CN210123738U - Solar cell and laminated tile assembly - Google Patents
Solar cell and laminated tile assembly Download PDFInfo
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- CN210123738U CN210123738U CN201921398039.8U CN201921398039U CN210123738U CN 210123738 U CN210123738 U CN 210123738U CN 201921398039 U CN201921398039 U CN 201921398039U CN 210123738 U CN210123738 U CN 210123738U
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- main grid
- electrodes
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- hollow part
- hollow
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- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
The application provides a solar cell and a laminated tile assembly, wherein the solar cell comprises a plurality of cell units which are sequentially arranged along a first direction, two opposite side edges of each cell unit are respectively provided with a front main grid and a back main grid, and the front main grids are provided with front hollow parts; the back main grid is provided with a back hollow part, and the front hollow part and the back hollow part at least partially correspond to each other along a first direction. The tile stacking assembly comprises a first cell and a second cell, the first cell and the second cell are obtained by dividing a cell unit of the solar cell, a back main grid of the first cell is stacked on a front main grid of the second cell, and the conductive adhesive is not applied to an area corresponding to the positions of the front hollow part and the back hollow part. After part of light irradiated to the overlapped area penetrates through the second cell, the light can be absorbed by the first cell through the front hollow part and the back hollow part, the light utilization rate is improved, and higher conversion efficiency is favorably obtained.
Description
Technical Field
The application relates to the technical field of solar manufacturing, in particular to a solar cell and a laminated tile assembly.
Background
The traditional photovoltaic module realizes the electrical connection of adjacent battery pieces through the solder strip, and the light receiving area between the adjacent battery pieces cannot be fully utilized. In recent years, the market demand for high-power modules is growing, the laminated module does not need to be provided with welding strips, the cell capacity per unit area is increased by eliminating the space between adjacent cells, and the module efficiency is effectively improved, so that the laminated module is widely attracted by the industry.
Obviously, the smaller the overlap area of adjacent cells in a shingle assembly, the higher the optical utilization. But limited to the problems of device accuracy, reliability of the conductive paste, etc., it is difficult to further reduce the width of the overlapping area. In the overlapping region, after part of incident light penetrates through the upper layer battery piece, the incident light is absorbed by the electrode grid lines and the conductive adhesive, and the part of light penetrating through the upper layer battery piece cannot be reused.
Therefore, there is a need for a new solar cell and a new solar cell stack.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a solar cell and a laminated tile assembly, which can improve the light utilization rate and the conversion efficiency.
In order to achieve the above object, an embodiment of the present application provides a solar cell, including a plurality of battery units sequentially arranged along a first direction, where two opposite side edges of each battery unit are respectively provided with a front main grid and a back main grid, and the front main grid is formed with a front hollow portion; the back main grid is provided with a back hollow part, and the front hollow part and the back hollow part at least partially correspond to each other along a first direction.
As a further improvement of the embodiment of the present application, the front main grid includes a plurality of front electrodes disposed at intervals along a second direction perpendicular to the first direction; the back main grid comprises a plurality of back electrodes arranged at intervals along a second direction perpendicular to the first direction, and the front electrodes correspond to the back electrodes one to one along the first direction.
As a further improvement of the embodiment of the application, the front main grid further comprises two front thin grid lines which are connected and adjacent to the front electrode and are oppositely arranged, the front hollow-out portion is located between the two front thin grid lines, and the front hollow-out portion and the front electrode are alternately arranged along the second direction.
As a further improvement of the embodiment of the application, the back main gate further includes two back fine gate lines which are respectively disposed on two sides of the plurality of back electrodes and electrically connected to the back electrodes, the back hollow portion is located between the two back fine gate lines, and the back hollow portion and the back electrodes are alternately arranged along the second direction.
The application still provides a stack tile subassembly, including a plurality of battery strings, the battery string includes the conducting resin of first battery piece, second battery piece and the first battery piece of electric connection and second battery piece, the mutual overlap of edge between first battery piece, second battery piece is formed with the overlap region, the edge of first battery piece, second battery piece one side in opposite directions is equipped with corresponding front main grid, back main grid, its characterized in that respectively: the front main grid is provided with a front hollow part; and a back hollow part is formed on the back main grid, and the conductive adhesive is not applied to the area corresponding to the positions of the front hollow part and the back hollow part.
As a further improvement of the embodiment of the present application, the front main grid includes a plurality of front electrodes disposed at intervals along a second direction perpendicular to the first direction; the back main grid comprises a plurality of back electrodes arranged at intervals along a second direction perpendicular to the first direction, the front electrodes correspond to the back electrodes one to one, and the conductive adhesive is arranged between the front electrodes and the back electrodes.
As a further improvement of the embodiment of the application, the front main grid further comprises two front thin grid lines which are connected and adjacent to the front electrode and are oppositely arranged, the front hollow-out portion is located between the two front thin grid lines, and the front hollow-out portion and the front electrode are alternately arranged along the second direction.
