Long-life hjt bifacial double-glass cell module

Abstract

The application discloses a long-life HJT bifacial double-glass battery module, which comprises a battery body, the battery body comprises a first glass layer, an encapsulation layer and a second glass layer which are sequentially stacked, the encapsulation layer is provided with a battery piece, the first glass layer and the second glass layer are provided with positioning blocks which abut against the encapsulation layer on the side surfaces, the contact surfaces of the first glass layer, the second glass layer and the positioning blocks are coated with a first adhesive film layer, a frame assembly is arranged outside the positioning blocks, and a rubber cloth clamping flat tube is arranged between the frame assembly and the positioning blocks, the frame assembly comprises an outer frame arranged outside the rubber cloth clamping flat tube and a sealing element arranged between the outer frame and the first glass layer and the second glass layer. The rubber tube which can be inflated is arranged between the frame assembly and the glass layer, the sealing element is acted on by the pressure generated after inflation to be attached to the glass layer to generate sealing performance, and in combination with the adhesive film on the two sides of the positioning block and the two groups of sealing layers, the water vapor in the outside world is effectively prevented from entering the photovoltaic module.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photovoltaic cells, in particular to a long-service-life HJT double-sided double-glass cell module. BACKGROUND

[0002] The main goal of the current development of solar cells is to reduce costs, improve photoelectric conversion efficiency, and achieve parity with grid electricity as soon as possible. HJT solar cells have the characteristics of high efficiency, simple process, anti-PID, low temperature coefficient, high power generation, low light decay, etc., which improve the reliability and stability of photovoltaic modules. It should be noted that the HJT solar cell and the HJT cell described below are only simplified descriptions, and the actual meanings are the same as the HJT solar cell. In addition, the HJT cell is a symmetrical structure, and power can be generated on both sides, with a double-sided rate of more than 90%. Compared with single-sided solar cells, at least 30-40% more power can be output, so the HJT cell is considered to be the mainstream product of the next generation of solar cells.

[0003] However, HJT, perovskite and other new photovoltaic cells are extremely sensitive to water vapor, so the waterproof performance of the module packaging is crucial. In order to enhance the water resistance and reduce the water permeability, in the prior art, butyl rubber is usually used to connect the aluminum profile frame and the photovoltaic module. Compared with other sealants such as rubber, silicone and latex, butyl rubber can improve the sealing performance, but after long-term use, the water vapor in the air can still pass through the butyl rubber and enter the cell layer from the circumferential four sides of the photovoltaic module to contact the HJT cell, affecting the normal photovoltaic power generation and service life of the photovoltaic module. SUMMARY

[0004] In order to solve the above technical problems, a long-service-life HJT double-sided double-glass cell module is provided.

[0005] In order to achieve the above purpose, the application discloses a long-service-life HJT double-sided double-glass cell module, which comprises a cell body, the cell body comprises a first glass layer, a packaging layer and a second glass layer which are sequentially stacked, the packaging layer is provided with a cell piece, the first glass layer and the second glass layer are provided with a positioning block abutting against the packaging layer on the side surface, the bottom of the second glass layer is used as a back surface junction box opening area of the double-glass cell module, a first adhesive film layer is coated on the contact surface of the first glass layer, the second glass layer and the positioning block, a frame assembly is arranged outside the positioning block, a cloth-clamping rubber flat tube is arranged between the frame assembly and the positioning block, the frame assembly comprises an outer frame arranged outside the cloth-clamping rubber flat tube and a sealing element arranged between the outer frame and the first glass layer and the second glass layer, a second adhesive film layer is coated on one side of the cloth-clamping rubber flat tube close to the positioning block, and the sealing element comprises an extrusion end arranged in the outer frame and a sealing end attached to the first glass layer and the second glass layer.

[0006] Further, the first glass layer and the second glass layer are symmetrically arranged on the upper and lower sides of the encapsulation layer, the first glass layer and the second glass layer are provided with chamfers on the side edges and are adhered to the first adhesive film layer on the inner side of the positioning block, the positioning block, the cloth clamping rubber flat tube and the chamfer form a cavity, and the cavity is filled with the first sealing layer.

[0007] Further, the bottom of the extrusion end of the sealing member extends downwardly with a bent extrusion plate, the inner side of the outer frame close to the end face of the extrusion end is provided with a clamping groove, and the end face of the extrusion end is provided with a clamping claw corresponding to the clamping groove.

[0008] Further, the clamping groove is provided with a pressure sensor.

[0009] Further, the side of the sealing end of the sealing member close to the outer frame is an arc-shaped pressing strip, the side away from the outer frame is a straight pressing strip, the arc-shaped pressing strip and the outer frame are filled with a second sealing layer, and the arc-shaped pressing strip and the straight pressing strip are filled with a waterproof layer.

[0010] Further, the end face of the arc-shaped pressing strip and the straight pressing strip close to the side of the first glass layer and the second glass layer is provided with a sealing tooth with a trapezoidal cross section.

[0011] Further, the cloth clamping rubber flat tube comprises a rubber layer on the inner side and a cloth clamping layer arranged on the outer side of the rubber layer, and the cloth clamping rubber flat tube is provided with an inflation port passing through the outer frame at a middle position.

[0012] Further, the outer frame is provided with a groove close to the end position of the cloth clamping rubber flat tube, and the groove is larger than the width of the cloth clamping rubber flat tube.

[0013] Compared with the prior art, the present application has the following beneficial effects: the present application discloses a long-life HJT double-sided double-glass battery assembly, a rubber tube that can be inflated is arranged between the frame assembly and the glass layer, the pressure generated after inflation acts on the sealing member to make the sealing member adhere to the glass layer to generate sealing performance, in combination with the adhesive film on the two sides of the positioning block and the two groups of sealing layers, the external moisture is effectively prevented from entering the photovoltaic assembly, and the service life of the photovoltaic battery assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0016] Figure 2 It is a schematic diagram of the overall structure of the present application. Figure 1 It is an enlarged view A of the cloth clamping rubber flat tube in the inflated state.

[0017] Figure 3 It is a schematic diagram of the overall structure of the present application. Figure 1Close-up view A of the cloth-encased rubber flat tube in a non-inflated state.

[0018] Figure 4 Close-up view A of the cloth-encased rubber flat tube in a non-inflated state. Figure 3 Close-up view A of the cloth-encased rubber flat tube in a non-inflated state.

[0019] Figure 5 Close-up view A of the cloth-encased rubber flat tube in a non-inflated state.

[0020] Figure 6 Close-up view A of the cloth-encased rubber flat tube in a non-inflated state. Figure 5 Close-up view A of the cloth-encased rubber flat tube in a non-inflated state.

[0021] Figure 7 Close-up view A of the cloth-encased rubber flat tube in a non-inflated state.

[0022] In the figure: 1 is a first glass layer; 2 is a second glass layer; 3 is an encapsulation layer; 4 is a frame assembly; 41 is an outer frame; 411 is a clamping groove; 42 is a sealing element; 421 is a straight pressing strip; 422 is an arc-shaped pressing strip; 423 is a waterproof layer; 424 is an extrusion plate; 425 is a sealing tooth; 43 is a second sealing layer; 5 is a cloth-encased rubber flat tube; 51 is a rubber layer; 52 is a cloth layer; 53 is an inflation port; 6 is a positioning block; 61 is a first adhesive film layer; 62 is a second adhesive film layer; 7 is a first sealing layer; 8 is a pressure sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0024] One embodiment of the present application is as follows: Figure 1 and Figure 2As shown, a long-life HJT bifacial double-glass battery module includes a battery body, the battery body includes a first glass layer 1, an encapsulation layer 3 and a second glass layer 2 which are sequentially stacked, the encapsulation layer 3 is provided with a battery piece, specifically, the encapsulation layer 3 is a transparent silicone layer or a polyolefin layer, compared with the traditional EVA encapsulation film, its advantage lies in that it can convert the ultraviolet light absorbed by the EVA ultraviolet absorber into electrical energy, increase the output of the photovoltaic module, in addition, the transparent silicone layer or the polyolefin layer is very stable under ultraviolet light irradiation and will not degrade to produce small molecules such as acetic acid to corrode the battery piece, and has better weather resistance, the first glass layer 1 and the second glass layer 2 are provided with positioning blocks 6 abutting against the encapsulation layer 3 on the side, specifically, the positioning blocks 6 adopt butyl rubber parts or polyisobutylene rubber parts and other adhesive parts with low water vapor transmission rate, combined with the first sealing layer 7 and the second sealing layer 43, the water vapor and corrosive gas in the environment can be well blocked from entering the inside of the photovoltaic module, the attenuation of the module is slowed down, thereby prolonging the service life of the photovoltaic module, the bottom of the second glass layer 2 serves as a back surface junction box opening area of the double-glass battery module, the contact surface of the first glass layer 1, the second glass layer 2 and the positioning block 6 is coated with a first adhesive film layer 61, a frame assembly 4 is arranged outside the positioning block 6, a cloth-clamping rubber flat tube 5 is arranged between the frame assembly 4 and the positioning block 6, the frame assembly 4 includes an outer frame 41 arranged outside the cloth-clamping rubber flat tube 5 and a sealing part 42 arranged between the outer frame 41 and the first glass layer 1 and the second glass layer 2, the side of the cloth-clamping rubber flat tube 5 close to the positioning block 6 is coated with a second adhesive film layer 62, the sealing part 42 includes an extrusion end arranged in the outer frame 41 and a sealing end adhered to the first glass layer 1 and the second glass layer 2, inflatable rubber tubes are arranged between the frame assembly and the glass layer, the pressure generated after inflation acts on the sealing part to make it adhere to the glass layer to generate sealing property, combined with the adhesive film on both sides of the positioning block and the two sets of sealing layers, the water vapor from the outside is effectively prevented from entering the photovoltaic module, and the service life of the photovoltaic battery module is improved.

[0025] The first glass layer 1 and the second glass layer 2 are symmetrically arranged on the upper and lower sides of the encapsulation layer 3, the side edges of the first glass layer 1 and the second glass layer 2 are provided with chamfers and are adhered to the first adhesive film layer 61 inside the positioning block 6, the positioning block 6 and the cloth-clamping rubber flat tube 5 form a cavity at the chamfer, and the cavity is filled with the first sealing layer 7, the most fragile part of the glass layer is the edge and the four corners, the rubber part positioning block 6 and the cloth-clamping rubber flat tube 5 arranged at the chamfer are used to avoid the rigid contact between the glass layer and the frame assembly, and reduce the risk of component cracking.

[0026] As shown in the drawings, Figure 2 and Figure 3As shown, the bottom of the extrusion end of the sealing member 42 extends downward with a bent extrusion plate 424, the inner side of the outer frame 41 near the end face of the extrusion end is provided with a clamping groove 411, the end face of the extrusion end is provided with a clamping jaw corresponding to the clamping groove 411, and the clamping groove 411 is provided with a pressure sensor 8. During the inflation and expansion of the cloth-clamping rubber flat tube 5, the volume continuously increases until the cloth-clamping rubber flat tube 5 contacts the extrusion plate 424, the cloth-clamping rubber flat tube 5 generates an upward force on the extrusion plate 424, and the clamping jaw is driven to move upward in the clamping groove 411. When the clamping jaw abuts against the pressure sensor 8, it indicates that the inflation of the cloth-clamping rubber flat tube 5 is completed, and the inflation can be stopped to avoid excessive inflation pressure from damaging the battery piece assembly. At the same time, according to the thermal expansion and contraction and the change of the external temperature, the worker can adjust the pressure in the cloth-clamping rubber flat tube 5 in real time according to the detection value of the pressure sensor.

[0027] The sealing end of the sealing member 42 near the outer frame 41 is an arc-shaped pressing strip 422, and the side away from the outer frame 41 is a straight pressing strip 421. The arc-shaped pressing strip 422 and the outer frame 41 are filled with a second sealing layer 43, and the arc-shaped pressing strip 422 and the straight pressing strip 421 are filled with a waterproof layer 423. The waterproof layer 423 absorbs and prevents external water vapor from entering the photovoltaic assembly. Combined with the first sealing layer 7 and the second sealing layer 43, a multiple sealing effect is achieved, and the sealing performance of the photovoltaic assembly is further improved. Figure 4 As shown, the end faces of the arc-shaped pressing strip 422 and the straight pressing strip 421 near the first glass layer 1 and the second glass layer 2 are provided with sealing teeth 425 with a trapezoidal cross section, which increases the contact area with the glass layer and prevents external water vapor from entering the photovoltaic assembly.

[0028] As shown in Figure 5 and Figure 6 The cloth-clamping rubber flat tube 5 includes an inner rubber layer 51 and a cloth layer 52 arranged outside the rubber layer 51. The cloth-clamping rubber flat tube 5 is provided with an inflation port 53 passing through the outer frame 41 at a middle position. The cloth layer 52 contacts the outer frame 41 to protect the inner rubber layer 51 and reduce wear and tear, thereby prolonging the service life of the cloth-clamping rubber flat tube 5.

[0029] As shown in Figure 7 The outer frame 41 is provided with a groove larger than the width of the cloth-clamping rubber flat tube 5 near the end position of the cloth-clamping rubber flat tube 5 to limit the cloth-clamping rubber flat tube 5. During the inflation process of the cloth-clamping rubber flat tube 5, the cloth-clamping rubber flat tube 5 expands and moves up and down along the groove in the outer frame 41 to avoid disengaging from the outer frame 41 during the expansion process of the cloth-clamping rubber flat tube 5.

[0030] Need to explain a few points are: first, in the description of the present application, need to explain is, unless otherwise specified and limited, the term "installation", "connected", "connection" should be broad understanding, can be mechanical connection or electrical connection, but also can be two elements inside the communication, can be directly connected, "up", "down", "left", "right" and so on, only for indicating the relative position relationship, when the absolute position of the described object changes, the relative position relationship may change; secondly, in this paper, such as first and second relationship terms such as only to distinguish one entity from another entity, and does not necessarily require or imply that these entities have any such actual relationship or order.

[0031] The above examples are only examples of the present application, and do not constitute a limitation on the scope of protection of the present application, any same or similar design as the present application belongs to the protection scope of the present application.

Claims

1. A long-life HJT bifacial double-glass cell module comprising a cell body, characterized by, The battery body comprises a first glass layer (1), an encapsulation layer (3) and a second glass layer (2) which are sequentially stacked, the encapsulation layer (3) is provided with battery pieces, the first glass layer (1) and the second glass layer (2) are provided with positioning blocks (6) abutting against the encapsulation layer (3) on the side surface, the bottom of the second glass layer (2) is used as a back surface junction box opening area of the double-glass battery assembly, the contact surface of the first glass layer (1), the second glass layer (2) and the positioning block (6) is coated with a first adhesive film layer (61), the outer side of the positioning block (6) is provided with a frame assembly (4), the frame assembly (4) and the positioning block (6) are provided with a cloth-clamping rubber flat tube (5), the frame assembly (4) comprises an outer frame (41) provided on the outer side of the cloth-clamping rubber flat tube (5) and a sealing element (42) provided between the outer frame (41) and the first glass layer (1) and the second glass layer (2), the side of the cloth-clamping rubber flat tube (5) close to the positioning block (6) is coated with a second adhesive film layer (62), the sealing element (42) comprises an extrusion end provided in the outer frame (41) and a sealing end adhered to the first glass layer (1) and the second glass layer (2), the bottom of the extrusion end of the sealing element (42) extends downwardly with a bent extrusion plate (424), one side of the inner part of the outer frame (41) close to the end surface of the extrusion end is provided with a clamping groove (411), the end surface of the extrusion end is provided with a clamping jaw corresponding to the clamping groove (411), one side of the sealing end of the sealing element (42) close to the outer frame (41) is an arc-shaped pressing strip (422), and the side away from the outer frame (41) is a straight pressing strip (421), the arc-shaped pressing strip (422) and the outer frame (41) are filled with a second sealing layer (43), and the arc-shaped pressing strip (422) and the straight pressing strip (421) are filled with a waterproof layer (423), the cloth-clamping rubber flat tube (5) comprises a rubber layer (51) on the inner side and a cloth-clamping layer (52) provided on the outer side of the rubber layer (51), and the cloth-clamping rubber flat tube (5) is provided with an inflation port (53) penetrating through the outer frame (41) at a middle position.

2. A long lifetime HJT bifacial double glass cell module according to claim 1, characterized in that, The first glass layer (1) and the second glass layer (2) are symmetrically arranged on the upper and lower sides of the encapsulation layer (3), the side edges of the first glass layer (1) and the second glass layer (2) are provided with chamfers and are adhered to the first adhesive film layer (61) on the inner side of the positioning block (6), the positioning block (6) and the cloth-clamping rubber flat tube (5) form a cavity at the chamfer, and the cavity is filled with a first sealing layer (7).

3. A long-life HJT bifacial double-glass cell module according to claim 1, characterized in that, A pressure sensor (8) is arranged in the clamping groove (411).

4. A long-life HJT bifacial double-glass cell module according to claim 1, characterized in that, The end surfaces of the arc-shaped pressing strip (422) and the straight pressing strip (421) close to the first glass layer (1) and the second glass layer (2) are provided with sealing teeth (425) with trapezoidal cross sections.

5. A long-life HJT bifacial double-glass cell module according to claim 1, characterized in that, The outer frame (41) is provided with a groove larger than the width of the cloth-clamping rubber flat tube (5) at a position close to the end of the cloth-clamping rubber flat tube (5).

Images