述焊带的长度方向间隔开分布，每列所述焊盘分别与对应的所述焊带连接。Further, the pads on each of the battery sheets include a plurality of columns, each column includes a plurality of the pads, and the plurality of the pads are spaced and distributed along the length direction of the welding tape, and each column includes a plurality of the pads. The solder pads are respectively connected with the corresponding solder ribbons.
进一步地，每根所述焊带的两侧分别设有所述支撑部。Further, the support portions are respectively provided on both sides of each of the welding strips.
进一步地，每根所述焊带的两侧分别止抵与其相邻的两个所述支撑部。Further, two sides of each of the welding strips are respectively abutted against the two adjacent supporting parts.
进一步地，所述支撑部为胶体层。Further, the support portion is a colloid layer.
进一步地，所述胶体层为非导电层。Further, the colloid layer is a non-conductive layer.
进一步地，所述胶体层为弹性层。Further, the colloid layer is an elastic layer.
进一步地，所述胶体层为有机硅层、环氧树脂层或丙烯酸胶层。Further, the colloid layer is a silicone layer, an epoxy resin layer or an acrylic adhesive layer.
根据本发明第二方面实施例的光伏电池组件，包括上述实施例的光伏电池串。A photovoltaic cell assembly according to an embodiment of the second aspect of the present invention includes the photovoltaic cell string of the above-mentioned embodiments.
本发明的上述技术方案至少具有如下有益效果：The above-mentioned technical scheme of the present invention has at least the following beneficial effects:
根据本发明的光伏电池串，相邻两个电池片的边缘呈叠瓦式连接，相邻两个电池片中一个电池片的正面主栅线与另一个电池片的背面主栅线通过焊带连接，通过在相邻两个电池片的叠合处位于焊带的至少一侧设有支撑部能够增加叠合处的接触面积，减小接触应力，减少电池串在层压或搬运过程中的破碎，提高电池串的可靠性。According to the photovoltaic cell string of the present invention, the edges of two adjacent cells are connected in a shingled manner, and the front busbar of one cell and the back busbar of the other cell of the two adjacent cells pass through the welding tape For connection, by providing a support part on at least one side of the welding tape at the overlapping position of two adjacent battery sheets, the contact area of the overlapping position can be increased, the contact stress can be reduced, and the battery string during the lamination or handling process can be reduced. broken, improving the reliability of the battery string.
附图说明Description of drawings
图1为本发明实施例的光伏电池串中支撑部在电池片上的示意图；1 is a schematic diagram of a support portion on a cell sheet in a photovoltaic cell string according to an embodiment of the present invention;
图2为本发明实施例的光伏电池串中支撑部与焊带的配合示意图；FIG. 2 is a schematic diagram of the cooperation between a support portion and a welding ribbon in a photovoltaic cell string according to an embodiment of the present invention;
图3为本发明实施例的光伏电池串的一个结构示意图；3 is a schematic structural diagram of a photovoltaic cell string according to an embodiment of the present invention;
图4为本发明实施例的光伏电池串的一个侧视图。4 is a side view of a photovoltaic cell string according to an embodiment of the present invention.
附图标记：Reference number:
电池片10；battery slice 10;
焊带20；Ribbon 20;
支撑部30；support part 30;
焊盘40。Pad 40 .
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
下面首先结合附图具体描述根据本发明实施例的光伏电池串。The photovoltaic cell strings according to the embodiments of the present invention are first described in detail below with reference to the accompanying drawings.
如图1至图4所示，根据本发明实施例的光伏电池串包括多个电池片10，每个电池片10的正面设有正面主栅线且背面设有背面主栅线，相邻两个电池片10的边缘呈叠瓦式连接，且相邻两个电池片10中的一个电池片10的正面主栅线与另一个电池片10的背面主栅线通过焊带20连接，在相邻两个电池片10的叠合处位于焊带20的至少一侧设有支撑部30。As shown in FIG. 1 to FIG. 4 , a photovoltaic cell string according to an embodiment of the present invention includes a plurality of cell sheets 10 , each cell sheet 10 is provided with a front busbar on the front and a back busbar on the back, and two adjacent The edges of each cell 10 are connected in a shingled manner, and the front busbar of one cell 10 and the back busbar of the other cell 10 are connected by the welding tape 20 in the adjacent two cells 10. A support portion 30 is provided on at least one side of the welding tape 20 at the overlapping portion of the adjacent two battery sheets 10 .
也就是说，光伏电池串主要由多个电池片10构成，其中，电池片可以通过切割大的电池片来得到，可以切割大的电池片的1/5或1/6片来作为电池片10，每个电池片10的正面设有正面主栅线，且每个电池片10的背面设有背面主栅线，相邻两个电池片10的边缘呈叠瓦式连接，相邻两个电池片10中的一个电池片10的正面主栅线与另一个电池片10的背面主栅线可以通过焊带20连接，通过焊带20可以收集电流，焊带20可以为圆焊带、三角焊带、扁平焊带或异形焊带，通过焊带20将两个电池片20连接在一起，能够保证连接的稳定牢固。That is to say, the photovoltaic cell string is mainly composed of a plurality of cell sheets 10 , wherein the cell sheets can be obtained by cutting large cell sheets, and 1/5 or 1/6 of the large cell sheets can be cut as the cell sheets 10 , the front side of each cell 10 is provided with a front busbar, and the back of each cell 10 is provided with a back busbar, the edges of two adjacent cells 10 are connected in a shingled manner, and two adjacent cells The front busbars of one cell 10 in the sheet 10 and the back busbars of the other cell 10 can be connected by a welding tape 20, through which the current can be collected, and the welding tape 20 can be a round welding tape, a triangle welding The two battery sheets 20 are connected together through the welding strip 20, which can ensure the stability and firmness of the connection.
在相邻两个电池片10的叠合处位于焊带20的至少一侧可以设有支撑部30，支撑部30位于相邻两个电池片10之间的叠合区，在焊带的长度方向上，支撑部30可以延伸出叠合区，也可小于叠合区，可以在焊带20的一侧设有支撑部30，也可以在焊带20的两侧设有支撑部30。也即是，可以在相邻两个电池片10的叠合处未设置焊带20的位置设有支撑部30，支撑部30分别止抵两个电池片10的叠合位置，未设置支撑部30时，两个电池片10的叠合位置只有焊带位置接触，设置支撑部30后，两个电池片10的叠合位置还有支撑部位置接触，可以将两个电池片叠合位置由线接触变成面接触，通过支撑部30增大两个电池片10叠合处的接触面积，减小接触应力，减少电池串在层压或搬运过程中的破碎，减少光伏电池串的修复，提高电池串的可靠性。另外，本发明的光伏电池串在组装时与现有串焊设备兼容性大，不需要大的投资。A support portion 30 may be provided on at least one side of the welding strip 20 at the overlapping position of two adjacent battery sheets 10, and the support portion 30 is located in the overlapping area between the two adjacent battery sheets 10, and the length of the welding strip is In the direction, the support portion 30 may extend beyond the overlapping area, or may be smaller than the overlapping area. That is, the support portion 30 may be provided at the position where the welding tape 20 is not provided at the overlapping position of the two adjacent cell sheets 10 , the support portion 30 respectively abuts against the overlapping position of the two cell sheets 10 , and no support portion is provided. At 30 o’clock, the overlapping position of the two battery slices 10 is only in contact with the position of the ribbon. After the support portion 30 is provided, the overlapping position of the two battery slices 10 is also in contact with the position of the support portion. The overlapping position of the two battery slices can be changed from The line contact becomes the surface contact, the contact area at the superposition of the two cell sheets 10 is increased through the support portion 30, the contact stress is reduced, the breakage of the cell string during the lamination or handling process is reduced, and the repair of the photovoltaic cell string is reduced, Improve the reliability of battery strings. In addition, the photovoltaic cell string of the present invention has great compatibility with existing string welding equipment during assembly, and does not require large investment.
在本发明的一些实施例中，如图1至图3所示，电池片10的正面主栅线和电池片10的背面主栅线上可以分别设有焊盘20，相邻两个电池片10中一个电池片10的正面主栅线上的焊盘20与另一个电池片10的背面主栅线上的焊盘20可以分别和对应的焊带20连接，在电池片10上的主栅线上设置焊盘20便于焊带的连接。In some embodiments of the present invention, as shown in FIG. 1 to FIG. 3 , pads 20 may be respectively provided on the front busbar of the battery sheet 10 and the back busbar of the battery sheet 10 , and two adjacent battery sheets may be provided with pads 20 respectively. In 10, the pads 20 on the front busbars of one cell 10 and the pads 20 on the back busbars of the other cell 10 can be respectively connected to the corresponding welding tapes 20. The busbars on the cell 10 Pads 20 are provided on the wire to facilitate the connection of the solder ribbons.
在本发明的另一些实施例中，如图1至图3所示，每个电池片10上的焊盘40可以包括多列，每列中可以包括多个焊盘40且多个焊盘40可以沿焊带20的长度方向间隔开分布，每列焊盘40分别与对应的焊带20连接，每列焊盘40对应一根焊带20，便于焊带的连接，提高焊带连接的稳定性和牢固性。In other embodiments of the present invention, as shown in FIGS. 1 to 3 , the pads 40 on each battery sheet 10 may include multiple columns, and each column may include multiple pads 40 and multiple pads 40 It can be spaced apart along the length direction of the welding tape 20, each column of pads 40 is connected to the corresponding welding tape 20, and each column of pads 40 corresponds to one welding tape 20, which is convenient for the connection of the welding tape and improves the stability of the welding tape connection. sturdiness and firmness.
根据本发明的一些实施例，如图2和图3所示，每根焊带20的两侧可以分别设有支撑部30，增大电池片10叠合位置的接触面积，减小接触应力，减少电池串在层压或搬运过程中的破碎。According to some embodiments of the present invention, as shown in FIG. 2 and FIG. 3 , support portions 30 may be respectively provided on both sides of each ribbon 20 to increase the contact area of the overlapping position of the battery sheets 10 and reduce the contact stress. Reduces string breakage during lamination or handling.
