A kind of TOPCON cell acid-base cleaning device

Abstract

The application relates to the technical field of battery acid-base cleaning, and particularly discloses a TOPCON battery acid-base cleaning device. In order to solve the problems of uneven cleaning and dead angles of TOPCON batteries, the device comprises a cleaning box, a bearing plate, a clamping assembly, a lifting mechanism and a rotary driving mechanism, the bearing plate is arranged above the cleaning box, the clamping assembly is rotationally arranged below the bearing plate, the clamping assembly is used for clamping and positioning a TOPCON battery piece, the lifting mechanism is arranged above the cleaning box, the bearing plate is installed on the lifting mechanism, the lifting mechanism is used for driving the bearing plate and the clamping assembly to move vertically, and the rotary driving mechanism is installed on the bearing plate and used for driving the clamping assembly to rotate below the bearing plate. The application enables the battery piece to move in liquid, greatly improves the uniformity and cleanliness of cleaning, and reduces the problems of uneven cleaning and dead angles of the battery piece.

Description

Technical Field

[0001] This application relates to the field of battery acid and alkali cleaning technology, and in particular to a TOPCON battery acid and alkali cleaning device. Background Technology

[0002] TOPCON (tunneling oxide passivated contact) solar cells, as a type of high-efficiency crystalline silicon solar cell, require extremely strict cleanliness standards during their manufacturing process. After texturing, diffusion, etching, and other pre-processing steps, various contaminants such as metal ions, organic matter, and particulate matter remain on the surface of the silicon wafer. These contaminants severely affect the quality and contact performance of the subsequent passivation layer, ultimately leading to a decrease in cell conversion efficiency. Therefore, a thorough cleaning of the silicon wafer is essential before depositing the passivation layer.

[0003] Currently, the industry generally adopts wet chemical cleaning processes based on the RCA standard, which involves immersing and cleaning silicon wafers with specific ratios of acid and alkali solutions (such as SC-1 and SC-2 solutions). Existing cleaning methods are mostly simple static immersion or single directional rotary rinsing. Although static immersion equipment is simple, the cleaning efficiency is low, especially for removing firmly attached contaminants, and it requires a long processing time, resulting in low production efficiency. While single directional rotary rinsing can generate some fluid shear force, it easily creates fixed flow field dead zones, leading to uneven cleaning in certain areas of the silicon wafer surface and affecting the consistency of product performance. Utility Model Content

[0004] To address the issue of uneven cleaning and dead zones in TOPCON batteries, this application provides an acid and alkali cleaning device for TOPCON batteries.

[0005] The TOPCON battery acid and alkali cleaning device provided in this application adopts the following technical solution:

[0006] A TOPCON battery acid and alkali cleaning device includes a cleaning tank and further includes...

[0007] A support plate is positioned above the cleaning tank;

[0008] A clamping assembly is rotatably disposed below the support plate, and the clamping assembly is used to clamp and position TOPCON battery cells;

[0009] A lifting mechanism is disposed above the cleaning tank, and the support plate is mounted on the lifting mechanism. The lifting mechanism is used to drive the support plate and the clamping assembly to move vertically.

[0010] A rotary drive mechanism, mounted on the support plate, is used to drive the clamping assembly to rotate below the support plate.

[0011] Furthermore, the clamping assembly includes a support shaft, a top plate, and two side plates;

[0012] The support shaft is rotatably connected to the underside of the bearing plate;

[0013] The top plate is fixedly connected to the bottom end of the support shaft;

[0014] The two side plates are vertically fixed to both ends of the top plate to form a clamping space for accommodating TOPCON battery cells;

[0015] The clamping space is provided with a movable positioning plate, and the side plate is provided with a set of fasteners for driving the positioning plate to move and locking it.

[0016] Furthermore, the fastener assembly includes a threaded rod and a handwheel. The threaded rod is threadedly connected to a side plate, one end of the threaded rod is fixedly connected to the handwheel, and the other end of the threaded rod is rotatably connected to a positioning plate.

[0017] Furthermore, the rotary drive mechanism includes a gear sleeved and locked on the support shaft, and a drive assembly for driving the gear to rotate.

