Double-glass assembly

Abstract

The utility model relates to a double-glass assembly which comprises a first glass substrate, a second glass substrate and a battery piece, the thickness of the first glass substrate is smaller than or equal to 1.7 mm, the second glass substrate is arranged on the first glass substrate in the thickness direction of the first glass substrate, and the thickness of the second glass substrate is larger than that of the first glass substrate. The battery piece is arranged between the first glass substrate and the second glass substrate, a first adhesive film layer is arranged between the battery piece and the first glass substrate, and a second adhesive film layer is arranged between the battery piece and the second glass substrate; according to the double-glass assembly, the thickness of the first glass substrate is controlled to be 1.7 mm or below, and the thickness of the second glass substrate is larger than that of the first glass substrate, so that compared with packaging glass with the thickness of 2.0 mm, the double-glass assembly is convenient to transport and install, the packaging cost is guaranteed, the double-glass assembly has higher mechanical strength and impact resistance, and the use reliability is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic packaging technology, and in particular to double-glass modules. Background Art

[0002] With the development of the photovoltaic industry, the use of double-glass solar photovoltaic modules is increasing.

[0003] Traditional double-glass solar photovoltaic modules mostly use double 2.0mm thick encapsulation glass to encapsulate solar cells to avoid the problem of high weight of the encapsulation glass, which leads to difficult transportation and installation and high encapsulation cost. However, the mechanical strength and impact resistance of double-glass solar photovoltaic modules made of double 2.0mm thick encapsulation glass are limited, and there is a greater risk of failure in application scenarios with extreme weather, and the reliability of use is limited. Utility Model Content

[0004] Based on this, it is necessary to provide a double-glass component to address the above-mentioned problem of not being able to have good mechanical strength and impact resistance while being convenient for transportation and installation and ensuring packaging costs.

[0005] According to one aspect of the present application, a double-glass component is provided, comprising:

[0006] A first glass substrate, wherein the thickness of the first glass substrate is less than or equal to 1.7 mm;

[0007] a second glass substrate, wherein the second glass substrate is disposed on the first glass substrate along a thickness direction of the first glass substrate, and the thickness of the second glass substrate is greater than the thickness of the first glass substrate;

[0008] The battery cell is arranged between the first glass substrate and the second glass substrate, and a first adhesive film layer is arranged between the battery cell and the first glass substrate, and a second adhesive film layer is arranged between the battery cell and the second glass substrate.

[0009] In one of the embodiments, the thickness of the second glass substrate is greater than or equal to 2.4 mm.

[0010] In one embodiment, the thickness of the second glass substrate is greater than or equal to 2.5 mm.

[0011] In one embodiment, the difference in thickness between the first glass substrate and the second glass substrate is 0.8 mm-3 mm.

[0012] In one embodiment, the first glass substrate is a front glass, and the second glass substrate is a back glass.

[0013] In one embodiment, the first glass substrate is at least one of float glass and patterned glass, and the second glass substrate is at least one of float glass and patterned glass.

[0014] In one of the embodiments, the surface stress of the first glass substrate is greater than or equal to 60 MPa, and the surface stress of the second glass substrate is greater than or equal to 90 MPa.

[0015] In one of the embodiments, the surface stress of the first glass substrate is greater than or equal to 60 MPa and less than or equal to 90 MPa.

[0016] In one of the embodiments, the surface stress of the first glass substrate is greater than or equal to 90 MPa and less than or equal to 150 MPa.

[0017] In one embodiment, the thickness of the first adhesive film layer is consistent with the thickness of the second adhesive film layer.

[0018] The above-mentioned double-glass assembly controls the thickness of the first glass substrate to be less than 1.7 mm and makes the thickness of the second glass substrate greater than the thickness of the first glass substrate. Compared with the packaging glass with a thickness of 2.0 mm, it is not only easy to transport and install, and ensures the packaging cost, but also has stronger mechanical strength and impact resistance, thereby improving the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structural disassembly of the double-glass assembly of some embodiments of the present application.

[0020] Figure 2 Schematic diagram of the partial structure of the double-glass assembly of some embodiments of the present application.

[0021] Figure 3 Schematic diagram of the structure of the first glass substrate of the double-glass assembly in some embodiments of the present application.

