WO2013091725A1 - A conductor spool, a method for manufacturing a solar cell and a solar cell - Google Patents

A conductor spool, a method for manufacturing a solar cell and a solar cell Download PDF

Info

Publication number
WO2013091725A1
WO2013091725A1 PCT/EP2011/073953 EP2011073953W WO2013091725A1 WO 2013091725 A1 WO2013091725 A1 WO 2013091725A1 EP 2011073953 W EP2011073953 W EP 2011073953W WO 2013091725 A1 WO2013091725 A1 WO 2013091725A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
members
spool
pair
conductor member
Prior art date
Application number
PCT/EP2011/073953
Other languages
French (fr)
Inventor
Tag Hammam
Original Assignee
Aurubis Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aurubis Ag filed Critical Aurubis Ag
Priority to PCT/EP2011/073953 priority Critical patent/WO2013091725A1/en
Publication of WO2013091725A1 publication Critical patent/WO2013091725A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1876—Particular processes or apparatus for batch treatment of the devices
    • H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • a CONDUCTOR SPOOL A METHOD FOR MAN UFACTUR- ING A SOLAR CELL AND A SOLAR CELL
  • the present invention relates to a conductor spool used for manufacturing a solar cell that comprises a plurality of conductor members and a pair of receptor members.
  • the spool comprises a body comprising a cylindrical envelope surface and a conductor arrangement comprising a first flexible elongated conductor member wound on the envelope surface.
  • the first conductor member comprises a first free end that extends away from the envelope surface and is adapted to be fed from the envelope surface to the pair of receptor members.
  • the invention further relates to a method for manufacturing a solar cell , and a solar cell manufactured using the method .
  • the solar cell comprises the pair of receptor members comprising a semi-conducting material , usually in the form of a pair of silicon wafers.
  • Each receptor member of the pair of receptor members are connected by the plurality of conductor members by means of attaching each conductor member by soldering so that it extends between the receptor members.
  • the conductor members are adapted to extend between a voltage differences within the pair of receptor members.
  • the solar cell When the solar cell is subjected to sunshine electrons are emitted from the receptor members and collected by the conductor members.
  • a plurality of solar cell are often connected serially to an array of solar cells.
  • the array of solar cells comprises typically 60 solar cells or more.
  • the solar cell is manufactured by means of providing each of the plurality of conductor member from a separate conductor spool to the pair of receptor members and attach ing the conductor members to the pair of receptor members.
  • a problem during manufacturing the solar cell is that the conductor spools run out of conductor members at different occasions. Thereby, the pro- duction must be interrupted and the empty conductor spool replaced with a full conductor spool .
  • Such interruption in the manufacturing process of solar cells reduces the yield of the manufacturing process of solar cells and increases the risk of manufacturing defects, such as insufficient alignment of the conductor members, insufficient attachment of the conductor members to the pair of receptor members, etcetera.
  • the efficiency of the solar cell is improved when the number of conductor members increase because a higher degree of the emitted electrons are collected by the conductor members before the emitted electrons fall back into the semi- conducting material of the receptor members.
  • the manufacturing cost of the solar cell increases due to the increased number of interruptions in the manufacturing process when providing the conductor members from the conductor spools to the receptor members and increased number of solar cells that must be corrected or scraped .
  • Each solar cell further comprises a plurality of printed conductors that extends perpend icular between two parallel conductor members.
  • the printed conductors comprises mainly silver that provides high electrical conductivity.
  • the printed con- ductors are printed on the surface of the solar cells with a density that provides an acceptable efficiency.
  • Th is allows the material for the printed conductors to be reduced , which may resu lt in a significant reduction in the manufacturing cost, in particular when using silver printed conductors.
  • a further problem when manufacturing solar cell is to obtain a sufficient attachment of the conductor members to the receptor members when soldering the conductor members to the receptor members because of difference in thermal expansion between the material of the receptor members and the conductor mem- bers.
  • Each conductor member comprises a core, such as made of copper or a copper alloy, and a solder material coated on the core. After that the conductor members have been arranged on the receptor members, the conductor members and receptor members are heated until the solder material melts and thereafter the conductor members and receptor members are cooled down so that the solder coatings solid ify and attachments are formed .
  • the conductor members are sufficiently soft so that the difference in thermal expansion can be accommodated by plastic yield of the conductor members. I n order to reduce the number of defect attachments of the conductor members to the pair of receptor members and thus reducing the number of solar cells that must be corrected or scraped , it is desired to maintain the softness of the conductor members.
  • US 5,735,967 discloses a wiring apparatus comprising a first and a second bobbin mounted on a common bobbin shaft.
  • Each of the bobbins comprises a wire wound on its cylindrical surface.
  • a terminal end of the wire on the first bobbin is connected to an initial end of the wire on the second bobbin , whereupon the connected wire on the bobbins is unwound .
  • the arrangement allows the first bobbin to be replaced before the wire on the second bobbin has fully been unwound .
  • the object of the present invention is to provide an improved conductor spool and method for manufacturing a solar cell and a solar cell manufactured by the method .
  • a first object of the invention is to provide a conductor spool and a method that reduces the occurrence of interruption in the manufacturing proc- ess in comparison to prior art.
  • a second object of the invention is to provide a conductor spool and a method that reduces the number of defects in the attachment between the conductor members and the receptor members in comparison to prior art.
  • a third object of the invention is to provide a conductor spool that enables conductors with higher impurity levels to be used in the manufacturing of solar cells.
  • the first and the second objects are obtained by a conductor spool according to the preamble of claim 1 , which conductor spool is characterized in that the conductor arrangement comprises at least one second flexible elongated conductor member wound on the envelope surface, the second conductor member comprises a second free end that extends away from the envelope surface and which second free end is adapted to be fed from the envelope surface to the pair of receptor members si- multaneously with the first free end of the first conductor member.
  • the first conductor member and the at least one second conduc- tor member are wound on the envelope surface of the body of the conductor spool so that the first free end and the second free end extend away from the envelope surface.
  • the first conductor member and the at least one second conductor member are wound on the envelope surface so to enable the first con- ductor member and the at least one second conductor member to be unwound simu ltaneously from the envelope surface of the conductor spool and thereby allow the first free end and the second free end to be fed simultaneously to the pair of receptor members.
  • the manufacturing process is thereby simplified in that the manufacturing process requires only handling of a single conductor spool.
