CN210837774U - Double-sided solar cell metallization structure with high double-sided rate - Google Patents
Double-sided solar cell metallization structure with high double-sided rate Download PDFInfo
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- CN210837774U CN210837774U CN201922452860.XU CN201922452860U CN210837774U CN 210837774 U CN210837774 U CN 210837774U CN 201922452860 U CN201922452860 U CN 201922452860U CN 210837774 U CN210837774 U CN 210837774U
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- 238000001465 metallisation Methods 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 129
- 239000002184 metal Substances 0.000 claims abstract description 129
- 210000004027 cell Anatomy 0.000 claims description 28
- 210000005056 cell body Anatomy 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- -1 silver-aluminum Chemical compound 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 2
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 2
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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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Abstract
The utility model provides a two-sided solar cell metallization structure of high two-sided rate belongs to solar cell technical field. The battery comprises a battery body, wherein a plurality of mutually parallel front metal auxiliary grid lines are uniformly arranged on the front side of the battery body at intervals, a plurality of mutually parallel back metal auxiliary grid lines are uniformly arranged on the back side of the battery body at intervals, the number of the back metal auxiliary grid lines is one more than that of the front metal auxiliary grid lines, the projection of each front metal auxiliary grid line in the vertical direction is just positioned between two adjacent back metal auxiliary grid lines, and the front metal auxiliary grid lines and the back metal auxiliary grid lines are mutually parallel. The utility model discloses the setting of grid line guarantees that positive battery efficiency can not reduce when guaranteeing back conversion efficiency to a double-sided solar cell of high two-sided rate is provided.
Description
Technical Field
The utility model belongs to the technical field of solar cell, a two-sided solar cell metallization structure of high two-sided rate is related to.
Background
The double-sided solar cell can effectively manufacture and simplify the process, greatly shorten the whole process time, further save the cost and ensure that the manufacturing process of the double-sided solar cell is simpler, more convenient, quicker and more efficient. The solar absorption method of the double-sided single crystal silicon photovoltaic cell is to generate electricity by using emitted light from the back surface and diffuse reflected light from the surrounding environment. Therefore, compared with the traditional single-sided P-type cell, the double-sided single-crystal silicon photovoltaic cell can obtain much higher cell output power, has a higher power/weight ratio, and is less limited in the direction of generating capacity when the double-sided single-crystal silicon photovoltaic cell is vertically installed.
Although the double-sided battery can effectively utilize the emitted light and diffuse reflection at the back side, the conversion efficiency at the front side is necessarily reduced due to the light transmission at the back side. To improve the conversion efficiency of the back side of the double-sided battery, the non-shading area of the back side needs to be increased, and the non-shading area of the back side can cause the long wave incident from the front side to be projected, thereby reducing the conversion efficiency of the front side.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide a two-sided solar cell metallization structure of high two-sided rate.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the utility model provides a two-sided solar cell metallization structure of high two-sided rate, includes the battery body, the front interval of battery body even be equipped with a plurality of front metal secondary grid lines that are parallel to each other, the back interval of battery body even be equipped with a plurality of back metal secondary grid lines that are parallel to each other, the quantity of back metal secondary grid line is one more than the quantity of front metal secondary grid line, and every front metal secondary grid line projection in vertical direction is located between two adjacent back metal secondary grid lines just, front metal secondary grid line and back metal secondary grid line are parallel to each other.
Furthermore, the projection of each front metal secondary grid line in the vertical direction is just positioned in the middle of two adjacent back metal secondary grid lines.
Furthermore, a plurality of front metal main grid lines which are parallel to each other are arranged on the front side of the battery body and above the front metal auxiliary grid lines, a plurality of back metal main grid lines which are parallel to each other are arranged on the back side of the battery body and above the back metal auxiliary grid lines, and the number of the front metal main grid lines is the same as that of the back metal main grid lines.
Furthermore, the front metal main grid lines correspond to the back metal main grid lines one by one, so that the projections of the front metal main grid lines in the vertical direction are just positioned in the back metal main grid lines.
Furthermore, two ends of the front metal main grid line extend out of the two front metal auxiliary grid lines positioned at the outermost edge, and two ends of the back metal main grid line extend out of the two back metal auxiliary grid lines positioned at the outermost edge.
Furthermore, the front metal secondary grid line and the front metal secondary grid line are orthogonally arranged, and the back metal secondary grid line are orthogonally arranged.
