Abstract:
The present invention relates to a solar cell module comprising: a transparent plate; a support plate positioned to face the transparent plate; at least one unit cell disposed between the transparent plate and the support plate; a first filler disposed between the transparent plate and the unit cell; a second filler disposed between the support plate and the unit cell; and a reflective layer which is disposed between the second filler and the support plate, and which reflects sunlight that has passed through the transparent plate on the unit cell, wherein the length of the reflective layer is shorter than the length of the second filler and the second filler directly comes in contact with the support plate. According to this configuration, the amount of sunlight irradiated on the unit cell can be increased, thereby enhancing generating efficiency and improving the durability of the solar cell module.

Description:
CROSS REFERENCE TO PRIOR APPLICATIONS 
       [0001]    This application is a National Stage Application of PCT International Patent Application No. PCT/KR2012/005568 filed on Jul. 13, 2012, under 35 U.S.C. §371, which claims priority to Korean Patent Application No. 10-2012-0025072 filed on Mar. 12, 2012, which are all hereby incorporated by reference in their entirety. 
     
    
     BACKGROUND 
       [0002]    The present invention relates to a solar cell module and a method of manufacturing the same. 
         [0003]    A solar cell module is a semiconductor element which converts light energy into electrical energy using photoelectric effect, and comes into spotlight because of non-polluting, no-noise, and inexhaustible supply energy. Recently, the solar cell module spreads around the globe due to high awareness on environmental issues. Interest in global warming due to emission of CO 2  picks up and demand on clean energy grows strong. A solar cell is expected to become a clean energy source due to safety and ease of handling. 
         [0004]    A solar cell module includes a plurality of unit cells connected to each other with a gap therebetween and a transparent plate and an insulator positioned at both sides of the unit cells. 
         [0005]    The electrical energy is generated by supplying sunlight passing through the transparent plate of the solar cell module to the unit cells. Since the solar cell module generates the electrical energy by using the sunlight directly radiated to each unit cell, the number of the unit cells should be increased in order to increase electricity generation capacity of the solar cell module. However, this method has problems such that a size of the solar cell module becomes large proportional to the number of the unit cells. 
         [0006]    To solve such problems, the applicant has suggested a solar cell module having improved electricity generation efficiency compared to the solar cell module having the same size by disposing a reflective layer in solar cell module and supplying to each unit cell the sunlight that is not directly radiated to each unit cell. This technique is filed in Korean Patent Office as Patent Application No. 2010-0111814 and is granted on Oct. 21, 2011. 
       SUMMARY OF THE INVENTION 
       [0007]    The present invention has been made in an effort to provide a solar cell module and method of manufacturing the same having advantages of obtaining higher electricity generation efficiency than a conventional solar cell module having the same size and improving durability. 
         [0008]    A solar cell module according to an exemplary embodiment of the present invention includes a transparent plate, a support plate positioned to face the transparent plate, at least one unit cell disposed between the transparent plate and the support plate, a first filler disposed between the transparent plate and the unit cell, a second filler disposed between the support plate and the unit cell, and a reflective layer disposed between the second filler and the support plate, wherein a length of the reflective layer is shorter than that of the second filler and the second filler is directly attached with the support plate. 
         [0009]    The reflective layer can reflect solar light passing through the transparent plate to the unit cell or reflect solar light passing through the support plate to the exterior. 
         [0010]    The plurality of unit cells may be disposed apart from each other, the reflective layer may include a plurality of reflective members, the plurality of reflective members may be disposed apart from each other, and each reflective member may be disposed to face a space between neighboring two of the unit cells. A surface region of the reflective layer facing the unit cells is flat, and a surface region of the reflective layer facing the space between the neighboring two of the unit cells includes a curved surface being convex upwardly. 
         [0011]    The second filler may penetrate through a space between the plurality of reflective members and may be directly attached to the support plate. 
         [0012]    The solar cell module may further include a cover covering sides of the transparent plate and the support plate and made of synthetic resin. 
         [0013]    The cover may be made of resin selected from the group consisting of polyamide, polystyrene, acryl, and polyethylene and combinations thereof. 
