JP2006278536A - Installation structure of solar cell element - Google Patents

Abstract

To provide a solar cell element installation structure capable of changing the installation angle of a solar cell element by simple means.
A base, a solar cell element installed on the base, and the base and the solar cell element are disposed between the base and the solar cell element, and the length of the base is changed by heat. An installation structure of a solar cell element, comprising: an installation angle varying unit that varies an installation angle of the solar cell element.
[Selection] Figure 5

Description

  The present invention relates to a solar cell module that generates power by using solar energy, a solar cell module capable of automatically adjusting the inclination angle of a solar cell element in accordance with a light source, and improving power generation efficiency, and solar power generation It relates to the structure of the device.

  In recent years, with increasing interest in global environmental problems, new energy technology using natural energy has attracted attention. As one of them, there is a high interest in solar power generation systems using solar energy, and a large number of solar cell elements that convert sunlight into electric energy are arranged into a solar cell module. Further, the solar cell module is used for a roof of a house or a factory. Many of them are installed on the roof to cover the power of indoor electric loads, and surplus power is sold to power companies. In such a photovoltaic power generation system, it is common to place a solar cell module that converts sunlight into electricity on an installation table made by combining iron or aluminum rails called a frame, The solar cell module is inclined with an inclination angle to the gantry to improve the power generation efficiency. A state in which this solar cell module is mounted on a gantry is referred to as a solar power generation device.

  Hereinafter, the structure of the solar cell module manufactured by the laminate type manufacturing method will be described as an example. As shown in FIG. 14, the solar cell module 20 is provided with a light transmission plate 24 such as glass or resin on the light receiving surface, and a large number of solar cell elements 23 are formed on the light transmission plate 24 with EVA resin (Ethylene-Vinyl Acetate). A non-light-receiving surface, which is the back surface, is laminated with a weathering film 26 such as a Teflon (registered trademark) film, PVF (polyvinyl fluoride), or PET (polyethylene terephthalate). As the solar cell element 23, for example, a single crystal, polycrystal or amorphous material such as a compound semiconductor made of silicon-based semiconductor or gallium arsenide is used, and is electrically connected in series and / or in parallel with each other. Connected to the back surface of the solar cell module 20, that is, on the weather-resistant film 29, there is a resin such as ABS resin. Bonding the junction box 19 which is configured by a resin or aluminum metal, the output is taken out by the transmission line connected to the terminal for taking out the output power of the solar cell module 20. The light transmitting plate 24, the solar cell element 23 and the weather resistant film 29 are attached to a rectangular main body with a frame 21 made of aluminum metal, SUS, or the like around each side, The solar cell module 20 is configured to serve as a fixing portion for installation. Moreover, it is useful also for the purpose of the strength improvement which protects the edge part of the solar cell module 20, and raises the whole intensity | strength. The frame is made of a metal bending material such as iron, stainless steel, or aluminum, or a resin molded product such as FRP (Fiber Reinforced Plastic). The assembly of the frames is directly coupled with screws or rivets. It is performed by being fixed through an auxiliary member such as a connecting plate or a connecting plate, or by being bonded to a light transmission plate 24 such as glass or resin. Moreover, it is good also as a structure which inserts the light transmissive board 24 in the frame integrally molded.

  Loads such as lighting and electric motors are operated using the generated power of the solar cell module thus produced. At this time, as shown in FIG. 15, the solar cell module 20 is placed on and fixed to an installation base 18 that is a combination of rails such as iron and aluminum, which is called a base, to form a solar power generation apparatus. The base of the pedestal is firmly fixed to the roof 17 or rooftop concrete with nails, anchor bolts, etc. so that it will not be blown or fallen by wind loads such as wind. Cannot be changed. In addition, when the solar cell module 20 is installed vertically on the wall surface of the building, or the weather-resistant film 29 of the solar cell module 20 is translucent and the solar cell module is installed in a window or the like as a building material for lighting. It is the same that the angle of inclination cannot be easily changed.

  Therefore, in order to improve it, a method has been devised in which the inclination angle of the solar cell module on the gantry can be changed relatively easily to improve the power generation efficiency (see, for example, Patent Document 1).

