JP6233602B2 - SOLAR CELL MODULE MANUFACTURING METHOD AND SOLAR CELL MODULE MANUFACTURING SYSTEM - Google Patents

Description

  The present invention relates to a solar cell module manufacturing method and a solar cell module manufacturing system.

  The solar cell module includes a plurality of solar cells connected by a wiring material, and a protective member such as a glass substrate that protects the solar cells (for example, see Patent Document 1). For example, the solar cells are ranked according to the output in the manufacturing process, and the plurality of solar cells constituting the module are selected from each rank according to the target output of the module. This selection is performed using the center value of the output width of each rank. That is, a plurality of solar cells are selected so that the module output calculated using the center value of each rank satisfies the target output.

JP 2011-049283 A

  However, in the solar cell manufacturing process, the manufacturing conditions are adjusted to obtain a target cell output, but the cell output varies due to differences in raw materials and fluctuations in conditions. Of course, even in the same lot product with the same raw material and production date, the cell output varies. For example, as shown in the output distribution illustrated in FIG. 8, the peak top of the output distribution exists in the range of rank C in the production lot a, while the peak top of the output distribution exists in the range of rank D in the production lot b. Exists.

  Therefore, when a solar battery cell is selected using the above center value, module outputs may vary and some of them do not satisfy the target output. Therefore, in order to suppress the generation of solar battery modules that do not satisfy the target output, it is necessary to select solar cells so that the output is slightly higher than the target output. For this reason, the usage amount of the solar cells located on the high output side in the output distribution increases, the inventory of the solar cells located on the high output side in the output distribution decreases, and the low output in the output distribution. The problem that the inventory of the photovoltaic cell located in the side increases occurs. When the inventory of solar cells of a specific rank increases, the solar cells of that rank must be disposed of.

  The method for manufacturing a solar cell module according to the present invention prepares a plurality of solar cells, measures the characteristic values of the solar cells, and puts the solar cells in a plurality of holders based on the measured characteristic values and target module characteristic values. A module unit, which is a bundle of a plurality of solar cells that satisfy the target module characteristic value when electrically connected by distribution and wiring material, is produced for each holder, and the plurality of solar cells constituting the module unit are electrically connected by wiring material. Connect.

  The solar cell module manufacturing system according to the present invention measures the characteristic value of the solar cell, distributes the solar cell to a plurality of holders based on the measured characteristic value and the target module characteristic value, and electrically uses the wiring material. A means for producing a module unit, which is a bundle of a plurality of solar cells satisfying a target module characteristic value when connected, for each holder, and a plurality of solar cells constituting the module unit are electrically connected by a wiring material. Means for producing a string.

  ADVANTAGE OF THE INVENTION According to this invention, the solar cell module which satisfy | fills target output can be manufactured efficiently.

It is the top view which looked at the solar cell module which is an example of embodiment which concerns on this invention from the light-receiving surface side. It is a figure which shows a part of XX sectional view of FIG. It is a figure for demonstrating the manufacturing system of the solar cell module which is an example of embodiment which concerns on this invention, and the manufacturing method of a solar cell module. It is a figure for demonstrating the manufacturing system of the solar cell module which is another example of embodiment which concerns on this invention, and the manufacturing method of a solar cell module. It is a figure for demonstrating the manufacturing system of the solar cell module which is another example of embodiment which concerns on this invention, and the manufacturing method of a solar cell module. It is a flowchart for demonstrating the manufacturing method of the solar cell module which is an example of embodiment which concerns on this invention. It is a figure which shows the output distribution of the solar cell module which is an example of embodiment which concerns on this invention. It is a figure which shows the output distribution of a solar cell.

The manufacturing method of the solar cell module 10 and the manufacturing system 50 of the solar cell module which are examples of the embodiment according to the present invention will be described in detail below with reference to the drawings, but the application of the present invention is not limited to this.
The drawings referred to in the embodiments are schematically described, and the dimensional ratios of the components drawn in the drawings may be different from the actual products. Specific dimensional ratios and the like should be determined in consideration of the following description.

  With reference to FIG.1 and FIG.2, the structure of the solar cell module 10 is demonstrated. FIG. 1 is a plan view of the solar cell module 10 as seen from the light receiving surface side. FIG. 2 is a cross-sectional view of the solar cell module 10 cut in the thickness direction along line XX in FIG.

