CN206293446U - Back electrode of solar cell structure - Google Patents
Back electrode of solar cell structure Download PDFInfo
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- CN206293446U CN206293446U CN201621386203.XU CN201621386203U CN206293446U CN 206293446 U CN206293446 U CN 206293446U CN 201621386203 U CN201621386203 U CN 201621386203U CN 206293446 U CN206293446 U CN 206293446U
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Abstract
The utility model discloses a kind of back electrode of solar cell structure, including some groups of grid lines, every group of grid line includes some segmental structures, and some octagon engraved structures are provided with each segmental structure, and electrocondution slurry is not filled with octagon engraved structure；The arrangement mode of the octagon engraved structure in each segmental structure is：Arrangement is sequentially overlapped according to odd-numbered line odd number octagon engraved structure, even number line even number octagon engraved structure, the quantity of the octagon engraved structure of all odd-numbered lines is equal, the quantity of the octagon engraved structure of all even number lines is equal, and the quantity of the octagon engraved structure of even number line is less than the quantity of the octagon engraved structure of odd-numbered line, and the total line number for arranging is odd number.The design can more effectively reduce the usage amount of silver-colored aluminium paste and help to be lifted the drying sintering effect of back electrode so as to form the silver-colored silicon alloy layer with good ohmic contact while back electrode welding pulling force is ensured.
Description
Technical field
The utility model is related to light technical field of solar batteries, and in particular to a kind of back electrode of solar cell structure.
Background technology
Solar energy is more next so that its is inexhaustible, pollution-free, the advantages of do not limited by resource advantage as a kind of green energy resource
More it is valued by people.With continuing to develop for solar cell, industry is also constantly being improved to battery quality, is not only embodied
In terms of battery electrical property, while also having requirement higher to the cost of battery consumption.
In present cell piece manufacturing process, the Main Function of cell piece backplate is electric current conduction, specific manifestation
Be assembly end by tin bar by cell piece series welding after, by circuit turn-on, transmit electric current.So, the weldering of backplate and tin bar
Connect the various aspects of performance that performance direct relation solar cell module.Therefore in present cell piece manufacturing process, for
Backplate, what each company was primarily upon is components welding performance and printing silver paste unit consumption, this 2 direct relation batteries, components
Efficiency and production cost.
The manufacture craft of routine back electrode of solar cell is to use silk-screen printing to starch with special pattern Ag, A l at present
It is printed onto on silicon chip and sinters and forms.Due to being directly printed on P-type silicon surface, silver forms alloy to silver-colored back electrode with silicon after sintering
Layer, forms amorphous amorphous high density structures, while to silver-colored impurity is introduced in silicon, these impurity can be formed in silicon chip surface
A large amount of complex centres, influence battery efficiency.Many companies are studied the material of back electrode of solar cell, but to electrode
Design aspect research is less.
Utility model content
The purpose of this utility model is to provide a kind of back electrode of solar cell structure, to ensure back electrode welding drawing
While power, more effectively reduce the usage amount of silver-colored aluminium paste and contribute to the drying sintering effect for lifting back electrode so as to form tool
The silver-colored silicon alloy layer for having good ohmic to contact, helps to lift crystal silicon battery performance.
To achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of back electrode of solar cell structure, including some groups of grid lines, every group of grid line include some segmental structures, often
Some octagon engraved structures are provided with individual segmental structure, electrocondution slurry is not filled with octagon engraved structure；Its
In, the arrangement mode of the octagon engraved structure in each segmental structure is：According to odd-numbered line odd number octagon hollow out
Structure, even number line even number octagon engraved structure are sequentially overlapped arrangement, the octagon engraved structure of all odd-numbered lines
Quantity is equal, and the quantity of the octagon engraved structure of all even number lines is equal, and the octagon engraved structure of even number line
Quantity is less than the quantity of the octagon engraved structure of odd-numbered line, and the total line number for arranging is odd number.
In one embodiment of the present utility model, the arrangement mode of the octagon engraved structure in each segmental structure
For：Arranged according to five octagon engraved structures of odd-numbered line, four octagon engraved structures of even number line, and the head office for arranging
Number is the five-element.
In one embodiment of the present utility model, the width of each segmental structure is 2-4mm, and length is 20-25mm.
In one embodiment of the present utility model, the quantity of the grid line is four groups.
