NL2034590A - Solar cell, method for printing solar cell, and photovoltaic module - Google Patents
Solar cell, method for printing solar cell, and photovoltaic module Download PDFInfo
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- NL2034590A NL2034590A NL2034590A NL2034590A NL2034590A NL 2034590 A NL2034590 A NL 2034590A NL 2034590 A NL2034590 A NL 2034590A NL 2034590 A NL2034590 A NL 2034590A NL 2034590 A NL2034590 A NL 2034590A
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- 238000007639 printing Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 19
- 238000004806 packaging method and process Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 230000007847 structural defect Effects 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
A solar cell, a method for printing solar cell, and a photovoltaic module. The solar cell has a rectangle shape, and along a thickness direction of the solar cell, the solar cell includes a first surface and a second surface. The solar cell is provided with electrode pads located on the first surface and the second surface, and along the thickness direction of the solar cell, projections of the electrode pads located on the first surface do not overlap projections of the electrode pads located on the second surface. (Fig. 1)
Description
SOLAR CELL, METHOD FOR PRINTING SOLAR CELL, AND
PHOTOVOLTAIC MODULE
[0001] The present disclosure relates to the technical field of solar cells and, in particular, to a solar cell, a method for printing solar cell, and a photovoltaic module.
[0002] Photovoltaic power generation is a technology that uses the photovoltaic effect of a semiconductor interface to convert light energy into electrical energy. The core unit is a photovoltaic module. The photovoltaic module generally includes a packaging structure, an adhesive film, and solar cell strings. The solar cell string is formed by connecting a plurality of solar cells through solder strips. Therefore, dimensions of the solar cells may directly affect dimensions of the photovoltaic module, thereby affecting power generation of the photovoltaic module.
[0003] Existing solar cells are generally square-shaped, among which 182 mmx182 mm and 210 mmx210 mm solar cells are commonly adopted. A photovoltaic module with solar cells of 182 mmx182 mm cannot meet the requirement on high power, and dimensions of a photovoltaic module with solar cells of 210 mmx210 mm are not in line with limitations on dimensions of containers, which may adversely affect transportation of the photovoltaic module.
[0004] The present disclosure provides a solar cell, a method for printing solar cell, and a photovoltaic module. The solar cell can have the advantage of high power while being applicable to conventional packaging and transportation manners.
[0005] The present disclosure provides a solar cell having a rectangle shape, and along a thickness direction of the solar cell, the solar cell includes a first surface and a second surface; and the solar cell is provided with electrode pads located on the first surface and the second surface, and along the thickness direction of the solar cell, projections of the electrode pads located on the first surface do not overlap projections of the electrode pads located on the second surface, and a distance d1 between one of the electrode pads located on the first surface and a most adjacent one of the electrode pads located on the second surface satisfies: 0.2 mmsd122 mm.
[0006] In one or more embodiments, the electrode pads are evenly distributed along a length direction of the solar cell or a width direction of the solar cell; or from a center of the solar cell to an edge of the solar cell, a distance between adjacent electrode pads gradually increases.
[0007] In one or more embodiments, a length L and a width W of the solar cell satisfy:
L/2+0.5 mmsWsL/2+5 mm.
[0008] In one or more embodiments, along an arrangement direction of the electrode pads, a minimum distance d2 between each of the electrode pads and an edge of the solar cell satisfies: 0.3 mm=d2<3 mm.
[0009] In one or more embodiments, the solar cell further includes busbars and fingers, each of the busbars includes connecting lines and harpoon structures, the harpoon structures are located at an edge of the connecting lines, and part of the fingers are connected to the harpoon structures.
[0010] In one or more embodiments, at least 2/3 of the fingers connected to the harpoon structures run through the harpoon structures.
[0011] In one or more embodiments, all the fingers connected to the harpoon structures run through the harpoon structures.
[0012] In one or more embodiments, the solar cell includes a cutting edge and a non- cutting edge, for the harpoon structures close to the cutting edge, all the fingers connected thereto run through the harpoon structures, and for the harpoon structures close to the non-cutting edge, at least 2/3 of the fingers connected thereto run through the harpoon structures.
