CN102842624A - Back electrode of polycrystalline silicon solar cell - Google Patents
Back electrode of polycrystalline silicon solar cell Download PDFInfo
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- CN102842624A CN102842624A CN 201110173373 CN201110173373A CN102842624A CN 102842624 A CN102842624 A CN 102842624A CN 201110173373 CN201110173373 CN 201110173373 CN 201110173373 A CN201110173373 A CN 201110173373A CN 102842624 A CN102842624 A CN 102842624A
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- back electrode
- solar cell
- cell
- polycrystalline silicon
- silicon solar
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Abstract
The invention discloses a back electrode of a polycrystalline silicon solar cell, wherein thin aluminium paste strip-type back electrodes are adopted, the distances from the two ends of the strip-type back electrodes to the corresponding edges of the cell are different, more than one back electrodes are arranged, and the distances from the same ends of the back electrodes to the same edges of the cell are the same; and the difference scope of the distances from the two ends of the back electrodes to the same edges of the cell is 15mm-25mm. Compared with the cell which is produced by the back electrode adopting a symmetrical design, the back electrode of the polycrystalline silicon solar cell provided by the invention has the advantages that the paste which is used for printing is low in unit consumption, and the power of an encapsulated solar cell module is increased.
Description
Technical field
The present invention relates to the polysilicon solar cell technology, relate in particular to a kind of back electrode of polysilicon solar cell.
Background technology
At present; The back electrode of 156 polycrystalline silicon solar cells mainly designs with whole symmetrical structure; The symmetrical structure design is comparatively convenient for the technology controlling and process in the production process; Need not to consider the influence of directivity to battery production, higher but the type relates to the slurry unit consumption, the production cost of battery is higher.The back electrode of 156 polysilicon solar cells that use now, its length is generally 130 ± 20mm, and the width of electrode and radical are different because of needs, and the distance at two end cell sheet edges of every back electrode equates, also is symmetric design; Perhaps the back electrode of polysilicon solar cell adopts and buries the grid structure; The type relates to can play electron collection effect preferably, but such structural design is higher to production technology and equipment requirements, need purchase very expensive production equipment; Technical process is very complicated, is unfavorable for large-scale production.
Summary of the invention
Goal of the invention: in order to overcome the deficiency that exists in the prior art, the present invention provides the back electrode of the few polysilicon solar cell of a kind of slurry unit consumption.
Technical scheme: for solving the problems of the technologies described above, the technical scheme of the present invention's sampling is:
A kind of back electrode of polysilicon solar cell; Adopt the bar shaped back electrode of thin slice aluminium paste; Its two ends are unequal apart from the distance of battery sheet respective edges, and the radical of said back electrode is more than one, and the same side of all back electrodes equates apart from the distance of battery sheet same edge.
The two ends of said back electrode are that 15mm is to 25mm apart from the distance scope of differing of battery sheet respective edges.
The length of the back electrode of 156 polysilicon solar cells of symmetrical expression is generally 130 ± 20mm, through this programme design, can reduce length to the 110 ± 20mm of back electrode; Like this, back electrode prints employed slurry unit consumption can reduce by 15% effect, and this mainly is because after shortening back electrode; The corresponding increase of area of the aluminium back of the body; Help the collection of light induced electron more, a back of the body area increases simultaneously, and the corresponding raising of the passivation effect of BSF causes efficient to rise.
Beneficial effect: the back electrode of polysilicon solar cell provided by the invention, compare with the battery sheet of the back electrode production of adopting symmetric design, print employed slurry unit consumption and reduce, the power of the solar module that is packaged into increases.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done explanation further.
Be depicted as a kind of back electrode 1 of 156 polysilicon solar cells like accompanying drawing 1; Adopt the bar shaped back electrode 1 of thin slice aluminium paste; Its two ends are unequal apart from the distance of battery sheet respective edges; The radical of said back electrode 1 is four, and the same side of all back electrodes 1 equates apart from the distance of battery sheet same edge; The length of said back electrode 1 is 115mm, and back electrode 1 two ends are respectively 10mm and 31mm apart from battery sheet Edge Distance.
The above only is a preferred implementation of the present invention; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (2)
1. the back electrode of a polysilicon solar cell; It is characterized in that: said back electrode is for adopting the bar shaped back electrode of thin slice aluminium paste; Its two ends are unequal apart from the distance of battery sheet respective edges; The radical of said back electrode is more than one, and the same side of all back electrodes equates apart from the distance of battery sheet same edge.
2. the back electrode of polysilicon solar cell according to claim 1, it is characterized in that: the two ends of said back electrode are that 15mm is to 25mm apart from the distance scope of differing of battery sheet respective edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110173373 CN102842624A (en) | 2011-06-26 | 2011-06-26 | Back electrode of polycrystalline silicon solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110173373 CN102842624A (en) | 2011-06-26 | 2011-06-26 | Back electrode of polycrystalline silicon solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102842624A true CN102842624A (en) | 2012-12-26 |
Family
ID=47369832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110173373 Pending CN102842624A (en) | 2011-06-26 | 2011-06-26 | Back electrode of polycrystalline silicon solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102842624A (en) |
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2011
- 2011-06-26 CN CN 201110173373 patent/CN102842624A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121226 |