JP4977333B2 - Concentrating solar cell module and concentrating solar cell device - Google Patents

Description

  The present invention relates to a concentrating solar cell module and a concentrating solar cell device, and more particularly to a concentrating solar cell module using a condensing lens for concentrating sunlight and a concentrating type incorporating the solar cell module. The present invention relates to a solar cell device.

  As a solar cell device for electric power, a concentrating solar cell that collects irradiated sunlight with a condensing lens and receives the collected sunlight with a light receiving surface of a solar cell element smaller than the irradiation area to extract electric power. The device has been put into practical use.

  According to such a concentrating solar cell device, the irradiated solar light is collected by the condensing lens, so that the solar cell element only needs to have an area capable of receiving the condensed light. That is, in the concentrating solar cell device, a solar cell element having a size smaller than the irradiation area of sunlight is sufficient, and by reducing the size of the solar cell element, it is possible to contribute to efficient use of resources. Therefore, the concentrating solar cell device is widely used for electric power that is expected to generate power over a vast area of the installation location.

  In this type of solar cell device, the optical system for condensing and the solar cell element for receiving light are combined into one unit, and a plurality of these units are combined to form one module. A desired solar cell device (solar power generation device) is configured by connecting the required number.

The solar power generation device of patent document 1 is comprised from the optical system for condensing the sunlight poured into, and the solar cell element for receiving the sunlight condensed by the optical system.
JP-A-11-284217

  Since this type of solar cell device is normally expected to be used for electric power, the device becomes large. In particular, when a sunlight tracking mechanism is added for the purpose of increasing the utilization efficiency of sunlight, not only the size and weight of the entire apparatus become extremely large, but also the installation location is limited.

  In addition, a condensing lens is required because it has a structure in which sunlight is collected and received by the solar cell element, but this lens must be arranged in an appropriate positional relationship with respect to the solar cell element. For this reason, advanced alignment technology is required.

  Furthermore, for reducing the power load in driving the solar light tracking mechanism, it is desired to reduce the size and weight of the device.

  The present invention has been made in view of such a situation, and the problem is that the frame structure for mounting the solar cell element and the structure of the assembly member of the concentrating optical element are simplified and the alignment is easily performed. An object of the present invention is to provide a concentrating solar cell module and a concentrating solar cell device having a structure that can be used.

According to one aspect of the present invention, sunlight a focusing lens for focusing an overall planar shape is substantially rectangular, having a light receiving surface to receive sunlight, the light receiving surface of at least 3 A condensing lens composed of two surfaces, a rectangular bottom plate arranged at a predetermined distance from the condensing lens, and sunlight collected and collected by the condensing lens mounted and held on the bottom plate and the solar cell element for receiving, are disposed between the condenser lens and the bottom plate to hold the positional relationship between the solar cell elements mounted and held in said bottom plate and said condenser lens to said predetermined distance sidewalls The side wall plate is composed of a vertical side wall plate arranged on the short side of the bottom plate and a horizontal side wall plate arranged on the long side of the bottom plate, and the vertical side wall plate is The contour shape of the upper side is a ring on the short side of the condenser lens. Shape and is configured in a shape corresponding, concentrating solar cell module is provided, characterized in that.

  According to another aspect of the present invention, there is provided a solar cell module according to one aspect of the present invention and a uniaxial rotation mechanism that rotates the solar cell module for tracking sunlight. A solar cell device is provided.

  According to still another aspect of the present invention, a plurality of solar cell modules, a plurality of uniaxial rotation mechanisms that rotate each of these solar cell modules for solar light tracking, and solar power to these uniaxial rotation mechanisms And a power transmission device for transmitting power for rotating the battery modules in an interlocking manner, and each solar cell module is a solar cell module according to one aspect of the present invention. A battery device is provided.

  According to the concentrating solar cell module of the present invention, since the side wall plate that sets and holds the positional relationship between the condensing lens and the solar cell element mounted on the bottom plate is provided, the concentrating lens and the solar cell element Ensuring alignment accuracy is easy. In addition, since the light receiving surface is provided with a condensing lens composed of at least three surfaces, it is possible to set the focal length of the condensing lens to be short, and the strength against the deflection of the light receiving surface is increased. In this case, reliability can be improved. Therefore, by reducing the size and the number of members constituting the solar cell module, the structure can be simplified, and the size and weight can be reduced. As a result, the load of power necessary for driving the solar cell device is reduced, and driving energy can be saved.

  According to the concentrating solar cell device of the present invention, the concentrating solar cell module of the present invention and the uniaxial rotating mechanism for rotating the module for solar light tracking are provided. It is possible to reduce the burden of driving power required for solar tracking. Furthermore, when the solar cell module includes a plurality of solar cell modules, a plurality of uniaxial rotation mechanisms, and a power transmission device that transmits power for rotating the solar cell modules to these uniaxial rotation mechanisms, Compared with the one that individually rotates the solar cell module, further reduction in size and weight can be achieved.

Embodiment 1
Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. Fig.1 (a) shows the disassembled perspective view of the principal part structural member of the concentrating solar cell module which consists of three units in this embodiment. FIG.1 (b) shows the perspective view of the solar cell module.

  As shown in FIG. 1 (a), the three-unit solar cell module 1 in FIG. 1 (b) includes a condenser lens 2, a rectangular bottom plate 3 on which a large number of solar cell elements 6 are mounted and fixed, It is comprised by the side wall plates 4a and 4b which set and hold | maintain the optical positional relationship of the condensing lens 2 and the solar cell element 6 mounted in the baseplate 3, and these structural members are assembled mutually.

  FIGS. 2A and 2B are a perspective view and a cross-sectional view, respectively, of the condenser lens 2 for one unit. The collective lens 2 has a substantially rectangular plane shape as a whole, and a light receiving surface that receives the irradiated sunlight is substantially parallel to the bottom plate 3, and one flat horizontal plane region 2 a and the bottom plate 3. It is comprised by two inclined surface area | regions 2b * 2b inclined. The inclined surface regions 2b and 2b are inclined in a moderately convex manner continuously on both sides of the horizontal surface region 2a. The light receiving surface of the horizontal surface region 2a and the light receiving surfaces of the inclined surface regions 2b and 2b are both smooth surfaces, and rainwater, dew, etc. are smooth from the light receiving surface of the horizontal surface region 2a and the light receiving surfaces of the inclined surface regions 2b and 2b. It has a structure that flows down.

  Since the horizontal plane region 2a is formed of a flat surface, the central portion of the width, which is a portion immediately above the solar cell element 6, may be a transmissive portion where parallel light from the sun is incident without being refracted. Therefore, the horizontal plane region 2a includes a non-light condensing part S in which the groove of the Fresnel lens is not carved in the center of the width. Further, the horizontal plane region 2a includes a condensing portion in which a groove of a Fresnel lens is engraved on the inner surface near the inclined surface regions 2b and 2b, which is a portion excluding the non-condensing portion S.

  The inclined surface regions 2b and 2b are provided with a condensing portion on the inner surface of which grooves of a linear Fresnel lens are engraved. FIG. 2C shows an enlarged view of a boundary portion between the horizontal plane region 2a and the inclined surface regions 2b and 2b. Here, the light receiving surfaces of the inclined surface regions 2b and 2b are configured to be gently convex curved surfaces, but may be flat inclined surfaces.

  In the present embodiment, the condenser lens 2 is formed by integrally molding a Fresnel lens corresponding to the solar cell elements 6 arranged in three rows. Specifically, a product obtained by extruding a resin from an extrusion die port for 3 units and cutting it into a module length is used.

  3 and 4 show the positional relationship among the solar cell element 6 mounted on the bottom plate 3, the condenser lens 2, and the side wall plates 4a and 4b. 3 shows a plan view of the bottom plate 3 and the solar cell element 6 and a side view of the side wall plates 4a and 4b, and FIG. 4A shows one side wall along the line XX of FIG. The cross-sectional schematic diagram of the bottom plate 3 and the condensing lens 2 including the cross section of the plate 4b (lateral side wall plate) is shown, and FIG. 4 (b) shows an enlarged view of the main part of FIG. 4 (a).

  As shown in FIG. 3, the side wall plates 4 a and 4 b for fixing and installing the bottom plate 3 and the condenser lens 2 are the vertical side wall plates 4 a and the bottom plate 3 arranged on the short side which is one edge of the rectangular bottom plate 3. It is comprised by the side wall board 4b arrange | positioned at the long side side which is the other edge part.

  In the present embodiment, the solar cell elements 6 mounted on the bottom plate 3 are arranged in parallel with the long side of the lateral wall plate 4b, and 16 pieces of Si-type solar cell elements 6 each having a size of about 77 mm square are taken as one row. These are arranged in three rows so as to be electrically in series. A power line for taking out the generated electricity is not shown. Here, the outer shape of the bottom plate 3 is about 1050 mm × about 1200 mm, and the height of the side wall plate 4 b is about 80 mm.

  The vertical side wall plate 4a is provided with a screw hole 13 for connecting and fixing the vertical side wall plate 4a and the horizontal side wall plate 4b, and a screw hole 14 for fixing the condenser lens 2. As shown in FIG. 4B, the vertical side wall plate 4 a is configured to be fixed with screws at a screw hole 11 formed on the horizontal side wall plate 4 b and a tap hole 12 formed on the condenser lens 2. .

  FIG. 5A shows a cross-sectional view taken along line AA in FIGS. 1B and 4A, and FIG. 5B shows a cross-sectional view of FIG. 1B and FIG. 4A. A cross-sectional view along the line BB is shown, and FIG. 5E shows a cross-sectional view along the line XX in FIG.

  As shown in these drawings, the bottom plate 3 includes a bottom plate fitting groove as a bottom plate mounting portion provided in the lower portion of the vertical side wall plate 4a and a bottom plate as a bottom plate mounting portion provided in the lower portion of the lateral side wall plate 4b. It is fitted to the fitting groove for positioning and positioned, and is fixed to the vertical side wall plate 4a and the horizontal side wall plate 4b (FIGS. 5A, 5B, and 5E). The condensing lens 2 is fitted in a condensing lens fitting groove as a condensing lens mounting portion provided on the upper side of the lateral side wall plate 4b (FIG. 5E) and at the upper side of the vertical side wall plate 4a. (FIG. 5 (a)), and further, the tap hole 12 is fixed to the vertical side wall plate 4a by the screw 16 at the tap hole 12, and the positioning is performed ( FIG. 5 (b)) is fixed to the vertical side wall plate 4a and the horizontal side wall plate 4b. The vertical side wall plate 4 a and the horizontal side wall plate 4 b are connected and fixed by screws at the screw holes 13 and the screw holes 11.

  Here, the shape of the upper side portion of the vertical side wall plate 4a is preferably a shape corresponding to the shape of one edge portion of the condenser lens 2, and in this embodiment, a frame in which an aluminum alloy or the like is extruded is used. Cut and molded. Further, since the condenser lens 2 is basically fixed to the vertical side wall plate 4a by the condensing lens fitting groove in the horizontal side wall plate 4b and the screw 16 in the tap hole 12, the positioning is completed. 15 may be omitted. Further, it is preferable that a buffer material is wound around the end portion of the condenser lens to protect it from the fitting portion and the contact portion with the vertical side wall plate 4a and the horizontal side wall plate 4b.

  The bottom plate 3 is end-sealed and laminated with a laminated structure made of ethylene vinyl acetate, solar cell elements 6 connected in series, ethylene vinyl acetate and a protective film sheet formed on an aluminum plate. Here, the protective film sheet is preferably made of a weather permeable material, and may be made of a transparent thin film resin such as an acrylic resin, a fluorine resin, or a silicon resin, or may be made of a thin film glass. .

  Thus, although the part of the solar cell element 6 is laminated by the protective film sheet here, one edge part / other edge part of the condenser lens 2 and one edge part / other edge part of the bottom plate 3 are necessary. Accordingly, waterproof treatment sealing may be performed as appropriate.

  In the solar cell module 1 of the present embodiment configured as described above, the sunlight irradiated to the horizontal plane area 2a and the inclined plane areas 2b and 2b of the condenser lens 2 is the two pieces of sunlight shown in FIG. The light is condensed inside the broken line and received by the solar cell element 6. Here, the vertical distance between the horizontal plane region 2a of the condensing lens 2 and the solar cell element 6 is set to about 120 mm, and the condensing lens 2 maintains a predetermined positional relationship with the solar cell element 6 with high accuracy. It is fixed.

[Embodiment 2]
Next, Embodiment 2 of the present invention will be described with reference to the drawings. FIG.1 (c) shows the disassembled perspective view of the principal part structural member of the concentrating solar cell module which consists of three units in this embodiment. FIG.1 (d) shows the perspective view of the solar cell module. FIG.4 (c) shows side surface sectional drawing of FIG.1 (d). FIG. 5C shows a cross-sectional view along the line CC in FIG. 1D, and FIG. 5D shows a cross-sectional view along the line DD in FIG.

  As shown in these drawings, the bottom plate 3 is fitted into a bottom plate fitting groove provided in a lower portion of the vertical side wall plate 4a and a bottom plate fitting groove provided in a lower portion of the horizontal side wall plate 4b and positioned. Are fixed to the vertical side wall plate 4a and the horizontal side wall plate 4b (FIG. 5 (c), FIG. 5 (d), FIG. 5 (e)). The condensing lens 2 is fitted into a condensing lens fitting groove provided in the upper part of the lateral side wall plate 4b (FIG. 5E), and the fin portion 15 provided in the upper part of the vertical side wall plate 4a. Is in contact with the upper surface of the rectangular portion of the vertical side wall plate 4a (FIG. 5D), and the positioning is performed. That is, the condenser lens 2 is fixed in a state sandwiched between the lower surface of the fin portion 15 of the vertical side wall plate 4a and the upper surface of the rectangular portion.

  Here, the shape of the upper side portion of the vertical side wall plate 4a is preferably a shape corresponding to the shape of one edge portion of the condenser lens 2, and in this embodiment, a frame in which an aluminum alloy or the like is extruded is used. Cut and molded. The fin 15 is formed only on the top side of the vertical side wall plate 4a.

  FIG. 6 is a schematic configuration diagram illustrating an example of a concentrating solar cell device using the solar cell module according to Embodiment 1 or Embodiment 2 of the present invention.

  As shown in FIG. 6, this solar cell device is a horizontal one as a part of the solar cell module 1 of the first embodiment or the second embodiment and a uniaxial rotation mechanism that rotates the solar cell module 1 for tracking sunlight. And a rotating shaft 7. The rotating shaft 7 is arranged parallel to the north-south direction and is fixed to the base, and a motor as a part of a uniaxial rotating mechanism so that the solar cell module 1 rotates from east to west for solar light tracking. And so on.

  FIG. 7 shows a plurality of solar cell modules 1, a rotating shaft 7 as a part of a plurality of uniaxial rotating mechanisms that rotate each of these solar cell modules 1 for solar light tracking, and these rotating shafts. 7 is a perspective view showing a main part of a solar cell device including power transmission devices 8, 9, and 10 for transmitting power for rotating the solar cell module 1 to 7.

  As shown in FIG. 7, this solar cell device is connected to a power transmission rod 9 having a plurality of screw teeth 10 in which a plurality of gears 8 attached to the respective rotating shafts 7 mesh with these gears 8. Thus, each solar cell module 1 can be rotated in a synchronized manner. In addition, in order to rotationally drive the plurality of solar cell modules 1, it is important to make the solar cell modules 1 lighter.

[Embodiment 3]
Next, Embodiment 3 of the present invention will be described with reference to the drawings. Fig.8 (a) shows the perspective view of the solar cell module 1 by which the Fresnel lens corresponding to the solar cell element 6 arranged in the even number row | line | column (for example, 4 rows) was integrally molded. This solar cell module 1 has a structure in which a rotating shaft 7 is inserted through a module body.

  In such a structure, since the center of the rotating shaft 7 and the center of gravity of the solar cell module 1 coincide with each other, it is possible to reduce the burden on the rotation drive unit when the solar cell module 1 rotates.

  FIG.8 (b) shows principal part sectional drawing of the rotating shaft penetration part in the solar cell module 1 shown by Fig.8 (a). The sunlight irradiated to the condensing lens 2 of the solar cell module 1 is condensed inside the two broken lines related to each solar cell element 6 and received by each solar cell element 6. Therefore, the rotating shaft 7 can be arrange | positioned in the position which does not block the condensed sunlight by arranging the solar cell element 6 in an even number row.

  FIG. 9A and FIG. 9B are main part configuration diagrams showing another example of the concentrating solar cell device using the solar cell module 1 of the first embodiment or the second embodiment.

  As shown in FIG. 9A and FIG. 9B, in this solar cell device, a cam 17 attached to the shaft of the motor 20 and a cam 18 attached to the inclined rotary shaft 7 of the solar cell module 1 Are connected by the connecting rod 19, and the rotational motion of the motor 20 is converted into the amplitude motion (oscillating rotational motion) of the rotating shaft 7 and transmitted to the solar cell module 1.

  FIG. 10 is a main part configuration diagram showing still another example of the concentrating solar cell device using the solar cell module 1 of the first embodiment or the second embodiment.

  As shown in FIG. 10, a cam 18 attached to the rotating shaft 7 of one solar module 1 to which the power of the motor 20 is transmitted and a similar cam 18 in the adjacent solar module 1 are part of the power transmission device. The wires 21 are connected.

  According to the concentrating solar cell module 1 of Embodiments 1 to 3 as described above, the side wall plates 4a and so on for setting and maintaining the positional relationship between the condensing lens 2 and the solar cell element 6 mounted on the bottom plate 3 are set. Since 4b is provided, it becomes easy to ensure the alignment accuracy between the condenser lens 2 and the solar cell element 6. In addition, since the light receiving surface includes the condensing lens 2 composed of at least three surfaces, the focal length of the condensing lens 2 can be set short, and the strength against the deflection of the light receiving surface is increased. , Reliability during assembly can be improved. Therefore, by reducing the size and the number of members constituting the solar cell module, the structure can be simplified, and the size and weight can be reduced.

FIG. 1A is an exploded perspective view of main components of the solar cell module according to Embodiment 1. FIG. FIG. 1B is a perspective view of the solar cell module. FIG. 1C is an exploded perspective view of main components of the solar cell module according to Embodiment 2. FIG. 1D is a perspective view of the solar cell module. FIG. 2A is a perspective view of a condensing lens of the solar cell module according to Embodiment 1. FIG. FIG. 2B is a cross-sectional view of the condenser lens. FIG. 2C is a partially enlarged view of the condenser lens. FIG. 3 is a plan view of a bottom plate and a solar cell element of the solar cell module according to Embodiment 1 and a side view of a side wall plate. Fig.4 (a) is sectional drawing of the solar cell module along the XX line of FIG. FIG.4 (b) is the principal part enlarged view of the solar cell module. FIG.4 (c) is side sectional drawing of the solar cell module of FIG.1 (d). Fig.5 (a) is sectional drawing along the AA of FIG.1 (b). FIG.5 (b) is sectional drawing along the BB line of FIG.1 (b). FIG.5 (c) is sectional drawing along CC line of FIG.1 (d). FIG.5 (d) is sectional drawing along the DD line | wire of FIG.1 (d). FIG. 5E is a cross-sectional view taken along line XX in FIG. FIG. 6 is a schematic configuration diagram of a solar cell device using the solar cell module according to Embodiment 1 or Embodiment 2. FIG. 7 is a principal perspective view showing a solar cell device including a plurality of solar cell modules. FIG. 8A is a perspective view of the solar cell module according to Embodiment 3. FIG. FIG. 8B is a cross-sectional view of the main part of the solar cell module 1. FIG. 9A and FIG. 9B are main part configuration diagrams showing another example of the concentrating solar cell device using the solar cell module of the first embodiment or the second embodiment. FIG. 10 is a main part configuration diagram showing still another example of a concentrating solar cell device using the solar cell module of Embodiment 1 or Embodiment 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Condensing lens 3 Bottom plate 4a Side wall plate 4b Side wall plate 6 Solar cell element 7 Rotating shaft 8 Gear 9 Power transmission part 10 Screw tooth 11 Screw hole 12 Tap hole 13 Screw hole 14 Screw hole 15 Presser 16 Screw 17 Cam 18 Cam 19 Connecting rod 20 Motor 21 Power transmission part

Claims (7)

A condensing lens that condenses sunlight, the overall planar shape is substantially rectangular, has a light-receiving surface that receives sunlight, and the light-receiving surface is composed of at least three surfaces When,
A rectangular bottom plate disposed at a predetermined distance from the condenser lens and having a long side and a short side that are parallel to the long side and the short side of the condenser lens, and
A solar cell element that is mounted and held on the bottom plate and receives sunlight collected by the condenser lens; and
A side wall plate disposed between the condensing lens and the bottom plate, and holding a positional relationship between the condensing lens and the solar cell element at the predetermined distance;
When the bottom plate is disposed horizontally, one of the three surfaces of the condenser lens is arranged in parallel with the bottom plate and is parallel to the long side of the condenser lens. A rectangular horizontal surface region having two long sides, and the remaining two are respectively connected to the long sides of the horizontal surface region, and from a rectangular inclined surface region that is inclined downward from each long side toward the bottom plate Become
The side wall plate is composed of a vertical side wall plate arranged on the short side of the bottom plate and a horizontal side wall plate arranged on the long side of the bottom plate,
The vertical side wall plate is configured such that the contour shape of the upper side portion thereof corresponds to the contour shape of the short side portion in the horizontal plane region and the short side portion in the inclined surface region of the condenser lens. Concentrating solar cell module. A part of the horizontal plane region of the condenser lens is a transmission part that transmits sunlight without condensing,
The condensing lens is fitted in a condensing lens fitting groove provided in the horizontal side wall plate, and a fin portion provided in a part of the vertical side wall plate and a rectangular portion provided in another portion, Is fixed to the vertical side wall plate and the horizontal side wall plate,
The bottom plate is fixed to the vertical side wall plate and the horizontal side wall plate by being fitted into bottom plate fitting grooves respectively provided in the vertical side wall plate and the horizontal side wall plate. The concentrating solar cell module according to claim 1. The horizontal surface area of the condensing lens, concentrating solar cell module according to claim 2 in which portions other than the transmitting unit is characterized in that it is constituted by a Fresnel lens. The concentrating solar cell module according to claim 3, wherein the inclined surface region of the condensing lens is configured by a Fresnel lens. The concentrating solar cell module according to claim 4, wherein the Fresnel lens is a linear Fresnel lens.   A concentrating solar cell device comprising: the solar cell module according to any one of claims 1 to 5; and a uniaxial rotation mechanism that rotates the solar cell module for tracking sunlight. . A plurality of solar cell modules, a plurality of uniaxial rotation mechanism for rotating for solar tracking each of these solar cell modules, for rotating the solar cell module in conjunction shape to these uniaxial rotation mechanism A concentrating solar cell device comprising: a power transmission device that transmits power, wherein each of the solar cell modules is the solar cell module according to any one of claims 1 to 5.