CN218730966U - Solar cell and solar cell module - Google Patents
Solar cell and solar cell module Download PDFInfo
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- CN218730966U CN218730966U CN202221964394.9U CN202221964394U CN218730966U CN 218730966 U CN218730966 U CN 218730966U CN 202221964394 U CN202221964394 U CN 202221964394U CN 218730966 U CN218730966 U CN 218730966U
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- 239000004065 semiconductor Substances 0.000 claims abstract description 13
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- 230000009286 beneficial effect Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 238000005476 soldering Methods 0.000 description 5
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/62—Insulating-layers or insulating-films on metal bodies
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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
- H01L31/0216—Coatings
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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
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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
- H01L31/04—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 adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The application discloses a solar cell belongs to solar cell module technical field. The semiconductor device comprises a semiconductor substrate, a connecting electrode and a fine grid electrode, wherein the connecting electrode is arranged along a first direction, the fine grid electrode is arranged along a second direction, the first direction and the second direction are crossed, the fine grid electrode is connected with the connecting electrode, the fine grid electrode and the connecting electrode with opposite polarities are separated by a first preset distance, and the connecting electrode comprises a plurality of connecting points for being connected with a conductive wire; the insulating layers are arranged between the connection points and at least cover part of the fine gate electrode which is close to the connection electrode and has opposite polarity to the connection electrode; the insulating layer extends a distance in at least one of the first direction and the second direction. The coverage area of the insulating layer is increased, the short circuit of the solar cell caused by incomplete coverage of the insulating layer of the fine grid electrode in the processing or using process is avoided, the beneficial effects of reducing the incomplete probability of the grid line of the covered electrode and preventing the short circuit of the cell caused by welding offset of the welding strip are achieved, and the quality of the cell module is improved.
Description
Technical Field
The application belongs to the technical field of photovoltaics, and particularly relates to a solar cell and a solar cell module.
Background
The back contact (IBC) solar cell is a solar cell in which the front surface of a cell does not have an electrode and both positive and negative electrodes are disposed on the back surface of the cell, so that the shielding of the electrode on the cell can be reduced, the short-circuit current of the cell can be increased, and the energy conversion efficiency of the cell can be improved.
In the prior art, the interconnection of back contact solar cell module parts mainly adopts a very mature solder strip welding interconnection mode. Because the positive and negative electrodes of the back contact solar cell are arranged on the back surface of the cell piece, the positive and negative electrodes comprise a plurality of main grid electrodes and fine grid electrodes, the first fine grids and the second fine grids are arranged in an interdigital way, when the first main grid electrode or the second main grid electrode is connected by a welding strip, the welding strip is slightly deviated and can be contacted with the opposite electrode to cause short circuit, and in order to reduce the risk of short circuit caused by deviation of the welding strip, an insulating layer is usually arranged on the surface of the cell piece to avoid the contact of the welding strip and the opposite electrode.
However, the insulating layer is prone to the situation that the battery grid lines cannot be completely covered, so that the insulation between the solder strip and the grid lines of the opposite electrode cannot be effectively realized, and the reliability of the battery assembly is seriously affected.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application aims to provide a solar cell and a solar cell module, and the problems that in the prior art, a covering electrode grid line is incomplete easily to occur in an insulating layer of the solar cell, and a short circuit is caused by welding offset of a welding strip can be solved.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a solar cell, including: the backlight module comprises a semiconductor substrate, a connecting electrode and a fine grid electrode, wherein the connecting electrode and the fine grid electrode are arranged on a backlight plate of the semiconductor substrate, the connecting electrode is arranged along a first direction, the fine grid electrode is arranged along a second direction, the first direction and the second direction are crossed, the fine grid electrode is connected with the connecting electrode, the fine grid electrode and the connecting electrode with opposite polarities are separated by a first preset distance, and the connecting electrode comprises a plurality of connecting points used for being connected with a conductive wire; a plurality of insulating layers disposed between the connection points, the insulating layers covering at least a portion of the fine gate electrode adjacent to the connection electrode and having a polarity opposite to that of the connection electrode; wherein the insulating layer extends a distance in at least one of the first direction and the second direction.
