A fully automatic powder cleaning machine

Abstract

This utility model relates to a fully automatic powder cleaning machine, belonging to the field of lithium-ion battery manufacturing technology. The powder cleaning mechanism includes a frame and an unwinding mechanism, a powder cleaning device, a winding mechanism, and guide rollers mounted on it. The powder cleaning device includes a mounting plate, two sets of powder cleaning mechanisms, and two sets of conveying mechanisms. A floating mechanism is provided on the output side of the conveying mechanism, and an electrode clamping mechanism is provided below the powder cleaning mechanism. Through the cooperation of these mechanisms, the electrode is unwound by the unwinding mechanism, and after the front and back coatings are removed sequentially, it is wound up by the winding mechanism. The powder cleaning mechanism uses a rotary motor to drive soft wheels for powder cleaning, and a CNC module achieves precise movement. The conveying mechanism and the floating mechanism ensure stable electrode transport. This utility model has significant advantages such as high-efficiency powder cleaning, precise control, electrode protection, energy saving and environmental protection, and convenient operation, meeting the high-quality requirements of lithium battery manufacturing.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery manufacturing technology, specifically a fully automatic powder cleaning machine. Background Technology

[0002] In the lithium battery manufacturing process, the quality of the tab welding process plays a crucial role in battery performance and safety. Before welding the tabs, the coating on the areas to be welded must be precisely removed. Currently, four main methods are used in industry: laser cleaning, mechanical scraping, solvent removal, and foam adhesive removal. While laser cleaning can remove coatings, the high temperatures generated by the laser can easily burn and transmit light through the foil, affecting material integrity, reducing cleaning efficiency, and causing dust contamination of the product. Furthermore, the foil is prone to oxidation at high temperatures, potentially leading to poor soldering and desoldering of the electrode tabs. Mechanical scraping, due to direct contact between mechanical parts and the electrode, can easily scratch the electrode surface and makes it difficult to ensure the foil cleanliness meets welding process requirements. Solvent removal uses large amounts of chemical solvents, causing significant environmental pollution, and the time-consuming solvent evaporation and drying processes significantly reduce production efficiency. Foaming removal methods cause the slurry to migrate around the adhesive paper during operation, increasing the coating density and affecting the battery's electrical performance and thickness consistency. Moreover, the high-temperature baking process of the foaming adhesive is extremely energy-intensive, increasing production costs. Therefore, existing coating technologies all have significant shortcomings, urgently requiring a new technological solution to achieve efficient, environmentally friendly, and precise electrode tab coating removal to meet the high-quality requirements of lithium battery manufacturing. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a fully automatic powder cleaning machine that achieves efficient, environmentally friendly, and precise removal of electrode coatings.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a fully automatic powder cleaning machine, including a frame and an unwinding mechanism, a powder cleaning device, a winding mechanism, and several guide rollers mounted on the frame; the guide rollers are arranged in different directions to assist in the conveying of electrode sheets, realizing the powder cleaning of the front and back sides of the electrode sheets; the unwinding mechanism is used to release the electrode sheets, and the winding mechanism is used to collect the powder-cleaned electrode sheets; the powder cleaning device includes a mounting plate vertically fixed on the frame, and two sets of powder cleaning mechanisms and two sets of conveying mechanisms, both mounted on the mounting plate; each of the two sets of conveying mechanisms has an adjustment electrode sheet conveying guide on its output side. The process includes a floating tension mechanism; each group of powder cleaning mechanisms has an electrode clamping mechanism below it; the electrode positions in the two groups of conveying mechanisms are at the same height and higher than the electrode positions in the first group of powder cleaning mechanisms, and the electrode positions in the first group of powder cleaning mechanisms are higher than the electrode positions in the second group of powder cleaning mechanisms; the electrode output by the unwinding mechanism passes through the first group of powder cleaning mechanisms to remove the front coating, and is then conveyed by the first group of conveying mechanisms to the second group of powder cleaning mechanisms, where the second group of powder cleaning mechanisms removes the coating on the back of the electrode corresponding to the front coating removal position, and finally is conveyed by the second group of conveying mechanisms to the winding mechanism for winding.

