Production apparatus for solar cell and method for manufacturing solar cell

Abstract

The application relates to a solar cell production device and a solar cell preparation method. The solar cell production device comprises a bordering unit for bordering a solar cell substrate with a first photosensitive adhesive layer on the front surface and a second photosensitive adhesive layer on the back surface to form a third photosensitive adhesive layer on the side surface of the solar cell substrate; and a printing unit for exposing and printing a first non-grid line area of the first photosensitive adhesive layer and a second non-grid line area of the second photosensitive adhesive layer, and solidifying the third photosensitive adhesive layer at the same time of the exposure and printing. The application effectively shortens the production time, improves the production efficiency, and reduces the production cost.

Description

Technical Field

[0001] This application relates to the field of solar cell manufacturing, and in particular to a solar cell production equipment and a method for preparing solar cells. Background Technology

[0002] The current copper interconnect manufacturing process includes the following steps: incoming yellow film solar cells - front-side coating - drying - back-side coating - drying - front-side printing - flipping - back-side printing - development - edge binding - drying - electroplating. The coating process involves applying adhesive to both sides of the incoming yellow film solar cells and then baking and curing them in an oven. The printing process involves laser printing on the coated cells, using a printing light source to illuminate the adhesive film on the cell surface, and using a mask with the printed pattern to etch the pattern onto the cell. First, the electrode pattern is printed on the front side of the cell, and then, after flipping, the electrode pattern is printed on the back side. The development process reveals the grooves formed by the printed pattern. The principle is that the printing light source cures the adhesive coating, and during the printing process, the pattern on the mask blocks the light, preventing some of the adhesive coating from being illuminated. This portion of the adhesive coating can be removed by the developer, while the adhesive coating cured by the printing light source cannot be removed by the developer. After development, the electrode pattern formed by the grooves is obtained, facilitating the subsequent growth of copper grid lines in the grooves. The purpose of edge banding is to wrap the edges of the solar cells with edge banding adhesive, and then bake and cure them in an oven to prevent copper and tin from being plated on the edges during the subsequent electroplating process, which would affect the overall appearance and efficiency of the solar cells. After edge banding, the cells are moved to the subsequent electroplating process for electroplating treatment, where copper grid lines are grown in the grooves.

[0003] The above-mentioned battery cell manufacturing methods are generally time-consuming, require a lot of production equipment, and have high production costs. Summary of the Invention

[0004] This application provides a solar cell production equipment and a solar cell preparation method, which effectively shortens production time, improves production efficiency, and reduces production costs.

[0005] In a first aspect, the solar cell manufacturing equipment provided in the embodiments of this application includes:

[0006] An edge-sealing unit is used to seal the edge of a solar cell substrate having a first photosensitive adhesive layer on the front and a second photosensitive adhesive layer on the back, so as to form a third photosensitive adhesive layer on the side of the solar cell substrate; and

[0007] The printing unit is used to expose and print the first non-grid area of ​​the first photosensitive adhesive layer and the second non-grid area of ​​the second photosensitive adhesive layer, and to cure the third photosensitive adhesive layer simultaneously with the exposure and printing.

[0008] In some embodiments, the printing unit includes:

[0009] A printing platform for fixing the solar cell substrate;

[0010] A first printing component, disposed above the printing platform, is used to perform the exposure printing on the first non-grid line area of ​​the first photosensitive adhesive layer; and

[0011] The second printing component is located below the printing platform and is used to perform the exposure printing on the second non-grid line area of ​​the second photosensitive adhesive layer;

[0012] The first printing component and the second printing component are also used to cure the third photosensitive adhesive layer.

[0013] In some embodiments, the printing platform includes:

[0014] The platform body is supported at the lower end of the solar cell substrate, and the second non-gateline region of the second photosensitive adhesive layer is exposed in the platform body; and

[0015] A vacuum adsorption section is formed on the platform body and is used to fix the solar cell substrate to the platform body.

[0016] In some embodiments, the first projection of the platform body in the vertical direction lies within the second projection of the solar cell substrate in the vertical direction.

[0017] In some embodiments, the first printing component includes a first printing light source and a first mask, wherein the first printing light source is disposed above the first mask;

[0018] The second printing component includes a second printing light source and a second mask, wherein the second printing light source is located below the second mask.

[0019] In some embodiments, the printing unit further includes a driving component for driving the printing platform to move relative to the first printing component and the second printing component to a first position or a second position. The first position and the second position are arranged sequentially in a direction away from the edge-binding unit. The printing platform in the first position is not located between the first printing component and the second printing component, and the printing platform in the second position is located between the first printing component and the second printing component.

[0020] The production equipment further includes a first moving unit, which is used to move the solar cell substrate with the third photosensitive adhesive layer formed thereon from the edge-sealing unit to the printing platform located at the first position.

[0021] In some embodiments, the driving component is further configured to drive the printing platform to move the solar cell substrate, which has been exposed and printed by the printing unit, to a third position. The second and third positions are arranged sequentially along a direction away from the edge-sealing unit, and the printing platform at the third position is not located between the first printing component and the second printing component.

[0022] The production equipment further includes a second moving unit, which is used to move the solar cell substrate on the printing platform at the third position to the first workstation.

[0023] In some embodiments, the side surface includes two opposing first side surfaces and two opposing second side surfaces;

[0024] The edge-sealing unit includes a support platform, which is used to support the movement of the solar cell substrate;

[0025] The edge-binding unit further includes a first edge-binding component and a second edge-binding component arranged sequentially along the moving direction of the bearing platform;

[0026] The first edge-sealing assembly includes first edge-sealing wheels that correspond one-to-one with the first side surface. The two first edge-sealing wheels can simultaneously contact the moving solar cell substrate to form the third photosensitive adhesive layer on the corresponding first side surface.

[0027] The second edge-sealing assembly includes second edge-sealing wheels that are arranged one-to-one with the second side. The two second edge-sealing wheels can simultaneously contact the moving solar cell substrate to form the third photosensitive adhesive layer on the corresponding second side.

[0028] In some embodiments, the support platform is also used to support the rotation of the solar cell substrate so that the second side of the solar cell substrate can contact the corresponding second edge wheel.

[0029] Secondly, the method for preparing a solar cell provided in the embodiments of this application includes:

[0030] A solar cell substrate is provided, wherein the front side of the solar cell substrate has a first photosensitive adhesive layer and the back side of the solar cell substrate has a second photosensitive adhesive layer;

[0031] The solar cell substrate is edged to form a third photosensitive adhesive layer on the side of the solar cell substrate;

[0032] The first non-grid area of ​​the first photosensitive adhesive layer and the second non-grid area of ​​the second photosensitive adhesive layer are exposed and printed, and the third photosensitive adhesive layer is cured simultaneously with the exposure and printing.

[0033] Compared with the prior art, the beneficial effects of the embodiments of this application are as follows: The solar cell production equipment and the method for preparing the solar cell include an edge-wrapping unit for wrapping the edge of a solar cell substrate having a first photosensitive adhesive layer on the front and a second photosensitive adhesive layer on the back, so as to form a third photosensitive adhesive layer on the side of the solar cell substrate; and a printing unit for exposing and printing the first non-grid area of ​​the first photosensitive adhesive layer and the second non-grid area of ​​the second photosensitive adhesive layer, and curing the third photosensitive adhesive layer at the same time as the exposure and printing. Through the embodiments of this application, the solar cell substrate is first edge-wrapped and then printed, which can print the front and back of the solar cell substrate at the same time. Furthermore, the third photosensitive adhesive layer can be cured at the same time as printing, which not only effectively shortens the production time and improves the production efficiency, but also simplifies the production steps, reduces the production equipment, and effectively reduces the production cost. Attached Figure Description

[0034] Figure 1 This is a front view schematic diagram of the solar cell production equipment according to an embodiment of this application;

[0035] Figure 2 for Figure 1 A magnified view of a portion of the A structure;

[0036] Figure 3 This is a partial top view of the solar cell production equipment according to an embodiment of this application;

