CN204407342U - solar module - Google Patents

Abstract

A solar module comprises a first plate located on a light receiving side, a second plate spaced from the first plate and located on a backlight side, a solar cell unit arranged between the first plate and the second plate, a packaging material located between the first plate and the second plate and wrapping the solar cell unit, and a semi-transparent semi-reflective film arranged between the second plate and the solar cell unit. The transflective film can reflect light with a wavelength of 400-1100 nm toward the solar cell unit, so as to improve the light absorption rate of the light with the wavelength and improve the photoelectric conversion efficiency. In addition, the semi-transparent and semi-reflective film can also allow ultraviolet light and infrared light to penetrate through so as to avoid the problem that the working temperature of the solar module is too high to reduce the photoelectric conversion efficiency due to the accumulation of heat energy.

Description

solar module

technical field

The utility model relates to a battery module, in particular to a solar module for converting light energy into electric energy.

Background technique

Existing solar modules usually include two plates spaced up and down, several solar cells electrically connected to each other and arranged between the plates, and a solar cell disposed between the plates and wrapped around the solar cells. surrounding packaging material.

When the aforementioned solar cell is used, the light entering the solar module includes light in the wavelength range (400-1100 nm) that can be used for power generation, as well as ultraviolet light and infrared light.

When the light enters the solar module and passes through the encapsulation material and the solar cell, the solar cell usually cannot completely absorb the aforementioned light with a wavelength of 400-1100 nm. In other words, when light enters the solar module, part of the light with a wavelength of 400-1100nm can be absorbed by the solar cell and converted into electrical energy for use, but there is still part of the light with a wavelength of 400-1100nm Not absorbed yet. It can be seen that the light absorption rate of the existing solar modules to light with a wavelength of 400-1100 nm is still low, and the photoelectric conversion efficiency is not high.

In addition, among the light entering the solar module, ultraviolet light will deteriorate the encapsulation material and reduce the service life of the solar module, and when the ultraviolet light and infrared light are accumulated in the solar module, there It will cause the working temperature of the solar module to be too high, and then cause the photoelectric conversion efficiency of the solar cell to decrease.

Contents of the invention

The purpose of the utility model is to provide a solar module, which can avoid the problem of excessively high working temperature caused by accumulated heat energy, thereby improving the photoelectric conversion efficiency.

The solar module of the utility model includes: a first plate on the light-receiving side, a second plate spaced from the first plate and on the backlight side, and a solar panel arranged between the first plate and the second plate. A battery unit, and an encapsulation material located between the first board and the second board and covering the solar battery unit. The solar module also includes a semi-transparent and semi-reflective film arranged between the second plate and the solar cell unit, the semi-transparent and semi-reflective film can allow ultraviolet light and infrared light to pass through, and can transmit light with a wavelength of 400~ Light at 1100 nm is reflected towards the solar cell.

In the solar module of the present invention, the semi-transparent and semi-reflective film is arranged between the second board and the packaging material.

The beneficial effect of the utility model lies in that the semi-transparent and semi-reflective film can reflect the light with a wavelength of 400-1100nm toward the solar battery unit, which can improve the light absorption of the solar battery unit to the light with a wavelength of 400-1100nm rate to increase the photoelectric conversion efficiency. In addition, the semi-transparent and semi-reflective film can also allow ultraviolet light and infrared light to pass through and emit outwards through the second plate, thereby avoiding the problem of excessively high operating temperature of the solar module caused by accumulated heat energy and reducing the photoelectric conversion efficiency, thereby The photoelectric conversion efficiency can be improved.

Description of drawings

Fig. 1 is an incomplete side sectional schematic diagram illustrating the structure of an embodiment of the solar module of the present invention.

Detailed ways

The utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that in the following description, similar elements are denoted by the same numbers.

Referring to Fig. 1, an embodiment of the solar module of the present invention includes: a first plate 1 and a second plate 2 arranged at intervals, and a solar panel arranged between the first plate 1 and the second plate 2 A battery unit 4 , a packaging material 3 and a semi-transparent and semi-reflective film 5 .

The first board 1 is a light-transmitting board and is located on the light-receiving side. The light-receiving side refers to the side where the solar module mainly receives light irradiation when in use. The material of the first board 1 can specifically be glass, polycarbonate (PC) or polymethyl methacrylate (PMMA).

The second plate 2 is located on the backlight side, and the backlight side refers to the side of the solar module facing away from light when in use. The material of the second plate 2 can specifically be glass or polyethylene terephthalate (PET). The second plate 2 can be light-transmissive or impermeable to light with a wavelength of 400-1100nm but can transmit ultraviolet rays. There are no particular limitations on the light and infrared light plates.

The solar cell unit 4 includes several solar cells 41 arranged in an array between the first plate 1 and the second plate 2, and several soldering strips electrically connected between the solar cells 41 (not shown in the figure). Show). The type of the solar cell 41 does not need to be limited as long as the solar cell 41 can convert light energy into electrical energy. Since the structure of the solar cell 41 and the bonding relationship between the solar cell 41 and the soldering ribbon are not the focus of the present invention, they will not be described in detail.

The packaging material 3 of this embodiment is located between the first plate 1 and the second plate 2, and wraps around the solar battery unit 4; and the semi-transparent and semi-reflective film 5 is arranged between the second plate 2 and the between the packaging materials 3 . In practice, as long as the semi-transparent and semi-reflective film 5 is arranged between the second sheet material 2 and the solar cell unit 4, the purpose can be achieved. For example, the packaging material 3 can also be coated on the solar cell unit 4 and the solar cell unit around the transflective membrane 5 .

The material of the packaging material 3 can specifically be ethylene-vinyl acetate copolymer (EVA), etc., but not limited to the aforementioned examples.

The semi-transparent and semi-reflective film 5 specifically uses the optical film of Cool Mirror Film 330 of 3M Company, the semi-transparent and semi-reflective film 5 can allow ultraviolet light and infrared light to penetrate, and can reflect light with a wavelength of 400-1100nm.

In use of this embodiment, the light will pass through the first plate 1 and enter the solar module, and pass through the encapsulation material 3 and the solar battery unit 4. At this time, the solar battery 41 of the solar battery unit 4 will be Most of the light with a wavelength of 400-1100nm is absorbed and converted into electrical energy for use, and the unabsorbed light with a wavelength of 400-1100nm will continue to move toward the semi-transparent and semi-reflective film 5 together with ultraviolet light and infrared light.

Through the characteristic that the semi-transparent and semi-reflective film 5 can reflect light with a wavelength of 400-1100nm, the light with a wavelength of 400-1100nm that has not been absorbed can be reflected toward the solar cell 41, and the wavelength that has not been absorbed can be increased by 400-1100nm light reflection, refraction path and scattering effect, thereby increasing the opportunity for the solar cell 41 to absorb the aforementioned unabsorbed light with a wavelength of 400-1100nm, thereby improving the performance of the solar cell 41 on the wavelength of 400-1100nm The light absorption rate of light can effectively improve the photoelectric conversion efficiency.

At the same time, the semi-transparent and semi-reflective film 5 can also allow ultraviolet light and infrared light to pass through, so that ultraviolet light and infrared light can be emitted through the second board 2 without being accumulated in the first board 1 and the first board 1 . Between the second sheet 2. In this way, too much heat energy will not be accumulated in the solar module, thereby indeed avoiding the problem that the photoelectric conversion efficiency of the solar cell 41 is reduced due to the high working temperature of the solar module.

Claims (2)

1. a solar modules, comprise: first sheet material at sensitive side, one and this first sheet material interval and at the second sheet material of backlight side, a solar battery cell be arranged between this first sheet material and this second sheet material, and one between this first sheet material and this second sheet material and the encapsulation material of this solar battery cell coated; It is characterized in that: this solar modules also comprises a semi-transparent semi-reflecting film be arranged between this second sheet material and this solar battery cell, this semi-transparent semi-reflecting film can allow ultraviolet light and infrared light penetrate, and can be that the light of 400 ~ 1100nm reflects towards this solar battery cell by wavelength.

2. solar modules according to claim 1, is characterized in that: this semi-transparent semi-reflecting film is arranged between this second sheet material and this encapsulation material.