  • the conductor spool enables the first conductor member and the at least one second conductor mem- ber to be completely unwound at the same time and therefore requiring on ly exchange of a sing le empty conduct spool with a fu ll conductor spool in comparison with multiple exchange of conductor spools at separate occasions as in prior art.
  • the conductor spool facilitates the manufacturing of solar cells, in particular when the solar cells are to be provided with a large number of conductor members, which solar cells thereby obtains a high efficiency in comparison to prior art solar cells.
  • the first conductor member and the at least one second conduc- tor member are flexible in that they are adapted to be fed to the pair of receptor members and arranged on the receptor members. Such feed ing and arrangement may involve a portion of plastic deformation of the conductor members that preferably should be kept at low levels.
  • the pair of receptor comprises a semi-conducting material , such as a pair of silicon wafers.
  • the first conductor member and the at least one second conductor member of the conductor arrangement constitutes separate members. The separate members are adapted after being fed to the pair of receptor members so that they extend over different parts of the pair of receptor members.
  • the conductor members are arranged so that the first conductor member and the at least one second conductor member extends parallel with each other on the pair of receptor members.
  • the first conductor member is wound on the envelope surface with a first length and the at least one second conductor member is wound on the envelope surface with a second length , wherein the first and the second length are the same or essentially the same.
  • a certain rotation of the spool results in unwinding of a first part of the conductor member and a second part of the at least one second conductor member, wherein the first and the second part have the same length or essentially the same length.
  • the same length of the first and the second conductor member are necessary for connecting the pair of receptor members.
  • the first conduc- tor member and the at least one second conductor member are arranged wound next to each other on the envelope surface.
  • the conductor arrangement forms a grou p, wh ich group is wound on the envelope surface.
  • the conductor arrangement is wound in one of a traverse winding or a pancake winding . The traverse wind ing and the pancake winding enables the conductor arrangement to be unwound so that the first conductor member and the at least one second conductor member are unwound with the same length .
  • the third object of the invention is obtained by one embodiment of the invention , wherein the envelope surface of the body is cylindrical and located at a distance from the a long itud inal axis of the spool, which distance is between 0,05 to 1 , 1 meter, prefera- bly 0,75 to 1 ,0 meter.
  • the winding of the first conductor member and the at least one second conductor member involves plastic deformation at a level that prevent work hardening of the conductor members from introducing defects in attachment between the conductor members and the receptor members.
  • the defect rate of the attachments between the conductor members and the receptor members is reduced in comparison to prior art.
  • the distance of the envelope surface of the body and the longi- tud inal axis of the spool relates to the radius of the spool.
  • conductor members having a higher hardness in comparison to prior art conductor members can be used , wherein the current defect rate in prior art manufacturing proc- ess are maintained .
  • a higher impurity level of the material can be used for the conductor members.
  • the impurity level is of particular sign ificance when a core of the conductor members is made of a copper material .
  • the price of copper material with higher impurity level is less than the price of copper material with lower impurity level , wherein the invention enables less costly conductor members to be used in the manufacturing process of the solar cells and accordingly the overall manufacturing cost of the solar cells is re- cuted .
  • the conductor arrangement contains between three and twelve conductor members.
  • An increased number of conductor members improve the efficiency of the solar cell because a higher degree of the emitted electrons are collected by the conductor members before the emitted electrons fall back into the receptor members.
  • a conductor arrangement containing between three and twelve conductor members are suitable for unwind ing the conductor members without risk of entanglement due to friction between the conductor members.
  • the conductor spool having the conductor arrangement with between three and twelve conductor members has the advantage to enable production of such solar cell without increasing the numbers of interruption of the manufacturing process. Thus, by means of spool a solar cell with three and twelve conductor members can be manufactured with reduced costs.
  • the conductor members of the conductor arrangement each comprises a flat surface that is adapted to be brought into contact with a flat surface of the pair of receptor members.
  • the flat surface is adapted to be attached to the flat surface of the pair of receptor members so to enable emitted electrons to be collected from the surface of the pair of receptor members.
  • the conductor members of the conductor arrangement each comprises a core consisting of copper alloy. Copper is suitable for collecting and conducting the emitted electrons away from the surface of the pair of receptor members due to its low electric resistance.
  • the copper alloy of the core of the conductor members contains more than 99,9% copper.
  • the conductors of the conductor arrangement each comprises a coating of a solder, which coating is arranged on at least a part of the conductors. The coating is adapted to form an attachment between the conductors of the conductor arrangement and the pair of receptor members.
  • the above mentioned objects of the invention are furthermore solved by a method accord ing to claim 1 1 and a solar cell ac- cord ing to claim 15.
  • the method of comprises:
  • the two or more conductor members of the conductor arrangement wound on the conductor spool are fed to the pair of recep- tor members and are cut to appropriate length for connecting the receptor members of the pair of receptor members.
  • the conductor members are mounted on the surface of the pair of receptor members and attached so to enable the conductor members to collect emitted electrons.
  • the conductor spool comprises sufficient numbers of conductor members to enable manufacture of two of more solar cells simultaneously, preferably 6 solar cells simultaneously.
  • the manufacturing cost is reduced by means of the single conductor spool providing conductor members to the plurality of solar cells. Thereby, the number of components of the manufacturing site for providing the conductor members is reduced .
  • the method fur- ther comprises:
  • the first conductor member and the at least one second conductor member are attached to the pair of receptor members by:
  • the method comprises employing between three and twelve conductor members in the method .
  • Fig . 1 shows an example of a method of manufacturing a solar cell accord ing to prior art.
  • Fig . 2a shows an example of a method for manufacturing a solar cell according to a first embodiment of the invention .
  • Fig . 2b shows an example of a method for manufacturing a solar cell according to a second embodiment of the invention .
  • Fig . 3a shows a conductor spool comprising a first conductor member and a second conductor member according to an embod iment of the invention .
  • Fig . 3b shows an enlargement of a first free end and a second free end of the conductor members in figure 3a.
  • Fig . 4 shows a flow chart of a method for manufacturing a solar cell according to an embodiment of the invention .
  • FIG. 1 shows an example of a method for manufacturing a so- lar cell 1 according to prior art.
  • the solar cell 1 comprises a first conductor member 3a and a second conductor member 3b and a pair of receptor members 5 comprising a first receptor member 5a and a second receptor member 5b.
