JPH0946922A - Solar battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with various kinds of load by connecting an AC load terminal where load is to be connected and a coupling terminal where other solar battery device of the same constitution is to be connected in parallel, for the output terminal part of the solar battery device where an output control means and a conversion means are provided integrally. SOLUTION: When insulation increases, DC power of fixed voltage is supplied to an conversion means 7 and a charging and discharging control means 8 through an output control means 6. In the conversion means 7, it is converted into specified AC power, and it is supplied to external AC load 9 through the AC load terminal 11 within the output terminal 5. Since the conversion means 7 is provided with a plurality of coupling terminals 13, a large quantity of power can be supplied from the AC load terminal 11, connecting other solar battery device of the same constitution to the coupling terminal 13. Furthermore, the generated power supplied from the solar battery 1 is supplied to the storage battery 4 through a charging and discharging means 8. Since the storage battery 4 can be charged from an external power source through the charging terminal 17, the power can be supplied to the external AC load 9 through the conversion means 7 from the storage battery 4.

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.

It is known that 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, but such a configuration alone does not provide a commercial power source. In places where the surroundings are dark, such as at night, not only does it not have the capacity to use power, but there is no means to control the operating point of the solar cell, so the power generation efficiency may drop significantly. It wasn't practical.

Therefore, an object of the present invention is to provide a epoch-making solar cell device which can deal with various loads without requiring complicated preparations for use and is not limited to emergency use.

[0006]

In order to solve the above-mentioned problems, a solar cell device of the present invention comprises a solar cell, an output control means for controlling the operating point of the solar cell, and a direct current from the output control means. A solar cell device comprising a conversion means for converting an output into an alternating current and an output terminal portion from which the alternating current output from the conversion means is provided, wherein the output terminal portion is an alternating current to which a load is connected. It is characterized in that a load terminal and a connecting terminal to which another solar cell device having the same structure is connected are connected in parallel.

The solar cell, the output control means for controlling the operating point of the solar cell, the conversion means for converting the direct current output from the output control means into the alternating current, the output control means and the conversion means. A charging / discharging control means connected between the charging / discharging control means for preventing overcharging and overdischarging, an AC output terminal portion for deriving an AC output from the converting means, and a DC output for deriving a DC output from the charging / discharging control means. The terminal portion may be integrally provided. Further, in such a solar cell device, the DC output terminal portion may be formed by connecting a charging terminal to which an external storage battery is connected and a DC load terminal to which a load is connected in parallel.

Further, the storage battery is likely to use a 12V system in view of the specifications of the DC load, but a so-called step-up type maximum output point tracking means (M
If PPT) is used, the number of series can be reduced.

Further, a terminal for charging / discharging the external storage battery may be integrally provided.

Further, the storage battery may be provided in an integral and removable structure.

Further, an AC / AC converting means may be provided between the converting means and the AC output terminal so that different kinds of AC outputs can be supplied.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described in detail. As shown in FIG. 1, the light receiving side of the solar cell device S is a solar cell module in which solar cell elements made of polycrystalline silicon are connected in series and / or in parallel (hereinafter referred to as a solar cell).
1 is provided, a foldable aluminum self-standing stand 2 is provided on the back surface side of the solar cell 1 so as to be foldable, and the light receiving surface 1a of the solar cell 1 can be oriented at an optimum angle with respect to the sun rays. Thus, it can be tilted at any angle. 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 self-standing stand 2 is folded on the back surface side 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 self-standing stand 2 folded.

On the back surface side 1b of the solar cell 1, as shown in FIG.
As shown in, output control means for controlling the operating point of the solar cell 1 described later, conversion means for converting the DC output from the output control means into AC, and output described below for deriving the output from the conversion means. A control unit 3 integrally provided with a terminal portion 5 and the like, a thin storage battery 4 such as Ni-Cd, Ni-Mn, and a lithium-ion storage battery are provided.

Further, in the space K, for example, a liquid crystal screen, a flashlight, a transceiver pack, for viewing emergency news, etc.
Expert packs such as ship beacon packs, TV station battery charging packs, AA Ni-Cd storage battery charging packs, electric water purifier packs, and fluorescent light packs can be inserted.

Next, the circuit configuration of the solar cell device S will be described. As shown in FIG. 5, 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. The conversion means 7 for converting into alternating current is connected. Between the output control means 6 and the conversion means 7,
The storage battery 4 is connected 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.

Then, the conversion means 7 and the charge / discharge control means 8
An output terminal portion 5 is connected to each of the. Here, an AC output terminal portion is connected to the converting means 7,
An AC load terminal 11 for connecting to an external AC load 9 or a commercial power source 10 and a connecting terminal 13 for connecting to another solar cell device 12 having the same structure to increase the supply capacity are provided. A plurality of connecting terminals 13 may be provided,
When another solar cell device is connected to this connection terminal, it is possible to autonomously control the frequency of the AC output of the conversion means or to synchronize with the AC output of the conversion means of the other solar cell device. I have to.

Further, the charge / discharge control means 8 is provided with a DC output terminal portion, which charges a DC load terminal 15 for connecting to an external DC load 14 and an 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.

Next, the operation of the solar cell device S will be described. When the illuminance increases during the daytime, the DC power having a constant voltage is supplied to the conversion means 7 and the charge / discharge control means 8 via the output control means 6. The conversion 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 conversion means 7
The cycle of the commercial power source 10 is measured and the AC output is automatically synchronized.

Further, the converting means 7 has a plurality of connecting terminals 13.
Is provided, it is possible, for example, to connect another solar cell device having the same configuration to the connecting terminal 13 so that a large amount of electric power can be supplied from the AC load terminal 11.

Further, the power generated from the solar cell 1 is configured to be 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, power can be supplied from the storage battery 4 to the external AC load 9 through the conversion means 7 even in a dark environment such as at night.

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

In a conventional commercial power supply reverse power 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 a solar cell. I was doing.

Therefore, it is indispensable to develop a special device such as an inverter for converting DC 150V into three-phase AC 200V. Since each DC / AC conversion means is connected to a solar cell, a maximum output point tracking device, etc. It was necessary to incorporate the control circuit of each into 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.

Here, the conversion means 7 is a direct current / single-phase alternating current 10
In the case of the 0V conversion means, the conversion means 7 is configured to allow reverse flow to the commercial power supply 10 of single-phase AC 100V, and the conversion means 7 has a single-phase AC 100V load 18,
19 is connectable, and three-phase AC 200V is supplied via the single-phase AC 100V / three-phase AC 200V conversion means 20.
It can also be connected to the load 21. Reference numeral 22 is a three-phase AC 200V power source.

With this configuration, it can be applied to a solar power generation system having a load that requires a plurality of different types of AC power as inputs.

[0027]

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, the portability of such a solar cell device can be improved, and a solar cell panel having a large supply capacity can be easily realized by connecting the solar cell devices together.

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

FIG. 6 is a schematic block diagram showing a modified example of the solar cell device according to the present invention.

[Explanation of symbols]

 1 ... Solar cell (solar cell module) 2 ... Self-standing stand 3 ... Control unit 4 ... Storage battery 5 ... Output terminal part 6 ... Output control means 7 ... 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 S ・ ・ ・ Solar cell device

Claims (3)

[Claims] 1. A solar cell, an output control means for controlling an operating point of the solar cell, a conversion means for converting a DC output from the output control means into an AC, and an AC output from the conversion means. A solar cell device integrally provided with an output terminal unit, wherein the output terminal unit includes an AC load terminal to which a load is connected and a connection terminal to which another solar cell device having the same configuration is connected in parallel. A solar cell device, which is connected and formed. 2. A solar cell, an output control means for controlling an operating point of the solar cell, a conversion means for converting a direct current output from the output control means into an alternating current, the output control means and the conversion means. A charging / discharging control means connected between the charging / discharging control means for preventing overcharging and overdischarging, an AC output terminal portion for deriving an AC output from the converting means, and a DC output for deriving a DC output from the charging / discharging control means. A solar cell device that is integrally provided with a terminal portion. 3. The direct current output terminal portion is formed by connecting a charging terminal to which an external storage battery is connected and a direct current load terminal to which a load is connected in parallel. Solar cell device.