  The solar cell module 10 includes a plurality of solar cells 11, a first protective member 12 disposed on the light receiving surface side of the solar cell 11, and a second protective member 13 disposed on the back surface side of the solar cell 11. Is provided. The plurality of solar cells 11 are sandwiched between the first protective member 12 and the second protective member 13 and are sealed with a filler 14. For the first protective member 12 and the second protective member 13, for example, a translucent member such as a glass substrate, a resin substrate, or a resin film can be used. The second protective member 13 may be, for example, a white member that does not have translucency. For the filler 14, for example, a resin such as ethylene vinyl acetate copolymer (EVA) can be used.

  The solar cell module 10 includes a wiring member 15 that connects a plurality of solar cells 11. The wiring member 15 bends in the thickness direction of the solar cell module 10 between the adjacent solar cells 11 and connects the solar cells 11 in series. Moreover, the solar cell module 10 includes a transition wiring member 16 that connects the wiring members 15, a frame 17 that is attached to the periphery of the first protective member 12 and the second protective member 13, a terminal box (not shown), and the like. A string 18 in which a plurality of solar cells 11 are connected in series is formed by the wiring member 15 and the transition wiring member 16.

  The solar cell 11 includes a photoelectric conversion unit 20 that generates carriers by receiving sunlight, a first electrode 30 that is a light receiving surface electrode formed on the light receiving surface, and a back surface formed on the back surface. And a second electrode 40 that is an electrode. In the solar battery cell 11, the carriers generated by the photoelectric conversion unit 20 are collected by the first electrode 30 and the second electrode 40, respectively. Here, the “light receiving surface” means a surface on which sunlight mainly enters from the outside of the solar battery cell 11, and the “back surface” means a surface opposite to the light receiving surface. For example, over 50% to 100% of the sunlight incident on the solar battery cell 11 is incident from the light receiving surface side.

  The photoelectric conversion unit 20 includes a substrate 21 made of a semiconductor material such as crystalline silicon (c-Si), gallium arsenide (GaAs), indium phosphide (InP), and an amorphous semiconductor formed on the light receiving surface of the substrate 21. A layer 22 and an amorphous semiconductor layer 23 formed on the back surface of the substrate 21 are included. As the substrate 21, an n-type single crystal silicon substrate is particularly suitable. The amorphous semiconductor layer 22 has a layer structure in which, for example, an i-type amorphous silicon layer and a p-type amorphous silicon layer are sequentially formed. The amorphous semiconductor layer 23 has a layer structure in which, for example, an i-type amorphous silicon layer and an n-type amorphous silicon layer are sequentially formed.

  The first electrode 30 has a transparent conductive layer 31 formed on the amorphous semiconductor layer 22 and a collector electrode 32 formed on the transparent conductive layer 31. Similarly to the first electrode 30, the second electrode 40 includes a transparent conductive layer 41 and a collecting electrode 42. In the case of the solar cell module 10 that generates power mainly using incident light from the light receiving surface, it is preferable that the collector electrode 42 be larger than the collector electrode 32 in the area of the collector electrode.

The transparent conductive layers 31 and 41 are made of, for example, a transparent conductive oxide obtained by doping metal oxide such as indium oxide (In ₂ O ₃ ) or zinc oxide (ZnO) with tin (Sn), antimony (Sb), or the like. Composed. The collector electrodes 32 and 42 have a structure in which conductive fillers are dispersed in a binder resin such as an epoxy resin, for example. As the conductive filler, metal particles such as silver (Ag), copper (Cu), nickel (Ni), carbon, or a mixture thereof can be used. Of these, Ag particles are preferred. Alternatively, the collector electrodes 32 and 42 may be metal plating electrodes formed by Ag or Cu plating.

  The collector electrodes 32 and 42 are preferably composed of a plurality of finger portions and a plurality of (for example, two or three) bus bar portions. The finger part is a thin line-like electrode formed over a wide range on the transparent conductive layers 31 and 41, and the bus bar part is an electrode that collects carriers from the finger electrode. In addition, the collector electrode 42 may be comprised from metal layers, such as Ag, instead of a finger part.

