JP2012231006A - Evaluation device and evaluation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an evaluation device and an evaluation method, capable of evaluating an electric characteristic of a portion of a solar battery cell with a simple configuration.SOLUTION: The evaluation device for evaluating the electric characteristic of the solar battery cell includes: a plurality of mutually insulated first connection terminals for respectively connecting different connection points of the solar battery cell to a current measurement circuit; a second connection terminal for connecting the solar battery cell to a voltage measurement circuit; and a switchover mechanism for selecting at least two first connection terminals out of the plurality of first connection terminals to switch connection points of the solar cell battery, and for connecting the current measurement circuit to the solar battery cell in series, through the at least two first connection terminals.

Description

  The present invention relates to an evaluation apparatus and an evaluation method.

  During the production of solar cells, it is an unavoidable phenomenon that a defective product is generated due to a silicon substrate as a raw material or a process. A commonly used method for determining whether or not a defective product is to measure the electrical characteristics of solar cells. When measuring the electrical characteristics, the voltage measurement terminal and the current measurement terminal are connected, and the solar cell is irradiated with pseudo-sunlight for measurement. However, where the defects of solar cells occur in the surface is accidental, and the measurement method that irradiates pseudo solar light on the entire surface of the solar cells identifies the position where the defects are generated It is impossible to do.

  On the other hand, in Patent Document 1, in a solar cell evaluation apparatus, a light spot reflected from a partial illumination light source by a y-axis direction scanning mirror and an x-axis direction scanning mirror and irradiated on the solar cell is expressed as a y-axis direction scanning mirror. And scanning the solar cell by rotating the x-axis direction scanning mirror and measuring the current of the solar cell for each position of the light spot on the solar cell. Thereby, according to patent document 1, the light / electrical conversion efficiency distribution of a solar cell can be obtained by measuring the light / electrical conversion efficiency of a solar cell for every irradiation position of partial illumination, It is said that the defect position of the solar cell can be detected from the electrical conversion efficiency distribution.

JP 2009-11115 A

  In the technique described in Patent Document 1, in order to change the irradiation position of the partial illumination, a robot that drives the solar battery in the horizontal direction and a scanning drive mechanism that rotates the mirror are configured. In order to realize these mechanisms, the evaluation apparatus tends to be enlarged as a whole.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the evaluation apparatus and evaluation method which can evaluate the electrical property of the one part location in a photovoltaic cell with simple structure.

  In order to solve the above-described problems and achieve the object, an evaluation apparatus according to one aspect of the present invention is an evaluation apparatus for evaluating electrical characteristics of solar cells, and is insulated from each other, A plurality of first connection terminals that respectively connect different connection locations and current measurement circuits in the solar battery cell, a second connection terminal that connects the solar battery cell and the voltage measurement circuit, and a connection in the solar battery cell At least two first connection terminals are selected from the plurality of first connection terminals so as to switch locations, and the current measurement circuit is connected in series to the solar battery cell via the at least two first connection terminals. And a switching mechanism to be connected to the device.

  According to the present invention, the connection terminal for measuring the electrical characteristics of the entire solar battery cell and the connection terminal for measuring the electrical characteristics of a part of the solar battery cell can be made the same. It is. Thereby, the electrical property of the one part location in a photovoltaic cell can be evaluated with a simple structure.

FIG. 1 is a diagram illustrating a configuration of the evaluation apparatus according to the first embodiment. FIG. 2 is a diagram showing a configuration of the solar battery cell in the first embodiment. FIG. 3 is a diagram illustrating a configuration of the evaluation apparatus according to the first embodiment. FIG. 4 is a diagram illustrating an operation of the evaluation apparatus according to the first embodiment. FIG. 5 is a flowchart of the operation of the evaluation apparatus according to the first embodiment. FIG. 6 is a diagram for explaining the operation of the evaluation apparatus when specifying a defective portion of the solar battery cell in the first embodiment. FIG. 7 is a diagram showing a current-voltage characteristic evaluated when a defective portion of the solar battery cell in the first embodiment is specified. FIG. 8 is a diagram for explaining the operation of the evaluation device when detecting disconnection failure of the solar battery cell in the first embodiment. FIG. 9 is a cross-sectional view showing the configuration of the back electrode of the solar battery cell in the first embodiment. FIG. 10 is a diagram for explaining the operation of the evaluation apparatus when measuring the electrical resistance of the alloy part between the back electrodes of the solar battery cell in the first embodiment. FIG. 11 is a diagram illustrating a configuration of the evaluation apparatus according to the second embodiment. FIG. 12 is a diagram showing a configuration of a connection plate in the second embodiment.

