JP2007281319A - Solar battery power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily find a solar cell which is broken or the like by a low-cost and simple circuit configuration. <P>SOLUTION: Light-emitting diodes 12a and 12b which play a role similar to bypass diodes are connected as a parallel circuit with solar cells 11a-11c and 11d-11f. Also, a series circuit of a relay contact 13 and a load 14 and a series circuit of a relay contact 15 and a power supply 16 are connected in parallel with the solar cells 11a-11f. When the solar cells 11a-11f are irradiated with sunlight, electric power is generated by the solar cells 11a-11f. If the relay contact 13 is closed, the obtained electric power is consumed by the load 15. When the solar cell 11a is broken and disconnection occurs, current by the electrical power generated by the solar cells 11d-11f passes through the light-emitting diode 12a. The light-emitting diode 12a emits light and shows that there are anomalies in the solar cells 11a-11c. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a solar cell power generator that generates electrical energy from sunlight.

  Systems that are used for various purposes using power generated by solar cells have been developed. For example, electricity is stored in a battery during the day when sunlight is sufficiently obtained, and at night when sunlight is not obtained, the stored electric energy is used for display, illumination, etc., thereby effectively using electric energy. be able to.

  In a solar power generation apparatus, it is very common to arrange a bypass diode for current bypass for each solar battery cell. For example, in Patent Document 1, as shown in FIG. 5, backflow prevention diodes 4a, 4b, and 4c are connected to each of the plurality of solar cells 2a, 2b, and 2c. These backflow prevention diodes 4a to 4c are such that the solar cells 2a to 2c fail, or the solar cells 2a to 2c are shielded from light by the shade of trees, snow, etc., and the generated voltage decreases, so that the solar cells 2a It is used as a countermeasure when the electrical resistance of ˜2c is increased.

  As described above, by installing the backflow prevention diodes 4a to 4c, it is possible to bypass the solar cells 2a to 2c having increased electric resistance as described above to easily flow current, and the solar cells 2a to 2c. Overall power reduction and damage can be prevented.

  Further, in Patent Document 1, the abnormal state of the solar cells 2a to 2c is detected, and the light emitting diodes 6a, 6b, and 6c connected in parallel with the backflow preventing diodes 4a to 4c are caused to emit light, thereby identifying the abnormal part. It is trying to display.

JP-A-2005-44824

  However, in Patent Document 1, the backflow preventing diodes 4a to 4c and the light emitting diodes 6a to 6c are separately provided, which causes a problem that the circuit becomes complicated and the cost is increased.

  An object of the present invention is to provide a solar battery power generation apparatus that solves the above problems, has a simple circuit configuration at a low cost, and can easily detect a solar battery cell in which a failure or the like has occurred.

  In order to achieve the above object, the technical features of the solar battery power generation apparatus according to the present invention include a solar battery cell that converts sunlight energy into electrical energy, and a bypass that is connected in parallel for each of the one or more solar battery cells. In the solar battery power generation device including a diode, a light emitting diode is used as the bypass diode.

  According to the solar battery power generation device of the present invention, by combining the light-emitting diode with the bypass diode, the safety of the circuit can be ensured and the failure location can be easily identified, thereby realizing a low-cost and simple circuit configuration. .

  FIG. 1 is a schematic circuit diagram of an embodiment, in which solar cells 11a to 11f are connected in series, and the light emission that performs the same current blocking function as a bypass diode with respect to the solar cells 11a to 11c and 11d to 11f. Diodes 12a and 12b are connected as a parallel circuit. Moreover, the series circuit of the relay contact 13 containing the semiconductor switch and the load 14 is connected in parallel with respect to the photovoltaic cells 11a-11f. Further, a series circuit of the relay contact 15 and the power source 16 is similarly connected in parallel to the solar cells 11a to 11f.

  When the solar cells 11a to 11f are irradiated with sunlight, power is generated in the solar cells 11a to 11f. If the relay contact 13 is closed, a current due to the generated power flows as shown by the arrow in FIG. The load 14 may be an electric device such as an electric lamp, or may be a power storage battery, a capacitor, or a power conditioner for grid connection to an electric power company.

  By using these light emitting diodes 12a and 12b, it is possible to have the same function as the backflow preventing diodes 4a to 4c described in the conventional example. In addition, the light emitting diodes 12a and 12b can be substituted without separately providing the light emitting diodes 6a to 6c for failure display, which are conventionally provided as necessary. However, the light emitting diodes 12a and 12b need to have a capacity equivalent to that of the conventional backflow prevention diodes 4a to 4c. If the capacity is insufficient, a plurality of light emitting diodes may be arranged in parallel to increase the capacity.

  Here, for example, when the solar battery cell 11a fails and a disconnection occurs, the power generated in the solar battery cells 11d to 11f flows as a current as shown by the arrows in FIG. 3, and the light emitting diode 12a is caused by the current flowing through the light emitting diode 12a. Emits light, indicating that the solar cells 11a to 11c are abnormal.

  Thus, failure of the solar cells 11a to 11f can be easily specified by using the light emitting diodes 12a and 12b as bypass diodes. That is, when the light emitting diode 12a is lit even though the solar cells 11a to 11f are sufficiently irradiated with sunlight, the light emitting diode 12a bypasses the solar cells 11a to 11c. Current is flowing. That is, the abnormality of the specific solar cells 11a to 11c connected in parallel to the light-emitting diode 12a that is lit is displayed.

  Further, at night or the like, the light emitting diodes 12a and 12b can be used as illumination. That is, as shown in FIG. 4, the relay contact 13 is opened and the relay contact 15 is closed, so that the current supplied from the DC or AC power supply 16 can be supplied to the light emitting diodes 12a and 12b to emit light. In this case, since the solar cells 11a to 11f not irradiated with sunlight have high resistance, it is possible to energize only the light emitting diodes 12a and 12b. Or although illustration is abbreviate | omitted, you may energize using the battery which stored the electric power generation energy in the daytime. In the case of a cell that does not have high resistance when it is not irradiated with sunlight, it is necessary to block it at night by a switch connected in series to the solar cells 11a to 11f.

  In this way, by switching the relay contacts 13 and 15 between energization of the load 14 and lighting, for example, power can be stored in the daytime when sufficient sunlight is obtained, and at night when sunlight cannot be obtained and power cannot be stored. Makes it possible to cause the light emitting diodes 12a and 12b to emit light by using commercial power supply or stored electrical energy. In this case, by increasing the number of the light emitting diodes 12a and 12b and arranging them according to a predetermined pattern, it is possible to display the light as a sign or decoration. This increase in the number of light emitting diodes may simply add a light emitting diode for illumination that does not function as a bypass diode.

  Further, the light emitting diodes 12a and 12b can be used by extending the wiring to a place different from the solar cells 11a to 11f, for example, indoors. Alternatively, when the solar cells 11a to 11f are attached to a window glass or the like, the light emitting diodes 12a and 12b can be arranged on the back side of the solar cells 11a to 11f to emit light toward the room at night.

  In addition, FIG. 1 is a schematic circuit diagram to the last, and one light emitting diode 12 is installed for every three solar cells 11, but the present invention is not limited to this example. .

  Furthermore, the use of a large number of solar cells 11 and light-emitting diodes 12 is suitable for electric display of signs and decorations.

It is a typical circuit block diagram of an Example. It is explanatory drawing in the case of accumulating electric power generation energy with a photovoltaic cell. It is explanatory drawing when a photovoltaic cell fails and a light emitting diode light-emits. It is explanatory drawing in the case of making a light emitting diode light-emit with a power supply. It is a circuit block diagram of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Solar cell 12 Light emitting diode 13, 15 Relay contact 14 Load 16 Power supply

Claims (3)

  In a solar battery power generation apparatus including a solar battery cell that converts solar energy into electric energy and a bypass diode connected in parallel for each of the solar battery cells or a plurality of solar battery cells, a light emitting diode is used as the bypass diode. A solar cell power generator characterized by the above.   The solar battery power generation apparatus according to claim 1, wherein electrical energy obtained by the solar battery cell is stored.   3. The solar cell power generator according to claim 2, wherein the light emitting diode is turned on using the stored electrical energy or a commercial power source.

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