CN110379877A - A kind of battery blade unit, solar cell module and preparation method thereof - Google Patents
A kind of battery blade unit, solar cell module and preparation method thereof Download PDFInfo
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- CN110379877A CN110379877A CN201810323233.3A CN201810323233A CN110379877A CN 110379877 A CN110379877 A CN 110379877A CN 201810323233 A CN201810323233 A CN 201810323233A CN 110379877 A CN110379877 A CN 110379877A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 238000010248 power generation Methods 0.000 claims abstract description 73
- 210000004027 cell Anatomy 0.000 claims description 101
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 26
- 238000005520 cutting process Methods 0.000 claims description 26
- 239000010703 silicon Substances 0.000 claims description 26
- 229910052710 silicon Inorganic materials 0.000 claims description 26
- 238000007639 printing Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 5
- 210000005056 cell body Anatomy 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 claims 1
- 238000003475 lamination Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000003466 welding Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 239000006117 anti-reflective coating Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 210000002268 wool Anatomy 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
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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
-
- 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
Abstract
The present invention provides a kind of battery blade units, solar cell module and preparation method thereof, battery blade unit is cut by solar battery sheet and is obtained, every solar battery sheet can at least be divided at least two panels battery blade unit, the battery blade unit includes obverse and reverse, the front is provided with power generation area and is set to the front main grid line of power generation area side long side edge, several thin grid lines are provided in the power generation area, the thin grid line is connected with the front main grid line；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at the opposite sides of the battery blade unit；The boundary of battery blade unit long side where two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein at least reverse side main gate line is projected as curve, broken line or curve, broken line, two or three of combination in straight line.When solar battery sheet to be split, using this programme, the effective rate of utilization of solar battery sheet is just significantly improved.Solar cell module is made of the battery blade unit battery string location that successively imbrication connects and composes.
Description
Technical field
The present invention relates to solar cell module fields, in particular to a kind of battery blade unit, solar battery
Component and preparation method thereof.
Background technique
With the extensive use of solar energy, solar energy photovoltaic panel industry also flourishes.Traditional, solar panel exists
It when production, due to the characteristic of battery chip architecture, is required to for muti-piece cell piece and welding to be welded into battery strings, then by multi-string battery
String is connected into component with welding.
Due to being provided with welding on every cell piece, the illuminating area of cell piece is greatly reduced, so that reducing has
The generating area of effect；Furthermore in battery strings made of concatenation, there is also spacing between cell piece and cell piece, equally reduce
Illuminating area or generating area；Two above reason causes the generated output of battery component relatively low.
In order to overcome the problems referred above, there is a kind of technical solution of cell piece imbrication connection, such as the applicant's earlier application
Patent CN201511027962.7, disclose a kind of solar battery sheet, solar cell module, battery blade unit and its system
Preparation Method, main technical schemes are as follows: a kind of solar battery sheet, including Al-BSF coating, silicon wafer layer and thin grid line, described
Solar battery sheet front is divided at least two independent regions, wherein a side edge or the neighbouring edge in each region
Equipped at least one front main grid line, all thin grid lines in the front in the region are all corresponding with the front main grid line in the region to be electrically connected
It connects.
Solar battery sheet mentioned here is an essential element for being used to prepare solar cell module, size
It is the 2 times or more of battery blade unit of the present invention.In traditional production technology, this solar battery sheet includes silicon
Piece, Al-BSF coating, the thin grid line in front, three or four longitudinal directions main gate line need to use when preparing solar cell module
Welding has connected the main grid wire bonding of multiple solar battery sheets, and usual existing solar battery on piece is each
Energy conversion unit is that an entirety is connected as by thin grid line and main gate line, and every main gate line is collected simultaneously left and right sides energy
The electric current of converting unit.The main gate line of solar battery on piece of the invention is laterally arranged, and by solar battery sheet
It is divided into mutually independent at least two region, a front main grid line is only arranged in each region, and every main gate line only collects this
The electric current of region (side for being only located at the front main grid line) energy conversion unit, in order to improve the transfer efficiency of energy, this
Region is the smaller the better, and the path of thin in this way grid line to main gate line is shorter, and the efficiency for collecting conversion is higher, by technique and cost
Limitation, is preferably selected between 2-6 isolated area, can also according to actual needs, preparation 7 and area above
Solar battery sheet.Solar battery sheet of the invention has higher flexibility in the application and preparation of solar components, lifts
Under such as: 1, each region can be cut into independent solar battery blade unit one by one, each solar battery blade unit it
Between connection can be used serial arrangement, head and the tail staggeredly superposition mode connect, such as by the master of every a piece of solar battery sheet unit
Grid line is placed in the top of entire solar battery blade unit, each unit piece is successively arranged from top to bottom, upper a piece of lower edge is just
The upper edge of next unit piece is ridden over well, and just covers the main gate line of next unit piece, and make the main gate line of next unit piece
It is electrically connected with the back side anode of upper unit piece, and so on, all unit pieces are together in series, in this way, solar battery
The front of component does not appear main gate line, and no main gate line occupies the useful space, so that entire solar cell module is effective
Generating area increases, and no longer needs to connect using welding, abandoned welding connection bring process increase, increased costs,
The drawbacks of occupying effective generating area.2, staggeredly superposition arrangement in the manner described above, but front main grid line and the upper a piece of back side
Positive electrode is dielectrically separated from, and the front main grid line of all unit pieces all links together in side or the back side, the back of all units
Face positive electrode also links together, and finally draws respectively, that is, forms the modular construction of parallel-connection structure.3, by above two connection side
Formula carries out any combination, available assembly circuit form more abundant.4, can use connecting line by it is some region of just
Face main gate line and the rear electrode in another region connect, in this way, can not have to cutting cell piece, first by a piece of solar-electricity
Above the piece of pond each region series or in parallel or series, Hybrid connections in parallel get up, then multi-disc solar battery sheet is carried out again
Series connection, finally completes the installation of a solar cell module.
The mode of above-mentioned imbrication connection makes solar cell module front power generation region, and there is no main gate lines, solve master
The problem of grid line covers and occupies effective generating area, and imbrication connection is so that there is no gaps between battery blade unit, therefore
Also solve the problems, such as that gap occupies effective generating area.But the region being overlapped between general main gate line and reverse side main gate line
Width is between 1.0-1.8mm, that is to say, that when preparation unit piece, it is 1.0- that front main grid line, which can occupy width,
1.8mm, the area of length and the consistent solar battery sheet of unit leaf length, so that it is single to cut preparation using solar battery sheet
The effective rate of utilization of first piece reduces.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of cell pieces of solar battery sheet utilization rate
Unit, solar cell module and preparation method thereof.
In order to achieve the above objectives, technical scheme is as follows:
A kind of battery blade unit is cut by solar battery sheet and is obtained, and every solar battery sheet can be at least divided into
At least two panels battery blade unit, the battery blade unit includes obverse and reverse, and the front is provided with power generation area and is set to
The front main grid line of power generation area side long side edge, is provided with several thin grid lines in the power generation area, the thin grid line with
The front main grid line is connected；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main grid
Line is located at the opposite sides of the battery blade unit；Two cell pieces where the front main grid line and reverse side main gate line
The boundary of battery blade unit long side is projected as curve, broken line or curve, folding where unit long side, wherein at least reverse side main gate line
Two or three of combination in line, straight line.
