JPH0969647A - Solar battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with various kinds of loads, to use a solar battery device for multiple purposes without limiting to emergency and to easily carry it, and at the same time to prevent the characteristics of, for example, a solar battery and a storage battery from deteriorating as much as possible. SOLUTION: In a solar battery device S where a solar battery 1 and a power converting means 7 for converting a DC power generated by the solar battery 1 to an AC power are provided in one piece, a flat heat absorber for absorbing heat generated by the solar battery 1 and/or the power converting means is provided at the reverse side of the solar battery device S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell device which can cope with various loads, can be conveniently carried and can be used for various purposes without any complicated preparation for use.

[0002]

2. Description of the Related Art A solar cell module in which a plurality of solar cell elements are connected in series and / or in parallel has a basic characteristic of outputting DC power only when there is illuminance such as daytime. Therefore, when using at night or using an AC load, apart from the solar cell module, an output control device that controls the operating point of the solar cell module, a DC / AC converter that converts DC power into AC power, a storage battery, etc. Was prepared, and each wiring was performed before use.

However, the above-mentioned preparation for use is very complicated, and it is completely impossible for anyone other than a person having special knowledge to obtain the members and wiring. In particular, considering the case of using it as a power source for disaster countermeasures, the solar cell module has the advantage that it does not need fuel supply at all, but it is difficult to prepare for use and difficult to deal with. From the point of view, it was rarely used, and there was no solar cell device that was convenient to carry and could be effectively used as an emergency power supply device.

Further, there is known one in which a plurality of solar cell devices in which an inverter and a capacitor are integrally provided with a solar cell are simply connected in parallel (actually, in Japanese Utility Model Publication 7-3.
(See Japanese Patent Publication No. 0557), only with such a configuration, the characteristics of the solar cell may be deteriorated by heat generated by the solar cell under the hot sun in the daytime, and, for example, the operation of electronic components forming an inverter may be adversely affected. With the storage battery, it is not possible to solve the problem that the performance of the storage battery is significantly impaired.

In addition, in order to use such a solar cell device as a portable device, a member for fixing the solar cell device at an inclined position is required, and power is supplied to an external load during transportation. If the output terminal portion is exposed, there is a problem that moisture and dust may adhere to the exposed portion, or the output terminal portion may become inoperable or a short circuit may occur.

Therefore, the present invention does not require complicated preparations for use, can cope with various loads, is convenient not only for emergency but also for multipurpose use, and can be used to prevent deterioration of characteristics of solar cells and storage batteries as much as possible. It is an object of the present invention to provide a novel and epoch-making solar cell device which can be prevented.

[0007]

In order to solve the above-mentioned problems, the solar cell device of the present invention integrally includes a solar cell and a power conversion means for converting DC power generated by the solar cell into AC power. The solar cell device provided in the above, wherein a flat heat absorber that absorbs heat generated from the solar cell and / or the power conversion means is disposed on the back side of the solar cell device. To do.

A solar cell device integrally provided with a solar cell and a storage battery for storing power generated by the solar cell, wherein the solar cell and / or the storage battery are provided on the back side of the solar cell device. A flat heat absorber that absorbs the generated heat is disposed.

Furthermore, the heat absorber may be formed by arranging a plurality of heat pipes in parallel.

Here, an output terminal portion such as an output terminal for deriving AC power from the power conversion means or a connection terminal for connecting other solar cell devices having the same structure may be integrally provided.

Further, in order to enable transportation and tilt installation of the solar cell device, for example, a foldable tilt installation stand that can be stored on the back side of the solar cell is provided, and when the stand is housed, a load is applied. You may make it provide the stand with the cover body which consists of an insulator which completely covers the output terminal for supplying electric power to, and the connection terminal for connecting between solar cell devices.

Furthermore, the stand may be formed of a material having good heat conductivity, for example, aluminum or its alloy, and used as a heat sink connected to the heat absorber.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described in detail. As shown in FIG. 1, on the light-receiving side of the solar cell device S, a solar cell module (hereinafter, referred to as a solar cell) 1 in which solar cell elements made of polycrystalline silicon are connected in series and in parallel is arranged, and is foldable. A stand 2 for tilt installation made of aluminum is provided on the back surface side of the solar cell 1 so as to be foldable, and tilted at an arbitrary angle so that the light receiving surface 1a of the solar cell 1 can be oriented at an optimum angle with respect to the sun rays. Can be made. The solar cell element may be single crystal or amorphous silicon or a solar cell element other than silicon.

Further, as shown in FIG. 2, the stand 2 is folded on the back surface 1b of the solar cell 1 so that the solar cell device S can be easily carried. Further, as shown in FIG. 3, it is also possible to configure a large-capacity solar cell panel P by connecting a plurality of solar cell devices S with the stand 2 folded.

On the back side 1b of the solar cell 1, as shown in FIG.
As will be described later, as will be described later, output control means for controlling the operating point of the solar cell 1, power conversion means for converting the DC output from the output control means into AC, and output described below for deriving the output from the power conversion means. Control unit 3 integrally provided with an output terminal unit 5 and the like, a thin storage battery 4 such as Ni-Cd, Ni-Mn, and a lithium-ion storage battery, and the like. It is placed on the body.

Here, the heat transporting means for releasing the heat generated from the solar cell 1, the control unit 3 including the power converting means, the storage battery 4 and the like into the atmosphere will be described. As shown in FIG. 5, the heat transporting means is a heat absorbing plate in which a plurality of flat heat pipes 22 are arranged side by side to form a plate shape, and the control unit 3, the storage battery 4 and the like are mounted on the heat absorbing plate. (Heat absorber)
21 and a heat sink 23 having a plurality of aluminum fins formed in a region where the control unit 3 and the storage battery 4 are not mounted so that heat is efficiently radiated into the atmosphere.
Consists of With this configuration, the phase change of the working fluid (water, CFCs or alcohols) enclosed in the heat pipe 22 is used to absorb the heat generated from the control unit 3, the storage battery 4, etc., and the heat sink side. The heat generated from the solar cell 1 and other members integrally provided with the solar cell 1 can be effectively dissipated by transporting the solar cell to the solar cell 1, and the adverse effect on the operation of the electronic components forming the control unit 3 and The performance deterioration of the storage battery can be prevented as much as possible.

As shown in FIG. 6, the heat pipe 22
Is a flat pipe made of copper or aluminum, and has a wick 22a formed therein to cause a capillary phenomenon in the pipe, and the flow of the working fluid is realized by the capillary pressure. Here, the wick 22a is made of, for example, a wire mesh, a sintered metal, a metal foam, a porous material such as felt, or a groove. Furthermore, the heat pipe 22 may be integrally extruded as shown in FIG.

A cover body 21 made of an insulating resin is attached to the stand 2 so that the stand 2 completely covers output terminals and connecting terminals described later. As a result, the output terminal portion is not exposed during transportation of the solar cell device S, and moisture and dust do not adhere to the solar cell device S to prevent operation and short circuit.

Next, a specific circuit configuration of the solar cell device S will be described. As shown in FIG. 8, the solar cell 1 is connected to an output control means 6 which is a step-up type maximum output point tracking circuit for controlling the operating point of the solar cell 1, and the DC output from the output control means 6 is connected to the output control means 6. A power conversion means 7 for converting into alternating current is connected. The storage battery 4 is connected between the output control means 6 and the power conversion means 7 via a charge / discharge control means 8 for preventing over-discharge, over-charge, over-current and the like. The storage battery 4 is detachable, which makes maintenance and replacement of the storage battery 4 as easy as possible.

An output terminal portion 5 is connected to each of the power conversion means 7 and the charge / discharge control means 8. Here, an AC output terminal portion is connected to the power conversion means 7, an AC load terminal 11 for connecting to an external AC load 9 or a commercial power source 10, and another solar cell device 1 having the same configuration.
Connecting terminal 13 for connecting to 2 to increase supply capacity
Is provided. A plurality of connection terminals 13 may be provided, and when another solar cell device is connected to the connection terminal, the frequency of the AC output of the conversion means is autonomously controlled, or the conversion means of the other solar cell device is connected. It can be synchronized with the AC output of.

Further, the charge / discharge control means 8 is provided with a DC output terminal portion, which charges the DC load terminal 15 for connecting to the external DC load 14 and the external storage battery 16 or externally to the storage battery 4. A charging terminal 17 is provided so that charging can be performed from a power source.

With this configuration, when the illuminance becomes high in the daytime, the DC power of a constant voltage is supplied to the power conversion means 7 and the charge / discharge control means 8 via the output control means 6.
Is supplied to. The power converting means 7 converts the AC power into a predetermined AC power and supplies the AC power to the external AC load 9 via the AC load terminal 11 in the output terminal section 5. At this time, when the AC load terminal 11 is connected to the commercial power source 10 for the purpose of system interconnection reverse power flow or the like, the power conversion means 7 is caused to measure the cycle of the commercial power source 10 and the AC output is automatically synchronized. I am trying to let you.

Further, since the power converting means 7 is provided with a plurality of connecting terminals 13, for example, another solar cell device having the same structure is connected to the connecting terminal 13 so that the AC load terminal 1 is connected.
1 can supply a large amount of electric power.

The generated power from the solar cell 1 is supplied to the storage battery 4 via the charge / discharge control means 8, and the storage battery 4 is supplied from an external power source through the charging terminal 17.
Since the battery can be charged, it is possible to supply power from the storage battery 4 to the external AC load 9 through the power conversion means 7 even in a dark environment such as at night.

Next, a case will be described in which an AC / AC converting means is provided between the load and the converting means which requires an AC power of a different type from the output from the power converting means 7 as an input.