         [0014]    The solar cell module may further include a metal frame mounted at the cover, wherein protrusions and depressions are formed on contacting surfaces of the cover and the frame, and the contacting surfaces of the cover and the frame are coupled to each other by coupling the depressions of the cover to the protrusions of the frame. The solar cell module may further include a supporter connected to a surface of the support plate opposite to a surface of the support plate facing the reflective layer, and the supporter may include first and second regions attached on the support plate and a third region formed between the first region and the second region and apart from the support plate. 
         [0015]    The solar cell module may further include a junction box mounted at an opposite surface of a surface facing the unit cell among surfaces of the support plate and a bus bar having a side connected to the unit cell and the other side connected to the junction box, wherein a hole is bored at the support plate, the junction box is mounted at a position corresponding to the hole, and the bus bar penetrates through the hole and is connected to the junction box. 
         [0016]    The reflective layer may include a first reflective surface facing the transparent plate and a second reflective surface facing the support plate, and the support plate may be transparent. 
         [0017]    The solar cell module may further include an insulating layer formed on the first reflective surface and being transparent. 
         [0018]    A solar cell module according to another exemplary embodiment of the present invention includes a transparent plate, a support plate connected to the transparent plate in a state of facing the transparent plate, at least one unit cell disposed between the transparent plate and the support plate, a junction box mounted at an exterior surface of the support plate, and a bus bar having a side connected to the unit cell and the other side connected to the junction box, wherein a hole is bored at the support plate, the junction box is mounted at a position corresponding to the hole, and the bus bar penetrates through the hole and connected to the junction box. 
         [0019]    The transparent plate and the support plate may be made of glass. 
         [0020]    A solar cell module according to another exemplary embodiment of the present invention includes a transparent plate, a support plate positioned to face the transparent plate, at least one unit cell disposed between the transparent plate and the support plate, a first filler disposed between the transparent plate and the unit cell, a second filler disposed between the support plate and the unit cell, and a supporter attached just on a surface of the support plate. 
         [0021]    The supporter may include first and second regions attached on the support plate and a third region formed between the first region and the second region and apart from the support plate. 
         [0022]    The transparent plate and the support plate are attached by the first filler and the second filler, and no frame is mounted at edges of the transparent plate and the support plate. 
         [0023]    A method of manufacturing a solar cell module according to another exemplary embodiment of the present invention includes disposing a plurality of unit cells between a transparent plate and a support plate facing each other, disposing a first filler between the transparent plate and the unit cell, disposing a second filler between the support plate and the unit cell, disposing a reflective layer having plane area smaller than that of the second filler between the second filler and the support plate, wherein solar light is reflected on at least one surface of a surface facing the transparent plate and a surface facing the support plate, and directly attaching the second filler and the support plate by heating the second filler. 
         [0024]    The method may further include coupling a cover made of synthetic resin to side surfaces of the transparent plate and the support plate. 
         [0025]    The method may further include forming first protrusions and depressions on an exterior surface of the cover, manufacturing a metal frame having second protrusions and depressions corresponding to the first protrusions and depressions formed thereon, and mounting the metal frame on the cover by coupling the second protrusions and depressions with the first protrusions and depressions. 
         [0026]    The method may further include boring a hole at the support plate, mounting a junction box at the support plate, and connecting a bus bar connected to the unit cell to the junction box by drawing out the bus bar through the hole, wherein the junction box covers the hole. 
         [0027]    Since solar light radiated between unit cells is reflected by a reflective layer and then is supplied to the unit cells again so as to be used as electricity generation energy according to an exemplary embodiment of the present invention, a solar cell module having the same size as a conventional one may achieve high electricity generation efficiency. In addition, since a second filler and a support plate made of glass are directly attached, adhesive property may be excellent and durability of a solar cell module may be improved. 
         [0028]    Since a cover made of synthetic resin acts as a buffer according to an exemplary embodiment of the present invention, risk of damaging a transparent plate and a support plate by external impact may be minimized. 
