CN103296132A - Method for connecting solar cell plates electrically - Google Patents
Method for connecting solar cell plates electrically Download PDFInfo
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- CN103296132A CN103296132A CN201210054700XA CN201210054700A CN103296132A CN 103296132 A CN103296132 A CN 103296132A CN 201210054700X A CN201210054700X A CN 201210054700XA CN 201210054700 A CN201210054700 A CN 201210054700A CN 103296132 A CN103296132 A CN 103296132A
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- conducting resinl
- battery sheet
- conductive structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
A method for connecting solar cell plates electrically includes the following steps: providing a plurality of solar cell plates, wherein each solar cell plate is provided with a first surface and a second surface opposite to the first surface; arranging the solar cell plates in parallel to enable the first surfaces and the second surfaces opposite to the first surfaces of the solar cells to be located in two planes parallel to each other; fixing the solar cell plates placed in the parallel arrangement with a fixing structure; connecting the solar cell plates electrically with a first conductive structure coated with first conductive glue, wherein an external force is exerted on the first conductive glue to enable the first conductive glue to move in the direction far away from the surfaces of the solar cell plates until the first conductive glue is solidified. The method for connecting the solar cell plates electrically can prevent a PN junction short circuit and is suitable for a large-batch production process.
Description
Technical field
The present invention relates to area of solar cell, relate in particular to a kind of method that is electrically connected solar battery sheet.
Background technology
In recent years, because serious problems such as energy shortage and environmental pollutions, solar energy becomes one of most important scheme that addresses these problems, and along with the developing rapidly of solar cell and semiconductor industry, solar cell has been widely used in every field.
In the practical application of solar battery sheet, in order to obtain bigger input current, a plurality of solar battery sheets need be together in parallel usually, form solar module.For the efficient that improves assembly and the cost that reduces assembly, need reduce the thickness of solar battery sheet and the slit between them.But reducing of this thickness and slit because capillarity makes conducting resinl as bond wire and solar battery sheet, can enter in the slit between the solar battery sheet, thereby causes the short circuit of PN junction, and then causes the solar module can't operate as normal.Therefore, although thin solar battery sheet can be saved the material of battery and the cost of reduction solar battery sheet in large quantities, prior art does not fit into thin solar battery sheet produces little, the in parallel solar module in sheet gap in enormous quantities.
Therefore, wish to propose a kind of method of the electrical connection solar battery sheet that can address the above problem.
Summary of the invention
The purpose of this invention is to provide a kind of method that is electrically connected solar battery sheet, can effectively prevent the short circuit of solar battery sheet PN junction, and be applicable to production in enormous quantities.
According to an aspect of the present invention, provide a kind of method that is electrically connected solar battery sheet, this method may further comprise the steps:
A) provide a plurality of solar battery sheets, each solar battery sheet all have first surface and with this first surface opposing second surface;
B) these a plurality of solar battery sheets of parallel arranged, make described solar cell first surface and with this first surface opposing second surface respectively on two planes that are parallel to each other;
C) utilize fixed structure that a plurality of solar battery sheets of parallel arranged are fixed;
D) utilize first conductive structure that is enclosed with first conducting resinl that described a plurality of solar battery sheets are electrically connected, wherein, described first conducting resinl is applied external force, described first conducting resinl is moved until its curing to the direction away from the solar battery sheet surface.
According to another aspect of the present invention, also provide a kind of solar module, having comprised:
The solar battery sheet of a plurality of spaced apart and parallel arranged, wherein, described solar battery sheet have first surface and with this first surface opposing second surface, the first surface of described solar cell and with this first surface opposing second surface respectively on two planes that are parallel to each other;
At least one has wrapped up the conductive structure of conducting resinl, and described solar cell piece is electrically connected from first surface and/or second surface, it is characterized in that:
Wrap up the thickness of the part of conducting resinl on solar battery sheet of described conductive structure, be thinner than the thickness of the part at the place, slit between solar battery sheet.
Compared with prior art, the present invention has the following advantages:
(1) effectively utilizes the surface that conducting resinl is bonded at bus a plurality of solar battery sheets, realize the parallel-connection structure of a plurality of solar battery sheets, but can avoid simultaneously conducting resinl to enter in the slit between the solar battery sheet again effectively, thereby prevent the short circuit of solar battery sheet PN junction effectively;
(2) manufacturing process is simple, is applicable to the production in enormous quantities of solar module, thereby has improved production efficiency effectively.