优选地，每根焊带20的两侧可以分别止抵与其相邻的两个支撑部30，增加电池片10叠合位置的接触面积，焊带20与相邻的两个支撑部20相接处能够使得整个叠合位置都处于接触状态，防止因局部应力过大导致电池片破碎。Preferably, the two sides of each welding strip 20 can respectively stop against the two adjacent supporting parts 30 to increase the contact area of the overlapping position of the battery sheets 10 , and the welding strip 20 is in contact with the two adjacent supporting parts 20 . It can make the whole superimposed position in contact state to prevent the battery sheet from being broken due to excessive local stress.
在本发明的一些实施例中，支撑部30可以为胶体层，胶体层可以在电池片上通过丝网印刷或点胶来形成，胶体层的形状可以为矩形、椭圆或圆形。可选地，胶体层可以为有机硅层、环氧树脂层或丙烯酸胶层，还可以为其他的树脂层或橡胶层。优选地，胶体层可以为弹性层，通过弹性层可以缓冲电池片叠合位置的冲击或挤压，减小接触应力，减小电池片的破碎。In some embodiments of the present invention, the support portion 30 may be a colloidal layer, and the colloidal layer may be formed on the battery sheet by screen printing or dispensing, and the shape of the colloidal layer may be a rectangle, an ellipse or a circle. Optionally, the colloid layer can be a silicone layer, an epoxy resin layer or an acrylic adhesive layer, and can also be other resin layers or rubber layers. Preferably, the colloid layer can be an elastic layer, and the elastic layer can buffer the impact or extrusion of the overlapping position of the battery sheets, reduce the contact stress, and reduce the breakage of the battery sheets.
当支撑部30为胶体层时，在组装光伏电池串过程中，可以在电池片10的边缘相应的位置涂抹胶体以形成胶体层，胶体层可以具有弹性和韧性，可以分解叠片后焊带20与电池片10边缘硬接触所产生的应力，使得叠合位置由线接触转换为面接触，可减少电池片破碎；然后将焊带20与电池片10进行串焊，此后，可以对涂抹的胶体进行预固化，然后组件叠层，涂抹的胶体也可以不做预固化，直接叠层，在叠层过程中实现胶体固化，具体工艺可以根据胶体的固化性质确定。在电池片10的边缘进行胶体涂抹时可以预留出焊带通过的间隔位置，然后可以对胶体进行预固化，胶体预固化后，电池片10可以堆叠在一起存放，收纳后可以直接放置于串焊机的料盒中，现有的串焊设备不需要做任何变更，胶体也可在层压过程中实现二次固化，实现对电池片10重叠区域的粘接。When the support part 30 is a colloid layer, during the process of assembling the photovoltaic cell string, colloid can be applied to the corresponding position of the edge of the cell 10 to form a colloid layer. The colloid layer can have elasticity and toughness, and can decompose the welding tape 20 after lamination. The stress generated by the hard contact with the edge of the battery sheet 10 changes the overlapping position from line contact to surface contact, which can reduce the breakage of the battery sheet; then the welding tape 20 and the battery sheet 10 are serially welded, and then the applied colloid can be applied. Pre-curing is carried out, and then the components are laminated. The applied colloid can also be directly laminated without pre-curing, and the colloid is cured during the lamination process. The specific process can be determined according to the curing properties of the colloid. When the edge of the battery sheet 10 is smeared with colloid, an interval position for the welding tape to pass through can be reserved, and then the colloid can be pre-cured. After the colloid is pre-cured, the battery slices 10 can be stacked together for storage, and can be directly placed on the string after storage. In the material box of the welding machine, the existing string welding equipment does not need to be changed, and the colloid can also be cured twice during the lamination process to realize the bonding of the overlapping areas of the battery sheets 10 .
在本发明的另一些实施例中，胶体层可以为非导电层，胶体层不具有导电性，不需要使用含银颗粒的胶体，成本低，即使在形成胶体层时胶体出现外溢，也无短路问题，提高电池串的可靠性。In other embodiments of the present invention, the colloid layer may be a non-conductive layer, the colloid layer does not have electrical conductivity, does not need to use colloid containing silver particles, the cost is low, and there is no short circuit even if the colloid overflows when the colloid layer is formed problem, improve the reliability of the battery string.
本发明还提供一种光伏电池组件，包括上述实施例中的光伏电池串，具有上述实施例中的光伏电池串的光伏电池组件能够减小叠合位置的接触应力，减少电池片的破碎，提高组件的可靠性。The present invention also provides a photovoltaic cell assembly, including the photovoltaic cell string in the above-mentioned embodiment, the photovoltaic cell assembly with the photovoltaic cell string in the above-mentioned embodiment can reduce the contact stress at the overlapping position, reduce the breakage of the cell sheet, and improve the component reliability.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.
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