Moreover, the window structure which can adjust a module angle manually is devised (for example, refer patent document 2).

In addition, the solar cell module is composed of a plurality of layers, an air layer is provided in the intermediate layer so that the reflector can be rotated, and sunlight is reflected to improve the power generation efficiency of the solar cell regardless of the angle of the sun. Such a method has also been devised (see, for example, Patent Document 3).
JP 2003-282918 A JP 2002-168062 A JP 2002-158367 A

  However, in actual use conditions, the angle of the sun, which is the light source, changes throughout the year and year, and ordinary solar power generators have a solar cell with a tilt angle and orientation that maximizes the total annual power generation. The installation method is generally considered so that the power generation amount can be obtained as a total by fixing the module. In the method of fixing the solar cell module as described above, the optimum angle is obtained for most of the year. The power is generated at an angle shifted from the angle, and a loss occurs in the power generation efficiency except for the time of the optimum light receiving angle.

  In order to improve it, measures such as adjusting the angle of the solar cell module manually, monitoring the amount of power generation, and changing the angle of the module with a motor, etc. have been devised. In many cases, manually changing the angles of all modules is a difficult task and impractical. In the latter case, the amount of power generated by the solar cell is increased as a result of the large-scale installation, which increases maintenance and maintenance efforts, and requires power for devices such as motors that change the angle of the module. Will be reduced.

  In addition, the optimum installation orientation in Japan is usually south, and the optimum installation angle is 30 ° to 45 °. However, solar cell modules installed on the roof of a house have the appearance of a house. Since it depends on the installation direction and inclination angle of the roof so as not to be damaged, it is difficult to prioritize the power generation with the inclination angle and direction. The same applies to the case where it is installed on the wall or window of a building.

  In addition, by providing a reflector inside the solar cell module and changing the irradiation angle according to the solar altitude, power generation is possible regardless of the installation angle on the gantry. Therefore, the thickness of the solar cell module is increased, and there is a problem that the apparatus becomes a large-scale device due to an increase in the size of a frame for holding the solar cell module.

  Then, an object of this invention is to provide the installation structure of the solar cell element which can vary the installation angle of a solar cell element with a simple means.

  The installation structure of the solar cell element of the present invention is arranged between a base, a solar cell element installed on the base, the base and the solar cell element, and the length is changed by heat. And an installation angle varying means for varying the installation angle of the solar cell element with respect to the base.

  Moreover, the solar cell element of the present invention has the above-described installation structure, wherein the installation angle variable means has an expansion / contraction part whose length is expanded and contracted by heat, and a heat collection part that collects heat transmitted to the expansion / contraction part. It is characterized by that.

  Furthermore, the solar cell element installation structure of the present invention is characterized in that, in the installation structure, the stretchable part has a configuration in which a plurality of shape memory alloys having different deformation temperatures are connected in series.

  Furthermore, the solar cell element installation structure of the present invention is characterized in that, in the above installation structure, a plurality of the stretchable parts are arranged along one side of the solar power generation element.

  Furthermore, the solar cell element installation structure of the present invention is characterized in that, in the above installation structure, a plurality of the stretchable parts are arranged along two opposing sides of the solar power generation element.

  Moreover, the installation structure of the solar cell element of the present invention is characterized in that, in the installation structure, the installation angle is variable so that the angle between the incident angle of sunlight and the light receiving surface of the solar cell element approaches 90 degrees. And

  According to the present invention, a base, a solar cell element installed on the base, and the base is disposed between the base and the solar cell element, and the length is changed by heat. The installation angle variable means for varying the installation angle of the solar cell element with respect to the above, so that the installation angle of the solar cell element can be varied without using a large-scale facility and without using a manpower. In addition, it is possible to realize a solar cell element or a solar cell module having a structure for improving power generation efficiency.

  The installation angle varying means has a stretchable portion whose length is expanded and contracted by heat, and a heat collecting portion that collects heat transmitted to the stretchable portion, and the stretchable portion has a plurality of different deformation temperatures. Therefore, the installation angle can be changed in multiple stages, and the angle of the solar cell element can be varied more finely.