[0022] Reference numerals:

[0023] 1. First glass substrate; 11. Top surface; 12. Bottom surface; 13. Groove; 2. Battery cell; 3. Second glass substrate; 4. First adhesive film layer; 5. Second adhesive film layer. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0030] Among all new energy sources, photovoltaic energy occupies an important position, and the development of photovoltaic new energy is widely valued worldwide. China is rich in solar energy resources, and the installation volume of crystalline silicon battery modules is increasing. Compared with conventional modules, double-glass modules have a huge application market because they can be perfectly combined with photovoltaic buildings and can meet specific application requirements, such as photovoltaic awnings, balconies, blinds, etc. Developing a new generation of high-efficiency, low-cost crystalline silicon battery modules and achieving product differentiation has become the goal pursued by the entire photovoltaic industry.

[0031] At present, double-glass solar photovoltaic modules generally use double 2.0mm thick encapsulation glass to encapsulate solar cells to meet the specified load requirements and IEC standards. In some application scenarios with extreme weather, the failure risk of double 2.0 encapsulation glass will be greatly increased. However, since the surface stress and mechanical strength of double 2.0 encapsulation glass are limited by tempering conditions, it is difficult for the current double 2.0 encapsulation glass to improve its mechanical strength and impact resistance, and it cannot guarantee the use effect in application scenarios with extreme weather.

[0032] Based on this, the present application provides a double-glass component, which can be easy to transport and install, ensure the packaging cost, and has stronger mechanical strength and impact resistance, thereby improving the reliability of use while having the same overall thickness as double 2.0mm thick packaging glass.

[0033] See also Figure 1 and Figure 2 An embodiment of the present application provides a double-glass component, including a first glass substrate 1, a battery cell 2, and a second glass substrate 3 arranged in sequence from top to bottom. By arranging the battery cell 2 between the first glass substrate 1 and the second glass substrate 3, the battery cell 2 can be effectively protected.

[0034] In the specific configuration, the second glass substrate 3 is disposed on the first glass substrate 1 along the thickness direction of the first glass substrate 1, and the thickness of the second glass substrate 3 is greater than the thickness of the first glass substrate 1. By setting the thickness of the second glass substrate 3 to be greater than the thickness of the first glass substrate 1, a double-glass component with a different glass thickness structure is formed, and while ensuring the mechanical strength of the second glass substrate 3, the light transmittance of the first glass substrate 1 is increased by thinning the thickness of the first glass substrate 1, thereby effectively reducing the overall weight of the double-glass component while increasing the overall power of the double-glass component, thereby saving the production and transportation costs of the double-glass component and facilitating transportation and installation.

[0035] In addition, the thickness of the first glass substrate 1 is less than or equal to 1.7 mm. Compared with the double-glass component with double 2.0 mm thick encapsulation glass, the double-glass component of the present application has a stronger mechanical strength and impact resistance when the overall thickness is the same, by making the thickness of the first glass substrate 1 less than or equal to 1.7 mm and the thickness of the second glass substrate 3 greater than the thickness of the first glass substrate 1, thereby improving the reliability of use.

[0036] The battery cell 2 is arranged between the first glass substrate 1 and the second glass substrate 3, and a first adhesive film layer 4 is provided between the battery cell 2 and the first glass substrate 1. The first adhesive film layer 4 can be uniformly filled between the battery cell 2 and the first glass substrate 1 after being melted at high temperature and high pressure, so as to bond the battery cell 2 and the first glass substrate 1 together, and play a packaging and protective role for the double-glass component, so that water vapor is not easy to enter the component and affect the circuit of the battery cell 2, and the double-glass component is not easy to have problems such as component delamination during use, thereby extending the service life of the component. A second adhesive film layer 5 is provided between the battery cell 2 and the second glass substrate 3, and the second adhesive film layer 5 can be uniformly filled between the battery cell 2 and the second glass substrate 3 after being melted at high temperature and high pressure, so as to bond the battery cell 2 and the second glass substrate 3 together, and play a packaging and protective role for the double-glass component, so that water vapor is not easy to enter the component and affect the circuit of the battery cell 2, and the double-glass component is not easy to have problems such as component delamination during use, thereby extending the service life of the component. The first adhesive film layer 4 is an EVA adhesive film or a POE adhesive film, and the second adhesive film layer 5 is an EVA adhesive film or a POE adhesive film. The material can have a high light transmittance while ensuring the bonding and fixing effect, thereby ensuring the power generation performance of the photovoltaic module. The length and width of the first glass substrate 1 are the same as the length and width of the second glass substrate 3, and the length and width of the first adhesive film layer 4 are also the same as the length and width of the second adhesive film layer 5, so as to ensure the bonding effect between the battery cell 2 and the first glass substrate 1 and the second glass substrate 3.

