CN204632769U - A kind of back electrode structure of many main grids solar cell - Google Patents
A kind of back electrode structure of many main grids solar cell Download PDFInfo
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- CN204632769U CN204632769U CN201520363034.7U CN201520363034U CN204632769U CN 204632769 U CN204632769 U CN 204632769U CN 201520363034 U CN201520363034 U CN 201520363034U CN 204632769 U CN204632769 U CN 204632769U
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Abstract
The utility model discloses a kind of back electrode structure of many main grids solar cell, comprise several column back electrode row; Described back electrode arranges and is made up of a plurality of repetitive longitudinal arrangement; Described repetitive comprises the Spot electrodes of at least 2 longitudinal separation arrangements; The length of described repetitive is more than or equal to 3mm, and its width is more than or equal to 1mm; The gross area of described back electrode accounts for 1 ~ 5% of cell area.The utility model increases welding pulling force, improves the reliability of welding, can meet the requirement that slurry consumption is lower, and takes into account the demand of the aspects such as welding aligning and welding pulling force simultaneously, achieves significant effect.
Description
Technical field
The utility model relates to a kind of back electrode structure of many main grids solar cell, belongs to technical field of solar batteries.
Background technology
Conventional fossil fuel approach exhaustion day by day, in existing sustainable energy, solar energy is undoubtedly the most clean, the most general and most potential alternative energy source of one.Device of solar generating is also called solar cell or photovoltaic cell, solar energy can be directly changed into electric energy, and its electricity generating principle is the photovoltaic effect of based semiconductor PN junction.
Current conventional volume production is 3 ~ 4 main gate line (busbar) solar cells, and the effect of busbar is mainly used to the welding carrying out assembly.But along with the development of technology, occurred the electrode structure at right side of many main gate line, this structure can make the transmission length of secondary gate current more short, makes the resistive power loss on secondary grid more little.For the above-mentioned solar cell with many main gate line electrode structure at right sides, the quantity of the main grid alignment of the quantity that in its back electrode structure, back electrode arranges and position needs and front electrode and position one_to_one corresponding.Because the quantity of back electrode row increases, if silver slurry consumption will be kept not increase, the area of each backplane will diminish; This just causes assembly also will adopt thinner welding when welding, and this adds increased the difficulty that welding is aimed at.
On the other hand, after welding attenuates, when particularly adopting circular welding to weld, the painting tin of welding and electrode contact is less, and tin can be sprawled along whole backplane length direction to both sides after melting, cause the amount of sprawling of the scolding tin in unit length to reduce, cause welding pulling force not enough, the reliability of final impact welding.
Therefore, the how back electrode structure of appropriate design many main grids battery, to meet slurry consumption simultaneously, welding aims at and the demand of welding pulling force, becomes this area and is badly in need of one of technical barrier solved.
Summary of the invention
Goal of the invention of the present utility model is to provide a kind of back electrode structure of many main grids solar cell.
To achieve the above object of the invention, the technical solution adopted in the utility model is: a kind of back electrode structure of many main grids solar cell, and comprise several column back electrode row, described back electrode arranges and is made up of a plurality of repetitive longitudinal arrangement;
Described repetitive comprises the Spot electrodes of at least 2 longitudinal separation arrangements;
The length of described repetitive is more than or equal to 3mm, and its width is more than or equal to 1 mm;
The gross area of described back electrode accounts for 1 ~ 5% of cell area.
In technique scheme, the quantity of described back electrode row is 8 ~ 50 row.
Preferably, the quantity of described back electrode row is 9 ~ 30 row.
Preferably, in described repetitive, be communicated with by connecting line between each Spot electrodes.
Above-mentioned connecting line plays the effect of bridge formation on the one hand, play the effect of transition temperature on the other hand, when adding thermal weld, welding bottom surface contact in this region of backplane is all silver, the temperature of welding is relatively more even, and the flowing of tin is smooth and easy, makes scolding tin evenly apply whole backplane, welding also can be welded on connecting line simultaneously, forms more contacts.
Preferably, described repetitive comprises the Spot electrodes of at least 3 longitudinal separation arrangements, and the area of the Spot electrodes at two ends is greater than the area of middle Spot electrodes up and down.
The large Spot electrodes in two, two ends is used for ensureing welding pulling force, and middle Spot electrodes pulling force is less, mainly plays the effect of bridge formation.
In technique scheme, the quantity of the quantity of back electrode row and the main grid alignment of position and front electrode and position one_to_one corresponding.Also can quantity different or position is different or number of locations is all different.
In technique scheme, the shape of described Spot electrodes is square, circular, oval or triangle.Certainly, described Spot electrodes also can be polygon, or more the combination of other shapes.
Because technique scheme is used, the utility model compared with prior art has following advantages:
1, the utility model develops a kind of back electrode structure of new solar cell, by the repetitive in back electrode row being designed to the structure of the Spot electrodes comprising the arrangement of multiple longitudinal separation, when welding and electrode welding, tin can fully be stayed on Spot electrodes after melting, be paved with whole Spot electrodes, contact area is large, thus increases welding pulling force, improves the reliability of welding;
2, back electrode structure of the present utility model defines the gross area of back electrode, can meet the requirement that slurry consumption is lower, and takes into account the demand of the aspects such as welding aligning and welding pulling force simultaneously, achieves significant effect;
3, structure of the present utility model is simple, is easy to realize, and is suitable for applying.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the A portion enlarged drawing of Fig. 1.
Fig. 3 is the structural representation of the utility model embodiment two.
Fig. 4 is the B portion enlarged drawing of Fig. 3.
Fig. 5 is the structural representation of the utility model embodiment three.
Fig. 6 is the C portion enlarged drawing of Fig. 5.