[0005] Preferably, both sets of the powder cleaning mechanism include a first mounting base and a rotary motor, a flexible wheel, and a clamping cylinder, all mounted on the first mounting base. The bottom of the first mounting base, which extends horizontally through the mounting plate and faces away from the flexible wheel, is fixedly connected to the slider of the CNC module. The CNC module is fixed to the machine frame by a mounting bracket. The output shaft of the rotary motor is provided with a drive wheel, which is connected to a driven wheel on the same side via a belt. The driven wheel is mounted on a driven shaft, which is fixed to the first mounting base by a fixing seat. The flexible wheel is fixedly assembled to the end of the driven shaft facing away from the driven wheel and located inside the first mounting base. The bottom of the first mounting base is provided with a powder cleaning groove along the coating removal direction. The width is not less than the thickness of the flexible wheel; the electrode clamping mechanism includes a clamping cylinder, an L-shaped lower clamping plate, a first slide rail, and a first slider; the cylinder mounting seat of the clamping cylinder is fixed to the end of the CNC module near the flexible wheel, the first slide rail is vertically arranged on the cylinder mounting seat, the vertical section of the L-shaped lower clamping plate is fixedly connected to the first slider, and its horizontal section is located directly below the powder cleaning tank; the piston rod of the clamping cylinder is connected to the bottom of the vertical section of the L-shaped lower clamping plate, driving the L-shaped lower clamping plate to slide up and down; the piston rod of the pressing cylinder is movably abutted against the driven shaft between the first mounting seat and the flexible wheel, the electrode is located between the bottom of the flexible wheel and the L-shaped lower clamping plate, and the pressing cylinder cooperates with the electrode clamping mechanism to achieve stable clamping of the electrode.

[0006] Preferably, both sets of conveying mechanisms include a conveying motor, a pressure cylinder, and upper and lower rollers arranged correspondingly. The output shaft of the conveying motor passes through the mounting plate and is rotatably connected to the lower base. The lower base is fixed to the mounting plate, and the lower roller is mounted on the output shaft of the conveying motor. The pressure cylinder is fixed to the mounting plate through a second mounting seat, and the piston rod of the pressure cylinder is fixedly connected to the top of the upper base. The upper base is used to assemble the upper roller.

[0007] Preferably, both sets of the floating mechanisms include a floating cylinder, a floating rod, and a floating block; the floating rod is fixed to the mounting plate in the vertical direction, the floating block is slidably connected to the floating rod, and at least two guide rollers are provided on the floating block along the horizontal conveying direction of the electrode sheet; the floating cylinder is fixed to the mounting plate, its piston rod is connected to the bottom of the floating block, and the floating cylinder is electrically connected to the pressure regulating valve.

[0008] Preferably, each of the powder cleaning mechanisms is equipped with an optical fiber sensor for sensing the location of electrode coating removal.

[0009] Preferably, the fully automatic powder cleaning machine also includes a controller and a display mounted on the frame, the controller being used to implement functional control of all electrically connected structures.

[0010] Preferably, the CNC module is a double linear guide screw module.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model uses two sets of powder cleaning mechanisms and conveying mechanisms to achieve continuous powder cleaning on both sides of the electrode sheet, which greatly improves the powder cleaning efficiency and reduces production time compared with the traditional method. At the same time, the horizontal movement of the powder cleaning mechanism is controlled by the CNC module, and the fiber optic sensor senses the coating removal position, which can accurately locate and remove the coating in the electrode tab area, ensuring the powder cleaning accuracy.

[0013] 2. The soft wheel cleaning method of this utility model replaces the traditional laser and mechanical scraping methods that are prone to damaging the electrode sheet, avoiding scratches on the electrode sheet surface. At the same time, the cooperation between the clamping mechanism and the pressing cylinder ensures the stability of the electrode sheet during the cleaning process and prevents displacement.

[0014] 3. The floating mechanism in this utility model adjusts the distance between the upper and lower guide rollers by moving them up and down, thereby adjusting the tension during the electrode conveying process and maintaining a constant tension. Then, through the upper and lower rollers of the conveying mechanism in conjunction with the pressure cylinder, the electrode can be stably clamped and conveyed, ensuring that the electrode is flat and wrinkle-free during the conveying process, thus improving the powder cleaning quality and consistency.

[0015] 4. This utility model avoids the high energy consumption and dust pollution of laser cleaning, as well as the chemical pollution of solvent removal. At the same time, it reduces the energy consumption of high-temperature baking in foam removal, which is more in line with the concept of green production.

