CN218788381U - Solar cell and solar cell module - Google Patents
Solar cell and solar cell module Download PDFInfo
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- CN218788381U CN218788381U CN202222595709.3U CN202222595709U CN218788381U CN 218788381 U CN218788381 U CN 218788381U CN 202222595709 U CN202222595709 U CN 202222595709U CN 218788381 U CN218788381 U CN 218788381U
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Abstract
The utility model discloses a solar cell and solar module. The solar cell includes: the first electrode main grid and the second electrode main grid are alternately arranged on the back of the solar cell, and the polarity of the second electrode main grid is opposite to that of the first electrode main grid; the first electrode secondary grid on the edge first electrode main grid is electrically connected with the first electrode secondary grid on the nearest non-edge first electrode main grid, and the non-edge second electrode main grid which is nearest to the edge first electrode main grid is non-continuous; the second electrode secondary grid on the edge second electrode main grid is electrically connected with the second electrode secondary grid on the nearest non-edge second electrode main grid, and the non-edge first electrode main grid which is nearest to the edge second electrode main grid is in a non-continuous type. In the manufacturing process of the solar cell module, the first electrode main grid at the edge and the second electrode main grid at the edge do not need to be welded, hidden cracking risks brought to the solar cell by welding are avoided, and the yield and the reliability of the solar cell module are improved.
Description
Technical Field
The utility model relates to a solar cell and solar module.
Background
The Interdigitated back contact cell, also called IBC (Interdigitated back contact) cell, is one of the technical directions for realizing a high-efficiency crystalline silicon cell. The IBC battery has the biggest characteristics that the emitter and the metal contact are both positioned on the back surface of the battery, and the front surface of the IBC battery is not influenced by the shielding of the metal electrode, so that the IBC battery has higher short-circuit current Jsc, and meanwhile, wider metal grid lines can be allowed on the back surface to reduce the series resistance Rs so as to improve the fill factor FF; and the battery with the front surface without shielding has high conversion efficiency, is more attractive, and is easier to assemble.
In the prior art, the electrode main grid line of the IBC cell is located at the edge of the silicon wafer, and in the manufacturing process of the solar cell module, the welding strip is connected with the electrode main grid at the edge of the IBC cell, so that the welding strip covers the edge of the IBC cell, at the moment, a large number of micro cracks exist at the edge of the IBC cell, stress is concentrated, the problem of cracking is caused, and the yield and the reliability of the photovoltaic module are reduced.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a solar cell and a solar cell module, in which a non-edge second electrode main grid closest to an edge first electrode main grid in the solar cell is discontinuously arranged, and the edge first electrode main grid can transmit a collected current to the closest non-edge first electrode main grid for a first electrode auxiliary grid to pass through a abdication; based on the same arrangement, the edge second electrode main grid can convey the collected current to the nearest non-edge second electrode main grid, so that the edge first electrode main grid and the edge second electrode main grid do not need to be welded in the manufacturing process of the solar cell module, hidden crack risks brought to the solar cell by welding are avoided, the yield and the reliability of the solar cell module are improved, meanwhile, the edge current carrier collection efficiency is high, and the excellent photoelectric conversion efficiency of the solar cell and the solar cell module can be ensured.
In order to achieve the above object, the present invention provides the following technical solutions:
on the first hand, a first electrode main grid and a second electrode main grid which is opposite to the first electrode main grid in polarity are alternately arranged on the back surface of the solar cell, a first electrode auxiliary grid connected with the first electrode main grid and a second electrode auxiliary grid connected with the second electrode main grid;
the first electrode main grids comprise edge first electrode main grids nearest to the edge of the solar cell and other non-edge first electrode main grids, and the second electrode main grids comprise edge second electrode main grids nearest to the edge of the solar cell and other non-edge second electrode main grids;
the non-edge second electrode main grid closest to the edge first electrode main grid forms a non-continuous non-edge second electrode main grid, and the first electrode auxiliary grid on the edge first electrode main grid penetrates through the non-continuous area of the non-continuous non-edge second electrode main grid and is electrically connected with the first electrode auxiliary grid on the non-edge first electrode main grid closest to the edge first electrode main grid;
and the non-edge first electrode main grid closest to the edge second electrode main grid forms a non-continuous non-edge first electrode main grid, and the second electrode auxiliary grid on the edge second electrode main grid penetrates through the non-continuous region of the non-continuous non-edge first electrode main grid and is electrically connected with the second electrode auxiliary grid on the non-edge second electrode main grid closest to the edge second electrode main grid.