Wherein: 1, repetitive; 2, Spot electrodes; 3, connecting line.
Embodiment
Below in conjunction with embodiment, the utility model is further described.
Embodiment one
Shown in Fig. 1 ~ 2, a kind of back electrode structure of many main grids solar cell, comprises 15 row back electrode row, the quantity of the quantity of back electrode row and the main grid alignment of position and front electrode and position one_to_one corresponding; Described back electrode arranges and is made up of 5 repetitive 1 longitudinal arrangements;
Described repetitive 1 comprises the Spot electrodes 2 of 3 longitudinal separation arrangements;
The length of described repetitive is 4.5mm, and its width is 1.6 mm;
The gross area of described back electrode accounts for 2.2% of cell area.
In described repetitive, be communicated with by connecting line 3 between each Spot electrodes.
Described repetitive comprises the Spot electrodes of 3 longitudinal separation arrangements, and the area of the Spot electrodes at two ends is greater than the area of middle Spot electrodes up and down.
The shape of described Spot electrodes is square.
Embodiment two
Shown in Fig. 3 ~ 4, a kind of back electrode structure of many main grids solar cell, comprises 15 row back electrode row, the quantity of the quantity of back electrode row and the main grid alignment of position and front electrode and position one_to_one corresponding; Described back electrode arranges and is made up of 5 repetitive longitudinal arrangements;
Described repetitive comprises the Spot electrodes of 3 longitudinal separation arrangements;
The length of described repetitive is 5.5mm, and its width is 1.6mm;
The gross area in described back electrode region accounts for 2.7% of cell area.
Described repetitive comprises the Spot electrodes of 3 longitudinal separation arrangements, and the area of the Spot electrodes at two ends is greater than the area of middle Spot electrodes up and down.
The shape of described Spot electrodes is square.
Embodiment three
Shown in Fig. 5 ~ 6, a kind of back electrode structure of many main grids solar cell, comprises 15 row back electrode row, the quantity of the quantity of back electrode row and the main grid alignment of position and front electrode and position one_to_one corresponding; Described back electrode arranges and is made up of 5 repetitive longitudinal arrangements;
Described repetitive comprises the Spot electrodes of 4 longitudinal separation arrangements;
The length of described repetitive is 6mm, and its width is 1.6 mm;
The gross area in described back electrode region accounts for 3% of cell area.
Described repetitive comprises the Spot electrodes of 4 longitudinal separation arrangements, and the area of the Spot electrodes at two ends is greater than the area of middle Spot electrodes up and down.
The shape of described Spot electrodes is square.
Claims (7)
1. a back electrode structure for the solar cell of main grid more than, comprise several column back electrode row, described back electrode arranges and is made up of a plurality of repetitive longitudinal arrangement; It is characterized in that:
Described repetitive (1) comprises the Spot electrodes (2) of at least 2 longitudinal separation arrangements;
The length of described repetitive is more than or equal to 3 mm, and its width is more than or equal to 1 mm;
The gross area of described back electrode accounts for 1 ~ 5% of cell area.
2. the back electrode structure of many main grids solar cell according to claim 1, is characterized in that: the quantity of described back electrode row is 8 ~ 50 row.
3. the back electrode structure of many main grids solar cell according to claim 2, is characterized in that: the quantity of described back electrode row is 9 ~ 30 row.
4. the back electrode structure of many main grids solar cell according to claim 1, is characterized in that: in described repetitive, is communicated with between each Spot electrodes by connecting line (3).
5. the back electrode structure of many main grids solar cell according to claim 1, it is characterized in that: described repetitive comprises the Spot electrodes of at least 3 longitudinal separation arrangements, and the area of the Spot electrodes at two ends is greater than the area of middle Spot electrodes up and down.
6. the back electrode structure of many main grids solar cell according to claim 1, is characterized in that: the shape of described Spot electrodes is square, circular, oval or triangle.
7. the back electrode structure of many main grids solar cell according to claim 1, is characterized in that: the quantity of the described quantity of back electrode row and the main grid alignment of position and front electrode and position one_to_one corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520363034.7U CN204632769U (en) | 2015-05-29 | 2015-05-29 | A kind of back electrode structure of many main grids solar cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520363034.7U CN204632769U (en) | 2015-05-29 | 2015-05-29 | A kind of back electrode structure of many main grids solar cell |
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| CN204632769U true CN204632769U (en) | 2015-09-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633177A (en) * | 2016-01-28 | 2016-06-01 | 黄河水电光伏产业技术有限公司 | Crystalline silicon solar cell |
| CN105679849A (en) * | 2016-01-28 | 2016-06-15 | 黄河水电光伏产业技术有限公司 | Crystalline silicon solar cell |
| CN105679850A (en) * | 2016-01-28 | 2016-06-15 | 黄河水电光伏产业技术有限公司 | Crystalline silicon solar cell |
-
2015
- 2015-05-29 CN CN201520363034.7U patent/CN204632769U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633177A (en) * | 2016-01-28 | 2016-06-01 | 黄河水电光伏产业技术有限公司 | Crystalline silicon solar cell |
| CN105679849A (en) * | 2016-01-28 | 2016-06-15 | 黄河水电光伏产业技术有限公司 | Crystalline silicon solar cell |
| CN105679850A (en) * | 2016-01-28 | 2016-06-15 | 黄河水电光伏产业技术有限公司 | Crystalline silicon solar cell |
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Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: CSI Cells Co.,Ltd. Patentee after: Funing atlas sunshine Power Technology Co., Ltd Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI Cells Co.,Ltd. Patentee before: CSI-GCL SOLAR MANUFACTURING (YANCHENG) Co.,Ltd. |