CN203733816U - Multi-grid solar cell - Google Patents
Multi-grid solar cell Download PDFInfo
- Publication number
- CN203733816U CN203733816U CN201420083655.5U CN201420083655U CN203733816U CN 203733816 U CN203733816 U CN 203733816U CN 201420083655 U CN201420083655 U CN 201420083655U CN 203733816 U CN203733816 U CN 203733816U
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- China
- Prior art keywords
- grid line
- main grid
- line unit
- main
- thin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Photovoltaic Devices (AREA)
Abstract
Disclosed in the utility model is a multi-grid solar cell. An electrode grid line structure is arranged at the front surface of the cell; and a plurality of segmented back electrodes and an aluminum back field are correspondingly arranged at the back surface of the cell. The electrode grid line structure includes a plurality of main grid lines and a plurality of fine grid lines; each main grid line includes at least two main grid line units and at least one fine main grid line, wherein the width of the main grid line unit is larger than that of the fine main grid line and the width of the fine main grid line is larger than that of the fine grid line. According to the scheme, because the main grid lines of the electrode grid line structure are in a segmented structure, the widths of the fine main grid lines can be reduced under the circumstances that the widths of the main grid line units are maintained to be consistent with widths of main grid lines of the two-grid solar cell and the three-rid solar cell, so that the alignment precision of the main grid lines and interconnection bars can be improved during the assembly processing process of the multi-grid solar cell, the light shading area of the metal electrode of the multi-grid solar cell can be reduced, and the conversion efficiency of the multi-grid solar cell can be enhanced.
Description
Technical field
The utility model relates to technical field of solar batteries, relates in particular to a kind of multiple-grid solar battery sheet.
Background technology
Photovoltaic generation is one of current major way that utilizes solar energy, solar energy power generating because it is clean, safety, facility, the feature such as efficient, the new industry that has become countries in the world common concern and given priority to.Therefore, further investigate and utilize solar energy resources, alleviation crisis of resource, the tool of improving the ecological environment are of great significance.
Solar module is superposeed and forms successively by toughened glass, the first encapsulation glue-line, solar cell lamella, the second encapsulation glue-line and backboard.Wherein, solar cell lamella comprises many group solar cell strings.Every group of solar cell string comprises a plurality of solar battery sheets, and the front of each solar battery sheet is provided with main grid line, and its back side is provided with back electrode, by interconnecting strip, a plurality of solar battery sheets is connected to form to described solar cell string successively.Particularly, by interconnecting strip, the back electrode of the main grid line of previous solar battery sheet and adjacent solar battery sheet is interconnected successively.
Solar battery sheet in traditional solar module is only provided with two or three main grid lines conventionally, and it is two grid or three grid solar cell sheets that this solar battery sheet is called as.
In order further to promote the power output of solar module, the multiple-grid solar battery sheets such as four grid solar cell sheets, five grid solar cell sheets have become the focus of industry research at present.Multiple-grid solar battery sheet and two traditional grid, the difference of three grid solar cell sheets be, the number of main grid line is increased to more by two or three, simultaneously the narrowed width of main grid line.Yet main grid line is metal electrode, the increase of main grid line can cause the shading-area of metal electrode to increase, thereby affects the conversion efficiency of solar battery sheet.Therefore, in order not increase the shading-area of metal electrode, in general the quantity of main grid line is more, and the width of main grid line can arrange narrowlyer.
Yet, the precision that interconnecting strip that the width of main grid line is narrower when solar module is connected and main grid line are aimed at requires higher, in addition increasing of the quantity of main grid line reduced the operating efficiency that solar module connects, and increased the fragment rate of solar battery sheet and the use amount of interconnecting strip.So traditional assembly interconnection technique is restricting the suitability for industrialized production of multiple-grid solar cell.
Therefore, be necessary existing multiple-grid solar battery sheet to improve.
Utility model content
An object of the present utility model is to provide a kind of multiple-grid solar battery sheet, to improve the main grid line of multiple-grid solar battery sheet and the precision of aiming at of interconnecting strip.
Another object of the present utility model is to provide a kind of multiple-grid solar battery sheet, to reduce the shading-area of the metal electrode of multiple-grid solar battery sheet, improves the conversion efficiency of multiple-grid solar battery sheet.
