CN204927301U - A kind of MWT solar cell - Google Patents
A kind of MWT solar cell Download PDFInfo
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- CN204927301U CN204927301U CN201520499169.6U CN201520499169U CN204927301U CN 204927301 U CN204927301 U CN 204927301U CN 201520499169 U CN201520499169 U CN 201520499169U CN 204927301 U CN204927301 U CN 204927301U
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Abstract
本实用新型公开了一种MWT太阳能电池，所述MWT太阳能电池包括边长为L的正方形太阳能电池片；所述太阳能电池片被均匀划分为n×m个单元，其中n≠m；在每个单元的中心点设置有导电通孔，所述导电通孔贯穿所述太阳能电池片；所述太阳能电池片正面栅线收集的电流通过所述导电通孔传导到背面电极。本实用新型提供的MWT太阳能电池不仅可以消除在电池排布阶段容易出现的导电通孔与背面电极匹配易出错的问题，还提高了MWT组件的合格品率及产量；而且可使电池片的电流收集增加，进而提高太阳能电池的光电转换效率。
The utility model discloses a MWT solar cell. The MWT solar cell includes a square solar cell with a side length of L; the solar cell is evenly divided into n×m units, where n≠m; The central point of the unit is provided with a conductive through hole, and the conductive through hole runs through the solar battery sheet; the current collected by the front grid line of the solar battery sheet is conducted to the back electrode through the conductive through hole. The MWT solar cell provided by the utility model can not only eliminate the error-prone problem of matching the conductive through hole and the back electrode that is easy to occur in the cell arrangement stage, but also improve the qualified product rate and output of the MWT component; and can make the current of the cell The collection is increased, which in turn increases the photoelectric conversion efficiency of the solar cell.
Description
Technical field
The utility model belongs to solar cell field of batteries, relates in particular to a kind of MWT solar cell.
Background technology
Metal piercing winding technique (MetallizationWrapThrough is called for short MWT) is mainly by being directed to silicon chip back side, to reduce the mode of shading-area to improve conversion efficiency by the contact electrode being positioned at front side emitter pole through silicon chip matrix.This technology only simply need be transformed the volume production platform of existing silicon based cells production line, and namely only increase by one laser beam perforation processing step, just can realize, simple to operate, cost is lower, is easy to spread.
At present, MWT battery front mainly adopts the lattice arrangement of 4*4, namely the front of MWT battery be centered by the figure of symmetric arrays, with reference to figure 1; Its back side figure is axisymmetric figure, with reference to figure 2.In component manufacturing processes, need cell piece to be arranged in conductive backings, the figure in conductive backings and cell backside figure one_to_one corresponding.During arrangement cell piece, after front description half-twist, figure is not any change.And figure half-twist rear electrode position, the back side can not be correctly corresponding with the conductive hole in conductive backings.Therefore, the extra position checking back side figure is needed when placing battery plate, to guarantee that the electrode of back side figure can mate corresponding with the conductive hole in conductive backings.Aforesaid operations not only adds processing step, also add the probability of makeing mistakes in cell piece arrangement process.
In addition, the development of advancing by leaps and bounds along with screen printing technique, the printing width of the thin grid line of front half tone drops to 80 μm, 60 μm, up till now 40 μm again from 100 μm.The width of thin grid line is more and more less, and when size of current is constant, thin grid line is thinner, and the power loss on thin grid line is more.So the battery front side figure of a 4*4 common at present conductive through hole can not collect the electric current that battery produces to greatest extent.We need the number increasing conductive through hole for this reason, increase the collection of electric current, reduce the power loss on thin grid line with this.And the increase of conductive hole number, obviously can increase and the electrode of back side figure and the conductive through hole in conductive backings are carried out mating corresponding technology difficulty, error rate also can significantly rise thereupon.
Therefore need a kind of MWT solar cell that can solve above-mentioned difficulty in process, in reduction technology difficulty with while reducing error rate, also improve the efficiency of solar cell.
Utility model content
In order to solve defect of the prior art, reduce the technology difficulty of MWT manufacture of solar cells, improve solar battery efficiency, the utility model provides a kind of MWT solar cell.
According to an aspect of the present utility model, provide a kind of MWT solar cell, described MWT solar cell comprises the square solar battery sheet that the length of side is L;
Described solar battery sheet is divided evenly as n*m unit, n ≠ m;
The central point of each unit is provided with conductive through hole, and described conductive through hole runs through described solar battery sheet;
The electric current that described solar battery sheet front gate line is collected is transmitted to backplate by described conductive through hole.
According to an embodiment of the present utility model, n >=4, m >=5.
According to another embodiment of the present utility model, described conductive through hole vertically runs through described solar battery sheet.
According to another embodiment of the present utility model, described conductive through hole is cylindrical, truncated cone-shaped, square or cuboid.
The MWT solar battery front side that the utility model provides is equally divided into n*m unit, n ≠ m; The central point of each unit is conductive through hole.The electric current that front gate line is collected passes to backplate by conductive through hole.Because front is n*m (n ≠ m) arrangement, front description and back side figure one_to_one corresponding.Only need when battery is arranged front to place correct, the situation of cell piece back side conductive through hole mistake corresponding to the conductive through hole in conductive backings would not be occurred.The MWT solar cell preparation that the utility model provides simply, easily obtains; Accepted product percentage and output high; The photoelectric conversion efficiency of solar cell is high.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Figure 1 shows that the front description schematic diagram of existing MWT solar cell;
Figure 2 shows that the back side pictorial diagram of existing MWT solar cell;
The structural representation of an embodiment of a kind of MWT solar cell provided according to the utility model is provided.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.It should be noted that parts illustrated in the accompanying drawings are not necessarily drawn in proportion.The utility model eliminates the description of known assemblies and treatment technology and process to avoid unnecessarily limiting the utility model.
With reference to figure 3, Figure 3 shows that the structural representation of an embodiment of a kind of MWT solar cell provided according to the utility model.
The MWT solar cell that the utility model provides comprises the square solar battery sheet 1 that the length of side is L.This solar battery sheet 1 is divided evenly as n*m unit, wherein, and n ≠ m.The central point of each unit is provided with conductive through hole 2, and therefore the number of conductive through hole 2 is also n*m, wherein, and n ≠ m.
Described conductive through hole 2 runs through described solar battery sheet.The electric current that described solar battery sheet front gate line 3 is collected is transmitted to backplate by described conductive through hole 2.Pass to loss to reduce electric current, preferably, described conductive through hole 2 vertically runs through described solar battery sheet 1 and arranges.Although the shape of conductive through hole 2 does not need special restriction, as long as can conduction current, pass to efficiency to improve, reduce current loss, preferably, described conductive through hole 2 is cylindrical, truncated cone-shaped, square or cuboid.More preferred, described conductive through hole 2 circle of position cylindricality.
Along with the development of screen printing technique, the width of the front gate line 3 of solar battery sheet 1 is more and more thinner.When keeping size of current constant, the width of grid line 3 is narrower, and on grid line 3, the power of loss is more.In order to increase the collection of electric current as far as possible, reducing the power loss on grid line 3, needing the number increasing conductive through hole 2.Therefore, preferably, wherein n >=4, m >=5, such as: n=4, n=8 or n=10; M=5, m=9 or m=11.
The MWT solar cell that the utility model provides effectively can solve the conductive through hole easily occurred in the battery arrangement stage and mate the problem of easily makeing mistakes with backplate, improves accepted product percentage and the output of MWT assembly; Add the electric current collection of cell piece, improve the photoelectric conversion efficiency of solar cell.
Although describe in detail about example embodiment and advantage thereof, being to be understood that when not departing from the protection range of spirit of the present utility model and claims restriction, various change, substitutions and modifications can being carried out to these embodiments.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520499169.6U CN204927301U (en) | 2015-07-09 | 2015-07-09 | A kind of MWT solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520499169.6U CN204927301U (en) | 2015-07-09 | 2015-07-09 | A kind of MWT solar cell |
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| Publication Number | Publication Date |
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| CN204927301U true CN204927301U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520499169.6U Expired - Lifetime CN204927301U (en) | 2015-07-09 | 2015-07-09 | A kind of MWT solar cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018176527A1 (en) * | 2017-03-30 | 2018-10-04 | 乐叶光伏科技有限公司 | Solar shingle assembly employing center-converging fingers converging toward electrode |
| CN110783421A (en) * | 2019-11-06 | 2020-02-11 | 维科诚（苏州）光伏科技有限公司 | Solar cell and preparation method thereof |
-
2015
- 2015-07-09 CN CN201520499169.6U patent/CN204927301U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018176527A1 (en) * | 2017-03-30 | 2018-10-04 | 乐叶光伏科技有限公司 | Solar shingle assembly employing center-converging fingers converging toward electrode |
| CN110783421A (en) * | 2019-11-06 | 2020-02-11 | 维科诚（苏州）光伏科技有限公司 | Solar cell and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220609 Address after: 314417 No. 1 Jisheng Road, Jiaxing City, Zhejiang Province Patentee after: Zhengtai Xinneng Technology Co.,Ltd. Address before: 310053 No. 1335 Bin'an Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: CHINT SOLAR (ZHEJIANG) Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314417 No. 1 Jisheng Road, Jiaxing City, Zhejiang Province Patentee after: Zhengtai Xinneng Technology Co.,Ltd. Address before: 314417 No. 1 Jisheng Road, Jiaxing City, Zhejiang Province Patentee before: Zhengtai Xinneng Technology Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20151230 |