JP2015223065A - Solar battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery module that has a high power generation amount per unit area in the area of the solar battery module.SOLUTION: Plural strings each having cells 10 arranged in a first direction and electrically connected in series are arranged in a second direction. In two strings adjacent to each other in the second direction, the cells 10 located at the end portions of the same direction in the first direction are electrically connected to each other in series by a bus bar member 21 having electrical conductivity to thereby configure a solar battery array. The outer shape of a photodetection face side protection member is a rectangular shape having four sides. One side out of the four sides, at which array end portion solar battery cells at both the end portions of the array are arranged extends to the outside of a non-photodetection face side protection member 32 in the first direction, and the width in the first direction of an extension area where the photodetection face side protection member 31 extends is set to be shorter than the width of the cells 10. The busbar member 21 disposed at one side is disposed on a side of the non-photodetection face side protection member 32 of the extension area.

Description

  The present invention relates to a solar cell module.

  A solar cell module of a crystalline system using a wafer mainly made of silicon (Si), or a compound thin film system such as Si or CIS, has a front and rear surface made of a translucent protective member such as glass. Has been developed.

  For example, Patent Document 1 discloses a solar cell module in which a terminal box does not require a special shape and an insulation failure between an outer frame and a connection lead is eliminated. That is, in the solar cell module described in Patent Document 1, one end side portion of the front surface member is configured to extend outward from the back surface member, and the connection line for outputting the generated current is provided on the back surface on one side. It is shown that the insulation between the connecting line and the outer frame can be ensured by forming it so as to extend outward from the member.

Japanese Patent No. 5404987

  However, in the solar cell module described in Patent Document 1, since the terminal box is disposed in the region where the solar cell is originally disposed between the front surface member and the back surface member, the power generation is wasted. The area which does not occur will arise. In addition, even if a dummy cell or a shielding part is provided on the surface member in this region, it does not change that the region does not contribute to power generation. Therefore, there has been a problem that the amount of power generation per unit area in the area of the solar cell module is reduced.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the solar cell module excellent in the electric power generation amount per unit area in the area of a solar cell module.

  In order to solve the above-described problems and achieve the object, a solar cell module according to the present invention includes a transparent cell in which a plurality of solar cells arranged on the same plane are arranged with a plane direction parallel to the same plane. A solar cell module disposed between a rectangular first protective member having a light property and a rectangular second protective member, wherein the plurality of solar cells are arranged in a first direction and are electrically Are connected in series to form a plurality of solar cell strings, and the plurality of solar cell strings are arranged in a second direction perpendicular to the first direction and adjacent to the second direction. In the two solar cell strings, the solar cells located at the end portions in the same direction in the first direction are electrically connected in series by a conductive connecting member, A solar cell array in which a plurality of solar cell strings are electrically connected in series is configured, and the outer shape of the first protective member is an array end of both ends of the solar cell array among four sides of a rectangular shape One side on the side where the solar cells are arranged extends outside the second protective member in the first direction, and the width in the first direction of the extended region where the first protective member extends is The connection member formed shorter than the width of the solar cell and disposed on the one side is disposed on the second protection member side of the first protection member in the extension region. And

  According to the present invention, there is an effect that it is possible to obtain a solar cell module excellent in the amount of power generation per unit area in the area of the solar cell module.

