Patent Publication Number: US-2023155543-A1

Title: Solar cell module including reflection plate and method for adjusting reflection module

Description:
TECHNICAL FIELD 
     The present invention relates to a solar cell module including a solar cell panel and a reflection plate and a method for adjusting the reflection plate. 
     BACKGROUND ART 
     In general, a solar cell module is completed through a process of connecting electrode wires of cells by using a copper ribbon and laminating and pressing in an order of a back sheet, ethylene-vinyl acetate (EVA), a solar cell, EVA, and a cover glass, a process of finishing an edge of the pressed laminate with an aluminum frame, and a process of installing a junction box for connecting the copper ribbon to an output cable. 
     Typically, the solar cell module is installed without a reflection plate, or even when the reflection plate is provided, the reflection plate is arranged to form a predetermined angle with a solar cell panel. Since an incident angle of solar light is continuously varied as time elapses while the reflection plate arranged as described above is fixed, a reflection effect of the reflection plate may be varied according to time, the effect of the reflection plate may be limited to a specific time zone, and even shadow may be generated on the solar cell panel by the reflection plate to degrade a power generation efficiency. 
     RELATED ART DOCUMENT 
     Korean Patent Registration No. 0090752 
     DISCLOSURE OF THE INVENTION 
     Technical Problem 
     An object of present invention is to provide a solar cell module preventing shadow by a reflection plate, which may be generated according to a solar path variation, to improve a power generation efficiency and a method for adjusting the reflection plate of the solar cell module. 
     Another object of present invention is to provide a solar cell module capable of increasing a power generation quantity per each installation area and/or per each solar cell panel to allow an efficient and economical solar cell power generation. 
     Technical Solution 
     In a first aspect of the present invention to achieve the objects, a solar cell module includes a solar cell panel and a reflection plate connected to and disposed on an edge of the solar cell panel, and an angle between the reflection plate and a surface of the panel is varied. 
     As described above, the angle between the reflection plate connected to and disposed on the solar cell panel and the solar cell panel may be varied according to a solar path variation to increase a solar-light power generation efficiency. 
     In the first aspect of the present invention, the reflection plate may include a first reflection plate disposed at the east and a second reflection plate disposed at the west when the panel faces the south, and an angle between a surface of the panel and a surface of the first reflection plate and an angle between the surface of the panel and a surface of the second reflection plate may be simultaneously or individually varied. 
     In the first aspect of the present invention, the angle between the reflection plate and a surface of the panel may be varied along a solar path variation. 
     In the first aspect of the present invention, the angle between the reflection plate and the surface of the panel may be varied in a range from 60° to 180°. 
     The solar cell panel of the present invention may be disposed to face the south. For example, the first reflection plate disposed at the east is parallel to the panel and completely unfolded to form 180° at the time of sunrise, and the second reflection plate disposed at the west that is the opposite side may be inclined by 60° to the panel to concentrate the solar light. When the angle is less than 60°, an area receiving the solar light may be excessively small. 
     In the first aspect of the present invention, the reflection plate has a width greater than that of the panel. As the width of the reflection plate is formed to be greater than the width of the panel, a reflection quantity may increase to increase the power generation efficiency. 
     In the first aspect of the present invention, the reflection plate may include one or both of a third reflection plate connected to and disposed on an upper edge of the panel and a fourth reflection plate connected to and disposed on a lower edge of the panel. 
     As the reflection plate is connected to and disposed on the upper edge and/or the lower edge in addition to both sides of the solar cell module, a reflection rate may increase to increase the solar-light power generation efficiency. 
     In the first aspect of the present invention, an angle between the surface of the panel and a surface of the third reflection plate and an angle between the surface of the panel and a surface of the fourth reflection plate may be simultaneously or individually varied. 