[0037] In addition, in one embodiment, the thickness of the first film layer 4 is consistent with the thickness of the second film layer 5, which is convenient for processing and production. In another embodiment, the thickness of the first film layer 4 and the second film layer 5 are both less than the thickness of the first glass substrate 1, and the thickness of the second film layer 5 can be greater than the thickness of the first film layer 4, so that the second film layer 5 with a larger thickness corresponds to the second glass substrate 3 with a lower thickness, ensuring the reliable packaging of the double-glass component. Preferably, the thickness of the first film layer 4 is 0.1 to 0.8 mm, for example, 0.12 mm, 0.15 mm, 0.18 mm, 0.20 mm, 0.25 mm, 0.28 mm, 0.30 mm, 0.35 mm, 0.38 mm, 0.40 mm, 0.45 mm, 0.48 mm, 0.50 mm, 0.55 mm, 0.58 mm, 0.60 mm, 0.65 mm, 0.68 mm, 0.70 mm, 0.75 mm, 0.78 mm, etc. The thickness of the second adhesive film layer 5 is 0.1-0.8 mm, for example, 0.12 mm, 0.15 mm, 0.18 mm, 0.20 mm, 0.25 mm, 0.28 mm, 0.30 mm, 0.35 mm, 0.38 mm, 0.40 mm, 0.45 mm, 0.48 mm, 0.50 mm, 0.55 mm, 0.58 mm, 0.60 mm, 0.65 mm, 0.68 mm, 0.70 mm, 0.75 mm, 0.78 mm, etc.

[0038] In summary, the double-glass component of the present application controls the thickness of the first glass substrate 1 to be less than 1.7 mm and makes the thickness of the second glass substrate 3 greater than the thickness of the first glass substrate 1. This makes it easier to transport and install, ensure the packaging cost, and has stronger mechanical strength and impact resistance, thereby improving the reliability of use, compared to the double 2.0 mm thick packaging glass.

[0039] In one embodiment, the thickness of the second glass substrate 3 is greater than or equal to 2.4 mm. Specifically, the thickness of the first glass substrate 1 is less than or equal to 1.7 mm, the thickness of the second glass substrate 3 is greater than or equal to 2.5 mm, and the ratio of the thickness of the first glass substrate 1 to the thickness of the second glass substrate 3 is in the range of 2.1-3.3. More specifically, the thickness of the first glass substrate 1 is in the range of 1.3 mm-1.7 mm, and the thickness of the second glass substrate 3 is in the range of 2.5 mm-3 mm.

[0040] It can be understood that the ratio of the thickness of the first glass substrate 1 to the thickness of the second glass substrate 3 can be in the range of 2.1, 2.12, 2.15, 2.19, 2.2, 2.22, 2.3, 2.4, 2.5, 2.6, 2.8, 2.9, 3, 3.2 or 3.3. The thickness of the first glass substrate 1 can be 1.3mm, 1.32mm, 1.35mm, 1.38mm, 1.4mm, 1.43mm, 1.35mm, 1.48mm, 1.5mm, 1.52mm, 1.55mm, 1.58mm, 1.6mm, 1.62mm, 1.64mm, 1.65mm, 1.66mm, 1.67mm, 1.69mm or 1.7mm, and the thickness of the second glass substrate 3 can be 2.1, 2.12, 2.15, 2.19, 2.2, 2.22, 2.3, 2.4, 2.5, 2.6, 2.8, 2.9, 3, 3.2 or 3.3. The thickness can be 2.5mm, 2.52mm, 2.54mm, 2.56mm, 2.58mm, 2.6mm, 2.64mm, 2.65mm, 2.68mm, 2.7mm, 2.73mm, 2.74mm, 2.76mm, 2.79mm, 2.8mm, 2.85mm, 2.87mm2.9mm, 2.92mm, 2.95mm, 2.96mm, 2.98mm or 3mm.

