Double-sided solar power generation glass and preparation method thereof

Abstract

The invention relates to the field of preparation of power generation glass, and particularly discloses double-sided solar power generation glass and a preparation method thereof.The power generation glass can be obtained by assembling and processing two film type photovoltaic cells according to a specific product structure; the comprehensive utilization rate of solar energy can be effectively improved, thereby improving the power generation efficiency. Meanwhile, by specifically adjusting the thickness relation of the adhesive film layer, the first drainage-confluence pasting layer and the second drainage-confluence pasting layer and parameters of high-pressure kettle pressing treatment, the prepared double-sided solar power generation glass has high yield and heat resistance, the product quality is good, and mass production can be achieved. The preparation method is simple to operate, has high yield and heat resistance, can realize mass production, and is convenient for popularization and application.

Description

Technical Field

[0001] The invention relates to the field of preparation of power generation glass, and specifically designs a double-sided solar power generation glass and a preparation method thereof. Background Art

[0002] With the promotion and application of photovoltaic building integration (BIPV), solar power generation glass has become a new highlight of public buildings. It is mainly formed by implanting photovoltaic power generation chips on the basis of traditional building glass to form solar power generation glass for buildings, namely BIPV glass. Solar cells mainly include monocrystalline silicon and polycrystalline silicon cells, cadmium telluride thin film cells, copper indium gallium selenide thin film cells, perovskite thin film cells, etc. However, due to the low strength of monocrystalline silicon and polycrystalline silicon cells and the inability to make light-transmitting products, it is difficult to be widely used in buildings. At present, cadmium telluride thin film cells, copper indium gallium selenide thin film cells or perovskite thin film cells are mainly implanted in BIPV glass. These thin film cells have the advantages of weak light power generation, light-transmitting processing, stable power generation performance, and suitable for large-format glass processing.

[0003] With the rapid development of BIPV, the application scenarios of solar power generation glass are becoming more and more extensive. In the field of construction, there are a large number of glasses installed in places where light can be received from both sides, such as building roofs, open-air balconies, and guardrail glass of overpass corridors. Most of the glass in these locations has good sunlight reception conditions and can receive light from both sides, which is very suitable for installing two-sided photovoltaic power generation glass.

[0004] However, due to the limitations of production process conditions, it is difficult to form thin-film photovoltaic power generation layers on both sides of the same glass substrate, resulting in no new progress in thin-film two-sided photovoltaic power generation glass.

[0005] Therefore, researching a double-sided solar power generation glass that can be mass-produced and effectively improve power generation efficiency is of great significance to the development of photovoltaic building integration. Summary of the invention

[0006] The purpose of the present invention is to provide a double-sided solar power generation glass and a preparation method thereof in view of the problems existing in the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A double-sided solar power generation glass, comprising a first transparent conductive glass, a first thin-film photovoltaic power generation layer, a first drain-collector pasting layer, a film layer, a second drain-collector pasting layer, a second thin-film photovoltaic power generation layer and a second transparent conductive glass stacked in sequence;

[0009] A first positive and negative lead wire is arranged outwardly along the first draining and collecting coating layer for installing a first photovoltaic junction box;

[0010] A second positive and negative lead wire is arranged outwardly along the second drainage-collection application layer for installing a second photovoltaic junction box.

[0011] The present invention provides a double-sided solar power generation glass, the structure of which comprises a first transparent conductive glass, a first thin-film photovoltaic power generation layer, a first drainage-collecting pasting layer, a film layer, a second drainage-collecting pasting layer, a second thin-film photovoltaic power generation layer and a second transparent conductive glass which are stacked in sequence; a first positive and negative lead wire is arranged outwardly along the first drainage-collecting pasting layer for installing a first photovoltaic junction box; a second positive and negative lead wire is arranged outwardly along the second drainage-collecting pasting layer for installing a second photovoltaic junction box. The present invention uses two thin-film photovoltaic cells, and assembles and processes them according to the above-mentioned specific product structure to obtain double-sided solar power generation glass; wherein, the first drainage-collection coating layer is respectively provided on both sides to lead out the first positive and negative electrode lead wires, and the second drainage-collection coating layer is provided to lead out the second positive and negative electrode lead wires. This combination mode enables the front and back sides of the double-sided power generation glass to be in their respective working states without interfering with each other, and will not generate internal convergence to reduce the output power, thereby maximizing the power generation power of the double-sided power generation glass. The structure is simple, and it is convenient for wide production and application.

[0012] Furthermore, the first transparent conductive glass and the second transparent conductive glass are TCO conductive glass; and / or, the first thin-film photovoltaic power generation layer and the second thin-film photovoltaic power generation layer are cadmium telluride thin-film photovoltaic cells, perovskite thin-film photovoltaic cells or copper indium gallium selenide thin-film photovoltaic cells; and / or, the adhesive film layer is PVB film, EVA film or POE film.

[0013] Furthermore, the first drain-bus coating layer, including the drain layer and the bus layer, is formed by applying insulating tape, conductive tape and tinned copper tape on the back electrode of the thin film battery. The prior art has disclosed this and will not be described in detail here.

[0014] Furthermore, the second drain-bus coating layer, including the drain layer and the bus layer, is formed by applying insulating tape, conductive tape and tinned copper tape on the back electrode of the thin film battery. The prior art has been disclosed and will not be described in detail here.

[0015] Furthermore, the thickness ratio of the first drainage-collecting layer to the second drainage-collecting layer is 0.8 to 1.2:1. The study found that targeted regulation of the thickness ratio of the first drainage-collecting layer can ensure a higher yield rate and heat resistance of the double-sided glass. Preferably, the thickness ratio of the first drainage-collecting layer to the second drainage-collecting layer is 0.9 to 1.1:1.

[0016] Furthermore, the thickness of the adhesive film layer is at least twice the thickness of the thicker layer of the first drain-collector coating layer and the second drain-collector coating layer. The study found that the relationship between the thickness of the adhesive film layer and the thickness of the two drain-collector coating layers is a key factor affecting the yield and heat resistance of the double-sided power generation glass. If the thickness ratio is too small, the yield and heat resistance of the double-sided power generation glass will be reduced.

[0017] Furthermore, the double-sided solar power generation glass is obtained by assembling the rough product, placing the rough product in a vacuum bag, evacuating the vacuum, placing it in an autoclave, and adjusting the temperature and pressure of the autoclave for pressing treatment;

[0018] The temperature and pressure of the autoclave were adjusted as follows:

[0019] The temperature in the autoclave is adjusted to 68°C to 70°C, and then the pressure is adjusted to 0.3 to 0.4Mpa; then a high temperature and high pressure treatment is performed, and finally a temperature reduction and pressure relief treatment is performed.

[0020] In the autoclave, the initial regulation of low temperature and low pressure can enable the air between the glass structures to be discharged well, ensuring a high yield rate and heat resistance of the double-sided power generation glass.

[0021] Further, the specific operating steps for adjusting the temperature and pressure of the autoclave are as follows:

[0022] Step 1, heating to 68°C to 70°C;

[0023] Step 2, the temperature is maintained at 68°C to 70°C, and the pressure is increased to 0.3 to 0.4Mpa;

[0024] Step 3, continue to raise the temperature to 132°C to 134°C, and at the same time, increase the pressure to 1.1 to 1.4 MPa;

[0025] Step 4, maintaining temperature and pressure;

[0026] Step 5: Maintain the pressure and cool down to below 40°C;

[0027] Step 6: Open the exhaust valve of the autoclave to release the pressure, and the pressing process is completed.

[0028] Another object of the present invention is to provide a method for preparing the above-mentioned double-sided solar power generation glass.

[0029] A method for preparing the double-sided solar power generation glass as described above comprises the following steps:

[0030] (1) Preparing the first pre-treated power generation glass substrate:

[0031] Applying the first thin-film photovoltaic power generation layer to the first transparent conductive glass;

[0032] Applying the drain bar and the bus bar on the first thin-film photovoltaic power generation layer to form a first drain-bus application layer, and leading out the first positive and negative lead wires;

[0033] (2) Preparing the second pre-treated power generation glass substrate:

[0034] applying a second thin-film photovoltaic power generation layer onto the second transparent conductive glass;

[0035] Applying the drain bar and the bus bar to the second thin-film photovoltaic power generation layer to form a second drain-bus application layer, and leading out the second positive and negative lead wires;

[0036] (3) applying the adhesive film layer to the first drain-collector pasting layer; and then placing the second drain-collector pasting layer downward on the adhesive film layer, and assembling to obtain a rough product of double-sided solar power generation glass;

[0037] (4) placing the crude double-sided solar power generation glass in a vacuum bag, evacuating the vacuum, placing it in an autoclave, adjusting the temperature and pressure of the autoclave, and performing a pressing process to obtain the double-sided solar power generation glass.

[0038] The present invention provides a method for preparing double-sided solar power generation glass. First, a pre-treated power generation glass substrate on one side is prepared, and then a pre-treated power generation glass substrate on the other side is prepared. Thereafter, the two pre-treated power generation glass substrates are stacked opposite to each other and assembled into a crude product. Finally, the crude product is placed in a vacuum bag, evacuated, placed in an autoclave, the temperature and pressure of the autoclave are adjusted, and a pressing process is performed to obtain the double-sided solar power generation glass. The preparation method is simple to operate, has a high yield rate and heat resistance, can realize mass production, and is convenient for popularization and application.

[0039] Another object of the present invention is to provide an impact-resistant double-sided solar power generation glass.

[0040] An impact-resistant double-sided solar power generation glass comprises the double-sided solar power generation glass as described above, wherein tempered glass is stacked on the outer sides of the first transparent conductive glass and the second transparent conductive glass respectively.

[0041] The present invention provides an impact-resistant double-sided solar power generation glass, wherein the outermost layer is provided with tempered glass, which can effectively improve the impact resistance of the double-sided solar power generation glass and meet the performance requirements of special fields.

[0042] Furthermore, the double-sided solar power generation glass is obtained by assembling the rough product, placing the rough product in a vacuum bag, evacuating the vacuum, placing it in an autoclave, and adjusting the temperature and pressure of the autoclave for pressing treatment;

[0043] The specific operating steps for adjusting the temperature and pressure of the autoclave are as follows:

[0044] S1, heating to 68℃~70℃;

[0045] S2, the temperature is maintained at 68℃~70℃, and the pressure is increased to 0.3~0.4Mpa;

[0046] S3, maintain the pressure and continue to raise the temperature to 100℃~110℃;

[0047] S4, maintain the temperature and increase the pressure to 0.8-0.9Mpa;

[0048] S5, continue to raise the temperature to 132℃~134℃, and at the same time, increase the pressure to 1.1~1.4Mpa;

[0049] S6. Maintain temperature and pressure;

[0050] S7, maintain pressure and cool down to below 40℃;

[0051] S8. Open the exhaust valve of the autoclave to release the pressure, and the pressing process is completed.

[0052] The present invention specifically adjusts reasonable pressing parameters for the structure of the impact-resistant double-sided solar power generation glass, thereby ensuring the yield rate and heat resistance of the impact-resistant double-sided solar power generation glass.

[0053] Another object of the present invention is to provide a method for preparing the above-mentioned impact-resistant double-sided solar power generation glass.

