CN203260607U - MWT (metallization wrap through) or EWT (emitter wrap through) solar cell module - Google Patents
MWT (metallization wrap through) or EWT (emitter wrap through) solar cell module Download PDFInfo
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- CN203260607U CN203260607U CN 201320322030 CN201320322030U CN203260607U CN 203260607 U CN203260607 U CN 203260607U CN 201320322030 CN201320322030 CN 201320322030 CN 201320322030 U CN201320322030 U CN 201320322030U CN 203260607 U CN203260607 U CN 203260607U
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- contact electrode
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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 provides an MWT (metallization wrap through) or EWT (emitter wrap through) solar cell module. The solar cell module comprises a series welding cell sheet which includes a plurality of cell sheets arranged in order. The back side of the cell sheet is provided with M positive contact electrode arrays which are formed by positive contact points in a first array and with N negative contact electrode arrays which are formed by negative contact points in a second array. A first cell sheet and a second cell sheet are set to be adjacent cell sheets, and at least one positive contact electrode array of the first cell sheet and at least one negative contact electrode array of the second cell sheet are on the same straight line, wherein the positive contact electrode array and the negative contact electrode array on the same straight line are connected by a solder strip. According to the solar cell module of the utility model, the quantity of the solder strip is reduced; the frequency of the cutting solder strip is reduced; the preparation method of the MWT or EWT solar cell module is simplified; and the production efficiency of the MWT or EWT solar cell module is improved.
Description
Technical field
The utility model relates to technical field of solar cells, and more particularly, the utility model relates to a kind of MWT or EWT solar module.
Background technology
Metal piercing coiling (metallizaiton wrap through, MWT) battery is the battery that a kind of negative pole contact electrode and anodal contact electrode all are positioned at cell backside.In the MWT battery structure, the contact electrode that is positioned at the battery front side negative pole passes the silicon chip matrix and is directed to silicon chip back side, and negative pole collected electric current in front is flowed out by the back side of battery.Compare with conventional solar cell, reduced the shading-area of battery front side, effectively increased the short circuit current of cell piece, thereby energy content of battery conversion efficiency is improved.
Perforated anode coiling (emitter wrap through, EWT) battery is a kind of front knot back of the body contact battery.Its PN junction still is positioned at the front of battery, to be conducive to improve the collection efficiency of charge carrier, hole by heavily spreading or be coated with metal (the maximum of usefulness are laser drilling at present) links together battery front side emitter region and back side local emission district, the back side is introduced in the front surface emitter region, the electrical conductivity that front and rear surfaces is collected in realization is on backplate, the whole cross arrangements of the thin grid of positive and negative electrode are at cell backside, and main grid is arranged in the both sides of cell backside.Front surface still adopts good pyramid structure and antireflective coating, to reduce the reflection of light loss.
MWT battery or EWT battery are because the advantage of himself causes people's concern.But present most of MWT or EWT battery component need to be realized connection in series-parallel between cell piece by conductive backings, and the use of conductive backings causes the cost of MWT or EWT battery component higher, has limited a large amount of uses of this battery component.
In addition, need to weld at present the welding of a large amount of different sizes with the preparation method of the MWT of common backboard or EWT solar module, so that the preparation method is comparatively complicated, be unfavorable for enhancing productivity.
The utility model content
In view of this, the utility model provides a kind of MWT or EWT solar module, with the technical problem of preparation method's complexity of overcoming above-mentioned MWT or EWT solar module.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
A kind of MWT or EWT solar module, comprise the series welding cell piece, described series welding cell piece comprises a plurality of cell pieces that are arranged in order, the M that the back side of described cell piece is provided with the anodal contact point composition that is the first array arrangement is listed as the N row negative pole contact electrode row that anodal contact electrode was listed as and was the negative pole contact point composition of the second array arrangement, set each other adjacent cell sheet of the first cell piece and the second cell piece, wherein, the described negative pole contact electrode row of at least one row of the described anodal contact electrode row of at least one row of described the first cell piece and described the second cell piece are located on the same line, and the described anodal contact electrode that is located on the same line row and be connected negative pole contact electrode row with a welding connection, wherein, M, N is natural number.
