CN209434208U - A kind of solar battery sheet and component - Google Patents
A kind of solar battery sheet and component Download PDFInfo
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- CN209434208U CN209434208U CN201920090981.1U CN201920090981U CN209434208U CN 209434208 U CN209434208 U CN 209434208U CN 201920090981 U CN201920090981 U CN 201920090981U CN 209434208 U CN209434208 U CN 209434208U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a kind of solar battery sheet and components, by the way that aperture is arranged in the end of silicon wafer, and the back side setting confluence positive electrode of silicon wafer, the confluence positive electrode is connected by aperture with the positive electrode of silicon chip back side, it realizes and each positive electrode is pooled to the confluence positive electrode, the back side of the silicon wafer is additionally provided with the confluence back electrode being oppositely arranged with the confluence positive electrode, and the confluence back electrode is connected with each back electrode respectively, and each back electrode is pooled on the confluence back electrode by realization.The design of the utility model is so that when cell piece series connection welding, and no setting is required between cell piece gap can fully utilize solar components inner space；In addition, the utility model only needs to weld a welding between cell piece and cell piece, welding manner is simple, can not only greatly save manpower, additionally it is possible to save the demand of welding.
Description
Technical field
The utility model belongs to solar-energy photo-voltaic cell manufacturing technology field, and in particular to a kind of solar battery sheet and group
Part.
Background technique
Current solar cell design is as depicted in figs. 1 and 2, and positive electrode is located at the front of cell piece, and back electrode is located at
The back side of cell piece.It needs for cell piece and battery to be cascaded when being fabricated to component, is illustrated in figure 3 five main grids
Welding of battery film schematic diagram needs that each cell piece is cascaded using five root bead bands.Wherein, the positive electrode of cell piece 1 with
Welding 1 welds, and the back electrode of the other half and cell piece 2 of welding 1 welds；The positive electrode and welding 2 of cell piece 2 weld, welding 2
The back electrode of the other half and cell piece 3 weld, the welding of remaining each cell piece is successively carried out according to such rule.As it can be seen that
Such bond pattern needs to weld the positive electrode of every cell piece and welding, the welding while a piece of cell piece back side also under
Back electrode welding, and carrying out cell piece and when welding of battery film, needing to keep between cell piece and cell piece between 2mm or so
Away to guarantee that crack will not occur during laminated compenent for cell piece.Existing this cell piece, which designs existing defect, to be had
3 points below: (1) welding process is more complicated；(2) welding used is more, to cause the increase of production cost；(3) battery
The gap of piece and cell piece occupies limited component area, thus can not generate more Multi benefit.
Utility model content
In view of the above-mentioned problems, being convenient for the weldering of cell piece the utility model proposes a kind of solar battery sheet and component
It connects, and space can be saved.
It realizes above-mentioned technical purpose, reaches above-mentioned technical effect, the utility model is achieved through the following technical solutions:
In a first aspect, the utility model provides a kind of solar battery sheet, comprising:
Silicon wafer；
Several apertures, each aperture extends through the silicon wafer, and is coated with conductive layer in each aperture；
Flannelette is formed in the front of the silicon wafer；
Doped layer is formed in the front of the silicon wafer；
Antireflection film layer is formed on the doped layer；
Positive electrode, set on the front of the silicon wafer, one end of each positive electrode is covered each by the corresponding aperture of front side of silicon wafer；
Converge positive electrode, and the confluence positive electrode covers all apertures of silicon chip back side, passes through pair with each positive electrode
It answers the conductive layer in aperture to be connected to, realizes and each positive electrode is pooled to the confluence positive electrode；
Back electrode, the back electrode are set on the back side of the silicon wafer, have gap between the confluence positive electrode；
Converge back electrode, and the confluence back electrode is set to the silicon chip back side, is oppositely arranged with confluence positive electrode, and respectively
It is connected with one end far from the confluence positive electrode on each back electrode, realizes and each back electrode is pooled to the confluence back electrode
On.
Preferably, the quantity of the back electrode and positive electrode is equal with the quantity of aperture.
Preferably, the positive electrode for stating front side of silicon wafer and the back electrode at its back side respectively correspond setting.
Preferably, the doped layer is phosphorus doping layer.
Preferably, Al-BSF is set between adjacent back electrode, and there are gap, phases between the Al-BSF and confluence positive electrode
Front gate line is set between adjacent positive electrode.
Preferably, the opening diameter range is 200-500um.
Second aspect, the utility model provide a kind of solar components, comprising:
Solar battery sheet described in any one of several first aspects；
Each solar battery sheet is sequentially arranged, the back side upward, and the confluence positive electrode of preceding a piece of solar battery sheet with after
The confluence back electrode of a piece of solar battery sheet is connected by welding.
The third aspect, the utility model provide a kind of production method of solar battery sheet, comprising the following steps:
(1) several apertures sequentially arranged are opened up in one end of silicon wafer；
(2) making herbs into wool is carried out to the front of silicon wafer；
(3) front of silicon wafer is diffused to form doped layer, there are PN junctions in the doped layer；
(4) back side of silicon wafer is polished, removes the PN junction at silicon chip edge；
(5) antireflective coating is plated with silicon chip back side on the doped layer of front side of silicon wafer；
(6) in front side of silicon wafer print positive electrode, the quantity of the positive electrode is equal with silicon wafer end the number of openings, and it is each just
Wherein one end of electrode covers the corresponding aperture of front side of silicon wafer, so that the slurry of print positive electrode reaches silicon wafer after passing through aperture
Back side position of opening forms conductive layer；
(7) front gate line is printed respectively between each adjacent positive electrode；
(8) confluence positive electrode, back electrode, confluence back electrode are printed in silicon chip back side, the confluence positive electrode covers silicon
All apertures in the piece back side, and there are gaps between each back electrode；The back electrode is located at one of silicon chip back side far from aperture
Side, quantity are equal with the quantity of positive electrode；The confluence back electrode is oppositely arranged with confluence positive electrode, and electric with each back respectively
Extremely upper one end far from the confluence positive electrode is connected；
(9) Al-BSF is printed respectively between each adjacent back electrode, between existing between the Al-BSF and confluence positive electrode
Gap completes the production of solar battery sheet.
Preferably, it is 200-500um that the opening diameter range, which is opening diameter range described in 200-500um,.
Fourth aspect, the utility model provide a kind of production method of solar components, comprising:
By solar battery sheet described in any one of several first aspects sequentially close to placement, and each solar battery
The equal back side of piece is upward；
The confluence back electrode of adjacent solar battery piece is connected with confluence positive electrode using welding.
Compared with prior art, the utility model has the beneficial effects that
(1) welding process of the solar battery of the utility model is simple, in contrast to the N item of existing N number of main grid cell piece
Positive electrode and N back electrode are both needed to weld using welding, and the utility model only needs to can be realized using a welding by two
Cell piece two panels cell piece is together in series.
(2) welding is saved, the cell piece of the utility model designs, and the welding used needed for connecting between cell piece is only existing
There are 1/10th of welding manner.
(3) component feature space is saved, existing welding of battery film mode to stay when connecting between cell piece and cell piece
There is the gap of 2mm or so, this segment space is not utilized, and when the series connection welding of the cell piece of the utility model between cell piece
No setting is required gap, can fully utilize component internal space.
Detailed description of the invention
Fig. 1 is the frontal design schematic diagram of cell piece in the prior art；
Fig. 2 is the back side design diagram of cell piece in the prior art；
Fig. 3 is welding of battery film mode structural schematic diagram in the prior art；
Fig. 4 is a kind of production method flow diagram of embodiment of the utility model；
Fig. 5 is a kind of silicon wafer open-celled structure schematic diagram of embodiment of the utility model；
Fig. 6 is a kind of cell piece back side of embodiment of the utility model；
Fig. 7 is a kind of cell piece front of embodiment of the utility model；
Fig. 8 is a kind of welding of battery film of embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to embodiments, to this
Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain that this is practical
It is novel, it is not used to limit the utility model.
The application principle of the utility model is explained in detail with reference to the accompanying drawing.
Embodiment 1
The utility model embodiment provides a kind of solar battery sheet, and the solar battery sheet includes:
Silicon wafer 1；
Several apertures 2, each aperture 2 extends through the silicon wafer 1, and is coated with conductive layer in each aperture 2；It is i.e. described
Aperture 2 is located at 1 marginal position of silicon wafer, it is preferable that 2 diameter range of aperture is 200-500um, the number of aperture 2 and position with just
Electrode 3 and 6 quantity of back electrode and position are adapted；As shown in figure 4, in a kind of specific embodiment party of the utility model embodiment
In formula, the quantity of the aperture 2 can be set to 5, be respectively positioned on 1 one end of silicon wafer, and be sequentially arranged at equal intervals；
Flannelette (not shown) is formed in the front of the silicon wafer 1；
Doped layer (not shown) is formed in the front of the silicon wafer 1；It is specific in one kind of the utility model embodiment
In embodiment, the doped layer be phosphorus doping layer, inside there are PN junctions；
Antireflection film layer (not shown) is formed on the doped layer；In the preferred reality of the utility model embodiment
It applies in mode, the antireflective coating is made of silicon nitride material；
Positive electrode 3, set on the front of the silicon wafer 1, one end of each positive electrode 3 is covered each by that the front of silicon wafer 1 is corresponding to open
Hole 2；In a kind of specific embodiment of the utility model embodiment, the positive electrode 3 is obtained by printing silver paste；
Converge positive electrode 7, and the confluence positive electrode 7 covers all apertures 2 in 1 back side of silicon wafer, logical with each positive electrode 3
The conductive layer (not shown) connection in corresponding aperture 2 is crossed, realizes and each positive electrode 3 is pooled to the confluence positive electrode 7；
Front gate line 8 is set between adjacent positive electrode 3；
Back electrode 6, it is described on the back side of the silicon wafer 1, there is gap between the confluence positive electrode 7；Institute
The quantity for stating back electrode 6 and positive electrode 3 is equal with the quantity of aperture 2, and the positive positive electrode 3 of the silicon wafer 1 and its back side
Back electrode 6 respectively correspond setting；Al-BSF 5 is set between adjacent back electrode 6, between the Al-BSF 5 and confluence positive electrode 7
There are gaps；
Converge back electrode 4, and the confluence back electrode 4 is set to 1 back side of silicon wafer, is oppositely arranged with confluence positive electrode 7, and
It is connected respectively with one end far from the confluence positive electrode 7 on each back electrode, realizes and each back electrode is pooled to the confluence
On back electrode 4.
Embodiment 2
The utility model embodiment provides a kind of solar components, comprising:
Solar battery sheet described in several embodiments 1；
Each solar battery sheet is sequentially arranged, the back side upward, and the confluence positive electrode 7 of preceding a piece of solar battery sheet with after
The confluence back electrode 4 of a piece of solar battery sheet is connected by welding 9.
Embodiment 3
The utility model embodiment provides a kind of production method of solar battery sheet, and it is practical new to be illustrated in figure 4 this
The process flow chart of production method in type embodiment, specifically includes the following steps:
Step (1): carrying out aperture 2 on silicon wafer 1, specifically:
Carry out aperture 2 in 1 marginal position of silicon wafer, 2 diameter range of aperture is 200-500um, the number of aperture 2 and position with
6 quantity of back electrode and position are adapted, i.e., the number of aperture 2 and position are determined by back electrode 6 and 3 quantity of positive electrode and position
It is fixed.As shown in figure 5, in the present embodiment, it is located at 1 marginal position of silicon wafer on silicon wafer 1 and has opened 5 holes, when aperture 2 preferably adopts
Aperture 2 is carried out with laser means, since the specific means of aperture 2 is not the important practical novel point of the utility model,
It is not specifically limited；
Step (2): making herbs into wool is carried out at least one surface of silicon wafer 1, forms flannelette；It in the specific implementation, can be simultaneously
Making herbs into wool is carried out in the front and back of silicon wafer 1, forms flannelette, only can also carry out making herbs into wool in the front of silicon wafer 1；
Step (3): phosphorus diffusion is carried out to the front of silicon wafer 1 and forms doped layer, there are PN junctions in the doped layer；
Step (4) plates antireflective coating in the front and back of silicon wafer 1；
Step (5): the PN of 1 edge of silicon wafer is polished, removed to the back side of silicon wafer 1 (so that the PN of front and back
Knot is not turned on) knot and the positive phosphorosilicate glass of silicon wafer 1, the phosphorosilicate glass be inevitable during forming PN junction in step (3)
The by-product of generation；
In the preferred embodiment of the utility model embodiment, the antireflective coating is made of silicon nitride material；
Step (6): printing, the step (6) specifically include following sub-step:
(6.1) in front side of silicon wafer print positive electrode 3, the quantity of the positive electrode 3 is equal with silicon wafer end the number of openings, and
Wherein one end of each positive electrode 3 covers the corresponding aperture of front side of silicon wafer, so that the slurry of print positive electrode 3 arrives after passing through aperture
Up to silicon chip back side position of opening, conduction is formed, so that positive electrode 3 is transferred to 1 back side of silicon wafer, referring specifically to Fig. 7；
(6.2) front gate line 8 is printed respectively between each adjacent positive electrode 3；
(6.3) confluence positive electrode 7, back electrode 6, confluence back electrode 4 are printed in silicon chip back side, the confluence positive electrode 7 covers
All apertures of silicon chip back side are covered, and there are gaps between each back electrode 6；It is separate that the back electrode 6 is located at silicon chip back side
The side of aperture, quantity are equal with the quantity of positive electrode 3；The confluence back electrode 4 is oppositely arranged with confluence positive electrode 7, and
It is connected respectively with one end far from the confluence positive electrode 7 on each back electrode 6, to all back electrodes 6 are transferred to described
Converge on back electrode 4, referring specifically to fig. 6；
(6.4) Al-BSF 5 is printed respectively between each adjacent back electrode 6, between the Al-BSF 5 and confluence positive electrode 7
There are gaps, complete the production of solar battery sheet.