[0037] Figure 4 for Figure 3 A magnified view of the local structure;

[0038] Figure 5 for Figure 4 A magnified view of the local B structure;

[0039] Wherein: 1-Solar cell substrate (101-First photosensitive adhesive layer, 102-Second photosensitive adhesive layer, 103-Third photosensitive adhesive layer, 104-First side surface, 105-Second side surface), 2-Edging unit (201-Bearing platform, 202-First edging assembly (2021-First edging wheel), 203-Second edging assembly (2031-Second edging wheel)), 3-Printing unit (301-Printing platform (3011-Platform body (30111-Knockout section), 3012- Vacuum adsorption unit (30121-adsorption tank, 30122-vacuum hole), 302-first printing component (3021-first printing light source, 3022-first mask), 303-second printing component (3031-second printing light source, 3032-second mask), 304-drive component, 305-platform support, 306-sliding guide rail), 4-first moving unit, 5-second moving unit, 6-first camera, 7-second camera, 8-direct drive rotary motor. Detailed Implementation

[0040] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0041] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0043] Please refer to Figure 1 and Figure 2The solar cell manufacturing equipment of this application embodiment is used to sequentially edge-wrap and print on a solar cell substrate 1. The solar cell substrate 1 has a front side and a back side disposed opposite to each other, and also has a side side connecting the front side and the back side. A first photosensitive adhesive layer 101 is formed on the front side of the solar cell substrate 1, and a second photosensitive adhesive layer 102 is formed on the back side of the solar cell substrate 1. The solar cell manufacturing equipment includes an edge-wrapping unit 2 and a printing unit 3. The edge-wrapping unit 2 is used to edge-wrap the solar cell substrate 1, thereby forming a third photosensitive adhesive layer 103 on the side side of the solar cell substrate 1. The printing unit 3 is used to expose and print on a first non-grid area of ​​the first photosensitive adhesive layer 101 and a second non-grid area of ​​the second photosensitive adhesive layer 102, and the printing unit 3 is also used to cure the third photosensitive adhesive layer 103 simultaneously with the exposure and printing.

[0044] In this embodiment, the solar cell substrate 1 is first edged by the edge-wrapping unit 2, and then the front and back sides of the solar cell substrate 1 are simultaneously exposed and printed by the printing unit 3. Since the third photosensitive adhesive layer 103 is a photocurable adhesive, the printing unit 3 can also cure the third photosensitive adhesive layer 103 while it is being exposed and printed, eliminating the need to dry the edge-wrapping adhesive and thus omitting the drying process. This not only effectively shortens the production time and improves production efficiency, but also simplifies the production steps and effectively reduces production costs.

[0045] In some implementation methods, please refer to Figure 1 The printing unit 3 includes a printing platform 301, a first printing component 302, and a second printing component 303. The printing platform 301 supports and fixes the solar cell substrate 1. The first printing component 302 is positioned above the printing platform 301 and corresponds to the first photosensitive adhesive layer 101. The first printing component 302 is used to expose and print the first non-grid line area of ​​the first photosensitive adhesive layer 101. The second printing component 303 is positioned below the printing platform 301 and corresponds to the second photosensitive adhesive layer 102. The second printing component 303 is used to expose and print the second non-grid line area of ​​the second photosensitive adhesive layer 102. The first printing component 302 and the second printing component 303 can also simultaneously cure a third photosensitive adhesive layer 103 while exposing and printing the corresponding non-grid line areas of the photosensitive adhesive layer.

[0046] In this embodiment, while the first printing component 302 exposes and prints the first non-grid line area of ​​the first photosensitive adhesive layer 101, the second printing component 303 also exposes and prints the second non-grid line area of ​​the second photosensitive adhesive layer 102. Furthermore, the third photosensitive adhesive layer 103 is a photocurable adhesive. Both the first printing component 302 and the second printing component 303 can cure the third photosensitive adhesive layer 103 during the exposure and printing processes, thereby effectively improving production efficiency.

