KR101721667B1 - Multicore conductor wire for solar cell module - Google Patents

Multicore conductor wire for solar cell module Download PDF

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Publication number
KR101721667B1
KR101721667B1 KR1020160075009A KR20160075009A KR101721667B1 KR 101721667 B1 KR101721667 B1 KR 101721667B1 KR 1020160075009 A KR1020160075009 A KR 1020160075009A KR 20160075009 A KR20160075009 A KR 20160075009A KR 101721667 B1 KR101721667 B1 KR 101721667B1
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South Korea
Prior art keywords
solar cell
stranded conductor
conductor wire
cell module
wire
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KR1020160075009A
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Korean (ko)
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김진우
김정익
박기홍
김지성
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엘에스전선 주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/20—Metal tubes, e.g. lead sheaths
    • 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
    • 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
    • H01L31/0248—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 characterised by their semiconductor bodies
    • H01L31/036—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 characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes
    • H01L31/0392—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 characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

The present invention relates to a multicore conductor wire for a solar cell module. Specifically, the present invention increases the output of a solar cell module and prevents a crack on a substrate due to excellent flexibility. The present invention improves workability due to having excellent flex resistance or the like.

Description

TECHNICAL FIELD [0001] The present invention relates to a multilayer conductor wire for a solar cell module,

The present invention relates to twisted-wire conductors for solar cell modules. More particularly, the present invention relates to a solar cell module capable of raising the output of a solar cell module, having excellent flexibility, capable of suppressing cracks on the substrate, Wire conductor wire.

A solar cell is a device that converts light energy into electrical energy by using p-type semiconductor and n-type semiconductor. When electrons and electrons generated in the light are moved to the p- and n-poles, Is a device that uses a photoelectric effect in which a potential difference (photovoltaic power) is generated and a current flows.

1 schematically shows a conventional solar cell module.

As shown in FIG. 1, in a conventional solar cell module, a plurality of solar cells 1, which is the minimum unit for generating electric power, are arranged in a panel, and the solar cells 1 And a ribbon wire 100 connected in series.

2 schematically shows a cross-sectional view of a flat ribbon ribbon 100 used in a conventional solar cell module.

2, the conventional planar ribbon wire 100 includes a rectangular conductor 110 and a solder plated layer 120 formed on the surface thereof for connection with the solar cell 1. 3, the area of contact with the substrate is large when the flat wire ribbon 100 is fixed to the substrate of the solar cell 1 by soldering, as shown in Fig. 3, so that the area covering the light absorbing surface of the substrate is And most of the light reaching the upper surface of the flat ribbon ribbon 100 is totally reflected, thereby lowering the solar cell output rate.

As described above, the conventional flat ribbon ribbon 100 has a large contact area with the substrate of the solar battery cell 1 and has insufficient flexibility. Therefore, the ribbon wire 10 has the above- Cracking of the substrate is more serious.

Therefore, not only can the output of the solar cell module be increased, but also the ribbon wire for the solar cell module which can suppress cracking of the substrate due to its excellent flexibility and is excellent in the bending resistance, It is a fact that is demanded.

It is an object of the present invention to provide a stranded conductor wire for a solar cell module capable of improving the output rate of a solar cell.

Another object of the present invention is to provide a stranded conductor wire for a solar cell module which is excellent in flexibility and can suppress cracking of a substrate of the solar cell module.

Further, it is an object of the present invention to provide a twisted-wire conductor wire for a solar cell module which is excellent in bending resistance and can improve workability and the like.

In order to solve the above problems,

A twisted conductor wire for a solar cell module, the twisted conductor wire being formed by twisting a plurality of wire conductors to each other at a constant pitch, the pitch being 4 to 52 times the total outer diameter of the twisted conductor wire.

Here, the plurality of stranded conductors include one stranded conductor disposed at the center and other stranded conductors surrounding the perimeter to form a perimeter layer, and the total number N of the stranded conductors and the total number of the peripheries n satisfy the relationship of the following equation (1)

[Equation 1]

N = 3n (n + 1) + 1

Wherein the diameter d of one stranded conductor and the total diameter D of the stranded conductor wire satisfy the relationship of the following formula (2): " (2) "

&Quot; (2) "

D = (1 + 2n) d

The stranded conductor wire is characterized in that the diameter of the stranded conductor is 65 to 210 탆.