[0013] The present disclosure further provides a method for printing solar cell as described above, the method includes: printing fingers on a cut solar cell; and printing busbars and electrode pads on the cut solar cell.
[0014] The present disclosure provides a photovoltaic module, including: at least one solar cell string, at least one packaging layer, and at least one cover plate, the at least one solar cell string is formed by connecting a plurality of solar cells as described above, the at last one packaging layer is configured to cover a surface of the at last one solar cell string, and the at last one cover plate is configured to cover a surface of the at last one packaging layer away from the at last one solar cell string.
[0015] It should be understood that the general description above and the detailed description in the following are merely exemplary and illustrative, and cannot limit the present disclosure.
[0016] FIG. 1 is a schematic structural diagram of a solar cell according to one or more embodiments of the present disclosure;
[0017] FIG. 2 is a schematic structural diagram of positions of electrode pads on the solar cell in FIG. 1;
[0018] FIG. 3 is a partial enlarged view of a region A in FIG. 1 in one or more embodiments;
[0019] FIG. 4 is a partial enlarged view of the region A in FIG. 1 in one or more embodiments;
[0020] FIG. 5 is a schematic structural diagram of a solar cell according to one or more embodiments of the present disclosure; and
[0021] FIG. 6 is a schematic structural diagram of a photovoltaic module according to one or more embodiments of the present disclosure.
[0022] The accompanying drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.
[0023] In order to better understand the technical solution of the present disclosure, embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
[0024] It is to be made clear that the described embodiments are only some rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts fall within the protection scope of the present disclosure.
[0025] The terms used in the embodiments of the present disclosure are intended only to describe particular embodiments and are not intended to limit the present disclosure. As used in the embodiments of the present disclosure and the appended claims, the singular forms of "a/an", "the", and "said" are intended to include plural forms, unless otherwise clearly specified by the context.
[0026] It is to be understood that the term "and/or" used herein is merely an association relationship describing associated objects, indicating that there may have three relationships. For example, A and/or B indicates that there are three cases of A alone, A and B together, and B alone. In addition, the character "/" herein generally means that associated objects before and after it are in an "or" relationship.
[0027] It is to be noted that the location terms such as "above", "below", "left", and “right” described in the embodiments of the present disclosure are described with reference to the angles shown in the accompanying drawings, and should not be construed as limitations on the embodiments of the present disclosure. In addition, in the context, it is to be further understood that, when one element is referred to as being connected "above" or "below" another element, the one element may be directly connected "above" or "below" another element, or connected "above" or "below" another element via an intermediate element.
[0028] Some embodiments of the present disclosure provide a solar cell 1. As shown in FIG. 1 and FIG. 2, the solar cell 1 is in the shape of a rectangle, and along a thickness direction of the solar cell 1, the solar cell 1 has a first surface and a second surface. The 5 solar cell 1 is provided with electrode pads 2. The electrode pads 2 are located on the first surface and the second surface, and along the thickness direction of the solar cell 1, projections of the electrode pads 2 located on the first surface do not overlap projections of the electrode pads 2 located on the second surface.
[0029] In one or more embodiments, as shown in FIG. 1, the solar cell 1 is in the shape of a rectangle, that is, the length and the width of the solar cell 1 are different, so as to increase the area of the solar cell 1 by increasing the length of the solar cell 1, thereby increasing the area of the photovoltaic module and improving power of the photovoltaic module. At the same time, the width of the solar cell 1 is set such that the solar cell 1 according to the present disclosure is still applicable to conventional manners of connection, packaging, and transportation of the solar cell 1, so there is no need to design new layout and packaging manners, which improves the power of the photovoltaic module without increasing manufacturing costs of the solar cell 1.
[0030] As shown in FIG. 2, the first surface and the second surface are an upper surface and a lower surface of the solar cell 1. Along the thickness direction of the solar cell 1, projections of the electrode pads 2 located on the first surface do not overlap projections of the electrode pads 2 located on the second surface. That is, the electrode pads 2 on the first surface and the electrode pads 2 on the second surface are misaligned, so as to prevent tin accumulation of the electrode pads 2 on two sides of the same position on the solar cell 1, improve strength of the solar cell 1, and make the solar cell 1less prone to hidden cracks.
