CN114361266A - Photovoltaic module - Google Patents
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- CN114361266A CN114361266A CN202011042043.8A CN202011042043A CN114361266A CN 114361266 A CN114361266 A CN 114361266A CN 202011042043 A CN202011042043 A CN 202011042043A CN 114361266 A CN114361266 A CN 114361266A
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- 229910021389 graphene Inorganic materials 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
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- 239000007788 liquid Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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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 invention discloses a photovoltaic module, which comprises: the solar cell comprises a plurality of cell pieces, wherein a plurality of grid lines are arranged on each cell piece at intervals, a plurality of doping regions are arranged in each cell piece at intervals, the doping regions are arranged at intervals along the length direction of the grid lines and extend along the arrangement direction of the grid lines, the doping concentration of each doping region is C, and C satisfies the following conditions: c > 4X 1020cm‑3(ii) a The first battery piece and the second battery piece are connected through the interconnection structural member, and the grid lines of the first battery piece and the grid lines of the second battery piece are electrically connected through at least one interconnection structural member. According to the photovoltaic module, the output power and the reliability of the photovoltaic module can be effectively improved, and the cost can be reduced.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module.
Background
In the related art, under the background of increasingly serious energy crisis and environmental pollution, photovoltaic power generation is increasingly favored by governments of various countries as a green and environment-friendly renewable energy source. The photovoltaic module is a core part of a photovoltaic power generation system, and for the photovoltaic module, the output power is the capacity of the photovoltaic module to convert solar energy into electric energy. However, the output power of the photovoltaic module is generally low and the reliability is low.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the invention to provide a photovoltaic module which has a high output and reliability and is low in cost.
A photovoltaic module according to an embodiment of the present invention includes: each cell piece is provided with a plurality of grid lines arranged at intervals, each cell piece is internally provided with a plurality of doping regions arranged at intervals, the doping regions are arranged at intervals along the length direction of the grid lines and extend along the direction perpendicular to the grid lines, and the doping concentration of each doping region is C, wherein C satisfies the following conditions: c > 4X 1020cm-3(ii) a A plurality of interconnection structure spare, two adjacent battery pieces are first battery piece and second battery piece respectively, first battery piece with the second battery piece passes through interconnection structure spare links to each other, a plurality of first battery piece a plurality ofThe grid lines and the plurality of grid lines of the second battery piece are electrically connected through at least one interconnection structural member.
According to the photovoltaic module provided by the embodiment of the invention, the grid lines are arranged on each cell slice at intervals, the doping regions which are arranged at intervals along the length direction of the grid lines and extend along the direction vertical to the grid lines are arranged in each cell slice, and the doping concentration C of each doping region meets the condition that C is more than 4 multiplied by 1020cm-3On one hand, the doping region can effectively collect the current generated by the cell and can transfer the current generated by the cell to the plurality of grid lines; on the other hand, the plurality of grid lines and the plurality of doping regions arranged in this way can reduce the shielding area of the cell, so that the output power and the reliability of the photovoltaic module can be effectively improved, and the cost can be reduced.
According to some embodiments of the invention, each of the doped regions is a graphene doped region or a phosphorus doped region.
According to some embodiments of the invention, a minimum distance between each doped region and the front surface of the corresponding cell piece is d, wherein d satisfies: d is more than or equal to 3 mu m and less than or equal to 5 mu m.
According to some embodiments of the invention, each of the doped regions has a thickness t1Wherein, the t1Satisfies the following conditions: t is not less than 8 mu m1≤12μm。
According to some embodiments of the invention, each of the doped regions has a width w1Wherein, the w1Satisfies the following conditions: w is more than or equal to 60 mu m1≤70μm。
According to some embodiments of the invention, the plurality of interconnection structures include a plurality of first interconnection structures, the plurality of grid lines on the front surface of the first cell piece and the plurality of grid lines on the back surface of the second cell piece are electrically connected through the plurality of first interconnection structures, the plurality of first interconnection structures correspond to the plurality of grid lines one by one, one end of each first interconnection structure is electrically connected to the end of the grid line corresponding to the front surface of the first cell piece, and the other end of each first interconnection structure is electrically connected to the grid line corresponding to the back surface of the second cell piece.
According to some embodiments of the invention, the plurality of interconnection structures comprises a plurality of second interconnection structures, all of the grid lines of the front surface of the first cell piece and all of the grid lines of the back surface of the second cell piece are electrically connected through one second interconnection structure, and one end of the second interconnection structure is electrically connected with the end portions of all of the grid lines of the front surface of the first cell piece.
According to some embodiments of the invention, the connection length of each interconnection structure member to the front surface of the first battery piece along the length direction of the grid line is L1Each of the interconnection structural members has a connection length L with the back surface of the second cell sheet2Wherein, said L1、L2Satisfies the following conditions: l is not less than 3mm1≤5mm，L2≥3mm。
According to some embodiments of the invention, each of the interconnecting structural members has a rectangular cross-sectional shape.
According to some embodiments of the invention, each of the interconnect structures has a thickness t2Wherein, the t2Satisfies the following conditions: t is not less than 0.1mm2≤0.26mm。
According to some embodiments of the invention, the number of the grid lines on each of the battery pieces is N, where N satisfies: n is more than or equal to 9 and less than or equal to 18.
According to some embodiments of the invention, each of the gate lines has a width w2Wherein, the w2Satisfies the following conditions: w is not less than 0.1mm2≤0.2mm。
According to some embodiments of the invention, the first cell piece and the second cell piece are located in the same plane or end lap jointed.
According to some embodiments of the invention, when the first cell piece and the second cell piece are located in the same plane, a gap between the first cell piece and the second cell piece is s, wherein s satisfies: s is more than or equal to 0.5mm and less than or equal to 2.5 mm; when the end parts of the first battery piece and the second battery piece are lapped, the width of the lapped part of the end parts of the first battery piece and the second battery piece is W3WhereinW is as described3Satisfies the following conditions: w is not less than 0.5mm3≤1.8mm。
According to some embodiments of the present invention, each of the battery pieces is formed by cutting a complete battery piece along the arrangement direction of the plurality of grid lines, and a ratio of a width of the battery piece to a width of the complete battery piece is X, where X satisfies: x is not less than 1/6 and not more than 1.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of the connection of two adjacent cells of a photovoltaic module according to an embodiment of the present invention;
fig. 2 is a schematic view of the connection of two adjacent cells of a photovoltaic module according to another embodiment of the present invention;
FIG. 3 is a partial schematic view of a cell sheet of a photovoltaic module according to an embodiment of the present invention;
fig. 4 is a schematic partial cross-sectional view of a cell sheet of a photovoltaic module according to an embodiment of the invention.
Reference numerals:
1: a battery piece; 11: a gate line; 12: a doped region; 2: an interconnecting structural member;
21: a first interconnecting structural member; 22: a second interconnecting structural member.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A photovoltaic module according to an embodiment of the present invention is described below with reference to fig. 1 to 4.
As shown in fig. 1 and 2, a photovoltaic module according to an embodiment of the present invention includes a plurality of cells 1 and a plurality of interconnected structural members 2. In the description of the present invention, "a plurality" means two or more.
Specifically, be equipped with a plurality of grid lines 11 that the interval set up on every battery piece 1, and be equipped with a plurality of doped regions 12 that the interval set up in every battery piece 1, a plurality of doped regions 12 are arranged along the length direction interval of grid line 11, and every doped region 12 extends along the direction of a plurality of grid lines 11 of perpendicular to, and the doping concentration of every doped region 12 is C, and wherein C satisfies: c > 4X 1020cm-3. Specifically, for example, when C.ltoreq.4X 1020cm-3In the meantime, the doping concentration of the doping region 12 is too low to effectively collect the cells generated by the photovoltaic effect of the cell sheet 1 and transmit the cells to the plurality of gate lines 11, thereby affecting the output power of the photovoltaic module. Thus, by making the doping concentration C of each doped region 12 satisfy: c > 4X 1020cm-3The doping concentration of the doping region 12 is high, so that the current generated by the cell 1 can be effectively collected, the current generated by the cell 1 can be transmitted to the grid lines 11, and the output power and the reliability of the photovoltaic module are improved. Moreover, the plurality of grid lines 11 arranged at intervals along the same direction are only arranged on the cell piece 1, and the auxiliary grid lines are not arranged in the direction perpendicular to the plurality of grid lines 11, so that the shielding of the grid lines on the effective area of the cell piece 1 can be reduced, the output power of the photovoltaic module can be further improved, and the material cost can be reduced. Alternatively, each gate line 11 may be made of silver paste or graphene. But is not limited thereto.
Two adjacent battery pieces 1 are respectively a first battery piece and a second battery piece, the first battery piece and the second battery piece are connected through an interconnection structural member 2, and a plurality of grid lines 11 of the first battery piece and a plurality of grid lines 11 of the second battery piece are electrically connected through at least one interconnection structural member 2. Thus, by providing the interconnection structure 2 as described above, the current collected by the plurality of grid lines 11 can be transmitted to the interconnection structure 2, so that the series connection between two adjacent battery cells 1 can be realized. Wherein the interconnecting structural member 2 may be a flexible piece of metallic material. It should be noted that the above-mentioned "flexible metal material" should be understood in a broad sense in this application, and refers to a metal material having a relatively better ability to respond to deformation than a "rigid metal material", such as copper, aluminum, and the like.
