CN209981238U - Solar cell module - Google Patents
Solar cell module Download PDFInfo
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- CN209981238U CN209981238U CN201920248466.1U CN201920248466U CN209981238U CN 209981238 U CN209981238 U CN 209981238U CN 201920248466 U CN201920248466 U CN 201920248466U CN 209981238 U CN209981238 U CN 209981238U
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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
The application discloses a solar cell module, including rectangular frame, the first solar wafer group that has a plurality of series connections is arranged in the frame, first solar wafer group is regular hexagon, first solar wafer group includes at least one first solar wafer, still include the second solar wafer group of a plurality of series connections, the second solar wafer group is used for filling the clearance between first solar wafer group and the frame, the second solar wafer group includes at least two second solar wafers, the parallelly connected second solar wafer group that constitutes the second solar wafer group in the second solar wafer group, the area of single first solar wafer group equals with the area of single second solar wafer group, first solar wafer group and second solar wafer group establish ties, can improve the utilization ratio of silicon rod raw materials, reduce the waste of raw materials, manufacturing cost has been reduced.
Description
Technical Field
The utility model relates to a photovoltaic field, concretely relates to solar cell field especially relates to a solar cell module.
Background
Solar cells need to be cost-effective and efficient continuously to enhance their competitive advantage as alternative energy sources. The cost of the silicon wafer accounts for about 30% of the cost of all raw materials of the solar cell, the utilization rate of silicon materials of the silicon rod is improved, and the cost of the solar cell can be effectively reduced.
At present, a mainstream silicon wafer (quadrilateral/nearly square) is formed by cutting a cylindrical silicon rod (prepared by a czochralski method), more waste materials are generated due to the fact that corners cannot be fully utilized, the area of a prepared battery piece is small (the loss effective area is large), the power of a single piece is low, and the power of a component formed by packaging the same number of battery pieces is also low.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a solar cell module with improved material utilization and module power.
First aspect, the utility model discloses a solar module, including the rectangle frame, the first solar wafer group that has a plurality of series connections is arranged in the frame, first solar wafer group is regular hexagon, first solar wafer group includes an at least first solar wafer, still include the second solar wafer group of a plurality of series connections, second solar wafer group is used for filling the clearance between first solar wafer group and the frame, second solar wafer group includes two piece at least second solar wafers, the parallelly connected second solar wafer group that constitutes of second solar wafer in the second solar wafer group, the photic area of single first solar wafer group equals with the photic area of single second solar wafer group, first solar wafer group and second solar wafer group establish ties.
According to the technical scheme provided by the embodiment of the application, the first solar cell set is set to be in the regular hexagon shape, in addition, the light receiving area of the second solar cell set is equal to the light receiving area of the first solar cell set, the first solar cell set and the second solar cell set can be made by the regular hexagon silicon wafers cut by the cylindrical silicon rods, compared with the traditional quadrangle or near square shape, the utilization rate of silicon rod raw materials can be improved, the waste of the raw materials is reduced, the production cost is reduced, meanwhile, the light receiving areas of the single first solar cell set and the single second solar cell set can be improved, the power generation efficiency of the single first solar cell set and the single second solar cell set is improved, and the problems of low raw material utilization rate and low single power generation efficiency in the existing solar cell component processing process can be solved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a back contact solar cell of a solar cell module according to an embodiment of the present invention, which is an MWT cell.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 14, the solar cell module of the present invention includes a rectangular frame 100, a plurality of first solar cell sets 200 connected in series are arranged in the frame 100, the first solar cell sets 200 are regular hexagons, the first solar cell sets 200 include at least one first solar cell 210, and further include a plurality of second solar cell sets 300 connected in series, the second solar cell sets 300 are used for filling a gap between the first solar cell sets 200 and the frame 100, the second solar cell sets 300 include at least two second solar cell 310, the second solar cell 310 in the second solar cell sets 300 are connected in parallel to form the second solar cell sets 300, a light receiving area of a single first solar cell set 200 is equal to a light receiving area of a single second solar cell set 300, and the first solar cell sets 200 are connected in series with the second solar cell sets 300.
The embodiment of the utility model provides an in, arrange the first solar wafer group that has a plurality of series connections in the rectangle frame, first solar wafer group is regular hexagon, and first solar wafer group includes at least one first solar wafer. Specifically, the first solar cell set may include a first solar cell, and the first solar cell is a monolithic regular hexagonal back contact solar cell; the first solar cell piece group can also comprise two first solar cell pieces, the two first solar cell pieces are connected in parallel to form the first solar cell piece group, the two first solar cell pieces are spliced to form the regular hexagon first solar cell piece group, and the first solar cell piece is a half regular hexagon back contact solar cell piece; the first solar cell group also can comprise three first solar cells, the three first solar cells are connected in parallel to form the first solar cell group, the three first solar cells are spliced to form the regular-hexagon first solar cell group, and the first solar cell is one-third of regular-hexagon back-contact solar cells; the first solar cell group can also comprise four first solar cells which are connected in parallel to form a first solar cell group, the four first solar cells are spliced to form a regular hexagonal first solar cell group, and the first solar cells are quarter regular hexagonal back-contact solar cells; the first solar cell set can also comprise six first solar cells which are connected in parallel to form a first solar cell set, the six first solar cells are spliced to form a regular hexagonal first solar cell set, and the first solar cells are one-sixth regular hexagonal back-contact solar cells; the first solar cell sheet group can also comprise twelve first solar cell sheets, the twelve first solar cell sheets are connected in parallel to form the first solar cell sheet group, the twelve first solar cell sheets are spliced to form the regular hexagon first solar cell sheet group, and the first solar cell sheet is a twelve-part regular hexagon back contact solar cell sheet.
The second solar cell set comprises at least two second solar cell pieces, the second solar cell pieces are any one of a half regular hexagon back contact solar cell piece, a third regular hexagon back contact solar cell piece, a quarter regular hexagon back contact solar cell piece, a sixth regular hexagon back contact solar cell piece and a twelfth regular hexagon back contact solar cell piece, the second solar cell pieces can fill up the gap between the first solar cell set and the frame, namely, the first solar cell set and the second solar cell set can be spliced into a cuboid, in addition, the light receiving area of the single second solar cell set is equal to that of the single first solar cell set, namely, the current corresponding to the maximum power point of the first solar cell set is ensured to be the same as the current corresponding to the maximum power point of the second solar cell set, the first solar cell group and the second solar cell group which are connected in series can be prevented from generating a water barrel effect, and the power generation efficiency of the solar cell module is improved.
First solar wafer group and second solar wafer group can the amalgamation become a cuboid for fill up solar wafer in the rectangle frame, and, first solar wafer and second solar wafer need not set up the chamfer, the waste that is located the blank region in chamfer region when having avoided the nearly square battery piece of traditional chamfer to lay, can improve the photic area of first solar wafer group and second solar wafer group, the generating efficiency of single first solar wafer group and single second solar wafer group has been improved, solar module's generating efficiency has been improved.
The arrangement mode of the first solar cell sets can be honeycomb arrangement, can also be arranged in sequence along the long edges or the wide edges of the rectangular frame, can also be arranged in sequence along any straight line, can also be arranged at intervals of the adjacent first solar cell sets, and can also be irregularly arranged in a mixed mode, wherein the second solar cell sets are arranged between the adjacent first solar cell sets. The protection range of the application is that the first solar cell set is a regular hexagon, the second solar cell set can fill the gap between the first solar cell set and the frame, the first solar cell set is connected with the second solar cell set in series, and the light receiving areas of the single first solar cell set and the single second solar cell set are equal.
Further, the first solar cell 210 is a regular hexagonal back contact solar cell,
the second solar cell 310 is any one of a half regular hexagon back contact solar cell, a third regular hexagon back contact solar cell, a fourth regular hexagon back contact solar cell, a sixth regular hexagon back contact solar cell, and a twelfth regular hexagon back contact solar cell.
In the embodiment of the present invention, the first solar cell is a regular hexagon back contact solar cell, the second solar cell is any one of a half regular hexagon back contact solar cell, a third regular hexagon back contact solar cell, a quarter regular hexagon back contact solar cell, a sixth regular hexagon back contact solar cell, and a twelfth regular hexagon back contact solar cell, the second solar cell in the second solar cell is connected in parallel to form a second solar cell set, and then connected in series with the first solar cell, the second solar cell can fill up the gap between the first solar cell set and the frame, that is, the first solar cell set and the second solar cell set can be combined to form a cuboid, and the light receiving area of the single second solar cell set is equal to that of the single first solar cell set, that is, the current corresponding to the maximum power point of the first solar cell set is ensured to be the same as the current corresponding to the maximum power point of the second solar cell set, so that the barrel effect generated by the first solar cell set and the second solar cell set which are connected in series can be avoided, and the power generation efficiency of the solar cell assembly is improved.
