A BC solar cell carrier film composite equipment

Abstract

This invention provides a BC solar cell carrier film lamination device, relating to the field of solar cell technology, which solves the problem of low bubble removal efficiency during the lamination process of BC solar cells and carrier films. The BC solar cell carrier film lamination device includes an air channel generation unit and an exhaust unit; the air channel generation unit includes a first roller and an air channel generating component disposed on the circumferential surface of the first roller; the air channel generating component includes a piercing portion; the piercing portion pierces the carrier film, forming an exhaust channel on the carrier film; the exhaust unit is used to remove bubbles between the carrier film and the BC solar cell. This invention's BC solar cell carrier film lamination device improves the bubble removal efficiency between the BC solar cell and the carrier film without increasing production steps.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, and in particular to a BC cell carrier film composite device. Background Technology

[0002] In the manufacturing process of photovoltaic modules, the lamination of BC solar cells with the carrier film is a crucial step. However, traditional lamination processes are prone to generating air bubbles, which can affect the reliability of the module under high temperature and high humidity environments. Existing methods for removing air bubbles typically employ vacuum lamination processes, which have the following problems:

[0003] 1. Before the composite process between the carrier film and the solar cell, the carrier film is already bonded to the silicon substrate, resulting in no air escape path during vacuuming and low efficiency in bubble removal.

[0004] 2. In order to expel residual gas during the lamination process, it is necessary to pre-set venting channels on the surface of the carrier membrane. However, this method will increase the manufacturing cost of the carrier membrane. At the same time, the pre-drilled vents are prone to self-closing when the carrier membrane is laminated under lamination pressure. Utility Model Content

[0005] The purpose of this invention is to provide a BC solar cell carrier film composite device to solve the problem of low bubble removal efficiency during the composite process of BC solar cells and carrier film.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a BC battery cell carrier film composite device, which includes an air channel generation unit and an exhaust unit;

[0008] The air passage forming unit includes a first roller body and an air passage forming component disposed on the circumferential surface of the first roller body; the air passage forming component includes a piercing portion; the piercing portion is used to pierce the carrier film and form an exhaust channel on the carrier film;

[0009] The venting unit is used to remove air bubbles between the carrier membrane and the BC battery cell.

[0010] According to at least one embodiment of the present invention, the airway generating unit further includes a heating element, which is used to heat the airway generating element;

[0011] During the rolling of the first roller, the heated piercing portion pierces the carrier film to form an exhaust channel.

[0012] According to at least one embodiment of the present invention, the air passage generating unit further includes a first damping layer, which is sleeved on the first roller body; the first damping layer has an assembly hole, and the air passage generating component is disposed in the assembly hole.

[0013] According to at least one embodiment of the present invention, the puncture portion has a rounded corner facing the support membrane.

[0014] According to at least one embodiment of the present invention, the airway generating components are arranged in pairs;

[0015] When the airway generating element pierces the carrier membrane, each pair of airway generating elements forms a first projection and a second projection on the plane where the solder strip is located, with the solder strip located between the first projection and the second projection.

[0016] According to at least one embodiment of the present invention, the first damping layer includes extrusion protrusions, which are disposed adjacent to the airway generating member;

[0017] The end face of the extrusion protrusion that extrudes the carrier membrane is inclined, and the end of the inclined surface away from the airway generating member is higher than the end close to the airway generating member.

[0018] According to at least one embodiment of the present invention, the exhaust unit includes a second roller body and a second damping layer, wherein the second damping layer is sleeved on the second roller body.

[0019] According to at least one embodiment of the present invention, in a direction perpendicular to the carrier membrane, the minimum distance between the exhaust unit and the carrier membrane is less than the minimum distance between the air passage generation unit and the carrier membrane.

[0020] According to at least one embodiment of the present invention, a reciprocating unit is further included; in a direction perpendicular to the carrier film, the reciprocating unit is used to drive the first roller to rise and fall.

[0021] According to at least one embodiment of the present invention, the reciprocating unit includes a drive unit, a cam, a rolling element, a transmission element, a guide shaft, a spring, and a pressure block;

[0022] The transmission component is disposed at both ends of the first roller body; the rolling element is disposed on the transmission component; the cam abuts against the rolling element; the cam is disposed at the output end of the drive unit; the guide shaft passes vertically through the transmission component to provide motion guidance for the transmission component; the pressure block is disposed at the upper end of the guide shaft; the spring is disposed between the transmission component and the pressure block; the first roller body rises and falls under the driving and guiding action of the transmission component and the guide shaft.

[0023] The technical solutions provided in the exemplary embodiments of this utility model can achieve the following beneficial effects.

[0024] The BC battery cell carrier film lamination equipment of this exemplary embodiment includes an air channel generation unit and an exhaust unit. The air channel generation unit includes a first roller and an air channel generating component. During the relative movement of the conveying platform and the first roller, the air channel generating component pierces the carrier film and forms an exhaust channel on the carrier film. The exhaust unit is used to expel air bubbles between the carrier film and the BC battery cell. Specifically, when the carrier film and the BC battery cell are located at the air channel generation unit, the air channel generating component on the first roller forms an exhaust channel on the carrier film through the rotation of the first roller. Then, the carrier film with the exhaust channel and the BC battery cell are transported to the exhaust unit, and the air bubbles between the BC battery cell and the carrier film are expelled from the exhaust channel by the extrusion of the exhaust unit. Therefore, during the lamination process of the BC battery cell and the carrier film, an exhaust channel can be formed, and air bubbles can be expelled from the exhaust channel by extrusion, thereby improving the efficiency of air bubble removal. No additional processing of the carrier film is required, thus saving manufacturing costs.

[0025] The exemplary embodiment of this utility model of the BC battery cell carrier film composite equipment includes an air channel generation unit in which a heating element heats the air channel generation component, and the heated air channel generation component pierces the carrier film to form an exhaust channel on the carrier film. The hot piercing method can precisely control the size of the exhaust channel. Furthermore, the use of the heated air channel generation component to pierce the carrier film has strong material adaptability and can process different types of carrier film materials.

[0026] The BC cell carrier film composite device of the exemplary embodiment of this utility model is further provided with a reciprocating unit. When the end of the BC cell moves to the air channel generating unit, the reciprocating unit can drive the air channel generating unit to rise, so as to avoid the air channel generating unit from colliding with the end of the BC cell. Then the reciprocating unit can also drive the air channel generating unit to fall, so that the air channel generating unit contacts the end face of the BC cell and the carrier film composite, thus ensuring the composite effect between the BC cell and the carrier film. Attached Figure Description

[0027] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0028] Figure 1 This is a schematic diagram of the structure of the BC battery cell carrier film composite device according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the airway generation unit and reciprocating unit according to an embodiment of the present invention;

[0030] Figure 3 According to the embodiments of this utility model Figure 2 A magnified view of a section at point A in the middle;

[0031] Figure 4 This is a schematic diagram of the extrusion protrusion according to an embodiment of the present invention;

[0032] Figure 5 This is a structural schematic diagram of the conveying platform and the composite component according to an embodiment of the present utility model.

[0033] Figure label:

[0034] 1-Airway generating unit; 11-First roller body; 12-Airway generating component; 121-Piercing part; 13-First damping layer; 131-Extrusion protrusion; 132-Assembly hole; 14-Rotating shaft;

[0035] 2-Exhaust unit; 21-Second roller; 22-Second damping layer;

[0036] 3-Reciprocating unit; 31-Drive unit; 32-Cam; 33-Rolling element; 34-Transmission element; 35-Guide shaft; 36-Spring; 37-Pressure block;

[0037] 4-Transfer platform;

[0038] 5-Component to be composited; 51-Welding strip; 52-Carrier film; 53-BC cell. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0040] In the field of photovoltaic module manufacturing, the composite process of BC cell 53 and carrier film 52 is a process that tightly binds the two together to form a whole, which is crucial to the performance and production efficiency of photovoltaic modules.

[0041] BC cell 53 (Back Contact, BC) is short for back-contact solar cell. The bonding of BC cell 53 with the carrier film 52 refers to the process of adhering and connecting the BC cell 53 and the carrier film 52 together as a single unit. For example... Figure 5 As shown, the composite component 5 includes an uncomposite BC solar cell 53 and a carrier film 52. The carrier film 52 is a thin film material with specific properties. During the composite process, it is tightly bonded to the BC solar cell 53 and plays an important role in protection, support, electrical insulation, and optical performance optimization.

[0042] Figure 1 This is a structural schematic diagram of a BC battery cell carrier film composite device according to an embodiment of the present invention. Figure 1 As shown, the BC solar cell carrier film lamination equipment includes an air channel generation unit 1 and an exhaust unit 2. The composite material 5 to be laminated moves on the conveying platform 4 toward the air channel generation unit 1 and the exhaust unit 2. The air channel generation unit 1 and the exhaust unit 2 are arranged sequentially along the conveying direction of the conveying mechanism on the conveying platform 4.

[0043] like Figure 2 and Figure 3 As shown, the air passage generation unit 1 includes a first roller body 11 and an air passage generation component 12 disposed on the circumferential surface of the first roller body 11.

[0044] The first roller body 11 is mounted on the rotating shaft 14 and rotates under the drive of the rotating shaft 14. The first roller body 11 can be made of stainless steel and plated with hard chrome to improve wear resistance; the air passage generating component 12 can be fixed to the surface of the first roller body 11 by welding or embedding.

[0045] The air channel generating component 12 has an elongated structure, and multiple air channel generating components 12 are arranged around the circumferential surface of the first roller body 11. The air channel generating component 12 includes a piercing portion 121; during the relative movement between the conveying platform 4 and the first roller body 11, the piercing portion 121 of the air channel generating component 12 pierces the carrier film 52, forming an exhaust channel on the carrier film 52. The specific process of forming the exhaust channel is as follows: the conveying platform 4 conveys the composite part 5 to the position of the air channel generating unit 1, the air channel generating component 12 contacts the composite part 5, and the piercing portion 121 pierces the carrier film 52; the piercing portion 121 moves in a circular motion under the drive of the first roller body 11, and at the same time, the carrier film 52 passes under the piercing portion 121 under the conveying platform 4, and the piercing portion 121 continuously pierces the carrier film 52 to form an exhaust channel. The height of the airway generator 12 is 0.1 mm to 0.5 mm, for example, the height of the airway generator 12 is 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0046] The venting unit 2 is used to expel air bubbles between the carrier film 52 and the BC battery cell 53. The composite part 5 moves to the venting unit 2 under the drive of the conveying platform 4. The venting unit 2 expels the air bubbles between the carrier film 52 and the BC battery cell 53 from the venting channel by squeezing the carrier film 52 and the BC battery cell 53.

[0047] Compared to existing technologies, in the BC cell carrier film composite equipment of the exemplary embodiment of this utility model, it is not necessary to pre-drill holes in the carrier film 52. During the composite process of the BC cell 53 and the carrier film 52, the formation of venting channels on the carrier film 52 and the removal of air bubbles between the BC cell 53 and the carrier film 52 can be completed simultaneously, avoiding additional drilling processes and thus effectively improving the air bubble removal rate.

[0048] In this embodiment, the airway generation unit 1 further includes a heating element (not shown in the figure) and a first damping layer 13.

[0049] The heating element is used to heat the air passage generating component 12; the heating element can be an electric heating wire, or it can be heated by induction heating, and the heating temperature control accuracy is [insert accuracy here]. ± 2℃.

[0050] The heating element heats the airway forming component 12, raising the temperature of the puncture portion 121 to 150°C to 200°C. For example, after heating, the temperature of the puncture portion 121 is 150°C, 180°C, or 200°C. The airway forming component 12 can be made of a thermally conductive hard material, such as a metal with good thermal conductivity. Specifically, the airway forming component 12 can be made of a copper alloy. The puncture portion 121 can be an angular structure, such as a triangular prism structure, with the puncture portion 121 being one corner of the triangular prism. The corner of the puncture portion 121 is rounded, and after heating, the rounded puncture portion 121 punctures the carrier film 52 without damaging the BC battery cell 53.

[0051] like Figure 3 As shown, the first damping layer 13 is sleeved on the first roller body 11; the first damping layer 13 has an assembly hole 132, which is disposed opposite to the air passage generating component 12; the air passage generating component 12 is disposed in the assembly hole 132.

[0052] When the composite part 5 is transported to the position of the first roller 11, the first damping layer 13 deforms during the contact process with the composite part 5, causing the piercing part 121 to protrude out of the assembly hole 132 and pierce the carrier film 52.

[0053] like Figure 2 and Figure 3 As shown, the airway generating components 12 are arranged in pairs.

[0054] When the air passage generating element 12 pierces the carrier membrane 52, each pair of air passage generating elements 12 forms a first projection and a second projection on the plane where the welding strip 51 is located. The welding strip 51 is located between the first projection and the second projection. Preferably, the welding strip 51 is located in the middle position of the first projection and the second projection, so that the exhaust channel generated by the air passage generating element 12 is set close to the welding strip 51.

[0055] When the BC solar cell is laminated with the carrier film 52, bubbles are more likely to form in the area of ​​the solder ribbon 51 because the materials of the solder ribbon 51, the BC solar cell 53, and the carrier film 52 are different. When pressure and heat are applied to the BC solar cell 53 and the carrier film 52, the bubbles between the BC solar cell 53 and the carrier film 52 will move towards the direction of lower pressure, that is, they will gather in the area of ​​the solder ribbon 51 where there are more bubbles. Therefore, setting the exhaust channel close to the solder ribbon 51 helps to improve the bubble removal efficiency and the amount of bubbles removed.

[0056] Figure 2 and Figure 3 As shown, the first damping layer 13 includes extrusion protrusions 131, which are disposed near the air passage generating member 12; along the axial direction of the first roller body 11, each pair of air passage generating members 12 has an extrusion protrusion 131 at both ends, and the extrusion protrusions 131 are disposed opposite to the air passage generating member 12; the end face of the extrusion protrusion 131 that extrudes the bearing film 52 is inclined, and the end of the inclined surface away from the air passage generating member 12 is higher than the end near the air passage generating member 12.

[0057] The end face of the extrusion protrusion 131 that extrudes the carrier film 52 is inclined. Thus, the extrusion force exerted by the end of the extrusion protrusion 131 away from the air passage generator 12 on the BC battery cell 53 and the carrier film 52 is greater than the extrusion force exerted by the end of the extrusion protrusion 131 near the air passage generator 12 on the BC battery cell 53 and the carrier film 52. This causes the bubbles to move toward the end of the extrusion protrusion 131 near the air passage generator 12. Since the end of the extrusion protrusion 131 near the air passage generator 12 is close to the exhaust channel, the bubbles move toward the exhaust channel and are eventually discharged from the exhaust channel.

[0058] The initial expulsion of bubbles is achieved through the squeezing action of the extrusion protrusion 131. Then, the exhaust unit 2 further expels the bubbles, discharging them from the exhaust channel and improving the bubble discharge efficiency. In this embodiment, the extrusion protrusion 131 and the first damping layer 13 can be made of the same material, and they can be integrally formed. For example, the extrusion protrusion 131 and the first damping layer 13 can be made of silicone rubber.

[0059] Figure 1 As shown, the venting unit 2 includes a second roller 21 and a second damping layer 22, with the second damping layer 22 sleeved on the second roller 21. For example, the second damping layer 22 is made of silicone rubber, and its surface is smooth. During the rotation of the second roller 21, the second damping layer 22 compresses the composite material 5, expelling air bubbles between the BC solar cell 53 and the carrier film 52 from the venting channel, thus completing the composite process of the BC solar cell 53 and the carrier film 52.

[0060] In the direction perpendicular to the carrier membrane 52, the minimum distance between the exhaust unit 2 and the carrier membrane 52 is less than the minimum distance between the air passage generation unit 1 and the carrier membrane 52.

[0061] The small gap between the exhaust unit 2 and the carrier membrane 52 means that when the composite part 5 passes through the bottom of the exhaust unit 2, the second damping layer 22 exerts a greater compressive force on the composite part 5, which helps to expel air bubbles.

[0062] During processing, there are gaps between the BC solar cells 53. If the first roller 11 is at a fixed height, it may come into contact with the ends of the BC solar cells 53, affecting subsequent processing. To solve this problem, such as... Figure 1 and Figure 2 As shown, the composite equipment for the BC cell 53 carrier film 52 described in this embodiment also includes a reciprocating unit 3, which is arranged in a direction perpendicular to the carrier film 52. The reciprocating unit 3 is used to drive the first roller 11 to rise and fall.

[0063] When the end of the composite part 5 moves to the first roller 11, the reciprocating unit 3 drives the first roller 11 to rise, so as to prevent the piercing part 121 from colliding with the end of the composite part 5. Then, under the transmission of the conveying platform 4, after the end of the composite part 5 passes under the piercing part 121, the reciprocating unit 3 drives the first roller 11 to fall, so that the air passage generation unit 1 forms an exhaust channel on the carrier film 52.

[0064] Furthermore, such as Figure 2 As shown, the reciprocating unit 3 includes a drive unit 31, a cam 32, a rolling element 33, and a transmission element 34; the transmission element 34 is disposed at both ends of the first roller body 11; the rolling element 33 is disposed on the transmission element 34; the cam 32 is disposed at the output end of the drive unit 31, and the cam 32 abuts against the rolling element 33.

[0065] The drive unit 31 drives the cam 32 to rotate, the cam 32 drives the rolling element 33 to rise or fall, the rolling element 33 further drives the transmission element 34 to rise or fall, and the transmission element 34 drives the first roller body 11 to rise or fall.

