Photovoltaic power generation device of HJT microcrystalline battery

Abstract

The utility model discloses a photovoltaic power generation device of an HJT microcrystalline battery, and the device comprises a battery packaging layer which comprises a front glue film layer, an HJT battery layer and a back glue film layer, the light-transmitting shell comprises a light-transmitting cover, a back light-transmitting plate and an elastic sealing frame, the back light-transmitting plate is arranged on the face, back to the HJT battery layer, of the back adhesive film layer, the light-transmitting cover is connected with the back light-transmitting plate in a sealed mode through the sealing frame and defines an isolation cavity, and the battery packaging layer is arranged in the isolation cavity; and the sealing fastening assembly is used for fastening and connecting the light-transmitting cover and the sealing frame. According to the photovoltaic power generation device of the HJT microcrystalline battery, the light-transmitting cover and the back light-transmitting plate are connected in a fastened mode through the sealing fastening assembly, an isolation cavity of the light-transmitting shell is formed, the internal battery packaging layer is protected, only the sealing frames need to be arranged on the back face of the battery packaging layer, the number of the sealing frames is reduced, and meanwhile the good waterproof sealing performance of the photovoltaic assembly is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of HJT photovoltaic power generation, in particular to a photovoltaic power generation device of an HJT microcrystalline cell. Background Art

[0002] HJT microcrystalline cells use N-type monocrystalline silicon as a substrate, with silicon-based thin film stacks and transparent conductive films deposited on the front and back surfaces with different properties. They can generate electricity on both sides and have good weak light effects, thus ensuring the high photoelectric conversion efficiency of HJT microcrystalline cells.

[0003] However, HJT cells are extremely sensitive to water vapor. If water vapor penetrates into the HJT module, the performance of the cell will drop sharply or even fail. The existing photovoltaic module packaging structure usually uses angle brackets to connect multiple frame profiles end to end in sequence to form a closed frame structure. Rubber strips are provided at the connection parts between the frame profile and the front glass plate and the back glass plate. The rubber strips on the front and back are connected end to end in sequence to form a sealing frame. With the above sealing structure, it is necessary to provide sealing rubber strips on both the front and back of the photovoltaic module, which increases the number of sealing rubber strips and thus the cost. The sealing position between the photovoltaic module and the frame profile exists on both the front and back sides of the photovoltaic module, which increases the risk of water vapor penetration. In addition, the frame profile is usually provided with an assembly groove for inserting the photovoltaic module and an assembly cavity for inserting the angle bracket, which makes the structure of the frame profile complex and requires the use of more materials, further increasing the overall weight of the photovoltaic module, thereby increasing the production and transportation related costs and increasing the difficulty of installation.

[0004] Therefore, it is necessary to improve the photovoltaic power generation device of the HJT microcrystalline cell in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects in the prior art and provide a photovoltaic power generation device of HJT microcrystalline cells which has improved sealing performance, reduced weight, facilitated installation and transportation, and reduced costs.

[0006] To achieve the above technical effects, the technical solution of the present invention is: a photovoltaic power generation device of HJT microcrystalline cells, comprising:

[0007] A battery encapsulation layer, the battery encapsulation layer comprising a front adhesive film layer, an HJT battery layer and a back adhesive film layer stacked and connected in sequence;

[0008] A light-transmitting shell, comprising a light-transmitting cover, a back light-transmitting plate, and an elastic sealing frame. The back light-transmitting plate is disposed on the side of the back adhesive film layer facing away from the HJT battery layer. The light-transmitting cover is sealed and connected to the back light-transmitting plate via the sealing frame to form an isolation cavity. The battery encapsulation layer is disposed in the isolation cavity.

[0009] A sealing and fastening assembly is used to fasten the light-transmitting cover and the sealing frame.

[0010] Preferably, in order to facilitate the assembly of the sealing frame, the outer circumferential edge of the light-transmitting cover adjacent to the back light-transmitting plate is provided with an outer flange, and the outer flange and the back light-transmitting plate are combined to form a closed-loop sealing cavity, and the sealing frame is clamped in the sealing cavity.