Further, the first electrode main grid and the second electrode main grid are parallel to each other along the first direction and are arranged at intervals.
Furthermore, the first electrode secondary grids and the second electrode secondary grids are arranged in parallel and at intervals along a second direction intersecting with the first direction, and a plurality of first electrode secondary grids which are not directly connected with the edge first electrode main grids and the non-edge first electrode main grids and a plurality of second electrode secondary grids which are not directly connected with the edge second electrode main grids and the non-edge second electrode main grids are arranged in a finger-shaped cross mode.
Further, the number of the first electrode secondary grids connected with the non-edge first electrode main grids on the edge first electrode main grids is less than or equal to the total number of the first electrode secondary grids.
Further, the number of the second electrode secondary grids connected with the non-edge second electrode main grids on the edge second electrode main grids is less than or equal to the total number of the second electrode secondary grids.
The solar cell further comprises an insulating layer, wherein the insulating layer is arranged in an electrode-free area of the discontinuous non-edge first electrode main grid, an electrode-free area of the discontinuous non-edge second electrode main grid, a position of the first electrode auxiliary grid close to the tail end of the non-edge first electrode main grid, and a position of the second electrode auxiliary grid close to the tail end of the non-edge second electrode main grid.
Further, the polarity of the first electrode main grid is a positive electrode or a negative electrode.
Further, the sum of the number of the gate lines of the first electrode main gate and the number of the gate lines of the second electrode main gate is greater than or equal to 4.
In a second aspect, embodiments of the present invention provide a solar cell module, comprising a plurality of solder ribbons and any one of the above solar cells, wherein,
the welding strip connects the non-edge first electrode main grid of one solar cell in the two adjacent solar cells with the non-edge second electrode main grid of the other solar cell; and the edge first electrode main grid and the edge second electrode main grid in the solar cell are not connected with the solder strip.
Further, in two adjacent solar cells, the first electrode main grid of one solar cell is opposite to the second electrode cell main grid of the other solar cell, and the plurality of solder strips are parallel to each other.
Above-mentioned utility model's technical scheme of first aspect has following advantage or beneficial effect: the scheme provided by the embodiment of the utility model,
based on the fact that the first electrode auxiliary grid on the edge first electrode main grid penetrates through the nearest non-edge second electrode main grid to be connected with the nearest non-edge first electrode main grid, the nearest non-edge second electrode main grid is arranged in a non-continuous mode and enables the first electrode auxiliary grid to penetrate through the abdication, the edge first electrode main grid can transmit collected current to the nearest non-edge first electrode main grid, and therefore welding strips are not needed to be connected with the edge first electrode main grid. Similarly, based on the fact that the second electrode secondary grid on the edge second electrode main grid penetrates through the nearest non-edge first electrode main grid and is connected with the nearest non-edge second electrode main grid, the nearest non-edge first electrode main grid is arranged in a non-continuous mode and is used for enabling the second electrode secondary grid to penetrate through the abdication, the edge second electrode main grid can transmit the collected current to the nearest non-edge second electrode main grid, and therefore a welding strip is not needed to be connected with the edge second electrode main grid. And then in the manufacturing process of the solar cell module, the edge first electrode main grid and the edge second electrode main grid do not need to be welded, hidden crack risks brought to the solar cell by welding are avoided, the yield and the reliability of the solar cell module are improved, meanwhile, the edge current carrier collecting efficiency is high, and the excellent photoelectric conversion efficiency of the solar cell and the solar cell module can be ensured.