[0047] In some implementation methods, please refer to Figure 1 The first printing component 302 includes a first printing light source 3021 and a first mask 3022, with the first printing light source 3021 positioned above the first mask 3022. A first electrode pattern is formed on the first mask 3022. A light beam emitted from the first printing light source 3021 passes through the first mask 3022 and illuminates a first non-grid line area of ​​the first photosensitive adhesive layer 101, thus exposing and printing the first non-grid line area of ​​the first photosensitive adhesive layer 101. The light beam emitted from the first printing light source 3021 can also illuminate a third photosensitive adhesive layer 103, thereby curing the third photosensitive adhesive layer 103.

[0048] In some implementation methods, please refer to Figure 1 The second printing assembly 303 includes a second printing light source 3031 and a second mask 3032, with the second printing light source 3031 positioned below the second mask 3032. A second electrode pattern is formed on the second mask 3032. The light beam emitted by the second printing light source 3031 passes through the second mask 3032 and illuminates the second non-gateline region of the second photosensitive adhesive layer 102, exposing and printing the second non-gateline region of the second photosensitive adhesive layer 102. The light beam emitted by the second printing light source 3031 can also illuminate the third photosensitive adhesive layer 103, thereby curing the third photosensitive adhesive layer 103.

[0049] In some implementation methods, please refer to Figures 3 to 5 The printing platform 301 includes a platform body 3011 and a vacuum adsorption unit 3012. The platform body 3011 is supported at the lower end of the solar cell substrate 1. The vacuum adsorption unit 3012 is formed on the platform body 3011 and can adsorb and fix the solar cell substrate 1 onto the platform body 3011.

[0050] As one implementation method, please refer to Figure 5The vacuum adsorption unit 3012 may include an adsorption tank 30121 and a vacuum extraction hole 30122. The adsorption tank 30121 is formed on the upper surface of the printing platform 301 body. In order to more effectively adsorb the solar cell substrate 1, the vacuum extraction hole 30122 is formed in the adsorption tank 30121 and is connected to a vacuum pump. The vacuum pump can evacuate the adsorption tank 30121, thereby adsorbing the solar cell substrate 1 placed on the upper end of the platform body 3011 onto the platform body 3011.

[0051] As one implementation method, please refer to Figure 4 To avoid obstructing the second printing light source 3031, the platform body 3011 has a hollow frame structure with a cutout 30111 vertically penetrating it. The second non-grid line area of ​​the second photosensitive adhesive layer 102 is exposed on the platform body 3011, allowing the light beam emitted by the second printing light source 3031 to pass through the second mask 3032 and expose the second non-grid line area of ​​the second photosensitive adhesive layer 102.

[0052] As one implementation method, please refer to Figure 2 and Figure 4 The first projection of the platform body 3011 in the vertical direction is located within the second projection of the solar cell substrate 1 in the vertical direction, thereby avoiding the platform body 3011 from blocking the third photosensitive adhesive layer 103, which would prevent the light beam emitted by the second printing light source 3031 from illuminating the third photosensitive adhesive layer 103.

[0053] In some embodiments, the positions of the first printing component 302 and the second printing component 303 remain unchanged in the first direction, while the printing platform 301 can move along the first direction. Please refer to... Figure 1 The printing unit 3 also includes a driving component 304. The driving component 304 drives the printing platform 301 to move relative to the first printing component 302 and the second printing component 303 along a first direction to a first position. The driving component 304 also drives the printing platform 301 to move relative to the first printing component 302 and the second printing component 303 along the first direction to a second position. The first position and the second position are sequentially arranged along a direction away from the edge-sealing unit 2. The first position is the feeding position, where the printing platform 301 is not located between the first printing component 302 and the second printing component 303. The second position is the printing position, where the printing platform 301 is located between the first printing component 302 and the second printing component 303. Please refer to [reference needed]. Figure 1 and Figure 3 As shown, Figure 1 and Figure 3The printing platform 301 is in the second position. When the printing platform 301 is in the second position, the first printing component 302 and the second printing component 303 can expose and print the first non-grid area of ​​the first photosensitive adhesive layer 101 and the second non-grid area of ​​the second photosensitive adhesive layer 102, and simultaneously cure the third photosensitive adhesive layer 103. The production equipment also includes a first moving unit 4, which can move the solar cell substrate 1 with the third photosensitive adhesive layer 103 formed on it from the edge-sealing unit 2 to the printing platform 301 in the first position. That is, the first moving unit 4 can move the solar cell substrate 1 processed by the edge-sealing unit 2 from the edge-sealing unit 2 to the printing platform 301 in the first position, thereby realizing the loading of the printing unit 3.