     In the first aspect of the present invention, the solar cell module may further include an illuminance sensor, and as a motor configured to vary the angle is connected to the reflection plate, the motor may be driven to rotate the reflection plate so that illuminance is maximized by using the illuminance sensor. 
     Particularly, while an internal angle α 5  between the first reflection plate and the second reflection plate is maintained to be 60°, and maximum illuminance is maintained by the illuminance sensor, the angle of each of the first reflection plate and the second reflection plate may be adjusted. As the angle α 1  and α 2  formed with the panel according to the solar path variation while maintaining the internal angle between the first reflection plate and the second reflection plate to be constant, a power generation quantity may be maximized. As described above, as the internal angle is constantly maintained, the first and second reflection plates may be symmetric to incident light when the solar path is varied, and an incident angle and an incident quantity of the solar light incident to the surface of the panel may be uniformly adjusted and optimized to increase the power generation quantity. 
     In a second aspect of the present invention to achieve the objects, a method for adjusting the reflection plate of the solar cell module according to the first aspect includes adjusting the angle between the reflection plate and the surface of the panel so that solar light is always incident to a surface of the reflection plate. 
     When shadow is generated by the reflection plate according to the solar path variation, the solar cell efficiency may decrease, which may be prevented by adjusting the angle of the reflection plate. 
     In the second aspect of the present invention, the method may further include: maintaining an angle of the surface of each of the first and second reflection plates with the surface of the panel to be 180° before 10 o&#39;clock in the morning, maintaining an angle of the surface of each of the first and second reflection plates with the surface of the panel to be 120° from 10 o&#39;clock in the morning to 2 o&#39;clock in the afternoon, and maintaining an angle of the surface of each of the first and second reflection plates with the surface of the panel to be 180° after 2 o&#39;clock in the afternoon. 
     In the second aspect of the present invention, the method may further include: maintaining an angle of the first reflection plate with the surface of the panel to be 180° and an angle of the second reflection plate with the surface of the panel to be 120° before 10 o&#39;clock in the morning, maintaining an angle of each of the first and second reflection plates with the surface of the panel to be 120° from 10 o&#39;clock in the morning to 2 o&#39;clock in the afternoon, and maintaining an angle of the first reflection plate with the surface of the panel to be 120° and an angle of the second reflection plate with the surface of the panel to be 180° after 2 o&#39;clock in the afternoon. 
     In the second aspect of the present invention, the angle between the reflection plate and the surface of the panel may be adjusted so that an internal angle between the first reflection plate and the second always forms 60°, and the solar light is always incident to the surface of the reflection plate. 
     In a third aspect of the present invention to achieve the objects, two or more solar cell panels may be provided, and the reflection plate may be disposed at one side or both sides of the solar cell panels in a direction crossing a virtual central line between the two or more solar cell panels. 
     In a fourth aspect of the present invention to achieve the objects, two or more solar cell panels may be provided, the two or more solar cell panels may be arranged to face each other such that a solar-light incident surface of one solar cell panel is inclined at a predetermined angle to a solar-light incident surface of another solar cell panel, the reflection plate may be disposed at one side or both side of the solar cell panels facing each other in a direction crossing a virtual central line between the solar cell panels facing each other. 
     In the third aspect or fourth aspect of the present invention, the solar cell module may further include a reflection plate disposed on one or all of both edges of the two or more solar cell panels that are consecutively arranged in a direction parallel to the virtual central line. 
     In the fourth aspect of the present invention, the predetermined angle may be greater than 0° and less than 180°. 