[0031] In addition, the electrode pads 2 may be in shapes of rectangles, circles, or ellipses.
[0032] In some embodiments, as shown in FIG. 1 and FIG. 2, the electrode pads 2 are evenly arranged along a length direction or width direction of the solar cell 1 or from the center to the edge of the solar cell 1, a distance between adjacent electrode pads 2 gradually increases.
[0033] In one or more embodiments, as shown in FIG. 1 and FIG. 2, the electrode pads 2 are evenly arranged along the length direction or width direction of the solar cell 1, so that currents generated by the solar cell 1 can be better converged to the electrode pads 2 and then outputted to the outside, preventing the influence on the power of the photovoltaic module due to the incapability of the electrode pads 2 to effectively collect the currents generated by the solar cell 1.
[0034] In addition, the electrode pads 2 may also be distributed on the solar cell 1 in the following manner. From the center to the edge of the solar cell 1, a distance between adjacent electrode pads 2 gradually increases. Adjustment of the distance between the adjacent electrode pads 2 can effectively prevent overlapping of the electrode pads 2 on two sides of the solar cell 1, which ensures strength and rigidity of the solar cell 1 and makes the solar cell 1 less prone to hidden cracks.
[0035] In some embodiments, widths of the electrode pads 2 range from 0.5 mm to 1.2 mm, and lengths of the electrode pads 2 range from 0.6 mm to 1.4 mm. For example, the widths of the electrode pads 2 may be 0.5 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, or the like, and the lengths of the electrode pads 2 may be 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, or the like.
[0036] In one or more embodiments, dimensions of the electrode pads 2 should not be excessively large or excessively small. If the dimensions of the electrode pads 2 are excessively small (e.g., the electrode pads 2 have widths of less than 0.5 mm and lengths less than 0.6 mm), the electrode pads 2 cannot provide sufficient soldering tension, resulting in poor soldering and affecting performance of the solar cell 1. If the dimensions of the electrode pads 2 are excessively large (e.g., the electrode pads 2 have widths of greater than 1.2 mm and lengths greater than 1.4 mm), raw materials required to form the electrode pads 2 are increased, resulting in an increase in the manufacturing costs of the solar cell. Therefore, when the widths of the electrode pads 2 range from 0.5 mm to 1.2 mm and the lengths of the electrode pads 2 range from 0.6 mm to 1.4 mm, the manufacturing costs of the solar cell 1 can be reduced while sufficient soldering tension is provided.
[0037] In some embodiments, the dimensions of the electrode pads 2 close to the edge of the solar cell 1 are greater than the dimensions of the other electrode pads 2 on the solar cell 1.
[0038] In one or more embodiments, as shown in FIG. 1, the edge of the solar cell 1 has a relatively high cold solder proportion, the dimensions of the electrode pads 2 close tothe edge of the solar cell 1 are greater than the dimensions of the other electrode pads 2 on the solar cell 1 can reduce the cold solder proportion of the electrode pads 2 at the edge of the solar cell 1. In some embodiments, the electrode pads 2 close to the edge of the solar cell 1 have lengths of 1.2 mm and widths of 0.8 mm, and the other electrode pads 2 on the solar cell 1 have lengths of 0.8 mm and widths of 0.6 mm.
[0039] In some embodiments, along a length direction or width direction of the solar cell 1, distances d1 between the electrode pads 2 located on the first surface and the electrode pads 2 located on the second surface closest thereto satisfy: 0.2 mm=d1s2 mm. For example, the distances d1 may be 0.2 mm, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, or the like.