When preparing battery blade unit, at least by the side of reverse side main gate line side according to curve, broken line, or song
Line, broken line, two or three of combination in straight line.Specifically before cutting solar battery sheet is to obtain battery blade unit,
The cut-off rule between each battery blade unit is prepared according to the design shape of battery blade unit, this cut-off rule is by the straight of the prior art
Line is changed to curve, broken line or curve, broken line, two or three of combination in straight line.When the front main grid line of battery blade unit
Place side is straight line, and side is curve, broken line or curve, broken line, two or three in straight line only where reverse side main gate line
When combination, cut-off rule is exactly that straight line and (curve, broken line or curve, broken line, two or three of combination in straight line) interval are set
It sets, the two sides of straight line are arranged the front main grid line of two neighboring battery blade unit, curve, broken line or curve, broken line, in straight line
Two or three of combined two sides the reverse side main gate line of two neighboring battery blade unit is set.As battery blade unit front master
Side where grid line and reverse side main gate line is curve, broken line or curve, broken line, two or three of combination in straight line
When, then the stripe shape of side is mirror symmetry where the front main grid line Yu reverse side main gate line of each battery blade unit, i.e.,
High point is to high point, and low spot is to low spot.Generally in order to which the dosage for saving conducting resinl, front main grid line and reverse side main gate line can be line
The setting of section interval, every section is arranged at the corresponding inside of place side outwardly convex (high point).In this way, in lamination connection, phase
The area mutually covered between adjacent two panels battery blade unit will effectively reduce, and specifically be exactly only to need high point part covering foot
Enough width, such as it is normal 1.4mm that high point, which is overlapped the width of (covering), and the width of low spot covering can be and be less than
The arbitrary value of 1.4mm, such as 1.0mm, then the wide overlapping covering of 1.4mm compared to the prior art, this programme can have bright
Aobvious saving advantage can be effective power generation region in uncovered area.Therefore, it is split by solar battery sheet
When, using this programme, the effective rate of utilization of solar battery sheet is just significantly improved.
Further, the curve, broken line or curve, broken line, two or three of combination in straight line, boundary are thrown
Shadow is in cyclically-varying.
Further, the curve, broken line or curve, broken line, two or three of combination in straight line, reverse side main grid
Vertical range between the highest point and the lowest point of the boundary projection of battery blade unit long side where line is greater than 0, it is described vertically away from
From referring to the vertical range for passing through the highest point and the lowest point respectively and between two straight lines being parallel to each other, also, this two
Straight line is vertical with two short sides of battery blade unit.
Further, the reverse side main gate line is multistage, and the position of every section of reverse side main gate line arrangement corresponds to reverse side main grid
The inside of the highest point of the boundary projection of battery blade unit long side where line.
Further, the front main grid line is multistage, position and each section of reverse side main gate line one-to-one correspondence.
Further, be provided between each section of front main grid line connection grid line and/or power generation area be equipped at least one with
The thin grid line of the parallel transverse direction of battery blade unit long side, laterally thin grid line connects the thin grid line in all longitudinal directions, with each section of front main grid
The corresponding front main grid line connection of longitudinal thin grid line of line corresponding position.
The present invention also provides a kind of solar cell module, the battery blade unit including at least a string vertical or horizontal arrangements
Group, every string battery blade unit group include that at least two panels battery blade unit, the cell piece cell body with a string is successively locally overlapped
Arrangement, the battery blade unit includes obverse and reverse, and the front is provided with power generation area and is set to the power generation area side
The front main grid line of long side edge is provided with several thin grid lines, the thin grid line and the front main grid line in the power generation area
It is connected；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line be located at it is described
The opposite sides of battery blade unit；Two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein
The boundary of battery blade unit long side is projected as curve, broken line or curve, broken line, two in straight line at least where reverse side main gate line
Kind or three kinds of combination；
When battery blade unit is two panels, wherein the front main grid line of a piece of battery blade unit overlaps other a piece of battery
In the reverse side main gate line of blade unit, and it is conductively connected；Wherein, the width of the overlapping region of two panels battery blade unit is in periodically change
Change or aperiodicity change；
When battery blade unit is greater than two panels, the front main grid line of battery blade unit successively overlaps adjacent a piece of cell piece
In the reverse side main gate line of unit, and it is conductively connected；Wherein, the width of the overlapping region of adjacent two panels battery blade unit is in periodically
Variation or aperiodicity change.
Further, the reverse side main gate line is multistage, and the position of every section of reverse side main gate line arrangement corresponds to reverse side main grid
The position of the highest point of the boundary projection of battery blade unit long side where line.
Further, the front main grid line is multistage, position and each section of reverse side main gate line one-to-one correspondence.
Further, be provided between each section of front main grid line connection grid line and/or power generation area be equipped at least one with
The thin grid line of the parallel transverse direction of battery blade unit long side, laterally thin grid line connects the thin grid line in all longitudinal directions, with each section of front main grid
The corresponding front main grid line connection of longitudinal thin grid line of line corresponding position.
The present invention also provides a kind of preparation methods of battery blade unit, comprising the following steps:
Cut-off rule is arranged in the first step, and the size or quantity needed in solar battery on piece according to battery blade unit is arranged
Cut-off rule, cut-off rule are located between adjacent cell blade unit long side and consistent with long side boundary shape；And each cell piece of printing
The thin grid line of the front main grid line of unit, reverse side main gate line and power generation area；The battery blade unit includes obverse and reverse, described
Front is provided with power generation area and is set to the front main grid line of power generation area side long side edge, is provided in the power generation area
Several thin grid lines, the thin grid line are connected with the front main grid line；The reverse side is provided with reverse side main gate line and Al-BSF,
And front main grid line and reverse side main gate line are located at the opposite sides of the battery blade unit；The front main grid line and reverse side
The boundary projection of battery blade unit long side where two battery blade unit long sides where main gate line, wherein at least reverse side main gate line
For two or three of combination in curve, broken line or curve, broken line, straight line；
Second step prepares battery blade unit, is cut according to cut-off rule, obtains battery blade unit.
When preparing battery blade unit, at least by the side of reverse side main gate line side according to curve, broken line, or song
Line, broken line, two or three of combination in straight line.Specifically before cutting solar battery sheet is to obtain battery blade unit,
The cut-off rule between each battery blade unit is prepared according to the design shape of battery blade unit, this cut-off rule is by the straight of the prior art
Line is changed to curve, broken line or curve, broken line, two or three of combination in straight line.When the front main grid line of battery blade unit
Place side is straight line, and side is curve, broken line or curve, broken line, two or three in straight line only where reverse side main gate line
When combination, cut-off rule is exactly that straight line and (curve, broken line or curve, broken line, two or three of combination in straight line) interval are set
It sets, the two sides of straight line are arranged the front main grid line of two neighboring battery blade unit, curve, broken line or curve, broken line, in straight line
Two or three of combined two sides the reverse side main gate line of two neighboring battery blade unit is set.As battery blade unit front master
Side where grid line and reverse side main gate line is curve, broken line or curve, broken line, two or three of combination in straight line
When, then the stripe shape of side is mirror symmetry where the front main grid line Yu reverse side main gate line of each battery blade unit, i.e.,
High point is to high point, and low spot is to low spot.Generally in order to which the dosage for saving conducting resinl, front main grid line and reverse side main gate line can be line
The setting of section interval, every section is arranged at the corresponding inside of place side outwardly convex (high point).In this way, in lamination connection, phase
The area mutually covered between adjacent two panels battery blade unit will effectively reduce, and specifically be exactly only to need high point part covering foot
Enough width, such as it is normal 1.4mm that high point, which is overlapped the width of (covering), and the width of low spot covering can be and be less than
The arbitrary value of 1.4mm, such as 1.0mm, then the wide overlapping covering of 1.4mm compared to the prior art, this programme can have bright
Aobvious saving advantage can be effective power generation region in uncovered area.Therefore, it is split by solar battery sheet
When, using this programme, the effective rate of utilization of solar battery sheet is just significantly improved.
The present invention also provides a kind of preparation methods of solar cell module, comprising the following steps:
The first step prepares battery blade unit, and solar battery sheet is cut into the battery blade unit of two panels or two panels or more,
Institute's battery blade unit includes obverse and reverse, and the front is provided with power generation area and is set to power generation area side long side
The front main grid line at edge is provided with several thin grid lines in the power generation area, and the thin grid line is connected with the front main grid line
It connects；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at the battery
The opposite sides of blade unit；Two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein at least
The boundary of battery blade unit long side where reverse side main gate line be projected as curve, broken line or curve, broken line, two kinds in straight line or
Three kinds of combination；
Battery blade unit more than two panels or two panels is connected into battery string location, together by second step in the way of imbrication
A string of battery blade unit successively local overlapping arrangement, the battery blade unit includes obverse and reverse, and the front is provided with
Power generation area and the front main grid line for being set to power generation area side long side edge are provided with several thin grid in the power generation area
Line, the thin grid line are connected with the front main grid line；The reverse side is provided with reverse side main gate line and Al-BSF, and front is main
Grid line and reverse side main gate line are located at the opposite sides of the battery blade unit；
When battery blade unit is two panels, wherein the front main grid line of a piece of battery blade unit overlaps other a piece of battery
In the reverse side main gate line of blade unit, and it is conductively connected；Wherein, the width of the overlapping region of two panels battery blade unit is in periodically change
Change or aperiodicity change；
When battery blade unit is greater than two panels, the front main grid line of battery blade unit successively overlaps adjacent a piece of cell piece
In the reverse side main gate line of unit, and it is conductively connected；Wherein, the width of the overlapping region of adjacent two panels battery blade unit is in periodically
Variation or aperiodicity change；
Multiple battery string locations are connected as required and are encapsulated as too according to the needs of solar cell module by third step
Positive energy battery component.
Further, which is characterized in that the reverse side main gate line is multistage, and the position of every section of reverse side main gate line arrangement is corresponding
The inside of the highest point of the boundary projection of battery blade unit long side where reverse side main gate line.
Further, the front main grid line is multistage, position and each section of reverse side main gate line one-to-one correspondence.
Further, be provided between each section of front main grid line connection grid line and/or power generation area be equipped at least one with
The thin grid line of the parallel transverse direction of battery blade unit long side, laterally thin grid line connects the thin grid line in all longitudinal directions, with each section of front main grid
The corresponding front main grid line connection of longitudinal thin grid line of line corresponding position.
It is further, further comprising the steps of in the first step,
One, it prints: respectively corresponding printing front silk screen figure and reverse side silk screen figure on the positive and negative of silicon wafer, it is described
Front silk screen figure includes thin grid line and the front main grid line perpendicular with the thin grid line, the front main grid line uniform intervals
Setting, and along the length direction of the thin grid line, the edge of the side of the front silk screen figure is provided with front edge main grid
Line；
The reverse side silk screen figure includes reverse side main gate line and Al-BSF, the reverse side main gate line and the front main grid line
Direction is consistent, and uniform intervals are arranged, and the edge of the side of the reverse side silk screen figure is provided with opposite longitudinal side edge main gate line, described
Front edge main gate line and opposite longitudinal side edge main gate line are located at the opposite sides of the silicon wafer；
Two, it cuts: being cut using cutting equipment along cutting line, form battery blade unit described in multi-disc；
Wherein, the cutting line is used to silicon wafer being cut into independent battery blade unit.
The present invention also provides a kind of preparation methods of solar battery sheet, prepare the sun as described in claim 1 or 2
Energy cell piece, specifically includes the following steps:
One, silicon wafer detects；
Two, surface wool manufacturing；
Three, diffusion；
Four, phosphorosilicate glass is removed；
Five, battery edge PN junction is removed；
Six, antireflective coating is prepared；
Seven, positive and negative electrode is prepared, comprising the following steps:
(1), front electrode is printed: corresponding printing front silk screen figure, the front silk screen figure on the front of silicon wafer
Cell piece is divided at least two regions, each region includes thin grid line and the front main grid that is connected with the thin grid line
Line, the front main grid line parallel interval setting of different zones, wherein being located at the front main grid line in two regions at cell piece edge
It is respectively arranged at the edge of cell piece or close to edge；
(2), printed back Al-BSF: in the corresponding printing reverse side silk screen figure in the back side of silicon wafer, including reverse side main gate line and
Al-BSF, the reverse side main gate line is parallel with the front main grid line, each corresponding positive region is respectively provided with a back side
Main gate line, and back side main gate line is located at side of the region far from front main grid line；
Eight, it is sintered.
Detailed description of the invention
It in order to more clearly illustrate the technical solutions in the embodiments of the present invention, below will be in embodiment technical description
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of positive structural schematic diagram of battery blade unit of the present invention；
Fig. 2 is a kind of structural schematic diagram of battery blade unit reverse side of the present invention；
Fig. 3 is the positive another structural schematic diagram of battery blade unit of the present invention；
Fig. 4 is another structural schematic diagram of battery blade unit reverse side of the present invention；
Fig. 5 is the front schematic view that battery blade unit was arranged and cut to solar battery sheet of the present invention how；
Fig. 6 is the reverse side schematic diagram that battery blade unit was arranged and cut to solar battery sheet of the present invention how；
Fig. 7 is another front schematic view that battery blade unit was arranged and cut to solar battery sheet of the present invention how；
Fig. 8 is another reverse side schematic diagram that battery blade unit was arranged and cut to solar battery sheet of the present invention how；
The schematic diagram that Fig. 9 is connected with Figure 10 for battery blade unit lamination of the present invention.
Wherein, 1, solar battery sheet, 11, front main grid line, 12, thin grid line, 16, reverse side main gate line, 13, front main grid
Two battery blade unit long sides where line, 14, two battery blade unit long sides where reverse side main gate line, 15, side, 10,
Cutting line.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to reach the purpose of the present invention, a kind of battery blade unit, by cutting on solar battery sheet 1 along cutting line 10
, as viewed in figures 5-8, every solar battery sheet 1 can at least be divided at least two panels battery blade unit, and (Fig. 5-8 is cutting
For the example of 6 battery blade units), the battery blade unit includes obverse and reverse, and as shown in figures 1 and 3, reverse side is such as in front
Shown in Fig. 2 and Fig. 4, the front is provided with power generation area and is set to the front main grid line of power generation area side long side edge
11, several thin grid lines 12 are provided in the power generation area, and the thin grid line is connected with the front main grid line；The reverse side is set
It is equipped with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at opposite the two of the battery blade unit
Side；Two battery blade unit long sides 13/14 where the front main grid line and reverse side main gate line, wherein at least reverse side main grid
The boundary of battery blade unit long side 14 where line is projected as curve, broken line or curve, broken line, two or three in straight line
Combination.
The front main grid line of battery blade unit in fig. 1 and 2 and two battery blade units where reverse side main gate line
The boundary of long side 13/14 is projected as the example of cyclic curve, and Fig. 5 and Fig. 6 are by solar battery sheet edge and above-mentioned periodicity
The consistent cut-off rule 10 of curve is cut, and the example of 6 above-mentioned cell piece units is obtained.
The front main grid line of battery blade unit in figs. 3 and 4 and two battery blade units where reverse side main gate line
In long side, the boundary of battery blade unit long side 14 where reverse side main gate line is projected as cyclic curve, electricity where front main grid line
How the straight line that the boundary projection of pond blade unit long side 13 uses, Fig. 7 and Fig. 8 are by solar battery sheet edge and above-mentioned periodicity
Curve and the consistent cut-off rule 10 of straight line are cut, and the example of 6 above-mentioned cell piece units is obtained.
When preparing battery blade unit, at least by the side of reverse side main gate line side according to curve, broken line, or song
Line, broken line, two or three of combination in straight line.Specifically before cutting solar battery sheet is to obtain battery blade unit,
The cut-off rule between each battery blade unit is prepared according to the design shape of battery blade unit, this cut-off rule is by the straight of the prior art
Line is changed to curve, broken line or curve, broken line, two or three of combination in straight line.When the front main grid line of battery blade unit
Place side is straight line, and side is curve, broken line or curve, broken line, two or three in straight line only where reverse side main gate line
When combination, cut-off rule is exactly that straight line and (curve, broken line or curve, broken line, two or three of combination in straight line) interval are set
It sets, as shown in Figure 7 and Figure 8.The front main grid line of two neighboring battery blade unit, curve, broken line, or song is arranged in the two sides of straight line
The reverse side main gate line of two neighboring battery blade unit is arranged in line, broken line, two or three of combined two sides in straight line.Work as electricity
Side where pond blade unit front main grid line and reverse side main gate line is curve, broken line or curve, broken line, two in straight line
When kind or three kinds of combination, then the stripe shape of the front main grid line of each battery blade unit and reverse side main gate line place side is
Mirror symmetry, i.e., high point is to high point, and low spot is to low spot.As shown in Figure 5 and Figure 6.
Generally in order to which the dosage for saving conducting resinl, front main grid line and reverse side main gate line can be the setting of line segment interval, often
The corresponding inside of side outwardly convex (high point) where section is arranged at.In this way, in lamination connection, adjacent two panels cell piece list
The area mutually covered between member will effectively reduce, be specifically exactly only need high point part to cover enough width, such as
The width that high point is overlapped (covering) is normal 1.4mm, and the width of low spot covering can be the arbitrary value less than 1.4mm, example
Such as 1.0mm, then the wide overlapping covering of 1.4mm compared to the prior art, this programme can have apparent saving advantage, not
Overlay area can be effective power generation region.Therefore, when solar battery sheet to be split, using this programme, the sun
The effective rate of utilization of energy cell piece just significantly improves.