     In the fourth aspect of the present invention, in the two or more solar cell panels, one ends of two adjacent solar cell panels may be connected through a connection shaft, and the reflection plates arranged in the direction crossing the virtual central line may contact each other at the connection shaft or be spaced a predetermined distance from each other. 
     In the third aspect or fourth aspect of the present invention, the two or more solar cell panels may include a support configured to support the reflection plate. 
     In the third aspect or fourth aspect of the present invention, the two or more solar cell panels may be connected in the form of ∧ or ∨, and as the solar cell panels connected in the form of ∧ or ∨ are arranged so that one of the ∧ shape and the ∨ shape is consecutively arranged or both of the ∧ shape and the ∨ shape are mixed, the solar-light incident surfaces may face each other. 
     In the third aspect or fourth aspect of the present invention, the reflection plate may be additionally disposed on a portion connected in the form of ∧ or ∨. 
     In the third aspect or fourth aspect of the present invention, the reflection plate may have a shape of one of a flat surface, a curved surface, or a bent surface, or a combination thereof. 
     In the third aspect or fourth aspect of the present invention, the solar cell module may further include an angle adjusting unit configured to adjust an inclination of the reflection plate. 
     Advantageous Effects 
     The solar cell module including the reflection plate and the method for adjusting the reflection plate according to an embodiment of the present invention may prevent the shadow by the reflection plate, which is generated according to the solar path variation, to increase the power generation efficiency of the solar cell module. 
     The solar cell module according to another embodiment of the present invention may allow the solar light reflected by the adjacent solar cell panels or reflection plates to be re-absorbed in addition to the solar light directly incident to the panel through the arrangement of the solar cell panels and various reflection plates to achieve the efficient and economical solar cell power generation. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic view of a solar cell module according to a first embodiment of the present invention. 
         FIG.  2    is a view for explaining an angle variation of a reflection plate in the solar cell module according to the first embodiment of the present invention. 
         FIG.  3    is a schematic view of a solar cell module according to a second embodiment of the present invention. 
         FIG.  4    is a view for explaining an angle variation of a reflection plate according to a solar path variation in a solar cell module according to a fifth embodiment of the present invention. 
         FIG.  5    is a view for explaining an angle variation of a reflection plate according to a solar path variation in a solar cell module according to a sixth embodiment of the present invention. 
         FIG.  6    is a view for explaining an angle variation of a reflection plate according to a solar path variation in a solar cell module according to a seventh embodiment of the present invention. 
         FIG.  7    is a plan view and a side view of a solar cell module according to an eighth embodiment of the present invention. 
         FIG.  8    is a perspective view of the solar cell module according to the eighth embodiment of the present invention. 
         FIG.  9    is a view exemplarily illustrating a shape of a reflection plate attached to the solar cell module. 
         FIG.  10    is a view illustrating a state in which a solar cell module according to the eighth embodiment of the present invention is installed on a structure such as a fence. 
         FIG.  11    is a plan view and a side view of a solar cell module according to a ninth embodiment of the present invention. 
         FIG.  12    is a perspective view of a solar cell module according to the ninth embodiment of the present invention. 
         FIG.  13    is a view illustrating a state in which the solar cell module according to the ninth embodiment of the present invention is installed on a structure such as a fence. 
         FIG.  14    is a plan view and a side view of a solar cell module according to a tenth embodiment of the present invention. 
         FIG.  15    is a plan view and a side view of a solar cell module according to an eleventh embodiment of the present invention. 
         FIG.  16    is a side view of a solar cell module according to a twelfth embodiment of the present invention. 
         FIG.  17    is a side view of a solar cell module according to a thirteenth embodiment of the present invention. 
     