FIG. 1 is a plan view showing the configuration of the solar cell module according to the embodiment of the present invention, and is a plan view of the solar cell module as viewed from the non-light-receiving surface side opposite to the light-receiving surface side. FIG. 2 is a cross-sectional view showing the structure of the solar cell module according to the embodiment of the present invention, and is a cross-sectional view of the main part taken along the line AA of FIG. FIG. 3 is a plan view showing the configuration of the solar cell array constituting the solar cell module according to the embodiment of the present invention. FIG. 4 is a plan view of the solar cell panel as seen from the back side, with the outer frame, terminal box and cable connector removed from the solar cell module according to the embodiment of the present invention. FIG. 5 is a cross-sectional view of the main part showing the structure of the solar cell panel according to the embodiment of the present invention, and is a cross-sectional view of the main part taken along line BB of the solar cell panel of FIG. FIG. 6 is a plan view showing a solar cell laminate panel according to an embodiment of the present invention in which a terminal box is attached to the solar cell panel shown in FIG. FIG. 7 is a cross-sectional view of main parts showing the structure of the solar cell laminate panel according to the embodiment of the present invention, and is a cross-sectional view of main parts taken along the line CC of the solar cell laminate panel of FIG. FIG. 8 is a schematic diagram showing an electrical connection relationship among the bus bar member, the bypass diode, and the cable connector. FIG. 9: is the top view which looked at the photovoltaic cell concerning embodiment of this invention from the light-receiving surface side. FIG. 10: is the top view which looked at the photovoltaic cell concerning embodiment of this invention from the non-light-receiving surface side (back surface side). FIG. 11: is principal part sectional drawing which shows the structure of the photovoltaic cell concerning embodiment of this invention, and is DD sectional drawing in FIG.

  Embodiments of a solar cell module according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited to the following description, In the range which does not deviate from the summary of this invention, it can change suitably. In the drawings shown below, the scale of each member may be different from the actual scale for easy understanding. The same applies between the drawings.

Embodiment FIG. 1 is a plan view showing a configuration of a solar cell module 100 according to the present embodiment, and is a plan view of the solar cell module 100 as viewed from the non-light-receiving surface side (back surface side) opposite to the light-receiving surface side. FIG. FIG. 2 is a cross-sectional view showing the structure of the solar cell module 100 according to the present embodiment, and is a main-portion cross-sectional view taken along the line AA in FIG. FIG. 3 is a plan view showing the configuration of the solar cell cell array 20a constituting the solar cell module 100 according to the present embodiment.

  The solar cell module 100 according to the present embodiment includes a solar cell array 20a in which a plurality of solar cells 10 are electrically connected in series, a light-receiving surface side protection member 31, a non-light-receiving surface side protection member 32, and a resin seal. The outer shape in the surface direction of the solar cell module 100 is formed in a rectangular shape including the stopper 33. Then, the solar cell string 20s is disposed on the light receiving surface side protection member 31 disposed on the front surface side (light receiving surface side) of the solar cell module 100 and on the side opposite to the light receiving surface (back surface side) of the solar cell module 100. It is sealed in a resin sealing material 33 sandwiched between the non-light-receiving surface side protection member 32. In this solar cell module 100, the light L enters from the light receiving surface side protection member 31 side.

  Moreover, in the outer peripheral part in the surface direction of the solar cell module 100, the outer frames 40 used for fixing the solar cell module 100 and the like are arranged on the four outer peripheries of the solar cell module 100 via sealing materials, respectively. . For example, an adhesive or a resin sealing material is used as the sealing material.

  On the back surface side of the solar cell module 100, a terminal box 41 for taking out the output generated by the solar cells 10 is sealed near the inside of the outer frame 40 on one end side in the long side direction of the outer shape (rectangular shape). It is arranged through the material. The terminal box 41 is configured to have an insulating property. For example, an adhesive or a resin sealing material is used as the sealing material. The terminal box 41 is connected to a cable connector 42 that is a terminal portion connected to the cable 43 in order to extract power to the outside through the cable 43 that is a power line.

  The light receiving surface side protection member 31 is made of a light-transmitting material, and is disposed on the light receiving surface side of the solar cell string 20s to protect the light receiving surface side of the solar cell string 20s. As a material of the light receiving surface side protection member 31, for example, glass or translucent plastic is used. The outer shape in the surface direction of the light-receiving surface side protection member 31 is a rectangular shape corresponding to the rectangular shape that is the outer shape of the solar cell module 100.

  The non-light-receiving surface side protection member 32 is made of, for example, a light-transmitting material, and is disposed on the non-light-receiving surface side (back surface side) opposite to the light-receiving surface of the solar cell string 20s, so that the back surface of the solar cell string 20s. Protect the side. As a material of the non-light-receiving surface side protection member 32, for example, glass or translucent plastic is used. Moreover, as a material of the non-light-receiving surface side protection member 32, a transparent film such as PET may be used. In the case where the solar battery cell 10 is a single-sided power generation type solar battery, the non-light-receiving surface side protection member 32 is not particularly limited as to whether or not it has translucency. However, when the solar battery cell 10 is a double-sided power generation type solar battery, the non-light-receiving surface side protection member 32 also needs to have translucency.

  The outer shape in the surface direction of the non-light-receiving surface side protection member 32 is a rectangular shape that is close to the rectangular shape that is the outer shape of the solar cell module 100 and the light-receiving surface side protection member 31. However, in the non-light-receiving surface side protection member 32, the length of one pair of long sides of the two pairs of sides in the rectangular shape is configured to be shorter than that of the light-receiving surface side protection member 31.

  That is, the light receiving surface side protection member 31 and the non-light receiving surface side protection member 32 in the present embodiment are different in size, and the light receiving surface side protection member 31 is more than the non light receiving surface side protection member 32. Is also formed large. In the light-receiving surface side protection member 31 and the non-light-receiving surface side protection member 32 of the present embodiment, the light-receiving surface side protection member 31 and the non-light-receiving surface side protection member 32 are faced to form the solar cell module 100. When superposed in parallel, the long side of the light-receiving surface side protection member 31 extends outside the non-light-receiving surface side protection member 32 on the side where the terminal box 41 is provided to extract power. Largely formed. Therefore, the non-light-receiving surface side protection member 32 of the present embodiment is at least shorter in the long side direction than the light-receiving surface side protection member 31.

  Here, the outer shape of the light-receiving surface side protection member 31 is such that, in the surface direction of the light-receiving surface side protection member 31, one end side located in the long side direction out of the four rectangular sides is more than the non-light-receiving surface side protection member 32. Is also formed so as to extend outward. Further, the outer shape of the light-receiving surface side protection member 31 is such that the width in the long side direction of the extended region where the light-receiving surface side protection member 31 extends from the non-light-receiving surface side protection member 32 is larger than the width of the solar battery cell 10. Formed short. That is, in the long side direction of the light-receiving surface side protection member 31, the width of the long side of the light-receiving surface side protection member 31 extending outside the non-light-receiving surface side protection member 32 is shorter than the width of the solar battery cell 10. It will be lost. Therefore, from the viewpoint of protecting the solar cells 10, the solar cells 10 cannot be disposed in the region where the light receiving surface side protection member 31 extends outside the non-light receiving surface side protection member 32.

  In addition, the other three sides of the rectangular four sides of the light-receiving surface side protection member 31 are configured so that the light-receiving surface-side protection member 31 and the non-light-receiving surface-side protection member 32 form the solar cell module 100. Are formed so as to coincide with the non-light-receiving surface side protection member 32 when the surface directions are overlapped with each other in parallel.

  The resin sealing material 33 is not between the solar cell string 20 s and the light receiving surface side protection member 31, between the solar cell string 20 s and the non-light receiving surface side protection member 32, and at the light receiving surface side protection member 31. It is disposed on the surface on the light receiving surface side protection member 32 side and on the region where the non-light receiving surface side protection member 32 does not exist, that is, on the extension region. As a material of the resin sealing material 33, for example, a resin having translucency such as EVA, silicone, and urethane is used.

  The outer frame 40 is mainly composed of an aluminum alloy or the like, and is configured to have a hole (not shown) for fixing the solar cell module 100 to a structural material such as a gantry.

  Next, the configuration of the solar cell cell array 20a will be described. As shown in FIGS. 2 and 3, in the solar cell array 20a, a plurality of solar cells 10 arranged in a predetermined cell arrangement direction are electrically connected in series by an interconnector 30 that is a conductive connecting member. It has a plurality of solar cell strings 20s. The plurality of solar cells 10 are regularly arranged on substantially the same plane with a predetermined distance apart in a predetermined cell arrangement direction. Two solar cells 10 adjacent in the cell arrangement direction are electrically connected in series by the interconnector 30.

  In the present embodiment, six solar cell strings 20s in which ten solar cells 10 are electrically connected in series by the interconnector 30 in the cell arrangement direction are strings that are substantially perpendicular to the cell arrangement direction. They are regularly arranged in a matrix on substantially the same plane at a predetermined distance in the arrangement direction. Of the two solar cell strings 20s adjacent in the string arrangement direction, the solar cell 10 at one end in the cell arrangement direction in one solar cell string 20s and the cell in the other solar cell string 20s. The solar cells 10 at one end in the arrangement direction are electrically connected in series by a bus bar member 21 that is a conductive connecting member, thereby forming one long solar cell string 20s (solar cell array 20a). Has been.

  The solar cell string 20s is electrically connected by the bus bar member 21 only to one solar cell string 20s adjacent in the string arrangement direction at each end in the cell arrangement direction. More specifically, in the solar cell 10 at one end in the cell arrangement direction, for example, two interconnectors 30 connected to electrodes that are not electrically connected to the adjacent solar cell 10 in the cell arrangement direction. The solar cell 10 is provided so as to extend in the direction of the one end. The bus bar member 21 is connected to the interconnector 30. The bus bar member 21 is provided along the side direction of one end of the light receiving surface side protection member 31 in the cell arrangement direction, that is, along the short side direction of the light receiving surface side protection member 31.

  In the present embodiment, six solar cell strings 20s are electrically connected in series using the bus bar member 21b, the bus bar member 21c, the bus bar member 21d, the bus bar member 21e, and the bus bar member 21f. A solar cell string 20s is configured. In FIG. 3, the solar cell strings 20s in the first row from the bottom and the solar cell strings 20s in the second row from the bottom are electrically connected in series using a bus bar member 21b. Similarly, the solar cell strings 20s in the second row from the bottom and the third row from the bottom use the bus bar member 21c, and the solar cell strings 20s in the third row from the bottom and the fourth row from the bottom are the bus bars. The solar cell strings 20s in the fourth row from the bottom and the fifth row from the bottom using the member 21d are the solar cell strings in the fifth row from the bottom and the sixth row from the bottom using the bus bar member 21e. 20s are electrically connected in series with each other using a bus bar member 21f.

  A bus bar member 21a and a bus bar member 21g are connected to the solar cells 10 at both ends of one long solar cell string 20s (solar cell array 20a), respectively. When the cable connector 42 is connected to each of the bus bar member 21a and the bus bar member 21g, the electric power generated by the solar battery cell 10 is output to the outside through the cable 43. In addition, the cable connector 42 is connected to the cable 43, and mechanically and electrically connected to the connecting portion and mechanically and electrically connected to the bus bar member 21a or the bus bar member 21g. And a connection wiring part for outputting the electric power generated at 10.

  FIG. 4 is a plan view of the solar cell panel 110 as seen from the back side, with the outer frame 40, the terminal box 41, and the cable connector 42 removed from the solar cell module 100 according to the present embodiment. FIG. 5 is a main part sectional view showing the structure of the solar cell panel 110 according to the present embodiment, and is a main part sectional view taken along line BB of the solar cell panel of FIG. Here, as shown in FIGS. 4 and 5, the bus bar member 21 is an outer peripheral edge region of the light receiving surface side protection member 31, and the non-light receiving surface side protection member 32 overlaps in the surface direction of the light receiving surface side protection member 31. The non-light-receiving surface side protection member 32 side of the light-receiving surface side protection member 31 is disposed in a non-lighted region (extension region). That is, the bus bar member 21 is disposed in the outer peripheral edge region of the light receiving surface side protection member 31 on one end side in the cell arrangement direction. And in the arrangement | positioning area | region of the bus-bar member 21 in the surface direction of the light-receiving surface side protection member 31, the light-receiving surface side protection member 31 is arrange | positioned, but the non-light-receiving surface side protection member 32 is not arrange | positioned.