Drawings
FIG. 1 is a bottom view of a prior art IBC solar cell;
FIG. 2 is a bottom view of a prior art IBC solar cell provided with an insulating layer;
FIG. 3 is a schematic diagram of a prior art IBC solar module before two adjacent cells are soldered;
FIG. 4 is a schematic view of a partial structure of a prior art IBC solar cell module;
fig. 5 is a bottom view of a solar cell according to an embodiment of the present invention;
fig. 6 is a bottom view of a solar cell provided with an insulating layer according to another embodiment of the present invention;
fig. 7 is a schematic view of a solar cell module according to an embodiment of the present invention before two adjacent cells are welded;
fig. 8 is a schematic view of a solar cell module according to an embodiment of the present invention after two adjacent cells are welded.
The reference numbers are as follows:
10- -solar cell; 11- -first electrode main grid; 11 a-edge first electrode main grid;
11b- -non-edge first electrode main grid; 12- - -a second electrode main gate;
12 a-edge second electrode main grid; 12b- -non-edge second electrode main grid;
13-a first electrode subgrid; 14- -a second electrode subgrid; 15- - -an insulating layer; 20-solder strip
Detailed Description
In the following description and in the appended claims, the back side of the solar cell refers to the side facing away from the sun light for providing the back metal grid line electrode.
Fig. 1 is a bottom view of a prior art IBC solar cell; FIG. 2 is a bottom view of a prior art IBC solar cell provided with an insulating layer; FIG. 3 is a schematic diagram of a prior art IBC solar module before two adjacent cells are soldered; fig. 4 is a schematic diagram of a partial structure of an IBC solar cell module in the prior art. As shown in fig. 1 to 4, in the prior art, an electrode main grid line of an IBC solar cell 10 includes a first electrode main grid 11 and a second electrode main grid 12 located at the edge of the solar cell, a first electrode sub-grid 13 connected to the first electrode main grid 11, and a second electrode sub-grid 14 connected to the second electrode main grid 12. The first electrode main grid 11 and the second electrode main grid 12 are both continuous main grids, and the tail ends of the first electrode auxiliary grid 13 and the second electrode auxiliary grid 14 are both provided with insulating pieces 15. In the manufacturing process of the solar cell module, the solder strip 20 needs to be connected with the main grid of the electrode at the edge of the solar cell, so that the solder strip 20 covers the edge of the silicon wafer, at the moment, a large number of micro cracks exist at the edge of the silicon wafer, stress concentration can be caused in the welding process of the solder strip, the problem of cracking is caused, and the yield and the reliability of the solar cell module are reduced.
Although the above problem can be solved by moving the position of a part of the electrodes in the edge electrode main grid to a certain distance towards the inside of the battery, the solution has the problems of more complicated battery insulation condition, increased leakage risk and the like, and meanwhile, when the multi-main grid back contacts the battery, the space for the part of the electrodes to move towards the inside is smaller, so that the effectiveness and operability of the solution become lower.
In order to solve prior art's solar cell and in the subassembly manufacture process, weld the area and need cover the silicon chip edge, weld the stress concentration that arouses among the area welding process, lead to taking place the problem of lobe of a leaf, the embodiment of the utility model provides a solar cell can solve above-mentioned problem.
Specifically, as shown in fig. 5-8, an embodiment of the present invention provides a solar cell, including: the solar cell comprises a first electrode main grid 11, a second electrode main grid 12, a first electrode auxiliary grid 13 and a second electrode auxiliary grid 14, wherein the first electrode main grid 11 and the second electrode main grid 12 are alternately arranged on the back surface of the solar cell 10, the polarity of the second electrode main grid is opposite to that of the first electrode main grid 11, the first electrode auxiliary grid 13 is connected with the first electrode main grid 11, and the second electrode auxiliary grid 14 is connected with the second electrode main grid 12;
the first electrode main grids 11 comprise edge first electrode main grids 11a closest to the edge of the solar cell 10 and other non-edge first electrode main grids 11b, and the second electrode main grids 12 comprise edge second electrode main grids 12a closest to the edge of the solar cell 10 and other non-edge second electrode main grids 12b;
the non-edge second electrode main grid 12b nearest to the edge first electrode main grid 11a forms a non-continuous non-edge second electrode main grid 12b, and the first electrode auxiliary grid 13 on the edge first electrode main grid 11a penetrates through the non-continuous area of the non-continuous non-edge second electrode main grid 12b and is electrically connected with the first electrode auxiliary grid 13 on the non-edge first electrode main grid 11b nearest to the edge first electrode main grid 11 a;
the non-edge first electrode main grid 11b nearest to the edge second electrode main grid 12a forms a non-continuous non-edge first electrode main grid 11b, and the second electrode auxiliary grid 14 on the edge second electrode main grid 12a penetrates through the non-continuous region of the non-continuous non-edge first electrode main grid 11b and is electrically connected with the second electrode auxiliary grid 14 on the non-edge second electrode main grid 12b nearest to the edge second electrode main grid 12 a.