Referring to fig. 1 and 2, the first solar cell is a regular hexagonal back contact solar cell, the second solar cell is a half-hexagon back contact solar cell, and two second solar cells are connected in parallel to form a second solar cell group.
Referring to fig. 3, the first solar cell is a regular hexagonal back contact solar cell, part of the second solar cell is a half regular hexagonal back contact solar cell, and part of the second solar cell is a quarter regular hexagonal back contact solar cell, two half regular hexagonal back contact solar cells can be connected in parallel to form a second solar cell, and one half regular hexagonal back contact solar cell and two quarter regular hexagonal back contact solar cells can be connected in parallel to form a second solar cell.
Referring to fig. 4 to 7, the first solar cell is a half-hexagon back-contact solar cell, two first solar cells may be connected in parallel to form a first solar cell set, the second solar cell is a half-hexagon back-contact solar cell, two second solar cells may be connected in parallel to form a second solar cell set, and the first solar cell set and the second solar cell set are connected in series. Of course, when the light receiving areas of the single first solar cell and the single second solar cell are equal, the first solar cell and the second solar cell can be directly connected in series.
Referring to fig. 8-10, the first solar cell is a one-third regular-hexagon back-contact solar cell, and three first solar cells are connected in parallel to form a first solar cell group. The solar cell comprises a first solar cell piece, a second solar cell piece, a first hexagonal back contact solar cell piece, a second solar cell piece, a third regular hexagonal back contact solar cell piece, a fourth regular hexagonal back contact solar cell piece, a sixth regular hexagonal back contact solar cell piece, a twelfth regular hexagonal back contact solar cell piece, four fourth regular hexagonal back contact solar cell pieces can be connected in parallel to form a second solar cell piece set, two third regular hexagonal back contact solar cell pieces and two sixth regular hexagonal back contact solar cell pieces can be connected in parallel to form a second solar cell piece set, and six sixth regular hexagonal back contact solar cell pieces can be connected in parallel to form a second solar cell piece set.
Referring to fig. 11 and 12, the first solar cell is a quarter-hexagon back-contact solar cell, and four first solar cells are connected in parallel to form a first solar cell group. The second solar cell is a quarter of regular hexagon back contact solar cell, and four second solar cells are connected in parallel to form a second solar cell group. Of course, when the light receiving areas of the single first solar cell and the single second solar cell are equal, the first solar cell and the second solar cell can be directly connected in series.
Referring to fig. 13, the first solar cell is a sixth regular hexagon back contact solar cell, and six first solar cells are connected in parallel to form a first solar cell group. The second solar cell is one-sixth regular hexagon back contact solar cell and one-twelfth regular hexagon back contact solar cell.
Referring to fig. 14, the first solar cell is a single regular hexagonal back contact solar cell, and the second solar cell is one-third regular hexagonal back contact solar cell, one-sixth regular hexagonal back contact solar cell, and one-twelfth regular hexagonal back contact solar cell.
Further, the first solar cell 210 is any one of a half regular hexagon back contact solar cell, a third regular hexagon back contact solar cell, a quarter regular hexagon back contact solar cell, a sixth regular hexagon back contact solar cell, and a twelfth regular hexagon back contact solar cell, the first solar cells in the first solar cell set are connected in parallel to form a first solar cell set,
the second solar cell 310 is any one of a half regular hexagon back contact solar cell, a third regular hexagon back contact solar cell, a fourth regular hexagon back contact solar cell, a sixth regular hexagon back contact solar cell, and a twelfth regular hexagon back contact solar cell.
In an embodiment of the present invention, the first solar cell sheet group may also include two first solar cell sheets, the two first solar cell sheets are connected in parallel to form a first solar cell sheet group, the two first solar cell sheets are spliced to form a regular hexagonal first solar cell sheet group, and the first solar cell sheet is a half regular hexagonal back contact solar cell sheet; the first solar cell group also can comprise three first solar cells, the three first solar cells are connected in parallel to form the first solar cell group, the three first solar cells are spliced to form the regular-hexagon first solar cell group, and the first solar cell is one-third of regular-hexagon back-contact solar cells; the first solar cell group can also comprise four first solar cells which are connected in parallel to form a first solar cell group, the four first solar cells are spliced to form a regular hexagonal first solar cell group, and the first solar cells are quarter regular hexagonal back-contact solar cells; the first solar cell set can also comprise six first solar cells which are connected in parallel to form a first solar cell set, the six first solar cells are spliced to form a regular hexagonal first solar cell set, and the first solar cells are one-sixth regular hexagonal back-contact solar cells; the first solar cell group may also include twelve first solar cells, twelve first solar cells are connected in parallel to form a first solar cell group, twelve first solar cells are combined to form a regular hexagonal first solar cell group, the first solar cell is a twelve-piece regular hexagonal back contact solar cell, of course, the first solar cell may also be a solar cell with different light receiving areas, for example, the first solar cell group may include two quarter-piece regular hexagonal back contact solar cells and one half-piece regular hexagonal back contact solar cells, two quarter-piece regular hexagonal back contact solar cells and one half-piece regular hexagonal back contact solar cells can be combined to form a regular hexagonal first solar cell group, as long as a plurality of first solar cells can be combined to form a regular hexagonal first solar cell group, the shape of the first solar cell sheet and the number of the first solar cell sheets are all within the protection scope of the present application.
