CN203250750U - Solar cell with sectional main grid lines - Google Patents
Solar cell with sectional main grid lines Download PDFInfo
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- CN203250750U CN203250750U CN2013201315457U CN201320131545U CN203250750U CN 203250750 U CN203250750 U CN 203250750U CN 2013201315457 U CN2013201315457 U CN 2013201315457U CN 201320131545 U CN201320131545 U CN 201320131545U CN 203250750 U CN203250750 U CN 203250750U
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Abstract
The utility model relates to a solar cell with sectional main grid lines, belonging to the technical field of solar cells. The solar cell comprises a frontal electrode. The frontal electrode includes thin grid lines and main grid lines arranged on the thin grid lines. The main grid lines include B main grid lines and A main grid lines. The B main grid lines and the A main grid lines are alternatively arranged and are both communicated with the thin grid lines. The effective width of the A main grid line is smaller than that of the B main grid line. According to the solar cell provided by the utility model, the cost can be reduced by the reduction in slurry consumption, and the conversion efficiency of solar energy is ensured.
Description
Technical field
The utility model relates to a kind of main grid segmented solar cell, belongs to technical field of solar batteries.
Background technology
At present, along with the not section development of photovoltaic industry, having higher requirement to the photovoltaic product in market, not only will pursue higher conversion efficiency, and the manufacturing cost of cell piece has also been proposed requirements at the higher level.At present, the main screen printing technique that adopts of the electrode preparation of cell piece, be conductivity and the solderability of raising electrode, the electrocondution slurry of noble silver preparation is adopted in the electrode preparation, and this removes the in addition main part of cell piece preparation cost of silicon chip cost so that the electrode preparation becomes.As shown in Figure 1, H shape figure is the main figure of present front electrode figure, and wherein thin grid line plays collected current, and the electric current of collection is aggregated on the main grid line, and the main grid line also plays the effect that is welded into assembly except the electric current that compiles thin grid line collection.Power loss when reducing the main grid collected current, the quantity that increases the main grid line is present main direction, but can increase silver slurry consumption when increasing main grid line quantity.In addition, the power loss that causes for reducing shading-area and reduction grid line resistance, thin grid line needs high depth-width ratio, and this also is screen printing technique emphasis research direction.And main grid line height also will improve when improving thin grid line, and the excessive raising of main grid line height can not bring corresponding benefit to current delivery, can bring simultaneously flexural deformation behind the cell piece sintering, the electrode increase of hidden danger and cost of sizing agent such as come off when welding.
For overcoming the above problems, existing patented technology as shown in Figure 2, changes two main grids into three main grids at present, can significantly promote the conversion efficiency of solar cell.In addition, by front electrode main grid line printing zone manufactured size 50 μ m-1mm such as triangle, circular close-shaped latex film carries out local the seeing through of electrocondution slurry of blocking to main grid line zone, thereby reduce the electrocondution slurry consumption to reduce cost, adopted diameter at 200 μ m such as them, the point of contact spacing has reached good slurry reduction effect at the circular pattern array of 100 μ m.But its equal defectiveness: adopt three main grid positive electrode structures to compare with two main grid positive electrode structures, will significantly increase silver slurry consumption; Adopt the local method of covering front electrode main grid line not change the width of main grid line own and length, it is limited that slurry reduces degree.
The utility model content
The utility model proposes a kind of main grid segmented solar cell for the deficiency of the problems referred to above, and this main grid segmented solar cell not only can pass through to reduce the slurry consumption with the reduction cost, and can guarantee the conversion efficiency of solar energy.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of main grid segmented solar cell, comprise front electrode, this front electrode comprises thin grid line and is arranged on main grid line on the thin grid line, described main grid line comprises B main grid line and A main grid line, described B main grid line and A main grid line interval arrange, and described A main grid line, B main grid line all are communicated with grid line carefully; The effective width of described A main grid line is less than the width of B main grid line simultaneously.
Preferably: the Length Ratio of described B main grid line and A main grid line is between 1:1 to 1:3; Described A main grid line comprises that the A more than divides grid line, and described A divides the effective width of grid line between 20 μ m to 1000 μ m.
Preferably: described main grid line is the main grid line with sharp grid, is connected by A main grid line between described sharp grid and the B main grid line.
Preferably: described main grid line is the main grid line with flat grate, and the outside of described B main grid line also is provided with A main grid line.
Preferably: described A main grid line divides grid line to form by an A, the center of described A main grid line, B main grid line all point-blank, it is that an A divides grid line that described A divides grid line, a described A divides the live width of grid line between 200 μ m to 1000 μ m.
Preferably: described A main grid line divides grid line to form by two A that are parallel to each other, the center of described A main grid line, B main grid line all point-blank, it is that the 2nd A divides grid line that described A divides grid line, described the 2nd A divides the live width of grid line between 100 μ m to 500 μ m.