In the embodiment of the application, the fine gate electrodes are distributed on the surface of the semiconductor substrate and used for collecting the charged carriers generated on the surface of the semiconductor substrate and transmitting and collecting the collected charged carriers to the connecting electrode, namely, current is formed and collected in the fine gate electrodes and the connecting electrode. Wherein the connection electrode is disposed along a first direction, the fine gate electrode is disposed along a second direction, and the first direction and the second direction intersect. The connection electrode is connected to the fine gate electrode, and in practical use, the fine gate electrode connected to the connection electrode has the same polarity as the connection electrode. It is understood that the fine gate electrode connected to the positive connection electrode is a positive ultrafine gate electrode, and the fine gate electrode connected to the negative connection electrode is a negative ultrafine gate electrode. In addition, the fine gate electrode is connected to the connection electrode having the same polarity, and is spaced apart from the connection electrode having the opposite polarity by a first predetermined distance to prevent a short circuit from occurring. The connecting electrode comprises a plurality of connecting points, and the connecting points are used for connecting the solar cell and the conducting wire. The insulating layers are arranged between the connecting points, at least part of the insulating layers cover the fine gate electrodes close to the connecting electrodes, and the insulating layers are used for further isolating the connecting electrodes from the fine gate electrodes with opposite polarities and preventing the connecting electrodes from being communicated with the fine gate electrodes with opposite polarities to cause short circuit. The insulating layer extends for a certain distance along at least one of the first direction and the second direction, and it can be understood that when the insulating layer extends for a certain distance along the first direction, the width of the insulating layer along the first direction is increased, the area of the insulating layer is enlarged, the connection between the fine grid electrode and the connecting electrode with opposite polarity is avoided, the fine grid electrode with opposite polarity to the connecting electrode is better covered and insulated, the beneficial effect of reducing the incomplete probability of the grid line of the covered electrode is achieved, and the quality of the battery assembly is further improved. When the insulating layer extends for a certain distance along the second direction, the width of the insulating layer along the second direction is increased, the area of the insulating layer is enlarged, incomplete coverage of the insulating layer caused by deviation of the fine grid electrode in the processing or using process is avoided, the beneficial effect of reducing the incomplete probability of covering the grid line of the electrode is achieved, and the quality of the battery assembly is further improved. In addition, when the welding strip is adopted for welding, due to the fact that the area of the insulating layer is enlarged, even if the welding strip slightly deviates, short circuit caused by welding deviation can not occur, and the beneficial effect of reducing the risk of short circuit caused by welding deviation of the welding strip is achieved. In a second aspect, embodiments of the present application provide a solar cell module including a plurality of solar cells as described above.
Drawings
Fig. 1 is a schematic structural diagram of a solar cell module in an embodiment of the present application;
fig. 2 is a schematic structural view of a solar cell module at another angle in the embodiment of the present application;
FIG. 3 is a schematic structural diagram of a solar cell in an embodiment of the present application;
FIG. 4 is a schematic structural view of another solar cell in the embodiment of the present application;
FIG. 5 is a schematic view of a connection structure of a plurality of central first insulating layers according to an embodiment of the present application;
FIG. 6 is a schematic view of a connection structure of a plurality of central second insulating layers according to an embodiment of the present application;
FIG. 7 is a schematic view of a connection structure of a plurality of edge second insulating layers according to an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of a connection structure of a plurality of edge first insulating layers according to an embodiment of the present application;
FIG. 9 is a schematic view of a structure in which a central second insulating layer is widened in a first direction in the embodiment of the present application;
FIG. 10 is a schematic view of a second central insulating layer widened in a second direction in an embodiment of the present application;
FIG. 11 is a schematic structural diagram of a central first insulating layer in an embodiment of the present application;
FIG. 12 is a schematic structural diagram of an edge first insulating layer according to an embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of an edge second insulating layer in an embodiment of the present application.
Description of reference numerals:
10. connecting the electrodes; 11. a first connecting electrode; 111. a first connection point; 12. a second connection electrode; 121. a second connection point; 20. a fine gate electrode; 21. a first fine gate electrode; 22. a second fine gate electrode; 30. an insulating layer; 31. a central first insulating layer; 311. a first central protected zone; 312. a first off-set welding prevention protection area; 32. an edge first insulating layer; 321. a first insulating portion; 322. a second insulating section; 33. a central second insulating layer; 331. a second central protected area; 332. a second off-set welding prevention protection area; 34. an edge second insulating layer; 341. a third insulating section; 342. and a fourth insulating portion.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The solar cell and the solar cell module provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1 to 13, an embodiment of the present application provides a solar cell including: the backlight module comprises a semiconductor substrate, a connecting electrode 10 and a fine grid electrode 20, wherein the connecting electrode 10 and the fine grid electrode 20 are arranged on a backlight plate of the semiconductor substrate, the connecting electrode 10 is arranged along a first direction, the fine grid electrode 20 is arranged along a second direction, the first direction and the second direction are crossed, the fine grid electrode 20 is connected with the connecting electrode 10, the fine grid electrode 20 and the connecting electrode 10 with opposite polarities are separated by a first preset distance, and the connecting electrode 10 comprises a plurality of connecting points for being connected with a conductive wire; a plurality of insulating layers disposed between the connection points, the insulating layers covering at least a part of the fine gate electrode 20 adjacent to the connection electrode 10 and having a polarity opposite to that of the connection electrode 10; wherein the insulating layer extends a distance in at least one of the first direction and the second direction.