[0018] The drive assembly includes a drive motor and a rack that meshes with a gear. The drive motor is used to drive the rack to reciprocate linearly along the length of the support plate.

[0019] Furthermore, a fixed frame is connected to the side wall of the bearing plate, and a movable frame is slidably disposed within the fixed frame. The movable frame is fixedly connected to the rack via a connecting arm.

[0020] The drive motor drives the moving frame to slide back and forth within the fixed frame via an eccentric transmission structure.

[0021] Furthermore, the eccentric transmission structure includes a rotating plate fixed to the output shaft of the drive motor and a push shaft fixed to the end of the rotating plate;

[0022] The push shaft extends into the inner cavity of the movable frame and can slide along its inner wall.

[0023] Furthermore, the inner top and bottom walls of the fixed frame are provided with sliding grooves, and the top and bottom of the movable frame are fixedly connected with sliders that cooperate with the sliding grooves.

[0024] Furthermore, the lifting mechanism includes a hydraulic cylinder, an L-shaped plate is fixedly connected to the side wall of the cleaning tank, the hydraulic cylinder is fixed at the end of the L-shaped plate away from the cleaning tank, and the output end of the hydraulic cylinder is fixedly connected to the bearing plate.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. During operation, the TOPCON solar cells are first clamped onto the clamping assembly. Then, the lifting mechanism lowers the support plate and the entire clamping assembly below it, immersing the solar cells in the chemical solution of the cleaning tank. Next, the rotation drive mechanism activates, driving the clamping assembly to rotate the solar cells within the cleaning solution, achieving dynamic cleaning. By moving the solar cells within the liquid, the uniformity and cleanliness of the cleaning are greatly improved, reducing the problem of uneven cleaning and dead zones.

[0027] 2. The U-shaped frame structure provides stable and reliable clamping, effectively preventing the fragile thin battery cells from shaking or breaking under the impact of high-speed rotating liquid. Simultaneously, the simple and open structure does not obstruct the surface of the battery cells, facilitating full contact and flow of the cleaning fluid with the cell surface, ensuring effective cleaning. The threaded drive has a self-locking characteristic, reliably locking at any position, ensuring that the clamping force will not loosen during cleaning; at the same time, the handwheel operation is labor-saving and precise, allowing easy control of the clamping tightness, ensuring a firm clamping while preventing the battery cells from being crushed due to excessive clamping force, achieving "non-destructive clamping."

[0028] 3. The drive motor drives the rack to perform linear reciprocating motion, which in turn drives the gear meshing with it to rotate alternately in both directions. The gear finally transmits this reciprocating rotational motion to the clamping component through the support shaft. This converts the unidirectional continuous rotation of the motor into the periodic forward and reverse rotation (reciprocating oscillation) of the clamping component. This motion mode can generate turbulence on the surface of the battery cell with the cleaning fluid, and the rinsing direction is constantly changing. Compared with unidirectional rotation, it can more effectively remove contaminants, completely eliminate cleaning dead corners, and achieve a more uniform and thorough cleaning effect. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a front view schematic diagram of the cleaning device according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the clamping assembly shown in the embodiment of this application;

[0032] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0033] Figure 4This is a schematic diagram of the rear structure of the cleaning device according to an embodiment of this application;

[0034] Figure 5 for Figure 4 A magnified structural diagram at point B in the middle.

[0035] Explanation of reference numerals in the attached drawings: 1. Cleaning tank; 2. Drain valve; 3. L-shaped plate; 4. Lifting mechanism; 5. Clamping assembly; 51. Support shaft; 52. Top plate; 53. Side plate; 54. Positioning plate; 55. Fastener assembly; 551. Threaded rod; 552. Handwheel; 6. Rotary drive mechanism; 61. Gear; 62. Drive assembly; 621. Drive motor; 622. Rack; 623. Fixed frame; 624. Moving frame; 625. Slide groove; 626. Slider; 627. Fixed arm; 628. Connecting arm; 63. Eccentric transmission structure; 631. Rotating plate; 632. Push shaft; 7. Bearing plate; 71. Fixed rod. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Therefore, the detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to represent selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0038] This application discloses a TOPCON battery acid and alkali cleaning device, referring to... Figure 1 It includes a cleaning tank 1, which is filled with cleaning fluid. A drain valve 2 is fixedly connected to the side wall of the cleaning tank 1, and the wastewater after cleaning the battery is discharged from the drain valve 2.