  Embodiments of an evaluation apparatus according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
An evaluation apparatus 100 according to the first embodiment will be described.

  The evaluation apparatus 100 is an apparatus for performing evaluation (inspection) of the electrical characteristics of the whole or a part of the solar battery cell 10 or performing a failure analysis such as a defect of a part of the solar battery cell 10. It is.

  FIG. 1 is a circuit diagram showing connections between solar cells 10 to be evaluated, a current measurement circuit 34 and a voltage measurement circuit 35. When measuring the electrical characteristics (for example, IV characteristics) of the solar battery cell 10, a bias voltage is applied to the solar battery cell 10 from the direct-current variable power source 33 in a state where, for example, the artificial sunlight 1 is irradiated, and this bias is applied. While the voltage is swept by the DC variable power supply 33, the current value and the voltage value at that time are measured by the current measurement circuit 34 and the voltage measurement circuit 35, respectively. The current measurement circuit 34 is connected in series to a current path that connects the DC variable power supply 33 and the solar battery cell 10. The current measurement circuit 34 is, for example, an ammeter. The voltage measurement circuit 35 is connected in parallel to both ends of the solar battery cell 10 in the current path connecting the DC variable power source 33 and the solar battery cell 10. The voltage measurement circuit 35 is, for example, a voltmeter.

  The substrate of the solar battery cell 10 to be measured has, for example, a light receiving surface 21 that should receive the pseudo sunlight 1 and a back surface 24 opposite to the light receiving surface 21. The vicinity of the light receiving surface 21 in the substrate (for example, formed of a semiconductor such as silicon) of the solar battery cell 10 is formed of, for example, an n-type semiconductor. The back surface 24 vicinity in the board | substrate of the photovoltaic cell 10 is formed with the p-type semiconductor, for example.

  At this time, as shown in FIG. 2A, a plurality of fine wire electrodes 22 and a plurality of bus bar electrodes 23-1 and 23-2 are arranged on the light receiving surface 21. The plurality of thin wire electrodes 22 are arranged side by side (for example, in parallel) at a predetermined interval so as not to prevent the pseudo sunlight 1 from being received into the solar battery cell 10 as much as possible. In addition, the plurality of thin wire electrodes 22 collects the power generated in the solar battery cell 10 and transmits the power to the bus bar electrodes 23-1 and 23-2 (for example, Extending at right angles. The plurality of bus bar electrodes 23-1, 23-2 are arranged side by side (for example, in parallel). Each bus bar electrode 23-1, 23-2 extends so as to intersect with the thin wire electrode 22 (for example, at a right angle).

  Further, as shown in FIG. 2B, the electrode 25 is disposed on the entire back surface 24. For example, as will be described later, a plurality of types of metals may be used for the electrode 25 in order to reduce the material cost.

  When the electrical characteristics of the solar battery cell 10 are measured by the evaluation apparatus 100, a plurality of probe jigs 20-1 to 20-4 are attached to the electrodes on the light receiving surface 21 and the back surface 24 as shown in FIG. One connection terminal 31a-1 to 31d-4 and a plurality of second connection terminals 32-1 to 32-4 are brought into contact with the solar battery cell 10 so as to be sandwiched from above and below, and a current measuring circuit 34 and a DC variable power source 33 Each is connected to a voltage measurement circuit 35. At this time, the main bodies 27-1 and 27-2 of the probe jigs 20-1 and 20-2 positioned on the light receiving surface 21 side need to have an elongated shape so as not to disturb the irradiation of the simulated sunlight 1 as much as possible. As a perspective view when connected, the shape is as shown in FIG. The main bodies 27-3 and 27-4 of the probe jigs 20-3 and 20-4 positioned on the back surface 24 side may have the same shape.

  Next, details of the probe jigs 20-1 to 20-4 will be described.

  As shown in FIG. 3, each of the probe jigs 20-1 to 20-4 includes a main body 27-1 to 27-4, a plurality of first connection terminals 31 a-1 to 31 d-4, and a second connection terminal 32. -1 to 32-4. The plurality of first connection terminals 31a-1 to 31d-4 and the second connection terminals 32-1 to 32-4 are, for example, at predetermined intervals along the longitudinal direction of the main bodies 27-1 to 27-4 ( (For example, in parallel).

