WO2015068632A1 - Solar cell output measurement tool and solar cell output measurement method - Google Patents
Solar cell output measurement tool and solar cell output measurement method Download PDFInfo
- Publication number
- WO2015068632A1 WO2015068632A1 PCT/JP2014/078867 JP2014078867W WO2015068632A1 WO 2015068632 A1 WO2015068632 A1 WO 2015068632A1 JP 2014078867 W JP2014078867 W JP 2014078867W WO 2015068632 A1 WO2015068632 A1 WO 2015068632A1
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- Prior art keywords
- solar cell
- measuring
- terminal
- probe pins
- voltage
- Prior art date
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- 238000005259 measurement Methods 0.000 title claims abstract description 111
- 238000000691 measurement method Methods 0.000 title description 3
- 239000000523 sample Substances 0.000 claims abstract description 119
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 210000004027 cell Anatomy 0.000 description 147
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
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- 229910000679 solder Inorganic materials 0.000 description 5
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910004613 CdTe Inorganic materials 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910021424 microcrystalline silicon Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06733—Geometry aspects
- G01R1/06738—Geometry aspects related to tip portion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/073—Multiple probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2601—Apparatus or methods therefor
-
- 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
-
- 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
- the present invention relates to a solar cell output measuring jig and a solar cell output measuring method.
- an output measurement jig for a solar battery cell having a plurality of probe pins that are in contact with bus bar electrodes of the solar battery cell is generally used (for example, see Patent Documents 1 and 2).
- the present inventors include a plurality of probe pins that are in contact with linear electrodes (finger electrodes) formed on the surface of the solar battery cell, and a holder that holds the probe pin.
- a plurality of the probe pins are arranged, a current measurement terminal for measuring the current characteristics of the solar battery cell by being arranged on the linear electrode, and a plurality of the probe pins are arranged,
- a solar cell having a voltage measurement terminal for measuring voltage characteristics of the solar cell by being disposed on the linear electrode, wherein the current measurement terminal and the voltage measurement terminal are provided in parallel;
- a measuring jig has been proposed (see, for example, Patent Document 3). This proposed technique solves the problem of finger electrodes that are not subject to measurement.
- the finger electrode in the solar battery cell is often formed by baking the Ag paste after screen printing, and the variation in the thickness direction is large. Therefore, even with this proposed technique, the contact area between each probe pin and the finger electrode is not constant, and as a result, there is a problem that the contact resistance varies and it is difficult to obtain an accurate output value.
- an object of the present invention is to provide a solar cell output measuring jig and a solar cell output measuring method that can reduce variations in measured resistance values and enable stable output measurement.
- a plurality of probe pins are arranged, and a current measuring terminal for measuring the current characteristics of the solar battery cell;
- a plurality of probe pins are arranged, and a voltage measuring terminal for measuring voltage characteristics of the solar battery cell;
- a holder for holding the current measurement terminal and the voltage measurement terminal in parallel;
- the surface of the contact portion in contact with the finger electrode of the solar cell has a plurality of grooves. It is an output measuring jig for solar cells.
- ⁇ 3> The solar cell output measuring jig according to ⁇ 2>, wherein an average interval between adjacent grooves in a plurality of concentric grooves having different diameters is 30 ⁇ m to 300 ⁇ m.
- ⁇ 4> The solar cell output measuring jig according to any one of ⁇ 1> to ⁇ 3>, wherein an average depth of the grooves is 30 ⁇ m to 250 ⁇ m.
- ⁇ 5> A plurality of probe pins of the current measurement terminal are arranged in a zigzag, The solar cell output measurement jig according to any one of ⁇ 1> to ⁇ 4>, wherein a plurality of probe pins of the voltage measurement terminal are arranged in a zigzag manner.
- ⁇ 6> An arrangement step of arranging the current measurement terminal and the voltage measurement terminal of the output measuring jig for a solar battery cell according to any one of ⁇ 1> to ⁇ 5> on a finger electrode of the solar battery cell; And a measuring step of measuring electrical characteristics of the solar cell while irradiating light on the surface of the solar cell.
- the present invention it is possible to solve the conventional problems, achieve the object, reduce variations in measured resistance values, and enable stable output measurement for a solar cell. And an output measuring method for solar cells.
- FIG. 1A is a bottom view of an example of a contact portion of a probe pin.
- 1B is a cross-sectional view of the contact portion of FIG. 1A.
- FIG. 2 is a bottom view of another example of the contact portion of the probe pin.
- FIG. 3A is a bottom view of another example of the contact portion of the probe pin.
- 3B is a cross-sectional view of the contact portion of FIG. 3A.
- FIG. 4 is a photograph of the bottom surface of an example of the contact portion of the probe pin.
- FIG. 5 is a perspective view of a photograph of an example of finger electrodes in a solar battery cell.
- FIG. 6A is a schematic diagram of a contact portion between a probe pin contact portion and a finger electrode at the time of output measurement by a conventional solar cell output measurement jig.
- FIG. 6B shows a schematic diagram of an example of a contact between a probe pin contact portion and a finger electrode at the time of output measurement by the solar cell output measurement jig of the present invention.
- FIG. 7 is a perspective view for explaining an example of a process for performing an electrical measurement of the solar battery cell with the solar cell output measuring jig of the present invention.
- FIG. 8 is a perspective view of an example showing the output measuring jig for a solar battery cell of the present invention.
- FIG. 9 is a bottom view showing an example of an arrangement of current measurement terminals and voltage measurement terminals.
- FIG. 10 is a bottom view showing another example of the arrangement of current measurement terminals and voltage measurement terminals.
- FIG. 11 is a side view showing a state in which the current measuring terminals arranged in a zigzag are brought into contact with the finger electrodes.
- FIG. 12 is a bottom view showing another example of the contact portion of the probe pin.
- FIG. 13 is a bottom view showing another example of the contact portion of the probe pin.
- FIG. 14 is a side view showing another example of the contact portion of the probe pin.
- FIG. 15 is a diagram for explaining current measurement by the solar cell output measuring jig.
- FIG. 16 is a diagram for explaining voltage measurement using a solar cell output measuring jig.
- FIG. 17A is a bottom view of the contact portion of the probe pin according to the first embodiment.
- FIG. 17B is a cross-sectional view of the contact portion of FIG. 17A.
- FIG. 18 is a schematic diagram illustrating an arrangement of current measurement terminals and voltage measurement terminals according to the first embodiment.
- FIG. 19 is a schematic diagram for explaining a method of measuring electrical characteristics in the example.
- the output measuring jig for solar cells of the present invention has a current measuring terminal, a voltage measuring terminal, and a holder, and further includes other members as necessary.
- the current measuring terminal is formed by arranging a plurality of probe pins.
- the current measuring terminal is a terminal for measuring current characteristics of the solar battery cell.
- the voltage measurement terminal includes a plurality of probe pins arranged.
- the voltage measurement terminal is a terminal that measures voltage characteristics of the solar battery cell.
- the plurality of probe pins in the current measuring terminal are connected to each other by, for example, solder connection of a copper wire cable and to an ammeter.
- a plurality of the probe pins in the voltage measurement terminal are connected to each other by solder connection of a copper wire cable and to a voltmeter, for example.
- Each of the plurality of probe pins of the current measurement terminal and the plurality of probe pins of the voltage measurement terminal has a plurality of grooves on the surface of the contact portion in contact with the finger electrode of the solar battery cell. That is, the probe pin has a contact portion that contacts the finger electrode of the solar battery cell, and the surface of the contact portion has a plurality of grooves. Since the surface of the contact portion has a plurality of grooves, the contact area between the probe pin and the finger electrode can be increased. As a result, variation in the measured resistance value is reduced, and stable output measurement is possible.
- the shape of the groove is an appearance of the groove, for example, a shape observed in a bottom view of the contact portion.
- the shape of the plurality of grooves may be, for example, a lattice shape, or may be a plurality of concentric circles having different diameters. However, the plurality of concentric circles having different diameters further reduces variation in resistance value. It is preferable in that it can be performed.
- the cross-sectional shape of the groove is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include a rectangle and a triangle.
- FIG. 1A is a bottom view of a contact portion having a plurality of grooves formed of a plurality of concentric circles having different diameters
- FIG. 1B is a cross-sectional view thereof.
- the groove in FIG. 1B has an average depth of 45 ⁇ m
- the cross-sectional shape of the groove is an equilateral triangle having the bottom as a vertex (vertical angle is 60 °) and the surface of the contact portion as the bottom.
- FIG. 2 is a bottom view of the contact portion having a plurality of grooves configured in a lattice shape.
- FIG. 3A is a bottom view of a contact portion having a plurality of grooves formed of a plurality of concentric circles having different diameters
- FIG. 3B is a cross-sectional view thereof.
- the grooves in FIGS. 3A and 3B are similar to the grooves shown in FIGS. 1A and 1B in that they are concentric, but the center groove is the largest and the depth of the groove is the deepest. Such an embodiment is also an embodiment of the present invention.
- FIG. 4 shows a photograph of the bottom surface of an example of the contact portion of the probe pin.
- FIG. 5 the perspective view of the photograph of an example of the finger electrode in a photovoltaic cell is shown.
- FIG. 6A is a schematic diagram of contact points between the contact portions of the probe pins and the finger electrodes at the time of output measurement using a conventional output measuring jig for solar cells.
- FIG. 6B shows a schematic diagram of an example of a contact between a probe pin contact portion and a finger electrode at the time of output measurement by the solar cell output measurement jig of the present invention.
- the finger electrodes in the solar battery cell have a wavy shape rather than a uniform thickness.
- the contact portion 4b of the probe pin is flat, so that there are few contacts with the finger electrode 3a.
- the probe pin contact portion 6B has a plurality of grooves, so that the probe pin contact portion 4b and the finger electrode 3a are provided. The contact area between the probe pin and the finger electrode can be increased.
- the average interval between the adjacent grooves is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 30 ⁇ m to 300 ⁇ m, more preferably 30 ⁇ m to 220 ⁇ m, and more preferably 40 ⁇ m to 150 ⁇ m. Particularly preferred. When the average interval is within the particularly preferable range, it is advantageous in that variation in resistance value can be further reduced.
- the interval between adjacent grooves is the distance between the centers of two adjacent grooves.
- the average interval is an average value when the interval is arbitrarily measured at 10 points in the contact portion.
- the average depth of the groove is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 30 ⁇ m to 250 ⁇ m, and more preferably 45 ⁇ m to 210 ⁇ m.
- the depth of the groove may be uniform or non-uniform in the plurality of grooves.
- the average depth is an average value when the depth of the groove is arbitrarily measured at 10 locations in the contact portion.
- the average width of the groove is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include 10 ⁇ m to 100 ⁇ m.
- the average width is an average value when the width of the groove is arbitrarily measured at ten locations in the contact portion.
- the arrangement of the plurality of probe pins in the current measurement terminal or the voltage measurement terminal is not particularly limited and may be appropriately selected according to the purpose. Examples thereof include a linear arrangement and a zigzag arrangement. Among these, a zigzag arrangement is preferable. That is, it is preferable that the plurality of probe pins of the current measuring terminal are arranged in a zigzag manner. The plurality of probe pins of the voltage measurement terminal are preferably arranged in a zigzag manner.
- the method for forming the groove is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include cutting.
- Solar cell There is no restriction
- Examples of the crystalline solar battery cell include a single crystal silicon solar battery cell and a polycrystalline silicon solar battery cell.
- Examples of the thin film solar cell include an amorphous silicon solar cell, a CdS / CdTe solar cell, a dye-sensitized solar cell, an organic thin film solar cell, a microcrystalline silicon solar cell (tandem solar cell). Cell).
- the solar battery cell has a finger electrode as a collecting electrode.
- the finger electrodes are usually formed by baking after the Ag paste is applied to the surface to be the light receiving surface of the solar cell by screen printing or the like.
- a plurality of lines having a width of, for example, 50 ⁇ m to 200 ⁇ m are formed substantially in parallel at a predetermined interval, for example, every 2 mm, over the entire light receiving surface.
- the solar battery cell has a photoelectric conversion element.
- a back electrode made of aluminum or silver is provided on the back side opposite to the light receiving surface of the photoelectric conversion element.
- the back electrode is formed on the back surface of the solar cell by, for example, screen printing, sputtering, or the like.
- the size of the solar cell is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include 156 mm ⁇ 156 mm.
- the holder is not particularly limited as long as it is a holder that holds the current measurement terminal and the voltage measurement terminal in parallel, and can be appropriately selected according to the purpose.
- the material of the holder is not particularly limited and may be appropriately selected depending on the purpose. Examples thereof include a resin material. Examples of the resin material include glass epoxy resin, acrylic resin, and polycarbonate resin.
- the upper and lower surfaces of the holder are, for example, a long side corresponding to the length of one side of the solar battery cell, and a short side corresponding to the width when the current measuring terminal and the voltage measuring terminal are arranged in parallel. It consists of.
- a plurality of probe pins are embedded in a predetermined arrangement constituting the current measurement terminal and the voltage measurement terminal across the upper and lower surfaces.
- the output measuring method of the solar battery cell of the present invention includes an arrangement step and a measurement step, and further includes other steps as necessary.
- the arrangement step is particularly limited as long as it is a step of arranging the current measurement terminal and the voltage measurement terminal of the solar cell output measurement jig of the present invention on the finger electrode of the solar cell. And can be appropriately selected according to the purpose.
- the measurement step is not particularly limited as long as it is a step of measuring the electrical characteristics of the solar cell while irradiating light on the surface of the solar cell, and can be appropriately selected according to the purpose. .
- Examples of the electrical characteristics include IV characteristics.
- the solar cell output measuring jig 1 includes a plurality of probe pins 4 that are in contact with the surface electrode 3 formed on the surface of the solar cell 2, and the probe pins 4. And a holder 5 for holding.
- the solar cell output measuring jig 1 constitutes a current measuring terminal 6 by arranging a plurality of probe pins 4 and constitutes a voltage measuring terminal 7 by arranging a plurality of probe pins 4. .
- the output measuring jig 1 for photovoltaic cells is connected with the ammeter 8 while the ends of the plurality of probe pins 4 constituting the current measuring terminal 6 are connected by the solder connection of the copper wire cable. Yes.
- the ends of the plurality of probe pins 4 constituting the voltage measurement terminal 7 are connected to each other by a solder connection of a copper wire cable and to a voltmeter 9.
- Each probe pin 4 has a pin main body 4 a held by the holder 5 and an abutting portion 4 b provided at the tip of the pin main body 4 a and abutting against the surface electrode 3 of the solar battery cell 2.
