CN116154010A - Solar cell and photovoltaic module - Google Patents
Solar cell and photovoltaic module Download PDFInfo
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- CN116154010A CN116154010A CN202310165632.2A CN202310165632A CN116154010A CN 116154010 A CN116154010 A CN 116154010A CN 202310165632 A CN202310165632 A CN 202310165632A CN 116154010 A CN116154010 A CN 116154010A
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- 210000004027 cell Anatomy 0.000 claims abstract description 53
- 210000005056 cell body Anatomy 0.000 claims abstract description 23
- 229910000679 solder Inorganic materials 0.000 claims description 11
- 238000003466 welding Methods 0.000 abstract description 17
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000002313 adhesive film Substances 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
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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
Abstract
The invention discloses a solar cell and a photovoltaic module, wherein the solar cell comprises: the second surface of the battery piece main body is provided with second thin grid lines which are distributed along a second direction and extend along a third direction; the second thin grid line comprises a first part and a second part which are stacked along the first direction, the third surface of the first part is connected with the second surface, and the fifth surface is connected with the second part; the seventh surface and the ninth surface of the second portion are disposed opposite to each other in the first direction, the eighth surface and the tenth surface are disposed opposite to each other in the second direction, and the width R of the fifth surface > the width S of the seventh surface > the width T of the ninth surface in the second direction. By arranging the structure that the first part and the second part are laminated, the thickness of the second thin grid line is increased, and the second thin grid line is prevented from being welded through when welding the welding strip; the width S of the seventh surface is greater than the width T of the ninth surface, i.e., the eighth surface and/or the tenth surface are inclined surfaces, so that part of light is reflected into the cell body, and the photoelectric conversion efficiency of the solar cell is improved.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a solar cell and a photovoltaic module.
Background
Along with the increasing exhaustion of fossil energy, new energy technology becomes a research hot spot, new energy is based on new technology and new material, so that traditional renewable energy is developed and utilized in a modern way, and a solar photovoltaic module is an important component of new energy industry and is formed by laminating a front plate, a series-welded solar cell, a front packaging adhesive film, a back packaging adhesive film, a welding strip, a bus bar and a back plate and then installing a junction box.
The absorption and conversion quantity of the solar cell to the light directly affects the short-circuit current of the solar cell, and compared with a bare solar cell, the source of light absorbed by the solar cell in the solar photovoltaic module directly irradiates the solar cell and simultaneously has light reflected by the packaging material inside the solar photovoltaic module, so that the short-circuit current of the solar cell can be improved by improving the photoelectric conversion efficiency of the solar cell in the solar photovoltaic module, and the module power of the solar photovoltaic module is improved.
Disclosure of Invention
In view of the above, the present invention provides a solar cell and a photovoltaic module.
In one aspect, the present invention provides a solar cell, comprising: the battery piece main body comprises a first surface and a second surface which are oppositely arranged along a first direction, wherein the first surface is provided with first thin grid lines which are distributed along a second direction and extend along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the second surface is provided with second fine grid lines which are distributed along the second direction and extend in the third direction;
the second thin grid line comprises a first part extending along the third direction, the first part comprises a third surface, a fourth surface, a fifth surface and a sixth surface which are sequentially connected end to end, the third surface and the fifth surface are oppositely arranged along the first direction, the fourth surface and the sixth surface are oppositely arranged along the second direction, and the third surface is connected with the second surface;
the second thin grid line further comprises a second portion extending along the third direction, the second portion comprises a seventh surface, an eighth surface, a ninth surface and a tenth surface which are sequentially connected end to end, the seventh surface and the ninth surface are oppositely arranged along the first direction, the eighth surface and the tenth surface are oppositely arranged along the second direction, the seventh surface is connected with the fifth surface, the width of the fifth surface is R along the second direction, the width of the seventh surface is S, and the width of the ninth surface is T, and R > S > T.
On the other hand, the invention also provides a photovoltaic module, which comprises the solar cell.
