CN101047211B - Solar battery array - Google Patents
Solar battery array Download PDFInfo
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- CN101047211B CN101047211B CN 200710091320 CN200710091320A CN101047211B CN 101047211 B CN101047211 B CN 101047211B CN 200710091320 CN200710091320 CN 200710091320 CN 200710091320 A CN200710091320 A CN 200710091320A CN 101047211 B CN101047211 B CN 101047211B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
It is an object of the present invention to provide a photovoltaic module capable of reducing an area occupied by interconnectors. The photovoltaic module of the present invention comprises light-transmitting substrate, strings (40) including a plurality of solar cells (11) interconnected through tab connector (16), and rear surface member. A plurality of the strings (40) is electrically connected through interconnectors (41) (42) (43) (44) (45) and arranged on a rear surface side so as not to overlap each other. The photovoltaic module is sealed with a sealant between the light-transmitting substrate and the rear surface member. Interconnectors are settled.
Description
Technical field
The present invention relates to solar module, particularly relate to by encapsulant a plurality of solar battery cells are sealed in the solar module between light-transmitting substrate and the backing material.
Background technology
Because the solar cell light Direct Transform of the sun of automatically cleaning, unending energy source in the future is an electric energy, so gazed at from the viewpoint of earth environment.
When solar cell is used for the power supply of family or building etc.; Since the output of a solar battery cell only have several W (watt) degree; Too little, so normally a plurality of solar battery cells are connected in series, can reach hundreds of watts solar module and use as output.
According to Figure 20 and Figure 21 existing solar module is explained.Figure 20 is the sectional view of a part of structure of the existing solar module of expression, and Figure 21 is the stereogram of existing solar module.
Shown in figure 20; The tab 802 that is made up of conductive materials such as Copper Foils is electrically connected a plurality of solar battery cells 800 each other; Ethylene vinyl acetate) etc. by the EVA of weatherability, excellent moisture resistance (ethylenevinylacetate: have the encapsulant 840 of light transmission, it is sealed in glass, light transmission plastics etc. has the surface elements 830 of light transmission and have between the back part 820 that the film of weatherability constitutes.
Shown in figure 21, a plurality of solar battery cells 800 ... Be connected in series by tab 802, constitute a unit cell (battery pack) 810.These unit cells 810, use to connect promptly so-called connecting wiring 811 and connecting between 810 with wiring.These connecting wirings 811 be arranged on solar battery cell 800 around.And then, be used for the output from these solar battery cells 800 is drawn out to outside lead-out wire, in not shown terminal box, be connected with connecting wiring 811.
Form solar battery panel like this, metal housing 850 is installed around this solar battery panel, constitute solar module.
Above-mentioned solar battery panel; Be stack surface parts 830, face side encapsulant sheet, connecting wiring 802, a plurality of solar battery cells 800, rear side encapsulant sheet, the back part 820 that connect by connecting wiring 811 etc. in order; Be arranged at the device that is called as laminator (laminater), integral forming through heating under reduced pressure.
Yet,, hope that the sectional area of above-mentioned connecting wiring 811 is big from reducing the viewpoint of ohmic loss.On the other hand, these connecting wirings 811 are arranged on the outside of unit cell 810.Therefore, when connecting wiring 811 occupied areas increased, the area of this part solar battery panel increased.This ratio that can cause power generation region in the assembly area (light-receiving area) reduces.Consequently cause the decrease in efficiency of assembly.
Therefore, in the prior art, from the viewpoint of the efficient of assembly, through making the narrowed width of connecting wiring 811, the corresponding increase of thickness reaches the purpose that reduces ohmic loss.
The about 300 μ m of above-mentioned existing connecting wiring 811 used thicknesses, the Copper Foil of the about 2mm～7mm of width is whole ground to apply scolding tin above that, is cut to the length of regulation and uses.
And; The connecting wiring that has also proposed to be provided with around the solar battery cell is inconspicuous, improves the motion (opening the 2005-79170 communique with reference to Japanese Patent Laid) of solar module of aesthetic property of the overall appearance of the building that is provided with solar module.What in this patent documentation, record and narrate is, in the painted sensitive surface side charging material of peripheral end configuration of solar module, the structure of hidden wiring etc.
Summary of the invention
Yet, in above-mentioned solar module, have the problem that the occupied area that can not generate electricity of connecting wiring causes the decrease in efficiency of assembly.
And above-mentioned solar module uses the laminator device to carry out integrated.At this moment, increase, or above-mentioned wiring takes place at the fashionable bubble that will cause of layer when having lap if be positioned at the thickness of the connecting wiring etc. of periphery.Have this bubble and cause the problem of decrease in yield in the manufacturing process.
The present invention proposes in view of the above problems, and its first purpose is to provide the solar module that can reduce the occupied area of connecting wiring.
And then second purpose of the present invention is, provides and can reduce the fashionable stress for solar battery cell of layer, suppresses the solar modules such as cracking of fashionable bubble that is easy to generate of layer and solar battery cell.
Solar module of the present invention is to be provided with light-transmitting substrate; The unit cell that constitutes by a plurality of solar battery cells that connect through tab; Backing material being electrically connected a plurality of above-mentioned unit cells by connecting wiring when, is sealed to the solar module between above-mentioned light-transmitting substrate and the backing material by encapsulant, it is characterized by above-mentioned connecting wiring and is disposed at rear side.
And, can be that above-mentioned connecting wiring disposes with mutual nonoverlapping mode in the rear side of above-mentioned solar battery cell.
And, can be that above-mentioned connecting wiring uses by having the metal forming that adhering stack membrane covers.
And then above-mentioned unit cell is characterised in that: close on each other reverse with the polarity of the solar battery cell of one side side, connect by tab, the polarity of the solar cell of adjacent unit cell is reverse each other.
Above-mentioned connecting wiring can use live width to be the big tab of the width more than 200 times of thickness.Metal forming below the above 300 μ m of above-mentioned connecting wiring used thickness 100 μ m.
And, there is the interval of 2mm to get final product between the above-mentioned connecting wiring.
The present invention can reduce the occupied area of connecting wiring through connecting wiring being disposed at the back side of solar battery cell, improves the efficient of assembly.
And, through attenuate connecting wiring and configuration overlappingly each other, can suppress the generation of bubble etc.And, because the width that connecting wiring forms is big,, can suppress breaking by the concentrated solar battery cell that causes of stress so even under reduced pressure apply pushing force, solar battery cell also disperses greatly.
And, through using, carry out fixing and unit cell temporary fixed of insulant by the metal forming that stack membrane covered with adhesion, it is easy that the assembling of solar cell also becomes.
And then the polarity of the solar cell through making adjacent unit cell is reverse each other, can further enlarge the width of connecting wiring, reduces the resistance of connecting wiring.
Description of drawings
Fig. 1 is the approximate three-dimensional map of solar module in the expression execution mode of the present invention.
Fig. 2 is the summary sectional view of the solar battery panel that uses in the solar module of the present invention of expression.
Fig. 3 is the summary sectional view of the solar battery cell that uses in the execution mode of the present invention of expression.
Fig. 4 is an approximate three-dimensional map of representing the connection status between the battery pack first execution mode of the present invention from rear side.
Fig. 5 is the CD circuit description figure of the connection status between the battery pack in pattern ground expression first execution mode of the present invention.
Fig. 6 is a summary construction diagram of making the manufacturing installation of solar battery panel.
Fig. 7 is the summary sectional view of the solar battery panel that uses in the solar module in expression second execution mode of the present invention.
Fig. 8 is the summary sectional view of the solar battery panel that uses in the solar module in expression second execution mode of the present invention.
Fig. 9 is an approximate three-dimensional map of representing the connection status between the battery pack second execution mode of the present invention from rear side.
Figure 10 is the CD circuit description figure of the connection status between the battery pack in pattern ground expression second execution mode of the present invention.
Figure 11 is an approximate three-dimensional map of representing the connection status between the battery pack the 3rd execution mode of the present invention from rear side.
Figure 12 is an approximate three-dimensional map of representing the connection status between the battery pack the 4th execution mode of the present invention from rear side.
Figure 13 is an approximate three-dimensional map of representing the variation of the connection status between the battery pack the execution mode of the present invention from rear side.
Figure 14 is an approximate three-dimensional map of representing the variation of the connection status between the battery pack the execution mode of the present invention from rear side.
Figure 15 is an approximate three-dimensional map of representing the variation of the connection status between the battery pack the execution mode of the present invention from rear side.
Figure 16 is that the units in series of representing solar battery cell end in embodiments of the present invention connects the approximate three-dimensional map with the example of the method for attachment of tab and back side connecting wiring.
Figure 17 is that the units in series of representing solar battery cell end in embodiments of the present invention connects the approximate three-dimensional map with the example of the method for attachment of tab and back side connecting wiring.
Figure 18 is that the units in series of representing solar battery cell end in embodiments of the present invention connects the approximate three-dimensional map with the example of the method for attachment of tab and back side connecting wiring.
Figure 19 representes the approximate three-dimensional map of the configuration relation of the connecting wiring at the back side in embodiments of the present invention.
Figure 20 is the sectional view of the part-structure of the existing solar module of expression.
Figure 21 is the stereogram of existing solar module.
Embodiment
Use accompanying drawing to specify execution mode of the present invention below.Wherein, part same or suitable among the figure is all given same symbol, and for fear of numerous and diverse, for the key element after once explaining, later repeat specification is omitted.
Fig. 1 is the approximate three-dimensional map of solar module in the expression execution mode of the present invention.Fig. 2 is the summary sectional view of the solar battery panel 10 that uses in the solar module of the present invention of expression.
As depicted in figs. 1 and 2, solar module 1 of the present invention is provided with a plurality of solar battery cells 11 ...This solar battery cell 11; Be to use substantive ground clamping intrinsic amorphous silicon layer between the crystal type battery unit that has monocrystalline silicon and polysilicon etc. to constitute and monocrystalline silicon substrate and amorphous silicon layer; Reduce its boundary defect, improved the solar battery cell of xenogenesis (hetero) combination interface characteristic.Above-mentioned solar module 1 has the plate-shaped solar battery panel 10 that comprises a plurality of solar battery cells 11, with the housing 20 that embeds these solar battery panel 10 peripheries through encapsulant, is made up of aluminium.
These a plurality of solar battery cells 11 are connected in series by the tab 16 that Copper Foil of flat etc. is constituted with other solar battery cell 11 that adjoins each other separately.In other words, the distolateral collector electrode that is connected in a side above the solar battery cell 11, the collector electrode of the following side of another solar battery cell 11 of another the distolateral solar battery cell that is connected in and stipulates 11 adjacency simultaneously of tab 16.Like this, a plurality of solar battery cell 11 ... The tab 16 that is made up of electroconductive components such as Copper Foils is electrically connected each other.These a plurality of solar battery cells 11 ... The surface elements 12 that has light transmission at glass, light transmission plastics etc.; Ethylene vinyl acetate) etc. and between the back part 13 that constitutes by the film of weatherability, by the EVA of weatherability, excellent moisture resistance (ethylenevinylacetate: encapsulant 14 sealings that have light transmission.
As stated, solar battery cell 11 has crystal type and all kinds such as armorphous, but can suppress the power generation loss in the blemish zone of solar battery cell, the solar battery cell of realizing high output has received and having gazed at.This solar battery cell does not import impurity and forms substantial i type amorphous silicon layer between crystal type substrate and p type and n type amorphous silicon layer, interfacial characteristics is improved.These solar battery cells 11 ... Be connected in series by tab, from solar battery panel 10 through connecting wirings and take out line and the output that produces regulation, the structure of the output of 200W for example.
Then the structure of above-mentioned solar battery cell 11 is explained with reference to Fig. 3.Fig. 3 is the summary sectional view of the solar battery cell that uses in this execution mode of expression.In addition, in Fig. 3, for the structure of each layer of easy to understand, do not put down in writing, but represented the part of thin layer with amplifying according to ratio along actual thickness.
As shown in Figure 3, this solar battery cell 11 has the thickness of about 300 μ m as crystal N-type semiconductor N substrate, is provided with n type monocrystalline silicon substrate 110 simultaneously.On the surface of n type monocrystalline silicon substrate 110, what form not shown pyramid-shaped with several μ m～tens of μ m height is used to cover the concavo-convex of light.On this n type monocrystalline silicon substrate 110, form intrinsic i type amorphous silicon layer 112 substantially.And, on i type amorphous silicon layer 112, be formed with p type amorphous silicon layer 113.
And, on p type amorphous silicon layer 113, be formed with ITO (Indium tin Oxide tin indium oxide) film 114 by sputtering method.
In this regulation zone above ITO film 114, be formed with the collector electrode 115 of the comb shape that constitutes by silver-colored slurry.This collector electrode 115 is to be formed by bus wire portion and finger.And bus wire portion is connected with tab.
And, below n type monocrystalline silicon substrate 110, be formed with i type amorphous silicon layer 116.Below i type amorphous silicon layer 116, be formed with n type amorphous silicon substrate 117.Like this, through below n type monocrystalline silicon substrate 110, forming i type amorphous silicon layer 116 and n type amorphous silicon substrate 117 successively, form so-called BSF (Back Surface Field: structure back surface field).And then, on n type amorphous silicon substrate 117, be formed with ITO film 118 by sputtering method.
Regulation on this ITO film 118 is regional, likewise is formed with the collector electrode 119 of the comb shape that is made up of silver-colored slurry.This collector electrode 119 is formed by bus wire portion and finger.And bus wire portion is connected with tab.
In first execution mode shown in Figure 4,12 (solar battery cell between among the figure omits) solar battery cells 11 are connected in series by tab 16, constitute a unit cell (battery pack 40).In this execution mode, 8 battery pack 40 are connected in series.This solar module 1 is made up of the solar battery cell 11 of 12 row * 8 row.And, even the increase and decrease of line number is arranged, i.e. the increase and decrease of the number of solar battery cell 11 in the battery pack 40, the present invention can be suitable for equally.
The battery pack 40 of this execution mode, p type amorphous silicon layer 113 1 side direction of its solar battery cell 11 the sensitive surface side and are disposed, and adjacent solar battery cell 11, are connected by tab 16 between 11.The one distolateral collector electrode that is connected in the upper face side of solar battery cell 11 of tab 16, the collector electrode of the following side of another solar battery cell 11 of another the distolateral solar battery cell that is connected in and stipulates 11 adjacency simultaneously.Therefore, anodal collector electrode is positioned at face side, and the collector electrode of anode is positioned at rear side.
And, as stated, sensitive surface and under the situation about disposing, adopt the structure of the solar battery cell 11 that is suitable for this configuration in the p of solar battery cell 11 type amorphous silicon layer 113 1 side direction.In solar battery cell shown in Figure 3 11, under the situation of like this configuration, the thickness that determines each amorphous silicon layer obtains the conversion efficiency of the best with membranous.
Then, the connection between the battery pack in the first embodiment of the invention 40 is explained with reference to Fig. 4 and Fig. 5.Fig. 4 is an approximate three-dimensional map of representing the connection status between the battery pack 40 first execution mode of the present invention from rear side.Fig. 5 is the CD circuit description figure of the connection status between the battery pack 40 in pattern ground expression first execution mode of the present invention.
As shown in Figure 4, be connected in the connecting wiring 41,42,43,44,45 between the battery pack 40, be disposed at solar battery panel 10 rear side, be the back side of solar battery cell 11.In other words, prior art is disposed at connecting wiring around the solar battery cell, and in the present invention, the connecting wiring 41,42,43,44,45 that is connected between the battery pack 40 is disposed at solar battery cell 11 back sides.
Because connecting wiring 41 is connected in series adjacent battery pack 40,40, so be connected with the tab 16 of face side from the tab 16 of rear side.Lead-out wire one side of this connecting wiring 41 and battery pack 40,40 is used under the end by an opposite side links to each other situation.And connecting wiring 41 has the connecting portion 41a 16 that be connected with the tab of the face side of extending from the end of solar battery cell 11, that width is big.In this execution mode, the tab 16 of the cathode side at battery pack 40 back sides is adjacent the tab 16 of positive pole on battery pack 40 surface of position, is connected by connecting wiring 41.
Like Fig. 4 and shown in Figure 5, downside connects adjacent battery pack 40,40 by connecting wiring 41 in the drawings.
Connecting wiring 42,43 constitutes as lead-out wire.In this embodiment, the lead-out wire used of negative electrode uses connecting wiring 42.The lead-out wire of anodal usefulness uses connecting wiring 43.
One end of connecting wiring 42 is connected with the tab 16 of the rear side of the battery pack 40 that is positioned at end, and the other end extends to terminal box (not shown) as lead-out wire 42a.In Fig. 4 and Fig. 5, be connected in the tab 16 of solar battery cell 11 rear side of left end upper end among the figure.And, this connecting wiring 42, the part of the position beyond the battery pack that is equivalent to be positioned at left end 40 is provided with insulating barrier.This is for battery pack 40 that prevents other and the short circuit between the tab 16.Lead-out wire 42a is connected in bypass diode 50 in terminal box.
And an anodal end with connecting wiring 43 is connected with the tab 16 of the face side of the battery pack 40 that is positioned at end, and the other end extends to terminal box (not shown) as lead-out wire 43a.In Fig. 4 and Fig. 5, be connected in the tab 16 of solar battery cell 11 face side of right-hand member upper end among the figure.And the part of the position of this connecting wiring 43 beyond the battery pack that is equivalent to be positioned at right-hand member 40 is provided with insulating barrier.This is for battery pack 40 that prevents other and the short circuit between the tab 16.Lead-out wire 43a is connected in bypass diode 50 in terminal box.
Connecting wiring 44 is connected in series adjacent battery pack 40,40.And; Has the connecting portion 44b 16 that be connected with the tab of the face side of extending, that width is big from the end of solar battery cell 11; The end of solar battery cell 11 is connected with face side tab 16, on the back side of solar battery cell 11, is connected with rear side tab 16.In Fig. 4 and Fig. 5, be connected in the tab 16 of the solar battery cell 11 of upper end side among the figure.And the part of the position of this connecting wiring 44 beyond the battery pack that is equivalent to connect 40 is provided with insulating barrier.And an end 44a of this connecting wiring 44 extends to terminal box in order to be connected with bypass diode 50.
Connecting wiring 45 is connected in series adjacent battery pack 40,40.And, in Fig. 4 and Fig. 5, be connected to from the tab 16 of the extended face side in upper end of solar battery cell 11, the tab 16 of rear side.And an end 45a of this connecting wiring 45 extends to terminal box in order to be connected with bypass diode 50.
In the rear side of solar battery cell 11,, also lose light-receiving area hardly even increase the width of connecting wiring 41,42,43,44,45.Therefore, the thickness of connecting wiring 41,42,43,44,45 is reduced, simultaneously in order to reduce resistance value.Its width is increased.
In this embodiment, battery pack 40 ... Between connecting wiring 41,44,45, use width to be 10mm～35mm respectively, thickness is than the Copper Foil of 100 μ m of the thin thickness of the substrate 110 of solar battery cell 11.
In the prior art, the sectional area of employed connecting wiring is width 4mm * thickness 300 μ m around solar battery cell.Be under the situation of line of 100 μ m at used thickness,, use the above width of 12mm just enough in order to obtain and existing equal above resistance value.This connecting wiring 41 can be that the big Copper Foil of the width more than 200 times of film thickness constitutes by width.In this execution mode, owing to be the Copper Foil that has used 20mm～35mm respectively, so be favourable from the viewpoint of ohmic loss.
Terminal box is installed on back part 13 1 sides.In this execution mode, for the part mounting terminal case shown in the dotted line.One side of this terminal box is being installed, is being provided with the connecting wiring 41 between the battery pack 40, becoming to the connecting wiring 42,43 of the wiring of terminal box 30, and the connecting wiring 44,45 that is connected in bypass diode 50.This connecting wiring 42,43,44,45 also is disposed at the rear side of solar battery cell 11.And these connecting wirings 42,43,44,45 are configuration overlappingly not.
In this execution mode, connecting wiring 41 uses the Copper Foil of width 30mm, thickness 100 μ m.Connecting wiring 44 uses the Copper Foil of width 20mm, thickness 100 μ m.Connecting wiring 45 uses the Copper Foil of width 10mm, thickness 100 μ m.The connecting wiring 42,43 that becomes lead-out wiring uses the Copper Foil of width 60mm, thickness 100 μ m.Be provided with the interval more than the 2mm in order to make not short circuit between these wirings.And under the situation that is being necessary to make between connecting wiring 41,42,43,44,45 and the solar battery cell 11 insulation, insulator such as clamping EVA also can carry out stack membrane to line self to handle betwixt, covers Copper Foil by stack membrane.Here, if stack membrane has adhesion, also can carry out the temporary fixed of fixing and battery pack 40 such as insulant etc.
In this execution mode, from lead-out wire 44a, the 45a of connecting wiring 44,45, become lead-out wire 42a, the 43a from connecting wiring 42,43 of 2 lead-out wirings, back part 12 derivation from solar battery panel 10 connect in terminal box.
The lead-out wire 42a from connecting wiring 42,43, the 43a that become lead-out wiring connect cathode terminal, positive terminal respectively, the lead that other lead- out wire 43a, 44a, 45a use as bypass diode and drawing.
In this execution mode, diminish though be connected in the width of Copper Foil of taking-up part 42a, the 43a of terminal box, this part is very little, so that the recruitment of resistance also reduces to is minimum.
More than, this solar module lamination in order has: as the surface elements 12 from the light-transmitting substrate of sunray light incident side; The diaphragm seal 14 that EVA (ethylene vinyl acetate) constitutes; A plurality of solar battery cells 11 by tab 16 connections ... The battery pack 40 that constitutes connects the wiring 41,42,43,44,45 between the battery pack; Rear side diaphragm seal (EVA) 14; And it is back part 12, thereby integrated.
Then, with reference to Fig. 6 the manufacturing approach of above-mentioned solar battery panel 10 is explained.Fig. 6 is a summary construction diagram of making the manufacturing installation of solar battery panel 10.This device has downside shell 200 and the upper housing 202 that is incorporated into this downside shell airtightly.In the upper opening portion of downside shell 200, heating plate 201 is arranged with the uniform state configuration of big dignity.In the relative side of peristome of these upper housing 202 up and down side shells 200, be provided with the barrier film 203 of rubber system.At downside shell 200 circumference, remain bubble-tight sealing ring (Packing) 204 when being used to make the two to combine being equipped with in week entirely with upper housing 202.And then, on downside shell 200, be connected with not shown vacuum pump.
And; When the manufacturing of solar battery panel 10; At first; On the heating plate 201 of manufacturing installation, from the downside transparent member 12 of lamination sensitive surface one side in order, EVA sheet 14a (diaphragm seal), tab 16, a plurality of solar battery cells 11 that connect by connecting wiring 41,42,43,44 ..., EVA sheet 14b (diaphragm seal) and back part 13.
As stated, after heating plate 201 superimposed layers and component parts, downside shell 200 combines with upper housing 202.Thereafter, by not shown vacuum pump from 200 exhausts of downside shell.Be heated to about 150 ℃～200 ℃ with heating plate 201 this moment.In this state, barrier film 203 solar battery panel 10 1 thrusters of on heating plate 201, loading are pressed.And EVA sheet 14a, EVA sheet 14b gelization constitute the EVA layer of stipulating (sealant) 14.Thus, at solar battery cell 11 ... Be clamped in state lower seal between surperficial light transmission insulated substrate 12 and the rear side insulated substrate 13 in EVA layer (sealant) 14.
When this lamination procedure, in this execution mode, connecting wiring 41,42,43,44,45 is compared and can be thinned to about 1/3 with existing parts, and configuration overlappingly each other, so can suppress the generation of bubble.And, because connecting wiring 41,42,43,44,45 is thin and wide, thus the applied pressure that reduces pressure down can be reduced, and can make solar battery cell 11 disperse widely, can suppress breaking by the concentrated solar battery cell 11 that causes of stress.
If make the connecting wiring of thickness 300 μ m, width 4mm be disposed at solar battery cell (battery pack) the existing solar module shown in Figure 21 on every side and the same assembly of exporting of solar module formation of above-mentioned execution mode; Then compare with the existing example of Figure 21; Can reduce the occupied area of connecting wiring in the light-receiving area; Can improve the efficient of assembly, make the reduction of parts and lightweight become possibility.And, constituting under the situation of battery pack by 12 solar battery cells, long limit can be reduced to 12mm.From the viewpoint of component efficiency, can improve about 0.2% component efficiency.And, about weight,, can reach the lightweight of about 100g for each piece assembly.When considering, in 1000 pieces system, can reduce by 9.6 square metres area as system.
Then, according to Fig. 7～Figure 10 second execution mode of the present invention is explained.In above-mentioned first execution mode, adjacent battery pack 40,40 same polarities and constituting.In other words,, face p type amorphous silicon layer 113 and dispose whole solar battery cell 11, constitute battery pack 40 in a surperficial side.In contrast to this, in second execution mode, adjacent battery pack 40,40 reversed polarity and constituting.In other words, in second execution mode, the polarity of solar battery cell is mutual arranges differently, constitutes battery pack 40.
Fig. 7 and Fig. 8 are the summary sectional views of the solar module of expression second execution mode of the present invention, represent the battery pack that is connected by connecting wiring respectively.
In Fig. 7 and Fig. 8, the basic structure of solar battery cell 11a, 11b is with shown in Figure 3 identical.For example, solar battery cell 11a is the unit that under the situation that p type amorphous silicon layer 113 disposes towards sensitive side, uses.And solar battery cell 11b the sensitive surface side and the unit that uses under the situation about disposing in n type amorphous silicon layer 119 side direction.
In each solar battery cell 11a, 11b, under the situation of like this configuration, the thickness that determines each amorphous silicon layer obtains the conversion efficiency of the best with membranous.
Like Fig. 7 and shown in Figure 8, solar battery cell 11a and solar battery cell 11b dispose alternately, are connected with separately collector electrode by tab 16a, 16b, are connected in series thus.At this moment, in face side, rear side, respectively with negative electrode, anodal mutual reverse configuration.Therefore, as first execution mode, not that tab connects to back side lateral bending song from face side, but in face side, rear side, difference linearity ground jointing sheet 16a, 16b.
Arrange through the polarity of solar battery cell is mutual, setting battery group 40 can be shown in figure 10 differently, makes the polarity configuration on the contrary mutually of adjacent battery pack 40,40.
Like this, the reversed polarity through adjacent battery pack 40,40 ends disposes, and can utilize solar battery cell 11a, 11b whole of rear side and carries out the connection of connecting wiring 41.The result is the width that can increase connecting wiring 41, reduces resistance.
And other connecting wiring 42～45 can increase width too.
In above-mentioned first execution mode shown in Figure 4, taking-up line 42a, 43a place becoming lead-out wiring attenuate Copper Foil.Therefore, do not deny that this part has the increase of resistance.Therefore, in the 3rd execution mode shown in Figure 11, constitute with the taking-up line width partly of negative electrode, the anodal connecting wiring 42 that is connected and remain untouched, be drawn out to terminal box 30.
The 3rd execution mode shown in Figure 11, the width of connecting wiring 41 increases, and the width of the tab coupling part 44b of connecting wiring 44 broadens.Therefore, by solar battery cell 11 part of connecting wiring 41,44 and connecting wiring 42,43 is exposed a little laterally.And the above-below direction of terminal box 30 increases, and moves to upper end side to the insertion position of the lead-out wire of terminal box 30.According to such structure, can avoid the increase of resistance.And, though the parts of fine of 3 lead-out wires of central authorities, because these 3 lines do not flow through electric current when regular event, so, can not become problem even resistance is high yet.
Figure 12 is expression the 4th execution mode, the structure same with Figure 11.This execution mode shown in Figure 12 is different with the shape of terminal box 30 in the execution mode shown in Figure 11.Terminal box 30 shown in Figure 12 is compared with terminal box shown in Figure 11, and above-below direction is little, and left and right directions is big.Therefore, the insertion position of lead-out wire is positioned at the below.
Then, use Figure 13～Figure 15, the various variation of the connection status between the battery pack 40 in this execution mode are explained.Figure 13～Figure 15 is an approximate three-dimensional map of representing the connection status between the battery pack 40 from rear side.
Example shown in Figure 13 is connected in the big width connecting line 42 of negative electrode or is connected in the lower portion that anodal big width connecting line 43 is disposed at solar battery cell 11, with the jointing sheet 16 with the lead-in wire of the same width of tab.When connecting between the battery pack 40, the connecting wiring 44 that an end is connected with bypass diode disposes similarly.Upside at connecting wiring 44 is connected between the battery pack 40 in the outside by the end of solar battery cell 11, disposes the connecting wiring 45 that an end is connected with bypass diode simultaneously.
Example shown in Figure 14 is connected in the big width connecting line 42 of negative electrode or is connected in the lower portion that anodal big width connecting line 43 is disposed at solar battery cell 11.And tab 16 is connected in the outside of solar battery cell 11, and the wiring that is provided with in the position of leaving from tab 16 is connected with connecting wiring 42,43.When connecting between the battery pack 40, the connecting wiring 44 that an end is connected with bypass diode disposes similarly.
Example shown in Figure 15 is connected in the big width connecting line 42 of negative electrode or is connected in the lower portion that anodal connecting line 43 is disposed at solar battery cell 11.Tab 16 is connected in the outside of solar battery cell 11, and the wiring of configuration is connected with connecting wiring 42 between the tab 16.When connecting between the battery pack 40, the connecting line 44 that an end is connected with bypass diode disposes similarly.
Then, use Figure 16～Figure 19, the connecting wiring and the method for attachment of the solar battery cell end of the tab 16 of the usefulness that is connected in series at the back side in the execution mode of the present invention are explained.
In example shown in Figure 16, extend the two connection from connecting line 42 (43) in the end of solar battery cell 11 with the connecting line of (units in series is connected usefulness) the tab 16 same width that extend from the end of solar battery cell 11.
Example shown in Figure 17, the connecting line that covers the width of 2 tabs 16 extends from connecting wiring 42 (43), in then the two connection of the end of solar battery cell 11.
Example shown in Figure 180; For all being the connecting line of same width until end extended spot in the example shown in Figure 17 from solar battery cell 11; And this shown in Figure 180 be that only end exposed portions serve and the tab 16 from solar battery cell 11 has same width.Other is all same as shown in Figure 17.
Connecting wiring 42 (43) and 45 shown in Figure 19, by method shown in Figure 17, tab 16 is connected with connecting line 42 (43), 45.And, with the mode that two connecting lines 42 (43) and 45 do not overlap, the interval of regulation is set between the two, be disposed at the rear side of solar battery cell 11.
The present invention can be used in the home-use electricity generation system and the electricity generation system of building.
Above-mentioned execution mode only is the example of specializing for embodiment of the present invention, can not carry out determinate explanation to technical scope of the present invention thus.In other words, the present invention with the impartial scope of claim in, can implement with various forms.
Claims (8)
1. a solar module is characterized in that, is provided with:
Light-transmitting substrate;
The unit cell that constitutes by a plurality of solar battery cells that connect through tab;
Backing material;
Be electrically connected the connecting wiring of a plurality of said unit cells; With
To be sealed in the encapsulant between said light-transmitting substrate and the backing material by a plurality of said unit cell that said connecting wiring connects,
Wherein, said connecting wiring is disposed at the rear side of said solar battery cell,
Said connecting wiring uses live width to be the big tab of the width more than 200 times of thickness.
2. solar module according to claim 1 is characterized in that:
Said connecting wiring in the rear side of said solar battery cell with mutual nonoverlapping state configuration.
3. solar module according to claim 2 is characterized in that:
Said connecting wiring uses by having the metal forming that adhering stack membrane covers.
4. solar module according to claim 3 is characterized in that:
Said connecting wiring used thickness is that width is the metal forming below the above 35mm of 20mm below the above 300 μ m of 100 μ m.
5. solar module according to claim 1 is characterized in that:
For said unit cell, to close on each other oppositely and connect by tab with the polarity of the solar battery cell of one side side, the polarity of the solar battery cell of adjacent unit cell is reverse each other.
6. solar module according to claim 5 is characterized in that:
Said connecting wiring in the rear side of said solar battery cell with mutual nonoverlapping state configuration.
7. solar module according to claim 6 is characterized in that:
Said connecting wiring uses by having the metal forming that adhering stack membrane covers.
8. solar module according to claim 7 is characterized in that:
Said connecting wiring used thickness is that width is the metal forming below the above 35mm of 20mm below the above 300 μ m of 100 μ m.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006099978 | 2006-03-31 | ||
| JP2006-099978 | 2006-03-31 | ||
| JP2006099978 | 2006-03-31 | ||
| JP2007027067 | 2007-02-06 | ||
| JP2007027067A JP2007294866A (en) | 2006-03-31 | 2007-02-06 | Photovoltaic module |
| JP2007-027067 | 2007-02-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101047211A CN101047211A (en) | 2007-10-03 |
| CN101047211B true CN101047211B (en) | 2012-05-02 |
Family
ID=38771592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710091320 Active CN101047211B (en) | 2006-03-31 | 2007-03-29 | Solar battery array |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5637089B2 (en) |
| CN (1) | CN101047211B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100984136B1 (en) * | 2008-12-02 | 2010-09-28 | 에스케이씨 주식회사 | Sealing material sheet for solar battery module and solar battery module comprising the same |
| CN102598306B (en) * | 2009-11-09 | 2016-10-26 | 三菱电机株式会社 | Solar module and manufacture method thereof |
| CN102412323A (en) * | 2010-09-20 | 2012-04-11 | 亚洲太阳科技有限公司 | Low-cost improved thin-film solar cell packaging material |
| CN102437231A (en) * | 2010-09-29 | 2012-05-02 | 亚洲太阳科技有限公司 | Design criterion of improved thin film solar cell equipment with low cost |
| EP2960946B1 (en) | 2014-06-26 | 2020-11-18 | LG Electronics Inc. | Solar cell module |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218606B1 (en) * | 1998-09-24 | 2001-04-17 | Sanyo Electric Co., Ltd. | Solar cell module for preventing reverse voltage to solar cells |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574160A (en) * | 1984-09-28 | 1986-03-04 | The Standard Oil Company | Flexible, rollable photovoltaic cell module |
| JP4526223B2 (en) * | 2001-06-29 | 2010-08-18 | シャープ株式会社 | Wiring member, solar cell module and manufacturing method thereof |
| JP4817619B2 (en) * | 2004-06-30 | 2011-11-16 | 京セラ株式会社 | Solar cell module |
-
2007
- 2007-03-29 CN CN 200710091320 patent/CN101047211B/en active Active
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- 2011-07-15 JP JP2011156346A patent/JP5637089B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218606B1 (en) * | 1998-09-24 | 2001-04-17 | Sanyo Electric Co., Ltd. | Solar cell module for preventing reverse voltage to solar cells |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011205146A (en) | 2011-10-13 |
| CN101047211A (en) | 2007-10-03 |
| JP5637089B2 (en) | 2014-12-10 |
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