  • the first conductor member 3a is fed from a first conductor spool 10a to the pair of re- ceptor members 5 and the second conductor member 3b is fed from a second conductor spool 1 0b to the pair of receptor members 5.
  • the conductor members 3a, 3b are arranged on the pair of receptor members 5 so that each conductor member 3a, 3b extends from a first side of the first receptor member 5a to a second side of the second receptor member 5b.
  • the first side of the first receptor member 5a and the second side of the second receptor member 5b is d irected in opposite directions.
  • FIG 1 the arrangement of the conductor members 3a, 3b on the first side of the first receptor member 5a is indicated with a fu ll line and the arrangement of the conductor members 3a, 3b on the second side of the second receptor member 5b is indicated by a dashed line.
  • the method of producing the solar cell 1 in figure 1 accordingly, requires one conductor spool 10a, 1 0b for each conductor member 3a, 3b. Accord ing ly, the method suffers from the problems indicated in the prior arts section .
  • Figure 2a shows a method for manufacturing a solar cell 1 according to the invention . In the method a sing le conductor spool 10 is used for feed ing the plurality of conductor member 3a, 3b to the pair of receptor member 5.
  • the conductor spool 10 comprises a body 12 comprising a cylindrical envelope surface 14.
  • the conductor spool 10 further comprises a conductor arrangement 16 that comprises a first flexible and elongated conductor member 3a wound on the envelope surface 14 and a second flexible and elongated conductor member 3b wound on the envelope surface 14.
  • the conductor members 3a, 3b of the conductor arrangement are simultaneously fed from the envelope surface 14 to the pair of receptor members 5.
  • the conductor spool 10 it is possible to manufacture the solar cell 1 comprising the plurality of conductor members 3a, 3b, wherein it is assured that the conductor spool 10 is exchanged at a sing le occasion when both the first conductor member 3a and the second conductor member 3b has been un- wound from the envelope surface 14.
  • the conductor spool can improve the yield of the manufacturing process of the solar cell 1 and reduces the risk of manufacturing defects on the solar cell 1 , such as insufficient alignment of the conductor members 3a, 3b, insufficient attachment of the conductor mem- bers 3a, 3b to the pair of receptor members etc.
  • the conductor spool 1 0 is arranged so that the envelope surface 14 of the body 12 is located at a distance R from a long itudinal axis L of the conductor spool 10 which distance R is between 0, 1 to 1 , 1 meter, preferably 0, 75 to 1 ,0 meter.
  • the plastic deformation that induces work hardening of the conductor members 3a, 3b are kept on a sufficient low level to avoid introducing defects in attachment between the conductor members and the receptor members.
  • conductor members 3a, 3b of copper having a h igher impurity level can be used .
  • the work hardening of the conductor members 3a, 3b is induced by the bending of the conductor member 3a, 3b when winding the conductor member 3a, 3b on the conductor spool 10.
  • Figure 2b discloses an example of a conductor spool 10, which conductor spool 10 comprises a conductor arrangement 16 that comprises four flexible and elongated conductor members 3a, 3b, 3c, 3d that are fed to the pair of receptor members 5. It shall be understood that the number of conductor members 3a, 3b of the conductor arrangement 16 can contain further conductor members 3a, 3b than the first conductor member 3a and the second conductor member 3b, preferably between three and twelve conductor members.
  • Figure 3a discloses a conductor spool of figure 2a in detail .
  • the first conductor member 3a comprises a first free end 20a that extends away from the envelope surface 16 and the second conductor member 3b comprises a second free end 20b that extends away from the envelope surface 16.
  • the first free end 20a and the second free end 20b are adapted to be fed simu ltane- ously from the envelope surface 1 6 to the pair of receptor members 5 while the conductor arrangement 16 is unwound from the enevelope surface 14 of the conductor spool 1 0.
  • the first conductor member 3a and the second conductor mem- bers 3b are arranged wound next to each other on the envelope surface 14.
  • the first conductor member 3a is wound on the envelope surface 14 with a first length
  • the second conductor member is wound on the envelope surface 14 with a second length .
  • the first and the second lengths are arranged the same or essentially the same.
  • the first con- ductor member 3a and the second conductor member 3b are completely unwound at the same time, wherein a conductor spool 10 is required to be exchanged only at a sing le occasion instead of multiple exchange of a plurality of conductor spools 10a, 10b as in prior art.
  • Figure 3b shows an enlargement of the first free end 20a of a first conductor member 3a and the second free end 20b of a second conductor member 3b.
  • the first conductor member 3a and the second conductor member 3b are separate members that are grou ped together to the conductor arrangement 16. Accordingly, a separation 22 in the form of a gap exists between the first conductor member 3a and the second conductor member 3b.
  • Each of the conductor members 3a, 3b comprises a core 24 consisting of a copper alloy and a coating of a solder arranged on the core 24 on at least a part of the conductor members 3a, 3b.
  • Figure 4 discloses a method for manufacturing a solar cell 1 ac- cording to the invention .
  • the method comprises, in a step 100, simultaneously feed ing the first conductor member 3a and the second conductor member 3b to the pair of receptor members 5 from the single conductor spool 10.
  • the conductor spool is rotated so that the same length of the first conductor member 3a as the second conductor member 3b are fed to the pair of receptor members 5.
  • the method comprises, in a step 1 10, cutting the first conductor member 3a and the second conductor member 3b to a length that enables the conductor members 3a, 3b to extend between the first side of the first receptor member 5a to the second side of the second receptor member 5b.
  • the first side and second side of the pair of receptor members 5 are directed in opposite directions.
  • the method comprises, in a step 1 20, mounting the first conductor member 3a and the second conductor member 3b on the pair of receptor members 5 so that each conductor member 3a, 3b contacts the first surfaces of the first receptor member 5s and the second surface of the second receptor member 5b.
  • the method comprises attaching the first conductor member 3a and the second conductor member 3b on the first surface respectively the second surface of a pair of receptor members 5 by means of heating the pair of receptor members 5 with the conductor member 3a, 3b so that the solder coating 24 on the conductor members 3a, 3b melts, and thereafter cooling the pair of receptor members 5 with the conductor members 3a, 3b so that the melted solder coatings 24 solidify and attach- ments are formed between the pair of receptor member 5 and the conductor members 3a, 3b.
  • PV wire Prior art
  • One conductor member, also denoted PV wire, with a (typically) width of 2 mm is wound on one conductor spool .
  • the weight of the conductor spool is typically 10 kg .
  • One copper strip with a width of 36 mm is slit in to 18 flat conductor members each with a width of 2 mm. After deburring and tin plating the 18 conductor members are wound besides each other on one conductor spool .
  • the weight or length of the proposed conductor members are not restricted due to production or handling constraints, and thus the weight of one conductor member can e.g . be increased to 50 kg .
  • By winding 18 conductor members on one conductor spool the number of conductor spools to be handled and changed is reduced to from 15000 per year to approximately 1 70 conductor spools in one production line.
  • the weight of each conductor spool will be increased from 10 kg to 900 kg .
  • the present invention is not limited to the embodiment disclosed but may be varied and modifies within the scope of the following claims.

Abstract

A conductor spool (10) used for manufacturing a solar cell (1) that comprises a plurality of conductor members (3a, 3b) and a pair of receptor members (5). The spool (10) comprises a body (12) comprising an envelope surface (14) and a conductor arrangement (16) comprising a first flexible elongated conductor member (3a) and second flexible elongated conductor member wound on the envelope surface (14). The first conductor member and the second conductor member comprises a first free end (20a) respectively a second free end (20b) that extend away from the envelope surface and are adapted to be fed simultaneously from the envelope surface to the pair of receptor members (5).

Description

A CONDUCTOR SPOOL, A METHOD FOR MAN UFACTUR- ING A SOLAR CELL AND A SOLAR CELL
FI ELD OF THE I NVENTI ON
The present invention relates to a conductor spool used for manufacturing a solar cell that comprises a plurality of conductor members and a pair of receptor members. The spool comprises a body comprising a cylindrical envelope surface and a conductor arrangement comprising a first flexible elongated conductor member wound on the envelope surface. The first conductor member comprises a first free end that extends away from the envelope surface and is adapted to be fed from the envelope surface to the pair of receptor members. The invention further relates to a method for manufacturing a solar cell , and a solar cell manufactured using the method .
PRIOR ART
The solar cell comprises the pair of receptor members comprising a semi-conducting material , usually in the form of a pair of silicon wafers. Each receptor member of the pair of receptor members are connected by the plurality of conductor members by means of attaching each conductor member by soldering so that it extends between the receptor members. Thereby, the conductor members are adapted to extend between a voltage differences within the pair of receptor members.
When the solar cell is subjected to sunshine electrons are emitted from the receptor members and collected by the conductor members. In order to obtain sufficient high voltage a plurality of solar cell are often connected serially to an array of solar cells. The array of solar cells comprises typically 60 solar cells or more.
The solar cell is manufactured by means of providing each of the plurality of conductor member from a separate conductor spool to the pair of receptor members and attach ing the conductor members to the pair of receptor members. A problem during manufacturing the solar cell is that the conductor spools run out of conductor members at different occasions. Thereby, the pro- duction must be interrupted and the empty conductor spool replaced with a full conductor spool . Such interruption in the manufacturing process of solar cells reduces the yield of the manufacturing process of solar cells and increases the risk of manufacturing defects, such as insufficient alignment of the conductor members, insufficient attachment of the conductor members to the pair of receptor members, etcetera.
It is furthermore desired to increase the number of conductor members and thereby decreasing the d istance between adjacent conductor members in order to improve the efficiency of the solar cell . The efficiency of the solar cell is improved when the number of conductor members increase because a higher degree of the emitted electrons are collected by the conductor members before the emitted electrons fall back into the semi- conducting material of the receptor members. However, with increasing number of conductor members also the manufacturing cost of the solar cell increases due to the increased number of interruptions in the manufacturing process when providing the conductor members from the conductor spools to the receptor members and increased number of solar cells that must be corrected or scraped .
Each solar cell further comprises a plurality of printed conductors that extends perpend icular between two parallel conductor members. Normally, the printed conductors comprises mainly silver that provides high electrical conductivity. The printed con- ductors are printed on the surface of the solar cells with a density that provides an acceptable efficiency. By means of increasing the number of soldered conductor members on the solar cell, the distance between the conductor members is decreased . With the reduced distance between the conductor members also the density of the printed conductors can be reduced while maintaining the same efficiency. Accordingly, the reduced length between the conductor members results in that the total length of the printed conductor can be reduced while maintain ing the same efficiency. Th is allows the material for the printed conductors to be reduced , which may resu lt in a significant reduction in the manufacturing cost, in particular when using silver printed conductors. A further problem when manufacturing solar cell is to obtain a sufficient attachment of the conductor members to the receptor members when soldering the conductor members to the receptor members because of difference in thermal expansion between the material of the receptor members and the conductor mem- bers.
Each conductor member comprises a core, such as made of copper or a copper alloy, and a solder material coated on the core. After that the conductor members have been arranged on the receptor members, the conductor members and receptor members are heated until the solder material melts and thereafter the conductor members and receptor members are cooled down so that the solder coatings solid ify and attachments are formed . However, due to the difference in thermal expansion of the conductor members and the receptor members, it is necessary that the conductor members are sufficiently soft so that the difference in thermal expansion can be accommodated by plastic yield of the conductor members. I n order to reduce the number of defect attachments of the conductor members to the pair of receptor members and thus reducing the number of solar cells that must be corrected or scraped , it is desired to maintain the softness of the conductor members.
US 5,735,967 discloses a wiring apparatus comprising a first and a second bobbin mounted on a common bobbin shaft. Each of the bobbins comprises a wire wound on its cylindrical surface. A terminal end of the wire on the first bobbin is connected to an initial end of the wire on the second bobbin , whereupon the connected wire on the bobbins is unwound . The arrangement allows the first bobbin to be replaced before the wire on the second bobbin has fully been unwound .
OBJ ECTS AND SUMMARY OF THE I NVENTION The object of the present invention is to provide an improved conductor spool and method for manufacturing a solar cell and a solar cell manufactured by the method . A first object of the invention is to provide a conductor spool and a method that reduces the occurrence of interruption in the manufacturing proc- ess in comparison to prior art. A second object of the invention is to provide a conductor spool and a method that reduces the number of defects in the attachment between the conductor members and the receptor members in comparison to prior art. A third object of the invention is to provide a conductor spool that enables conductors with higher impurity levels to be used in the manufacturing of solar cells.