In practical applications, in addition to the region that segmented main gate line occupies, remaining region is all the effective work that can be generated electricity
Region can be connected with one thin grid line again between each section of segmented main gate line, can also be not provided with this and be connected thin grid
Line, it is each because entire power generation area has had at least one lateral thin grid line to connect all longitudinal thin grid lines
It is actually also connection between section main gate line.
For example, a solar battery sheet is cut into 6 battery blade units, according to the cutting method of the prior art, just
It is 1.4mm that face main gate line, which occupies width, and length is equal to width (the namely long side ruler of battery blade unit of solar battery sheet
It is very little) it is 156.75mm, then every front main grid line area occupied is 156.75x1.4=282.15 square millimeters.By this battery
When blade unit progress stacked tile type is successively overlapped connection, a string of battery blade unit strings, 34 battery blade units, a solar battery
Component is calculated by 10 string battery blade unit strings, and a string of capped areas are 156.75*1.4*33.The capped face of one component
Product is 156.75*1.4*33*10.That is, in the prior art, the rectangular area of 156.75x1.4 is all where main gate line
Capped.And use the scheme of Fig. 3/4/7/8 of the present invention, when curve and straight line lamination, as camber line the highest point and the lowest point away from
From for 0.4mm, camber line highest point and straight line press 1.4mm lamination distance, a string 34, a string of component 10 calculates, a string of quilts
The area of covering is 156.75* (1.4-0.4/2) * 33.The capped area of one component is 156.75* (1.4-0.4/2) *
33*10.Compared to the prior art, each solar cell module will have more the power generation of 156.75*0.2*33*10 area.Figure 10 is
The signal of 3 battery blade unit imbrication connection building battery blade unit strings, the imbrication connection of 2 or more battery blade units are same
Reason.
And when using the scheme of Fig. 1/2/5/6, still to draft high point coverage distance for 1.4mm, between spikes/low- points
Distance be 0.4mm for (above-mentioned size can according to technique and need any setting), the practical region occupied of main gate line is not
It is the rectangular area of 156.75x1.4 again, but 156.75x (1.4-0.4/2) square millimeter.Therefore the benefit of solar battery sheet
It is further improved with rate, when the battery blade unit produced using the program carries out imbrication connection battery blade unit string,
Need to choose the consistent battery blade unit of exterior contour, and two kinds of appearance profiles can be obtained with a piece of solar battery sheet by cutting
Battery blade unit needs to separate them to be applied in different battery blade unit strings.It is set to high point corresponding position in this way
Reverse side main gate line and front main grid line can just be correspondingly connected with.Fig. 9 is 3 battery blade unit imbrication connection building battery blade units
The signal of string, the imbrication connection of 2 or more battery blade units is similarly.
Further, the curve, broken line or curve, broken line, two or three of combination in straight line, boundary are thrown
Shadow is in cyclically-varying.Such as the cyclic curve in Fig. 1/2/3/4, such as sine curve can be used, the period can be in 6-12
Middle selection is advisable, and is recommended as 8.
Further, the curve, broken line or curve, broken line, two or three of combination in straight line, reverse side main grid
Vertical range between the highest point and the lowest point of the boundary projection of battery blade unit long side where line is greater than 0, it is described vertically away from
From referring to the vertical range for passing through the highest point and the lowest point respectively and between two straight lines being parallel to each other, also, this two
Straight line is vertical with two short sides of battery blade unit.
Further, the reverse side main gate line is multistage, and the position of every section of reverse side main gate line arrangement corresponds to reverse side main grid
The inside of the highest point of the boundary projection of battery blade unit long side where line.
Further, the front main grid line is multistage, position and each section of reverse side main gate line one-to-one correspondence.
Further, be provided between each section of front main grid line connection grid line and/or power generation area be equipped at least one with
The thin grid line of the parallel transverse direction of battery blade unit long side, laterally thin grid line connects the thin grid line in all longitudinal directions, with each section of front main grid
The corresponding front main grid line connection of longitudinal thin grid line of line corresponding position.
The present invention also provides a kind of solar cell module, the battery blade unit including at least a string vertical or horizontal arrangements
Group, every string battery blade unit group include that at least two panels battery blade unit, the cell piece cell body with a string is successively locally overlapped
Arrangement, the battery blade unit includes obverse and reverse, and the front is provided with power generation area and is set to the power generation area side
The front main grid line of long side edge is provided with several thin grid lines, the thin grid line and the front main grid line in the power generation area
It is connected；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line be located at it is described
The opposite sides of battery blade unit；Two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein
The boundary of battery blade unit long side is projected as curve, broken line or curve, broken line, two in straight line at least where reverse side main gate line
Kind or three kinds of combination；
When battery blade unit is two panels, wherein the front main grid line of a piece of battery blade unit overlaps other a piece of battery
In the reverse side main gate line of blade unit, and it is conductively connected；Wherein, the width of the overlapping region of two panels battery blade unit is in periodically change
Change or aperiodicity change；
When battery blade unit is greater than two panels, the front main grid line of battery blade unit successively overlaps adjacent a piece of cell piece
In the reverse side main gate line of unit, and it is conductively connected；Wherein, the width of the overlapping region of adjacent two panels battery blade unit is in periodically
Variation or aperiodicity change.
Further, the reverse side main gate line is multistage, and the position of every section of reverse side main gate line arrangement corresponds to reverse side main grid
The position of the highest point of the boundary projection of battery blade unit long side where line.
Further, the front main grid line is multistage, position and each section of reverse side main gate line one-to-one correspondence.
Further, be provided between each section of front main grid line connection grid line and/or power generation area be equipped at least one with
The thin grid line of the parallel transverse direction of battery blade unit long side, laterally thin grid line connects the thin grid line in all longitudinal directions, with each section of front main grid
The corresponding front main grid line connection of longitudinal thin grid line of line corresponding position.
The present invention also provides a kind of preparation methods of battery blade unit, comprising the following steps:
Cut-off rule is arranged in the first step, and the size or quantity needed in solar battery on piece according to battery blade unit is arranged
Cut-off rule, and print the thin grid line of the front main grid line of each battery blade unit, reverse side main gate line and power generation area；The cell piece
Unit includes obverse and reverse, and the front is provided with power generation area and is set to the front master of power generation area side long side edge
Grid line is provided with several thin grid lines in the power generation area, and the thin grid line is connected with the front main grid line；The reverse side is set
It is equipped with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at opposite the two of the battery blade unit
Side；Where two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein at least reverse side main gate line
The boundary of battery blade unit long side is projected as curve, broken line or curve, broken line, two or three of combination in straight line.
Second step prepares battery blade unit, is cut according to cut-off rule, obtains battery blade unit.
When preparing battery blade unit, at least by the side of reverse side main gate line side according to curve, broken line, or song
Line, broken line, two or three of combination in straight line.Specifically before cutting solar battery sheet is to obtain battery blade unit,
The cut-off rule between each battery blade unit is prepared according to the design shape of battery blade unit, this cut-off rule is by the straight of the prior art
Line is changed to curve, broken line or curve, broken line, two or three of combination in straight line.When the front main grid line of battery blade unit
Place side is straight line, and side is curve, broken line or curve, broken line, two or three in straight line only where reverse side main gate line
When combination, cut-off rule is exactly that straight line and (curve, broken line or curve, broken line, two or three of combination in straight line) interval are set
It sets, the two sides of straight line are arranged the front main grid line of two neighboring battery blade unit, curve, broken line or curve, broken line, in straight line
Two or three of combined two sides the reverse side main gate line of two neighboring battery blade unit is set.As battery blade unit front master
Side where grid line and reverse side main gate line is curve, broken line or curve, broken line, two or three of combination in straight line
When, then the stripe shape of side is mirror symmetry where the front main grid line Yu reverse side main gate line of each battery blade unit, i.e.,
High point is to high point, and low spot is to low spot.Generally in order to which the dosage for saving conducting resinl, front main grid line and reverse side main gate line can be line
The setting of section interval, every section is arranged at the corresponding inside of place side outwardly convex (high point).In this way, in lamination connection, phase
The area mutually covered between adjacent two panels battery blade unit will effectively reduce, and specifically be exactly only to need high point part covering foot
Enough width, such as it is normal 1.4mm that high point, which is overlapped the width of (covering), and the width of low spot covering can be and be less than
The arbitrary value of 1.4mm, such as 1.0mm, then the wide overlapping covering of 1.4mm compared to the prior art, this programme can have bright
Aobvious saving advantage can be effective power generation region in uncovered area.Therefore, it is split by solar battery sheet
When, using this programme, the effective rate of utilization of solar battery sheet is just significantly improved.
The present invention also provides a kind of preparation methods of solar cell module, comprising the following steps:
The first step prepares battery blade unit, and solar battery sheet is cut into the battery blade unit of two panels or two panels or more,
Institute's battery blade unit includes obverse and reverse, and the front is provided with power generation area and is set to power generation area side long side
The front main grid line at edge is provided with several thin grid lines in the power generation area, and the thin grid line is connected with the front main grid line
It connects；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at the battery
The opposite sides of blade unit；Two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein at least
The boundary of battery blade unit long side where reverse side main gate line be projected as curve, broken line or curve, broken line, two kinds in straight line or
Three kinds of combination；
Battery blade unit more than two panels or two panels is connected into battery string location, together by second step in the way of imbrication
A string of battery blade unit successively local overlapping arrangement, the battery blade unit includes obverse and reverse, and the front is provided with
Power generation area and the front main grid line for being set to power generation area side long side edge are provided with several thin grid in the power generation area
Line, the thin grid line are connected with the front main grid line；The reverse side is provided with reverse side main gate line and Al-BSF, and front is main
Grid line and reverse side main gate line are located at the opposite sides of the battery blade unit；
When battery blade unit is two panels, wherein the front main grid line of a piece of battery blade unit overlaps other a piece of battery
In the reverse side main gate line of blade unit, and it is conductively connected；Wherein, the width of the overlapping region of two panels battery blade unit is in periodically change
Change or aperiodicity change；
When battery blade unit is greater than two panels, the front main grid line of battery blade unit successively overlaps adjacent a piece of cell piece
In the reverse side main gate line of unit, and it is conductively connected；Wherein, the width of the overlapping region of adjacent two panels battery blade unit is in periodically
Variation or aperiodicity change；
Multiple battery string locations are connected as required and are encapsulated as too according to the needs of solar cell module by third step
Positive energy battery component.
Further, which is characterized in that the reverse side main gate line is multistage, and the position of every section of reverse side main gate line arrangement is corresponding
The inside of the highest point of the boundary projection of battery blade unit long side where reverse side main gate line.
Further, the front main grid line is multistage, position and each section of reverse side main gate line one-to-one correspondence.
Further, be provided between each section of front main grid line connection grid line and/or power generation area be equipped at least one with
The thin grid line of the parallel transverse direction of battery blade unit long side, laterally thin grid line connects the thin grid line in all longitudinal directions, with each section of front main grid
The corresponding front main grid line connection of longitudinal thin grid line of line corresponding position.
It is further, further comprising the steps of in the first step,
One, it prints: respectively corresponding printing front silk screen figure and reverse side silk screen figure on the positive and negative of silicon wafer, it is described
Front silk screen figure includes thin grid line and the front main grid line perpendicular with the thin grid line, the front main grid line uniform intervals
Setting, and along the length direction of the thin grid line, the edge of the side of the front silk screen figure is provided with front edge main grid
Line；
The reverse side silk screen figure includes reverse side main gate line and Al-BSF, the reverse side main gate line and the front main grid line
Direction is consistent, and uniform intervals are arranged, and the edge of the side of the reverse side silk screen figure is provided with opposite longitudinal side edge main gate line, described
Front edge main gate line and opposite longitudinal side edge main gate line are located at the opposite sides of the silicon wafer；
Two, it cuts: being cut using cutting equipment along cutting line, form battery blade unit described in multi-disc；
Wherein, the cutting line is used to silicon wafer being cut into independent battery blade unit.
The present invention also provides a kind of preparation methods of solar battery sheet, prepare the sun as described in claim 1 or 2
Energy cell piece, specifically includes the following steps:
One, silicon wafer detects；
Two, surface wool manufacturing；
Three, diffusion；
Four, phosphorosilicate glass is removed；
Five, battery edge PN junction is removed；
Six, antireflective coating is prepared；
Seven, positive and negative electrode is prepared, comprising the following steps:
(1), front electrode is printed: corresponding printing front silk screen figure, the front silk screen figure on the front of silicon wafer
Cell piece is divided at least two regions, each region includes thin grid line and the front main grid that is connected with the thin grid line
Line, the front main grid line parallel interval setting of different zones, wherein being located at the front main grid line in two regions at cell piece edge
It is respectively arranged at the edge of cell piece or close to edge；
(2), printed back Al-BSF: in the corresponding printing reverse side silk screen figure in the back side of silicon wafer, including reverse side main gate line and
Al-BSF, the reverse side main gate line is parallel with the front main grid line, each corresponding positive region is respectively provided with a back side
Main gate line, and back side main gate line is located at side of the region far from front main grid line；
Eight, it is sintered.
A kind of solar cell module, the battery blade unit group including at least a string vertical or horizontal arrangements, every string battery
Blade unit group includes at least two panels battery blade unit, with a string of cell piece cell bodies successively local overlapping arrangement, the electricity
Pond blade unit includes obverse and reverse, and the front is provided with power generation area and is set to the front master of the power generation area one side edge
Grid line is provided with several thin grid lines in the power generation area, and the thin grid line is connected with the front main grid line；The reverse side is set
It is equipped with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at opposite the two of the battery blade unit
Side；Front main grid line and reverse side main gate line per a piece of cell piece unit are conductively connected respectively in adjacent and different other two panels
The wherein reverse side main gate line of a piece of battery blade unit, and the wherein front main grid line of another battery blade unit.
Battery blade unit is as shown in Figure 4 and Figure 5, the front of battery blade unit shown in Fig. 41 include thin grid line 4 and with thin grid line 4
Perpendicular front main grid line 3, front main grid line 3 are set to the side edge of battery blade unit.
1 reverse side of battery blade unit shown in Fig. 5 includes reverse side main gate line 5 and Al-BSF 6, reverse side main gate line 5 and front main grid
3 direction of line is consistent, but it is set to the other side reverse side edge opposite with front main grid line.
Fig. 6 be display two panels be ready for concatenated battery blade unit, above a piece of battery blade unit lower edge front
Electrically conductive binding material 10 is set in main gate line 3, and then a piece of cell piece unit upper edge overlaps upper a piece of cell piece list by under
Member lower edge on so that under a piece of cell piece unit reverse side main gate line and upper a piece of battery blade unit front main grid line weight
Conductive adhesive is closed together, so that the series connection for realizing two panels battery blade unit up and down is as shown in Figure 7 and Figure 8 two panels cell piece
The concatenated situation of unit, the situation after the series connection of multi-disc battery blade unit is as shown in Fig. 9.In Fig. 9,5 battery blade units of display
Successively overlapping arrangement is connected from top to bottom, and the reverse side main gate line of every battery blade unit is located above one side edge, and is located at figure
The back side shown, and front main grid line is located at the lower section one side edge of every battery blade unit, under a piece of cell piece unit upper edge
On the lower edge for overlapping a piece of battery blade unit so that under a piece of cell piece unit reverse side main gate line and upper a piece of battery
The front main grid line of blade unit is overlapped conductive adhesive together, to realize the series connection of multi-disc battery blade unit up and down, most end form
At a string of battery blade unit groups, the quantity for the battery blade unit that every string battery blade unit group includes can be general to select with unrestricted choice
Select 2-80 piece.The front of a piece of a piece of battery blade unit of reverse side main gate line and bottom in every string battery blade unit group the top
Main gate line becomes the positive and negative polarities of whole string battery blade unit group, can be electrically connected lead-out wire and busbar herein, can also be with
Other battery blade unit groups carry out the solar cell module series-parallel, final composition needs.