[0054] A method for preparing the impact-resistant double-sided solar power generation glass as described above comprises the following steps:

[0055] Assembled rough double-sided solar power generation glass products;

[0056] Laying an intermediate adhesive film on the outer sides of the first transparent conductive glass and the second transparent conductive glass respectively;

[0057] Then two pieces of tempered glass are respectively adhered to the intermediate adhesive film to obtain a rough product of impact-resistant double-sided solar power generation glass;

[0058] The crude impact-resistant double-sided solar power generation glass is placed in a vacuum bag to evacuate the vacuum, and then placed in an autoclave. The temperature and pressure of the autoclave are adjusted to perform a pressing process to obtain the impact-resistant double-sided solar power generation glass.

[0059] Furthermore, the intermediate film is a PVB film or an ionic intermediate film. Preferably, the ionic intermediate film is an SGP film.

[0060] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0061] 1. The present invention provides a double-sided solar power generation glass, which comprises a first transparent conductive glass, a first thin-film photovoltaic power generation layer, a first drain-collecting pasting layer, a film layer, a second drain-collecting pasting layer, a second thin-film photovoltaic power generation layer and a second transparent conductive glass stacked in sequence; a first positive and negative lead wire is arranged outwardly along the first drain-collecting pasting layer for installing a first photovoltaic junction box; a second positive and negative lead wire is arranged outwardly along the second drain-collecting pasting layer for installing a second photovoltaic junction box. The present invention uses two thin-film photovoltaic cells, and assembles and processes them according to the above-mentioned specific product structure to obtain double-sided solar power generation glass; wherein, the first drainage-collection coating layer is respectively provided on both sides to lead out the first positive and negative electrode lead wires, and the second drainage-collection coating layer is provided to lead out the second positive and negative electrode lead wires. This combination mode enables the front and back sides of the double-sided power generation glass to be in their respective working states without interfering with each other, and will not generate internal convergence to reduce the output power, thereby maximizing the power generation power of the double-sided power generation glass. The structure is simple, and it is convenient for wide production and application.

[0062] 2. The present invention provides a double-sided solar power generation glass that realizes double-sided light-receiving power generation through a special component packaging structure design, which can effectively improve the comprehensive utilization rate of solar energy, thereby improving power generation efficiency. The product has the advantages of high strength and suitable for large-format processing, and is more suitable for applications in the BIPV field, thereby promoting the promotion and application of solar power generation technology in the construction industry.

[0063] 3. The double-sided solar power generation glass provided by the present invention has a high yield rate and heat resistance, good product quality, and can be mass-produced by targetedly adjusting the thickness relationship between the film layer, the first drainage-collection pasting layer and the second drainage-collection pasting layer, as well as the parameters of the high-pressure autoclave pressing treatment.

[0064] 4. The present invention provides a method for preparing double-sided solar power generation glass. First, a pre-treated power generation glass substrate on one side is prepared, and then a pre-treated power generation glass substrate on the other side is prepared. Thereafter, the two pre-treated power generation glass substrates are stacked opposite to each other and assembled into a crude product. Finally, the crude product is placed in a vacuum bag and evacuated, and then placed in an autoclave. The temperature and pressure of the autoclave are adjusted, and a pressing process is performed to obtain the double-sided solar power generation glass. The preparation method is simple to operate, has a high yield rate and heat resistance, can be mass-produced, and is convenient for promotion and application.

[0065] 5. The present invention provides an impact-resistant double-sided solar power generation glass, the outermost layer of which is provided with tempered glass, which can effectively improve the impact resistance of the double-sided solar power generation glass and meet the performance requirements of special fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 This is a schematic structural diagram of the double-sided solar power generation glass provided by the present invention.

[0067] Figure 2 This is a schematic diagram of the structure of the impact-resistant solar power generation glass provided by the present invention.

[0068] Figure 3 This is a schematic diagram of the installation structure of the impact-resistant solar power generation glass of the present invention.

[0069] Figure 4 for Figure 3 Schematic diagram of the top view structure.

[0070] Icon: 100-double-sided solar power generation glass; 1-first transparent conductive glass 2-first thin-film photovoltaic power generation layer; 3-first drainage-collection pasting layer; 4-film layer; 5-second drainage-collection pasting layer; 6-second thin-film photovoltaic power generation layer; 7-second transparent conductive glass; 8-first positive and negative lead wires; 9-second positive and negative lead wires; 10-tempered glass; 11-intermediate film; 12-photovoltaic junction box. DETAILED DESCRIPTION

[0071] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0072] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0073] Example 1

[0074] like Figure 1 As shown, a double-sided solar power generation glass comprises a first transparent conductive glass 1 (TCO conductive glass), a first thin-film photovoltaic power generation layer 2 (cadmium telluride thin-film photovoltaic cell), a first drain-bus pasting layer 3, an adhesive film layer 4 (PVB film), a second drain-bus pasting layer 5, a second thin-film photovoltaic power generation layer 6 (cadmium telluride thin-film photovoltaic cell) and a second transparent conductive glass 7 (TCO conductive glass) which are stacked in sequence;

[0075] A first positive and negative lead wire 8 is arranged outwardly along the first draining and collecting coating layer 3 for installing a first photovoltaic junction box;

[0076] A second positive and negative lead wire 9 is arranged outwardly along the second draining and collecting coating layer 5 for installing a second photovoltaic junction box.

[0077] The specific preparation process is as follows:

[0078] (1) Preparing the first pre-treated power generation glass substrate:

[0079] Applying a 3.2 μm first thin film photovoltaic power generation layer 2 onto a first transparent conductive glass 1 having a thickness of 3.2 mm;

[0080] The drain bar and the bus bar are attached to the first thin-film photovoltaic power generation layer 2 to form a first drain-bus attachment layer 3 (0.3 mm), and the first positive and negative lead wires 8 are led out;

[0081] (2) Preparing the second pre-treated power generation glass substrate:

[0082] Applying the 3.2 μm second thin film photovoltaic power generation layer 6 onto the 3.2 mm second transparent conductive glass 7;

[0083] The drain bar and the bus bar are attached to the second thin-film photovoltaic power generation layer 6 to form a second drain-bus attachment layer 5 (0.3 mm), and the second positive and negative lead wires 9 are led out;

[0084] (3) applying a film layer 4 (0.92 mm) on the first drain-collector pasting layer 3; then placing a second drain-collector pasting layer 5 downward on the film layer 4, and assembling to obtain a rough product of a double-sided solar power generation glass;

[0085] (4) placing the crude double-sided solar power generation glass in a vacuum bag, evacuating the vacuum, placing it in an autoclave, adjusting the temperature and pressure of the autoclave, and performing a pressing process to obtain the double-sided solar power generation glass.

