CN203118975U - Welding strip used for back-contact solar cell - Google Patents
Welding strip used for back-contact solar cell Download PDFInfo
- Publication number
- CN203118975U CN203118975U CN 201320039823 CN201320039823U CN203118975U CN 203118975 U CN203118975 U CN 203118975U CN 201320039823 CN201320039823 CN 201320039823 CN 201320039823 U CN201320039823 U CN 201320039823U CN 203118975 U CN203118975 U CN 203118975U
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- Prior art keywords
- hole
- welding
- solar cell
- contact solar
- welding strip
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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 welding strip used for a back-contact solar cell, which comprises a conductive welding strip body. Hollowed holes corresponding to through holes of the back-contact solar cell one by one are arranged on the conductive welding strip body positions corresponding to the positions of the back-contact solar cell through holes. The area of each hollowed hole is larger than that of each through hole. The through holes are thus exposed out of the hollowed holes. The novel welding strip used for the back-contact solar cell is developed. The hollowed holes are arranged on the welding strip in advance. During a welding process, hole metal electrodes are located inside the hollowed holes of the welding strip. In other words, the welding points will not cover the hole metal electrodes. The influence of stress on the hole metal electrodes during welding and laminating processes is thus prevented. The cell and an assembly are enabled to increase the power and enhance the stability and the reliability. Obvious effects are achieved. The welding strip used for the back-contact solar cell has great significance.
Description
Technical field
The utility model relates to a kind of welding for back contact solar cell, belongs to technical field of solar.
Background technology
Along with the extensive use of solar module, photovoltaic generation more and more occupies important proportion in new forms of energy, obtained develop rapidly.Yet with respect to traditional energy, the cost of electricity-generating of photovoltaic generation is still higher.In order further to reduce cost, a kind of important mode is to adopt high-efficiency battery, high-efficiency battery can produce more electric power in unit are, thereby having reduced expensive silicon material uses, and reduced the shared erection space of system component, thereby improved income on the whole, reduced the cost of photovoltaic generation.
Back contact solar cell is one of most important high-efficiency battery that at present can large-scale production.Compare with common crystal silicon solar energy battery, the positive pole of back contact solar cell and negative pole all are located at the back side of battery sheet, and both positive and negative polarity connects by welding, and welding does not have the shading influence to the battery sheet, thereby can reduce the shading of battery sheet, improve the conversion efficiency of battery sheet.
Existing back contact solar cell comprises front electrode and back electrode, and the battery sheet is provided with through hole, is provided with electrocondution slurry in the through hole, forms the mesoporous metal electrode, thereby front electrode is guided to the back side.Existing welding generally is strip, during welding, directly welding is located at the back side of battery sheet and is welded; Yet, the pad of above-mentioned welding will cover the through hole region usually, thereby the stress that pad produces in welding, lamination process can cause damage to the mesoporous metal electrode in the hole, the final series resistance that increases battery, influence the collection of charge carrier, grievous injury the performance of battery, and influence power, stability and the reliability of assembly.
Summary of the invention
The utility model purpose provides a kind of welding for back contact solar cell.
For achieving the above object, the technical solution adopted in the utility model is: a kind of welding for back contact solar cell, comprise a conduction welding body, be provided with and through hole hollow hole one to one with respect to the position of back contact solar cell sheet through hole on the described conduction welding body; The area of described hollow hole makes through hole expose hollow hole greater than through hole.
Above, described conduction welding body can adopt prior art, for example the oxygen-free copper stripe of electroplating surfaces with tin.
The effect of described hollow hole is the through hole that holds the battery sheet, mesoporous metal electrode during welding in the through hole of back contact solar cell is positioned at the hollow out zone of welding, thereby prevent that the mesoporous metal electrode in the through hole from being covered by welding when welding, thereby avoided the generation of stress, and to the damage of mesoporous metal electrode.
Described hollow hole defaults on the welding, and its position is the position corresponding with the through hole of back contact solar cell sheet, and this position can accurately be obtained by the position of through hole.