As described above, solar cell module includes at least battery blade unit that is mutually bonded of two panels, the battery blade unit
Including obverse and reverse, the front is provided with power generation area and is set to the front main grid line of the power generation area one side edge, institute
It states and is provided with several thin grid lines in power generation area, the thin grid line is connected with the front main grid line；The reverse side is provided with instead
Face main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at the opposite sides of the battery blade unit；Its
In the reverse side main gate line of a piece of battery blade unit bond and be conductively connected in addition a piece of front main grid line.In practical application
In, the electrical connection between positive and negative main gate line and battery blade unit group can also be carried out using welding or other electric connection modes.
Under general scenario, the front main grid line connects one end of the thin grid line.The thin full entire cell piece of grid line arrangement
The effective area of unit, arrangement pattern occupy front face area as principle to increase collection efficiency and reduce, are arranged simultaneously sometimes
The thin grid line of both direction in length and breadth prevents certain thin grid line fracture from effective generating area being caused to reduce, after thin grid line collected current,
The front main grid line that connection is located at cell piece element sides edge exports, and using the arrangement mode of above-mentioned superposition, main gate line is no longer occupied
The effective generating area of front cell piece component, substantially increases production efficiency, while no longer welding being needed to weld, is greatly saved
Production process and cost.
In order to which further satisfaction electrical connection performance requires and reduce area accounting, the front per a piece of cell piece unit is main
Grid line is overlapped with the reverse side main gate line of adjacent cell blade unit and stacks, and the width that adjacent two panels battery blade unit overlaps is
0.9-2mm。
Lamination width definition respectively has the summation that sector width is isolated on one side including main grid line width and main gate line two sides.Implement
Example, by taking lamination width is 1mm as an example, typical design is main grid line width 0.6mm, and two sides isolated area is all 0.4mm, isolated area
Belong to two baby battery pieces up and down.Reasonable dispensing aperture is 0.1~0.3mm, in the main gate line coated on 0.5mm width.
After high-temperature soldering, all diffusion is coated on main gate line region for conducting resinl or solder paste composition, and isolated area prevents its diffusion excessive.Consider
To the mutual restricting relation of dispensing accuracy and speed, dispensing speed and stability are influenced when dispensing aperture attenuates, at present minimum aperture
Diameter is in 0.1mm.Dispensing disalignment amount is +/- 0.05mm, and main grid line width should not be less than 0.4mm.Laser dicing center line
Offset is +/- 0.05mm, and incisory isolation sector width should not be less than 0.4mm.Amounting to lamination sector width should be greater than being equal to
1mm.Lamination sector width current technology may be implemented 1.4mm steady production, amplification reserve to 2m, then big then nonsensical, only
It is waste cell piece.
In practical applications, at least two panels battery blade unit head and the tail overlap into a string of battery blade unit groups, it is described too
Positive energy battery component includes that (usual each component includes 3 to 12 string battery blade units arranged side by side at least a string of battery blade unit groups
Group), every string battery blade unit group includes 2-60 piece battery blade unit.
In general, the battery blade unit group is at least two strings, busbar is equipped between battery blade unit group by battery
Blade unit group carries out series, parallel, connected after part in parallel again or sections in series after it is in parallel again.
In some embodiments, lead-out wire is set between busbar and battery blade unit group, a part of lead-out wire with
The front main grid line or reverse side main gate line of the outermost a piece of battery blade unit of battery blade unit group are electrically connected, another part
To the outside extension far from battery blade unit group, (extension, extension with busbar for connecting, and sometimes, extension can
To be used as busbar or busbar and lead-out wire are integrally formed), and be electrically connected with busbar.Shown in embodiment,
It can also be used as busbar and a kind of integrally formed example of lead-out wire, busbar is equipped with interconnecting piece and lead division, the connection
Portion's same trend of front or back main gate line connected to it, the lead division are vertical with the interconnecting piece or at an obtuse angle or sharp
Angle.
In certain embodiments, when busbar is directly connect with positive and negative main gate line, busbar and battery blade unit main gate line
Between connection width be more than or equal to 0.6mm.When between busbar and battery blade unit group be arranged lead-out wire when, lead-out wire with
Connection width between battery blade unit main gate line is more than or equal to 0.6mm.This width refers to busbar or lead-out wire covering
The width of positive and negative main gate line length direction.In this way, 1,2 can be arranged in the same front main grid line or reverse side main gate line
A, 3 or multiple lead-out wires or busbar tie point while guaranteeing enough current transmission capacity, reduce busbar or draw
The area and usage amount of outlet, save the cost.5 lead-out wires are equipped between busbar and front main grid line.
In some embodiments, when busbar and lead-out wire are integrally formed, busbar is as the partially folded of lead-out wire
In the back side of battery blade unit group, and it is provided with layer and it is isolated with the cell piece back side.When busbar and lead-out wire are independent
When preparation, the outermost front main grid line of battery blade unit group is connect (here just by battery blade unit group with lead-out wire
Face is placed on the lower section of diagram, and reverse side is above, it is only for drawing is convenient), lead-out wire is connect with busbar again, in reality
When prepared by border, lead-out wire connection busbar is folded to the reverse side (being exactly the back side) of battery blade unit group together, and be provided with absolutely
It is isolated edge layer with the cell piece back side.It can reduce lead-out wire in this way and busbar occupy the positive area of component, contract
The size of Sunny energy battery component is also more beautiful.
In general, the lead-out wire of every a string of cell pieces unit group being connect with front main grid line or with reverse side main grid
The interconnecting piece at least two of the lead-out wire of line, lead division, which is reconnected, draws main line in same.Interconnecting piece is 5.
In some embodiments, when carrying out the assembling of solar cell module, adjacent cell blade unit group the same side is most
The main gate line polarity of outer end is different, i.e. front main grid line and reverse side main gate line is intervally arranged, is equivalent to adjacent cell piece list
Tuple be inverted arrangement, be similar to by dry cell polarity interval be inverted after parallel arrangement, wherein all front main grid lines of side with
Reverse side main gate line is connected to same and draws main line, and all front main grid lines of the other side are connected to a front main grid line and draw
Main line out, all reverse side main gate lines are connected to a reverse side main gate line and draw main line, and front main grid line draws main line and reverse side master
Grid line draws total output lead-out wire of the main line as solar cell module, and battery blade unit group (i.e. battery strings) polarity interval is fallen
Arrangement is set, example is six string battery blade unit groups, and the upper end output of a string of battery blade unit groups of the leftmost side is reverse side main gate line,
Lower end is front main grid line, and the adjacent battery blade unit group in the right then place by polarity inversion, and upper end is front main grid line, lower end
For reverse side main gate line, and so on, the front main grid line and reverse side main gate line for being arranged in upper end are electrically connected with together, and are arranged
Front main grid line in lower end is electrically connected through lead-out wire and return wire, as solar cell module output electrode it
One, and the reverse side main gate line for being arranged in lower end is also electrically connected through other lead-out wire and busbar, as solar-electricity
Another electrode of pond component output.Example is only one of series-parallel system between numerous battery blade unit groups, remaining
Connection type will be readily apparent, and repeat no more.
As described above, can draw by the lead-out wire being connect with front main grid line of battery blade unit group or with reverse side main gate line
Outlet folding is placed in the back side of battery blade unit group, and the front main grid line draws main line and reverse side main gate line is drawn and led
Line is also disposed on the back side of battery blade unit group, and draws main line, the extraction of reverse side main gate line in lead-out wire and front main grid line
Setting is dielectrically separated from component between main line and the back side of battery blade unit group.To reduce lead-out wire and busbar to solar battery
The occupancy of component front face area reduces size of components.
The invention also discloses a kind of manufacture crafts of battery blade unit, make above-mentioned battery blade unit, specifically include
Following steps:
One, it prints: respectively corresponding printing front silk screen figure and reverse side silk screen figure on the positive and negative of silicon wafer, it is described
Front silk screen figure includes thin grid line and the front main grid line perpendicular with the thin grid line, the front main grid line uniform intervals
Setting, and along the length direction of the thin grid line, the edge of the side of the front silk screen figure is provided with front edge main grid
Line；
The reverse side silk screen figure includes reverse side main gate line and Al-BSF, the reverse side main gate line and the front main grid line
Direction is consistent, and uniform intervals are arranged, and the edge of the side of the reverse side silk screen figure is provided with opposite longitudinal side edge main gate line, described
Front edge main gate line and opposite longitudinal side edge main gate line are located at the opposite sides of the silicon wafer；
Two, it cuts: being cut using cutting equipment along cutting line, form battery blade unit described in multi-disc；
Wherein, the cutting line is used to silicon wafer being cut into independent battery blade unit；
Three, it is bonded: the front main grid line of first battery blade unit being coated into electrically conductive binding material, by second cell piece
The reverse side main gate line of unit is covered in the front main grid line of first battery blade unit, completes the viscous of two panels battery blade unit
Knot；Third piece battery blade unit and second bonding way are identical as the bonding way of first and second later, with this
Analogize, until all battery blade units bonding finishes, completes the production of solar battery sheet.