To achieve these goals, the utility model provides a kind of multiple-grid solar battery sheet, and the front of described multiple-grid solar battery sheet is provided with gate electrode line structure, and its back side is provided with aluminium back surface field and many back electrodes; Wherein:
Described gate electrode line structure comprises many main grid lines and many thin grid lines, and every main grid line is vertical and crossing mutually with described many thin grid lines, and every main grid line comprises:
The first main grid line unit and the second main grid line unit, described the first main grid line unit and described the second main grid line unit are separately positioned on the two ends of described main grid line length direction, and perpendicular to described many thin grid lines; And
At least one thin main grid line, connects described the first main grid line unit and described the second main grid line unit, and perpendicular to described many thin grid lines;
The width of described the first main grid line unit and described the second main grid line unit is greater than the width of described thin main grid line, and the width of described thin main grid line is greater than the width of described thin grid line; And the width of described the first main grid line unit and described the second main grid line unit is 0.8mm-1.8mm; The width of described thin main grid line is 0.015mm-1.5mm; The width of described thin grid line is 0.01mm-0.1mm;
Described many back electrodes are segmented back electrode, and the position of back electrode is corresponding with the position of positive the first main grid line unit and the second main grid line unit.
Preferably, described main grid line unit is one end band point engraved structure.
Preferably, described main grid line unit is segmented engraved structure.
Preferably, described main grid line unit is segmented solid construction.
Preferably, described main grid line unit is one end band point solid construction.
Preferably, the length of described the first main grid line unit and/or described the second main grid line unit is 1.5mm-75mm.
Preferably, the number of described main grid line is 3-15 bar.
The utility model, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
1) the multiple-grid solar battery sheet that the utility model provides, its main grid line comprises the first main grid line unit, the second main grid line unit and at least one thin main grid line, wherein said the first main grid line unit or the second main grid line unit are for being connected with interconnecting strip, described thin main grid line is for collecting the electric current on the thin grid line intersecting with it, and do not need to cover interconnecting strip on described thin main grid line; By the width of the main grid line of the width of the first main grid line unit and the second main grid line unit and two grid solar cell sheets, three grid solar cell sheets is consistent, thereby can improve the alignment precision of multiple-grid solar battery sheet its main grid line and interconnecting strip in the assembly course of processing;
2) width of the thin main grid line of the multiple-grid solar battery sheet providing due to the utility model is less than the width of described the first main grid line unit and the second main grid line unit, and do not need to cover interconnecting strip on described thin main grid line, thereby under can the condition constant at the width of the first main grid line unit and the second main grid line unit, by length lengthening, the width of the thin main grid line not covered by interconnecting strip are done to the narrow shading-area that reduces the metal electrode of multiple-grid solar battery sheet, thereby have been improved the transformation efficiency of multiple-grid solar battery sheet;
3) back side of the multiple-grid solar battery sheet providing due to the utility model is provided with many back electrodes and aluminium back surface field, and described many back electrodes are segmented back electrode, saves the use amount of the silver slurry that printing back electrode uses; The position of back electrode is corresponding with the position of main grid line unit, front simultaneously, thereby facilitated multiple-grid solar battery sheet to realize assembly, connects.
Accompanying drawing explanation
The schematic diagram of the gate electrode line structure that Figure 1A provides for the utility model one embodiment;
Figure 1B is the partial enlarged drawing of the first main grid line unit in Figure 1A;
The schematic diagram of the back electrode structure that Fig. 2 provides for the utility model embodiment;
The schematic diagram of the gate electrode line structure that Fig. 3 provides for another embodiment of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the multiple-grid solar battery sheet the utility model proposes is described in further detail.According to the following describes and claims, advantage of the present utility model and feature will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only for convenient, the object of aid illustration the utility model embodiment lucidly.
Embodiment 1
The utility model provides a kind of multiple-grid solar battery sheet, and the front of this multiple-grid solar battery sheet is provided with gate electrode line structure, and its back side is provided with aluminium back surface field and many back electrodes.
Gate electrode line structure about this multiple-grid solar battery sheet front please refer to Figure 1A to Figure 1B, and as shown in Figure 1A, this gate electrode line structure comprises four main grid lines 10 and many thin grid lines 11, and thin grid line 11 is for collecting the electronic current of solar battery sheet; Every main grid line 10 is vertical and crossing mutually with many thin grid lines 11; Every main grid line 10 comprises the first main grid line unit 101, the second main grid line unit 102 and two thin main grid lines, is designated as the first thin main grid line 10A and the second thin main grid line 10B; Wherein:
The first main grid line unit 101 and the second main grid line unit 102 are separately positioned on the two ends of main grid line 10 length directions, and perpendicular to thin grid line 11; The first main grid line unit 101 and the second main grid line unit 102 are connected with the second thin main grid line 10B by the first thin main grid line 10A, and the first thin main grid line 10A and the second thin main grid line 10B be perpendicular to thin grid line 11, for collect with its thin grid line 11 intersecting on electric current.The first main grid line unit 101 and and the width of the second main grid line unit 102 be greater than the width of the first thin main grid line 10A and the second thin main grid line 10B, the width of the first thin main grid line 10A and the second thin main grid line 10B is greater than the width of thin grid line 11.