In one embodiment of the present utility model, the quantity of the segmental structure is three sections.
The utility model is allowed to compared with prior art, have the following advantages that and accumulate due to using above technical scheme
Pole effect：
1) the back electrode of solar cell structure that the utility model is provided, the octagon hollow out knot in each segmental structure
The arrangement mode of structure is：According to odd-numbered line odd number octagon engraved structure, even number line even number octagon engraved structure
Arrangement is sequentially overlapped, the quantity of the octagon engraved structure of all odd-numbered lines is equal, the octagon hollow out of all even number lines
The quantity of structure is equal, and the octagon engraved structure of even number line octagon engraved structure of the quantity less than odd-numbered line
Quantity, and the total line number for arranging is odd number.Relative to the design of other figures, the design can ensure back electrode weldering
While connecing pulling force, more effectively reduce the usage amount of silver-colored aluminium paste and help to be lifted the drying sintering effect of back electrode so as to shape
Into the silver-colored silicon alloy layer contacted with good ohmic.
(2) due to using above-mentioned graphic designs scheme, can effectively optimize the series resistance of cell piece, short circuit current and
Fill factor, curve factor, is favorably improved cell piece conversion efficiency.
(3) due to using above-mentioned graphic designs scheme, in the use problem of non-renewable resources, improve the utilization of silver
Rate, makes bigger economic worth in the case of isodose.
Brief description of the drawings
Fig. 1 is the schematic diagram of conventional back electrode of solar cell structure.
The schematic diagram of the back electrode of solar cell structure that Fig. 2 is provided for the utility model embodiment.
Label declaration：
100th, 200- grid lines, 101,210- segmental structures, 211- octagon engraved structures
Specific embodiment
Below in conjunction with the drawings and specific embodiments to the utility model proposes back electrode of solar cell structure make into one
Step is described in detail.According to following explanation and claims, advantages and features of the present utility model will become apparent from.Should be noted
It is that accompanying drawing in the form of simplifying very much and uses non-accurately ratio, is only used for convenience, lucidly aids in illustrating this reality
With the purpose of new embodiment.
Fig. 1 is refer to, Fig. 1 is the schematic diagram of conventional back electrode of solar cell structure, as shown in figure 1, routine is too
Positive energy battery back electrode structure includes four groups of grid lines 100, and every group of grid line 100 includes three sections of segmental structures 101.
Refer to Fig. 2, the schematic diagram of the back electrode of solar cell structure that Fig. 2 is provided for the utility model embodiment, such as
Shown in Fig. 2, the back electrode of solar cell structure that the utility model embodiment is provided includes some groups of grid lines 200, every group of grid line
200 include being provided with some octagon engraved structures 211 in some segmental structures 210, each segmental structure 210, just
Electrocondution slurry is not filled with octagon engraved structure 211；Wherein, the octagon engraved structure 211 in each segmental structure 210
Arrangement mode be：According to odd-numbered line odd number octagon engraved structure 211, even number line even number octagon engraved structure
211 are sequentially overlapped arrangement, and the quantity of the octagon engraved structure 211 of all odd-numbered lines is equal, positive eight side of the even number line
The quantity of shape engraved structure 211 is equal, and the octagon engraved structure 211 of even number line quantity less than odd-numbered line positive eight side
The quantity of shape engraved structure 211, and the total line number for arranging is odd number.
Wherein, in one embodiment of the present utility model, the octagon engraved structure in each segmental structure 210
211 arrangement mode is：According to five octagon engraved structures 211 of odd-numbered line, four octagon engraved structures of even number line
211 arrangements, and total line number of arrangement is the five-element.It will, of course, be appreciated that the utility model is not limited thereto, other are specific
Ground arrangement mode also within protection domain of the present utility model, for example, seven octagon engraved structures 211 of odd-numbered line, even
Six octagon engraved structures 211 of several rows are arranged, and arrangement total line number for seven rows also can, only need to meet odd-numbered line odd number
Octagon engraved structure, even number line even number octagon engraved structure are sequentially overlapped arrangement, positive eight side of all odd-numbered lines
The quantity of shape engraved structure is equal, and the quantity of the octagon engraved structure of all even number lines is equal, and even number line positive eight side
The quantity of shape engraved structure is less than the quantity of the octagon engraved structure of odd-numbered line, and the total line number for arranging for odd number is
Can.