Embodiment 4
Based on embodiment 3, the utility model embodiment provides a kind of production method of solar components, in addition to including real
It applies other than seven steps in example 3, further comprising the steps of:
Step (8): the equal back side of cell piece to be spliced is sequentially placed upward, and sequentially by the confluence of preceding a piece of cell piece
Back electrode 4 is connected with the confluence positive electrode 7 of rear a piece of cell piece by welding 9, i.e., by the confluence back electrode 4 of preceding a piece of cell piece
End be bonded with the end of the confluence positive electrode 7 of rear a piece of cell piece, be not provided with, referring specifically to Fig. 8, realizing there are gap
Welding between cell piece need to only weld front, and space is greatly saved without any gap between adjacent cell piece.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (7)
1. a kind of solar battery sheet characterized by comprising
Silicon wafer；
Several apertures, each aperture extends through the silicon wafer, and is coated with conductive layer in each aperture；
Flannelette is formed in the front of the silicon wafer；
Doped layer is formed in the front of the silicon wafer；
Antireflection film layer is formed on the doped layer；
Positive electrode, set on the front of the silicon wafer, one end of each positive electrode is covered each by the corresponding aperture of front side of silicon wafer；
Converge positive electrode, and the confluence positive electrode covers all apertures of silicon chip back side, is opened with each positive electrode by corresponding
Conductive layer connection in hole, realizes each positive electrode being pooled to the confluence positive electrode；
Back electrode, the back electrode are set on the back side of the silicon wafer, have gap between the confluence positive electrode；
Converge back electrode, and the confluence back electrode is set to the silicon chip back side, is oppositely arranged with confluence positive electrode, and respectively and respectively
One end far from the confluence positive electrode on back electrode is connected, and each back electrode is pooled on the confluence back electrode by realization.
2. a kind of solar battery sheet according to claim 1, it is characterised in that: the quantity of the back electrode and positive electrode
It is equal with the quantity of aperture.
3. a kind of solar battery sheet according to claim 1, it is characterised in that: the positive electrode of the front side of silicon wafer and its
The back electrode at the back side respectively corresponds setting.
4. a kind of solar battery sheet according to claim 1, it is characterised in that: the doped layer is phosphorus doping layer.
5. a kind of solar battery sheet according to claim 1, it is characterised in that: aluminium is arranged between adjacent back electrode and carries on the back
, there are gap between the Al-BSF and confluence positive electrode, front gate line is set between adjacent positive electrode.
6. a kind of solar battery sheet according to claim 1, it is characterised in that: the opening diameter range is 200-
500um。
7. a kind of solar components characterized by comprising
Several solar battery sheets described in any one of claims 1-6；
Each solar battery sheet is sequentially arranged, the back side upward, and the confluence positive electrode of preceding a piece of solar battery sheet with it is rear a piece of
The confluence back electrode of solar battery sheet is connected by welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920090981.1U CN209434208U (en) | 2019-01-21 | 2019-01-21 | A kind of solar battery sheet and component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920090981.1U CN209434208U (en) | 2019-01-21 | 2019-01-21 | A kind of solar battery sheet and component |
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| CN209434208U true CN209434208U (en) | 2019-09-24 |
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| CN201920090981.1U Active CN209434208U (en) | 2019-01-21 | 2019-01-21 | A kind of solar battery sheet and component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585590A (en) * | 2019-01-21 | 2019-04-05 | 南通苏民新能源科技有限公司 | A kind of solar battery sheet, component and production method |
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2019
- 2019-01-21 CN CN201920090981.1U patent/CN209434208U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585590A (en) * | 2019-01-21 | 2019-04-05 | 南通苏民新能源科技有限公司 | A kind of solar battery sheet, component and production method |
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Effective date of registration: 20230815 Granted publication date: 20190924 |
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