Preferably: described two article of the 2nd A divides the spacing between the relative lateral surface of grid line to equate with the width of B main grid line.
A kind of main grid segmented solar cell of the present utility model, compared to existing technology, has following beneficial effect: because by every front electrode main grid line is changed into the B main grid line of a plurality of segmentations by a through type grid line, connect to guarantee that by A main grid line the electric current between the main grid line is communicated with between B main grid line, thereby reduce the slurry consumption to reduce cost, and can guarantee current delivery, can guarantee the conversion efficiency of solar energy, segmented B main grid line structure also has the advantage of fragment being cut arbitrarily recycling simultaneously.Also can reduce in addition flexural deformation and main grid line dropping situations that main grid line sintering causes.
Description of drawings
Fig. 1 is the schematic diagram of existing through type two main grid positive electrode structures;
Fig. 2 is the schematic diagram of existing through type three main grid positive electrode structures;
Fig. 3 is the structural representation of the utility model embodiment 1;
Fig. 4 is the structural representation of the utility model embodiment 4;
Fig. 5 is the structural representation of the utility model embodiment 2;
Fig. 6 is the structure enlarged diagram of the local A of Fig. 3;
Fig. 7 is the structural representation of the utility model embodiment 3;
Fig. 8 is the structure enlarged diagram of the local B of Fig. 4;
Wherein: 1 is the cell piece main body, and 2 is the main grid line, and 3 is thin grid line, and 4 is B main grid line, and 5 is A main grid line, and 6 is sharp grid, and 7 is that an A divides grid line, and 8 is that the 2nd A divides grid line.
Embodiment
Accompanying drawing discloses the structural representation of a preferred embodiment of the utility model without limitation, explains the technical solution of the utility model below with reference to accompanying drawing.
A kind of main grid segmented solar cell of present embodiment, as shown in Figure 3, comprise front electrode, this main grid segmented front electrode of solar battery is 156 * 156 monocrystalline or polycrystalline cell piece 3 main grids 8 segmentation electrode structure at right sides, this front electrode comprises three main grid lines that are arranged on the thin grid line, and described main grid line comprises B main grid line and A main grid line, and described B main grid line and A main grid line interval arrange, and described A main grid line, B main grid line all are communicated with thin grid line, to avoid this regional current loss; Simultaneously the width of described A main grid line less than B main grid line width.Described B main grid line can be by pressing original through type three main grids certain rule, the little main grid line that is divided into the 2-100 section such as even or symmetric mode, this little main grid line is B main grid line, A main grid line by 20 μ m-1mm width between the B main grid line connects to guarantee the current lead-through between the segmented main grid line
The Length Ratio of described B main grid line and A main grid line is between 1:1 to 1:3; Described A main grid line comprises that the A more than divides grid line, and described A divides the width of grid line between 20 μ m to 1000 μ m.
Such as Fig. 3, shown in Figure 6
,Described main grid line is the main grid line with sharp grid, be connected by A main grid line between described sharp grid and the B main grid line, described A main grid line divides grid line to form by two A that are parallel to each other, it is that the 2nd A divides grid line that described A divides grid line, the center of described A main grid line, B main grid line all point-blank, spacing between the relative lateral surface of described two the second grid lines equates with the width of B main grid line, described the 2nd A divides the live width of grid line between 100 μ m to 500 μ m, and this positive electrode structure is called the twin wire with sharp grid.
The difference of present embodiment and embodiment 1 is: as shown in Figure 5, described A main grid line divides grid line to form by an A, it is that an A divides grid line that described A divides grid line, the center of described A main grid line, B main grid line all point-blank, a described A divides the live width of grid line between 200 μ m to 1000 μ m, and this positive electrode structure is called the bamboo joint type with sharp grid.
Present embodiment and embodiment 1,2 difference are: as shown in Figure 7, described main grid line is the main grid line with flat grate, described main grid line with flat grate refers to the main grid line without sharp grid, the outside of described B main grid line connects A main grid line, described A main grid line divides grid line to form by an A, it is that an A divides grid line that described A divides grid line, the center of described A main grid line, B main grid line all point-blank, a described A divides the live width of grid line between 200 μ m to 1000 μ m; This positive electrode structure is called the bamboo joint type without sharp grid.
The difference of present embodiment and embodiment 1-3 is: shown in Fig. 4,8, described main grid line is the main grid line with flat grate, and described main grid line with flat grate refers to the main grid line without sharp grid, and the outside of described B main grid line connects A main grid line.Described A main grid line divides grid line to form by two A that are parallel to each other, it is that the 2nd A divides grid line that described A divides grid line, the center of described A main grid line, B main grid line all point-blank, the width of described two the second grid lines equates with the width of B main grid line simultaneously, described the 2nd A divides the live width of grid line between 100 μ m to 500 μ m, and this positive electrode structure is called the twin wire without sharp grid.