[0041] In the embodiment of the present application, the thickness of the first glass substrate 1 is 1.7 mm, and the thickness of the second glass substrate 3 is 2.5 mm. Due to the current glass tempering technology, for glass with a thickness of less than 2.5 mm, the conventional cooling speed cannot achieve full tempering, so the surface stress and mechanical strength of the produced glass are limited by the tempering conditions. The present application enables the second glass substrate 3 to be fully tempered by making the thickness of the second glass substrate 3 greater than or equal to 2.5 mm, thereby ensuring the surface stress and mechanical strength of the second glass substrate 3 and the double glass component. That is, tempered glass is formed by high temperature and quenching, so that the surface layer of the glass forms a strong compressive stress, thereby increasing the mechanical strength of the glass by several times. It has been found through experiments that when the thickness of the glass is less than 2.5 mm, it cannot be quenched at a conventional speed, so that tempered glass cannot be generated. The present application enables the second glass substrate 3 to be fully tempered by making the thickness of the second glass substrate 3 greater than or equal to 2.5 mm, thereby ensuring the surface stress and mechanical strength of the second glass substrate 3 and the double glass component.

[0042] After hail testing on a double-glass component with a first glass substrate 1 having a thickness of 1.7 mm and a second glass substrate 3 having a thickness of 2.5 mm, it was found that it could pass the Φ35 mm hail test. After hail testing on a double-glass component with a double 2.0 mm thick encapsulated glass, it was found that it could only pass the Φ25 mm hail test, because the double-glass component with a first glass substrate 1 having a thickness of 1.7 mm and a second glass substrate 3 having a thickness of 2.5 mm in the present application has better impact resistance.

[0043] In addition, after the static load test was performed on the double-glass component with the first glass substrate 1 having a thickness of 1.7 mm and the second glass substrate 3 having a thickness of 2.5 mm, it was found that it could pass the 6000Pa (downward pressure) / 2700Pa (upward pull) static load test. After the static load test was performed on the double-glass component with double 2.0mm thick encapsulation glass, it was found that it could pass the 5400Pa (downward pressure) / 2400Pa (upward pull) static load test, because the double-glass component with the first glass substrate 1 having a thickness of 1.7 mm and the second glass substrate 3 having a thickness of 2.5 mm of the present application has better mechanical load capacity.

[0044] In one embodiment, the difference in thickness between the first glass substrate 1 and the second glass substrate 3 is 0.8 mm-3 mm. The combination of the first glass substrate 1 and the second glass substrate 3 with inconsistent thicknesses not only ensures the excellent impact resistance and reliability of the double-glass component, making it suitable for harsh environments, but also has obvious cost advantages. The greater the difference in thickness between the thicker second glass substrate 3 and the thinner first glass substrate 1, the better the impact resistance of the double-glass component is improved. However, due to the effect of atmospheric pressure, the thinner first glass substrate 1 also needs to bear the support stress, bending stress and deformation formed by the atmospheric pressure difference. Therefore, the thickness of the first glass substrate 1 cannot be reduced indefinitely. Its thickness value needs to be determined by optimization in combination with the spacing between the supports. Generally, it is more appropriate to choose between 0.8 mm and 3 mm. Specifically, in an embodiment of the present application, the difference in thickness between the first glass substrate 1 and the second glass substrate 3 may be 0.8 mm, 0.86 mm, 0.9 mm, 0.98 mm, 1 mm, 1.2 mm, 11.4 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.6 mm, 2.8 mm or 3 mm.

[0045] The functions of the front glass and back glass in the double-glass assembly are different. The requirement for the front glass is to have a certain mechanical strength to withstand the impact and vibration generated during transportation and installation, and to withstand the pressure of snow and hail impact, etc. The requirement for the back glass is to have good electrical insulation, UV resistance, windproof, waterproof, and isolation from the corrosion of the battery cell 2 under atmospheric conditions.