The stranded conductor wire has a nominal cross-sectional area of 0.01 to 0.3 mm 2.

Further, the stranded conductor is provided with a tough pitch copper (TPC), an oxygen free copper (OFC) or a phosphorous deoxidized copper.

And a plated layer formed on the surface of each of the plurality of strand conductors or including at least one metal selected from the group consisting of tin (Sn), zinc (Zn), and aluminum (Al) Lt; / RTI >

The twisted conductor wire is characterized in that a solder plating layer containing tin (Sn) as a main component is formed on the surface of each or all of the plurality of wire conductors.

Wherein the solder plated layer contains 59 to 65 wt% of tin (Sn), 33 to 39 wt% of lead (Pb), 1.5 to 2.5 wt% of silver (Ag), 57 to 63 wt% of tin , And 37 to 43% by weight of lead (Pb), having a melting point of 175 to 180 占 폚 and a thickness of 4 to 100 占 퐉.

On the other hand, there is provided a solar cell module including a plurality of solar cell substrates and an annular wire for the solar cell module connecting the plurality of substrates in series.

The stranded conductor wire for a solar cell module according to the present invention exhibits an excellent effect of improving the output ratio of a solar cell by causing irregular reflection of light by a curved surface due to a twisted structure of conductors.

Further, the twisted-wire conductor wire for a solar cell module according to the present invention exhibits an excellent effect of suppressing cracking of the substrate of the solar cell module of the substrate due to flexibility due to the stranded conductor.

Further, the twisted conductor wire for the solar cell module according to the present invention can precisely adjust the twist pitch of the twisted wire conductor to maximize irregular reflection of light on the surface, and at the same time, has excellent flexing resistance, .

1 schematically shows a conventional solar cell module.
2 schematically shows a cross-sectional view of the flat ribbon ribbon 10 used in the solar cell module shown in Fig.
FIG. 3 is a schematic view illustrating a state in which light is irradiated to a solar cell having the flat ribbon ribbon shown in FIG.
4 is a schematic cross-sectional view of a stranded conductor wire for a solar cell module according to the present invention.
FIG. 5 is a schematic view illustrating a state in which light is irradiated to a solar cell having a twisted-pair conductor wire for the solar cell module shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Like reference numerals designate like elements throughout the specification.

4 is a schematic cross-sectional view of a stranded conductor wire for a solar cell module according to the present invention. As shown in FIG. 4A, the stranded conductor wires for a solar cell module according to the present invention may include a plurality of strand conductors 10 joined together by being twisted at a predetermined pitch.

Here, the strand conductor 10 is made of a conductor mainly composed of copper (Cu), for example, a tough pitch copper (TPC), an oxygen free copper (OFC), a phosphorous deoxidized Copper) or the like.

The nominal cross-sectional area of the stranded conductor wire including the plurality of strand conductors 10 may be 0.01 to 0.3 mm 2, and the diameter of one stranded conductor 10 is inversely proportional to the number of the strand conductors 10. As shown in FIG. 4A, the plurality of strand conductors 10 may be surrounded by other strand conductors 10 around a single strand conductor 10 disposed at the center, and the strand conductors 10 (N) and the total number (n) of the peripheral layers may satisfy the relationship of the following equation (1).

[Equation 1]

N = 3n (n + 1) + 1

The total number n of the perimeter layers, the diameter d of one strand of the strand conductor 10, and the diameter D of the stranded conductor wire as a whole can satisfy the following equation (2).

&Quot; (2) "

D = (1 + 2n) d

For example, as shown in FIG. 4A, when the total number n of the peripheral layers is 1, the total number N of the strand conductors 10 is 7, and the diameter D of the whole stranded conductor is May be three times the diameter (d) of one strand conductor (10). Further, the diameter D of the stranded conductor may be 170 to 540 μm and the diameter d of the stranded conductor 10 may be 65 to 210 μm.

When the diameter d of one strand conductor 10 is less than 65 占 퐉 and the diameter D of the whole stranded conductor is less than 170 占 퐉 according to the resistance increase of the stranded conductor wire, When the diameter d of one strand conductor 10 is more than 210 占 퐉 and the diameter D of the whole stranded conductor is more than 540 占 퐉, Cracks are generated in the substrate of the battery module, and the output may be greatly reduced.

