CN202307911U - Back electrode of solar battery - Google Patents
Back electrode of solar battery Download PDFInfo
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- CN202307911U CN202307911U CN2011204225307U CN201120422530U CN202307911U CN 202307911 U CN202307911 U CN 202307911U CN 2011204225307 U CN2011204225307 U CN 2011204225307U CN 201120422530 U CN201120422530 U CN 201120422530U CN 202307911 U CN202307911 U CN 202307911U
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Abstract
The utility model provides a back electrode of a solar battery, belonging to the technical field of electrical science and solving the problem of resource waste caused by unreasonable layout of back electrodes of the existing solar battery. The back electrode of the solar battery, provided by the utility model, comprises a back electric field and a plurality of back electrodes, wherein the back electric field covers the periphery of the back electrodes. The back electrode of the solar battery is characterized in that each back electrode is of a strip-shaped structure and comprises a plurality of width part electrodes and a plurality of narrow part electrodes which are arranged alternately at intervals with different thicknesses. A part of back electrodes are narrowed, the area of the back electrode is reduced, the area of the back electric field is correspondingly increased, not only can the performances of the solar battery be improved, but also the using amount of silver paste is lowered, and the cost is lowered; and the full utilization of the back electrode and the back electric field of the solar cell can be realized, and the resource waste is avoided.
Description
Technical field
The utility model belongs to the electroporation field, relates to the back electrode of a kind of solar cell, particularly a kind of solar cell.
Background technology
Solar cell generally is that basic material makes with silicon, and the electrode that is positioned at rear surface of solar cell is a back electrode, and the conductive layer that is positioned at the rear surface of solar cell overwhelming majority is a back of the body electric field.Back electrode of solar cell is positioned at the back side of solar cell, forms the bottom electrode of silion cell, and matches with the top electrode on silion cell surface, plays the electric energy that solar cell is produced and sends extraneous effect to.Form through printing, oven dry, sintering by silver-colored aluminium paste or silver slurry as the back of the body auxiliary electrode.Chinese patent (the patent No.: 200620157730.3) disclose a kind of network-like crystal silicon solar battery back electric field; Comprise back electrode and back of the body electric field; Said back of the body electric field is interconnected by a plurality of junior unit back of the body electric fields forms a network-like integral body, and each junior unit back of the body electric field all is connected with other junior unit back of the body electric fields adjacent with it through node.Though this structure can improve Solar cell performance to a certain extent, because its back electrode is thick excessively, the rayed that can be seen through by the front near the edge around it, but, caused waste because it is designed to back electrode and can not generates electricity.Simultaneously the zone at the two ends of back electrode since its some because blocking of front electrode can't accept transmitted light, can not accomplish sufficient utilization to solar cell equally, caused the wasting of resources.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, has proposed a kind of back electrode of solar cell simple in structure, and it can realize the making full use of of the back electrode of solar cell and back of the body electric field avoided the wasting of resources.
The purpose of the utility model can realize through following technical proposal: a kind of back electrode of solar cell; Comprise back of the body electric field and some back electrodes; Described back of the body electric field cover back electrode around; It is characterized in that described back electrode is a list structure, comprise several wide electrode and several narrow electrode that thickness is arranged alternately at interval.
The utility model is handled the part back electrode through constriction, reduced the area of back electrode, and the corresponding area that increases back of the body electric field promptly can improve Solar cell performance, can reduce the use amount of silver slurry again, reduces cost.And the setting of thick portion can be used for the engaged test probe, and collected current test more accurately, and its bigger relatively width can be so that the welding during the making photovoltaic module be more convenient simultaneously.
In above-mentioned back electrode of solar cell, be set to auxiliary electrode between the end at described back electrode two ends and the edge of solar cell.The zone at back electrode two ends by original Quan Beichang, is become the part back of the body, and this part back of the body field energy is accepted transmitted light, increases energy output.And the combination property of battery can effectively improve because blocking of front electrode can not receive light, thereby this position is made as auxiliary electrode in this place.
In above-mentioned back electrode of solar cell, described auxiliary electrode is set to narrow electrode.Because the end of auxiliary electrode is positioned at the edge of solar cell.The uneven illumination of solar energy edge is even, and scope is less relatively, and narrow electrode is set in this position, more is satisfied with the optimal design of battery.
In above-mentioned back electrode of solar cell, described auxiliary electrode is made as the triangle arrow shape.The tip place of this auxiliary electrode and the edge of solar cell offset, and its thick head place is connected with the thick portion of back electrode.
In above-mentioned back electrode of solar cell, the width of described wide electrode is 2.8mm～3.2mm, and the width of described narrow electrode is 1.3mm～1.7mm.
In above-mentioned back electrode of solar cell, the bar number of described back electrode is 2.
