Pole piece coating scraping method

Abstract

The application discloses a kind of pole piece coating scraping methods, it includes the following steps: pole piece is installed to pole piece driving device, the blade of scraper is horizontally opposite the tangent between the arc side of the pole piece and vertical plane;The lifting driving mechanism is driven to make the blade of the scraper rise, and the blade of the scraper is higher than the tangent;The transverse driving mechanism is driven to make the blade of the scraper move horizontally, and the blade of the scraper moves above the pole piece, and the transverse distance between the blade of the scraper and the tangent is equal to the minimum thickness of coating scraping;The lifting driving mechanism is driven to make the blade of the scraper descend to the horizontal position of step S1, so that the blade of the scraper is cut into the coating of the pole piece;The pole piece driving device is driven to move relative to the scraper, so that the scraper scrapes coating.The present application has the advantages of stable, accurate, prolonging the service life of the scraper.

Description

Technical Field

[0001] This invention relates to the field of lithium battery electrode testing technology, and more particularly to a method for scraping electrode coatings. Background Technology

[0002] To improve the performance and safety of electrode sheets, their surface coating must be inspected in the thickness direction after production. Current methods for inspecting electrode coatings typically involve using a feed mechanism to drive a scraper horizontally, with the electrode sheet supported on a roller. The scraper's blade is then vertically inserted into the coating, cutting to a depth equal to the thickness of the coating being scraped off. Finally, an electrode drive mechanism moves the electrode sheet across the roller surface, causing it to move relative to the scraper, which then scrapes off the coating.

[0003] However, existing electrode coating scraping methods all involve horizontal blade entry. This method presents the following problems: when the blade inserts vertically into the coating, the pressure applied to both the coating and the roller is met with a reaction force from the roller. Furthermore, the coating itself has a high hardness, resulting in significant reaction force on the blade. After a period of use, the blade is prone to deformation or chipping, which in turn affects the smoothness and accuracy of coating scraping. In addition, the moment the blade enters the coating, the instantaneous thrust as the electrode moves along the roller surface is extremely large. This upward thrust can easily cause the blade to retract, further reducing the stability and accuracy of coating scraping. Therefore, it is necessary to improve this coating scraping method. Summary of the Invention

[0004] The purpose of this invention is to provide a method for scraping electrode coatings, which features smooth and precise coating scraping and extends the service life of the scraper.

[0005] To achieve the above objectives, the present invention provides a method for scraping electrode coatings, comprising the following steps: S1: Install the electrode sheet onto the electrode sheet driving device, so that the electrode sheet is attached to the roller surface of the roller shaft of the electrode sheet driving device, and make the blade of the scraper horizontally aligned with the tangent between the arc-shaped side surface of the electrode sheet and the vertical plane. S2: The scraper is driven to rise using a lifting drive mechanism, so that the blade of the scraper is higher than the tangent line; S3: The scraper is driven to move laterally horizontally using a lateral drive mechanism, so that the blade of the scraper moves above the electrode sheet, and the lateral distance between the blade of the scraper and the tangent is equal to the minimum thickness of the coating scraped off. S4: The lifting drive mechanism is used to drive the scraper down to the horizontal position of step S1, so that the blade of the scraper cuts into the coating of the electrode sheet; S5: The electrode is driven by the electrode driving device to move relative to the scraper, so that the scraper scrapes off the coating.

[0006] Compared with existing technologies, this invention utilizes a lifting drive mechanism to drive the scraper upward, then a lateral drive mechanism to drive the scraper horizontally, bringing it closer to the electrode sheet. The lifting drive mechanism then drives the scraper downward, allowing it to cut into the curved side of the electrode sheet from above. This avoids the forces exerted on the scraper's edge by the roller and coating from the front, significantly reducing the risk of blade deformation or chipping and greatly extending the scraper's service life. Furthermore, maintaining the integrity of the scraper's edge ensures the stability and accuracy of coating scraping. In addition, when the scraper cuts into the curved side of the electrode sheet from above, it initially scrapes away part of the coating, softening it. This reduces the impact on the scraper as the electrode sheet moves along the roller surface, minimizing scraper retreat and further ensuring the stability and accuracy of coating scraping.

[0007] Preferably, the method further includes step S6: repeating steps S2 to S5 to scrape the coating from light to dark at the same location on the electrode. This allows for scraping coatings of different thicknesses at the same location on the electrode, facilitating rapid analysis of the material composition and distribution of the coating in the thickness direction and improving the convenience of testing.

[0008] Preferably, the method further includes the following steps: S6: resetting the scraper to the position of step S1; using the longitudinal drive mechanism to drive the scraper to move longitudinally and horizontally by at least the distance of the coating scraping width; S7: repeating steps S2 to S5 to scrape the coating at another position on the electrode. This allows the coating to be scraped at different positions on the electrode in the width direction, thereby facilitating rapid analysis of the material composition and distribution of the coating and improving the convenience of testing.

[0009] Preferably, the method further includes step S8: repeating steps S6 to S7 to scrape the coating at different longitudinal positions of the electrode.

[0010] Preferably, the scraper includes a blade tip and a blade body, with the blade tip having a bent structure relative to the blade body. Since the electrode initially moves upwards along the roller surface and exerts a significant impact force on the blade edge, bending the blade tip relative to the blade body increases the blade edge's strength and impact resistance, thereby further reducing damage to the blade edge and extending the scraper's service life.

[0011] Preferably, the electrode thickness is 100um-300um, the coating thickness is 60um-200um, and the depth of coating scraped by the scraper is 10um-60um each time.

[0012] Preferably, the blade edge is parallel to the tangent. This ensures uniform coating scraping and improves detection accuracy.

[0013] Preferably, the lifting drive mechanism includes a lifting servo motor, a first lead screw, and a lifting platform. The scraper is mounted on the lifting platform. The output end of the lifting servo motor is connected to one end of the first lead screw, and the other end of the first lead screw is threadedly connected to the lifting platform to drive the lifting platform to rise or fall. By using a servo motor and a lead screw as driving components, the servo motor can precisely control the output speed and angle, while the lead screw can precisely convert the output angle of the servo motor into linear movement, thereby greatly improving the accuracy of the drive and ensuring the precise vertical movement of the scraper.

[0014] Specifically, the transverse drive mechanism includes a transverse servo motor, a second lead screw, and a transverse slide. The lifting drive mechanism is mounted on the transverse slide. The output end of the transverse servo motor is connected to one end of the second lead screw, and the other end of the second lead screw is threadedly connected to the transverse slide to drive the transverse slide to move laterally. Similarly, the transverse servo motor and the second lead screw can greatly improve the accuracy of the drive and ensure the precision of the transverse feed.

[0015] Specifically, the longitudinal drive mechanism includes a longitudinal servo motor, a third lead screw, and a longitudinal slide. The longitudinal drive mechanism is mounted on the transverse slide, and the lifting drive mechanism is mounted on the longitudinal slide. The output end of the longitudinal servo motor is connected to one end of the third lead screw, and the other end of the third lead screw is threadedly connected to the longitudinal slide to drive the longitudinal slide to move longitudinally. Similarly, the longitudinal servo motor and the third lead screw can greatly improve the accuracy of the drive and ensure the precision of the longitudinal movement of the scraper. Attached Figure Description

[0016] Figure 1 This is a flowchart of the electrode coating scraping method according to Embodiment 1 of the present invention.

[0017] Figure 2 This is a structural diagram of the electrode coating scraping device used in the electrode coating scraping method of Embodiment 1 of the present invention.

[0018] Figure 3 This is a side view showing the alignment of the scraper and tangent in the electrode coating scraping method of Embodiment 1 of the present invention.

[0019] Figure 4 This is a side view of the electrode coating scraping method of Embodiment 1 of the present invention after the scraper has risen.

[0020] Figure 5This is a diagram showing the state of the scraper after it has made a lateral infeed in the electrode coating scraping method of Embodiment 1 of the present invention.

[0021] Figure 6 This is a diagram showing the state of the electrode coating scraping method according to Embodiment 1 of the present invention after the scraper cuts down.

[0022] Figure 7 This is a structural diagram of another scraper used in the electrode coating scraping method of Embodiment 1 of the present invention.

[0023] Figure 8 This is a structural diagram of the electrode driving device used in the electrode coating scraping method of Embodiment 1 of the present invention.

[0024] Figure 9 This is a structural diagram of the lifting drive mechanism, the lateral drive mechanism, and the longitudinal drive mechanism used in the electrode coating scraping method of Embodiment 1 of the present invention.

[0025] Figure 10 This is a flowchart of the electrode coating scraping method according to Embodiment 2 of the present invention.

[0026] Figure 11 This is a top view of the scraper and electrode sheet in the electrode coating scraping method of Embodiment 2 of the present invention.

[0027] Figure 12 This is a top view of the electrode coating scraping method of Embodiment 2 of the present invention after the scraper has moved longitudinally. Detailed Implementation

[0028] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] Please see Figures 1 to 8 The electrode coating scraping method of the present invention includes the following steps: S1: The electrode 200 is mounted onto the electrode driving device 1, such that the electrode 200 is attached to the roller surface of the roller shaft 2 of the electrode driving device 1, and the blade of the scraper 3 is horizontally aligned with the tangent 21 between the arcuate side surface of the electrode 200 and the vertical plane. The blade is parallel to the tangent 21. This ensures the uniformity of coating scraping and improves the accuracy of detection.

[0030] S2: The scraper 3 is driven to rise by the lifting drive mechanism 4, so that the blade of the scraper 3 is higher than the tangent 21.

[0031] S3: The lateral drive mechanism 5 drives the scraper 3 to move laterally horizontally, so that the blade of the scraper 3 moves above the electrode 200, and the lateral distance between the blade of the scraper 3 and the tangent 21 is equal to the minimum thickness of the coating scraped off.

[0032] S4: The lifting drive mechanism 4 is used to drive the scraper 3 to descend to the horizontal position of step S1, so that the blade of the scraper 3 cuts into the coating of the electrode 200.

[0033] S5: The electrode 200 is driven to move relative to the scraper 3 by the electrode driving device 1, so that the scraper 3 scrapes off the coating.

[0034] S6: Repeat steps S2 to S5 to scrape the coating from light to dark at the same location on the electrode 200. This allows for scraping coatings of different thicknesses at the same location on the electrode 200, which helps to quickly analyze the material composition and distribution of the coating in the thickness direction and improves the convenience of testing.

[0035] The depth of the coating layer scraped by the scraper 3 is 10um-60um each time. The thickness of the electrode 200 is 100um-300um, and the thickness of the coating layer is 60um-200um.

[0036] Please refer to the following: Figure 7 As shown, in this embodiment, the scraper 3 includes a blade tip 31 and a blade body 32. The blade tip 31 and the blade body 32 are integrally formed, and the extension direction of the blade tip 31 is the same as the lateral extension direction of the blade body 32, thus making the scraper 3 have a straight overall structure. In other embodiments, the blade tip 31' of the scraper 3' is bent relative to the blade body 32' towards the electrode 200, and the bending angle is an acute angle or a right angle, preferably a right angle. Since the electrode 200 initially moves upward along the roller surface and generates a large impact force on the blade edge, bending the blade tip 31' relative to the blade body 32' increases the strength of the blade edge and enhances its impact resistance, thereby further reducing damage to the blade edge and extending the service life of the scraper 3'.

[0037] Please see Figure 8The electrode driving device 1 includes an electrode driving motor 11, a transmission belt 12, two sliders 13, and four transmission wheels 14. The transmission wheels 14 are pivotally connected to the frame 15. The transmission belt 12 surrounds the four transmission wheels 14 and forms an upper driving belt 121 and a lower driving belt 122 with opposite directions of movement. The two sliders 13 are slidably disposed on the frame 15, one slider 13 is connected to the upper driving belt 121, and the other slider 13 is connected to the lower driving belt 122. One end of the electrode 200 is connected to one of the sliders 13, and the other end of the electrode 200 is connected to the other slider 13. The output end of the electrode driving motor 11 is connected to one of the transmission wheels 14 to drive the transmission belt 12 to move back and forth when rotating in the forward and reverse directions, thereby driving the electrode 200 to move back and forth, so that the electrode 200 moves back and forth on the roller surface of the roller shaft 2. In this embodiment, the electrode drive motor 11 is a servo motor or a stepper motor; the transmission wheel 14 is a toothed synchronous pulley, and the transmission belt 12 is a toothed synchronous belt. Of course, the transmission wheel 14 can also be a pulley, and the transmission belt 12 can be a belt, which can also drive the electrode 200 to move.

[0038] Please see again Figure 9 The lateral drive mechanism 5 includes a lateral servo motor 51, a second lead screw 52, ​​and a lateral slide 53. The longitudinal drive mechanism 6 is mounted on the lateral slide 53. The output end of the lateral servo motor 51 is connected to one end of the second lead screw 52, ​​and the other end of the second lead screw 52 is threadedly connected to the lateral slide 53 to drive the lateral slide 53 to move laterally. The longitudinal drive mechanism 6 includes a longitudinal servo motor 61, a third lead screw 62, and a longitudinal slide 63. The lifting drive mechanism 4 is mounted on the longitudinal slide 63. The output end of the longitudinal servo motor 61 is connected to one end of the third lead screw 62, and the other end of the third lead screw 62 is threadedly connected to the longitudinal slide 63 to drive the longitudinal slide 63 to move longitudinally. The lifting drive mechanism 4 includes a lifting servo motor 41, a first lead screw 42, and a lifting platform 43. The scraper 3 is mounted on the lifting platform 43. The output end of the lifting servo motor 41 is connected to one end of the first lead screw 42, and the other end of the first lead screw 42 is threadedly connected to the lifting platform 43 to drive the lifting platform 43 to rise or fall. By using the servo motor and lead screw as driving components, the servo motor can precisely control the output speed and angle, while the lead screw can precisely convert the output angle of the servo motor into linear movement, thereby greatly improving the accuracy of the drive and ensuring the precise lateral, longitudinal, and vertical movement of the scraper 3.

[0039] Compared with existing technologies, this invention utilizes a lifting drive mechanism 4 to drive the scraper 3 upward, and then a lateral drive mechanism 5 to drive the scraper 3 to move laterally horizontally, bringing the scraper 3 closer to the electrode 200. Subsequently, the lifting drive mechanism 4 drives the scraper 3 downward, allowing the scraper 3 to cut into the arc-shaped side of the electrode 200 from above. This avoids the force exerted on the scraper 3's blade by the roller 2 and the coating from the front, thus greatly reducing the possibility of blade deformation or chipping and significantly extending the service life of the scraper 3. Furthermore, maintaining the integrity of the scraper 3's blade ensures the stability and accuracy of coating scraping. In addition, when the scraper 3 cuts into the arc-shaped side of the electrode 200 from above, it initially scrapes away part of the coating, softening it. This reduces the impact on the scraper 3 as the electrode 200 moves along the roller surface, thus reducing the likelihood of the scraper 3 retracting. Therefore, it further ensures the stability and accuracy of coating scraping.

[0040] Please see Figures 10 to 12 The electrode coating scraping method in Embodiment 2 of the present invention uses the same equipment as in Embodiment 1, and includes the following steps: S1: The electrode 200 is mounted onto the electrode driving device 1, such that the electrode 200 is attached to the roller surface of the roller shaft 2 of the electrode driving device 1, and the blade of the scraper 3 is horizontally aligned with the tangent 21 between the arcuate side surface of the electrode 200 and the vertical plane. The blade is parallel to the tangent 21. This ensures the uniformity of coating scraping and improves the accuracy of detection.

[0041] S2: The scraper 3 is driven to rise by the lifting drive mechanism 4, so that the blade of the scraper 3 is higher than the tangent 21.

[0042] S3: The lateral drive mechanism 5 drives the scraper 3 to move laterally horizontally, so that the blade of the scraper 3 moves above the electrode 200, and the lateral distance between the blade of the scraper 3 and the tangent 21 is equal to the minimum thickness of the coating scraped off.

[0043] S4: The lifting drive mechanism 4 is used to drive the scraper 3 to descend to the horizontal position of step S1, so that the blade of the scraper 3 cuts into the coating of the electrode 200.