[0011] Preferably, in order to facilitate elastic deformation of the sealing frame and ensure sealing performance, the sealing frame is a hollow sealing frame.

[0012] Preferably, in order to further improve the sealing performance, the sealing frame is a butyl rubber sealing frame.

[0013] Preferably, in order to simplify the structure, reduce cost and weight, and facilitate transportation and installation, the sealing and fastening assembly includes a frame profile connected end to end in sequence, the cross-section of the frame profile is U-shaped, the outer flange and the back light-transmitting plate are clamped in the U-shaped opening of the frame profile, and adjacent frame profiles are fixedly connected by a connecting unit.

[0014] Preferably, in order to further enhance the sealing performance, the ends of adjacent frame profiles are sealed and fitted together.

[0015] Preferably, in order to reduce the area occupied by the laying, the connecting unit is provided on the side of the back light-transmitting plate facing away from the battery encapsulation layer.

[0016] Preferably, in order to achieve the connection between adjacent frame profiles, the connecting unit includes a fastening strip, and both ends of the fastening strip are provided with a threaded screw and a threaded sleeve, the screw is fixed on the frame profile, and the end of the fastening strip is sleeved outside the screw and clamped between the threaded sleeve and the frame profile.

[0017] Preferably, in order to reduce light blocking on the back of the photovoltaic module, the fastening strip is an acrylic strip.

[0018] Preferably, in order to facilitate the rotation of the threaded sleeve, the circumferential outer edge of the threaded sleeve is provided with anti-slip grooves.

[0019] To sum up, compared with the existing technology, the photovoltaic power generation device of the HJT microcrystalline cell of the present invention uses a sealing and fastening component to fasten the light-transmitting cover and the back light-transmitting plate to form an isolation cavity of the light-transmitting shell to protect the internal battery packaging layer, and only needs to set a sealing frame on the back of the battery packaging layer, which can reduce the number of sealing frames while ensuring the good waterproof sealing performance of the photovoltaic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram of the first embodiment;

[0021] Figure 2 yes Figure 1 Explosion diagram of

[0022] Figure 3 is a structural diagram of the first embodiment from another perspective;

[0023] Figure 4 yes Figure 3 Explosion diagram of

[0024] Figure 5 is a cross-sectional structural diagram of the first embodiment;

[0025] Figure 6 2. It is a schematic diagram of the connection structure between the frame profile and the connection unit of the first embodiment;

[0026] Figure 7 yes Figure 6 Explosion diagram of

[0027] Figure 8 is a cross-sectional structural diagram of the second embodiment;

[0028] Figure 9 yes Figure 8 A magnified view of part A;

[0029] In the figure: 1. Battery packaging layer; 11. Front film layer; 12. HJT battery layer; 13. Back film layer; 2. Translucent shell; 21. Translucent cover; 211. Outer flange; 212. First clamping groove; 22. Back translucent plate; 221. Second clamping groove; 23. Sealing frame; 3. Sealing and fastening assembly; 4. Frame profile; 41. Positioning blind hole; 5. Connecting unit; 51. Fastening strip; 52. Screw; 521. Positioning seat; 522. Positioning boss; 53. Threaded sleeve; 531. Anti-slip pattern. DETAILED DESCRIPTION

[0030] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0031] First embodiment

[0032] like Figure 1-Figure 7 As shown, the photovoltaic power generation device of the HJT microcrystalline cell of the first embodiment of the utility model includes:

[0033] The battery packaging layer 1 includes a front adhesive film layer 11, an HJT battery layer 12 and a back adhesive film layer 13 which are sequentially stacked and connected;

[0034] The light-transmitting shell 2 includes a light-transmitting cover 21, a back light-transmitting plate 22, and an elastic sealing frame 23. The back light-transmitting plate 22 is disposed on the side of the back film layer 13 facing away from the HJT battery layer 12. The light-transmitting cover 21 is sealed and connected to the back light-transmitting plate 22 via the sealing frame 23 to form an isolation cavity. The battery packaging layer 1 is disposed in the isolation cavity.

[0035] The sealing and fastening assembly 3 is used to fasten the light-transmitting cover 21 and the sealing frame 23 .

[0036] In this embodiment, the light-transmitting cover 21 and the back light-transmitting plate 22 are respectively a glass cover and a glass plate. An elastic sealing frame 23 is provided at the connection portion between the two to ensure the sealing connection between the light-transmitting cover 21 and the back light-transmitting plate 22, thereby forming an isolation cavity of the light-transmitting shell 2. The interior of the isolation cavity is used to provide a battery encapsulation layer 1 formed by a front adhesive film layer 11, an HJT battery layer 12 and a back adhesive film layer 13 stacked in sequence, wherein the front adhesive film layer 11 is fixedly connected to the inner bottom wall of the light-transmitting cover 21, and the back adhesive film layer 13 is fixedly connected to the back light-transmitting plate 22. Then, the light-transmitting cover 21 and the back light-transmitting plate 22 are fastened together by a sealing and fastening assembly 3 to prevent the two from separating from each other, thereby ensuring a stable connection between the light-transmitting cover 21 and the back light-transmitting plate 22.

[0037] Therefore, since the connection between the light-transmitting cover 21 and the back light-transmitting plate 22 is only on the backlight side of the battery packaging layer 1, it is only necessary to set a sealing frame 23 there to ensure that the internal isolation cavity of the light-transmitting shell 2 is well isolated from the outside world. While reducing the number of sealing frames 23 set, it ensures the good waterproof sealing performance of the photovoltaic module.

[0038] A further improvement is that an outer flange 211 is provided on the side of the circumferential outer edge of the light-transmitting cover 21 adjacent to the back light-transmitting plate 22 . The outer flange 211 and the back light-transmitting plate 22 enclose a closed-loop sealed cavity, and the sealing frame 23 is clamped in the sealed cavity.

[0039] Specifically, the light-transmitting cover 21 includes a light-transmitting sealing frame, which is a rectangular frame. One end of the light-transmitting sealing frame is integrally connected and covered with a front light-transmitting plate. The front light-transmitting plate is fixedly connected to the front adhesive film layer 11. The circumferential outer edge of the other end is integrally connected with a rectangular frame-shaped outer flange 211. The side of the outer flange 211 facing away from the front light-transmitting plate is provided with a first clamping groove 212, and the side of the back light-transmitting plate 22 adjacent to the front light-transmitting plate is provided with a second clamping groove 221. The notches of the first clamping groove 212 and the second clamping groove 221 are arranged opposite to each other, and the two are combined to form a closed-loop sealed cavity, and the battery packaging layer 1 is located on the inner side of the sealed cavity.

[0040] The sealing frame 23 is clamped in the sealing cavity so that in the natural state, the cross-sectional dimension of the sealing frame 23 is larger than the cross-sectional dimension of the sealing cavity. When the sealing frame 23 is installed between the first clamping groove 212 of the outer flange 211 and the second clamping groove 221 of the back light-transmitting plate 22, the sealing frame 23 is squeezed, so that the outer surface of the sealing frame 23 is sealed and fitted with the cavity wall of the sealing cavity, thereby ensuring the sealed connection between the light-transmitting cover 21 and the back light-transmitting plate 22, improving the waterproof sealing performance of the photovoltaic module, and preventing the HJT cell layer 12 from being affected by water vapor.

[0041] A further improvement is that the sealing frame 23 is a butyl rubber sealing frame 23. Butyl rubber is a type of synthetic rubber synthesized from isobutylene and a small amount of isoprene. Compared with other rubbers, the butyl rubber sealing frame 23 has excellent airtightness, a dense structure, good waterproof performance, and is resistant to aging, high temperature, and corrosion. Therefore, it can be used for a long time in natural environments without cracking or deterioration. This ensures long-term and stable sealing and waterproof performance between the light-transmitting cover 21 and the back light-transmitting plate 22.