In the conventional commercial power supply reverse flow type solar power generation system, when there are loads that require a plurality of different types of AC power as inputs, a plurality of types of DC / AC conversion means should be connected to the solar cell. I was doing. Therefore, it is essential to develop a special device such as an inverter that converts 150V DC to 200V three-phase AC.
Since each of the DC / AC conversion means is connected to the solar cell, it is necessary to incorporate a control circuit such as a maximum output point tracking device in each. In addition, it is necessary to wire a plurality of types of AC wiring over almost the entire system, which makes the wiring very complicated.

Therefore, as shown in FIG. 9, when the power conversion means 7 is a DC / single-phase AC 100V conversion means, the power conversion means 7 is designed to allow reverse flow to the commercial power supply 10 of single-phase AC 100V. Power conversion means 7
The single-phase AC 100V loads 18 and 19 can be connected to the three-phase AC 200V load 30, and can be connected to the three-phase AC 200V load 30 via the single-phase AC 100V / three-phase AC 200V conversion means 20. In addition, 40 is a three-phase alternating current 200V power supply. With such a configuration, it is possible to apply to a photovoltaic power generation system having a load that requires a plurality of different types of AC power as inputs.

The heat absorber is not limited to the above embodiment, and may not necessarily have a plate shape and may be constituted by, for example, a fan or a cooling member. However, in order to make effective use of the power generated by the solar cell, it is preferable to use a heat pipe as in the above embodiment. Further, the stand may be made of a known material having good heat conduction such as aluminum or its alloy so as to act as a heat sink.

[0029]

As described above, according to the solar cell device of the present invention, the control means for controlling the electric power generated by the solar cell, the storage battery for accumulating the generated electric power, and the output terminal portion are integrally provided. It is possible to supply electric power to various loads very easily without any complicated preparation for use in an emergency.

Further, since the flat-shaped heat absorber for absorbing the heat generated from the solar cell, the power conversion means, and the storage battery is provided on the back surface side of the solar cell, it is generated from other members integrally provided with the solar cell. The generated heat can be effectively dissipated, and the adverse effects of the operation of the electronic components forming the power conversion means and the performance deterioration of the storage battery can be prevented as much as possible.

Further, a foldable tilt installation stand that can be stored, for example, is provided on the back side of the solar cell so that the solar cell apparatus can be transported or installed in an inclined position. In addition to improving portability, it is possible to easily realize a solar cell panel having a large supply capacity by connecting the solar cell devices together.

When the stand is housed, a cover body made of an insulating material that completely covers the output terminal for supplying electric power to the load and the connecting terminal for connecting the solar cell devices is mounted on the stand. Since the output terminal is not exposed during transportation of the solar cell device, it will not become inoperable or short-circuited due to moisture or dust adhering to it. It is possible to provide a high solar cell device.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a solar cell device according to the present invention.

FIG. 2 is a diagram showing how the solar cell device according to the present invention is carried.

FIG. 3 is a perspective view showing a solar cell panel configured by connecting solar cell devices according to the present invention.

FIG. 4 is a perspective view showing a back surface side of the solar cell device according to the present invention.

FIG. 5 is a perspective view showing an example of a heat absorber.

FIG. 6 is a schematic partial cross-sectional view showing an example of a human pipe.

FIG. 7 is a schematic partial cross-sectional view showing another example of the human pipe.

FIG. 8 is a schematic block diagram showing a circuit configuration of a solar cell device according to the present invention.

FIG. 9 is a schematic block diagram showing a modification of the solar cell device according to the present invention.

[Explanation of symbols]

 1 ... Solar cell (solar cell module) 2 ... Stand 3 ... Control unit 4 ... Storage battery 5 ... Output terminal part 6 ... Output control means 7 ... Power conversion means 8 ... ..Charging / discharging control means 9 ... AC load 10 ... Commercial power supply 11 ... AC load terminal 12 ... Other solar cell devices of the same configuration 13 ... Connection terminal 14 ... External DC load 15 ・ ・ ・ DC load terminal 16 ・ ・ ・ External storage battery 17 ・ ・ ・ Charging terminal 21 ・ ・ ・ Heat transport means 22 ・ ・ ・ Heat pipe S ・ ・ ・ Solar cell device

Claims (3)

[Claims] 1. A solar cell device integrally provided with a solar cell and power conversion means for converting DC power generated by the solar cell into AC power, the solar cell device being provided on the back side of the solar cell device.
A solar cell device comprising a flat heat absorber that absorbs heat generated from the solar cell and / or the power conversion means. 2. A solar cell device comprising a solar cell and a storage battery for accumulating electric power generated by the solar cell, which is integrated with each other.
A solar cell device, wherein a flat heat absorber that absorbs heat generated from the solar cell and / or the storage battery is disposed on the back side of the solar cell device. 3. The heat absorbing body is formed by arranging a plurality of heat pipes in parallel.
The solar cell device according to.