JP5088222B2 - Solar cell module - Google Patents

Description

 The present invention relates to a solar cell module including a solar cell that converts solar energy into electrical energy.

  2. Description of the Related Art Conventionally, a solar cell module that includes a large number of solar cells that convert solar energy into electrical energy and that has the solar cell module mounted on a vehicle is generally known. (For example, Patent Documents 1 and 2). In patent document 1, the solar car provided with the solar cell in the part which sunlight of a vehicle hits is shown, and in patent document 2, further improvement in fuel consumption is achieved by mounting the solar cell on the hybrid vehicle.

It has also been pointed out that the power generation effect decreases when the temperature of solar cells constituting the solar cell module rises due to solar radiation. Therefore, in order to suppress such reduction in the power generation effect of the solar cell, an apparatus for cooling the solar cell has been proposed. (For example, Patent Documents 1 and 3).
JP-A-4-356213 JP 2002-281604 A JP-A-11-165530

  In the prior art described in Patent Documents 1 and 3, the ventilation means is used to release air with heat around the solar cell to suppress the temperature rise of the solar cell. However, this method requires a device for ventilation. Furthermore, since the solar cell and the body are always in contact with each other, the heat from the body is always received. For this reason, when the body is hot, the solar cell also becomes hot and the effect of suppressing the temperature rise is reduced. There was also no device to shut off the heat from the body.

  Therefore, the present invention has been made paying attention to the above points, and aims to improve the conventional structure in which heat is transferred from a high heat body to the solar cell and to suppress a decrease in the power generation effect of the solar cell. And

  According to the present invention, the solar cell can be separated from the body member, and the movement of heat from the body can be blocked by the separation. Conversely, if the solar cell is hotter than the body member, the heat of the solar cell can be released to the body side by bringing the solar cell into contact with the body member.

According to claim 1, according to claim 1, in the solar cell module in which the solar cells are concentrated, the solar cell or the heat transfer member can be moved up and down. Thereby, since the heat transfer member under the solar cell and the solar cell can be contacted and separated, heat can be conducted and blocked between the solar cell and the heat transfer member. When the temperature of the solar cell is equal to or higher than the temperature of the heat transfer member, the solar cell and the heat transfer member can be brought into contact with each other to release heat, and when the temperature of the solar cell is lower than the temperature of the heat transfer member, both To isolate the heat.

According to claim 2, it is possible to make it difficult for heat to be transmitted between the body and the solar cell by making the material of the solar cell higher in thermal conductivity than the material of the support member.

According to claim 3 or 4, in the solar battery vehicle on which the solar battery is mounted, the heat transfer member according to claim 1 or 2 is a body member of the vehicle. Thereby, it is not necessary to provide a heat transfer member separately by using the body member of a vehicle as a heat transfer member.

According to claim 5, the photoelectric conversion device includes a solar cell and a fixing plate for fixing the solar cell. The fixed plate is interposed between the solar cell and the support member, and can be moved up and down integrally with the solar cell. By providing the fixing plate, even if the solar cell is light and thin, the fixing plate becomes a base and the strength can be increased.

According to claim 6 , the temperature of the solar cell and the temperature of the heat transfer member are measured, and when the temperature of the solar cell is higher than that of the heat transfer member, it is brought into contact with the heat transfer member. In case, keep away from heat transfer member. Thereby, it can reduce that a solar cell becomes high temperature and power generation amount falls.

  According to the present invention, when the temperature of the solar cell is equal to or higher than the temperature of the heat transfer member, the solar cell and the heat transfer member are brought into contact, and when the temperature of the solar cell is lower than the temperature of the heat transfer member, the solar cell is It is possible to suppress a decrease in the amount of power generation by separating from the distance.

  Below, an example is demonstrated with reference to drawings about the structure of the vehicle carrying the solar cell module of this invention. FIG. 1 shows a roof portion of a vehicle equipped with a solar cell of the present invention. As shown in FIG. 1, the body member 3 of the roof portion has a wide dent depressed in the room direction, and the tempered glass 1 is installed on the extended line of the portion not depressed. Thereby, a space 7 surrounded by the body member 3 and the tempered glass 1 is provided. A fixed plate 4 to which the solar cell module 2 is fixed is disposed in the space 7. The fixing plate 4 is supported by a support member 5 as shown in FIG. 1, and the support member 5 penetrates through the body member 3 and is connected to a connecting member 6 b of a motor 6 a fixed to the body member 3. In addition, the upper surface of the body member 3 in the depressed portion and the lower surface of the fixing plate 4 have the same shape so that they can be brought into close contact when contacted. Further, by using stainless steel having high thermal conductivity and strength as the material of the fixing plate 4, it becomes easy to release heat to the body member 3.

  FIG. 2 is a view of the roof as viewed from directly above. Two solar cell modules 2 each including a large number of solar cells 12 are arranged and fixed on a fixing plate 4. The fixed plate 4 is supported by the support member 5 at a plurality of locations as shown in FIG. The hollow part of the body member is provided with a plurality of circular openings 11, and the cylindrical part 5 a of the support member 5 passes through the circular opening 11. The cylindrical portion 5a is made of, for example, fluororubber having a height of about 10 mm and a radius of about 10 mm, and has a high heat insulating property and has a blocking effect so that heat from the other is not transmitted to the fixed plate 4. Moreover, the temperature sensor 9 of FIG. 2 is the body temperature sensor 9 which measures the temperature of the body member 3 which is a heat transfer member, and the temperature sensor 10 is the solar cell temperature sensor 10 which measures the temperature of the solar cell 12 of the photoelectric conversion device. It is.

  FIG. 3 is a view of the roof as viewed from directly below. The support member 5 includes a cylindrical portion 5a whose upper portion is in contact with the fixed plate 4, and a rod-shaped portion 5b that connects the many cylindrical portions 5a to the central cylindrical portion 5a. The central cylindrical portion 5a is provided with a moving device 6, and the connecting member 6b moves up and down by the rotation of the motor 6a, so that the entire support member 5 can move up and down.

  Therefore, when the support member 5 moves up and down, the fixing plate 4 supported by the support member 5 moves up and down. The downward movement range is set until the lower surface of the fixing plate 4 comes into contact with the upper surface of the body member 3. The upward movement range is such that the fixed plate 4 and the body member 3 need only be separated from each other, so that the distance between them is, for example, about 1 cm. When the fixing plate 4 moves up and down in the above range, heat conduction or blocking between the body member 3 and the fixing plate 4 is possible.

A specific method for raising and lowering the support member 5 is as follows. First, electricity converted from sunlight by the solar cell 12 is transmitted through a conducting wire (not shown) extending from the solar cell 12 and stored in a battery (not shown). Moreover, the conducting wire extended from the solar cell 12 is connected also to the motor 6a, and the motor 6a moves with the electric power of a solar cell or a battery. The connecting member 6b has a screw structure, and the rotational movement caused by the rotation of the motor 6a is converted into the vertical movement. Therefore, the support member 5 fixed to the connecting member 6b moves up and down as the motor 6a rotates. The vertical motion of the solar cell 12 can be controlled by controlling the rotational motion of the motor 6a.

  Control of the vertical movement of the solar cell is performed by an ECU (not shown), and the control of FIG. 4 is executed with reference to the signals of the temperature sensor 9 and the temperature sensor 10. The start is when the solar cell 12 receives sunlight and converts it into electrical energy. The solar cell has a problem that the amount of power generation decreases when the heat is high, and control is started from the start of power generation.

  First, in step S1, the temperature T (body) of the body member 3 is measured from the body temperature sensor 9, and the temperature T (cell) of the solar cell 12 is measured from the solar cell temperature sensor 10. For example, measurement is repeated every minute. The body temperature sensor 9 and the solar cell temperature sensor 10 are both measured by the electric power from the solar cell 12. Further, the body temperature sensor 9 need only be able to measure the temperature of the body, so it does not have to be at the position shown in FIG. 2, and the body temperature may be measured using an outside air temperature measuring device of an air conditioner.