[0046] According to the different functions of the panel glass and the back glass, in one embodiment, the first glass substrate 1 is the front glass and the second glass substrate 3 is the back glass. By making the thickness of the front glass smaller than that of the back glass, a mounting hole can be opened on the back glass while ensuring the mechanical strength of the double-glass component, so as to lead out the wires of the battery cell 2. In another embodiment, the first glass substrate 1 is the back glass and the second glass substrate 3 is the front glass. By making the thickness of the front glass larger than that of the back glass, while ensuring the mechanical strength of the panel glass, the light transmittance of the back glass is increased by thinning the thickness of the back glass, thereby improving the utilization rate of light energy, and the heat dissipation speed of the back glass with a reduced thickness is fast, so the battery life can be extended, thereby improving the power generation of the double-glass component.

[0047] In one embodiment, the first glass substrate 1 is at least one of float glass or embossed glass, and the second glass substrate 3 is at least one of float glass or embossed glass. Among them, the embossed glass is mainly ultra-white embossed glass, and the float glass is mainly ultra-white processed float glass. The ultra-white embossed glass and the ultra-white processed float glass are both low-iron glasses with high transmittance, with a transmittance of more than 91% and an iron content of less than 120ppm. The double-glass component can protect the solar cells and increase the service life of the photovoltaic component by using ultra-white embossed glass or ultra-white processed float glass. On the other hand, the iron content of ultra-white embossed glass and ultra-white processed float glass is relatively low, and the transmittance is higher, which can improve the power generation efficiency of the photovoltaic component.

[0048] Specifically, the first glass substrate 1 is made of embossed glass, and the back panel glass is made of embossed glass or float glass. Compared with the embossed glass with a patterned surface, the surface of float glass is flatter and smoother than that of embossed glass. By setting the second glass substrate 3 to be float glass, the second adhesive film layer 5 is avoided from being embedded in the second glass substrate 3 of the back panel glass, and the mechanical strength of float glass is better than that of embossed glass. Therefore, the second glass substrate 3 can reduce the thickness of the second adhesive film layer 5 while meeting the mechanical strength requirements, thereby reducing the gram weight of the double-glass component, thereby further reducing the cost.

[0049] That is, since the mechanical strength of the second glass substrate 3 made of float glass is better than that of the first glass substrate 1 made of embossed glass, the gram weight of the first adhesive film layer 4 can be set to be greater than or equal to the gram weight of the second adhesive film layer 5, so that the gram weight of the second adhesive film layer 5 can be reduced while the mechanical strength of the double-glass component can be further improved.

[0050] It is worth mentioning that see Figure 3When the first glass substrate 1 is patterned glass, the bottom surface 12 of the first glass substrate 1 is a plane, and the top surface 11 of the first glass substrate 1 is provided with evenly distributed grooves 13. The thickness of the first glass substrate 1 is the distance between the top surface 11 of the first glass substrate 1 and the bottom surface 12 of the first glass substrate 1. That is, the thickness of the first glass substrate 1 less than or equal to 1.7 mm can be regarded as the distance between the top surface 11 of the first glass substrate 1 and the bottom surface 12 of the first glass substrate 1 is less than or equal to 1.7 mm. The thickness range of the first glass substrate 1 of 1.3 mm-1.7 mm can be regarded as the distance between the top surface 11 of the first glass substrate 1 and the bottom surface 12 of the first glass substrate 1 is in the range of 1.3 mm-1.7 mm. The thickness of the first glass substrate 1 of 1.3 mm, 1.32 mm, 1.35 mm, 1.38 mm, 1.4 mm, 1.43 mm, 1.35 mm, 1.48 mm, 1.5 mm, 1.52 mm, 1.55 mm, 1.58 mm, 1.6 mm, 1.62 mm, 1.64 mm, 1.65 mm, 1.66 mm, 1.67 mm, 1.69 mm or 1.7 mm can be regarded as the top thickness of the first glass substrate 1. The distance between surface 11 and the bottom surface 12 of the first glass substrate 1 is 1.3mm, 1.32mm, 1.35mm, 1.38mm, 1.4mm, 1.43mm, 1.35mm, 1.48mm, 1.5mm, 1.52mm, 1.55mm, 1.58mm, 1.6mm, 1.62mm, 1.64mm, 1.65mm, 1.66mm, 1.67mm, 1.69mm or 1.7mm.