Description of drawings
By reading the detailed description of doing with reference to the following drawings that non-limiting example is done, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the method flow diagram according to electrical connection solar battery sheet of the present invention;
Fig. 2 and Fig. 3 be respectively behind in accordance with a preferred embodiment of the present invention a plurality of solar battery sheets of arrangement schematic top plan view and along the cross-sectional schematic of hatching line AA ';
Fig. 4 carries out schematic top plan view after bonding in accordance with a preferred embodiment of the present invention the first surface with fixed structure and a plurality of solar battery sheets;
Fig. 5 is the schematic top plan view after structure shown in Figure 4 is overturn;
Fig. 6 to Fig. 8 is respectively schematic top plan view after the first surface of first conductive structure and a plurality of solar battery sheets is electrically connected in accordance with a preferred embodiment of the present invention, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Fig. 9 to Figure 11 be respectively in accordance with a preferred embodiment of the present invention to first elargol apply schematic top plan view after the external force, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
The schematic top plan view of Figure 12 to Figure 14 after structure shown in Figure 9 is overturn respectively, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Figure 15 to Figure 17 is respectively schematic top plan view after the second surface of second conductive structure and a plurality of solar battery sheets is electrically connected in accordance with a preferred embodiment of the present invention, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Figure 18 to Figure 20 be respectively in accordance with a preferred embodiment of the present invention to second elargol apply schematic top plan view after the external force, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Figure 21 to Figure 23 be behind in accordance with a preferred embodiment of the present invention the removal fixed structure schematic top plan view, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Figure 24 is in accordance with a preferred embodiment of the present invention the schematic top plan view after bus electrically connects first conductive structure and/or second conductive structure utilized;
Figure 25 is schematic top plan view after first conductive structure is reserved link position for first location structure that utilizes according to another preferred embodiment of the present invention;
Figure 26 is the schematic top plan view after structure shown in Figure 25 is overturn;
Figure 27 to Figure 29 is respectively according to the schematic top plan view after another preferred embodiment of the present invention the first surface of first conductive structure and a plurality of solar battery sheets is electrically connected, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Figure 30 to Figure 32 be respectively according to another preferred embodiment of the present invention to first elargol apply schematic top plan view after the external force, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Figure 33 to Figure 35 is respectively according to the schematic top plan view behind removal first location structure of another preferred embodiment of the present invention;
Figure 36 is schematic top plan view after second conductive structure is reserved link position for second location structure that utilizes according to another preferred embodiment of the present invention;
Figure 37 is the schematic top plan view after structure shown in Figure 36 is overturn;
Figure 38 to Figure 40 is respectively according to the schematic top plan view after another preferred embodiment of the present invention the second surface of second conductive structure and a plurality of solar battery sheets is electrically connected, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ';
Figure 41 to Figure 43 be respectively according to another preferred embodiment of the present invention to second elargol apply schematic top plan view after the external force, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB '; And
Figure 44 to Figure 46 is respectively according to the schematic top plan view behind removal second location structure of another preferred embodiment of the present invention, along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB '.
Same or analogous Reference numeral represents same or analogous parts in the accompanying drawing.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter parts and the setting to specific examples is described.Certainly, they only are example, and purpose does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself not indicate the relation between the various embodiment that discuss of institute and/or the setting.In addition, various specific technology and the examples of material that the invention provides, but those of ordinary skills can recognize the property of can be applicable to of other technologies and/or the use of other materials.In addition, first feature described below second feature it " on " structure can comprise that first and second features form the embodiment of direct contact, can comprise that also additional features is formed on the embodiment between first and second features, such first and second features may not be direct contacts.Should be noted that illustrated parts are not necessarily drawn in proportion in the accompanying drawings.The present invention has omitted description to known assemblies and treatment technology and technology to avoid unnecessarily limiting the present invention.
According to an aspect of the present invention, provide a kind of method that is electrically connected solar battery sheet.Please refer to Fig. 1, Fig. 1 is the method flow diagram according to electrical connection solar battery sheet of the present invention.Below, will be specifically described the manufacture method shown in Fig. 1 in conjunction with Fig. 2 to Figure 21.
Execution in step S101 provides a plurality of solar battery sheets, each solar battery sheet all have first surface 100a and with this first surface 100a opposing second surface 100b.
The material of described solar battery sheet can be a kind of or its combination in any in single crystalline Si, monocrystalline Ge, single crystalline Si Ge, polycrystalline Si, polycrystalline Ge, polycrystal SiGe, amorphous Si, amorphous Ge, amorphous SiGe, III-V or the II-VI compound semiconductor.
In the present embodiment, described solar battery sheet is shaped as strip.It should be appreciated by those skilled in the art that according to actual design and needs, described solar battery sheet can also be other shapes, for example sheet, arc etc., the present invention does not do any restriction to this.