  The main bodies 27-1 to 27-4 have an elongated shape corresponding to the bus bar electrodes 23-1, 23-2. The main bodies 27-1 to 27-4 are penetrated by a plurality of first connection terminals 31a-1 to 31d-4 and second connection terminals 32-1 to 32-4. The main bodies 27-1 to 27-4 are formed of, for example, an insulator. Thereby, the main bodies 27-1 to 27-4 hold the connection terminals while ensuring the insulation between the connection terminals.

  The plurality of first connection terminals 31a-1 to 31d-4 are insulated from each other through the main bodies 27-1 to 27-4. The plurality of first connection terminals 31a-1 to 31d-4 connect different connection points in the solar battery cell 10 and the current measurement circuit 34, respectively. For each of the first connection terminals 31a-1 to 31d-4, for example, a contact mechanism such as a spring probe is used. Each first connection terminal 31a-1 to 31d-4 is formed of, for example, a conductor.

  The plurality of first connection terminals 31a-1 to 31d-4 include a plurality of light receiving surface side connection terminals 31a-1 to 31d-2 and a plurality of back surface side connection terminals 31a-3 to 31d-4. The plurality of light receiving surface side connection terminals 31 a-1 to 31 d-2 connect different connection locations on the light receiving surface 21 of the solar battery cell 10 to the DC variable power source 33 and the current measurement circuit 34. The plurality of back surface side connection terminals 31 a-3 to 31 d-4 connect different connection points on the back surface 24 of the solar battery cell 10 to the DC variable power source 33 and the current measurement circuit 34.

  The second connection terminals 32-1 to 32-4 connect the solar battery cell 10 and the voltage measurement circuit 35. For example, the second connection terminals 32-1 to 32-4 are arranged between the plurality of first connection terminals 31a-1 to 31d-4. For the second connection terminals 32-1 to 32-4, for example, a contact mechanism such as a spring probe is used. The second connection terminals 32-1 to 32-4 are made of, for example, a conductor. When a plurality of second connection terminals 32-1 and 32-2 are arranged on the light receiving surface 21 side, all are short-circuited. In addition, when a plurality of second connection terminals 32-3 and 32-4 are arranged on the back surface 24 side, all are short-circuited.

  Which of the first connection terminals 31a-1 to 31d-4 is connected to the DC variable power supply 33 and the current measurement circuit 34 is switched by the switching relays 36-1 to 36-4. For example, the switching relays 36-1 to 36-4 select two connection terminals from the plurality of first connection terminals 31 a-1 to 31 d-4 so as to switch the connection location in the solar battery cell 10, and The direct-current variable power supply 33 and the current measurement circuit 34 are connected to the solar battery cell 10 in series via one connection terminal. Moreover, the switching relays 36-5 and 36-6 connect the voltage measurement circuit 35 to the solar battery cell 10 in parallel via the second connection terminals 32-1 to 32-4.

  The switching relays 36-1 to 36-4 are, for example, the light receiving surface side connection terminals in the plurality of light receiving surface side connection terminals 31 a-1 to 31 d-2 and the plurality of back surface side connection terminals 31 a-3 to 31 d-4. A back surface side connection terminal is selected, and the variable DC power supply 33 and the current measurement circuit 34 are connected in series to the solar battery cell 10 through the selected light receiving surface side connection terminal and the selected back surface side connection terminal.

  Next, the relationship between the measurement of the electrical characteristics of the solar battery cell 10 and the method for identifying the defective portion and the means thereof will be described with reference to FIG. FIG. 5 is a flowchart showing the operation of the evaluation apparatus 100.

  First, the switching relays 36-1 to 36-4 connect the DC variable power supply 33 and the current measurement circuit 34 in series to the solar battery cell 10 through all of the plurality of first connection terminals 31 a-1 to 31 d-4. (Step S1). Moreover, the switching relays 36-5 and 36-6 connect the voltage measurement circuit 35 to the solar battery cell 10 in parallel via the second connection terminals 32-1 to 32-4.

  Next, the evaluation apparatus 100 irradiates the solar cell 10 with the simulated sunlight 1. In this state, the evaluation apparatus 100 performs the IV measurement of the solar battery cell 10 using the current measurement circuit 34 and the voltage measurement circuit 35 (step S2).

