Solar cell and photovoltaic module
By using the first and second fine gates of the burn-through gate lines in the solar cell, the current is drawn by using the electrical connection point and the intersection point, the problem of blackening of the harp estuary position EL is solved, and cost reduction and conductive reliability are improved.
Patent Information
- Application Number
- CN202311020361.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-14
- Publication Date
- 2025-02-25
AI Technical Summary
In existing solar cells, the harpoon location is prone to the problem of EL blackening.
The first and second fine gates of the burn-through gate line are used to draw out carriers or currents through electrical connection points and intersection points, replacing the traditional pads, and forming a new gate structure.
It effectively reduces the EL blackening problem caused by the gate lines that cannot be burned through, and at the same time reduces the cost of solar cells, improves the conductivity reliability, and simplifies the installation of welding tape.
Smart Images
Figure CN119521845A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of photovoltaic technology, in particular to a solar cell and a photovoltaic module. Background Art
[0002] Solar cells can convert light energy into electrical energy, making full use of renewable clean energy. Therefore, they have broad application prospects.
[0003] In order to reduce hidden cracks in welding, current solar cells are usually provided with harpoon holes at the welding positions.
[0004] However, the position where the harpoon mouth is set is prone to EL (Electroluminescence) blackening. Summary of the invention
[0005] The present application aims to provide a solar cell and a photovoltaic module, which at least solve the problem of EL blackening at the mouth of the harpoon.
[0006] In order to solve the above technical problems, this application is implemented as follows:
[0007] In a first aspect, an embodiment of the present application provides a solar cell, comprising:
[0008] A battery body and a grid structure disposed on a first surface thereof;
[0009] The gate structure comprises: a plurality of first fine gates and a plurality of second fine gates; each of the first fine gates is arranged in an array along the direction of rows and columns; the extension direction of the first fine gates is parallel to the direction in which the rows are located;
[0010] A first fine gate is electrically connected to at least one first fine gate in an adjacent column and a different row through at least one second fine gate;
[0011] Among all the second fine grids electrically connected to two first fine grids in the same column and adjacent rows, there are at least two intersecting second fine grids;
[0012] The first fine grid and the second fine grid are both burn-through type grid lines.
[0013] Optionally, one first fine gate is electrically connected to at least two first fine gates in adjacent columns and different rows through at least two second fine gates.
[0014] Optionally, one first fine gate is electrically connected to at least two first fine gates in adjacent columns and rows through at least two second fine gates.
[0015] Optionally, the second fine grids intersecting at an intersection and the intersection are all evenly distributed;
[0016] And / or, the position where the first fine gate and the second fine gate are electrically connected is an electrical connection point, and the first fine gate electrically connected to the same electrical connection point, all the second fine gates and the electrical connection point are all arranged in parallel.
[0017] Optionally, all of the second fine grids are straight lines.
[0018] Optionally, all of the second fine grids are curved.
[0019] Optionally, among all the second fine grids, at least one of the second fine grids is in a curved shape, and the remaining second fine grids are in a straight line shape.
[0020] Optionally, a slurry composition of the second fine grid is the same as a slurry composition of the first fine grid.
[0021] In a second aspect, an embodiment of the present application provides a photovoltaic module, which includes: a plurality of any of the aforementioned solar cells.
[0022] Optionally, the photovoltaic module further comprises: a welding strip extending along the direction of the column; the position where the first fine grid and the second fine grid are electrically connected is an electrical connection point;
[0023] The welding strip is electrically connected to the intersection of the intersecting second fine grids, and / or the welding strip is electrically connected to the electrical connection point.
