TWI469371B - Solar cell module - Google Patents

Description

Solar battery module

The invention relates to a solar cell module, in particular to a solar cell module which uses an ion exchange lens for guiding light.

Referring to FIG. 1 , a conventional solar cell module includes a light guide plate 7 and a solar panel 8 . The light guide plate 7 includes a light incident side 71 , and the light incident side 71 has a plurality of outwardly convex faces. The light collecting lens 72 can guide or concentrate the light into the plurality of photoelectric regions 81 of the solar panel 8 by the arrangement of the plurality of collecting lenses 72 to enhance the photoelectric conversion of the plurality of photoelectric regions 81 of the solar panel 8. rate.

However, when the light incident side 71 has the plurality of light collecting lenses 72 protruding outward, the light incident side 71 of the light guide plate 7 forms an uneven surface, and the light incident side 71 of the light guide plate 7 must be When combined with other articles, the friction due to the contact will concentrate on the surface of the plurality of collecting lenses 72, which will increase the possibility of frictional damage in the plurality of collecting lenses 72, and thus affect the The light collecting effect of the light guide plate 7.

As shown in FIG. 2, a plurality of embedding portions 92 are formed on the light incident side 91 of a light guide plate 9 by etching or cutting, and the plurality of collecting lenses 93 are embedded in the embedding portion 92 so that each The arc convex portion of the collecting lens 93 is attached to the surface of the embedding portion 92, and the light incident side 91 of the light guiding plate 9 forms a plane, wherein the light guiding plate 9 and the plurality of collecting lenses 93 are differently selected. The light-transmitting material having a refractive index, after the light enters the collecting lens 93, may be different from the refractive index of the light guiding plate 9 and the collecting lens 93, and the collecting lens 93 may be different. Refraction is generated at the junction with the embedded portion 92 to collect the light.

However, the light collecting lens 93 is embedded in the embedded portion 92, and the light collecting lens 93 and the light guiding plate 9 must be etched or cut, so that the light collecting lens 93 and the embedded portion 92 are attached to each other. It is difficult to completely close the contact, and thus the refractive index change between the collecting lens 93 and the embedded portion 92 is affected, so that the light cannot be accurately refracted to the target direction, resulting in poor light collecting effect of the light guide plate 9.

The main object of the present invention is to provide a solar cell module in which an ion exchange lens uses an electric field strength to drive ion exchange to form a lens, and the lens shape can be easily changed.

Another object of the present invention is to provide a solar cell module in which an ion exchange lens is formed in the glass substrate to prevent the ion exchange lens from being worn and to maintain the light collecting effect of the glass substrate.

In order to achieve the foregoing object, a solar cell module of the present invention comprises: a glass substrate having a light incident plane and a light exiting side, the light exiting side being disposed opposite to the light incident plane, the light incident plane and A light guiding region is formed between the light emitting sides, wherein the light guiding region has a plurality of ion exchange lenses adjacent to the light incident plane, the light guiding region has a light guiding length, a radius length of the ion exchange lens and a guiding portion of the light guiding region The ratio of the light length is 1:7.85 to 1:22.85; and a solar panel having a light receiving side, the light receiving side is coupled to the light emitting side of the glass substrate, and the light receiving side comprises a bearing surface, and the bearing surface is provided with a plurality of electrodes. The center position of each of the electrodes is interchangeable with each of the ions The mirror system is set in a wrong position.

In the solar cell module of the present invention, each of the ion exchange lenses is a columnar structure extending along the light incident plane.

In the solar cell module of the present invention, each of the electrodes has an electrode length.

In the solar cell module of the present invention, the ratio of the radius length of the ion exchange lens to the electrode length of the electrode is 1:0.33 to 1:1.

The above and other objects, features, and advantages of the present invention will become more apparent from the claims. A preferred embodiment of the solar cell module of the present invention comprises: a glass substrate 1 and a solar panel 2, the glass substrate 1 being bonded to the solar panel 2.

The glass substrate 1 has a light incident surface 11 and a light exiting side 12, and the light exiting side 12 is disposed opposite to the light incident surface 11. A light guiding region 13 is formed between the light incident surface 11 and the light exiting side 12, and the light guiding region is formed. There are a plurality of ion exchange lenses 14 in the 13 adjacent to the light entrance plane 11.

The plurality of ion exchange lenses 14 are disposed by attaching a silver film to the glass substrate 1 and applying an electric field to drive silver ions of the silver film and adjacent to the light guiding region 13 of the glass substrate 1. The sodium ions of the light incident plane 11 are ion-exchanged so that the light guiding region 13 of the glass substrate 1 is adjacent to the light incident plane 11 to form a plurality of ion exchange lenses 14 having a higher concentration of silver ions. Due to the plurality of ion exchange lenses 14 and the The silver ion concentration of the light guiding region 13 is different, so the plurality of ion exchange lenses 14 and the light guiding region 13 have different refractive indices of light, and when the light enters the plurality of ion exchange lenses 14, the ion exchange can be performed in several ions. A refraction occurs at the interface between the lens 14 and the light guiding region 13 so that the light passes through the light guiding region 13 and is concentrated on the light exiting side 12. The depth and radius of curvature of the ion exchange lens 14 are controlled by the thickness of the silver film and the driving strength of the electric field, and the shape of the ion exchange lens 14 can be easily changed.

Since the plurality of ion exchange lenses 14 are formed on the light guiding region 13 of the glass substrate 1 by ion exchange, and the light incident plane 11 does not change the surface shape due to the ion exchange technique, the light incident plane 11 does not There is a protrusion of a specific portion, which can prevent the specific portion of the light entrance plane 11 from being worn when it comes into contact with other objects, so that the glass substrate 1 can maintain a better light guiding effect.

Each of the ion exchange lenses 14 has a radius length R, the light guide region 13 has a light guide length L, and the light guide length L is from the light entrance plane 11 to the light exit side 12, and the radius length R and The ratio of the light guiding length L is preferably 1:7.85 to 1:22.85. After the light passes through the ion exchange lens 14 and enters the light guiding region 13, the light can travel an appropriate distance in the light guiding region 13. And collected on the light exiting side 12 to achieve a better light collecting effect.

In addition, the shape of the plurality of ion exchange lenses 14 is not limited herein. In the embodiment, the plurality of ion exchange lenses 14 are columnar structures extending along the light entrance plane 11 to improve the convenience of fabrication. .

The solar panel 2 has a light-receiving side 21 that is coupled to the light-emitting side 12 of the glass substrate 1. The light-receiving side 21 includes a bearing surface 211. The bearing surface 211 is provided with a plurality of electrodes 212, and the center position of each of the electrodes 212 is offset from each of the ion exchange lenses 14.

More specifically, the light receiving side 21 can generate electric energy after the light is irradiated, and output the electric energy through the plurality of electrodes 212. As shown in FIGS. 3 and 4, in the present embodiment, the plurality of ion exchange lenses 14 are columnar structures, and the columnar structures extend in a longitudinal direction, and the plurality of electrodes 212 also extend in the longitudinal direction. In the direction perpendicular to the longitudinal direction, the center position of each of the electrodes 212 is offset from each of the ion exchange lenses 14 so that the light collected by each of the ion exchange lenses 14 can illuminate the light receiving side 21 to avoid the The plurality of electrodes 212 shield the light receiving side 21 located in the illumination range, thereby increasing the light collecting effect of the light receiving side 21.

Each of the electrodes 212 has an electrode length W, and the ratio of the radius length R of the ion exchange lens 14 to the electrode length W of the electrode 212 is preferably 1:0.33 to 1:1. When the electrode 212 is disposed on the bearing surface 211 of the light receiving side 21, the limiting condition of the length W of the electrode can balance the photoelectric conversion efficiency and the power transmission effect, except that the plurality of electrodes 212 can be reduced to be effective for the light receiving side 21. The shielding of the light-receiving area can simultaneously take into account the power transmission of the electrode 212, and a better balance between the photoelectric conversion and the power transmission can be achieved to improve the overall photoelectric conversion efficiency of the solar power generation.

In the solar cell module of the present invention, the ion exchange lens of the glass substrate is formed by ion exchange technology, and only needs to control the thickness and electric field strength of the silver film, and has the effect of easily controlling the shape of the ion exchange lens.

In the solar cell module of the present invention, the plurality of ion exchange lenses are formed by ion exchange in the glass substrate, which can prevent the ion exchange lens from being in contact with other objects and wear, and has the function of maintaining the light guiding effect of the glass substrate. effect.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

〔this invention〕

1‧‧‧ glass substrate

11‧‧‧Into the light plane

12‧‧‧Lighting side

13‧‧‧Light Guide Area

14‧‧‧Ion exchange lens

2‧‧‧ solar panels

21‧‧‧Light side

211‧‧‧ bearing surface

212‧‧‧ electrodes

R‧‧‧ radius length

W‧‧‧electrode length

L‧‧‧Light guide length

[study]

7‧‧‧Light guide plate

71‧‧‧light side

72‧‧‧ Collecting lens

8‧‧‧ solar panels

81‧‧‧Photoelectric zone

9‧‧‧Light guide plate

91‧‧‧light side

92‧‧‧ embedded department

93‧‧‧Collection lens

Figure 1: The first schematic diagram of a conventional solar cell module.

Figure 2: The second schematic diagram of a conventional solar cell module.

Fig. 3 is an exploded perspective view of the solar cell module of the present invention.

Figure 4: Side view of the solar cell module of the present invention.

1‧‧‧ glass substrate

11‧‧‧Into the light plane

12‧‧‧Lighting side

13‧‧‧Light Guide Area

14‧‧‧Ion exchange lens

2‧‧‧ solar panels

21‧‧‧Light side

211‧‧‧ bearing surface

212‧‧‧ electrodes

L‧‧‧Light guide length

W‧‧‧electrode length

Claims (4)

A solar cell module comprising: a glass substrate having a light incident plane and a light exiting side, wherein the light exiting side is disposed opposite to the light incident plane, and a light guiding zone is formed between the light incident plane and the light exiting side The light guiding region has a plurality of ion exchange lenses adjacent to the light incident plane, the light guiding region has a light guiding length, and a ratio of a radius length of the ion exchange lens to a light guiding length of the light guiding region is 1:7.85 1:22.85; and a solar panel having a light receiving side, the light receiving side is coupled to the light emitting side of the glass substrate, and the light receiving side comprises a bearing surface, the bearing surface is provided with a plurality of electrodes, and the center position of each of the electrodes The ion exchange lens is misaligned. The solar cell module of claim 1, wherein each of the ion exchange lenses is a columnar structure extending along the light incident plane. The solar cell module of claim 1, wherein each of the electrodes has an electrode length. The solar cell module according to claim 3, wherein a ratio of a radius length of the ion exchange lens to an electrode length of the electrode is 1:0.33 to 1:1.