A kind of positive electrode of solar battery sheet
Technical field
The utility model relates to solar battery sheet, particularly relates to a kind of positive electrode of solar battery sheet.
Background technology
Solar battery sheet is becoming transform light energy in the process of electric energy, and its inner photo-generated carrier that produces needs the electrode of outside printing to collect and draw, and then is connected with external circuit, thereby electric current is exported.And the positive electrode of solar battery sheet forms by the printing of conductive noble metal slurry, and it is in the front of solar battery sheet, also is sensitive surface, therefore requires the shading-area of positive electrode as far as possible little, and the resistance of generation is also as far as possible less.
See also Fig. 1, it illustrates the positive electrode of a kind of solar battery sheet of prior art, comprise three main grid lines 10 and many secondary grid lines 20, wherein said three main grid lines 10 are parallel to each other and evenly interval setting, described many secondary grid lines 20 are arranged in parallel, described three main grid lines 10 intersect vertically with described many secondary grid lines 20 respectively, and the width of described main grid line 10 is greater than the width of described secondary grid line 20.Solar battery sheet is collected by described secondary grid line 20 by the electric current that opto-electronic conversion forms, and then imports described main grid line 10 rear outputs.
In the positive electrode of the solar battery sheet of prior art, the live width of described main grid line 10 is all wider, and is the solid wire shape, causes like this shading-area larger, has reduced the conversion efficiency of solar battery sheet.
And the electrode of solar battery sheet is the printing of conductive noble metal slurry, and in the prior art, the use amount of electrocondution slurry is difficult to reduce, and it is larger that its cost accounts for whole cell piece production cost proportion.Therefore, how reducing the electrocondution slurry use amount to reduce the manufacturing cost of solar battery sheet, also is an outstanding task that needs to be resolved hurrily.
Summary of the invention
The purpose of this utility model is the defective that overcomes prior art, and a kind of positive electrode of solar battery sheet is provided, with the conversion efficiency of raising solar battery sheet, and the use amount of minimizing electrocondution slurry, thereby the production cost of reduction solar battery sheet.
For achieving the above object, the utility model provides a kind of positive electrode of solar battery sheet, comprise three main grid lines and many secondary grid lines, wherein said three main grid lines are parallel to each other and evenly interval setting, many secondary grid line is arranged in parallel, described three main grid lines intersect vertically with described many secondary grid lines respectively, and the width of described main grid line is characterized in that greater than the width of described secondary grid line: be provided with the rectangular apertures that a plurality of intervals arrange in the described main grid line.
Preferably, the size of described a plurality of rectangular apertures is identical.
Preferably, described a plurality of rectangular apertures arranges along the even interval of the length direction of described main grid line.More preferably, the length of described rectangular apertures is greater than the spacing distance between two adjacent rectangular apertures.
Compared with prior art, the positive electrode of a kind of solar battery sheet that the utility model provides, its main grid line is provided with the rectangular apertures that a plurality of intervals arrange, reduced on the one hand the shading-area of positive electrode, improved the conversion efficiency of solar battery sheet, significantly reduce on the other hand the use amount of electrocondution slurry, reduced the manufacturing cost of solar battery sheet.
Description of drawings
Fig. 1 is the positive electrode schematic diagram of a kind of solar battery sheet of prior art.
Fig. 2 is the positive electrode schematic diagram of a kind of solar battery sheet of the utility model.
Fig. 3 is the A section enlarged drawing among Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated.
See also Fig. 2 and Fig. 3, the utility model provides a kind of positive electrode of solar battery sheet, comprise three main grid lines 30 and many secondary grid lines 40, wherein said three main grid lines 30 are parallel to each other and evenly interval setting, many secondary grid line 40 is arranged in parallel, described three main grid lines 30 intersect vertically with described many secondary grid lines 40 respectively, and the width of described main grid line 30 is characterized in that greater than the width of described secondary grid line 40: be provided with the rectangular apertures 31 that a plurality of intervals arrange in the described main grid line 30.In present embodiment, the size of described a plurality of rectangular apertures 31 is identical, and described a plurality of rectangular apertures 31 arranges along the even interval of the length direction of described main grid line 30, and the length D of described rectangular apertures 31 is greater than the spacing distance L between two adjacent rectangular apertures.
Compared with prior art, the positive electrode of a kind of solar battery sheet that the utility model provides, be provided with the rectangular apertures 31 that a plurality of intervals arrange in its main grid line 30, when print positive electrode, described rectangular apertures 31 has reduced the shading-area of positive electrode on the one hand without the printing conductive slurry, has improved the conversion efficiency of solar battery sheet, significantly reduce on the other hand the use amount of electrocondution slurry, reduced the manufacturing cost of solar battery sheet.
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement; can not limit protection range of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed within the protection range of the present utility model.