- the pin body 4a is formed in a columnar shape
- the contact portion 4b is formed in a columnar shape having a larger diameter than the pin body 4a.
- the contact portion 4 b protrudes from the lower surface 5 b of the holder 5
- the end portion of the pin body 4 a protrudes from the upper surface 5 a of the holder 5.
- the probe pins 4 are formed such that the ends of the pin main body 4a protruding from the upper surface 5a of the holder 5 are bound together by solder connection of a copper wire cable, etc.
- a current measuring terminal 6 and a voltage measuring terminal 7 are arranged in the direction.
- a groove is formed on the surface of the contact portion 4 b of the probe pin 4.
- the holder 5 holding the probe pin 4 is formed in a rectangular plate shape using a resin material.
- the upper and lower surfaces 5a and 5b of the holder 5 are composed of a long side corresponding to the length of one side of the solar battery cell 2 and a short side having a width in which the probe pins 4 are arranged in a predetermined shape.
- a plurality of probe pins 4 are embedded in the holder 5 in a predetermined arrangement constituting the current measuring terminal 6 and the voltage measuring terminal 7 between the upper and lower surfaces 5a and 5b.
- the current measuring terminal 6 and the voltage measuring terminal 7 are provided on the lower surface 5 b of the holder 5 in parallel with each other.
- the current measurement terminal 6 and the voltage measurement terminal 7 are both formed in a straight line along the long side direction of the lower surface 5 b of the holder 5.
- Each probe pin 4 constituting the current measurement terminal 6 and the voltage measurement terminal 7 has a contact portion 4b having a cylindrical shape with a diameter of 3.5 mm, and a gap S1 between adjacent contact portions 4b is a general finger electrode. It is set to 0.1 mm shorter than the interval.
- the current measurement terminal 6 has a plurality of finger electrodes 3a parallel to each other as the surface electrode 3, for example, by setting the interval S1 of the contact portions 4b to be in contact with the surface electrode 3 of the solar battery cell 2 to 0.1 mm.
- the contact portions 4b are arranged at intervals shorter than a general interval (for example, 1.0 mm to 2.0 mm) of the finger electrodes 3a. can do. Therefore, according to the output measuring jig 1 for solar cells, even when the intervals between the finger electrodes 3a are varied by the solar cells 2, it is possible to cope with the intervals between all the finger electrodes 3a.
- the probe pin 4 has a plurality of grooves on the surface of the contact portion 4b, so that the contact area between the probe pin 4 and the finger electrode 3a can be increased. This reduces the variation in the measured resistance value and enables stable output measurement.
- the output measuring jig 1 for the solar battery cell includes the current measuring terminal 6 and the voltage measuring terminal 7 so that a single row of probe electrodes serves as the current measuring terminal and the voltage measuring terminal.
- the number of probe pins in contact with the finger electrodes 3a can be increased as compared with the above.
- the contact portions 4b of the probe pins 4 on all the finger electrodes 3a. Can be brought into contact with each other.
- the current measuring terminal 6 and the voltage measuring terminal 7 are formed in parallel, the width of the upper and lower surfaces 5a and 5b of the holder 5 is not increased, and the shadow loss due to the holder 5 is reduced in measuring the electrical characteristics.
- the probe pin 4 has a plurality of grooves on the surface of the contact portion 4b, so that the contact area between the probe pin 4 and the finger electrode 3a can be increased. This reduces the variation in the measured resistance value and enables stable output measurement.
- the current measuring terminal 6 and the voltage measuring terminal 7 have the probe pins 4 partially overlapping in the arrangement direction. That is, the current measuring terminal 6 and the voltage measuring terminal 7 are such that the probe pins 4 are arranged in parallel along the long side direction of the lower surface 5b of the holder 5 and the width of the lower surface 5b of the holder 5 orthogonal to the arrangement direction.
- the probe pins 4 are arranged so that the center of the contact portion 4b of the other probe pin 4 is positioned between the probe pins 4, and the distance S2 between the contact portions 4b is, for example, 0. It is arranged close to 1 mm.
- the current measuring terminal 6 and the voltage measuring terminal 7 are narrowed in the width direction of the lower surface 5b of the holder 5 by causing the contact portions 4b of the probe pins 4 to partially overlap when viewed from the arrangement direction. Can be arranged. Therefore, the width of the holder 5 in contact with the surface of the solar battery cell 2 is narrowed, and a decrease in output due to shadow loss can be prevented.
- the long sides of the upper and lower surfaces 5a and 5b of the holder 5 are the length of one side of the solar cell 2.
- the probe pins 4 constituting the current measuring terminal 6 are arranged in a straight line along the long side direction of the holder 5 with a distance of 0.1 mm and arranged in parallel therewith.
- 42 probe pins 4 constituting the voltage measuring terminal 7 are arranged with an interval of 0.1 mm.
- the solar cell output measuring jig 1 is configured such that both the current measuring terminal 6 and the voltage measuring terminal 7 are zigzag along the long side direction of the lower surface 5 b of the holder 5. Good.
- the current measurement terminal 6 and the voltage measurement terminal 7 are configured such that the abutting portions 4b of the adjacent probe pins 4 partially overlap in the direction orthogonal to the arrangement direction by arranging the probe pins 4 in each row in a zigzag manner. Can be made.
- the current measuring terminals 6 are adjacent to each other when the probe pins 4 are arranged in a zigzag manner along the long side direction of the lower surface 5b of the holder 5 and viewed from the width direction of the lower surface 5b of the holder 5 orthogonal to the arrangement direction.
- the abutting portions 4b of the probe pins 4 are arranged so as to overlap each other.
- the voltage measurement terminal 7 is similarly configured.
- the spacing S3 between the contact portions 4b of the adjacent probe pins 4 is arranged close to 0.1 mm, for example.
- the current measuring terminal 6 and the voltage measuring terminal 7 have no gap across the arrangement direction by partially overlapping the contact portions 4b of the adjacent probe pins 4 in the direction orthogonal to the arrangement direction. . Therefore, according to the output measuring jig 1 for solar cells, as shown in FIG. 11, for example, a so-called bus bar-less structure in which only a plurality of finger electrodes 3a parallel to each other as the surface electrodes 3 are formed at a predetermined interval. In the measurement of the electrical characteristics of the solar battery cell 2, the current measurement terminal 6 and the voltage measurement terminal 7 can be brought into contact with all the finger electrodes 3a regardless of the interval between the finger electrodes 3a.
- the current measurement terminal 6 and the voltage measurement terminal 7 each adjust the overlap width W with the contact portion 4b of the adjacent probe pin 4, thereby narrowing the width of the holder 5 in contact with the surface of the solar battery cell 2. Therefore, it is possible to prevent a decrease in output due to shadow loss. That is, in the configuration in which the probe pins 4 are arranged in a zigzag manner, in order to increase the overlap width in the direction orthogonal to the arrangement direction, the adjacent probe pins 4 are moved in the width direction of the upper and lower surfaces 5a, 5b of the holder 5. However, it is necessary to make them close in the arrangement direction.
- the current measuring terminal 6 and the voltage measuring terminal 7 are spaced at intervals between the finger electrodes 3a as long as the current measuring terminal 6 and the voltage measuring terminal 7 are partially overlapped with the contact portions 4b of the adjacent probe pins 4 in the direction orthogonal to the arrangement direction. Can respond.
