CN204885192U - Solar cell - Google Patents
Solar cell Download PDFInfo
- Publication number
- CN204885192U CN204885192U CN201390000966.4U CN201390000966U CN204885192U CN 204885192 U CN204885192 U CN 204885192U CN 201390000966 U CN201390000966 U CN 201390000966U CN 204885192 U CN204885192 U CN 204885192U
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- China
- Prior art keywords
- solar battery
- battery cell
- circuit board
- type solar
- electrode type
- Prior art date
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- 239000000463 material Substances 0.000 claims description 82
- 239000011230 binding agent Substances 0.000 claims description 56
- 239000008393 encapsulating agent Substances 0.000 claims description 44
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000010703 silicon Substances 0.000 abstract description 17
- 229910052710 silicon Inorganic materials 0.000 abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 16
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 64
- 238000004519 manufacturing process Methods 0.000 description 33
- 239000010408 film Substances 0.000 description 32
- 238000007789 sealing Methods 0.000 description 23
- 238000005452 bending Methods 0.000 description 20
- 238000010438 heat treatment Methods 0.000 description 11
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- 230000001070 adhesive effect Effects 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
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- 238000002788 crimping Methods 0.000 description 6
- 238000004904 shortening Methods 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
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- 229920000728 polyester Polymers 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003376 silicon Chemical class 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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- 230000003252 repetitive effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- H01L31/04—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
- H01L31/0516—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 specially adapted for interconnection of back-contact solar cells
-
- 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
The utility model relates to a solar cell, solar cell (1) is following structure: include the back electrode type solar cell unit (10) and the one side in insulating nature substrate (21) that are provided with two kinds of electrodes (N electrode (15), P electrode (16) that polarity is different in the one side of base plate (silicon substrate (11) be provided with with circuit board (20) of the wiring (N wiring (22) and P wiring (23) that the electrode pair was answered, the electricity connection is carried out in the electrode of back electrode type solar cell unit (10) and the wiring of circuit board (20), and insulating nature substrate (21) are bent to back electrode type solar cell unit (10) side bend, form trough (K) between the mutual adjacent electrode of back electrode type solar cell unit (10).
Description
Technical field
The utility model relates to the solar cell that can be used in solar power generation.
Background technology
In recent years, from the problem of the exhaustion of energy resource and the global environmental problems etc. as the increase of the carbon dioxide air, expect the exploitation of developing the clean energy, especially, the solar power generation employing solar cell is developed as the new energy, practical, further, the paces accelerated development.
As such solar cell, in the past, such as the solar battery cell of double-face electrode type is connected multiple and solar cell that is that formed becomes main flow, the solar battery cell of this double-face electrode type spreads the impurity of the conductivity type contrary with silicon substrate by the sensitive surface of the silicon substrate at monocrystalline or polycrystalline, thus form pn knot, form electrode respectively at the sensitive surface of this silicon substrate and the back side.
In addition, in recent years, also develop the sensitive surface of silicon substrate do not form electrode and its back side formed P electrode, N electrode so-called back electrode type solar battery cell.Overleaf in electrode type solar battery cell, owing to generally not there is electrode at sensitive surface, so not based on the shadow loss (Shadowloss) of electrode, expect to compare with the solar cell that the back side has electrode respectively with the sensitive surface at silicon substrate, high output can be obtained.
In addition, adopt to easily carry out the connection of solar battery cell and use circuit board, overleaf in electrode type solar battery cell, be used in the circuit board that insulating properties base material defines wiring gropingly and connect.
In addition, following solar cell and manufacture method thereof are proposed: in order to easily carry out such electrical connection operation, binding agent is used to bond solar battery cell and circuit board, thus the electrode connecting solar battery cell side and the wiring (for example, referring to patent documentation 1) arranged in circuit board.
In addition, circuit board is the substrate of the wiring pattern defining expectation in insulative substrate, but except use the circuit board of hard substrate as this insulative substrate except, the circuit board (for example, referring to patent documentation 2) with flexible film substrate using resin film etc. has also been proposed.
Prior art document
Patent documentation
Patent documentation 1: JP 2009-88145 publication
Patent documentation 2: JP 2010-16074 publication
Utility model content
The problem that utility model will solve
But, because the positive electricity pond recorded in patent documentation 1 is the structure being filled with binding agent and boning between solar battery cell and the circuit board defining wiring pattern on flat insulating properties base material, so needs come the gap between the non-formation region of electrode of landfill solar battery cell and insulating properties base material by a large amount of binding agents.
In addition, even the substrate employing resin film recorded in patent documentation 2, when using binding agent to be bonded to solar battery cell flat film substrate simply, same generation needs the gap come between the non-formation region of electrode of landfill solar battery cell and substrate (insulating properties base material) by a large amount of binding agents to be identical.