The second solar cell is any one of a half regular hexagon back contact solar cell, a third regular hexagon back contact solar cell, a quarter regular hexagon back contact solar cell, a sixth regular hexagon back contact solar cell and a twelfth regular hexagon back contact solar cell, the second solar cell in the second solar cell is connected in parallel to form a second solar cell set, the second solar cell can fill up the gap between the first solar cell set and the frame, namely, the first solar cell set and the second solar cell set can be spliced into a cuboid, the light receiving area of the single second solar cell set is equal to that of the single first solar cell set, the first solar cell in the first solar cell set is connected in parallel to form the first solar cell set, and the second solar cell in the second solar cell set is connected in parallel to form the second solar cell set, the first solar cell set and the second solar cell set are connected in series, that is, the current corresponding to the maximum power point of the first solar cell set is ensured to be the same as the current corresponding to the maximum power point of the second solar cell set, so that the water barrel effect generated by the first solar cell set and the second solar cell set which are connected in series can be avoided, and the power generation efficiency of the solar cell assembly is improved.
Further, the adjacent first solar cell groups 200 are sequentially connected in series along the longitudinal direction or the width direction of the frame 100.
The utility model discloses an in the embodiment, adjacent first solar wafer group establishes ties in proper order along the long limit direction of frame, refers to fig. 5, 7, 9, 10, can establish ties adjacent first solar wafer group along the long limit direction of frame is reciprocal, can reduce solar module's the processing degree of difficulty, improves solar module's machining efficiency.
The adjacent first solar cell sets are sequentially connected in series along the wide side direction of the frame, and referring to fig. 2, 3 and 12, the adjacent first solar cell sets can be connected in series along the long side direction of the frame in a reciprocating manner, so that the processing difficulty of the solar cell module can be reduced, and the processing efficiency of the solar cell module can be improved.
If one side of each first solar cell group is parallel to the long side of the frame, the adjacent first solar cell groups can be connected in series along the width direction of the frame in a reciprocating manner; if the first solar cell sets have one side parallel to the wide side of the frame, the adjacent first solar cell sets can be connected in series along the long side direction of the frame in a reciprocating mode. The first solar cell sets are connected in series in sequence according to the horizontal rows or the vertical rows of the first solar cell sets, and after the first solar cell sets in one row or one column are connected in series, the last first solar cell set is connected with the adjacent first solar cell sets which are not connected until the series connection of all the first solar cell sets is completed.
Further, the adjacent second solar cell sheets 300 are connected in series.
The utility model discloses an in the embodiment, adjacent second solar wafer group establishes ties, can reduce solar module's the processing degree of difficulty, improves solar module's process velocity and efficiency.
Further, a plurality of first solar cell panels 200 are arranged in the frame 100 in a honeycomb shape.
The utility model discloses an in the embodiment, be the honeycomb and arrange in the frame and have a plurality of first solar wafer group, stable in structure is convenient for arrange and process first solar wafer group, has reduced the processing degree of difficulty.
Referring to fig. 15, further, the first solar cell set 200 and the second solar cell set 300 form a cell sheet layer 30, an insulating layer 40 is fixedly connected to the back surface of the cell sheet layer 30, a plurality of conductive metal foil circuits 50 are fixedly connected to a side of the insulating layer 40 opposite to the cell sheet layer 30, a gap is provided between adjacent conductive metal foil circuits 50, the first solar cell set 200 and the second solar cell set 300 are electrically connected through the conductive metal foil circuits 50, and a polymer back plate 70 is bonded to a side of the conductive metal foil circuits 50 opposite to the cell sheet layer 30 through an adhesive layer 60.
