CN104835874A - Production method of half-cell photovoltaic assembly - Google Patents
Production method of half-cell photovoltaic assembly Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims description 22
- 239000011159 matrix material Substances 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 230000011218 segmentation Effects 0.000 claims description 6
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010030 laminating Methods 0.000 abstract description 2
- 238000004382 potting Methods 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 54
- 238000010586 diagram Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010926 waste battery Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 235000008216 herbs Nutrition 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000013083 solar photovoltaic technology Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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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
- H01L31/18—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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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a production method of a half-cell photovoltaic assembly belonging to the photovoltaic cell field. The production method is characterized in that A. a size of a solar cell can be processed to be 125mm*62.5mm, or 156mm*78mm, and can be connected with an electrode in a welded manner to form the half-cell solar cell; B. a connecting way is provided; C. a combination way is provided; D. a plurality of laminated films can be disposed on a cover plate film by using a laminating machine, and then the connecting wire between the half cells can be isolated from the outside; E. the wiring opening can be sealed by adopting the potting technology, and the positive pole and the negative pole of the cell assembly can be connected with binding posts; F. the frame can be assembled, and by adopting the method, the maximum power can be improved by 3% to 6%.
Description
Technical field
The present invention relates to a kind of manufacture method of photovoltaic module, particularly a kind of manufacture method of half-cell sheet photovoltaic module, belongs to photovoltaic cell field.
Background technology
Along with being on the rise of world energy sources crisis and problem of environmental pollution, related personnel accelerates the research of solar photovoltaic technology, and has promoted the development of solar-energy photo-voltaic cell and Module Manufacture Technology.The photovoltaic module accounting for the market share more than 90% is at present crystal silicon photovoltaic battery component, its basic composition unit is the square of 125mm × 125mm or 156mm × 156mm size or the Monocrystalline silicon cell piece of rounded square or polycrystalline silicon battery plate, in solar-energy photo-voltaic cell industry, general in the connection of battery component, little string is become by after the cell piece series connection in same row or column, middle string is referred to as afterwards by after adjacent two little connection in series-parallel, then the string formed after the whole serial or parallel connection of described middle string is referred to as large string, this title also can be used in the middle of the connection of cell piece in an assembly.But, (such as 6 row * 10 row=60 slice, 8 row * 12 row=96 slice etc.) after the arrangement of the cell piece matrix of some these specifications mainly all connect by crystal silicon solar batteries sheet photovoltaic cell component, then encapsulate, both positive and negative polarity is drawn the structure of terminal box, the stable output power of the solar photovoltaic assembly of this structure, numerically certain, there is no too large difference.But, from current present situation, the conversion efficiency of solar photovoltaic assembly is still in a kind of lower-order section, compared with theoretical conversion efficiencies, have a certain distance, the power output that how can improve unit are photovoltaic module is the direction of industry effort always, improves conversion efficiency in current solar-energy photo-voltaic cell industry mainly through following two kinds of methods, one is improve the conversion efficiency of monolithic battery, and two is reduce the power loss that encapsulation factor causes as far as possible.In addition, because solar cell is that semiconductor silicon is made, through cutting, grinding, making herbs into wool, diffusion, etching, antireflective, printing, dry, machining and the including high temperature processes such as sintering, solar battery sheet in the fabrication process, although try one's best by Stress Release wherein out, but, still how much can in some position, there is certain stress, in the fabrication process can because of equipment or human factor, solar-energy photo-voltaic cell sector-meeting occurs that incompleteness is judged to substandard product because of certain angle, for these products, because the price of silicon product is very expensive, if only discard whole cell piece with this point, somewhat unfortunate, because this cell piece still can play the effect of generating, if this part solar-energy photo-voltaic cell sheet fully utilizes can be Reducing Cost in Enterprises, improve effects plays a role.In package power loss, the assembly own power loss caused due to the existence of assembly internal resistance accounts for greatly.In the internal resistance of photovoltaic module is formed, the internal resistance of cell piece occupies major part, and substantially remains unchanged, if the electric current by cell piece is reduced half, so according to Joule law, its internal resistance power loss is by reduction by 1/4th.
Summary of the invention
Photoelectric conversion rate for solar photovoltaic assembly is relatively low, the present situation that expensive incomplete solar battery sheet can not make full use of, the invention provides a kind of manufacture method of half-cell sheet photovoltaic module, its objective is the photoelectric conversion rate in order to improve solar cell, the solar battery sheet generating utilizing local incomplete, improves the utilance of silicon chip.
Technical scheme of the present invention is: a kind of manufacture method of half-cell sheet photovoltaic module, comprises the substrate arranging solar battery sheet, and half-cell sheet photovoltaic module comprises following manufacturing step:
A. the size of solar battery sheet is processed into 125mm × 62.5mm or 156mm × 78mm respectively, and welding electrode, form half-cell sheet;
B. according to any one in following several connected mode, on substrate, double cell piece connects:
B1. be connected in series between the half-cell sheet in whole solar module, carry out tandem comprising the order by row/column;
b2. parallel connection between the half-cell sheet be connected in series by row/column by after row/column serial connection and other half between the half half-cell sheet in whole solar module, comprising two, the left and right half half-cell sheet of two half-sum longitudinally center line segmentations up and down of transversely center line segmentation, the quantity between described upper and lower two half or two, left and right half half-cell sheet is equal;
b3. go here and there in formation in parallel between adjacent two column/rows after the interior serial connection of each column/row in whole solar module, the middle string after parallel connection is connected again with other, is formed and goes here and there greatly;
c. in order to reach the connected mode in B1, B2 and B3, described half-cell sheet matrix arrangement mode can be divided into following several, can realize a connected mode in above-mentioned step B according to any one matrix arrangement mode wherein:
C1. the length and width direction of described half-cell sheet and the length and width direction of substrate are that consistent direction arranges;
C2. the length and width direction of described half-cell sheet and the length and width direction of substrate arrange in vertical direction;
C3. the odd number column/row of described half-cell sheet is contrary with the electrode direction of even column/line number;
C4. with the width center line of substrate for assembly is divided into left and right two parts by symmetry axis, the odd column of the half-cell sheet of every part is contrary with the electrode direction of even column;
C5. with the length center line of substrate for assembly is divided into upper and lower two parts by symmetry axis, the odd column of the half-cell sheet of every part is contrary with the electrode direction of even column;
C6. with the width center line of substrate for assembly is divided into symmetrical two parts by symmetry axis, every part outermost adjacent two row electrode direction identical, if any the 3rd row then contrary with tertial electrode direction,
Further, described half-cell sheet number of permutations be in assembly X row × Y capable=N sheet, wherein X is matrix columns, and Y is matrix line number and X, Y are positive integer, and meet 8≤X≤16,12≤Y≤24, X≤Y,
Further, described half-cell sheet comprises Monocrystalline silicon cell piece, polycrystalline silicon battery plate, silicon/crystalline silicon heterojunction electricity sheet pond, fourchette back contact battery sheet, emitter perforation winding battery sheet.
Manufacture method in this invention can utilize by using half-cell the half-cell sheet being of a size of cell piece size 125mm × 125mm or 156mm in prior art × 156mm half, can waste battery sheet be wanted to make full use of a part in prior art, turn waste into wealth, by some half-cell sheets are carried out regular connection in series-parallel combination by cathode and anode directions, finally be packaged together and form described half-cell photovoltaic module, the own power loss caused due to photovoltaic module internal resistance can be effectively reduced, thus improve the power stage of photovoltaic module, utilize the combination of this half-cell sheet compared with the combination of existing cell piece, maximum power can improve 3%-6%, achieve higher photoelectric conversion rate.
Accompanying drawing explanation
Accompanying drawing 1 is the solar energy crystal-silicon battery slice schematic diagram of prior art.
Accompanying drawing 2 is half-cell schematic diagrames.
Accompanying drawing 3 is the prior art assembly schematic diagrames arranged according to 4 row × 9 row by 36 prior art completed cell sheets.
Accompanying drawing 4 to be arranged according to 4 row × 18 row by 72 half-cells and connected mode is in parallel half-cell assembly schematic diagram of connecting again after first connecting.
Accompanying drawing 5 to be arranged according to 4 row × 18 row by 72 half-cells and connected mode is that first connect the half-cell assembly schematic diagram of left and right portion parallel connection respectively in left and right portion again.
Accompanying drawing 6 to be arranged according to 4 row × 18 row by 72 half-cells and connected mode is first upper and lower part connects respectively the half-cell assembly schematic diagram of upper and lower part parallel connection again.
Accompanying drawing 7 is the prior art assembly schematic diagrames arranged according to 5 row × 10 row by 50 prior art completed cell sheets.
Accompanying drawing 8 to be arranged according to 10 row × 10 row by 100 half-cells and connected mode is in parallel half-cell assembly schematic diagram of connecting again after first connecting.
Accompanying drawing 9 is the prior art assembly schematic diagrames arranged according to 6 row × 10 row by 60 prior art completed cell sheets.
Accompanying drawing 10 to be arranged according to 6 row × 20 row by 120 half-cells and connected mode is in parallel half-cell assembly schematic diagram of connecting again after first connecting.
Accompanying drawing 11 to be arranged according to 6 row × 20 row by 120 half-cells and connected mode is that first connect respectively again by the half-cell assembly schematic diagram of left and right part in parallel in left and right portion.
Accompanying drawing 12 to be arranged according to 6 row × 20 row by 120 half-cells and connected mode is first upper and lower part connects respectively the half-cell assembly schematic diagram of upper and lower part parallel connection again.
Embodiment
For a better understanding of the present invention, by reference to the accompanying drawings, provide concrete execution mode, the present invention is not limited to this concrete embodiment.
Referring to Fig. 1-Figure 12, just detailed being described of technical scheme of the present invention, in figure, 100: solar battery sheet, 200: half-cell sheet, 101: prior art solar battery sheet positive pole, 102: prior art solar battery sheet negative pole, 201: half-cell sheet positive pole, 202: half-cell sheet negative pole, Fig. 3, Fig. 7, Fig. 9 is the solar module after utilizing varying number cell piece to be connected in series in prior art, wherein, and the positive pole after 301:36 sheet cell piece serial connection, negative pole after 302:36 sheet cell piece serial connection, positive pole after 701:50 sheet cell piece serial connection, negative pole after 702:50 sheet cell piece serial connection, positive pole after 901:60 sheet cell piece serial connection, negative pole after 902:60 sheet cell piece serial connection, Fig. 4, Figure 10 be by adjacent two row little connection in series-parallel after again centering string series connection connection half solar module, wherein, 401:72 sheet half-cell sheet assembling after positive pole, negative pole after the assembling of 402:72 sheet half-cell sheet, positive pole after the assembling of 1001:120 sheet half-cell sheet, 1002:120 sheet half-cell sheet assembling after negative pole, Fig. 8 be by after little for every adjacent rows connection in series-parallel again to the half-cell chip module of connecting in row, wherein, 801:100 sheet half-cell sheet assembling after positive pole, negative pole after the assembling of 802:100 sheet half-cell sheet, Fig. 5, Fig. 6, Figure 11, Figure 12 be by after the half half-cell sheet serial connection in assembly again with the assembly drawing of an other mid-shunt, wherein, the positive pole after the assembling of 501:72 sheet half-cell sheet, negative pole after the assembling of 502:72 sheet half-cell sheet, positive pole after the assembling of 601:72 sheet half-cell sheet, positive pole after negative pole 1101:120 sheet half-cell sheet assembling after the assembling of 602:72 sheet half-cell sheet, negative pole after the assembling of 1102:120 sheet half-cell sheet, negative pole after the assembling of 1201:120 sheet half-cell sheet, positive pole after the assembling of 1202:120 sheet half-cell sheet.
A manufacture method for photovoltaic module, comprises the substrate arranging solar battery sheet, and the manufacturing step of photovoltaic module is as follows:
a.the size of solar battery sheet is processed into respectively 125mm × 62.5mm or solar battery sheet 156mm × 78mm, and welding electrode, form half-cell sheet, that is the size used in this invention is the half-cell sheet of prior art cell piece size 125mm × 125mm or 156mm × 156mm half, therefore, half-cell sheet is referred to as in the present invention;
b.when described half-cell sheet is arranged on substrate, there is multiple connected mode, when carrying out the half-cell sheet connection of photovoltaic module, can according to any one in following several connected mode, double cell piece connects:
b1.be connected in series between half-cell sheet in whole solar module, tandem is carried out comprising the order by row/column, it is mostly the mode that have employed this entirety series connection in prior art, wherein, Fig. 3, Fig. 7, Fig. 9 is exactly the mode that make use of this entirety serial connection, it is all the structure chart that the positive pole 101 of cell piece 100 of the prior art is connected with another one prior art solar battery sheet negative pole 102, wherein, 301 is the positive poles in Fig. 3 after 36 cell piece serial connections, 302 is the negative poles in Fig. 3 after 36 cell piece serial connections, 701 is the positive poles in Fig. 7 after 50 cell piece serial connections, 702 is the negative poles in Fig. 7 after 50 cell piece serial connections, 901 is the positive poles in Fig. 9 after 60 cell piece serial connections, 902 is the negative poles in Fig. 9 after 60 cell piece serial connections,
b2. parallel connection between the half-cell sheet be connected in series by row/column by after row/column serial connection and other half between the half half-cell sheet in whole solar module, comprising two, the left and right half half-cell sheet of two half-sum longitudinally center line segmentations up and down of transversely center line segmentation, the quantity between described upper and lower two half or two, left and right half half-cell sheet is equal, wherein, Fig. 5, Figure 11 be by assembly with horizontal edge center line for symmetry axis, first by after the half half-cell sheet serial connection in the two parts of left and right again with the assembly drawing of an other mid-shunt, Fig. 6, Figure 12 be by assembly with longitudinal edge center line for symmetry axis, first by after the half half-cell sheet serial connection in upper and lower two parts again with the assembly drawing of an other mid-shunt, wherein, 601 is the positive poles in Fig. 6 after 72 half-cell sheet assemblings, 602 is the negative poles in Fig. 6 after 72 half-cell sheet assemblings, 1101 is the positive poles in Figure 11 after 120 half-cell sheet assemblings, 1102 is the negative poles in Figure 11 after 120 half-cell sheet assemblings, 1201 is the negative poles in Figure 12 after 120 half-cell sheet assemblings, 1202 is the positive poles in Figure 12 after 120 half-cell sheet assemblings,
b3. in parallel between adjacent rows/row after serial connection in each column/row in whole solar module, the middle string after parallel connection is connected again with other, is formed and goes here and there greatly, wherein, Fig. 4, Figure 10 be by every two row little connection in series-parallel after again to row in series connection half solar module, Fig. 8 is by half solar module of centering string series connection again after the little connection in series-parallel of every two row, 401 is the positive poles in Fig. 4 after 72 half-cell sheet assemblings, 402 is the negative poles in Fig. 4 after 72 half-cell sheet assemblings, 1001 is the positive poles in Figure 10 after 120 half-cell sheet assemblings, 1002 is the negative poles in Figure 10 after 120 half-cell sheet assemblings, 801 is the positive poles in Fig. 8 after 100 half-cell sheet assemblings, 802 is the negative poles in Fig. 8 after 100 half-cell sheet assemblings,
c. in order to reach the connected mode in B1, B2 and B3, described half-cell sheet matrix arrangement mode can be divided into following several arrangement mode, can realize a connected mode in above-mentioned step B according to any one matrix arrangement mode wherein:
c1.the length and width direction of described half-cell sheet and the length and width direction of substrate are that consistent direction arranges, and Fig. 8 belongs to the photovoltaic module of this half-cell sheet;
c2.the length and width direction of described half-cell sheet and the length and width direction of substrate arrange in vertical direction, and Fig. 4, Fig. 5, Fig. 6, Figure 10, Figure 11, Figure 12 belong to the photovoltaic module of this half-cell sheet;
c3.the odd number column/row of described half-cell sheet matrix is contrary with the electrode direction of even column/line number, and wherein Fig. 6 and Figure 12 belongs to the photovoltaic module of this kind of half-cell sheet;
c4.with the width center line of substrate for assembly is divided into symmetrical two parts by symmetry axis, the odd column of the half-cell sheet of every part is contrary with the electrode direction of even column, Fig. 5 and Figure 11 also belongs to the photovoltaic module of this kind of half-cell sheet;
c5.with the length center line of substrate for assembly is divided into laterally zygomorphic two parts by symmetry axis, the odd column of the half-cell sheet of every part is contrary with the electrode direction of even number columns, Fig. 6 and Figure 12 is the photovoltaic module of this kind of half-cell sheet;
c6.with the width center line of substrate for assembly is divided into symmetrical two parts by symmetry axis, the electrode direction of outermost adjacent two row of every part is identical, then contrary with tertial electrode direction if any the 3rd row, Fig. 4 and Figure 10 belongs to the photovoltaic module of this kind of half-cell sheet;
d.utilize laminating machine lamination multilayer laminate film on cover-plate glass, and be assembled with the substrate in combination of half-cell sheet, the line between half-cell sheet and half-cell sheet is isolated from the outside;
e.seal at connection jaws encapsulating, the both positive and negative polarity of battery component is connected on binding post;
f.assembling frame,
Further, described half-cell sheet number of permutations be in assembly X row × Y capable=N sheet, wherein X is matrix columns, and Y is matrix line number and X, Y are positive integer, and will meet 8≤X≤16,12≤Y≤24, the condition of X≤Y,
Further, described half-cell sheet comprises Monocrystalline silicon cell piece, polycrystalline silicon battery plate, silicon/crystalline silicon heterojunction electricity sheet pond, fourchette back contact battery sheet, metal piercing winding battery sheet, emitter perforation winding battery sheet.
embodiment 1
Choose solar battery sheet 100 in prior art, be divided into two in the middle of the solar battery sheet 100 of prior art, or the incomplete portion of removing in prior art solar battery sheet 100 obtains the half-cell sheet 200 ading up to 72, these 72 half solar cells are arranged as 4 row=72 slice, row × 18 according to the mode of Fig. 4, and according to first each row 18 half-cell sheets 200 being connected as little string, then adjacent two little connection in series-parallel are middle string, be a string greatly again by series connection in adjacent two, thus form a half-cell photovoltaic module.The prior art solar battery sheet 100 of same batch 36 is utilized to be concatenated into photovoltaic module, the electrical property of the photovoltaic module be assembled into half-cell sheet contrasts, associated technical parameters sees the following form, therefrom can find out, the open circuit voltage of the two and short circuit current basically identical, but, the maximum power ratio general components height about 3.4% of half-cell assembly.
Optionally, 72 half-cell sheets 200 also can according to the mode of Fig. 5,36 of left side half-cell sheets 200 are connected as left part battery strings, be right part battery strings by the series connection of 36 of right-hand part half-cell sheets, then by left part battery strings and right part battery strings in parallel again thus form one and half solar cell photovoltaic assemblies.
Optionally, 72 half-cells also can according to the mode of Fig. 6,36 of first half half-cell sheets 200 are connected as upper cell string, be lower battery string by the series connection of 36 of Lower Half half-cell sheets, then by upper cell string and lower battery string in parallel again thus form one and half solar cell photovoltaic assemblies.
embodiment 2
With reference to Fig. 7, choose the fourchette back contact solar cell sheet 100 of the prior art of the same specification batch being of a size of 125mm × 125mm, appoint 50 that get wherein, be all composed in series the photovoltaic module of prior art according to the arrangement mode of 5 row × 10 row=50 slice; With reference to Fig. 8, separately get and to be divided into two with batch solar battery sheet 100 or the incomplete portion of removing in prior art solar battery sheet 100 obtains the half-cell sheet 200 ading up to 100, these 100 half solar cells are arranged as 10 row=100 slice, row × 10 according to the mode of Fig. 8, and be middle string according to being first little string, then adjacent two little connection in series-parallel by the 10 half-cell series connection of every a line, be a string greatly again by series connection in adjacent two, thus form a half-cell sheet photovoltaic module.The photovoltaic module electrical property of photovoltaic module of the prior art and half-cell sheet composition is contrasted, its detected parameters sees the following form, and therefrom can find out, the open circuit voltage of the two and short circuit current basically identical, but, the maximum power ratio general components height about 4.8% of half solar cell photovoltaic assembly.
embodiment 3
With reference to Fig. 9, choose the multicrystalline solar cells of the prior art 100 of same batch that is of a size of 156mm × 156mm, appoint get wherein 60, be all composed in series the prior art solar cell photovoltaic assembly shown in Fig. 9 according to the arrangement mode of 6 row × 10 row=60 slice; With reference to Figure 10, separately will to be divided into two in the middle of the solar battery sheet of prior art or the incomplete portion of removing in prior art solar battery sheet 100 obtains the half-cell sheet 200 of 120 shown in Fig. 2, these 120 half-cell sheets 200 are arranged as 6 row=120 slice, row × 20 according to the mode of Figure 10, and be middle string according to being first little string, then adjacent two little connection in series-parallel by the 20 half-cell sheet series connection of each row, be a string greatly again by series connection in adjacent three, thus form a half-cell sheet photovoltaic module.
Optionally, 120 half-cells also can according to the mode of Figure 11,60 of left side half-cell sheets 200 are connected as left part battery strings, 60 of right-hand part half-cell sheets 200 are connected as right part battery strings, then that left part battery strings and right part battery strings is in parallel again thus form a half-cell photovoltaic module.
Optionally, 120 half-cells also can according to the mode of Figure 12, being upper cell string by the series connection of 60 of first half half-cells, is lower battery string by 60 of Lower Half half-cells series connection, then by upper cell string and lower battery string in parallel again thus form a half-cell photovoltaic module.The electrical property of prior art photovoltaic module and half-cell sheet photovoltaic module is contrasted, through detection its parameter see the following form, therefrom can find out, the open circuit voltage of the two and short circuit current basically identical, but, the maximum power ratio general components height about 5.2% of half-cell chip module.
Known by the above embodiments, use half-cell can utilize the half-cell sheet being of a size of cell piece size 125mm × 125mm or 156mm in prior art × 156mm half, can waste battery sheet be wanted to make full use of a part in prior art, turn waste into wealth, by some half-cell sheets are carried out regular connection in series-parallel combination by cathode and anode directions, finally be packaged together and form described half-cell photovoltaic module, the own power loss caused due to photovoltaic module internal resistance can be effectively reduced, thus improve the power stage of photovoltaic module, utilize the combination of this half-cell sheet compared with the combination of existing cell piece, when open circuit voltage and short circuit current substantially constant, maximum power can improve 3%-6%, achieve higher photoelectric conversion rate.
After detailed description embodiments of the present invention, be familiar with this technology personage can be well understood to, do not departing under above-mentioned claim and spirit and can carry out various change and amendment, all above embodiment is done according to technical spirit of the present invention any amendment, equivalent variations and modification, all belong to the scope of technical solution of the present invention, and the present invention is not also limited to the execution mode of example in specification.
Claims (3)
1. a manufacture method for half-cell sheet photovoltaic module, comprises the substrate arranging solar battery sheet, it is characterized in that: half-cell sheet photovoltaic module comprises following manufacturing step:
a.the size of solar battery sheet is processed into 125mm × 62.5mm or 156mm × 78mm respectively, and welding electrode, form half-cell sheet;
b.according to any one in following several connected mode, on substrate, double cell piece connects:
b1. be connected in series between the half-cell sheet in whole solar module, carry out tandem comprising the order by row/column;
b2. parallel connection between the half-cell sheet be connected in series by row/column by after row/column serial connection and other half between the half half-cell sheet in whole solar module, comprising two, the left and right half half-cell sheet of two half-sum longitudinally center line segmentations up and down of transversely center line segmentation, the quantity between described upper and lower two half or two, left and right half half-cell sheet is equal;
b3. go here and there in formation in parallel between adjacent two column/rows after the interior serial connection of each column/row in whole solar module, the middle string after parallel connection is connected again with other, is formed and goes here and there greatly;
c.in order to reach the connected mode in B1, B2 and B3, described half-cell sheet matrix arrangement mode can be divided into following several, can realize a connected mode in above-mentioned step B according to any one matrix arrangement mode wherein:
c1.the length and width direction of described half-cell sheet and the length and width direction of substrate are that consistent direction arranges;
c2.the length and width direction of described half-cell sheet and the length and width direction of substrate arrange in vertical direction;
c3.the odd number column/row of described half-cell sheet is contrary with the electrode direction of even column/line number;
c4.with the width center line of substrate for assembly is divided into left and right two parts by symmetry axis, the odd column of the half-cell sheet of every part is contrary with the electrode direction of even column;
c5.with the length center line of substrate for assembly is divided into upper and lower two parts by symmetry axis, the odd column of the half-cell sheet of every part is contrary with the electrode direction of even column;
c6.with the width center line of substrate for assembly is divided into symmetrical two parts by symmetry axis, the electrode direction of outermost adjacent two row of every part is identical, then contrary with tertial electrode direction if any the 3rd row.
2. the manufacture method of a kind of half-cell sheet photovoltaic module according to claim 1, it is characterized in that: described half-cell sheet number of permutations be in assembly X row × Y capable=N sheet, wherein X is matrix columns, Y is matrix line number and X, Y are positive integer, and meet 8≤X≤16,12≤Y≤24, X≤Y.
3. the manufacture method of a kind of half-cell sheet photovoltaic module according to claim 1, is characterized in that: described half-cell sheet comprises Monocrystalline silicon cell piece, polycrystalline silicon battery plate, silicon/crystalline silicon heterojunction electricity sheet pond, fourchette back contact battery sheet, emitter perforation winding battery sheet.
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