[0040] In one or more embodiments, along the length direction or width direction of the solar cell 1, the distances d1 between the electrode pads 2 located on the first surface and the electrode pads 2 located on the second surface closest thereto should not be excessively large or excessively small. If the distances d1 are excessively large (e.g., greater than 2 mm), the electrode pads 2 may be unevenly distributed on the solar cell 1, which affects convergence and discharge of the currents generated by the solar cell 1, thereby affecting the power of the photovoltaic module. If the distances d1 are excessively small (e.g., less than 0.2 mm), the electrode pads 2 located on the first surface cannot effectively avoid the electrode pads 2 located on the second surface or the electrode pads 2 located on the second surface cannot effectively avoid the electrode pads 2 located on the first surface, resulting in stress concentration on the solar cell 1, and thus prone to hidden cracks. Therefore, when, along the length direction or width direction of the solar cell 1, the distances d1 between the electrode pads 2 located on the first surface and the electrode pads 2 located on the second surface closest thereto satisfy 0.2 mmsd122 mm, smooth convergence and discharge of the currents generated by the solar cell 1 can be ensured while rigidity and strength of the solar cell 1 are ensured.
[0041] In some embodiments, a length L and a width W of the solar cell 1 satisfy:
L/2+40.5 mm=sW=L/2+5 mm. For example, the length L and the width W may be in the following relation: W=L/2+0.5 mm, W=L/2+1 mm, W=L/2+3 mm, W=L/2+5 mm, or the like.
[0042] In one or more embodiments, when the length L and the width W of the solar cell 1 satisfy L/2+0.5 mm=sW=L/2+5 mm, on the one hand, the width of each solar cell 1 is increased, so that the area of the photovoltaic module formed by connecting the solar cells 1 can be greatly increased, so as to effectively improve the power of the photovoltaic module. On the other hand, since each solar cell 1 is slightly different from the existing solar cell in dimension, there is no need to change the manner of machining, packaging, and transportation of the solar cell 1, so as to effectively control the manufacturing costs of the solar cell 1. At the same time, numbers of busbars 3 and fingers 4 on the solar cell 1 are not required to be changed, and only distances between adjacent busbars 3 and adjacent fingers 4 are required to be adjusted, so as not to increase the manufacturing costs of the solar cell 1.
[0043] In some embodiments, the area of the solar cell 1 in the present disclosure is increased by 5% to 20% compared with the area of the existing solar cell 1, which effectively increases the light-receiving area of the photovoltaic module and improves the power of the photovoltaic module.
[0044] In some embodiments, along an arrangement direction of the electrode pads
2, a minimum distance d2 between the electrode pads 2 and the edge of the solar cell 1 satisfies: 0.3 mm=d2<3 mm. For example, the minimum distance d2 between the electrode pads 2 and the edge of the solar cell 1 may be 0.3 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, or the like.
[0045] In one or more embodiments, the minimum distance d2 between the electrode pads 2 and the edge of the solar cell 1 should not be excessively large or excessively small. If the distance d2 is excessively large (e.g., greater than 3 mm), it is more difficult for currents generated at the edge of the solar cell 1 to flow to the electrode pads 2, and current losses of the solar cell 1 increase, which affects the power of the photovoltaic module formed by connecting the solar cells 1. If the distance d2 is excessively small (e.g., less than 0.3 mm), the solar cell 1 is required to be provided with more electrode pads 2, which increases the manufacturing costs of the solar cell 1. At the same time, shielding of the surface of the solar cell 1 by the electrode pads 2 may also affect utilization of sunlight by the solar cell 1, thereby adversely affecting photoelectric conversion efficiency of the solar cell 1. Therefore, when along the arrangement direction of the electrode pads 2, the minimum distance d2 between the electrode pads 2 and the edge of the solar cell 1 satisfies: 0.3 mm=d2<3 mm, the power of the photovoltaic module formed by connecting the solar cells 1 can be ensured.
[0046] In some embodiments, as shown in FIG. 1, the solar cell 1 is provided with busbars 3 and fingers 4, the busbars 3 include connecting lines 31 and harpoon structures 32, the harpoon structures 32 are located at edges of the connecting lines 31, and part of the fingers 4 are connected to the harpoon structures 32.