The embodiment of the utility model provides an in, the back fixedly connected with insulating layer of cell piece, in this application, the front of cell piece refers to solar cell's sensitive surface, and the sensitive surface refers to solar cell and just is the one side of sun, and the back of cell piece refers to solar cell's shady face, and the shady face refers to the one side of solar cell back to sun, at the back fixedly connected with insulating layer of cell piece, can avoid the insulating layer to influence the cell piece and carry out the daylighting, has guaranteed solar module's photoelectric conversion efficiency.
One side of the insulating layer, which is back to the battery sheet layer, is fixedly connected with a plurality of conductive metal foil circuits, and the conductive metal foil circuits are electrically connected with the electrodes of the battery sheet layer through the electric connector. Two different electrodes of two back-contact solar cells needing to be connected in series are electrically connected with the same conductive metal foil circuit, specifically, the positive electrode of one back-contact solar cell and the negative electrode of the other back-contact solar cell are electrically connected with the same conductive metal foil circuit, and the negative electrode of one back-contact solar cell and the positive electrode of the other back-contact solar cell are electrically connected with the same conductive metal foil circuit. Two same electrodes of two back-contact solar cells to be connected in parallel are electrically connected with the same conductive metal foil circuit, specifically, the positive electrode of one back-contact solar cell and the positive electrode of the other back-contact solar cell are electrically connected with the same conductive metal foil circuit, and the negative electrode of one back-contact solar cell and the negative electrode of the other back-contact solar cell are electrically connected with the same conductive metal foil circuit. The positive electrode and the negative electrode of the same back contact solar cell piece are respectively and electrically connected with the unconnected conductive metal foil circuits, and a gap is arranged between the adjacent conductive metal foil circuits, so that the short circuit of the solar cell piece is avoided. The back contact solar cell piece is connected without a welding strip welding form, so that the back contact solar cell piece is prevented from being bent and arched, and the breakage rate of the solar cell piece is reduced.
The solar cell is electrically connected through the conductive metal foil circuit, the electrodes of the solar cell are led out through the electric connector, then the solar cell is connected in series or in parallel through the conductive metal foil circuit, short circuit of the back contact solar cell is avoided, the insulating layer can prevent the electric connection of the adjacent electric connectors, the photoelectric conversion efficiency of the solar cell is improved, and the reliability of the back contact solar cell assembly is improved.
The polymer back plate is bonded on one side, back to the battery sheet layer, of the conductive metal foil circuit through the bonding layer, the conductive metal foil circuit and the polymer back plate are bonded and fixed through the bonding layer, the conductive metal foil circuit is conveniently fixed and patterned to form the conductive metal foil circuit, and machining efficiency and machining accuracy are improved.
The back contact solar cell sheet may be, but not limited to, an IBC solar cell, an MWT solar cell, an EWT solar cell. The light receiving surface of the back contact solar cell piece can be an electrodeless structure (adopting an IBC cell structure, including a main grid structure on the back surface and a main grid-free structure on the back surface) or a fine grid electrode structure (adopting an MWT cell structure). The back contact solar cell slice adopts an N-type silicon substrate or a P-type silicon substrate.
The material of the polymeric backsheet may be, but is not limited to, TPT, TPE, KPE, KPK, KPC or KPF. The polymer back sheet can also be made of an entirely new type of material, and can include a polymer multilayer structure in which several layers of an insulating material (e.g., PET or PP) are compounded with a binder layer or a fluoropolymer coating, and the thickness and cost can be greatly reduced, and the electrical insulation is excellent and the weather resistance can be ensured.
The conductive metal foil circuit is made of any one or combination of copper, silver, aluminum, nickel, magnesium, iron, titanium, molybdenum and tungsten, and the conductive metal foil circuit is made of any one or combination of copper, silver, aluminum, nickel, magnesium, iron, titanium, molybdenum and tungsten.
The electrical connector is a conductor, and the material of the electrical connector can be, but not limited to, conductive paste, solder paste, conductive ink, isotropic conductive paste, anisotropic conductive paste, bulk or cylindrical metal alloy. The electric connector can be formed by screen printing or dispensing, and the material of the electric connector can be, but not only, solder paste or conductive paste with flake silver powder as a conductive filling phase and based on epoxy resin and/or acrylic resin.
Further, a front packaging layer 20 is fixedly connected to one side of the battery sheet layer 30, which is opposite to the insulating layer 40, and a front cover plate 10 is fixedly connected to one side of the front packaging layer 20, which is opposite to the battery sheet layer 30.