[0024] In the embodiment of the present application, the first fine grid and the second fine grid are both burn-through type grid lines, so the first fine grid and the second fine grid can both collect carriers in the solar cell, which can reduce the problem of EL blackening caused by grid lines that cannot be burnt through. Moreover, a first fine grid is electrically connected to at least one first fine grid in an adjacent column and a different row through at least one second fine grid, and the current collected by each first fine grid and each second fine grid can be subsequently led to the outside of the solar cell through the electrical connection point where the first fine grid and the second fine grid are electrically in contact, that is, the electrical connection point of the first fine grid and the second fine grid here plays the role of a pad, and then no pad is required, which can reduce the cost of the solar cell, and the first fine grid and the second fine grid also play the role of a main grid, and then the grid structure does not need a main grid, and all grid lines are burn-through type grid lines, which can reduce the problem of EL blackening caused by grid lines that cannot be burnt through. Among all the second fine grids electrically connected to the two first fine grids in the same column and adjacent rows, there are at least two intersecting second fine grids. Therefore, the second fine grids can be used to collect carriers or currents on the first fine grids electrically connected thereto, and lead the collected current to the outside of the solar cell through the intersection of the intersecting second fine grids. In other words, the intersection here also plays the role of a welding pad, and thus no welding pad is required, which can reduce the cost of the solar cell. The second fine grid here also plays the function of a main grid, and thus the grid structure does not require a main grid, and all grid lines are burn-through type grid lines, which can reduce the problem of EL blackening caused by grid lines that cannot be burnt through. At the same time, a first fine grid is electrically connected to at least one first fine grid in an adjacent column and different row through at least one second fine grid. In the direction of the column, there will be blank spaces where no grid lines are set at the first first fine grid and the last first fine grid. This is usually the starting point of welding, so at the above blank positions, hidden cracks can be reduced. The number of first fine grids is large, the number of second fine grids is also large, the number of electrical connection points between the first fine grids and the second fine grids is large, and the number of intersections of each second fine grid is large. Current is derived through the above-mentioned electrical connection points and / or intersections. Due to the large number of electrical connection points and intersections, when one electrical connection point or one intersection fails, other electrical connection points and intersections can still conduct the carriers or current on the grid lines electrically connected to them, which can improve the conductivity reliability. Moreover, due to the large number of electrical connection points and intersections, the welding strip only needs to be electrically connected to at least one electrical connection point or at least one intersection in the direction of each row. The setting position range of the welding strip is wide, which can reduce the difficulty of welding strip alignment. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.
[0026] Figure 1 A schematic diagram of a solar cell in the prior art is shown;
[0027] Figure 2 A schematic diagram of a solar cell according to an embodiment of the present invention is shown.
[0028] Figure numerals: 11 - harpoon mouth, 12 - main grid, 13 - pad, 14 - battery body, 15 - first fine grid, 16 - second fine grid, 17 - electrical connection point, 161 - intersection. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] Figure 1 A schematic diagram of a solar cell in the prior art is shown. Figure 1 The inventors found that the existing harpoon mouth position is prone to EL blackening problem because: the harpoon mouth 11 position has a long transmission distance, and the harpoon mouth 11 itself is formed by the main grid 12, which lacks burn-through corrosion and cannot lead out photogenerated carriers, resulting in the inability to lead out photogenerated carriers at the harpoon mouth 11 position, which will cause EL blackening. In the existing solar cell, a pad 13 is provided on the main grid 12, and the current on the main grid 12 is led out through the pad 13.
[0031] Figure 2 FIG. 1 is a schematic diagram of a solar cell according to an embodiment of the present invention. Figure 2, the solar cell may include: a cell body 14, and a gate structure arranged on the first surface of the cell body 14. The cell body 14 here has a pn junction and has carriers during use. The cell body may contain a silicon substrate, and the doping type of the silicon substrate is not limited. For example, the silicon substrate may be n-type doped or p-type doped. In the present invention, the structure of the cell body is not limited. For example, the cell body 14 may be a TOPCon (Tunnel Oxide Passivated Contact) solar cell, or a heterojunction solar cell or a PERC (Passivated Emitter and Rear Cell) solar cell. For example, the solar cell may be an n-type TOPCon solar cell. The first surface here refers to the surface of the cell body 14 on which the gate structure is arranged. The first surface here may be the light-facing surface of the cell body 14, or the backlight surface of the cell body 14, or the light-facing surface and the backlight surface of the cell body 14. The light-facing surface of the cell body 14 refers to the surface that mainly receives light during its normal operation, and the backlight surface is opposite to the light-facing surface. The gate structure here is used to collect and lead out the carriers or current in the battery body 14 .
[0032] Reference Figure 2 The gate structure of the present invention may include: a plurality of first fine gates 15 and a plurality of second fine gates 16. The first fine gates 15 and the second fine gates 16 are both burn-through type gate lines, so the first fine gates 15 and the second fine gates 16 and the carriers or currents near the first fine gates 15 and the second fine gates 16 can be collected by the first fine gates 15 and the second fine gates 16, which can reduce the problem of EL blackening caused by the gate lines that cannot be burnt through.
[0033] In the present invention, the materials of the first fine grid 15 and the second fine grid 16 are not limited. For example, the materials of the first fine grid 15 and the second fine grid 16 can both be silver.