[0039] Reference Figure 1 and Figure 2 Two L-shaped plates 3 are fixedly connected to the back of the cleaning tank 1. A lifting mechanism 4 is fixedly connected to the end of the L-shaped plate 3 away from the cleaning tank 1. The lifting mechanism 4 is a hydraulic cylinder. The hydraulic cylinder is set vertically. A bearing plate 7 is fixedly connected to the output end of the hydraulic cylinder. The bearing plate 7 is set above the cleaning tank 1. TOPCON battery cells are clamped on the bearing plate 7.

[0040] When the drive end of the hydraulic cylinder extends, the support plate 7 and the battery cells can be inserted into the cleaning tank 1, thereby achieving the cleaning of the battery cells.

[0041] Reference Figure 2 and Figure 3 The bottom of the support plate 7 is provided with a clamping assembly 5 for clamping and positioning TOPCON battery cells. The clamping assembly 5 includes a support shaft 51, a top plate 52, and two side plates 53. One end of the support shaft 51 is rotatably connected to the bottom of the support plate 7 via a bearing, and the end of the support shaft 51 away from the support plate 7 is fixedly connected to the top plate 52. The two side plates 53 are respectively vertically fixedly connected to both ends of the top plate 52, and two clamping spaces for accommodating battery cells are formed between the two side plates 53.

[0042] Reference Figure 3 A movable positioning plate 54 is provided within the clamping space, and a fastener assembly 55 is provided on a side plate 53 for driving the positioning plate 54 to move and then locking it. In this embodiment, the fastener assembly 55 includes a threaded rod 551 and a handwheel 552. The threaded rod 551 is threadedly connected to a side plate 53, and one end of the threaded rod 551 inserted into the clamping space is rotatably connected to the positioning plate 54 through a bearing. The other end of the threaded rod 551 protrudes from the positioning plate 54 and is fixedly connected to the handwheel 552.

[0043] Rotating the handwheel 552 drives the threaded rod 551 to rotate. Since the threaded rod 551 is threadedly engaged with the side plate 53, and the positioning plate 54 is only rotatably connected to the end of the threaded rod 551 but does not rotate with it, the rotational motion of the threaded rod 551 is converted into the linear forward and backward motion of the positioning plate 54. The threaded drive has a self-locking characteristic, which can reliably lock at any position, ensuring that the clamping force will not loosen during the cleaning process. At the same time, the handwheel 552 is easy and precise to operate, and can easily control the tightness of the clamping, ensuring a firm clamping while avoiding crushing the battery cells due to excessive clamping force, thus achieving "non-destructive clamping".

[0044] In other embodiments, the fastener assembly 55 includes a pull rod, an elastic element, and an adjusting handle. The pull rod passes through a side plate 53, and one end of the pull rod located in the clamping space is fixedly connected to the positioning plate 54. The elastic element is a spring sleeved on the pull rod, with one end of the spring abutting against the side plate 53 and the other end of the spring abutting against the positioning plate 54. The other end of the pull rod is fixedly connected to the adjusting handle.

[0045] Hold the adjustment handle and pull the lever away from the side plate 53. The elastic element is compressed, and the battery cell is placed into the clamping space. Release the adjustment handle, and the elastic force of the elastic element drives the positioning plate 54 to move toward the battery cell, thereby clamping the battery cell.

[0046] Reference Figure 3 and Figure 4A rotary drive mechanism 6 is provided on the support plate 7 to drive the clamping assembly 5 to rotate below the support plate 7. The rotary drive mechanism 6 includes a gear 61 sleeved and locked on the support shaft 51 and a drive assembly 62 that drives the gear 61 to rotate. Two parallel fixing rods 71 ​​are fixedly connected to the side wall of the support plate 7. The ends of the two fixing rods 71 ​​are connected to the same fixing frame 623. A movable frame 624 is slidably arranged inside the fixing frame 623.

[0047] Reference Figure 3 and Figure 5 The drive assembly 62 includes a drive motor 621 and a rack 622 meshing with a gear 61. A connecting arm 628 is provided in the middle of the fixed frame 623, and the drive motor 621 is fixedly connected to the connecting arm 628. A fixed arm 627 is fixedly connected to the movable frame 624, and the end of the fixed arm 627 is connected to the rack 622. The inner top and bottom walls of the fixed frame 623 are provided with sliding grooves 625, which are dovetail grooves. The top and bottom of the movable frame 624 are fixedly connected with sliders 626 that slide in the corresponding sliding grooves 625. The sliders 626 are dovetail blocks. The drive motor 621 drives the movable frame 624 to reciprocate within the fixed frame 623 through an eccentric transmission structure 63.

[0048] Reference Figure 1 and Figure 5 The eccentric transmission structure 63 includes a rotating plate 631 and a push shaft 632. One end of the rotating plate 631 is fixedly connected to the output shaft of the drive motor 621, and the push shaft 632 is fixedly connected to the side wall of the other end of the rotating plate 631. The end of the push shaft 632 away from the rotating plate 631 is inserted into the inner cavity of the moving frame 624 and can slide along the inner cavity arm of the moving frame 624.

[0049] The drive motor 621 drives the rotating plate 631 to perform a circular motion, and the push shaft 632 fixed to its end also performs a circular motion. When the push shaft 632 is embedded in the inner cavity of the moving frame 624, its circular motion is constrained by the inner wall of the moving frame 624 and decomposed into a horizontal component force, thereby pushing the moving frame 624 to perform a horizontal reciprocating linear motion. The fixed frame 623 ensures that the motion trajectory of the moving frame 624 and the rack 622 is accurate, stable, and wobble-free, thereby ensuring the smoothness and reliability of the rotation of the gear 61.

[0050] The moving frame 624 drives the rack 622 in a linear reciprocating motion. The rack 622 then drives the meshing gear 61 to rotate alternately in both directions. The gear 61 ultimately transmits this reciprocating rotational motion to the clamping assembly 5 through the support shaft 51. This converts the unidirectional continuous rotation of the motor into the periodic forward and reverse rotation (reciprocating oscillation) of the clamping assembly 5. This motion mode creates turbulence on the surface of the battery cells, with the rinsing direction constantly changing. Compared to unidirectional rotation, it can more effectively remove contaminants, completely eliminate cleaning dead zones, and achieve a more uniform and thorough cleaning effect.

[0051] The implementation principle of the TOPCON battery acid and alkali cleaning device according to an embodiment of this application is as follows: The operator first places the TOPCON battery cell into the clamping space between the two side plates 53. By rotating the handwheel 552 to drive the threaded rod 551, the movable positioning plate 54 can be moved smoothly, thereby stably clamping the battery cell. This threaded self-locking design effectively prevents loosening during the cleaning process, while precise force control avoids the risk of silicon wafer breakage due to excessive stress, achieving safe and reliable non-destructive clamping.

[0052] After clamping is complete, the lifting mechanism 4 is activated, pushing the support plate 7 and the entire clamping assembly below it to descend smoothly, allowing the battery cells to be fully immersed in the chemical solution in the cleaning tank 1. Subsequently, the drive motor 621 is activated, driving the rotating plate 631 and the push shaft 632 to perform circular motion. The movement of the push shaft 632 within the cavity of the moving frame 624 is converted into a horizontal thrust on the moving frame 624, forcing the moving frame 624, carrying the rack 622, to perform reciprocating linear motion under the precise guidance of the fixed frame 623. The reciprocating motion of the rack 622 drives the gear 61 to rotate alternately in both directions, and finally, this reciprocating oscillation is transmitted to the clamping assembly 5 and the fixed battery cells through the support shaft 51.