In above-mentioned back electrode of solar cell, described back electrode is arranged on the left and right sides of rear surface of solar cell symmetrically.
Compared with prior art; The utility model has carried out optimization process to original back electrode structure; Back electrode is designed to the list structure that thickness is arranged alternately at interval, and its two ends are set to narrow electrode of triangle arrow shape simultaneously, promptly can increase energy output; Can avoid the wasting of resources again, reduce production costs.
Description of drawings
Fig. 1 is the back electrode structural representation of solar cell in the prior art.
Fig. 2 is the structural representation of the utility model.
Among the figure, 1, the back of the body electric field; 2, back electrode; 2a, wide electrode; 2b, narrow electrode; 2c, auxiliary electrode.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technical scheme of the utility model is done further to describe, but the utility model is not limited to these embodiment.
With reference to Fig. 1; Be illustrated as the back electrode structure of solar cell in the prior art; Comprise the back of the body electric field 1 and 2 back electrodes 2, carry on the back electric field 1 cover back electrode 2 around, back electrode 2 be the list structure of even thickness; And the edge of its two ends and solar cell has a space, and this zone is made as back of the body electric field.Because some is because blocking of front electrode can't accept transmitted light, if it is designed to back electrode, with the optimization that is more conducive to battery.
With reference to Fig. 2, be illustrated as the back electrode structure of solar cell in the present embodiment, comprise back of the body electric field 1 and 2 back electrodes 2; The back of the body electric field 1 cover back electrode 2 around; Back electrode 2 is a list structure, comprises 6 wide electrode 2a and 5 narrow electrode 2b that thickness is arranged alternately at interval, and the auxiliary electrode 2c that is positioned at the triangle arrow shape at two ends; The tip place of this auxiliary electrode 2c and the edge of solar cell offset, and its thick head place is connected with the thick portion of back electrode.The width range of wide electrode 2a is 2.8mm～3.2mm in the present embodiment, and the width range of narrow electrode 2b is 1.3mm～1.7mm.The width of wide electrode 2a is bigger, the welding operation of carrying out when can be convenient to make photovoltaic module, and it can be used for the engaged test probe simultaneously, and collected current makes that test is more accurate.Narrow electrode 2b made the zone that it was positioned at into back of the body field by backplane, makes transmitted light can shine this zone, helps to improve the generating rate of solar cell.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although this paper has used terms such as back of the body electric field 1, back electrode 2, wide electrode 2a, narrow electrode 2b, auxiliary electrode 2c morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (7)
1. the back electrode of a solar cell; Comprise back of the body electric field (1) and some back electrodes (2); Described back of the body electric field (1) cover back electrode (2) around; It is characterized in that described back electrode (2) is a list structure, comprise several wide electrodes (2a) and several narrow electrodes (2b) that thickness is arranged alternately at interval.
2. the back electrode of solar cell according to claim 1 is characterized in that, is set to auxiliary electrode (2c) between the end at described back electrode (2) two ends and the edge of solar cell.
3. the back electrode of solar cell according to claim 2 is characterized in that, described auxiliary electrode (2c) is set to narrow electrode (2b).
4. the back electrode of solar cell according to claim 2 is characterized in that, described auxiliary electrode (2c) is made as the triangle arrow shape.
5. the back electrode of solar cell according to claim 1 is characterized in that, the width of described wide electrode (2a) is 2.8mm～3.2mm, and the width of described narrow electrode (2b) is 1.3mm～1.7mm.
6. according to the back electrode of claim 1 or 2 or 3 or 4 or 5 described solar cells, it is characterized in that the bar number of described back electrode (2) is 2.
7. the back electrode of solar cell according to claim 6 is characterized in that, described back electrode (2) is arranged on the left and right sides of rear surface of solar cell symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204225307U CN202307911U (en) | 2011-10-31 | 2011-10-31 | Back electrode of solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204225307U CN202307911U (en) | 2011-10-31 | 2011-10-31 | Back electrode of solar battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202307911U true CN202307911U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204225307U Expired - Fee Related CN202307911U (en) | 2011-10-31 | 2011-10-31 | Back electrode of solar battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202307911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107927A1 (en) * | 2015-12-23 | 2017-06-29 | Byd Company Limited | Back contact solar cell substrate, method of manufacturing the same and back contact solar cell |
-
2011
- 2011-10-31 CN CN2011204225307U patent/CN202307911U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107927A1 (en) * | 2015-12-23 | 2017-06-29 | Byd Company Limited | Back contact solar cell substrate, method of manufacturing the same and back contact solar cell |
| CN106910782A (en) * | 2015-12-23 | 2017-06-30 | 比亚迪股份有限公司 | Back contact solar cell piece and preparation method thereof and back contact solar cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20151031 |
|
| EXPY | Termination of patent right or utility model |