  Next, in step S2, T (cell) and T (body) measured in step S1 are compared. If T (cell) is larger than T (body), the process moves to step S3. Conversely, if T (body) is larger than T (cell), the process moves to step S5.

  In step S <b> 3, it is determined whether or not the fixing plate 4 that fixes the solar cell module 2 is in contact with the body member 3. As a determination means, it can determine by measuring the rotation speed of the motor 6a attached to the body member 3, or the position of the connection member 6b. As a result of the determination, if the fixing plate 4 is separated from the body member 3, the process proceeds to step S4, and if it is in contact, the process returns to step S1. Further, the solar cell module 2 may be directly connected to the support member 5 without the fixing plate 4. In that case, what is necessary is just to determine whether the solar cell module 2 is contacting the body member 3. FIG.

  When it progresses to step S4, the fixing plate 4 and the body member 3 are made to contact. Specifically, the motor 6a is rotated, the rotation amount is converted into a downward movement amount by the connecting member 6b, and the support member 5 is moved downward. The fixed plate 4 and the solar cell module 2 supported by the support member 5 move downward, and the operation is terminated when the fixed plate 4 comes into contact with the body member 3. When the fixing plate 4 and the body member 3 are in contact with each other, the heat of the fixing plate 4 can be released to the body member 3. Thereafter, the process returns to step S1.

  If it is determined in step S2 that T (body) is larger than T (cell), the process proceeds to step S5. In step S5, the same determination as in step S3 described above is performed. If the fixing plate 4 is separated from the body member 3, the process returns to step S1, and if it is in contact, the process proceeds to step S6. Similarly to step S <b> 3, if there is no fixing plate 4 and the solar cell module 2 is directly supported by the fixing member 5, it may be determined whether or not the solar cell module 2 is in contact with the body member 3.

  When it progresses to step S6, it operates so that the fixed plate 4 and the body member 3 may leave | separate. Specifically, the motor 6a is rotated in the reverse direction as in step S4, the amount of rotation is converted into an upward movement amount by the connecting member 6b, and the support member 5 is moved upward. The fixed plate 4 and the solar cell module 2 supported by the support member 5 move upward, and the operation is terminated when the fixed plate 4 is separated from the body member 3. The distance between the fixing plate 4 and the body member 3 at the end of the operation is about 1 mm because it is sufficient if there is a gap. When finished, the process returns to step S1.

  In the above-described embodiment, the solar cell module 2 is disposed in the space 7 surrounded by the body member 3 and the tempered glass 1. However, the solar cell module 2 is not limited to this space and is disposed along the body member 3 and surrounded by the tempered glass. You may not be in the state. Moreover, you may use together the structure which provides a clearance gap in the body member 3 and the tempered glass 1, and ventilates like FIG.

  In the said Example, although the fixing plate 4 which fixes the solar cell module 2 was used, you may fix the solar cell module 2 to the supporting member 5 directly like FIG.

  In the above embodiment, the fixing plate 4 is operated and brought into contact with the body member. However, the body member 3 that is a heat transfer member may be operated and brought into contact with the fixing plate 4 as shown in FIG.

  In the above embodiment, the support member 5 is formed of the cylindrical portion 5a and the rod-shaped portion 5b. However, the rod-shaped portion 5b may be plate-shaped.

  In the above embodiment, the rod-shaped portion 5b of the support member 5 is a heat insulating member, but the portion of the rod-shaped portion 5b that contacts the body member 3 is made of the same material as the body member 3 as shown in FIG. The strength of the member 3 may be increased.

  In the above embodiment, the vehicle is mounted on the vehicle as shown in FIG. 9, but it may be arranged on an inanimate object such as a roof of a building as shown in FIG. In that case, the body member 3 used as the heat transfer member can be replaced with, for example, a roof member.

  In the above embodiment, the solar cell and the fixing plate are mounted on the roof portion of the vehicle.

  In the above embodiment, the ECU executes the control flow of FIG. 4 and operates the motor to move the solar cell up and down. However, for example, a device that displays the values of the temperature sensors 9 and 10 in the vehicle and the sun manually by the passenger A mechanism for raising and lowering the battery may be provided, and the passenger may compare the temperature of the solar battery and the body so that the solar battery is contacted or separated.

  Of course, various design changes can be made without departing from the scope of the present invention.

FIG. The figure which looked at the roof part from right above. The figure which looked at the roof part from the bottom. A series of control flowcharts. An example that does not include the fixed plate and the rod-shaped part. An example in which the body member is variable up and down. The example which used the material of the body member for some support members. An example with a vent. An example in which a solar power generation system is mounted on the roof of a house or the like. Example mounted on a vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tempered glass 2 ... Solar cell module 3 ... Body member 4 ... Fixing plate 5 ... Support member, 5a ... Cylindrical part of support member, 5b ... Rod-like part of support member 6 ... Moving device, 6a ... Motor, 6b ... Connecting member 7 Space 9 Body temperature sensor 10 Solar cell temperature sensor 11 Circular port 12 Solar cell 13 Cylindrical iron plate 14 Ventilation port

Claims (6)

In a power generation device equipped with a photoelectric conversion device that converts light into electrical energy,
A heat transfer member;
A support member for supporting the photoelectric conversion device or the heat transfer member, having a moving device for moving the photoelectric conversion device or the heat transfer member so that a distance between the photoelectric conversion device and the heat transfer member is variable;
With
The moving device has a first operation that operates to bring the photoelectric conversion device into contact with the heat transfer member when a temperature of the photoelectric conversion device is equal to or higher than a temperature of the heat transfer member; When the temperature is lower than the temperature of the heat transfer member, at least one of the second operation that operates to separate the photoelectric conversion device and the heat transfer member is possible.
Power generation device. In a power generation device equipped with a photoelectric conversion device that converts light into electrical energy,
A heat transfer member;
A support member for supporting the photoelectric conversion device or the heat transfer member, having a moving device for moving the photoelectric conversion device or the heat transfer member so that a distance between the photoelectric conversion device and the heat transfer member is variable;
With
The photoelectric conversion device and the heat transfer member can be contacted and separated by the moving device,
The material of the photoelectric conversion device is a material having a higher thermal conductivity than the support member,
Power generation device. In a power generator equipped with a photoelectric conversion device that is mounted on a vehicle and converts light into electrical energy,
A body member of the vehicle;
A support member that supports the photoelectric conversion device or the body member, and includes a moving device that moves the photoelectric conversion device or the body member so that a distance between the photoelectric conversion device and the body member is variable;
The photoelectric conversion device and the body member can be contacted and separated by the moving device.
Power generation device. The photoelectric conversion device is mounted on a vehicle,
The heat transfer member is a vehicle body member;
Wherein the photoelectric conversion device by a mobile device is capable body member separable vehicles, power generating apparatus according to claim 1 or 2. The photoelectric conversion device has a photoelectric conversion element and a fixing plate to which the photoelectric conversion element is fixed,
The support member supports the fixing plate,
The power generator according to any one of claims 1 to 4 , wherein the fixed plate can be brought into and out of contact with the heat transfer member by the moving device. Photoelectric conversion device temperature measurement means for measuring the temperature of the photoelectric conversion device;
A heat transfer member temperature measuring means for measuring the temperature of the heat transfer member;
With
Temperature When the temperature of the photoelectric conversion device measured by the photoelectric conversion device temperature measurement means is equal to or higher than the temperature of the heat transfer member measured by the heat transfer member temperature measurement means, the moving device is the photoelectric conversion device and the heat transfer member If the temperature of the photoelectric conversion device is lower than the temperature of the heat transfer member, the photoelectric conversion device is separated from the heat transfer member.
The power generator according to any one of claims 1 to 5 .

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