[0053] The periodic forward and reverse oscillation of the solar cells in the cleaning solution violently disturbs the surrounding liquid flow, generating a strong turbulent scouring effect. This dynamic cleaning mode completely breaks through the flow field dead zones present in traditional static immersion or unidirectional rinsing, achieving all-round, highly uniform cleaning of the surface and edges of the solar cells, significantly improving the contaminant removal rate and cleaning efficiency. The entire process integrates stable clamping, lifting immersion, and dynamic swirling washing, with a high degree of automation and stable and reliable operation. While ensuring excellent cleaning results, it also greatly guarantees process consistency and product yield.

[0054] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A TOPCON battery acid and alkali cleaning device, comprising a cleaning tank (1), characterized in that, Also includes A support plate (7) is disposed above the cleaning tank (1); The clamping assembly (5) is rotatably disposed below the support plate (7), and the clamping assembly (5) is used to clamp and position the TOPCON battery cell; A lifting mechanism (4) is located above the cleaning tank (1), and the support plate (7) is mounted on the lifting mechanism (4). The lifting mechanism (4) is used to drive the support plate (7) and the clamping assembly (5) to move vertically. A rotary drive mechanism (6) is mounted on the support plate (7) and is used to drive the clamping assembly (5) to rotate below the support plate (7).

2. The TOPCON battery acid and alkali cleaning device according to claim 1, characterized in that, The clamping assembly (5) includes a support shaft (51), a top plate (52), and two side plates (53); The support shaft (51) is rotatably connected to the underside of the bearing plate (7); The top plate (52) is fixedly connected to the bottom end of the support shaft (51); The two side plates (53) are vertically fixed to both ends of the top plate (52) to form a clamping space for accommodating TOPCON battery cells; The clamping space is provided with a movable positioning plate (54), and the side plate (53) is provided with a fastener group (55) for driving the positioning plate (54) to move and lock it.

3. The TOPCON battery acid and alkali cleaning device according to claim 2, characterized in that, The fastener assembly (55) includes a threaded rod (551) and a handwheel (552). The threaded rod (551) is threadedly connected to a side plate (53). One end of the threaded rod (551) is fixedly connected to the handwheel (552), and the other end of the threaded rod (551) is rotatably connected to a positioning plate (54).

4. The TOPCON battery acid and alkali cleaning device according to claim 2, characterized in that, The rotary drive mechanism (6) includes a gear (61) sleeved and locked on the support shaft (51), and a drive assembly (62) for driving the gear (61) to rotate. The drive assembly (62) includes a drive motor (621) and a rack (622) meshing with a gear (61). The drive motor (621) is used to drive the rack (622) to reciprocate linearly along the length of the support plate (7).

5. The TOPCON battery acid and alkali cleaning device according to claim 4, characterized in that, A fixed frame (623) is connected to the side wall of the bearing plate (7), and a movable frame (624) is slidably arranged inside the fixed frame (623). The movable frame (624) is fixedly connected to the rack (622) through a connecting arm (628). The drive motor (621) drives the moving frame (624) to slide back and forth within the fixed frame (623) through the eccentric transmission structure (63).

6. The TOPCON battery acid and alkali cleaning device according to claim 5, characterized in that, The eccentric transmission structure (63) includes a rotating plate (631) fixed on the output shaft of the drive motor (621) and a push shaft (632) fixed on the end of the rotating plate (631). The push shaft (632) extends into the inner cavity of the movable frame (624) and can slide along its inner cavity wall.

7. The TOPCON battery acid and alkali cleaning device according to claim 5, characterized in that, The inner top and bottom walls of the fixed frame (623) are provided with sliding grooves (625), and the top and bottom of the movable frame (624) are fixedly connected with sliders (626) that cooperate with the sliding grooves (625).

8. The TOPCON battery acid and alkali cleaning device according to claim 1, characterized in that, The lifting mechanism (4) includes a hydraulic cylinder. An L-shaped plate (3) is fixedly connected to the side wall of the cleaning box (1). The hydraulic cylinder is fixed at the end of the L-shaped plate (3) away from the cleaning box (1). The output end of the hydraulic cylinder is fixedly connected to the bearing plate (7).

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