A cadmium telluride hollow power generation glass for back-mounted junction boxes

Abstract

This utility model belongs to the field of cadmium telluride BIPV technology, specifically relating to a cadmium telluride insulated photovoltaic glass for back-connected junction boxes. It includes an outer encapsulation glass layer, with a cadmium telluride power generation chip adhered to one side of the outer encapsulation glass layer, and an inner encapsulation glass layer adhered to the side of the cadmium telluride power generation chip away from the outer encapsulation glass layer. A sealing ring and sealant are used to maintain a seal at the circular hole between the sealing ring and the inner and outer encapsulation glass layers, thus sealing the hollow cavity layer. The positive and negative electrodes of the cadmium telluride power generation chip on the side closest to the inner encapsulation glass layer converge at the circular hole via conductive adhesive strips, and then connect to the junction box through the center of the sealing ring. This allows the back-connected cadmium telluride laminated monolithic product to be combined with the insulated glass product, enabling the cadmium telluride laminated monolithic product to be connected to the junction box while retaining the sound insulation, heat insulation, and thermal insulation functions of the insulated glass product.

Description

Technical Field

[0001] This utility model belongs to the field of cadmium telluride BIPV technology, specifically relating to a cadmium telluride hollow power generation glass for back-connected junction boxes. Background Technology

[0002] Cadmium telluride (CdTe) BIPV sandwich monolithic products are thin-film solar cells using cadmium telluride as the light-absorbing material, sandwiched between two glass sheets using a specific process to form a building material with power generation capabilities. Essentially, it is a photovoltaic device formed by sequentially depositing multiple layers of semiconductor thin films on a glass substrate. It mainly consists of a glass substrate, a transparent conductive oxide (TCO) layer, a cadmium sulfide (CdS) window layer, a cadmium telluride (CdTe) absorber layer, a back contact layer, and a back electrode.

[0003] When installing and using cadmium telluride (CTD) BIPV (Building Integrated Photovoltaic) sandwich monolayers, it is generally necessary to combine them with insulated glass units to form a CTD BIPV sandwich insulated unit, which can provide good heat insulation, sound insulation, and thermal insulation effects for the building interior. Current CTD BIPV sandwich insulated units typically use side-connected junction boxes for wiring. However, because the junction boxes for the photovoltaic glass cannot be pre-embedded within the aluminum frame, back-connected wiring is required in situations where side connections are inconvenient. Currently, there is a lack of insulated glass units that can use back-connected junction boxes. Therefore, CTD BIPV sandwich monolayers are usually directly back-connected to the junction box, making it impossible to effectively integrate the CTD BIPV sandwich and insulated glass units into a single product. This results in higher energy consumption when using single-layer CTD BIPV in certain areas, sacrificing the sound insulation, heat insulation, and thermal insulation effects of the insulated glass units. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a cadmium telluride (CTD) insulated photovoltaic (BIPV) glass for back-mounted junction boxes. This solves the problem that existing CTD BIPV sandwich insulated glass products typically use side-mounted junction boxes for wiring. However, because the junction box for the photovoltaic glass cannot be pre-embedded within the aluminum frame, back-mounted wiring is necessary in situations where side-mounting is inconvenient. Currently, there is a lack of insulated glass products capable of back-mounted junction boxes. Therefore, junction boxes are generally used to directly back-mount single-layer CTD BIPV sandwich products, failing to effectively integrate the CTD BIPV sandwich and insulated glass into a single product. This results in high energy consumption when using single-layer CTD BIPV in certain areas, sacrificing the sound insulation, heat insulation, and thermal insulation properties of the insulated glass.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cadmium telluride hollow power generation glass for a back-connected junction box, comprising an outer encapsulation glass, a cadmium telluride power generation chip adhered to one side of the outer encapsulation glass, an inner encapsulation glass adhered to the side of the cadmium telluride power generation chip away from the outer encapsulation glass, a warm edge strip adhered to the edge of the inner encapsulation glass away from the cadmium telluride power generation chip, and an outer encapsulation glass second layer adhered to the side of the warm edge strip away from the inner encapsulation glass. A hollow cavity layer is formed between the outer encapsulation glass second layer and the inner encapsulation glass on the inner side of the warm edge strip. A circular hole is formed in the middle of the side of the outer encapsulation glass away from the inner encapsulation glass. The circular hole penetrates the outer encapsulation glass to the hollow cavity layer and penetrates the inner encapsulation glass to the side near the cadmium telluride power generation chip. A sealing ring is provided in the hollow cavity layer corresponding to the circular hole. Both ends of the sealing ring are inserted into the inside of the circular hole. The contact surfaces of the sealing ring with the outer encapsulation glass and the inner encapsulation glass are filled with sealant. The insertion surfaces of the sealing ring and the circular hole are filled with sealant. A junction box is fixedly installed on the side of the outer encapsulation glass away from the inner encapsulation glass, opposite the circular hole. A cable connector is connected to the lower side of the junction box.