Based on the fact that the first electrode auxiliary grid 13 on the edge first electrode main grid 11 penetrates through the nearest non-edge second electrode main grid 12b to be connected with the nearest non-edge first electrode main grid 11b, wherein the nearest non-edge second electrode main grid 12b is arranged in a non-continuous mode and enables the first electrode auxiliary grid 13 to penetrate through a abdication position, the edge first electrode main grid 11a can transmit the collected current to the nearest non-edge first electrode main grid 11b, and therefore the welding strip 20 is not required to be connected with the edge first electrode main grid 11 a. Similarly, the second electrode sub-grid 14 on the edge second electrode main grid 12a passes through the nearest non-edge first electrode main grid 11b to be connected with the nearest non-edge second electrode main grid 12b, wherein the nearest non-edge first electrode main grid 11b is arranged discontinuously, and the edge second electrode main grid 12a can transmit the collected current to the nearest non-edge second electrode main grid 12b for the second electrode sub-grid 14 to pass through the abdication, so that the solder strip 20 is not required to be connected with the edge second electrode main grid 12 a.
The first electrode main grids 11 and the second electrode main grids 12 are arranged in parallel and at intervals along a first direction, and the first direction may be an extending direction of a side length of the solar cell. So arranged, the layout of the first electrode main grid 11 and the second electrode main grid 12 on the surface of the solar cell is facilitated.
Further, the first electrode sub-grids 13 and the second electrode sub-grids 14 are arranged in parallel and at intervals along a second direction intersecting the first direction, and a plurality of first electrode sub-grids 13 not directly connected with the edge first electrode main grid 11a and the non-edge first electrode main grid 11b and a plurality of second electrode sub-grids 14 not directly connected with the edge second electrode main grid 12a and the non-edge second electrode main grid 12b are arranged in an interdigital manner. Specifically, the first direction and the second direction are perpendicular to each other. The finger-shaped cross arrangement means that the electrode grid lines are arranged in a staggered interval manner to complement the gaps generated by continuous arrangement, and two opposite sides form a finger-shaped butt joint part.
Specifically, fig. 5 shows a schematic diagram of a cell structure of a solar cell according to an embodiment of the present invention, and it can be seen from fig. 5 that, since the non-edge second electrode main grid 12b closest to the edge first electrode main grid 11a and the non-edge first electrode main grid 11b closest to the edge second electrode main grid 12a are both discontinuously disposed, and the edge first electrode main grid 11a can collect current via the non-edge first electrode main grid 11b close to the first electrode main grid 11a through an electrical connection structure of the first electrode auxiliary grid 13 thereon (in other words, the edge first electrode main grid 11a transmits current to the closest non-edge first electrode main grid 11 b); the edge second electrode main gates 12a may collect current via the non-edge second electrode main gates 12b close to the second electrode main gates 12a (in other words, the edge second electrode main gates 12a transmit current to the nearest non-edge second electrode main gate 12 b) by the electrical connection structure of the second electrode sub-gates 14 disposed thereon. According to the arrangement, when the solar cell module is manufactured, the edge first electrode main grid 11a and the edge second electrode main grid 12a are not required to be welded, hidden crack risks brought to the solar cell by welding are avoided, the yield and the reliability of the solar cell module are improved, meanwhile, the edge current carrier collecting efficiency is high, and the excellent photoelectric conversion efficiency of the solar cell and the solar cell module can be guaranteed.