[0086] Among them, the specific operation method of adjusting the autoclave is as follows:

[0087] The first stage is heating, from room temperature to 69°C, and the heating time is 30 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 69°C, and the pressure increases from zero to 0.35Mpa, and the time is 15 minutes; the third stage is temperature increase and pressure increase, the temperature continues to rise to 133°C, and the pressure is increased to 1.2Mpa, and the time is 45 minutes; the fourth stage is heat preservation and pressure maintenance, the temperature is maintained at 133°C, and the pressure is maintained at 1.2Mpa, and the time is 60 minutes; the fifth stage is pressure maintenance and cooling, the temperature drops to 35°C, and the pressure is maintained at 1.2MPa, and the time is 70 minutes; the sixth stage is pressure relief, the pressure is released by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0088] Example 2

[0089] A double-sided solar power generation glass, comprising a first transparent conductive glass 1 (TCO conductive glass), a first thin-film photovoltaic power generation layer 2 (perovskite thin-film photovoltaic cell), a first drain-collector pasting layer 3, an adhesive film layer 4 (EVA film), a second drain-collector pasting layer 5, a second thin-film photovoltaic power generation layer 6 (perovskite thin-film photovoltaic cell) and a second transparent conductive glass 7 (TCO conductive glass) stacked in sequence;

[0090] A first positive and negative lead wire 8 is arranged outwardly along the first draining and collecting coating layer 3 for installing a first photovoltaic junction box;

[0091] A second positive and negative lead wire 9 is arranged outwardly along the second draining and collecting coating layer 5 for installing a second photovoltaic junction box.

[0092] The specific preparation process is as follows:

[0093] (1) Preparing the first pre-treated power generation glass substrate:

[0094] A 2.8 μm first thin film photovoltaic power generation layer 2 is applied to a first transparent conductive glass 1 having a thickness of 3.0 mm;

[0095] The drain bar and the bus bar are attached to the first thin-film photovoltaic power generation layer 2 to form a first drain-bus attachment layer 3 (0.25 mm), and the first positive and negative lead wires 8 are led out;

[0096] (2) Preparing the second pre-treated power generation glass substrate:

[0097] Applying the 2.8 μm second thin film photovoltaic power generation layer 6 onto the 3.0 mm second transparent conductive glass 7;

[0098] The drain bar and the bus bar are attached to the second thin-film photovoltaic power generation layer 6 to form a second drain-bus attachment layer 5 (0.3 mm), and the second positive and negative lead wires 9 are led out;

[0099] (3) applying a film layer 4 (0.76 mm) on the first drain-collector pasting layer 3; then placing a second drain-collector pasting layer 5 downward on the film layer 4, and assembling to obtain a rough product of a double-sided solar power generation glass;

[0100] (4) placing the crude double-sided solar power generation glass in a vacuum bag, evacuating the vacuum, placing it in an autoclave, adjusting the temperature and pressure of the autoclave, and performing a pressing process to obtain the double-sided solar power generation glass.

[0101] Among them, the specific operation method of adjusting the autoclave is as follows:

[0102] The first stage is heating, from room temperature to 68°C, and the heating time is 40 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 68°C, and the pressure increases from zero to 0.3Mpa, and the time is 20 minutes; the third stage is temperature increase and pressure increase, the temperature continues to rise to 132°C, and the pressure is increased to 1.1Mpa, and the time is 60 minutes; the fourth stage is heat preservation and pressure maintenance, the temperature is maintained at 132°C, and the pressure is maintained at 1.1Mpa, and the time is 60 minutes; the fifth stage is pressure maintenance and cooling, the temperature drops to 30°C, and the pressure is maintained at 1.1MPa, and the time is 90 minutes; the sixth stage is pressure relief, the pressure is released by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0103] Example 3

[0104] A double-sided solar power generation glass, comprising a first transparent conductive glass 1 (TCO conductive glass), a first thin-film photovoltaic power generation layer 2 (copper indium gallium selenide thin-film photovoltaic cell), a first drain-collector pasting layer 3, a glue film layer 4 (POE film), a second drain-collector pasting layer 5, a second thin-film photovoltaic power generation layer 6 (copper indium gallium selenide thin-film photovoltaic cell) and a second transparent conductive glass 7 (TCO conductive glass) stacked in sequence;

[0105] A first positive and negative lead wire 8 is arranged outwardly along the first draining and collecting coating layer 3 for installing a first photovoltaic junction box;

[0106] A second positive and negative lead wire 9 is arranged outwardly along the second draining and collecting coating layer 5 for installing a second photovoltaic junction box.