According to the photovoltaic module of the embodiment of the invention, a plurality of grid lines 11 spaced apart from each other are arranged on each cell slice 1, a plurality of doping regions 12 are arranged in each cell slice 1 at intervals along the length direction of the grid lines 11 and extend along the direction vertical to the grid lines 11, and the doping concentration C of each doping region 12 satisfies C > 4 x 1020cm-3On the one hand, the doped region 12 can effectively collect the current generated by the cell sheet 1 and can transfer the current generated by the cell sheet 1 to the plurality of grid lines 11; on the other hand, the plurality of gate lines 11 and the plurality of doping regions 12 are not provided with secondary gate lines, and compared with a conventional battery, the shielding area of the battery piece 1 can be reduced, so that the output power and the reliability of the photovoltaic module can be effectively improved, and the cost can be reduced.
In some alternative embodiments of the present invention, each doped region 12 may be a graphene doped region. For example, the graphene doped region may be formed by laser doping. Therefore, the graphene has excellent conductivity, so that the resistance can be reduced, the current density can be improved, the current generated by the cell 1 through the photovoltaic effect can be better transmitted to the plurality of grid lines 11, and the output power and the reliability of the photovoltaic module can be further ensured. Of course, the invention is not limited thereto, and in other embodiments of the invention, each doped region 12 may also be a phosphorus doped region. It will be appreciated that the doping material of each doped region 12 may be specifically determined according to actual requirements to better meet the actual application.
In some embodiments of the present invention, the minimum distance between each doped region 12 and the front surface (i.e., the upper surface of the light receiving surface) of the corresponding cell 1 is d, where d satisfies: d is more than or equal to 3 mu m and less than or equal to 5 mu m. Thus, by making d satisfy: d is more than or equal to 3 mu m and less than or equal to 5 mu m, and the minimum distance between the doping region 12 and the front surface of the cell 1 is reasonable, so that the current can be better collected and transmitted to the grid lines 11, and the photovoltaic module is ensured to have higher output power.
In some alternative embodiments of the present invention, each doped region 12 has a thickness t1Wherein, t1Satisfies the following conditions: t is not less than 8 mu m1Less than or equal to 12 mu m. Specifically, for example, when t1When the thickness of each doping region 12 is smaller than 8 μm, the current of the cell 1 cannot be effectively collected and transmitted to the plurality of grid lines 11, and the output of the current may be affected; when t is1With a thickness of > 12 μm, the thickness of each doped region 12 is too large, which increases the material costs of the entire photovoltaic module. Thereby, by making t1Satisfies the following conditions: t is not less than 8 mu m1Less than or equal to 12 microns, and the thickness of each doped region 12 is reasonable, so that the doped regions 12 have higher current collection and current transmission capabilities, and the cost can be further reduced while the photovoltaic module is ensured to have higher output power. In addition, the doping area 12 arranged in this way can increase the front illumination area of the cell 1, improve the current collection capability, reduce the resistance, improve the power of the current and the photovoltaic module, and can avoid the arrangement of auxiliary grid lines, thereby saving the use amount of silver paste and reducing the cost.
In some alternative embodiments of the present invention, each doped region 12 has a width w1Wherein w is1Satisfies the following conditions: w is more than or equal to 60 mu m1Less than or equal to 70 mu m. For example, when w1When the thickness is less than 60 micrometers, the width of each doping region 12 is too small, so that the current of the cell 1 cannot be effectively collected and transmitted to the plurality of grid lines 11, and the output of the current is affected; when w is1At > 70 μm, the width of each doped region 12 is too large, which increases the material cost of the entire photovoltaic module. Thereby, by making w1Satisfies the following conditions: w is more than or equal to 60 mu m1Less than or equal to 70 mu m, and the width of each doping area 12 is reasonable, so that the doping areas 12 have higher current collection capability and current conduction capability, and the cost of the photovoltaic module can be effectively reduced while the output power of the photovoltaic module is ensured. In addition, the doping area 12 arranged in this way can also increase the illumination area of the front side of the cell 1, improve the current collection capability, reduce the resistance, improve the power of the current and the photovoltaic module, and enable the photovoltaic module to be free from arranging auxiliary grid lines, so that the use amount of silver paste can be saved, and the cost is reduced.
