Patent Publication Number: US-2023155045-A1

Title: Solar cell module

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Japanese Patent Application No. 2020-070450, the disclosure of which is incorporated herein by reference in its entirety. 
     FIELD 
     The present invention relates to a see-through type solar cell module including at least three solar cell strings, each of which has a plurality of solar cells disposed in a first direction to be electrically connected to each other, the at least three solar cell strings being disposed with spaces interposed respectively therebetween in a second direction. 
     BACKGROUND 
     The solar cell module used for, for example, a glass building material is configured to let in light through the spaces respectively between the solar cell strings adjacent to each other in the second direction while the solar cell strings generate electricity. When the solar cell strings are assembled to form the solar cell module, for example, a number of solar cell strings are disposed with spaces interposed respectively therebetween in the second direction on a glass substrate disposed on a back surface, which is an opposite surface to a light receiving surface, and the same ends of each two solar cell strings adjacent to each other in the second direction are connected to each other with a wire having such a length as to extend over the two ends to thereby allow the each two solar cell strings adjacent to each other in the second direction to be electrically connected to each other (see FIG. 5 of WO 2019/172258 A). 
     CITATION LIST 
     Patent Literature 
     
         
         Patent Literature 1: WO 2019/172258 A 
       
    
     SUMMARY 
     Technical Problem 
     When the solar cell module is used for a glass building material, a solar cell string is formed of a number of long and narrow solar cells connected to each other to such a length as to extend over the substantially entire width of the glass building material, and a plurality of the long and narrow solar cell strings thus formed are disposed with spaces respectively therebetween in a vertical direction, which is the second direction, to form the solar cell module into a blind-like shape for an improved designability. Thus, not only do the number of long and narrow solar cell strings need to be disposed while being adjusted in position, but also each two solar cell strings adjacent to each other in the vertical direction need to be connected via a wire to each other with their ends kept being aligned. This assembly work is troublesome and has some room for improvement. 
     In view of such circumstances, it is an object of the present invention to provide a solar cell module capable of being easily assembled. 
     Solution to Problem 
     A solar cell module according to the present invention includes: at least three solar cell strings, in which each of the at least three solar cell strings is formed of a plurality of solar cells arranged in a first direction and electrically connected to each other, and is formed to have a first end and a second end along the first direction, and the at least three solar cell strings are disposed in a second direction crossing the first direction with spaces interposed respectively therebetween so as to form a light receiving surface on a front surface side; a first transparent plate disposed on the front surface side on which the light receiving surface is formed; and a second transparent plate disposed on a back surface side opposite to the front surface side, in which each of the at least three solar cell strings includes electrically connectable connectors at the first end and the second end, the solar cell module including wire members disposed at the first end and the second end so as to allow connectors at first ends of at least two solar cell strings out of the at least three solar cell strings to be electrically connected to each other, and to allow connectors at second ends thereof to be electrically connected to each other, and the solar cell module including: a first sheet member provided to allow the wire member disposed for each of the first ends to be located in a specific positional relationship with the wire member disposed for each of the second ends corresponding to the respective first ends; and a second sheet member provided to allow the wire member disposed for each of the second ends to be located in a specific positional relationship with the wire member disposed for each of the first ends corresponding to the respective second ends. 
     The configuration can be such that the plurality of solar cells are interconnected with each other by shingling to thereby form each of the at least three solar cell strings. 
     The configuration can be such that each of the wire members includes a connection part extending in the first direction. 
     The configuration can be such that the connection part is formed to have substantially the same width in the second direction as the width in the second direction of each of the connectors of each of the at least three solar cell strings. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a front view of a glass building material formed with a solar cell module of the present invention assembled to a frame member. 
         FIG.  2    is a front view showing a configuration of the solar cell module. 
         FIG.  3    is an enlarged view of a relevant part of  FIG.  2   . 
         FIG.  4    is a front view of connectors of the solar cell string, and parts forming the solar cell module. 
         FIG.  5    is an exploded view of the parts forming the solar cell module. 
         FIG.  6    is a sectional view of the solar cell string formed by interconnection by shingling. 
         FIG.  7 A  is a front view of a wire member connecting the same ends of each two solar cell strings adjacent to each other in the second direction according to another embodiment. 
         FIG.  7 B  is a front view of a wire member connecting the same ends of each two solar cell strings adjacent to each other in the second direction according to another embodiment. 
         FIG.  7 C  is a front view of a wire member connecting the same ends of each two solar cell strings adjacent to each other in the second direction according to another embodiment. 