- the current measurement terminal 6 and the voltage measurement terminal 7 are configured so that each finger electrode 3a has an overlap width W with the abutting portion 4b of the adjacent probe pin 4 less than a predetermined width, for example, 0.1 mm or less.
- the abutting portion 4b can be abutted in correspondence with the interval, and the width of the holder 5 can be narrowed to prevent a decrease in output due to shadow loss.
- the long sides of the upper and lower surfaces 5a and 5b of the holder 5 are the length of one side of the solar cell 2.
- the probe pins 4 constituting the current measuring terminal 6 are zigzag along the long side direction of the holder 5 with a 0.1 mm interval and 0.1 mm in the direction perpendicular to the arrangement direction. 45 are arranged with an overlap width W of 44, and 44 probe pins 4 constituting the voltage measuring terminal 7 are similarly arranged in parallel therewith at an interval of 0.1 mm.
- the contact portion 4b of the probe pin 4 may have any shape such as a triangular shape or a rhombus shape as shown in FIGS. Moreover, as shown in FIG. 14, the contact part 4b of the probe pin 4 may have a hemispherical tip. Of course, the tip may be flat.
- the solar cell output measuring jig 1 is connected to each probe by connecting a cylinder jig (not shown) to the holder 5 and moving the holder 5 up and down in accordance with the operation of the cylinder jig, or manually.
- the pin 4 may be pressed perpendicularly to the surface electrode 3 of the solar battery cell 2.
- the measurement of the electrical characteristics of the solar cell 2 by the solar cell output measuring jig 1 is performed, for example, when the finger electrode 3a and the back electrode 22 are formed on the photoelectric conversion element.
- the solar battery cell 2 is mounted on the mounting table 30 with the light receiving surface on which the finger electrodes 3a are formed facing upward.
- the mounting table 30 is formed, for example, by applying Au plating to a Cu plate, and is thereby electrically connected to the back electrode 22 of the solar battery cell 2.
- the solar cell output measuring jig 1 is arranged so that each of the probe pins 4 of the current measuring terminal 6 and the voltage measuring terminal 7 and all the finger electrodes 3a are orthogonal to each other.
- the current measuring terminal 6 and the voltage measuring terminal 7 are pressurized with a predetermined load by the load means that does not.
- the solar cell output measuring jig 1 is formed with the current measuring terminal 6 and the voltage measuring terminal 7 so that the contact portions 4b of the probe pins 4 are in contact with the finger electrodes 3a. Therefore, the current measuring terminal 6 can come into contact with all the finger electrodes, and the current characteristics can be measured with higher accuracy.
- the total load applied to the current measuring terminal 6 and the voltage measuring terminal 7 by the load means is preferably in the range of 500 g to 3,000 g. If the total load is less than 500 g, the contact between the contact portion 4b of the probe pin 4 and the finger electrode 3a may be insufficient, leading to a decrease in output. If the total load exceeds 3,000 g, the probe pin 4 There is a possibility of damaging the electrode 3a or the solar battery cell 2.
- the circuit configuration as shown in FIGS. 15 and 16 is taken, and the solar light is irradiated onto the cell surface, so-called four-terminal method.
- the electrical characteristics of the solar battery cell 2 can be measured.
- the solar cell output measuring jig 1 is formed such that the current measuring terminal 6 and the voltage measuring terminal 7 are formed in parallel, so that the width of the upper and lower surfaces 5a and 5b of the holder 5 is not increased.
- the shadow loss due to the holder 5 can be kept low, and the output can be prevented from decreasing.
- the solar cell output measuring jig 1 in which the probe pins 4 in each row of the current measuring terminal 6 and the voltage measuring terminal 7 are arranged in a zigzag manner, the contact portions of the adjacent probe pins 4 are respectively contacted.
- the current measurement terminal 6 can be brought into contact with all the finger electrodes 3a regardless of the interval between the finger electrodes 3a, and the current characteristics can be measured with higher accuracy.
- the overlap width with the contact portion 4b of each adjacent probe pin 4 is less than a predetermined width. For example, by setting it to 0.1 mm or less, the contact portion 4b can be contacted corresponding to the interval between all the finger electrodes 3a, and the width of the holder 5 can be narrowed to prevent a decrease in output due to shadow loss. This makes it possible to measure current-voltage characteristics with higher accuracy.
- the probe pin 4 has a plurality of grooves on the surface of the contact portion 4b, so that the contact area between the probe pin 4 and the finger electrode 3a can be increased. This reduces the variation in the measured resistance value and enables stable output measurement.
- the solar cell output measuring jig 1 to which the present invention is applied is an electric cell solar cell in which a bus bar electrode orthogonal to the finger electrode 3a is formed, in addition to the so-called bus bar-less solar cell 2 described above. It can also be used to measure characteristics.
- the solar cell output measuring jig 1 makes the current measurement terminal 6 and the voltage measurement terminal 7 abut on the bus bar electrode, but as described above, it can be measured without any problem even if it abuts on the finger electrode 3a. It is.
- the solar cell 2 having a bus barless structure used in this example has a 6-inch single crystal silicon photoelectric conversion element, and finger electrodes 3a having a width of 80 ⁇ m and a height of 20 ⁇ m to 30 ⁇ m are arranged at intervals of 2 mm on the light receiving surface side. A plurality of Ag electrodes are formed on the back surface side.
- the finger electrodes are formed by screen printing using silver paste.
- Example 1 The contact surface of the probe pin whose tip is circular (diameter: 1.5 mm) is cut into a concentric angle of 60 °, the average depth is 45 ⁇ m, and the average interval (average pitch) between adjacent circles in the concentric circle is A 60 ⁇ m groove was formed (FIGS. 17A and 17B).
- the probe pins in which the grooves were formed were embedded in a resin material (holder) and fixed so as to be arranged in a zigzag manner as shown in FIG.
- the base portions (socket portions) of the probe pins arranged in this way were bound to each other by being soldered to a copper wire to produce a solar cell output measuring jig.
- One of the bound rows is a current measurement terminal, and the other row is a voltage measurement terminal. These terminals were used by connecting to a solar simulator.
- Example 2 In Example 1, a solar cell output measuring jig was produced in the same manner as in Example 1 except that the average interval (average pitch) between adjacent concentric circles in the groove of the probe pin 4 was 120 ⁇ m. . The average depth of the grooves was 95 ⁇ m.
- Example 3 a solar cell output measuring jig was produced in the same manner as in Example 1 except that the average interval (average pitch) between adjacent concentric circles in the groove of the probe pin 4 was 250 ⁇ m. . The average depth of the grooves was 210 ⁇ m.
- Example 1 a solar cell output measuring jig was produced in the same manner as in Example 1 except that the groove was not formed in the contact portion 4b of the probe pin 4.
- the obtained solar cell output measuring jig 1 was brought into contact with the solar cell 2 having a bus bar-less structure as shown in FIG. 19, and the resistance value between the probe pin and the finger electrode was measured. In addition, the resistance value at the time of 1A current application was measured.
- the measurement was performed using a solar simulator (manufactured by Nisshinbo Mechatronics, PVS1116i) under conditions of illuminance of 1,000 W / m 2 , temperature of 25 ° C., and spectrum AM of 1.5 G (JIS C8913). The measurement was performed five times, the arithmetic average value of the resistance value and the standard deviation ( ⁇ ) were obtained, and the degree of variation for each measurement was examined.
- Examples 1 to 3 The resistance measured when the probe pin contact portion has a plurality of grooves (Examples 1 to 3) compared to the case where the probe pin contact portion does not have a plurality of grooves (Comparative Example 1). It was confirmed that the value was low and there was little variation in resistance value, and more stable output measurement was possible. In particular, when the average interval (average pitch) between adjacent grooves is 40 ⁇ m to 150 ⁇ m (Examples 1 and 2), the variation in resistance value is very small (the standard deviation ( ⁇ ) of the comparative example is a comparative example). 1/3 or less), and was very excellent.
- the solar cell output measuring jig of the present invention increases the contact area between the probe pin and the finger electrode, thereby reducing variations in the measured resistance value and enabling stable output measurement. Can be suitably used for output measurement.
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Abstract
Description
しかし、従来の太陽電池セル用出力測定治具では、プローブピンの立設間隔とフィンガー電極が形成される間隔とが一致しないことが多く、全てのフィンガー電極に対して導通をとることができず、計測の対象から外れるフィンガー電極が発生し、正確な電気的特性を測定することができなくなるという問題がある。 When measuring electrical characteristics of such a solar cell with a bus barless structure, it is necessary to directly contact the probe pin with the finger electrode.
However, in the conventional output measuring jig for solar cells, the interval between the probe pins and the interval at which the finger electrodes are formed often do not coincide with each other, and it is impossible to conduct all the finger electrodes. There is a problem that finger electrodes are removed from the measurement target, and accurate electrical characteristics cannot be measured.
この提案の技術では、計測の対象から外れるフィンガー電極が発生する問題を解決している。
ところが、太陽電池セルにおけるフィンガー電極は、Agペーストをスクリーン印刷後、焼成することにより形成されることが多く、厚み方向のばらつきが大きい。そのため、この提案の技術であっても、個々のプローブピンと、フィンガー電極との接触面積が一定にならず、その結果、接触抵抗がばらつき、正確な出力値が得られにくいという問題がある。 Therefore, in order to solve the above problems, the present inventors include a plurality of probe pins that are in contact with linear electrodes (finger electrodes) formed on the surface of the solar battery cell, and a holder that holds the probe pin. Provided, a plurality of the probe pins are arranged, a current measurement terminal for measuring the current characteristics of the solar battery cell by being arranged on the linear electrode, and a plurality of the probe pins are arranged, A solar cell having a voltage measurement terminal for measuring voltage characteristics of the solar cell by being disposed on the linear electrode, wherein the current measurement terminal and the voltage measurement terminal are provided in parallel; A measuring jig has been proposed (see, for example, Patent Document 3).
This proposed technique solves the problem of finger electrodes that are not subject to measurement.
However, the finger electrode in the solar battery cell is often formed by baking the Ag paste after screen printing, and the variation in the thickness direction is large. Therefore, even with this proposed technique, the contact area between each probe pin and the finger electrode is not constant, and as a result, there is a problem that the contact resistance varies and it is difficult to obtain an accurate output value.
複数のプローブピンが配列されてなり、前記太陽電池セルの電圧特性を測定する電圧測定端子と、
前記電流測定端子及び前記電圧測定端子を並列して保持するホルダとを有し、
前記電流測定端子の複数の前記プローブピン及び前記電圧測定端子の複数の前記プローブピンの各々において、前記太陽電池セルのフィンガー電極に接する当接部の表面が複数の溝を有することを特徴とする太陽電池セル用出力測定治具である。
<2> 複数の溝の形状が、直径の異なる複数の同心円である前記<1>に記載の太陽電池セル用出力測定治具である。
<3> 直径の異なる複数の同心円の溝において、隣接する溝の平均間隔が、30μm~300μmである前記<2>に記載の太陽電池セル用出力測定治具である。
<4> 溝の平均深さが、30μm~250μmである前記<1>から<3>のいずれかに記載の太陽電池セル用出力測定治具である。
<5> 電流測定端子の複数のプローブピンが、ジグザグに配列されており、
電圧測定端子の複数のプローブピンが、ジグザグに配列されている前記<1>から<4>のいずれかに記載の太陽電池セル用出力測定治具である。
<6> 前記<1>から<5>のいずれかに記載の太陽電池セル用出力測定治具の電流測定端子と電圧測定端子とを太陽電池セルのフィンガー電極上に配置する配置工程と、
前記太陽電池セルの表面に光を照射しながら、前記太陽電池セルの電気的特性を測定する測定工程とを含むことを特徴とする太陽電池セルの出力測定方法である。 <1> A plurality of probe pins are arranged, and a current measuring terminal for measuring the current characteristics of the solar battery cell;
A plurality of probe pins are arranged, and a voltage measuring terminal for measuring voltage characteristics of the solar battery cell;
A holder for holding the current measurement terminal and the voltage measurement terminal in parallel;
In each of the plurality of probe pins of the current measurement terminal and the plurality of probe pins of the voltage measurement terminal, the surface of the contact portion in contact with the finger electrode of the solar cell has a plurality of grooves. It is an output measuring jig for solar cells.
<2> The solar cell output measuring jig according to <1>, wherein the shape of the plurality of grooves is a plurality of concentric circles having different diameters.
<3> The solar cell output measuring jig according to <2>, wherein an average interval between adjacent grooves in a plurality of concentric grooves having different diameters is 30 μm to 300 μm.
<4> The solar cell output measuring jig according to any one of <1> to <3>, wherein an average depth of the grooves is 30 μm to 250 μm.
<5> A plurality of probe pins of the current measurement terminal are arranged in a zigzag,
The solar cell output measurement jig according to any one of <1> to <4>, wherein a plurality of probe pins of the voltage measurement terminal are arranged in a zigzag manner.
<6> An arrangement step of arranging the current measurement terminal and the voltage measurement terminal of the output measuring jig for a solar battery cell according to any one of <1> to <5> on a finger electrode of the solar battery cell;
And a measuring step of measuring electrical characteristics of the solar cell while irradiating light on the surface of the solar cell.
本発明の太陽電池セル用出力測定治具は、電流測定端子と、電圧測定端子と、ホルダとを有し、更に必要に応じて、その他の部材を有する。 (Output measurement jig for solar cells)
The output measuring jig for solar cells of the present invention has a current measuring terminal, a voltage measuring terminal, and a holder, and further includes other members as necessary.
前記電流測定端子は、複数のプローブピンが配列されてなる。
前記電流測定端子は、太陽電池セルの電流特性を測定する端子である。
前記電圧測定端子は、複数のプローブピンが配列されてなる。
前記電圧測定端子は、前記太陽電池セルの電圧特性を測定する端子である。 <Current measurement terminal, voltage measurement terminal>
The current measuring terminal is formed by arranging a plurality of probe pins.
The current measuring terminal is a terminal for measuring current characteristics of the solar battery cell.
The voltage measurement terminal includes a plurality of probe pins arranged.
The voltage measurement terminal is a terminal that measures voltage characteristics of the solar battery cell.
前記電圧測定端子における複数の前記プローブピンは、例えば、その端部同士が、銅線ケーブルのはんだ接続により接続されるとともに、電圧計と接続されている。 The plurality of probe pins in the current measuring terminal are connected to each other by, for example, solder connection of a copper wire cable and to an ammeter.
A plurality of the probe pins in the voltage measurement terminal are connected to each other by solder connection of a copper wire cable and to a voltmeter, for example.
前記電流測定端子の複数の前記プローブピン及び前記電圧測定端子の複数の前記プローブピンの各々は、前記太陽電池セルのフィンガー電極に接する当接部の表面に複数の溝を有する。即ち、前記プローブピンは、前記太陽電池セルのフィンガー電極に接する当接部を有し、前記当接部の表面は、複数の溝を有する。
前記当接部の表面が、複数の溝を有することにより、プローブピンとフィンガー電極との接触面積を増やすことができる。その結果、測定される抵抗値のバラツキを少なくし、安定した出力測定が可能になる。 << Probe pin >>
Each of the plurality of probe pins of the current measurement terminal and the plurality of probe pins of the voltage measurement terminal has a plurality of grooves on the surface of the contact portion in contact with the finger electrode of the solar battery cell. That is, the probe pin has a contact portion that contacts the finger electrode of the solar battery cell, and the surface of the contact portion has a plurality of grooves.
Since the surface of the contact portion has a plurality of grooves, the contact area between the probe pin and the finger electrode can be increased. As a result, variation in the measured resistance value is reduced, and stable output measurement is possible.
前記溝の形状としては、特に制限はなく、目的に応じて適宜選択することができ、例えば、直線状、円形状などが挙げられる。前記溝の形状とは、溝の外観であって、例えば、前記当接部の底面図において観察される形状である。 -groove-
There is no restriction | limiting in particular as a shape of the said groove | channel, According to the objective, it can select suitably, For example, linear shape, circular shape, etc. are mentioned. The shape of the groove is an appearance of the groove, for example, a shape observed in a bottom view of the contact portion.
図6Aに、従来の太陽電池セル用出力測定治具による、出力測定時のプローブピンの当接部と、フィンガー電極との接点の模式図を示す。
図6Bに、本発明の太陽電池セル用出力測定治具による、出力測定時のプローブピンの当接部と、フィンガー電極との接点の一例の模式図を示す。 In FIG. 5, the perspective view of the photograph of an example of the finger electrode in a photovoltaic cell is shown.
FIG. 6A is a schematic diagram of contact points between the contact portions of the probe pins and the finger electrodes at the time of output measurement using a conventional output measuring jig for solar cells.
FIG. 6B shows a schematic diagram of an example of a contact between a probe pin contact portion and a finger electrode at the time of output measurement by the solar cell output measurement jig of the present invention.
そのような状態では、従来の太陽電池セル用出力測定治具では、図6Aに示すように、プローブピンの当接部4bが平坦であるため、フィンガー電極3aとの接点が少ない。
一方、本発明の太陽電池セル用出力測定治具では、図6Bに示すように、プローブピンの当接部6Bが複数の溝を有することにより、プローブピンの当接部4bと、フィンガー電極3aとの接点が多くなり、プローブピンとフィンガー電極との接触面積を増やすことができる。 As shown in FIG. 5, the finger electrodes in the solar battery cell have a wavy shape rather than a uniform thickness.
In such a state, in the conventional solar cell output measuring jig, as shown in FIG. 6A, the
On the other hand, in the solar cell output measuring jig of the present invention, as shown in FIG. 6B, the probe pin contact portion 6B has a plurality of grooves, so that the probe
ここで、隣接する溝の間隔は、隣接する2つの溝の中心間の距離である。前記平均間隔は、前記当接部において前記間隔を任意に10箇所測定した際の平均値である。 In the plurality of grooves, the average interval between the adjacent grooves is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 30 μm to 300 μm, more preferably 30 μm to 220 μm, and more preferably 40 μm to 150 μm. Particularly preferred. When the average interval is within the particularly preferable range, it is advantageous in that variation in resistance value can be further reduced.
Here, the interval between adjacent grooves is the distance between the centers of two adjacent grooves. The average interval is an average value when the interval is arbitrarily measured at 10 points in the contact portion.
前記溝の深さは、複数の溝において均一であってもよいし、不均一であってもよい。
ここで、平均深さとは、前記当接部において前記溝の深さを任意に10箇所測定した際の平均値である。 The average depth of the groove is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 30 μm to 250 μm, and more preferably 45 μm to 210 μm.
The depth of the groove may be uniform or non-uniform in the plurality of grooves.
Here, the average depth is an average value when the depth of the groove is arbitrarily measured at 10 locations in the contact portion.
ここで、平均幅とは、前記当接部において前記溝の幅を任意に10箇所測定した際の平均値である。 The average width of the groove is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include 10 μm to 100 μm.
Here, the average width is an average value when the width of the groove is arbitrarily measured at ten locations in the contact portion.
前記太陽電池セルとしては、特に制限はなく、目的に応じて適宜選択することができ、例えば、薄膜系太陽電池セル、結晶系太陽電池セルなどが挙げられる。
前記太陽電池セルとしては、バスバーレス構造の太陽電池セルが好ましい。 << Solar cell >>
There is no restriction | limiting in particular as said solar cell, According to the objective, it can select suitably, For example, a thin film type solar cell, a crystalline solar cell, etc. are mentioned.
As the solar cell, a solar cell having a bus bar-less structure is preferable.
前記薄膜系太陽電池セルとしては、例えば、非晶質シリコン太陽電池セル、CdS/CdTe太陽電池セル、色素増感太陽電池セル、有機薄膜太陽電池セル、微結晶シリコン太陽電池セル(タンデム型太陽電池セル)などが挙げられる。 Examples of the crystalline solar battery cell include a single crystal silicon solar battery cell and a polycrystalline silicon solar battery cell.
Examples of the thin film solar cell include an amorphous silicon solar cell, a CdS / CdTe solar cell, a dye-sensitized solar cell, an organic thin film solar cell, a microcrystalline silicon solar cell (tandem solar cell). Cell).
前記フィンガー電極は、通常、前記太陽電池セルの受光面となる表面にAgペーストがスクリーン印刷等により塗布された後、焼成されることにより形成される。また、前記フィンガー電極は、受光面の全面に亘って、例えば、50μm~200μmの幅を有するラインが、所定間隔、例えば、2mmおきに、ほぼ平行に複数形成される。 The solar battery cell has a finger electrode as a collecting electrode.
The finger electrodes are usually formed by baking after the Ag paste is applied to the surface to be the light receiving surface of the solar cell by screen printing or the like. In the finger electrode, a plurality of lines having a width of, for example, 50 μm to 200 μm are formed substantially in parallel at a predetermined interval, for example, every 2 mm, over the entire light receiving surface.
前記光電変換素子の受光面と反対の裏面側には、例えば、アルミニウム又は銀からなる裏面電極が設けられている。前記裏面電極は、例えば、スクリーン印刷、スパッタ等により前記太陽電池セルの裏面に形成される。 The solar battery cell has a photoelectric conversion element.
On the back side opposite to the light receiving surface of the photoelectric conversion element, for example, a back electrode made of aluminum or silver is provided. The back electrode is formed on the back surface of the solar cell by, for example, screen printing, sputtering, or the like.
前記ホルダとしては、前記電流測定端子及び前記電圧測定端子を並列して保持するホルダであれば、特に制限はなく、目的に応じて適宜選択することができる。 <Holder>
The holder is not particularly limited as long as it is a holder that holds the current measurement terminal and the voltage measurement terminal in parallel, and can be appropriately selected according to the purpose.