  Then, the evaluation apparatus 100 determines whether or not a predetermined electrical characteristic is obtained according to the result of the IV measurement (step S3). The evaluation apparatus 100 determines that the inspection is acceptable for the solar battery cell 10 when the prescribed electrical characteristics are obtained (step S4). On the other hand, when the prescribed electrical characteristics are not obtained, the evaluation device 100 switches the switching relays 36-1 to 36-6 between opening and closing as shown in FIG. Change the connection location of. That is, the switching relays 36-1 to 36-4 are two connection terminals that are not selected from the plurality of first connection terminals 31 a-1 to 31 d-4, for example, two first connection terminals 31 b-1 and 31 b-3. And the DC variable power supply 33 and the current measurement circuit 34 are connected in series to the solar battery cell 10 via the two first connection terminals 31b-1 and 31b-3 (step S5).

  Then, the evaluation apparatus 100 irradiates the solar cell 10 with the simulated sunlight 1. In this state, the evaluation apparatus 100 performs IV measurement of the solar battery cell 10 using the current measurement circuit 34 and the voltage measurement circuit 35 (step S6).

  The evaluation apparatus 100 repeats the measurement operations of step S5 and step S6 until completion for all of the plurality of first connection terminals 31a-1 to 31d-4 (step S7).

  By performing such a measurement operation, when there is a defective portion 51 interposed inside the substrate of the solar battery cell 10 as shown in FIG. 6A, the defective portion 51 becomes an electric resistance component. Therefore, when the first connection terminal 31d-1 is connected to a connection location close to the defect location 51, the generated current from the portion without the defect is likely to be lost and flow at the defect location 51 (see arrow 52). Therefore, the defective portion 51 affects the IV characteristics. The IV characteristic of the solar battery cell 10 in this case is, for example, an IV waveform 111 indicated by a solid line in FIG.

  On the other hand, when the first connection terminal 31a-1 is connected to a connection location away from the defect location 51 as shown in FIG. (See arrow 52), the influence of the defective portion 51 on the IV characteristics is reduced. The IV characteristic of the solar battery cell 10 in this case is an IV waveform 112 indicated by a broken line in FIG. That is, as the IV characteristic of the solar battery cell 10, a decrease that changes from the IV waveform 111 to the IV waveform 112 is obtained. At this time, the output Pmax and the fill factor, which are part of the electrical characteristics of the solar battery cell 10, change, and the material becomes a material for specifying the location of the defective portion 51 (step S8).

  Further, an example of a defect in manufacturing the solar battery cell 10 is a disconnection of the thin wire electrode 22 in FIG. The thin wire electrode 22 and the bus bar electrode 23 are printed on the substrate of the solar battery cell 10 by screen printing or the like. However, if there is a defect in the process process, a defect such as not being printed in a desired pattern occurs. When such a defect occurs, the electric resistance increases because the current flowing through the current measuring circuit 34 flows around the disconnection portion 61 as shown in FIG. 8B. In order to detect this defect, for example, the voltage measurement circuit 35 measures the voltage while selecting two first connection terminals 31 c-1 and 31 c-4 and flowing an arbitrary current through the DC variable power source 33. When the electrical resistance is evaluated (see FIG. 8A), the voltage measuring circuit 35 is selected while the two first connection terminals 31d-1 and 31d-4 are selected and an arbitrary current is passed through the DC variable power source 33. The measurement result is compared with the case where the electrical resistance is evaluated by measuring the voltage (see FIG. 8B). If the evaluation results of the electrical resistances of the two are different by a predetermined threshold value or more, the disconnection point 61 can be detected (step S8).

  In addition, when the evaluation apparatus in which the connection configuration is changed so that the switching relay 36-2 and the switching relay 36-4 are replaced in the evaluation apparatus 100 illustrated in FIG. 3, two first connection terminals 31c-1 are used. , 31c-2 is selected and the voltage measurement circuit 35 performs voltage measurement while flowing an arbitrary current through the DC variable power supply 33 (see FIG. 8A), and the two first When the connection terminals 31d-1 and 31d-2 are selected and a voltage is measured by the voltage measurement circuit 35 while an arbitrary current is passed through the DC variable power supply 33, the electrical resistance is evaluated (see FIG. 8B). Compare the measurement results.

  In addition, when electrodes 251 and 252 using a plurality of types of materials (a plurality of types of conductors) are arranged on the electrode 25 on the back surface 24 shown in FIG. 2B, the electrodes as shown in FIG. The result of the part (alloy part) 253 connecting the 251 and 252 is influenced by the process. At this time, if the bonding of the alloy portion 253 is not well formed, the electric resistance value becomes high, and as a result, the generated power is lost. In order to analyze such a failure of the alloy portion 253, two first connection terminals 31a-3 and 31b-1 are respectively connected to electrodes 252 and 251 of different materials arranged on the back surface 24 as shown in FIG. In this state, the electric resistance between the two electrodes 252 and 251 is measured by measuring the voltage while flowing an arbitrary current with the DC variable power source 33. At this time, switching of which electrode is brought into contact with the voltage measuring circuit 35 is performed by switching of the switching relays 36-1 to 36-6 as shown in FIG. If the electrical resistance between the electrodes 252 and 251 is equal to or greater than a predetermined threshold, it can be specified that the alloy portion 253 is not well formed (step S8).

  In addition, when the evaluation apparatus in which the connection configuration is changed so that a part of the switching relay 36-1 and a part of the switching relay 36-3 are replaced in the evaluation apparatus 100 illustrated in FIG. 3 is illustrated in FIG. Thus, two first connection terminals 31 a-3 and 31 b-3 are brought into contact with the electrodes 252 and 251, respectively, and voltage measurement is performed while flowing an arbitrary current in the DC variable power supply 33 in this state. The electrical resistance between the electrodes 252 and 251 is measured.

  As described above, in the first embodiment, the switching relays 36-1 to 36-6 select all of the plurality of first connection terminals and connect the current measurement circuit 34 to the solar battery cell 10 in series. Then, the electrical characteristics of the entire solar battery cell 10 are measured. Further, the switching relays 36-1 to 36-6 select two first connection terminals from the plurality of first connection terminals, and the current measurement circuit 34 is connected to the solar cell 10 through the two first connection terminals. The defective part etc. of the photovoltaic cell 10 are specified in the state connected in series. Thereby, the connection terminal for irradiating pseudo solar light to the whole photovoltaic cell 10 and measuring an electrical property and the connection terminal for measuring the electrical property of the one part location of the photovoltaic cell 10 are the same. Therefore, the apparatus can be configured without using a driving mechanism that is necessary when partial illumination is used. That is, the electrical characteristics of a part of the solar battery cell 10 can be evaluated with a simple configuration.

  For example, as shown in FIGS. 6A and 6B, the switching relays 36-1 to 36-6 are connected to the solar battery cell 10 so as to identify the defective part 51 in the solar battery cell 10. Switch. As a result, the IV characteristic when the first connection terminal is connected to the connection point close to the defective part 51 and the IV characteristic when the first connection terminal is connected to the connection part far from the defective part 51 are obtained. By comparing, it is possible to specify the location of the defective portion 51 interposed inside the substrate of the solar battery cell 10.

  Alternatively, for example, the switching relays 36-1 to 36-6 are solar cells as shown in FIGS. 8A and 8B, that is, so as to detect disconnection failure of the thin wire electrode 22 in the solar cell 10. 10 to switch the connection location. Accordingly, for example, the two first connection terminals 31d-1 and 31d-4 are selected, and the voltage measurement circuit 35 performs voltage measurement while flowing an arbitrary current through the DC variable power supply 33, thereby evaluating the electrical resistance. By comparing the measurement results with the case (see FIG. 8B), the disconnection point 61 can be detected.

  Alternatively, for example, as illustrated in FIG. 10, the switching relays 36-1 to 36-6 switch the connection location in the solar battery cell 10 so as to measure the electrical resistance of the alloy portion 253. Thereby, for example, if the electrical resistance between the electrodes 252 and 251 is equal to or greater than a predetermined threshold value, it can be determined that the bonding of the alloy portion 253 is not well formed. That is, according to Embodiment 1, the performance evaluation of the electrode part arrange | positioned at the photovoltaic cell which cannot be discovered with the method using partial illumination is also attained.

Embodiment 2. FIG.
An evaluation apparatus 200 according to the second embodiment will be described with reference to FIG. FIG. 11 is a diagram showing a connection method between the solar battery cell 10 to be evaluated and the measurement system in the evaluation apparatus 200. When measuring the electrical characteristics of the solar battery cell 10 in FIG. 11, the light receiving surface side probe jigs 20-1 and 20-2 connected to the light receiving surface 21 side and the back surface side connection connected to the back surface 24 side. Connection is made with the plate 202. A partition frame 2021 and a plurality of conductor portions 2022 as shown in FIG. The partition frame 2021 is formed of, for example, an insulator, and extends in a lattice shape so that the plurality of conductor portions 2022 are held while being separated from each other while maintaining insulation. Thereby, the plurality of conductor portions 2022 are insulated from each other.