Like this, use a large amount of binding agents to the structure of bond solar battery cell and circuit board, productivity is deteriorated and becomes problem.Therefore, be contemplated to be and can use few binding agent to engage and solar cell outstanding in productivity and manufacture method thereof.
Therefore, the utility model is point in view of the above problems, its object is to, provide a kind of in the solar cell comprising back electrode type solar battery cell and circuit board, do not use a large amount of binding agents just can engage solar cell and the manufacture method thereof of solar battery cell and circuit board.
For solving the means of problem
In order to achieve the above object, the utility model provides a kind of solar cell, the one side being included in substrate is provided with the back electrode type solar battery cell of two kinds of different electrodes of polarity and is provided with the circuit board of the wiring of answering with described electrode pair in the one side of insulating properties base material, it is characterized in that, the described electrode of described back electrode type solar battery cell and the described wiring of described circuit board are electrically connected, described insulating properties base material is to described back electrode type solar battery cell lateral bend, recess is formed between the mutually adjacent described electrode of described back electrode type solar battery cell.
According to this structure, due to insulating properties base material rearwardly electrode type solar battery cell lateral bend and form recess between mutually adjacent electrode, so the use amount of the binding agent of filling in the gap between solar battery cell and insulating properties base material can be reduced.In addition, adjacent interelectrode insulating properties can also be guaranteed via this insulating properties base material.That is, the solar cell not using a large amount of binding agents just can engage solar battery cell and circuit board can be obtained.
In addition, preferably, between the mutually adjacent electrode of the valley portion of insulating properties base material electrode type solar battery cell overleaf, contact with back electrode type solar battery cell.
In addition, preferably, the valley portion of insulating properties base material and the opposed contacts side surfaces of mutually adjacent wiring.
In addition, preferably, described back electrode type solar battery cell and described circuit board use encapsulant and are sealed, and be filled with encapsulant, between the mutually adjacent wiring of circuit board, there is encapsulant via insulating properties base material at described recess.
In addition, the utility model provides a kind of manufacture method of solar cell, the one side that this solar cell is included in substrate is provided with the back electrode type solar battery cell of two kinds of different electrodes of polarity and is provided with the circuit board of the wiring of answering with described electrode pair in the one side of insulating properties base material, it is characterized in that, described manufacture method comprises following operation: cell location operation, in the mode that the described wiring of the described electrode of described back electrode type solar battery cell and described circuit board is opposed, described circuit board configures described back electrode type solar battery cell, lamination process, is set to light-transmitting substrate, the first encapsulant, the described circuit board being configured with described back electrode type solar battery cell and the second encapsulant structure according to this order overlap, base material bending operation, makes the described insulating properties base material of described circuit board to described back electrode type solar battery cell lateral bend, and sealing process, heat described structure and described first encapsulant and described second encapsulant are softened, thus the described circuit board being configured with described back electrode type solar battery cell is sealed.According to this structure, owing to not needing to use binding agent in order to ensure insulating properties, the manufacture method not using a large amount of binding agents just can engage the solar cell of solar battery cell and circuit board can be obtained.
In addition, preferably, in the manufacture method of the solar cell of said structure, use as insulating properties base material and there is flexible film substrate, base material bending operation be vacuumize and make film substrate rearwardly electrode type solar battery cell lateral bend vacuumize operation.
In addition, preferably, in the manufacture method of the solar cell of said structure, base material bending operation and sealing process, via the heating, vacuum crimping process using laminating machine device to carry out with predetermined heating-up temperature and predetermined Vacuum Pressure, carry out as a series of operation.
Utility model effect
According to the utility model, by the insulating properties base material of circuit board that the electrode surface of electrode type solar battery cell is overleaf installed rearwardly electrode type solar battery cell lateral bend and form recess between the mutually adjacent electrode of electrode type solar battery cell overleaf, the solar cell and the manufacture method thereof that do not use a large amount of binding agents just can engage solar battery cell and circuit board can be obtained.
Accompanying drawing explanation
Fig. 1 is the schematic cutaway view of the structure representing solar cell of the present utility model.
Fig. 2 is the schematic vertical view of the electrode structure representing the solar battery cell used in solar cell of the present utility model.
Fig. 3 is the schematic vertical view of the wire structures representing the circuit board used in solar cell of the present utility model.
Fig. 4 is the schematic vertical view of the first embodiment example representing the fixing solar battery cell of bonding on circuit board.
Fig. 5 is the schematic cutaway view of the cell location operation illustrated in the manufacture method of solar cell of the present utility model.
Fig. 6 is the schematic cutaway view of the lamination process illustrated in the manufacture method of solar cell of the present utility model.
Fig. 7 is the schematic vertical view of the second embodiment example representing the fixing solar battery cell of bonding on circuit board.
Fig. 8 is the schematic vertical view of the 3rd embodiment example representing the fixing solar battery cell of bonding on circuit board.