In some embodiments of the present invention, referring to fig. 1, the plurality of interconnection structures 2 includes a plurality of first interconnection structures 21, the plurality of grid lines 11 on the front surface of the first cell and the plurality of grid lines 11 on the back surface of the second cell are electrically connected through the plurality of first interconnection structures 21, the plurality of first interconnection structures 21 correspond to the plurality of grid lines 11 one by one, one end of each first interconnection structure 21 is electrically connected to an end portion of the grid line 11 corresponding to the front surface of the first cell, and the other end of each first interconnection structure 21 is electrically connected to the grid line 11 corresponding to the back surface of the second cell.
For example, in the example of fig. 1, each cell sheet 1 is provided with nine grid lines 11 uniformly spaced along the length direction of the cell sheet 1, the nine grid lines 11 are parallel to each other, and each grid line 11 extends along the width direction of the cell sheet 1. The number of the first interconnection structural members 21 between the first cell piece and the second cell piece is also nine, the nine first interconnection structural members 21 are arranged at intervals along the arrangement direction of the nine grid lines 11, and each first interconnection structural member 21 extends along the length direction of the grid line 11. Since the doped regions 12 can effectively collect and transfer current to the gate lines 11, the first interconnection structure 21 only needs to be connected to the end portions of the gate lines 11 corresponding to the front surface of the first cell. Therefore, by arranging the plurality of first interconnection structural members 21, the connection length between the plurality of first interconnection structural members 21 and the front surface of the cell 1 is short, and compared with the existing photovoltaic module, the connection length can effectively reduce the shielding area on the front surface of the cell 1, and can reduce the resistance, so that the output power of the photovoltaic module can be further improved. Moreover, by the arrangement, the first interconnection structural member 21 can be prevented from being welded with the grid lines 11 on the front surface of the first cell, and the material of the first interconnection structural member 21 is less, so that the cost of the photovoltaic module can be further reduced.
Nine gate lines 11 and nine first interconnect structures 21 are shown in fig. 1 for illustrative purposes, but it will be apparent to those skilled in the art after reading the present disclosure that the present disclosure may be applied to other numbers of gate lines 11 and first interconnect structures 21 without departing from the scope of the present disclosure.
In other embodiments of the present invention, referring to fig. 2, the plurality of interconnect structures 2 includes a plurality of second interconnect structures 22, all grid lines 11 on the front surface of the first cell sheet and all grid lines 11 on the back surface of the second cell sheet are electrically connected through one second interconnect structure 22, and one end of the second interconnect structure 22 is electrically connected to the end of all grid lines 11 on the front surface of the first cell sheet. For example, in the example of fig. 2, each cell sheet 1 is provided with nine grid lines 11 that are uniformly spaced along the length direction of the cell sheet 1 and are parallel to each other, the second interconnection structure 22 extends along the arrangement direction of the nine grid lines 11, and the second interconnection structure 22 is perpendicular to the nine grid lines 11. One side surface of the second interconnection structure member 22 is electrically connected with the end portions of the nine grid lines 11 on the front surface of the first cell, and the other side surface of the second interconnection structure member 22 is electrically connected with all the grid lines 11 on the back surface of the second cell, so that the series connection between the first cell and the second cell is realized. Therefore, by arranging the second interconnection structural member 22, the connection length of the second interconnection structural member 22 and the front surface of the cell 1 is also shorter, so that the shielding area of the front surface of the cell 1 can be effectively reduced, the resistance is reduced, the output power of the photovoltaic module is improved, the material consumption of the second interconnection structural member 22 is also less, and the cost of the photovoltaic module can be reduced. In addition, the second interconnection structure 22 can be electrically connected with all the grid lines 11 of the corresponding cell 1 at the same time, so that the structure is simple, and the processing efficiency of the photovoltaic module can be effectively improved.
In some embodiments of the present invention, the connection length of each interconnection structure 2 to the front surface of the first cell along the length direction of the grid lines 11 is L1Each interconnecting structural member 2 is connected to the back side of the second cell sheet by a length L2Wherein L is1、L2Satisfies the following conditions: l is not less than 3mm1≤5mm，L2Not less than 3 mm. Specifically, for example, when L1When the thickness is less than 3mm, the connection length between each interconnection structural part 2 and the front surface of the first battery piece is too short, so that cold joint can be caused, and the welding firmness is influenced; when L is1When the thickness is more than 5mm, the connection length between each interconnection structural member 2 and the front surface of the first battery piece is too long, so that the shielding area of the front surface of the first battery piece can be increased, and the current conversion efficiency of the first battery piece is influenced. Similarly, when L is2If the thickness is less than 3mm, the connection length of each interconnection structure 2 to the back surface of the second cell sheet is too short, which may result in cold joint and poor reliability.Thereby, by making L1、L2Satisfies the following conditions: l is not less than 3mm1≤5mm，L2The thickness of the first cell is larger than or equal to 3mm, the firm connection between the interconnection structural member 2 and the first cell and between the interconnection structural member and the second cell is guaranteed, meanwhile, the shielding area of the front face of the first cell can be effectively reduced, the current conversion efficiency of the first cell is improved, and therefore the output power of the photovoltaic module is further improved.