         FIG.  8 A  is a front view of a first sheet member and two types of wire members formed on the first sheet member according to another embodiment. 
         FIG.  8 B  is a front view showing a state where a negative side electric line is connected in each of the configurations of  FIG.  8 A  and  FIG.  8 C . 
         FIG.  8 C  is a front view of a first sheet member and two wire members formed on the first sheet member according to another embodiment. 
         FIG.  9 A  is a front view of a first sheet member and wire members formed on the first sheet member according to still another embodiment. 
         FIG.  9 B  is a front view showing a state where a negative side electric line is connected to the wire members of  FIG.  9 A  while a positive side electric line is connected to a second sheet member. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     A description will be hereinafter given on a solar cell module according to one embodiment of the present invention with reference to the drawings. 
       FIG.  1    shows a glass building material  3  in which a see-through type solar cell module formed into a blind-like shape is assembled (internally fitted) into a frame member  2  having a rectangular outer shape (a square outer shape in  FIG.  1   ) in front view with an opening thereinside, and having such a shape as to lack one of the four sides of the rectangular shape in cross section. This glass building material  3  is used by being assembled into an opening (not shown) formed in a building. A description will be given with the definitions that in  FIG.  1   , a right and left direction (transverse direction) in front view is referred to as a first direction, and a vertical direction (longitudinal direction) orthogonal to the right and left direction (transverse direction) is referred to as a second direction. In this embodiment, the second direction is a direction orthogonal to the first direction, but the second direction can be a direction crossing the first direction at an angle other than at a right angle. The first direction, which in this embodiment refers to the right and left direction, can be any direction. 
     The solar cell module has an outer shape slightly smaller than the frame  2 , and is formed of a plurality of solar cell strings  4  disposed along the first direction with spaces  5  interposed respectively between the solar cell strings  4  adjacent to each other in the second direction to let in light therethrough. In this embodiment, as shown in  FIG.  3   , five solar cell strings  4  adjacent to each other in the second direction are connected to each other in series to form a unit, and all units (two units are shown in  FIG.  3   ) are connected to each other in parallel to form the solar cell module. As shown in  FIG.  2    to  FIG.  4   , the cell strings  4  forming a unit include, from a lower side, a first solar cell string  41 , a second solar cell string  42 , a third solar cell string  43 , a fourth solar cell string  44 , and a fifth solar cell string  45 . 
     Each of the solar cell strings  4  is formed of a plurality of (e.g.,  60 ) solar cells arranged in the first direction and connected in series to the adjacent ones in the first direction of the plurality of solar cells. Each of the plurality of solar cells has a dimension a (see the enlarged view of  FIG.  2   ) in the second direction (i.e., width) of, for example, 4 mm. Each of the spaces  5  between each two solar cell strings  4  adjacent to each other in the second direction has a dimension b (see the enlarged view of  FIG.  2   ) of 4 mm, which is the same as the dimension in the second direction (i.e., width) of the solar cell. 
     As shown in  FIG.  5   , a high transmission (float) non-tempered glass  6  as a first transparent plate, and a transparent solar cell exclusive sealing member (hereinafter referred to as first sealing member)  7  having substantially the same size as the high transmission (float) non-tempered glass  6  are disposed from a front side of the solar cell module on which a light receiving surface is provided, while a high transmission (float) non-tempered glass  11  as a second transparent plate, and a transparent solar cell exclusive sealing member (hereinafter referred to as second sealing member)  12  having substantially the same size as the high transmission (float) non-tempered glass  11  are disposed from a back side opposite to the light receiving surface of the solar cell module. The plurality of solar cell strings  4  are disposed between the first sealing member  7  on the upper side and the second sealing member  12  on the lower side. The first sealing member  7  and the second sealing member  12  are formed from the same resin material, examples of which include EVA, PO (polyolefin), PVB (polyvinyl butyral), and ionomers. 
     A first end and a second end (the left and right ends in the figures), which are both ends in the first direction of each of the plurality of solar cell strings  4 , respectively include connectors  4 A,  4 B (see  FIG.  4    and  FIG.  5   ) linearly extending on outer sides in the first direction. As shown in  FIG.  4    and  FIG.  5   , the connectors  4 A,  4 B are connected to first to fourth wire members  16  to  19 , which are positioned and fixed on wiring sheet members  13 ,  14  (present on the left and right sides in the figures) disposed on the front surface of both ends in the first direction of the back side second sealing member  12 . 