The stranded conductor wire for a solar cell module according to the present invention adopts a stranded conductor in which a plurality of stranded conductors 10 are combined as a conductor, thereby, when fixed to a solar cell substrate as shown in FIG. 5, The area of covering the light absorbing surface of the substrate is minimized to improve the output ratio of the solar cell and the area of contact with the substrate is increased compared with the conventional annular conductor wire, And the output rate of the solar cell can be improved.

Further, the twisted-wire conductor wire for a solar cell module according to the present invention has a curved surface due to the twisted structure of the conductor, thereby maximizing the diffuse reflection compared to the conventional square-shaped conductor wire or the annular conductor wire when light is irradiated on the surface, Of the present invention.

In the stranded conductor wire for a solar cell module according to the present invention, the plurality of strand conductors 10 constituting the stranded conductor wire are twisted at a constant pitch, and the pitch may be 4 to 52 times the diameter D of the whole stranded conductor.

If the pitch is less than four times the total diameter D of the stranded conductor, the contact resistance between the wire and the solar cell cell substrate may increase and the output rate of the solar cell may be greatly reduced. On the other hand, The surface curvature of the stranded conductor wire for the solar cell module is insufficient, resulting in insufficient diffuse reflection of the light irradiated on the surface of the stranded conductor wire, thereby lowering the output rate of the solar cell, It is possible to cause a crack in the substrate when the substrate is bent in a state where the substrate is fixed to the solar cell cell substrate and the bending resistance of the wire is lowered, The workability may be deteriorated.

Meanwhile, in order to suppress corrosion, the stranded conductor wire for a solar cell module according to the present invention may have a structure in which a plating layer 20 is formed on the surface of each stranded conductor 10 as shown in FIG. 4B, A plating layer 30 may be formed on the entire surface of the plurality of strand conductors 10 and the plating layers 20 and 30 may include a metal such as tin (Sn), zinc (Zn), aluminum (Al) can do. Here, the thickness of the plating layers 20 and 30 may be 0.5 to 100 탆.

The stranded conductor wire for a solar cell module according to the present invention may be fixed to a solar cell substrate by an electrically conductive adhesive, an electrically conductive adhesive film, or soldering. Here, the electrically conductive adhesive or adhesive film may include a thermosetting or photo-curable resin, conductive particles, a curing agent, an adhesion aid, and the like. When compressed between the stranded conductor wire and the solar cell cell substrate, The electrically conductive particles electrically connect the stranded conductor wire and the electrode on the solar cell substrate.

Meanwhile, when the stranded conductor wire for the solar cell module is fixed to the solar cell substrate by soldering, the plating layers 20 and 30 may be a solder plated layer, and the solder plated layer is composed mainly of tin (Sn) Lead (Pb), silver (Ag), and the like. For example, the solder plated layer contains 59 to 65 wt% of tin (Sn), 33 to 39 wt% of lead (Pb), 1.5 to 2.5 wt% of silver (Ag) % And lead (Pb) 37 to 43% by weight. The solder plating layer may have a melting point of 175 to 180 캜 and may have a thickness of 4 to 100 탆 depending on the constituents and the blending ratio. When soldering the stranded conductor wire to the solar cell substrate by the solder plating layer, Can be uniformly and stably formed with an adhesion width of 368 to 1084 mu m.

However, when the stranded conductor wire is fixed to the solar cell substrate at a high temperature by soldering, a crack may occur in the substrate due to a different thermal expansion coefficient between the stranded conductor wire and the substrate, And is preferably fixed to the solar cell substrate by an adhesive.

The present invention relates to a solar cell module including a plurality of solar cells including a silicon semiconductor substrate having a PN junction and a stranded conductor wire for the solar cell module connecting the solar cells in series.

Here, the number of the stranded conductor wires for the solar cell module may differ according to the desired electromotive force of the solar cell module, and when the stranded conductor wire is fixed to the electrode of the solar cell substrate by soldering, An Ag paste or the like and the electrode may further include a plurality of Ag pads having a large area to improve the adhesion of the stranded wire and the substrate.

For example, when the size of the solar cell substrate is 6 inches, the number of the stranded conductor wires may be 12, and the width of the electrodes of the solar cell substrate may be 50 탆, the spacing between adjacent electrodes is 1.8 mm, the area of the silver (Ag) pad is 700 탆 2, and the number of the electrodes is 500.

<Examples>

1. Manufacturing Example

A solar cell module having a conductor wire for a solar cell module and a 6-inch solar cell according to each of the embodiments and comparative examples shown in Table 1 below was manufactured. The pitches shown in the table below are expressed in multiples of the total outer diameter of the stranded conductor wire.


 monorail Stranded wire Total outside diameter Small diameter Total outside diameter Number of wires pitch Comparative Example 1 360 탆 Comparative Example 2






























136 탆







360 탆











7 2 Comparative Example 3 3 Example 1 4 Example 2 5 Example 3 10 Example 4 15 Example 5 20 Example 6 25 Example 7 30 Example 8 35 Example 9 40 Example 10 45 Example 11 50 Example 12 51 Example 13 52 Comparative Example 4 53 Comparative Example 5 54 Comparative Example 6 55 Comparative Example 7 38 탆 100 탆



24 Comparative Example 8 45 탆 120 탆 Comparative Example 9 53 탆 140 탆 Comparative Example 10 60 탆 160 탆 Example 14 68 탆 180 탆 Example 15 76 탆 200 탆 Example 16 113 ㎛ 300 탆 Example 17 151 μm 400 탆 Example 18 189 탆 500 탆 Example 19 197 ㎛ 520 μm Example 20 204 μm 540 탆 Comparative Example 11 227 ㎛ 600 탆

2. Property evaluation

1) Evaluation of Flexibility

Two specimens of 1 m conductor wire according to each of the examples and comparative examples were prepared, and the flexural resistance of the conductor wire specimens was evaluated using a flexural strength tester. Specifically, when a 200 g load is applied to the lower end of the conductor wire, the number of reciprocating movements at the moment of disconnection is measured when the right and left 90 ° reciprocating motion is performed at a speed of 30 times / minute based on the intermediate point of the conductor wire And the average of the measured values for the two specimens was calculated.

2) Crack evaluation

A load of 6,000 Pa was uniformly applied to the entire front side of the solar cell module having the conductor wire and the 6-inch solar cell according to each of Examples and Comparative Examples for 1 hour, Was applied uniformly to a load of 5,400 Pa for 1 hour, and this was repeated three times in total. After the test in which the mechanical load was applied in this manner, it was confirmed whether or not a crack occurred in the substrate.

3) Evaluation of solar cell output

For the solar cell module having the conductor wire and the 6-inch solar cell according to each of the embodiments and the comparative example, the crack evaluation was performed on the solar cell module described in 2). Then, the solar simulator was used to measure the light instantaneously And the maximum output was measured.

The evaluation results of the physical properties are shown in Table 2 below.

Flexibility [times] Crack [Yes / No] Output [Watt] Output increase rate (%)
[Comparative Example 1] Comparative Example 1 54 Yes - 0 Comparative Example 2 141 No - 1.2 Comparative Example 3 137 No - 1.8 Example 1 134 No - 6.7 Example 2 132 No - 6.4 Example 3 127 No - 5.8 Example 4 117 No - 5.2 Example 5 104 No - 5.1 Example 6 97 No - 5.3 Example 7 84 No - 5.1 Example 8 74 No - 5.3 Example 9 68 No - 5.2 Example 10 52 No - 5.1 Example 11 46 No - 5.0 Example 12 45 No - 5.2 Example 13 43 No - 5.1 Comparative Example 4 41 Yes - -1.8 Comparative Example 5 42 Yes - -1.9 Comparative Example 6 40 Yes - -2.1 Comparative Example 7 - No 278 - Comparative Example 8 - No 283 - Comparative Example 9 - No 287 - Comparative Example 10 - No 293 - Example 14 - No 308 - Example 15 - No 311 - Example 16 - No 321 - Example 17 - No 324 - Example 18 - No 317 - Example 19 - No 315 Example 20 - No 316 Comparative Example 11 - Yes 239 -

As shown in Table 2, the twisted conductor wire according to the present invention has flexibility and bending resistance remarkably higher than the single wire by precisely controlling the twist pitch, the small wire diameter and the total outer diameter of the wire, It was confirmed that cracks were suppressed by the external mechanical load and the output was remarkably increased.

On the other hand, in the conductor wire of Comparative Example 1, the flexibility and bending resistance largely decreased as a single wire instead of a twisted wire. As a result, the solar cell board provided with the conductor wire was cracked due to external mechanical load, .

In addition, it was confirmed that the contact wires of Comparative Examples 2 and 3 were excessively short in pitch, so that the contact resistance between the conductor wire and the substrate of the solar cell module was increased, thereby significantly lowering the output of the solar cell module.

In addition, the conductive wires of Comparative Examples 4 to 6 had excessively long pitches, resulting in reduced flexibility and bending resistance, cracks were generated in the substrate due to the external mechanical load on the solar cell module having such flexibility, and some of the conductor wires were disconnected It was confirmed that the output significantly decreased.

Further, the conductor wires of Comparative Examples 7 to 10 were so small that the small wire diameter and the total outer diameter were so small that the output of the solar cell module decreased to less than 300 W as the resistance increased. On the other hand, It was found that the substrate of the solar cell module was cracked and the output was greatly reduced to less than 300 W.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims. . It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

10: wire conductor 20, 30: plated layer

Claims (9)

As a stranded conductor wire for a solar cell module,
A plurality of wire conductors are formed by being twisted at a constant pitch,
Wherein the pitch is 4 to 52 times the total diameter of the stranded conductor wire,
The diameter of one stranded conductor is 65 to 210 탆,
Wherein the total diameter of the stranded conductor wire is 170 to 540 탆,
Stranded conductor wire. The method according to claim 1,
Wherein the plurality of stranded conductors comprise one stranded conductor disposed centrally and other stranded conductors surrounding the same to form a perimeter layer,
(N) of the stranded conductors and the total number (n) of the peripheries satisfy the following relationship (1)
[Equation 1]
N = 3n (n + 1) + 1
Wherein the diameter d of one stranded conductor and the diameter D of the stranded conductor wire as a whole satisfy the following relationship: &quot; (2) &quot;
&Quot; (2) &quot;
D = (1 + 2n) d delete 3. The method according to claim 1 or 2,
Wherein the stranded conductor wire has a nominal cross-sectional area of 0.3 mm &lt; 2 &gt; or less. 3. The method according to claim 1 or 2,
Wherein the stranded conductor is composed of a Tough Pitch Copper (TPC), an Oxygen-Free Copper (OFC) or a Phosphrous Deoxidized Copper. 3. The method according to claim 1 or 2,
Wherein a plated layer is formed on the surface of each of the plurality of strand conductors or at least one metal selected from the group consisting of tin (Sn), zinc (Zn), and aluminum (Al). 3. The method according to claim 1 or 2,
And a solder plating layer containing tin (Sn) as a main component is formed on the surface of each or all of the plurality of strand conductors. 8. The method of claim 7,
The solder plated layer contains 59 to 65 wt% of tin (Sn), 33 to 39 wt% of lead (Pb), 1.5 to 2.5 wt% of silver (Ag), 57 to 63 wt% of tin Pb) of 37 to 43% by weight, the melting point is 175 to 180 占 폚, and the thickness is 4 to 100 占 퐉. A solar cell module comprising a plurality of solar cell substrates and a stranded conductor wire for the solar cell module according to any one of claims 1 to 3 for connecting the plurality of substrates in series.
KR1020160075009A 2016-03-08 2016-06-16 Multicore conductor wire for solar cell module KR101721667B1 (en)

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CN113921640A (en) * 2021-10-14 2022-01-11 云上新能源开发(杭州)有限公司 Series welding process for interconnection material and battery string
CN117080313B (en) * 2023-10-12 2024-01-09 金阳(泉州)新能源科技有限公司 Series welding method for reducing bending degree of back contact battery

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JPH07336044A (en) * 1994-06-08 1995-12-22 At & T Corp Solder medium for circuit interconnection
JP2003123542A (en) * 2001-10-11 2003-04-25 Fujikura Ltd Aerial insulated wire
KR20130011328A (en) * 2011-07-21 2013-01-30 엘지전자 주식회사 Ribbon and solar cell module comprising the same
KR101283114B1 (en) * 2011-10-27 2013-07-05 엘지이노텍 주식회사 Solar cell module and preparing method of the same

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