CN201853714U

CN201853714U - Crystalline silicon solar battery slice with special electrode

Info

Publication number: CN201853714U
Application number: CN 201020516152
Authority: CN
Inventors: 瞿辉; 童彩霞
Original assignee: Jiangsu Shunfeng Photovoltaic Technology Co Ltd
Current assignee: Jiangsu Shunfeng Photovoltaic Technology Co Ltd
Priority date: 2010-09-01
Filing date: 2010-09-01
Publication date: 2011-06-01
Anticipated expiration: 2020-09-01

Abstract

The utility model relates to a crystalline silicon solar battery slice with a special electrode, which comprises a main grid line and an auxiliary grid line, wherein the two ends are wider than the middle part of the main grid line. At the same time as the conversion efficiency is basically kept unchanged, the breaking and cracking rate of the battery slice during manufacturing can be lowered; moreover, the raw material cost and the running cost for production are recessively reduced.

Description

Solar energy crystal silicon battery sheet with special electrode

Technical field

The utility model relates to a kind of solar cell, the project organization of especially a kind of solar cell crystal silicon conductive wafer type and making assembly effect.

Background technology

And pressure environmental protection in short supply day by day along with the energy impels each state all to start exploitation, utilizes the upsurge of solar energy and regenerative resource, development and utilization solar energy has become the important component part of various countries' strategy of sustainable development, over nearly 30 years, solar-photovoltaic technology is all being obtained considerable progress aspect research and development, industrialization, the market development, become the world fast, one of the new industry of stable development.Information technology and solar energy industry develop rapidly at present, the whole world is swift and violent to the demand growth of solar power silicon crystal silicon sheet, and supply falls short of demand in market.In recent years, the global solar battery production increases fast, direct pull the rapid growth of solar power silicon crystal silicon sheet demand.Global solar silicon wafer silicon chip turns to by drug on the market that supply falls short of demand.The supply of material of China's solar power silicon crystal silicon sheet exists serious breach, adds rising suddenly and sharply of price, has injured the development of solar power silicon crystal silicon sheet downstream numerous enterprises, becomes the bottleneck problem of restriction China's IT industry and photovoltaic industry development.

The design that the electrode of solar battery sheet in the market has main electrode two ends uniformity or two ends to come to a point, though design principle and structure be conformance with standard regulation all, have following shortcoming when making the battery sheet and making assembly: (1) though the battery sheet outward appearance of main electrode two ends uniformity with make assembly appearance looks elegant battery sheet edge electrical property loss but arranged; (2), because two ends come to a point, easily cause fragment, unfilled corner, the recessive cost of raw material, the production run cost of increasing though the battery sheet that two ends come to a point can be saved slurry to a certain extent; (3) come to a point place silver and silicon interface place stress surface is too little, stress concentrated of battery plate electrode two ends can cause at the interface during welding, can't bear the welding dynamics and causes fragment, unfilled corner.

The utility model content

The technical problems to be solved in the utility model is: provide a kind of making simple, welding performance height, and the not solar energy crystal silicon battery sheet design of easy damaged battery sheet itself.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of solar energy crystal silicon battery sheet with special electrode, comprise main grid line and sub-grid line, and the two ends of described main grid line are widened than the mid portion of main grid line.When guaranteeing that conversion efficiency is constant substantially, broken when reducing the battery sheet and making, the probability that splits, the recessive operating cost that reduces the cost of raw material, production.In addition, when using this special electrode designed solar cell sheet to make assembly, increased the stress surface of silver, reduced that assembly splits, broken probability, made component power obtain best guarantee with the silicon intersection.

The stability that can increase manual welding is widened at two of main grid line,, reduced short circuit current, also can reduce series resistance simultaneously, improved fill factor, curve factor, therefore can reach a balance, guarantee that conversion efficiency is constant substantially though increased the shading area.

The beneficial effects of the utility model are, have solved the defective that exists in the background technology, utilize two to widen electrode, have reduced and have made the probability that battery sheet itself is broken, split; Promoted assembly welding process decline electric iron, received the welding stability of electric iron position, also reduced generation rate broken when assembly welds, that split simultaneously, recessiveness has reduced the cost of raw material.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the prior art constructions schematic diagram;

Fig. 2 is the another kind of structural representation of prior art;

Fig. 3 is a structural representation of the present utility model;

Among the figure: 1, main grid line; 2, sub-grid line.

Embodiment

With preferred embodiment the utility model is described in further detail in conjunction with the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.

As shown in Figure 1, 2 be the prior art constructions schematic diagram, wherein shown in Figure 1 is the structure that main grid line two ends come to a point, and shown in Figure 2 be the constant structures in main grid line two ends.

A kind of solar energy crystal silicon battery sheet with special electrode shown in Figure 3 comprises main grid line 1 and sub-grid line 2, and the two ends of described main grid line 1 are widened than the mid portion of main grid line 1.When guaranteeing that conversion efficiency is constant substantially, broken when reducing the battery sheet and making, the probability that splits, the recessive operating cost that reduces the cost of raw material, production.In addition, when using this special electrode designed solar cell sheet to make assembly, increased the stress surface of silver, reduced that assembly splits, broken probability, made component power obtain best guarantee with the silicon intersection.

Also suitable simple of actual mechanical process of the present utility model, identical with original battery blade technolgy, just when silk screen printing, adopt the half tone of novel electrode design, the adjustment member parameter makes printed pattern can reach optimum efficiency.

What describe in the above specification is embodiment of the present utility model, various not illustrating is construed as limiting flesh and blood of the present utility model, the person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from the essence and the scope of utility model.

Claims

1. the solar energy crystal silicon battery sheet with special electrode comprises main grid line (1) and sub-grid line (2), and it is characterized in that: the two ends of described main grid line (1) are widened than the mid portion of main grid line (1).