Furthermore, the width of the front metal main grid line is 0.1-1mm, and the width of the back metal main grid line is 0.1-3 mm.
Furthermore, the width of the front metal secondary grid line is 20-60 μm, and the width of the back metal secondary grid line is 20-300 μm.
Furthermore, the front metal secondary grid line and the back metal secondary grid line are made of silver or silver-aluminum alloy.
Furthermore, the front metal main grid line and the back metal main grid line are made of silver or silver-aluminum alloy.
Compared with the prior art, the utility model has the advantages of:
due to the arrangement of the grid lines, the efficiency of the front-side cell is guaranteed not to be reduced while the back-side conversion efficiency is guaranteed, and therefore the double-side solar cell with high double-side rate is provided.
Simple and reliable structure, and can be used for N-type heterojunction double-sided battery, N-type PERT double-sided battery, N-type TOPCON double-sided battery and P-type PERC double-sided battery
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a schematic plan view of the present invention.
In the figure: the solar cell comprises a cell body 1, a front metal auxiliary grid line 2, a back metal auxiliary grid line 3, a front metal main grid line 4 and a back metal main grid line 5.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 and 2, a high-double-sided-rate double-sided solar cell metallization structure comprises a cell body 1, wherein a plurality of mutually parallel front metal secondary grid lines 2 are uniformly arranged on the front side of the cell body 1 at intervals, a plurality of mutually parallel back metal secondary grid lines 3 are uniformly arranged on the back side of the cell body 1 at intervals, the number of the back metal secondary grid lines 3 is one more than that of the front metal secondary grid lines 2, the projection of each front metal secondary grid line 2 in the vertical direction is just positioned between two adjacent back metal secondary grid lines 3, and the front metal secondary grid lines 2 and the back metal secondary grid lines 3 are mutually parallel.
The front metal auxiliary grid line 2 and the back metal auxiliary grid line 3 are made of silver or silver-aluminum alloy. The width of the front metal secondary grid line 2 is 20-60 μm, and the width of the back metal secondary grid line 3 is 20-300 μm.
Preferably, the projection of each front metal secondary grid line 2 in the vertical direction is located right in the middle of two adjacent back metal secondary grid lines 3.
More preferably, a plurality of front metal main grid lines 4 which are parallel to each other are arranged on the front side of the battery body 1 and above the front metal auxiliary grid lines 2, a plurality of back metal main grid lines 5 which are parallel to each other are arranged on the back side of the battery body 1 and above the back metal auxiliary grid lines 3, and the number of the front metal main grid lines 4 is the same as that of the back metal main grid lines 5.
In this embodiment, the front metal main gate line 4 is fixedly connected to the front metal sub-gate line 2, and the back metal main gate line 5 is fixedly connected to the back metal sub-gate line 3, so as to form a mesh-shaped cross-linked structure, thereby increasing strength and reflectivity.
It should be noted that the front metal main gate lines 4 correspond to the back metal main gate lines 5 one by one, so that the projections of the front metal main gate lines 4 in the vertical direction are exactly located in the back metal main gate lines 5, that is, the width of the back metal main gate lines 5 is not less than the width of the front metal main gate lines 4. Specifically, the width of the front metal main grid line 4 is 0.1-1mm, and the width of the back metal main grid line 5 is 0.1-3 mm. The front metal main grid line 4 and the back metal main grid line 5 are made of silver or silver-aluminum alloy.
Two ends of the front metal main grid line 4 extend out of the two front metal auxiliary grid lines 2 positioned at the most edge, two ends of the back metal main grid line 5 extend out of the two back metal auxiliary grid lines 3 positioned at the most edge, namely, each front metal auxiliary grid line 2 is fixedly connected with the front metal main grid line 4, and each back metal auxiliary grid line 3 is fixedly connected with the back metal main grid line 5, so that a net-shaped structure is formed.
More specifically, the front metal secondary grid line 2 and the front metal secondary grid line 2 are orthogonally arranged, the back metal secondary grid line 3 and the back metal secondary grid line 3 are orthogonally arranged, and a rectangular grid structure is formed.
Through the design of the metallization graph of the front grid line and the back grid line of the cell body, the conversion efficiency of the back is ensured, and meanwhile, the efficiency of the front cell is ensured not to be reduced, so that the double-sided solar cell with high double-sided rate is provided. The design is simple and feasible, and can be applied to N-type heterojunction double-sided batteries, N-type PERT double-sided batteries, N-type TOPCON double-sided batteries, P-type PERC double-sided batteries and the like.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein will be apparent to those skilled in the art without departing from the spirit of the invention.
Claims (10)
1. The utility model provides a two-sided solar cell metallization structure of high two-sided rate, includes battery body (1), its characterized in that, battery body (1) the front interval even be equipped with a plurality of front metal secondary grid line (2) that are parallel to each other, battery body (1) the back interval even be equipped with a plurality of back metal secondary grid line (3) that are parallel to each other, the quantity of back metal secondary grid line (3) is more one than the quantity of front metal secondary grid line (2), and every front metal secondary grid line (2) projection in vertical direction just is located between two adjacent back metal secondary grid line (3), front metal secondary grid line (2) and back metal secondary grid line (3) are parallel to each other.
2. The high bifacial rate bifacial solar cell metallization structure of claim 1, wherein a vertical projection of each front side metal subgrid (2) is located exactly in the middle of two adjacent back side metal subgrid (3).
3. The metallization structure of the double-sided solar cell with high double-sided rate as claimed in claim 1, wherein a plurality of parallel front metal main grid lines (4) are disposed on the front side of the cell body (1) above the front metal secondary grid lines (2), a plurality of parallel back metal main grid lines (5) are disposed on the back side of the cell body (1) above the back metal secondary grid lines (3), and the number of the front metal main grid lines (4) is the same as the number of the back metal main grid lines (5).
4. The metallization structure of a double-sided solar cell with high double-sided power as claimed in claim 3, wherein the front metal main grid lines (4) correspond to the back metal main grid lines (5) one by one, so that the vertical projection of the front metal main grid lines (4) is just inside the back metal main grid lines (5).
5. The metallization structure of a double-sided solar cell with high double-sided power as claimed in claim 3, wherein two ends of the front metal main grid line (4) extend out of the two front metal sub grid lines (2) at the outermost edge, and two ends of the back metal main grid line (5) extend out of the two back metal sub grid lines (3) at the outermost edge.
6. The metallization structure of a double-sided solar cell with high double-sided power as claimed in claim 3, wherein the front metal secondary grid lines (2) are orthogonal to the front metal secondary grid lines (2), and the back metal secondary grid lines (3) are orthogonal to the back metal secondary grid lines (3).
7. The metallization structure of a bifacial solar cell of claim 3, wherein the width of the front metal busbar (4) is 0.1-1mm, and the width of the back metal busbar (5) is 0.1-3 mm.
8. The high bifacial rate bifacial solar cell metallization structure of claim 1, wherein the width of the front side metal secondary grid lines (2) is 20-60 μm and the width of the back side metal secondary grid lines (3) is 20-300 μm.
9. The metallization structure of a bifacial solar cell with high bifacial rate as in claim 1, wherein the front metal secondary grid line (2) and the back metal secondary grid line (3) are made of silver or silver-aluminum alloy.
10. The metallization structure of a bifacial solar cell of claim 3, wherein the front metal busbar (4) and the back metal busbar (5) are made of silver or silver-aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922452860.XU CN210837774U (en) | 2019-12-30 | 2019-12-30 | Double-sided solar cell metallization structure with high double-sided rate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922452860.XU CN210837774U (en) | 2019-12-30 | 2019-12-30 | Double-sided solar cell metallization structure with high double-sided rate |
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| CN210837774U true CN210837774U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341855A (en) * | 2020-03-05 | 2020-06-26 | 江西展宇新能科技有限公司 | Double-sided battery structure |
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- 2019-12-30 CN CN201922452860.XU patent/CN210837774U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341855A (en) * | 2020-03-05 | 2020-06-26 | 江西展宇新能科技有限公司 | Double-sided battery structure |
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| TR01 | Transfer of patent right |
Effective date of registration: 20240523 Address after: 315600 No.1 Chuangxin East Road, Binhai New Area, South Ningbo, Ninghai County, Ningbo City, Zhejiang Province (self declared) Patentee after: Dongfang Risheng (Ningbo) Photovoltaic Technology Co.,Ltd. Country or region after: China Address before: 213251 No.1, Shuinan Road, Zhixi town industrial concentration zone, Jintan District, Changzhou City, Jiangsu Province Patentee before: DONGFANG RISHENG (CHANGZHOU) NEW ENERGY Co.,Ltd. Country or region before: China |
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