    
    
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, the configuration and effects of embodiments of the present invention will be described with reference to the accompanying drawings. 
     Hereinafter, detailed descriptions related to well-known functions or configurations will be ruled out in order not to unnecessarily obscure subject matters of the present invention. Furthermore, when it is described that one comprises (or includes or has) some elements, it should be understood that it may comprise (or include or has) only those elements, or it may comprise (or include or have) other elements as well as those elements if there is no specific limitation. 
     First Embodiment 
       FIG.  1    is a schematic view of a solar cell module according to a first embodiment of the present invention, and  FIG.  2    is a view for explaining an angle variation of a reflection plate in the solar cell module according to the first embodiment of the present invention. 
     Referring to  FIGS.  1  and  2   , the solar cell module according to the first embodiment of the present invention includes a solar cell panel  100  having a rectangular shape, a first reflection plate  210  and a second reflection plate  220 , which are disposed on both edges of the solar cell panel  100 , respectively, and an angle adjusting device  300  adjusting and fixing an angle of each of the first reflection plate  210  and the second reflection plate  220  with respect to the solar cell panel  100 . 
     An angle α 1  and α 2  between the solar cell panel  100  and each of the first reflection plate  210  and the second reflection plate  220  may be varied, and the variable angel may be varied in a range from 60° to 180°. 
     The angle adjusting device  300  may manually or automatically move and have a hinge structure to rotate. Also, a friction force may be applied to be fixed at a desired angle. Although angle adjustment and fixing are made by only the hinge structure in  FIG.  1   , a separate fixing structure may be provided in addition to the hinge structure. 
     As illustrated in  FIG.  2   , at a side at which the solar cell panel  100  and each of the first reflection plate  210  and the second reflection plate  220  are folded, a width d 2  of each of the first reflection plate  210  and the second reflection plate  220  may be greater than a width d 1  of the solar cell panel  100  to increase an incident amount of solar light. 
     Second Embodiment 
       FIG.  3    is a schematic view illustrating a solar cell module according to a second embodiment of the present invention. 
     Referring to  FIG.  3   , the solar cell module according to the second embodiment of the present invention additionally include a third reflection plate  230  and a fourth reflection plate  240 , which are installed on an upper portion and a lower portion of the solar cell panel  100 , respectively, in addition to the first reflection plate  210  and the second reflection plate  220 , which are disposed on the both sides of the solar cell panel  100 , respectively. The third reflection plate  230  and the fourth reflection plate  240  may be varied with respect to the solar cell panel  100 . Although the reflection plate is installed all of the upper and lower portions in  FIG.  3   , the reflection plate may be installed on only one of the upper and lower portions. 
     An angle of each of the third reflection plate  230  and the fourth reflection plate  240  with respect to the solar cell panel  100  may maintain 120° continuously during solar-light power generation. The maintaining of the angle of 120° is preferred to increase an incidence area of solar light and increase incidence of solar light to the solar cell panel  100  through reflection although shadow caused by the solar light is not generated when an angle α 3  and α 4  of the third reflection plate  230  and the fourth reflection plate  240  is not an acute angle. 
     Third Embodiment 
     A solar cell module additionally includes an illuminance sensor for measuring light-sensitivity and connects each of the reflection plates  210  and  220  with a rotation motor (not shown) to rotate with respect to the solar cell panel  100  so that a signal of the illuminance sensor is applied, and the reflection plates  210  and  220  rotate by an electrical signal. Here, the rotation motor may be adjusted such that a driving shaft thereof is mechanically connected to the reflection plates  210  and  220 , and applied to, e.g., a configuration according to twelfth or thirteenth embodiment below. 
     Fourth Embodiment 
     A power generation efficiency is evaluated after the solar-light power generation is performed by using the solar cell module according to the first embodiment of the present invention as follows. 
     The solar cell panel  100  is arranged to face the south, the angle α 1  and α 2  between a top surface of each of the first reflection plate  210  and the second reflection plate  220  and a top surface of the solar cell panel  100  is maintained to be 180° before 10 o&#39;clock, the angle between the top surface of each of the first reflection plate  210  and the second reflection plate  220  and the top surface of the solar cell panel  100  is maintained to be 120° from 10 o&#39;clock to 14 o&#39;clock, and the angle between the top surface of each of the reflection plates and the top surface of the panel is maintained to be 180° after 14 o&#39;clock. 
     Fifth Embodiment 
     The solar cell panel  100  is arranged to face the south, the angle between the first reflection plate  210  that is disposed at the east among the reflection plates and the top surface of the solar cell panel  100  is maintained to be 180° before 10 o&#39;clock, the angle between the second reflection plate  220  that is disposed at the west among the reflection plates and the top surface of the solar cell panel  100  is maintained to be 120°, the angle between the top surface of each of the first reflection plate  210  and the second reflection plate  220  and the top surface of the solar cell panel  100  is maintained to be 120° from 10 o&#39;clock to 14 o&#39;clock, the angle between the first reflection plate among the reflection plates and the top surface of the solar cell panel  100  is maintained to be 120° after 14 o&#39;clock, and the angle between the second reflection plate among the reflection plates and the top surface of the solar cell panel is maintained to be 180° after 14 o&#39;clock. The method for varying the angle of the reflection plate is described in  FIG.  4   . As illustrated in  FIG.  4   a   , the solar-light power generation is performed by maintaining the angle α 1  to be 180° because the first reflection plate  210  is completely unfolded before 10 o&#39;clock and allowing the second reflection plate to maintain the angle α 2  of 120°. Thereafter, the solar-light power generation may be performed by maintaining all of the angles α 1  and α 2  to be 120° from 10 o&#39;clock to 14 o&#39;clock, i.e., the time of the southing of the sun as illustrated in  FIG.  4   b    and allowing the first reflection plate  210  to maintain the angle α 1  of 120° and the second reflection plate  220  to have the completely unfolded angle α 2  of 180° as illustrated in  FIG.  4     c.    
     Sixth Embodiment 
     For each time, before 9:30, 9:30, 11:30, 13:30, and after 13:30, the angles α 1  and α 2  of the first reflection plate  210  and the second reflection plate  220  are adjusted. The angle α 1  between the first reflection plate  210  and the top surface of the solar cell panel  100  maintains 180° before 9:30, 140° from 9:30 to 11:30, 100° from 11:30 to 13:30, and 100° after 13:30. Also, the angle α 2  between the second reflection plate  220  and the top surface of the solar cell panel  100  maintains 180° before 9:30, 140° from 9:30 to 11:30, 100° from 11:30 to 13:30, and 100° after 13:30. 
     The method for varying the angle of the reflection plate is illustrated for each step in  FIG.  5   . The angle between the first reflection plate and the second reflection plate before 9:30 is illustrated in  FIG.  5   a   , the angle from 9:30 to 11:30 is illustrated in  FIG.  5   b   , the angle from 11:30 to 13:30 is illustrated in  FIG.  5   c   , and the angle after 13:30 is illustrated in  FIG.  5     d.    
     Seventh Embodiment 
     The first reflection plate  210  and the second reflection plate  220  rotate to have maximum illuminance according to movement of a solar path in a state in which an internal angle α 5  between the first reflection plate  210  and the second reflection plate  220  is maintained to be 60° by using the solar cell module according to the third embodiment. This is illustrated in  FIG.  6   . That is, the internal angle α 5  between the first reflection plate  210  and the second reflection plate  220  is maintained to be 60° while varying the angle α 1  between the first reflection plate  210  and the solar cell panel  110  and the angle α 2  between the second reflection plate  220  and the solar cell panel  110  to be different from each other according to a variation of the solar path as in  FIGS.  6   a    to  6   d.    
     First Comparative Example 
     The solar-light power generation is performed under the same environment as the present invention in a state in which the reflection plate is not installed on the solar cell panel for comparison with the embodiments 4 to 7 of the present invention. 
     Second Comparative Example 
     In a second comparative example, the power generation is performed in a state in which the angle between the top surface of each of the first reflection plate  210  and the second reflection plate  220  and the top surface of the solar cell panel  100  is fixed to 120° regardless of the solar path by using the solar cell module according to the first embodiment. 
     Results obtained after the solar-light power generation according to each of the embodiments 4 to 7 and the comparative examples 1 and 2 is performed are shown in table 1 below. In the table 1 below, a rate of increase (%) represents a power generation quantity increased in comparison with the comparative example 1 in which the reflection plate is not installed on the solar cell panel. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                 Comparative 
                 Comparative 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
               
               
                 Classification 
                 example 1 
                 example 2 
                 4 
                 5 
                 6 
                 7 
               
               
                   
               
             
            
               
                 Rate of 
                 — 
                 −1.2~3.1 
                 14.6~15.5 
                 21.6~24.3 
                 22.6~25.6 
                 27.5~33.9 
               
               
                 increase 
               
               
                 (%) 
               
               
                   
               
            
           
         
       
     
     As shown in the table 1 above, it may be known that the power generation quantity of the embodiments 3 to 7 in which the angle of the reflection plate is varied according to the variation of the solar path increases in comparison with the Comparative example 2 in which the reflection plate is not installed or the angle of the reflection plate is fixed. Particularly, it may be known that the power generation quantity of the embodiment 7 in which the angle of the reflection plate is varied a plurality of times so that the solar light has greatest illuminance remarkably increases. 
     Eighth Embodiment 
       FIG.  7    is a plan view and a side view of a solar cell module according to an eighth embodiment of the present invention,  FIG.  8    is a perspective view of the solar cell module according to the eighth embodiment of the present invention,  FIG.  9    is a view exemplarily illustrating a shape of the reflection plate attached to the solar cell module, and  FIG.  10    is a view illustrating a state in which the solar cell module according to the eighth embodiment of the present invention is installed on a structure such as a fence. 
     As illustrated in  FIGS.  7  to  10   , a solar cell module  10  according to the eighth embodiment of the present invention includes a plurality of solar cell panels  11 , a reflection plate  12 , and a support  13 . 
     The plurality of solar cell panels  11  are arranged to face each other in such a manner that an internal angle between a solar-light incident surface of one panel and a solar-light incident surface of another panel adjacent thereto form a predetermined angle (about 90° in the drawing). 
     Also, as illustrated in  FIG.  8   , each of the solar cell panels  11  is fixed to the support  13  through a connection member  14  extending in a longitudinal direction thereof while forming a predetermined angle by a method such as welding or coupling by a bolt. 
     Although the angle between the solar cell panels  11  is set to about 90° in the eighth embodiment of the present invention, an angle (θ 1 ) between the adjacent solar cell panels  11  may be adjusted in a range greater than 0° less than 180°. 
     Also, the connection member  14  may physically connect the solar cell panels  11  and simultaneously allow the solar cell panels  11  to be bent. For example, a mechanical rotating unit such as a hinge for mechanically connecting in a bendable state may be used. For another example, a method for connecting the solar cell panels  11  in a bendable manner by disposing a flexible member such as plastic or fibers between the adjacent solar cell panels  11  and then attaching ends thereof by using a unit such as an adhesive, a bolt and a nut, and a Velcro. Also, a wire for connecting electricity generated from the solar cell panel  11  may be disposed in the connection unit  14 . 
     Also, the angle between the solar cell panels  11  may be controlled through an electrical signal by a method for fixing a shaft and the solar cell panels  11  to the shaft in a rotatable manner by using the connection member  14  and then adjusting the angle of the rotatably connected solar cell panels  11  through a driving unit such as a motor. 
     The reflection plate  12  is fixed to be inclined at a predetermined angle to the support  13  in a state of contacting or being spaced a predetermined distance from one end of the solar cell panel  11  in order to cross a central line (a virtual central line) between the solar cell panels  11  facing each other. The reflection plate  12  inclined as described above reflects incident solar light toward the solar cell panel  11  to increase a power generation efficiency of the solar cell panel  11 . 
     A reflection surface, which is a surface of the reflection plate  12 , may include a metal mirror surface, a glass mirror surface, or a plastic mirror surface to easily reflect the solar light. Alternatively, the reflection surface of the reflection plate  12  may be a transparent flat plate such as acryl or glass, on which a reflection material forms a predetermined pattern. 
     The pattern of the reflection material may be formed on a transparent substrate by using a coating method such as deposition using vacuum deposition or screen printing. In addition, a method for attaching a metal foil on a transparent substrate may be applied. 
     Here, since the substrate of the reflection plate  12  has a thermal resistance, an insulating material capable of restricting temperature increase may be used. 
     Also, a plurality of holes having various shapes may be formed in the reflection plate  12 , and these holes allows win to flow therethrough and thus reduce a pressure applied to the panel and the reflection plate, thereby reducing a damage risk of the solar cell module caused by strong wind. 
     As illustrated in  FIGS.  9   a  and  9   b   , a shape of the reflection plate  12  may be formed by a flat plate, a curved surface having a predetermined curvature, a plurality of bent surfaces, or a combination thereof. 
     Although the solar cell module  10  according to the eighth embodiment of the present invention may be installed on a separate holder, the solar cell module  10  may be directly installed on a metallic structure of a building or an apartment without the holder as illustrated in  FIG.  10   . 
     Ninth Embodiment 
       FIG.  11    is a plan view and a side view of a solar cell module according to a ninth embodiment of the present invention, and  FIG.  12    is a view illustrating a state in which the solar cell module according to the ninth embodiment of the present invention is installed on a structure such as a fence. 
     As illustrated in  FIGS.  11  and  12   , a solar cell module  20  according to the ninth embodiment of the present invention is characterized by additionally arranging a reflection plate  22 ′ on each of both ends of the arranged solar cell panels  21  in a direction parallel to a virtual central line to the solar cell module according to the eighth embodiment of the present invention. 
     The reflection plate  22 ′ has one side fixed in a method of lengthily extending from a rear surface of each of the both ends of the solar cell panel  21  to have the substantially same inclined angle as an inclined angle of the solar cell panel  21  and the other side fixed to the support  23  by using a coupling unit (not shown). 
     As described above, when the solar light is reflected in all of four directions, the power generation efficiency of the solar cell panel  21  may further improve. 
     Although the solar cell module  20  according to the ninth embodiment of the present invention may be also used to be installed on a separate holder, the solar cell module  20  may be directly installed on a metallic structure of a building or an apartment without the holder as illustrated in  FIG.  13   . 
     Tenth Embodiment 
       FIG.  14    is a plan view and a side view of a solar cell module according to a tenth embodiment of the present invention. 
     As illustrated in  FIG.  14   , a solar cell module  30  according to the tenth embodiment of the present invention is configured such that two adjacent solar cell panels  31  face each other in a V-shape, reflection plates  31  are arranged in a direction parallel to a virtual central line of the solar cell panel  31 , and a support  33  for supporting the solar cell panels  31  is provided in the solar cell module according to the eighth embodiment of the present invention. Also, the solar cell module  30  is characterized by additionally arranging a A-shaped reflection plate  32 ′ extending lengthily in a longitudinal direction thereof between a V-shape and a V-shape after the V-shape and the V-shape of the plurality of solar cell panels  31  instead of being directly connected. 
     Although the reflection plate  32 ′ is fixed to an upper end of the solar cell panel  31  and forms the A-shape, the embodiment of the present invention is not limited to the shape of the reflection plate  32 ′. As described above, reflected light of the solar light may be provided uniformly between the solar cell panels  31  by the added reflection plate  32 ′. 
     Eleventh Embodiment 
       FIG.  15    is a plan view and a side view of a solar cell module according to an eleventh embodiment of the present invention. 
     As illustrated in  FIG.  15   , a solar cell module  40  according to the eleventh embodiment of the present invention is characterized by additionally arranging a reflection plate  42  crossing a virtual central line in the solar cell module according to the tenth embodiment of the present invention. 
     Twelfth Embodiment 
       FIG.  16    is a side view illustrating a solar cell module according to a twelfth embodiment of the present invention. 
     As illustrated in  FIG.  16   , a solar cell module  50  according to the twelfth embodiment of the present invention allows an installation angle of the reflection plate  12  in the solar cell module according to the eighth embodiment of the present invention to be adjusted by using a motor. 
     The solar cell module  50  according to the twelfth embodiment of the present invention includes a plurality of solar cell panels  51 , a reflection plate  52 , a support  53  for supporting the solar cell panels  5 , a connection member  54  of the solar cell panels, and an angle adjusting unit  55  for adjusting an angle of the reflection plate  52 . 
     In the solar cell module  50  according to the twelfth embodiment of the present invention, the reflection plate  52  is not fixed to the support  53  to adjust the angle unlike the first embodiment. 
     Also, the angle adjusting unit  55  include a motor  55   a  fixed to one side of the support  53 , a plate-shaped first angle adjusting member  55   b  connected to the motor  55   a  in a rotatable manner, and a second angle adjusting member  55   c  fixed to the first angle adjusting member  55   b  to form a predetermined angle and determining a base inclined angle of the reflection plate  52 . 
     As illustrated in  FIG.  17   , an inclination of the reflection plate  52  with respect to the solar cell panel  51  may be varied through a process of increasing or decreasing an angle with the first angle adjusting member  55   b  through an operation of the motor  55   a.    
     Through this, an optimized state may be maintained by adjusting a quantity of light incident to the solar cell panel  51  through the reflection plate  52  and adjusting an inclination of the reflection plate  52  in consideration of the altitude of the sun. Here, the motor  55   a  may be controlled in a wired or wireless manner by using a computer including a calculation unit and a storage unit. When wireless control is necessary, a receiving unit capable of receiving a control signal in the wireless manner may be provided to the motor. As the motor  55   a  operates by providing the control signal for each predetermined time based on at least one piece of information selected from the altitude of the sun, a sunrise time, and a sunset time, which are stored in the storage unit, the reflection plate  52  may be adjusted to have an optimized inclined state at the corresponding time zone. 
     Although the solar cell module  50  according to the twelfth embodiment of the present invention has a structure of increasing or decreasing the angle between the reflection plates  52  through the motor  51 , a method for controlling the inclination by rotating two first angle adjusting members  55   b  for fixing the reflection plate in one direction may adjust the angle instead of adjusting the angle between the reflection plates  52 . 
     Thirteenth Embodiment 
       FIG.  17    is a side view of a solar cell module according to a thirteenth embodiment of the present invention. 
     As illustrated in  FIG.  17   , a solar cell module  60  according to the thirteenth embodiment of the present invention allows an installation angle of the reflection plate  12  in the solar cell module according to the eighth embodiment of the present invention to be adjusted manually. 
     The solar cell module  60  according to the thirteenth embodiment of the present invention includes a plurality of solar cell panels  61 , a reflection plate  62 , a support  63  for supporting the solar cell panels  61 , a connection member  64  of the solar cell panels, and an angle adjusting unit  65  for adjusting an angle of the reflection plate  62 . 
     The angle adjusting unit  65  include a housing  65   a  having one side fixed to the support  63 , a bar-shaped first angle adjusting member  65   b  supported by the housing  65   a  in a rotatable manner, and a second angle adjusting member  65   c  fixed to the first angle adjusting member  65   b  to form a predetermined angle and determining a base inclined angle of the reflection plate  62 . 
     The reflection plate  62  is fixed to one end of the second angle adjusting member  65   c  through a coupling unit such as a bolt or an attaching unit such as an adhesive instead of being fixed to the support  63  for angle adjustment unlike the eighth embodiment. 
     A rotation support  65   d  for supporting the first angle adjusting member  65   b  in a rotatable manner is arranged on each of both sides of the housing  65   a , and an angle adjusting rope  65   e  is connected to an end of the first angle adjusting member  65   b.    
     The solar cell module  60  according to the thirteenth embodiment of the present invention may differently adjust an angle of the first angle adjusting member  65   b  supported by the rotation support  65   d  by releasing or pulling the angle adjusting rope  65   e  and, through this, adjust an inclination of the reflection plate  62  connected thereto.