For example, as shown in Figures 2 and 3, described solar battery sheet can comprise n type semiconductor layer and p type semiconductor layer respectively at first surface 100a and second surface 100b, and the juncture area of this n type semiconductor layer and p type semiconductor layer constitutes PN junction.Certainly, enforcement of the present invention is not limited thereto.
Preferably, there is insulation side wall (not shown) in the side on described solar cell length of a film limit, and the material of described insulation side wall comprises materials such as silicon dioxide, silicon nitride or aluminium oxide.
Preferably, on the first surface 100a of described solar battery sheet and second surface 100b, also has the insulating barrier (not shown).
Below, will electrically connect as example with the first surface 100a to solar battery sheet, method provided by the present invention is described.
Execution in step S102, these a plurality of solar battery sheets of parallel arranged, make described solar cell first surface 100a and with this first surface 100a opposing second surface 100b respectively on two planes that are parallel to each other.
For the ease of the parallel connection of follow-up realization solar battery sheet, need should place by a plurality of solar battery sheets in same mode, that is, and make all solar battery sheets n type semiconductor layer the surface up, and the surface that makes p type semiconductor layer is down, vice versa.In the present embodiment, as shown in Figures 2 and 3, its first surface of the solar battery sheet 100a after parallel arranged is placed up, and second surface 100b is down.
All can there be certain slit between each solar battery sheet after the parallel arranged and the solar battery sheet that is adjacent, the size in these slits can equate, be equidistant arranged solar battery sheet, the size in these slits can not wait yet, i.e. non-equidistant arranged solar battery sheet.
Then, execution in step S103 utilizes fixed structure that a plurality of solar battery sheets of parallel arranged are fixed.
Particularly, as shown in Figure 4, from the second surface 100b of described solar battery sheet, utilize a plurality of solar battery sheets of 200 pairs of parallel arranged of fixed structure to fix, be convenient to follow-up a plurality of solar battery sheets be carried out parallel operation.Certainly, also can fix from the first surface 100a of solar cell, this present invention is not done any restriction.In the present embodiment, as shown in the figure, described fixed structure 200 is adhesive tape, for example UV adhesive tape, PI adhesive tape or Kapton Tape etc.As long as play the purpose that solar battery sheet is fixing, the quantity of adhesive tape can be one, also can be many.Describe to utilize two ends of two adhesive tapes on the solar battery sheet length direction that it is fixed as example in the present embodiment.Need to prove that if in the first surface 100a and second surface 100b of solar cell, it is light face into that a surface is arranged, and another surface is shady face, then preferably utilizes 200 pairs of solar battery sheets of fixed structure to fix from shady face.
As shown in Figure 5, the solar battery sheet of the parallel arranged after fixing is overturn, make solar battery sheet first surface 100a down, second surface 100b up, and the solar battery sheet after will overturning suspends.Wherein, can use the external device (ED) (not shown) from the solar battery sheet both sides it to be set up, make the zone line of first surface 100a unsettled, this zone line is used in follow-up step and first conductive structure electrically connects.
Thereafter, execution in step S104 utilizes first conductive structure that is enclosed with first conducting resinl that described a plurality of solar battery sheets are electrically connected, wherein, described first conducting resinl is applied external force, described first conducting resinl is moved until its curing to the direction away from the solar battery sheet surface.
For example, as Fig. 6, Fig. 7 and (Fig. 7 and Fig. 8 are respectively Fig. 6 along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ') shown in Figure 8, first conductive structure 300 of first conducting resinl 310 will be enclosed with, bind to the first surface 100a of a plurality of described solar battery sheets of parallel arranged, should couple together by first surface 100a by a plurality of described solar battery sheets.In the present embodiment, described first conducting resinl 310 is elargol, and in other embodiments, described first conducting resinl 310 can also be enumerated at this no longer one by one for other metal-to-metal adhesives that is fit to.Described first conductive structure 300 is preferably one or more metal wires (among the figure be that example illustrate with two wires), the for example copper cash of copper cash, silver-colored line, aluminum steel, parcel TiN film or other electric conducting materials etc., the diameter range of this metal wire is about 20 microns-200 microns.Need to prove, after using first conducting resinl 310 with first conductive structure, 300 parcels, first conducting resinl 310 that is positioned at first conductive structure, 300 surfaces tends to exist situation pockety, in this case, can utilize the mode of for example wind to make first conducting resinl 310 be attached to the surface of first conductive structure 300 equably earlier, and then and the first surface 100a of solar battery sheet bind.
For example, first conductive structure that is enclosed with first conducting resinl is applied power upwards, for example upwards draw, simultaneously by using wind or air-flow to apply downward power to solar battery sheet and adhesive tape.At this moment, downward wind or air-flow apply downward external force to first conducting resinl 310 between solar battery sheet, then can make described first conducting resinl 310 to away from the direction on solar battery sheet surface (for example, be downward direction in this case) flow, thereby can suppress effectively to a certain extent because first conducting resinl 310 that causes of capillarity enters in the slit between the solar cell, and then move to another surface of solar battery sheet.Thereby prevented the appearance of the PN junction short circuit between two surfaces of solar battery sheet effectively.
In the present embodiment, shown in the direction of arrow among Fig. 7 and Fig. 8, utilize air-flow to apply external force to first conducting resinl 310.In other embodiments, also can enumerate no longer one by one at this by other means.Because blocking of solar battery sheet, first conducting resinl 310 that is positioned at the solar battery sheet below only flows downward under the effect of body gravity slightly.And between solar battery sheet first conducting resinl 310 in the slit owing to there be not blocking of solar battery sheet, flow downward (mainly being under the effect at air-flow) under the effect of gravity and air-flow, namely flow to the direction away from solar battery sheet.By the control to current rate, can make first conducting resinl 310 a small amount of even can't enter in the slit between the solar battery sheet.In addition, by the control to gas flow temperature and action time, first conducting resinl 310 is solidified gradually in process of flowing.In other embodiments, also can by applying air-flow first conducting resinl 310 be flowed downward earlier, and then 310 heating be cured to first conducting resinl.
Need to prove, when the side on solar cell length of a film limit has insulation side wall the time, can avoid effectively conducting resinl (for example first conducting resinl 310) at the edge of solar battery sheet with the PN junction short circuit.When on the first surface 100a of solar battery sheet and second surface 100b, also having insulating barrier, can more effectively avoid short circuit.
Please refer to Fig. 9 to Figure 11, wherein, Fig. 9 is the schematic top plan view that first conducting resinl 310 solidifies the solar battery sheet of a plurality of parallel arranged in back, and Figure 10 and Figure 11 are respectively structure shown in Figure 9 along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB '.Mainly do not concentrate on outside the slit of solar battery sheet after first conducting resinl 310 that is blocked by solar battery sheet solidifies.
Afterwards, alternatively, in the side of the second surface 100b that is positioned at described a plurality of solar battery sheets, utilize the 400 pairs of described a plurality of solar battery sheets of second conductive structure that are enclosed with second conducting resinl 410 to electrically connect.
Particularly, after the first surface 100a with solar battery sheet electrically connects, can adopt in the same way, utilize the second surface 100b of 400 pairs of solar battery sheets of second conductive structure to electrically connect.For example, at first, as Figure 12, Figure 13 and shown in Figure 14, a plurality of solar battery sheets are turned, make solar battery sheet second surface 100b down, first surface 100a up, and the solar battery sheet after will overturning utilizes the external device (ED) (not shown) to suspend, and makes the zone line of its second surface 100b unsettled, and this zone line is used in follow-up step and second conductive structure electrically connects.At this moment, first conducting resinl 310 after the curing is positioned at the top of solar battery sheet first surface 100a.
Then, as Figure 15, Figure 16 and (Figure 16 and Figure 17 are respectively Figure 15 along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB ') shown in Figure 17, second conductive structure 400 of second conducting resinl 410 will be enclosed with, bind to the second surface 100b of a plurality of described solar battery sheets of parallel arranged, should couple together by second surface 100b by a plurality of described solar battery sheets, to realize the parallel connection of a plurality of solar battery sheets, wherein, described second conductive structure 400 needs and stagger in the position of described first conductive structure 300, in case short circuit.In the present embodiment, the material of described second conducting resinl 410 is identical with the material of first conducting resinl 310, is elargol, and in other embodiments, the material of described second conducting resinl 410 also can be different from the material of first conducting resinl 310.The material of described second conductive structure 400 can be identical with the material of described first conductive structure 300, also can be different, wherein, described second conductive structure 400 is preferably one or more metal wires or conductor wire (among the figure be that example illustrate with two wires), and the diameter range of this metal wire or conductor wire is about 20 microns-200 microns.Need to prove, after using second conducting resinl 410 with second conductive structure, 400 parcels, also can there be situation pockety in second conducting resinl 410 that is positioned at second conductive structure, 400 surfaces, in this case, can adopt and make second conducting resinl 410 be attached to the surface of second conductive structure 400 equably in the same way, and then and the second surface 100b of solar battery sheet bind.
In the process of binding, described second conducting resinl 410 is applied external force, described second conducting resinl 410 is flowed until its curing to the direction away from solar battery sheet second surface 100b.
Particularly, in the present embodiment, shown in the direction of arrow among Figure 16 and Figure 17, utilize air-flow to apply external force to second conducting resinl 410.In other embodiments, also can enumerate no longer one by one at this by other means.Because blocking of solar cell, second conducting resinl 410 that is positioned at the solar battery sheet below only flows downward under the effect of body gravity slightly.And between solar battery sheet second conducting resinl 410 in the slit, owing to there be not blocking of solar cell, flow downward (mainly being under the effect at air-flow) under the effect of gravity and air-flow, namely flow to the direction away from solar battery sheet, even come off from second conductive structure 400.By the control to current rate, can make second conducting resinl 410 a small amount of even can't enter in the slit between the solar battery sheet.In addition, can second conducting resinl 410 be solidified gradually in process of flowing by the control to gas flow temperature and action time, also can by applying air-flow second conducting resinl 410 be flowed downward earlier, and then 410 heating be cured to second conducting resinl.Need to prove, in the process that second conducting resinl 410 is cured, owing to first conducting resinl 310 has cured, so can not be subjected to the influence that second conducting resinl 410 solidifies.
Equally, when the side on solar cell length of a film limit has insulation side wall the time, can avoid effectively conducting resinl (for example second conducting resinl 410) at the edge of solar battery sheet with the PN junction short circuit.When on the first surface 100a of solar battery sheet and second surface 100b, also having insulating barrier, can more effectively avoid short circuit.
Please refer to Figure 18 to Figure 20, wherein, Figure 18 is the schematic top plan view that second conducting resinl 410 solidifies the solar battery sheet of a plurality of parallel arranged in back, and Figure 19 and Figure 20 are respectively structure shown in Figure 180 along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB '.Mainly do not concentrate on outside the slit of solar battery sheet after second conducting resinl 410 that is blocked by solar battery sheet solidifies.
After the parallel connection that realizes a plurality of solar battery sheets, as shown in figure 21, remove described fixed structure 200.Wherein, if described fixed structure 200 is the UV adhesive tape, then can remove by the ultraviolet ray irradiation, if described fixed structure 200 is PI adhesive tape or Kapton Tape, then can remove by developing solution dissolution, for the fixed structure 200 of other materials, in this explanation no longer one by one.Need illustrate, if described fixed structure 200 is positioned at the shady face of solar battery sheet, perhaps described fixed structure 200 has light transmission, so also can not remove described fixed structure 200, in subsequent step, solar battery sheet after the parallel connection is encapsulated together with described fixed structure 200, form solar module.
Preferably, when first conductive structure 300 is many wires, owing to have certain distance between the metal wire, so have higher contact resistance between first conductive structure 300 and the solar battery sheet, therefore, in order further to reduce the contact resistance between first conductive structure 300 and the solar battery sheet, as shown in figure 24, first surface 100a at least one described solar battery sheet, utilize bus 500 to electrically connect as many wires of first conductive structure 300, that is, bus 500 is laterally printed to the first surface 100a of solar battery sheet, thereby metal wire electrically connects longitudinally.When second conductive structure 400 is many wires, can adopt in the same way, second surface 100b at least one described solar battery sheet, utilize bus 500 to electrically connect as many wires of second conductive structure 400, thereby reduce the contact resistance between second conductive structure 400 and the solar battery sheet.The schematic diagram of printing conductive bar 500 on the first surface 100a of solar battery sheet has been shown among Figure 24, and for brevity, the schematic diagram of printing conductive bar 500 no longer provides at this on the second surface 100b of solar battery sheet.
Preferably, the conducting resinl that can utilize location structure further to prevent from being wrapped in conductive structure surfaces enters in the slit between the solar battery sheet, please refer to Figure 25 to Figure 46.
Particularly, as Figure 25 and shown in Figure 26, after using fixed structure 200 by second surface 100b a plurality of parallel solar battery sheets to be fixed, utilize first location structure to reserve the link position of first conductive structure 300 at the first surface 100a of described a plurality of solar cells.In the present embodiment, described first location structure is first positioning belt 210 more than two or two, and wherein, this first positioning belt 210 includes but not limited to UV adhesive tape and PI adhesive tape.It is one group with two described first positioning belts 210, with one group or organize the first surface 100a that described first locating adhesive tape is attached to described a plurality of solar cells more, have certain clearance between two first positioning belts 210 in every group, this gap is the link position of first conductive structure 300 that reserves.Wherein, the width in described gap (representing with L among the figure) is less than the width (if described first conductive structure 300 is metal wire, then the width in described gap is less than the diameter of the metal wire that has wrapped up first conducting resinl 310) of first conductive structure 300 that has wrapped up first conducting resinl 310.Need to prove that those skilled in the art is to be understood that first location structure should not only limit to this, any structure that can be used for restriction first conductive structure 300 positions all is applicable to the present invention.