Fig. 9 is the schematic cutaway view of the major part structure of the completion status representing solar cell of the present utility model.
Embodiment
Hereinafter, with reference to the accompanying drawings of execution mode of the present utility model, but the utility model is not limited thereto.In addition, use identical label for identical member of formation, suitably the repetitive description thereof will be omitted.First, use Fig. 1 that the solar cell of present embodiment is described.
Fig. 1 represents the schematic cutaway view of an example of solar cell 1 of the present utility model.This solar cell 1 is formed as follows: engage solar battery cell 10 and circuit board 20, and seal integratedly via encapsulant 2 and form solar battery cell seal, the tow sides of this solar battery cell seal are covered by light-transmitting substrate 3 (glass substrate) and weatherability film 4 (notacoria (Backfilm)).
Here, the sensitive surface (face of the main incident side of sunlight) of the N-shaped of solar battery cell 10 or the silicon substrate 11 of p-type is formed with antireflection film 12, at the back side (face of the opposition side of sensitive surface) of silicon substrate 11, N-shaped Impurity Diffusion and the N-shaped impurity doping region 13 formed and p-type Impurity Diffusion and the p-type impurity doping region 14 formed alternately are formed across predetermined interval.
Namely, solar battery cell 10 due to present embodiment is the back electrode type solar battery cells 10 being provided with two kinds of different electrodes of polarity in the one side of substrate (silicon substrate 11), so following as required sometimes also referred to as solar battery cell 10, sometimes also referred to as back electrode type solar battery cell 10.
In addition, be formed with passivating film 17 at the back side of silicon substrate 11, by the contact hole formed on passivating film 17, form N electrode 15 in the mode touching N-shaped impurity doping region 13, form P electrode 16 in the mode touching p-type impurity doping region 14.
In addition, the structure forming other passivating films between silicon substrate 11 and antireflection film 12 can be also set to.Antireflection film 12 and passivating film 17 such as can be formed by silicon nitride film or silicon oxide film.
Circuit board 20 refers to the circuit board of the wiring pattern (N wiring 22 and P wiring 23) defining expectation on insulating properties base material 21, has and uses the raw-material circuit board of hard and use to have the circuit board of flexible thin film raw material as insulating properties base material.In the present embodiment, the circuit board 20 with flexibility employing and use the insulating properties base material 21 of the film of the polyesters of PET (polyethylene terephthalate) or PEN (PEN) etc. is set to.
This circuit board 20 makes such as to become the insulating properties film of base material and metal forming and uses binding agent etc. and fit; after metal foil surface defines the resist of protection with the shape expected; etch processes is carried out to the metal forming exposed; remove resist, thus form the circuit board 20 with the wiring pattern of expectation.
That is, the solar cell of present embodiment be the one side being included in substrate (silicon substrate 11) be provided with two kinds of different electrodes of polarity back electrode type solar battery cell 10, the one side of insulating properties base material 21 be provided with answer with described electrode pair wiring (N connect up 22 and P connect up 23) the solar cell 1 with flexible circuit board 20.
As mentioned above, because circuit board 20 is formed by having flexible film substrate, so by after fitting with back electrode type solar battery cell 10, vacuumize, thus it can be easily made to bend.In addition, making it be out of shape by heating, also can easily make it bend.In any one situation, can both it be made to bend according to the surface configuration of the other side's component of will carry out fitting (joint).
Therefore, the solar cell 1 of present embodiment becomes following structure: the electrode (N electrode 15, P electrode 16) of back electrode type solar battery cell 10 and the wiring (N wiring 22 and P wiring 23) of circuit board 20 are electrically connected, insulating properties base material 21 (the base material bending operation via predetermined) rearwardly electrode type solar battery cell lateral bend, between the mutually adjacent electrode of electrode type solar battery cell 10 overleaf (between mutually adjacent wiring) form recess K.
If this structure, then due to insulating properties base material 21 rearwardly electrode type solar battery cell lateral bend and form recess K between mutually adjacent electrode (N electrode 15 and P electrode 16), so the use amount of the binding agent of filling in the gap between solar battery cell and insulating properties base material 21 can be reduced.In addition, adjacent interelectrode insulating properties can also be guaranteed via this insulating properties base material 21.That is, the solar cell 1 not using a large amount of binding agents just can engage solar battery cell 10 and circuit board 20 can be obtained.
In addition, as long as touch the structure of back electrode type solar battery cell 10 between the mutually adjacent electrode of the valley portion of insulating properties base material 21 electrode type solar battery cell 10 overleaf, then owing to reliably can insulate between this adjacent electrode, so do not need to use binding agent in order to ensure insulating properties, further, the use amount of binding agent can be reduced, so preferably.
In addition, preferably, the valley portion of insulating properties base material 21 touches the opposed side of mutually adjacent wiring.If this structure, then reliably can insulate between adjacent wiring, further, can between adjacent wiring packing matcrial.Therefore, via the encapsulant of filling in this recess K, reliably can insulate between adjacent wiring, and the position deviation of solar battery cell 10 and circuit board 20 reliably can be prevented.In addition, the gap owing to can be come between landfill electrode by encapsulant, between wiring, so can improve the intensity of the machinery of solar cell 1.
Then, use Fig. 2 that the electrode (N electrode 15, P electrode 16) arranged in solar battery cell 10 is described, use Fig. 3 explanation to comprise the circuit board 20 of N wiring 22 and P wiring 23.
Such as, as shown in Figure 2, the electrode (N electrode 15, P electrode 16) arranged in the solar battery cell 10 of present embodiment becomes and alternately arranges banded N electrode 15 and the structure of P electrode 16 in the one side of silicon substrate 11 along the above-below direction of figure.That is, alternately arrange with comb teeth-shaped at two kinds of electrodes that the one side polarity of substrate is different.
In addition, such as, as shown in Figure 3, comprise the elongate in shape multiple solar battery cell 10 one engaged is become to the circuit board 20 of the wiring that this electrode is electrically connected.As shown in Figure 3, the circuit board 20 of present embodiment has the length 4 solar battery cell 10 one engaged.Further, on the insulating properties base material 21 of this length, the N corresponding with the N electrode 15 of the band shape that 4 solar battery cells 10 have and P electrode 16 connect up 22 and P connect up and 23 to be integrally formed respectively.
In addition, be provided with for N corresponding respectively for the solar battery cell 10 with adjacent is connected up 22 and P to connect up 23 connecting electrodes 24 carrying out being electrically connected, an end of the long side direction of insulating properties base material 21 is provided with bus P electrode 25, another end is provided with bus N electrode 26.
In addition, although not shown, but the mark of the aligned in position for carrying out the solar battery cell 10 that will engage or slit (Slit) etc. are preferably set, make it possible to multiple solar battery cell 10 to be engaged (laminating) and arrive position accurately, thus the connection error of wiring can be suppressed.
This circuit board 20 is bondd the solar battery cell 10 and wiring (N wiring 22 and P wiring 23) of the electrode (N electrode 15, P electrode 16) of solar battery cell 10 side and circuit board 20 side being engaged.The joint of this electrode and wiring can use known conductive adhesive or scolding tin to carry out, but can also with under the state that aligned in position has been carried out in the wiring of the electrode of solar battery cell 10 side and circuit board 20 side, bonding solar battery cell 10 and circuit board 20.
Therefore, in the present embodiment, by the part configuration binding agent in the region beyond electrode or wiring, with under the state that solar battery cell 10 pairs of circuit boards 20 are temporarily fixed, seal integratedly via aforesaid encapsulant 2, thus the wiring of the electrode of solar battery cell 10 side and circuit board 20 side can be electrically connected.
Therefore, the connection of the wiring of circuit board 20 and the electrode of solar battery cell 10 does not use conductive adhesive or scolding tin, but can directly contact and connect, so except the shortening of manufacturing process, the resistance in connecting portion can also be reduced, the electrical characteristics of solar cell can be become good.
Such as, in the example (the first execution mode) shown in Fig. 4, the region configuring this binding agent arranges 2 places on diagonal to 1 solar battery cell 10.
That is, in the first execution mode shown in Fig. 4, on the insulating properties base material 21 of circuit board 20,2 place's configuration binding agent SB1, SB2 on the diagonal of the position of respective solar battery cell 10 are engaged.Thereby, it is possible to make the position consistency of the electrode (N electrode 15, P electrode 16) of solar battery cell 10 side and the wiring (N wiring 22 and P wiring 23) of circuit board 20 side, solar battery cell 10 pairs of circuit boards 20 are temporarily fixed.
Like this, in the present embodiment, in the peripheral part of solar battery cell 10, part uses binding agent SB (SB1, SB2) and the circuit board 20 that bonds.This binding agent SB preferably has the binding agent (comprising adhesive) of insulating properties, such as, can use silicon class binding agent, propylene class binding agent, epoxy resin binding agent, rubber-like binding agent etc.
In addition, also between the insulating properties base material 21 of circuit board 20 and solar battery cell 10, in order to improve their close property, resin can be configured in the mode in landfill gap.
After whole solar battery cell 10 pairs of circuit boards 20 are temporarily fixing, carry out aforesaid encapsulant 2 or light-transmitting substrate 3 or weatherability film 4 etc. to carry out the lamination process of stacked formation and heat-sealable material 2 and the sealing process of the after-hardening that makes it softening.
