CN203026517U - Back electrode structure of solar battery - Google Patents
Back electrode structure of solar battery Download PDFInfo
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- CN203026517U CN203026517U CN 201220733372 CN201220733372U CN203026517U CN 203026517 U CN203026517 U CN 203026517U CN 201220733372 CN201220733372 CN 201220733372 CN 201220733372 U CN201220733372 U CN 201220733372U CN 203026517 U CN203026517 U CN 203026517U
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Abstract
The utility model provides a back electrode structure of a solar battery. The back electrode structure comprises a plurality of metal electrodes which are in parallel, wherein each metal electrode comprises a plurality of wide electrodes and a plurality of narrow electrodes, which are arranged alternatively along the parallel direction, the adjacent wide electrode and the narrow electrode are arranged at an interval. The back electrode structure of the solar battery comprises the wide electrodes and the narrow electrodes, the wide electrodes can effectively ensure the welding strength of a welding strip, the narrow electrodes not only is beneficial to reduction of contact electrodes, but also can enable the current collected to be directly conducted onto the welding strip, so that the power loss of solar battery assemblies in packaging can be effectively reduced.
Description
Technical field
The utility model relates to area of solar cell, relates in particular to a kind of back electrode structure of solar cell.
Background technology
In the prior art, the back electrode structure of solar cell adopts the pattern of discontinuous back electrode usually.Fig. 1 is the structural representation of discontinuous back electrode of solar cell in prior art, as shown in the figure, the back of the body electric field 100(that the back electrode of solar cell is positioned at solar cell is generally the aluminium back surface field) on, described back electrode comprises a plurality of parallel metal electrodes 110, each described metal electrode 110 further comprises again a plurality of electrode units 111, wherein, there is certain interruption 112 between two adjacent electrode units 111.Owing to having discontiguous area in the discontinuous back electrode structure, therefore, the discontinuous back electrode structure can reduce the use amount of the slurry (being generally the silver slurry) that is used to form back electrode effectively, not only the production cost of solar cell can be reduced, the open circuit voltage of solar cell can also be improved.
But also there is certain weak point in above-mentioned discontinuous back electrode structure.Particularly, the discontiguous area that exists in the discontinuous back electrode structure can't weld with welding, and so, from an aspect, when the solar cell layer swaging was become assembly, the interruption part in back electrode structure was larger with the contact resistance of welding; Say from another point of view, due to the linear resistivity of the welding linear resistivity much smaller than back of the body electric field (being generally the aluminium back surface field), therefore, when the electric current of the collection of the discontiguous area in back electrode structure is transmitted to welding, will be through the conduction of the relatively large back of the body electric field of resistance, like this, larger than the power loss that is directly transferred to welding place generation, thereby cause component power loss ratio welding and back electrode directly the situation of welding to relatively increase, this is unfavorable for solar module CTM(Cell-To-Module) raising.
Therefore, wish to propose a kind of back electrode structure of the solar cell that can address the above problem.
The utility model content
For realizing that the purpose of this utility model provides a kind of back electrode structure of solar cell, be beneficial to the power loss that reduces the solar module encapsulation.
According to one side of the present utility model, a kind of back electrode structure of solar cell is provided, comprise a plurality of parallel metal electrodes, wherein:
Described metal electrode comprises along a plurality of wide electrode and a plurality of narrow electrode described and that line direction is arranged alternately, wherein, exists between described wide adjacent electrode and described narrow electrode and is interrupted.
According to another aspect of the present utility model, the distance range of the interruption between described wide electrode and described narrow electrode is 0.01mm-50mm.
According to another aspect of the present utility model, the width of described narrow electrode is the 1/15-3/4 of described wide electrode width.
According to another aspect of the present utility model, the width range of described wide electrode is 0.5mm-4mm.
According to another aspect of the present utility model, in each described metal electrode, total length sum of described narrow electrode and described wide electrode is 0.3 times-1.0 times of solar battery sheet length.
According to another aspect of the present utility model, in each described metal electrode, the total length of described wide electrode is 0.1 times-0.9 times of solar battery sheet length, or the total length of described narrow electrode is 0.1 times-0.9 times of solar battery sheet length.
According to another aspect of the present utility model, the number of described metal electrode is the 2-6 bar.
According to another aspect of the present utility model, described metal electrode is evenly arranged at the back side of solar cell.
compared with prior art, the back electrode structure of solar cell provided by the utility model comprises wide electrode of alternative arrangement and narrow electrode, and there be certain interruption between wide adjacent electrode and narrow electrode, wherein, when wide electrode and welding welding, because the width of wide electrode is larger, thereby can effectively guarantee the weld strength of itself and welding, and when narrow electrode and welding welding, not only be beneficial to and reduce contact resistance, and the electric current of narrow electrode collection can be directly transferred on welding, thereby effectively reduced the conduction resistance of electric current at back of the body electric field, and then the power loss when effectively having reduced the solar module encapsulation.