  A structure other than the above can be applied to the photoelectric conversion portion. For example, an i-type amorphous silicon layer and an n-type amorphous silicon layer are sequentially formed on the light-receiving surface side of a substrate made of n-type single crystal silicon or the like, and an i-type amorphous silicon layer is formed on the back surface side of the substrate. And a photoelectric conversion part in which a p-type region composed of a p-type amorphous silicon layer and an n-type region composed of an i-type amorphous silicon layer and an n-type amorphous silicon layer are formed. Good. In this case, electrodes (p-side electrode and n-side electrode) are provided only on the back side of the substrate. A photoelectric conversion unit including a substrate made of p-type polycrystalline silicon, an n-type diffusion layer formed on the light-receiving surface of the substrate, and an aluminum metal layer formed on the back surface of the substrate; Also good.

  An example of the manufacturing method of the solar cell module 10 will be described with reference to FIGS. 3-5 is a figure which shows the manufacturing process of the manufacturing system 50, 50x, 50y of the solar cell module, and the solar cell module 10. FIG. 4 and 6, the description of the control device 60 is omitted. FIG. 6 is a flowchart showing the manufacturing procedure of the solar cell module 10. FIG. 7 is a diagram showing the output distribution of the solar cell module 10.

  The solar cell module 10 can be manufactured using the manufacturing system 50. In the manufacturing process of the solar battery module 10, the characteristic value of the solar battery cell 11 is measured, and the solar battery cell 11 is distributed to a plurality of holders based on the measured characteristic value to produce a module unit. The module unit means a bundle of a plurality of solar cells 11 that satisfy a target module characteristic value when connected in series with the wiring member 15 and the transition wiring member 16. In the process described here (hereinafter referred to as “main process”), the maximum output Pmax (Maximum Power) is used as the characteristic value. Below, in order to distinguish Pmax of the photovoltaic cell 11 and Pmax of the solar cell module 10, the latter is called module Pmax.

  In the manufacturing system 50 illustrated in FIG. 3, the solar battery cell 11 manufactured by a manufacturing facility (not shown) is transferred to the selector device 51, and the characteristic value of the solar battery cell 11 is measured by the selector device 51. Then, the module unit G is produced based on the measured Pmax and the target module Pmax (target module Pmax).

  The manufacturing system 50 includes the selector device 51, a string producing device 52 that produces the string 18 using the module unit G, and a plurality of cassettes 53 as the holder for producing the module unit G. The cassette 53 is a holder that can accommodate and carry a predetermined number of solar cells 11 constituting the module unit G, for example. The module unit G is manufactured by automatically assigning a plurality of solar cells 11 to each cassette 53 by the selector device 51. The module unit G is transported to the string production device 52 in a state of being accommodated in each cassette 53, and the wiring material 15 or the like is attached to the string production device 52 to form the string 18.

  The manufacturing system 50 includes a control device 60 that integrally controls the operation of the system. The control device 60 includes a selector control unit 61 that controls the selector device 51, a string production control unit 62 that controls the string production device 52, and a storage unit 63 that stores information for producing the module unit G and the like. Examples of the information for producing the module unit G include a measured value of Pmax, a target module Pmax, a total of measured values of Pmax for each cassette 53, and the like. It is preferable that the measured value of Pmax and other characteristic values for each cassette 53 and the identification information given to the cassette 53 are stored in the storage unit 63 as a set. By performing management based on the identification information of the cassette 53, for example, the restarting operation after the production is temporarily stopped is facilitated, and the production can be easily changed when the target module Pmax is changed. If necessary, the number of solar cells 11 necessary for producing the module unit G (solar cell module 10) is used as the information. The characteristic values stored as the information may include open circuit voltage Voc, short circuit current Isc, fill factor FF, and the like. In addition to these databases, the storage unit 63 can store various arithmetic expressions, control programs, and the like.

  The selector control unit 61 has a function of controlling the selector device 51 and measuring Pmax of the solar battery cell 11. The selector control unit 61 has a function of distributing the solar cells 11 to the plurality of cassettes 53 based on the measured Pmax and the target module Pmax. More specifically, the measured value of Pmax of the solar cells 11 to be distributed (hereinafter sometimes referred to as “distribution target”), the target module Pmax read from the storage unit 63, and further the distribution target are to be allocated. The solar cells 11 are distributed by comparing with the total of the measured values of Pmax for each cassette 53 at the time (hereinafter sometimes referred to as “current time”). Such distribution is performed so that a module unit G is produced for each cassette 53, as will be described in detail later.

  The string production control unit 62 has a function of controlling the string production device 52 to connect a plurality of solar cells 11 constituting the module unit G in series with the wiring member 15 or the like. That is, the string production control unit 62 may use the module unit G stored in the cassette 53 as it is, and does not need to select the solar battery cell 11 while predicting the module Pmax.

  Although FIG. 3 shows one control device 60 that controls the entire manufacturing system 50 in an integrated manner, the functions of the control device 60 may be distributed among a plurality of hardware. Moreover, all the processes may be automatically performed by the function of the control device 60, or a part of this process may be manually performed.

In the manufacturing system 50x illustrated in FIG. 4, module units of a plurality of grades are produced. Here, it is assumed that three types of module units G1, G2, and G3 are manufactured in order to manufacture three types of solar cell modules having different modules Pmax. The manufacturing system 50x includes cassettes 53 _G1 , 53 _G2 , and 53 _G3 corresponding to the module units G1, G2, and G3. A plurality of cassettes 53 _G1 , 53 _G2 , 53 _G3 are preferably provided, and corresponding module units are produced in each of the various cassettes. In the string manufacturing device 52, the strings 18 _G1 , 18 _G2 , and 18 _G3 constituting the solar cell module 10 are formed using module units G 1, G 2, and G 3 including a plurality of solar cells 11 accommodated in one cassette 53. Produced. When the solar cell module 10 is manufactured using the module unit G1, a plurality of strings 18 _G1 are electrically connected using a manufacturing apparatus (not shown).

  In the manufacturing system 50 x, a plurality of target modules Pmax corresponding to each module unit, that is, each solar cell module, is stored in the storage unit 63. The selector control unit 61 reads the three target modules Pmax from the storage unit 63, and distributes the solar cells 11 to the respective cassettes in the same manner as in the manufacturing system 50.

The manufacturing system 50y illustrated in FIG. 5 is different from the manufacturing system 50x in that a transport line 54 capable of continuously transporting the solar cells 11 from the selector device 51 to the string production device 52 is provided instead of the cassette. Then, racks 55 _G1 , 55 _G2 , 55 _G3 incorporated in the string production device 52 are provided as holders for producing module units. A plurality of racks 55 _G1 , 55 _G2 , and 55 _G3 are preferably provided, and a module unit is produced for each rack. The manufacturing system 50y is particularly useful when the selector device 51 and the string manufacturing device 52 are arranged close to each other. By adopting a system in which the rack is automatically transported from the selector device 51 toward the string production device 52, damage to the solar cells 11 in the transport process can be reduced.

In the manufacturing system 50y, the solar cells 11 constituting each module unit G1, G2, G3 are transported to the string production device 52 with identification information for specifying a rack to be accommodated in the selector device 51, for example. Also good. Alternatively, the solar cells 11 may be transported by providing a plurality of transport lines 54 respectively connected to the racks 55 _G1 , 55 _G2 , 55 _G3 . In addition, the selector production device 51 attaches information about the measured value of Pmax to each solar cell 11 and transports the solar cell 11 to the string production device 52, and the string production device 52 based on the measurement value and the target module Pmax. You may distribute the photovoltaic cell 11 to each rack. At this time, as a method of attaching the identification information to the solar battery cell 11, a method of attaching an identification code to the solar battery cell 11 in advance and storing the identification code and the measured value of Pmax in the storage unit 63 as a set. It is preferable to use it. Instead of the transfer line 54, the solar cells 11 may be transferred from the selector device 51 to the string production device 52 using equipment such as a robot arm.

  As shown in FIG. 6, in the manufacturing process of the solar cell module 10, first, the photoelectric conversion unit 20 is manufactured (S10). Specifically, an amorphous semiconductor layer 22 including an i-type amorphous silicon layer and a p-type amorphous silicon layer is formed on the light-receiving surface of the substrate 21, and an i-type amorphous film is formed on the back surface of the substrate 21. The photoelectric conversion part 20 is manufactured by forming the amorphous semiconductor layer 23 including the silicon layer and the n-type amorphous silicon layer. The amorphous semiconductor layers 22 and 23 are formed by, for example, CVD or sputtering by placing the cleaned substrate 21 in a vacuum chamber.