[0054] In one implementation, the driving component 304 is also used to drive the printing platform 301 to move relative to the first printing component 302 and the second printing component 303 to a third position. The second and third positions are arranged sequentially along the direction away from the edge-sealing unit 2, and the third position is the unloading position, where the printing platform 301 is not located between the first printing component 302 and the second printing component 303. After printing is completed, the driving component 304 drives the printing platform 301, carrying the solar cell substrate 1 exposed and printed by the printing unit 3, to move to the third position. Please refer to... Figure 1 and Figure 3 The production equipment also includes a second moving unit 5, which is used to remove the solar cell substrate 1 from the printing platform 301 in the third position, thereby completing the unloading of the printing unit 3.

[0055] As an example, please refer to Figure 1 The printing platform 301 is mounted on the platform support 305, which is connected to the drive component 304. The drive component 304 can be a linear motor, which can drive the platform support 305 to move the printing platform 301 on the sliding guide rail 306 to the first position, the second position, or the third position.

[0056] It should be noted that linear motors are existing technology and will not be described in detail. In other embodiments, the drive component 304 may also have other structures, which can be set according to the actual situation, and will not be described in detail here.

[0057] As an example, please refer to Figure 1 and Figure 3The edge-binding unit 2 and the printing unit 3 can be arranged sequentially along a first direction, which is perpendicular to the vertical direction. The first moving unit 4 may include a first suction cup, which can move along the first direction to move the solar cell substrate 1 between the edge-binding unit 2 and the printing unit 3. The first suction cup can also move up and down along the vertical direction to pick up the edge-binding unit 2 after edge-binding or place the solar cell substrate 1 on the printing unit 3 at the first position. The second moving unit 5 may include a second suction cup, which can move along the first direction to move the solar cell substrate 1 between the printing unit 3 and other processing units. The second suction cup can also move up and down along the vertical direction to pick up the exposure-printed solar cell substrate 1 on the printing unit 3 at the third position or place the solar cell substrate 1 on other processing units.

[0058] It should be noted that the first moving unit 4 and the second moving unit 5 can also be other structures, which can be set according to the actual situation, and will not be elaborated here.

[0059] As an example, the working principle of the solar cell production equipment is as follows: The edge-wrapping unit 2 is used to wrap the solar cell substrate 1, forming a third photosensitive adhesive layer 103 on the side of the solar cell substrate 1. After the edge wrapping is completed, the first moving unit 4 moves the solar cell substrate 1 to the printing platform 301 at the first position. The printing platform 301 is vacuumed to adsorb and fix the solar cell substrate 1, and carries the solar cell substrate 1 to the second position. Then, the first printing component 302 and the second printing component 303 simultaneously expose and print the first photosensitive adhesive layer 101 and the second photosensitive adhesive layer 102, and simultaneously cure the third photosensitive adhesive layer 103. After printing is completed, the printing platform 301 carries the solar cell substrate 1 to the third position and then breaks the vacuum. The second moving unit 5 removes the edge-wrapped and printed solar cell substrate 1 from the printing platform 301. The second moving unit 5 can move the solar cell substrate 1 to the first workstation, which can be the processing unit for the next process, or the second moving unit 5 can move the solar cell substrate 1 to other positions, which can be set according to the actual situation, and will not be elaborated here.

[0060] In some implementation methods, please refer to Figure 3The solar cell substrate 1 has two first side surfaces 104 and two second side surfaces 105. The two first side surfaces 104 and the two second side surfaces 105 are arranged opposite each other. The edge-sealing unit 2 includes a support platform 201, a first edge-sealing assembly 202, and a second edge-sealing assembly 203. The support platform 201 is used to support the solar cell substrate 1 to move along a first direction. As an example, the support platform 201 can be fixed to the solar cell substrate 1 by vacuum adsorption. The first edge-sealing assembly 202 and the second edge-sealing assembly 203 are arranged sequentially along the moving direction of the support platform 201, which is the first direction. The first edge-sealing assembly 202 includes two first edge-sealing wheels 2021, one of which is corresponding to one of the first side surfaces 104, and the other is corresponding to the other first side surface 104. During the movement of the solar cell substrate 1 carried by the support platform 201 along the first direction, the two first edge-sealing wheels 2021 can simultaneously contact the moving solar cell substrate 1, thereby forming a third photosensitive adhesive layer 103 on the corresponding first side 104. The second edge-sealing assembly 203 includes two second edge-sealing wheels 2031, one of which is correspondingly disposed with one of the second side 105, and the other is correspondingly disposed with the other second side 105. During the movement of the solar cell substrate 1 carried by the support platform 201 along the first direction, the two second edge-sealing wheels 2031 can simultaneously contact the moving solar cell substrate 1, thereby forming a third photosensitive adhesive layer 103 on the corresponding second side 105.

[0061] In this embodiment, two first edge-sealing wheels 2021 simultaneously form a third photosensitive adhesive layer 103 on two first side surfaces 104, and two second edge-sealing wheels 2031 simultaneously form a third photosensitive adhesive layer 103 on two second side surfaces 105. This not only ensures symmetrical force distribution on the solar cell substrate 1 during edge-sealing but also effectively improves production efficiency. Furthermore, during edge-sealing, the first edge-sealing wheels 2021 and the second edge-sealing wheels 2031 rotate only around their own axes, while the solar cell substrate 1 moves along a first direction, effectively preventing adhesive breakage and improving the product yield of the solar cell.

[0062] It should be noted that in other embodiments, the edge-binding unit 2 can be other structures, which can be set according to the actual situation, and will not be elaborated here.

[0063] As an example, a linear motor can be used to drive the carrier platform 201 to move along the first direction, or other driving mechanisms can be used to drive the carrier platform 201 to move along the first direction. The specific settings can be determined according to the actual situation, and will not be elaborated here.

[0064] As one implementation method, please refer to Figure 3The length of the first side 104 can be greater than the length of the second side 105. That is, in this embodiment, the long side of the solar cell substrate 1 is first wrapped, and then the short side of the solar cell substrate 1 is wrapped.

[0065] It should be noted that in other embodiments, the short side of the solar cell substrate 1 can be wrapped first, and then the long side of the solar cell substrate 1 can be wrapped. This can be set according to the actual situation, and will not be elaborated here.

[0066] As one implementation method, please refer to Figure 3 Two first edge-sealing wheels 2021 are symmetrically arranged on both sides of the support platform 201, and two second edge-sealing wheels 2031 are symmetrically arranged on both sides of the support platform 201. The first edge-sealing wheels 2021 and the second edge-sealing wheels 2031 are spaced apart in a first direction. To enable edge-sealing of the second side 105 after edge-sealing of the first side 104, the support platform 201 can rotate around its own axis. For example, please refer to... Figure 1 and Figure 3 In the initial state, the solar cell substrate 1 on the support platform 201 has two first side surfaces 104 extending along a first direction, allowing the first edge-wrapping assembly 202 to wrap around the first side surfaces 104 of the moving solar cell substrate 1. After the first edge-wrapping assembly 202 has finished wrapping the first side surfaces 104 of the solar cell substrate 1, and before the solar cell substrate 1 moves to the second edge-wrapping assembly 203, the support platform 201 can rotate the solar cell substrate 1 90° around the vertical axis, causing the two second side surfaces 105 to extend along the first direction, so that the second side surfaces 105 of the solar cell substrate 1 can contact the corresponding second edge-wrapping wheels 2031.