[0051] In addition, when the first glass substrate 1 of embossed glass is used as the front glass, the bottom surface 12 of the first glass substrate 1 is bonded to the battery cell 2 through the first adhesive film layer 4, and the top surface of the first glass substrate 1 can be directly exposed to sunlight. Moreover, since the top surface of the first glass substrate 1 has evenly distributed grooves 13, the first glass substrate 1 can change from specular reflection to diffuse reflection when exposed to sunlight, thereby reducing ambient light pollution.

[0052] In one embodiment, the surface stress of the first glass substrate 1 is greater than or equal to 60 MPa, and the surface stress of the second glass substrate 3 is greater than or equal to 90 MPa. Specifically, the surface stress of the first glass substrate 1 is greater than or equal to 60 MPa and less than or equal to 90 MPa. More specifically, the surface stress of the first glass substrate 1 is greater than or equal to 90 MPa and less than or equal to 150 MPa. The first glass substrate 1 with such stress value can be easily produced while ensuring mechanical strength.

[0053] When measuring the surface stress of the first glass substrate 1, the first glass substrate 1 can be placed on an operating table with a pure black background, and the embossed surface (the side with the grooves 13) of the first glass substrate 1 is facing upward, so that the embossed surface of the first glass substrate 1 does not contact the operating table. After that, multiple test points are set on the embossed surface of the first glass substrate 1, and oil is dripped at each test point for positioning, so that the staff can subsequently place the stress meter according to the oil dripping position, so that the test position of the stress meter coincides with the oil dripping position on the embossed surface of the first glass substrate 1, so that the stress meter reads the stress value at each test point, and then the stress values ​​at each test point can be added and averaged to obtain the surface stress of the first glass substrate 1.

[0054] Among them, the stress meter is a device used for birefringence testing of transparent and weak-color materials. It can detect the birefringence of transparent and weak-color materials, and accurately calculate the birefringence value with an optical path error of no more than 10nm through the Senarmont compensation method. It can detect and analyze the distribution of birefringence through polarized light, and reflect the distribution and size of material stress through the distribution and size of the refractive index.

[0055] Specifically, when light passes through glass, double refraction occurs due to the stress on the glass, that is, the light beam is divided into o-light and e-light. After passing through the polarizer, two groups of bright lines are observed in the imaging element. For light incident at the same angle, there is a slight displacement between the two bright lines, and the magnitude of the displacement is related to the stress on the glass surface. The stress meter irradiates light into the glass to be tested and calculates the displacement of the two bright lines to obtain the stress on the glass surface.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A double-glass component, characterized in that: include: A first glass substrate, wherein the thickness of the first glass substrate is less than or equal to 1.7 mm; a second glass substrate, wherein the second glass substrate is disposed on the first glass substrate along a thickness direction of the first glass substrate, and the thickness of the second glass substrate is greater than the thickness of the first glass substrate; The battery cell is arranged between the first glass substrate and the second glass substrate, and a first adhesive film layer is arranged between the battery cell and the first glass substrate, and a second adhesive film layer is arranged between the battery cell and the second glass substrate.

2. The double-glass assembly according to claim 1, characterized in that: The thickness of the second glass substrate is greater than or equal to 2.4 mm.

3. The double-glass assembly according to claim 1, characterized in that: The thickness of the second glass substrate is greater than or equal to 2.5 mm.

4. The double-glass assembly according to claim 1, characterized in that: The difference in thickness between the first glass substrate and the second glass substrate is 0.8 mm to 3 mm.

5. The double-glass assembly according to claim 1, characterized in that: The first glass substrate is a front glass, and the second glass substrate is a back glass.

6. The double-glass assembly according to claim 1, characterized in that: The first glass substrate is float and / or patterned glass; the second glass substrate is float and / or patterned glass.

7. The double-glass assembly according to claim 1, characterized in that: The surface stress of the first glass substrate is greater than or equal to 60 MPa, and the surface stress of the second glass substrate is greater than or equal to 90 MPa.

8. The double-glass assembly according to claim 7, characterized in that: The surface stress of the first glass substrate is greater than or equal to 60 MPa and less than or equal to 90 MPa.

9. The double-glass assembly according to claim 7, characterized in that: The surface stress of the first glass substrate is greater than or equal to 90 MPa and less than or equal to 150 MPa.

10. The double-glass assembly according to claim 9, characterized in that: The surface stress of the first glass substrate is greater than or equal to 90 MPa and less than or equal to 120 MPa.

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