In embodiments of the present invention, the material of the front encapsulation layer may be, but not exclusively, EVA (ethylene vinyl acetate), PVB (polyvinyl butyral), POE (thermoplastic and/or thermosetting polyolefins) or Ionomer (polyethylene-acetate ionomers). The material of the front packaging layer is EVA, and the lamination is carried out for 10 minutes at the temperature of 147 ℃ to obtain the front packaging layer. The front cover plate can be, but is not limited to, embossed tempered glass, and the thickness of the front cover plate is 3.2 mm.
Further, the insulating layer 40 is provided with a plurality of openings 42 at intervals, and the electrical connectors 41 pass through the openings 42.
The utility model discloses an in the embodiment, the insulating layer is provided with a plurality of openings with the interval, and the electric connector passes the opening, can guarantee that the electric connector is connected with the electrode electricity of conductive metal foil circuit and back of the body contact solar wafer respectively, avoids the insulating layer to obstruct the electric connector and is connected with the electrode electricity of conductive metal foil circuit and back of the body contact solar wafer respectively, has improved back of the body contact solar module's yields. Meanwhile, the processing difficulty of the back contact solar cell module can be reduced.
Further, the shape of the opening 42 is circular or square.
The utility model discloses an in the embodiment, open-ended shape is circular or square, and the processing of being convenient for perhaps forms the opening, reduces back of the body contact solar module's the processing degree of difficulty, has improved back of the body contact solar module's machining efficiency.
Further, the number of the openings 42 is 100-.
In the embodiment of the present invention, when the back contact solar cell is a main grid IBC cell, the number of the openings is 100 and 50000; when the back contact solar cell is an IBC cell without a main grid on the back surface, the number of the openings is 5000-; when the back contact solar cell is an MWT cell, the number of the openings is 100-10000.
Furthermore, the thickness of the insulating layer 40 is less than or equal to 500 microns, the thickness of the insulating layer is more than 0, and the thickness of the bonding layer is 10-500 microns.
In the embodiment of the present invention, the adhesive layer may be, but not only, an EVA adhesive film, a POE adhesive film or a PVB film, and the thickness of the adhesive layer is 10 to 500 micrometers. The thickness of the insulating layer is less than or equal to 500 micrometers, the thickness of the insulating layer is more than 0, and the insulating layer has certain thermal deformation resistance, so that the insulating layer has small deformation in the laminating process, the electrode of the back contact solar cell is conveniently aligned with the electric connector, the processing accuracy of the back contact solar cell module is improved, and the yield is improved. Meanwhile, the over-thickness of the insulating layer can be avoided, and the production and manufacturing cost is reduced.
Further, the thickness of the insulating layer 40 is 50 to 200 μm.
In the embodiment of the utility model, the thickness of insulating layer is 50-200 microns, and the insulating layer has certain thermal deformation resistance ability for the insulating layer warp less in the lamination process, and the electrode and the electric connector of back contact solar wafer of being convenient for aim at, have improved back contact solar module's processing accuracy, have improved the yields. Meanwhile, the over-thickness of the insulating layer can be avoided, and the production and manufacturing cost is reduced.
Further, the conductive metal foil circuit 50 is made of copper foil or aluminum foil, and the thickness of the conductive metal foil circuit 50 is 10-100 micrometers.
In the embodiment of the utility model, the material of conductive metal foil circuit is copper foil or aluminium foil, and the thickness of conductive metal foil circuit is 10-100 microns, and the conductive metal foil circuit can provide the low resistance current path to guaranteed that the conductive metal foil circuit can not be too thick, under the prerequisite of having guaranteed the electric conductive property of conductive metal foil circuit, avoided back of the body contact solar module's manufacturing cost too high.
Further, the conductive metal foil circuit 50 has a thickness of 10 to 500 μm.
In the embodiment of the utility model, the thickness of conductive metal foil circuit is 10-500 microns, and conductive metal foil circuit can provide the low resistance current path to guaranteed that conductive metal foil circuit can not be too thick, under the prerequisite of having guaranteed conductive property of conductive metal foil circuit, avoided back contact solar module's manufacturing cost too high.
Further, the conductive metal foil circuit 50 at the edge of the cell sheet 30 is exposed at the edge of the cell sheet 30.
The embodiment of the utility model provides an in, when the photic area of each back contact solar wafer is the same, only need to establish ties each back contact solar wafer, need not make the conductive metal foil circuit expose the wafer edge. When the light receiving area of each back contact solar cell is different, in order to avoid the barrel effect, the back contact solar cells with small areas need to be connected in parallel firstly, and then are connected in series with the back contact solar cells with large areas, a conductive metal foil circuit positioned at the edge of a cell layer can be exposed out of the edge of the cell layer, the part of the conductive metal foil circuit exposed out of the edge of the cell layer is used for designing a connecting circuit, circuit connection is conveniently carried out between the back contact solar cells with small areas, and the processing efficiency of the back contact solar cell assembly is improved.
