Glazed photovoltaic glass

Abstract

The utility model discloses glazed photovoltaic glass which comprises raw glass, a plurality of first glaze layers and a plurality of second glaze layers. The plurality of first glaze layers are arranged on the first surface of the raw sheet glass at intervals along a first distribution direction or a second distribution direction, and the plurality of second glaze layers are arranged on the second surface of the raw sheet glass at intervals along the first distribution direction or the second distribution direction. When the glazed photovoltaic glass disclosed by the utility model is produced and prepared, the tempering degree and stress difference between the glazed area and the blank area of the glazed photovoltaic glass can be obviously reduced to tend to be uniform, and the problems of bubbles and flaws do not exist at the interface of the glazed photovoltaic glass glaze and the glass; and moreover, the strength of the glazed photovoltaic glass cannot be reduced due to mismatching of the glaze and the glass expansion rate, and the thickness of the glaze layer of the glazed photovoltaic glass can exceed 25 microns.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic, in particular to a glazed photovoltaic glass. Background Art

[0002] Currently, the glazing of the commonly used photovoltaic glass is generally carried out on the back glass according to the layout, and the glazing is carried out at the gap positions between the battery cells. Generally, it is a long strip-shaped, completely filled porcelain white or porcelain black strip. The glazing width is generally more than 10 mm. In the middle, the width is wider in the surrounding and the middle bus bar area. Considering the reflectivity requirements, the glazing thickness cannot be less than 15 μm, but since the glazing will affect the glass strength, the glazing thickness cannot be higher than 25 μm.

[0003] Due to the large area of the existing glazing strips and strong light reflection, during the tempering process, when the tempering furnace radiates heat, due to the shielding and reflection of the glaze layer, the temperatures of the glazed area and the blank area are uneven, resulting in inconsistent tempering degrees of the glazed area and the blank area during cooling. Research shows that the stress on the surface of the glass plate in the glazed area is about 40 MPa, while the stress in the non-glazed area can reach 100 MPa. The surface stress (tempering degree) at the glazing position is significantly less than that at the blank position. Uneven tempering will cause the strength of the glazed glass to be significantly lower than that of the non-glazed glass, and the glazed glass is prone to back glass explosion during use.

[0004] At the same time, due to the large glazing area (about 20% of the glass area), and each glazing strip is long strip-shaped and completely filled, the inconsistent expansion rates of the glaze and the glass and the bubbles and defects that are easily generated at the interface between the glaze and the glass during the sintering process of the glaze will affect the glass strength, and it is easy to cause the problem of breakage of the glazed glass. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the defects in the prior art and provide a glazed photovoltaic glass.

[0006] The utility model solves the above technical problem through the following technical solutions:

[0007] A glazed photovoltaic glass, comprising:

[0008] A raw glass sheet;

[0009] A plurality of first glaze layers, which are arranged at intervals along the first distribution direction or the second distribution direction on the first surface of the raw glass sheet;

[0010] A plurality of second glaze layers, which are arranged at intervals along the first distribution direction or the second distribution direction on the second surface of the raw glass sheet.

[0011] Preferably, an interval area is provided between adjacent first glaze layers, and the second glaze layer is arranged opposite to the interval area.

[0012] Preferably, the length of the second glaze layer in the first distribution direction is greater than the length of the spacing area in the first distribution direction, and the length of the second glaze layer in the second distribution direction is greater than the length of the spacing area in the second distribution direction.

[0013] Preferably, the original sheet glass is calendered glass or float glass, and the first surface is the embossed surface of the calendered glass or the non-tin surface of the float glass.

[0014] Preferably, the length of the spacing area in the first distribution direction or the second distribution direction is B;

[0015] The length of the second glaze layer in the first distribution direction or the second distribution direction is L;

[0016] The overlapping length of one side of the second glaze layer and the adjacent first glaze layer in the first distribution direction or the second distribution direction is ΔL;

[0017] The included angle between the incident sunlight and the surface of the glazed photovoltaic glass is α;

[0018] The thickness of the glazed photovoltaic glass is T;

[0019] Then ΔL = (L - B) / 2 = T / tanα.