Alternatively, the cross-sectional shape of each interconnecting structural member 2 may be rectangular. According to the arrangement, the thickness of each interconnection structural part 2 is small, and when the interconnection structural parts 2 are welded with the grid lines 11 of the cell pieces 1, the risk of hidden cracking of the cell pieces 1 can be effectively reduced, so that the output power and the reliability of the photovoltaic module can be improved, and the service life of the photovoltaic module can be prolonged. Moreover, the welding area of the interconnection structural member 2 and the battery piece 1 is large, so that the welding tension can be improved, the welding firmness of the interconnection structural member 2 and the battery piece 1 is ensured, and the false welding is avoided.
Optionally, each interconnecting structural member 2 has a thickness t2Wherein, t2Satisfies the following conditions: t is not less than 0.1mm2Less than or equal to 0.26 mm. Therefore, the thickness of each interconnection structural member 2 is reasonable, firm connection with the grid lines 11 on the cell piece 1 is guaranteed, meanwhile, the risk of hidden cracking of the cell piece 1 can be effectively reduced, and therefore the long-term reliability of the photovoltaic module can be further improved.
In some embodiments of the present invention, the number of the grid lines 11 on each cell 1 is N, where N satisfies: n is more than or equal to 9 and less than or equal to 18. Specifically, for example, when N < 9, the number of grid lines 11 on each cell sheet 1 is too small, the current generated by the cell sheet 1 through the photovoltaic effect may not be effectively guided, and the connection between the interconnection structure 2 and the cell sheet 1 may be affected; when N > 18, the number of the grid lines 11 on each cell 1 is too large, which may result in too large shielding area for the cell 1 and increase the usage amount of silver paste, thereby increasing the cost. Thus, by making N satisfy: n is more than or equal to 9 and less than or equal to 18, the plurality of grid lines 11 can effectively guide the current generated by the cell 1, the shielding of the cell 1 can be reduced, and the photovoltaic module is ensured to have higher output power.
In some alternative embodiments of the present invention, each gate line 11 has a width w2Wherein w is2Satisfies the following conditions: w is not less than 0.1mm2Less than or equal to 0.2 mm. For example, when w2When the width of each grid line 11 is less than 0.1mm, the collection of current may be affected, and thus the current collected by the doped region 12 may not be effectively transferred to the interconnection structural member 2, which affects the current output; when w is2When > 0.2mm, the width of every grid line 11 is too big, can increase the use amount of silver thick liquid to improve the cost of battery piece 1, and can increase the area of sheltering from to battery piece 1, probably influence photovoltaic module's output. Thereby, by making w2Satisfies the following conditions: w is not less than 0.1mm2Be less than or equal to 0.2mm, when guaranteeing that a plurality of grid lines 11 can effectively conduct the electric current that doping region 12 gathers to interconnect structure 2, can reduce the use amount of silver thick liquid to can reduce cost. Moreover, the shielding area of the cell 1 can be reduced, thereby improving the output power of the photovoltaic module.
In some alternative embodiments of the present invention, as shown in fig. 1 and 2, the first cell piece and the second cell piece may be located in the same plane. So set up, photovoltaic module is the photovoltaic module of piece mode, compares with conventional photovoltaic module, can reduce photovoltaic module's minor face size, can reduce the difficulty of glass processing procedure when cell 1's size is great, reduces the risk that photovoltaic module load takes off the frame.
Further, when the first battery piece and the second battery piece are located in the same plane, the gap between the first battery piece and the second battery piece is s, wherein s satisfies: s is more than or equal to 0.5mm and less than or equal to 2.5 mm. Specifically, for example, when s < 0.5mm, the gap between two adjacent cells 1 is too small, which may result in high fragmentation rate of the cells 1, decrease the reliability of the photovoltaic module, and be unfavorable for heat dissipation of the cells 1; when s > 2.5mm, the gap between two adjacent cells 1 is too large, which may reduce the power density per unit area of the photovoltaic module, make the size of the photovoltaic module too large, and reduce the packaging efficiency of the photovoltaic module. Thus, by letting s satisfy: s is not less than 0.5mm and not more than 2.5mm, so that the structure of the photovoltaic module is more compact, the power density of the unit area of the photovoltaic module and the packaging efficiency of the photovoltaic module can be improved, and the reliability of the photovoltaic module is higher. For example, s may be 0.5 mm. Like this, can increase the solar light transmissivity between two adjacent battery slices 1, and can improve battery slice 1's radiating effect, reduce photovoltaic module's temperature, guarantee that photovoltaic module has higher output.
Of course, the invention is not limited thereto, and in other embodiments of the invention, the first cell piece and the second cell piece are overlapped at the end portions (not shown). Therefore, through the arrangement, more battery plates 1 can be stacked in unit area, and the power generation power and the stability of the photovoltaic module are improved. Moreover, with this arrangement, the size of the photovoltaic module can be further reduced.
In a further embodiment of the present invention, when the first cell piece and the second cell piece are overlapped at the end portion, the width of the overlapped portion of the end portions of the first cell piece and the second cell piece is W3Wherein W is3Satisfies the following conditions: w is not less than 0.5mm3Less than or equal to 1.8 mm. Therefore, when the density of the cell pieces 1 of the photovoltaic module is improved, the shielding between two adjacent cell pieces 1 can be reduced, and the light utilization rate of the cell pieces 1 can be improved.
In some embodiments of the present invention, each cell 1 is formed by cutting a complete cell along the arrangement direction of the plurality of grid lines 11, and the ratio of the width of the cell 1 to the width of the complete cell is X, where X satisfies: x is not less than 1/6 and not more than 1. For example, the complete battery piece can be equally divided by 1 to 6 parts (including end points) in a direction perpendicular to the grid lines 11 by laser scribing, and the number of the grid lines 11 on each battery piece 1 after cutting is equal to the number of the grid lines 11 of the complete battery piece (for example, nine). When the complete battery piece is square, the ratio of the width of the battery piece 1 to the width of the complete battery piece is the ratio of the width to the length of the cut battery piece 1, and may be, for example, 1: 2. 1: 3. 1: 4. 1: 5 or 1: 6, and the like. So, through carrying out the section processing to complete battery piece, can effectively reduce photovoltaic module's internal current to can bring lower power loss, reduce the single cost of watt.
Optionally, the photovoltaic module may include a front transparent plate, a front encapsulant film, a solar cell module, a back encapsulant film, and a back cover plate. The solar cell module includes a plurality of cells 1. When the photovoltaic module is manufactured, the front transparent plate, the front packaging adhesive film, the solar cell module, the back packaging adhesive film and the back cover plate are sequentially placed so as to complete preparation work before lamination of the photovoltaic module. And then, after vacuumizing and heating lamination is carried out on the laminated five-layer structure comprising the front transparent plate, the front packaging adhesive film, the solar cell module, the back packaging adhesive film and the back cover plate, the front packaging adhesive film and the back packaging adhesive film are crosslinked and cured to protect the solar cell module, firm bonding of the five-layer structure (namely the front transparent plate, the front packaging adhesive film, the solar cell module, the back packaging adhesive film and the back cover plate) is finally realized, and the photovoltaic module is manufactured by additionally installing an aluminum alloy frame, a junction box and sealing by adopting silica gel.
Other constructions and operations of photovoltaic modules according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (15)
1. A photovoltaic module, comprising:
each cell piece is provided with a plurality of grid lines arranged at intervals, each cell piece is internally provided with a plurality of doping regions arranged at intervals, the doping regions are arranged at intervals along the length direction of the grid lines and extend along the direction perpendicular to the grid lines, and the doping concentration of each doping region is C, wherein C satisfies the following conditions: c > 4X 1020cm-3；
The first battery piece and the second battery piece are connected through the interconnection structural member, and the grid lines of the first battery piece and the grid lines of the second battery piece are electrically connected through at least one interconnection structural member.
2. The photovoltaic module of claim 1, wherein each of the doped regions is a graphene doped region or a phosphorus doped region.
3. The photovoltaic module of claim 1, wherein the minimum distance between each doped region and the front surface of the corresponding cell piece is d, wherein d satisfies: d is more than or equal to 3 mu m and less than or equal to 5 mu m.
4. The photovoltaic module of claim 1, wherein each of the doped regions has a thickness t1Wherein, the t1Satisfies the following conditions: t is not less than 8 mu m1≤12μm。
5. The photovoltaic module of claim 1 wherein each of the doped regions has a width w1Wherein, the w1Satisfies the following conditions: w is more than or equal to 60 mu m1≤70μm。
6. The photovoltaic module according to any one of claims 1 to 5, wherein the plurality of interconnection structures comprise a plurality of first interconnection structures, the plurality of grid lines on the front surface of the first cell sheet and the plurality of grid lines on the back surface of the second cell sheet are electrically connected through the plurality of first interconnection structures, the plurality of first interconnection structures correspond to the plurality of grid lines one to one, one end of each first interconnection structure is electrically connected to the end portion of the grid line corresponding to the front surface of the first cell sheet, and the other end of each first interconnection structure is electrically connected to the grid line corresponding to the back surface of the second cell sheet.
7. The photovoltaic module of any of claims 1-5, wherein the plurality of interconnecting structures comprises a plurality of second interconnecting structures, wherein all of the grid lines on the front side of the first cell sheet and all of the grid lines on the back side of the second cell sheet are electrically connected by one of the second interconnecting structures, and wherein one end of the second interconnecting structure is electrically connected to the end portions of all of the grid lines on the front side of the first cell sheet.
8. The photovoltaic module of any of claims 1-5, wherein the length of the connection between each of the interconnecting structural members and the front surface of the first cell piece along the length of the grid line is L1Each of the interconnection structural members has a connection length L with the back surface of the second cell sheet2Wherein, said L1、L2Satisfies the following conditions: l is not less than 3mm1≤5mm，L2≥3mm。
9. The photovoltaic assembly of any of claims 1-5, wherein each of the interconnecting structural members is rectangular in cross-sectional shape.
10. The photovoltaic assembly of any of claims 1-5, wherein each of the interconnecting structural members has a thickness t2Wherein, the t2Satisfies the following conditions: t is not less than 0.1mm2≤0.26mm。
11. The photovoltaic module of any one of claims 1-5, wherein the number of grid lines on each cell is N, wherein N satisfies: n is more than or equal to 9 and less than or equal to 18.
12. The photovoltaic module of any one of claims 1-5 wherein each of the grid lines has a width w2Wherein, the w2Satisfies the following conditions: w is not less than 0.1mm2≤0.2mm。
13. The photovoltaic module of any of claims 1-5 wherein the first cell piece and the second cell piece are in the same plane or overlap at the ends.
14. The photovoltaic module of claim 13, wherein when the first cell piece and the second cell piece are in the same plane, a gap between the first cell piece and the second cell piece is s, wherein s satisfies: s is more than or equal to 0.5mm and less than or equal to 2.5 mm;
when the end parts of the first battery piece and the second battery piece are lapped, the width of the lapped part of the end parts of the first battery piece and the second battery piece is W3Wherein, the W3Satisfies the following conditions: w is not less than 0.5mm3≤1.8mm。
15. The photovoltaic module according to any one of claims 1 to 5, wherein each of the cell pieces is a complete cell piece cut along the arrangement direction of the plurality of grid lines, and the ratio of the width of the cell piece to the width of the complete cell piece is X, where X satisfies: x is not less than 1/6 and not more than 1.
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545771A (en) * | 2008-03-26 | 2009-09-30 | 三星电子株式会社 | Distance measuring sensors and three-dimensional color image sensors |
| US20120012173A1 (en) * | 2010-07-19 | 2012-01-19 | Samsung Electronics Co., Ltd. | Solar cell and method for manufacturing the same |
| CN104064609A (en) * | 2014-05-30 | 2014-09-24 | 晶澳（扬州）太阳能科技有限公司 | Back contact solar cell component and preparation method thereof |