[0016] 5. This utility model is automated. The controller integrates the control of all electrically connected structures. Operators can set equipment operating parameters and monitor status through the display. The operation is simple and convenient, reducing the difficulty and labor intensity of manual operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 yes Figure 2 The main view;

[0021] Figure 5 This is a three-dimensional structural diagram of the present invention from another angle;

[0022] Figure 6 yes Figure 5 Enlarged diagram of point B in the middle. Detailed Implementation

[0023] The following will combine Figure 1-6 The present invention will be described in detail below. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0024] A fully automatic electrode cleaning machine includes a frame 1 and an unwinding mechanism 2, a cleaning device, a winding mechanism 3, and several guide rollers 4 mounted on the frame. The guide rollers are arranged in different directions to assist in electrode conveying, achieving electrode cleaning on both sides. The unwinding mechanism is used to release the electrode, and the winding mechanism is used to collect the cleaned electrode. The cleaning device includes a mounting plate 5 vertically fixed on the frame, and two sets of cleaning mechanisms 111 and two sets of conveying mechanisms 222, each mounted on the mounting plate. A floating mechanism is provided on the output side of each of the two conveying mechanisms to adjust the tension during electrode conveying. 333; Each set of powder cleaning mechanisms is equipped with an electrode clamping mechanism 444 below it; The electrode positions in the two sets of conveying mechanisms are at the same height and higher than the electrode positions in the first set of powder cleaning mechanisms, and the electrode positions in the first set of powder cleaning mechanisms are higher than the electrode positions in the second set of powder cleaning mechanisms; The electrode output by the unwinding mechanism passes through the first set of powder cleaning mechanisms to remove the front coating, and is then conveyed by the first set of conveying mechanisms to the second set of powder cleaning mechanisms. The second set of powder cleaning mechanisms removes the coating on the back of the electrode corresponding to the front coating removal position, and finally is conveyed by the second set of conveying mechanisms to the winding mechanism for winding. The automatic powder cleaning machine also includes a controller and a display 32 mounted on the frame. The controller is used to control the functions of all electrically connected structures. Operators can set equipment operating parameters and monitor status through the display. Each of the powder cleaning mechanisms is equipped with an optical fiber sensor. When the optical fiber sensor at the first set of powder cleaning mechanisms detects the position of the coating to be removed on the front of the electrode, it feeds back a signal to the controller, thereby controlling the first set of powder cleaning mechanisms to perform front-side powder cleaning. When the optical fiber sensor at the second set of powder cleaning mechanisms detects the position of the coating to be removed on the front, it feeds back a signal to the controller, thereby controlling the second set of powder cleaning mechanisms to perform reverse-side powder cleaning.

[0025] Specifically, both sets of powder cleaning mechanisms include a first mounting base 6 and a rotary motor 7, a flexible wheel 8, and a clamping cylinder 9, all mounted on the first mounting base. The bottom of the first mounting base, which extends horizontally through the mounting plate and is located away from the flexible wheel, is fixedly connected to the slider 11 of the CNC module 10. The CNC module is fixed to the machine frame via a mounting bracket 12. In this design, the CNC module is a double linear guide screw module, such as SGXII. The clamping cylinder can be a needle cylinder, such as CDJP2B. The output shaft of the rotary motor is equipped with a drive wheel, which is connected to a driven wheel on the same side via a belt. The driven wheel is mounted on a driven shaft 13, which is fixed to the first mounting base via a fixing seat 14. The flexible wheel is fixedly mounted on the end of the driven shaft away from the driven wheel and located inside the first mounting base. The bottom of the first mounting base extends along the coating cleaning line. The electrode clamping mechanism includes a cleaning groove 15 with a groove opening width not less than the thickness of the flexible wheel. The bottom of the flexible wheel passes through the cleaning groove and abuts against the electrode sheet. The electrode clamping mechanism includes a clamping cylinder 16, an L-shaped lower clamping plate 17, a first slide rail 18, and a first slider 19. The cylinder mounting base 20 of the clamping cylinder is fixed to the end of the CNC module near the flexible wheel. The first slide rail is vertically mounted on the cylinder mounting base. The vertical section of the L-shaped lower clamping plate is fixedly connected to the first slider, and its horizontal section is located directly below the cleaning groove. The piston rod of the clamping cylinder is connected to the bottom of the vertical section of the L-shaped lower clamping plate, driving the L-shaped lower clamping plate to slide up and down. The piston rod of the pressing cylinder is in movable contact with the driven shaft between the first mounting base and the flexible wheel. The electrode sheet is located between the bottom of the flexible wheel and the L-shaped lower clamping plate. The pressing cylinder cooperates with the electrode clamping mechanism to achieve stable clamping of the electrode sheet.