Preferably, all negative pole contact electrode row of the described anodal contact electrode row of all of described the first cell piece and described the second cell piece are located on the same line, and described M and N equate.
Preferably, the described anodal contact electrode of described series welding cell piece is listed as by the first welding draws, and the described negative pole contact electrode of described series welding cell piece is listed as by the second welding draws.
Preferably, described series welding cell piece comprises the described anodal contact electrode row of at least 2 row and the described negative pole contact electrode row of at least 2 row, and described the first welding connects the first convergent belt, and described the second welding connects the second convergent belt.
Preferably, described negative pole contact point is directed to cell backside by boring a hole from the front of battery, and the straight line that is listed as all corresponding described perforation places a described negative pole contact is printed with insulating cement or is provided with insulation strip.
Preferably, described M and N respectively are 1～5.
Preferably, described series welding cell piece comprises 2～10 cell pieces.
The series welding cell piece of MWT of the present utility model or EWT solar module comprises a plurality of cell pieces that are arranged in order, and the back side of each cell piece is provided with M and is listed as anodal contact electrode row and N row negative pole contact electrode row.Set the first cell piece and the second cell piece and be the adjacent cell sheet in the series welding cell piece, wherein, at least one row negative pole contact electrode row on the anodal contact electrode row of at least one row on the first cell piece and the second cell piece are positioned on the straight line, and these positive and negative electrode contact electrode row that are positioned on the straight line can directly couple together it with a welding.Adjacent anodal contact electrode row of cell piece the first cell piece and the negative pole contact electrode row of cell piece of being connected all need a plurality of weldings to realize the technical scheme of connections in the prior art, the utility model has reduced the quantity of welding, reduced the number of times that cuts the welding operation, simplify the preparation method of MWT or EWT solar module, improved the production efficiency of MWT or EWT solar module.
Description of drawings
In order to be expressly understood the technical solution of the utility model, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those skilled in the art, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structure schematic diagram of the cell piece of the utility model embodiment;
Fig. 2 is the structure schematic diagram of the series welding cell piece of the utility model embodiment.
Embodiment
Below in conjunction with embodiment shown in the drawings the utility model is described in detail; but these execution modes do not limit the utility model, and the conversion on the structure that those of ordinary skill in the art makes according to these execution modes, method or the function all is included in the protection range of the present utility model.
The MWT that the utility model provides or EWT solar module comprise glass, EVA, series welding cell piece and back veneer material, and according to described above arranged sequentially and consist of through lamination and encapsulation.Improvement of the present utility model is the series welding cell piece, the structure of other assembly is with of the prior art identical, for the purpose of concise and to the point, present embodiment is that the series welding cell piece is described in detail to improvement of the present utility model only, other assembly those skilled in the art can obtain at an easy rate according to common practise and the conventional techniques means of this area, no longer describe at this.
Anodal contact electrode row in the prior art on cell piece of adjacent cell sheet of the series welding cell piece (being arranged in a plurality of cell pieces on the straight line) of the MWT of the common backboard of use or EWT battery component and the negative pole contact electrode row existence on another cell piece misplace, all not point-blank, with welding of battery film the time, at first the anodal contact electrode row on the cell piece on the adjacent cell sheet and the negative pole contact electrode row on the another one cell piece are welded with a welding respectively, and then realize the connection of two weldings that both positive and negative polarity contact electrode described above lists with the another one connection welding belt.Because generally can comprise a plurality of (being generally 10) cell piece in a series welding cell piece, each series welding cell piece will need to use the welding of many different sizes like this.And a battery component generally includes a plurality of series welding cell pieces, when all cell pieces are realized series connection, needs more weldings.The structure of this MWT or EWT solar module causes when the batch production solar module, need to cut the welding of different size, and then weld accordingly.Thereby so that this method for preparing battery component is comparatively complicated.
In order to reduce the problem of the quantity of welding on the series welding cell piece as far as possible, the utility model proposes a kind of MWT or EWT solar module, positive and negative electrode contact electrode row on the adjacent cell sheet on the series welding cell piece of this MWT or EWT solar module are positioned on the straight line, and these positive and negative electrode contact electrode row that are positioned on the straight line can couple together by same welding.Particularly, see also the following examples.
Fig. 1 is the structure schematic diagram of the cell piece of the utility model embodiment.The back side of this cell piece be provided with anodal contact point be 2x3 array (the first array) arrange form the anodal contact electrode row 11 of 2 row, the back side of this cell piece also is provided with the negative pole contact point and is the 2 row negative pole contact electrode row 12 that 2x4 array (the second array) is arranged and formed.This positive pole contact electrode row and negative pole contact electrode be listed in the position at this cell piece back side satisfied when this cell piece behind its center Rotate 180 °, postrotational anodal contact electrode row are positioned at the position at the negative pole contact electrode row place before the rotation, and postrotational negative pole contact electrode row are positioned at the position at the anodal contact electrode row place before the rotation.
Need to prove that the back side of actual cell piece does not have the dotted line 10 shown in Fig. 1, the dotted line of Fig. 1 is to be positioned on the straight line for an electrode contact point range of expressing visually.
Need to prove that the utility model does not limit the first array on the cell piece and the concrete form of the second array, first row row and 2x4 the second array of the 2x3 of Fig. 1 example only are examples, can not be interpreted as the restriction to present embodiment.In fact, the first array and the second array all can be arbitrary array.Be number and the arrangement that present embodiment does not limit anodal contact point and the negative pole contact point of single battery sheet.Specifically, the columns M that the anodal contact electrode that is comprised of anodal contact point is listed as and the columns N that is listed as by the negative pole contact electrode that the negative pole contact point forms can be random natural number, and the number of the contact point that each contact electrode lists does not limit yet, and can be more than one contact point.Generally, M and N are the natural number in 1～5 interval.In addition, preferred for convenient this cell piece of welding forms the series welding cell piece, M and N equate that namely the anodal contact electrode row on each cell piece are identical with the number of negative pole contact electrode row.
The structure schematic diagram of Fig. 2 series welding cell piece that to be the utility model embodiment be comprised of cell piece described above.This series welding cell piece can comprise a plurality of single battery sheets, is specifically as follows 2～10 cell pieces.The series welding cell piece of Fig. 2 example comprises 4 cell pieces, for convenience of description, these 4 cell pieces is numbered, and is followed successively by from top to bottom the first, second, third and the 4th cell piece.As can be seen from Figure 2, the first cell piece and the second cell piece, the second cell piece and the 3rd cell piece and the 3rd cell piece and the 4th cell piece adjacent cell sheet each other.In order to reduce the quantity of welding, the initial placement direction that present embodiment is set these four cell pieces is consistent, then with the first and the 3rd cell piece or the second and the 4th cell piece respectively behind its center Rotate 180 °, anodal contact electrode row 11 on the cell piece of adjacent cell sheet and negative pole contact electrode row 12 on another cell piece are positioned on the straight line.Since when forming the series welding cell piece, need to be with the series connection of the row of the positive and negative electrode contact electrode on the adjacent electrode sheet.With a welding 13 the anodal contact electrode row on cell piece on the adjacent cell sheet and the negative pole contact electrode on the another one cell piece are listed as in the present embodiment and are together in series.In prior art, the positive and negative electrode contact electrode row of adjacent cell sheet are not point-blank, need many weldings that it is together in series, present embodiment has reduced the quantity of welding, reduced the number of times that cuts welding, simplified the method for preparing the series welding cell piece, be conducive to enhance productivity.
It is pointed out that Fig. 2 illustrates the anodal contact electrodes row of all of a cell piece of the adjacent cell sheet on this series welding cell piece and all alignment of negative pole contact electrodes row on another cell piece, all is positioned on the straight line.It is minimum that this structure can reduce to the quantity of welding, so that it is the simplest to prepare the method for solar module, can farthest enhance productivity.In addition; as long as the structure that an anodal contact electrode on the cell piece on the series welding cell piece at least one pair of adjacent cell sheet of existence and the negative pole contact electrode on another cell piece are positioned on the straight line can reduce welding quantity; simplify the method prepare solar module, so these structures are all at the row of protection of the present utility model.
