CN215869408U - Grid line electrode of solar cell and solar cell - Google Patents
Grid line electrode of solar cell and solar cell Download PDFInfo
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- CN215869408U CN215869408U CN202121681508.4U CN202121681508U CN215869408U CN 215869408 U CN215869408 U CN 215869408U CN 202121681508 U CN202121681508 U CN 202121681508U CN 215869408 U CN215869408 U CN 215869408U
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Abstract
The utility model discloses a grid line electrode of a solar cell and the solar cell, wherein the grid line electrode of the solar cell comprises: a main gate and a fine gate. The number of the main grids is multiple, the main grids are arranged at intervals along a first direction, and the first direction is parallel to the width direction of the main grids; the fine grids are arranged in a wave shape along the first direction, the fine grids are multiple, the fine grids are arranged at intervals along the second direction, the second direction is parallel to the length direction of the main grids, and each of the main grids is connected with any one of the fine grids. The solar cell includes a gate line electrode of the solar cell. The grid line electrode of the solar cell and the solar cell have the advantages of easiness in processing, stable structure and the like, and have remarkable effects of improving local discontinuity and uneven height of fine grids.
Description
Technical Field
The utility model relates to the technical field of solar cells, in particular to a grid line electrode of a solar cell and the solar cell.
Background
Solar panels are devices that convert solar radiation energy directly or indirectly into electrical energy through the photoelectric or photochemical effect by absorbing sunlight. The grid lines of the solar cell function to collect and conduct current. In the related art, when the surface of the solar cell is subjected to external friction, that is, the surface of the solar cell is under the action of external stress parallel to the plane of the cell, the thin grid of the electrode of the solar cell is easily deformed, so that the bonding force between the thin grid and the cell substrate is remarkably weakened, and the phenomena of grid breakage and even grid line falling occur.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the utility model provides a grid line electrode of a solar cell, which has the advantages of easiness in processing, stable structure and the like.
The embodiment of the utility model also provides a solar cell, and the electrode of the solar cell has the advantages of easiness in processing, stable structure and the like
The grid line electrode of the solar cell according to the embodiment of the present invention includes:
the main grids are arranged at intervals along a first direction, and the first direction is parallel to the width direction of the main grids; and
the fine grids are arranged in a wave shape along the first direction, the number of the fine grids is multiple, the fine grids are arranged at intervals along the second direction, the second direction is parallel to the length direction of the main grids, and each of the main grids is connected with any one of the fine grids.
According to the grid line electrode of the solar cell, the fine grid is arranged in a wave shape and provided with the arc line sections, when external force is applied to one position of the fine grid, the external force can be dispersed to other adjacent positions, namely, the fine grid can disperse the external force applied to the position, so that the fine grid can bear larger force, and therefore, when external stress is applied to the fine grid, the grid of the cell is not prone to being broken or being separated.
Therefore, the grid line electrode of the solar cell provided by the embodiment of the utility model has the advantages of stable structure and difficulty in damage.
In some embodiments, an included angle between the width direction of the fine grid and the second direction is greater than or equal to 0 ° and less than or equal to 45 °.
In some embodiments, the fine grid comprises a plurality of segments, the main grid is connected between two adjacent segments, the segments comprise at least one arc segment, and the arc segments of the segments are connected with at least one main grid.
In some embodiments, the segment further comprises at least one buffer segment, one end of the buffer segment of the segment is connected to one of the main gates, and the other end of the buffer segment of the segment is connected to the arc segment of the segment.
In some embodiments, the segment between two adjacent main grids comprises a first arc segment and a second arc segment, one end of the first arc segment of the segment is connected with one of the two adjacent main grids, the other end of the first arc segment of the segment is connected with one end of the second arc segment of the segment, and the other end of the second arc segment of the segment is connected with the other of the two adjacent main grids.
In some embodiments, the segment between two adjacent main gates further includes a first buffer segment and a second buffer segment, one end of the first buffer segment of the segment is connected to the one of the two adjacent main gates, the other end of the first buffer segment of the segment is connected to the one end of the first arc segment of the segment, one end of the second buffer segment of the segment is connected to the other of the two adjacent main gates, and the other end of the second buffer segment of the segment is connected to the other end of the second arc segment of the segment.
In some embodiments, the grid line electrode of the solar cell of the embodiments of the present invention further includes a plurality of straight line segments, one end of each straight line segment is connected to one of two adjacent fine grids, and the other end of each straight line segment is connected to the other of two adjacent fine grids.
In some embodiments, two adjacent straight line segments connected to one fine grid are arranged at intervals in the first direction, one of the two adjacent straight line segments connected to one fine grid is located on one side of the one fine grid in the second direction, and the other of the two adjacent straight line segments connected to one fine grid is located on the other side of the one fine grid in the second direction.
In some embodiments, the material of each of the main gate and the fine gate is copper or a copper alloy, and each of the main gate and the fine gate is formed by at least one of electroplating and electroless plating.
The solar cell according to the embodiment of the utility model comprises the grid line electrode of the solar cell described in any one of the above embodiments.
Drawings
Fig. 1 is a schematic structural view of a gate line electrode of a solar cell according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Reference numerals:
a main gate 100;
a fine gate 200; a first arc segment 210; a second arc segment 220; a first buffer section 230; a second buffer section 240;
a straight line segment 300;
the contacts 400 are plated.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
As shown in fig. 1 and 2, a gate line electrode of a solar cell according to an embodiment of the present invention includes a main gate 100 and a fine gate 200.
As shown in fig. 1, the main grid 100 is a plurality of main grids 100, and the plurality of main grids 100 are arranged at intervals along a first direction (e.g., a left-right direction in fig. 1) parallel to a width direction of the main grids 100.
Specifically, the plurality of main gates 100 are sequentially arranged at intervals in the left-right direction, and the distance between every two adjacent main gates 100 is equal. Alternatively, the main gate 100 may be a copper material; alternatively, the main grid 100 may be made of silver; alternatively, the main gate 100 may be made of other materials.
Alternatively, the number of the main gates may be 5, 9 or any other number.
The fine grid 200 is arranged in a wave shape along the first direction. Specifically, the fine mesh 200 includes a plurality of segments, which are sequentially connected in the left-right direction.
The main grid 100 is connected between two adjacent segments, the segments comprising at least one arc segment, the arc segments of the segments being connected to at least one main grid 100.
The fine gate 200 is plural, the fine gates 200 are arranged at intervals along a second direction (up-down direction in fig. 1) parallel to the length direction of the main gate 100, and each of the main gates 100 is connected to any one of the fine gates 200. Alternatively, the fine gate 200 may be copper material; alternatively, the fine grid 200 may be made of silver; alternatively, the fine gate 200 may be made of other materials.
That is, each main gate 100 intersects with the plurality of fine gates 200, respectively, and each fine gate 200 intersects with the plurality of main gates 100, respectively. That is, the plurality of main gates 100 and the plurality of fine gates 200 cross each other in a mesh structure. Specifically, the grid line electrode of the solar cell of the embodiment of the utility model is manufactured by an electroplating process.
According to the grid line electrode of the solar cell, the thin grid 200 is arranged in a wave shape, the thin grid 200 is provided with a plurality of arc line segments, when external force is applied to a certain position of the thin grid 200, the external force can be dispersed to other adjacent positions, namely, the thin grid 200 can disperse the external force applied to the position, so that the thin grid 200 can bear larger force, and therefore, when external stress is applied to the thin grid 200, the grid of the cell is not easy to break and be separated.
Therefore, the grid line electrode of the solar cell provided by the embodiment of the utility model has the advantages of stable structure and difficulty in damage.
In some embodiments, as shown in fig. 1, an angle between the width direction of the fine gate 200 and the second direction is greater than or equal to 0 ° and less than or equal to 45 °.
Here, the width direction of the fine grid 200 is a normal direction of any point in the arc segment of the fine grid 200. In other words, the width direction of the fine grid is the radial direction of the circle of curvature of the point, i.e. the direction in which the point points to the center of the circle of curvature of the point.
It can be understood that, when the included angle between the width direction of the fine grid 200 and the second direction is equal to 0 °, the extension direction of the tangent of the arc segment of the fine grid 200 is parallel to the left-right direction; when the included angle between the width direction of the fine grid 200 and the second direction is equal to 45 degrees, the extension direction of the tangent of the arc line segment of the fine grid 200 is inclined upwards or downwards by 45 degrees.
That is, since the slope of the arc line segment of the fine gate 200 changes slowly and the radian of the arc line segment of the fine gate 200 is small, the stress concentration inside the fine gate 200 can be reduced. In addition, the thin grid 200 does not have a curved part with a large curvature during processing, which is beneficial to reducing the processing difficulty of the thin grid 200.
Therefore, the grid line electrode of the solar cell provided by the embodiment of the utility model has the advantages of stable structure and simplicity in processing.
In addition, the fine grid 200 of the grid line electrode of the solar cell in the embodiment of the utility model is arranged in a wave shape along the first direction, and the included angle between the width direction of the fine grid 200 and the second direction is more than or equal to 0 degree and less than or equal to 45 degrees, which is an excellent scheme obtained through multiple tests.
In some embodiments, as shown in fig. 1 and 2, the segments further comprise at least one buffer segment, one end of the segmented buffer segment is connected to one main grid 100, and the other end of the segmented buffer segment is connected to the segmented arc segment.
It is understood that the length direction of a part of the buffer segment is parallel to the left-right direction, and the part of the buffer segment is connected with the adjacent main grid 100, and the other part of the buffer segment is connected with the segmented arc line segment in a smooth transition way.
Preferably, the normal size of any point on the buffer section is inversely proportional to the linear distance between the any point and the adjacent main grid 100 along the first direction, in other words, the width of the buffer section is gradually changed, wherein the width of the buffer section gradually decreases from one end of the connection between the buffer section and the adjacent main grid 100 to the connection between the buffer section and the adjacent arc line segment. Therefore, the width of the connection part of the buffer section and the main grid 100 is larger than the width of the rest part of the buffer section, so that the connection part of the buffer section and the main grid 100 is firmer, and the conditions of grid breakage and grid shedding are avoided.
Alternatively, the ratio of the size of the buffer section in the first direction to the size of a straight line between two main gates 100 adjacent to the buffer section in the first direction is in the range of 1/25 to 1/8.
Therefore, a turning angle with a smaller angle does not occur at the connection position of the fine grid 200 and the main grid 100, which is beneficial to processing the grid line electrode of the solar cell of the embodiment of the utility model and can reduce the stress concentration of the electrode.
As shown in fig. 1 and 2, the segment between two adjacent main gates 100 includes a first arc segment 210 and a second arc segment 220.
One end of the first arc segment 210 (e.g., the left end of the first arc segment 210 in fig. 1) of the segment is connected to one of the two adjacent main grids 100, the other end of the first arc segment 210 (e.g., the right end of the first arc segment 210 in fig. 1) of the segment is connected to one end of the second arc segment 220 (e.g., the left end of the second arc segment 220 in fig. 1) of the segment, and the other end of the second arc segment 220 (e.g., the right end of the second arc segment 220 in fig. 1) of the segment is connected to the other of the two adjacent main grids 100.
As shown in fig. 2, the arc center of the first arc segment 210 is located at the upper side, the arc center of the second arc segment 220 is located at the lower side, and the first arc segment 210 and the second arc segment 220 form an S-shaped structure, i.e. the right end of the first arc segment 210 and the left end of the second arc segment 220 are in smooth transition connection. Therefore, when the fine grid 200 receives an upward external force, the first arc segment 210 can disperse the external force, and when the fine grid 200 receives a downward external force, the second arc segment 220 can disperse the external force, so that grid breakage and grid shedding are avoided.
Optionally, the distance between the top position of the first arc segment 210 in the second direction and the bottom position of the second arc segment 220 in the second direction is in the range of 0.9-2.7mm in the second direction.
As shown in fig. 2, the segment between two adjacent main gates 100 further includes a first buffer section 230 and a second buffer section 240.
One end of the segmented first buffer segment 230 (e.g., the left end of the first buffer segment 230 in fig. 1) is connected to one of the two adjacent main gates 100, the other end of the segmented first buffer segment 230 (e.g., the right end of the first buffer segment 230 in fig. 1) is connected to one end of the segmented first arc segment 210, one end of the segmented second buffer segment 240 (e.g., the right end of the second buffer segment 240 in fig. 1) is connected to the other of the two adjacent main gates 100, and the other end of the segmented second buffer segment 240 (e.g., the left end of the second buffer segment 240 in fig. 1) is connected to the other end of the segmented second arc segment 220.
Specifically, as shown in fig. 2, one of the two adjacent main gates 100 is located at the left side, and the other of the two adjacent main gates 100 is located at the right side. The left end of the first buffer section 230 is connected to the left main grid 100, the right end of the first buffer section 230 is connected to the left end of the first arc section 210 in a smooth transition manner, the right end of the first arc section 210 is connected to the left end of the second arc section 220 in a smooth transition manner, the right end of the second arc section 220 is connected to the left end of the second buffer section 240 in a smooth transition manner, and the right end of the second buffer section 240 is connected to the right main grid 100.
Therefore, the slope of the arc line segment of the fine grid 200 changes slowly, the radian of the arc line segment of the fine grid 200 is small, and a turning angle with a small angle does not appear at the connection part of the fine grid 200 and the main grid 100, so that the processing of the grid line electrode of the solar cell in the embodiment of the utility model is facilitated, and the stress concentration of the electrode can be reduced.
In some embodiments, the grid line electrode of the solar cell of embodiments of the present invention further comprises a straight line segment 300. The number of the straight line segments 300 is plural, one end of the straight line segment 300 is connected to one of the two adjacent fine grids 200, and the other end of the straight line segment 300 is connected to the other of the two adjacent fine grids 200.
Specifically, the straight line segments 300 are connected between two adjacent fine grids 200, the plurality of straight line segments 300 are arranged at intervals in the vertical direction, and the plurality of straight line segments 300 are arranged at intervals in the direction of the fine grids 200. The straight line segment 300 can support the fine grid 200 and prevent the fine grid 200 from deforming or falling off, so that the straight line segment 300 can improve the structural stability of the two fine grids 200 connected with the straight line segment 300.
Alternatively, straight segment 300 may be a copper material; alternatively, the straight line segment 300 may be silver; alternatively, the straight line segment 300 may be made of other materials.
Therefore, the grid line electrode of the solar cell provided by the embodiment of the utility model has the advantage of stable structure.
As shown in fig. 1, two adjacent straight line segments 300 connected to one fine grid 200 are arranged at intervals in the first direction, one of the two adjacent straight line segments 300 connected to the one fine grid 200 is located on one side of the one fine grid 200 in the second direction, and the other of the two adjacent straight line segments 300 connected to the one fine grid 200 is located on the other side of the one fine grid 200 in the second direction.
That is, one of the two straight line segments 300 connected to and adjacent to one fine grid 200 is located above and to the left of the one fine grid 200, and the other of the two straight line segments 300 connected to and adjacent to one fine grid 200 is located below and to the right of the one fine grid 200; or one of the two adjacent straight line segments 300 connected with one fine grid 200 is positioned above the one fine grid 200 and positioned on the right side, and the other of the two adjacent straight line segments 300 connected with one fine grid 200 is positioned below the one fine grid 200 and positioned on the left side; or one of the two adjacent straight line segments 300 connected with one fine grid 200 is positioned below the one fine grid 200 and on the left side, and the other of the two adjacent straight line segments 300 connected with one fine grid 200 is positioned above the one fine grid 200 and on the right side; or one of the two adjacent straight line segments 300 connected to one fine grid 200 is located below the one fine grid 200 and on the right side, and the other of the two adjacent straight line segments 300 connected to one fine grid 200 is located above the one fine grid 200 and on the left side.
Alternatively, two straight line segments 300 connected to one fine grid 200 and adjacent to each other are arranged at intervals in the first direction, wherein the two straight line segments divide a segment in which the two straight line segments are located into three equally divided segments. Therefore, the stress borne by the equally divided sections can be respectively and uniformly distributed on the three sections, so that the bearing capacity of the fine grid on the external stress can be enhanced, and the conditions of grid breakage and grid shedding are avoided.
Optionally, the number of straight line segments between adjacent fine grids is N-1, the straight line segments are arranged at intervals in the first direction, and the segment where the straight line segments are located is divided into N equally-divided segments by the N-1 straight line segments.
Therefore, an external force applied to one fine grid 200 of the grid line electrode of the solar cell in the embodiment of the utility model can be dispersed to other fine grids 200 through the straight line segment 300, so that the fine grid 200 can bear a larger external force, and the structural stability of the grid line electrode of the solar cell in the embodiment of the utility model is improved.
The grid line electrode of the solar cell of the embodiment of the utility model further comprises an electroplating contact 400. Specifically, the plated contacts 400 can be connected to a main grid 100 and a fine grid 200; alternatively, the plated contacts 400 can be connected to two adjacent fine grids 200; alternatively, the plated contacts 400 can be connected to both a main grid 100 and two adjacent fine grids 200; alternatively, the plated contacts 400 can be connected to a main grid 100; alternatively, the plated contact 400 can be connected to a fine grid 200; alternatively, the plated contacts 400 are not connected to the main grid 100 and the fine grid 200. Wherein the number of the plating contacts 400 may be specifically set according to the plating process.
The solar cell according to the embodiment of the utility model comprises the grid line electrode of the solar cell according to any one of the embodiments. The solar cell can be a silicon heterojunction solar cell and can also be other types of solar cells.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A gate line electrode of a solar cell, comprising:
the main grids are arranged at intervals along a first direction, and the first direction is parallel to the width direction of the main grids; and
the fine grids are arranged in a wave shape along the first direction, the number of the fine grids is multiple, the fine grids are arranged at intervals along the second direction, the second direction is parallel to the length direction of the main grids, and each of the main grids is connected with any one of the fine grids.
2. The grid line electrode of claim 1, wherein an angle between the width direction of the fine grid and the second direction is greater than or equal to 0 ° and less than or equal to 45 °.
3. The grid line electrode of claim 1, wherein the fine grid comprises a plurality of segments, the main grid is connected between two adjacent segments, the segments comprise at least one arc segment, and the arc segments of the segments are connected with at least one main grid.
4. The grid line electrode of claim 3, wherein the segments further comprise at least one buffer segment, one end of the buffer segment of the segment is connected to one of the main grids, and the other end of the buffer segment of the segment is connected to the arc line segment of the segment.
5. The gate line electrode of a solar cell of claim 3, wherein the segment between two adjacent main gates comprises a first arc segment and a second arc segment, one end of the first arc segment of the segment is connected to one of the two adjacent main gates, the other end of the first arc segment of the segment is connected to one end of the second arc segment of the segment, and the other end of the second arc segment of the segment is connected to the other of the two adjacent main gates.
6. The gate line electrode of a solar cell of claim 5, wherein the segment between two adjacent main gates further comprises a first buffer segment and a second buffer segment, one end of the first buffer segment of the segment is connected to the one of the two adjacent main gates, the other end of the first buffer segment of the segment is connected to the one end of the first arc segment of the segment, one end of the second buffer segment of the segment is connected to the other of the two adjacent main gates, and the other end of the second buffer segment of the segment is connected to the other end of the second arc segment of the segment.
7. The grid line electrode of a solar cell as claimed in claim 1, further comprising a plurality of straight line segments, one end of each straight line segment being connected to one of two adjacent fine grids, and the other end of each straight line segment being connected to the other of two adjacent fine grids.
8. The grid line electrode of claim 7, wherein two adjacent straight line segments connected to one of the fine grids are arranged at an interval in the first direction, one of the two adjacent straight line segments connected to one of the fine grids is located on one side of the one of the fine grids in the second direction, and the other of the two adjacent straight line segments connected to one of the fine grids is located on the other side of the one of the fine grids in the second direction.
9. The grid line electrode of a solar cell of any one of claims 1 to 8, wherein the material of each of the main grid and the fine grid is copper or a copper alloy, and each of the main grid and the fine grid is formed by at least one of electroplating and electroless plating.
10. A solar cell comprising the grid line electrode of the solar cell according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121681508.4U CN215869408U (en) | 2021-07-22 | 2021-07-22 | Grid line electrode of solar cell and solar cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121681508.4U CN215869408U (en) | 2021-07-22 | 2021-07-22 | Grid line electrode of solar cell and solar cell |
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| CN215869408U true CN215869408U (en) | 2022-02-18 |
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| CN202121681508.4U Active CN215869408U (en) | 2021-07-22 | 2021-07-22 | Grid line electrode of solar cell and solar cell |
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Effective date of registration: 20220526 Address after: 102209 Beijing Changping Future Science and Technology City Patentee after: STATE POWER INVESTMENT CORPORATION Research Institute Patentee after: State Power Investment Group New Energy Technology Co., Ltd Address before: 102209 Beijing Changping Future Science and Technology City Patentee before: STATE POWER INVESTMENT CORPORATION Research Institute |
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