[0042] A further improvement is that the sealing and fastening assembly 3 includes a frame profile 4 connected end to end in sequence, the cross-section of the frame profile 4 is U-shaped, the outer flange 211 and the back light-transmitting plate 22 are clamped in the U-shaped opening of the frame profile 4, and adjacent frame profiles 4 are fixedly connected by a connecting unit 5.

[0043] The cross section of the frame profile 4 is U-shaped, and it has a U-shaped clamping groove, which can be used to set up the edge position of the outer flange 211 and the back light-transmitting plate 22, and then squeeze the sealing frame 23 to ensure that the outer flange 211 is firmly connected to the back light-transmitting plate 22. The frame profile 4 adopts a U-shaped cross-section design, which simplifies the structure, reduces the amount of production materials, and thus reduces production costs, reduces weight, and facilitates transportation and installation. The adjacent frame profiles 4 are connected by the connecting unit 5 to form a frame-like structure to prevent the frame profile 4 from detaching from the outer flange 211.

[0044] A further improvement is that the ends of adjacent frame profiles 4 are sealed and fitted. With this design, adjacent frame profiles 4 are sequentially connected end to end, forming a closed-loop clamping groove with the notch facing inward. This can clamp and fix the outer flange 211 and the back light-transmitting plate 22, ensuring that the outer flange 211 and the back light-transmitting plate 22 are evenly stressed. At the same time, the closed-loop clamping groove formed can further improve the sealing performance and prevent moisture from entering the frame profile 4 from the end of the frame profile 4.

[0045] A further improvement is that the connection unit 5 is arranged on the side of the back light-transmitting plate 22 facing away from the battery encapsulation layer 1. Placing the connection unit 5 on the side of the back light-transmitting plate 22 facing away from the battery encapsulation layer 1 reduces the area occupied by the photovoltaic module and avoids the impact of installation on the amount of light absorbed by the front side of the HJT battery layer 12.

[0046] A further improvement is that the connecting unit 5 includes a fastening strip 51, and the two ends of the fastening strip 51 are provided with a threaded screw 52 and a threaded sleeve 53, the screw 52 is fixed on the frame profile 4, and the end of the fastening strip 51 is sleeved outside the screw 52 and clamped between the threaded sleeve 53 and the frame profile 4.

[0047] Specifically, positioning blind holes 41 are provided near both ends of the frame profile 4, and one end of the screw 52 is fixedly connected to a positioning seat 521 and a positioning boss 522 in sequence coaxially, wherein the positioning boss 522 is adapted to the positioning blind hole 41; the circumferential outer edge of the threaded sleeve 53 is provided with anti-slip grooves 531; the fastening strip 51 is an acrylic strip.

[0048] Before actual assembly, the positioning boss 522 is installed in the positioning blind hole 41 so that the positioning seat 521 fits the surface of the frame profile 4, and then the positioning seat 521 and the positioning boss 522 are fixed to the frame profile 4 by welding.

[0049] After the battery packaging layer 1 is placed in the light-transmitting cover 21, a sealing frame 23 is placed in the first clamping groove 212, and the back light-transmitting plate 22 is covered so that the circumferential outer edge of the back light-transmitting plate 22 is aligned with the outer wall of the outer flange 211. Then, the frame profile 4 is placed on the outer flange 211 and the edge of the back light-transmitting plate 22 in the direction of the four side walls. Then, the two ends of the fastening strip 51 are respectively placed outside the screw rod 52 at the end of the adjacent frame profile 4. The threaded sleeve 53 is screwed into the outside of the screw rod 52 so that the threaded sleeve 53 locks the end of the fastening strip 51 on the positioning seat 521. The fastening strip 51 can then be used to connect the adjacent frame profiles 4. After adopting the above method, the four frame profiles 4 are connected end to end in sequence to form a rectangular frame structure, which prevents the frame profile 4 from detaching from the light-transmitting cover 2.