Described hollow hole can be that random geometries such as rectangle, triangle, circle, polygon constitute.
In the technique scheme, described hollow hole is rounded, and it is concentric with through hole.
In the technique scheme, the semidiameter of described hollow hole and through hole is 0.1 ~ 3 mm.
Because the employing of technique scheme compared with prior art, the utlity model has following advantage:
1. the utility model has been developed a kind of new welding that is specifically designed to back contact solar cell, be preset with hollow hole on the welding, the mesoporous metal electrode is positioned at the hollow hole of welding during welding, it is not coverage hole metal electrode of pad, avoided stress in welding, the lamination process to the influence of mesoporous metal electrode, improve power, stability and the reliability of battery and assembly, obtained significant effect, had active operation significance.
2. of the present utility model rational in infrastructure, have stronger versatility, be applicable to that single face is subjected to light to contact solar cell with the two-sided light back of the body that is subjected to.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the use schematic diagram of the utility model embodiment one;
Fig. 3 is the partial schematic diagram that comprises welding and through hole among Fig. 2.
Wherein: 1, conduction welding body; 2, through hole; 3, hollow hole.
Embodiment
Be further described below in conjunction with the utility model of embodiment:
Embodiment one
Shown in Fig. 1 ~ 3, a kind of welding for back contact solar cell comprises a conduction welding body 1, is provided with and through hole hollow hole 3 one to one with respect to the position of back contact solar cell sheet through hole 2 on the described conduction welding body; The area of described hollow hole makes through hole expose hollow hole greater than through hole.
Described hollow hole is rounded, and it is concentric with through hole.
Welding is made of the electroplating surfaces with tin of copper strip, and welding is provided with circular hollow hole.
Schematic diagram when accompanying drawing 2 ~ 3rd, the utility model use, Fig. 3 just are used for illustrating the relative position of through hole 2 and hollow hole 3, and the through hole 2 of back contact solar cell sheet is positioned at the central area of the hollow hole 3 of welding when namely welding; When actual welding, through hole is covered by the mesoporous metal electrode, thereby through hole is sightless.
Claims (3)
1. a welding that is used for back contact solar cell comprises a conduction welding body (1), it is characterized in that: be provided with and through hole hollow hole (3) one to one with respect to the position of back contact solar cell sheet through hole (2) on the described conduction welding body; The area of described hollow hole makes through hole expose hollow hole greater than through hole.
2. the welding for back contact solar cell according to claim 1, it is characterized in that: described hollow hole is rounded, and it is concentric with through hole.
3. the welding for back contact solar cell according to claim 2, it is characterized in that: the semidiameter of described hollow hole and through hole is 0.1 ~ 3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320039823 CN203118975U (en) | 2013-01-24 | 2013-01-24 | Welding strip used for back-contact solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320039823 CN203118975U (en) | 2013-01-24 | 2013-01-24 | Welding strip used for back-contact solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203118975U true CN203118975U (en) | 2013-08-07 |
Family
ID=48899294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320039823 Expired - Lifetime CN203118975U (en) | 2013-01-24 | 2013-01-24 | Welding strip used for back-contact solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203118975U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037365A (en) * | 2018-08-03 | 2018-12-18 | 浙江爱旭太阳能科技有限公司 | Perforation single side imbrication solar cell module and preparation method |
| WO2021077786A1 (en) * | 2019-10-21 | 2021-04-29 | 泰州隆基乐叶光伏科技有限公司 | Strip-shaped welding strip |
-
2013
- 2013-01-24 CN CN 201320039823 patent/CN203118975U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037365A (en) * | 2018-08-03 | 2018-12-18 | 浙江爱旭太阳能科技有限公司 | Perforation single side imbrication solar cell module and preparation method |
| WO2021077786A1 (en) * | 2019-10-21 | 2021-04-29 | 泰州隆基乐叶光伏科技有限公司 | Strip-shaped welding strip |
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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: 20130807 |
|
| CX01 | Expiry of patent term |