CN203481247U

CN203481247U - Solar cell

Info

Publication number: CN203481247U
Application number: CN201320344107.9U
Authority: CN
Inventors: 李青海; 司红磊
Original assignee: Jiangsu FGY Energy Storage Research Institute Co Ltd
Current assignee: Jiangsu FGY Energy Storage Research Institute Co Ltd
Priority date: 2013-06-17
Filing date: 2013-06-17
Publication date: 2014-03-12
Anticipated expiration: 2023-06-17

Abstract

The utility model relates to a solar cell, in particular to a solar cell. A new technological process is adopted, full-aluminum paste printing is adopted on the back face, back electrode printing is reduced, back electrode aluminum paste is saved by 100%, the Voc is improved, and the Isc is raised. The main-grid-free design is adopted on the front face of the solar cell, front face aluminum paste is saved by 50%, and the Isc is raised. Three pieces of 3M conductive adhesive are pasted on the back face of the solar cell to serve as conductive electrodes. Three pieces of 3M conductive adhesive are pasted on the front face of the solar cell to serve as bus and conductive electrodes. Series connection and parallel connection of the solar cells can be achieved through the conductive adhesive. The production process of an assembly of the solar cell and the production process of a general assembly are the same.

Description

A kind of solar cell

Technical field

The utility model relates to solar cell, refers in particular to a kind of solar cell.

Background technology

The traditional energy such as coal, oil signals for help repeatedly, energy problem becomes the bottleneck of restriction economic development day by day, problem, increasing country comes into effect " sunlight program ", exploitation solar energy resources, seek the new power of economic development, solar energy, as a kind of reproducible new forms of energy, more and more causes people's concern; Solar cell is future source of energy predicament as new forms of energy, has opened up a new road.

Solar energy power generating is at present higher than traditional energy cost, and Future New Energy Source substitutes traditional energy, and it is inevitable reducing costs; In solar energy manufacturing cost, silicon material cost accounting is the most about 30% ~ 50%, and along with purification technique upgrades, silicon material price drops always, and silicon material cost accounts for cost ratio 30% left and right substantially now; But not silicon cost accounting rises to 20 ~ 40% by original 10%, and silver is starched cost 80% in the middle of non-silicon cost

~ 95%; And the since two thousand six rising all the way of international silver-colored valency, therefore reducing silver slurry cost is the key issue that new forms of energy replace traditional energy.

Summary of the invention

The utility model object is to reduce silver slurry use amount, improves battery efficiency.

To achieve these goals solar battery sheet is redesigned, remove back electrode and positive electrode-employing without main grid, without back electrode process route; Save positive silver paste 50 ~ 80%, save back silver paste 100%, can be non-silicon cost more than 50%; And can reduce by a back of the body filamentary silver seal printing machine, reduce equipment purchasing and cost of upkeep.

Existing battery production silk-screen printing technique comprises three parts printings first steps printing back electrodes (as Fig. 1), second step printing back of the body electric field (as Fig. 2), the 3rd step print electrode (as Fig. 3); Design a kind of new battery, without first step printing back electrode, directly entirely carry on the back aluminium electric field pattern printing (as Fig. 4), then carry out without main grid positive electrode graphic printing (as Fig. 5); Remove back electrode and can save 100% back electrode silver slurry, increase back of the body field area simultaneously, increase back of the body aluminium area, increase P ⁺⁺layer promotes Voc, reduces photoelectron compound, increases long wave reflection, improves Isc; Battery front side adopts without main grid design, saves front side silver paste 50%, improves efficient light area simultaneously, promotes Isc, and cell backside adopts 3 3M conducting resinls to paste the back side, plays conductive electrode effect.Battery front side adopts 3 3M conducting resinls to stick on front, play conflux, conductive electrode effect; The series and parallel connections of battery can directly connect by conducting resinl, and the assembly production technology of this battery is identical with conventional assembly production technology.

The new design battery efficiency contrast of conventional batteries and various combination

Figure 2013203441079100002DEST_PATH_IMAGE001

Accompanying drawing explanation

Fig. 1 is existing battery back electrode figure; The 1st, back electrode, the 2nd, silicon chip;

Fig. 2 is existing battery back electric field figure; The 1st, back electrode, the 3rd, aluminium back surface field;

Fig. 3 is existing battery positive electrode figure; The 4th, main grid, the 5th, thin grid;

Fig. 4 is that battery is carried on the back aluminium electric field pattern entirely; The 3rd, aluminium back surface field;

Fig. 5 is battery front side dereliction gate electrode figure; The 5th, thin grid.

instantiation mode

Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example, only for explaining the utility model, is not intended to limit scope of the present utility model.

Example one

First step printing back of the body electric field pattern, as Fig. 4, adopts baccini drying oven, at 60 to 250 ℃, dries, and second step printing as Fig. 5, adopts Despatch sintering furnace, sintering metal at 100 to 920 ℃ without main grid positive electrode figure; Adopt 3 3M conducting resinls to stick on respectively cell backside, play electric action; Adopt 3 3M electrically conducting transparent glue to stick on respectively battery front side, rise conflux, electric action, battery is carried out to series and parallel connections connection; Solar components production technology is identical with conventional assembly production technology.

Example two

First step printing back electrode figure is as Fig. 1, adopt baccini drying oven, at 60 to 220 ℃, dry, second step printing back of the body electric field pattern is as Fig. 2, adopt baccini drying oven, at 60 to 250 ℃, dry, second step printing without main grid positive electrode figure as Fig. 5, adopt Despatch sintering furnace, sintering metal at 100 to 920 ℃; Adopt 3 3M electrically conducting transparent glue to stick on respectively battery front side, play and conflux, conduct electricity the effect of confluxing, battery is carried out to series and parallel connections connection.Solar components production technology is identical with conventional assembly production technology.

Example three

First step printing back of the body electric field pattern, as Fig. 4, adopts baccini drying oven, at 60 to 250 ℃, dries, and second step is printed with main grid positive electrode figure as Fig. 3, adopts Despatch sintering furnace, sintering metal at 100 to 920 ℃; Adopt 3 3M electrically conducting transparent glue to stick on respectively cell backside, play electric action, battery is carried out to series and parallel connections connection; Solar components production technology is identical with conventional assembly production technology.

Claims

1. a solar cell, is characterized in that: described cell backside adopts full back of the body aluminium electric field completely, without back electrode, can effectively reduce back electrode printing equipment, saves 100% back electrode silver slurry, promotes Voc, Isc; Battery front side only has thin grid without main grid, carries out without main grid positive electrode graphic printing, saves front side silver paste 50%, promotes Isc; Cell backside adopts 3 3M conducting resinls to paste the back side, plays conductive electrode effect; Battery front side adopts 3 3M conducting resinls to stick on front, play conflux, conductive electrode effect; The series and parallel connections of battery directly connects by conducting resinl.