Back contact type solar cell

Abstract

The utility model relates to the technical field of solar cell panels, in particular to a back contact type solar cell, which comprises a mounting seat, a reflective synergistic mechanism is arranged in the mounting seat and comprises a top plate arranged above the mounting seat, dustproof glass is mounted on the surface of the top plate, a fixing plate is arranged below the dustproof glass, and the fixing plate is arranged below the dustproof glass. The fixing plate is mounted in the mounting seat, a plurality of groups of back contact cell panels are fixedly connected to the surface of the fixing plate, a reflective coating is arranged below the fixing plate and fixedly connected to the bottom wall of the mounting seat, and reflective glass is fixedly connected to the top end of the reflective coating. According to the utility model, through the cooperation of the mounting seat and the reflective synergistic mechanism, sunlight passes through the dustproof glass and the light-transmitting hole to enter the reflective synergistic mechanism by using the light-transmitting hole, and is reflected to the bottom of the fixed plate after being in contact with the reflective coating and the reflective glass; and the shapes of the reflecting glass and the reflecting coating are utilized to cater to sunlight at different angles so as to improve the reflecting efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell panels, in particular to a back-contact solar cell sheet. Background Art

[0002] Solar cells, also known as "solar chips" or "photovoltaic cells," are thin sheets of photovoltaic semiconductors that generate electricity directly from sunlight. As long as they are illuminated by light that meets certain illumination conditions, they can instantly output voltage and generate current in the presence of a circuit. Insulated back-contact (IBC) cells are a high-efficiency cell technology that places all of the cell's electrodes on the back. This placement of the cell's electrodes is beneficial for single-glass modules, increasing the front-side power output. However, for bifacial, double-glass modules currently on the market, the bifaciality ratio is significantly affected.

[0003] After searching, the patent document with publication number CN221125959U proposes a flexible solar cell assembly: This utility model relates to the field of solar cells, and specifically to a flexible solar cell assembly, including two protective sheets, namely an upper protective sheet and a lower protective sheet, which are respectively installed on the upper and lower surfaces of the solar cell, and the top and bottom of the solar cell are respectively installed with a support layer, and a protective layer, which is arranged at the bottom of the lower protective sheet and includes a barrier layer 1 and a barrier layer 2. This utility model overcomes the shortcomings of the existing technology. This utility model adopts an upper protective sheet, a lower protective sheet and a support layer, wherein the upper and lower protective sheets are mainly made of polycarbonate, wherein the top and bottom of the solar cell are provided with a support layer, wherein the support layer is mainly polyester film, which is a flexible base material with low brittleness and can provide certain support and protection when the solar cell is bent or folded.

[0004] During the use of the above technical solution, since the electrodes of the back-contact battery cell are all on the back, and the number of back electrodes is also more than that of conventional bifacial cells, the shading area on the back of the battery cell is larger after welding, affecting the power of the back component.

[0005] Therefore, it is necessary to invent a back-contact solar cell to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a back-contact solar cell, which improves working efficiency by cooperating with a mounting base and a reflective enhancement mechanism, so as to solve the problem in the prior art that the back side of the cell has a large shading area, which affects the power of the back side components.

[0007] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a back-contact solar cell, comprising a mounting base, wherein a reflective efficiency enhancement mechanism is provided inside the mounting base, wherein the reflective efficiency enhancement mechanism comprises a top plate provided above the mounting base, a dustproof glass is installed on the surface of the top plate, a fixing plate is provided below the dustproof glass, the fixing plate is installed inside the mounting base, a plurality of groups of back-contact solar panels are fixedly connected to the surface of the fixing plate, a reflective coating is provided below the fixing plate, the reflective coating is fixedly connected to the bottom wall of the mounting base, and the top of the reflective coating is fixedly connected to the reflective glass, and the reflective coating cooperates with the reflective glass to reflect sunlight to the bottom of the back-contact solar panel, thereby improving its sunlight acceptance rate.

[0008] Preferably, the reflective coating and the reflective glass are both wavy, and light-transmitting holes are provided above the reflective coating and the reflective glass. The light-transmitting holes are opened on the surface of the fixing plate, and the light is brought into contact with the reflective glass by the cooperation of the light-transmitting holes and the fixing plate.

[0009] Preferably, a polyurethane layer is provided on the top and bottom of the back contact solar panel, and two sets of mounting grooves are provided on the surface of the mounting seat. A mounting plate is inserted into the interior of the mounting grooves. The polyurethane layer strengthens the protection of the back contact solar panel, and the connection between the mounting grooves and the mounting plate is reinforced by the cooperation between the mounting grooves and the mounting plate.

[0010] Preferably, the top end of the mounting plate is fixedly connected to the bottom end of the top plate, and transparent dustproof plates are fixedly connected to the bottom ends of both ends of the top plate. The transparent dustproof plates are inserted into the interior of the mounting seat, and the top plate, mounting groove and mounting plate are used together to achieve dust protection for the back-contact solar panel.

[0011] Preferably, a buffer pad is fixedly connected to the bottom end of the mounting seat, and two groups of fixing seats are fixedly connected to the inner side wall of the mounting seat, so that the protection of the mounting seat is improved by the buffer pad.

[0012] Preferably, the internal thread of the fixing seat is connected with a fixing bolt, and the fixing bolt is simultaneously threadedly connected to the fixing plate and the top plate, and the installation of the reflective enhancement mechanism is achieved by utilizing the cooperation between the fixing seat and the fixing bolt.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] 1. Through the cooperation between the mounting base and the reflective enhancement mechanism, sunlight is allowed to pass through the dust-proof glass and the light-transmitting hole into the interior of the reflective enhancement mechanism. After contacting the reflective coating and the reflective glass, the sunlight is reflected to the bottom of the fixing plate, thereby improving the working efficiency of the back-contact solar panel. The shape of the reflective glass and the reflective coating is used to cater to sunlight at different angles to improve the reflection efficiency.

[0015] 2. By combining parts such as the cushion pad and the mounting groove, the polyurethane layer is used to strengthen the protection of the back-contact solar panel, thereby improving the back-contact solar panel's resistance to bending or folding. The combination of the mounting groove and the mounting plate enhances the stability and dustproofness of the structure, while the cushion pad protects the entire mounting base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 For the utility model Figure 1 A in the middle is an enlarged structural diagram;

[0020] Figure 4 For the utility model Figure 2 Enlarged structural diagram at point B in the middle.

[0021] Description of reference numerals:

[0022] 1. Mounting base; 2. Reflective enhancement mechanism; 201. Top plate; 202. Dustproof glass; 203. Fixing plate; 204. Reflective coating; 205. Reflective glass; 206. Back contact solar panel; 207. Light-transmitting hole; 3. Fixing bolts; 4. Fixing base; 5. Buffer pad; 6. Mounting slot; 7. Mounting plate; 8. Transparent dustproof plate. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] The utility model provides Figure 1-4A back-contact solar cell shown in FIG. 1 includes a mounting base 1, wherein a reflective enhancement mechanism 2 is provided inside the mounting base 1. The reflective enhancement mechanism 2 includes a top plate 201 provided above the mounting base 1, and the top plate 201 provides protection for subsequent components. A dustproof glass 202 is installed on the surface of the top plate 201 to allow sunlight to enter the interior of the reflective enhancement mechanism 2. A fixing plate 203 is provided below the dustproof glass 202, and the fixing plate 203 is installed inside the mounting base 1. A plurality of groups of back-contact solar panels 206 are fixedly connected to the surface of the fixing plate 203. A reflective coating 204 is provided below the fixing plate 203, and the reflective coating 204 is fixedly connected to the bottom wall of the mounting base 1. A reflective glass 205 is fixedly connected to the top of the reflective coating 204. The reflective coating 204 cooperates with the reflective glass 205 to reflect sunlight to the The back contact solar panel 206 is located below the back contact solar panel 206, thereby improving its sunlight acceptance rate. The reflective coating 204 and the reflective glass 205 are both wavy. A light-transmitting hole 207 is provided above the reflective coating 204 and the reflective glass 205. The light-transmitting hole 207 is opened on the surface of the fixing plate 203. The light-transmitting hole 207 cooperates with the fixing plate 203 to allow the sun to contact the reflective glass 205. Through the cooperation between the mounting base 1 and the reflective enhancement mechanism 2, the light-transmitting hole 207 allows sunlight to pass through the dust-proof glass 202 and the light-transmitting hole 207 and enter the interior of the reflective enhancement mechanism 2. After contacting the reflective coating 204 and the reflective glass 205, it is reflected to the bottom of the fixing plate 203, thereby improving the working efficiency of the back contact solar panel 206. The shapes of the reflective glass 205 and the reflective coating 204 cater to sunlight at different angles to improve reflection efficiency.

[0025] Refer to the instruction manual Figure 1-4, the top and bottom of the back contact solar panel 206 are both provided with a polyurethane layer, and two sets of mounting grooves 6 are opened on the surface of the mounting base 1. The mounting plates 7 are inserted into the interior of the mounting grooves 6. The polyurethane layer strengthens the protection of the back contact solar panel 206. The connection between the mounting grooves 6 and the mounting plates 7 is strengthened by the cooperation between the mounting grooves 6 and the mounting plates 7. The top of the mounting plate 7 is fixedly connected to the bottom of the top plate 201. The bottoms of both ends of the top plate 201 are fixedly connected with transparent dustproof plates 8. The transparent dustproof plates 8 are inserted into the interior of the mounting base 1. The top plate 201, the mounting grooves 6, and the mounting plates 7 are used together to realize dustproofing of the back contact solar panel 206. The bottom of the mounting base 1 is fixedly connected with a buffer pad 5. Two sets of fixing seats 4 are fixedly connected to the inner wall of the seat 1, and the protection of the mounting seat 1 is improved by the buffer pad 5. The internal thread of the fixing seat 4 is connected to the fixing bolt 3, and the fixing bolt 3 is threadedly connected to the fixing plate 203 and the top plate 201 at the same time. The installation of the reflective enhancement mechanism 2 is achieved by the cooperation of the fixing seat 4 and the fixing bolt 3. Through the cooperation of parts such as the buffer pad 5 and the mounting groove 6, the polyurethane layer is used to strengthen the protection of the back contact solar panel 206, improve the resistance of the back contact solar panel 206 to bending or folding, and the cooperation of the mounting groove 6 and the mounting plate 7 is used to enhance the stability and dustproofness of the structure. At the same time, the mounting seat 1 as a whole is protected by the buffer pad 5.

[0026] This utility works as follows:

[0027] Refer to the instruction manual Figure 1-4 When the back-contact solar panel 206 is working, the fixing plate 203 is first aligned with the fixing seat 4, and the mounting plate 7 is inserted into the interior of the mounting groove 6. After the transparent dustproof plate 8 is inserted into the interior of the mounting seat 1, the fixing bolt 3 is rotated to connect the three. The upper and lower polyurethane layers of the back-contact solar panel 206 are used to strengthen the protection of the back-contact solar panel 206 and improve the resistance of the back-contact solar panel 206 to bending or folding. The cooperation between the mounting groove 6 and the mounting plate 7 strengthens the stability and dustproofness of the structure. At the same time, the buffer pad 5 protects the entire mounting seat 1. When the back-contact solar panel 206 is working, the light-transmitting hole 207 is used to allow sunlight to pass through the dustproof glass 202 and the light-transmitting hole 207 and enter the interior of the reflective enhancement mechanism 2. After contacting the reflective coating 204 and the reflective glass 205, it is reflected to the bottom of the fixing plate 203, thereby improving the working efficiency of the back-contact solar panel 206. The shapes of the reflective glass 205 and the reflective coating 204 cater to sunlight at different angles to improve reflection efficiency.

[0028] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A back-contact solar cell comprising a mounting base (1), characterized in that: A reflective enhancement mechanism (2) is provided inside the mounting seat (1), and the reflective enhancement mechanism (2) comprises a top plate (201) provided above the mounting seat (1), a dustproof glass (202) being provided on the surface of the top plate (201), a fixing plate (203) being provided below the dustproof glass (202), the fixing plate (203) being installed inside the mounting seat (1), a plurality of groups of back-contact solar panels (206) being fixedly connected to the surface of the fixing plate (203), a reflective coating (204) being provided below the fixing plate (203), the reflective coating (204) being fixedly connected to the bottom wall of the mounting seat (1), and a reflective glass (205) being fixedly connected to the top of the reflective coating (204).

2. The back-contact solar cell according to claim 1, characterized in that: The reflective coating (204) and the reflective glass (205) are both wavy, and a light-transmitting hole (207) is provided above the reflective coating (204) and the reflective glass (205). The light-transmitting hole (207) is opened on the surface of the fixing plate (203).

3. The back-contact solar cell according to claim 1, characterized in that: The top and bottom of the back contact solar panel (206) are both provided with a polyurethane layer, and the surface of the mounting seat (1) is provided with two groups of mounting grooves (6), and the interiors of the mounting grooves (6) are plugged with mounting plates (7).

4. The back-contact solar cell according to claim 3, characterized in that: The top end of the mounting plate (7) is fixedly connected to the bottom end of the top plate (201), and the bottom ends of both ends of the top plate (201) are fixedly connected to transparent dustproof plates (8), and the transparent dustproof plates (8) are inserted into the interior of the mounting seat (1).

5. The back-contact solar cell according to claim 1, characterized in that: The bottom end of the mounting seat (1) is fixedly connected to a buffer pad (5), and the inner side wall of the mounting seat (1) is fixedly connected to two groups of fixing seats (4).

6. The back-contact solar cell according to claim 5, characterized in that: The internal thread of the fixing seat (4) is connected to a fixing bolt (3), and the fixing bolt (3) is simultaneously threadedly connected to the fixing plate (203) and the top plate (201).

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