矩形の前記ホルダにおいて、前記ホルダの上下面は、例えば、太陽電池セルの一辺の長さに相当する長辺と、前記電流測定端子及び前記電圧測定端子を並列する際の幅に相当する短辺とからなる。前記ホルダには、例えば、上下面間に亘って、複数の前記プローブピンが、前記電流測定端子及び前記電圧測定端子を構成する所定の配列で埋め込まれている。 There is no restriction | limiting in particular as a shape of the said holder, According to the objective, it can select suitably, For example, a rectangle etc. are mentioned.
In the rectangular holder, the upper and lower surfaces of the holder are, for example, a long side corresponding to the length of one side of the solar battery cell, and a short side corresponding to the width when the current measuring terminal and the voltage measuring terminal are arranged in parallel. It consists of. In the holder, for example, a plurality of probe pins are embedded in a predetermined arrangement constituting the current measurement terminal and the voltage measurement terminal across the upper and lower surfaces.
本発明の太陽電池セルの出力測定方法は、配置工程と、測定工程とを含み、更に必要に応じて、その他の工程を含む。 (Solar cell output measurement method)
The output measuring method of the solar battery cell of the present invention includes an arrangement step and a measurement step, and further includes other steps as necessary.
前記配置工程としては、本発明の前記太陽電池セル用出力測定治具の前記電流測定端子と前記電圧測定端子とを前記太陽電池セルの前記フィンガー電極上に配置する工程であれば、特に制限はなく、目的に応じて適宜選択することができる。 <Arrangement process>
The arrangement step is particularly limited as long as it is a step of arranging the current measurement terminal and the voltage measurement terminal of the solar cell output measurement jig of the present invention on the finger electrode of the solar cell. And can be appropriately selected according to the purpose.
前記測定工程としては、前記太陽電池セルの表面に光を照射しながら、前記太陽電池セルの電気的特性を測定する工程であれば、特に制限はなく、目的に応じて適宜選択することができる。
前記電気的特性としては、例えば、I-V特性などが挙げられる。 <Measurement process>
The measurement step is not particularly limited as long as it is a step of measuring the electrical characteristics of the solar cell while irradiating light on the surface of the solar cell, and can be appropriately selected according to the purpose. .
Examples of the electrical characteristics include IV characteristics.
太陽電池セル用出力測定治具1は、図7、及び図8に示すように、太陽電池セル2の表面に形成された表面電極3に当接される複数のプローブピン4と、プローブピン4を保持するホルダ5とを備える。そして、太陽電池セル用出力測定治具1は、複数のプローブピン4が配列することにより電流測定端子6を構成し、また、複数のプローブピン4が配列することにより電圧測定端子7を構成する。 [First Output Jig for Solar Cell]
As shown in FIGS. 7 and 8, the solar cell
プローブピン4の当接部4bの表面には、溝が形成されている。 Each
A groove is formed on the surface of the
電流測定端子6及び電圧測定端子7は、図8、及び図9に示すように、ホルダ5の下面5bに、互いに並列して設けられている。また、電流測定端子6及び電圧測定端子7は、ともにホルダ5の下面5bの長辺方向に沿って直線状に形成されている。電流測定端子6及び電圧測定端子7を構成する各プローブピン4は、当接部4bが直径3.5mmの円柱状をなし、隣接する当接部4bとの間隙S1が、一般的なフィンガー電極の間隔よりも短い0.1mmとされている。 [[Linear arrangement]]
As shown in FIGS. 8 and 9, the current measuring
また、太陽電池セル用出力測定治具1は、図10に示すように、電流測定端子6及び電圧測定端子7を、ともにホルダ5の下面5bの長辺方向に沿ってジグザグに形成してもよい。電流測定端子6及び電圧測定端子7は、各列のプローブピン4をジグザグに配列させることにより、それぞれ隣接するプローブピン4の当接部4b同士を、配列方向と直交する方向に一部オーバーラップさせることができる。すなわち、電流測定端子6は、プローブピン4がホルダ5の下面5bの長辺方向に沿ってジグザグに配列されるとともに、配列方向と直交するホルダ5の下面5bの幅方向から見て、隣接するプローブピン4の当接部4bの一部が重なるように配列されている。電圧測定端子7も、同様に構成されている。なお隣接するプローブピン4の当接部4b同士の間隔S3は、例えば、0.1mmと近接して配列されている。 [Zigzag array]
In addition, as shown in FIG. 10, the solar cell
次いで、太陽電池セル用出力測定治具1を用いた太陽電池セル2の電気的特性の測定工程について説明する。 [Method for measuring the output of solar cells]
Next, the measurement process of the electrical characteristics of the
本実施例に用いたバスバーレス構造の太陽電池セル2は、6インチの単結晶シリコン光電変換素子を有し、受光面側には、幅80μm、高さ20μm~30μmのフィンガー電極3aが2mm間隔で複数形成され、裏面側にはAg電極が全面に亘って形成されている。なお、フィンガー電極は、銀ペーストを用いたスクリーン印刷により形成されている。 (Bus barless structure solar cells)
The
先端が円形(直径1.5mm)になっているプローブピンの接触面に、切削加工で、同心円状に角度60°、平均深さが45μm、同心円における隣接する円の平均間隔(平均ピッチ)が60μmの溝を形成した(図17A及び図17B)。 (Example 1)
The contact surface of the probe pin whose tip is circular (diameter: 1.5 mm) is cut into a concentric angle of 60 °, the average depth is 45 μm, and the average interval (average pitch) between adjacent circles in the concentric circle is A 60 μm groove was formed (FIGS. 17A and 17B).
結束された片方の列が電流測定端子、もう一方の列が電圧測定端子である。これら端子をソーラーシミュレータに接続して使用した。 The probe pins in which the grooves were formed were embedded in a resin material (holder) and fixed so as to be arranged in a zigzag manner as shown in FIG. The base portions (socket portions) of the probe pins arranged in this way were bound to each other by being soldered to a copper wire to produce a solar cell output measuring jig.
One of the bound rows is a current measurement terminal, and the other row is a voltage measurement terminal. These terminals were used by connecting to a solar simulator.
実施例1において、プローブピン4の溝の、同心円における隣接する円の平均間隔(平均ピッチ)を120μmとした以外は、実施例1と同様にして、太陽電池セル用出力測定治具を作製した。
なお、溝の平均深さは95μmとなった。 (Example 2)
In Example 1, a solar cell output measuring jig was produced in the same manner as in Example 1 except that the average interval (average pitch) between adjacent concentric circles in the groove of the
The average depth of the grooves was 95 μm.
実施例1において、プローブピン4の溝の、同心円における隣接する円の平均間隔(平均ピッチ)を250μmとした以外は、実施例1と同様にして、太陽電池セル用出力測定治具を作製した。
なお、溝の平均深さは210μmとなった。 (Example 3)
In Example 1, a solar cell output measuring jig was produced in the same manner as in Example 1 except that the average interval (average pitch) between adjacent concentric circles in the groove of the
The average depth of the grooves was 210 μm.