Compared with the prior art, the solar cell provided by the invention has the following beneficial effects:
the solar cell provided by the invention comprises a cell body, wherein the cell body comprises a first surface and a second surface which are oppositely arranged along a first direction, the first surface is provided with first thin grid lines which are distributed along a second direction and extend along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the second surface is provided with second fine grid lines which are distributed along a second direction and extend along a third direction; the second thin grid line comprises a first part extending along a third direction, the first part comprises a third surface, a fourth surface, a fifth surface and a sixth surface which are sequentially connected end to end, the third surface and the fifth surface are oppositely arranged along the first direction, the fourth surface and the sixth surface are oppositely arranged along a second direction, and the third surface is connected with the second surface; the second thin grid line further comprises a second part extending along a third direction, the second part comprises a seventh surface, an eighth surface, a ninth surface and a tenth surface which are sequentially connected end to end, the seventh surface and the ninth surface are oppositely arranged along the first direction, the eighth surface and the tenth surface are oppositely arranged along the second direction, the seventh surface is connected with the fifth surface, the width of the fifth surface is R, the width of the seventh surface is S, the width of the ninth surface is T, R is more than S and is more than T, and the thickness of the second thin grid line is increased along the first direction by arranging the laminated structure of the first part and the second part, so that the second thin grid line can be prevented from being penetrated during welding a welding strip; the width R of the fifth surface is larger than the width S of the seventh surface, so that the contact area of the main grid and the second thin grid line is increased, namely the length of the interface between the main grid line and the second thin grid line is prolonged, and the problem of grid breakage caused by the penetration of molten tin of the welding strip along the interface between the main grid line and the second thin grid line when the welding strip is welded is improved; the width S of the seventh surface is larger than the width T of the ninth surface, namely, the eighth surface and/or the tenth surface are inclined surfaces, and part of light is reflected at the inclined surfaces and is emitted to the inside of the battery piece main body, so that the light utilization rate of the solar battery piece is improved, and the efficiency of the solar battery piece is improved.
Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a solar cell according to the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a cross-sectional view taken along the direction B-B' in FIG. 1;
FIG. 4 is another cross-sectional view taken along the direction B-B' in FIG. 1;
FIG. 5 is a cross-sectional view taken along the direction C-C' in FIG. 1;
fig. 6 is a schematic view of another structure of the solar cell provided by the present invention;
fig. 7 is a schematic structural diagram of the photovoltaic module provided by the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Referring to fig. 1, 2 and 3, fig. 1 is a schematic structural view of a solar cell provided in the present invention, fig. 2 is an enlarged view of a portion a in fig. 1, and fig. 3 is a cross-sectional view of a portion B-B' in fig. 1, to illustrate a specific embodiment of a solar cell 000 provided in the present invention, including:
the battery piece main body 1 comprises a first surface 2 and a second surface 3 which are oppositely arranged along a first direction X, wherein the first surface 2 is provided with first thin grid lines 4 which are distributed along a second direction Y and extend along a third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; the second surface 3 is provided with second fine grid lines 5 which are arranged along a second direction Y and extend along a third direction Z;
the second thin-gate line 5 comprises a first portion 6 extending along a third direction Z, the first portion 6 comprises a third surface 7, a fourth surface 8, a fifth surface 9 and a sixth surface 10 which are connected end to end in sequence, the third surface 7 is arranged opposite to the fifth surface 9 along the first direction X, the fourth surface 8 is arranged opposite to the sixth surface 10 along a second direction Y, and the third surface 7 is connected with the second surface 3;
the second thin-gate line 5 further comprises a second portion 11 extending along a third direction Z, the second portion 11 comprising a seventh surface 12, an eighth surface 13, a ninth surface 14 and a tenth surface 15 connected end to end in sequence, the seventh surface 12 being arranged opposite the ninth surface 14 along the first direction X, the eighth surface 13 and the tenth surface 15 being arranged opposite the second direction Y, the seventh surface 12 being connected to the fifth surface 9, the fifth surface 9 having a width R in the second direction Y, the seventh surface 12 having a width S, the ninth surface 14 having a width T, R > S > T.