In the embodiment of the present application, the fine gate electrode 20 is distributed on the surface of the semiconductor substrate, and is used for collecting the charged carriers generated on the surface of the semiconductor substrate and transmitting and collecting the collected charged carriers to the connection electrode 10, that is, current is formed and collected in the fine gate electrode 20 and the connection electrode 10. Wherein the connection electrode 10 is disposed in a first direction, the fine gate electrode 20 is disposed in a second direction, and the first direction and the second direction cross. The connection electrode 10 is connected to the fine gate electrode 20, and in practical use, the fine gate electrode 20 connected to the connection electrode 10 has the same polarity as the connection electrode 10. It is understood that the fine gate electrode 20 connected to the positive electrode connecting electrode 10 is a positive electrode fine gate electrode 20, and the fine gate electrode 20 connected to the negative electrode connecting electrode 10 is a negative electrode fine gate electrode. In addition, the fine gate electrode 20 is spaced apart from the connection electrode 10 having the opposite polarity by a first predetermined distance to prevent a short circuit from occurring. The connection electrode 10 includes a plurality of connection points therein, and the connection points are provided to connect the solar cell and the conductive wires. A plurality of insulating layers are arranged between the connection points, the insulating layers at least cover part of the fine gate electrode 20 which is close to the connection electrode 10 and has the opposite polarity to the connection electrode 10, and the insulating layers are arranged to further isolate the connection electrode 10 and the fine gate electrode 20 with the opposite polarity to the connection electrode, so that the connection electrode 10 and the fine gate electrode 20 with the opposite polarity are prevented from being communicated to cause short circuit. The insulating layer extends for a certain distance along at least one of the first direction and the second direction, and it can be understood that when the insulating layer extends for a certain distance along the first direction, the width of the insulating layer along the first direction is increased, the area of the insulating layer is enlarged, the connection between the fine grid electrode 20 and the connecting electrode 10 with opposite polarity is avoided, the fine grid electrode 20 with opposite polarity to the connecting electrode 10 is better covered and insulated, the beneficial effect of reducing the incomplete probability of the grid line of the covered electrode is achieved, and the quality of the battery assembly is further improved. When the insulating layer extends for a certain distance along the second direction, the width of the insulating layer along the second direction is increased, the area of the insulating layer is enlarged, incomplete coverage of the insulating layer caused by deviation of the fine grid electrode 20 in the processing or using process is avoided, the beneficial effect of reducing the incomplete probability of covering the grid line of the electrode is achieved, and the quality of the battery component is further improved. In addition, when the welding strip is adopted for welding, due to the fact that the area of the insulating layer is enlarged, even if the welding strip slightly deviates, short circuit caused by welding deviation can not occur, and the beneficial effect of reducing the risk of short circuit caused by welding deviation of the welding strip is achieved.
Specifically, the fine grid electrode 20 is connected to the connection electrode 10 with the same polarity, and is spaced from the connection electrode 10 with the opposite polarity by a first preset distance, that is, one end of the positive fine grid electrode 20 is connected to the positive connection electrode 10, and the other end is spaced from the negative connection electrode 10 by the first preset distance, so that the connection with the negative connection electrode 10 is realized, and short circuit is avoided; one end of the negative fine grid electrode 20 is connected with the negative connecting electrode 10, and the other end of the negative fine grid electrode is separated from the positive connecting electrode 10 by a first preset distance, so that the negative fine grid electrode is disconnected from the positive connecting electrode 10, and short circuit is avoided. The spacing distance between the positive electrode fine grid electrode 20 and the negative electrode connecting electrode 10 may be the same as or different from the spacing distance between the negative electrode fine grid electrode 20 and the positive electrode connecting electrode 10, and is a first preset distance, where the first preset distance may be a distance when no short circuit occurs between the connecting electrode 10 and the fine grid electrode 20 with opposite polarity.
Optionally, in the embodiment of the present application, the connection electrode 10 of the middle region of the solar cell includes a plurality of connection points and a main gate electrode connecting the plurality of connection points, and the connection electrode 10 of the edge region of the solar cell includes a plurality of connection points; the connection electrode 10 includes a first connection electrode 11 and a second connection electrode 12 having opposite polarities, the first connection electrode 11 and the second connection electrode 12 are disposed at intervals, the first connection electrode 11 includes a first connection point 111, and the second connection electrode 12 includes a second connection point 121; the fine gate electrode 20 comprises a first fine gate electrode 21 and a second fine gate electrode 22 with opposite polarities, and the first fine gate electrode 21 and the second fine gate electrode 22 are arranged at intervals; the insulating layers include a first insulating layer disposed between the first connection points 111 and a second insulating layer disposed between the second connection points 121, the first insulating layer covering at least a portion of the second fine gate electrode 22, and the second insulating layer covering at least a portion of the first fine gate electrode 21.
