CN105428429A - Solar cell back electrode structure - Google Patents
Solar cell back electrode structure Download PDFInfo
- Publication number
- CN105428429A CN105428429A CN201510769435.7A CN201510769435A CN105428429A CN 105428429 A CN105428429 A CN 105428429A CN 201510769435 A CN201510769435 A CN 201510769435A CN 105428429 A CN105428429 A CN 105428429A
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- Prior art keywords
- back electrode
- solar cell
- electrode structure
- back electrodes
- electrodes
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- 230000000694 effects Effects 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000005684 electric field Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to the technical field of crystalline silicon solar cells, and particularly relates to a solar cell back electrode structure. The solar cell back electrode structure comprises multiple rows of block first back electrodes (1) which are arranged at the back of a solar cell. Each row of first back electrodes (1) are divided into multiple segments. The solar cell back electrode structure also comprises multiple rows of fine line second back electrodes (2) which are perpendicular to the first back electrodes (1) and multiple rows of fine line third back electrodes (3) which are perpendicular to the second back electrodes. Besides, the width ratio of the first back electrodes (1) to the second back electrodes (2) is 10-100, and the width ratio of the first back electrodes (1) to the third back electrodes (3) is 10-100. With application of the back electrode structure, the effect of back electrode current collection can be greatly enhanced, and transmission speed of cell current can also be enhanced.
Description
Technical field
The present invention relates to crystal silicon solar energy battery technical field, particularly relate to a kind of back electrode of solar cell structure.
Background technology
Conventional rear surface of solar cell silver electrode (abbreviation back electrode) is set to three rows or four rows usually, all adopts the back electrode of segmented, and namely often arrange back electrode and be equally divided into multistage, the length of every section is identical, and spacing between every section is identical.As shown in Figure 1 and Figure 2.Because the photo-generated carrier of solar cell generation is on whole battery surface, electric current is pooled to above back electrode from back of the body electric field, back of the body electric field relies on cross section with back electrode and contacts, existing segmented back electrode, area of section is less, so cause the effect of back electrode collected current poor, and because the electric current that back electrode is collected needs to be exported by welding, and contact area between back electrode and welding is also less, so cause the transmission of battery current slower.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of back electrode of solar cell structure, adopts this back electrode structure greatly can improve the effect of back electrode collected current, and improves the transmission speed of battery current.
The technical solution adopted in the present invention is: a kind of back electrode of solar cell structure, comprise block first back electrode of the many rows being arranged on rear surface of solar cell, often ranked first back electrode and be divided into multistage, it also comprises many rows thin-line-shaped second back electrode vertical with the first back electrode and arranges thin-line-shaped three back electrode vertical with the second back electrode more, and described first back electrode is 10-100 with the ratio of the width of the second back electrode, described first back electrode is 10-100 with the ratio of the width of the 3rd back electrode.
Every bar second back electrode is all through the first back electrode.
Described every bar second back electrode all blocks through the part overlapped with the first back electrode after the first back electrode and removes.
Every article of the 3rd back electrode is all through the first back electrode.
Described every article of the 3rd back electrode all blocks through the part overlapped with the first back electrode after the first back electrode and removes.
Described second back electrode is identical with the width of the 3rd back electrode, and described first back electrode is 20-50 with the ratio of the width of the second back electrode.
Adopt above structure compared with prior art, the present invention has the following advantages: arrange the second back electrode and the 3rd back electrode, make the area of section of back electrode larger like this, and then make the effect of back electrode collected current better, and because the area of back electrode becomes large, so cause the contact area of back electrode and welding to become large, so just make the efficiency of transmission of battery current very fast.
Those are only selected to pass the second back electrode of the first back electrode, because electric current finally needs to be flowed on the first back electrode, so only retain those second back electrodes namely contacting the first back electrode through the first back electrode namely can reach the object making electric current collection better effects if, cost also can not be made to improve too many.
The part that second back electrode overlaps with the first back electrode is removed, because both materials are the same, the function played also is the same, so this part is removed the collection not affecting electric current, and can a part of production cost be reduced simultaneously, and slightly reduce the thickness of cell piece.
Those are only selected to pass the 3rd back electrode of the first back electrode, because electric current finally needs to be flowed on the first back electrode, so only retain those second back electrodes namely contacting the first back electrode through the first back electrode namely can reach the object making electric current collection better effects if, cost also can not be made to improve too many.
The part that 3rd back electrode overlaps with the first back electrode is removed, because both materials are the same, the function played also is the same, so this part is removed the collection not affecting electric current, and can a part of production cost be reduced simultaneously, and slightly reduce the thickness of cell piece.
That the second back electrode and the width of the 3rd back electrode are done is the same, such processing is got up more convenient, and the ratio of the second back electrode and the width between the 3rd back electrode and the first back electrode is made 20-50, so every article of first back electrode just can be used for more article of the 3rd back electrode pass, make the collecting effect of electric current on battery better, and because both thickness disparities are comparatively large, thus after adding the second back electrode and the 3rd back electrode cost not obvious.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that prior art back electrode of solar cell is provided with three rows.
Fig. 2 is the schematic diagram that prior art back electrode of solar cell is provided with four rows.
Fig. 3 is the schematic diagram of the specific embodiment one of the application.
Fig. 4 is the schematic diagram of the specific embodiment two of the application.
Fig. 5 is the schematic diagram of the specific embodiment three of the application.
Fig. 6 is the schematic diagram of the specific embodiment four of the application.
As shown in the figure: 1, the first back electrode; 2, the second back electrode; 3, the 3rd back electrode.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described further, but the present invention is not limited only to following embodiment.
Specific embodiment one:
Design back electrode scheme of the present invention as shown in Figure 3, three ranked first back electrode, first back electrode width is 2 millimeters, the width of the second back electrode and the 3rd back electrode is 40 microns, wherein the second back electrode is 85, equidistant Parallel Design, and the 3rd back electrode is 9, often ranked first back electrode and be provided with 3, three the 3rd back electrodes often on row are also equidistant arrangements.Ranked first compared with back electrode Fig. 1 with tradition three, when carrying out battery efficiency test, uniform current can be pooled on the first back electrode by the second back electrode and the 3rd back electrode, is pooled on test probe, can test battery efficiency more exactly.In like manner when packaged battery assembly, welding welds together with the first back electrode, and electric current can be pooled on welding by the second back electrode and the 3rd back electrode of the present invention's design effectively, the power output of lifting subassembly.
Specific embodiment two:
Design back electrode scheme of the present invention as shown in Figure 4, four ranked first back electrode, first back electrode width is 2 millimeters, the width of the second back electrode and the 3rd back electrode is 40 microns, wherein the second back electrode is 70, equidistant Parallel Design, the 3rd back electrode is 8, often ranked first back electrode and is provided with 2 the 3rd back electrodes.Ranked first compared with back electrode Fig. 1 with tradition four, when carrying out battery efficiency test, uniform current can be pooled on the first back electrode by the second back electrode and the 3rd back electrode, is pooled on test probe, can test battery efficiency more exactly.In like manner when packaged battery assembly, welding welds together with the first back electrode, and electric current can be pooled on welding by the second back electrode and the 3rd back electrode of the present invention's design effectively, the power output of lifting subassembly.
Specific embodiment three:
As shown in Figure 5: be on the basis of specific embodiment one, part second back electrode not through the first back electrode is deleted, certain cost can be reduced like this.
Specific embodiment four:
As shown in Figure 6: be on the basis of specific embodiment two, part second back electrode not through the first back electrode is deleted, so also can reduce certain cost.
And the part that in four specific embodiments, all second back electrodes and the 3rd back electrode overlap with the first back electrode all can be deleted, namely delete be on part second back electrode and on part the 3rd back electrode, but from length, 3rd back electrode is because be horizontally disposed, and the first back electrode sees it is also horizontally disposed from figure, so the 3rd back electrode and the first back electrode have major part overlapping, so the 3rd back electrode is left out more.
Claims (6)
1. a back electrode of solar cell structure, comprise block first back electrode (1) of the many rows being arranged on rear surface of solar cell, often ranked first back electrode (1) and be divided into multistage, it is characterized in that: it also comprises many rows thin-line-shaped second back electrode (2) vertical with the first back electrode (1) and arranges thin-line-shaped three back electrode (3) vertical with the second back electrode more, and described first back electrode (1) is 10-100 with the ratio of the width of the second back electrode (2), described first back electrode (1) is 10-100 with the ratio of the width of the 3rd back electrode (3).
2. back electrode of solar cell structure according to claim 1, is characterized in that: every bar second back electrode (2) is all through the first back electrode (1).
3. back electrode of solar cell structure according to claim 2, is characterized in that: the part that described every bar second back electrode (2) overlaps with the first back electrode (1) afterwards through the first back electrode (1) is all blocked and removes.
4. back electrode of solar cell structure according to claim 1, is characterized in that: every article the 3rd back electrode (3) is all through the first back electrode (1).
5. back electrode of solar cell structure according to claim 4, is characterized in that: the part that described every article of the 3rd back electrode (3) overlaps with the first back electrode (1) afterwards through the first back electrode (1) is all blocked and removes.
6. back electrode of solar cell structure according to claim 1, is characterized in that: described second back electrode (2) is identical with the width of the 3rd back electrode (3), and described first back electrode (1) is 20-50 with the ratio of the width of the second back electrode (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510769435.7A CN105428429B (en) | 2015-11-12 | 2015-11-12 | Solar cell back electrode structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510769435.7A CN105428429B (en) | 2015-11-12 | 2015-11-12 | Solar cell back electrode structure |
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| Publication Number | Publication Date |
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| CN105428429A true CN105428429A (en) | 2016-03-23 |
| CN105428429B CN105428429B (en) | 2017-04-12 |
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| CN201510769435.7A Active CN105428429B (en) | 2015-11-12 | 2015-11-12 | Solar cell back electrode structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201349002Y (en) * | 2008-11-28 | 2009-11-18 | 宁波尤利卡太阳能科技发展有限公司 | Back plate electrode structure of crystalline silicon solar cell plate |
| CN202695462U (en) * | 2012-04-10 | 2013-01-23 | 百力达太阳能股份有限公司 | Sectional-type positive-electrode highly-efficient solar cell sheet |
| CN202712196U (en) * | 2012-05-27 | 2013-01-30 | 苏州阿特斯阳光电力科技有限公司 | Back electrode structure of N type back-contact bifacial solar cell |
| CN202957258U (en) * | 2012-11-13 | 2013-05-29 | 常州亿晶光电科技有限公司 | Crystalline silicon solar battery and front side electrode thereof |
| CN203377218U (en) * | 2013-07-26 | 2014-01-01 | 西安黄河光伏科技股份有限公司 | Five-main grid solar crystalline silicon solar cell |
| CN104362190A (en) * | 2014-10-13 | 2015-02-18 | 山东力诺太阳能电力股份有限公司 | Interdigital electrode for solar cell |
-
2015
- 2015-11-12 CN CN201510769435.7A patent/CN105428429B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201349002Y (en) * | 2008-11-28 | 2009-11-18 | 宁波尤利卡太阳能科技发展有限公司 | Back plate electrode structure of crystalline silicon solar cell plate |
| CN202695462U (en) * | 2012-04-10 | 2013-01-23 | 百力达太阳能股份有限公司 | Sectional-type positive-electrode highly-efficient solar cell sheet |
| CN202712196U (en) * | 2012-05-27 | 2013-01-30 | 苏州阿特斯阳光电力科技有限公司 | Back electrode structure of N type back-contact bifacial solar cell |
| CN202957258U (en) * | 2012-11-13 | 2013-05-29 | 常州亿晶光电科技有限公司 | Crystalline silicon solar battery and front side electrode thereof |
| CN203377218U (en) * | 2013-07-26 | 2014-01-01 | 西安黄河光伏科技股份有限公司 | Five-main grid solar crystalline silicon solar cell |
| CN104362190A (en) * | 2014-10-13 | 2015-02-18 | 山东力诺太阳能电力股份有限公司 | Interdigital electrode for solar cell |
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| CN105428429B (en) | 2017-04-12 |
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Address after: No. 181-197, Shanshan Road, Wangchun Industrial Park, Haishu District, Ningbo City, Zhejiang Province, 315177 Patentee after: Ningbo Eureka solar energy Co., Ltd Address before: 315177 Zhejiang city of Ningbo province Yinzhou District Wang Shanshan Lu Chun Industrial Park No. 181 Patentee before: NINGBO ULICA SOLAR TECHNOLOGY DEVELOPMENT Co.,Ltd. |