It can be understood that the battery main body 1 includes a first surface 2 and a second surface 3 that are disposed opposite to each other along the first direction X, and in this embodiment, only the first surface 2 is a light-receiving surface, and the second surface 3 is a light-receiving surface, which is taken as an example, however, the first surface 2 may be a light-receiving surface, and the second surface 3 is a light-receiving surface. The overlapping structure of the first portion 6 and the second portion 11 in the first direction X can increase the thickness of the second thin gate line 5, and can prevent the second thin gate line 5 from being penetrated during welding of the strap; in the second direction Y, the width R of the fifth surface 9 of the first portion 6 is greater than the width S of the seventh surface 12 of the second portion 11, and when the main grid line is printed, the contact area between the main grid line and the second thin grid line 5 is increased, the interface area between the main grid line and the second thin grid line 5 is prolonged, and the interface length between the main grid line and the second thin grid line 5 in the second direction Y is prolonged, namely, the penetration path of solder strip molten tin along the interface between the main grid line and the second thin grid line 5 during solder strip welding is prolonged, so that the problem of grid breakage is avoided, and the contact stability of the main grid line and the second thin grid line 5 is ensured; in the second direction Y, the width of the seventh surface 12 is S greater than the width of the ninth surface 14 and T, the eighth surface 13 or the tenth surface 15 is an inclined surface 20, or the eighth surface 13 and the tenth surface 15 are both inclined surfaces 20, in fig. 3, only the eighth surface 13 and the tenth surface 15 are illustrated as inclined surfaces 20, when light is directed to the inclined eighth surface 13 or the inclined tenth surface 15, a part of the light is reflected by the eighth surface 13 and the tenth surface 15 and is directed to the inside of the solar cell, so as to improve the light utilization rate of the solar cell 000, thereby improving the efficiency of the solar cell 000.
Compared with the prior art, the solar cell 000 provided by the embodiment has the following advantages:
the solar cell 000 provided by the invention comprises a cell main body 1, wherein the cell main body comprises a first surface 2 and a second surface 3 which are oppositely arranged along a first direction X, the first surface 2 is provided with first thin grid lines 4 which are distributed along a second direction Y and extend along a third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; the second surface 3 is provided with second fine grid lines 5 which are arranged along a second direction Y and extend along a third direction Z; the second thin-gate line 5 comprises a first portion 6 extending along a third direction Z, the first portion 6 comprises a third surface 7, a fourth surface 8, a fifth surface 9 and a sixth surface 10 which are connected end to end in sequence, the third surface 7 is arranged opposite to the fifth surface 9 along the first direction X, the fourth surface 8 is arranged opposite to the sixth surface 10 along a second direction Y, and the third surface 7 is connected with the second surface 3; the second thin-gate line 5 further comprises a second portion 11 extending along a third direction Z, the second portion 11 comprises a seventh surface 12, an eighth surface 13, a ninth surface 14 and a tenth surface 15 which are sequentially connected end to end, the seventh surface 12 and the ninth surface 14 are oppositely arranged along the first direction X, the eighth surface 13 and the tenth surface 15 are oppositely arranged along the second direction Y, the seventh surface 12 is connected with the fifth surface 9, the width of the fifth surface 9 is R along the second direction Y, the width of the seventh surface 12 is S, the width of the ninth surface 14 is T, and R > S > T along the first direction X, by arranging the structure that the first portion 6 and the second portion 11 are laminated, the thickness of the second thin-gate line 5 is increased, and the second thin-gate line 5 can be prevented from being penetrated when welding a welding strip; the width R of the fifth surface 9 is larger than the width S of the seventh surface 12, so that the contact area of the main grid and the second thin grid line 5 is increased, namely the length of the interface between the main grid line and the second thin grid line 5 is prolonged, and the problem of grid breakage caused by the penetration of molten tin of the welding strip along the interface between the main grid line and the second thin grid line 5 when the welding strip is welded is improved; the width S of the seventh surface 12 is greater than the width T of the ninth surface 14, that is, the eighth surface 13 and/or the tenth surface 15 are inclined surfaces 20, and part of light is reflected at the inclined surfaces 20 and is directed to the inside of the solar cell body 1, so as to improve the light utilization rate of the solar cell 000, thereby improving the efficiency of the solar cell 000.
In some alternative embodiments, referring to fig. 1 and 4, fig. 4 is another cross-sectional view taken along direction B-B' in fig. 1, and the fifth surface 9 is provided with a solder resist 16 extending in the third direction Z, wherein the front projection of the solder resist 16 on the battery cell body 1 does not overlap with the front projection of the second portion 11 on the battery cell body 1.
It will be appreciated that the material of the solder mask portion 16 may be epoxy or polyester, but is not limited to this, and that the solder mask portion 16 is located on the fifth surface 9, and that when solder mask is infiltrated along the interface between the main grid line and the second thin grid line 5, the solder mask portion 16 cuts off the infiltration path of the solder mask and prevents the risk of gate breakage.
In some alternative embodiments, with continued reference to fig. 1 and 3, the third surface 7 has a length U, U > R, in the second direction Y.
