Glass glaze for photovoltaic module, preparation method of glass glaze and photovoltaic module

Abstract

The invention provides a glass glaze for a photovoltaic module, a preparation method of the glass glaze and the photovoltaic module, and the glass glaze is prepared from the following raw materials in percentage by mass: 99.8%-99.96% of white glaze and 0.04%-0.20% of TiO2, the sintering temperature of the glass glaze is 680-770 DEG C, and the sintering time is 100-130 seconds. The adhesive force of the prepared glass glaze reaches grade 1, the expansion coefficient reaches about 83 * 10 <-7 > / DEG C, the expansion coefficient is close to 70-85 * 10 <-7 > / DEG C of glass, and after the glass glaze is adopted, the working temperature of a photovoltaic module is reduced to about 48 DEG C.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic modules, in particular to a glass glaze for photovoltaic modules and a preparation method thereof and a photovoltaic module. Background Art

[0002] Due to the performance of the silicon material of the cells in the photovoltaic modules, as the operating temperature of the cells increases, the open circuit voltage decreases and the short circuit current increases. However, considering the open circuit voltage and short circuit current, the power output of the photovoltaic modules ultimately presents a negative temperature coefficient relationship, that is, the higher the temperature, the lower the output power, resulting in a corresponding decrease in power generation. The ideal operating temperature for conventional photovoltaic modules to generate electricity is around 25°C. For every 1°C increase in operating temperature, the output power will decrease by about 0.35% (the power temperature coefficient of mainstream photovoltaic module PERC products is -0.35% / °C), and the power generation of the photovoltaic power station will also decrease by about 0.35%.

[0003] With the continuous high temperature weather in recent years, the operating temperature of photovoltaic modules has been far greater than 25℃. The continuous high temperature weather will not only cause a significant decrease in the power generation of photovoltaic modules, but also increase the risk of hot spots in modules and the probability of equipment failure. Therefore, reducing the operating temperature of photovoltaic modules is the most urgent thing for the photovoltaic industry.

[0004] White grid glass is a raw material for photovoltaic double-glass modules. It is used on the back of the module to protect the cells and improve the overall mechanical load strength of the module. The printed white grid is a photovoltaic glass glaze, a coating material used to form a thin protective layer on the surface of photovoltaic glass to increase the power generation efficiency of photovoltaic modules. This glaze is usually a highly reflective white glaze, mainly composed of glass flux, functional whitening powder, ink oil and other materials. It is a white glaze product made by stirring, grinding and homogenizing multiple materials.

[0005] TiO 2 It has good spectral selective transmission performance: it has a high transmittance in the 8-13μm band, allowing most of the infrared radiation emitted by objects on the earth's surface to pass through the film material and radiate to the outer space of the atmosphere where the absolute temperature is close to zero degrees. In the visible-near infrared band, its transmittance is less than 15%, which has a good effect of blocking sunlight. 2 When added to commercially available white glazes, there is a problem of reduced adhesion of the glaze on the glass. Summary of the invention

[0006] The present invention provides a glass glaze for photovoltaic modules and a preparation method thereof and a photovoltaic module. The adhesion of the glass glaze reaches level 1 and the expansion coefficient reaches 83*10 -7 / ℃, the expansion coefficient is about 70-85*10-7 / ℃ is close to that of the photovoltaic module. After adopting the glass glaze of the present invention, the operating temperature of the photovoltaic module drops to about 48℃.

[0007] The technical solution of the present invention is achieved as follows: a glass glaze for photovoltaic modules is prepared from the following raw materials in percentage by mass: 99.8%-99.96% white glaze and 0.04%-0.20% TiO 2 .

[0008] A method for preparing a glass glaze for a photovoltaic module comprises the following steps: 2 Add to the white glaze, mix and stir, grind, and then keep at a sintering temperature of 680-770℃ for 100-130s to obtain glass glaze.

[0009] Furthermore, the sintering temperature is maintained at 700-750° C. for 110-120 seconds.

[0010] A photovoltaic component comprises white grid glass, the surface of which is attached with a glaze film, which is prepared from the glass glaze material.

[0011] Furthermore, the thickness of the glaze film is 20-35um.

[0012] Furthermore, the thickness of the glaze film is 24-32um.

[0013] Beneficial effects of the present invention:

[0014] The present invention can effectively reduce the operating temperature of photovoltaic modules during long-term outdoor use. In a year-round comparative test at a demonstration base in Haikou, Hainan (high temperature and high humidity environment), the average temperature of conventional modules (glass glaze only uses white glaze) can reach above 60°C in 12 months, while the operating temperature of photovoltaic modules after using the glass glaze of the present invention drops to about 48°C, effectively avoiding the decrease in power generation, the risk of hot spots, equipment failures, etc. caused by high operating temperature, and having a good effect on economic benefits and stable system operation.

[0015] The present invention maintains the sintering temperature at 680-770°C for 100-130s to prepare the glass glaze. When the glaze film thickness of the white grid glass is 20-35um, the adhesion of the glass glaze reaches level 1 and the expansion coefficient reaches 83*10 -7 / ℃, the expansion coefficient is about 70-85*10 -7 / ℃ are close. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The white glaze of the embodiment of the present invention was purchased from Chenguang (Changzhou) New Material Technology Co., Ltd., model CG-201.

[0018] Example 1

[0019] A glass glaze for photovoltaic modules is prepared from the following raw materials in percentage by mass: 99.8% white glaze and 0.20% TiO 2 .

[0020] The preparation method of the glass glaze comprises the following steps: 2 The mixture is added to the white glaze, mixed and stirred, ground, and then kept at a sintering temperature of 720°C for 115s to obtain a glass glaze.

[0021] A photovoltaic component comprises white grid glass, the surface of which is adhered with a glaze film with a thickness of 25 μm, and the glaze film is printed on the glass by a screen printing process using the glass glaze material.

[0022] Example 2

[0023] A glass glaze for photovoltaic modules is prepared from the following raw materials in percentage by mass: 99.9% white glaze and 0.10% TiO 2 .

[0024] The preparation method of the glass glaze comprises the following steps: 2 The mixture is added to the white glaze, mixed, stirred, ground, and then sintered at 700°C for 110 seconds to obtain a glass glaze.

[0025] A photovoltaic component comprises white grid glass, the surface of which is adhered with a glaze film with a thickness of 30 μm, and the glaze film is printed on the glass by a screen printing process using the glass glaze material.

[0026] Example 3

[0027] A glass glaze for photovoltaic modules is prepared from the following raw materials in percentage by mass: 99.96% white glaze and 0.04% TiO 2 .

[0028] A method for preparing a glass glaze for a photovoltaic module comprises the following steps: 2The mixture is added to the white glaze, mixed and stirred, ground, and then kept at a sintering temperature of 750°C for 120s to obtain a glass glaze.

[0029] A photovoltaic component comprises white grid glass, the surface of which is adhered with a glaze film with a thickness of 32 μm, and the glaze film is printed on the glass by a screen printing process using the glass glaze material.

[0030] Example 4

[0031] A glass glaze for photovoltaic modules is prepared from the following raw materials in percentage by mass: 99.96% white glaze and 0.04% TiO 2 .

[0032] A method for preparing a glass glaze for a photovoltaic module comprises the following steps: 2 The mixture is added to the white glaze, mixed and stirred, ground, and then kept at a sintering temperature of 770°C for 130s to obtain a glass glaze.

[0033] A photovoltaic component comprises white grid glass, the surface of which is adhered with a glaze film with a thickness of 32 μm, and the glaze film is printed on the glass by a screen printing process using the glass glaze material.

[0034] Comparative Example 1

[0035] A glass glaze for photovoltaic modules is prepared from the following raw materials in mass percentage: 100% white glaze. The preparation method of the glass glaze comprises the following steps: mixing and stirring the white glaze, grinding it, and then maintaining the sintering temperature at 700°C for 115 seconds to obtain the glass glaze.

[0036] A photovoltaic component comprises white grid glass, the surface of which is adhered with a glaze film with a thickness of 30 μm, and the glaze film is printed on the glass by a screen printing process using the glass glaze material.

[0037] Comparative Example 2

[0038] A glass glaze for photovoltaic modules is prepared from the following raw materials in percentage by mass: 99.96% white glaze and 0.04% TiO 2 .

[0039] A method for preparing a glass glaze for a photovoltaic module comprises the following steps: 2 The mixture is added to the white glaze, mixed and stirred, ground, and then kept at a sintering temperature of 650°C for 90s to obtain a glass glaze.

[0040] A photovoltaic component comprises white grid glass, the surface of which is adhered with a glaze film with a thickness of 32 μm, and the glaze film is printed on the glass by a screen printing process using the glass glaze material.

[0041] Comparative Example 3

[0042] A glass glaze for photovoltaic modules is prepared from the following raw materials in percentage by mass: 99.96% white glaze and 0.04% TiO 2 .

[0043] A method for preparing a glass glaze for a photovoltaic module comprises the following steps: 2 The mixture is added to the white glaze, mixed and stirred, ground, and then kept at a sintering temperature of 800°C for 150s to obtain a glass glaze.

[0044] A photovoltaic component comprises white grid glass, the surface of which is adhered with a glaze film with a thickness of 32 μm, and the glaze film is printed on the glass by a screen printing process using the glass glaze material.

[0045] The performance effects of the glass glaze and photovoltaic modules prepared in Example 1 and Comparative Examples 1-3 are as follows:

[0046]

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A glass glaze for photovoltaic modules, It is characterized in that Prepared from the following raw materials in mass percentage: 99.8%-99.96% white glaze and 0.04%-0.20% TiO 2 .

2. A method for preparing the glass glaze for photovoltaic modules according to claim 1, It is characterized in that The following steps are involved: TiO 2 Add to the white glaze, mix and stir, grind, and then keep at a sintering temperature of 680-770℃ for 100-130s to obtain glass glaze.

3. The preparation method according to claim 2, It is characterized in that The sintering temperature is maintained at 700-750°C for 110-120s.

4. A photovoltaic module, comprising white grid glass, the surface of which is attached with a glaze film, It is characterized in that The glaze film is prepared from the glass glaze according to claim 1.

5. A photovoltaic module according to claim 4, It is characterized in that The thickness of the glaze film is 20-35um.

6. A photovoltaic module according to claim 5, It is characterized in that The thickness of the glaze film is 24-32um.

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