  The bus bar member 21 is sealed and protected by a resin sealing material 33 in the same manner as the solar cell array 20a. The resin sealing material 33 is provided with two openings 33a that reach the bus bar member 21a or the bus bar member 21g from the surface on the non-light-receiving surface side protection member 32 side. That is, the opening 33 a is provided at a position overlapping the bus bar member 21 a or the bus bar member 21 g in the surface direction of the light receiving surface side protection member 31. The cable connector 42 is mechanically and electrically connected to each of the bus bar member 21a and the bus bar member 21g through the opening 33a, whereby the output generated by the solar battery cell 10 can be taken out.

  FIG. 6 is a plan view showing a solar cell laminate panel 120 in which the terminal box 41 is attached to the solar cell panel 110 shown in FIG. FIG. 6 shows a state where the solar cell laminate panel 120 according to the present embodiment is viewed from the non-light-receiving surface side. FIG. 7 is a main part cross-sectional view showing the structure of the solar cell laminate panel 120 according to the present embodiment, and is a main part cross-sectional view taken along the line CC of the solar cell laminate panel 120 of FIG. FIG. 8 is a schematic diagram showing an electrical connection relationship among the bus bar member 21, the bypass diode 45, and the cable connector 42.

  In the solar cell laminate panel 120, the terminal box 41 covering the region where the bus bar member 21 of the solar cell panel 110 is arranged in the surface direction of the light receiving surface side protection member 31 is used as a sealing material such as an adhesive or a resin sealing material. 44 is attached to the light-receiving surface side protection member 31 and the non-light-receiving surface side protection member 32.

  In the terminal box 41, a bypass diode 45 for diverting the current generated when any solar cell 10 is shaded in units of the solar cell string 20s is held by a holding member (not shown). Is provided. In a solar cell module, when some solar cells are shaded and are not exposed to sunlight and are in a non-power generation state, a current in the reverse direction is generated from the solar cells in a power generation state. Flow and cell may be destroyed. In order to prevent the solar cell from being destroyed by such a backflow current, a diode called a bypass diode for preventing a backflow current, that is, a rectifier for bypass at the time of reverse load is connected. By providing the bypass diode 45, current can flow in the solar cell array 20a so as to bypass the solar cell string 20s having the solar cells 10 in an unpowered state.

  In the present embodiment, the bypass diode 45a is attached via the connection wiring 46 so as to electrically connect the bus bar member 21a and the bus bar member 21c. A bypass diode 45b is attached via a connection wiring 46 so as to electrically connect the bus bar member 21c and the bus bar member 21e. Further, a bypass diode 45c is attached via a connection wiring 46 so as to electrically connect the bus bar member 21e and the bus bar member 21g. Thereby, even when the output of any of the solar cell strings 20s is reduced due to the influence of a shadow or the like, electric power can be taken out from the solar cell module 100.

  In addition, on the upper surface of the terminal box 41, two openings 41a are provided at positions corresponding to the bus bar member 21a and the bus bar member 21g connected to both ends of the solar cell array 20a. The opening 41a corresponds to the position of the opening 33a. And the cable connector 42 for taking out the output of the electric power generated in the photovoltaic cell 10 to the outside is disposed in the two openings 41a. The cable connector 42 is mechanically and electrically connected to the bus bar member 21a or the bus bar member 21g through the opening 33a.

  As shown in FIG. 7, the non-light-receiving surface side protection member 32 is shorter than the light-receiving surface side protection member 31, and the region where the bus bar member 21 is arranged (extension region) is covered with a terminal box 41. In addition, it is possible to prevent moisture from entering the region where the bus bar member 21 and the bypass diode 45 are provided, and to improve the moisture resistance of the solar cell module 100.

  Further, as shown in FIG. 7, by providing the terminal box 41 with a holding portion 41 b that contacts the end surface of the non-light-receiving surface side protection member 32, the movement of the non-light-receiving surface side protection member 32 in the cell arrangement direction is suppressed. be able to. Thereby, the shift | offset | difference of the cell arrangement direction of the non-light-receiving surface side protection member 32 by the vibration etc. during the construction work of the solar cell module 100 or after construction can be suppressed.

  Next, the configuration of the solar battery cell 10 will be described. FIG. 9 is a plan view of the solar battery cell 10 according to the present embodiment as viewed from the light receiving surface side. FIG. 10 is a plan view of the solar battery cell 10 according to the present embodiment as viewed from the non-light-receiving surface side (back surface side). FIG. 11 is a main part sectional view showing the configuration of the solar battery cell 10 according to the present embodiment, and is a DD sectional view in FIG. 9.

  As the solar cell 10, for example, a single-sided power generation type crystalline solar cell that has a substantially square shape in a planar direction and is a typical super straight type can be used. The solar cell is a solar cell substrate having a photoelectric conversion function, and an antireflection film 3 made of, for example, a silicon nitride film is formed on the light receiving surface side of a semiconductor substrate 7 having a pn junction. In the semiconductor substrate 7, an impurity diffusion layer (n-type impurity diffusion layer) 2 is formed by phosphorous diffusion on the light receiving surface side of the semiconductor substrate 1 made of, for example, p-type silicon. On the light receiving surface side and the back surface side of the semiconductor substrate 7, a light receiving surface bus electrode 52 and a back surface bus electrode 62 are formed as connection electrodes for bonding to the conductive connection member. In this solar cell, light L enters from the antireflection film 3 side.

  On the light-receiving surface side of the semiconductor substrate 7, a light-receiving surface electrode 5 having a comb shape formed by firing an electrode material containing silver and glass penetrates the antireflection film 3 and is an impurity diffusion layer (n-type impurity diffusion layer). 2) is electrically connected to 2. As the light receiving surface electrode 5, a plurality of long and narrow light receiving surface grid electrodes 51 for collecting photogenerated carriers from the semiconductor substrate 7 are provided side by side in the in-plane direction of the light receiving surface of the semiconductor substrate 7. A light receiving surface bus electrode 52 that is electrically connected to the light receiving surface grid electrode 51 and collects photogenerated carriers from the light receiving surface grid electrode 51 is arranged in the in-plane direction of the light receiving surface of the semiconductor substrate 7. Are provided so as to be substantially orthogonal to each other. The light receiving surface grid electrode 51 and the light receiving surface bus electrode 52 are electrically connected to the impurity diffusion layer 2 at the bottom surface.

  On the other hand, on the non-light-receiving surface side (back surface side) of the semiconductor substrate 7, a back surface insulating film 4 that is an insulating film is provided over the entire surface. By providing the back surface insulating film 4 on the back surface of the semiconductor substrate 7, defects on the back surface of the silicon substrate can be inactivated. A silicon nitride film or a silicon oxide film is used for the back surface insulating film 4.

  Further, on the non-light-receiving surface side (back surface side) of the semiconductor substrate 7, a back electrode 6 having a comb shape formed by baking an electrode material containing silver or aluminum and glass penetrates the back insulating film 4. And electrically connected to the semiconductor substrate 1. As the back surface electrode 6, similarly to the light receiving surface electrode 5, an elongated back surface grid electrode 61 that collects photogenerated carriers from the semiconductor substrate 7 is formed in the in-plane direction of the non-light receiving surface (back surface) of the semiconductor substrate 7. A plurality are provided side by side. Further, the back surface bus electrode 62 that is electrically connected to the back surface grid electrode 61 and collects photogenerated carriers from the back surface grid electrode 61 is arranged in the in-plane direction of the non-light-receiving surface (back surface) of the semiconductor substrate 7. Are provided so as to be substantially orthogonal to each other. The back surface grid electrode 61 and the back surface bus electrode 62 are electrically connected to the semiconductor substrate 7 at the bottom surface. The back grid electrode 61 is formed by firing an electrode material containing aluminum and glass, and the back bus electrode 62 is formed by firing an electrode material containing silver and glass (fired electrode).

  The configuration of the non-light-receiving surface side (back surface side) of the semiconductor substrate 7 is such that an aluminum (Al) layer functioning as a BSF (Back Surface Field) for preventing recombination of generated carriers is formed on the non-light-receiving surface (back surface). The structure may be a general crystalline silicon solar cell having a single-sided light receiving structure (single-sided power generation type structure) coated on the entire surface with a paste or the like. In this case, an electrode mainly composed of silver (Ag) or the like is formed in a dot-like or linear shape at a site where the interconnector is joined in the aluminum (Al) layer.

  The interconnector 30 is made of a conductive material, and is formed on the light-receiving surface bus electrode 52 formed on the light-receiving surface of one solar cell 10 and the back surface of another solar cell 10 adjacent to the solar cell 10. Adjacent solar battery cells 10 are electrically connected in series by being joined to the backside bus electrode 62 by solder. As the interconnector 30, for example, a good conductor such as copper or a copper wire with solder (tab wire) obtained by coating copper with solder can be used.

  Below, an example of the manufacturing method of the solar cell module 100 concerning this Embodiment comprised as mentioned above is demonstrated. First, the some photovoltaic cell 10 is produced by a well-known method. And as shown in FIG. 3, the solar cell array 20a is produced by electrically connecting the several photovoltaic cell 10 in series by the bus-bar member 21. As shown in FIG.

  Next, the solar cell array 20 a is installed on the light receiving surface side protection member 31 through the resin sealing material 33. Next, the non-light-receiving surface side protection member 32 is disposed on the solar cell cell array 20a via the resin sealing material 33 to form a laminate. Here, the outer shape in the surface direction of the non-light-receiving surface side protection member 32 is a rectangular shape that substantially corresponds to the rectangular shape that is the outer shape of the light-receiving surface side protection member 31. However, in the non-light-receiving surface side protection member 32, the length of one pair of long sides of the two pairs in the rectangular shape is shorter than that of the light-receiving surface side protection member 31.

  In the laminated body, in the positional relationship among the light receiving surface side protective member 31, the solar cell array 20a, and the non-light receiving surface side protective member 32 in the surface direction of the light receiving surface side protective member 31, as shown in FIG. Each member is laminated so that the bus bar member 21 is positioned in the outer peripheral edge region of the light receiving surface side protection member 31 on one end side in the direction. And the non-light-receiving surface side protection member 32 does not overlap in the arrangement | positioning area | region of the bus-bar member 21 in the surface direction of the light-receiving surface side protection member 31. FIG. One end side in the cell arrangement direction is the side where the solar cells 10 at both ends in the solar cell array 20a are arranged.

  And this laminated body is heat-pressed in a vacuum, for example. Thereby, each said member is laminated and integrated. Thereafter, the opening 33a is formed. Subsequently, the terminal box 41 and the outer frame 40 are attached. Thereby, the solar cell module 100 concerning this Embodiment is obtained.

  As described above, in the solar cell module 100 according to the present embodiment, the outer edge region on one end side in the cell arrangement direction of the light receiving surface side protection member 31 extends outward from the non-light receiving surface side protection member 32. The function of the bus bar member 21 and the terminal box 41 is arranged in the extended region. The width of the extending region in the cell arrangement direction is shorter than the width of the solar battery cell 10 and is a width in which the solar battery cell 10 cannot be disposed. Thereby, in the solar cell module 100, the useless space which does not contribute to electric power generation can be reduced, and the solar cell module excellent in the electric power generation amount per unit area in the area of the solar cell module 100 can be obtained.

  Moreover, in the solar cell module 100 concerning this Embodiment, when the light-receiving surface side protection member 31 and the non-light-receiving surface side protection member 32 are comprised with glass, in order to draw the electric power generated with the photovoltaic cell 10 outside. It is not necessary to make a hole through the connection line in the non-light-receiving surface side protection member 32. Thereby, in the solar cell module 100, the increase in cost can be suppressed and the cheap solar cell module 100 is realizable.

  Moreover, in the solar cell module 100 according to the present embodiment, by arranging the terminal box 41 and the cable 43 for taking out the output generated by the solar cell 10 to the outside, in the outer edge region of the light receiving surface side protection member 31, The solar cell module 100 can be configured so that there is nothing on the back surface of the solar cell 10 in appearance from the light receiving surface side. Thereby, even if the solar cell module 100 is applied to a building material (such as a facade) or a carport, the aesthetic appearance is not impaired, and the solar cell module 100 having an excellent aesthetic appearance can be realized.

  Furthermore, in the solar cell module 100 according to the present embodiment, when a double-sided light receiving structure (double-sided power generation type structure) is applied to the solar cell 10 included, the non-light-receiving surface side protection member 32 is a light shielding member. Therefore, it is possible to reduce in-plane variations in the amount of incident light on the solar cells 10 on the light receiving surface side protection member 31 side and the non-light reception surface side protection member 32 side. Thereby, the power generation efficiency of the solar cell module 100 can be improved.

  Moreover, in the solar cell module 100 according to the present embodiment, the area of the non-light-receiving surface side protection member 32 can be set to the minimum level necessary for protecting the solar cell cell array 20a, so that the cost is reduced. be able to.

  Therefore, according to this Embodiment, the solar cell module excellent in the electric power generation amount per unit area in the area of a solar cell module can be obtained.

  As described above, the solar cell module according to the present invention is useful for realizing a solar cell module excellent in power generation amount per unit area in the area of the solar cell module.

  DESCRIPTION OF SYMBOLS 1 Semiconductor substrate, 2 Impurity diffused layer, 3 Antireflection film, 4 Back surface insulating film, 5 Light receiving surface electrode, 6 Back surface electrode, 7 Semiconductor substrate, 10 Solar cell, 20 Solar cell string, 20a Solar cell array, 20s Sun Battery cell string, 21, 21a, 21b, 21c, 21d, 21e, 21f, 21g Bus bar member, 30 interconnector, 31 light receiving surface side protective member, 32 non-light receiving surface side protective member, 33 resin sealing material, 33a opening Part, 40 outer frame, 41 terminal box, 41a opening, 41b holding part, 42 cable connector, 43 cable, 44 sealing material, 45, 45a, 45b, 45c bypass diode, 46 connection wiring, 51 light receiving surface grid electrode, 52 Light receiving surface bus electrode, 61 Back surface grid electrode, 62 Back surface bus electrode, 00 solar cell module, 110 a solar cell panel, 120 solar cell laminate panels, L light.

Claims (6)

A plurality of solar cells arranged on the same plane are arranged between a rectangular first protective member and a rectangular second protective member having translucency arranged with the plane direction parallel to the same plane. A solar cell module arranged,
The plurality of solar cells are arranged in a first direction and electrically connected in series to form a plurality of solar cell strings,
The plurality of solar cell strings are arranged in a second direction perpendicular to the first direction, and two solar cell strings adjacent to the second direction are respectively in the same direction in the first direction. The solar cells located between the ends of the solar cells are electrically connected in series by a conductive connecting member, and a plurality of solar cell strings are electrically connected in series to constitute a solar cell array,
The outer shape of the first protective member is such that one of the four sides of the rectangular shape on the side where the array end solar cells at both ends of the solar cell array are arranged is more than the second protective member in the first direction. And the width in the first direction of the extended region where the first protective member extends is formed shorter than the width of the solar battery cell,
The connection member disposed on the one side is disposed on the second protection member side of the first protection member in the extension region;
A solar cell module characterized by. The connecting member is disposed on the same plane as the solar cell along the side direction of the one side;
The solar cell module according to claim 1. The other three sides of the four rectangular sides of the outer shape of the first protective member are formed to coincide with the outer shape of the second protective member;
The solar cell module according to claim 1 or 2. The extension region is covered with a terminal box that incorporates a connection structure that connects the connection member and a power line that outputs power generated by the solar cell to the outside.
The solar cell module according to any one of claims 1 to 3, wherein: The terminal box includes a plurality of reverse load bypass rectifiers that electrically connect the connection members adjacent in the second direction;
The solar cell module according to any one of claims 1 to 4, wherein: The solar battery cell is a double-sided power generation type solar battery,
The second protective member has translucency;
The solar cell module according to any one of claims 1 to 5, wherein:

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