JPS5996833A - Solar battery system - 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 (a) 1 Technical Field of the Invention Relating to a solar cell system, in particular, when the charging power of the storage battery of the solar cell system decreases, the surface of the solar cell is automatically cleaned to increase the power generation capacity. , relates to a method for increasing system capacity isometrically.

(b), Prior Art and Problems Systems in which wireless communication devices are powered by solar battery systems are usually installed in remote and inconvenient locations where electricity cannot be obtained, and are operated with maintenance visits around once a year. There are many things. In such cases, bird droppings, tree leaves, dust, etc. often adhere to the surface of the solar cell itself, reducing the power generation efficiency of the solar cell itself. In such a case, there is a drawback that the charging power of the storage battery is insufficient for illumination planting to irradiate the light-receiving surface of the solar cell at night with the planned amount of light, resulting in a system failure.

(C)8 Object of the Invention The present invention is to provide a solar cell system that eliminates the above-mentioned drawbacks of the conventional system and ensures good operation.

(d) 1 Structure of the Invention According to the present invention, in a power supply system using a solar cell, the charging voltage of a storage battery is compared with a reference voltage, and the charging voltage becomes equal to or lower than the reference voltage value. a charging voltage detector for detecting a charging voltage detector; A solar cell equipped with a tester that tests the amount of power generated by the light-receiving surface of the battery and issues a signal when the amount of power generation falls below a reference value, and a cleaning means that cleans the light-receiving surface of the solar cell using the output signal of the tester. This is achieved by providing a battery system. The cleaning means may include a wiper or a solar cell that causes water or a cleaning liquid to flow out onto the light-receiving surface of the solar cell and reciprocates in the flowing direction and the opposite direction by an electric mechanism to clean the light-receiving surface of the solar cell. It can be constructed by a mechanism that uses an electric mechanism to remove a transparent film that is previously pasted on the light-receiving surface of the battery.

(e) 9 Embodiments of the Invention Figure 1 shows an embodiment of the present invention, in which 1 is the light-receiving surface of a solar cell, 2 is a wiper, 3 is a water tank for water or cleaning liquid, 4 is a valve, Reference numeral 5 designates a drainage member having a large number of nozzles through which water or cleaning liquid flows out, 6 a control panel, 7 a storage battery, 8 a power load such as a wireless communication device, and 9 a lighting device.

FIG. 2 is a graph for explaining the relationship between the amount of charge of the storage battery and the charging voltage of the storage battery, where the horizontal axis is the amount of charge of the storage battery and the vertical axis is the charging voltage of the storage battery.

As shown in FIG. 2, it is well known that the output voltage of a storage battery generally changes depending on the degree of charge.

Therefore, if charging is insufficient for some reason, the charging voltage will drop, so this charging voltage is constantly monitored, and when the charging voltage drops below the reference value Es, the light-receiving surface 1 of the solar cell is automatically adjusted. It is intended to be thoroughly cleaned.

The present invention will be explained in detail below with reference to FIG.

Under normal conditions, sunlight illuminates the light-receiving surface 1 of the solar cell, and as a result, the solar cell generates electricity, charging the storage battery 7 and supplying electricity to the load 8 . If there is sufficient sunlight, the storage battery 7 can be operated at a charge level of 80% or more as shown in Figure 2, but due to the influence of the environment in which it is used, for example, bird droppings, leaves, sand, etc. etc. adhere to the surface of the solar cell itself and reduce the power generation efficiency of the solar cell itself. Since the load always consumes power, the amount of charge in the storage battery gradually decreases and the charging voltage decreases. The charging voltage detector housed in the control panel 6 constantly monitors the charging voltage, and when the charging voltage drops below the reference value Es, the illuminator 9 is turned on at night and the light-receiving surface 1 of the solar cell is turned on. irradiate, inspect the power generation amount of the solar cells at this time, and if this value is less than the standard value, the control panel 6
The inspection device housed in outputs a signal, opens the valve 4, and the water or cleaning liquid stored in the water tank 3 flows out from the nozzle of the drainage member 5. In this way, the light-receiving surface of the solar cell
can be cleaned automatically. After the water or washing liquid has flowed for a certain period of time, the pulp 4 automatically closes again. As explained above, according to the present invention, it is possible to automatically clean the light-receiving surface 1 of a solar cell to improve the power generation efficiency of the solar cell. In addition, in the present invention, the water or cleaning liquid is drained from the drainage member 5.
In addition to the method of outflowing from the nozzle, the electric motor attached to the wiper 2 is driven by the control panel 6 to move the wiper 2 up and down along the surface of the light-receiving surface 1 of the solar cell as shown by the arrows in Figure 1. By doing so, the surface of the light-receiving surface 1 of the solar cell can be further cleaned and the cleaning effect can be improved.

It is also possible to drive an electric mechanism using a signal output from the inspection device to remove the transparent film previously pasted on the light-receiving surface 1 of the solar cell.

(f) 0 Effects of the Invention As described in detail above, the present invention has the great effect of preventing the power generation efficiency of the solar cell from decreasing due to the light-receiving surface of the solar cell becoming dirty due to the environment.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, in which 1 is a light-receiving surface of a solar cell, 2 is a wiper, 3 is a reservoir for water or cleaning liquid, 4 is a valve, and 5 is a drain for water or cleaning liquid. A drainage member having a large number of nozzles, 6 a control panel, 7 a storage battery, 8 a load, and 9 a lighting device. FIG. 2 is a graph for explaining the present invention in detail, in which the horizontal axis represents the amount of charge of the storage battery, and the vertical axis represents the charging voltage of the storage battery. # / Figure 2 1Q

Claims (1)

[Claims] 1. In a power supply system using a solar cell, a charging voltage detector that compares the charging voltage of a storage battery with a reference voltage and detects when the charging voltage has fallen below the reference voltage value. and an illuminator that is driven by the output signal of the charging voltage detector and irradiates the light-receiving surface of the solar cell with a constant amount of light at night, and inspects the amount of power generated by the light-receiving surface of the solar cell illuminated by the illuminator. A solar cell system comprising: a tester that issues a signal when the power generation amount falls below a reference value; and a cleaning device that cleans the light-receiving surface of the solar cell using the output signal of the tester. . 23. The cleaning means has a wiper that causes water or cleaning liquid to flow onto the light-receiving surface of the solar cell, and that moves reciprocally in one direction and the opposite direction by an electric mechanism to clean the light-receiving surface of the solar cell. A solar cell system according to claim 1, characterized in that: 3. The cleaning means comprises a mechanism that cleans the light-receiving surface of the solar cell by removing a transparent film that has been pasted on the light-receiving surface of the solar cell using an electric mechanism. The solar cell system according to item 1.