For forming the i-type amorphous silicon layer by CVD, for example, a source gas obtained by diluting silane (SiH ₄ ) with hydrogen (H ₂ ) is used. In the case of a p-type amorphous silicon layer, a source gas diluted with hydrogen (H ₂ ) by adding diborane (B ₂ H ₆ ) to silane can be used. In the case of an n-type amorphous silicon layer, a source gas diluted with hydrogen (H ₂ ) by adding phosphine (PH ₃ ) to silane can be used.

  Then, the 1st electrode 30 and the 2nd electrode 40 are each formed on the photoelectric conversion part 20 manufactured by S10 (S11). Transparent conductive layers 31 and 41 are first formed on the amorphous semiconductor layers 22 and 23 of the photoelectric conversion unit 20 by CVD or the like, respectively. Then, collector electrodes 32 and 42 are formed on the transparent conductive layers 31 and 41 by screen printing or electrolytic plating, respectively. The solar battery cell 11 is manufactured by this process.

  The plurality of solar cells 11 manufactured in S11 are transported to the selector device 51, Pmax is measured, and distributed to the plurality of cassettes 53 based on the measured Pmax and the target module Pmax (S12, S13). Steps S12 and S13 are automatically executed by the function of the selector control unit 61.

  In S12, Pmax is measured as a characteristic value of the plurality of solar battery cells 11. At this time, the open circuit voltage Voc, the short circuit current Isc, the fill factor FF, and the like may be included as the measured characteristic values. This process is automatically executed by the function of the selector control unit 61. In this step, Pmax is measured for all the solar cells 11. Pmax can be measured in accordance with, for example, JIS C 8913.

  Subsequently, based on the Pmax measured in S12 and the target module Pmax, the solar cells 11 are distributed to a plurality of cassettes 53, and a module unit G is produced for each cassette 53 (S13). The module Pmax is preferably at least equal to or greater than the target module Pmax and approximate to the target module Pmax. In S <b> 13, when the solar cells 11 are sorted, the measured value of Pmax is counted for each cassette 53, and the total value is stored in the storage unit 63 as needed. Then, the target module Pmax stored in advance in the storage unit 63 and the total value of Pmax of the solar cells 11 accommodated in each cassette 53 are compared with the Pmax of the solar cells 11 measured at the present time. The solar battery cells 11 are distributed to any one of the cassettes 53. In S13, the average value and standard deviation of Pmax of each solar battery cell 11 may be calculated as needed, and the module unit G may be produced using the average value and standard deviation.

  In S13, a predetermined number of solar cells 11 smaller than the number constituting the module unit G are allocated to each cassette 53, and then added to each cassette 53 based on the total value of Pmax in each cassette 53. 11 can be determined. Specifically, a value obtained by subtracting the above total value from the target module Pmax, that is, a necessary remaining Pmax and a Pmax to be distributed are compared to determine a solar cell 11 to be added to each cassette 53, and a module unit The number of solar cells constituting G is selected. The target module Pmax may be set in consideration of a correlation coefficient described later.

  When the number of the solar battery cells 11 constituting the solar battery module 10 is 70, for example, the predetermined number can be 65, and the remaining 5 can adjust the module Pmax. Further, if the Pmax output distribution of the solar battery cell 11 is sharp, the predetermined number may be 69 (that is, the required number −1). Among the plurality of cassettes 53, for those in which the total value of the predetermined number of Pmax is lower than the other cassettes 53, it is preferable to preferentially distribute the solar cells 11 whose Pmax is higher than the average value as an additional part. . On the other hand, it is preferable to preferentially distribute the solar cells 11 whose Pmax is lower than the average value as an additional portion for the total value of the predetermined number Pmax higher than the other cassettes 53.

In S13, a plurality of types of module units can be manufactured in order to manufacture a plurality of grades of solar cell modules 10 with greatly different modules Pmax. In the case of producing a plurality of types of module units, it is preferable to set a distribution threshold value for the measured value of Pmax. Here, it is assumed that three types of module units are manufactured by the manufacturing system 50x. In this case, two threshold values are set such that the first threshold value <the second threshold value. For example, if Pmax to be distributed is less than the first threshold value, the distribution is preferentially distributed to the cassette 53 _G1 . If Pmax sorting target is less than the first threshold value or more second threshold distribution in the cassette 53 _G2 preferentially, Pmax sorting object dispatches preferentially to the cassette 53 _G3 If the second threshold value or more.

FIG. 7 is a diagram showing the output distribution of the module Pmax. The solar battery modules manufactured from the module units G1, G2, and G3 are shown by solid lines and using the center values of ranks A to G in FIG. Solar cell modules g1 and g2 (comparative examples) manufactured by selecting 11 are indicated by two-dot chain lines. G1, g1 is the target module Pmax and Pz _1, G2, g2 is the target module Pmax and Pz _2, G3 is to the target module Pmax and Pz _3. The plurality of solar cells constituting the solar cell modules g1 and g2 are selected from the ranks shown in FIG. 8 according to the target output of the module. This selection is performed using the center value of the output width of each rank, and a plurality of solar cells are selected so that the module output calculated using the center value of each rank satisfies the target output.
Pz ₁ and Pz ₃ may be the total Pmax of the selected plurality of solar cells 11, or the solar cell module 10 after the laminating process described later for the selected plurality of solar cells 11. Pmax in the state of When Pmax of the state of the solar cell module 10 is set to Pz ₁ and Pz ₃ , it is between the total Pmax of the selected plurality of solar cells 11 and the Pmax of the solar cell module 10 after the laminating step. Pz ₁ and Pz ₃ may be obtained using the correlation coefficient. For example, when Pmax in the state of the solar cell module 10 is larger than the total Pmax of the selected plurality of solar cells 11, the output value is smaller than Pmax in the state of the solar cell module 10 in consideration of the correlation coefficient. A plurality of solar cells 11 are selected. On the contrary, when Pmax in the state of the solar cell module 10 is smaller than the total Pmax of the selected plurality of solar cells 11, the output value is larger than Pmax in the state of the solar cell module 10 in consideration of the correlation coefficient. A plurality of solar cells 11 are selected as described above.

In the case of G1 and G2, the module Pmax can be accurately adjusted to the target value because it is manufactured using the actual measurement value of Pmax. For this reason, the standard deviation of the output distribution is small compared to the cases of g1 and g2, and the variation in output among the modules is small. The peaks of G1 and G2 are greatly shifted to the Pz ₁ and Pz ₂ sides than the peaks of g1 and g2. In other words, in this process, the module output can be accurately adjusted to the target value compared to the comparative example, so that a solar cell module that satisfies the target output can be obtained without giving a large margin to the module output. The generation of solar cell modules that do not satisfy the target output can be sufficiently prevented. Thereby, the usage amount of the photovoltaic cell located on the high output side in the output distribution in G1 and G2 can be suppressed, and the photovoltaic cell located on the high output side in the output distribution can be of higher output grade. It becomes possible to use for manufacture of G3.

  Subsequently, by using the module unit G manufactured in S13, the wiring member 15 and the like are connected to the plurality of solar cells 11 constituting the module unit G, and the string 18 in which each solar cell 11 is electrically connected is manufactured. (S14). This process is automatically executed by the function of the string production control unit 62. The wiring member 15 is attached to the collector electrodes 31 and 42 using, for example, an adhesive made of a film-like or paste-like thermosetting resin.

  Subsequently, the constituent members of the solar cell module 10 including the string 18 produced in S14 are stacked and thermocompression bonded (S15). This process is called a laminating process and is performed using a laminator (not shown). In the laminating step, the first resin constituting the filler 14 is laminated on the first protective member 12, and the string 18 is laminated on the first resin. Further, the second resin constituting the filler 14 is laminated on the string 18 and the second protective member 13 is laminated thereon. And it laminates by applying a pressure from the 2nd protection member 13 side, heating at the temperature which each resin melts. Thus, a structure in which the string 18 is sealed with the filler 14 is obtained. Finally, the frame 17 and the terminal box are attached, and the solar cell module 10 is manufactured.