Then, as shown in figure 26, the solar battery sheet that posts first positioning belt 210 is overturn, make solar battery sheet first surface 100a down, second surface 100b up, and the solar battery sheet horizontal suspended after will overturning.
Then, extremely shown in Figure 29 as Figure 27, first conductive structure 300 that is enclosed with first conducting resinl 310 is bonded to the described link position of reservation, in the bonding process above described solar cell second surface 100b, apply air-flow (shown in the direction of arrow among Figure 28 and Figure 29) to described first conducting resinl 310, described first conducting resinl 310 between solar battery sheet is flowed downward until curing, extremely shown in Figure 32 as Figure 30.At bonding first conductive structure 300 and solidify in the process of first conducting resinl 310, because there is first positioning belt 210 in first conductive structure, 300 both sides, and the gap between this first positioning belt 210 is again less than the width of first conductive structure 300 that is enclosed with first conducting resinl 310, so, part first conducting resinl 310 is blocked in the outside of first positioning belt 210, can't enter in the slit of solar battery sheet, thereby reduce the appearance of solar battery sheet PN junction short circuit phenomenon further.After first conducting resinl 310 solidifies, to shown in Figure 35, remove described first positioning belt 210 as Figure 33.
Then, second surface 100b for solar cell carries out identical processing, namely, as shown in figure 36, utilize second location structure 220 to reserve the link position of second conductive structure 400 at the second surface 100b of described a plurality of solar cells, in the present embodiment, described second location structure 220 is at least two second positioning belts 220, this second positioning belt 220 includes but not limited to UV adhesive tape and PI adhesive tape, wherein, have the gap between described second positioning belt 220, this gap is the link position of second conductive structure 400 that reserves, and the width in this gap is less than the width of described second conductive structure 400 that has wrapped up second conducting resinl 410; Then, as shown in figure 37, the solar battery sheet that posts second positioning belt 220 is overturn, make solar battery sheet second surface 100b down, first surface 100a up, and the solar battery sheet horizontal suspended after will overturning; Extremely shown in Figure 40 as Figure 38, second conductive structure 400 that is enclosed with second conducting resinl 410 is bonded to the described link position of reservation, and from the top of described solar cell first surface 100a, apply air-flow (shown in the direction of arrow among Figure 38 and Figure 39) to described second conducting resinl 410, described second conducting resinl 410 between solar battery sheet is flowed downward until curing, extremely shown in Figure 43 as Figure 41; At last, to shown in Figure 46, remove described second positioning belt 220 as Figure 44.Because the existence of second positioning belt 220, part second conducting resinl 410 is blocked in the outside of second positioning belt 220, can't enter in the slit of solar battery sheet, thereby reduce the appearance of solar battery sheet PN junction short circuit phenomenon further.
After having carried out above-mentioned steps, effectively utilize the surface that conducting resinl is bonded at bus a plurality of solar battery sheets, realize the parallel-connection structure of a plurality of solar battery sheets, but can avoid simultaneously conducting resinl to enter in the slit between the solar battery sheet again effectively, thereby prevent the short circuit of solar battery sheet PN junction effectively; In addition, manufacturing approach craft provided by the present invention is simple, is applicable to the production in enormous quantities of solar module, can improve production efficiency effectively.
According to another aspect of the present invention, also provide a kind of solar module according to above-mentioned manufacture method made.Please refer to Figure 21, Figure 22 and shown in Figure 23, wherein, Figure 22 and Figure 23 are respectively structure shown in Figure 21 along the cross-sectional schematic of hatching line AA ' and along the cross-sectional schematic of hatching line BB '.Described solar module comprises the solar battery sheet of a plurality of parallel arranged, wherein, the material of described solar battery sheet can be in single crystalline Si, monocrystalline Ge, single crystalline Si Ge, polycrystalline Si, polycrystalline Ge, polycrystal SiGe, amorphous Si, amorphous Ge, amorphous SiGe, III-V or the II-VI compound semiconductor a kind of or its combination in any wherein.Described solar cell have first surface 100a and with this first surface 100a opposing second surface 100b, wherein, first surface 100a and the second surface 100b of described solar battery sheet lay respectively at same plane.The shape of described solar battery sheet can be strip, can also be for example other shapes such as sheet, arcuation.In described solar module, all can there be certain slit between each solar battery sheet and the solar battery sheet that is adjacent, the size in these slits can equate, also can not wait.Preferably, there is insulation side wall (not shown) in the side on described solar cell length of a film limit, and the material of described insulation side wall comprises materials such as silicon dioxide, silicon nitride or aluminium oxide.Further preferably, on the first surface 100a of described solar battery sheet and second surface 100b, also has the insulating barrier (not shown).
There are first conductive structure 300 and/or second conductive structure 400, the solar battery sheet of these a plurality of parallel arranged is electrically connected from first surface 100a and/or second surface 100b, wherein, exist on the surface of first conductive structure 300 as binder and first conducting resinl 310 that solidified, and/or exist on the surface of second conductive structure 400 as binder and second conducting resinl 410 that solidified.In the present embodiment, described first conductive structure 300 and/or second conductive structure 400 are one or more metal wires, for example the copper cash of copper cash, silver-colored line, aluminum steel, parcel TiN film or other electric conducting materials etc.Described first conducting resinl 310 and/or second conducting resinl 410 are preferably elargol.Because have certain slit between the solar battery sheet, so the partially conductive structure is positioned on the slit of solar battery sheet, and other partially conductive structures are positioned on the solar battery sheet surface.Wherein, adopted method provided by the present invention after, wrap up the thickness of the part of conducting resinl on solar battery sheet of described conductive structure, will be thinner than the thickness of part at place, slit between solar battery sheet.This be since in solidification process the part at the slit place of conducting resinl between solar battery sheet of the described conductive structure of parcel be subjected to external force that it is moved to the direction away from the solar battery sheet surface; And the part of conducting resinl on solar battery sheet of wrapping up described conductive structure do not have because of stopping of solar battery sheet or less this external force that is subjected to.
Preferably, as shown in figure 24, there are bus 500 in first surface 100a and/or second surface 100b at one or more described solar battery sheet, wherein, the bus that is positioned at first surface 100a electrically connects described first conductive structure 300, and the bus that is positioned at second surface 100b electrically connects described second conductive structure 400, reduces contact resistance between conductive structure and the solar battery sheet with this.
Compare with traditional solar module, solar module provided by the present invention has following advantage:
(1) there is minute quantity or do not have conducting resinl fully in the slit between solar battery sheet, so solar module provided by the present invention is difficult for being short-circuited in use;
(2) solar module provided by the present invention is easy to produce.
Though describe in detail about example embodiment and advantage thereof, be to be understood that under the situation of the protection range that does not break away from the restriction of spirit of the present invention and claims, can carry out various variations, substitutions and modifications to these embodiment.For other examples, when those of ordinary skill in the art should understand easily in keeping protection range of the present invention, the order of processing step can change.
In addition, range of application of the present invention is not limited to technology, mechanism, manufacturing, material composition, means, method and the step of the specific embodiment of describing in the specification.From disclosure of the present invention, to easily understand as those of ordinary skill in the art, for the technology, mechanism, manufacturing, material composition, means, method or the step that have existed or be about to later on develop at present, wherein they are carried out the corresponding embodiment cardinal principle identical functions of describing with the present invention or obtain identical substantially result, can use them according to the present invention.Therefore, claims of the present invention are intended to these technology, mechanism, manufacturing, material composition, means, method or step are included in its protection range.
Claims (19)
1. method that is electrically connected solar battery sheet comprises:
A) provide a plurality of solar battery sheets, each solar battery sheet all have first surface (100a) and with this first surface (100a) opposing second surface (100b);
B) these a plurality of solar battery sheets of parallel arranged, make described solar cell first surface (100a) and with this first surface (100a) opposing second surface (100b) respectively on two planes that are parallel to each other;
C) utilize fixed structure that a plurality of solar battery sheets of parallel arranged are fixed;
D) utilize first conductive structure (300) that is enclosed with first conducting resinl (310) that described a plurality of solar battery sheets are electrically connected, wherein, described first conducting resinl (310) is applied external force, described first conducting resinl (310) is moved until its curing to the direction away from the solar battery sheet surface.
2. method according to claim 1, wherein, the side of described solar battery sheet has the insulation side wall.
3. method according to claim 1 and 2, wherein, the first surface of described solar battery sheet (100a) and second surface (100b) have insulating barrier.
4. method according to claim 1 and 2 wherein, also comprises after described step d):
E) utilize second conductive structure (400) that is enclosed with second conducting resinl (410) from an other side described a plurality of solar battery sheets to be electrically connected, wherein, described second conducting resinl (410) is applied external force, described second conducting resinl (410) is moved until its curing to the direction away from the solar battery sheet surface.
5. method according to claim 1 and 2, wherein, described fixed structure (200) is one or more adhesive tapes.
6. method according to claim 1 and 2, wherein, utilize first conductive structure that is enclosed with first conducting resinl that the step that described a plurality of solar battery sheets electrically connect is comprised:
At least two first positioning belts (210) are sticked on the first surface (100a) of described a plurality of solar cells, there is the gap between described first positioning belt (210), this gap is the link position of first conductive structure (300) that reserves, wherein, the width in this gap is less than the width of first conductive structure (300) that has wrapped up first conducting resinl (310);
First conductive structure (300) that will be enclosed with first conducting resinl (310) is bonded to the described link position of reservation.
7. method according to claim 6, wherein, described first positioning belt (210) is a kind of or its combination in any in UV adhesive tape, the PI adhesive tape.
8. method according to claim 6 wherein, applies external force to described first conducting resinl, described first conducting resinl is moved until its step of curing to the direction away from the solar battery sheet surface comprise:
The described a plurality of solar battery sheets of horizontal positioned, and make described first conductive structure (300) that is enclosed with first conducting resinl (310) unsettled, wherein, the first surface of described solar battery sheet (100a) is down;
From the top of described solar cell second surface (100b), apply air-flow to described second conducting resinl (310), described second conducting resinl (310) is flowed downward until curing.
9. method according to claim 6, wherein, second conductive structure that is enclosed with second conducting resinl in utilization comprises the step that described a plurality of solar battery sheets electrically connect from an other side:
At least two second positioning belts (220) are sticked on the second surface (100b) of described a plurality of solar cells, there is the gap between described second positioning belt (220), this gap is the link position of second conductive structure (400) that reserves, wherein, the width in this gap is less than the width of second conductive structure (400) that has wrapped up second conducting resinl (410);
Second conductive structure (400) that will be enclosed with second conducting resinl (410) is bonded to the described link position of reservation.
10. method according to claim 7, wherein, described second positioning belt (220) is a kind of or its combination in any in UV adhesive tape, the PI adhesive tape.
11. method according to claim 8 wherein, applies external force to described second conducting resinl, described second conducting resinl is moved until its step of curing to the direction away from the solar battery sheet surface comprise:
The described a plurality of solar battery sheets of horizontal positioned, and make described second conductive structure (400) that is enclosed with second conducting resinl (410) unsettled, wherein, the second surface of described solar battery sheet (100b) is down;
From the top of described solar cell first surface (100a), apply air-flow to described second conducting resinl (410), described second conducting resinl (410) is flowed downward until curing.
12. method according to claim 4 wherein, also comprises after described step e):
F) remove described fixed structure (200).
13. method according to claim 4 wherein, also comprises after described step e):
G) on the first surface (100a) and/or second surface (100b) of at least one described solar battery sheet, utilize bus (500) that described first conductive structure (300) and/or second conductive structure (400) are electrically connected.
14. method according to claim 1 and 2, wherein, described solar battery sheet be shaped as strip, sheet or arcuation.
15. a solar module comprises:
The solar battery sheet of a plurality of spaced apart and parallel arranged, wherein, described solar battery sheet have first surface (100a) and with this first surface (100a) opposing second surface (100b), the first surface of described solar cell (100a) and with this first surface (100a) opposing second surface (100b) respectively on two planes that are parallel to each other;
At least one has wrapped up the conductive structure of conducting resinl, and described solar cell piece is electrically connected from first surface (100a) and/or second surface (100b), it is characterized in that:
Wrap up the thickness of the part of conducting resinl on solar battery sheet of described conductive structure, be thinner than the thickness of the part at the place, slit between solar battery sheet.
16. solar module according to claim 15, wherein, the side of described solar battery sheet has the insulation side wall.
17. according to claim 15 or 16 described methods, wherein, the first surface of described solar battery sheet (100a) and second surface (100b) have insulating barrier.
18. according to claim 15 or 16 described solar modules, wherein, described solar battery sheet be shaped as strip, sheet or arcuation.
19. according to claim 15 or 16 described solar modules, wherein:
There are bus (500) in first surface (100a) and/or second surface (100b) at one or more described solar battery sheet, electrically connect at least one conductive structure.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109742191A (en) * | 2019-01-14 | 2019-05-10 | 浙江晶科能源有限公司 | A kind of production method and solar battery sintering equipment of solar battery |
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