Furthermore, the back-contact solar cell 31 is provided with an anode fine grid line, a cathode fine grid line, a p-type doped region and an n-type doped region, the anode fine grid line is in contact with the p-type doped region, the cathode fine grid line is in contact with the n-type doped region, the anode fine grid line and the cathode fine grid line are respectively electrically connected with the electric connector, the sum of the number of the anode fine grid lines and the number of the cathode fine grid lines on any back-contact solar cell 31 is 50-1000, and the number of the electric connectors electrically connected with any one of the anode fine grid lines or any one of the cathode fine grid lines is 1-100.
The embodiment of the utility model provides an in, when back contact solar wafer does not have the main grid IBC battery for the back, back contact solar wafer is provided with the thin grid line of positive pole, the thin grid line of negative pole, p type doping region and n type doping region, the thin grid line of positive pole and the contact of p type doping region, the thin grid line of negative pole and the regional contact of n type doping, the thin grid line of positive pole and the thin grid line of negative pole are connected with the electric connector electricity respectively, derive the electric current through the thin grid line of positive pole and the thin grid line of negative pole. The sum of the number of the positive electrode fine grid lines and the negative electrode fine grid lines on any back contact solar cell is 50-1000, and the number of the electric connectors electrically connected with any one positive electrode fine grid line or negative electrode fine grid line is 1-100.
Further, the back-contact solar cell 31 is provided with an anode fine grid line, a cathode fine grid line, a p-type doped region and an n-type doped region, the anode fine grid line is in contact with the p-type doped region, the cathode fine grid line is in contact with the n-type doped region, the anode fine grid line is electrically connected with an anode connecting electrode, the cathode fine grid line is electrically connected with a cathode connecting electrode, the anode connecting electrode and the cathode connecting electrode are respectively electrically connected with an electric connector, the sum of the number of the anode connecting electrodes and the number of the cathode connecting electrodes on any back-contact solar cell 31 is 2-100, and the number of the electric connectors electrically connected with any one anode connecting electrode or any one cathode connecting electrode is 1-100.
The utility model discloses an in the embodiment, when back contact solar wafer has main bars IBC battery for the back, back contact solar wafer is provided with the thin grid line of positive pole, the thin grid line of negative pole, p type doping region and n type doping region, the thin grid line of positive pole and the regional contact of p type doping, the thin grid line of negative pole and the regional contact of n type doping, the thin grid line of positive pole is connected with positive connecting electrode electricity, the thin grid line of negative pole is connected with negative connecting electrode electricity, positive connecting electrode and negative connecting electrode are connected with the electric connector electricity respectively, derive the electric current through positive connecting electrode and negative connecting electrode. The sum of the number of the positive electrode connecting electrodes and the number of the negative electrode connecting electrodes on any back contact solar cell piece is 2-100, and the number of the electric connectors electrically connected with any one positive electrode connecting electrode or any one negative electrode connecting electrode is 1-100.
Referring to fig. 16, further, the back-contact solar cell 31 is provided with a first electrode 32 and a second electrode 36, the first electrode 32 includes a fine gate electrode 33, a through-hole electrode 34 and a first connection electrode 35, the fine gate electrode 33 and the first connection electrode 35 are respectively electrically connected with the through-hole electrode 34, the second electrode 36 includes a transmission electrode 37 and a second connection electrode 38, the transmission electrode 37 is electrically connected with the second connection electrode 38, the fine gate electrode 33 is provided on the front surface of the back-contact solar cell 31, the first connection electrode 35, the transmission electrode 37 and the second connection electrode 38 are provided on the back surface of the back-contact solar cell 31, and the sum of the number of the first connection electrode 35 and the second connection electrode 38 on any back-contact solar cell 31 is 100-.
In the embodiment of the utility model, when back contact solar wafer is the MWT battery, back contact solar wafer is provided with first electrode and second electrode, first electrode includes fine grid electrode, through hole electrode and first connecting electrode, fine grid electrode and first connecting electrode are connected with through hole electrode electricity respectively, the second electrode includes transmission electrode and second connecting electrode, transmission electrode is connected with the second connecting electrode electricity, back contact solar wafer's front is provided with fine grid electrode, back contact solar wafer's the back is provided with first connecting electrode, transmission electrode and second connecting electrode, the quantity sum of first connecting electrode and second connecting electrode on arbitrary back contact solar wafer is 100 + 10000.