[0020] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0021] The positive and progressive effects of the present invention are as follows: For the glazed photovoltaic glass of the present invention, during production and preparation, the difference in tempering degree and stress between the glazed area and the blank area of itself can be significantly reduced and tend to be uniform, and there are no problems of bubbles and defects at the interface between the glaze of the glazed photovoltaic glass and the glass, and the glazed photovoltaic glass will not have a strength reduction caused by the mismatch of the expansion rates of the glaze and the glass, and the thickness of the glaze layer of the glazed photovoltaic glass can exceed 25 μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a flowchart of the method for glazing a photovoltaic glass according to a preferred embodiment of the present invention.

[0023] Figure 2 It is a schematic diagram of the glazed photovoltaic glass according to a preferred embodiment of the present invention.

[0024] Figure 3 It is a partially enlarged schematic diagram of glazing on the first surface according to a preferred embodiment of the present invention.

[0025] Figure 4 It is a partially enlarged schematic diagram of glazing on the second surface according to a preferred embodiment of the present invention.

[0026] Figure 5 This is a partially enlarged schematic diagram of the glazed finished products on the first side and the second side of the preferred embodiment of the present utility model.

[0027] Figure 6 This is a schematic cross-sectional view of the first side and the second side of the preferred embodiment of the present utility model after glazing.

[0028] Figure 7 This is a schematic diagram of radiant heating during the toughening process of the preferred embodiment of the present utility model.

[0029] Figure 8 This is a schematic diagram of incident light on the back surface after the preferred embodiment of the present utility model is made into a component.

[0030] Explanation of reference numerals in the drawings:

[0031] Glazed area 1

[0032] Blank area 2

[0033] First glaze layer 3

[0034] Original sheet glass 4

[0035] Second glaze layer 5

[0036] Thermal radiation light ray 6

[0037] Incident light on the back surface 7 Specific implementation manner

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be noted that in the claims and the specification of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising one" does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0040] As Figure 1 shown, this embodiment discloses a method for glazing photovoltaic glass, which includes a first-side glazing step, a second-side glazing step and a tempering step.

[0041] The first-side glazing step refers to glazing at intervals on the first side of the pre-treated original glass 4.

[0042] The second-side glazing step refers to glazing at intervals on the second side of the original glass 4 to obtain double-sided glazed glass, and the second side is the side opposite to the first side. To facilitate glazing on the second side more conveniently, the glass that has been glazed on the first side can be flipped first.

[0043] The tempering step refers to tempering the double-sided glazed glass. Specifically, after flipping the double-sided glazed glass, it is sent into a tempering furnace for tempering.

[0044] In this embodiment, by adopting the above glazing method, the area of a single glazed area on the surface of the photovoltaic glass can be reduced, and the problems of significant differences in tempering degree and stress between the glazed area 1 and the blank area 2 caused by light shielding and reflection due to large-area continuous single-sided glazing are solved. The problems of bubbles and defects caused at the interface between the glaze and the glass brought about by the large-area continuous single-sided glazing method are also solved, and the problem of reduced strength caused by the mismatch between the expansion rates of the glaze and the glass amplified by the large-area continuous single-sided glazing is also solved.

[0045] More specifically, in the first-side glazing step, a number of first glaze layers 3 are coated on the first side of the original glass 4 at intervals along the first distribution direction or the second distribution direction ( Figure 2 the X direction shown in is the first distribution direction, and the Y direction is the second distribution direction), and the adjacent first glaze layers 3 are separated by an interval area. In the second-side glazing step, a number of second glaze layers 5 are coated on the second side of the original glass 4 at intervals along the first distribution direction or the second distribution direction, and the second glaze layers 5 are arranged opposite to the interval areas.