[0107] The specific preparation process is as follows:

[0108] (1) Preparing the first pre-treated power generation glass substrate:

[0109] A 3 μm first thin film photovoltaic power generation layer 2 is applied to a first transparent conductive glass 1 with a thickness of 3.3 mm;

[0110] The drain bar and the bus bar are attached to the first thin-film photovoltaic power generation layer 2 to form a first drain-bus attachment layer 3 (0.45 mm), and the first positive and negative lead wires 8 are led out;

[0111] (2) Preparing the second pre-treated power generation glass substrate:

[0112] Applying the 3 μm second thin film photovoltaic power generation layer 6 onto the 3.3 mm second transparent conductive glass 7;

[0113] The drain bar and the bus bar are pasted on the second thin-film photovoltaic power generation layer 6 to form a second drain-bus pasting layer 5 (0.5 mm), and the second positive and negative lead wires 9 are led out;

[0114] (3) applying a film layer 4 (1.5 mm) to the first drain-collector pasting layer 3; and then placing a second drain-collector pasting layer 5 downward on the film layer 4 to assemble a rough double-sided solar power generation glass product;

[0115] (4) placing the crude double-sided solar power generation glass in a vacuum bag, evacuating the vacuum, placing it in an autoclave, adjusting the temperature and pressure of the autoclave, and performing a pressing process to obtain the double-sided solar power generation glass.

[0116] Among them, the specific operation method of adjusting the autoclave is as follows:

[0117] The first stage is heating, from room temperature to 70°C, and the heating time is 20 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 70°C, and the pressure increases from zero to 0.4Mpa, and the time is 10 minutes; the third stage is temperature increase and pressure increase, the temperature continues to rise to 134°C, and the pressure is increased to 1.4Mpa, and the time is 30 minutes; the fourth stage is heat preservation and pressure maintenance, the temperature is maintained at 134°C, and the pressure is maintained at 1.4Mpa, and the time is 60 minutes; the fifth stage is pressure maintenance and cooling, the temperature drops to 40°C, and the pressure is maintained at 1.4MPa, and the time is 60 minutes; the sixth stage is pressure relief, the pressure is released by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0118] Example 4

[0119] like Figure 2 As shown, a double-sided solar power generation glass prepared as in Example 1 comprises a first transparent conductive glass 1 (TCO conductive glass), a first thin-film photovoltaic power generation layer 2 (cadmium telluride thin-film photovoltaic cell), a first drain-bus pasting layer 3, an adhesive film layer 4 (PVB film), a second drain-bus pasting layer 5, a second thin-film photovoltaic power generation layer 6 (cadmium telluride thin-film photovoltaic cell) and a second transparent conductive glass 7 (TCO conductive glass) stacked in sequence;

[0120] A first positive and negative lead wire 8 is arranged outwardly along the first draining and collecting coating layer 3 for installing a first photovoltaic junction box;

[0121] A second positive and negative lead wire 9 is arranged outwardly along the second draining and collecting coating layer 5 for installing a second photovoltaic junction box.

[0122] Preparation of an impact-resistant double-sided solar power generation glass:

[0123] The rough product of double-sided solar power generation glass is assembled according to the method of Example 1; the outer sides of the first transparent conductive glass 1 and the second transparent conductive glass 7 are respectively laid with an intermediate adhesive film 11; then two pieces of 6mm tempered glass 10 are respectively adhered to the intermediate adhesive film 11 (DuPont SGP film) to obtain the rough product of impact-resistant double-sided solar power generation glass.

[0124] The crude impact-resistant double-sided solar power generation glass is placed in a vacuum bag to evacuate the vacuum, and then placed in an autoclave. The temperature and pressure of the autoclave are adjusted and pressed to obtain the impact-resistant double-sided solar power generation glass.

[0125] Among them, the specific operation method of adjusting the autoclave is as follows:

[0126] The first stage is heating, from room temperature to 69°C, and the heating time is 30 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 69°C, and the pressure increases from zero to 0.35Mpa, and the time is 15 minutes; the third stage is temperature increase and pressure maintenance, the temperature continues to rise to 105°C, and the pressure is maintained at 0.35MPa, and the time is 30 minutes; the fourth stage is temperature preservation and pressure increase, the temperature is maintained at 105°C, and the pressure continues to increase to 0.8MPa, and the time is 15 minutes; the fifth stage is temperature increase and pressure increase, the temperature continues to rise to 133°C, and the pressure is increased to 1.2Mpa, and the time is 45 minutes; the sixth stage is heat preservation and pressure maintenance, the temperature is maintained at 133°C, and the pressure is maintained at 1.2Mpa, and the time is 60 minutes; the seventh stage is pressure maintenance and cooling, the temperature drops to 35°C, and the pressure is maintained at 1.2MPa, and the time is 70 minutes; the eighth stage is pressure relief, the pressure is relieved by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0127] The study found that without the third and fourth stages, the heat resistance of the double-sided power generation glass prepared in Example 4 did not meet the standard.

[0128] Comparative Example 1

[0129] Compared with Example 1, Comparative Example 1 only adjusts the thickness ratio of the first drain-bus paste layer 3 and the second drain-bus paste layer 5, and the process of adjusting the temperature and pressure of the autoclave is completely consistent with Example 1. The specific operation is as follows:

[0130] A double-sided solar power generation glass, comprising a first transparent conductive glass 1 (TCO conductive glass), a first thin-film photovoltaic power generation layer 2 (cadmium telluride thin-film photovoltaic cell), a first drain-collector pasting layer 3, an adhesive film layer 4 (PVB film), a second drain-collector pasting layer 5, a second thin-film photovoltaic power generation layer 6 (cadmium telluride thin-film photovoltaic cell) and a second transparent conductive glass 7 (TCO conductive glass) stacked in sequence;

[0131] A first positive and negative lead wire 8 is arranged outwardly along the first draining and collecting coating layer 3 for installing a first photovoltaic junction box;

[0132] A second positive and negative lead wire 9 is arranged outwardly along the second draining and collecting coating layer 5 for installing a second photovoltaic junction box.