The first and the second objects are obtained by a conductor spool according to the preamble of claim 1 , which conductor spool is characterized in that the conductor arrangement comprises at least one second flexible elongated conductor member wound on the envelope surface, the second conductor member comprises a second free end that extends away from the envelope surface and which second free end is adapted to be fed from the envelope surface to the pair of receptor members si- multaneously with the first free end of the first conductor member.
The first conductor member and the at least one second conduc- tor member are wound on the envelope surface of the body of the conductor spool so that the first free end and the second free end extend away from the envelope surface. The first conductor member and the at least one second conductor member are wound on the envelope surface so to enable the first con- ductor member and the at least one second conductor member to be unwound simu ltaneously from the envelope surface of the conductor spool and thereby allow the first free end and the second free end to be fed simultaneously to the pair of receptor members.
The manufacturing process is thereby simplified in that the manufacturing process requires only handling of a single conductor spool. Furthermore, the conductor spool enables the first conductor member and the at least one second conductor mem- ber to be completely unwound at the same time and therefore requiring on ly exchange of a sing le empty conduct spool with a fu ll conductor spool in comparison with multiple exchange of conductor spools at separate occasions as in prior art. Accordingly, the conductor spool facilitates the manufacturing of solar cells, in particular when the solar cells are to be provided with a large number of conductor members, which solar cells thereby obtains a high efficiency in comparison to prior art solar cells.
The first conductor member and the at least one second conduc- tor member are flexible in that they are adapted to be fed to the pair of receptor members and arranged on the receptor members. Such feed ing and arrangement may involve a portion of plastic deformation of the conductor members that preferably should be kept at low levels. According to one embodiment of the invention , the pair of receptor comprises a semi-conducting material , such as a pair of silicon wafers. According to one embodiment of the invention , the first conductor member and the at least one second conductor member of the conductor arrangement constitutes separate members. The separate members are adapted after being fed to the pair of receptor members so that they extend over different parts of the pair of receptor members. Preferably, the conductor members are arranged so that the first conductor member and the at least one second conductor member extends parallel with each other on the pair of receptor members. According to one embodiment of the invention , the first conductor member is wound on the envelope surface with a first length and the at least one second conductor member is wound on the envelope surface with a second length , wherein the first and the second length are the same or essentially the same.
Thereby, a certain rotation of the spool results in unwinding of a first part of the conductor member and a second part of the at least one second conductor member, wherein the first and the second part have the same length or essentially the same length. In case of a rectangular pair or receptor members, the same length of the first and the second conductor member are necessary for connecting the pair of receptor members.
According to one embodiment of the invention , the first conduc- tor member and the at least one second conductor member are arranged wound next to each other on the envelope surface. Thereby, the conductor arrangement forms a grou p, wh ich group is wound on the envelope surface. According to one embodiment of the invention , the conductor arrangement is wound in one of a traverse winding or a pancake winding . The traverse wind ing and the pancake winding enables the conductor arrangement to be unwound so that the first conductor member and the at least one second conductor member are unwound with the same length .
The third object of the invention is obtained by one embodiment of the invention , wherein the envelope surface of the body is cylindrical and located at a distance from the a long itud inal axis of the spool, which distance is between 0,05 to 1 , 1 meter, prefera- bly 0,75 to 1 ,0 meter.
Thereby, the winding of the first conductor member and the at least one second conductor member involves plastic deformation at a level that prevent work hardening of the conductor members from introducing defects in attachment between the conductor members and the receptor members. Accord ingly, the defect rate of the attachments between the conductor members and the receptor members is reduced in comparison to prior art. The distance of the envelope surface of the body and the longi- tud inal axis of the spool relates to the radius of the spool.
Alternatively, conductor members having a higher hardness in comparison to prior art conductor members can be used , wherein the current defect rate in prior art manufacturing proc- ess are maintained . By allowing the hardness of the conductor members to be h igher than prior art conductor members a higher impurity level of the material can be used for the conductor members. The impurity level is of particular sign ificance when a core of the conductor members is made of a copper material . The price of copper material with higher impurity level is less than the price of copper material with lower impurity level , wherein the invention enables less costly conductor members to be used in the manufacturing process of the solar cells and accordingly the overall manufacturing cost of the solar cells is re- duced . According to one embodiment of the invention , the conductor arrangement contains between three and twelve conductor members. An increased number of conductor members improve the efficiency of the solar cell because a higher degree of the emitted electrons are collected by the conductor members before the emitted electrons fall back into the receptor members. A conductor arrangement containing between three and twelve conductor members are suitable for unwind ing the conductor members without risk of entanglement due to friction between the conductor members. The conductor spool having the conductor arrangement with between three and twelve conductor members has the advantage to enable production of such solar cell without increasing the numbers of interruption of the manufacturing process. Thus, by means of spool a solar cell with three and twelve conductor members can be manufactured with reduced costs.
According to one embodiment of the invention , the conductor members of the conductor arrangement each comprises a flat surface that is adapted to be brought into contact with a flat surface of the pair of receptor members. The flat surface is adapted to be attached to the flat surface of the pair of receptor members so to enable emitted electrons to be collected from the surface of the pair of receptor members.
According to one embodiment of the invention , the conductor members of the conductor arrangement each comprises a core consisting of copper alloy. Copper is suitable for collecting and conducting the emitted electrons away from the surface of the pair of receptor members due to its low electric resistance.
According to one embodiment of the invention , the copper alloy of the core of the conductor members contains more than 99,9% copper. According to one embod iment of the invention , the conductors of the conductor arrangement each comprises a coating of a solder, which coating is arranged on at least a part of the conductors. The coating is adapted to form an attachment between the conductors of the conductor arrangement and the pair of receptor members.
The above mentioned objects of the invention are furthermore solved by a method accord ing to claim 1 1 and a solar cell ac- cord ing to claim 15. The method of comprises:
- simu ltaneously feed ing a first conductor member and at least one second conductor member to a pair of receptor members from a single conductor spool ,
- cutting the first conductor member and the at least one second conductor member,
- mounting the first conductor member and the at least one second conductor member on a flat surface of the pair of receptor members, and
- attaching the first conductor member and the at least one sec- ond conductor to the flat surface of the pair of receptor members.
The two or more conductor members of the conductor arrangement wound on the conductor spool are fed to the pair of recep- tor members and are cut to appropriate length for connecting the receptor members of the pair of receptor members. The conductor members are mounted on the surface of the pair of receptor members and attached so to enable the conductor members to collect emitted electrons.
According to one embodiment of the invention , the conductor spool comprises sufficient numbers of conductor members to enable manufacture of two of more solar cells simultaneously, preferably 6 solar cells simultaneously. The manufacturing cost is reduced by means of the single conductor spool providing conductor members to the plurality of solar cells. Thereby, the number of components of the manufacturing site for providing the conductor members is reduced .
According to one embodiment of the invention , the method fur- ther comprises:
- simu ltaneously feeding a first length of the first conductor member and a second length of the at least one second conductor member to the pair of receptor members, which first and second length are the same or essentially the same.
According to one embodiment of the invention , the first conductor member and the at least one second conductor member are attached to the pair of receptor members by:
- heating the pair of receptor members with the first conductor member and the at least one second conductor member so that a solder coatings on the conductor members melts, and
- cooling the pair of receptor members with the first conductor member and the at least one second conductor member so that the melted solder coatings solid ify and an attachment is formed between the pair of receptor members and the first conductor member respectively the at least one second conductor member.
According to one embod iment of the invention , the method comprises employing between three and twelve conductor members in the method .
BRI EF DESCRI PTI ON OF TH E DRAWI NGS
The invention will now be explained more closely by the descri p- tion of different embodiments of the invention and with reference to the appended figures.
Fig . 1 shows an example of a method of manufacturing a solar cell accord ing to prior art.
Fig . 2a shows an example of a method for manufacturing a solar cell according to a first embodiment of the invention . Fig . 2b shows an example of a method for manufacturing a solar cell according to a second embodiment of the invention . Fig . 3a shows a conductor spool comprising a first conductor member and a second conductor member according to an embod iment of the invention .
Fig . 3b shows an enlargement of a first free end and a second free end of the conductor members in figure 3a. Fig . 4 shows a flow chart of a method for manufacturing a solar cell according to an embodiment of the invention .
DETAI LED DESCRI PTI ON OF PREFERRED EM BOD I MENTS OF THE I NVENTION
Figure 1 shows an example of a method for manufacturing a so- lar cell 1 according to prior art. The solar cell 1 comprises a first conductor member 3a and a second conductor member 3b and a pair of receptor members 5 comprising a first receptor member 5a and a second receptor member 5b. The first conductor member 3a is fed from a first conductor spool 10a to the pair of re- ceptor members 5 and the second conductor member 3b is fed from a second conductor spool 1 0b to the pair of receptor members 5. The conductor members 3a, 3b are arranged on the pair of receptor members 5 so that each conductor member 3a, 3b extends from a first side of the first receptor member 5a to a second side of the second receptor member 5b. The first side of the first receptor member 5a and the second side of the second receptor member 5b is d irected in opposite directions.
In figure 1 the arrangement of the conductor members 3a, 3b on the first side of the first receptor member 5a is indicated with a fu ll line and the arrangement of the conductor members 3a, 3b on the second side of the second receptor member 5b is indicated by a dashed line. The method of producing the solar cell 1 in figure 1 , accordingly, requires one conductor spool 10a, 1 0b for each conductor member 3a, 3b. Accord ing ly, the method suffers from the problems indicated in the prior arts section . Figure 2a shows a method for manufacturing a solar cell 1 according to the invention . In the method a sing le conductor spool 10 is used for feed ing the plurality of conductor member 3a, 3b to the pair of receptor member 5. The conductor spool 10 comprises a body 12 comprising a cylindrical envelope surface 14. The conductor spool 10 further comprises a conductor arrangement 16 that comprises a first flexible and elongated conductor member 3a wound on the envelope surface 14 and a second flexible and elongated conductor member 3b wound on the envelope surface 14. The conductor members 3a, 3b of the conductor arrangement are simultaneously fed from the envelope surface 14 to the pair of receptor members 5. By means of the conductor spool 10, it is possible to manufacture the solar cell 1 comprising the plurality of conductor members 3a, 3b, wherein it is assured that the conductor spool 10 is exchanged at a sing le occasion when both the first conductor member 3a and the second conductor member 3b has been un- wound from the envelope surface 14. Accordingly, the conductor spool can improve the yield of the manufacturing process of the solar cell 1 and reduces the risk of manufacturing defects on the solar cell 1 , such as insufficient alignment of the conductor members 3a, 3b, insufficient attachment of the conductor mem- bers 3a, 3b to the pair of receptor members etc.
The conductor spool 1 0 is arranged so that the envelope surface 14 of the body 12 is located at a distance R from a long itudinal axis L of the conductor spool 10 which distance R is between 0, 1 to 1 , 1 meter, preferably 0, 75 to 1 ,0 meter. Thereby, the plastic deformation that induces work hardening of the conductor members 3a, 3b are kept on a sufficient low level to avoid introducing defects in attachment between the conductor members and the receptor members. Furthermore, conductor members 3a, 3b of copper having a h igher impurity level can be used . The work hardening of the conductor members 3a, 3b is induced by the bending of the conductor member 3a, 3b when winding the conductor member 3a, 3b on the conductor spool 10.
Figure 2b discloses an example of a conductor spool 10, which conductor spool 10 comprises a conductor arrangement 16 that comprises four flexible and elongated conductor members 3a, 3b, 3c, 3d that are fed to the pair of receptor members 5. It shall be understood that the number of conductor members 3a, 3b of the conductor arrangement 16 can contain further conductor members 3a, 3b than the first conductor member 3a and the second conductor member 3b, preferably between three and twelve conductor members.
Figure 3a discloses a conductor spool of figure 2a in detail . The first conductor member 3a comprises a first free end 20a that extends away from the envelope surface 16 and the second conductor member 3b comprises a second free end 20b that extends away from the envelope surface 16. The first free end 20a and the second free end 20b are adapted to be fed simu ltane- ously from the envelope surface 1 6 to the pair of receptor members 5 while the conductor arrangement 16 is unwound from the enevelope surface 14 of the conductor spool 1 0.
The first conductor member 3a and the second conductor mem- bers 3b are arranged wound next to each other on the envelope surface 14. The first conductor member 3a is wound on the envelope surface 14 with a first length and the second conductor member is wound on the envelope surface 14 with a second length . The first and the second lengths are arranged the same or essentially the same. Thereby, it is assured that the conductor arrangement 16 wound on the envelope surface 14 involves the same length or essentially the same length of the first conductor member 3a as the length of the second conductor member 3b. Thereby, it is assured that the conductor spool 10 runs out of both the first conductor member 3a and the second conductor member 3b at the same time. Accordingly, the first con- ductor member 3a and the second conductor member 3b are completely unwound at the same time, wherein a conductor spool 10 is required to be exchanged only at a sing le occasion instead of multiple exchange of a plurality of conductor spools 10a, 10b as in prior art.
Figure 3b shows an enlargement of the first free end 20a of a first conductor member 3a and the second free end 20b of a second conductor member 3b. The first conductor member 3a and the second conductor member 3b are separate members that are grou ped together to the conductor arrangement 16. Accordingly, a separation 22 in the form of a gap exists between the first conductor member 3a and the second conductor member 3b. Each of the conductor members 3a, 3b comprises a core 24 consisting of a copper alloy and a coating of a solder arranged on the core 24 on at least a part of the conductor members 3a, 3b.
Figure 4 discloses a method for manufacturing a solar cell 1 ac- cording to the invention . The method comprises, in a step 100, simultaneously feed ing the first conductor member 3a and the second conductor member 3b to the pair of receptor members 5 from the single conductor spool 10. During the feeding of the conductor members 3a, 3b the conductor spool is rotated so that the same length of the first conductor member 3a as the second conductor member 3b are fed to the pair of receptor members 5.
The method comprises, in a step 1 10, cutting the first conductor member 3a and the second conductor member 3b to a length that enables the conductor members 3a, 3b to extend between the first side of the first receptor member 5a to the second side of the second receptor member 5b. The first side and second side of the pair of receptor members 5 are directed in opposite directions. The method comprises, in a step 1 20, mounting the first conductor member 3a and the second conductor member 3b on the pair of receptor members 5 so that each conductor member 3a, 3b contacts the first surfaces of the first receptor member 5s and the second surface of the second receptor member 5b.
In a step 130, the method comprises attaching the first conductor member 3a and the second conductor member 3b on the first surface respectively the second surface of a pair of receptor members 5 by means of heating the pair of receptor members 5 with the conductor member 3a, 3b so that the solder coating 24 on the conductor members 3a, 3b melts, and thereafter cooling the pair of receptor members 5 with the conductor members 3a, 3b so that the melted solder coatings 24 solidify and attach- ments are formed between the pair of receptor member 5 and the conductor members 3a, 3b.
Exam ple In the following an embodiment of the invention will be exemplified with referees to prior art.
Prior art One conductor member, also denoted PV wire, with a (typically) width of 2 mm is wound on one conductor spool . The weight of the conductor spool is typically 10 kg .
Assuming a medium sized solar module factory with a capacity of 200 - 250 MW per year. The factory requires 6 tabbing machines besides each other (one solar modu le consists of six strings or rows of solar cells besides each other). Each tabbing mach ine is a single-track tabbing machine with a required throughput of 1 200 cells per hour. The total output from the fac- tory is 7200 cells per hour. The solar cells of the comparison are arranged with the following properties: - Number of conductor members per solar cell: 3
- Number of conductor spools for one tabbing machine 3
- Total number of conductor spools for six tabbing mach ines: 18. The production line will consume 18 kg copper per hour split on 18 conductor spools. Hence, every 10 hours 18 conductor spools need to be changed . I n one year, approximately 15000 conductor spools need to be changed in one production line Invention
One copper strip with a width of 36 mm is slit in to 18 flat conductor members each with a width of 2 mm. After deburring and tin plating the 18 conductor members are wound besides each other on one conductor spool . The weight or length of the proposed conductor members are not restricted due to production or handling constraints, and thus the weight of one conductor member can e.g . be increased to 50 kg . By winding 18 conductor members on one conductor spool , the number of conductor spools to be handled and changed is reduced to from 15000 per year to approximately 1 70 conductor spools in one production line. The weight of each conductor spool will be increased from 10 kg to 900 kg . The present invention is not limited to the embodiment disclosed but may be varied and modifies within the scope of the following claims.

Claims

1 . A conductor spool (10) used for manufacturing a solar cell ( 1 ) that comprises a plurality of conductor members (3a, 3b) and a pair of receptor members (5) , the spool (10) comprises a body (12) comprising a envelope surface (14) and a conductor arrangement (16) comprising a first flexible elongated conductor member (3a) wound on the envelope surface (14), the first conductor member (3a) comprises a first free end (20a) that ex- tends away from the envelope surface (14) and is adapted to be fed from the envelope surface (14) to the pair of receptor members (5),
characterized in that
the conductor arrangement (16) comprises at least one second flexible elongated conductor member (3b) wound on the envelope surface (14), the second conductor member comprises a second free end (20b) that extends away from the envelope surface (14), the second free end (20b) is adapted to be fed from the envelope surface (14) to the pair of receptor members (5) simultaneously with the first free end (20a) of the first conductor member (3a).
2. A conductor spool (10) according to claim 1 , wherein the first conductor member (3a) and the at least one second conductor member of the conductor arrangement (16) constitutes separate members.
3. A conductor spool (10) according to any of claim 1 and 2 , wherein the first conductor member (3a) is wound on the enve- lope surface (14) with a first length and the at least one second conductor member is wound on the envelope surface ( 14) with a second length , wherein the first and the second length are the same.
4. A conductor spool (10) according to any of the preceding claims, wherein the first conductor member (3a) and the at least one second conductor member are arranged wound next to each other on the envelope surface (14) .
5. A conductor spool (10) according to any of the preceding claims, wherein the conductor arrangement (1 6) is wound in one of a traverse wind ing and a pancake winding .
6. A conductor spool (10) according to any of the preceding claims, wherein the envelope surface (14) of the body (12) is cylindrical and located at a distance (R) from the a longitudinal axis (L) of the spool (10), which distance (R) is between 0, 1 to 1 , 1 meter, preferably 0,75 to 1 ,0 meter.
7. A conductor spool (10) according to any of the preceding claims, wherein the conductor arrangement (16) contains between three and twelve conductor members (3a, 3b).
8. A conductor spool (10) according to any of the preceding claims, wherein the conductor members (3a, 3b) of the conduc- tor arrangement (16) each comprises a flat surface that is adapted to be brought into contact with a flat surface of the pair of receptor members (5).
9. A conductor spool (10) according to any of the preceding claims, wherein the conductor members (3a, 3b) of the conductor arrangement (16) each comprises a core (24) consisting of copper alloy.
10. A conductor spool (10) according to any of the preceding claims, wherein the conductor members (3a, 3b) of the conductor arrangement (16) each comprises a coating (26) of a solder, which coating (26) is arranged on at least a part of the conductor members (3a, 3b).
1 1 . A method for manufacturing a solar cell (1 ), wherein the method comprises: - simu ltaneously feeding a first conductor member (3a) and at least one second conductor member to a pair of receptor members (5) from a sing le conductor spool (10) ,
- cutting the first conductor member (3a) and the at least one second conductor member,
- mounting the first conductor member (3a) and the at least one second conductor member on a flat surface of the pair of receptor members (5), and
- attaching the first conductor member (3a) and the at least one second conductor to the flat surface of the pair of receptor members (5).
12. A method according to claim 1 1 , wherein the method comprises:
- simu ltaneously feeding a first length of the first conductor member (3a) and a second length of the at least one second conductor member to the pair of receptor members (5) , which first and the second length are the same.
13. A method accord ing to any of claim 1 1 and 12 , wherein the first conductor member (3a) and the at least one second conductor member are attached to the pair of receptor members (5) by:
- heating the pair of receptor members (5) with the first conduc- tor member (3a) and the at least one second conductor member so that a solder coatings on the conductor members (3a, 3b) melts, and
- cooling the pair of receptor members (5) with the first conductor member (3a) and the at least one second conductor member so that the melted solder coatings solid ify and an attachment is formed between the pair of receptor members (5) and the first conductor member (3a) respectively the at least one second conductor member.
14. A method according to any of claim 11-13, wherein the method comprises employing between three and twelve conductor members (3a, 3b) in the method.
15. A solar cell (1), characterized in that the solar cell (1) is manufactured by a method according to any of claim 11-14.
PCT/EP2011/073953 2011-12-23 2011-12-23 A conductor spool, a method for manufacturing a solar cell and a solar cell WO2013091725A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/073953 WO2013091725A1 (en) 2011-12-23 2011-12-23 A conductor spool, a method for manufacturing a solar cell and a solar cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/073953 WO2013091725A1 (en) 2011-12-23 2011-12-23 A conductor spool, a method for manufacturing a solar cell and a solar cell

Publications (1)

Publication Number Publication Date
WO2013091725A1 true WO2013091725A1 (en) 2013-06-27

Family

ID=45478294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/073953 WO2013091725A1 (en) 2011-12-23 2011-12-23 A conductor spool, a method for manufacturing a solar cell and a solar cell

Country Status (1)

Country Link
WO (1) WO2013091725A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151373A (en) * 1989-06-05 1992-09-29 Mitsubishi Denki Kabushiki Kaisha Method of making a solar cell electrode
JP2003298095A (en) * 2002-04-02 2003-10-17 Sharp Corp Method for producing solar cell module
US20050241692A1 (en) * 2002-08-29 2005-11-03 Rubin Leonid B Electrode for photovoltaic cells, photovoltaic cell and photovoltaic module
EP2284942A1 (en) * 2008-06-06 2011-02-16 Fujikura, Ltd. Photoelectric conversion element
JP2011129641A (en) * 2009-12-16 2011-06-30 Dainippon Screen Mfg Co Ltd Wiring forming method and wiring forming device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151373A (en) * 1989-06-05 1992-09-29 Mitsubishi Denki Kabushiki Kaisha Method of making a solar cell electrode
JP2003298095A (en) * 2002-04-02 2003-10-17 Sharp Corp Method for producing solar cell module
US20050241692A1 (en) * 2002-08-29 2005-11-03 Rubin Leonid B Electrode for photovoltaic cells, photovoltaic cell and photovoltaic module
EP2284942A1 (en) * 2008-06-06 2011-02-16 Fujikura, Ltd. Photoelectric conversion element
JP2011129641A (en) * 2009-12-16 2011-06-30 Dainippon Screen Mfg Co Ltd Wiring forming method and wiring forming device

Similar Documents

Publication Publication Date Title
EP2966693B1 (en) Solar cell module
US20100116323A1 (en) Interconnector, Solar Cell String Using the Interconnector and Method of Manufacturing Thereof, and Solar Cell Module, Using The Solar Cell String
US9530926B2 (en) Automated flexible solar cell fabrication and interconnection utilizing rolls expanded metallic mesh
US20090159116A1 (en) Interconnector, solar cell string using the interconnector and method of manufacturing thereof, and a solar cell module using the solar cell string
US20110300661A1 (en) Solar cell interconnection method using a flat metallic mesh
TW201444103A (en) Photovoltaic cell element having a specific electrode configuration
CN106206766A (en) Solar battery cell, cell piece array, battery component and preparation method thereof
JP2006059991A (en) Solar battery module and its manufacturing method
JP2013522881A (en) Flexible solar cell interconnection apparatus and method
CN108074996B (en) Solar cell and solar cell panel including the same
EP3171412B1 (en) Apparatus and method for attaching interconnector of solar cell panel
US10672942B2 (en) Solar cell module and method for producing same
EP3026715A1 (en) Solar cell module
JP5058395B2 (en) Solar cell module manufacturing apparatus and solar cell module manufacturing method
US20100263706A1 (en) Solar cell module and method for manufacturing solar cell module
JP2007173619A (en) Method and apparatus for manufacturing solar cell module
CN111200035B (en) Solar cell module and method for manufacturing same
US20230068031A1 (en) Solar cell and solar cell module
CA2749423C (en) Connector for pv cells and method for its production
WO2013091725A1 (en) A conductor spool, a method for manufacturing a solar cell and a solar cell
KR200489603Y1 (en) solar cell modules
JP2009081317A (en) Solar cell module and its manufacturing method
CN110828599A (en) Weldable conductive belt for photovoltaic and application thereof
CN117716518A (en) Method and apparatus for wiring photovoltaic cells
EP3826074B1 (en) Solar cell and solar cell panel including the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11808212

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11808212

Country of ref document: EP

Kind code of ref document: A1