As shown in Figure 4: without the segmented main grid structure of sharp grid than with sharp grid segmented main grid structure saving silver paste consumption more.
Principle of the present utility model: by every front electrode main grid line is changed into the B main grid line of a plurality of segmentations by a through type grid line, A main grid line by different in width between B main grid line connects to guarantee that the electric current between B main grid line is communicated with, thereby reduces the slurry consumption to reduce cost.
From the above, adopt segmented main grid line can effectively lower main grid line slurry consumption, thereby reduce cost.As adopt figure in this programme, and every cell piece can reduce 0.04g slurry consumption, calculates by existing slurry price 10,000/kg, and every cell piece will be saved 0.4 yuan.Segmented main grid line structure also has the advantage of fragment being cut arbitrarily recycling.Also can reduce in addition flexural deformation and main grid line dropping situations that main grid line sintering causes.
The above by reference to the accompanying drawings preferred specific embodiment of described the utility model only is used for illustrating execution mode of the present utility model; rather than as the restriction to aforementioned utility model purpose and claims content and scope; such as; change B main grid line and A main grid line length ratio or number of fragments; each B main grid line or A main grid line section length can equate also can be unequal; and for example change A line quantity or width; connected by 4-10 root A main grid line between the B main grid line, it is that 20 μ m-100 μ m etc. are within the protection range of the present utility model that A divides the grid line live width.Any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment all still belong to the utility model technology and rights protection category.
Claims (7)
1. main grid segmented solar cell, comprise front electrode, this front electrode comprises thin grid line and is arranged on main grid line on the thin grid line, it is characterized in that: described main grid line comprises B main grid line and A main grid line, described B main grid line and A main grid line interval arrange, and described A main grid line, B main grid line all are communicated with grid line carefully; The effective width of described A main grid line is less than the width of B main grid line simultaneously.
2. described main grid segmented solar cell according to claim 1, it is characterized in that: the Length Ratio of described B main grid line and A main grid line is between 1:1 to 1:3; Described A main grid line comprises that the A more than divides grid line, and described A divides the effective width of grid line between 20 μ m to 1000 μ m.
3. described main grid segmented solar cell according to claim 2, it is characterized in that: described main grid line is the main grid line with sharp grid, is connected by A main grid line between described sharp grid and the B main grid line.
4. described main grid segmented solar cell according to claim 2, it is characterized in that: described main grid line is the main grid line with flat grate, and the outside of described B main grid line also is provided with A main grid line.
5. according to claim 1,2,3 or 4 described main grid segmented solar cells, it is characterized in that: described A main grid line divides grid line to form by an A, the center of described A main grid line, B main grid line all point-blank, it is that an A divides grid line that described A divides grid line, and a described A divides the live width of grid line between 200 μ m to 1000 μ m.
6. according to claim 1,2,3 or 4 described main grid segmented solar cells, it is characterized in that: described A main grid line divides grid line to form by two A that are parallel to each other, the center of described A main grid line, B main grid line all point-blank, it is that the 2nd A divides grid line that described A divides grid line, and described the 2nd A divides the live width of grid line between 100 μ m to 500 μ m.
7. described main grid segmented solar cell according to claim 6, it is characterized in that: described two article of the 2nd A divides the spacing between the relative lateral surface of grid line to equate with the width of B main grid line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201315457U CN203250750U (en) | 2013-03-22 | 2013-03-22 | Solar cell with sectional main grid lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201315457U CN203250750U (en) | 2013-03-22 | 2013-03-22 | Solar cell with sectional main grid lines |
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| Publication Number | Publication Date |
|---|---|
| CN203250750U true CN203250750U (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013201315457U Expired - Fee Related CN203250750U (en) | 2013-03-22 | 2013-03-22 | Solar cell with sectional main grid lines |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219400A (en) * | 2013-03-22 | 2013-07-24 | 江苏荣马新能源有限公司 | Main-grid sectional type solar battery |
| CN109119497A (en) * | 2018-08-29 | 2019-01-01 | 晶澳（扬州）太阳能科技有限公司 | A kind of silicon-based solar cell structure |
-
2013
- 2013-03-22 CN CN2013201315457U patent/CN203250750U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219400A (en) * | 2013-03-22 | 2013-07-24 | 江苏荣马新能源有限公司 | Main-grid sectional type solar battery |
| CN109119497A (en) * | 2018-08-29 | 2019-01-01 | 晶澳（扬州）太阳能科技有限公司 | A kind of silicon-based solar cell structure |
| CN109119497B (en) * | 2018-08-29 | 2024-04-05 | 晶澳（扬州）太阳能科技有限公司 | Silicon-based solar cell structure |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 |
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| CF01 | Termination of patent right due to non-payment of annual fee |