[0006] The beneficial effects of this utility model are as follows: By using a sealing ring and sealant filling, the connection between the sealing ring and the inner and outer encapsulation glass at the round hole is kept sealed, thus keeping the hollow cavity layer sealed and preventing the filling gas inside the hollow cavity layer from leaking out. The positive and negative electrodes on both sides of the cadmium telluride power generation chip near the inner encapsulation glass are converged at the round hole by attaching conductive adhesive strips, and then connected to the junction box through the center of the sealing ring. This allows the back-connected cadmium telluride sandwich monolithic product to be combined with the glass hollow product, so that while the cadmium telluride sandwich monolithic product is connected to the junction box on the back, it can retain the sound insulation, heat insulation and heat insulation functions of the glass hollow product.

[0007] To enhance the sealing effect of the hollow cavity layer;

[0008] As a further improvement to the above technical solution: a glass outer ring is sleeved on the outside of the sealing ring, and both sides of the glass outer ring are sealed and bonded to the outer encapsulation glass and the inner encapsulation glass.

[0009] The beneficial effect of this improvement is that a sealing protective layer can be formed on the outside of the sealing ring, further increasing the sealing effect on the hollow cavity layer.

[0010] To improve the durability and safety of this device during use;

[0011] As a further improvement to the above technical solution: the outer encapsulation glass one, the inner encapsulation glass and the outer encapsulation glass two are all ice blue tempered homogeneous glass.

[0012] The beneficial effects of this improvement are: the ice-blue tempered homogeneous glass has better overall performance, which can greatly reduce the spontaneous breakage rate and improve the durability and safety of the device during use.

[0013] To greatly increase the energy-saving efficiency of this device;

[0014] As a further improvement to the above technical solution: the outer encapsulation glass has a Low-e coating on one side near the cadmium telluride power generation chip.

[0015] The beneficial effects of this improvement are: the Low-e coating can reflect far-infrared radiation to reduce heat transfer, providing heat insulation in summer and heat preservation in winter, greatly increasing the energy-saving efficiency of this device.

[0016] To greatly increase the robustness and safety of this device;

[0017] As a further improvement to the above technical solution: PVB films are provided on both sides of the cadmium telluride power generation chip, and the cadmium telluride power generation chip is bonded to the outer encapsulation glass and the inner encapsulation glass respectively through the PVB films.

[0018] The beneficial effects of this improvement are: the PVB film has excellent adhesion, impact resistance and weather resistance, which can increase the strength of the connection between the outer encapsulation glass, the cadmium telluride power generation chip and the inner encapsulation glass, and can also effectively stick the fragments when the outer encapsulation glass and the inner encapsulation glass break, thereby greatly increasing the safety of the device.

[0019] In order to reduce the spontaneous breakage rate of the inner encapsulation glass and the outer encapsulation glass II;

[0020] As a further improvement to the above technical solution: the inner side of the hollow cavity layer is filled with argon gas.

