CN203932077U - A kind of electrode structure at right side of MWT solar battery sheet - Google Patents
A kind of electrode structure at right side of MWT solar battery sheet Download PDFInfo
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- CN203932077U CN203932077U CN201420377891.8U CN201420377891U CN203932077U CN 203932077 U CN203932077 U CN 203932077U CN 201420377891 U CN201420377891 U CN 201420377891U CN 203932077 U CN203932077 U CN 203932077U
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Abstract
An electrode structure at right side for MWT solar battery sheet, described electrode structure at right side comprises at least 2 repetitives; Repetitive comprises the main grid line of meter font, and the both sides of each main grid line are equipped with symmetrically arranged secondary grid line; The main grid line that secondary grid line is corresponding with it intersects, and forms at least 2 parallel arrow structures; Grid line between adjacent repetitive is connected to arc syndeton; Each main grid line reduces gradually along the width of the outside dispersal direction of through hole electrode, and this width is stepped successively decreases; Along the outside dispersal direction of through hole electrode, the spacing between the parallel arrow structure on each main grid line reduces gradually.The utility model carries out further grid line structure optimization on existing structure, shading loss reduction when having realized power loss minimum; Compared with prior art, solar battery sheet of the present utility model all has lifting in short circuit current, open circuit voltage and photoelectric conversion efficiency; In addition, this structure also can reduce silver medal consumption.
Description
Technical field
The utility model relates to application of solar, relates in particular to a kind of electrode structure at right side of MWT solar battery sheet.
Background technology
Conventional fossil fuel is approach exhaustion day by day, and in existing sustainable energy, solar energy is undoubtedly the most clean, the most general and most potential a kind of alternative energy source.Device of solar generating is called again solar cell or photovoltaic cell, solar energy can be directly changed into electric energy, and its electricity generating principle is the photovoltaic effect of based semiconductor PN junction.At present, the most general structure of solar cell is that photronic both positive and negative polarity is placed in respectively to sensitive surface and shady face, and by low-resistance metal, realize positive and negative interconnected, but because the area in these a lot of regions of battery sensitive surface is blocked and lost one part of current by electrode.
Development along with solar energy generation technology, for improving the efficiency of the photoelectric conversion of the sun, people have developed new class " back of the body contact " battery, be characterized in cancelling solar cell sensitive surface in order to weld the main grid line of use, only retain a small amount of secondary grid line and be used for collecting sensitive surface electric current, electric current script sensitive surface being produced by technological means is guided to shady face, and in shady face relevant position, positive and negative electrode is set, thereby can reduce the shading of sensitive surface, increase photoelectric conversion efficiency, and be beneficial to interconnecting between photocell.
In back of the body contact battery, MWT(Metallization Wrap Through) solar cell is the maximum class of application.The electrode structure at right side of its MWT solar battery sheet is universalness also, and existing electrode structure at right side comprises at least 2 repetitives (be generally 3 * 3 or 4 * 4 matrix structure, comprise 9 or 16 repetitives); Described repetitive generally comprises the main grid line of meter font, and rice font main grid Xian center is through hole electrode; And the both sides of each main grid line are equipped with symmetrically arranged secondary grid line; The main grid line that secondary grid line is corresponding with it intersects, and forms at least 2 parallel arrow structures; Shown in accompanying drawing 1,2.
Yet, practical application is found, there are the following problems for the electrode structure at right side of above-mentioned MWT solar battery sheet: (1) is for the convenience of silk screen printing, the width of existing each main grid line is wide, spacing between parallel arrow structure on each main grid line is all also identical, this has just caused shading loss, if and directly reduce grid line width, can cause current delivery loss, shading loss and electricity loss is not optimum Match, cause there is loss in efficiency, finally cause power loss.Therefore, how to carry out the optimization of grid line structure, to realize power loss minimum, the loss reduction of shading simultaneously, has positive practical significance; (2) existing electrode structure at right side, in screen printing process, because the angle of throwing the net of secondary grid line angle and silk screen printing is consistent, is all 22.5 degree, and in printing process, the grid line in some region is " wave " shape, causes line resistance larger; (3), for further cost efficiency, the silver-colored consumption that reduces front electrode is also absolutely necessary.
Summary of the invention
The utility model object is to provide a kind of electrode structure at right side of MWT solar battery sheet.