[0026] Both sets of conveying mechanisms include a conveying motor 21, a pressure cylinder 22, and upper and lower rollers 23 and 24 respectively. The output shaft of the conveying motor passes through the mounting plate and is rotatably connected to the lower base 25. The lower base is fixed to the mounting plate, and the lower roller is mounted on the output shaft of the conveying motor. The pressure cylinder is fixed to the mounting plate through the second mounting seat 26. The piston rod of the pressure cylinder is fixedly connected to the top of the upper base 27. The upper base is used to mount the upper roller. The pressure cylinder drives the upper base to move up and down, thereby adjusting the gap between the upper and lower rollers through which the electrode sheets pass, ensuring stable conveying of the electrode sheets.

[0027] Both sets of floating mechanisms include a floating cylinder 28, a floating rod 29, and a floating block 30. The floating rod is fixed to the mounting plate in the vertical direction, and the floating block is slidably connected to the floating rod, with at least two guide rollers on the floating block along the horizontal conveying direction of the electrode sheet. The floating cylinder is fixed to the mounting plate, its piston rod is connected to the bottom of the floating block, and the floating cylinder is electrically connected to the pressure regulating valve 31. This floating mechanism can adjust the distance between the upper and lower guide rollers to regulate the tension during the electrode sheet conveying process and maintain a constant tension. Specifically, the first set of floating mechanisms enables the synchronous movement of the conveying motors of the two conveying mechanisms, and the second set of floating mechanisms enables the synchronous movement of the winding motor of the winding mechanism and the conveying motor of the second conveying mechanism, ultimately ensuring the stability of the electrode sheet during the conveying process.

[0028] During implementation, when the fully automatic cleaning machine starts working, the unwinding mechanism releases the rolled electrode sheets. Simultaneously, two sets of conveyor motors operate, and the electrode sheets, guided by several guide rollers, first enter the first cleaning mechanism. At this time, the clamping cylinder of the electrode clamping mechanism activates, driving the L-shaped lower clamping plate upwards to stably clamp the electrode sheet between the bottom of the flexible wheel and the L-shaped lower clamping plate. Simultaneously, the piston rod of the pressing cylinder extends and abuts against the driven shaft, ensuring appropriate pressure between the flexible wheel and the electrode sheet. The rotary motor starts, driving the driven wheel and driven shaft to rotate via the drive wheel and belt, causing the flexible wheel to rotate and remove the coating on the front of the electrode sheet. The CNC module can drive the first mounting base to move horizontally according to the set program, achieving precise cleaning of the flexible wheel to the required length on the front of the electrode sheet.

[0029] After the front-side powder cleaning is completed, the first set of conveying mechanisms drives the lower layer rollers to rotate, while the pressure cylinder pushes the upper layer rollers down to clamp the electrode sheet and convey it to the second set of powder cleaning mechanisms. During the conveying process, the floating cylinder of the floating mechanism drives the floating block to move up and down on the floating rod according to the control signal of the pressure regulating valve, thereby adjusting the distance between the guide roller on the floating block and the upper guide roller. The adjustment of the upper and lower guide roller distance of the first set of floating mechanisms enables the conveying motors of the two sets of conveying mechanisms to move synchronously. The adjustment of the upper and lower guide roller distance of the second set of floating mechanisms enables the winding motor of the winding mechanism and the conveying motor of the second set of conveying mechanisms to move synchronously, thereby maintaining a constant tension during the electrode sheet conveying process and ensuring smooth electrode sheet transport.

[0030] After the electrode sheet reaches the second set of powder cleaning mechanisms, it is also fixed by the electrode sheet clamping mechanism and the pressing cylinder of this set. The soft rollers of the second set of powder cleaning mechanisms remove the coating from the reverse side of the electrode sheet at the corresponding position of the front side. Finally, the second set of conveying mechanisms conveys the double-sided powder-cleaned electrode sheet to the winding mechanism for winding. Throughout the powder cleaning process, the fiber optic sensor at the powder cleaning mechanism senses the coating removal position of the electrode sheet in real time and feeds the signal back to the controller. The controller precisely controls each mechanism according to the preset program. At the same time, the operator can monitor the equipment's operating status and powder cleaning parameters in real time through the display on the rack.