Further, the electrically conductive binding material in the step 3 is conducting resinl or solder(ing) paste or conductive tape or welding.
Further, in the step 2, the cutting line is respectively positioned on the same side of the front main grid line, and with it is described
The outer edge of front edge main gate line is consistent.
It makes solar cell module and battery blade unit of the present invention and is related to a kind of solar battery sheet, including Al-BSF
Coating, silicon wafer layer and thin grid line, the solar battery sheet front are divided at least two independent regions, each region its
Middle a side along or the neighbouring edge be equipped at least one front main grid line, all thin grid lines in the front in the region all with this
The corresponding electrical connection of the front main grid line in region.Here isolated area is a battery blade unit, it can cut down solely
It is vertical to use, it can not also cut, be carried out using conducting wire (or lead-out wire) series-parallel between battery blade unit.
Solar battery sheet mentioned here is an essential element for being used to prepare solar cell module, in tradition
Production technology in, this solar battery sheet includes silicon wafer, Al-BSF coating, front thin grid line, three or four longitudinal directions
Main gate line when preparing solar cell module needs that the main grid wire bonding of multiple solar battery sheets is connected with welding
Get up, and each energy conversion unit of usually existing solar battery on piece is to be connected as one by thin grid line and main gate line
Whole, every main gate line is collected simultaneously the electric current of left and right sides energy conversion unit.Solar battery on piece of the invention
Main gate line is laterally arranged, and solar battery sheet is divided into mutually independent at least two region, and each region is only
One front main grid line is set, and it is single that every main gate line only collects the conversion of one's respective area (side for being only located at the front main grid line) energy
The electric current of member, in order to improve the transfer efficiency of energy, this region is the smaller the better, and the path of thin in this way grid line to main gate line is got over
Short, the efficiency for collecting conversion is higher, is limited by technique and cost, is preferably selected between 2-6 isolated area, can also
According to actual needs, to prepare the solar battery sheet of 7 and area above.Solar battery sheet of the invention is in solar energy group
In the application and preparation of part, there is higher flexibility, be exemplified below: 1, each region can be cut into the independent sun one by one
Can battery blade unit, the mode string that serial arrangement can be used in the connection between each solar battery blade unit, head and the tail are staggeredly superimposed
The main gate line of every a piece of solar battery sheet unit, is such as placed in the top of entire solar battery blade unit, by each unit by connection
Piece is successively arranged from top to bottom, and upper a piece of lower edge just rides over the upper edge of next unit piece, and just covers next unit piece
Main gate line, and the main gate line of next unit piece and the back side anode of upper unit piece are electrically connected, and so on, will own
Unit piece be together in series, in this way, solar cell module front do not appear main gate line, no main gate line occupies effective sky
Between, so that effective generating area of entire solar cell module increases, and no longer need to connect using welding, has abandoned weldering
The increase of band connection bring process, occupies the drawbacks of effective generating area at increased costs.2, staggeredly superposition is arranged in the manner described above
Cloth, but front main grid line is dielectrically separated from upper a piece of back positive electrode, the front main grid lines of all unit pieces in side or
The back side all links together, and the back positive electrode of all units also links together, and finally draws respectively, that is, is formed and be coupled
The modular construction of structure.As shown in Figure 3.More combination selections are brought in this way for the circuit structure of entire component.3, by above-mentioned two
Kind connection type carries out any combination, available assembly circuit form more abundant.4, can use connecting line will be a certain
The front main grid line in region and the rear electrode in another region connect, in this way, cutting cell piece can not had to, it first will be a piece of
Above solar battery sheet each region series or in parallel or series, Hybrid connections in parallel get up, then again by multi-disc solar-electricity
Pond piece is connected, and the installation of a solar cell module is finally completed.
Further, the solar cell back face corresponds to front surface region and is located at solar battery sheet and just faces
Answer other side edge that the main gate line in region is opposite or the neighbouring edge to be equipped with back side main gate line, the back side main gate line with it is corresponding
The rear electrode of region solar battery sheet is electrically connected.
Further, being equipped with one between each region in the solar battery sheet front makes electrical isolation between adjacent area
Isolation strip.
Further, it is not provided in the part that the back side of the solar battery sheet corresponds to the positive isolation strip position
Al-BSF coating.
Further, correspond to the position between each region in front, setting at the back side of the solar battery sheet
The cut-off rule for being not provided with Al-BSF coating of strip or threadiness.
Further, the front main grid line in outermost two regions in the solar battery sheet front, is set to the sun
It can cell piece outermost edge or close outermost edge.
Further, the front main grid line includes weld part and interconnecting piece, and the width of the weld part is greater than interconnecting piece
Width, connected by interconnecting piece between the weld part, the front main grid line be a perforation single grid line or two or more
The grid line that item is separated from each other.
Further, it is additionally provided between the thin grid line perpendicular to thin grid line and by the thin grid of transverse direction of adjacent thin grid line connection
Line.
Above-mentioned silicon wafer is a semifinished part, can directly be purchased, its general preparation process, specifically includes the following steps:
One, silicon wafer detects；
Two, surface wool manufacturing；
Three, diffusion；
Four, phosphorosilicate glass is removed；
Five, battery edge PN junction is removed；
Six, antireflective coating is prepared.
Just it is related to the preparation of front main grid line and reverse side main gate line (or being back side main gate line) and the thin grid line in front later.
Design requirement according to the present invention the following steps are included:
(1), front electrode is printed: corresponding printing front silk screen figure, the front silk screen figure on the front of silicon wafer
Cell piece is divided at least two regions, each region includes thin grid line and the front main grid that is connected with the thin grid line
Line, the front main grid line parallel interval setting of different zones, wherein being located at the front main grid line in two regions at cell piece edge
It is respectively arranged at the edge of cell piece or close to edge；
(2), printed back Al-BSF: in the corresponding printing reverse side silk screen figure in the back side of silicon wafer, including reverse side main gate line and
Al-BSF, the reverse side main gate line is parallel with the front main grid line, each corresponding positive region is respectively provided with a back side
Main gate line, and back side main gate line is located at side of the region far from front main grid line；
Eight, it is sintered.
Further, the front main grid line per a piece of cell piece unit is overlapped with the reverse side main gate line of adjacent cell blade unit
It stacks, the width that adjacent two panels battery blade unit overlaps is 0.9-2mm.
Further, at least two panels battery blade unit head and the tail overlap into a string of battery blade unit groups, the solar energy
Battery component includes at least a string of battery blade unit groups, and every string battery blade unit group includes 2-60 piece battery blade unit.
Further, the battery blade unit group is at least two strings, and busbar is equipped between battery blade unit group by battery
Blade unit group carries out series, parallel, connected after part in parallel again or sections in series after it is in parallel again.
The solar battery sheet referred in the respective embodiments described above is prepared using this preparation method, above method preparation
Solar battery sheet, both can be used for cutting battery blade unit, can also directly be connected using connecting line or other connection types
Each solar battery sheet is connected into composition solar battery sheet group again after connecing the front main grid line and rear electrode in each region
Part.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (16)
1. a kind of battery blade unit, cut by solar battery sheet and obtained, every solar battery sheet can at least be divided into
Few two panels battery blade unit, the battery blade unit includes obverse and reverse, and the front is provided with power generation area and is set to institute
The front main grid line of power generation area side long side edge is stated, several thin grid lines, the thin grid line and institute are provided in the power generation area
Front main grid line is stated to be connected；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line
It is located at the opposite sides of the battery blade unit；It is characterized in that, where the front main grid line and reverse side main gate line
The boundary of battery blade unit long side is projected as curve, broken line where two battery blade unit long sides, wherein at least reverse side main gate line,
Or two or three of combination in curve, broken line, straight line.
2. battery blade unit according to claim 1, which is characterized in that the curve, broken line or curve, broken line, straight line
In two or three of combination, boundary projection be in cyclically-varying.
3. battery blade unit according to claim 1, which is characterized in that the curve, broken line or curve, broken line, straight line
In two or three of combination, the highest point and the lowest point of the boundary projection of battery blade unit long side where reverse side main gate line it
Between vertical range be greater than 0, the vertical range refers to two for passing through the highest point and the lowest point respectively and being parallel to each other
Vertical range between straight line, also, this two straight lines are vertical with two short sides of battery blade unit.
4. battery blade unit according to claim 1, which is characterized in that the reverse side main gate line is multistage, every section of reverse side
The inside of the highest point of the boundary projection of battery blade unit long side where the position of main gate line arrangement corresponds to reverse side main gate line.
5. battery blade unit according to claim 4, which is characterized in that the front main grid line be multistage, position with
Each section of reverse side main gate line one-to-one correspondence.
6. battery blade unit according to claim 5, which is characterized in that be provided with connection grid between each section of front main grid line
Line and/or power generation area are equipped at least one transverse direction thin grid line parallel with battery blade unit long side, and laterally thin grid line connects institute
Some thin grid lines in longitudinal direction are connect with longitudinal thin corresponding front main grid line of grid line of each section of front main grid line corresponding position.
7. a kind of solar cell module, which is characterized in that the battery blade unit group including at least a string vertical or horizontal arrangements,
Every string battery blade unit group includes at least two panels battery blade unit, and with a string of cell piece cell bodies, successively locally overlapping is arranged
Cloth, the battery blade unit includes obverse and reverse, and the front is provided with power generation area and to be set to the power generation area side long
The front main grid line at side edge is provided with several thin grid lines, the thin grid line and the front main grid line phase in the power generation area
Connection；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at the electricity
The opposite sides of pond blade unit；Two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein extremely
The boundary of battery blade unit long side where few reverse side main gate line is projected as curve, broken line or curve, broken line, two kinds in straight line
Or three kinds of combination；
When battery blade unit is two panels, wherein the front main grid line of a piece of battery blade unit overlaps other a piece of cell piece list
In the reverse side main gate line of member, and it is conductively connected；Wherein, the width of the overlapping region of two panels battery blade unit is in cyclically-varying,
Or aperiodicity change；
When battery blade unit is greater than two panels, the front main grid line of battery blade unit successively overlaps adjacent a piece of battery blade unit
Reverse side main gate line on, and be conductively connected；Wherein, the width of the overlapping region of adjacent two panels battery blade unit is in periodically change
Change or aperiodicity change.
8. solar cell module according to claim 7, which is characterized in that the reverse side main gate line be multistage, every section
The position of the highest point of the boundary projection of battery blade unit long side where the position of reverse side main gate line arrangement corresponds to reverse side main gate line
It sets.
9. solar cell module according to claim 8, which is characterized in that the front main grid line is multistage, position
It sets and is corresponded with each section of reverse side main gate line.
10. solar cell module according to claim 9, which is characterized in that be provided between each section of front main grid line
It connects grid line and/or power generation area is equipped at least one transverse direction thin grid line parallel with battery blade unit long side, laterally thin grid line
The thin grid line in all longitudinal directions is connected, the corresponding front main grid line of longitudinal thin grid line with each section of front main grid line corresponding position
Connection.
11. a kind of preparation method of solar cell module, which comprises the following steps:
The first step prepares battery blade unit, and solar battery sheet is cut into the battery blade unit of two panels or two panels or more, institute, institute
Stating battery blade unit includes obverse and reverse, and the front is provided with power generation area and is set to power generation area side long side edge
Front main grid line, be provided with several thin grid lines in the power generation area, the thin grid line is connected with the front main grid line；Institute
It states reverse side and is provided with reverse side main gate line and Al-BSF, and front main grid line and reverse side main gate line are located at the battery blade unit
Opposite sides；Two battery blade unit long sides where the front main grid line and reverse side main gate line, wherein at least reverse side master
The boundary of battery blade unit long side where grid line is projected as curve, broken line or curve, broken line, two or three in straight line
Combination；
Battery blade unit more than two panels or two panels is connected into battery string location by second step in the way of imbrication, with a string
Battery blade unit successively local overlapping arrangement, the battery blade unit includes obverse and reverse, and the front is provided with power generation
Area and the front main grid line for being set to power generation area side long side edge are provided with several thin grid lines, institute in the power generation area
Thin grid line is stated to be connected with the front main grid line；The reverse side is provided with reverse side main gate line and Al-BSF, and front main grid line
The opposite sides of the battery blade unit is located at reverse side main gate line；
When battery blade unit is two panels, wherein the front main grid line of a piece of battery blade unit overlaps other a piece of cell piece list
In the reverse side main gate line of member, and it is conductively connected；Wherein, the width of the overlapping region of two panels battery blade unit is in cyclically-varying,
Or aperiodicity change；
When battery blade unit is greater than two panels, the front main grid line of battery blade unit successively overlaps adjacent a piece of battery blade unit
Reverse side main gate line on, and be conductively connected；Wherein, the width of the overlapping region of adjacent two panels battery blade unit is in periodically change
Change or aperiodicity change；
Multiple battery string locations are connected and are encapsulated as required solar energy according to the needs of solar cell module by third step
Battery component.
12. the preparation method of solar cell module according to claim 11, which is characterized in that the reverse side main gate line
For multistage, the boundary of battery blade unit long side is projected where the position of every section of reverse side main gate line arrangement corresponds to reverse side main gate line
The inside of highest point.
13. the preparation method of solar cell module according to claim 12, which is characterized in that the front main grid line
For multistage, position and each section of reverse side main gate line one-to-one correspondence.
14. the preparation method of solar cell module according to claim 13, which is characterized in that each section of front main grid line
Between be provided with connection grid line and/or power generation area and be equipped at least one transverse direction thin grid line parallel with battery blade unit long side,
Laterally thin grid line connects the thin grid line in all longitudinal directions, corresponding with longitudinal thin grid line of each section of front main grid line corresponding position
Front main grid line connection.
15. the preparation method of solar cell module according to claim 13, which is characterized in that in the first step,
It is further comprising the steps of,
One, it prints: respectively corresponding printing front silk screen figure and reverse side silk screen figure, the front on the positive and negative of silicon wafer
Silk screen figure includes thin grid line and the front main grid line perpendicular with the thin grid line, and the front main grid line uniform intervals are set
It sets, and along the length direction of the thin grid line, the edge of the side of the front silk screen figure is provided with front edge main gate line；
The reverse side silk screen figure includes reverse side main gate line and Al-BSF, the reverse side main gate line and the front main grid line direction
Unanimously, and uniform intervals are arranged, and the edge of the side of the reverse side silk screen figure is provided with opposite longitudinal side edge main gate line, the front
Edge main gate line and opposite longitudinal side edge main gate line are located at the opposite sides of the silicon wafer；
Two, it cuts: being cut using cutting equipment along cutting line, form battery blade unit described in multi-disc；
Wherein, the cutting line is used to silicon wafer being cut into independent battery blade unit.
16. a kind of preparation method of battery blade unit, comprising the following steps:
Cut-off rule is arranged in the first step, in the size or quantity setting segmentation that solar battery on piece is needed according to battery blade unit
Line, cut-off rule are located between adjacent cell blade unit long side and consistent with long side boundary shape；And each battery blade unit of printing
Front main grid line, reverse side main gate line and power generation area thin grid line；The battery blade unit includes obverse and reverse, the front
It is provided with power generation area and is set to the front main grid line of power generation area side long side edge, be provided in the power generation area several
Thin grid line, the thin grid line are connected with the front main grid line；The reverse side is provided with reverse side main gate line and Al-BSF, and just
Face main gate line and reverse side main gate line are located at the opposite sides of the battery blade unit；The front main grid line and reverse side main grid
The boundary of battery blade unit long side is projected as song where two battery blade unit long sides where line, wherein at least reverse side main gate line
Line, broken line or curve, broken line, two or three of combination in straight line；
Second step prepares battery blade unit, is cut according to cut-off rule, obtains battery blade unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113206160A (en) * | 2020-01-15 | 2021-08-03 | 泰州隆基乐叶光伏科技有限公司 | Laminated tile assembly and production method thereof |
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