CN204651330U - A kind of solar battery structure - Google Patents
A kind of solar battery structure Download PDFInfo
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- CN204651330U CN204651330U CN201520420690.6U CN201520420690U CN204651330U CN 204651330 U CN204651330 U CN 204651330U CN 201520420690 U CN201520420690 U CN 201520420690U CN 204651330 U CN204651330 U CN 204651330U
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- solar battery
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- 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
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Abstract
The utility model discloses a kind of solar battery structure, comprise front and be provided with the solar battery sheet that front electrode and the back side are provided with back electrode and back of the body electric field structure, described front electrode comprises main gate line, many secondary grid lines vertical with described main gate line and many parallel with described main gate line thin grid lines, and described main gate line is positioned at the top edge of described solar battery sheet; Described back electrode is positioned at the lower limb of described solar battery sheet, and parallel with described main gate line; The region of described back of the body electric field structure is overlapping with the area part of described back electrode, and main gate line and the back electrode of adjacent described solar battery sheet are stacked.Adopt the assembly that described solar battery structure makes, due to the main gate line of adjacent described solar battery sheet and back electrode stacked, there is overlapping region, eliminate and use welding to connect front and the back side, decrease the use amount of welding, decrease shading-area, improve the efficiency of light absorption of assembly, improve component power.
Description
Technical field
The utility model belongs to technical field of solar cells, is specifically related to a kind of solar battery structure.
Background technology
Solar cell is a kind of is directly the device of electric energy by light energy conversion based on photovoltaic effect.The Making programme of conventional structure crystal silicon solar batteries comprises making herbs into wool, diffusion, back-etching, nitride deposition, silk screen printing, sintering.Conventional crystal silicon solar batteries generally adopts more than 1 main grid in the setting placed in the middle of cell piece surface, and secondary grid line and main grid vertical center are uniformly distributed, and the position of back electrode is consistent with positive electrode main grid, the stress rupture of welding is reduced to minimum.In current assembly is produced, welding must be used to be connected at the back side of the front of cell piece with adjacent cell sheet, composition series circuit.Like this be designed with following feature:
1, cell piece is made assembly welding must be used to weld, and the stress of welding can cause cell piece fragment;
2, the temperature of welding can destroy the PN junction of cell piece;
3, the shading-area of welding is comparatively large, and the power loss caused thus is 3% ~ 4%;
4, when the solar cell of this kind of structure forms assembly, battery and battery directly must keep certain gap, and bending in order to welding, this is apart from too small, and fragment rate can be caused to rise.
Utility model content
The utility model provides a kind of solar battery structure, eliminates and uses welding to connect front and the back side, decrease the use amount of welding, decrease shading-area, improve the efficiency of light absorption of assembly, improve component power.
For solving the problems of the technologies described above, the utility model embodiment provides a kind of solar battery structure, comprise solar battery sheet, the front of described solar battery sheet is provided with front electrode, the back side of described solar battery sheet is provided with back electrode and back of the body electric field structure, wherein, described front electrode comprises main gate line, many secondary grid lines vertical with described main gate line and many parallel with described main gate line thin grid lines, and described main gate line is positioned at the top edge of described solar battery sheet; Described back electrode is positioned at the lower limb of described solar battery sheet, and parallel with described main gate line; The region of described back of the body electric field structure is overlapping with the area part of described back electrode, and main gate line and the back electrode of adjacent described solar battery sheet are stacked.
Preferably, described main gate line is the main gate line of hollow out.
Preferably, the quantity of described main gate line is many.
Preferably, the width of the width of described secondary grid line on top edge be the width of lower limb 1-20 doubly.
Preferably, the width of described secondary grid line broadens gradually from lower limb to top edge.
Preferably, the width of described secondary grid line fades to 120 μm by 60 μm from lower limb to top edge.
Preferably, many described thin grid lines are equidistantly arranged.
Preferably, the quantity of described thin grid line is six, the width of many described thin grid lines from the close-by examples to those far off becomes arithmetic progression to successively decrease successively from the spacing of described main gate line, the width of the described thin grid line nearest apart from described main gate line is 110 μm, is 60 μm apart from the width of described main gate line described thin grid line farthest.
Preferably, the drift angle place of described front electrode is provided with chamfering.
Preferably, the top edge of described back electrode has laciniation.
The described solar battery structure that the utility model embodiment provides compared with prior art, has following beneficial effect:
The described solar battery structure that the utility model embodiment provides, comprise solar battery sheet, the front of described solar battery sheet is provided with front electrode, the back side of described solar battery sheet is provided with back electrode and back of the body electric field structure, wherein, described front electrode comprises main gate line, many secondary grid lines vertical with described main gate line and many parallel with described main gate line thin grid lines, and described main gate line is positioned at the top edge of described solar battery sheet; Described back electrode is positioned at the lower limb of described solar battery sheet, and parallel with described main gate line; The region of described back of the body electric field structure is overlapping with the area part of described back electrode, and main gate line and the back electrode of adjacent described solar battery sheet are stacked.