In the embodiment of the present application, the solar cell is divided into the middle region and the edge region according to the structure of the solar cell, the side surface close to the semiconductor substrate in the first direction is the edge region, and the non-edge region of the solar cell is the middle region. The connecting electrode in the edge area comprises a plurality of connecting points, and the connecting electrode in the middle area comprises a plurality of connecting points and a main grid electrode connected with the plurality of connecting points. The connection electrodes include a first connection electrode 11 and a second connection electrode 12 having opposite polarities, the fine gate electrode 20 connected to the first connection electrode 11 is a first fine gate electrode 21, and the fine gate electrode connected to the second connection electrode 12 is a second fine gate electrode 22 20. The fine gate electrode 20 includes a first fine gate electrode 21 and a second fine gate electrode 22 having opposite polarities, wherein the first connection electrode 11 and the first fine gate electrode 21 are connected, the second connection electrode 12 and the second fine gate electrode 22 are connected, the first connection electrode 11 and the second connection electrode 12 are disposed in parallel and spaced apart from each other along the first direction, and the first fine gate electrode 21 and the second fine gate electrode 22 are disposed in parallel and spaced apart from each other along the second direction. The insulating layer includes a first insulating layer disposed between the second connection points 121 and a second insulating layer covering the second fine gate electrodes 22 near both sides of the first connection electrode 11; the second insulating layer is disposed between the second connection points 121, and covers the first fine gate electrodes 21 near both sides of the second connection electrode 12.
Specifically, the first insulating layer extends for a certain distance along at least one of the first direction and the second direction, the width of the insulating layer along the first direction is increased by the first insulating layer extending for a certain distance along the first direction, so that the area of the insulating layer between the first fine gate electrodes 21 having the same polarity as the first connection electrodes 11 is enlarged, the second fine gate electrodes 22 having the opposite polarity to the first connection electrodes 11 can be covered as much as possible, the width of the insulating layer along the second direction is increased by the first insulating layer extending for a certain distance along the second direction, the second fine gate electrodes 22 having a longer length can be covered, the coverage probability of the fine gate electrodes is improved, and the quality of the solar cell is improved.
Specifically, the second insulating layer extends for a certain distance along at least one of the first direction and the second direction, the width of the insulating layer along the first direction is increased by the second insulating layer extending for a certain distance along the first direction, so that the area of the insulating layer between the second fine gate electrodes 22 with the same polarity as the second connection electrodes 12 is enlarged, the first fine gate electrodes 21 with the polarity opposite to that of the second connection electrodes 12 can be covered as much as possible, the width of the insulating layer along the second direction is increased by the second insulating layer extending for a certain distance along the second direction, the longer first fine gate electrodes 21 can be covered, the coverage probability of the fine gate electrodes is improved, and the quality of the solar cell is improved.
Preferably, the first insulating layers are symmetrically arranged along two sides of the center line of the first connecting electrode 11, and the length of one or two first insulating layers along the first direction far away from the first connecting electrode 11 is reduced; the second insulating layers are symmetrically arranged along two sides of the center line of the second connecting electrode 12, and the length of the second insulating layer on one side or two sides in the first direction is in a decreasing trend along the length far away from the second connecting electrode 12.
Optionally, in the embodiment of the present application, the first insulating layers include a central first insulating layer 31 and an edge first insulating layer 32, and the second insulating layers include a central second insulating layer 33 and an edge second insulating layer 34;
a central first insulating layer 31 and a central second insulating layer 33 are both arranged in the middle region of the solar cell, the central first insulating layer 31 covering the first connection electrode 11 and at least part of the second fine gate electrode 22, the central second insulating layer 33 covering the second connection electrode 12 and at least part of the first fine gate electrode 21;
wherein the central first insulating layer 31 and the central second insulating layer 33 are arranged at intervals along the second direction;
the edge first insulating layer 32 is disposed at an edge region of the solar cell, or the edge second insulating layer 34 is disposed at an edge region of the solar cell; the edge first insulating layer 32 covers the fine gate electrode 20 where the first connection point 111 is not disposed, and the edge second insulating layer 34 covers the fine gate electrode 20 where the second connection point 121 is not disposed.
In the embodiment of the present application, the center first insulating layer 31 and the center second insulating layer 33 are disposed at the center region of the solar cell, and the edge first insulating layer 32 and the edge second insulating layer 34 are disposed at the edge region of the solar cell. Wherein, the central first insulating layer 31 covers the first connection electrode 11 and the second fine gate electrodes 22 at both sides of the first connection electrode 11, the central second insulating layer 33 covers the second connection electrode 12 and the first fine gate electrodes 21 at both sides of the second connection electrode 12, and both the central first insulating layer 31 and the central second insulating layer 33 extend to both sides of the fine gate electrodes along the first direction to enlarge the widths of the central first insulating layer 31 and the central second insulating layer 33 in the first direction and enlarge the insulating layer area. The edge first insulating layer 33 and the edge second insulating layer 34 both extend to the two sides of the connection electrode 10 along the second direction, so as to expand the length of the first edge insulating layer and the second edge insulating layer in the second direction, expand the area of the insulating layers, cover the fine gate electrode as much as possible, and have the beneficial effects of improving the coverage probability of the fine gate electrode and improving the quality of the solar cell. Furthermore, when the welding strip is used for welding, due to the fact that the area of the insulating layer of each part is enlarged, even if the welding strip has slight deviation, short circuit caused by welding deviation can not occur, and the beneficial effect of reducing the risk of short circuit caused by welding deviation of the welding strip is achieved.
Optionally, in this embodiment of the present application, the central first insulating layer 31 includes a first central protection region 311 and a first off-set prevention protection region 312, and the first off-set prevention protection region 312 is disposed on two sides of the first central protection region 311 along the second direction;
the first central protection region 311 covers the first connection electrode 11, and the first off-set welding prevention protection region 312 covers at least a part of the second fine gate electrodes 22 at both sides of the first connection electrode 11, wherein the first off-set welding prevention protection region 312 extends toward the central region along the first direction;
the length of the first central protection region 311 in the second direction is greater than the length of the first off-set welding prevention protection region 312; the length of the first central protection region 311 in the first direction is greater than the length of the first off-set prevention protection region 312.
In the embodiment of the present application, the first central protection region 311 is provided to cover the first connection electrode 11, and covering the first connection electrode 11 may prevent a short circuit of the solar cell caused by soldering the first connection electrode 11 and the fine gate electrode having opposite polarities together in soldering. The first deviation prevention welding protection region 312 is provided to cover at least a portion of the second fine grid electrode 22 disposed at both sides of the first connection electrode 11, and the first deviation prevention welding protection region 312 is provided to prevent a short circuit of the solar cell caused by the welding of the second fine grid electrode 22 to the opposite-polarity connection electrode by deviation welding in the welding. In addition, the first deviation-proof welding protection region 312 also extends to a position close to the central region along the first direction, so that the area of the first deviation-proof welding protection region 312 is enlarged.
In addition, the lengths of the first central protection region 311 in the first direction and the second direction are both greater than that of the first off-set welding prevention protection region 312, and the beneficial effects of increasing the insulation area at the connection electrode and the fine grid electrode with the opposite polarity, improving the coverage probability of the fine grid electrode and improving the quality of the solar cell are achieved.
It should be noted that the central first insulating layer 31 may be rectangular, triangular, semicircular or arc-shaped, which is not limited in this embodiment.
Optionally, in this embodiment of the application, the central second insulating layer 33 includes a second central protection region 331 and a second bias welding prevention protection region 332, and the second bias welding prevention protection region 332 is disposed on two sides of the second central protection region 331 along the second direction;
the second central protection region 331 covers the second connection electrode 12, and the second off-set welding prevention protection region 332 covers at least part of the second fine gate electrodes 22 on both sides of the second connection electrode 12;
the length of the second central protection zone 331 in the second direction is greater than the length of the second off-set welding prevention protection zone 332; the length of the second central protection area 331 in the first direction is greater than the length of the second off-set welding prevention protection area 332.
In the embodiment of the present application, the second central protection area 331 is provided to cover the second connection electrode 12, and covering the second connection electrode 12 can prevent a short circuit of the solar cell caused by welding the second connection electrode 12 and the thin gate electrode of opposite polarity together in the welding. The second deviation-proof welding protection region 332 is disposed to cover at least a portion of the first thin gate electrode 21 disposed at both sides of the second connection electrode 12, and the second deviation-proof welding protection region 332 is disposed to prevent a short circuit of the solar cell caused by the deviation welding of the first thin gate electrode 21 to the opposite-polarity connection electrode in the welding. In addition, the second off-set welding protection area also extends to a position close to the central area along the first direction, so that the area of the second off-set welding protection area 332 is enlarged.
In addition, the lengths of the second central protection region 331 in the first direction and the second direction are both greater than that of the second off-welding prevention protection region 332, and the beneficial effects of increasing the insulation area at the connection electrode and the fine grid electrode with the opposite polarity, improving the coverage probability of the fine grid electrode and improving the quality of the solar cell are achieved.
It should be noted that the central second insulating layer 33 may be rectangular, triangular, semicircular or arc-shaped, which is not limited in this embodiment.
It should be further noted that, the width of the first central protection region 311 in the second direction is smaller than that of the second central protection region 331, the width of the first off-set prevention protection region 312 in the second direction is smaller than that of the second off-set prevention protection region 332, the warp deformation of the edge of the solar cell is larger than that of the central region, and the second central protection region 331 and the second off-set prevention protection region 332 with larger widths can effectively prevent the risk of short circuit between the conductive wire and the second fine-grid electrode 22; the length of the first central protection region 311 in the second direction is greater than that of the second central protection region 331, so that the first connection electrode 11 can be fully covered, and the risk that the first connection gate line is fused by a conductive wire is reduced.
Optionally, in this embodiment of the application, the edge first insulating layer 32 includes a first insulating portion 321 and a second insulating portion 322 disposed away from each other, the second insulating portion 322 extends near the middle region of the solar cell along the second direction, and a length of the second insulating portion 322 is greater than a length of the first insulating portion 321.