The gate electrode line structure that the present embodiment provides is by being arranged to segmentation structure by main grid line, specifically be set to comprise the first main grid line unit 101, the first thin main grid line 10A, the second thin main grid line 10B and the second main grid line unit 102, by cover interconnecting strip to realize the interconnected of this solar cell and other solar cell on the first main grid line unit 101 or the second main grid line unit 102, and pass through the width of the first main grid line unit 101 and the second main grid line unit 102 and two grid solar cell sheets, the width of the main grid line of three grid solar cell sheets is consistent, thereby can improve the alignment precision of multiple-grid solar battery sheet its main grid line and interconnecting strip in the assembly course of processing.
In this embodiment, the first main grid line unit 101 and the second main grid line unit 102 are hollow out coupling part, as shown in Figure 1B; Due to highly scattered here and there, be more convenient for being connected with interconnecting strip.
Wherein, the width of the first main grid line unit 101 and the second main grid line unit 102 is 0.8mm-1.8mm, and the width of the main grid line of this width and two grid solar cell sheets, three grid solar cell sheets is consistent.It should be noted that, on the number of main grid line and every main grid line, in this example of length of main grid line unit, do not do particular determination, and the main grid line unit number comprising in every main grid line does not limit yet, the length range of preferred main grid line unit (for example the first main grid line unit 101 and/or the second main grid line unit 102) is 1.5mm-75mm.According to the difference of solar battery sheet main grid line radical, can select the main grid line unit of different numbers and different length to form main grid line.And the length of the first main grid line unit 101 and second 102 two main grid line unit, main grid line unit can be the same or different, its value is according to determining with welding pulling force and the assembly power output of interconnecting strip.
Preferably, the width of the first thin main grid line 10A and the second thin main grid line 10B is 0.015mm-1.5mm, and the width of thin grid line 11 is 0.01mm-0.1mm.Yet the utility model is not as limit, the general width that only need control thin main grid line is less than the width of main grid line unit and is greater than the width of thin grid line.
It should be noted that, four the main grid line multicrystalline solar cells of 156mm * 156mm specification of only take in the present embodiment are elaborated as example.Those skilled in the art should be understood that, the solar battery sheet providing in the present embodiment is not limited in four main grid line multicrystalline solar cells of 156mm * 156mm specification, can also be the crystal silicon solar batteries sheet of other sizes, other main grid number of lines.For example, the number of main grid line can be 3-15 bar.
Back electrode structure about this multiple-grid solar cell back face please refer to Fig. 2, as shown in Figure 2, the back side of this multiple-grid solar battery sheet is provided with the back electrode 20 of four segmenteds, this back electrode 20 comprises that length and the width of the first electrode 201 and the second electrode 202, the first electrodes 201 and the second electrode 202 can determine according to the power output of this multiple-grid solar battery sheet.The position of the first electrode 201 and the second electrode 202 is corresponding with the position of the first main grid line unit 101 and the second main grid line unit 102 respectively.The present embodiment is set to segmentation structure by back electrode, thereby has saved the use amount of the silver slurry of printing back electrode use.And by the position of back electrode is corresponding with the position of main grid line unit, front, thereby facilitated multiple-grid solar battery sheet to realize assembly, connect.
Embodiment 2
The difference of the present embodiment and embodiment 1 is only the positive gate electrode line structure arranging of multiple-grid solar battery sheet, and except this difference, the structure of the multiple-grid solar battery sheet that the present embodiment provides is identical with embodiment 1, does not repeat them here.
The gate electrode line structure providing about the present embodiment refers to Fig. 3, and as shown in Figure 3, the difference of the gate electrode line structure providing in the gate electrode line structure in the present embodiment and embodiment 1 is:
In order to reduce interconnecting strip with the stress at solar battery sheet edge, and the charge carrier that reduces main grid line unit (for example the first main grid line unit 101 and the second main grid line unit 102) part is compound, main grid line unit (for example the first main grid line unit 101 and the second main grid line unit 102) can be optimized for one end band point segmentation structure, now each main grid line unit (for example the first main grid line unit 101 or the second main grid line unit 102) is divided into two sections, near a section of solar battery sheet edge, for being with sharp structure, two sections are connected by thin main grid line.
Except this difference, the gate electrode line structure that the present embodiment provides is identical with embodiment 1, does not repeat them here.
It should be noted that, the concrete structure of the main grid line unit that the utility model provides (for example the first main grid line unit 101 and the second main grid line unit 102) is not limited to the given concrete structure of above two embodiment, and main grid line unit (for example the first main grid line unit 101 and the second main grid line unit 102) can also be one end band point engraved structure or segmented engraved structure or segmented solid construction.
In sum, the utility model provides a kind of multiple-grid solar battery sheet, and its front is provided with gate electrode line structure, and its back side is provided with aluminium back surface field and many back electrodes; This gate electrode line structure comprises many main grid lines and many thin grid lines, and every main grid line is vertical and crossing mutually with described many thin grid lines; Every main grid line comprises at least two main grid line unit and at least one thin main grid line, and described main grid line unit is arranged on the two ends of described main grid line length direction, and connects by thin main grid line; The width of described main grid line unit is greater than the width of described thin main grid line, and the width of described thin main grid line is greater than the width of described thin grid line.The gate electrode line structure that the utility model provides is by being arranged to segmental structure by main grid line, thereby can on the consistent basis of the width of main grid line that the width of main grid line unit is held in to two grid solar cell sheets, three grid solar cell sheets, reduce the width of thin main grid line, thereby can improve multiple-grid solar battery sheet its main grid line and the alignment precision of interconnecting strip and the shading-area that reduces the metal electrode of multiple-grid solar battery sheet in the assembly course of processing, improve the transformation efficiency of multiple-grid solar battery sheet.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (7)
1. a multiple-grid solar battery sheet, is characterized in that, the front of described multiple-grid solar battery sheet is provided with gate electrode line structure, and its back side is provided with aluminium back surface field and many back electrodes; Wherein:
Described gate electrode line structure comprises many main grid lines and many thin grid lines, and every main grid line is vertical and crossing mutually with described many thin grid lines, and every main grid line comprises:
The first main grid line unit and the second main grid line unit, described the first main grid line unit and described the second main grid line unit are separately positioned on the two ends of described main grid line length direction, and perpendicular to described many thin grid lines; And
At least one thin main grid line, connects described the first main grid line unit and described the second main grid line unit, and perpendicular to described many thin grid lines;
The width of described the first main grid line unit and described the second main grid line unit is greater than the width of described thin main grid line, and the width of described thin main grid line is greater than the width of described thin grid line; And the width of described the first main grid line unit and described the second main grid line unit is 0.8mm-1.8mm; The width of described thin main grid line is 0.015mm-1.5mm; The width of described thin grid line is 0.01mm-0.1mm;
Described many back electrodes are segmented back electrode, and the position of back electrode is corresponding with the position of positive the first main grid line unit and the second main grid line unit.
2. multiple-grid solar battery sheet as claimed in claim 1, is characterized in that, described main grid line unit is one end band point engraved structure.
3. multiple-grid solar battery sheet as claimed in claim 1, is characterized in that, described main grid line unit is segmented engraved structure.
4. multiple-grid solar battery sheet as claimed in claim 1, is characterized in that, described main grid line unit is segmented solid construction.
5. multiple-grid solar battery sheet as claimed in claim 1, is characterized in that, described main grid line unit is one end band point solid construction.
6. multiple-grid solar battery sheet as claimed in claim 1, is characterized in that, the length of described the first main grid line unit and/or described the second main grid line unit is 1.5mm-75mm.
7. multiple-grid solar battery sheet as claimed in claim 1, is characterized in that, the number of described main grid line is 3-15 bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420083655.5U CN203733816U (en) | 2014-02-26 | 2014-02-26 | Multi-grid solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420083655.5U CN203733816U (en) | 2014-02-26 | 2014-02-26 | Multi-grid solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203733816U true CN203733816U (en) | 2014-07-23 |
Family
ID=51203864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420083655.5U Expired - Lifetime CN203733816U (en) | 2014-02-26 | 2014-02-26 | Multi-grid solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203733816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319297A (en) * | 2014-11-07 | 2015-01-28 | 浙江晶科能源有限公司 | Solar battery piece |
-
2014
- 2014-02-26 CN CN201420083655.5U patent/CN203733816U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319297A (en) * | 2014-11-07 | 2015-01-28 | 浙江晶科能源有限公司 | Solar battery piece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
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| CX01 | Expiry of patent term |