[0067] As an example, please refer to Figure 1 The carrier platform 201 can be driven to rotate by a direct drive rotary motor 8, or by other drive mechanisms. The specific settings can be determined based on the actual situation, and will not be elaborated here.

[0068] As an example, please refer to Figure 1The edge-sealing unit 2 may further include a first positioning component and a second positioning component. The first positioning component corresponds to the first edge-sealing component 202 and includes an electrically connected first camera 6 and a first motion module. The first edge-sealing component 202 can be connected to the first motion module. When the first camera 6 detects that the solar cell substrate 1 has reached a preset position, the first motion module can drive two first edge-sealing wheels 2021 to move towards each other along a second direction perpendicular to the first direction and the vertical direction, so that the two first edge-sealing wheels 2021 can simultaneously contact the corresponding first side surface 104 for edge-sealing. After completing the edge-sealing of the first side surface 104, the first motion module can also drive the two first edge-sealing wheels 2021 to move towards each other along the second direction to wait for the next edge-sealing. The second positioning component corresponds to the second edge-sealing component 203 and includes an electrically connected second camera 7 and a second motion module. The second edge-sealing component 203 can be connected to the second motion module. The working principle of the second positioning component is similar to that of the first positioning component and will not be described in detail here.

[0069] It should be noted that the first motion module, the first camera 6, the second motion module, and the second camera 7 can be existing technologies, and will not be elaborated here.

[0070] The method for preparing solar cells in this application is based on the solar cell production equipment provided in any of the above embodiments.

[0071] The method for fabricating solar cells according to embodiments of this application includes the following steps S10 to S30:

[0072] Step S10: A solar cell substrate 1 is provided. The front side of the solar cell substrate 1 has a first photosensitive adhesive layer 101, and the back side of the solar cell substrate 1 has a second photosensitive adhesive layer 102.

[0073] Step S20: The solar cell substrate 1 is edged to form a third photosensitive adhesive layer 103 on the side of the solar cell substrate 1.

[0074] Step S30: Exposure and printing are performed on the first non-grid area of ​​the first photosensitive adhesive layer 101 and the second non-grid area of ​​the second photosensitive adhesive layer 102, and the third photosensitive adhesive layer 103 is cured at the same time as exposure and printing.

[0075] In this embodiment, the solar cell substrate 1 is first edge-wrapped, and then the front and back sides of the solar cell substrate 1 are simultaneously exposed and printed. Since the third photosensitive adhesive layer 103 is a photocurable adhesive, the printing unit 3 can also cure the third photosensitive adhesive layer 103 while it is being exposed and printed, eliminating the need to dry the edge-wrapping adhesive and thus omitting the drying process. This not only effectively shortens the production time and improves production efficiency, but also simplifies the production steps, reduces production equipment, and effectively lowers production costs.

[0076] In some embodiments, step S10 includes the following steps S11 to S13:

[0077] Step S11: A solar cell substrate 1 is provided, the front side of the solar cell substrate 1 having a first metal seed layer and the back side of the solar cell substrate 1 having a second metal seed layer.

[0078] Step S12: A first photosensitive adhesive layer 101 is formed on the first metal seed layer.

[0079] Step S13: A second photosensitive layer 102 is formed on the second metal seed layer.

[0080] In some implementations, steps S40 to S50 are included after step S30:

[0081] Step S40: The first photosensitive adhesive layer 101 and the second photosensitive adhesive layer 102 after exposure and printing are developed to form patterned grooves on the first photosensitive adhesive layer 101 and the second photosensitive adhesive layer 102.

[0082] In step S50, metal grid lines are electroplated in the patterned grooves of the first photosensitive adhesive layer 101 and the patterned grooves of the second photosensitive adhesive layer 102.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above embodiments merely illustrate preferred implementations of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. Solar cell manufacturing equipment, characterized in that, include: An edge-sealing unit is used to seal the edge of a solar cell substrate having a first photosensitive adhesive layer on the front and a second photosensitive adhesive layer on the back, so as to form a third photosensitive adhesive layer on the side of the solar cell substrate. and The printing unit is used to expose and print the first non-grid area of ​​the first photosensitive adhesive layer and the second non-grid area of ​​the second photosensitive adhesive layer, and to cure the third photosensitive adhesive layer simultaneously with the exposure and printing.