In the embodiment of the present application, the first insulating portion 321 and the second insulating portion 322 disposed away from each other extend along the second direction, the first insulating portion 321 and the second insulating portion 322 both cover the thin gate electrode, wherein the second edge portion extends toward the middle region along the second direction, and the length of the second edge portion covering the thin gate electrode along the second direction is greater than the length of the first insulating portion 321 covering the thin gate electrode along the second direction. In practical application, after the insulating layer is printed, dried and cured, the solar cell is easy to warp, the warping at the edge is more obvious, and the insulating layer is easy to deviate when the insulating layer is connected through a conducting wire. In order to reduce the risk of short circuit which may be caused by the deviation of the insulating layers when the conductive lines are connected, the edge first insulating layer 32 and the edge second insulating layer 34 have a larger overall width of the center second insulating layer 33 than the center first insulating layer 31, and the second edge portion is longer than the first edge portion because the probability that the edge first insulating layer 32 is shifted inward is higher, and the probability that the insulating layer coverage is insufficient when printing after widening the second insulating portion 322 is effectively reduced.
Optionally, in this embodiment, the edge second insulating layer 34 includes a third insulating portion 341 and a fourth insulating portion 342 disposed away from each other, the fourth insulating portion 342 extends near the middle region of the solar cell along the second direction, and the length of the fourth insulating portion 342 is greater than that of the third insulating portion 341.
In the embodiment of the present application, the third insulating portion 341 and the fourth insulating portion 342 disposed apart from each other extend in the second direction, the third insulating portion 341 and the fourth insulating portion 342 each cover the thin gate electrode, wherein the fourth edge portion extends toward the middle region in the second direction, and the length of the fourth edge portion covering the thin gate electrode in the second direction is greater than the length of the third insulating portion 341 covering the thin gate electrode in the second direction. In practical application, after the insulating layer is printed, dried and cured, the solar cell is easy to warp, the warping at the edge is more obvious, and the insulating layer is easy to deviate when the insulating layer is connected through a conducting wire. In order to reduce the risk of short circuit which may be caused by the deviation of the insulating layers when the conductive lines are connected, the overall width of the edge first insulating layer 32 and the edge second insulating layer 34 is larger than that of the center second insulating layer 33 of the center first insulating layer 31, and the fourth edge is longer than the third edge because the probability that the edge first insulating layer 32 is shifted inward is larger, and the longer fourth insulating portion 342 has the advantageous effect of improving the probability of coverage of the fine gate electrode.
Optionally, in the embodiment of the present application, the length of the first central protection region 311 in the first direction ranges from 0.2mm to 0.8mm, and the length of the first central protection region 311 in the second direction ranges from 1mm to 2mm;
the length of the first off-set welding prevention protection area 312 in the first direction ranges from 0.15mm to 0.5mm, and the length of the first off-set welding prevention protection area 312 in the second direction ranges from 0.5mm to 1.5mm.
In the embodiment of the present application, the length of the first central protection region 311 in the first direction is set to be a length for covering the first connection electrode 11, the length of the first central protection region 311 in the second direction is set to be a width for covering the first connection electrode 11, the first central protection region 311 in a certain length and a certain width enlarges the coverage area of the first central protection region 311, and a certain gap exists between the first central protection region 311 and the adjacent central first insulating layer 31, so that the coverage probability of the first connection electrode 11 is improved, and meanwhile, the beneficial effect of preventing the large insulating layers from being connected together to cause the warpage of the battery cell is also achieved. The length of the first off-set prevention protection region 312 in the first direction is set to cover the width of the second thin gate electrode 22 and the distance between the two first thin gate electrodes 21; the length of the first off-set protection zone 312 on the second down-set one is used to cover the length of the second fine grid electrode 22, which has the beneficial effect of increasing the coverage area for the second shirt electrode.
Preferably, the length of the first central protection zone 311 in the first direction is 0.4mm to 0.6mm, and the length of the first central protection zone 311 in the first direction ranges from 1.2mm to 1.5mm. The length of the first deviation-proof welding protection area 312 in the first direction ranges from 0.25mm to 0.35mm, and the length of the first deviation-proof welding protection area 312 in the first direction ranges from 0.8mm to 1.2mm.
It should be noted that, there is a partial connection in the first direction between adjacent first central protection regions 311, or a certain distance, for example, 0.1-0.5mm, and compared with the arrangement that entirely covers the region between the first connection points 111, the open position of adjacent first central protection regions 311 can play a role in promoting stress release during the drying and curing process of the insulating layer, so as to reduce the warpage of the battery piece. The ratio of the length of the central protection zone in the first direction to the length of the open area in the first direction is 2.5.
Optionally, in the embodiment of the present application, the length of the second central protection area 331 in the first direction ranges from 0.2mm to 0.8mm, and the length of the first central protection area 311 in the second direction ranges from 1.5mm to 2.5mm;
the length of the second deviation-proof welding protection area 332 in the first direction ranges from 0.2mm to 0.5mm, and the length of the second deviation-proof welding protection area 332 in the second direction ranges from 0.5mm to 1.2mm.