  The plurality of conductor portions 2022 are respectively wired and connected to the current measurement circuit 34 and the voltage measurement circuit 35 via the switching relays 36-3 and 36-4 (see FIG. 3) similar to those in the first embodiment. Connected in series. By adopting this configuration, the same evaluation method as in the first embodiment can be implemented for the connection between the light receiving surface side probe jigs 20-1 and 20-2 and the back surface side connection plate 202 and the solar battery cell 10. It becomes possible. Further, in the case of the present embodiment, it is possible to reduce the accuracy of specifying a defective portion by reducing the size of each conductor portion 2022.

  In addition, the switching relay for switching the connection location of the some conductor part 2022 and the electric current measurement circuit 34 is replaced with the switching relays 36-3 and 36-4 similar to Embodiment 1, and from the some conductor part 2022. It may be such that at least two are selected two-dimensionally and connected to the current measurement circuit 34.

  As described above, the evaluation apparatus according to the present invention is useful for evaluating the electrical characteristics of solar cells.

DESCRIPTION OF SYMBOLS 1 Pseudo sunlight 10 Solar cell 20-1 to 20-4 Probe jig 21 Light-receiving surface 22 Thin wire electrode 23 Bus bar electrode 24 Back surface 25 Electrode 27-1 to 27-4 Main body 31a-1 to 31d-4 1st connection Terminals 32-1 to 32-4 Second connection terminal 33 DC variable power supply 34 Current measurement circuit 35 Voltage measurement circuit 36-1 to 36-6 Switching relay 51 Defect location 52 Current direction 61 Disconnection location 111 IV waveform 112 IV waveform 201 Probe jig 202 Connection plate 251 Electrode 252 Electrode 253 Alloy part 2021 Separating frame 2022 Conductor part

Claims (7)

An evaluation device for evaluating the electrical characteristics of solar cells,
A plurality of first connection terminals that are insulated from each other and respectively connect different connection locations and current measurement circuits in the solar cells;
A second connection terminal for connecting the solar battery cell and the voltage measurement circuit;
At least two first connection terminals are selected from the plurality of first connection terminals so as to switch connection points in the solar battery cell, and the current measurement circuit is connected via the at least two first connection terminals. A switching mechanism connected in series to the solar cells;
An evaluation apparatus comprising: The evaluation device according to claim 1, wherein the switching mechanism switches a connection location in the solar battery cell so as to identify a defective location in the solar battery cell. The evaluation device according to claim 1, wherein the switching mechanism switches a connection location in the solar battery cell so as to detect an electrode disconnection failure in the solar battery cell. The solar battery cell is
A first electrode formed of a first conductor;
A second electrode formed of a second conductor;
An alloy portion connecting the first electrode and the second electrode;
Have
The evaluation device according to claim 1, wherein the switching mechanism switches a connection location in the solar battery cell so as to measure an electrical resistance of the alloy part. The plurality of first connection terminals are:
A plurality of light receiving surface side connection terminals respectively connecting different connection locations and current measuring circuits on the light receiving surface of the solar cell,
A plurality of back side connection terminals for connecting different connection locations and current measurement circuits on the back side of the solar cell,
Have
The switching mechanism selects a light receiving surface side connection terminal in the plurality of light receiving surface side connection terminals and a back surface side connection terminal in the plurality of back surface side connection terminals, and selects the selected light receiving surface side connection terminal. The evaluation apparatus according to any one of claims 1 to 4, wherein the current measurement circuit is connected in series to the solar battery cell via a back surface side connection terminal. The plurality of back surface side connection terminals include a plurality of conductor portions that are separated from each other by a grid-like insulator in a plate disposed on the back surface side of the solar battery cell and insulated from each other. Evaluation device. A plurality of first connection terminals that are insulated from each other and that connect different measurement points in the solar cell and the current measurement circuit, respectively, and a second connection terminal that connects the solar cell and the voltage measurement circuit Is an evaluation method for evaluating the electrical characteristics of solar cells,
At least two connection terminals are selected from the plurality of first connection terminals so as to switch connection points in the solar battery cells, and the current measurement circuit is serially connected to the solar battery cells via the at least two connection terminals. An evaluation method characterized by comprising a switching step of connecting to the device.

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