As a further improvement of the embodiment of the application, the back main gate further includes two back fine gate lines which are respectively disposed on two sides of the plurality of back electrodes and electrically connected to the back electrodes, the back hollow portion is located between the two back fine gate lines, and the back hollow portion and the back electrodes are alternately arranged along the second direction.
As a further improvement of the embodiment of the present application, both the front main grid and the back main grid do not exceed the overlapping area.
The beneficial effect of this application is: adopt this application solar cell and shingle assembly, shine to the overlap area after partial light pierces through the second battery piece, can pass through openly portion, back fretwork portion are absorbed the utilization by first battery piece again, reduce openly main bars, back main bars and conducting resin are to the absorption of light, improve light utilization and conversion efficiency.
Drawings
Fig. 1 is a schematic front view of a solar cell according to the present application;
FIG. 2 is a schematic view of a backside structure of a solar cell according to the present application;
fig. 3 is a schematic view of a backside structure of another embodiment of a solar cell of the present application;
FIG. 4 is a schematic diagram of a cell string in a shingle assembly according to the present application;
fig. 5 is a schematic sectional view taken along the direction a-a in fig. 4.
Detailed Description
The present application will be described in detail below with reference to embodiments shown in the drawings. The present invention is not limited to the above embodiments, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the present embodiments are included in the scope of the present invention.
Referring to fig. 1 to 2, a solar cell 100 provided by the present application includes a plurality of battery cells 10 sequentially arranged along a first direction, and a front main grid 11 and a back main grid 12 extending along a second direction perpendicular to the first direction are respectively disposed at two opposite side edges of the battery cells 10. The solar cell 100 is divided into a plurality of strip-shaped cells corresponding to the cell units 10, and front main grids 11 and back main grids 12 are respectively arranged at the long edges of the two sides of each strip-shaped cell. The front side of the battery unit 10 is further provided with a front side sub grid 13, in this embodiment, the solar battery 100 is configured as a double-sided battery, and the back side of the battery unit 10 is further provided with a back side sub grid 14.
The front main grid 11 is formed with a front hollow part 111; the back main grid 12 is formed with a back hollow portion 121, and the front hollow portion 111 and the back hollow portion 121 at least partially correspond to each other along a first direction. In other words, in the process of connecting the strip-shaped battery pieces in series, that is, when the back main grid 12 of one strip-shaped battery piece is stacked on the front main grid 11 of the other strip-shaped battery piece, the front hollowed-out portion 111 and the back hollowed-out portion 121 are at least partially overlapped.
The front main grid 11 includes a plurality of front electrodes 112 disposed at intervals along the second direction, and two front thin grid lines 113 connected to the adjacent front electrodes 112 and disposed oppositely, the front hollow portion 111 is located between the two front thin grid lines 113, and the front hollow portions 111 and the front electrodes 112 are alternately arranged along the second direction. The back main gate 12 includes a plurality of back electrodes 122 disposed at intervals along the second direction, and two back fine gate lines 123 disposed on two sides of the plurality of back electrodes 122 and electrically connected to the back electrodes 122, the back hollow portion 121 is located between the two back fine gate lines 123, and the back hollow portions 121 and the back electrodes 122 are alternately arranged along the second direction. Here, the back electrodes 122 correspond to the front electrodes 112 one to one along the first direction.
Generally, the front electrode 112, the front fine gate line 113 and the front sub-gate 13 are all printed and sintered by the same silver paste; the back electrode 122 is also configured as a silver electrode, and the back fine grid line 123 and the back sub-grid 14 are configured as an aluminum grid line. Here, the front side sub-grid 13 is continuously disposed, a portion of the front side sub-grid 13 penetrates through the front side hollow-out portion 111 along the first direction and connects the two front side fine grid lines 113, and in order to increase the area of the front side hollow-out portion 111, the front side sub-grid 13 may not extend into between the two front side fine grid lines 113. Similarly, the back side sub-gate may not extend into between two back side fine gate lines 123.
The solar cell 100 may also be configured as a single-sided cell, and as shown in fig. 3, the back surface of the cell unit 10 is provided with a back electric field 15. The back main grid 12 includes back hollow portions 121 and back electrodes 122 alternately arranged along a second direction, and the back electrodes 122 are at least partially electrically connected to the back electric field 15.
Referring to fig. 4 and 5, the stack assembly provided by the present application includes a plurality of battery strings 201, where the battery strings 201 include a first battery plate 101, a second battery plate 102, and a conductive adhesive 103 electrically connecting the first battery plate 101 and the second battery plate 102.
The first cell piece 101 and the second cell piece 102 are strip-shaped cell pieces obtained by dividing the solar cell 100, and the edges of the first cell piece 101 and the second cell piece 102 are overlapped to form an overlapping area. Specifically, the back main grid 12 of the second cell 102 is stacked on the front main grid 11 of the first cell 101, the conductive adhesive 103 is disposed between the front main grid 11 and the back main grid 12, and neither the front main grid 11 nor the back main grid 12 exceeds the overlapping area. It should be noted that the structure of the front main grid 11, the back main grid 12 and the conductive paste 103 shown in fig. 5 is only for more clearly describing the inventive concept of the present application, and is not the actual thickness of the front main grid 11, the back main grid 12 and the conductive paste 103 along the stacking direction.