In the embodiment of the present application, the length of the second central protection region 331 in the first direction is set to be a length for covering the second connection electrode 12, the length of the second central protection region 331 in the second direction is set to be a width for covering the second connection electrode 12, and the second central protection region 331 with a certain length and a certain width has a certain gap with the adjacent central second insulation layer 33 while the coverage area of the second central protection region 331 is enlarged, so that the coverage probability of the second connection electrode 12 is improved, and meanwhile, the beneficial effect of preventing the cell from warping caused by the connection of large insulation layers is also achieved. The length of the second off-set prevention protection region 332 in the first direction is set to cover the width of the first fine gate electrode 21 and the distance between the two second fine gate electrodes 22; the length of the second off-set prevention protection region 332 in the second direction is used to cover the length of the first fine gate electrode 21, which has the beneficial effect of increasing the coverage area of the first fine gate electrode 21.
Preferably, the length of the second central protection zone 331 in the first direction is 0.4mm to 0.6mm, and the length of the second central protection zone 331 in the second direction is in the range of 1.8mm to 2.1mm. The length of the second deviation-proof welding protection area 332 in the first direction ranges from 0.3mm to 0.4mm, and the length of the second deviation-proof welding protection area 332 in the second direction ranges from 0.8mm to 1mm.
It should be noted that the width of the first central protection region 311 in the second direction is smaller than that of the second central protection region 331, the width of the first offset welding prevention protection region 312 in the second direction is smaller than that of the second offset welding prevention protection region 332, the warp deformation of the edge of the battery is larger than that of the central region, and the second central protection region 331 and the second offset welding prevention protection region 332 with larger widths can effectively prevent the risk of short circuit between the conductive wire and the second thin gate line; the first central protection region 311 is longer than the second central protection region 331 in the first direction, so that the first connection electrode 11 can be sufficiently covered, and the risk of fusing caused by welding the first connection grid line by a conductive wire is reduced.
Optionally, in an embodiment of the present application, there is also provided a solar cell module including a plurality of solar cells as described above.
In the embodiment of the application, a plurality of solar cells are interconnected to form a solar cell module, so that the current generated and concentrated in the plurality of solar cells is further collected to supply power to external equipment. The conductive lines are connected to the first connection point 111 of the first solar cell and the second connection point 121 of the second solar cell and insulated from the second fine gate electrode 22 and the first fine gate electrode 21 by the first insulating layer and the second insulating layer, respectively. More specifically, the first conductive wire may be connected to the first connection point 111 of the first connection electrode 11 of the first solar cell using a conductive adhesive or by soldering and electrically connected to the second connection point 121 extending in the second direction from the second connection electrode 12 of the first and second solar cells, and electrically insulated from the second and first fine gate lines by a first insulating layer between the first connection points 111 and a second insulating layer between the second connection points 121, respectively; the second conductive line may be connected to the second connection point 121 of the second connection electrode 12 of the first solar cell by a conductive adhesive or by soldering and extend in the second direction beyond the first connection point 111 of the first connection electrode 11 of the first solar cell and electrically connected to the second and first fine gate lines by a first insulating layer between the first connection points 111 and a second insulating layer between the second connection points 121, respectively.
The plurality of first and second conductive lines may have a conductive line shape of a circular cross section or may have a strip shape having a width greater than a thickness, the first and second conductive lines may have a line width ranging from 0.5mm to 2mm, and the number of each of the first and second conductive lines connected to one solar cell may be 5 to 15. The first and second conductive wires may be connected to the first and second conductive type electrodes on the back surface of each battery by a conductive adhesive, which may be a solder paste including tin or a tin-containing alloy, or a conductive paste formed of an epoxy resin, an acrylic resin, a silicone resin, including tin or a tin-containing alloy, or by soldering.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A solar cell, comprising:
the backlight module comprises a semiconductor substrate, a connecting electrode and a fine grid electrode, wherein the connecting electrode and the fine grid electrode are arranged on a backlight plate of the semiconductor substrate, the connecting electrode is arranged along a first direction, the fine grid electrode is arranged along a second direction, the first direction and the second direction are crossed, the fine grid electrode is connected with the connecting electrode, the fine grid electrode and the connecting electrode with opposite polarity are separated by a first preset distance, and the connecting electrode comprises a plurality of connecting points for being connected with a conductive wire;
a plurality of insulating layers disposed between the connection points, the insulating layers covering at least a portion of the fine gate electrode adjacent to the connection electrode and having a polarity opposite to that of the connection electrode; wherein the insulating layer extends a distance along at least one of the first direction and the second direction.
2. The solar cell according to claim 1, wherein the connection electrode of the middle region of the solar cell comprises a plurality of the connection points and a main gate electrode connecting the plurality of the connection points, and the connection electrode of the edge region of the solar cell comprises a plurality of the connection points;
the connecting electrodes comprise a first connecting electrode and a second connecting electrode which are opposite in polarity, the first connecting electrode and the second connecting electrode are arranged at intervals, the first connecting electrode comprises a first connecting point, and the second connecting electrode comprises a second connecting point;
the fine grid electrodes comprise a first fine grid electrode and a second fine grid electrode which are opposite in polarity, and the first fine grid electrode and the second fine grid electrode are arranged at intervals;
the insulating layer includes first insulating layer and second insulating layer, the first insulating layer sets up between the first tie point, the second insulating layer sets up between the second tie point, first insulating layer covers part at least the second fine grid electrode, the second insulating layer covers part at least first fine grid electrode of part.
3. The solar cell of claim 2, wherein the first insulating layer comprises a central first insulating layer and an edge first insulating layer, and the second insulating layer comprises a central second insulating layer and an edge second insulating layer;
the central first insulating layer and the central second insulating layer are both disposed in a middle region of the solar cell, the central first insulating layer covers the first connection electrode and at least a portion of the second fine gate electrode, and the central second insulating layer covers the second connection electrode and at least a portion of the first fine gate electrode;
wherein the central first insulating layer and the central second insulating layer are disposed at intervals along the second direction;
the first edge insulating layer is arranged in the edge region of the solar cell, or the second edge insulating layer is arranged in the edge region of the solar cell; the edge first insulating layer covers the fine gate electrode without the first connection point, and the edge second insulating layer covers the fine gate electrode without the second connection point.
4. The solar cell of claim 3, wherein the central first insulating layer comprises a first central protection region and a first off-set prevention protection region, the first off-set prevention protection region being disposed on both sides of the first central protection region along the second direction;
the first central protection region covers the first connecting electrode, the first bias welding prevention protection region covers at least part of the second fine grid electrodes on two sides of the first connecting electrode, and the first bias welding prevention protection region extends towards a region close to the center along a first direction;
the length of the first central protection area in the second direction is greater than that of the first deviation-prevention welding protection area; the length of the first central protection area in the first direction is greater than that of the first deviation-prevention welding protection area.
5. The solar cell of claim 4, wherein the central second insulating layer comprises a second central protection region and a second off-set prevention protection region, the second off-set prevention protection region being disposed on both sides of the second central protection region along the second direction;
the second central protection region covers the second connecting electrode, and the second bias welding prevention protection region covers at least part of the second fine gate electrodes on two sides of the second connecting electrode;
the length of the second central protection area in the second direction is greater than that of the second off-set welding prevention protection area; the length of the second central protection area in the first direction is larger than that of the second deviation-prevention welding protection area.
6. The solar cell of claim 5, wherein the edge first insulating layer comprises a first insulating portion and a second insulating portion disposed away from each other, the second insulating portion extending in the second direction proximate to the middle region of the solar cell, the second insulating portion having a length greater than a length of the first insulating portion.
7. The solar cell of claim 6, wherein the edge second insulating layer comprises a third insulating portion and a fourth insulating portion disposed away from each other, the fourth insulating portion extending in the second direction proximate to a middle region of the solar cell, a length of the fourth insulating portion being greater than a length of the first insulating portion.
8. The solar cell of claim 7, wherein the first central protective region has a length in the second direction in a range of 0.2mm to 0.8mm, and the second central protective region has a length in the first direction in a range of 1.5mm to 2.5mm;
the length range of the first deviation-prevention welding protection area in the second direction is 0.2 mm-0.5 mm, and the length range of the first deviation-prevention welding protection area in the first direction is 0.5 mm-1.2 mm.
9. The solar cell of claim 8, wherein the length of the second central protection region in the second direction is in a range of 0.2mm to 0.8mm, and the length of the second central protection region in the second direction is in a range of 1.5mm to 2.5mm;
the length range of the second deviation-prevention welding protection area in the second direction is 0.2 mm-0.5 mm, and the length range of the second deviation-prevention welding protection area in the second direction is 0.5 mm-1.2 mm.
10. A solar cell module comprising a plurality of solar cells according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221964394.9U CN218730966U (en) | 2022-07-27 | 2022-07-27 | Solar cell and solar cell module |
| PCT/CN2023/101152 WO2024021930A1 (en) | 2022-07-27 | 2023-06-19 | Solar cell and solar cell module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221964394.9U CN218730966U (en) | 2022-07-27 | 2022-07-27 | Solar cell and solar cell module |
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| CN218730966U true CN218730966U (en) | 2023-03-24 |
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| CN202221964394.9U Active CN218730966U (en) | 2022-07-27 | 2022-07-27 | Solar cell and solar cell module |
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| CN (1) | CN218730966U (en) |
| WO (1) | WO2024021930A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024021930A1 (en) * | 2022-07-27 | 2024-02-01 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and solar cell module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN215988783U (en) * | 2021-06-30 | 2022-03-08 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and photovoltaic module |
| CN215988787U (en) * | 2021-06-30 | 2022-03-08 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and photovoltaic module |
| CN215988784U (en) * | 2021-06-30 | 2022-03-08 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and photovoltaic module |
| CN216719958U (en) * | 2021-08-25 | 2022-06-10 | 泰州隆基乐叶光伏科技有限公司 | Solar cell, solar cell piece and photovoltaic module |
| CN218730966U (en) * | 2022-07-27 | 2023-03-24 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and solar cell module |
-
2022
- 2022-07-27 CN CN202221964394.9U patent/CN218730966U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024021930A1 (en) * | 2022-07-27 | 2024-02-01 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and solar cell module |
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