         [0029]    Since a metal frame is attached by coupling protrusions and depressions of the cover the metal frame according to an exemplary embodiment of the present invention, manufacturing time of the solar cell module may be reduced and thereby improving productivity. 
         [0030]    Since the solar light passing through the support plate is reflected by a second reflective surface and is out according to an exemplary embodiment of the present invention, cycle-life deterioration of the solar cell due to rise of interior temperature may be prevented. 
         [0031]    Since an entire surface of a case part is flat according to an exemplary embodiment of the present invention, foreign materials such as dust and snow may be easily removed from a surface of a transparent plate. Therefore, the transparent plate may maintain cleanliness for a long time, cleaning of the transparent plate may be easy, and electricity generation efficiency of the solar cell module may be enhanced. Since the cover and the frame is not mounted at the case part, manufacturing may be easy and weight is light. 
         [0032]    Even though a support plate is slightly curved due to a shape of a supporter, the supporter can be closely contacted to the support plate and durability may be improved according to an exemplary embodiment of the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0033]      FIG. 1  is a cross-sectional view of a solar cell module according to an exemplary embodiment of the present invention, 
           [0034]      FIG. 2  is an exploded perspective view of a solar cell module illustrated in  FIG. 1 , 
           [0035]      FIG. 3  to  FIG. 8  are cross-sectional views of a solar cell module according to another exemplary embodiment of the present invention, 
           [0036]      FIG. 9  illustrates a glass plate, and a cover and a frame that is not coupled to a side of the glass plate, 
           [0037]      FIG. 10  is an enlarged view of X in  FIG. 9 , 
           [0038]      FIG. 11  illustrates a support plate and a junction box that are separated from each other, 
           [0039]      FIG. 12  illustrates a support plate and a junction box in  FIG. 11  that are coupled to each other, 
           [0040]      FIG. 13  is a cross-sectional view of a solar cell module according to another exemplary embodiment of the present invention, 
           [0041]      FIG. 14  is an enlarged view of Y illustrated in  FIG. 13 , 
           [0042]      FIG. 15  is a perspective view of a solar cell module according to another exemplary embodiment of the present invention, 
           [0043]      FIG. 16  is an enlarged view of a supporter illustrated in  FIG. 15 , and 
           [0044]      FIG. 17  is a perspective view of a solar cell module according to another exemplary embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0045]    The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Like reference numerals designate like elements throughout the specification. 
         [0046]      FIG. 1  and  FIG. 2  illustrate an exemplary embodiment of the present invention, and a solar cell module according to the present exemplary embodiment includes a case part  100 , a reflective layer  200 , a filler layer  400  and a solar cell  500 . 
         [0047]    The case part  100  transmits solar light and functions as a case of the solar cell  500 , and includes a transparent plate  110  and a support plate  120 . 
         [0048]    The transparent plate  110  concentrates the solar light required for generating electricity and protects a solar cell. The transparent plate  110  may be made of glass. 
         [0049]    Since the transparent plate  110  is exposed to the outside, tempered glass may be used as the transparent plate  110  to prevent breakage. Other than glass, any material that is transparent and has sufficient strength may be used as the transparent plate  110 . In addition, the transparent plate  110  may have a quadrangular shape as illustrated in the drawings, a circular shape, or any other shape according to mounting environment. 
         [0050]    If necessary, an additional protective film, not illustrated in the drawings, may be attached on a surface of the transparent plate  110  so as to block ultraviolet rays having bad influence on cycle-life of the solar cell and prevent surface damage of the transparent plate  110  from the outside. 
         [0051]    The support plate  120  included in the case part  100  with the transparent plate  110  functions as protection of the solar cell and a mounting plate when the solar cell module is mounted. The support plate  120  has the same area and shape as the transparent plate  110 , and is made of glass similar to the transparent plate  110 , TPT (Tedlar/PET/Tedlar), PET (PolyEthylene Terephthalate), etc. 
         [0052]    The support plate  120  and the transparent plate  110  are disposed to face each other. 
         [0053]    The reflective layer  200  is mounted in the case part  100 . 
         [0054]    The reflective layer  200  reflects solar light that passes through the transparent plate  110  and is not radiated directly to each unit cell  510  of the solar cell  500  but is radiated to a space between the unit cells  510  so as to help the unit cells utilize the solar cell as energy source. The reflective layer  200  includes a body  210  and first and second reflective surfaces  220  and  240 . However, the reflective layer  200  may include any one of the first reflective surface  220  and the second reflective surface  240  or may not include the body  210 . In this case, the reflective layer  200 , as shown in  FIG. 17 , may be formed as one layer, and both surfaces of the reflective layer  200  may be used as reflective surfaces. 
         [0055]    The reflective layer  200 , in cross-sectional view, is shorter than the transparent plate  110  and the support plate  120 . A length L from an edge of the transparent plate  110  or an edge of the support plate  120  to an edge of the reflective layer  200  may be 10 to 15 mm. Adherence of the filler layer  400  and the support plate  120  may be deteriorated if the length L is smaller than 10 mm. If the length L is larger than 15 mm, electricity generation efficiency may be deteriorated because a space in which the solar cell  500  is disposed is reduced. 
         [0056]    The body  210  functions as a frame for forming the first and second reflective surfaces  220  and  240 . The body  210  has a plate shape and is mounted on a surface of the support plate  120  facing the transparent plate  110 . 
         [0057]    In addition, the first reflective surface  220  guides the solar light passing through the transparent plate  110  to the solar cell  500 , made of reflective material that can reflect the solar light, and is formed on a surface of the body  210  facing the transparent plate  110 . 
         [0058]    Aluminum, silver, mercury, platinum, titanium or silver foil that can reflect light may be used as the first reflective surface  220 . The first reflective surface  220  may be formed by mirror coating or deposition method for manufacturing a mirror. 
         [0059]    In addition, the second reflective surface  240  reflects light passing through the support plate  120  and maintains appropriate temperature in a space between the transparent plate  110  and the support plate  120 . The second reflective surface  240  is formed on a surface of the body  210  facing the support plate  120  using the same material as or similar material to the first reflective surface  220 . 
         [0060]    The second reflective surface  240  is formed by the same method as or similar method to the first reflective surface  220 . 
         [0061]    In a state that the reflective layer  200  is provided, the filler layer  400  is formed between the transparent plate  110  and the support plate  120 . 
         [0062]    The filler layer  400  fixes and protects the solar cell  500  and connects the transparent plate  110  and the support plate  120 . The filler layer  400  is made of ethylene vinyl acetate (EVA), polyvinylbutyral (PVB) of film shape, ionomer, or silicon-based sheet. 
         [0063]    At this time, the filler layer  400  includes a first filler  410  and a second filler  420 . The first filler  410  is transparent and has insulating nature. The first filler  410  is laid on a surface of the reflective layer  200  facing the transparent plate  110 . The second filler  420  is transparent and has insulating nature. The second filler  420  is laid on a surface of the transparent plate  110  facing the reflective layer  200 . 
         [0064]    The first filler  410  and the second filler  420 , in cross-sectional view, are longer than the reflective layer  200 . That is, in top view, areas of the first and second fillers  410  and  420  are larger than that of the reflective layer  200 , respectively. The areas of the first and second fillers  410  and  410  may be the same as that of the case part  100 , respectively. 
         [0065]    The solar cell  500  generates electricity using the solar light, and the unit cells  510  are connected to each other through a ribbon  520  in a state of being disposed apart from each other so as to form a dust collecting structure. The solar cell  500  is disposed between the first filler  410  and the second filler  420 . 
         [0066]    Since the unit cells  510  are disposed apart from each other, the first reflective surface  210  of the reflective layer  200  is exposed between the unit cells  510 . 
         [0067]    If the transparent plate  110  and the support plate  120  are pressed and heated in a state that the reflective layer  200 , the filler layer  400  and the solar cell  500  are sequentially stacked up between the transparent plate  110  and the support plate  120 , the filler layer  400  is operated as adhesive and is integrated to the transparent plate  100 /the support plate  120 . 
         [0068]    That is, the first filler  410  completely covers an upper surfaces and side surfaces of the reflective layer  200 , and directly contacts with and is fixed to the support plate  120  around the reflective layer  200 . 
         [0069]    In this manner, the reflective layer  200  containing metal components and the solar cell  500  can be electrically isolated 
         [0070]    Further, in order to increase electric insulation between the reflective layer  200  and the solar cell  500 , an insulating layer (not shown) being transparent may be formed between the first filler  410  and the reflective layer  200 . 
         [0071]    In addition, since the first filler  410  is directly coupled to the support plate  120  of glass material according to the present exemplary embodiment, coupling force of the module may be strengthened. If the first filler  410  is attached to the reflective layer  200  and the reflective layer  200  containing the metal components is attached to the support plate  120 , durability of the solar cell module may be bad because adherence between the metal components and the glass is bad. 
         [0072]    The second filler  420  is directly attached to the transparent plate  110 . 
         [0073]    The first and second fillers  410  and  420  can be formed as filler layers attached to the transparent plate  110  and the support plate  120  by applying suitable heat and pressure thereto. 
         [0074]    Functions and effects of the present exemplary embodiment having the above-mentioned structure will hereinafter be described. 
         [0075]    As shown in  FIG. 1 , the solar light S passing through the transparent plate  110  also passes through the filler layer  400 . After that, the solar light S is directly radiated to each unit cell  510  of the solar cell  500  and is used as electricity generation energy. 
         [0076]    In addition, the solar light that is not directly radiated to the unit cells  510  and is radiated to the space between the unit cells  510  is radiated to the first reflective surface  220 . The solar light that is radiated to the first reflective surface  220  is reflected from the first reflective surface  220  and is supplied to the unit cell  510 . The solar light that is reflected from the first reflective surface  220  may be reflected again by the transparent plate  110  and may be then supplied to the unit cell  510 . 
         [0077]    Since the solar light that is not directly radiated to the unit cells  510  is guided to the unit cells  510  by using the reflective layer  200 , electricity generation efficiency of the solar cell may be maximized. 
         [0078]    In addition, the solar light S radiated toward the support plate  120  is reflected to the exterior by the second reflective surface  240  of the reflective layer  200  after passing through the support plate  120 . Therefore, rise of interior temperature of the solar cell module due to the solar light may be prevented. 
         [0079]    According to the present invention, electricity generation efficiency may be enhanced by maximizing collection of the solar light using the reflective layer and cycle-life of the module may be extended by suppressing unnecessary rise of interior temperature. 
         [0080]    Variations of the present invention will hereinafter be described. 
         [0081]      FIG. 3  illustrates another exemplary embodiment of the present invention, and constituent elements of another exemplary embodiment are similar to those of the exemplary embodiment. However, the first reflective surface  220  is not entirely formed on one surface of the body  210  and consists of a plurality of reflective members that are disposed apart from each other such that each reflective member corresponds to a space between a unit cell  510  and a neighboring unit cell  510 . 
         [0082]    If each of the first reflective surface  220  is formed between neighboring unit cells  510 , material used to manufacture the first reflective surface  220  may be reduced. 
         [0083]    The present exemplary embodiment may include all of the constitute elements illustrated in  FIG. 1  and  FIG. 2 . 
         [0084]    In addition,  FIG. 4  illustrates another exemplary embodiment of the present invention, and constituent elements of another exemplary embodiment are substantially the same as those of the exemplary embodiment illustrated in  FIG. 1  and  FIG. 2 . However, the reflective layer  200  is formed with one layer and a thermal insulating member  250  is interposed between the reflective layer  200  and the support plate  120  according to the present exemplary embodiment. In this way, heat transferred through the support plate  120  may be effectively blocked, thereby minimizing rise of interior temperature of the solar cell module. 
         [0085]    An insulating layer for increasing insulation with the unit cells  510  may be formed on the reflective layer  200 . 
         [0086]    The present exemplary embodiment may include all of the constitute elements illustrated in  FIG. 1  to  FIG. 3 . 
         [0087]      FIG. 5  illustrates another exemplary embodiment of the present invention, and constituent elements of another exemplary embodiment are substantially the same as those of the exemplary embodiment illustrated in  FIG. 1  and  FIG. 2 . However, structure of the reflective layer  200  is changed so that only the second reflective surface  240  is formed at the body  210 . 
         [0088]    In this way, rise of interior temperature of the module due to the solar light or geothermy passing through the support plate  120  may be suppressed and manufacturing cost and time of the reflective layer  200  may be reduced. 
         [0089]    The present exemplary embodiment may include all of the constitute elements illustrated in  FIG. 1  and  FIG. 2 . If an insulating layer is applied to the present exemplary embodiment, the insulating layer may be opaque because the insulating layer does not need to be transparent. 
         [0090]    In addition,  FIG. 6  illustrates another exemplary embodiment of the present invention, and does not include the second reflective surface  240  like the exemplary embodiment illustrated in  FIG. 4 . However, the present exemplary embodiment can suppress rise of interior temperature of the module without forming the second reflective surface  240 . 
         [0091]    For this purpose, the support plate  120  itself is opaque so as to block the solar light or, as shown in the drawing, an additional reflective layer  600  is formed on a surface of the support plate  120  such that the solar light does not pass through the support plate but is reflected by the additional reflective layer  600 . Therefore, rise of interior temperature of the module is suppressed. 
         [0092]    At this time, the additional reflective layer  600  may formed by white paint or a reflective film and may be sprayed or deposited on the surface of the support plate  120 . 
         [0093]      FIG. 7  illustrates another exemplary embodiment of the present invention. According to the present exemplary embodiment, only the second reflective surface  240  is formed at the body  210  like the exemplary embodiment illustrated in  FIG. 5  but the filler layer  400  functions as the first reflective surface  220 . 
         [0094]    For this purpose, the second filler  420  of the filler layer  400  is transparent and the first filler  410  of the filler layer  400  is opaque but can reflect the solar light. 
         [0095]    For example, a white resin is used to manufacture the second filler  420  or, as shown in the drawing, the first reflective surface is formed on a part of surfaces of the second filler  420 . 
         [0096]    Therefore, the solar light passing through the transparent plate  110  and the second filler  420  and radiated between the unit cells  510  is reflected by the first filler  410  and is supplied to each unit cell  510 . 
         [0097]    If it is less likely to increase interior temperature of the module and the second reflective surface  240  is unnecessary, the body  210  and the second reflective surface  240  are omitted and the second filler  420  is used to reflect the solar light. 
         [0098]    In addition, as shown in  FIG. 8 , the body  210  is omitted and the first and second reflective surfaces  220  and  240  are formed on both surfaces of the first filler  410 . In this case, the second filler  420  performs function of the body  210 . The first and second reflective surfaces  220  and  240  may be formed on the first filler  410  by white paint or a film that can reflect the solar light. 
         [0099]    The present exemplary embodiment may include all of the constitute elements illustrated in  FIG. 1  to  FIG. 6 . 
         [0100]      FIG. 9  and  FIG. 10  illustrate another exemplary embodiment of the present invention, and constituent elements illustrated in  FIG. 1  to  FIG. 8  may be applied to the present exemplary embodiment. Addition to such constituent elements, a cover  700  and a frame  800  that cover side surfaces of the transparent plate  110  and the support plate  200  are further included. 
         [0101]    The cover  700  may be made of synthetic resin selected from the group consisting of polyamide, polystyrene, acryl, and polyethylene and combinations thereof. 
         [0102]    The cover  700  absorbs impact and prevents breakage of the transparent plate  110 /the support plate  120  when the frame  800  made of metal is coupled to the transparent plate  110 /the support plate  120  made of glass. 
         [0103]    The cover  700  are fixed to the side surfaces and peripheries of the transparent plate  110  and the support plate  200  by a silicon (not shown). Protrusions and depressions  710  are formed on an exterior surface of the cover  700 . 
         [0104]    The frame  800  is made of metal such as aluminum, is fixed to the side surfaces of the transparent plate  110  and the support plate  200 , and protects the transparent plate  110  and the support plate  120  made of glass and the unit cells from external impact. 
         [0105]    Protrusions and depressions  810  are formed at a surface of the frame  800  contacting with the exterior surface of the cover  700 . The protrusions and depressions  810  of the frame  800  is coupled to the protrusions and depressions  710  of the cover  700  such that the frame  800  is fixed to the cover  700 . 
         [0106]      FIG. 11  and  FIG. 12  illustrate another exemplary embodiment of the present invention, and constituent elements illustrated in  FIG. 1  to  FIG. 10  may be applied to the present exemplary embodiment. However, a hole  121  is bored at the support plate  120 . 
         [0107]    In addition, a junction box  900  is mounted at an exterior surface of the support plate  120 . The junction box  900  covers a hole  121 . 
         [0108]    The ribbons  520  (please refer to  FIG. 1 ) connected to each unit cell  510  are connected to a bus bar  530 . The bus bar  530  in the module is drawn out through the hole  121  formed at the support plate  120  and is connected to the junction box  900 . 
         [0109]    A plurality of bus bars  530  may be provided and a plurality of holes  121  may be formed at the support plate  120 . If the plurality of hole  121  are formed at the support plate  120 , a plurality of junction boxes  900  are provided such that each junction box  900  covers each hole  121 . 
         [0110]    In this case, each bus bars  530  may be drawn out through each hole  121 . However, some bus bars  530  may be drawn out through one hole  121 . 
         [0111]    If the bus bar  530  is drawn out between the transparent plate  110  and the support plate  120 , that is, through a side of the module, insulation may be damaged by moisture or impact. Since the hole  121  is formed at a position where the junction box  800  is mounted, however, the bus bar  530  can be protected according to the present exemplary embodiment. 
         [0112]      FIG. 13  and  FIG. 1410  illustrate another exemplary embodiment of the present invention, and the solar cell module according to the present exemplary embodiment includes the case part  100 , the reflective layer  200 , the filler layer  400  and the solar cell  500 . Constituent elements of the present exemplary embodiment are substantially the same as those of the exemplary embodiments illustrated in  FIG. 1  and  FIG. 2 . 
         [0113]    However, a shape of the first reflective surface  220  is changed so as to reflect more solar light to the solar cell  500  according to the present exemplary embodiment. 
         [0114]    A part of the first reflective surface  220  may be divided into a first region A, a second region B and a third region C. The first region A and the third region C are convex downwardly, and the second region B is a regions where the first region A and the third region C are joined and is convex upwardly. 
         [0115]    However, the second region B may be sharp as a consequence that the first region A and the third region C that are convex downwardly are joined directly at the second region B. 
         [0116]    The solar light passing between the unit cells  510  reaches the first region A and the third region C. The solar light reaching the first region A is reflected to the left unit cell  510  in  FIG. 14  and the solar light reaching the third region C is reflected to the right unit cell  510  in  FIG. 14 . 
         [0117]    The second region B is convex upwardly so as to minimize force applied to the solar cell  500  when the first reflective surface  220  is attached to the filler layer  400  and the solar cell  500 . 
         [0118]    When the first reflective surface  220 , the filler layer  400  and the solar cell  500  are attached to each other, the sharp second region B may become flat or be convex upwardly. In this case, it is designed that excessive force is not applied to the solar cell  500  even though a sharp portion of the first reflective surface  220  is attached to the filler layer  400  and the solar cell  500 . 
         [0119]    The present exemplary embodiment may include all of the constitute elements illustrated in  FIG. 1  and  FIG. 2 . 
         [0120]    In addition, the first reflective surface  220  including the first, second, and third regions A, B, and C may be applied to the exemplary embodiments illustrated in  FIG. 3 ,  FIG. 4 ,  FIG. 6 ,  FIG. 7  and  FIG. 8 . 
         [0121]      FIG. 15  illustrates a solar cell module according to another exemplary embodiment of the present invention, and  FIG. 16  is an enlarged view of the supporter  100  shown in  FIG. 15 . As shown in  FIG. 15  and  FIG. 16 , the solar cell module according to the present exemplary embodiment includes the case part  100  and a supporter  1000 . The case part  100  includes the transparent plate  110  and the support plate  120 . 
         [0122]    The transparent plate  110  may be made of material such as glass that can passes the solar light. The support plate  120  is mounted to face the transparent plate  110 . The reflective layer, the filler layer, and the solar cell are disposed between the transparent plate  110  and the support plate  120 . The reflective layer, the filler layer, and the solar cell illustrated in  FIG. 1  to  FIG. 8 ,  FIG. 11  to  FIG. 14  may be applied to the present exemplary embodiment. 
         [0123]    However, the present exemplary embodiment may not include the cover  700  and the frame  800  illustrated in  FIG. 9  and  FIG. 10 . 
         [0124]    The supporter  1000  is coupled to one surface of the support plate  120 . The supporter  1000  may be made of metal or synthetic resin and includes an attaching member  1100  and a coupling member  1200 . The supporter  1000  may be coupled to a structure for supporting the solar cell module. 
         [0125]    The attaching member  1100  includes first and second regions  1110  and  1120  contacting with the support plate  120  and a third region  1130  positioned between the first region  1110  and the second region  1120  and apart from the support plate  120 . 
         [0126]    The attaching member  1100  has a hollow space therein and a supporting member  1150  is formed in the hollow space. The supporting member  1150  supports the third region  1130  so as to cause the attaching member  1100  to have predetermined strength. The supporting member  1150  may be omitted. 
         [0127]    The first region  1110  and the second region  1120  is attached to the support plate  120  by adhesive such as silicon. Finishing members (not shown) may be coupled to both sides of the attaching member  1100  so as to isolate the hollow space in the attaching member  1100  from the outside. 
         [0128]    Since the third region  1130  has a recess shape, a bottom of the third region  1130  is lower than surfaces of the first and second regions  1110  and  1120 . Therefore, the third region  1130  can be disposed apart from the support plate  120  by a predetermined gap. The third region  1130  are integrally formed with the first region  1110  and the second region  1120  and connects the first region  1110  and the second region  1120 . 
         [0129]    According to the present exemplary embodiment, the first region  1110  and the second region  1120  of the supporter  1000  is attached to the support plate  120 , and the third portion  1130  between the first region  1110  and the second region  1120  is spaced from the support plate  120 . Therefore, even though a bottom surface of the support plate  120  is curved, the first and second regions  1110  and  1120  are moved flexibly along the curvature such that entire surfaces of the first and second regions  1110  and  1120  can closely contact with the support plate. In addition, even though any one region of the first region  1110  or the second region  1120  is detached from the support plate  120  during usage of the solar cell module, the other region of the first region  1110  or the second region  1120  is maintained to be attached to the support plate  120 . 
         [0130]    If the supporting member  1150  is omitted, the first and second regions  1110  and  1120  can move more flexibly with predetermined resilience. Therefore, even though the bottom surface of the support plate  120  is curved, the first and second regions  1110  and  1120  are moved along the curvature and further closely contact with the support plate. 
         [0131]    Since the cover  700  (please see  FIG. 9 ) and the frame  800  (please see  FIG. 9 ) are not mounted in the present exemplary embodiment, a stepped portion is not formed at the transparent plate  110 . Since an entire surface of the transparent plate  110  is maintained to be flat, foreign materials such as dust and snow may be easily dropped from the surface of the transparent plate  100 . The present exemplary embodiment may be very useful in a desert region where a plenty of gritty dust exist. Since foreign materials are not easily stacked up on the surface of the transparent plate  100 , electricity generation efficiency of the solar cell module increases. 
         [0132]    In addition, since the cover or the frame are not mounted at the case part  100  according to the present exemplary embodiment, manufacturing process may be simple and weight becomes reduced. 
         [0133]    In addition, compared with a conventional solar cell module having the same size, an output may increase. Compared with a conventional solar cell module generating the same output, size may be reduced. 
         [0134]    While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.