Further, the first connection electrode 35 and the second connection electrode 38 are arranged in a lattice shape on the back surface of the back contact solar cell 31.
Further, the diameter of the first connection electrode 35 is 0.3 to 10mm, and the diameter of the second connection electrode 38 is 0.3 to 10 mm.
Further, the first solar cell group and the second solar cell group are electrically connected through a bus bar or a lead.
The utility model discloses an in the embodiment, first solar wafer group and second solar wafer group also can be connected through busbar or wire electricity, can reduce the area occupied of circuit to conductive metal forming to reduce conductive metal forming's area.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A solar cell module is characterized by comprising a rectangular frame, a plurality of first solar cell sets connected in series are arranged in the frame, the first solar cell set is in a regular hexagon shape, the first solar cell set comprises at least one first solar cell and a plurality of second solar cell sets connected in series, the second solar cell panel group is used for filling the gap between the first solar cell panel group and the frame, the second solar cell set comprises at least two second solar cells, the light receiving area of a single first solar cell set is equal to the light receiving area of a single second solar cell set, the second solar cell pieces in the second solar cell piece group are connected in parallel to form the second solar cell piece group, and the first solar cell piece group is connected with the second solar cell piece group in series.
2. The solar cell module as claimed in claim 1,
the first solar cell is a regular hexagon back contact solar cell,
the second solar cell is any one of a half of the regular hexagon back contact solar cell, a third of the regular hexagon back contact solar cell, a fourth of the regular hexagon back contact solar cell, a sixth of the regular hexagon back contact solar cell and a twelfth of the regular hexagon back contact solar cell.
3. The solar cell module as claimed in claim 1,
the first solar cell piece is any one of a half regular hexagon back contact solar cell piece, a third regular hexagon back contact solar cell piece, a quarter regular hexagon back contact solar cell piece, a sixth regular hexagon back contact solar cell piece and a twelfth regular hexagon back contact solar cell piece, the first solar cell pieces in the first solar cell piece group are connected in parallel to form the first solar cell piece group,
the second solar cell is any one of a half of the regular hexagon back contact solar cell, a third of the regular hexagon back contact solar cell, a fourth of the regular hexagon back contact solar cell, a sixth of the regular hexagon back contact solar cell and a twelfth of the regular hexagon back contact solar cell.
4. The solar cell module according to claim 1, wherein the adjacent first solar cell groups are connected in series along a long side direction or a wide side direction of the frame.
5. The solar cell module as claimed in claim 1, wherein the adjacent second solar cell pieces are connected in series.
6. The solar cell module as claimed in claim 1, wherein a plurality of the first solar cell sheet sets are arranged in a honeycomb shape in the frame.
7. The solar cell module according to claim 1, wherein the first solar cell panel group and the second solar cell panel group form a cell sheet layer, an insulating layer is fixedly connected to a back surface of the cell sheet layer, a plurality of conductive metal foil circuits are fixedly connected to a side of the insulating layer facing away from the cell sheet layer, a gap is formed between the adjacent conductive metal foil circuits, the first solar cell panel group and the second solar cell panel group are electrically connected through the conductive metal foil circuits, and a polymer back plate is bonded to a side of the conductive metal foil circuits facing away from the cell sheet layer through a bonding layer.
8. The solar cell module as claimed in claim 7, wherein a front encapsulant layer is fixedly attached to a side of the cell sheet layer facing away from the insulating layer, and a front cover plate is fixedly attached to a side of the front encapsulant layer facing away from the cell sheet layer.
9. The solar cell module as claimed in claim 7, wherein the insulating layer is provided with a plurality of openings at intervals, and the electrical connector is passed through the openings.
10. The solar cell assembly of claim 7 wherein the conductive metal foil circuit at the edge of the cell sheet layer exposes the edge of the cell sheet layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920248466.1U CN209981238U (en) | 2019-02-27 | 2019-02-27 | Solar cell module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920248466.1U CN209981238U (en) | 2019-02-27 | 2019-02-27 | Solar cell module |
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| CN209981238U true CN209981238U (en) | 2020-01-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904263A (en) * | 2019-02-27 | 2019-06-18 | 泰州隆基乐叶光伏科技有限公司 | Solar module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904263A (en) * | 2019-02-27 | 2019-06-18 | 泰州隆基乐叶光伏科技有限公司 | Solar module |
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