CN209822662U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
- Publication number
- CN209822662U CN209822662U CN201920989364.5U CN201920989364U CN209822662U CN 209822662 U CN209822662 U CN 209822662U CN 201920989364 U CN201920989364 U CN 201920989364U CN 209822662 U CN209822662 U CN 209822662U
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- conductive segment
- conductive
- photovoltaic
- electrode
- edge
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- 239000004020 conductor Substances 0.000 claims description 4
- 210000004027 cell Anatomy 0.000 description 87
- 229910000679 solder Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model provides a photovoltaic module, which comprises a plurality of battery strings, wherein each battery string comprises a plurality of photovoltaic batteries arranged along a first direction and a conductive piece electrically connected with the adjacent photovoltaic batteries, the edges of the adjacent photovoltaic batteries are overlapped, and the surfaces of the photovoltaic batteries are provided with a confluence electrode extending along the first direction and an edge electrode positioned at the edge of the photovoltaic battery; the conductive piece comprises a first conductive segment connected with a bus electrode on the front side of the photovoltaic cell, a second conductive segment connected with a bus electrode on the back side of another adjacent photovoltaic cell, and a third conductive segment connected with the edge electrode, wherein at least part of the third conductive segment is clamped in an overlapping area between the two adjacent photovoltaic cells. The utility model discloses adjacent photovoltaic cell's electric connection is more reliable among the photovoltaic module, reduces photovoltaic cell border position's stress simultaneously, reduces latent risk of splitting, improves product quality.
Description
Technical Field
The utility model relates to a solar energy power generation technical field, in particular to photovoltaic module.
Background
The cell string of the traditional photovoltaic module realizes the electrical connection of the adjacent photovoltaic cells through the solder strip, and the solder strip is connected with the front electrode of one photovoltaic cell and the back electrode of the other adjacent photovoltaic cell. In order to improve the utilization rate of the photovoltaic module on the light receiving area, all major manufacturers pay greater attention to the tile-stacked module in recent years, the tile-stacked module is overlapped with each other at the edge position through adjacent photovoltaic cells, the inter-sheet distance is cancelled, the light receiving area is utilized to the maximum extent, and the connection of the adjacent photovoltaic cells is not required to be carried out by adopting a welding strip; but still face the problems of high cost, poor reliability, difficult reworking and the like of the conductive adhesive. In view of the above problems, a "stitch-bonding" assembly has been proposed in recent years, as shown in fig. 1 and 2, adjacent photovoltaic cells 101 are electrically connected by using solder strips 102, and the edge positions of the adjacent photovoltaic cells 101 are overlapped with each other. Although the stitch welding assembly eliminates the inter-sheet distance and fully utilizes the light receiving area, the edge position stress of the adjacent photovoltaic cells 101 is large, the edge is prone to be hidden and cracked, and gaps exist between the adjacent photovoltaic cells 101, and defects such as bubbles and wrinkles are likely to be generated in the laminating process.
In view of the above, there is a need for an improved photovoltaic module.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a photovoltaic module can ensure the electric connection between the adjacent photovoltaic cell, reduces photovoltaic cell edge stress, improves latent splitting, improves product quality.
In order to achieve the above object, the present invention provides a photovoltaic module, which comprises a plurality of cell strings, wherein each cell string comprises a plurality of photovoltaic cells arranged along a first direction and conductive members electrically connected to adjacent photovoltaic cells, edges of the adjacent photovoltaic cells are overlapped, and a bus electrode extending along the first direction and an edge electrode located at the edge of the photovoltaic cell are arranged on the surface of each photovoltaic cell; the conductive piece comprises a first conductive segment connected with a bus electrode on the front side of the photovoltaic cell, a second conductive segment connected with a bus electrode on the back side of another adjacent photovoltaic cell, and a third conductive segment connected with the edge electrode, wherein at least part of the third conductive segment is clamped in an overlapping area between the two adjacent photovoltaic cells.
As a further improvement of the present invention, the third conductive segment is connected to the first conductive segment and the second conductive segment simultaneously.
As a further improvement of the present invention, the third conductive segment is integrally formed with at least one of the first conductive segment and the second conductive segment.
As a further improvement of the utility model, the third conducting segment is flat strip, just the third conducting segment has to press from both sides and locates adjacently first portion between the photovoltaic cell, be located the second part outside two adjacent photovoltaic cell overlap areas, the second part with first conducting segment, second conducting segment are connected.
As a further improvement of the present invention, the thickness of the second portion does not exceed the thickness of the first portion.
As a further improvement of the invention, the first conductive segment and/or the second conductive segment is connected to the second portion towards one end of the third conductive segment.
As a further improvement of the present invention, the third conductive segment is entirely sandwiched between the photovoltaic cells.
As a further improvement of the present invention, the third conductive segment is a flexible conductive material continuously disposed.
As a further improvement of the present invention, the third conductive segment is a flat solder strip.
As a further improvement of the present invention, the third conductive segment extends along a second direction perpendicular to the first direction, and the width of the third conductive segment along the first direction is set to be 0.3-5 mm; the thickness of the third conductive segment is set to be 0.1-0.6 mm.
As a further improvement of the present invention, the edge electrode is connected to the bus electrode, the edge electrode is continuously extended along the second direction, and the second direction is perpendicular to the first direction.
As a further improvement of the present invention, the edge electrode includes a plurality of dot-shaped electrodes arranged at intervals along the second direction, the dot-shaped electrodes are connected to the bus electrode near the overlapping edge, the size of the dot-shaped electrodes in the second direction is larger than the size of the bus electrode in the second direction, the size of the dot-shaped electrodes in the first direction is smaller than the overlapping width of the two adjacent photovoltaic cells, and the second direction is perpendicular to the first direction.
As a further improvement of the present invention, the width of the edge electrode along the first direction is set to be 0.2-3 mm.
As a further improvement of the utility model, the edge electrode is wavy or zigzag or square wave.
The utility model has the advantages that: adopt the utility model discloses photovoltaic module is through setting up the edge electrode on the photovoltaic cell surface to realize adjacent photovoltaic cell's electric connection through the third conducting segment of connection on the edge electrode, adopt first conducting segment, second conducting segment simultaneously in order to collect photovoltaic cell's surface current more effectively, can reduce the stress of photovoltaic cell border position better, reduce latent risk of splitting, can also reduce bubble, fold etc. that probably appear unusually.
Drawings
FIG. 1 is a schematic view of a connection structure of adjacent photovoltaic cells in a conventional photovoltaic module;
FIG. 2 is a schematic view of another angle connection of adjacent photovoltaic cells of FIG. 1;
fig. 3 is a schematic plan view of the cell string in the photovoltaic module according to the present invention;
fig. 4 is a schematic front view of a photovoltaic cell of the photovoltaic module of the present invention;
FIG. 5 is a schematic rear view of the photovoltaic cell of FIG. 4;
fig. 6 is a schematic front view of a corresponding one-piece cell piece of the photovoltaic cell of fig. 4;
fig. 7 is a schematic plane connection diagram of adjacent photovoltaic cells in the photovoltaic module of the present invention;
FIG. 8 is a schematic diagram of the connection of adjacent photovoltaic cells of FIG. 7;
fig. 9 is a schematic front view of another embodiment of a photovoltaic cell of a photovoltaic module according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiment, and the structural, method, or functional changes made by those skilled in the art according to the embodiment are all included in the scope of the present invention.
Referring to fig. 3 to 8, the photovoltaic module provided by the present invention comprises a plurality of cell strings 100, wherein the cell strings 100 comprise a plurality of photovoltaic cells 11 arranged in sequence along a first direction, and are electrically connected to each other, and the photovoltaic cells 11 are electrically connected to each other, and are adjacent to each other, and the photovoltaic cells 11 are overlapped to each other at the edge to form an overlapping region 110. The arrangement of the cell strings 100 and the number of the photovoltaic cells 11 in each cell string 100 can be designed according to actual requirements.
The surface of the photovoltaic cell 11 is provided with a bus electrode extending along a first direction, and the bus electrode includes a front electrode 111 and a back electrode 112 respectively disposed on the front surface and the back surface of the photovoltaic cell 11. Furthermore, the photovoltaic cell 11 has two side edges 113 oppositely arranged along a first direction, and the side edges 113 extend along a second direction perpendicular to the first direction. Obviously, the photovoltaic cell 11 is also provided on the front side with a fine grid (not shown) for collecting surface currents, and when the photovoltaic cell 11 is a bifacial cell, on the back side with a corresponding fine grid.
At least one side surface of the photovoltaic cell 11 is further provided with an edge electrode adjacent to one of the side edges 113 and located in the overlapping region 110, and the edge electrode and the conductive member cooperate to realize the electrical connection between the adjacent photovoltaic cells 11. The width of the edge electrode is larger than that of the fine grid, and preferably, the width of the edge electrode along the first direction is set to be 0.2-3 mm.
Here, the front and back sides of the photovoltaic cell 11 are respectively provided with a front edge electrode 114 and a back edge electrode 115, and the front edge electrode 114 and the back edge electrode 115 are respectively disposed adjacent to two side edges 113 of the photovoltaic cell 11. Wherein the front electrode 111 is connected to the front edge electrode 114; the back electrode 112 is connected to the back edge electrode 115. Both the front side edge electrode 114 and the back side edge electrode 115 extend continuously in a second direction perpendicular to the first direction, the back side edge electrode 115 of the photovoltaic cell 11 corresponding in position to the front side edge electrode 114 of another adjacent photovoltaic cell 11. Here, the ends of the front and rear electrodes 111 and 112 facing the overlapping area 110 are connected to the front and rear edge electrodes 114 and 115, respectively.
The photovoltaic cell 11 may be a monolithic photovoltaic cell or a sub-cell cut from a monolithic photovoltaic cell. In the present embodiment, the photovoltaic cell 11 is a half-sheet photovoltaic cell (obtained by cutting a mother sheet along a dotted line as shown in fig. 6), that is, the photovoltaic cell 11 has a short side extending along the first direction, and a long side extending along a second direction perpendicular to the first direction, where the long side is the aforementioned side 113, and the length of the long side is preferably set to be 120-170 mm. Here, the photovoltaic cell 11 is a multi-master grid cell, and the number of the front and back electrodes 111 and 112 is not less than 5.
The conductive piece comprises a first conductive segment 12 connected with the front electrode 111, a second conductive segment 13 connected with the back electrode 112 of another adjacent photovoltaic cell 11, and a third conductive segment 14 connected with the edge electrode, wherein at least part of the third conductive segment 14 is clamped between two adjacent photovoltaic cells 11. The length of the first conductive segment 12 along the first direction is matched with the front electrode 111; the length of the second conductive segment 13 in the first direction is adapted to the back electrode 112. It should be noted that the lengths of the first conductive segment 12 and the second conductive segment 13 may also be set smaller than the lengths of the corresponding front electrode 111 and the back electrode 112.
The first conductive segment 12 and the second conductive segment 13 are used for collecting surface current of the corresponding photovoltaic cell 11, and the first conductive segment 12 and the second conductive segment 13 are solder strips extending along a first direction. The third conductive segment 14 may be made of conductive adhesive, solder paste or other conductive materials with good flexibility, and the third conductive segment 14 is disposed in a continuous flat strip shape. In particular, the first conductive segment 12, the second conductive segment 13 and the third conductive segment may also be made of the same or similar metal conductive materials and integrally formed.
The third conductive segment 14 has a first portion 141 sandwiched between two adjacent photovoltaic cells 11, and a second portion 142 extending beyond the overlapping region 110, and the thickness of the second portion 142 is preferably not more than the thickness of the first portion 141. Here, the third conductive segment 14 connects the first conductive segment 12 on the surface of one photovoltaic cell 11 and the second conductive segment 13 on the surface of another adjacent photovoltaic cell 11, and the ends of the first and second conductive segments 12 and 13 facing the third conductive segment 14 are connected to the second portion 142. In other words, the second portions 142 of the third conductive segments 14 can be considered as two and are respectively located at two sides of the first portion 141 along the first direction. One of the second portions 142 is connected to the first conductive segment 12 and the other of the second portions 142 is connected to the second conductive segment 13.
By adopting the above design, the electrical connection between the adjacent photovoltaic cells 11 is realized by the third conductive segment 14, and the first conductive segment 12 and the second conductive segment 13 do not extend into the overlapping region 110 of the adjacent photovoltaic cells 11, so as to avoid increasing the edge stress of the corresponding photovoltaic cells 11, which may cause the subfissure phenomenon.
The extension length of the third conductive segment 14 along the second direction is not less than the distance between the two farthest front electrodes 111 on the surfaces of the photovoltaic cells 11, so that the first conductive segments 12 connected to the front surfaces of the corresponding photovoltaic cells 11 can be connected to the third conductive segment 14. Generally, the front electrodes 111 and the back electrodes 112 on the two side surfaces of the photovoltaic cell 11 are disposed in a one-to-one correspondence, that is, the first conductive segments 12 are disposed in a one-to-one correspondence with the second conductive segments 13, that is, the length of the third conductive segment 14 is not less than the distance between the two first conductive segments 12 that are farthest away from each other or the distance between the two second conductive segments 13 that are farthest away from each other along the second direction. Preferably, the length of the third conductive segment 14 is set to match the length of the edge electrode. In other embodiments of the present invention, the front electrode 111 and the back electrode 112 may also be disposed in a staggered manner, and the adjacent photovoltaic cells 11 can also be electrically connected through the third conductive segment 14.
Preferably, the width of the third conductive segment 14 along the first direction is set to be 0.3-5 mm; the thickness of the third conductive segment is set to be 0.1-0.6 mm. Of course, the specific specification of the third conductive segment 14 can be designed according to the material properties and the product requirements.
Referring to fig. 9, the edge electrodes may also be designed in a segmented manner, taking the front edge electrode 114 as an example, the front edge electrode 114 includes a plurality of dot electrodes 1141 arranged at intervals along the second direction, the dot electrodes 1141 are connected to one end of the front electrode 111 facing the overlapping region 110, in other words, the end of each front electrode 111 is connected to the corresponding dot electrode 1141. The size of the dot-shaped electrode 1141 in the second direction is larger than that of the front electrode 111 in the second direction, and the size of the dot-shaped electrode 1141 in the first direction is smaller than the width of the overlapping region 110.
In addition, in other embodiments of the present invention, the edge electrode may be disposed in a wave shape, a saw-tooth shape or a square wave shape to increase the contact area between the edge electrode and the third conductive segment, so as to increase the reliability of the electrical connection and reduce the edge stress of the photovoltaic cell 11.
To sum up, the adjacent photovoltaic cells 11 of the photovoltaic module of the present invention are electrically connected to each other through the third conductive segment 14 connected to the edge electrode, and the first conductive segment 12 and the second conductive segment 13 can more effectively collect the surface current of the photovoltaic cells 11; and the first conductive segment 12 and the second conductive segment 13 are only connected to the second portion 142 of the third conductive segment 14 in an extending manner, so that overlapping of adjacent photovoltaic cells 11 is not affected, stress at the edge of the photovoltaic cells 11 can be reduced well, the risk of subfissure is reduced, gaps existing between the adjacent photovoltaic cells 11 are eliminated, and bubble and wrinkle abnormalities possibly occurring in subsequent lamination and other processes are avoided.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A photovoltaic module, includes a plurality of battery cluster, its characterized in that: the cell string comprises a plurality of photovoltaic cells arranged along a first direction and conductive pieces electrically connected with the adjacent photovoltaic cells, the edges of the adjacent photovoltaic cells are overlapped, and the surfaces of the photovoltaic cells are provided with bus electrodes extending along the first direction and edge electrodes positioned at the edges of the photovoltaic cells; the conductive piece comprises a first conductive segment connected with a bus electrode on the front side of the photovoltaic cell, a second conductive segment connected with a bus electrode on the back side of another adjacent photovoltaic cell, and a third conductive segment connected with the edge electrode, wherein at least part of the third conductive segment is clamped in an overlapping area between the two adjacent photovoltaic cells.
2. The photovoltaic module of claim 1, wherein: the third conductive segment connects the first conductive segment and the second conductive segment simultaneously.
3. The photovoltaic module of claim 1, wherein: the third conductive segments are made of flexible conductive material and are arranged continuously.
4. The photovoltaic module of claim 1, wherein: the third conductive segment is in a flat strip shape, and the third conductive segment is provided with a first part clamped between the adjacent photovoltaic cells and a second part positioned outside the overlapping area of the two adjacent photovoltaic cells, and the second part is connected with the first conductive segment and the second conductive segment.
5. The photovoltaic module of claim 4, wherein: the thickness of the second portion does not exceed the thickness of the first portion.
6. The photovoltaic module of claim 4, wherein: the first and/or second conductive segments are connected to the second portion toward an end of the third conductive segment.
7. The photovoltaic module of claim 1, wherein: and the third conductive segments are all clamped between the adjacent photovoltaic cells.
8. The photovoltaic module of claim 1, wherein: the third conductive segment extends along a second direction perpendicular to the first direction, and the width of the third conductive segment along the first direction is set to be 0.3-5 mm; the thickness of the third conductive segment is set to be 0.1-0.6 mm.
9. The photovoltaic module of claim 1, wherein: the edge electrode comprises a plurality of dot-shaped electrodes which are arranged at intervals along a second direction, the dot-shaped electrodes are connected to one end, close to the overlapping edge, of the bus electrode, the size of each dot-shaped electrode in the second direction is larger than that of the corresponding bus electrode in the second direction, the size of each dot-shaped electrode in the first direction is smaller than the overlapping width of two adjacent photovoltaic cells, and the second direction is perpendicular to the first direction.
10. The photovoltaic module of claim 1, wherein: the edge electrode extends along a second direction and is connected with the bus electrode, and the second direction is vertical to the first direction; the width of the edge electrode along the first direction is set to be 0.2-3 mm, and the edge electrode is arranged in a linear shape, a wavy shape, a sawtooth shape or a square wave shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920989364.5U CN209822662U (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920989364.5U CN209822662U (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209822662U true CN209822662U (en) | 2019-12-20 |
Family
ID=68884861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920989364.5U Active CN209822662U (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209822662U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114078984A (en) * | 2020-08-11 | 2022-02-22 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
-
2019
- 2019-06-27 CN CN201920989364.5U patent/CN209822662U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114078984A (en) * | 2020-08-11 | 2022-02-22 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: CSI Cells Co.,Ltd. Patentee after: Changshu Artes Sunshine Power Technology Co.,Ltd. Patentee after: Atlas sunshine Power Group Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI Cells Co.,Ltd. Patentee before: Changshu Artes Sunshine Power Technology Co.,Ltd. Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |