CN201868438U - A kind of solar cell module cover plate glass - Google Patents

Abstract

The utility model discloses a solar module cover plate glass, this solar module cover plate glass include the glass base member, and the glass base member has first surface and second surface, and the first surface sets up in the incident one side of orientation sunlight, and the second surface sets up in the one side that has the EVA layer of silicon chip towards solar module, and the first surface is provided with the decorative pattern structure that has hemisphere unit arch and hemisphere unit sunken, and the second surface is the matte structure. The cover plate glass of the solar cell module can effectively reduce the reflection light incident to the cover plate glass of the solar cell module, further improves the light transmittance of the solar cell module, is not easy to accumulate dust and clean, and can be applied to outdoor environments with severe environments.

Description

A kind of solar cell module cover plate glass

technical field

The utility model relates to the technical field of solar cells, in particular to a solar cell module cover glass.

Background technique

Solar cell module cover glass is also called solar glass cover, because solar cell module cover glass has the characteristics of high solar photoelectric conversion rate, low plate pressure damage rate, high strength and good flatness, it can fully transmit sunlight for solar energy The solar cell absorbs and protects the solar cell under it from being damaged by external wind, frost, rain, snow and other harsh weather or space operating conditions with its own strength. Therefore, it is widely used in various types and specifications of monocrystalline silicon wafers, Polycrystalline silicon wafers and solar cell modules of amorphous silicon wafers.

At present, the structure of the commonly used solar cell module cover glass includes a surface with a smooth plane and a surface with an embossed layer. When the solar cell module is packaged, the surface with a smooth plane faces the incident side of the sunlight, and the surface with an embossed layer faces the side of the solar cell, and the EVA layer is sealed and bonded to the solar cell.

For a long time, it has been believed that the packaging of solar cell modules can only be done with the smooth surface facing the side where the sunlight is incident, and the embossed surface facing the side of the solar cell, mainly because of the embossed surface. The surface can be firmly bonded with the EVA layer, and it is not easy to cause battery leakage. However, when the incident light passes through the smooth plane surface, the transmitted light is less than 92%, and about 8% of the reflected light is still lost. Therefore, how to more effectively reduce the reflected light incident on the solar cell module cover glass has become a research focus for people to further improve the light transmittance of the solar cell module cover glass.

In order to solve the above-mentioned technical bias problem, the Chinese utility model patent with the authorized announcement number: CN 100495734C disclosed a "glass plate for solar cell module encapsulation" on June 3, 2009. And the coating coated on the glass substrate, one side of the glass substrate is provided with an embossed layer with patterns, wherein, the coating on the glass substrate is formed by using nanometer materials, and the glass substrate above The coating is coated on the surface of the embossed layer", further "the shape of the pattern on the embossed layer is honeycomb shape, the honeycomb mouth is a deformed regular hexagon, the upper and lower opposite sides are parallel and equal, and the other four sides are equal, the honeycomb mouth is opposite to the upper and lower sides The value of the diagonal length a of the two parallel sides is 0.8mm, the vertical distance b between the upper and lower opposite sides is 0.9mm, the thickness of the coating is 130nm-145nm, and the honeycomb in the pattern of the embossed layer The length c of the upper and lower opposite sides of the deformed regular hexagon is 0.2 mm, and the honeycomb depth d in the embossed layer pattern is 0.55 mm to 0.6 mm."

Although the technical solution of the above-mentioned CN 100495734C Chinese utility model patent overcomes traditional technical prejudices, it adopts a technical solution contrary to traditional thinking. The flat faces the side of the solar cell. However, in actual use, this smooth plane is not firmly bonded to the EVA layer, which may easily cause battery leakage; moreover, the embossed layer adopts a honeycomb pattern structure and the honeycomb mouth is a deformed regular hexagon. The structural mold is relatively complex, and there are edges and corners between each honeycomb structure. Since solar cell modules are mostly installed outdoors in harsh environments, this angular structure is likely to cause dust to accumulate on the surface of the solar cell module cover glass, making it difficult to clean . The above-mentioned patent achieves the problem of easy cleaning by coating the embossed layer of the glass substrate with a coating that can modify the glass and reduce the tension, but the thickness of the coating is only 130nm to 145nm, and the edges and corners between the honeycombs The structure still exists, even if the coating is added, it still makes the surface of the solar cell module cover glass easy to accumulate dust, and at the same time increases the process steps of manufacturing the cover glass, which virtually increases the cost of the solar cell module, thus making solar energy The difficulty of application, promotion and popularization increases.