Wherein, the width of each segmental structure 210 is 2-4mm, and length is 20-25mm.
In one embodiment of the present utility model, the quantity of grid line 200 is four groups.Certainly, the utility model not with
This is limited, and the grid line of other quantity is also within protection domain of the present utility model.
In one embodiment of the present utility model, the quantity of segmental structure 210 is three sections.Certainly, the utility model is simultaneously
It is not limited, the segmental structure of other quantity is also within protection domain of the present utility model.
The back electrode of solar cell structure that the utility model is provided, the octagon hollow out knot in each of which segmental structure
The arrangement mode of structure is：According to odd-numbered line odd number octagon engraved structure, even number line even number octagon engraved structure
Arrangement is sequentially overlapped, the quantity of the octagon engraved structure of all odd-numbered lines is equal, the octagon hollow out of all even number lines
The quantity of structure is equal, and the octagon engraved structure of even number line octagon engraved structure of the quantity less than odd-numbered line
Quantity, and the total line number for arranging is odd number.Relative to the design of other figures, the design can ensure back electrode weldering
While connecing pulling force, more effectively reduce the usage amount of silver-colored aluminium paste and help to be lifted the drying sintering effect of back electrode so as to shape
Into the silver-colored silicon alloy layer contacted with good ohmic.
Also, due to using above-mentioned graphic designs scheme, can effectively optimize series resistance, the short circuit current of cell piece
And fill factor, curve factor, it is favorably improved cell piece conversion efficiency.
Further, since using above-mentioned graphic designs scheme, in the use problem of non-renewable resources, improve the profit of silver
With rate, bigger economic worth is made in the case of isodose.
Obviously, those skilled in the art can carry out various changes to utility model and modification is new without deviating from this practicality
The spirit and scope of type.So, if it is of the present utility model these modification and modification belong to the utility model claim and its
Within the scope of equivalent technologies, then the utility model is also intended to comprising these changes and modification.
Claims (5)
1. a kind of back electrode of solar cell structure, it is characterised in that including some groups of grid lines, every group of grid line includes some points
Segment structure, is provided with some octagon engraved structures in each segmental structure, be not filled with leading in octagon engraved structure
Plasma-based material；Wherein, the arrangement mode of the octagon engraved structure in each segmental structure is：According to odd-numbered line odd number positive eight
Side shape engraved structure, even number line even number octagon engraved structure are sequentially overlapped arrangement, and the octagon of all odd-numbered lines is engraved
The quantity of hollow structure is equal, and the quantity of the octagon engraved structure of all even number lines is equal, and the octagon of even number line is engraved
The quantity of hollow structure is less than the quantity of the octagon engraved structure of odd-numbered line, and the total line number for arranging is odd number.
2. back electrode of solar cell structure as claimed in claim 1, it is characterised in that positive eight side in each segmental structure
The arrangement mode of shape engraved structure is：According to five octagon engraved structures of odd-numbered line, four octagon hollow outs of even number line
Structural arrangement, and total line number of arrangement is the five-element.
3. back electrode of solar cell structure as claimed in claim 1, it is characterised in that the width of each segmental structure is 2-
4mm, length is 20-25mm.
4. back electrode of solar cell structure as claimed in claim 1, it is characterised in that the quantity of the grid line is four groups.
5. back electrode of solar cell structure as claimed in claim 4, it is characterised in that the quantity of the segmental structure is three
Section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621386203.XU CN206293446U (en) | 2016-12-16 | 2016-12-16 | Back electrode of solar cell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621386203.XU CN206293446U (en) | 2016-12-16 | 2016-12-16 | Back electrode of solar cell structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206293446U true CN206293446U (en) | 2017-06-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621386203.XU Active CN206293446U (en) | 2016-12-16 | 2016-12-16 | Back electrode of solar cell structure |
Country Status (1)
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| CN (1) | CN206293446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019233055A1 (en) * | 2018-06-07 | 2019-12-12 | 通威太阳能（安徽）有限公司 | Aluminum back surface field structure for improving conversion efficiency of p-type single crystal double-sided solar cell |
-
2016
- 2016-12-16 CN CN201621386203.XU patent/CN206293446U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019233055A1 (en) * | 2018-06-07 | 2019-12-12 | 通威太阳能（安徽）有限公司 | Aluminum back surface field structure for improving conversion efficiency of p-type single crystal double-sided solar cell |
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