  In this step, Pmax is used as the characteristic value, but the module unit G may be manufactured using a characteristic value other than Pmax. Specific examples of characteristic values other than Pmax include the fill factor FF, sheet resistance R, short circuit current Isc, open circuit voltage Voc, and the like of the solar cell 11.

  As mentioned above, according to the said manufacturing method, the target solar cell module 10 can be manufactured efficiently. According to the manufacturing method described above, the solar cell module 10 is manufactured using an actual measurement value such as Pmax, so that the use efficiency of the solar cells is high and it is easy to realize a production plan. It is also possible to manufacture a high-power grade solar cell module 10 using solar cells in which Pmax and the like are at the same level as before.

10, 10 _G solar cell module, 11 solar cell, 12 first protection member, 13 second protection member, 14 filler, 15 wiring material, 16 transition wiring material, 17 frame, 18, 18 _G1 , 18 _G2 , 18 _G3 string, 20 photoelectric conversion unit, 21 substrate, 22, 23 amorphous semiconductor layer, 30 first electrode, 31, 41 transparent conductive layer, 32, 42 collector electrode, 40 second electrode, 50 manufacturing system, 51 selector device , 52 string production device, 53, 53 _G1 , 53 _G2 , 53 _G3 cassette, 54 transport line, 55 _G1 , 55 _G2 , 55 _G3 rack, 60 control device, 61 selector control unit, 62 string production control unit, 63 storage unit , G, G1, G2, G3 Module units.

Claims (7)

Prepare multiple solar cells,
Measure the characteristic value of the solar cell,
Based on the measured characteristic value and target module characteristic value, the solar cells are distributed to a plurality of holders, and a bundle of a plurality of solar cells satisfying the target module characteristic value when electrically connected by a wiring material. Make a module unit for each holder,
Here, the module unit is produced by distributing a predetermined number of the solar cells, which is smaller than the number constituting the module unit, to the holders, and then the predetermined number of the characteristic values in the holders. It is performed by determining the solar cells to be added to each holder based on the total and the target module characteristic value,
The manufacturing method of the solar cell module which electrically connects the said several photovoltaic cell which comprises the said module unit with the said wiring material. The manufacturing method according to claim 1 ,
The target module characteristic value is set with a first target value and a second target value,
The plurality of holders include a first holder for producing a first module unit having the first target value and a second holder for producing a second module unit having the second target value, respectively. A method for manufacturing a solar cell module. The manufacturing method according to claim 1 or 2 ,
The method for manufacturing a solar cell module, wherein the characteristic value is an output, and the target module characteristic value is a target module output. It is a manufacturing method of Claim 3 , Comprising:
The target module characteristic value is a target module output of the state of the solar cell module,
Manufacture of a solar cell module that selects a plurality of solar cells according to a correlation coefficient between the total output of the selected solar cells and the output of the state of the solar cell module Method. The characteristic value of the solar battery cell is measured, the solar battery cell is distributed to a plurality of holders based on the measured characteristic value and the target module characteristic value, and the target module characteristic value is obtained when electrically connected by a wiring material. Means for producing for each holder a module unit that is a bundle of a plurality of solar cells to be filled;
Means for electrically connecting a plurality of the solar cells constituting the module unit with the wiring member to produce a string;
Equipped with a,
The module unit is produced by distributing a plurality of the solar cells that are smaller than the number constituting the module unit to each holder, and then adding the predetermined number of the characteristic values in each holder and manufacturing system of the said solar cell module Ru conducted to determine the solar cell to be added to each holder on the basis of the target module characteristic value. It is a manufacturing system of the solar cell module according to claim 5 ,
Wherein the module unit to the means for making the string from the means of generating for each of the holder, the manufacturing system of the solar cell module further comprising a hand stage you conveying said holder. It is a manufacturing system of the solar cell module according to claim 6 ,
Means for producing said module unit for each of the holder, it means you conveying said holder further comprises a control means to control the operation of the means of generating and pre Symbol strings,
The said control means is a manufacturing system of the solar cell module which memorize | stores the identification information attached | subjected to the said holder, and the characteristic value of the said several photovoltaic cell contained in the said module unit as a set.

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