| CN104269454A (en) * | 2014-09-28 | 2015-01-07 | 苏州中来光伏新材股份有限公司 | High-efficiency back contact solar cell back sheet without main grids, high-efficiency back contact solar cell assembly without main grids and manufacturing technology |
| JP2016111357A (en) * | 2014-12-09 | 2016-06-20 | 三菱電機株式会社 | Solar battery, solar battery module, and method of manufacturing solar battery |
| CN106129175A (en) * | 2016-07-12 | 2016-11-16 | 李会欣 | The preparation method of photovoltaic cell |
| CN106158990A (en) * | 2016-07-21 | 2016-11-23 | 英利能源（中国）有限公司 | IBC battery, set of cells and preparation method |
| CN106298987A (en) * | 2016-09-30 | 2017-01-04 | 晶澳（扬州）太阳能科技有限公司 | A kind of MWT solar module |
| WO2017026016A1 (en) * | 2015-08-07 | 2017-02-16 | 三菱電機株式会社 | Solar battery cell and method for fabricating solar battery cell |
| CN106653912A (en) * | 2017-01-22 | 2017-05-10 | 晶澳（扬州）太阳能科技有限公司 | Grid line-free full-back contact solar cell module |
| CN107195702A (en) * | 2017-05-19 | 2017-09-22 | 晶澳（扬州）太阳能科技有限公司 | It is a kind of new without the full back contact solar cell piece of grid line |
| CN206976357U (en) * | 2017-05-19 | 2018-02-06 | 晶澳（扬州）太阳能科技有限公司 | A kind of full back contact solar cell piece of new no grid line and utilize its manufactured battery component |
| US20190326415A1 (en) * | 2018-04-24 | 2019-10-24 | Shanghai Huahong Grace Semiconductor Manufacturing Corporation | Semiconductor structure and method for manufacturing the same |
| CN110828586A (en) * | 2019-11-29 | 2020-02-21 | 通威太阳能（合肥）有限公司 | Crystalline silicon battery, photovoltaic module and photovoltaic power generation system |
| CN111477702A (en) * | 2020-05-21 | 2020-07-31 | 晶澳太阳能有限公司 | Back contact solar cell module and preparation method thereof |
| CN111613678A (en) * | 2019-02-25 | 2020-09-01 | 泰州隆基乐叶光伏科技有限公司 | Solar cell structure |
-
2020
- 2020-09-28 CN CN202011042043.8A patent/CN114361266B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545771A (en) * | 2008-03-26 | 2009-09-30 | 三星电子株式会社 | Distance measuring sensors and three-dimensional color image sensors |
| US20120012173A1 (en) * | 2010-07-19 | 2012-01-19 | Samsung Electronics Co., Ltd. | Solar cell and method for manufacturing the same |
| CN104064609A (en) * | 2014-05-30 | 2014-09-24 | 晶澳（扬州）太阳能科技有限公司 | Back contact solar cell component and preparation method thereof |
| CN104269454A (en) * | 2014-09-28 | 2015-01-07 | 苏州中来光伏新材股份有限公司 | High-efficiency back contact solar cell back sheet without main grids, high-efficiency back contact solar cell assembly without main grids and manufacturing technology |
| JP2016111357A (en) * | 2014-12-09 | 2016-06-20 | 三菱電機株式会社 | Solar battery, solar battery module, and method of manufacturing solar battery |
| WO2017026016A1 (en) * | 2015-08-07 | 2017-02-16 | 三菱電機株式会社 | Solar battery cell and method for fabricating solar battery cell |
| CN106129175A (en) * | 2016-07-12 | 2016-11-16 | 李会欣 | The preparation method of photovoltaic cell |
| CN106158990A (en) * | 2016-07-21 | 2016-11-23 | 英利能源（中国）有限公司 | IBC battery, set of cells and preparation method |
| CN106298987A (en) * | 2016-09-30 | 2017-01-04 | 晶澳（扬州）太阳能科技有限公司 | A kind of MWT solar module |
| CN106653912A (en) * | 2017-01-22 | 2017-05-10 | 晶澳（扬州）太阳能科技有限公司 | Grid line-free full-back contact solar cell module |
| CN107195702A (en) * | 2017-05-19 | 2017-09-22 | 晶澳（扬州）太阳能科技有限公司 | It is a kind of new without the full back contact solar cell piece of grid line |
| CN206976357U (en) * | 2017-05-19 | 2018-02-06 | 晶澳（扬州）太阳能科技有限公司 | A kind of full back contact solar cell piece of new no grid line and utilize its manufactured battery component |
| US20190326415A1 (en) * | 2018-04-24 | 2019-10-24 | Shanghai Huahong Grace Semiconductor Manufacturing Corporation | Semiconductor structure and method for manufacturing the same |
| CN111613678A (en) * | 2019-02-25 | 2020-09-01 | 泰州隆基乐叶光伏科技有限公司 | Solar cell structure |
| CN110828586A (en) * | 2019-11-29 | 2020-02-21 | 通威太阳能（合肥）有限公司 | Crystalline silicon battery, photovoltaic module and photovoltaic power generation system |
| CN111477702A (en) * | 2020-05-21 | 2020-07-31 | 晶澳太阳能有限公司 | Back contact solar cell module and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘彩凤;: "太阳能电池栅线电性能与印制品质的关联模型", 压电与声光, no. 02, pages 147 - 151 * |
| 高华;黄其煜;: "高方阻密栅电池发射结方阻的优化", 光电技术应用, no. 01, pages 22 - 28 * |
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