[0034] Figure 2 In the figure, the direction indicated by L1 is the direction of the row, and the direction indicated by L2 is the direction of the column. The first fine gates 15 are arranged in an array along the direction of the row and the column. For example, in the direction L1 where the row is located, a plurality of first fine gates 15 are collinear, and in the direction L2 where the column is located, a plurality of first fine gates 15 are parallel. It should be noted that in the direction L1 where the row is located, a plurality of first fine gates 15 may not be completely collinear, and may have a slight deviation. For example, in the same row, the spacing between the first fine gates 15 of adjacent columns in the direction where the column is located is less than or equal to 0.5 microns. The extension direction of the first fine gate 15 is parallel to the direction L1 where the row is located. The plurality of first fine gates 15 here refer to the first fine gates 15 whose distribution positions meet the requirements among all the first fine gates 15.
[0035] A first fine grid 15 is electrically connected to at least one first fine grid 15 in an adjacent column and a different row through at least one second fine grid 16. The second fine grid 16 here realizes the conduction of carriers or currents on each first fine grid 15 electrically connected thereto. Subsequently, the current collected by each first fine grid 15 and each second fine grid 16 can be led out to the outside of the solar cell through the electrical connection point 17 where the first fine grid 15 and the second fine grid 16 are electrically contacted. That is to say, the electrical connection point 17 of the first fine grid 15 and the second fine grid 16 here plays the role of a welding pad, and thus no welding pad is required, which can reduce the cost of the solar cell. The first fine grid 15 and the second fine grid 16 here also play the role of a main grid, and thus the gate structure does not need a main grid, and all gate lines are burn-through type gate lines, which can reduce the problem of EL blackening caused by gate lines that cannot be burnt through. In the direction L2 where the columns are located, there are blank spaces where no gate lines are set at the first first fine grid 15 and the last first fine grid 15 , which are usually welding points. Therefore, hidden cracks can be reduced at the blank positions.
[0036] like, Figure 2 In the figure, from top to bottom and from left to right, the first fine gate 15 at the first row and the first column is electrically connected to the first fine gate 15 at the second row and the second column and the first fine gate 15 at the third row and the second column respectively through two second fine gates 16. The two second fine gates 16 can realize the extraction of carriers or currents of the first fine gate 15 at the first row and the first column, the first fine gate 15 at the second row and the second column, and the first fine gate 15 at the third row and the second column electrically connected thereto. Subsequently, the current collected by the first fine grid 15 and the two second fine grids 16 can be led out to the outside of the solar cell through the electrical connection point 17 of the first fine grid 15 at the first row and the first column and the second fine grid 16 electrically connected thereto. That is to say, the electrical connection point 17 here plays the role of a soldering pad, and thus no soldering pad is required, which can reduce the cost of the solar cell. The first fine grid 15 and the second fine grid 16 also play the role of a main grid, and thus the grid structure does not need a main grid, and all grid lines are burn-through type grid lines, which can reduce the problem of EL blackening caused by grid lines that cannot be burnt through. In addition, in the direction L2 where the first column is located, there will be blank spaces where no grid lines are set at the two second fine grids 16 intersecting near the first fine grid 15 and the two second fine grids 16 intersecting near the last first fine grid 15. This is usually the starting point of welding, so hidden cracks can be reduced at the above blank positions.
[0037] Among all the second fine grids 16 electrically connected to the two first fine grids 15 in the same column and adjacent rows, there are at least two intersecting second fine grids 16. Subsequently, the current collected by each second fine grid 16 can be led out to the outside of the solar cell through the intersection 161 of the intersecting second fine grids 16. In other words, the intersection 161 of the intersecting second fine grids 16 here plays the role of a welding pad, and thus no welding pad is required, which can reduce the cost of the solar cell. The second fine grid 16 here also plays the function of a main grid, and thus the gate structure does not need a main grid, and all grid lines are burn-through type grid lines, which can reduce the problem of EL blackening caused by grid lines that cannot be burnt through.
[0038] For example, Figure 2 In the figure, from top to bottom and from left to right, two second fine grids 16 electrically connected to the first fine grid 15 at the first row and first column and one of the two second fine grids 16 electrically connected to the first fine grid 15 at the first row and first column form two intersections 161. Subsequently, the carriers or currents on the first fine grid 15 at the first row and first column, the first fine grid 15 at the first row and first column, and the three intersecting second fine grids 16 can be led out to the outside of the solar cell through these two intersections 161. That is to say, the intersection 161 here plays the role of a welding pad, and thus no welding pad is required, which can reduce the cost of the solar cell. The second fine grid 16 also plays the function of a main grid, and thus the gate structure does not need a main grid, and all gate lines are burn-through type gate lines, which can reduce the problem of EL blackening caused by gate lines that cannot be burnt through.
[0039] In summary, in the embodiment of the present application, the first fine grid 15 and the second fine grid 16 are both burn-through type grid lines, so the first fine grid 15 and the second fine grid 16 can collect carriers in the solar cell, which can reduce the problem of EL blackening caused by the grid lines that cannot be burned through. Moreover, a first fine grid 15 is electrically connected to at least one first fine grid 15 in an adjacent column and a different row through at least one second fine grid 16, and the current collected by each first fine grid 15 and each second fine grid 16 can be subsequently led to the outside of the solar cell through the electrical connection point 17 of the first fine grid 15 and the second fine grid 16, that is, the electrical connection point 17 of the first fine grid 15 and the second fine grid 16 here plays the role of a pad, and then no pad is required, which can reduce the cost of the solar cell, and the first fine grid 15 and the second fine grid 16 also play the function of a main grid, and then the grid structure does not need a main grid, and all grid lines are burn-through type grid lines, which can reduce the problem of EL blackening caused by the grid lines that cannot be burned through. Among all the second fine grids 16 electrically connected to the two first fine grids 15 in the same column and adjacent rows, there are at least two intersecting second fine grids 16. Therefore, the second fine grids 16 can be used to collect carriers or currents on the first fine grids 15 electrically connected thereto, and lead the collected current to the outside of the solar cell through the intersection 161 of the intersecting second fine grids 16. In other words, the intersection 161 here also plays the role of a welding pad, and thus no welding pad is required, which can reduce the cost of the solar cell. The second fine grid 16 here also plays the function of a main grid, and thus the gate structure does not require a main grid, and all gate lines are burn-through type gate lines, which can reduce the problem of EL blackening caused by gate lines that cannot be burnt through. At the same time, a first fine grid 15 is electrically connected to at least one first fine grid 15 in an adjacent column and a different row through at least one second fine grid 16. In the direction of the column, there will be blank spaces where no grid lines are set at the first and last first fine grids 15, which are usually welding points. Therefore, hidden cracks can be reduced at the blank positions. There are a large number of first fine grids 15 and a large number of second fine grids 16. There are a large number of electrical connection points 17 between the first fine grids 15 and the second fine grids 16, and a large number of intersections 161 of each second fine grid 16. Current is derived through the above-mentioned electrical connection points 17 and / or intersections 161. Due to the large number of electrical connection points 17 and intersections 161, when one electrical connection point 17 or one intersection 161 fails, other electrical connection points 17 and intersections 161 can still conduct carriers or currents on the grid lines electrically connected thereto, thereby improving the conductivity reliability. Moreover, since there are a large number of electrical connection points 17 and intersection points 161, the soldering strip only needs to be electrically connected to at least one electrical connection point 17 or at least one intersection point 161 in the direction of each row. The soldering strip can be set in a wider range of positions, which can reduce the difficulty of soldering strip alignment.
[0040] It should be noted that in a solar cell, there is no limitation on how many second fine grids 16 a first fine grid 15 passes through to be electrically connected to first fine grids 15 in adjacent columns and different rows, and there is no limitation on whether the number of second fine grids 16 electrically connected to each first fine grid 15 is equal. There is no limitation on which row or rows of first fine grids 15 a first fine grid 15 passes through to be electrically connected to. For example, Figure 2 In one solar cell, two second fine grids 16 are connected to each first fine grid 15. For another example, in one solar cell, two second fine grids 16 are connected to one first fine grid 15, and three second fine grids 16 are connected to the first fine grids 15 in the adjacent rows of the same column. For another example, in one solar cell, one first fine grid 15 is electrically connected to two first fine grids 15 in the adjacent column, the next row, and the next two rows through the two second fine grids 16 electrically connected thereto, and another first fine grid 15 is electrically connected to three first fine grids 15 in the adjacent column, the next 3 rows, the next 5 rows, and the next 6 rows through the three second fine grids 16 electrically connected thereto.
[0041] Optionally, a first fine gate 15 is electrically connected to at least two first fine gates 15 in adjacent columns and different rows through at least two second fine gates 16, so that the number of electrical connection points 17 between the first fine gate 15 and the second fine gate 16 is large, and the conductive reliability is better.
[0042] For example, Figure 2 In the embodiment, each first fine gate 15 is electrically connected to at least two first fine gates 15 in adjacent columns and different rows through at least two second fine gates 16 .
[0043] Optionally, a first fine grid 15 is electrically connected to at least two first fine grids 16 in adjacent columns and adjacent rows through at least two second fine grids 16. The number of electrical connection points 17 between the first fine grid 15 and the second fine grid 16 is large, and the conductivity reliability is better. At the same time, the distance spanned by the second fine grid 16 is short, and the length of the second fine grid 16 is short, which can reduce the cost. The adjacent rows here specifically refer to the first fine grid 15 adjacent to the column and each of the two rows above it, or the first fine grid 15 adjacent to the column and each of the two rows below it, or the first fine grid 15 adjacent to the column and a row above it and a row below it.
[0044] For example, Figure 2 In the order from top to bottom, each first fine gate 15 in the first row or the first line is electrically connected to two first fine gates 15 in each of the two rows below the adjacent column through two second fine gates 16. Figure 2In the order from top to bottom, that is, in the direction L2 where the columns are located, each first fine gate 15 in the last row or tail row is electrically connected to the two first fine gates 15 in each of the two rows above the adjacent column through two second fine gates 16. Figure 2 In the order from top to bottom, except for the first row and the last row, that is, except for the first row and the last row, each first fine gate 15 is electrically connected to the two first fine gates 15 in the adjacent column, the row above it and the row below it through two second fine gates 16.
[0045] Optionally, the second fine grids 16 intersecting at an intersection 161 and the intersection 161 are arranged evenly, so there is almost no height difference between the intersection 161 and the surrounding second fine grids 16, which can reduce hidden cracks. Figure 2 In the figure, two second fine grids 16 intersect at the intersection 161 on the upper left side, and the intersection 161 is evenly distributed. When a welding strip is laid and welded on the intersection 161, since there is almost no height difference between the intersection 161 and the second fine grids 16 around it, hidden cracks can be reduced.
[0046] Optionally, the position where the first fine gate 15 and the second fine gate 16 are electrically connected is an electrical connection point, and the first fine gate 15, all the second fine gates 16 and the electrical connection point 17 electrically connected to the same electrical connection point 17 are arranged flush, so there is almost no height difference between the electrical connection point 17 and the surrounding second fine gates 16 and first fine gates 15, which can reduce hidden cracks. Figure 2 In the figure, two second fine grids 16 and one first fine grid 15 electrically connected at the electrical connection point 17 on the upper left side, and the electrical connection point 17 are evenly distributed. When a welding strip is laid and welded on the electrical connection point 17, there is almost no height difference between the intersection electrical connection point 17 and the second fine grids 16 and the first fine grids 15 around it, so hidden cracks can be reduced.
[0047] Optional, see Figure 2 All the second fine grids 16 are straight-line shaped, and the straight line between two points is the shortest. The length of the second fine grids 16 is short, which can save costs.
[0048] Optionally, all the second fine grids 16 are curved, and the shapes of the second fine grids 16 are flexible and varied.
[0049] Optionally, among all the second fine grids 16, at least one second fine grid 16 is curved, and the remaining second fine grids 16 are all straight lines, and the straight lines and curves are used together to take into account both cost and flexibility. Here, the number of curved second fine grids 16 and the number of straight second fine grids 16 are not limited in size.
[0050] Optionally, the slurry composition of the second fine grid 16 is the same as that of the first fine grid 15 , and the second fine grid 16 and the first fine grid 15 can be set at one time, which can simplify the process, save work time, and improve production efficiency.
[0051] The present invention also provides a photovoltaic module, which includes a plurality of any of the aforementioned solar cells. The photovoltaic module may also include: packaging films located on opposite sides of the solar cell, etc., the packaging film on the light-facing side of the solar cell may also be provided with a cover plate, and the packaging film on the backlight side of the solar cell may also be provided with a back plate, etc., which are not specifically limited.