It is stacked that described solar battery structure makes the main grid of positive electrode and back electrode directly contact in the process making assembly, thus eliminate use welding connection front and the back side, decreases the use amount of welding, decrease shading-area, improve component power; There is a part of overlapping region between adjacent described solar battery sheet, improve the area ratio of the absorption sunlight of assembly, also namely improve the absorption efficiency of sunlight, improve component power.
In sum, described solar battery structure directly contacts stacked due to the main grid of positive electrode with back electrode, decreases the use amount of welding, lifting subassembly power.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The front schematic view of a kind of embodiment of the solar battery structure that Fig. 1 provides for the utility model embodiment;
The front close-up schematic view of a kind of embodiment of the solar battery structure that Fig. 2 provides for the utility model embodiment;
The schematic rear view of a kind of embodiment of the solar battery structure that Fig. 3 provides for the utility model embodiment.
Embodiment
Just as described in the background section, assembly of the prior art must use welding to be connected at the back side of the front of cell piece with adjacent cell sheet in producing, composition series circuit.Like this be designed with following feature: cell piece is made assembly and welding must be used to weld, and the stress of welding can cause cell piece fragment; The temperature of welding can destroy the PN junction of cell piece; The shading-area of welding is comparatively large, and the power loss caused thus is 3% ~ 4%; When the solar cell of this kind of structure forms assembly, battery directly must keep certain gap with battery, and bending in order to welding, this is apart from too small, and fragment rate can be caused to rise.
Based on this, the utility model embodiment provides a kind of described solar battery structure, comprise solar battery sheet, the front of described solar battery sheet is provided with front electrode, the back side of described solar battery sheet is provided with back electrode and back of the body electric field structure, wherein, described front electrode comprises main gate line, many secondary grid lines vertical with described main gate line and many parallel with described main gate line thin grid lines, and described main gate line is positioned at the top edge of described solar battery sheet; Described back electrode is positioned at the lower limb of described solar battery sheet, and parallel with described main gate line; The region of described back of the body electric field structure is overlapping with the area part of described back electrode, and main gate line and the back electrode of adjacent described solar battery sheet are stacked.
In sum, it is stacked that described solar battery structure makes the main grid of positive electrode and back electrode directly contact in the process making assembly, thus eliminate use welding connection front and the back side, decreases the use amount of welding, decrease shading-area, improve component power; There is a part of overlapping region between adjacent described solar battery sheet, improve the area ratio of the absorption sunlight of assembly, also namely improve the absorption efficiency of sunlight, improve component power.
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The front schematic view of a kind of embodiment of the solar battery sheet provided for the utility model embodiment with reference to figure 1, Fig. 2 and Fig. 3, Fig. 1; The front close-up schematic view of a kind of embodiment of the solar battery structure that Fig. 2 provides for the utility model embodiment; The schematic rear view of a kind of embodiment of the solar battery structure that Fig. 3 provides for the utility model embodiment.
In the concrete mode of one, described solar battery structure, comprise solar battery sheet, the front of described solar battery sheet is provided with front electrode, the back side of described solar battery sheet is provided with back electrode 30 and back of the body electric field structure, wherein, described front electrode comprises main gate line 10, many secondary grid lines 20 vertical with described main gate line 10 and many thin grid lines parallel with described main gate line 10, and described main gate line 10 is positioned at the top edge of described solar battery sheet; Described back electrode 30 is positioned at the lower limb of described solar battery sheet, and parallel with described main gate line 10; The region of described back of the body electric field structure is overlapping with the area part of described back electrode 30, and the main gate line 10 of adjacent described solar battery sheet is stacked with back electrode 30.
In the particular embodiment, the length of the width W 1 of described main gate line 10 to be 0.5mm ~ 5mm, length L1 be described solar battery sheet deducts 1mm ~ 6mm.The direction vertical with described main gate line 10 is provided with the described secondary grid line 20 of 50 ~ 200, and the part that described secondary grid line 20 contacts described main gate line 10 has length L2 to be the bonding pad of 0.5mm ~ 10mm.The direction parallel with described main gate line 10 is provided with 0 ~ 25 described thin grid line, and described main gate line 10, described secondary grid line 20 and described thin grid line can adopt different materials separately to make, and also can adopt identical material.Described thin grid line is that the width of the more described main gate line of its width 10 is less, and the maximum current passed through is less than the maximum current that described main gate line 10 is passed through.Described back electrode 30 is at the lower limb of described solar battery sheet, and the similar width of width W 3 and the main gate line 10 of described front electrode, length L3 is the back electrode 30 that the length of described solar battery sheet subtracts 0.5mm ~ 5mm.Its width W 4 of described back of the body electric field structure subtracts 0.5mm ~ 5mm for silicon chip length and has certain overlapping region with back electrode 30, and its length L4 is that silicon chip length subtracts 0.5mm ~ 5mm, and on top edge drift angle place is provided with chamfering or does not arrange.Described back of the body electric field structure length is 151mm, and width is 154mm.
