JPS62100142A - Source circuit for solar battery applied equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a power supply circuit for solar cell application equipment such as wireless chimes and wireless intercoms.

[Background technology 1] Some wireless chimes and wireless interbon generators use dry batteries, but there is a problem that family members do not notice when the batteries run out and stop working. Therefore, in order to eliminate maintenance such as replacing batteries after installation, some devices are available that use solar cells as a power source. However, since the amount of power generated is proportional to the amount of sunlight, when determining the size of the solar cell, it is assumed that it can be used even in extremely low amounts of sunlight, such as during the winter in snowy countries, so it is necessary to consider the relatively low power consumption of devices such as wireless intercoms. In order to operate a large circuit, it is necessary to use an unrealistically large solar cell, which poses a problem in that the quality is wasted in most usage environments.

[Objective of the Invention] The present invention was made in direct view of the above-mentioned problems, and its purpose is to enable use without maintenance even in places with poor sunlight conditions, and yet to be usable in places with moderately good sunlight conditions. It is an object of the present invention to provide a power supply circuit for a solar cell application device which can sufficiently drive a load circuit using a small capacity and low cost solar cell in such a case.

DISCLOSURE OF THE INVENTION The present invention comprises a solar cell, a secondary battery which is charged with the output of the solar cell via a backflow prevention diode, and a first & A load circuit is provided in the main body of the device, and a first power supply switching diode is connected to the load circuit through a second power supply switching diode.
A secondary battery is installed in the main body of the device so that it can be replaced, the rated voltage of the primary battery is higher than the circuit operating voltage, and the rated voltage of the secondary battery is set to 1.
It is characterized by being set higher than the next generation battery.

This will be explained below using examples.

In this embodiment, as shown in Figure @1, solar cell 1 and Ni
A power supply circuit is composed of a secondary battery 2 such as a CD battery and a primary battery 3 with low self-discharge such as a lithium battery, and the solar battery 1 is connected to the secondary battery 2 via a backflow prevention diode 4. To! As shown in FIG. 2, for example, in the case of a wireless intercom, a mist film is formed over the entire surface of the main body 5 of the device so that it can receive sunlight. The secondary battery 2 is connected to a load circuit 8 via a power switching diode 6, and the primary battery 3 is connected to a load circuit 8 via a power switching diode 7. Here, the secondary battery 2 is installed inside the device main body 5, and the primary battery 3 is replaceably stored in a battery storage part 9 opened on the side of the device main body 5, and can be attached as necessary. . Here, the rated voltage of the secondary battery 2 is higher than the rated voltage of the primary battery 3, and
The rated voltage of is set higher than the operating voltage of the load circuit 8.

The battery compartment 9 is covered with a cover 10 as shown in FIG. 3(a).
The opening is closed, and when replacing or installing the battery, the cover 10 is removed as shown in FIG. 3(b) and the primary battery 3 is replaced or installed.

Therefore, the voltage applied to the load circuit 8 with the primary battery 3 attached is as follows. That is, in a state without sunlight, the voltage of the already charged secondary battery 2 is applied, and as the discharge time passes, the voltage decreases as shown in FIG. 4A. If this voltage drops below the voltage of the primary battery 3, the voltage port of the primary battery 3 will be applied to the load circuit 8. When there is sunlight, the voltage of the secondary battery 2 is charged by the solar battery 1 and increases, and eventually exceeds the voltage of the primary battery 3. Then, the voltage of the secondary battery 2 is applied to the load circuit 8 again (c). In this case, during the period of sunshine, the secondary battery 2 is replaced by the solar battery 1.
The battery is charged and the voltage rises to the rated voltage. Next, when night comes and there is no sunlight again, the secondary battery 2 is discharged. Thereafter, the above-described operation will be repeated.

By the way, this is the season with good conditions where you can get 111% of the sunlight.
If the location is suitable, the solar cell 1 and the secondary battery 2 can sufficiently drive the load circuit 8, and in this case, the primary battery 3 is not necessary.

[Effects of the Invention] The present invention provides a solar cell, a secondary battery that is charged with the output of the solar cell via a backflow prevention diode, and a secondary i-cell! A load circuit connected via the switching diode @1 is provided in the main body of the device, and a second
A primary battery connected via a switching diode is installed in the main body of the device so that it can be replaced, the rated voltage of the primary battery is higher than the circuit operating voltage, and the rated voltage of the secondary battery is set higher than the primary battery. Therefore, the secondary and primary batteries can ensure reliable operation of the load circuit even when there is no sunlight for many days, such as in the winter in snowy countries, and even when used in places with poor sunlight conditions, By using batteries, secondary batteries, and primary batteries, it is possible to use the equipment almost maintenance-free, and in places with good sunlight conditions, the equipment can be completely maintained without using primary batteries. It has the effect of being easy to use and inexpensive, and since the primary battery is replaceable, small and low capacity solar cells can be used, and when used in combination with the primary battery, the capacity of the solar cell is also small. This has the effect that the overall size can be reduced, and the device itself can also be made smaller.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a perspective view of the main body of the same device, Figs. 3 (a) and (b) are explanatory views of the same as above,
FIG. 4 is an explanatory diagram of the same operation as above, where 1 is a solar cell, 2 is a secondary battery, 3 is a primary battery, 4 is a backflow prevention diode,
5 is the main body of the device, and 6 and 7 are power supply switching diodes. Agent Patent attorney Ishi 1) Chief 7 Figure 1 Figure 2 (0) (b) Figure 4 BFJQL S fraud〃j B1 1 savings 1 q9'1 1 procedural amendment (voluntary) 1. Indication of the case 1985 Patent Application No. 239934 2, Name of the invention, Power supply circuit for solar battery applied equipment 3, Relationship with the case of the person making the amendment Patent applicant address: 1048 Kadoma, Kadoma City, Osaka Prefecture Name (58
3) Matsushita Electric Works Co., Ltd. Representative Sadao Fujii 4, Agent postal code 530 5, Date of amendment order 6, Number of inventions increased by amendment None 7, Subject of amendment [11 Specification No. 4TX of the present application] Correct "Full surface" in the first line to "Front".

Claims (1)

[Claims] (1) A device that connects a solar cell, a secondary battery charged with the output of the solar cell via a backflow prevention diode, and a load circuit connected to the secondary battery via a first switching diode. A replaceable primary battery is installed in the main unit and connected to the load circuit via a second switching diode, and the rated voltage of the primary battery is higher than the circuit operating voltage. A power supply circuit for solar battery application equipment, characterized in that the rated voltage of the battery is set higher than that of a primary battery.