Further, the solar cell 10 further includes an insulating layer 15, wherein the insulating layer 15 is disposed in the non-electrode area of the discontinuous non-edge first electrode main grid 11b and the discontinuous non-edge second electrode main grid 12b, and the first electrode sub-grid 13 is close to the end of the non-edge first electrode main grid 11b, and the second electrode sub-grid 14 is close to the end of the non-edge second electrode main grid 12 b.
Specifically, fig. 6 shows a schematic diagram of an insulating layer structure of a solar cell according to an embodiment of the present invention, and as can be seen from fig. 6, an insulating layer 15 is disposed in an area where the non-continuous non-edge first electrode main grid 11b is penetrated by the second electrode sub-grid 14, and an area where the non-continuous non-edge second electrode main grid 12b is penetrated by the first electrode sub-grid, that is, an electrode-free area of the non-edge electrode main grid, and meanwhile, an insulating layer is disposed in an end position where the first electrode sub-grid 13 is close to the non-edge second electrode main grid 12b, and an end position where the second electrode main grid 14 is close to the non-edge first electrode main grid 11 b.
In the embodiment of the present invention, it is defined that the number of the first electrode sub-grids 13 connected to the non-edge first electrode main grid 11b on the edge first electrode main grid 11a is less than or equal to the total number of the first electrode sub-grids 13. Further, the number of the second electrode sub-gates 14 connected to the non-edge second electrode main gates 12b on the edge second electrode main gates 12a is less than or equal to the total number of the second electrode sub-gates 14. In conjunction with the above description, since the insulating layer is provided at the end position of the first electrode sub-gate 13 close to the non-edge first electrode main gate 11b, the second electrode sub-gate 14 close to the end position of the non-edge second electrode main gate 12 b. Therefore, by means of the arrangement, the use amount of subsequent insulating layer materials is reduced, the preparation efficiency of the solar cell module is improved, and the yield of the solar cell module is improved.
Further, the polarities of the first electrode main grid 11 and the second electrode main grid 12 are opposite, the first electrode main grid 11 may be a positive electrode or a negative electrode, and if the first electrode main grid 11 is a positive electrode, the corresponding second electrode main grid 12 is a negative electrode; if the first electrode main grid 11 is a negative electrode, the corresponding second electrode main grid 12 is a positive electrode.
Further, the sum of the number of gate lines of the first electrode main gate 11 and the number of gate lines of the second electrode main gate 12 is greater than or equal to 4. The first electrode main grid and the second electrode main grid are arranged in pairs, if the first electrode main grid comprises an edge first electrode main grid 11a and a non-edge first electrode main grid 11b, and the second electrode main grid 12 comprises an edge second electrode main grid 12a and a non-edge second electrode main grid 12b, the sum of the number of the grid lines of the first electrode main grid and the second electrode main grid is required to be greater than or equal to 4.
The embodiment of the utility model provides a scheme, pass to be connected with nearest non-edge first electrode main grid 11b apart from nearest non-edge second electrode main grid 12b based on the vice bars 13 of first electrode on the edge first electrode main grid 11a, wherein apart from nearest non-edge second electrode main grid 12a discontinuous setting, pass for first electrode auxiliary grid 13 and give way, edge first electrode main grid 11a can be carried the electric current of collecting for nearest non-edge first electrode main grid 11b, need not weld area 20 and edge first electrode main grid 11a and be connected like this. Similarly, the second electrode sub-grid 14 on the edge second electrode main grid 12a passes through the nearest non-edge first electrode main grid 11b and is connected with the nearest non-edge second electrode main grid 12b, wherein the nearest non-edge first electrode main grid 11b is discontinuously arranged, so that the edge second electrode main grid 12a can transmit the collected current to the nearest non-edge second electrode main grid 12b for the second electrode sub-grid 14 to pass through the abdication, and thus the solder strip 20 is not required to be connected with the edge second electrode main grid 12 a. With prior art in the subassembly manufacture process, weld and take 20 silicon chip edges that need cover, weld the stress concentration that arouses among the 20 welding processes in area, lead to taking place the problem of lobe of a leaf and compare, the utility model provides a solar cell, in the subassembly manufacture process, need not weld marginal first electrode main grid 11a and marginal second electrode main grid 12a, avoided the latent risk of splitting that the welding brought for solar cell, improved solar module's yields and reliability, simultaneously, edge carrier collection efficiency is high, can guarantee solar cell and solar module's good photoelectric conversion efficiency.
According to another aspect of the present invention, specifically, as shown in fig. 7 to 8, a solar cell module according to an embodiment of the present invention includes a plurality of solder ribbons 20 and any one of the solar cells 10, wherein,
the solder strip 20 connects the non-edge first electrode main grid 11b of one solar cell 10 of the two adjacent solar cells 10 with the non-edge second electrode main grid 12b of the other solar cell 10; among them, the edge first electrode main grids 11a and the edge second electrode main grids 12a in the solar cell 10 are not connected to the solder ribbon 20.
Specifically, fig. 7 the schematic diagram before the cell welding of the solar cell module according to the embodiment of the present invention can be seen from fig. 7, the polarities of the electrode main grids along the same horizontal direction in the adjacent solar cells 10 are opposite, and specifically, one solar cell can be rotated 180 ° and then placed side by side with another solar cell to ensure that the polarities of the electrode main grids along the same horizontal direction in the adjacent solar cells 10 are opposite.
In two adjacent solar cells 10, the first electrode main grid 11 of one solar cell 20 is opposite to the second electrode main grid 12 of the other solar cell 10, and the plurality of solder ribbons 20 are parallel to each other. This facilitates the solder ribbon 20 to connect the non-edge first electrode main grid 11b of one solar cell 10 of the two adjacent solar cells 10 with the non-edge second electrode main grid 12b of the other solar cell 10.
Specifically, the edge first electrode main gate 11a collects current via the non-edge first electrode main gate 11b near the edge first electrode main gate 11a by the electrical connection structure of the first electrode sub-gate 13;
the edge second electrode main gates 12b collect current via the non-edge second electrode main gates 12b near the edge second electrode main gates 12a by the electrical connection structure of the second electrode sub-gates 14.
In the solar cell and the solar cell module provided in the above embodiments, based on that the first electrode secondary grid on the edge first electrode main grid 11a passes through the nearest non-edge second electrode main grid 11b to be connected with the nearest non-edge first electrode main grid 11b, wherein the nearest non-edge second electrode main grid 12b is discontinuously arranged, in order that the first electrode secondary grid 13 passes through the abdication, the edge first electrode main grid 11a may transmit the collected current to the nearest non-edge first electrode main grid 11b, so that a solder strip is not required to be connected with the edge first electrode main grid 11 a. Similarly, the second electrode sub-grid 14 on the edge second electrode main grid 12a passes through the nearest non-edge first electrode main grid 11b and is connected with the nearest non-edge second electrode main grid 12b, wherein the nearest non-edge first electrode main grid 11b is discontinuously arranged, so that the edge second electrode main grid 12a can transmit the collected current to the nearest non-edge second electrode main grid 12b for the second electrode sub-grid 14 to pass through the abdication, and thus the solder strip 20 is not required to be connected with the edge second electrode main grid 12 a. With prior art in the subassembly manufacture process, weld and take 20 silicon chip edges that need cover, weld the stress concentration that arouses among the 20 welding process of area, lead to taking place the problem of lobe of a leaf and compare, the utility model provides a solar module, in solar module manufacture process, need not weld edge first electrode owner bars 11a and edge second electrode owner bars 12a, avoided the latent risk of splitting that the welding brought for solar cell, improved solar module's yields and reliability, simultaneously, edge current carrier collection efficiency is high, can guarantee solar cell and solar module's good photoelectric conversion efficiency.
The above description is provided only to help understand the structure and core idea of the present invention. For those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A solar cell, comprising:
the solar cell comprises a first electrode main grid (11) and a second electrode main grid (12) which are alternately arranged on the back surface of a solar cell (10) and have opposite polarities to the first electrode main grid (11), a first electrode auxiliary grid (13) connected with the first electrode main grid (11), and a second electrode auxiliary grid (14) connected with the second electrode main grid (12);
the first electrode main grids (11) comprise edge first electrode main grids (11 a) nearest to the edges of the solar cell (10) and other non-edge first electrode main grids (11 b), and the second electrode main grids (12) comprise edge second electrode main grids (12 a) nearest to the edges of the solar cell (10) and other non-edge second electrode main grids (12 b);
wherein the non-edge second electrode main grid (12 b) nearest to the edge first electrode main grid (11 a) forms a non-continuous non-edge second electrode main grid (12 b), and the first electrode auxiliary grid (13) on the edge first electrode main grid (11 a) penetrates through the discontinuous region of the non-continuous non-edge second electrode main grid (12 b) and is electrically connected with the first electrode auxiliary grid (13) on the non-edge first electrode main grid (11 b) nearest to the edge first electrode main grid (11 a);
the non-edge first electrode main grid (11 b) nearest to the edge second electrode main grid (12 a) forms a non-continuous non-edge first electrode main grid (11 b), and the second electrode auxiliary grid (14) on the edge second electrode main grid (12 a) penetrates through the discontinuous area of the non-continuous non-edge first electrode main grid (11 b) and is electrically connected with the second electrode auxiliary grid (14) on the non-edge second electrode main grid (12 b) nearest to the edge second electrode main grid (12 a).
2. The solar cell according to claim 1, characterized in that the first electrode main grid (11) and the second electrode main grid (12) are arranged parallel to and spaced apart from each other along a first direction.
3. The solar cell according to claim 2, wherein the first electrode subgrid (13) and the second electrode subgrid (14) are arranged in parallel and spaced apart from each other along a second direction intersecting the first direction, and a plurality of first electrode subgrids (13) not directly connecting the edge first electrode main grid (11 a) and the non-edge first electrode main grid (11 b) are arranged in an interdigitated arrangement with a plurality of second electrode subgrids (14) not directly connecting the edge second electrode main grid (12 a) and the non-edge second electrode main grid (12 b).
4. Solar cell according to claim 1, characterized in that the number of first electrode sub-grids (13) on the edge first electrode main grid (11 a) connected to the non-edge first electrode main grid (11 b) is smaller than or equal to the total number of first electrode sub-grids (13).
5. The solar cell according to claim 1, wherein the number of second electrode subgrids (14) on the edge second electrode main grid (12 a) connected to the non-edge second electrode main grid (12 b) is less than or equal to the total number of second electrode subgrids (14).
6. The solar cell according to claim 1, wherein the solar cell (10) further comprises an insulating layer (15), wherein the insulating layer (15) is disposed in an electrode-free region of the discontinuous non-edge first electrode main grid (11 b), an electrode-free region of the discontinuous non-edge second electrode main grid (12 b), and a position of the first electrode sub-grid (13) near an end of the non-edge first electrode main grid (11 b) and a position of the second electrode sub-grid (14) near an end of the non-edge second electrode main grid (12 b).
7. Solar cell according to claim 1, characterized in that the polarity of the first electrode main grid (11) is positive or negative.
8. The solar cell according to claim 1, wherein a sum of the number of the gate lines of the first electrode main grid (11) and the number of the gate lines of the second electrode main grid (12) is greater than or equal to 4.
9. A solar cell module comprising a plurality of solder ribbons (20) and a plurality of solar cells (10) according to any one of claims 1 to 8,
the solder strip (20) connects the non-edge first electrode main grid (11 b) of one solar cell (10) of two adjacent solar cells (10) with the non-edge second electrode main grid (12 b) of the other solar cell (10); wherein the edge first electrode main grid (11 a) and the edge second electrode main grid (12 a) in the solar cell (10) are not connected with the solder strip (20).
10. The solar cell module as claimed in claim 9,
in two adjacent solar cells (10), the first electrode main grid (11) of one solar cell (10) is opposite to the second electrode main grid (12) of the other solar cell (10), and the plurality of solder strips (20) are parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222595709.3U CN218788381U (en) | 2022-09-29 | 2022-09-29 | Solar cell and solar cell module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222595709.3U CN218788381U (en) | 2022-09-29 | 2022-09-29 | Solar cell and solar cell module |
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| CN218788381U true CN218788381U (en) | 2023-04-04 |
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| CN202222595709.3U Active CN218788381U (en) | 2022-09-29 | 2022-09-29 | Solar cell and solar cell module |
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