[0133] The specific preparation process is as follows:

[0134] (1) Preparing the first pre-treated power generation glass substrate:

[0135] Applying a 3.2 μm first thin film photovoltaic power generation layer 2 onto a first transparent conductive glass 1 having a thickness of 3.2 mm;

[0136] The drain bar and the bus bar are attached to the first thin-film photovoltaic power generation layer 2 to form a first drain-bus attachment layer 3 (0.1 mm), and the first positive and negative lead wires 8 are led out;

[0137] (2) Preparing the second pre-treated power generation glass substrate:

[0138] Applying the 3.2 μm second thin film photovoltaic power generation layer 6 onto the 3.2 mm second transparent conductive glass 7;

[0139] The drain bar and the bus bar are attached to the second thin-film photovoltaic power generation layer 6 to form a second drain-bus attachment layer 5 (0.4 mm), and the second positive and negative lead wires 9 are led out;

[0140] (3) applying a film layer 4 (0.92 mm) on the first drain-collector pasting layer 3; then placing a second drain-collector pasting layer 5 downward on the film layer 4, and assembling to obtain a rough product of a double-sided solar power generation glass;

[0141] (4) placing the crude double-sided solar power generation glass in a vacuum bag, evacuating the vacuum, placing it in an autoclave, adjusting the temperature and pressure of the autoclave, and performing a pressing process to obtain the double-sided solar power generation glass.

[0142] Comparative Example 2

[0143] In Comparative Example 2, compared with Example 1, only the thickness of the adhesive film layer 4 is changed, and the process of adjusting the temperature and pressure of the autoclave is completely consistent with that of Example 1. The specific operation is as follows:

[0144] A double-sided solar power generation glass, comprising a first transparent conductive glass 1 (TCO conductive glass), a first thin-film photovoltaic power generation layer 2 (cadmium telluride thin-film photovoltaic cell), a first drain-collector pasting layer 3, an adhesive film layer 4 (PVB film), a second drain-collector pasting layer 5, a second thin-film photovoltaic power generation layer 6 (cadmium telluride thin-film photovoltaic cell) and a second transparent conductive glass 7 (TCO conductive glass) stacked in sequence;

[0145] A first positive and negative lead wire 8 is arranged outwardly along the first draining and collecting coating layer 3 for installing a first photovoltaic junction box;

[0146] A second positive and negative lead wire 9 is arranged outwardly along the second draining and collecting coating layer 5 for installing a second photovoltaic junction box.

[0147] The specific preparation process is as follows:

[0148] (1) Preparing the first pre-treated power generation glass substrate:

[0149] Applying a 3.2 μm first thin film photovoltaic power generation layer 2 onto a first transparent conductive glass 1 having a thickness of 3.2 mm;

[0150] The drain bar and the bus bar are attached to the first thin-film photovoltaic power generation layer 2 to form a first drain-bus attachment layer 3 (0.3 mm), and the first positive and negative lead wires 8 are led out;

[0151] (2) Preparing the second pre-treated power generation glass substrate:

[0152] Applying the 3.2 μm second thin film photovoltaic power generation layer 6 onto the 3.2 mm second transparent conductive glass 7;

[0153] The drain bar and the bus bar are attached to the second thin-film photovoltaic power generation layer 6 to form a second drain-bus attachment layer 5 (0.3 mm), and the second positive and negative lead wires 9 are led out;

[0154] (3) applying the adhesive film layer 4 to the first drain-collector pasting layer 3; and then placing the second drain-collector pasting layer 5 downward on the adhesive film layer 4, and assembling to obtain a rough product of a double-sided solar power generation glass;

[0155] (4) placing the crude double-sided solar power generation glass in a vacuum bag, evacuating the vacuum, placing it in an autoclave, adjusting the temperature and pressure of the autoclave, and performing a pressing process to obtain the double-sided solar power generation glass.

[0156] In comparative example 2-1, the thickness of the adhesive film layer 4 is set to 0.38 mm.

[0157] In comparative example 2-2, the thickness of the adhesive film layer 4 is set to 0.5 mm.

[0158] Comparative Example 3

[0159] Compared with Example 1, Comparative Example 3 changed the adjustment method of the temperature and pressure in the reactor. The structure and preparation process were completely consistent with Example 1. The specific operation of adjusting the temperature and pressure of the autoclave was as follows:

[0160] The first stage is to increase the temperature and pressure from room temperature to 133°C and the pressure to 1.2Mpa for 45 minutes; the second stage is to keep the temperature and pressure, maintain the temperature at 133°C and the pressure at 1.2Mpa for 60 minutes; the third stage is to maintain the pressure and reduce the temperature, drop to 35°C and maintain the pressure at 1.2MPa for 70 minutes; the fourth stage is to release the pressure, open the exhaust valve of the autoclave to release the pressure and open the autoclave door.

[0161] Comparative Example 4

[0162] Compared with Example 1, Comparative Example 4 changed the adjustment method of the temperature and pressure in the reactor. The structure and preparation process were completely consistent with Example 1. The specific operation of adjusting the temperature and pressure of the autoclave was as follows:

[0163] The first stage is heating, from room temperature to 69°C, and the heating time is 30 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 69°C, and the pressure increases from zero to 0.35Mpa, and the time is 15 minutes; the third stage is temperature increase and pressure maintenance, the temperature continues to rise to 105°C, and the pressure is maintained at 0.35MPa, and the time is 30 minutes; the fourth stage is temperature preservation and pressure increase, the temperature is maintained at 105°C, and the pressure continues to increase to 0.8MPa, and the time is 15 minutes; the fifth stage is temperature increase and pressure increase, the temperature continues to rise to 133°C, and the pressure is increased to 1.2Mpa, and the time is 45 minutes; the sixth stage is heat preservation and pressure maintenance, the temperature is maintained at 133°C, and the pressure is maintained at 1.2Mpa, and the time is 60 minutes; the seventh stage is pressure maintenance and cooling, the temperature drops to 35°C, and the pressure is maintained at 1.2MPa, and the time is 70 minutes; the eighth stage is pressure relief, the pressure is relieved by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0164] Comparative Example 5

[0165] Compared with Example 1, Comparative Example 5 changed the temperature adjustment method in the reactor. The structure and preparation process were completely consistent with Example 1. The specific operation of adjusting the temperature and pressure of the autoclave was as follows:

[0166] The first stage is heating, from room temperature to 65°C, and the heating time is 30 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 65°C, and the pressure increases from zero to 0.35Mpa, and the time is 15 minutes; the third stage is temperature increase and pressure increase, the temperature continues to rise to 133°C, and the pressure is increased to 1.2Mpa, and the time is 45 minutes; the fourth stage is heat preservation and pressure maintenance, the temperature is maintained at 133°C, and the pressure is maintained at 1.2Mpa, and the time is 60 minutes; the fifth stage is pressure maintenance and cooling, the temperature drops to 35°C, and the pressure is maintained at 1.2MPa, and the time is 70 minutes; the sixth stage is pressure relief, the pressure is released by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0167] Comparative Example 6

[0168] Compared with Example 1, Comparative Example 6 changed the temperature adjustment method in the reactor, and the structure and preparation process were completely consistent with Example 1. The specific operation of adjusting the temperature and pressure of the autoclave was as follows:

[0169] The first stage is heating, from room temperature to 75°C, and the heating time is 30 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 75°C, and the pressure increases from zero to 0.35Mpa, and the time is 15 minutes; the third stage is temperature increase and pressure increase, the temperature continues to rise to 133°C, and the pressure is increased to 1.2Mpa, and the time is 45 minutes; the fourth stage is heat preservation and pressure maintenance, the temperature is maintained at 133°C, and the pressure is maintained at 1.2Mpa, and the time is 60 minutes; the fifth stage is pressure maintenance and cooling, the temperature drops to 35°C, and the pressure is maintained at 1.2MPa, and the time is 70 minutes; the sixth stage is pressure relief, the pressure is released by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0170] Comparative Example 7

[0171] Compared with Example 1, Comparative Example 7 changed the pressure adjustment method, and the structure and preparation process were completely consistent with Example 1. The specific operation of adjusting the temperature and pressure of the autoclave was as follows:

[0172] The first stage is heating, from room temperature to 69°C, and the heating time is 30 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 69°C, and the pressure increases from zero to 0.8Mpa, and the time is 15 minutes; the third stage is temperature increase and pressure increase, the temperature continues to rise to 133°C, and the pressure is increased to 1.2Mpa, and the time is 45 minutes; the fourth stage is heat preservation and pressure maintenance, the temperature is maintained at 133°C, and the pressure is maintained at 1.2Mpa, and the time is 60 minutes; the fifth stage is pressure maintenance and cooling, the temperature drops to 35°C, and the pressure is maintained at 1.2MPa, and the time is 70 minutes; the sixth stage is pressure relief, the pressure is released by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0173] Comparative Example 8

[0174] Compared with Example 1, Comparative Example 8 changed the pressure adjustment method, and the structure and preparation process were completely consistent with Example 1. The specific operation of adjusting the temperature and pressure of the autoclave was as follows:

[0175] The first stage is heating, from room temperature to 69°C, and the heating time is 30 minutes; the second stage is heat preservation and pressure increase, the temperature is maintained at 69°C, the pressure is maintained at 0MPa, and the time is 15 minutes; the third stage is temperature increase and pressure increase, the temperature continues to rise to 133°C, and the pressure is increased to 1.2Mpa, and the time is 45 minutes; the fourth stage is heat preservation and pressure maintenance, the temperature is maintained at 133°C, and the pressure is maintained at 1.2Mpa, and the time is 60 minutes; the fifth stage is pressure maintenance and cooling, the temperature drops to 35°C, and the pressure is maintained at 1.2MPa, and the time is 70 minutes; the sixth stage is pressure relief, the pressure is released by opening the exhaust valve of the autoclave to relieve the pressure, and the autoclave door is opened.

[0176] test

[0177] For the power generation glass prepared in Examples 1 to 4 and Comparative Examples 1 to 8, 60 samples were prepared respectively, and the yield rate was recorded (good appearance, no bubbles, no cracks, considered as good products), and 10 samples of the products with good appearance were selected and subjected to heat resistance test with reference to GB15763.3-2009.

[0178] The criterion for judging whether the heat resistance is qualified is that no bubbles appear in the double-sided power generation glass at 100°C for 2 hours.

[0179] Ten pieces of the power generation glass prepared in Example 4 with good appearance were selected and subjected to a falling ball impact peeling test in accordance with GB 15763.3-2009. The test results are shown in Table 1.

[0180] Table 1

[0181] / Yield rate (%) Heat resistance Impact resistance Example 1 100 All qualified / Example 2 100 All qualified / Example 3 100 All qualified / Example 4 100 All qualified All qualified Comparative Example 1 80 5 Failed / Comparative Example 2-1 75 All failed / Comparative Example 2-2 90 All failed / Comparative Example 3 60 qualified / Comparative Example 4 90 4 pieces failed / Comparative Example 5 80 6 pieces failed / Comparative Example 6 85 7 pieces failed / Comparative Example 7 60 All qualified / Comparative Example 8 90 All failed /

[0182] The double-sided solar power generation glass provided by the present invention has a high yield rate and heat resistance, good product quality, and can be mass-produced by targetedly adjusting the thickness relationship between the adhesive film layer, the first drainage-collection pasting layer and the second drainage-collection pasting layer, as well as the parameters of the high-pressure autoclave pressing treatment.

[0183] like Figure 3 and Figure 4 As shown, the first positive and negative lead wires 8 and the second positive and negative lead wires 9 are located at different sides or positions of the product, and the photovoltaic junction box 12 is installed.

[0184] According to tests, compared with the existing single-sided cadmium telluride BIPV glass, the present invention can realize the double-sided power generation function, and the power generation efficiency of the product is greatly improved, and the power generation power is increased by 10-20%. Under the condition of fixed vertical installation, the double-sided power generation glass receives relatively more sunlight energy, and the power generation throughout the day can be increased by 50-70%. The multi-layer composite structure and the introduction of SGP high-strength adhesive film have greatly improved the safety strength of BIPV glass, making it better suitable for various installation parts of buildings.

[0185] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sided solar power generation glass, characterized in that: It includes a first transparent conductive glass, a first thin-film photovoltaic power generation layer, a first drain-collector pasting layer, a film layer, a second drain-collector pasting layer, a second thin-film photovoltaic power generation layer and a second transparent conductive glass which are stacked in sequence; A first positive and negative lead wire is arranged outwardly along the first draining and collecting coating layer for installing a first photovoltaic junction box; A second positive and negative lead wire is arranged outwardly along the second drainage-collection application layer for installing a second photovoltaic junction box.

2. The double-sided solar power generation glass according to claim 1, characterized in that: The first transparent conductive glass and the second transparent conductive glass are TCO conductive glass; and / or, the first thin-film photovoltaic power generation layer and the second thin-film photovoltaic power generation layer are cadmium telluride thin-film photovoltaic cells, perovskite thin-film photovoltaic cells or copper indium gallium selenide thin-film photovoltaic cells; and / or, the adhesive film layer is PVB film, EVA film or POE film.

3. The double-sided solar power generation glass according to claim 1, characterized in that: The thickness ratio of the first drain-bus paste layer to the second drain-bus paste layer is 0.8-1.2:

1.

4. The double-sided solar power generation glass according to claim 3, characterized in that: The thickness of the adhesive film layer is at least twice the thickness of the thicker layer of the first drain-bus paste layer and the second drain-bus paste layer.

5. The double-sided solar power generation glass according to claim 1, characterized in that: The double-sided solar power generation glass is obtained by assembling the rough product, placing the rough product in a vacuum bag, evacuating the vacuum, placing it in an autoclave, and adjusting the temperature and pressure of the autoclave for pressing treatment; The temperature and pressure of the autoclave were adjusted as follows: The temperature in the autoclave is adjusted to 68°C to 70°C, and then the pressure is adjusted to 0.3 to 0.4 Mpa; then a high temperature and high pressure treatment is performed, and finally a temperature reduction and pressure relief treatment is performed.

6. The double-sided solar power generation glass according to claim 5, characterized in that: The specific operating steps for adjusting the temperature and pressure of the autoclave are as follows: Step 1, heating to 68°C to 70°C; Step 2, the temperature is maintained at 68°C to 70°C, and the pressure is increased to 0.3 to 0.4 Mpa; Step 3, continue to raise the temperature to 132°C to 134°C, and at the same time, increase the pressure to 1.1 to 1.4 MPa; Step 4, maintaining temperature and pressure; Step 5: Maintain the pressure and cool down to below 40°C; Step 6: Open the exhaust valve of the autoclave to release the pressure, and the pressing process is completed.

7. A method for preparing double-sided solar power generation glass according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Preparing the first pre-treated power generation glass substrate: Applying the first thin-film photovoltaic power generation layer to the first transparent conductive glass; Applying the drain bar and the bus bar on the first thin-film photovoltaic power generation layer to form a first drain-bus application layer, and leading out the first positive and negative lead wires; (2) Preparing the second pre-treated power generation glass substrate: applying a second thin-film photovoltaic power generation layer onto the second transparent conductive glass; Applying the drain bar and the bus bar on the second thin-film photovoltaic power generation layer to form a second drain-bus application layer, and leading out the second positive and negative lead wires; (3) applying the adhesive film layer to the first drain-collector pasting layer; and then placing the second drain-collector pasting layer downward on the adhesive film layer, and assembling to obtain a rough product of a double-sided solar power generation glass; (4) The crude double-sided solar power generation glass is placed in a vacuum bag, evacuated, and placed in an autoclave. The temperature and pressure of the autoclave are adjusted and pressed to obtain the double-sided solar power generation glass.

8. An impact-resistant double-sided solar power generation glass, characterized in that: It comprises the double-sided solar power generation glass as described in any one of claims 1 to 6, and at the same time, tempered glass is stacked on the outer sides of the first transparent conductive glass and the second transparent conductive glass respectively.

9. The impact-resistant double-sided solar power generation glass according to claim 8, characterized in that: The impact-resistant double-sided solar power generation glass is obtained by assembling the rough product, placing the rough product in a vacuum bag, evacuating the vacuum, placing it in an autoclave, and adjusting the temperature and pressure of the autoclave for pressing treatment; The specific operating steps for adjusting the temperature and pressure of the autoclave are as follows: S1, heating to 68℃~70℃; S2, the temperature is maintained at 68℃~70℃, and the pressure is increased to 0.3~0.4Mpa; S3, maintain the pressure and continue to raise the temperature to 100℃~110℃; S4, maintain the temperature and increase the pressure to 0.8-0.9Mpa; S5, continue to raise the temperature to 132℃~134℃, and at the same time, increase the pressure to 1.1~1.4Mpa; S6. Maintain temperature and pressure; S7, maintain pressure and cool down to below 40℃; S8. Open the exhaust valve of the autoclave to release the pressure, and the pressing process is completed.

10. A method for preparing the impact-resistant double-sided solar power generation glass according to any one of claims 8 to 9, characterized in that: The following steps are involved: Assembled rough double-sided solar power generation glass products; Laying an intermediate adhesive film on the outer sides of the first transparent conductive glass and the second transparent conductive glass respectively; Then two pieces of tempered glass are respectively adhered to the intermediate adhesive film to obtain a rough product of impact-resistant double-sided solar power generation glass; The crude impact-resistant double-sided solar power generation glass is placed in a vacuum bag to evacuate the vacuum, and then placed in an autoclave. The temperature and pressure of the autoclave are adjusted to perform a pressing process to obtain the impact-resistant double-sided solar power generation glass.

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