CN203085563U - A crystal silicon MWT solar-energy battery - Google Patents
A crystal silicon MWT solar-energy battery Download PDFInfo
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- CN203085563U CN203085563U CN 201320018921 CN201320018921U CN203085563U CN 203085563 U CN203085563 U CN 203085563U CN 201320018921 CN201320018921 CN 201320018921 CN 201320018921 U CN201320018921 U CN 201320018921U CN 203085563 U CN203085563 U CN 203085563U
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Abstract
The utility model discloses a crystal silicon MWT solar-energy battery comprising battery front conductive grid lines, conductive through holes, back positive electrode grid lines, and back negative electrode grid lines. Light is irradiated on the front surface of the solar-energy battery. And thus generated charge carriers are accumulated on the front of the solar-energy battery while charge carriers with opposite types are accumulated on the back of the solar-energy battery. The front conductive grid lines are connected with the back negative electrode grid lines through the multiple conductive through holes. One end of each negative electrode grid line is equipped with a feeler grid line which is arranged in a same straight line with the back positive electrode grid line in the interconnection direction. The back positive electrode grid lines use discontinuous or continuous linear design and are in parallel with back negative electrode grid lines. The interconnection of battery sheets is achieved on the backs of the battery sheets. By using a conventional soldering technology, the back positive electrode or the back negative electrode of the battery sheet is soldered on the back negative electrode or the back positive electrode of the battery sheet in a serial manner. Therefore, high compatibility with a conventional assembly technology is achieved.
Description
Technical field
The utility model relates to field of solar thermal power generation, particularly a kind of crystal silicon MWT solar cell
Background technology
In the face of more and more serious global energy crisis and weather environmental issue, become inevitable choice as the crystal silicon solar photovoltaic generation of clean energy resource.Most important parameter is a conversion efficiency for solar cell, the scheme that improves solar battery efficiency is a lot, and at present mainly by following several classes: back side emitter structure (as the IBC battery), emitter region break-through battery (EWT battery), some contact battery (PCC battery), metal piercing twine (MWT) or becket around battery (MWA) etc.; Wherein relatively simple with MWT solar cell making flow process, making flow process with respect to the conventional crystal silicon solar cell has only increased extra laser drilling and hole insulation twice processing step, but component technology requires high, need be to accurately aiming between back side opposing electrode point and the metal forming, technical difficulty is big, and realization means complexity can't be carried out by hand, so cost is very high, becomes an important technology difficult point that limits its development.
The utility model content
The technical problems to be solved in the utility model is to realize interconnection and traditional solar components welding procedure compatibility of the electrode of crystal silicon MWT solar cell, reduce MWT battery component packaging cost, quicken the industrialization of MWT battery, a kind of crystal silicon MWT solar cell is provided.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of crystal silicon MWT solar cell, comprise battery front side conduction grid line, conductive through hole, back side positive electrode grid line, back side negative electrode grid line, positive conduction grid line is connected to back side negative electrode grid line by the conductive through hole of solar cell, one end of back side negative electrode grid line is printed with bending feeler grid line, and the feeler grid line is positioned on the straight line with back side positive electrode grid line on the interconnection direction.
Described back side positive electrode grid line is for to be arranged in parallel with back side negative electrode grid line.The sectional drawing of described conductive through hole is shaped as cylindrical or truncated cone-shaped, equidistantly is arranged in the front surface of battery on single direction, and spread pattern is a kind of in 3 * 3,3 * 4,3 * 5,3 * 6,4 * 4,4 * 5,4 * 6.
The pattern of positive conduction grid line is made of several same sub pattern, and the border of sub pattern links to each other the formation closed pattern with adjacent sub pattern border.Described sub pattern comprises the frame grid line that surrounds all grid lines, the conductive through hole that is positioned at the center of sub pattern, backbone, second layer branch line and the 3rd layer of branch line, second layer branch line is flowed to backbone with many articles of the 3rd layer of branch line, and backbone is flowed to conductive through hole with many second layer branch lines.
Preferably, described positive electrode grid line is symmetrically distributed along battery sheet center line.
Preferably, described feeler grid line is to the bending of positive electrode grid line direction right angle, and the outside right angle of property positive electrode direction along the line again bends, and bending length is 2-20mm.
Preferably, be provided with isolation channel around the negative electrode grid line of the described back side, described isolation channel is 0.1-4mm apart from the close Edge Distance of negative electrode grid line, and groove width is 0.1-3mm.
Preferably, the width of described positive conduction grid line is 30-90 μ m, the outermost frame of grid line is apart from battery sheet edge 1-2mm, and the width of described back side positive electrode grid line and negative electrode grid line is 1-3mm, and the spacing of back side positive electrode grid line and linear negative electrode grid line is 1-5mm.