[0021] The beneficial effects of this improvement are: it can increase the insulation and heat insulation properties of the hollow cavity layer, and can effectively reduce the spontaneous breakage rate of the inner and outer encapsulated glass.

[0022] To increase the stability of junction box installation and use;

[0023] As a further improvement to the above technical solution: an elastic buffer pad is provided between the junction box and the outer encapsulation glass, and the buffer pad is made of silicone rubber or fluororubber.

[0024] The beneficial effects of this improvement are: the elastic buffer pad can absorb the mechanical stress during installation and use, prevent the junction box from failing to seal due to thermal expansion and contraction or vibration, and enhance the airtightness between the junction box and the glass.

[0025] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a side sectional view of the structure of this utility model;

[0028] Figure 3 This is a structural development diagram of the present invention;

[0029] Figure 4 This is a schematic diagram of the outer encapsulation glass II in this utility model;

[0030] In the diagram: 1. Outer encapsulation glass one; 2. Cadmium telluride power generation chip; 3. Inner encapsulation glass; 4. Warm edge strip; 5. Outer encapsulation glass two; 6. Junction box; 7. Cable connector; 8. Round hole; 9. Sealing ring; 10. Outer glass ring; 11. PVB film. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0032] like Figure 1 — Figure 4As shown: A cadmium telluride hollow power generation glass for back-connected junction boxes includes an outer encapsulation glass 1. A cadmium telluride power generation chip 2 is adhered to one side of the outer encapsulation glass 1. An inner encapsulation glass 3 is adhered to the side of the cadmium telluride power generation chip 2 away from the outer encapsulation glass 1. A warm edge strip 4 is adhered to the edge of the inner encapsulation glass 3 away from the cadmium telluride power generation chip 2. An outer encapsulation glass 2 5 is adhered to the side of the warm edge strip 4 away from the inner encapsulation glass 3. A hollow cavity layer is formed between the outer encapsulation glass 2 5 and the inner encapsulation glass 3 on the inner side of the warm edge strip 4. A circular hole 8 is opened in the middle of the side of the outer encapsulation glass 2 5 away from the inner encapsulation glass 3. The circular hole 8 penetrates the outer encapsulation glass 2 5 into the hollow cavity. In the hollow cavity layer, the circular hole 8 penetrates the inner encapsulation glass 3 to the side near the cadmium telluride power generation chip 2. A sealing ring 9 is provided inside the hollow cavity layer corresponding to the circular hole 8. Both ends of the sealing ring 9 are inserted into the inner side of the circular hole 8. The contact surfaces of the sealing ring 9 with the outer encapsulation glass 5 and the inner encapsulation glass 3 are filled with sealant. The insertion surfaces of the sealing ring 9 and the circular hole 8 are also filled with sealant. A junction box 6 is fixedly installed on the side of the outer encapsulation glass 5 away from the inner encapsulation glass 3, directly opposite the circular hole 8. A cable connector 7 is connected to the lower side of the junction box 6. The sealing ring 9 and sealant ensure a seal between the sealing ring 9 and the inner and outer encapsulation glass 3 and the outer encapsulation glass 5 at the circular hole 8, thus keeping the hollow cavity layer sealed. To prevent the gas filling inside the hollow cavity from leaking out, the positive and negative electrodes of the cadmium telluride (CdT) power generation chip 2, near the inner encapsulation glass 3, converge at the circular hole 8 via conductive adhesive strips. Then, they are connected to the junction box 6 through the center of the sealing ring 9. This allows the back-mounted CdT sandwich monolithic product to be combined with the hollow glass product, maintaining the sound insulation, heat insulation, and thermal insulation functions of the hollow glass product while the CdT sandwich monolithic product is connected to the junction box. A glass outer ring 10 is fitted around the outer side of the sealing ring 9. Both sides of the glass outer ring 10 are sealed and bonded to the outer encapsulation glass 5 and the inner encapsulation glass 3, forming a sealing protective layer on the outside of the sealing ring 9, further enhancing the sealing effect of the hollow cavity layer. The outer encapsulation glass 5... 1. Both the inner encapsulation glass 3 and the outer encapsulation glass 5 are ice-blue tempered homogeneous glass. Ice-blue tempered homogeneous glass has superior overall performance, which can greatly reduce the spontaneous breakage rate and improve the durability and safety of the device during use. The side of the outer encapsulation glass 1 closest to the cadmium telluride power generation chip 2 is treated with a Low-e coating. The Low-e coating can reflect far-infrared radiation to reduce heat transfer, providing heat insulation in summer and heat preservation in winter, greatly increasing the energy-saving efficiency of the device. PVB films 11 are provided on both sides of the cadmium telluride power generation chip 2. The cadmium telluride power generation chip 2 is bonded to the outer encapsulation glass 1 and the inner encapsulation glass 3 respectively through the PVB films 11. The PVB films 11 have excellent adhesion, impact resistance, and weather resistance.This design enhances the bonding strength between the outer encapsulation glass 1, the cadmium telluride power generation chip 2, and the inner encapsulation glass 3. It also effectively holds together fragments even when the outer and inner encapsulation glass 1 and 3 shatter, significantly increasing the device's safety. The hollow cavity layer is filled with argon gas, which improves its thermal insulation properties and effectively reduces the spontaneous breakage rate of the inner and outer encapsulation glass 3 and 5.

[0033] Working principle and usage process of this utility model:

[0034] In use, the outer encapsulation glass 1, the cadmium telluride (CdTe) power generation chip 2, and the inner encapsulation glass 3 form a cadmium telluride sandwich monolithic product. A warm edge strip 4 and the outer encapsulation glass 2 5 are installed together on the side of the inner encapsulation glass 3 to form a hollow glass layer. A circular hole 8 is made in the middle of the inner encapsulation glass 3 and the outer encapsulation glass 2 5, and then a sealing ring 9 and sealant are used to fill the hole. This ensures that the connection between the sealing ring 9 and the inner and outer encapsulation glass 3 and the outer encapsulation glass 2 5 at the circular hole 8 remains sealed, keeping the hollow cavity layer sealed and preventing the filling gas inside the hollow cavity layer from leaking out. The cadmium telluride power generation chip 2 is located close to the inner encapsulation glass 3. The positive and negative electrodes on both sides of one side converge at the circular hole 8 through conductive adhesive strips, and then connect to the junction box 6 through the center of the sealing ring 9. This allows the back-connected cadmium telluride laminated monolayer product to be combined with the glass insulated product. While the cadmium telluride laminated monolayer product is connected to the junction box, it retains the sound insulation, heat insulation and thermal insulation functions of the glass insulated product. In addition, a glass outer ring 10 is sleeved on the outside of the sealing ring 9. Both sides of the glass outer ring 10 are sealed and bonded to the outer encapsulation glass 5 and the inner encapsulation glass 3, forming a sealing protective layer on the outside of the sealing ring 9, further increasing the sealing effect of the hollow cavity layer. Furthermore, the outer encapsulation glass 1, the inner encapsulation glass 3, and the outer encapsulation glass 5 are all ice-blue tempered homogeneous glass. Ice-blue tempered homogeneous glass has superior overall performance, which can greatly reduce the spontaneous breakage rate and improve the durability and safety of the device during use. In addition, the side of the outer encapsulation glass 1 closest to the cadmium telluride power generation chip 2 is treated with a Low-e coating. The Low-e coating can reflect far-infrared radiation to reduce heat transfer, providing heat insulation in summer and heat preservation in winter, greatly increasing the energy-saving efficiency of the device. Furthermore, both sides of the cadmium telluride power generation chip 2 are provided with PVB film 11. 2. PVB film 11 is bonded to the outer encapsulation glass 1 and the inner encapsulation glass 3 respectively. PVB film 11 has excellent adhesion, impact resistance and weather resistance, which can increase the firmness of the connection between the outer encapsulation glass 1, the cadmium telluride power generation chip 2 and the inner encapsulation glass 3. It can also effectively stick the fragments when the outer encapsulation glass 1 and the inner encapsulation glass 3 break, thereby greatly increasing the safety of the device. In addition, the inner side of the hollow cavity layer is filled with argon gas, which can increase the heat insulation and heat insulation performance of the hollow cavity layer, and can effectively reduce the spontaneous explosion rate of the inner encapsulation glass 3 and the outer encapsulation glass 2 5.

[0035] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A cadmium telluride insulated photovoltaic glass for use in back-connected junction boxes, characterized in that: The system includes an outer encapsulation glass (1), on one side of which a cadmium telluride power generation chip (2) is bonded. An inner encapsulation glass (3) is bonded to the side of the cadmium telluride power generation chip (2) away from the outer encapsulation glass (1). A warm edge strip (4) is bonded to the edge of the inner encapsulation glass (3) away from the cadmium telluride power generation chip (2). An outer encapsulation glass (5) is bonded to the side of the warm edge strip (4) away from the inner encapsulation glass (3). A hollow cavity layer is formed between the outer encapsulation glass (5) and the inner encapsulation glass (3) on the inner side of the warm edge strip (4). A circular hole (8) is opened in the middle of the side of the outer encapsulation glass (5) away from the inner encapsulation glass (3). A circular hole (8) penetrates the outer encapsulation glass (5) to the hollow cavity layer. The circular hole (8) penetrates the inner encapsulation glass (3) to the side near the cadmium telluride power generation chip (2). A sealing ring (9) is provided in the hollow cavity layer corresponding to the circular hole (8). Both ends of the sealing ring (9) are inserted into the inside of the circular hole (8). The contact surfaces of the sealing ring (9) with the outer encapsulation glass (5) and the inner encapsulation glass (3) are filled with sealant. The insertion surfaces of the sealing ring (9) and the circular hole (8) are filled with sealant. A junction box (6) is fixedly provided on the side of the outer encapsulation glass (5) away from the inner encapsulation glass (3) opposite to the circular hole (8). A cable connector (7) is connected to the lower side of the junction box (6).

2. The cadmium telluride insulated photovoltaic glass for back-connected junction boxes according to claim 1, characterized in that: A glass outer ring (10) is sleeved on the outside of the sealing ring (9), and both sides of the glass outer ring (10) are sealed and bonded to the outer encapsulation glass (5) and the inner encapsulation glass (3).

3. The cadmium telluride insulated glass for back-connected junction boxes according to claim 1, characterized in that: The outer encapsulation glass one (1), the inner encapsulation glass (3), and the outer encapsulation glass two (5) are all ice blue tempered homogeneous glass.

4. The cadmium telluride insulated glass for back-connected junction boxes according to claim 1, characterized in that: The outer encapsulation glass (1) has a Low-e coating on the side closest to the cadmium telluride power generation chip (2).

5. A cadmium telluride insulated photovoltaic glass for back-connected junction boxes according to claim 1, characterized in that: The cadmium telluride power generation chip (2) has PVB film (11) on both sides, and the cadmium telluride power generation chip (2) is bonded to the outer encapsulation glass (1) and the inner encapsulation glass (3) respectively through the PVB film (11).

6. The cadmium telluride insulated photovoltaic glass for back-connected junction boxes according to claim 1, characterized in that: The inner side of the hollow cavity layer is filled with argon gas.

7. A cadmium telluride insulated photovoltaic glass for back-connected junction boxes according to claim 1, characterized in that: An elastic buffer pad is provided between the junction box (6) and the outer encapsulation glass (5), and the buffer pad is made of silicone rubber or fluororubber.

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