CN208580750U - A kind of solar cell back electrode structure - Google Patents
A kind of solar cell back electrode structure Download PDFInfo
- Publication number
- CN208580750U CN208580750U CN201820612679.3U CN201820612679U CN208580750U CN 208580750 U CN208580750 U CN 208580750U CN 201820612679 U CN201820612679 U CN 201820612679U CN 208580750 U CN208580750 U CN 208580750U
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- back electrode
- solar cell
- main body
- sides
- electrode main
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Abstract
It include positioned at one or more snippets back electrode main body of rear surface of solar cell, the both sides of the edge of the back electrode main body are equipped with multiple to two sides protrusion outstanding the utility model discloses a kind of solar cell back electrode structure.The utility model is on the basis of back electrode main body, it is arranged in back electrode main body both sides of the edge multiple to two sides arc-shaped protrusions part outstanding, particular in the printing process of back electric field, due to when the part of printing tension changes, and lower knife-edge side is caused arc back electric field structure occur, the protrusion and back electric field pattern of the design can guarantee good overlap joint, series resistance when reducing cell piece electric current collection, improves the photoelectric conversion efficiency of cell piece, improves the power loss of component.
Description
Technical field
The utility model relates to a kind of solar cell back electrode structures.
Background technique
Solar energy is a kind of inexhaustible clean energy resource, and solar battery technology is the important of solution world energy sources crisis
One of means and technology.Crystal silicon solar batteries dominate global solar battery market at present, occupy 80% or more
The market share.The structure of crystal silicon battery is front electrode, anti-reflection layer, n-layer, p-type layer, metal back electrode；Wherein front electrode
For conductive silver paste, anti-reflection layer SiN, n-layer is the n-type silicon of phosphorus doping, and p-type layer is boron doped p-type silicon, and metal back electrode is
Conducting aluminum paste and conductive silver paste.In solar battery preparation, the method for making its electrode of silk-screen printing is because of its high efficiency, low cost
Characteristic becomes the Fabrication Technology of Electrode method of current industry mainstream.The alloy-layer of back electrode and silicon wafer has a large amount of few son multiple
Conjunction center, the lesser back electrode of area can effectively improve the output characteristics of battery, if but back electrode and back electric field take
The bad fill factor and incident photon-to-electron conversion efficiency that can reduce battery is connect, component power loss is influenced.Therefore back electrode and back electric field
Good contact be is stablized, one of the key technology of Efficient devices, design suitable back electrode and carry on the back electric field structure, enhance
The collection and transmittability in hole, can obtain efficient solar cell device.
In the printing process for carrying on the back electric field when silk-screen printing at present, lead to lower knife-edge side since the part of printing tension changes
Easily there is arc back electric field structure (as shown in Figure 2), leads to lower knife-edge side back electrode and back electric field dew silicon, it is bad overlap joint occur
The phenomenon that.
Utility model content
The utility model one of to solve the above-mentioned problems, provides and a kind of realizes back electricity in rear surface of solar cell printing
The reliable overlap joint of pole and back electric field, the back electrode of solar cell structure for improving component power loss.
In order to achieve the above object, the technical scheme adopted by the utility model is that:
A kind of solar cell back electrode structure, include positioned at one or more snippets back electrode main body of rear surface of solar cell,
The both sides of the edge of the back electrode main body are equipped with multiple to two sides protrusion outstanding.
Further, the back electrode main body is in rectangle, and back electrode body width is greater than welding width.
Further, the protrusion is square, and the side central point of the protrusion far from back electrode main body is at one
On camber line, whole arc-shaped gradual design is entire in minor arc shape (being known as minor arc less than the arc of semicircle).
Further, protrusion middle position width on the length direction of back electrode main body is big, and both sides position is wide
It spends small.
The beneficial effects of the utility model are:
The utility model is arranged multiple prominent to two sides on the basis of back electrode main body in back electrode main body both sides of the edge
Arc-shaped protrusions part, particular for back electric field printing process in, due to printing tension part change lead to lower knife-edge one
When arc back electric field structure occurs in side, the protrusion and back electric field pattern of the design can guarantee good overlap joint, reduce electricity
Series resistance when the piece electric current collection of pond, improves the photoelectric conversion efficiency of cell piece, improves the power loss of component.
Detailed description of the invention
Fig. 1 is the back electrode of solar cell structure of the utility model；
Fig. 2 is that the arc generated in original structure normal printing process carries on the back electric field structure schematic diagram；
It is as shown in the figure: 1-back electrode main body, 2-protrusions.
Specific embodiment
The utility model is illustrated with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of solar cell back electrode structure, includes positioned at one or more snippets back of rear surface of solar cell
Electrode body 1 and 1 both sides of the edge of back electrode main body are multiple to two sides protrusion 2 outstanding, and back electrode main body 1 is in rectangle, back
1 width of electrode body is greater than welding width.The side central point of protrusion 2 far from back electrode main body 1 is whole on a camber line
The arc-shaped gradual design of body, this arc are minor arc shape, i.e., are known as minor arc less than the arc of semicircle, the protrusion 2 is square
Structure, the square side length in middle position on the length direction of back electrode main body 1 of protrusion 2 is big, and end positions side length is small.
It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model
Member can carry out various changes and amendments in the range of without departing from this item utility model technical idea completely.This item is real
It is not limited to the contents of the specification with novel technical scope, it is necessary to its technology is determined according to scope of the claims
Property range.
Claims (5)
1. a kind of solar cell back electrode structure, it is characterised in that: it include positioned at one or more snippets back of rear surface of solar cell
Electrode body, the both sides of the edge of the back electrode main body are equipped with multiple to two sides protrusion outstanding.
2. a kind of solar cell back electrode structure according to claim 1, it is characterised in that: the back electrode main body is in square
Shape, back electrode body width are greater than welding width.
3. a kind of solar cell back electrode structure according to claim 1, it is characterised in that: the protrusion is in pros
Shape, the side central point of the protrusion far from back electrode main body is on a camber line, whole arc-shaped gradual design.
4. a kind of solar cell back electrode structure according to claim 1 or 3, it is characterised in that: the protrusion exists
Middle position width is big on the length direction of back electrode main body, and both sides position width is small.
5. a kind of solar cell back electrode structure according to claim 3, it is characterised in that: the arc is in minor arc shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612679.3U CN208580750U (en) | 2018-04-27 | 2018-04-27 | A kind of solar cell back electrode structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612679.3U CN208580750U (en) | 2018-04-27 | 2018-04-27 | A kind of solar cell back electrode structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208580750U true CN208580750U (en) | 2019-03-05 |
Family
ID=65505896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820612679.3U Expired - Fee Related CN208580750U (en) | 2018-04-27 | 2018-04-27 | A kind of solar cell back electrode structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208580750U (en) |
-
2018
- 2018-04-27 CN CN201820612679.3U patent/CN208580750U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190305 Termination date: 20210427 |