[0052] Optionally, the photovoltaic module may also include: a welding strip extending along the direction of the aforementioned column, the welding strip being electrically connected to the intersection 161 of the intersecting second fine grids 16, the intersection 161 acting as a welding pad, and thus no welding pad is required, which can reduce the cost of the solar cell. At the same time, the number of the first fine grids 15 is large, the number of the second fine grids 16 is also large, the number of the first fine grids 15 is large, and the number of the intersections 161 of each second fine grid 16 is large. The current is derived through the above-mentioned intersections 161. Due to the large number of intersections 161, in the event of failure of one intersection 161, the other intersections 161 can still conduct the carriers or current on the grid line electrically connected thereto, which can improve the conductivity reliability. Moreover, due to the large number of intersections 161, the welding strip only needs to be electrically connected to at least one intersection 161 in the direction of each row, and the setting position range of the welding strip is wide, which can reduce the difficulty of welding strip alignment.
[0053] Optionally, and / or, the position where the first fine grid 15 and the second fine grid 16 are electrically connected is the electrical connection point 17, and the welding strip is electrically connected to the electrical connection point 17, and the electrical connection point 17 acts as a welding pad, thereby eliminating the need for a welding pad, which can reduce the cost of the solar cell. At the same time, the number of first fine grids 15 is large, and the number of second fine grids 16 is also large. The number of electrical connection points 17 of the first fine grids 15 and the second fine grids 16 is large, and the number of intersections 161 of each second fine grid 16 is large. Current is derived through the above-mentioned electrical connection points 17 and / or intersections 161. Due to the large number of electrical connection points 17 and intersections 161, when one electrical connection point 17 or one intersection 161 fails, other electrical connection points 17 and intersections 161 can still conduct carriers or currents on the grid lines electrically connected to them, thereby improving the conductivity reliability. Moreover, since there are a large number of electrical connection points 17 and intersection points 161, the soldering strip only needs to be electrically connected to at least one electrical connection point 17 or at least one intersection point 161 in the direction of each row. The soldering strip can be set in a wider range of positions, which can reduce the difficulty of soldering strip alignment.
[0054] It should be noted that the aforementioned solar cells and photovoltaic modules can refer to each other in their related parts and can achieve the same or similar effects. In order to avoid repetition, the related parts are briefly described.
[0055] It should be noted that, for the method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the described order of actions, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.
[0056] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0057] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.
[0058] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.
Claims
1. A solar cell, characterized in that: include: A battery body and a grid structure disposed on a first surface thereof; The gate structure comprises: a plurality of first fine gates and a plurality of second fine gates; each of the first fine gates is arranged in an array along the direction of rows and columns; the extension direction of the first fine gates is parallel to the direction in which the rows are located; A first fine gate is electrically connected to at least one first fine gate in an adjacent column and a different row through at least one second fine gate; Among all the second fine grids electrically connected to two first fine grids in the same column and adjacent rows, there are at least two intersecting second fine grids; The first fine grid and the second fine grid are both burn-through type grid lines.
2. The solar cell according to claim 1, characterized in that A first fine grid is electrically connected to at least two first fine grids in adjacent columns and different rows through at least two second fine grids.
3. The solar cell according to claim 2, characterized in that: A first fine gate is electrically connected to at least two first fine gates in adjacent columns and rows through at least two second fine gates.
4. The solar cell according to any one of claims 1 to 3, characterized in that: The second fine grids intersecting at an intersection and the intersection are all evenly distributed; And / or, the position where the first fine gate and the second fine gate are electrically connected is an electrical connection point, and the first fine gate electrically connected to the same electrical connection point, all the second fine gates and the electrical connection point are all arranged in parallel.
5. The solar cell according to any one of claims 1 to 3, characterized in that: All the second fine grids are in a straight line shape.
6. The solar cell according to any one of claims 1 to 3, characterized in that: All of the second fine grids are in a curved shape.
7. The solar cell according to any one of claims 1 to 3, characterized in that: Among all the second fine grids, at least one of the second fine grids is in a curved shape, and the remaining second fine grids are in a straight line shape.
8. The solar cell according to any one of claims 1 to 3, characterized in that: The slurry composition of the second fine grid is the same as the slurry composition of the first fine grid.
9. A photovoltaic module, characterized in that: include: A solar cell as claimed in any one of claims 1 to 8.
10. The photovoltaic module according to claim 9, characterized in that: Also includes: A welding strip extending along the direction of the column; the position where the first fine grid and the second fine grid are electrically connected is an electrical connection point; The welding strip is electrically connected to the intersection of the intersecting second fine grids, and / or the welding strip is electrically connected to the electrical connection point.