For achieving the above object, the technical solution adopted in the utility model is: a kind of electrode structure at right side of MWT solar battery sheet, and described electrode structure at right side comprises at least 2 repetitives; Described repetitive comprises the main grid line of meter font, and rice font main grid Xian center is through hole electrode; The both sides of each main grid line are equipped with symmetrically arranged secondary grid line; The main grid line that secondary grid line is corresponding with it intersects, and forms at least 2 parallel arrow structures;
Grid line between adjacent repetitive is connected to arc syndeton;
Described each main grid line reduces gradually along the width of the outside dispersal direction of through hole electrode, and this width is stepped successively decreases;
Along the outside dispersal direction of through hole electrode, the spacing between the parallel arrow structure on each main grid line reduces gradually.
Above, described repetitive is prior art, is 3 * 3 or 4 * 4 matrix structure on general cell piece, comprises 9 or 16 repetitives.
Grid line between described adjacent repetitive is connected to arc syndeton, refers to that grid line junction carries out cambering processing, rather than original bending shape.Be more convenient for like this reducing current delivery loss between battery unit.
Described each main grid line reduces gradually along the width of the outside dispersal direction of through hole electrode, and this width is stepped successively decreases; Here the successively decrease width that refers to main grid line of stepped is one section one section and successively decreases, the one section one section main grid line segment referring between adjacent 2 arrow structures here; Be that main grid line segment between adjacent 2 arrow structures is not that continuous width successively decreases.Experiment showed, shading loss reduction when this structure can realize power loss minimum.
In technique scheme, in the main grid line of described rice font, angle between its corresponding secondary grid line of main grid line of level and vertical direction is 19.5 ~ 20.5 degree, and the angle between its corresponding secondary grid line of main grid line of other incline directions is 24.5 ~ 25.5 degree.
Preferably, in the main grid line of described rice font, the angle between its corresponding secondary grid line of main grid line of level and vertical direction is 20 degree, and the angle between its corresponding secondary grid line of main grid line of other incline directions is 25 degree.Experiment showed, that this structure can effectively avoid the complete even interrupted situation of grid line of printing in screen printing process.
In technique scheme, the width of described main grid line is 0.05 ~ 0.20 mm.The width that is main grid line successively decreases within the scope of 0.20mm ~ 0.05mm.
In technique scheme, the spacing between the parallel arrow structure on each main grid line is 1.55 ~ 2.0 microns.Be that spacing reduces gradually in 2.0 microns ~ 1.55 micrometer ranges.
Because technique scheme is used, the utlity model has following advantages:
1, the utility model has designed a kind of electrode structure at right side of MWT solar battery sheet, carries out further grid line structure optimization on existing structure, shading loss reduction when having realized power loss minimum; Experiment showed, compared with prior art, solar battery sheet of the present utility model all has lifting in short circuit current, open circuit voltage and photoelectric conversion efficiency; In addition, this structure also can reduce silver medal consumption, and silver medal consumption approximately reduces by 18% left and right, thereby has reduced cost, has positive practical significance;
2, the utility model is optimized the angle between the secondary grid line on main grid line, experiment showed, that this structure can effectively avoid the complete even interrupted situation of grid line of printing in screen printing process, has fabulous practicality;
3, of the present utility model simple in structure, practicality is stronger, is suitable for applying.
Accompanying drawing explanation
Fig. 1 is the structural representation of the electrode structure at right side of MWT solar battery sheet in background technology.
Fig. 2 is the A portion enlarged drawing of Fig. 1.
Fig. 3 is the structural representation of the utility model embodiment mono-.
Fig. 4 is the structural representation of repetitive in the utility model embodiment mono-.
Fig. 5 is the B portion enlarged drawing of Fig. 3.
Fig. 6 is the structural representation in the lower right corner of repetitive in the utility model embodiment mono-.