  Moreover, since the installation angle can be varied in two or four directions by arranging the expansion / contraction part on one side or two opposite sides of the solar cell element, the angle range that can follow the sun is increased and the amount of generated power is further increased. I can do it.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings schematically illustrated.

As shown in FIG. 1, the angle variable structure of the solar cell element according to the present invention includes a solar cell element 10 that generates power, and an expansion / contraction for holding the solar cell element 10 and changing the angle of the solar cell element 10. The angle changer 2 that supports the solar cell element 10 together with the angle changer 2, the bendable rotation unit 3 that absorbs the angle change of the solar cell element 10 due to the expansion and contraction of the angle changer 2, and the angle change The power generation unit 1 is configured by a base 4 to which the unit 2 and the rotation unit 3 are fixed, and a plurality of the power generation units 1 are arranged on the base 4 to form a solar cell module. Each member will be described in detail below.

  The solar cell element 10 is a photoelectric element that generates electric power by solar radiation, and is composed of a semiconductor mainly composed of silicon and a wiring material. In general, the amount of power generated by the solar cell element increases or decreases depending on the amount of incident sunlight. Therefore, in order to increase the amount of generated power, it is desirable to face the sun more and increase the amount of incident light per unit area.

  The rotating part 3 is formed by bending a resin sheet such as PET, and has a role of holding the solar cell element 10 by connecting the solar cell element 10 and the base 4, and by the flexibility of the PET resin, Even when the angle of the battery element 10 varies, the solar battery element 10 is held. Moreover, the rotation part 3 has a role which insulates the solar cell element 10 and the base 4 with the insulation of a resin sheet.

  The base 4 is made of a plate material such as metal, ceramics, resin, or wood, and the angle varying portion 2 and the rotating portion 3 are fixed. Although not shown, the base 4 is provided with a fixing mechanism and device such as a screw hole for fixing to the installation place.

  As shown in FIG. 2, the angle changing unit 2 is constituted by a heat collecting plate 25 and a shape memory alloy 26. The shape memory alloy 26 is formed of a shape memory alloy such as a Ni—Ti type or Ni—Ti—Cu type, and is set to expand in a normal state and to contract at a shape recovery temperature or higher. The shape memory alloy 26 is installed between the solar cell element 10 and the base 4. In addition, this time, the shape memory alloy is described as starting the deformation operation at a temperature above or below a certain temperature, but the same function can be realized if it is a member that sequentially expands and contracts as the temperature changes.

  The heat collecting plate 25 is made of a material having good thermal conductivity such as copper and has an L-shape. The heat collecting plate 25 is connected to the shape memory alloy 26, and has a structure in which the amount of heat collected by the heat collecting plate 25 is transmitted to the shape memory alloy 26.

  Next, the operation of the variable angle structure of the solar cell element according to the present invention will be described.

  As shown to Fig.3 (a), the temperature variable structure of a solar cell element is the state where the temperature of the shape memory alloy 26 is below a shape recovery temperature in the initial state, and the shape memory alloy 26 expanded. At that time, the solar cell element 10 is in a state where the inclination angle is large. However, after the solar cell element 10 is installed and fixed at the installation location and sunlight is incident on the solar cell element 10 and power generation is started, the heat collecting plate 25 also Since sunlight is irradiated, the temperature of the heat collecting plate 25 is raised. The amount of heat is transferred to the shape memory alloy 26, and when the temperature of the shape memory alloy 26 rises above the shape recovery temperature, the shape memory alloy 26 contracts. Thereby, as shown in FIG.3 (b), the inclination-angle of the solar cell element 10 becomes small. Usually, in summer when the solar altitude is high, the ambient temperature is high and the solar radiation is strong, so the amount of heat collected on the heat collecting plate 25 is large. Conversely, in winter when the solar altitude is low, the temperature is low and the solar radiation is weak, so the amount of heat collected by the heat collecting plate 25 is small. That is, there is a difference in the amount of heat transferred to the shape memory alloy 26 between summer and winter, and the difference between the temperatures of the shape memory alloy 26 is utilized. Is set to the shape recovery temperature of the shape memory alloy 26, and the shrinkage amount of the shape memory alloy 26 is adjusted to the sun angle difference between summer and winter, thereby reducing the inclination angle of the solar cell element 10 in summer. The solar cell element 10 can be made to face the high solar altitude in summer, and the inclination angle of the solar cell element 10 can be increased in winter to ensure an angle directly facing the winter solar altitude. With such a structure, when the solar cell is installed, the angle of the solar cell element 10 is automatically adjusted according to the solar altitude without performing special power or complicated control device or manual adjustment, The amount of power generated can be increased by increasing the amount of light incident on the solar cell element 10.