[0044] S5: The electrode 200 is driven to move relative to the scraper 3 by the electrode driving device 1, so that the scraper 3 scrapes off the coating.

[0045] S6: Reset the scraper 3 to the position of step S1; use the longitudinal drive mechanism 6 to drive the scraper 3 to move longitudinally and horizontally by at least the distance of the coating scraping width.

[0046] S7: Repeat steps S2 to S5 to scrape the coating off another location on the electrode 200. This allows for scraping the coating off different locations on the electrode 200 in the width direction, which helps to quickly analyze the material composition and distribution of the coating and improves the convenience of testing.

[0047] S8: Repeat steps S6 to S7 to scrape the coating at different longitudinal positions of the electrode 200.

[0048] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the scope of the present invention are still within the scope of the present invention.

Claims

1. A method for scraping electrode coating, characterized in that, Includes the following steps: S1: Install the electrode sheet onto the electrode sheet driving device, so that the electrode sheet is attached to the roller surface of the roller shaft of the electrode sheet driving device, and make the blade of the scraper horizontally aligned with the tangent between the arc-shaped side surface of the electrode sheet and the vertical plane. S2: The scraper is driven to rise using a lifting drive mechanism, so that the blade of the scraper is higher than the tangent line; S3: The scraper is driven to move laterally horizontally using a lateral drive mechanism, so that the blade of the scraper moves above the electrode sheet, and the lateral distance between the blade of the scraper and the tangent is equal to the minimum thickness of the coating scraped off. S4: The lifting drive mechanism is used to drive the scraper down to the horizontal position of step S1, so that the blade of the scraper cuts into the coating of the electrode sheet; S5: The electrode is driven by the electrode driving device to move relative to the scraper, so that the scraper scrapes off the coating.

2. The electrode coating scraping method according to claim 1, characterized in that, It also includes step S6: repeating steps S2 to S5 to scrape the coating from light to dark at the same location of the electrode.

3. The electrode coating scraping method according to claim 1, characterized in that, It also includes the following steps: S6: Reset the scraper to the position of step S1; use the longitudinal drive mechanism to drive the scraper to move longitudinally and horizontally by at least the width of the coating scraping; S7: Repeat steps S2 to S5 to scrape off the coating at another location on the electrode.

4. The electrode coating scraping method according to claim 3, characterized in that, It also includes step S8: repeating steps S6 to S7 to scrape the coating off at different longitudinal positions of the electrode sheet.

5. The electrode coating scraping method according to claim 1, characterized in that: The scraper includes a blade tip and a blade body, with the blade tip having a bent structure relative to the blade body.

6. The electrode coating scraping method according to claim 1, characterized in that: The electrode thickness is 100um-300um, the coating thickness is 60um-200um, and the depth of the coating scraped by the scraper is 10um-60um each time.

7. The electrode coating scraping method according to claim 1, characterized in that: The blade edge is parallel to the tangent.

8. The electrode coating scraping method according to claim 1, characterized in that: The lifting drive mechanism includes a lifting servo motor, a first lead screw, and a lifting platform. The scraper is disposed on the lifting platform. The output end of the lifting servo motor is connected to one end of the first lead screw, and the other end of the first lead screw is threadedly connected to the lifting platform to drive the lifting platform to rise or fall.

9. The electrode coating scraping method according to claim 8, characterized in that: The lateral drive mechanism includes a lateral servo motor, a second lead screw, and a lateral slide. The lifting drive mechanism is mounted on the lateral slide. The output end of the lateral servo motor is connected to one end of the second lead screw, and the other end of the second lead screw is threadedly connected to the lateral slide to drive the lateral slide to move laterally.

10. The electrode coating scraping method according to claim 9, characterized in that: The longitudinal drive mechanism includes a longitudinal servo motor, a third lead screw, and a longitudinal slide. The longitudinal drive mechanism is disposed on the transverse slide, and the lifting drive mechanism is disposed on the longitudinal slide. The output end of the longitudinal servo motor is connected to one end of the third lead screw, and the other end of the third lead screw is threadedly connected to the longitudinal slide to drive the longitudinal slide to move longitudinally.

Images