2. The solar cell production equipment as described in claim 1, characterized in that, The printing unit includes: A printing platform for fixing the solar cell substrate; A first printing component, disposed above the printing platform, is used to perform the exposure printing on the first non-grid line area of ​​the first photosensitive adhesive layer; and The second printing component is located below the printing platform and is used to perform the exposure printing on the second non-grid line area of ​​the second photosensitive adhesive layer; The first printing component and the second printing component are also used to cure the third photosensitive adhesive layer.

3. The solar cell production equipment as described in claim 2, characterized in that, The printing platform includes: The platform body is supported at the lower end of the solar cell substrate, and the second non-gateline region of the second photosensitive adhesive layer is exposed in the platform body; and A vacuum adsorption section is formed on the platform body and is used to fix the solar cell substrate to the platform body.

4. The solar cell production equipment as described in claim 3, characterized in that, The first projection of the platform body in the vertical direction is located within the second projection of the solar cell substrate in the vertical direction.

5. The solar cell production equipment as described in claim 2, characterized in that, The first printing component includes a first printing light source and a first mask, wherein the first printing light source is disposed above the first mask; The second printing component includes a second printing light source and a second mask, wherein the second printing light source is located below the second mask.

6. The solar cell production equipment as described in claim 2, characterized in that, The printing unit further includes a driving component, which drives the printing platform to move relative to the first printing component and the second printing component to a first position or a second position. The first position and the second position are arranged sequentially along a direction away from the edge-binding unit. The printing platform in the first position is not located between the first printing component and the second printing component, and the printing platform in the second position is located between the first printing component and the second printing component. The production equipment further includes a first moving unit, which is used to move the solar cell substrate with the third photosensitive adhesive layer formed thereon from the edge-sealing unit to the printing platform located at the first position.

7. The solar cell production equipment as described in claim 6, characterized in that, The driving component is also used to drive the printing platform to move the solar cell substrate exposed and printed by the printing unit to a third position. The second position and the third position are arranged sequentially in a direction away from the edge-sealing unit. The printing platform in the third position is not located between the first printing component and the second printing component. The production equipment further includes a second moving unit, which is used to move the solar cell substrate on the printing platform at the third position to the first workstation.

8. The solar cell production equipment as described in claim 1, characterized in that, The side includes two first side surfaces arranged opposite to each other and two second side surfaces arranged opposite to each other; The edge-sealing unit includes a support platform, which is used to support the movement of the solar cell substrate; The edge-binding unit further includes a first edge-binding component and a second edge-binding component arranged sequentially along the moving direction of the bearing platform; The first edge-sealing assembly includes first edge-sealing wheels that correspond one-to-one with the first side surface. The two first edge-sealing wheels can simultaneously contact the moving solar cell substrate to form the third photosensitive adhesive layer on the corresponding first side surface. The second edge-sealing assembly includes second edge-sealing wheels that are arranged one-to-one with the second side. The two second edge-sealing wheels can simultaneously contact the moving solar cell substrate to form the third photosensitive adhesive layer on the corresponding second side.

9. The solar cell production equipment as described in claim 8, characterized in that, The support platform is also used to support the rotation of the solar cell substrate so that the second side of the solar cell substrate can contact the corresponding second edge wheel.

10. A method for preparing a solar cell, characterized in that, include: A solar cell substrate is provided, wherein the front side of the solar cell substrate has a first photosensitive adhesive layer and the back side of the solar cell substrate has a second photosensitive adhesive layer; The solar cell substrate is edged to form a third photosensitive adhesive layer on the side of the solar cell substrate; The first non-grid area of ​​the first photosensitive adhesive layer and the second non-grid area of ​​the second photosensitive adhesive layer are exposed and printed, and the third photosensitive adhesive layer is cured simultaneously with the exposure and printing.

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