[0031] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fully automatic powder cleaning machine, characterized in that: The device includes a frame (1) and an unwinding mechanism (2), a cleaning device, a winding mechanism (3), and several guide rollers (4) mounted on the frame. The guide rollers are arranged in different directions to assist in the conveying of the electrode sheets, thereby achieving cleaning of the front and back sides of the electrode sheets. The unwinding mechanism is used to release the electrode sheets, and the winding mechanism is used to collect the electrode sheets that have been cleaned. The cleaning device includes a mounting plate (5) vertically fixed on the frame, and two sets of cleaning mechanisms (111) and two sets of conveying mechanisms (222) mounted on the mounting plate. The output side of each of the two sets of conveying mechanisms is equipped with a floating mechanism to adjust the tension during the conveying of the electrode sheets. Mechanism (333); each group of powder cleaning mechanisms is provided with an electrode clamping mechanism (444) below it; the electrode positions in the two groups of conveying mechanisms are at the same height and higher than the electrode positions in the first group of powder cleaning mechanisms, and the electrode positions in the first group of powder cleaning mechanisms are higher than the electrode positions in the second group of powder cleaning mechanisms; the electrode output by the unwinding mechanism passes through the first group of powder cleaning mechanisms to remove the front coating, and is then conveyed by the first group of conveying mechanisms to the second group of powder cleaning mechanisms, where the second group of powder cleaning mechanisms removes the coating on the back of the electrode corresponding to the front coating removal position, and finally is conveyed by the second group of conveying mechanisms to the winding mechanism for winding.

2. The fully automatic powder cleaning machine according to claim 1, characterized in that: Both sets of powder cleaning mechanisms include a first mounting base (6) and a rotary motor (7), a flexible wheel (8), and a clamping cylinder (9) all mounted on the first mounting base. The first mounting base is horizontally mounted through the mounting plate, and the bottom of the end opposite to the flexible wheel is fixedly connected to the slider (11) of the CNC module (10). The CNC module is fixed to the machine frame by a mounting bracket (12). The output shaft of the rotary motor is provided with a drive wheel, which is connected to the driven wheel on the same side by a belt. The driven wheel is mounted on a driven shaft (13), which is fixed to the first mounting base by a fixing seat (14). The flexible wheel is fixedly mounted on the end of the driven shaft opposite to the driven wheel and located inside the first mounting base. The bottom of the first mounting base is provided with a powder cleaning groove (15) along the coating removal direction. The width of the powder cleaning tank opening is not less than the thickness of the flexible wheel; the electrode clamping mechanism includes a clamping cylinder (16), an L-shaped lower clamping plate (17), a first slide rail (18), and a first slider (19); the cylinder mounting seat (20) of the clamping cylinder is fixed to the end of the CNC module near the flexible wheel, the first slide rail is set on the cylinder mounting seat in the vertical direction, the vertical section of the L-shaped lower clamping plate is fixedly connected to the first slider, and its horizontal section is located directly below the powder cleaning tank; the piston rod of the clamping cylinder is connected to the bottom of the vertical section of the L-shaped lower clamping plate, driving the L-shaped lower clamping plate to slide up and down; the piston rod of the pressing cylinder is in contact with the driven shaft between the first mounting seat and the flexible wheel, the electrode is located between the bottom of the flexible wheel and the L-shaped lower clamping plate, and the pressing cylinder cooperates with the electrode clamping mechanism to achieve stable clamping of the electrode.

3. The fully automatic powder cleaning machine according to claim 1, characterized in that: Both sets of conveying mechanisms include a conveying motor (21), a pressure cylinder (22), and upper rollers (23) and lower rollers (24) arranged correspondingly on the top and bottom. The output shaft of the conveying motor passes through the mounting plate and is rotatably connected to the lower base (25). The lower base is fixed to the mounting plate, and the lower rollers are mounted on the output shaft of the conveying motor. The pressure cylinder is fixed to the mounting plate through the second mounting seat (26), and the piston rod of the pressure cylinder is fixedly connected to the top of the upper base (27). The upper base is used to assemble the upper rollers.

4. The fully automatic powder cleaning machine according to claim 1, characterized in that: Both sets of floating mechanisms include a floating cylinder (28), a floating rod (29), and a floating block (30); the floating rod is fixed to the mounting plate in the vertical direction, the floating block is slidably connected to the floating rod, and at least two guide rollers are provided on the floating block in the horizontal conveying direction of the electrode sheet; the floating cylinder is fixed to the mounting plate, its piston rod is connected to the bottom of the floating block, and the floating cylinder is electrically connected to the pressure regulating valve (31).

5. The fully automatic powder cleaning machine according to claim 1, characterized in that: Each of the aforementioned powder cleaning mechanisms is equipped with an optical fiber sensor for sensing the location where the electrode coating is being removed.

6. The fully automatic powder cleaning machine according to claim 1, characterized in that: The fully automatic powder cleaning machine also includes a controller and a display (32) mounted on the frame. The controller is used to implement the functional control of all electrically connected structures.

7. The fully automatic powder cleaning machine according to claim 2, characterized in that: The CNC module is a double linear guide screw module.

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