The anodal contact electrode row of the series welding cell piece in the present embodiment can be drawn by the first welding 131, and negative pole contact electrode row can have the second welding 132 to draw.When the single battery sheet of series welding cell piece comprises at least 2 anodal contact electrode row 11 of row and at least 2 row negative pole contact electrode row 12, then the first welding 131 connections the first convergent belt 141, the second weldings connect the second convergent belt 142.
Need to prove that the negative pole contact point 121 in the negative pole contact electrode row 12 of cell piece is directed to cell backside by perforation by the front of battery.In order to prevent the short circuit of anodal contact point and negative pole contact point, need to do insulation in perforation place of negative pole contact point 121 and process, form insulation system.Present embodiment adopts following methods to realize the insulation of anodal contact point and negative pole contact point: method is that the straight line at all perforation places of negative pole contact electrode row is provided with an insulation strip, have the opening corresponding with the negative pole contact point on this insulation strip, this opening can be realized being electrically connected of negative pole contact point and welding.The another one method is the straight line printing last layer insulating cement at all perforation places of negative pole contact electrode row, realizes the insulation of negative pole contact point and anodal contact point.
The above only is embodiment of the present utility model; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (7)
1. a MWT or EWT solar module, comprise the series welding cell piece, described series welding cell piece comprises a plurality of cell pieces that are arranged in order, the M that the back side of described cell piece is provided with the anodal contact point composition that is the first array arrangement is listed as the N row negative pole contact electrode row that anodal contact electrode was listed as and was the negative pole contact point composition of the second array arrangement, it is characterized in that, set each other adjacent cell sheet of the first cell piece and the second cell piece, wherein, the described negative pole contact electrode row of at least one row of the described anodal contact electrode row of at least one row of described the first cell piece and described the second cell piece are located on the same line, and the described anodal contact electrode that is located on the same line row and be connected negative pole contact electrode row with a welding connection, wherein, M, N is natural number.
2. solar module according to claim 1 is characterized in that, all negative pole contact electrode row of the described anodal contact electrode row of all of described the first cell piece and described the second cell piece are located on the same line, and described M and N equate.
3. solar module according to claim 1 and 2 is characterized in that, the described anodal contact electrode of described series welding cell piece is listed as by the first welding draws, and the described negative pole contact electrode of described series welding cell piece is listed as by the second welding draws.
4. solar module according to claim 3, it is characterized in that, described series welding cell piece comprises the described anodal contact electrode row of at least 2 row and the described negative pole contact electrode row of at least 2 row, and described the first welding connects the first convergent belt, and described the second welding connects the second convergent belt.
5. solar module according to claim 1 and 2, it is characterized in that, described negative pole contact point is directed to cell backside by boring a hole from the front of battery, and the straight line that is listed as all corresponding described perforation places a described negative pole contact is printed with insulating cement or is provided with insulation strip.
6. solar module according to claim 1 and 2 is characterized in that, described M and N respectively are 1～5.
7. solar module according to claim 1 and 2 is characterized in that, described series welding cell piece comprises 2～10 cell pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320322030 CN203260607U (en) | 2013-06-05 | 2013-06-05 | MWT (metallization wrap through) or EWT (emitter wrap through) solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320322030 CN203260607U (en) | 2013-06-05 | 2013-06-05 | MWT (metallization wrap through) or EWT (emitter wrap through) solar cell module |
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| Publication Number | Publication Date |
|---|---|
| CN203260607U true CN203260607U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320322030 Expired - Lifetime CN203260607U (en) | 2013-06-05 | 2013-06-05 | MWT (metallization wrap through) or EWT (emitter wrap through) solar cell module |
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| CN (1) | CN203260607U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876486A (en) * | 2017-03-24 | 2017-06-20 | 乐叶光伏科技有限公司 | The group string attachment structure of P-type crystal silicon back contacts double-side cell, component and method |
-
2013
- 2013-06-05 CN CN 201320322030 patent/CN203260607U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876486A (en) * | 2017-03-24 | 2017-06-20 | 乐叶光伏科技有限公司 | The group string attachment structure of P-type crystal silicon back contacts double-side cell, component and method |
| CN106876486B (en) * | 2017-03-24 | 2018-11-09 | 浙江隆基乐叶光伏科技有限公司 | String formation connection structure, component and the method for P-type crystal silicon back contacts double-side cell |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |