JPH0593055U - Solar power generator - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a solar cell module having a structure capable of efficiently performing photoelectric conversion of sunlight. [Structure] Solar cell modules 1A to 1C in which solar cells 3 are arranged on a substrate 2 are vertically stacked with a plurality of stages. An anti-slope 6 that guides light to the solar cells 3 of the modules 1B and 1C adjacent to the lower side between the solar cell modules 1A to 1C.
A light guide made of a, 6b or a diffraction grating is provided to improve efficiency. In addition, a configuration in which one or more stages of modules in which solar cells are vertically provided is provided on the lower surface of the solar cell module in which the solar cells 3 are arranged on the substrate 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a power generator using a solar battery installed on the roof of a building or a car or outdoors.

[0002]

[Prior Art]

 FIG. 5 is a vertical cross-sectional view showing an example of a conventional solar cell module 1. In the conventional one, solar cells 3 are arranged in a plane on a surface of a substrate 2 which is usually an aluminum plate.

[0003]

[Problems to be solved by the device]

 However, according to the configuration of this conventional solar cell module, as shown by the solid line 7, only the light directed to the solar cell 3 on the surface of the substrate 2 contributes to the power generation, and as shown by the dotted line 7a, the vicinity of the solar cell 3 is shown. The light radiated on the surface does not contribute to power generation.

In view of the above situation, it is an object of the present invention to provide a solar cell module having a configuration capable of efficiently photoelectrically converting light.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention stacks solar cell modules in which solar cells are arranged on a substrate with a plurality of vertical intervals, and between solar cell modules The solar cell is provided with a light guide including a reflecting surface or a diffraction grating that guides light. In addition, the present invention provides one or more stages of vertically arranged solar cells on the lower surface of a solar cell module in which solar cells are arranged on a substrate, and guides light to the solar cells of the module on the lower surface. An optical guide consisting of a reflecting surface and a diffraction grating is provided.

[0006]

[Advantageous Effects] Since the present invention has the above configuration, light is guided to the solar cell of the lower module by the light guide, and the entire multi-stage module contributes to power generation.

[0007]

【Example】

 FIG. 1 (A) is a longitudinal sectional view showing an embodiment of a solar cell power generator according to the present invention, and FIG. 1 (B) is a plan view thereof. 1A to 1C are vertically stacked solar cell modules (three in this example), and each module 1A to 1C has solar cells 3 arranged on the surface of a substrate 2 made of a rectangular aluminum plate. It is a thing. Reference numeral 4 denotes a transparent plastic spacer interposed between the modules 1A and 1B, 1B and 1C at each stage, and the spacer 4 has a lower surface on which an adhesive 5 made of a transparent material is attached to the surface of the solar cell 2. The upper modules 1A and 1B are fitted in the rectangular recesses 4b on the upper surface of each spacer 4 so that the modules are combined with each other.

Around each spacer 4, there is an extending portion 4a extending outwardly from the substrate 2. The lower surface of the extending portion 4a has an inclined surface (the inclined surface is an arcuate inclined surface that is convex downward). May be formed), and an aluminum film or the like is deposited on the inclined surface by vapor deposition or the like to form the inclined reflecting surface 6a. Also, a similar reflecting surface 6b is formed on the upper surface of the spacer 4 facing the lower surface of the module.

According to this configuration, the light 7 traveling toward the peripheral portions of the modules 1A to 1C reaches the solar cells 3 of the lower modules 1B and 1C after passing through the reflecting surfaces 6a and 6b (obliquely). Since the radiated light and the reflected light 7a from the atmosphere directly reach the solar cells 3 of the lower modules 1B and 1C), the lower modules 1B and 1C also generate power, and a device with a large amount of power generation is realized. ..

In the above embodiment, the lower surface of the extending portion 4a may be formed as a flat surface, but by forming it as an inclined surface, the amount of light traveling toward the reflecting surface 6b on the upper surface of the spacer 4 is increased and the efficiency is improved. Can be raised. Further, as shown in FIG. 2 (A), the reflecting surface 6c formed on the upper surface of the spacer 4 is formed on the uneven surface that diffusely reflects the incident light, so that the reflected light 7 is reflected on the lower solar cell 3. It is possible to make the solar cells more evenly contribute to power generation by being uniformly irradiated.

In addition, as shown in FIG. 2B, the reflecting surface 6 d formed on the lower surface of the extending portion 4 a of the spacer 4 is formed on an uneven surface forming a diffraction grating and is formed on the upper surface of the spacer 4. The efficiency can be further improved by increasing the ratio toward the projection surface 6e, and the efficiency can be improved by forming the reflecting surface 6e on the upper surface of the spacer 4 on the uneven surface forming this diffraction grating. .. Furthermore, by forming a reflecting surface 6x on the side surface of the upper module 1A, 1B or the inner surface of the recess 4b, the light 7a incident from the side is reflected by the reflecting surface 6x, and then the reflecting surfaces 6d, 6e. Since it reaches the solar cells 3 of the lower modules 1B and 1C after the passage of time, the efficiency can be further improved.

In the above embodiment, the example in which the spacer 4 made of a transparent material is provided between the modules 1A to 1C so as to cover the entire surface of the lower module, is shown in the vertical sectional view of FIG. As shown in the plan view of), the space 9 may be formed between the modules 1A to 1C by stacking them via the spacer 8 interposed in a part between the modules 1A to 1C.

FIG. 4A is a vertical sectional view showing another embodiment of the present invention, and FIG. 4B is a plan view thereof. In this embodiment, a module 1D in which the solar cells 3 are vertically arranged on a vertically oriented substrate 2A is provided on the lower surface of the solar cell module 1A in which the solar cells 3 are arranged on the substrate 2, and the module 1D on the lower surface is provided. As a light guide for guiding light to the solar cell, the upper and lower reflection surfaces 6f and 6g are provided in parallel between the vertically adjacent modules, and extend outside the periphery of the lower reflection surface 6g of the reflection surfaces. The reflecting surface 6h formed on the exposed portion is provided. The device of this embodiment is suitable for use as a power generation device that can take a vertically long installation space.

[0014]

[Effect of the device]

 According to the first aspect, since power is generated by the multi-stage solar cell module, efficient power generation can be performed in a narrow space.

According to the second aspect, the light can be effectively guided to the solar cell of the lower module by the reflection on the reflecting surface.

According to the third aspect, in addition to the effect of the second aspect, it is possible to form the spacer having high strength in the multi-stage module configuration.

According to the fourth aspect, since the lower module can have the vertically long configuration in which the light from the side surface can be effectively used, it is possible to realize a module suitable for application when the vertically long installation space is allowed. ..

According to the fifth aspect, it is possible to realize a device capable of effectively generating power by a vertically arranged solar cell.

According to the sixth aspect, it is possible to effectively use the light in the lower module by controlling the direction of the light by the diffraction element.

[Brief description of drawings]

FIG. 1A is a vertical sectional view showing an embodiment of a solar cell power generation device according to the present invention, and FIG. 1B is a plan view thereof.

2A and 2B are partially enlarged vertical sectional views showing modifications of the embodiment of FIG.

FIG. 3A is a longitudinal sectional view showing another embodiment of the present invention,
(B) is the top view.

FIG. 4A is a vertical sectional view showing another embodiment of the present invention,
(B) is the top view.

FIG. 5 is a vertical cross-sectional view showing a conventional solar cell module.

[Explanation of symbols]

 1A-1D Module 2 Substrate 3 Solar cell 4 Spacer 4a Extension part 6a, 6b, 6h, 6x Reflection surface 6c Diffuse reflection surface 6d, 6e Reflection surface 6f, 6g Parallel reflection surface 7 Light 8 Spacer 9 Space

Claims (6)

[Scope of utility model registration request] 1. A solar cell module, in which solar cells are arranged on a substrate, is vertically stacked with a plurality of stages, and light is introduced between the solar cell modules to guide the solar cells of the module adjacent to the lower side. A power generator using a solar cell, which is provided with a guide. 2. The light guide according to claim 1, wherein the light guide comprises an inclined reflecting surface formed on an extending portion of the corresponding step to a side surface and a reflecting surface provided on a lower surface of the module adjacent to the upper side. A power generator using a solar cell. 3. The spacer according to claim 1, wherein the light guide includes a spacer made of a transparent material interposed between vertically adjacent modules, and an inclined reflecting surface formed on an extending portion of the spacer to a side surface. And a reflective surface provided on the upper surface of the spacer or the lower surface of the module adjacent to the upper side of the spacer. 4. A module in which solar cells are vertically provided on a lower surface of a solar cell module in which solar cells are arranged on a substrate.
A power generation device using a solar cell, characterized in that a light guide for guiding light to the solar cell of the module on the lower surface is provided in addition to the steps. 5. The light guide according to claim 4, wherein the light guide extends outside the periphery of the upper and lower reflective surfaces provided in parallel between the vertically adjacent modules and the lower reflective surface of the reflective surfaces. A power generation device using a solar cell, comprising a slanted reflection surface formed on the exposed portion. 6. A power generator using a solar cell according to claim 1, wherein the light guide is a diffraction grating.