Wherein: 1, main grid line; 2, secondary grid line.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described:
Embodiment mono-
Shown in Fig. 3 ~ 6, a kind of electrode structure at right side of MWT solar battery sheet, described electrode structure at right side comprises 16 repetitives, is 4 * 4 matrix structure; Described repetitive comprises the main grid line 1 of meter font, and rice font main grid Xian center is through hole electrode; The both sides of each main grid line are equipped with symmetrically arranged secondary grid line 2; The main grid line that secondary grid line is corresponding with it intersects, and forms at least 2 parallel arrow structures; In the present embodiment, on the main grid line of level and vertical direction, there are 3 parallel arrow structures, on the main grid line of other incline directions, there are 6 parallel arrow structures, shown in Figure 4;
Grid line between described adjacent repetitive is connected to arc syndeton; Shown in Figure 5;
Described each main grid line reduces gradually along the width of the outside dispersal direction of through hole electrode, and this width is stepped successively decreases; Shown in Figure 6, the width of A1, A2, A3, A4 is respectively 139 microns, 112 microns, 78 microns and 50 microns;
Along the outside dispersal direction of through hole electrode, the spacing between the parallel arrow structure on each main grid line reduces gradually.Shown in Figure 4, a, b, c, d, e are respectively 1.65 microns, 1.7 microns, 1.8 microns, 1.9 microns, 2.0 microns; X, y, z is respectively 2.0 microns, 1.9 microns, 1.8 microns.
Above, the grid line between described adjacent repetitive is connected to arc syndeton, refers to that grid line junction carries out cambering processing, rather than original bending shape.Be more convenient for like this reducing current delivery loss between battery unit.
Described each main grid line reduces gradually along the width of the outside dispersal direction of through hole electrode, and this width is stepped successively decreases; Here the successively decrease width that refers to main grid line of stepped is one section one section and successively decreases, the one section one section main grid line segment referring between adjacent 2 arrow structures here; Be that main grid line segment between adjacent 2 arrow structures is not that continuous width successively decreases.Experiment showed, shading loss reduction when this structure can realize power loss minimum.
In technique scheme, in the main grid line of described rice font, the angle between its corresponding secondary grid line of main grid line of level and vertical direction is 20 degree, and the angle between its corresponding secondary grid line of main grid line of other incline directions is 25 degree.Shown in Figure 6, angle i is 25 degree, and angle ii is 20 degree.Experiment showed, that this structure can effectively avoid the complete even interrupted situation of grid line of printing in screen printing process.
Claims (5)
1. an electrode structure at right side for MWT solar battery sheet, described electrode structure at right side comprises at least 2 repetitives; Described repetitive comprises the main grid line (1) of meter font, and rice font main grid Xian center is through hole electrode; The both sides of each main grid line are equipped with symmetrically arranged secondary grid line (2); The main grid line that secondary grid line is corresponding with it intersects, and forms at least 2 parallel arrow structures; It is characterized in that:
Grid line between adjacent repetitive is connected to arc syndeton;
Described each main grid line reduces gradually along the width of the outside dispersal direction of through hole electrode, and this width is stepped successively decreases;
Along the outside dispersal direction of through hole electrode, the spacing between the parallel arrow structure on each main grid line reduces gradually.
2. the electrode structure at right side of MWT solar battery sheet according to claim 1, it is characterized in that: in the main grid line of described rice font, angle between its corresponding secondary grid line of main grid line of level and vertical direction is 19.5 ~ 20.5 degree, and the angle between its corresponding secondary grid line of main grid line of other incline directions is 24.5 ~ 25.5 degree.
3. the electrode structure at right side of MWT solar battery sheet according to claim 2, it is characterized in that: in the main grid line of described rice font, angle between its corresponding secondary grid line of main grid line of level and vertical direction is 20 degree, and the angle between its corresponding secondary grid line of main grid line of other incline directions is 25 degree.
4. the electrode structure at right side of MWT solar battery sheet according to claim 1, is characterized in that: the width of described main grid line is 0.05 ~ 0.20 mm.
5. the electrode structure at right side of MWT solar battery sheet according to claim 1, is characterized in that: the spacing between the parallel arrow structure on each main grid line is 1.55 ~ 2.0 microns.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420377891.8U CN203932077U (en) | 2014-07-09 | 2014-07-09 | A kind of electrode structure at right side of MWT solar battery sheet |
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| CN201420377891.8U CN203932077U (en) | 2014-07-09 | 2014-07-09 | A kind of electrode structure at right side of MWT solar battery sheet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104851927A (en) * | 2015-05-26 | 2015-08-19 | 苏州大学 | Right-side electrode structure of MWT crystalline silicon solar cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104851927A (en) * | 2015-05-26 | 2015-08-19 | 苏州大学 | Right-side electrode structure of MWT crystalline silicon solar cell |
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