Therefore, there is an urgent need to provide a solar cell module cover glass that can reduce the reflection loss when sunlight is incident, ensure effective convergence when sunlight is transmitted, is not easy to accumulate dust, is easy to clean, and has a simple manufacturing process and low cost.

Utility model content

The purpose of this utility model is to avoid the deficiencies in the prior art and provide a method that can reduce the reflection loss when the sunlight is incident, ensure the effective convergence of the sunlight when it is transmitted, and is not easy to accumulate dust, easy to clean, and the manufacturing process Simple, low-cost solar module cover glass.

The purpose of this utility model is achieved through the following technical solutions:

The utility model provides a cover glass of a solar battery module, which includes a glass substrate, wherein the glass substrate has a first surface and a second surface, and the first surface is arranged on the incident side facing sunlight, so The second surface is arranged on the side of the EVA layer facing the solar cell module with the silicon wafer, the first surface is provided with a textured structure with hemispherical unit protrusions and hemispherical unit depressions, and the second surface is velvet surface structure. the

Wherein, the pattern structure is a pattern structure composed of the hemispherical unit protrusions and the hemispherical unit depressions arranged horizontally and vertically.

Wherein, the pattern structure is a pattern structure composed of the hemispherical unit protrusions and the hemispherical unit depressions spaced horizontally and vertically.

Wherein, the radii of the protrusion of the hemispherical unit and the depression of the hemispherical unit are both 0.3mm˜3mm.

Wherein, the radii of the protrusion of the hemispherical unit and the depression of the hemispherical unit are both 0.5mm˜1.9mm.

Wherein, the radii of the protrusion of the hemispherical unit and the depression of the hemispherical unit are both 1.7mm.

Wherein, the radius of the protrusion of the hemispherical unit and the depression of the hemispherical unit are both 1 mm.

Wherein, the suede structure is a flat suede structure or a cloth suede structure.

Wherein, the thickness of the glass substrate is 5.1mm-5.7mm.

Beneficial effects of the present utility model: a solar cell module cover glass of the present utility model includes a glass substrate, wherein the glass substrate has a first surface and a second surface, and the first surface is arranged on the incident side facing sunlight The second surface is arranged on the side of the EVA layer facing the solar cell module with the silicon wafer, the first surface is provided with a textured structure with hemispherical unit protrusions and hemispherical unit depressions, and the second surface is a suede structure. By changing the surface shape and structure of the glass substrate, the first surface of the glass substrate is set as a pattern structure with hemispherical unit protrusions and hemispherical unit depressions. On the one hand, it can ensure the effective concentration of sunlight when it is transmitted. On the other hand, because The hemispherical unit has a circular arc surface, and the hemispherical unit has horizontal and vertical concave-convex settings to form a pattern structure, so that the first surface has no edges and corners, but is composed of a smooth arc surface transition, so that the cover glass is not easy to accumulate dust and easy to Clean; and, the manufacturing process of the patterned structure of the cover glass of the solar cell module is relatively simple, the specific manufacturing method is: firstly, the mother knife roller (mold) is manufactured according to the patterned structure, the embossing roller is processed by the mould, and then the embossing roller is used to The glass with patterned structure is pressed, because the manufacturing process is relatively simple and the cost is low, so it is convenient for the popularization and application of the solar cell module cover glass. At the same time, the second surface of the glass substrate is set as a suede structure, so that the second surface can be firmly bonded to the EVA layer, and it is not easy to cause battery leakage. It is precisely because the second surface is a suede structure rather than a smooth plane structure. This makes it possible to realize technical solutions that overcome traditional technical prejudices. In summary, the solar cell module cover glass can effectively reduce the reflected light incident on the solar cell module cover glass, further improve the light transmittance of the solar cell module, and it is not easy to accumulate dust and easy to clean, and can be applied to outdoors with harsh environments etc. environment.

Description of drawings

The utility model is further described by using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present utility model.

Fig. 1 is a structural schematic diagram of a solar cell module cover glass of the present invention.

FIG. 2 is a schematic side view of the structure of FIG. 1 .

FIG. 3 is a schematic top view of the structure in FIG. 1 .

Fig. 4 is a schematic diagram of the cross-sectional structure along line A—A of Fig. 3 .

Fig. 5 is another structural schematic diagram of a solar cell module cover glass of the present invention.

Fig. 6 is a schematic diagram of the B-B cross-sectional structure in Fig. 5 .

In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 include: 10—glass substrate, 11—first surface, 12—second surface, 111—hemispherical unit protrusion, 112—hemispherical unit depression, 100—cover glass, 200—EVA layer with silicon wafer, 300—back plate.

Detailed ways

The utility model is further described in conjunction with the following examples.

Example 1

One of the specific implementations of a solar cell module cover glass of the present utility model, as shown in Figure 1, Figure 2, Figure 3 and Figure 4, includes a glass substrate 10, wherein the glass substrate 10 has a first surface 11 And the second surface 12, the first surface 11 is arranged on the side facing the sunlight incident, the second surface 12 is arranged on the side of the EVA layer facing the solar cell module with the silicon wafer, the first surface 11 is arranged on the side with the hemisphere The pattern structure of the unit protrusion 111 and the hemispherical unit depression 112, the second surface 12 is a suede structure. Wherein, the hemispherical unit depression 112 is a hemispherical hole surface. Specifically, the pattern structure is a pattern structure composed of hemispherical unit protrusions 111 and hemispherical unit depressions 112 arranged horizontally and vertically. Next to a hemispherical unit protrusion 111, so that the hemispherical unit protrusion 111 and the hemispherical unit depression 112 are arranged continuously; in the longitudinal direction, similarly, a hemispherical unit protrusion 111 is next to a hemispherical unit The depression 112 is connected with a hemispherical unit protrusion 111 , so that the hemispherical unit protrusion 111 and the hemispherical unit depression 112 are arranged continuously. The pattern structure composed of hemispherical unit protrusions 111 and hemispherical unit recesses 112 arranged horizontally and vertically has a continuous arc surface, so that the first surface 11 has no edges and corners, but is composed of a smooth arc surface transition, so that The cover glass is not easy to accumulate dust and is easy to clean.

When the solar cell module is packaged, the first surface 11 with the textured structure of the hemispherical unit protrusion 111 and the hemispherical unit recess 112 faces the side where the sunlight is incident, and the second surface 12 with the textured structure faces the solar cell. One side of the module has the EVA layer of the silicon chip. This setting not only enables the second surface 12 to be firmly bonded to the EVA layer, but is not easy to cause battery leakage, and can ensure that the incident light of sunlight passes through the protrusion 111 with the hemispherical unit. When incident with the first surface 11 of the patterned structure of the hemispherical unit depression 112 , the loss of reflected light can be reduced, and at the same time, it is ensured that the first surface 11 is not easy to accumulate dust and is easy to clean.

Wherein, the radius R of the hemispherical unit protrusion 111 may be 0.3 mm˜3 mm; the radius R of the hemispherical unit recess 112 may be 0.3 mm˜3 mm.

Wherein, the suede structure is a flat suede structure or a cloth suede structure. Specifically, the suede structure is a structure with a frosted effect, rather than a smooth planar structure. The textured suede structure is preferred, and may specifically be a straight grained suede structure or a diagonal grained suede structure.

Wherein, the thickness D of the glass substrate 10 is 5.1 mm˜5.7 mm.

Example 2

The second specific embodiment of a solar cell module cover glass of the present invention is shown in Figure 5 and Figure 6. The main technical solution of this embodiment is the same as that of Embodiment 1, and the features not explained in this embodiment , the explanation in Embodiment 1 is adopted, and the details are not repeated here, and the same components in FIG. 5 and FIG. 6 as those in FIG. 1, FIG. 2, FIG. 3 and FIG. 4 use the same symbols. The difference between this embodiment and Embodiment 1 is that the pattern structure is a pattern structure composed of hemispherical unit protrusions 111 and hemispherical unit recesses 112 arranged at intervals in the horizontal and vertical directions. That is, in the transverse direction, there is a certain distance between a hemispherical unit protrusion 111 and a hemispherical unit depression 112, and there is a certain distance between a hemispherical unit depression 112 and a hemispherical unit protrusion 111. Interval, such that the hemispherical unit protrusions 111 and the hemispherical unit depressions 112 are arranged at intervals in this order; in the longitudinal direction, there is a certain distance between a hemispherical unit protrusion 111 and a hemispherical unit depression 112, one There is a certain distance between the hemispherical unit depression 112 and one hemispherical unit protrusion 111 , so that the hemispherical unit protrusion 111 and the hemispherical unit depression 112 are spaced apart in sequence. The intervals of certain distances referred to above may be equidistant or unequal. This arrangement can make the silicon wafers in the EVA layer with silicon wafers processed wider, further reduce the processing cost of the silicon wafers, and facilitate the assembly of solar cell modules, thereby saving manual work and reducing manufacturing costs.

Example 3

The third specific embodiment of a solar cell module cover glass of the present invention, the main technical solution of this embodiment is the same as that of embodiment 1, and the features not explained in this embodiment shall be explained in embodiment 1, No further details will be given here. The difference between this embodiment and Embodiment 1 is that the radius R of the hemispherical unit protrusion 111 is 0.5 mm˜1.9 mm, and the radius R of the hemispherical unit recess 112 is 0.5 mm˜1.9 mm.

Wherein, the radius R of the hemispherical unit protrusion 111 can be selected from 0.5mm, 1.9mm, 1.7mm or 1mm, and the radius R of the hemispherical unit depression 112 can be selected from 0.5mm, 1.9mm, 1.7mm or 1mm.

In addition, the hemispherical unit protrusion 111 and the hemispherical unit recess 112 may have the same radius length or different radius lengths.

Wherein, the thickness D of the glass substrate 10 may be 5.1 mm, 5.7 mm or 5.4 mm.

Example 4

The fourth specific embodiment of a solar cell module cover glass of the present invention, the main technical solution of this embodiment is the same as that of embodiment 2, and the features not explained in this embodiment are explained in embodiment 2, No further details will be given here. The difference between this embodiment and Embodiment 2 is that, the radius R of the hemispherical unit protrusion 111 is 0.5 mm˜1.9 mm, and the radius R of the hemispherical unit recess 112 is 0.5 mm˜1.9 mm.

Wherein, the radius R of the hemispherical unit protrusion 111 can be selected from 0.5mm, 1.9mm, 1.7mm or 1mm, and the radius R of the hemispherical unit depression 112 can be selected from 0.5mm, 1.9mm, 1.7mm or 1mm.

In addition, the hemispherical unit protrusion 111 and the hemispherical unit recess 112 may have the same radius length or different radius lengths.

Wherein, the thickness D of the glass substrate 10 may be 5.1 mm, 5.7 mm or 5.4 mm.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (9)

1. solar module cover-plate glass, include glass basis, it is characterized in that: described glass basis has first surface and second surface, described first surface is arranged at incident one side towards sunlight, described second surface is arranged at the side towards the EVA layer with silicon chip of solar module, described first surface is provided with the pattern structure with hemisphere unit projection and hemisphere unit depression, and described second surface is a suede structure.

2. solar module cover-plate glass according to claim 1 is characterized in that: described pattern structure is for being provided with the pattern structure that constitutes continuously by described hemisphere unit projection and horizontal the indulging of described hemisphere unit depression.

3. solar module cover-plate glass according to claim 1 is characterized in that: described pattern structure is provided with the pattern structure that constitutes for the horizontal vertical interval of being caved in by described hemisphere unit projection and described hemisphere unit.

4. solar module cover-plate glass according to claim 1 is characterized in that: the radius of described hemisphere unit projection and described hemisphere unit depression is 0.3mm～3mm.

5. solar module cover-plate glass according to claim 4 is characterized in that: the radius of described hemisphere unit projection and described hemisphere unit depression is 0.5mm～1.9mm.

6. solar module cover-plate glass according to claim 5 is characterized in that: the radius of described hemisphere unit projection and described hemisphere unit depression is 1.7mm.

7. solar module cover-plate glass according to claim 5 is characterized in that: the radius of described hemisphere unit projection and described hemisphere unit depression is 1mm.

8. according to each described solar module cover-plate glass in the claim 1 to 7, it is characterized in that: described suede structure is plane suede structure or woven design suede structure.

9. solar module cover-plate glass according to claim 1 is characterized in that: the thickness of described glass basis is 5.1mm～5.7mm.

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