Encapsulant 2 preferably uses the light transmission sealing material of EVA (vinyl-vinyl-acetoxy group) resin etc., by carry out by the EVA resin of sheet by the solar battery cell 10 of fitting and circuit board 20 carry out up and down stacked, and heat while the sealing process of vacuum compressing, the encapsulant 2 of structure solar battery cell 10 and circuit board 20 sealed integratedly can be formed.
Like this, by carrying out solar battery cell 10 and circuit board 20 to carry out stacked with other component, structure that is that form is heated to predetermined temperature while be evacuated to the sealing process of predetermined Vacuum Pressure, make insulating properties base material 21 rearwardly electrode type solar battery cell 10 lateral bend and form recess K, softening encapsulant is filled into this recess K.
That is, the predetermined temperature in sealing process or predetermined Vacuum Pressure be, the insulating properties base material 21 of use is bending and form recess K and the encapsulant used softens and is filled into the temperature of recess K and Vacuum Pressure.Like this, by there is encapsulant via insulating properties base material 21 between the mutually adjacent wiring of circuit board 20, the crimping degree of solar battery cell 10 and circuit board 20 improves, and can improve adjacent interelectrode insulating properties.Therefore, it is possible to reliably carry out the electrical connection of the electrode of solar battery cell 10 side and the wiring of circuit board 20 side, do not need in order to ensure interelectrode insulating properties and use binding agent in a large number, solar cell 1 outstanding in productivity can be provided in.
Like this, owing to being heated to predetermined temperature in sealing process, so as binding agent SB, also represent stable fusible binding agent even if preferably use when being exposed on this predetermined temperature.In addition, by the adhesiveness of also playing stably after the heating, the reliability of the electrical connection of solar battery cell 10 and circuit board 20 can be maintained.
Because insulating properties base material 21 is preferably relatively more cheap and play reliable insulating properties, and form the material of recess K to solar battery cell 10 lateral bend by vacuumizing and thickness, so in the present embodiment, use the film of the polyesters of PET (polyethylene terephthalate) or PEN (PEN) etc.In addition, its thickness can be said and be preferably about 25 ~ 150 μm, more preferably about 50 ~ 100 μm.
Then, Fig. 5, Fig. 6 is used to further illustrate the manufacture method of the solar cell of present embodiment.
The manufacture method of the solar cell of present embodiment is that the one side being included in substrate (silicon substrate 11) is provided with the back electrode type solar battery cell 10 of two kinds of different electrodes of polarity and is provided with the manufacture method of solar cell 1 of circuit board 20 of the wiring of answering with described electrode pair in the one side of insulating properties base material 21.
In addition, comprise following operation: cell location operation, in the mode that the wiring of the electrode of back electrode type solar battery cell 10 and circuit board 20 is opposed, circuit board configures back electrode type solar battery cell 10; Lamination process, is set to light-transmitting substrate 3, first encapsulant 2A, the circuit board 20 being configured with back electrode type solar battery cell 10 and the second encapsulant 2B structure according to this order overlap; Base material bending operation, makes the insulating properties base material 21 rearwardly electrode type solar battery cell lateral bend of circuit board 20; And sealing process, heating configuration thing 30 and the first encapsulant 2A and the second encapsulant 2B is softened, thus the circuit board 20 being configured with back electrode type solar battery cell 10 is sealed.
Such as, Fig. 5 represents the schematic cutaway view that cell location operation is described, Fig. 6 represents the schematic cutaway view that lamination process is described.As shown in Figure 5, in the cell location operation of present embodiment, one side at silicon substrate 11 is alternately provided with to the back electrode type solar battery cell 10 of the structure of the different N electrode of polarity 15 and P electrode 16, to alternately be provided with the circuit board 20 of the structure of N wiring 22 and P wiring 23 on the insulating properties base material 21 be made up of resin film, such as, 2 places on its diagonal bond via binding agent SB.
Here, binding agent SB also can be configured in the non-formation region of electrode of back electrode type solar battery cell 10, but due to the space in the non-formation region of wiring of circuit board 20 wider, if so consider productivity, be then preferably configured in circuit board 20 side.
That is, in the cell location operation of the present embodiment shown in Fig. 5, in the mode of the electrode contraposition of the wiring of circuit board 20 and back electrode type solar battery cell 10, circuit board 20 configures back electrode type solar battery cell 10.Here, the binding agent SB of the part configuration in the non-formation region of the wiring of circuit board 20 touches the non-formation region of electrode of back electrode type solar battery cell 10, thus circuit board 20 and back electrode type solar battery cell 10 bond, and temporarily fix.
Thus, in the lamination process shown in Fig. 6, to be formed the second encapsulant 2B of the first encapsulant 2A of light-transmitting substrate 3 (glass substrate), sheet, the circuit board 20 being temporarily fixed with back electrode type solar battery cell 10, sheet, weatherability film 4 (notacoria) from upper according to the stacked structure 30 of this order.
Then, this structure 30 is arranged on laminating machine device.Further, by carrying out being heated to the sealing process that predetermined temperature is evacuated to predetermined Vacuum Pressure in laminating machine device, structure 30 is upwards crimped below thereon.So the insulating properties base material 21 of circuit board 20 softens, and extend and bend to cell side, electrode type solar battery cell 10 side forms recess K overleaf.
In addition, in the process that insulating properties base material 21 is softening and bending, in the mode in the gap between landfill back electrode type solar battery cell 10 and circuit board 20, its gap is reduced.Further, become encapsulant 2A, 2B soften and be filled into the structure of this recess K.In addition, the first encapsulant 2A becomes to be integrated with the second encapsulant 2B, forms aforesaid encapsulant 2.
Here, make the insulating properties base material 21 of the circuit board 20 rearwardly base material bending operation of electrode type solar battery cell lateral bend and heating configuration thing 30 and the first encapsulant 2A and the second encapsulant 2B is softened thus the circuit board 20 being configured with back electrode type solar battery cell 10 is carried out the sealing process that seals, also above-mentioned laminating machine device can be used to carry out as a series of operation, but these base material bending operations and sealing process also can be made independently to carry out.
In that case, can to adopt circuit board 20 and back electrode type solar battery cell 10 are bondd temporarily fixing after the method that vacuumizes or blow hot blast and heat the method etc. crimped by air pressure.But, due in the manufacturing process of solar cell 1, adopt and heat the sealing process vacuumized, so sealing operation can be utilized and implement base material bending operation.Like this, if the method for base material bending operation and sealing process being carried out as a series of operation, then can realize the shortening of manufacturing process, on cost or in simplification operation, all become effective manufacture method, so better.
Such as, via the laminating machine device carrying out heating, vacuum crimping process with predetermined heating-up temperature and predetermined Vacuum Pressure, base material bending operation and sealing process can be implemented as a series of operation.If this structure, then can realize the shortening of manufacturing process, on cost or in simplification operation, all become effective manufacture method, so better.
That is, by using laminating machine device, vacuum compressing operation and heat hardening operation being carried out as a series of operation, above-mentioned base material bending operation and sealing process can be implemented continuously.Such as, by back electrode type solar battery cell 10 and encapsulant 2 (EVA) and light-transmitting substrate 3 and the stacked integratedly structure 30 of weatherability film 4 are arranged on laminating machine device, carry out vacuum exhaust while between keeping 7 points with 140 DEG C after (vacuum compressing operation), with 145 DEG C of heating, 40 minutes (heat hardening operation), thus EVA hardens and back electrode type solar battery cell 10 is carried out crimping sealing, makes solar cell 1.
In addition, in above-mentioned, to describe near the peripheral part in cell location region in the part in the non-formation region of the wiring of circuit board, by binding agent (jointing material) SB to a unit (back electrode type solar battery cell 10) on the diagonal 2 sentence the structure (the first execution mode) that point-like arranges, but the allocation position of this binding agent (jointing material) SB is not limited to such structure.
Such as, in the example (the second execution mode) shown in Fig. 7, adopt the binding agent SB1 ~ SB4 being configured to the point-like of many places (to being 2 places, 4 places being added up to a unit) to unit.In addition, in the example (the 3rd execution mode) shown in Fig. 8, binding agent SB5, SB6 of sentencing wire configuration on 2 of mutually opposing limit is adopted.
In any one situation, all equally near the peripheral part in cell location region, in the part in the non-formation region of the wiring of circuit board 20, configure binding agent SB (SB1 ~ SB6), circuit board 20 and solar battery cell 10 are fitted.That is, owing to not needing wiring forming region configuration binding agent (comprising adhesive) in substrate inside, so the amount of binding agent or adhesive can be reduced.
Namely, as long as necessary binding agent or the amount of adhesive are in base material bending operation or sealing process, circuit board 20 and solar battery cell 10 can be bonded as the degree not producing position deviation and the degree that can temporarily fix, and also can arrange binding agent SB (SB1 ~ SB6) with point-like or wire in the many places only near the peripheral part in cell location region.
As mentioned above, the manufacture method of the solar cell of present embodiment comprises following operation: cell location operation, the part configuration binding agent SB in the region beyond electrode or wiring, thus the circuit board 20 and solar battery cell 10 with flexibility are temporarily fixed; Lamination process, forms structure 30; Base material bending operation, makes the insulating properties base material 21 of circuit board 20 to solar battery cell lateral bend; And sealing process, heating configuration thing 30 and sealing.
If the manufacture method of this solar cell, then use binding agent, so the manufacture method not using a large amount of binding agents just can engage the solar cell of solar battery cell 10 and circuit board 20 can be obtained owing to not needing in order to ensure the insulating properties in wiring forming region.
Make solar cell 1 through operation described above, as shown in Figure 9, complete the framework 40 of installing aluminum around solar cell 1 and in order to externally power taking and mounting terminal case 8 and modular solar battery module M.The electric energy that solar battery module M generates is enough to be taken out via output cable 81.
In addition, also can be set to by by the part beyond glass substrate 3 by by have suppress moisture through the metallic film of function and the resin film with insulating properties carried out stacked laminate film and covered, thus effectively suppress the structure of the immersion of the moisture for solar cell 1, be set to the structure of the framework 40 embedding aluminum in its periphery further.
As mentioned above, the first means solved based on problem of the present utility model are, a kind of solar cell 1, the one side being included in substrate (silicon substrate 11) is provided with two kinds of different electrode (N electrode 15 of polarity, P electrode 16) back electrode type solar battery cell 10 and the one side of insulating properties base material 21 be provided with answer with described electrode pair wiring (N connect up 22 and P connect up 23) circuit board 20, the electrode of back electrode type solar battery cell 10 and the wiring of circuit board 20 are electrically connected, insulating properties base material 21 is electrode type solar battery cell 10 lateral bend rearwardly, recess K is formed between the mutually adjacent described electrode of electrode type solar battery cell 10 overleaf.
The effect of these the first means is, due to insulating properties base material 21 rearwardly electrode type solar battery cell lateral bend and form recess K between mutually adjacent electrode, so the use amount of the binding agent of filling in the gap between solar battery cell 10 and insulating properties base material 21 can be reduced.In addition, adjacent interelectrode insulating properties can also be guaranteed via this insulating properties base material 21.That is, the solar cell 1 not using a large amount of binding agents just can engage solar battery cell 10 and circuit board 20 can be obtained.
Solve and be based on the second means of problem of the present utility model, between the mutually adjacent electrode of the valley portion of insulating properties base material 21 electrode type solar battery cell 10 overleaf, touch back electrode type solar battery cell 10.The effect of this second means is, owing to reliably can insulate between adjacent electrode, so do not need to use binding agent in order to ensure insulating properties, further, can reduce the use amount of binding agent.
The 3rd means solved based on problem of the present utility model are, the valley portion of insulating properties base material 21 touches the opposed side of mutually adjacent wiring.The effect of the 3rd means is, reliably can insulate between adjacent wiring, further, can between adjacent wiring packing matcrial.
The 4th means solved based on problem of the present utility model are, back electrode type solar battery cell 10 and circuit board 20 use encapsulant 2 and are sealed, be filled with encapsulant 2 at recess K, between the mutually adjacent wiring of circuit board 20, there is encapsulant via insulating properties base material 21.The effect of the 4th means is, via the encapsulant of filling at recess K, reliably insulate between adjacent electrode and the connecting portion of wiring, further, the position deviation of solar battery cell 10 and circuit board 20 reliably can be prevented.
The 5th means solved based on problem of the present utility model are, a kind of manufacture method of solar cell 1, the one side that this solar cell 1 is included in substrate is provided with the back electrode type solar battery cell 10 of two kinds of different electrodes of polarity and is provided with the circuit board 20 of the wiring of answering with described electrode pair in the one side of insulating properties base material 21, described manufacture method comprises following operation: cell location operation, in the mode that the wiring of the electrode of back electrode type solar battery cell 10 and circuit board 20 is opposed, circuit board configures back electrode type solar battery cell 10; Lamination process, is set to light-transmitting substrate 3, first encapsulant 2A, the circuit board 20 being configured with back electrode type solar battery cell 10 and the second encapsulant 2B structure 30 according to this order overlap; Base material bending operation, makes the insulating properties base material 21 rearwardly electrode type solar battery cell lateral bend of circuit board 20; And sealing process, heating configuration thing 30 and the first encapsulant 2A and the second encapsulant 2B is softened, thus the circuit board 20 being configured with back electrode type solar battery cell 10 is sealed.The effect of the 5th means is, uses binding agent owing to not needing in order to ensure adjacent interelectrode insulating properties, can obtain the manufacture method not using a large amount of binding agents just can engage the solar cell 1 of solar battery cell 10 and circuit board 20.
Solve and be based on the 6th means of problem of the present utility model, use as insulating properties base material and there is flexible film substrate, base material bending operation be vacuumize and make described film substrate rearwardly electrode type solar battery cell lateral bend vacuumize operation.The effect of the 6th means is, vacuumizes, thus can easily implement base material bending operation by having flexible film substrate.
The 7th means solved based on problem of the present utility model are, the heating, vacuum crimping process that base material bending operation and sealing process carry out with predetermined heating-up temperature and predetermined Vacuum Pressure via use laminating machine device, the manufacture method of the solar cell 1 carried out as a series of operation.The effect of the 7th means is, can carry out the heating, vacuum crimping process of vacuum compressing, base material bending operation and sealing process being implemented as a series of operation via being heated to predetermined temperature.Therefore, it is possible to realize the shortening of manufacturing process, on cost or in simplification operation, all become effective manufacture method.
As mentioned above, according to the utility model, by the insulating properties base material of circuit board that the electrode surface of electrode type solar battery cell is overleaf installed rearwardly electrode type solar battery cell lateral bend and form recess between the mutually adjacent electrode of electrode type solar battery cell overleaf, the solar cell and the manufacture method thereof that do not use a large amount of binding agents just can engage solar battery cell and circuit board can be obtained.
In addition, because the connection of the wiring of circuit board and the electrode of back electrode type solar battery cell does not use conductive adhesive, but can directly contact and connect, so except the shortening of manufacturing process, the resistance in connecting portion can also be reduced, the electrical characteristics of solar cell can be become good.
Utilizability in industry
Because solar cell of the present utility model and method thereof do not use a large amount of binding agents just can engage solar battery cell and circuit board, require to realize the shortening of manufacturing process and the solar cell of cost degradation and manufacture method thereof so can suitably be used in.
Description of reference numerals
1 solar cell
2 encapsulants
3 light-transmitting substrates
4 weatherability films
10 solar battery cells (back electrode type solar battery cell)
11 silicon substrates
12 antireflection films
13n type impurity doping region
14p type impurity doping region
15N electrode
16P electrode
17 passivating films
20 circuit boards
21 insulating properties base materials
22N connects up
23P connects up
30 structures
40 frameworks
K recess
M solar battery module
SB (SB1 ~ SB6) binding agent
Claims (4)
1. a solar cell, the one side being included in substrate is provided with the back electrode type solar battery cell of two kinds of different electrodes of polarity and is provided with the circuit board of the wiring of answering with described electrode pair in the one side of insulating properties base material, it is characterized in that,
The described electrode of described back electrode type solar battery cell and the described wiring of described circuit board are electrically connected,
Described insulating properties base material, to described back electrode type solar battery cell lateral bend, forms recess between the mutually adjacent described electrode of described back electrode type solar battery cell,
The valley portion of described insulating properties base material, between the mutually adjacent described electrode of described back electrode type solar battery cell, contacts with described back electrode type solar battery cell.
2. solar cell as claimed in claim 1, is characterized in that,
The valley portion of described insulating properties base material and the opposed contacts side surfaces of mutually adjacent described wiring.
3. solar cell as claimed in claim 1, is characterized in that,
Described back electrode type solar battery cell and described circuit board use encapsulant and are sealed, be filled with encapsulant at described recess, between the mutually adjacent described wiring of described circuit board, there is described encapsulant via described insulating properties base material.
4. solar cell as claimed in claim 1, is characterized in that,
Described back electrode type solar battery cell and described circuit board use encapsulant and are sealed, different from described encapsulant, the insulating properties binding agent of the described back electrode type solar battery cell of bonding and described circuit board is provided with at the peripheral part of described back electrode type solar battery cell.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012268174A JP6047389B2 (en) | 2012-12-07 | 2012-12-07 | Solar cell and method for manufacturing the same |
| JP2012-268174 | 2012-12-07 | ||
| PCT/JP2013/077556 WO2014087736A1 (en) | 2012-12-07 | 2013-10-10 | Solar cell and method for manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204885192U true CN204885192U (en) | 2015-12-16 |
Family
ID=50883164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201390000966.4U Expired - Fee Related CN204885192U (en) | 2012-12-07 | 2013-10-10 | Solar cell |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6047389B2 (en) |
| CN (1) | CN204885192U (en) |
| WO (1) | WO2014087736A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017150104A1 (en) * | 2016-03-04 | 2017-09-08 | シャープ株式会社 | Photoelectric conversion element and photoelectric conversion module |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3679478B2 (en) * | 1995-11-29 | 2005-08-03 | 三洋電機株式会社 | Bending film-like solar cell element |
| JP2009043842A (en) * | 2007-08-07 | 2009-02-26 | Sharp Corp | Solar battery module |
| JP2011159779A (en) * | 2010-02-01 | 2011-08-18 | Hitachi Cable Ltd | Solar cell module, and method of manufacturing the same |
| JP5123409B2 (en) * | 2011-03-30 | 2013-01-23 | シャープ株式会社 | Method for manufacturing solar cell with wiring board and method for manufacturing solar cell module |
-
2012
- 2012-12-07 JP JP2012268174A patent/JP6047389B2/en active Active
-
2013
- 2013-10-10 WO PCT/JP2013/077556 patent/WO2014087736A1/en active Application Filing
- 2013-10-10 CN CN201390000966.4U patent/CN204885192U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP6047389B2 (en) | 2016-12-21 |
| WO2014087736A1 (en) | 2014-06-12 |
| JP2014116395A (en) | 2014-06-26 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 |