JPH09186353A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the decline in power generation efficiency due to the temperature rise in the title solar cell module. SOLUTION: Within the title solar cell module 11 wherein plural solar cell elements 12 in the state juxtaposed in planar mode and electrically connected formed in panel mode integrally wrapped up in a transparent member such as a glass or resin, etc., a heat conductive member 16 in high heat conductivity is heat transferably provided inside or outside of the transparent member 18 to be the back side of the elements 12. Simultaneously, the heating part 17a of a heat pipe 17 is heat transferably fitted to said heat conductive member 16, furthermore, radiating members 20 are provided in the outer edge parts formed in said panel mode and then the radiating part 17b of the heat pipe 17 is heat transferably fitted to this radiating member 20 to increase the cooling efficiency thereby avoiding the decline in the power generation efficacy due toe temperature rise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module in which a plurality of solar cell elements are electrically connected and integrated.

[0002]

2. Description of the Related Art A conventional solar cell module 1 for a solar power generation system is shown in FIG. This is because a plurality of solar cell elements 2 are arranged in a plane, and these solar cell elements 2 are embedded in a transparent resin filler 4 in a state where they are electrically connected by an interconnector 3, and 2 has a transparent surface material 5 such as glass on one side (the upper side in FIG. 3) of the resin filler 4 which is the sunlight incident side, and the other side of the resin filler 4 which is the back side of the solar cell element 2. Is provided with a backing material 6 such as a metal plate to sandwich the resin filler 4 from both sides, and a metal such as aluminum so as to surround the outer periphery of the surface material 5 and the backing material 6 which sandwich the resin filler 4 from both sides. It is integrated by providing a frame 7 made of it.

This panel-shaped solar cell module 1 is
In addition, multiple units are combined to increase the capacity, for example, on the roof or wall of a building, or directly on the ground or on a pedestal.
It is installed in a predetermined direction and angle so that sunlight can be received most efficiently. As a result, the solar cell module is exposed not only to solar energy but also to solar thermal energy, and the surface temperature thereof may reach 50 ° C. or higher.

On the other hand, it is known that the power generation efficiency of a solar cell changes depending on the element temperature, and generally, the higher the temperature, the lower the efficiency. For example, although the characteristics differ depending on the base material (silicon-based or gallium arsenide-based) of the solar cell element, in the case of a single crystal silicon cell, if the power generation efficiency at 25 ° C is 100%, the element temperature will be higher than 25 ° C. The efficiency decreases by about 0.5% for every 1 ° C increase.

Therefore, in this type of conventional solar power generation system, the battery capacity (the number of modules) is adjusted so that the required power generation capacity can be secured even under adverse conditions in anticipation of a decrease in power generation efficiency due to an increase in element temperature. ) Was often planned to be increased above the rating.

[0006]

Therefore, in the above-mentioned conventional solar power generation system, the battery capacity (the number of modules) is designed to be higher than the rating in order to secure the necessary power generation capacity. This causes an increase in the cost of equipment and also a hindrance to the spread of solar power generation systems.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a solar cell module having high power generation efficiency and capable of effectively utilizing solar heat energy.

[0008]

Means for Solving the Problems and Actions Thereof As a means for solving the above problems, the present invention is directed to a transparent material such as glass or resin in a state in which a plurality of solar cell elements are arranged in a plane and electrically connected. In a solar cell module which is integrally encapsulated with a member and formed into a flat plate, a heat transfer member having a high heat conductivity is provided inside or outside the transparent member, which is the back side of the solar cell element, so that heat can be transferred. At the same time, the heating part of the heat pipe is attached to the heat transfer member so that heat can be transferred, and further, a heat dissipation member is provided on the outer edge of the flat plate, and the heat dissipation part of the heat pipe is attached to the heat dissipation member so that heat transfer can be performed. Is characterized by.

With the above construction, the solar cell module of the present invention absorbs heat by the heat pipe having the heating portion attached to the heat transfer member disposed on the back side of the solar cell element, and the heat is radiated by the heat radiating member. And is radiated to the atmosphere from this heat dissipation member. Therefore, this solar cell module, when the temperature rises due to solar heat energy,
Since it is immediately cooled by the heat pipe, a decrease in power generation efficiency due to an increase in element temperature is prevented, and high power generation efficiency is always maintained. Furthermore, if a heat exchanger such as a water heater is attached to the heat dissipation member, heat energy can be efficiently recovered,
It can be effectively used.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the solar cell module of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows a first embodiment of the solar cell module of the present invention. This solar cell module 11
The plurality of solar cell elements 12 are arranged on the same plane in three rows, and the solar cell elements 12 are connected in series or series-parallel by an interconnector 13.

A plate-like surface material 14 made of a transparent material such as a glass plate is provided on the sunlight incident side (upper side in FIG. 1) which is the surface of the solar cell elements 12 arranged on the same plane. Provided in parallel with the surface of the solar cell element 12, and on the back side (lower side in FIG. 1) of the solar cell element 12 is a tempered glass plate, a corrosion-resistant aluminum plate, a weather-resistant resin plate, or the like. A back material 15 is provided in parallel with the back surface of the element. That is, the surface material 14 and the back material 15 are provided on both sides of the solar cell element 12,
It is provided so as to hold the space and sandwich it from both sides.

Further, the solar cell element 12 and the backing material 1
A heat transfer block 16 made of metal such as a copper plate or an aluminum plate, which is a heat transfer member, is arranged in the space between the heat transfer member 5 and the solar battery element 12 so as to face the back surfaces of all the solar cell elements 12, and A heating portion 17a of a heat pipe 17 is fixed to the block 16 so that heat can be transferred.

In the space between the surface material 14 and the back surface material 15 in which the solar cell element 12, the heat transfer block 16 and the heating part 17a of the heat pipe 17 are arranged, a filling material 18, such as EVA, is used. Resin (Ethylene Vinylacet
light transparency (transparency) such as ate Copolymer), impact resistance,
A resin 19 having excellent ozone resistance and weather resistance is filled and cured integrally to form a panel shape, and a frame 19 and a heat dissipation frame 20 made of corrosion resistant aluminum are provided so as to surround the outer circumference. This heat dissipation frame 20
The heat radiating portion 17b of the heat pipe 17 is in close contact with the inner surface of the heat pipe 17 so that heat can be transferred, and a large number of heat radiating fins 20a are formed on the outer side of the heat radiating frame 20.

Next, the operation of the solar cell module of this embodiment constructed as described above will be described.

For example, the solar cell modules 11 are used by connecting a plurality of them so that the heat radiating frame 20 is the outer circumference. When the surface of each solar cell module 11 is irradiated with sunlight, the solar energy transmitted through the transparent surface material 14 and the filling material 18 is received by each solar cell element 12.

Then, the solar energy received by the solar cell element 12 is converted into electric energy to generate a current. Therefore, by connecting the load resistance between both electrodes, a current flows, and electric power is taken out to function as a battery.

At this time, since solar heat energy exists in the irradiated sunlight in addition to sunlight energy, the solar cell module 11 is heated by this solar heat energy. When the temperature of each solar cell element 12 rises due to heating, the power generation efficiency decreases, but in the solar cell module 11 of this embodiment, the heat transfer block 16 embedded in the filler 18 allows heat to be generated from a wide range. In addition to collecting, the collected heat is transferred to the heat radiating portion 17b by the heat pipe 17 in a large amount, and is efficiently transferred to the heat radiating frame 20 side in the heat radiating portion 17b, and is dissipated into the atmosphere from each heat radiating fin 20a. Since it is cooled, the temperature rise of the solar cell element 12 is prevented, and high power generation efficiency is maintained.

Further, since the heat transported by the heat pipe 17 is transferred to the heat radiation frame 20, for example, the preheating pipe of the hot water supply facility is arranged so that heat can be exchanged by winding the heat radiation fins 20a of the heat radiation frame 20. if,
It is possible to remove heat from the solar cell module 11 to cool it, prevent a decrease in power generation efficiency due to a temperature rise, and effectively use the recovered heat.

FIG. 2 shows a second embodiment of the solar cell module of the present invention. In this solar cell module 21, a plurality of solar cell elements 22 are arranged on the same plane and each solar cell element is arranged. 22 are connected in series or series-parallel by an interconnector 23. The surface material 24 and the back surface material 2 are provided on both sides of the solar cell element 22.
5 and 5 are provided so as to hold the space and sandwich it from both sides. In this space, EVA resin (Ethylene Vinylacet
light transparency (transparency) such as ate Copolymer), impact resistance,
Resin filler 2 with excellent physical properties such as ozone resistance and weather resistance
8 is filled and cured integrally to form a panel shape. The panel-shaped outer periphery is provided so as to surround a frame 29 made of corrosion-resistant aluminum and a heat dissipation frame 30 having a large number of heat dissipation fins 30a.

A heat transfer block 26 made of metal such as a copper plate or an aluminum plate is provided outside the backing material 25.
Are provided in close contact with the back material 25. A heat pipe 27 is provided so that its heating portion 27a is in close contact with the heat transfer block 26 so that heat can be transferred, and the heat radiating portion 2 thereof is provided.
7b is inserted into the hole formed in the heat dissipation frame 30 with good heat transfer using a thermal joint or the like.

With the above-mentioned structure, the same operational effect as in the case of the solar cell module of the first embodiment can be obtained, and in the first embodiment, the heat transfer embedded in the filler is achieved. Since the block and the heat pipe are provided on the outside of the back surface material of the solar cell module, the structure is simplified and the heat transfer block and the heat pipe can be assembled separately from the solar cell element, which facilitates manufacturing. There is an advantage.

[0023]

As described above, in the solar cell module of the present invention, the heat transfer member is provided inside or outside the transparent member on the back side of the solar cell element, and the heat transfer member is provided with the heating portion of the heat pipe. Since the solar cell module is mounted so that the heat of the solar cell module is transported to the heat dissipation member to be cooled, the temperature rise of the solar cell module is prevented and high power generation efficiency can be maintained.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing a solar cell module according to a first embodiment of the present invention.

FIG. 2 is a sectional side view showing a solar cell module according to a second embodiment of the present invention.

FIG. 3 is a sectional side view showing an example of a conventional solar cell module.

[Explanation of Reference Signs] 11,21 ... Solar Cell Module, 12,22 ... Solar Cell Element, 13,23 ... Interconnector, 14,2
4 ... Surface material, 16, 26 ... Heat transfer material, 17, 27 ... Heat pipe, 18, 28 ... Filler material, 20, 30 ... Heat dissipation frame.

Claims (1)

[Claims] 1. A solar cell module comprising a plurality of solar cell elements arranged in a plane and electrically connected to each other so as to be integrally covered with a transparent member such as glass or resin to form a flat plate. A heat transfer member having a high thermal conductivity is provided inside or outside the transparent member that is the back side of the battery element so as to be able to transfer heat, and a heating portion of a heat pipe is attached to the heat transfer member so as to be able to transfer heat. A solar cell module, wherein a heat radiating member is provided on an outer edge portion of the flat plate, and the heat radiating portion of the heat pipe is attached to the heat radiating member so that heat can be transferred.