Preferably, the pore size of described conductive through hole is 0.05-0.9mm;
The beneficial effect that the utility model is realized is: be printed with bending feeler grid line by an end of negative electrode grid line overleaf, the feeler grid line is positioned on the straight line with back side positive electrode grid line on the interconnection direction, thereby realized when carrying out battery sheet series welding, can use single straight line welding easily to realize being welded to back side negative electrode from the back side positive electrode of battery sheet, or be welded to back side positive electrode from the back side negative electrode of battery sheet, reduce MWT battery component packaging cost, quicken the industrialization of MWT battery.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the pattern of the embodiment of MWT solar battery front side conduction grid line of the present utility model;
Fig. 2 is the pattern of the MWT rear surface of solar cell conduction grid line of the utility model embodiment;
Fig. 3 ~ 5th, the sub pattern of the MWT solar battery front side conduction grid line of the utility model embodiment;
Fig. 6 is the partial enlarged drawing of the MWT rear surface of solar cell negative electrode bending feeler grid line of the utility model embodiment;
In the accompanying drawing: 1 positive conduction grid line, 2 conductive through holes, 3 back side positive electrode grid lines, 4 back side negative electrode grid lines, 5 negative electrode feeler grid lines, 6 isolation channels, 7 second layer branch lines, 8 the 3rd layers of branch line, 9 backbones, 10 frame grid lines.
Embodiment
In conjunction with the accompanying drawings the utility model is described in further detail 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.
Accompanying drawing 1 ~ 6th, most preferred embodiment of the present utility model, adopting the length of side is the solar cell of 156mm * 156mm, positive conduction grid line 1 is set in the front of solar cell, conductive through hole 2, back side positive electrode grid line 3, back side negative electrode grid line 4, positive conduction grid line 1 is connected to back side negative electrode grid line 4 by the conductive through hole 2 of solar cell, the relative back side of the one end positive electrode grid line 3 extend outwards 2-10mm of back side negative electrode grid line 4, bend to positive electrode grid line 3 direction right angles again, property positive electrode 3 directions outside right angle bending along the line again, bending length is 2-20mm, thereby forms the feeler grid line 5 of bending-type.Feeler grid line 5 is positioned on the straight line with back side positive electrode grid line 3 on the interconnection direction.Back side positive electrode grid line 3 is for to be arranged in parallel with back side negative electrode grid line 4.
The sectional drawing of described conductive through hole 2 is shaped as cylindrical or truncated cone-shaped, and the aperture is 0.05-0.9mm; Equidistantly be arranged in the front surface of battery on single direction, spread pattern is 4 * 4.The pattern of positive conduction grid line 1 is by constituting by 4 * 4 sub pattern of arranging, and the boundary of sub pattern is provided with straight line frame grid line 10, is communicated with the borderline phase of sub pattern, forms closed pattern.
Described positive electrode grid line 3 is symmetrically distributed along battery sheet center line.Be provided with isolation channel 6 around the back side negative electrode grid line 4, described isolation channel 6 is 0.1-4mm apart from the close Edge Distance of negative electrode grid line 4, and groove width is 0.1-3mm.
The width of described positive conduction grid line 1 is 30-90 μ m, and the outermost frame of grid line is apart from battery sheet edge 1-2mm, and the width of described back side positive electrode grid line 3 and negative electrode grid line 4 is 1-3mm, and the spacing of back side positive electrode grid line 3 and linear negative electrode grid line 4 is 1-5mm.
Described back side positive electrode grid line 3 is used in the discontinuous straightway, and back side negative electrode grid line 4 adopts the continous way straight line.
The sub pattern of positive conduction grid line 1 is the class snowflake type pattern that is made of the 3-tier architecture line, conductive through hole 2 is positioned at the center of sub pattern, what link to each other with conductive through hole 2 is backbone 9, quantity is the 6-15 bar, be evenly distributed on around the conductive through hole 2, backbone 9 is straight line or curve, its horizontal length 5-10mm; Second layer branch line 7 is connected between backbone 9 and the frame grid line 10, is straight line or curve, and horizontal length is between 5-12mm; The 3rd layer of branch line 8 connects second layer branch line 7 and frame grid line 10, is straight line or curve, and horizontal length is between 3-9mm; Distance between each grid line is at 1.5-3.5mm.Whole pattern is center symmetry and zhou duicheng tuxing.
This crystal silicon MWT solar cell is carried out series welding, the multi-disc battery is equidistantly placed along the direction of back side grid line, the back side positive electrode grid line 3 of a slice after the bending feeler 5 of negative electrode grid line 4 ends, the back side of a slice is soldered in the past with the generic linear welding, welding covers whole bending feeler 5 and positive electrode grid line 3.Negative pole welding in the front-end and back-end of entire cell string is drawn from bending feeler 5, and anodal welding is drawn from back side positive electrode grid line 3, links to each other with the respective electrode of next battery strings, thereby finishes the welding of whole solar panel.
With above-mentioned foundation desirable embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (8)
1. crystal silicon MWT solar cell, comprise battery front side conduction grid line (1), conductive through hole (2), back side positive electrode grid line (3), back side negative electrode grid line (4), positive conduction grid line (1) is connected to back side negative electrode grid line (4) by the conductive through hole (2) of solar cell, an end that it is characterized in that described back side negative electrode grid line (4) is printed with bending feeler grid line (5), and feeler grid line (5) is positioned on the straight line with back side positive electrode grid line (3) on the interconnection direction.
2. crystal silicon MWT solar cell according to claim 1 is characterized in that described back side positive electrode grid line (3) is discontinuous or continous way line style, is arranged in parallel with back side negative electrode grid line (4).
3. crystal silicon MWT solar cell according to claim 1, the sectional drawing that it is characterized in that described conductive through hole (2) is shaped as cylindrical or truncated cone-shaped, equidistantly be arranged in the front surface of battery on single direction, spread pattern is a kind of in 3 * 3,3 * 4,3 * 5,3 * 6,4 * 4,4 * 5,4 * 6.
4. crystal silicon MWT solar cell according to claim 1, the pattern that it is characterized in that positive conduction grid line (1) is made of several same sub pattern, the border of sub pattern links to each other with adjacent sub pattern border, form closed pattern, described sub pattern comprises the frame grid line (10) that surrounds all grid lines, be positioned at the conductive through hole (2) of the center of sub pattern, backbone (9), second layer branch line (7) and the 3rd layer of branch line (8), described second layer branch line (7) is flowed to backbone (9) with many articles of the 3rd layer of branch line (8), and described backbone (9) is flowed to conductive through hole (2) with many second layer branch lines (7).
5. crystal silicon MWT solar cell according to claim 1 is characterized in that described positive electrode grid line (3) is symmetrically distributed along battery sheet center line.
6. crystal silicon MWT solar cell according to claim 1 is characterized in that described feeler grid line (5) to the bending of positive electrode grid line (3) direction right angle, and along the outside right angle bending of positive electrode grid line (3) direction, bending length is 2-20mm again.
7. crystal silicon MWT solar cell according to claim 1, it is characterized in that back side negative electrode grid line (4) is provided with isolation channel (6) on every side, described isolation channel (6) is 0.1-4mm apart from the close Edge Distance of negative electrode grid line (4), and groove width is 0.1-3mm.
8. according to each described crystal silicon MWT solar cell in the claim 1 to 7, the width that it is characterized in that described positive conduction grid line (1) is 30-90 μ m, the outermost frame of positive conduction grid line (1) is apart from battery sheet edge 1-2mm, the width of described back side positive electrode grid line (3) and negative electrode grid line (4) is 1-3mm, and the spacing of back side positive electrode grid line (3) and linear negative electrode grid line (4) is 1-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018921 CN203085563U (en) | 2013-01-15 | 2013-01-15 | A crystal silicon MWT solar-energy battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018921 CN203085563U (en) | 2013-01-15 | 2013-01-15 | A crystal silicon MWT solar-energy battery |
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| Publication Number | Publication Date |
|---|---|
| CN203085563U true CN203085563U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320018921 Expired - Lifetime CN203085563U (en) | 2013-01-15 | 2013-01-15 | A crystal silicon MWT solar-energy battery |
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| CN (1) | CN203085563U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094369A (en) * | 2013-01-15 | 2013-05-08 | 常州亿晶光电科技有限公司 | Wafer silicon metal wrap through (MWT) solar cell |
| CN103730521A (en) * | 2013-12-27 | 2014-04-16 | 晶澳（扬州）太阳能科技有限公司 | MWT solar cell, MWT solar cell component and manufacturing method of MWT solar cell component |
-
2013
- 2013-01-15 CN CN 201320018921 patent/CN203085563U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094369A (en) * | 2013-01-15 | 2013-05-08 | 常州亿晶光电科技有限公司 | Wafer silicon metal wrap through (MWT) solar cell |
| CN103730521A (en) * | 2013-12-27 | 2014-04-16 | 晶澳（扬州）太阳能科技有限公司 | MWT solar cell, MWT solar cell component and manufacturing method of MWT solar cell component |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130724 |