It should be noted that, the length of the length of described main gate line 10, the length of described back electrode 30 and described back of the body electric field structure is all 0.5mm ~ 5mm, but their length can be equal, also can be unequal, and the utility model is not specifically limited.
Preferably, described main gate line 10 is the main gate line 10 of hollow out.Under the normal work not reducing described main gate line 10 (described normal work refers to structural strength, galvanization ability), described main gate line 10 is the main gate line 10 of hollow out, both the materials'use amount of main gate line 10 can have been reduced, reduce costs, simultaneously due to hollow out, increase the area of the absorption sunlight of described solar battery sheet, improve the power of assembly.
Certainly, the quantity of described main gate line 10 also can be many.When the quantity of described main gate line 10 is more, the maximum current that described solar battery sheet passes through increases, the electric current reducing the zones of different of described solar battery sheet can not the possibility of serious unbalance, the electric current avoiding causing some region to pass through is excessive, temperature is too high, burn described solar battery sheet, improve reliability of operation.It should be noted that, the quantity of the utility model to described main gate line 10 is not specifically limited, if described main gate line 10 hollow out, and the quantity of the described main gate line 10 of increase that can be suitable during design.
The width of the width of described secondary grid line 20 on top edge be the width of lower limb 1-20 doubly.The width of described secondary grid line 20 can be identical with the width of described main gate line 10, also can be different.Due to described secondary grid line 20 the closer to described main gate line 10 time, due to collecting of electric current, larger by the electric current of described secondary grid line 20.Therefore, by the width of the width of described secondary grid line 20 on top edge be generally the width of lower limb 1-20 doubly, the area of described solar battery sheet is larger, and width is longer, and multiple is larger.And the width of secondary grid line 20 diminishes, the extinction area of described solar battery sheet can be increased, improve optical energy utilization efficiency, improve the power of the assembly be made into.
The width of described secondary grid line 20 broadens gradually from lower limb to top edge.The width of described secondary grid line 20 broadens gradually from lower limb to top edge, and make when making, make continuously, technique becomes simple.
On the basis of above-described embodiment, in a kind of embodiment of the present utility model, the width of described secondary grid line 20 fades to 120 μm by 60 μm from lower limb to top edge.Because the specification of the solar battery sheet generally produced is determined, length and width are all determined.The width of described secondary grid line 20 fades to 120 μm by 60 μm from lower limb to top edge, both ensure that the ability by electric current and the intensity of described secondary grid line 20, has not increased technology difficulty again.It should be noted that, above-mentioned size is a specific embodiment, it is a conventional experience size, in the utility model, be not decreased through the ability of electric current, when not increasing technology difficulty, the width of described secondary grid line 20 can also be other size, and the utility model does not do concrete restriction to this.
And for described thin grid line, many described thin grid lines are equidistantly arranged.Described thin grid line is equidistantly arranged, and when carrying out the arranging of described thin grid line, the adjustment of technological parameter becomes simple.
On the basis of above-described embodiment, in a kind of embodiment of the present utility model, the quantity of described thin grid line is six, the width of many described thin grid lines from the close-by examples to those far off becomes arithmetic progression to successively decrease successively from the spacing of described main gate line 10, the width of the described thin grid line nearest apart from described main gate line 10 is 110 μm, is 60 μm apart from the width of described main gate line 10 described thin grid line farthest.The width of described thin grid line and the distance of described main gate line 10 larger, width is less.Current distance draws near from described main gate line 10, and electric current collects, and is also changed from small to big accordingly by the electric current of described thin grid line, and the width of described thin grid line is elongated gradually.Otherwise, arithmetic progression is from the close-by examples to those far off become to successively decrease successively from the width of many described thin grid lines from the spacing of described main gate line 10, the width of the described thin grid line nearest apart from described main gate line 10 is 110 μm, is 60 μm apart from the width of described main gate line 10 described thin grid line farthest.The width of described thin grid line becomes arithmetic progression, and the setting of technological parameter becomes very simple.It should be noted that, the utility model is to the quantity of described thin grid line, and the width of described thin grid line is not specifically limited.