The front hollow-out portion 111 corresponds to at least part of the back hollow-out portion 121, and the conductive adhesive 103 is not applied to the area corresponding to the front hollow-out portion 111 and the back hollow-out portion 121, so that part of the light penetrating through the second cell 102 can pass through the front hollow-out portion 111 and the back hollow-out portion 121 and then be absorbed and utilized by the first cell 101, absorption of the front main grid 11, the back main grid 12 and the conductive adhesive 103 to the light is reduced, and utilization rate of the light is effectively improved. Preferably, the front electrodes 112 correspond to the back electrodes 122 one by one, and the conductive adhesive 103 is disposed between the front electrodes 112 and the back electrodes 122.
In summary, with the solar cell 100 and the laminated tile assembly of the present application, after a part of light irradiated to the overlapping region penetrates through the second cell 102, the part of light can be absorbed and utilized by the first cell 101 through the front hollow-out portion 111 and the back hollow-out portion 121, so that the absorption of the front main grid 11, the back main grid 12 and the conductive adhesive 103 to the light is reduced, and the light utilization rate and the conversion efficiency are improved.
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 concrete description of the feasible embodiments of the present application, they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present application are intended to be included within the scope of the present application.
Claims (9)
1. The utility model provides a solar cell, includes a plurality of battery units that arrange in proper order along first direction, the relative both sides edge department of battery unit is equipped with positive main grid and back main grid, its characterized in that: the front main grid is provided with a front hollow part; the back main grid is provided with a back hollow part, and the front hollow part and the back hollow part at least partially correspond to each other along a first direction.
2. The solar cell according to claim 1, characterized in that: the front main grid comprises a plurality of front electrodes arranged at intervals along a second direction perpendicular to the first direction; the back main grid comprises a plurality of back electrodes arranged at intervals along a second direction perpendicular to the first direction, and the front electrodes correspond to the back electrodes one to one along the first direction.
3. The solar cell according to claim 2, characterized in that: the front main grid further comprises two front thin grid lines which are connected with the adjacent front electrodes and are oppositely arranged, the front hollow-out portion is located between the two front thin grid lines, and the front hollow-out portions and the front electrodes are alternately arranged along the second direction.
4. The solar cell according to claim 2, characterized in that: the back main grid further comprises two back fine grid lines which are respectively arranged on two sides of the back electrodes and electrically connected with the back electrodes, the back hollow parts are located between the two back fine grid lines, and the back hollow parts and the back electrodes are alternately arranged along the second direction.
5. The utility model provides a shingle assembly, includes a plurality of battery clusters, the battery cluster includes the conducting resin of first battery piece, second battery piece and the first battery piece of electric connection and second battery piece, the mutual overlap of edge between first battery piece, second battery piece is formed with the overlap region, the edge of first battery piece, second battery piece one side in opposite directions is equipped with corresponding front main grid, back main grid, its characterized in that respectively: the front main grid is provided with a front hollow part; and a back hollow part is formed on the back main grid, and the conductive adhesive is not applied to the area corresponding to the positions of the front hollow part and the back hollow part.
6. The shingle assembly of claim 5, wherein: the front main grid comprises a plurality of front electrodes arranged at intervals along a second direction perpendicular to the first direction; the back main grid comprises a plurality of back electrodes arranged at intervals along a second direction perpendicular to the first direction, the front electrodes correspond to the back electrodes one to one, and the conductive adhesive is arranged between the front electrodes and the back electrodes.
7. The shingle assembly of claim 6, wherein: the front main grid further comprises two front thin grid lines which are connected with the adjacent front electrodes and are oppositely arranged, the front hollow-out portion is located between the two front thin grid lines, and the front hollow-out portions and the front electrodes are alternately arranged along the second direction.
8. The shingle assembly of claim 6, wherein: the back main grid further comprises two back fine grid lines which are respectively arranged on two sides of the back electrodes and electrically connected with the back electrodes, the back hollow parts are located between the two back fine grid lines, and the back hollow parts and the back electrodes are alternately arranged along the second direction.
9. The shingle assembly of claim 5, wherein: and the front main grid and the back main grid do not exceed the overlapping area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398039.8U CN210123738U (en) | 2019-08-27 | 2019-08-27 | Solar cell and laminated tile assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398039.8U CN210123738U (en) | 2019-08-27 | 2019-08-27 | Solar cell and laminated tile assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210123738U true CN210123738U (en) | 2020-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921398039.8U Active CN210123738U (en) | 2019-08-27 | 2019-08-27 | Solar cell and laminated tile assembly |
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| Country | Link |
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| CN (1) | CN210123738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122164A (en) * | 2021-11-24 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Laminated cell structure and preparation method |
-
2019
- 2019-08-27 CN CN201921398039.8U patent/CN210123738U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122164A (en) * | 2021-11-24 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Laminated cell structure and preparation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |