CN104428904A - Solar cell module and manufacturing method for same - Google Patents
Solar cell module and manufacturing method for same Download PDFInfo
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- CN104428904A CN104428904A CN201380036546.6A CN201380036546A CN104428904A CN 104428904 A CN104428904 A CN 104428904A CN 201380036546 A CN201380036546 A CN 201380036546A CN 104428904 A CN104428904 A CN 104428904A
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- electric conductor
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Classifications
-
- 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
- H01L31/02—Details
- H01L31/02002—Arrangements for conducting electric current to or from the device in operations
- H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
- H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
- H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
-
- 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
-
- 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
- H01L31/0512—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 made of a particular material or composition of materials
-
- 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
Abstract
A solar cell module comprising tab lines, a first adhesive, and solar cells having electrodes. The electrodes of the solar cells and the tab lines are connected by the first adhesive. The solar cell module is formed by the tab lines having two or more electrical conductors in a connection region where at least the electrodes of the solar cells and the tab lines connect, and by the electrical conductors being connected to each other by a second adhesive.
Description
Technical field
The present invention relates to solar module and manufacture method thereof.
Background technology
Solar cell will be due to will be clean and the sunlight that can unfailingly supply is directly changed into electric energy, so be expected to as the new energy.
Above-mentioned solar cell such as can be used as and connects the solar module of multiple solar battery cell via closing line and use.
Existing closing line is used in the type that copper line surface is coated with solder.And the electrode of solar battery cell is connected via solder with closing line.But because the connection of solder needs high temperature, so can cause the panel be full of cracks of sensitive surface or tilt, solder exposes from closing line the short circuit etc. that (sewing) cause, and becomes unfavorable reason.
Therefore, use the connecting material of the bonding agent such as conductive adhesive, insulating properties bonding agent instead solder always.Such as, motion has a kind of solar module (for example, referring to patent documentation 1) be connected with closing line by the surface electrode of solar battery cell via conductive adhesive.
But, in the technology of this motion, cause the cure shrinkage of conductive adhesive and stress to concentrate to conductive adhesive due to heating when being connected with closing line by the surface electrode of solar battery cell and extruding, thus there is the problem that closing line causes connection reliability to reduce from solar battery cell stripping etc.In recent years in order to turn to object with further high photoelectric efficiency, during by closing line graph thinning to increase light-receiving area, this problem becomes more remarkable.
Therefore, present situation seeks a kind of solar module and the manufacture method thereof that provide connection reliability excellence.
Prior art document
Patent documentation
Patent documentation 1: Japanese Patent Publication 2010-258006 publication
Summary of the invention
Invent problem to be solved
Problem of the present invention is, solves existing described problems, realizes following object.That is, the object of the invention is to, a kind of solar module and manufacture method thereof of connection reliability excellence is provided.
For solving the means of problem
As the means for solving described problem, as follows.That is:
< 1 > solar module, is characterized in that,
Possess solar battery cell, closing line and first bonding agent with electrode,
The electrode of described solar battery cell is connected via described first bonding agent with described closing line,
In the join domain be at least connected with described closing line at the electrode of described solar battery cell, described closing line has plural electric conductor, and described electric conductor connects via the second bonding agent each other.
The solar module of < 2 > according to above-mentioned < 1 >, wherein,
The average thickness of the closure of electric conductor is 9 μm ~ 200 μm.
The solar module of < 3 > according to any one of above-mentioned < 1 > ~ < 2 >, wherein,
The summation (A) of the average thickness (μm) of the closure of each electric conductor in closing line is 0.009 ~ 0.250 with the ratio (A/B) of the mean breadth (μm) (B) of closing line.
The solar module of < 4 > according to any one of above-mentioned < 1 > ~ < 3 >, wherein,
Electric conductor contains any one in copper and aluminium.
The solar module of < 5 > according to any one of above-mentioned < 1 > ~ < 4 >, wherein,
The quantity of the electric conductor in closing line is 2 ~ 5.
The solar module of < 6 > according to any one of above-mentioned < 1 > ~ < 5 >, wherein,
This solar module is any one in crystal class solar module and film class solar module.
The solar module of < 7 > according to any one of above-mentioned < 1 > ~ < 6 >, wherein,
In first bonding agent and the second bonding agent at least any one is any one in conductive adhesive and insulating properties bonding agent.
The manufacture method of a < 8 > solar module, is characterized in that, at least comprise:
Arrangement step, the electrode of solar battery cell at least configures the first bonding agent, the first electric conductor, the second bonding agent and the second electric conductor in order;
Coating operation, utilizes sealing resin to cover described solar battery cell, and further described sealing resin is utilized any one covering in moisture resistance tergite and glass plate;
Extrusion process, extrudes any one in described moisture resistance tergite and glass plate;
Heating process, heats the heating station being placed with described solar battery cell.
Invention effect
According to the present invention, existing described problems can be solved, realize described object, and solar module and the manufacture method thereof of connection reliability excellence can be provided.
Accompanying drawing explanation
Fig. 1 is the approximate vertical view of the example representing film class solar module;
Fig. 2 is the exploded perspective view of the example representing crystal class solar module;
Fig. 3 is the summary section of the example representing crystal class solar module;
Fig. 4 is the summary section of an example for closing line of the present invention;
Fig. 5 is the approximate vertical view of crystal class solar battery cell model;
Fig. 6 is the cross sectional photograph of the film class solar battery cell model (embodiment 2) being configured with closing line.
Embodiment
(solar module)
Solar module of the present invention at least has solar battery cell, closing line and the first bonding agent, has other parts such as sealing resin, moisture resistance tergite, glass plate as required further.
In above-mentioned solar module, via above-mentioned first bonding agent, the electrode of above-mentioned solar battery cell is connected with above-mentioned closing line.
< solar battery cell >
As long as above-mentioned solar battery cell has electrode, just be not particularly limited, can select according to object is suitable, such as, at least there is photo-electric conversion element, finger electrode, the bus-bar electrode as photoelectric conversion department, need the parts with other further as required.
As above-mentioned solar battery cell, such as, can enumerate film class solar battery cell, crystal class solar battery cell etc.As above-mentioned film class solar battery cell, such as, can enumerate uncrystalline silicon solar battery cell, compounds solar battery cell (CIS solar battery cell, CdS/CdTe solar battery cell), dye-sensitized solar cell unit, You Ji Bao Mo solar battery cell, microcrystalline silicon solar cell unit (series type solar battery cell) etc.As above-mentioned crystal class solar battery cell, such as, can enumerate monocrystaline silicon solar cell unit, polycrystal silicon solar battery cell etc.
Above-mentioned solar battery cell also can be do not have constructing without bus-bar of bus-bar electrode.
As the average thickness of above-mentioned solar battery cell, be not particularly limited, can select according to object is suitable.
-finger electrode-
Above-mentioned finger electrode is the electrode being collected in the electric energy generated in above-mentioned photoelectric conversion department.Above-mentioned finger electrode is formed along the direction roughly orthogonal with above-mentioned closing line on above-mentioned solar battery cell.
As the material of above-mentioned finger electrode, be not particularly limited, can select according to object is suitable, such as, can enumerate silver, gold, copper, tin, nickel etc.
As the mean breadth of above-mentioned finger electrode, be not particularly limited, can select according to object is suitable, but be preferably 20 μm ~ 200 μm, be more preferably 20 μm ~ 100 μm.
The value of mensuration such as by the width of any 10 the above-mentioned finger electrodes of mensuration at above-mentioned finger electrode, and can be averaged and tries to achieve by above-mentioned mean breadth.
As the formation method of above-mentioned finger electrode, be not particularly limited, can select according to object is suitable, such as, can by the mode becoming desired pattern form with above-mentioned finger electrode, silver paste is printed on above-mentioned photo-electric conversion element and be formed.As above-mentioned printing process, such as, silk screen printing etc. can be enumerated.
-bus-bar electrode-
Above-mentioned bus-bar electrode further collects the electric energy collected by above-mentioned finger electrode, and by electrode that electric energy transmits to above-mentioned closing line.
In addition, in the solar battery cell constructed without bus-bar, electric energy from above-mentioned finger electrode directly to above-mentioned closing line transmission.
As the material of above-mentioned bus-bar electrode, be not particularly limited, can select according to object is suitable.Such as can enumerate silver, gold, copper, tin, nickel etc.
As the mean breadth of above-mentioned bus-bar electrode, be not particularly limited, can select according to object is suitable, be preferably 500 μm ~ 5,000 μm, be more preferably 800 μm ~ 2,000 μm.
Measured value such as by the width of any 10 the mensuration bus-bar electrodes at above-mentioned bus-bar electrode, and can be averaged and tries to achieve by above-mentioned mean breadth.
As the formation method of above-mentioned bus-bar electrode, be not particularly limited, can select according to object is suitable, such as, can print silver paste by the mode becoming desired pattern form with above-mentioned bus-bar electrode on above-mentioned photo-electric conversion element and be formed.As above-mentioned printing process, such as, silk screen printing etc. can be enumerated.
Above-mentioned bus-bar electrode and above-mentioned finger electrode also can be formed simultaneously.Such as, use the galley that can form the pattern form of desired bus-bar electrode and desired finger electrode, stuck with paste by the silver of silk screen printing on photo-electric conversion element, above-mentioned bus-bar electrode and above-mentioned finger electrode can be formed simultaneously.
< first bonding agent >
As above-mentioned first bonding agent, be not particularly limited, can select according to object is suitable.Such as can enumerate conductive adhesive, insulating properties bonding agent etc.
-conductive adhesive-
As above-mentioned conductive adhesive, be not particularly limited, can select according to object is suitable.Such as can enumerate at least containing electroconductive particle, be preferably and form resin, curable resin, curing agent containing film, the conductive adhesive etc. further as required containing other composition.
--electroconductive particle--
As above-mentioned electroconductive particle, be not particularly limited, can select according to object is suitable, such as, can enumerate nickel particles, the coating nickel particles of gold, be coated to the resin particle etc. of most surface further by gold by the resin particle of nickel coated with resin core, by nickel coated with resin core.
--film forms resin--
Resin is formed as above-mentioned film, be not particularly limited, can select according to object is suitable, such as, can enumerate phenoxy resin, unsaturated polyester resin, saturated polyester resin, amido formate resin, butadiene resin, polyimide resin, polyamide, vistanex etc.They can be used alone one, also can be used together more than two kinds.Wherein, particularly preferably phenoxy resin.
--curable resin--
As above-mentioned curable resin, be not particularly limited, can select according to object is suitable, such as, can enumerate epoxy resin, acrylate etc.
Above-mentioned curable resin can solidify separately in above-mentioned solar module, also can be solidified by curing agent described later.
---epoxy resin---
As above-mentioned epoxy resin, be not particularly limited, can select according to object is suitable, such as, can enumerate bisphenol A type epoxy resin, bisphenol f type epoxy resin, phenolic resin varnish type epoxy resin, their modified epoxy, alicyclic epoxy resin etc.They can be used alone one, also can be used together more than two kinds.
---acrylate---
As aforesaid propylene acid ester resin, be not particularly limited, can select according to object is suitable, such as methyl acrylate can be enumerated, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, acrylic acid epoxy ester, glycol diacrylate, diethylene glycol diacrylate, trimethylolpropane triacrylate, dihydroxymethyl tristane diacrylate, tetramethylene glycol tetraacrylate, 2-hydroxyl-1, 3-bis-acryloxy propane, 2, two [4-(acryloyl-oxy ylmethoxy) phenyl] propane of 2-, 2, two [4-(acryloyloxyethoxy) phenyl] propane of 2-, acrylic acid dicyclopentenyl ester, acrylic acid tricyclodecenyl esters, three (acryloyl-oxyethyl) isocyanuric acid ester, ammonia ester acrylate etc.They can be used alone one, also can be used together more than two kinds.
In addition, can enumerate resin aforesaid propylene acid esters being become methacrylate, they can be used alone one, also can be used together more than two kinds.
--curing agent--
Above-mentioned curable resin is preferably used with curing agent.As above-mentioned curing agent, be not particularly limited, can select according to object is suitable, the imidazoles that such as can to enumerate with 2-ethyl 4-methylimidazole be representative; The organic peroxides such as lauroyl peroxide, butylperoxide, Benzyl base peroxide, dilauroyl peroxide, dibutyl peroxide, peroxydicarbonate, benzoyl peroxide; The anionic species curing agent such as organic amine; Sulfonium salt,
the cationic such as salt, aluminum chelating agent curing agent etc.
Among them, be particularly preferably the combination of the combination of epoxy resin and imidazoles, acrylate and organic peroxide.
--other composition--
As other composition above-mentioned, be not particularly limited, can select according to object is suitable, such as, can enumerate silane coupler, filler, softening agent, promoter, age resister, colouring agent (pigment, dyestuff), organic solvent, ion capturing agent etc.The addition of other composition above-mentioned is not particularly limited, and can select according to object is suitable.
-insulating properties bonding agent-
As above-mentioned insulating properties bonding agent, be not particularly limited, can select according to object is suitable, such as, can enumerate and form resin, curable resin, curing agent containing film, the insulating properties bonding agent etc. further as required containing other composition.
Resin, curable resin, curing agent and other composition is formed as the film in above-mentioned insulating properties bonding agent, be not particularly limited, can select according to object is suitable, such as, can enumerate above-mentioned film illustrated in the explanation of above-mentioned conductive adhesive respectively and form resin, above-mentioned curable resin, above-mentioned curing agent and other composition.
Above-mentioned first bonding agent, can with aqueous use when making above-mentioned solar module, also can with membranaceous use.
< closing line >
In the join domain that above-mentioned closing line is at least connected with above-mentioned closing line at the electrode of above-mentioned solar battery cell, there is plural electric conductor.Above-mentioned electric conductor connects via the second bonding agent each other.
-electric conductor-
As the material of above-mentioned electric conductor, be not particularly limited, can select according to object is suitable, such as, can enumerate copper, aluminium, iron, gold, silver, nickel, palladium, chromium, molybdenum and their alloy etc.
Above-mentioned electric conductor is preferably containing any one in copper and aluminium.
As the shape of above-mentioned electric conductor, do not hinder system especially, can select according to object is suitable, such as, can enumerate tabular etc.
As the structure of above-mentioned electric conductor, be not particularly limited, can select according to object is suitable, can be monolayer constructions will, also can be lit-par-lit structure.As above-mentioned monolayer constructions will, such as can enumerate with copper, aluminium etc. is the monolayer constructions will of its material.As above-mentioned lit-par-lit structure, such as, can enumerate the lit-par-lit structure etc. had with the base material that is material such as copper, aluminium and plating layer.As the material of above-mentioned plating layer, such as, can enumerate gold, silver, tin, solder etc.
As the average thickness of the closure of above-mentioned electric conductor, be not particularly limited, can select according to object is suitable, but be preferably 9 μm ~ 200 μm, be more preferably 9 μm ~ 150 μm.When above-mentioned average thickness is lower than 9 μm, then the situation that the extraction efficiency having the electric energy generated by solar battery cell reduces, if more than 200 μm, then has the situation that connection reliability reduces.If above-mentioned average thickness is in above-mentioned preferred scope, be then favourable in the more excellent this point of connection reliability.
Above-mentioned average thickness, such as, by the thickness of the closure of any 10 the above-mentioned electric conductors of mensuration at above-mentioned electric conductor, and can be averaged measured value and try to achieve.
Above-mentioned closure also can be the direction with solar battery cell surface normal.
As the quantity of the electric conductor in above-mentioned closing line, be not particularly limited, can select according to object is suitable, but be preferably 2 ~ 5, be more preferably 2 ~ 3.If above-mentioned quantity is more than 5, then can there is the position deviation of above-mentioned closing line in the extrusion process when manufacturing above-mentioned solar module, having thus and the reduction of connection reliability and the situation of bad connection occur.If above-mentioned quantity is in above-mentioned preferred scope, be then favourable in the more excellent this point of connection reliability.
The material of each electric conductor of the above-mentioned plural electric conductor in above-mentioned closing line can be identical, also can be different.
The average thickness of each closure of the above-mentioned plural electric conductor in above-mentioned closing line can be identical, also can be different.
Construct as above-mentioned closing line, such as, can enumerate the structure of following arrangement.
(1) electric conductor/the second bonding agent/electric conductor
(2) electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor
(3) electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor
(4) electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor
(5) electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor/the second bonding agent/electric conductor
When above-mentioned first bonding agent and above-mentioned second bonding agent use insulating properties bonding agent, for making to become easy with the electrical connection of the electrical connection of the electrode of above-mentioned solar battery cell and mutual electric conductor, above-mentioned electric conductor preferably has projection on its surface.As above-mentioned projection material, shape, size, structure, be not particularly limited, can select according to object is suitable.In addition, the thickness of the closure of the above-mentioned electric conductor of above-mentioned electric conductor in the bossed situation of its surperficial tool is the thickness of the part except projection.
-the second bonding agent-
As above-mentioned second bonding agent, be not particularly limited, can select according to object is suitable, such as, can enumerate the bonding agent etc. identical with above-mentioned first bonding agent.The composition of above-mentioned first bonding agent can be identical with the composition of above-mentioned second bonding agent, also can be different.
In above-mentioned closing line, when the quantity of above-mentioned electric conductor is more than three, above-mentioned second bonding agent can be used for more than two places, but the composition of above-mentioned second bonding agent now more than two places can be identical, also can be different.
As the mean breadth of above-mentioned closing line, be not particularly limited, can select according to object is suitable, but be preferably 500 μm ~ 10,000 μm, be more preferably 800 μm ~ 4,000 μm.
Above-mentioned mean breadth, such as, by the width of the above-mentioned electric conductor of any 10 the above-mentioned closing lines of mensuration at above-mentioned closing line, and can be averaged measured value and try to achieve.The width of above-mentioned electric conductor refers to the closure of above-mentioned electric conductor to be the distance in vertical direction.
As the ratio (A/B) of the summation (A) of the average thickness (μm) of the closure of each electric conductor in above-mentioned closing line with the mean breadth (μm) (B) of above-mentioned closing line, be not particularly limited, can select according to object is suitable, but be preferably 0.009 ~ 0.250, be more preferably 0.009 ~ 0.150.If above-mentioned than (A/B) lower than 0.009, then have solar battery cell generate electric energy extraction efficiency reduce situation; If more than 0.250, then can connection reliability reduce situation.If above-mentioned than (A/B) in above-mentioned preferred scope, be then favourable in the more excellent this point of connection reliability.
< sealing resin >
As above-mentioned sealing resin, be not particularly limited, can select according to object is suitable, such as can enumerate ethylene/vinyl acetate copolymer (EVA), second rare/vinyl acetate/triallyl cyanurate (EVAT), polyvinylbutyrate (PVB), polyisobutene (PIB), organic siliconresin, polyurethane resin etc.
< moisture resistance tergite >
As above-mentioned moisture resistance tergite, be not particularly limited, can select according to object is suitable, such as, can enumerate the duplexer etc. of polyethylene terephthalate (PET), aluminium (Al), PET and Al and polyethylene (PE).
< glass plate >
As above-mentioned glass plate, be not particularly limited, can select according to object is suitable, such as, can enumerate soda lime float glass plate etc.
Above-mentioned solar module can be the film class solar module using above-mentioned film class solar battery cell, also can be the crystal class solar module using above-mentioned crystal class solar battery cell.
Use accompanying drawing that an example of solar module of the present invention is described.
Fig. 1 is the approximate vertical view of the example representing film class solar module 200.The film class solar module 200 of Fig. 1, on base material 38, is in series arranged with the film class solar battery cell 32 be made up of film class photo-electric conversion element along in-plane.And, on the surface electrode (not shown) of the surface electrode (not shown) of the film class solar battery cell 32c of side end and the film class solar battery cell 32d of opposite side end, be connected with via conductivity adhesive linkage (not shown) closing line 3 that electric power exports.
Fig. 2 is the exploded perspective view of the example representing crystal class solar module.Crystal class solar module 1 has the line string 4 utilizing the closing line 3 becoming internal connector to be connected in series multiple crystal class solar battery cell 2, and also possesses the matrix 5 being arranged with multiple line string 4.And, the matrix 5 of crystal class solar module 1 is clamped with the sheet material 6 of sealing resin, and by stacked in the lump for the tergite 8 of the face cap 7 being located at sensitive surface side and the moisture resistance of being located at rear side.Finally, around the metal frameworks 9 such as aluminium are installed, form crystal class solar module 1 thus.
In addition, as shown in Figure 3, each crystal class solar battery cell 2X, 2Y, 2Z of crystal class solar module have the crystal class photo-electric conversion element 10 be made up of silicon substrate.On crystal class photo-electric conversion element 10, be provided with the bus-bar electrode 11 becoming surface electrode, the collector electrode agent finger electrode 12 be formed on the direction substantially vertical with bus-bar electrode 11 in sensitive surface side.In addition, on crystal class photo-electric conversion element 10, the rear side contrary with sensitive surface is provided with the aluminium backplate 13 be made up of aluminium.
And, be electrically connected by the aluminium backplate 13 of closing line 3 by the bus-bar electrode 11 on the surface of solar battery cell 2 and adjacent solar battery cell 2, form the line string 4 be connected in series thus.The connection of closing line 3 and bus-bar electrode 11 and the connection of closing line 3 and aluminium backplate 13 are such as undertaken by conductivity adhesive film 17.
Fig. 4 is the summary section of the example representing closing line.Closing line 3 is the duplexer the first electric conductor 3a, the second bonding agent 3b and the second electric conductor 3c are laminated in this order.Second bonding agent 3b such as uses conductivity adhesive film to be formed.
(manufacture method of solar module)
The manufacture method of solar module of the present invention at least comprises arrangement step, coating operation, extrusion process and heating process, comprises other operation as required further.
The manufacture method of solar module of the present invention is applicable to and manufactures solar module of the present invention.
< arrangement step >
As above-mentioned arrangement step, as long as at least configure the operation of the first bonding agent, the first electric conductor, the second bonding agent and the second electric conductor on the electrode of solar battery cell in order, be just not particularly limited, can select according to object is suitable.
In addition, above-mentioned first electric conductor, above-mentioned second bonding agent, above-mentioned second electric conductor form closing line in solar module of the present invention.
As above-mentioned solar battery cell, such as, can enumerate above-mentioned solar battery cell etc. illustrated in the explanation of solar module of the present invention.
As above-mentioned first bonding agent and above-mentioned second bonding agent, such as, can enumerate above-mentioned first bonding agent illustrated in the explanation of solar module of the present invention and above-mentioned second bonding agent respectively.
As the average thickness in the closure of above-mentioned first bonding agent and above-mentioned second bonding agent, be not particularly limited, can be suitable for as required selecting, but be preferably 3 μm ~ 100 μm, be more preferably 5 μm ~ 50 μm, be particularly preferably 10 μm ~ 35 μm.
Above-mentioned average thickness, such as, by the thickness of any 10 the mensuration closures at above-mentioned first bonding agent and above-mentioned second bonding agent, and can be averaged measured value and try to achieve.
As above-mentioned first electric conductor and above-mentioned second electric conductor, such as, can enumerate above-mentioned electric conductor etc. illustrated in the explanation of solar module of the present invention.
An example of above-mentioned arrangement step is described.
The bus-bar electrode of above-mentioned solar battery cell is arranged and is cut into the membranaceous conductive adhesive (conductivity adhesive film, the first bonding agent) with above-mentioned bus-bar electrode same widths.Then, above-mentioned first bonding agent arranges the Copper Foil (the first electric conductor) with above-mentioned bus-bar electrode same widths.Then, on above-mentioned first electric conductor, setting is cut into the membranaceous conductive adhesive (conductivity adhesive film, the second bonding agent) with above-mentioned bus-bar electrode same widths.Then, above-mentioned second bonding agent arranges the Copper Foil (the second electric conductor) with above-mentioned bus-bar electrode same widths.As above operation can be configured.
Other example of above-mentioned arrangement step is described.
First, the two-layer body being placed with membranaceous conductive adhesive (bonding agent) on Copper Foil (electric conductor) is prepared.The width of above-mentioned two-layer body is preset as the width identical with the bus-bar electrode of above-mentioned solar battery cell.
Then, on the bus-bar electrode of above-mentioned solar battery cell, the mode connected with above-mentioned bonding agent (the first bonding agent) and above-mentioned bus-bar electrode is to arrange above-mentioned two-layer body (the first two-layer body).Further another two-layer body (the second two-layer body) is set on set above-mentioned two-layer body (the first two-layer body), connects with the bonding agent (the second bonding agent) of the electric conductor (the first electric conductor) and above-mentioned second two-layer body that make above-mentioned first two-layer body.As above operation can be configured.
Other example of above-mentioned arrangement step is described.
First, the two-layer body weight preparing to be placed with on Copper Foil (electric conductor) membranaceous conductive adhesive (bonding agent) closes four layers of body of two.The width of above-mentioned four layers of body is preset as the width identical with the bus-bar electrode of above-mentioned solar battery cell.
Then, on the bus-bar electrode of above-mentioned solar battery cell, the mode connected with above-mentioned bonding agent (the first bonding agent) and above-mentioned bus-bar electrode arranges above-mentioned four layers of body.As above operation can be configured.
After above-mentioned arrangement step, the electrode of above-mentioned first electric conductor, above-mentioned second electric conductor and above-mentioned solar battery cell can be electrically connected, also can not be electrically connected.
< is coated to operation >
As above-mentioned coating operation, as long as cover above-mentioned solar battery cell by sealing resin, and the operation of above-mentioned sealing resin is covered further by any one in moisture resistance tergite and glass plate, be just not particularly limited, can select according to object is suitable.
The manufacture method of above-mentioned solar module as above preferably uses decompression laminating machine to carry out.The method of above-mentioned decompression laminating machine is used such as to carry out with reference to described method in Japanese Patent Publication 2010-283059 publication.
As above-mentioned sealing resin, above-mentioned moisture resistance tergite and above-mentioned glass plate, be not particularly limited, can select according to object is suitable, such as, can enumerate above-mentioned sealing resin, above-mentioned moisture resistance tergite and above-mentioned glass plate illustrated in the explanation of above-mentioned solar module of the present invention respectively.
< extrusion process and heating process >
As above-mentioned extrusion process, as long as extrude the operation of any one of above-mentioned moisture resistance tergite and glass plate, be just not particularly limited, can select according to object is suitable.The pressure of extruding and the time of extruding are arbitrary.
As above-mentioned heating process, as long as the operation heated the heating station being placed with above-mentioned solar battery cell, be just not particularly limited, can select according to object is suitable.By heating above-mentioned heating station, above-mentioned sealing resin can be heated.In addition, above-mentioned first bonding agent and above-mentioned second bonding agent can be heated.
As the heating-up temperature in above-mentioned heating process, be not particularly limited, can select according to object is suitable, but be preferably 50 DEG C ~ 250 DEG C, be more preferably 100 DEG C ~ 200 DEG C.When above-mentioned heating-up temperature is lower than 50 DEG C, just have the situation that sealing is insufficient, if more than 250 DEG C, then have the situation of organic resin thermal decomposition contained in bonding agent, sealing resin etc.If above-mentioned heating-up temperature is in above-mentioned preferred scope, be then favourable in the reliability this point of sealing.
As the heating time in above-mentioned heating process, be not particularly limited, can select according to object is suitable, but be preferably 1 second ~ 1 hour, be more preferably 5 seconds ~ 30 minutes, be particularly preferably 10 seconds ~ 20 minutes.When above-mentioned heating time was lower than 1 second, then have the situation that sealing is insufficient.If above-mentioned heating time is in above-mentioned particularly preferred scope, be then favourable in the reliability this point of sealing.
As the order starting above-mentioned extrusion process and above-mentioned heating process, be not particularly limited, can select according to object is suitable.
In above-mentioned arrangement step, when the electrode of above-mentioned first electric conductor, above-mentioned second electric conductor and above-mentioned solar battery cell is not electrically connected, also by above-mentioned extrusion process and above-mentioned heating process, the electrode of above-mentioned first electric conductor, above-mentioned second electric conductor and above-mentioned solar battery cell can be electrically connected.
As above solar module of the present invention is manufactured.
In addition, such as, formed and the line string directly connecting multiple solar battery cell is arranged multiple matrixes further, this matrix is sealed, also can make solar module of the present invention thus.
Embodiment
Below embodiments of the invention are described.But the present invention is not by any restriction of these embodiments.
(embodiment 1)
The making > of < solar module model
-electric conductor-
As electric conductor, use and cut into the Copper Foil (average thickness is 9 μm) that mean breadth is 2,000 μm.
-conductivity adhesive film-
Prepare conductivity adhesive film (SP100 series, average thickness are 25 μm, Sony Chemical & massaging device Co., Ltd. system), and be cut to mean breadth 2,000 μm uses.
-making of film class solar module model-
Prepare the glass substrate (long 100mm × wide 100mm × thickness 0.7mm) being formed with silver electrode on whole.It can be used as film class solar battery cell model.
The electrode of film class solar battery cell model configures conductivity adhesive film (the first bonding agent), electric conductor (the first electric conductor), conductivity adhesive film (the second bonding agent) and electric conductor (the second electric conductor) in order, temporarily fits afterwards.The condition of temporary transient laminating is: heating-up temperature is 70 DEG C, pressure is 0.5NPa, 1 second, and uses heating tool to carry out.
As above, the film class solar battery cell model of the band closing line of stacked first bonding agent and closing line on the electrode of film class solar battery cell model is obtained.In addition, the duplexer of above-mentioned closing line be stacked first electric conductor, the second bonding agent and the second electric conductor.The interval that this duplexer separates 8.0cm on the electrode of film class solar battery cell model configures two.
Then, utilize sealing resin to cover the film class solar battery cell model of the band closing line obtained, and cover above-mentioned sealing resin with moisture resistance tergite further.Above-mentioned sealing resin system use thickness is the ethylene/vinyl acetate copolymer of 500 μm.Tergite uses PET film.
Then, laminating machine is utilized to seal above-mentioned sealing resin.Specifically, carry out the vacuum attraction of 5 minutes at 100 DEG C after, carry out lamination with 5 minutes pressing times, 0.1MPa, be then cured with 155 DEG C, 45 minutes in baker
As above film class solar module model is obtained.
< evaluates >
Following evaluation is carried out for film class solar module obtained above.Show the result in table 1.
-connection reliability-
Resistance value between two closing lines of the film class solar module model that mensuration obtains.
Resistance value after using digital multimeter (Yokogawa Electricity Co., Ltd.'s system, digital multimeter 7555) to measure initial stage, TC200 and after TC400, and evaluate with following metewand.
In addition, above-mentioned TC200 represent with from-40 DEG C be warming up to 85 DEG C (programming rate is 2 DEG C/min), keep for 85 times 35 minutes, to be cooled to-40 DEG C (cooling rate is 2 DEG C/min) and-40 DEG C from 85 DEG C keep 35 minutes for once to circulate, and the test that circulates for 200 times is carried out to it.Above-mentioned TC400 represents the test carrying out above-mentioned circulation 400 circulations.
(metewand)
◎: lower than 10m Ω
More than zero: 10m Ω and lower than 20m Ω
More than △: 20m Ω and lower than 100m Ω
×: more than 100m Ω
(embodiment 2 ~ 8)
The mean breadth of the material of the electric conductor in embodiment 1, the average thickness of electric conductor and closing line is changed to respectively the mean breadth of the material of the electric conductor described in table 1, the average thickness of electric conductor and closing line, in addition, make film class solar module model similarly to Example 1, and evaluate.Show the result in table 1.
In addition, in embodiment 7, the mean breadth of conductivity adhesive film is set to 800 μm.In embodiment 8, the mean breadth of conductivity adhesive film is set to 1,500 μm.
At this, Fig. 6 represents the cross sectional photograph of the film class solar battery cell model (embodiment 2) being configured with closing line.The closing line connecting the first electric conductor 3a and the second electric conductor 3c via the second bonding agent 3b is configured on film class solar battery cell model 32a via conductivity adhesive film 17.
(embodiment 9)
In embodiment 1, when temporarily fitting, second electric conductor configures conductivity adhesive film (the 3rd bonding agent) and electric conductor (the 3rd electric conductor) further in order, in addition, produce film class solar module model similarly to Example 1, and evaluate.Show the result in table 1.
(embodiment 10)
As crystal class solar battery cell model, make that to be formed with the mean breadth shown in Fig. 5 be the finger electrode 12 of 100 μm and mean breadth and be the glass substrate of the bus-bar electrode 11 of 2,000 μm.Specifically, by sticking with paste at the upper silk screen printing silver of glass substrate (long 125mm × wide 125mm × thickness 0.7mm) and burn till, form the pattern of the finger electrode 12 shown in Fig. 5 and bus-bar electrode 11, obtain crystal class solar battery cell model 2 '.
On the bus-bar electrode of the crystal class solar battery cell model obtained, configure the conductivity adhesive film (the first bonding agent) shown in embodiment 1, the electric conductor (the first electric conductor) shown in embodiment 1, the conductivity adhesive film (the second bonding agent) shown in embodiment 1, the electric conductor (the second electric conductor) shown in embodiment 1 in order, temporarily fit afterwards.The condition of temporary transient laminating is set to that heating-up temperature is 70 DEG C, pressure 0.5NPa, 1 second, use heating tool to carry out.
As above the crystal class solar battery cell model of the band closing line of stacked first bonding agent and closing line on the bus-bar electrode of crystal class solar battery cell model is obtained.In addition, above-mentioned closing line be the first electric conductor, the duplexer that is laminated of the second bonding agent and the second electric conductor.
In embodiment 1, except the crystal class solar battery cell model using band closing line obtained above, make crystal class solar module model similarly to Example 1, and evaluate.Show the result in table 1.
(embodiment 11 ~ 13)
The average thickness of the first electric conductor in embodiment 1, the average thickness of the second electric conductor and the mean breadth of closing line are changed into the average thickness of the first electric conductor described in table 2, the average thickness of the second electric conductor and the mean breadth of closing line, in addition, make film class solar module model similarly to Example 1, and evaluate.Show the result in table 2.
(embodiment 14)
The average thickness of the conductivity adhesive film in embodiment 4 is changed into 10 μm, in addition, makes film class solar module model similarly to Example 4, and evaluate.Show the result in table 2.
(embodiment 15)
The average thickness of the conductivity adhesive film in embodiment 4 is changed into 35 μm, in addition, makes film class solar module model similarly to Example 4, and evaluate.Show the result in table 2.
(comparative example 1)
-band solder closing line making-
It is the mean breadth that the Copper Foil of 400 μm cuts into 2mm (2,000 μm) by average thickness.
On the Copper Foil through cutting, (lead-free solder of 96.5 quality %/silver (3 quality %)/copper (0.5 quality %) obtains the closing line being with solder to plating tin.
-band closing line film class solar battery cell model making-
On the electrode of the film class solar battery cell model prepared in embodiment 1, the mode connected with the solder of the closing line of above-mentioned electrode and above-mentioned band solder, configures the closing line of the band solder of above-mentioned gained.The closing line of above-mentioned band solder configures two, and its interval is set as identical with embodiment 1.
Then, use soldering iron, heat with heating-up temperature 240 DEG C, obtain the film class solar battery cell model being with closing line.
-making of film class solar module model-
Then, utilize sealing resin to cover the film class solar battery cell model of the band closing line of gained, and utilize moisture resistance tergite to cover above-mentioned sealing resin further.Above-mentioned sealing resin use thickness is the ethylene/vinyl acetate copolymer of 500 μm.Tergite uses PET film.
Then, laminating machine is utilized to seal above-mentioned sealing resin.Specifically, carry out the vacuum attraction of 5 minutes at 100 DEG C after, carry out lamination with 5 minutes pressing times, 0.1MPa, then solidify 45 minutes with 155 DEG C in baker.
As above film class solar module model is obtained.
For the film class solar module model obtained, evaluate similarly to Example 1.Show the result in table 2.
(comparative example 2)
The average thickness of the first electric conductor in embodiment 1 is changed into 400 μm, and does not use the second bonding agent and the second electric conductor, in addition, make film class solar module model similarly to Example 1, and evaluate.Show the result in table 2.
(comparative example 3)
The average thickness of the Copper Foil in comparative example 1 is changed into 200 μm, in addition, makes film class solar battery cell module in the same manner as comparative example 1, and evaluate.Show the result in table 2.
(comparative example 4)
The average thickness of the first electric conductor in comparative example 2 is changed into 200 μm, in addition, makes film class solar battery cell module in the same manner as comparative example 2, and evaluate.Show the result in table 2.
[table 1]
[table 2]
The solar module made in embodiment 1 ~ 15, can confirm that connection reliability is excellent.
From the viewpoint that the conducting resistance after TC400 is also very excellent, can confirm that the average thickness of electric conductor is 9 μm ~ 150 μm, very preferably (such as with reference to embodiment 1 ~ 4 and embodiment 11).From the viewpoint that the conducting resistance after TC400 is also very excellent, can confirm that the summation of the average thickness of the electric conductor in closing line is 18 μm ~ 300 μm, very preferably (such as with reference to embodiment 1 ~ 4 and embodiment 11).
From the viewpoint that the conducting resistance after TC400 is also very excellent, can confirm that the summation (A) of the average thickness (μm) of each electric conductor in closing line is 0.009 ~ 0.150 with the ratio (A/B) of the mean breadth (μm) (B) of closing line, very preferably (such as with reference to embodiment 1 ~ 4,8 ~ 9,11).
As the material of electric conductor, can confirm it is no matter any one in copper and aluminium, connection reliability all excellent (such as with reference to embodiment 4 and 6).
As the kind of solar module, can confirm it is no matter any one in film class solar module and crystal class solar module, connection reliability all excellent (such as with reference to embodiment 4 and 10).
On the other hand, in comparative example 1 and 2, under TC200 and TC400, conducting resistance becomes very large and connection reliability is not enough.In addition, in comparative example 3 and 4, under TC400, electric conduction resistive is large, and connection reliability is not enough.
Utilizability in industry
Solar module of the present invention, because connection reliability is excellent, so can be specially adapted to as making the light-receiving area turning to object with high photoelectric efficiency increase and by the solar module of closing line graph thinning.
Symbol description
1 crystal class solar module
2 crystal class solar battery cells
3 closing lines
3a first electric conductor
3b second bonding agent
3c second electric conductor
4 line strings
5 matrixes
6 sheet materials
7 face cap
8 tergites
9 metal frameworks
10 crystal class photo-electric conversion elements
11 bus-bar electrodes
12 finger electrodes
13 aluminium backplates
17 conductivity adhesive films
32 film class solar battery cells
32a film class solar battery cell model
38 base materials
200 film class solar modules
Claims (8)
1. a solar module, is characterized in that,
Possess solar battery cell, closing line and first bonding agent with electrode,
The electrode of described solar battery cell is connected via described first bonding agent with described closing line,
In the join domain be at least connected with described closing line at the electrode of described solar battery cell, described closing line has plural electric conductor, and described electric conductor connects via the second bonding agent each other.
2. solar module according to claim 1, wherein,
The average thickness of the closure of electric conductor is 9 μm ~ 200 μm.
3. the solar module according to any one of claim 1 ~ 2, wherein,
The summation (A) of the average thickness (μm) of the closure of each electric conductor in closing line is 0.009 ~ 0.250 with the ratio (A/B) of the mean breadth (μm) (B) of closing line.
4. the solar module according to any one of claims 1 to 3, wherein,
Electric conductor contains any one in copper and aluminium.
5. the solar module according to any one of Claims 1 to 4, wherein,
The quantity of the electric conductor in closing line is 2 ~ 5.
6. the solar module according to any one of Claims 1 to 5, wherein,
This solar module is any one in crystal class solar module and film class solar module.
7. the solar module according to any one of claim 1 ~ 6, wherein,
In first bonding agent and the second bonding agent at least any one is any one in conductive adhesive and insulating properties bonding agent.
8. a manufacture method for solar module, is characterized in that, at least comprises:
Arrangement step, the electrode of solar battery cell at least configures the first bonding agent, the first electric conductor, the second bonding agent and the second electric conductor in order;
Coating operation, utilizes sealing resin to cover described solar battery cell, and further described sealing resin is utilized any one covering in moisture resistance tergite and glass plate;
Extrusion process, extrudes any one in described moisture resistance tergite and glass plate;
Heating process, heats the heating station being placed with described solar battery cell.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-154583 | 2012-07-10 | ||
| JP2012154583A JP5889738B2 (en) | 2012-07-10 | 2012-07-10 | Solar cell module and manufacturing method thereof |
| PCT/JP2013/068258 WO2014010486A1 (en) | 2012-07-10 | 2013-07-03 | Solar cell module and manufacturing method for same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104428904A true CN104428904A (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380036546.6A Pending CN104428904A (en) | 2012-07-10 | 2013-07-03 | Solar cell module and manufacturing method for same |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5889738B2 (en) |
| KR (1) | KR102019310B1 (en) |
| CN (1) | CN104428904A (en) |
| TW (1) | TWI590482B (en) |
| WO (1) | WO2014010486A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346560A (en) * | 2018-11-27 | 2019-02-15 | 江苏拓正茂源新能源有限公司 | A kind of preparation method of solar battery core |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017043518A1 (en) * | 2015-09-08 | 2017-03-16 | デクセリアルズ株式会社 | Solar battery module manufacturing method, solar battery module, and solar battery cell connecting method |
| CN107170841B (en) * | 2017-06-07 | 2021-01-22 | 苏州携创新能源科技有限公司 | Solar cell photovoltaic module and solar cell photovoltaic module |
| WO2023037885A1 (en) * | 2021-09-13 | 2023-03-16 | 株式会社カネカ | Solar battery device and solar battery module |
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- 2012-07-10 JP JP2012154583A patent/JP5889738B2/en active Active
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- 2013-07-03 CN CN201380036546.6A patent/CN104428904A/en active Pending
- 2013-07-03 KR KR1020157003030A patent/KR102019310B1/en active IP Right Grant
- 2013-07-03 WO PCT/JP2013/068258 patent/WO2014010486A1/en active Application Filing
- 2013-07-05 TW TW102124262A patent/TWI590482B/en active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2014017398A (en) | 2014-01-30 |
| KR20150032889A (en) | 2015-03-30 |
| KR102019310B1 (en) | 2019-09-06 |
| TWI590482B (en) | 2017-07-01 |
| TW201403843A (en) | 2014-01-16 |
| JP5889738B2 (en) | 2016-03-22 |
| WO2014010486A1 (en) | 2014-01-16 |
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