Description of drawings
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present utility model will become:
Fig. 1 is the structural representation of discontinuous back electrode of solar cell in prior art;
Fig. 2 is the structural representation according to back electrode of solar cell of the present utility model; And
Fig. 3 is the local enlarged diagram in the zone 1 that in Fig. 2, solid line encloses.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
The utility model provides a kind of back electrode structure of solar cell.Please refer to Fig. 2, Fig. 2 is the structural representation according to back electrode of solar cell of the present utility model.As shown in the figure, described back electrode structure is positioned on the back of the body electric field 200 of solar cell.Described back electrode structure comprises that a plurality of parallel metal electrode 210(please refer to the part that in figure, with dashed lines encloses), wherein, described metal electrode 210 comprises along a plurality of wide electrode 211 and a plurality of narrow electrode 212 described and that line direction is arranged alternately, an i.e. described wide electrode 211 and described narrow adjacent arrangement of electrode 212, and, exist between described wide adjacent electrode 211 and described narrow electrode 212 and be interrupted.
The width of described wide electrode 211 is greater than the width of described narrow electrode 212.In the present embodiment, the width range of described wide electrode 211 is 0.5mm-4mm, and the width of described narrow electrode 212 is the 1/15-3/4 of described wide electrode width.
Preferably, the part that with dashed lines encloses in each described metal electrode 210(please refer to figure) in, total length sum of described wide electrode 211 and described narrow electrode 212 (being the length sum of wide electrode all in each described metal electrode 210 211 and all narrow electrode 212) is 0.3 times-1.0 times of solar battery sheet length.Wherein, the total length sum of described wide electrode 211 is preferably 0.1 times-0.9 times of solar battery sheet length, and perhaps the total length sum of described narrow electrode 212 is preferably 0.1 times-0.9 times of solar battery sheet length.
Please continue with reference to figure 2 in conjunction with Fig. 3, wherein, Fig. 3 is the local enlarged diagram in the zone 1 that in Fig. 2, solid line encloses.The zone 1 that in Fig. 2, solid line encloses is described wide adjacent electrode 211 and the discontiguous area between described narrow electrode 212.In the present embodiment, distance (representing with L in Fig. 3) scope of the interruption between described wide electrode 211 and described narrow electrode 212 is preferably 0.01mm-50mm.
Preferably, the number of described metal electrode 210 is the 2-6 bar, and is evenly arranged on the back of the body electric field 200 of solar cell.
In the present embodiment, described back of the body electric field 200 is the aluminium back surface field, and described back electrode is silver-colored back electrode.
compared with prior art, the back electrode structure of solar cell provided by the utility model comprises wide electrode of alternative arrangement and narrow electrode, and there be certain interruption between wide adjacent electrode and narrow electrode, wherein, when wide electrode and welding welding, because the width of wide electrode is larger, thereby can effectively guarantee the weld strength of itself and welding, and when narrow electrode and welding welding, not only be beneficial to and reduce contact resistance, and the electric current of narrow electrode collection can be directly transferred on welding, thereby effectively reduced the conduction resistance of electric current at back of the body electric field, and then the power loss when effectively having reduced the solar module encapsulation.
Above disclosed is only several preferred embodiment of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (8)
1. the back electrode structure of a solar cell, comprise a plurality of parallel metal electrodes (210), it is characterized in that:
Described metal electrode (210) comprises along a plurality of wide electrode (211) and a plurality of narrow electrodes (212) described and that line direction is arranged alternately, wherein, there is interruption (213) between adjacent described wide electrode (211) and described narrow electrode (212).
2. back electrode structure according to claim 1 is characterized in that:
The distance range of the interruption (213) between described wide electrode (211) and described narrow electrode (212) is 0.01mm-50mm.
3. back electrode structure according to claim 1 and 2, is characterized in that, the width of described narrow electrode (212) is the 1/15-3/4 of described wide electrode (211) width.
4. back electrode structure according to claim 3, is characterized in that, the width range of described wide electrode (211) is 0.5mm-4mm.
5. back electrode structure according to claim 1 and 2 is characterized in that:
In each described metal electrode (210), total length sum of described narrow electrode (212) and described wide electrode (211) is 0.3 times-1.0 times of solar battery sheet length.
6. back electrode structure according to claim 5 is characterized in that:
In each described metal electrode (210), the total length of described wide electrode (211) is 0.1 times-0.9 times of solar battery sheet length, or the total length of described narrow electrode (212) is 0.1 times-0.9 times of solar battery sheet length.
7. back electrode structure according to claim 1 and 2, is characterized in that, the number of described metal electrode (210) is the 2-6 bar.
8. back electrode structure according to claim 7, is characterized in that, described metal electrode (210) is evenly arranged at the back side of solar cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733372 CN203026517U (en) | 2012-12-27 | 2012-12-27 | Back electrode structure of solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733372 CN203026517U (en) | 2012-12-27 | 2012-12-27 | Back electrode structure of solar battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026517U true CN203026517U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220733372 Expired - Lifetime CN203026517U (en) | 2012-12-27 | 2012-12-27 | Back electrode structure of solar battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN203026517U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817274A (en) * | 2017-10-27 | 2018-03-20 | 无锡尚德太阳能电力有限公司 | The decision method of solar cell processing procedure defect |
-
2012
- 2012-12-27 CN CN 201220733372 patent/CN203026517U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817274A (en) * | 2017-10-27 | 2018-03-20 | 无锡尚德太阳能电力有限公司 | The decision method of solar cell processing procedure defect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220615 Address after: 314417 No. 1 Jisheng Road, Jiaxing City, Zhejiang Province Patentee after: Zhengtai Xinneng Technology Co.,Ltd. Address before: 310053 No. 1335 Bin'an Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: CHINT SOLAR (ZHEJIANG) Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |