CN202275150U - Solar battery dust monitor device - Google Patents

Abstract

A solar cell dust monitoring device, comprising: a first solar cell panel and a second solar cell panel, both of which are electrically connected to a test circuit, the first solar cell panel is exposed in the external space, the second solar cell panel A dust cover is provided outside the solar panel, the dust cover is closed in the first state, the second solar cell is wrapped in the airtight space formed by the dust cover, the dust cover is opened in the second state, and the second The two solar cells are exposed to the external space. When detection is required, compare the output voltages of the two solar panels. If the difference is too large, it means that the surface of the solar panel exposed to the external space is seriously dusty and needs to be cleaned. The battery products are cleaned of dust to ensure the conversion efficiency of solar battery products.

Description

A solar cell dust monitoring device

technical field

The utility model relates to the application field of solar cells, in particular to a dust monitoring device for solar cells.

Background technique

Photovoltaic cells are devices that use the photovoltaic effect to directly convert light into electrical energy. Because it is widely used to convert solar energy directly into electrical energy, it is also called solar cells and solar photovoltaic cells. At present, silicon photovoltaic cells are the most widely used and most promising. The theoretical value of the conversion efficiency of silicon photovoltaic cells can reach a maximum of 24%, but in fact it only reaches 10% to 18%. However, the efficiency of 10% to 18% may not be fully utilized, because solar cells have an Achilles' heel: dust. There is a prerequisite for the installation of Tianyang solar cells, that is, they must be installed on the outdoor roof in the open air. High altitude or open space, to receive sunlight to the maximum extent, and effectively exert its maximum photoelectric or photothermal conversion performance. In this way, the dust and debris in the atmosphere will adhere to its surface, seriously affecting its photoelectric and photothermal conversion efficiency, and reducing its performance. A small amount (4.5g/m2) of dust can make solar panels Energy conversion rate is reduced by 40%. If ordinary solar panels are not cleaned for three months, the conversion efficiency of solar energy will drop below 9%.

Utility model content

In view of this, the purpose of this utility model is to propose a solar cell dust monitoring device, when the dust on the surface of the solar cell accumulates to a certain extent, it can send a dust removal reminder to the user, and clean the surface of the solar cell in time to keep the solar cell In a state of high conversion rate work.

A solar cell dust monitoring device proposed according to the above purpose, comprising: a first solar cell panel and a second solar cell panel, both of which are electrically connected to a test circuit, and the first solar cell panel is exposed in the external space , the outside of the second solar cell panel is provided with a dust cover, the dust cover is closed in the first state, the second solar cell is wrapped in the airtight space formed by the dust cover, and the dust cover is in the same state as the second state The bottom is opened, and the second solar cell is exposed to the external space.

Optionally, the test circuit includes a first voltage test device, a second voltage test device, a divider, a comparator and an alarm device, the first voltage test device is connected to the first solar panel, and the second The voltage testing device is connected to the second solar panel, the divider is connected to the first voltage testing device and the second voltage testing device, the comparator is connected to the divider, and the alarm device is connected to the on the comparator.

Optionally, the dust cover has a folding structure, and the folding structure is connected to a motor.

Optionally, a timer is also included, connected to the motor.

Below in conjunction with accompanying drawing, the utility model is described in detail with specific embodiment.

Description of drawings

Fig. 1 is a schematic diagram of a solar cell dust monitoring device of the present invention;

Fig. 2 is a schematic structural diagram of the second battery plate of the present invention;

Fig. 3 is a schematic structural diagram of the test circuit of the present invention.

Detailed ways

Please refer to FIG. 1 , which is a schematic diagram of a solar cell dust monitoring device of the present invention. As shown in the figure, the solar cell dust monitoring device 1 includes a first solar cell panel 10 and a second solar cell panel 20 , both of which are electrically connected to a test circuit 30 . The first solar cell panel 10 is a reference panel, which is placed in an external space consistent with the environment of solar cell products, that is, the accumulation of dust on the surface of the first solar cell panel 10 is consistent with the accumulation of solar cell products. In this way, when the conversion efficiency is reduced due to long-term dust accumulation on the surface of the solar cell product, the first solar cell panel 10 will also be affected by the dust and reduce the conversion efficiency.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of the second battery board of the present invention. As shown in the figure, the second solar cell panel 20 is placed in a closed space formed by a dust cover 21 , and the dust cover 21 includes a foldable structure 211 , a placement space 212 and a motor 213 . In the first state, the foldable structure 211 is closed, and the second solar cell panel 20 is wrapped in the airtight space formed by the dust cover 21 . In the second state, the foldable structure 211 is opened under the drive of the motor 213 to expose the second solar panel 20 to the external space. In this way, the second solar battery panel 20 is usually hidden in a closed space and will not be polluted by dust. When needing to carry out the test of dust, open the dust cover 21, expose the second solar panel, because there is the difference of conversion efficiency between the first solar panel 10 and the second solar panel 20 at this moment, the output power of both Naturally it is different.

Further, a timer 214 is connected to the motor 213, and a fixed time is set, such as once a month or once a quarter, so that the solar cell dust monitoring device can automatically open the dust cover and carry out the dust test, which can avoid Multiple openings caused by improper operation reduce the average energy consumption of the monitoring device.

Please refer to FIG. 3 again. FIG. 3 is a schematic structural diagram of the test circuit of the present invention. As shown in the figure, the test circuit 30 includes a first voltage test device 31 , a second voltage test device 32 , a divider 33 , a comparator 34 and an alarm device 35 .

The first voltage testing device 31 is connected to the first solar panel 10 for testing the output voltage of the first solar panel 10 and outputs a first voltage signal to the divider 33 .

The second voltage testing device 32 is connected to the second solar panel 20 for testing the output voltage of the second solar panel 20 and outputs a second voltage signal to the divider 33 .

The divider 33 is connected to the first voltage testing device and the second voltage testing device, receives the above-mentioned first voltage signal and the second voltage signal, and divides the two voltage signals to obtain the first solar panel The ratio of the output voltage of 10 to the output voltage of the second solar panel 20. And output the ratio to the comparator 34 .

The comparator 34 is connected to the divider 33 , accepts the ratio provided by the divider 33 , compares the ratio with a reference value, and outputs the comparison result to the alarm device 35 . The reference value is preset in the comparator 34 .

The alarm device 35 is connected to the comparator to receive the comparison result. When the comparison result is that the ratio is greater than the reference value, it means that the conversion efficiency of the first solar battery panel 10 is still maintained at a relatively high level, and the dust accumulated on the surface is not enough to affect its use, and the alarm device 35 does not send an alarm signal. And when the comparison result is that the ratio is less than the reference value, it means that the dust accumulated on the first solar battery panel 10 has exceeded a certain level, causing the conversion efficiency of the first solar battery panel 10 to be extremely low, that is, the solar battery product also suffers from the same problem. Dust pollution seriously affects the use of the entire solar cell product. At this time, the alarm device 35 sends out an alarm signal, prompting personnel to clean the surface of the solar cell product, remove the dust accumulated on the surface in time, and restore the conversion efficiency of the solar cell product.

To sum up, the utility model proposes a solar cell dust monitoring device. The monitoring device uses two solar cell panels, one is placed in an external space to be polluted by dust, and the other is placed in a closed space. Keep it clean. When detection is required, compare the output voltages of the two solar panels. If the difference is too large, it means that the surface of the solar panel exposed to the external space is seriously dusty and needs to be cleaned. The battery products are cleaned of dust to ensure the conversion efficiency of solar battery products.

From the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present utility model can be described more clearly, and the scope of claims of the present utility model is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and arrangements with equivalents within the scope of the claims of the present utility model.

Claims (4)

1. A solar cell dust monitoring device, characterized in that it comprises: a first solar cell panel and a second solar cell panel, both of which are electrically connected to a test circuit, and the first solar cell panel is exposed in the external space , the outside of the second solar cell panel is provided with a dust cover, the dust cover is closed in the first state, the second solar cell is wrapped in the airtight space formed by the dust cover, and the dust cover is in the same state as the second state The bottom is opened, and the second solar cell is exposed to the external space. 2. The solar cell dust monitoring device as claimed in claim 1, characterized in that: the test circuit comprises a first voltage test device, a second voltage test device, a divider, a comparator and an alarm device, and the first voltage The testing device is connected on the first solar panel, the second voltage testing device is connected on the second solar panel, the divider is connected on the first voltage testing device and the second voltage testing device, and the comparison The divider is connected to the divider, and the alarm device is connected to the comparator. 3. The solar cell dust monitoring device according to claim 1, wherein the dust cover has a folding structure, and the folding structure is connected to a motor. 4. The solar cell dust monitoring device according to claim 3, further comprising a timer connected to the motor.

Images