     As shown in  FIG.  3    and  FIG.  4   , a first wire member  16  electrically connected to a negative side electric line  15 , which is a first wire to which a negative electrode is connected, and a vertically disposed pair of third wire members  18  to which the connectors  4 A of left ends (first ends) of four solar cell strings  4  arranged in the second direction are connected are provided on the wiring sheet member (hereinafter referred to as first sheet member)  13  located on the left side of the figures. A vertically disposed pair of second wire members  17  to which the connectors  4 B of right ends (second ends) of four solar cell strings  4  arranged in the second direction are connected, and a fourth wire member  19  electrically connected to a positive side electric line  20 , which is a second wire to which a positive electrode is connected are provided on the wiring sheet member (hereinafter referred to as second sheet member)  14  located on the right side of the figures. 
     The first wire member  16  and the fourth wire member  19  are made of a conductive metal, and have the same rectangular shape linearly extending in the first direction. The first wire member  16  and the second wire member  19  have their short sides formed to have substantially the same dimension (width) as the dimension (width) in the second direction of each of the connectors  4 A,  4 B of the solar cell string  4 . The first wire member  16  is positioned and fixed at a lower part of the first sheet member  13  so as to lie along the first direction, and the fourth wire member  19  is positioned and fixed at an upper part of the second sheet member  14  so as to lie along the first direction. As shown in  FIG.  4   , an inner end  16 E of the first wire member  16  and an inner end  19 E of the fourth wire member  19  coincide respectively with an inner end  13 E of the first sheet member  13  and an inner end  14 E of the second sheet member  14 . 
     The second wire members  17  and the third wire members  18  share the same shape, and each of the second wire members  17  and the third wire members  18  includes: a vertical pair of connection parts  17 A,  18 A formed into a transversely elongated rectangular shape linearly extending in the first direction; and a coupling part  17 B,  18 B formed into a linear and longitudinally elongated rectangular shape and coupling outer sides in the right and left direction of the vertical pair of connection parts  17 A,  18 A to each other in the vertical direction. The lower one of the third wire members  18  is positioned and fixed on the first sheet member  13  with a specific clearance above the first wire member  16 , and the upper one of the third wire members  18  located above the lower one of the third wire members  18  is positioned and fixed on the first sheet member  13 . The upper one of the second wire members  17  is positioned and fixed on the second sheet member  14  with a specific clearance below the fourth wiring member  19 , and the lower one of the second wire members  17  located below the upper one of the second wire members  17  is positioned and fixed on the second sheet member  14 . 
     As shown in  FIG.  4   , inner ends  17 E of the pair of connection parts  17 A of each of the pair of second wire members  17 , and inner ends  18 E of the pair of connection parts  18 A of each of the pair of third wire members  18  coincide respectively with the inner end of the second sheet member  14  and the inner end of the first sheet member  13 . With this configuration, the solar cell strings  4  placed at the respective positions of the wire members  16  to  19  can be connected to the wire members  16  to  19  simply by connecting the connectors  4 A,  4 B of the solar cell strings  4  to the respective pair of connection parts  17 A,  18 A extending in the first direction while the orientations of the solar cell strings  4  are aligned. Soldering, bonding with a conductive adhesive, adhesion with a conductive film, or the like is to be used to connect the connectors  4 A,  4 B of the solar cell strings  4  to the wire members  16  to  19 . 
     Each of the pair of connection parts  17 A,  18 A is formed to have substantially the same width in the second direction as the width in the second direction of the connector  4 A,  4 B of each of the solar cell strings  4 . With this configuration, the solar cell strings  4  placed at the respective positions of the wire members  16  to  19  can be connected to the wire members  16  to  19  simply by connecting the connectors  4 A,  4 B of the solar cell strings  4  to the pair of connection parts  17 A,  18 A in a state where the connectors  4 A,  4 B are placed to coincide in position with the respective pair of connection parts  17 A,  18 A. 
     The first wire member  16  and the third wire members  18  are provided on the first sheet member  13  fixed to one end in the first direction of the front surface of the second sealing member  12 , so as to have a specific positional relationship with the second wire members  17  and the fourth wire member  19 . The second wire members  17  and the fourth wire member  19  are provided on the second sheet member  14  fixed to the other end in the first direction of the front surface of the second sealing member  12 , so as to have a specific positional relationship with the first wire member  16  and the third wire members  18 . 
     As shown in  FIG.  4   , the specific positional relationship refers to a relationship in which the first wire member  16  is positioned to be opposed in the first direction to, or positioned to coincide in the second direction with the lower one of the pair of connection parts  17 A of the second wire member  17  located on the lower side of the second sheet member  14 . Further, the specific positional relationship refers to a relationship in which the lower one of the pair of connection parts  18 A of the third wire member  18  located on the lower side of the first sheet member  13  is opposed in the first direction to, or positioned to coincide in the second direction with the upper one of the pair of connection parts  17 A of the second wire member  17  located on the lower side of the second sheet member  14 . Still further, the specific positional relationship refers to a relationship in which the upper one of the pair of connection parts  18 A of the third wire member  18  located on the lower side of the first sheet member  13  is opposed in the first direction to, or positioned to coincide in the second direction with the lower one of the pair of connection parts  17 A of the second wire member  17  located on the upper side of the second sheet member  14 . Yet further, the specific positional relationship refers to a relationship in which the lower one of the pair of connection parts  18 A of the third wire member  18  located on the upper side of the first sheet member  13  is opposed in the first direction to, or positioned to coincide in the second direction with the upper one of the pair of connection parts  17 A of the second wire member  17  located on the upper side of the second sheet member  14 . Still further, the specific positional relationship refers to a relationship in which the upper one of the pair of connection parts  18 A of the third wire member  18  located on the upper side of the first sheet member  13  is opposed in the first direction to, or positioned to coincide in the second direction with the fourth wire member  19 . Examples of the method for forming the first wire member  16  to the fourth wire member  19  on the first sheet member  13  and the second sheet member  14  include screen printing using a conductive paste or plating using copper plating. 
     As shown in  FIG.  2   , the negative side electric line  15  is drawn into a negative side terminal box T 1  disposed on the left side of the upper end, and a bypass diode D configured to block electric current from flowing back is provided in the negative side terminal box T 1 . The positive side electric line  20  is drawn into a positive side terminal box T 2  disposed on the right side of the upper end, and is connected to a power extraction line H for extracting power. 
     The first sheet member  13  and the second sheet member  14  share the same configuration, are formed into a vertically elongated rectangular shape as shown in  FIG.  4   , are formed of PI (polyimide), PET (polyethylene terephthalate), or the like, and are formed to have a black color. Wire shielding members  21  (see  FIG.  1    and  FIG.  5   ) each formed into a vertically elongated rectangular shape and having the same size as each of the first sheet member  13  and the second sheet member  14  are disposed to respectively cover the first sheet member  13  and the second sheet member  14 . The wire shielding members  21  are formed of PET (polyethylene terephthalate) or the like, and are formed to have a black color. 
     The first solar cell string  41  to the fifth solar cell string  45  configured as above can be disposed in a specific posture simply by being connected to the first wire member  16  to the fourth wire member  19  provided on the first sheet member  13  and the second sheet member  14  in a specific positional relationship. This configuration can eliminate the work that a plurality of particularly long and narrow solar cell strings are disposed while being placed at specific positions, and the work that the ends of the solar cell strings adjacent to each other are connected to each other by wires. 
       FIG.  6    shows how the plurality of solar cells  22  are arranged to form each of the solar cell strings  4  in this embodiment. That is, the arrangement is made such that a back side bus bar electrode  24  included in the solar cell  22  located on the upper side in  FIG.  6    is disposed to overlap a bus bar electrode  23  included in the solar cell  22  located on the lower side in  FIG.  6   , and the portions of the solar cells  22  in which the bus bars  23 ,  24  overlap each other are electrically connected to each other via a conductive member  25  (the connection of the plurality of solar cells  22  in such a way is referred to as “interconnection by shingling”). The hatched portions on and under each of semiconductor substrates  26  in  FIG.  6    represent finger lines  27  formed on the front surface and the back surface of the semiconductor substrate  26 . Such an arrangement allows the plurality of solar cells  22  to be connected to each other in series to form a solar cell string  4 . The configuration capable of electrical connection between the solar cells only by interconnecting the plurality of solar cells  22  with each other by shingling allows a solar cell string  4  to be easily formed. 
     It is a matter of course that the present invention is not limited to the aforementioned embodiment, and various modifications can be made without departing from the gist of the present invention. 
     The aforementioned embodiment has been described by taking, for example, the case where the second wire member  17  (or the third wire member  18 ) is formed into a rectangular shape with one of the four sides thereof missing in cross section, but as shown in, for example,  FIG.  7 A , the third wire member  18  (and the second wire member  17  as well although not shown) can be formed to have a U-shape. Further, as shown in, for example,  FIG.  7 B , the third wire member  18  (and the second wire member  17  as well although not shown) can be formed to have substantially a V-shape. Still further, as shown in, for example,  FIG.  7 C , the third wire member  18  (and the second wire member  17  as well although not shown) can be formed to have a rectangular shape elongated in the second direction (vertical direction). 
     The aforementioned embodiment has been described by taking, for example, the case where five solar cell strings forming the solar cell module are disposed with specific spaces interposed respectively therebetween in the second direction, and the connectors on both sides of the five solar cell strings are connected to the respective wire members on the first sheet member  13  and the second sheet member  14 , but the configuration can be such that a give number of, such as three, four, or six or more solar cell strings are disposed with specific spaces interposed respectively therebetween. For example,  FIG.  8 A  shows the first sheet member  13  including two first wire members  16  and four third wire members  18  to allow ten solar cell strings to be connected thereto. Specifically, from the lower end to the upper end of the first sheet member  13 , the first wire member  16 , the third wire member  18 , the third wire member  18 , the first wire member  16 , the third wire member  18 , and the third wire member  18  are disposed in this order. All of these wire members  16 ,  18  are made of copper foil. Although not shown, the second sheet member  14  is disposed in the solar cell module in a state obtained by turning the first sheet member  13  of  FIG.  8 A  180° upside down.  FIG.  8 B  shows a state where the negative side electric line  15  (diagonally hatched portion) made of a solder plated copper wire is connected to the first wire members  16  located on the upper and lower sides.  FIG.  8 C  shows a case where the first sheet member  13  includes a coupling part  16 A that electrically couples one sides of the first wire members  16  located on the upper and lower sides. The first wire members  16 , the coupling part  16 A, and the four third wire members  18  are made of copper foil. Although not shown, the second sheet member  14  is disposed in the solar cell module in a state obtained by turning the first sheet member  13  of  FIG.  8 C  180° upside down. Similar to  FIG.  8 A ,  FIG.  8 B  shows a state where the negative side electric line  15  (diagonally hatched portion) made of a solder plated copper wire is connected across the first wire members  16  located on the upper and lower sides. 
       FIG.  9 A  shows a state where the first wire members  16  located on the upper and lower sides and the coupling part  16 A shown in  FIG.  8 C  are not formed (the state shown by two-dot chain line). That is, it shows the state where only the four third wire members  18  made of copper foil are formed. In  FIG.  9 B , the first wire members  16 , the coupling part  16 A, and the negative side electric line  15  on the first sheet member  13  are formed of a solder plated copper wire (diagonally hatched portion). Likewise, four second wire members  17  and the fourth wire members  19 , which are made of copper foil, and a coupling part  19 A that couples one ends of the fourth wire members  19  are formed on the second sheet member  14 , and the fourth wire members  19 , the coupling part  19 A, and the positive side electric line  20  are formed of a solder plated copper wire (diagonally hatched portion).  FIG.  9 B  shows a state where first ends of ten solar cell strings  4  are connected respectively to the first wire members  16  and the third wire members  18  on the first sheet member  13 , and second ends of the ten solar cell strings  4  are connected respectively to the second wire members  17  and the fourth wire members  19  on the second sheet member  14 . The hatched portions in  FIG.  9 B  are formed of the solder plated copper wire. Since the hatched portions shown in  FIG.  8 B  and  FIG.  9 B  are formed of the solder plated copper wire as described above, their resistance can be made smaller than the case where they are made of copper foil to thereby enable large electric current to flow for power collection. 
     The aforementioned embodiment has been described by taking, for example, the case where a solar cell string  4  is formed by interconnecting the plurality of solar cells with each other by shingling, but a solar cell string  4  can be formed by other connection methods including a general connection method. 
     In the aforementioned embodiment, the second direction serves as a direction orthogonal to the first direction, but can be a direction crossing the first direction at an angle other than at a right angle. 
     The configurations and operational effects in relation to the aforementioned embodiment are summarized below. A solar cell module according to the aforementioned embodiment includes: at least three solar cell strings  41  to  43 , in which each of the at least three solar cell strings  41  to  43  is formed of a plurality of solar cells arranged in a first direction and electrically connected to each other, and is formed to have a first end and a second end along the first direction, and the at least three solar cell strings  41  to  43  are disposed in a second direction crossing the first direction with spaces interposed respectively therebetween so as to form a light receiving surface on a front surface side; a first transparent plate  6  disposed on the front surface side on which the light receiving surface is formed; and a second transparent plate  11  disposed on a back surface side opposite to the front surface side, in which each of the at least three solar cell strings  41  to  43  includes electrically connectable connectors  4 A,  4 B at the first end and the second end, the solar cell module including wire members  16  to  18  disposed at the first end and the second end so as to allow connectors  4 A at first ends of at least two solar cell strings out of the at least three solar cell strings  41  to  43  to be electrically connected to each other, and to allow connectors  4 B at second ends thereof to be electrically connected to each other, and the solar cell module including: a first sheet member  13  provided to allow the wire member  16 ,  18  disposed for each of the first ends to be located in a specific positional relationship with the wire member  17  disposed for each of the second ends corresponding to the respective first ends; and a second sheet member  14  provided to allow the wire member  17  disposed for each of the second ends to be located in a specific positional relationship with the wire member  16 ,  18  disposed for each of the first ends corresponding to the respective second ends. 
     According to such a configuration, the at least two solar cell strings out of the at least three solar cell strings  41  to  43  can be disposed in a specific posture simply by connecting the connectors  4 A,  4 B of the first end and the second end of the each of at least two solar cell strings to the respective wire members  16  to  18  provided on the first sheet member  13  and the second sheet member  14  in a specific positional relationship. This configuration can eliminate the work that a plurality of solar cell strings are disposed while being placed at specific positions, and the work that the ends of the solar cell strings adjacent to each other are connected to each other by wires. 
     The configuration can be such that the plurality of solar cells are interconnected with each other by shingling to thereby form each of the at least three solar cell strings  41  to  43 . 
     The above configuration capable of electrical connection between the solar cells only by interconnecting the plurality of solar cells with each other by shingling allows a solar cell string to be easily formed. 
     The configuration can be such that each of the wire members  16  to  18  includes a connection part  17 A,  18 A extending in the first direction. 
     According to the above configuration, the solar cell strings  41  to  43  placed at the respective positions of the wire members  16  to  18  can be connected to the wire members  16  to  18  simply by connecting each of the connectors  4 A,  4 B of each of the solar cell strings  41  to  43  to the connection part  17 A,  18 A extending in the first direction while the orientations of the connectors  4 A,  4 B are aligned. 
     The configuration can be such that the connection part  17 A,  18 A is formed to have substantially the same width in the second direction as the width in the second direction of each of the connectors  4 A,  4 B of each of the at least three solar cell strings  41  to  43 . 
     According to the above configuration, the solar cell strings  41  to  43  placed at the respective positions of the wire members  16  to  18  can be connected to the wire members  16  to  18  simply by connecting each of the connectors  4 A,  4 B of each of the solar cell strings  41  to  43  to the connection part  17 A,  18 A in a state where each of the connectors  4 A,  4 B is placed to coincide in position with the connection part  17 A,  18 A. 
     As described above, according to the aforementioned embodiment, at least two solar cell strings can be disposed in a specific posture simply by connecting the connectors  4 A,  4 B at both ends of each of the at least two solar cell strings to the respective wire members  16  to  18  provided on the first sheet member  13  and the second sheet member  14  in a specific positional relationship. Thus, a solar cell module capable of being easily assembled can be provided. 
     REFERENCE SIGNS LIST 
     
         
         
           
               2 : Frame member 
               3 : Glass building material 
               4 : Solar cell string 
               4 A,  4 B: Connector 
               5 : Space 
               6 : High transmission (float) non-tempered glass (first transparent plate) 
               7 : First sealing member 
               11 : High transmission (float) non-tempered glass (second transparent plate) 
               12 : Second sealing member 
               13 : Wiring sheet member (first sheet member) 
               14 : Wiring sheet member (second sheet member) 
               15 : Negative side electric line 
               16 : First wire member 
               16 A: Coupling part 
               17 : Second wire member 
               18 : Third wire member 
               19 : Fourth wire member 
               19 A: Coupling part 
               17 A,  18 A: Connection part 
               17 B,  18 B: Coupling part 
               20 : Positive side electric line 
               21 : Wire shielding member 
               22 : Solar cell 
               23 : Bus bar electrode 
               24 : Back side bus bar electrode 
               25 : Conductive member 
               26 : Semiconductor substrate 
               27 : Finger line 
               41 : First solar cell string 
               42 : Second solar cell string 
               43 : Third solar cell string 
             D: Bus bar diode 
             H: Power extraction line 
             T 1 : Negative side terminal box 
             T 2 : Positive side terminal box