[0046] In this embodiment, by adopting the method of glazing with the first glaze layer 3 and the second glaze layer 5 spaced apart and double-sided staggered gap glazing, during the process of heating in the toughening furnace, the thermal radiation light 6 heats the original sheet glass 4 through the intervals of the first glaze layer 3, and at the same time, it is reflected by the second glaze layer 5 to the position blocked by the first glaze layer 3, which can significantly reduce the temperature difference between the glazed area 1 and the blank area 2 caused by light blocking and reflection due to large-area continuous single-sided glazing, thereby greatly improving the uniformity of the toughening degree and stress between the glazed area 1 and the blank area 2.

[0047] Furthermore, in this embodiment, the length of the second glaze layer 5 in the first distribution direction is greater than the length of the interval area in the first distribution direction, and the length of the second glaze layer 5 in the second distribution direction is greater than the length of the interval area in the second distribution direction. Thus, when the thermal radiation heats the original sheet glass 4 through the intervals of the first glaze layer 3, it can be more fully reflected to the position blocked by the first glaze layer 3 through the second glaze layer 5, and further reduce the temperature difference between the glazed area 1 and the blank area 2, which is more conducive to improving the uniformity of the toughening degree and stress between the glazed area 1 and the blank area 2.

[0048] The shapes of the first glaze layer 3 and the second glaze layer 5 can be rectangular, rhombic or other shapes, and the colors can vary according to requirements or material properties.

[0049] The glazing method of the photovoltaic glass in this embodiment also solves the problem that existing glaze materials may affect the glass strength when exceeding 25μm, and the glazing thickness can be made higher than 25μm. Therefore, in the first-side glazing step and / or in the second-side glazing step, the glaze layer thickness and the content of glass powder in the formula can be increased to improve the reflectivity and wear resistance, bringing power gain.

[0050] In this embodiment, due to the use of spaced glazing, after the back-incident light 7 irradiates the first glaze layer 3 through the second-side interval, it is different from the conventional glazing that will be reflected out, but is reflected to the second glaze layer 5 and then reflected into the glass interior, thus bringing power gain.

[0051] Furthermore, in this embodiment, a pretreatment step is also included before the first-side glazing step, preprocessing the original sheet glass 4, and the pretreatment includes opening holes, edge grinding and cleaning, etc., to facilitate glazing and improve the glazing quality. More specifically, a rolled glass with a size of 1716*1128*1.6mm is used, the glazing layout uses the existing conventional glazing layout, white glaze material is selected for glazing, and the glazing width is consistent with the layout Figure 1 and the glazing thickness is 15 - 40μm.

[0052] In addition, a testing step is also included after the toughening step, testing the reflectivity and impact resistance of the double-sided glazed glass after toughening to ensure that there are no quality problems.

[0053] As shown Figures 2 - 8 In the present embodiment, a glazed photovoltaic glass is further disclosed, which is prepared by using the above-mentioned glazing method for photovoltaic glass. The glazed photovoltaic glass includes a base glass 4, a plurality of first glaze layers 3 and a plurality of second glaze layers 5.

[0054] The plurality of first glaze layers 3 are arranged at intervals along a first distribution direction or a second distribution direction on the first surface of the base glass 4, and the plurality of second glaze layers 5 are arranged at intervals along the first distribution direction or the second distribution direction on the second surface of the base glass 4.

[0055] For the glazed photovoltaic glass of the present embodiment, adopting the above structural form, during production and preparation, the difference in tempering degree and stress between the glazed area 1 and the blank area 2 of itself can be significantly reduced and tend to be uniform. Moreover, there are no problems of bubbles and defects at the interface between the glaze of the glazed photovoltaic glass and the glass, and the glazed photovoltaic glass will not have a strength reduction caused by the mismatch of the expansion rates of the glaze and the glass. In addition, the thickness of the glaze layer of the glazed photovoltaic glass can exceed 25 μm.

[0056] Further, in the present embodiment, an interval area is provided between adjacent first glaze layers 3, and the second glaze layer 5 is arranged opposite to the interval area.

[0057] For the glazed photovoltaic glass of the present embodiment, adopting the above structural form, during production and preparation, when heat radiation heats the base glass 4 through the intervals of the first glaze layers 3, it can be more fully reflected to the positions blocked by the first glaze layers 3 through the second glaze layer 5. Furthermore, the temperature difference between the glazed area 1 and the blank area 2 caused by light blocking and reflection due to large-area continuous single-sided glazing can be significantly reduced, thereby greatly improving the uniformity of the tempering degree and stress between the glazed area 1 and the blank area 2.

[0058] Further, the length of the second glaze layer 5 in the first distribution direction is greater than the length of the interval area in the first distribution direction, and the length of the second glaze layer 5 in the second distribution direction is greater than the length of the interval area in the second distribution direction.

[0059] For the glazed photovoltaic glass of the present embodiment, adopting the above structural form, during production and preparation, when heat radiation heats the base glass 4 through the intervals of the first glaze layers 3, it can be more fully reflected to the positions blocked by the first glaze layers 3 through the second glaze layer 5. Furthermore, the temperature difference between the glazed area 1 and the blank area 2 is further reduced, which is more conducive to improving the uniformity of the tempering degree and stress between the glazed area 1 and the blank area 2.

[0060] Further, in the present embodiment, the base glass 4 is made of rolled glass or float glass, and the first surface is the embossed surface of the rolled glass or the non-tin surface of the float glass.

[0061] Further, in this embodiment, the length of the spacing region in the first distribution direction or the second distribution direction is B.

[0062] The length of the second glaze layer 5 in the first distribution direction or the second distribution direction is L.

[0063] The overlapping length of the second glaze layer 5 and the first glaze layer 3 adjacent to one side of the second glaze layer 5 in the first distribution direction or the second distribution direction is ΔL.

[0064] The angle between the sun's incident light and the surface of the glazed photovoltaic glass is α.

[0065] The thickness of the glazed photovoltaic glass is T.

[0066] Then ΔL = (L - B) / 2 = T / tanα.

[0067] Preferably, the calculation methods of the sizes of the first and second glaze layers can be changed according to the angle, but the effect of spaced glazing should still be restricted.

[0068] After testing, for the glazed photovoltaic glass of this embodiment obtained by using the novel glazing method in this patent, the difference in tempering degree between the glazed area 1 and the blank area 2 is within 10 MPa, which conforms to the test results of conventional semi-tempered glass. The four-point bending strength is consistent with the test results of the non-glazed backplane glass of the same batch. There is no difference in the impact resistance between the glazed area 1 and the blank area 2 (the breaking height is above 100 cm). The reflectivity is about 78%, showing a significant improvement, and the test results are uniform without abnormality.

Claims

1. A glazed photovoltaic glass, characterized in that, Comprising: Original sheet glass; Multiple first glaze layers, which are arranged at intervals along a first distribution direction or a second distribution direction on a first surface of the original sheet glass; Multiple second glaze layers, which are arranged at intervals along a first distribution direction or a second distribution direction on a second surface of the original sheet glass.

2. The glazed photovoltaic glass according to claim 1, characterized in that, An interval region is formed between adjacent first glaze layers, and the second glaze layer is disposed opposite to the interval region.

3. The glazed photovoltaic glass according to claim 2, characterized in that, The length of the second glaze layer in the first distribution direction is greater than the length of the interval region in the first distribution direction, and the length of the second glaze layer in the second distribution direction is greater than the length of the interval region in the second distribution direction.

4. The glazed photovoltaic glass according to claim 1, wherein The original sheet glass is made of rolled glass or float glass, and the first surface is the embossed surface of the rolled glass or the non-tin surface of the float glass.

5. The glazed photovoltaic glass according to claim 3, wherein, The length of the interval region in the first distribution direction or the second distribution direction is B; The length of the second glaze layer in the first distribution direction or the second distribution direction is L; The overlapping length of one side of the second glaze layer and the adjacent first glaze layer in the first distribution direction or the second distribution direction is ΔL; The included angle between the incident sunlight and the surface of the glazed photovoltaic glass is α; The thickness of the glazed photovoltaic glass is T; Then ΔL = (L - B) / 2 = T / tanα.

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