[0047] In one or more embodiments, as shown in FIG. 1, the busbars 3 and the fingers 4 are both located on the solar cell 1. Each the busbars 3 include connecting lines 31 and harpoon structures 32, part of the fingers 4 are connected to the connecting lines 31, and part of the fingers 4 are connected to the harpoon structures 32. Electrode pads 2 are formed on the busbars 3, and the harpoon structures 32 and the connecting lines 31 are connected through the electrode pads 2. Since the harpoon structures are located at the edge of the solar cell 1, the harpoon structures 32 can effectively converge currents collected by the fingers 4 at the edge of the solar cell 1, which increases power of the solar cell 1.
[0048] In addition, as shown in FIG. 5, the busbars 3 may be discontinuously arranged, thereby reducing machining difficulty of the busbars 3.
[0049] In some embodiments, both the first surface and the second surface of the solar cell 1 may be applied to the structure of the busbars 3 shown in FIG. 1. In some embodiments, both the first surface and the second surface of the solar cell 1 may be applied to the structure of the busbars 3 shown in FIG. 5. In some embodiments, the first
IO surface of the solar cell 1 may be applied to the structure of the busbars 3 shown in FIG. 1, and the second surface of the solar cell 1 may be applied to the structure of the busbars 3 shown in FIG. 5, or the first surface of the solar cell 1 may be applied to the structure of the busbars 3 shown in FIG. 5 and the second surface of the solar cell 1 may be applied to the structure of the busbars 3 shown in FIG. 1, so as to adapt to different application scenarios.
[0050] In some embodiments, as shown in FIG. 3, all the fingers 4 connected to the harpoon structures 32 run through the harpoon structures 32.
[0051] In one or more embodiments, as shown in FIG. 3, all the fingers 4 connected to the harpoon structures 32 run through the harpoon structures 32, which improves capability of the harpoon structures 32 to collect currents, thereby increasing the power of the solar cell 1 and the photovoltaic module.
[0052] In some embodiments, as shown in FIG. 4, at least 2/3 of the fingers 4 connected to the harpoon structures 32 run through the harpoon structures 32.
[0053] In one or more embodiments, as shown in FIG. 4, at least 2/3 of the fingers 4 connected to the harpoon structures 32 run through the harpoon structures 32, which, on the one hand, ensures capability of the harpoon structures 32 to collect currents, and on the other hand, reduces paste required to form the harpoon structures 32 and thus reduces the manufacturing costs of the solar cell 1.
[0054] In some embodiments, as shown in FIG. 3 and FIG. 4, the solar cell 1 has a cutting edge and a non-cutting edge, for the harpoon structures 32 close to the cutting edge, all the fingers 4 connected thereto run through the harpoon structures 32, and for the harpoon structures 32 close to the non-cutting edge, at least 2/3 of the fingers 4 connected thereto run through the harpoon structures 32.
[0055] In one or more embodiments, the cutting edge of the solar cell 1 produces structural defects during the cutting, which is prone to recombination of carriers.
Therefore, for the harpoon structures 32 close to the cutting edge, all the fingers 4 connected thereto running through the harpoon structures 32 can improve the capability of the harpoon structures 32 to collect currents and effectively increase power of the solar cell 1. There are fewer structural defects on the non-cutting edge of the solar cell 1, and there are fewer recombination of carriers. Therefore, for the harpoon structures 32 close to the non-cutting edge, at least 2/3 of the fingers 4 connected thereto running through the harpoon structures 32 can reduce the paste required to form the harpoon structures 32 and reduces the manufacturing costs of the solar cell 1. Therefore, the cutting edge and the non-cutting edge of the solar cell 1 having different harpoon structures 32 can reduce the manufacturing costs of the solar cell 1 while ensuring effective collection of the currents generated by the solar cell 1.
[0056] In some embodiments, a number of the busbars 3 on one solar cell 1 is 14 to 16, and a distance between adjacent busbars 3 ranges from 10 mm to 15 mm. The number of the fingers 4 on one solar cell 1 is 90 to 140, and a distance between adjacent fingers 4 ranges from 0.5 mm to 1.5 mm.
[0057] In some embodiments, the number of the electrode pads 2 arranged on one busbar 3 is 3 to 15. For example, the number of the electrode pads arranged on one busbar 3 may be 3, 5, 8, 10, 12, 15, or the like.
[0058] Some embodiments of the present disclosure provide a method for printing the solar cell 1 described in the above embodiments. The printing method for the solar cell 1 includes the following steps.
[0059] In S1, fingers 4 are printed on the cut solar cell 1.
[0060] In S2, busbars 3 and electrode pads 2 are printed on the cut solar cell 1.
[0061] In one or more embodiments, the fingers 4 are first printed on the solar cell 1, and then the busbars 3 are printed on the solar cell 1. Therefore, positions of the electrode pads 2 may overlap those of the fingers 4. When the positions of the electrode pads 2 and the fingers 4 overlap, the electrode pads 2 may still be connected to the busbars 3. Areas of contact between the electrode pads 2 and the busbars 3 are larger, and connection strength is more reliable. Therefore, the electrode pads 2 are not required to keep off from the fingers 4, reducing difficulty of printing.
[0062] Some embodiments of the present disclosure provide a photovoltaic module.
As shown in FIG. 6, the photovoltaic module includes: at least one solar cell string 110, at least one packaging layer 120, and at least one cover plate 130. The solar cell string 110 is formed by connecting a plurality of solar cells 1. The packaging layer 120 is configured to cover upper and lower surfaces of the solar cell string 110. The cover plate 130 is configured to cover a surface of the packaging layer 120 away from the solar cell string 110.
[0063] In one or more embodiments, as shown in FIG. 6, a plurality of solar cells in the solar cell string 110 are electrically connected in series and/or in parallel. Through a lamination process, the cover plate 130, the packaging layer 120, and the solar cell string 110 can be pressed in a certain order to obtain a laminated assembly, and then a frame may be installed on the laminated assembly to form the photovoltaic module, so as to facilitate transportation and use.
[0064] In addition, the solar cell string 110 is packaged through the packaging layer 120 and the cover plate 130, which can ensure high mechanical strength of the photovoltaic module and reduce the influence of hail impact, wind blowing, mechanical vibration, and the like. A packaging process can also improve sealing performance of the photovoltaic module and improve corrosion resistance and safety thereof.
[0065] The above are merely some embodiments of the present disclosure, and are not intended to limit the present disclosure.
For those skilled in the art, the present disclosure may be subject to various modifications and changes.
Any modification, equivalent replacement, improvement and the like within the spirit and principle of the present disclosure all fall within the protection scope of the present disclosure.
Claims (15)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310018174.XA CN116031321B (en) | 2023-01-06 | 2023-01-06 | Battery piece, printing method of battery piece and photovoltaic module |
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| Publication Number | Publication Date |
|---|---|
| NL2034590A true NL2034590A (en) | 2024-07-12 |
| NL2034590B1 NL2034590B1 (en) | 2025-05-27 |
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| NL2034590A NL2034590B1 (en) | 2023-01-06 | 2023-04-17 | Solar cell, method for printing solar cell, and photovoltaic module |
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| CN (1) | CN116031321B (en) |
| DE (1) | DE202023101877U1 (en) |
| NL (1) | NL2034590B1 (en) |
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| CN117199146A (en) * | 2023-11-07 | 2023-12-08 | 晶科能源(海宁)有限公司 | Solar cell, preparation method thereof and photovoltaic module |
| CN119069557B (en) * | 2024-08-20 | 2025-11-11 | 晶科能源股份有限公司 | A photovoltaic module |
| CN119069556A (en) * | 2024-08-20 | 2024-12-03 | 晶科能源股份有限公司 | A photovoltaic module |
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| US20180090633A1 (en) * | 2016-09-27 | 2018-03-29 | Lg Electronics Inc. | Solar cell and solar cell panel including the same |
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Also Published As
| Publication number | Publication date |
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| CN116031321B (en) | 2025-12-09 |
| NL2034590B1 (en) | 2025-05-27 |
| DE202023101877U1 (en) | 2023-08-08 |
| CN116031321A (en) | 2023-04-28 |
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