It is understood that, along the second direction Y, the length U of the third surface 7 is greater than the width R of the fifth surface 9, i.e. the fourth surface 8 is an inclined surface 20, or the sixth surface 10 is an inclined surface 20, or both the fourth surface 8 and the sixth surface 10 are inclined surfaces 20, and only the fourth surface 8 and the sixth surface 10 are illustrated as inclined surfaces 20 in fig. 3, although not limited thereto, the inclined fourth surface 8 or the sixth surface 10 can reflect part of the light into the cell body 1 to improve the light utilization rate, thereby improving the efficiency of the solar cell 000.
In some alternative embodiments, with continued reference to fig. 1 and 4, in the second direction Y, the third surface 7 has a length U, u=r;
the fourth surface 8 is a cambered surface protruding towards the side remote from the sixth surface 10 and/or the sixth surface 10 is a cambered surface protruding towards the side remote from the fourth surface 8.
It can be understood that, in fig. 4, only the fourth surface 8 and the sixth surface 10 are illustrated as protruding cambered surfaces, and of course, not limited to this, the fourth surface 8 or the sixth surface 10 of the cambered surfaces can reflect light to the inside of the solar cell body 1, and at the same time, can further diffuse light, and part of the light can be reflected between the fourth surface 8 and the sixth surface 10 of two adjacent second thin grid lines 5 for multiple times, so as to enter the inside of the solar cell body 1, thereby further improving the photoelectric conversion efficiency of the solar cell 000.
In some alternative embodiments, with continued reference to fig. 1 and 3, the third surface 7 has a length U in the second direction Y, and the first thin gate line 4 has a width V, U > V.
It will be appreciated that, in the second direction Y, the length U of the third surface 7 is greater than the width V of the first thin-grating line 4, i.e. the area of the third surface 7 is increased, when light passes through the first surface 2 and is directed to the third surface 7, the light is reflected at the third surface 7 and is directed to the inside of the battery main body 1, and the greater the area of the third surface 7, the more light can be reflected back to the inside of the battery main body, thereby improving the photoelectric conversion efficiency of the solar battery 000.
In some alternative embodiments, referring to fig. 1 and 5, fig. 5 is a cross-sectional view taken along direction C-C' in fig. 1, the first thin-gate line 4 includes an eleventh surface 17, a twelfth surface (not shown), a thirteenth surface 18, and a fourteenth surface (not shown) that are connected end-to-end, the eleventh surface 17 and the thirteenth surface 18 being disposed opposite each other along a first direction X, the twelfth surface being disposed opposite the fourteenth surface along a second direction Y, the eleventh surface 17 being connected to the first surface 2, the thirteenth surface 18 being provided with at least one groove 19, the groove 19 extending along the second direction Y, through the twelfth surface and the fourteenth surface;
the recess 19 has a bevel 20.
It can be understood that, along the first direction X, the interval between the bottom surface of the groove 19 and the first surface 2 is greater than 0, the groove 19 has an inclined surface 20, a part of oblique light is reflected when being directed to the inclined surface 20 of the groove 19, and is directed to other film layers after being reflected, and then the light is reflected to the inside of the battery piece main body 1 by the other film layers, so that the incident amount of the light is increased, the efficiency of the solar cell is improved, and the unit consumption can be reduced by arranging the groove 19, and the cost is saved.
In some alternative embodiments, with continued reference to fig. 1 and 5, a cross-section is taken in a direction perpendicular to the plane of the battery plate body 1, the cross-section extending in a third direction Z, and the recess 19 is triangular or trapezoidal in cross-section.
It will be appreciated that the grooves 19 are triangular or trapezoidal in cross-section, i.e. the grooves 19 have at least one inclined surface 20 for reflecting light, and that the grooves 19 are arranged in a regular shape for ease of manufacture.
In some alternative embodiments, referring to fig. 1 and fig. 6, fig. 6 is a schematic view of another structure of a solar cell provided in the present invention, where two adjacent first thin-grid lines 4 are between orthographic projections of a cell body 1, and at least include orthographic projections of one second thin-grid line 5 on the cell body 1.
It can be understood that, in fig. 1, only the front projection of two adjacent first thin-grid lines 4 between the front projections of the battery plate body 1 is illustrated, including the front projection of one second thin-grid line 5 between the front projections of the battery plate body 1, in fig. 6, only the front projection of two adjacent first thin-grid lines 4 between the front projections of the battery plate body 1 is illustrated, including the front projection of two second thin-grid lines 5 between the front projections of the battery plate body 1, although not limited thereto, the number of the second thin-grid lines 5 between the front projections of the battery plate body 1 of two adjacent first thin-grid lines 4 can be adjusted according to the actual requirement, the embodiment is not limited specifically, the position of two adjacent first thin-grid lines 4 between the front projections of the battery plate body 1 is set to correspond to the position of the larger light quantity, so that the light reaching the second surface 3 is reflected back into the battery plate body 1 to improve the photoelectric conversion efficiency. The two adjacent first thin grid lines 4 are between the orthographic projections of the battery piece main body 1, and the orthographic projections of the battery piece main body 1 of the two adjacent second thin grid lines 5 are included, namely, the number of the second thin grid lines 5 is increased on the basis that the positions of the second thin grid lines 5 are arranged to correspond to the positions with more light quantity, and the effect of the solar battery piece 000 is higher as the number of the second thin grid lines 5 is larger and the light ray can be reflected.
In some alternative embodiments, with continued reference to FIGS. 1 and 2, in the second direction Y, the spacing between adjacent first thin-gridlines 4 is D, and the minimum distance from the orthographic projection of the second thin-gridline 5 on the battery cell body 1 to the orthographic projection of the first thin-gridline 4 on the battery cell body 1 is L, D/5.ltoreq.L.ltoreq.D/2.
It is understood that the amount of light between the orthographic projections of the adjacent first thin grid lines 4 on the battery plate main body 1 is relatively large, the minimum distance from the orthographic projection of the second thin grid lines 5 on the battery plate main body 1 to the orthographic projection of the first thin grid lines 4 on the battery plate main body 1 is L, D/5 is not less than L and not more than D/2, the second thin grid lines 5 are located in the area with relatively large amount of light, the reflection effect is improved, and of course, the invention is not limited thereto, L < D/5 can be provided, and the effect of the reflection part reaching the second surface 3 is also provided.
Referring to fig. 1 and 7, fig. 7 is a schematic structural diagram of a photovoltaic module according to the present invention, where the photovoltaic module 100 according to the present invention includes any solar cell 000 of the foregoing embodiments, and fig. 7 only illustrates that the photovoltaic module 100 is a dual-glass photovoltaic module 100, including a first glass 21, a first adhesive film 22, a solar cell 000, a second adhesive film 23, and a second glass 24 stacked along a first direction X, and of course, but not limited thereto, light reflected by the groove 19 may be directed to the first glass 21 or the first adhesive film 22, reflected back into the cell body 1 through the first glass 21 or the first adhesive film 22, and directed to a fourth surface 8, a sixth surface 10, an eighth surface 13, or a tenth surface 15 of the second thin grid line 5 of the solar cell 000, and may be reflected to the second thin grid line 5 after reaching the second adhesive film 23 or the second glass 24.
TABLE 1 comparison of results of control experiments
As shown in table 1, the front projection of the adjacent two first thin-grid lines 4 on the battery main body 1 at least includes the front projection of the second thin-grid line 5 on the battery main body 1, or the increase of the width of the second thin-grid line 5 along the second direction Y can increase the efficiency of the solar cell 000 provided by the embodiment of the invention, thereby increasing the efficiency of the photovoltaic module 100 including the solar cell 000 provided by the embodiment of the invention. The photovoltaic module 100 provided in this embodiment has the beneficial effects of the solar cell 000 provided in this embodiment, and this embodiment is not described in detail herein.
According to the embodiment, the solar cell provided by the invention has the following beneficial effects:
the solar cell provided by the invention comprises a cell body, wherein the cell body comprises a first surface and a second surface which are oppositely arranged along a first direction, the first surface is provided with first thin grid lines which are distributed along a second direction and extend along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the second surface is provided with second fine grid lines which are distributed along a second direction and extend along a third direction; the second thin grid line comprises a first part extending along a third direction, the first part comprises a third surface, a fourth surface, a fifth surface and a sixth surface which are sequentially connected end to end, the third surface and the fifth surface are oppositely arranged along the first direction, the fourth surface and the sixth surface are oppositely arranged along a second direction, and the third surface is connected with the second surface; the second thin grid line further comprises a second part extending along a third direction, the second part comprises a seventh surface, an eighth surface, a ninth surface and a tenth surface which are sequentially connected end to end, the seventh surface and the ninth surface are oppositely arranged along the first direction, the eighth surface and the tenth surface are oppositely arranged along the second direction, the seventh surface is connected with the fifth surface, the width of the fifth surface is R, the width of the seventh surface is S, the width of the ninth surface is T, R is more than S and is more than T, and the thickness of the second thin grid line is increased along the first direction by arranging the laminated structure of the first part and the second part, so that the second thin grid line can be prevented from being penetrated during welding a welding strip; the width R of the fifth surface is larger than the width S of the seventh surface, so that the contact area of the main grid and the second thin grid line is increased, namely the length of the interface between the main grid line and the second thin grid line is prolonged, and the problem of grid breakage caused by the penetration of molten tin of the welding strip along the interface between the main grid line and the second thin grid line when the welding strip is welded is improved; the width S of the seventh surface is larger than the width T of the ninth surface, namely, the eighth surface and/or the tenth surface are inclined surfaces, and part of light is reflected at the inclined surfaces and is emitted to the inside of the battery piece main body, so that the light utilization rate of the solar battery piece is improved, and the efficiency of the solar battery piece is improved.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A solar cell, comprising:
the battery piece main body comprises a first surface and a second surface which are oppositely arranged along a first direction, wherein the first surface is provided with first thin grid lines which are distributed along a second direction and extend along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the second surface is provided with second fine grid lines which are distributed along the second direction and extend in the third direction;
the second thin grid line comprises a first part extending along the third direction, the first part comprises a third surface, a fourth surface, a fifth surface and a sixth surface which are sequentially connected end to end, the third surface and the fifth surface are oppositely arranged along the first direction, the fourth surface and the sixth surface are oppositely arranged along the second direction, and the third surface is connected with the second surface;
the second thin grid line further comprises a second portion extending along the third direction, the second portion comprises a seventh surface, an eighth surface, a ninth surface and a tenth surface which are sequentially connected end to end, the seventh surface and the ninth surface are oppositely arranged along the first direction, the eighth surface and the tenth surface are oppositely arranged along the second direction, the seventh surface is connected with the fifth surface, the width of the fifth surface is R along the second direction, the width of the seventh surface is S, and the width of the ninth surface is T, and R > S > T.
2. The solar cell according to claim 1, wherein the fifth surface is provided with a solder resist portion extending in the third direction, and an orthographic projection of the solder resist portion on the cell body and an orthographic projection of the second portion on the cell body do not overlap.
3. The solar cell according to claim 1, wherein the third surface has a length U > R along the second direction.
4. The solar cell according to claim 1, wherein the length of the third surface in the second direction is U, U = R;
the fourth surface is an arc surface protruding towards one side far away from the sixth surface, and/or the sixth surface is an arc surface protruding towards one side far away from the fourth surface.
5. The solar cell according to claim 1, wherein the third surface has a length U in the second direction, and the first thin grid line has a width V, U > V.
6. The solar cell of claim 1, wherein the first thin-grid line comprises an eleventh surface, a twelfth surface, a thirteenth surface, and a fourteenth surface that are connected end to end, the eleventh surface and the thirteenth surface being disposed opposite each other in the first direction, the twelfth surface and the fourteenth surface being disposed opposite each other in the second direction, the eleventh surface being connected to the first surface, the thirteenth surface being provided with at least one groove extending in the second direction through the twelfth surface and the fourteenth surface;
the groove is provided with an inclined plane.
7. The solar cell according to claim 6, wherein a cross section is taken in a direction perpendicular to a plane in which the cell body is located, the cross section extending in the third direction, and the groove is triangular or trapezoidal in shape in the cross section.
8. The solar cell according to claim 1, wherein two adjacent first thin-grid lines are between the orthographic projections of the cell body, and at least one second thin-grid line is included in the orthographic projection of the cell body.
9. The solar cell according to claim 8, wherein a distance between adjacent first thin grid lines in the second direction is D, and a minimum distance from an orthographic projection of the second thin grid line on the cell body to an orthographic projection of the first thin grid line on the cell body is L, and D/5 is L is D/2.
10. A photovoltaic module comprising the solar cell of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310165632.2A CN116154010A (en) | 2023-02-10 | 2023-02-10 | Solar cell and photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310165632.2A CN116154010A (en) | 2023-02-10 | 2023-02-10 | Solar cell and photovoltaic module |
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| Publication Number | Publication Date |
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| CN116154010A true CN116154010A (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310165632.2A Pending CN116154010A (en) | 2023-02-10 | 2023-02-10 | Solar cell and photovoltaic module |
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| Country | Link |
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| CN (1) | CN116154010A (en) |
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