[0066] The cam cycle of cam 32 is matched with the conveying rhythm of the composite component 5, the width of the BC battery cell 53, and the movement requirements of the first roller 11 to ensure the smooth progress of the entire composite process, thereby avoiding damage to the battery cell by the air passage generator 12 and ensuring the exhaust effect.

[0067] like Figure 2As shown, the reciprocating unit 3 also includes a guide shaft 35, a spring 36, and a pressure block 37. The guide shaft 35 is set at both ends of the conveying platform 4, and the line connecting the two guide shafts 35 is perpendicular to the conveying direction of the conveying platform 4. The guide shaft 35 passes through the transmission component 34 and guides the rising and falling motion of the first roller 11. The guide shaft 35 can reduce the shaking and offset during the movement, so that the movement of the cam 32 can be more stable. A pressure block 37 is set at the upper end of the guide shaft 35, and a spring 36 is set between the transmission component 34 and the pressure block 37. The spring 36 can play a role in buffering and shock absorption.

[0068] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A BC solar cell carrier film composite device, characterized in that, It includes an airway generation unit (1) and an exhaust unit (2); The air passage generating unit (1) includes a first roller body (11) and an air passage generating component (12) disposed on the circumferential surface of the first roller body (11); the air passage generating component (12) includes a piercing part (121); the piercing part (121) is used to pierce the carrier film (52) and form an exhaust channel on the carrier film (52); The exhaust unit (2) is used to expel air bubbles between the carrier membrane (52) and the BC battery cell (53).

2. The BC battery cell carrier film composite equipment according to claim 1, characterized in that, The airway generating unit (1) further includes a heating element for heating the airway generating element (12); During the rolling process of the first roller (11), the heated piercing part (121) pierces the carrier film (52) to form an exhaust channel.

3. The BC battery cell carrier film composite equipment according to claim 1, characterized in that, The air passage generating unit (1) further includes a first damping layer (13), which is sleeved on the first roller body (11); the first damping layer (13) has an assembly hole (132), and the air passage generating component (12) is disposed in the assembly hole (132).

4. The BC battery cell carrier film composite equipment according to claim 1, characterized in that, The puncture portion (121) has a rounded corner facing the support membrane (52).

5. The BC battery cell carrier film composite equipment according to claim 1, characterized in that, The airway generating components (12) are arranged in pairs; When the airway generating element (12) pierces the carrier membrane (52), each pair of airway generating elements (12) forms a first projection and a second projection on the plane where the solder strip (51) is located, and the solder strip (51) is located between the first projection and the second projection.

6. The BC solar cell carrier film composite equipment according to claim 3, characterized in that, The first damping layer (13) includes extrusion protrusions (131) disposed adjacent to the airway generator (12); The end face of the extrusion protrusion (131) that extrudes the bearing membrane (52) is inclined, and the end of the inclined surface away from the airway generator (12) is higher than the end close to the airway generator (12).

7. The BC solar cell carrier film composite equipment according to claim 1, characterized in that, The exhaust unit (2) includes a second roller body (21) and a second damping layer (22), the second damping layer (22) being sleeved on the second roller body (21).

8. The BC solar cell carrier film composite equipment according to claim 1, characterized in that, In the direction perpendicular to the carrier membrane (52), the minimum distance between the exhaust unit (2) and the carrier membrane (52) is less than the minimum distance between the air passage generation unit (1) and the carrier membrane (52).

9. The BC battery cell carrier film composite equipment according to claim 1, characterized in that, It also includes a reciprocating unit (3), which can drive the first roller (11) to rise and fall in a direction perpendicular to the carrier film (52).

10. The BC solar cell carrier film composite equipment according to claim 9, characterized in that, The reciprocating unit (3) includes a drive unit (31), a cam (32), a rolling element (33), a transmission element (34), a guide shaft (35), a spring (36), and a pressure block (37); The transmission component (34) is disposed at both ends of the first roller body (11); the rolling element (33) is disposed on the transmission component (34); the cam (32) abuts against the rolling element (33); the cam (32) is disposed at the output end of the drive unit (31); the guide shaft (35) passes vertically through the transmission component (34) to provide motion guidance for the transmission component (34); the pressure block (37) is disposed at the upper end of the guide shaft (35); the spring (36) is disposed between the transmission component (34) and the pressure block (37); The first roller (11) rises and falls under the drive and guidance of the transmission component (34) and the guide shaft (35).

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