  In general, the shape recovery temperature of the shape memory alloy can be arbitrarily set in a relatively wide range of 0 ° C. to 70 ° C. for Ni—Ti type memory alloys and 50 ° C. to 80 ° C. for Ni—Ti—Cu type. Can be set. Further, since the solar power generation element 10 itself generates heat due to loss or the like during power generation, the amount of heat of the solar power generation element 10 itself is transmitted to the shape memory alloy 26 and may affect deformation. Therefore, in order to prevent the solar power generation element 10 and the shape memory alloy 26 from being thermally connected, a heat insulating material 27 as shown in FIG. 6 is inserted between the two, and the shape memory alloy 26 on the solar cell element 10 side is inserted. It is preferable that the influence of heat does not occur so that the inclination angle does not differ between power generation and non-power generation.

  FIG. 4 shows a solar cell module in which a plurality of power generation units 1 having a variable angle structure of the solar cell element having the above structure are arranged in a grid pattern. In this way, the solar cell module angle is fixed for the solar cell modules such as roofing, wall surface installation, and gantry installation that have been fixed in direction by the gantry at the time of installation. Can be adjusted automatically according to the solar altitude, and the power generation amount of the solar cell element can be increased.

  In addition, in the configuration of FIG. 1 described above, the angle adjustment by the deformation of the shape memory alloy 26 can be performed only once, but as shown in FIG. 5, the shape memory alloy changed to a position parallel to the shape memory alloy 26. If an elastic body 28 (which uses a coil spring as an example in this example, but is also a shape memory alloy having a reverse expansion / contraction characteristic) that generates a reaction force to restore the original shape is inserted, the shape memory alloy It is possible to return the deformation of 26 to the original so that the reaction according to the situation can be performed. Specifically, the shape memory alloy has a difference in the generated force above the shape recovery temperature and the generated force below the shape recovery temperature due to the nature, “the generated force above the shape recovery temperature> the shape recovery temperature is below "Generating power" relationship. At this time, when the force of the reaction force generating spring of the elastic body 28 is made intermediate between the two, the shape recovery temperature is reached, and after shrinking, the temperature of the shape memory alloy 26 decreases and becomes lower than the shape recovery temperature. The reaction force of the elastic body 28 exceeds the generation force of the shape memory alloy 26, and the solar cell element 10 can be returned to the initial angle. Further, when the shape memory alloy 26 again exceeds the shape recovery temperature, the generated force of the shape memory alloy 26 exceeds the reaction force of the elastic body 28 and contracts again, thereby deforming the angle of the solar cell element. These deformations become a cycle and can be repeated many times.

  Therefore, according to the configuration using the reaction force generating elastic body 28 as described above, when the solar altitude in winter is low, the inclination angle of the solar cell element is increased, and in the summer when the solar altitude is high, the solar cell element. The inclination angle of the solar cell element can be automatically changed in both directions so as to reduce the inclination angle. Thereby, the inclination angle of the solar cell element can be adjusted in accordance with the solar altitude with respect to the annual solar altitude change, and as a result, the power generation amount can be increased. Furthermore, shape memory alloy has advantages such as no need for maintenance and special power, such as the man-hours for angle adjustment and the power of motors etc., which were necessary to obtain the same effect in the past, A complicated control device is not required, and the number of parts, weight, and man-hours can be greatly reduced compared to them.

  In addition, the solar cell element is generally about 300 μm thick, is vulnerable to impact, and is easily damaged. Therefore, in the example of FIG. 5, the frame 11 that supports the solar cell element is disposed below the solar cell element 10, and the shape memory alloy 26 and the reaction force elastic body 28 are connected to the frame 11 to connect the solar cell element 10 itself. Prevents stress from being applied to the solar cell element and improves the reliability and life of the module.

  Further, in the same figure, a support column 41 having a hinge portion 41 a is placed between the frame 11 and the base 4 in order to arrange the base 4 vertically to form a wall-mounted module. The hinge part 41a has the same function as the bent part 3 of FIG.

  6 is an enlarged view of the heat collecting plate portion of FIG. 5 described above. In this configuration, one side of the heat collecting plate 25 is connected to the shape memory alloy 26 in the same manner as the configuration of FIG. 1 described above. However, the other is fixed to the frame 11 via a heat insulating material 27. The heat insulating material 27 is disposed so as not to dissipate the amount of heat of the heat collecting plate 25 to the frame 11, or conversely absorb the amount of heat from the frame 11, thereby causing the deformation of the shape memory alloy 26. That is, the heat collected on the heat collecting plate 25 is transmitted to the shape memory alloy 26, and the temperature of the shape memory alloy 26 is increased to a shape recovery temperature or higher by the amount of heat, thereby deforming the shape memory alloy 26 and The inclination angle is varied.

  In addition, this structure can be similarly operated even when the base 4 is installed horizontally as shown in FIG. 1 or when it is installed on an inclined roof.

  FIG. 7 shows an example in the case of being configured as a wall surface installation module. The solar cell module includes a first-layer surface light-transmitting portion 42, a second-layer air layer 43, a third-layer power generation unit 1, and a fourth-layer 4 base 4. The first-layer surface translucent portion 42 is made of a tempered glass material having a high transmittance in order to allow light to enter the solar cell element and for indoor lighting. The air layer 43 of the second layer is a space for the cell that changes in angle, and also acts as a heat insulating layer that keeps the indoor temperature. The base 4 of the fourth layer is made of a plate material such as metal, resin, wood, etc., and holds each part of the first to third layers and also has a structure for attaching to the wall surface. Moreover, it is good also as a daylighting module installed in a window etc. by making the base 4 into a transparent tempered glass or a transparent resin board, In this case, the inclination angle of a solar cell element changes according to the incident angle of sunlight. By doing so, it is also possible to obtain the effect of an automatic blind that can keep the amount of sunlight passing through due to seasonal changes constant.

  Moreover, as shown in FIG. 8, the structure of the heat collecting plate 25 can also be changed. In this example, the heat collecting plate 25 has an L shape, but the upper portion of the heat collecting plate 25 is covered with a flange 11 a that is a part of the frame 11. Moreover, in order to improve heat absorption performance on the side surface of the heat collecting plate 25, a heat absorbing paint is applied, and by collecting sunlight, heat is collected and the temperature of the heat collecting plate 25 is increased. Heat-absorbing paints are well known in which fine particles such as copper oxide, manganese dioxide, cobalt oxide, chromium oxide, iron oxide, lead sulfide, and nickel sulfide having semiconductor properties are mixed with binders such as acrylic, silicon, and urethane. However, the type is not limited as long as it has the same effect. By applying this heat-absorbing paint, it is possible to efficiently absorb the heat of sunlight even on cold winter days, and to raise the heat collecting plate to a temperature higher than the highest summer temperature. As shown in FIG. 8 (a), the ridge 11 a protrudes to the extended line of the side surface of the heat collecting plate 25, and the solar cell element 10 has the maximum solar radiation if the sunlight is orthogonal to the solar cell element 10. Although incident, at this time, sunlight is not irradiated to the side surface of the heat collecting plate 25. Therefore, the temperature of the heat collecting plate 25 does not rise, and no angular deformation is performed. Next, when the solar altitude changes and the state shown in FIG. 8B is reached, the side surface of the heat collecting plate 25 is also irradiated with sunlight. Then, the temperature of the heat collecting plate 25 rises and heat is transmitted to the shape memory alloy, the shape memory alloy is deformed, and the angle of the solar cell element 10 is changed as shown in FIG. It can be directed at an angle close to the sunlight. In this way, by limiting the heat collecting part of the heat collecting plate to the side surface, the angle of the sun can be grasped more accurately, and the following performance to the sun at the time of shape deformation can be improved. . Also, in the temperature judgment that includes the temperature as a parameter, the relationship between the temperature and the solar altitude may deviate on cold summer days or warm winter days, but this structure is used to set the judgment temperature higher than the maximum summer temperature. Then, it becomes possible to make the inclination angle of the solar cell element more accurately face the sun on a cold day in summer or a warm day in winter.

  Further, in the configuration of FIG. 8, when the reaction force elastic body 28 is added as shown in FIG. 9A, when the shape memory alloy 26 is in the contracted state and the solar altitude is lowered, the heat collecting plate 25 is irradiated with sunlight. As a result, the temperature of the heat collecting plate 25 is lowered. As a result, the temperature of the connected shape memory alloy 26 also starts to decrease, and when the temperature of the shape memory alloy 26 becomes equal to or lower than the shape recovery temperature, the shape memory alloy 26 yields on the reaction force elastic body 28 and is elongated, As shown in FIG. 9B, the inclination angle of the connected solar cell elements 10 returns to the initial angle. These structures can be deformed as repeated cycles as in the case of FIG. 5 described above.

  Further, if the configuration shown in FIG. 9 is used, when it is installed toward the south, the difference in solar altitude between summer and winter is discriminated and the inclination angle is automatically deformed. FIG. 10 (a) shows the winter season. As shown in the deformed state in the case of FIG. 10B and the deformed state in the summer season in FIG. 10B, it is possible to perform power generation at an optimum angle throughout the year.

  In addition, as shown in FIG. 11, by extending the length of the protrusion of the flange 11a on the upper side of the heat collecting plate 25, the time when the sunlight hits the shape memory alloy 25 can be advanced or delayed. The deformation timing can be shifted. Specifically, in the state where the ridge 11a in FIG. 11A is short, the side surface of the heat collecting plate 25 is irradiated with sunlight, but as shown in FIG. 11B, the ridge 11a is placed on the heat collecting plate 25. If it is extended, the solar radiation is blocked and the heat collecting plate 25 is not irradiated with sunlight. Therefore, the temperature of the heat collecting plate 25 does not increase and the shape memory alloy 26 is not deformed. When the solar altitude is further increased and sunlight is irradiated onto the heat collecting plate 25 beyond the ridge 11a, the temperature of the heat collecting plate 25 starts increasing and the shape memory alloy 26 starts to be deformed. That is, by adjusting the length of the flange 11a, it is possible to intentionally adjust the time timing for changing the tilt angle.

  Further, as shown in FIG. 12, if the shape memory alloy 26 is formed by arranging a plurality of shape memory alloys 26a to 26c having different shape recovery temperatures in series, the shape memory alloy 26 is deformed in the case of FIGS. Is variable in two stages, but can be deformed in multiple stages. For example, if 16a, 26b and 26c have different reaction temperatures and expansion / contraction lengths, the change in inclination angle depending on the season Can be adjusted more finely, the solar cell element 10 can be more directly opposed to the sun, and the generated power can be improved.

  Further, as shown in FIG. 13, by changing the angle variable structure made of the shape memory alloy 26 on both sides of the solar cell element 10, the angle can be changed in three directions, that is, diagonally rightward, upward, and diagonally leftward. I can do it. By adopting this format and installing two sides with variable angle structure in the east-west direction, it is possible to follow the direction of the sun in one day from the sunshine from the east of the morning sun to the sunshine in the evening. . Specifically, as shown in FIG. 13A, when the sun rises from the east in the morning, sunlight is irradiated onto the heat collecting plate 25a, the shape memory alloy 26d contracts, and the photovoltaic power generation element 10 Look east. Thereafter, when the sun approaches the south, the sunlight hitting the heat collecting plate 25a is weakened and the temperature is lowered, and the contraction of the shape memory alloy 26d is restored to its original state by a reaction force spring (not shown), as shown in FIG. As shown, the photovoltaic element 10 faces south. Similarly, when the sun is further tilted to the west, the heat collecting plate 25b is irradiated with sunlight and the shape memory alloy 26e contracts. When the sun goes down and the temperature of the heat collecting plate 25b decreases, the shape memory alloy 26e expands again and returns to its original state.

  Further, although not shown in particular, when a variable angle structure made of a shape memory alloy is similarly installed on the four sides of the solar cell element 10, it follows the day of sunlight (East-South- In addition to the west), it is possible to follow the solar altitude direction and follow the difference in solar altitude in summer and winter. In addition, these structures can also follow the sun more finely by changing the shape memory alloy described above to a plurality of shape memory alloys having different shape recovery temperatures connected in series as in the configuration of FIG. Is possible.

It is a perspective view which shows the angle variable basic structure of the solar cell element which concerns on this invention. It is the detailed figure which expanded the structure part of the angle fluctuation | variation part of the angle variable structure of the solar cell element which concerns on this invention. (A), (b) is a side view explaining the process of variable angle of the angle variable structure of the solar cell element concerning this invention, (a) is a high inclination state, (b) is a low inclination state. It is an external view when it is set as a solar cell module using two or more solar cell elements with the angle variable structure of the solar cell element which concerns on this invention. It is a side view which shows the angle variable structure which added the reaction force elastic body to the angle variable structure of the solar cell element which concerns on this invention. It is the detailed view which expanded and displayed the heat collecting part of the structure which added the reaction force elastic body to the angle variable structure of the solar cell element concerning this invention. It is sectional drawing which shows a structure when using a plurality of angle variable structures of the solar cell element which concerns on this invention, and making it into a solar cell module. (A)-(c) is a side view explaining the process of an angle change in the angle variable structure of the solar cell element with a ridge | corner concerning this invention. (A), (b) is a side view explaining the angle variable process in the angle variable structure of the solar cell element which added the reaction force elastic body which concerns on this invention. (A), (b) is a side view explaining the state of a summer field and a winter field in the angle variable structure of the solar cell element which added the reaction force elastic body and the collar according to the present invention. (A), (b) is a side view which shows the angle variable structure which adjusts the timing of an angle variable by the eaves shape in the angle variable structure of the solar cell element which concerns on this invention, (a) is before a change, (b) Is after the change. It is a side view which shows the example of the solar cell element variable angle structure which has arrange | positioned three shape memory alloys of different shape recovery temperature in series in the variable angle structure of the solar cell element which concerns on this invention. (A), (b) is a side view which shows the example which gave the angle variable structure to two sides in the angle variable structure of the solar cell element which concerns on this invention, (a) was incident from the diagonal. An inclination following state at the time, (b) is an inclination state when sunlight enters from above. It is structure explanatory drawing of the solar cell module made with the conventional lamination type manufacturing method. It is explanatory drawing of the conventional structure which mounted and fixed the conventional solar cell module on the installation stand.

Explanation of symbols

1: power generation unit 2: angle variable unit 3: rotating unit 4: base 10: solar cell element 11: frame 11a: roof 17: roof 18: installation base 19: junction box 20: solar cell module 21: frame 22 : Sealing material 23: Solar cell element 24: Light transmission plates 25, 25 a, 25 b: Heat collecting plates 26, 26 a to 26 e: Shape memory alloy 27: Heat insulating material 28: Reaction force elastic body 29: Weather resistant film 41: Strut 41a: Hinge part 42: Surface translucent part 43: Air layer

Claims (6)

A base, a solar cell element installed on the base, the solar cell element disposed between the base and the solar cell element, and the length of the solar cell element with respect to the base being changed by heat An installation structure of a solar cell element, comprising installation angle variable means for changing the installation angle. 2. The solar cell according to claim 1, wherein the installation angle varying unit includes an expansion / contraction part whose length is expanded and contracted by heat, and a heat collection part that collects heat transmitted to the expansion / contraction part. Element installation structure. The solar cell element installation structure according to claim 2, wherein the stretchable portion has a configuration in which a plurality of shape memory alloys having different deformation temperatures are connected in series. 4. The solar cell element installation structure according to claim 2, wherein a plurality of the stretchable parts are arranged along one side of the solar power generation element. 5. 4. The solar cell element installation structure according to claim 2, wherein a plurality of the stretchable parts are arranged along two opposing sides of the solar power generation element. 5. 6. The solar cell element according to claim 1, wherein the installation angle is varied so that an angle between an incident angle of sunlight and a light receiving surface of the solar cell element approaches 90 degrees. Installation structure.

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