実施例1において、プローブピン4の当接部4bに溝を形成しなかった以外は、実施例1と同様にして、太陽電池セル用出力測定治具を作製した。 (Comparative Example 1)
In Example 1, a solar cell output measuring jig was produced in the same manner as in Example 1 except that the groove was not formed in the
得られた太陽電池セル用出力測定治具1を、図19に示すようにバスバーレス構造の太陽電池セル2に接触させ、プローブピンと、フィンガー電極との間の抵抗値を測定した。なお、1A電流印加時の抵抗値を測定した。
測定は、ソーラーシミュレーター(日清紡メカトロニクス社製、PVS1116i)を用いて、照度1,000W/m2、温度25℃、スペクトルAM1.5Gの条件(JIS C8913)にて行った。5回測定し、抵抗値の算術平均値と、標準偏差(σ)を求め、測定毎のバラツキがどの程度生じたかを検討した。測定結果を下記評価基準で評価した。
[評価基準]
○:比較例1の抵抗値の標準偏差(σ)の1/3以下。
△:比較例1の抵抗値の標準偏差(σ)以下、かつ1/3超。
×:比較例1よりも抵抗値の標準偏差(σ)が大きい。 <Evaluation>
The obtained solar cell
The measurement was performed using a solar simulator (manufactured by Nisshinbo Mechatronics, PVS1116i) under conditions of illuminance of 1,000 W / m 2 , temperature of 25 ° C., and spectrum AM of 1.5 G (JIS C8913). The measurement was performed five times, the arithmetic average value of the resistance value and the standard deviation (σ) were obtained, and the degree of variation for each measurement was examined. The measurement results were evaluated according to the following evaluation criteria.
[Evaluation criteria]
○: 1/3 or less of the standard deviation (σ) of the resistance value of Comparative Example 1.
(Triangle | delta): The standard deviation ((sigma)) or less of the resistance value of the comparative example 1 is more than 1/3.
X: The standard deviation (σ) of the resistance value is larger than that of Comparative Example 1.
特に、隣接する溝の平均間隔(平均ピッチ)が、40μm~150μmの場合(実施例1及び2)には、抵抗値のバラツキが非常に少なく(比較例の標準偏差(σ)が、比較例の1/3以下)であり、非常に優れていた。 The resistance measured when the probe pin contact portion has a plurality of grooves (Examples 1 to 3) compared to the case where the probe pin contact portion does not have a plurality of grooves (Comparative Example 1). It was confirmed that the value was low and there was little variation in resistance value, and more stable output measurement was possible.
In particular, when the average interval (average pitch) between adjacent grooves is 40 μm to 150 μm (Examples 1 and 2), the variation in resistance value is very small (the standard deviation (σ) of the comparative example is a comparative example). 1/3 or less), and was very excellent.
2 太陽電池セル
3 表面電極
3a フィンガー電極
4 プローブピン
4a ピン本体
4b 当接部
5 ホルダ
6 電流測定端子
7 電圧測定端子
8 電流計
9 電圧計
22 裏面電極
30 載置台 DESCRIPTION OF
Claims (6)
- 複数のプローブピンが配列されてなり、太陽電池セルの電流特性を測定する電流測定端子と、
複数のプローブピンが配列されてなり、前記太陽電池セルの電圧特性を測定する電圧測定端子と、
前記電流測定端子及び前記電圧測定端子を並列して保持するホルダとを有し、
前記電流測定端子の複数の前記プローブピン及び前記電圧測定端子の複数の前記プローブピンの各々において、前記太陽電池セルのフィンガー電極に接する当接部の表面が複数の溝を有することを特徴とする太陽電池セル用出力測定治具。 A plurality of probe pins are arranged, and a current measuring terminal for measuring the current characteristics of the solar battery cell,
A plurality of probe pins are arranged, and a voltage measuring terminal for measuring voltage characteristics of the solar battery cell;
A holder for holding the current measurement terminal and the voltage measurement terminal in parallel;
In each of the plurality of probe pins of the current measurement terminal and the plurality of probe pins of the voltage measurement terminal, the surface of the contact portion in contact with the finger electrode of the solar cell has a plurality of grooves. Output measurement jig for solar cells. - 複数の溝の形状が、直径の異なる複数の同心円である請求項1に記載の太陽電池セル用出力測定治具。 The output measuring jig for solar cells according to claim 1, wherein the shape of the plurality of grooves is a plurality of concentric circles having different diameters.
- 直径の異なる複数の同心円の溝において、隣接する溝の平均間隔が、30μm~300μmである請求項2に記載の太陽電池セル用出力測定治具。 3. The solar cell output measuring jig according to claim 2, wherein, in a plurality of concentric grooves having different diameters, an average interval between adjacent grooves is 30 μm to 300 μm.
- 溝の平均深さが、30μm~250μmである請求項1から3のいずれかに記載の太陽電池セル用出力測定治具。 4. The output measuring jig for solar cells according to claim 1, wherein the average depth of the grooves is 30 μm to 250 μm.
- 電流測定端子の複数のプローブピンが、ジグザグに配列されており、
電圧測定端子の複数のプローブピンが、ジグザグに配列されている請求項1から4のいずれかに記載の太陽電池セル用出力測定治具。 A plurality of probe pins of the current measurement terminal are arranged in a zigzag,
The solar cell output measuring jig according to any one of claims 1 to 4, wherein a plurality of probe pins of the voltage measuring terminal are arranged in a zigzag manner. - 請求項1から5のいずれかに記載の太陽電池セル用出力測定治具の電流測定端子と電圧測定端子とを太陽電池セルのフィンガー電極上に配置する配置工程と、
前記太陽電池セルの表面に光を照射しながら、前記太陽電池セルの電気的特性を測定する測定工程とを含むことを特徴とする太陽電池セルの出力測定方法。 An arrangement step of arranging the current measurement terminal and the voltage measurement terminal of the output measuring jig for a solar battery cell according to any one of claims 1 to 5 on a finger electrode of the solar battery cell,
And a measuring step of measuring electrical characteristics of the solar cell while irradiating the surface of the solar cell with light.
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DE112014005098.9T DE112014005098T5 (en) | 2013-11-08 | 2014-10-30 | Apparatus for measuring the power of a solar cell and method for measuring the power of a solar cell |
KR1020167014500A KR101814948B1 (en) | 2013-11-08 | 2014-10-30 | Solar cell output measurement tool and solar cell output measurement method |
CN201480061320.6A CN105706359B (en) | 2013-11-08 | 2014-10-30 | Solar battery cell measures the output assay method of fixture and solar battery cell with output |
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KR101801785B1 (en) | 2015-12-16 | 2017-11-28 | (재)구미전자정보기술원 | A performance test apparatus for both sides electricity generating solar cell |
FR3143914A1 (en) * | 2022-12-20 | 2024-06-21 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | METHOD FOR ELECTRICAL CHARACTERIZATION OF AN ABSORBER MATERIAL UNDER VARIABLE ILLUMINATION |
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DE102017125626A1 (en) * | 2017-11-02 | 2019-05-02 | Hanwha Q Cells Gmbh | Contacting element and device for temporarily contacting a solar cell |
CN112367050B (en) * | 2020-10-10 | 2023-11-03 | 天合光能股份有限公司 | Electrical performance test method suitable for large-size solar cell |
JP2023022433A (en) * | 2021-08-03 | 2023-02-15 | 住友電気工業株式会社 | Probe, probe device, and inspection method |
CN114325099A (en) * | 2021-11-29 | 2022-04-12 | 无锡极电光能科技有限公司 | Thin-film solar cell insulated wire resistance online testing device and method |
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CN105706359B (en) | 2018-05-29 |
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CN105706359A (en) | 2016-06-22 |
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