[0050] The fastening strip 51 is made of acrylic strip. On the one hand, the acrylic strip has high structural strength and can prevent the corners from being damaged due to excessive force. On the other hand, the acrylic strip has high light transmittance and can reduce the light blocking facing the back of the photovoltaic module, ensuring the amount of light received by the back and thus ensuring the amount of photovoltaic power generation. The anti-slip groove 531 on the outer periphery of the threaded sleeve 53 can increase the roughness of the outer wall surface of the threaded sleeve 53, making it easier to rotate the threaded sleeve 53 and lock the fastening strip 51 on the positioning seat 521.

[0051] Second embodiment

[0052] like Figure 8 and Figure 9 As shown, the photovoltaic power generation device of the HJT microcrystalline cell of the second embodiment of the present invention is based on the first embodiment, with the difference that the sealing frame 23 is a hollow sealing frame 23.

[0053] The hollow structure of the sealing frame 23 makes it easy to deform. After being squeezed, it can be deformed by compressing the size of the internal space, thereby ensuring the sealing between the sealing frame 23 and the outer flange 211 and the back light-transmitting plate 22. At the same time, the side of the outer flange 211 facing away from the front light-transmitting plate is sealed with the back light-transmitting plate 22, thereby enhancing the sealing performance and reducing the penetration of water vapor.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A photovoltaic power generation device of HJT microcrystalline cells, characterized in that: include: A battery encapsulation layer (1), the battery encapsulation layer (1) comprising a front adhesive film layer (11), an HJT battery layer (12), and a back adhesive film layer (13) which are sequentially stacked and connected; A light-transmitting shell (2), the light-transmitting shell (2) comprising a light-transmitting cover (21), a back light-transmitting plate (22) and an elastic sealing frame (23), the back light-transmitting plate (22) being arranged on a side of the back adhesive film layer (13) facing away from the HJT battery layer (12), the light-transmitting cover (21) being sealed and connected to the back light-transmitting plate (22) via the sealing frame (23) and enclosing to form an isolation cavity, the battery encapsulation layer (1) being arranged in the isolation cavity; A sealing fastening assembly (3), the sealing fastening assembly (3) is used to fasten the light-transmitting cover (21) and the sealing frame (23) together.

2. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 1, characterized in that: An outer flange (211) is provided on a side of the circumferential outer edge of the light-transmitting cover (21) adjacent to the back light-transmitting plate (22). The outer flange (211) and the back light-transmitting plate (22) enclose a closed-loop sealed cavity, and the sealing frame (23) is clamped in the sealed cavity.

3. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 1, characterized in that: The sealing frame (23) is a hollow sealing frame (23).

4. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 1, characterized in that: The sealing frame (23) is a butyl rubber sealing frame (23).

5. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 2, characterized in that: The sealing and fastening assembly (3) comprises frame profiles (4) connected end to end in sequence, the cross section of the frame profile (4) being U-shaped, the outer flange (211) and the back light-transmitting plate (22) being clamped in the U-shaped opening of the frame profile (4), and adjacent frame profiles (4) being fixedly connected via a connecting unit (5).

6. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 5, characterized in that: The ends of adjacent frame profiles (4) are sealed and fitted together.

7. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 5, characterized in that: The connection unit (5) is arranged on a side of the back light-transmitting plate (22) facing away from the battery packaging layer (1).

8. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 7, characterized in that: The connecting unit (5) comprises a fastening strip (51), wherein both ends of the fastening strip (51) are provided with a screw rod (52) and a threaded sleeve (53) connected in a threaded manner, wherein the screw rod (52) is fixed to the frame profile (4), and the end of the fastening strip (51) is sleeved outside the screw rod (52) and clamped between the threaded sleeve (53) and the frame profile (4).

9. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 8, characterized in that: The fastening strip (51) is an acrylic strip.

10. The photovoltaic power generation device of the HJT microcrystalline cell according to claim 8, characterized in that: The circumferential outer edge of the threaded sleeve (53) is provided with anti-slip grooves (531).

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