The drift angle place of described front electrode is provided with chamfering.The drift angle place of described front electrode is provided with chamfering, places fast or take off described solar battery sheet when convenient installation or maintenance.Generally, the chamfering of the drift angle setting of described front electrode is the chamfering of 1mm45 °, and described back electrode 30 and described back of the body electric field structure also can arrange the chamfering of 1mm45 °.It should be noted that, the utility model is not specifically limited described chamfering.
On the basis of above-described embodiment, in a kind of embodiment of the present utility model, the top edge of described back electrode 30 has laciniation.The electric current passed through due to described back electrode 30 is comparatively large, and temperature is higher.Described back electrode 30 surface is designed to zigzag, back electrode 30 is made to be separated into little individuality (back electrode 30 itself is an entirety) one by one by the part that back of the body electric field covers, and on back electrode 30, devise near the place at back electrode 30 edge the aperture that some reduce stress, object is that the impact of the coefficient of expansion on back electrode 30 of back of the body electric field is dropped to bottom line, thus avoid the crack performance produced because back of the body electric field is different from the coefficient of expansion of back electrode 30, improve reliability and the qualification rate of described solar battery sheet.
In sum, it is stacked that described solar battery structure makes the main grid of positive electrode and back electrode directly contact in the process making assembly, thus eliminate use welding connection front and the back side, decreases the use amount of welding, decrease shading-area, improve component power; There is a part of overlapping region between adjacent described solar battery sheet, improve the area ratio of the absorption sunlight of assembly, also namely improve the absorption efficiency of sunlight, improve component power.
Above solar battery structure provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and execution mode, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection range of the utility model claim.
Claims (10)
1. a solar battery structure, it is characterized in that, comprise solar battery sheet, the front of described solar battery sheet is provided with front electrode, the back side of described solar battery sheet is provided with back electrode and back of the body electric field structure, wherein, described front electrode comprises main gate line, many secondary grid lines vertical with described main gate line and many parallel with described main gate line thin grid lines, and described main gate line is positioned at the top edge of described solar battery sheet; Described back electrode is positioned at the lower limb of described solar battery sheet, and parallel with described main gate line; The region of described back of the body electric field structure is overlapping with the area part of described back electrode, and main gate line and the back electrode of adjacent described solar battery sheet are stacked.
2. solar battery structure as claimed in claim 1, it is characterized in that, described main gate line is the main gate line of hollow out.
3. solar battery structure as claimed in claim 2, it is characterized in that, the quantity of described main gate line is many.
4. solar battery structure as claimed in claim 1, is characterized in that, the width of the width of described secondary grid line on top edge be the width of lower limb 1-20 doubly.
5. solar battery structure as claimed in claim 4, it is characterized in that, the width of described secondary grid line broadens gradually from lower limb to top edge.
6. solar battery structure as claimed in claim 5, it is characterized in that, the width of described secondary grid line fades to 120 μm by 60 μm from lower limb to top edge.
7. solar battery structure as claimed in claim 1, it is characterized in that, many described thin grid lines are equidistantly arranged.
8. solar battery structure as claimed in claim 7, it is characterized in that, the quantity of described thin grid line is six, the width of many described thin grid lines from the close-by examples to those far off becomes arithmetic progression to successively decrease successively from the spacing of described main gate line, the width of the described thin grid line nearest apart from described main gate line is 110 μm, is 60 μm apart from the width of described main gate line described thin grid line farthest.
9. the solar battery structure as described in any one of claim 1-8, is characterized in that, the drift angle place of described front electrode is provided with chamfering.
10. solar battery structure as claimed in claim 9, it is characterized in that, the top edge of described back electrode has laciniation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520420690.6U CN204651330U (en) | 2015-06-17 | 2015-06-17 | A kind of solar battery structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520420690.6U CN204651330U (en) | 2015-06-17 | 2015-06-17 | A kind of solar battery structure |
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| CN204651330U true CN204651330U (en) | 2015-09-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016188146A1 (en) * | 2015-05-22 | 2016-12-01 | 苏州沃特维自动化***有限公司 | Preparation method for solar cell piece unit and solar cell module |
| CN108963020A (en) * | 2017-05-27 | 2018-12-07 | 苏州沃特维自动化***有限公司 | A kind of solar battery sheet screening structure and photovoltaic module |
-
2015
- 2015-06-17 CN CN201520420690.6U patent/CN204651330U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016188146A1 (en) * | 2015-05-22 | 2016-12-01 | 苏州沃特维自动化***有限公司 | Preparation method for solar cell piece unit and solar cell module |
| CN108963020A (en) * | 2017-05-27 | 2018-12-07 | 苏州沃特维自动化***有限公司 | A kind of solar battery sheet screening structure and photovoltaic module |
| CN108963020B (en) * | 2017-05-27 | 2024-03-22 | 苏州沃特维自动化***有限公司 | Solar cell arranging structure and photovoltaic module |
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