Roller surface cleaning system

Abstract

The application provides a roll surface cleaning system, a center console is configured to: acquire a cleaning parameter of a cleaning device and a roll parameter of a roller press; preliminarily partition an outer surface of the roller press according to the cleaning parameter and the roll parameter, and obtain a plurality of large cleaning areas which are arranged along an axial direction of the roller press once, and the plurality of large cleaning areas completely cover the outer surface of the roller press; finely partition the large cleaning areas according to the cleaning parameter and the roll parameter, and obtain a plurality of small cleaning areas which are arranged along a circumferential direction of the roller press in sequence and completely cover the large cleaning areas; control a galvanometer device to drive a laser to perform small-area cleaning on the small cleaning areas in a current large cleaning area; and when the small cleaning areas in the current large cleaning area are determined to be cleaned, control a driver to drive the galvanometer device to move to a next large cleaning area and perform a small-area cleaning operation. In the application, the driver is controlled to drive the cleaning device to move to the next large cleaning area, and the next large cleaning area is cleaned, so that the cleaning can be completed without stopping the roller press.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery production technology, and particularly relates to a roller surface cleaning system. Background Technology

[0002] In the production of lithium-ion battery anodes, the electrode sheet is subjected to high extrusion pressure as it passes through the rollers, compressing it to a certain thickness. The electrode sheet also exerts a similar reaction force on the rollers. Under this high pressure, some of the coating on the electrode sheet transfers to the roller surface. Large particles adhering to the roller surface can leave indentations on the electrode sheet upon subsequent contact, resulting in defective and scrapped electrodes. If regularly occurring, point-like defective products flow to the next process to produce batteries, lithium plating will occur. Roller coating adhesion occurs during high-speed production and is usually only detected when the machine is stopped. Roller coating adhesion can lead to a large number of scrapped electrodes during continuous production.

[0003] Currently, the common cleaning methods are to manually clean the surface of the roller press by using a scraper at high frequency or by rubbing the surface of the roller press with non-woven fabric. However, the roller press rotates at a relatively high speed, and manual cleaning requires stopping the machine for cleaning, which cannot meet the needs of on-site production or the requirements of high-speed, non-stop production of the roller press. In addition, manual cleaning not only has the disadvantage of high cost, but also carries the risk of cleaning agents remaining on the electrode sheets. Summary of the Invention

[0004] The main objective of this invention is to propose a roller surface cleaning system that aims to solve the technical problem that the cleaning of existing roller presses cannot meet the requirements of high-speed, non-stop production.

[0005] To achieve the above objectives, the present invention provides a roller surface cleaning system for cleaning a roller press, the roller surface cleaning system comprising:

[0006] A cleaning device includes a galvanometer and a driver and a laser connected to the galvanometer. The driver is used to drive the galvanometer to move along a large cleaning area, the galvanometer is used to drive the laser to move within a small cleaning area, and the laser is used to emit a dust removal laser towards the roller press.

[0007] The central control panel, the galvanometer, and the driver are all electrically connected to the central control panel, which is configured as follows:

[0008] Obtain the cleaning parameters of the cleaning device and the roll parameters of the roller press;

[0009] The outer surface of the roller press is initially divided according to the cleaning parameters and the roll parameters to obtain multiple large cleaning zones that are set along the axial direction of the roller press, and the multiple large cleaning zones completely cover the outer surface of the roller press.

[0010] The large cleaning area is further subdivided according to the cleaning parameters and the roll parameters to obtain multiple small cleaning areas that are arranged sequentially along the circumference of the roll press and completely cover the large cleaning area.

[0011] The galvanometer is controlled to drive the laser to perform small-area cleaning of the small cleaning area within the current large cleaning area;

[0012] Once it is determined that the cleaning of the small cleaning area within the current large cleaning area is completed, the driver is controlled to move the galvanometer to the next large cleaning area and perform a small area cleaning operation.

[0013] In this embodiment of the invention, the central control console is configured to control the galvanometer to drive the laser to perform small-area cleaning of the small cleaning area within the current large cleaning area, including:

[0014] The first driving speed of the galvanometer, the spot area of ​​the laser, and the rotational speed of the roller press are obtained.

[0015] The laser scanning width of the galvanometer and the single-wave period of the galvanometer moving along a single small cleaning area are obtained based on the first driving speed, the spot area, and the rotation speed, so that the motion trajectory of the laser completely covers the single small cleaning area within the single-wave period.

[0016] In this embodiment of the invention, the central control console is configured to control the galvanometer to drive the laser to perform small-area cleaning of the small cleaning area within the current large cleaning area, further comprising:

[0017] The galvanometer is controlled to drive the laser to reciprocate along the axial direction of the roller press;

[0018] Determine if the smaller cleaning areas within the larger cleaning area are not yet cleaned, and obtain the dwell time.

[0019] Control the driver to stop driving during the dwell time.

[0020] In this embodiment of the invention, the central control console is configured to acquire the dwell time including:

[0021] The number of partitions in the small cleaning zone and the single-frame period of the galvanometer movement along a single small cleaning zone are obtained;

[0022] The dwell time of the drive in a single large cleaning zone is calculated based on the number of partitions and the single-cycle period.

[0023] In this embodiment of the invention, the single-frame period of the galvanometer moving along a single small clean zone is calculated according to the following formula:

[0024] t = πD / v1;

[0025] t is the single-amplitude period of the galvanometer moving along a single small cleaning zone;

[0026] D is the diameter of the rolls in the roller press;

[0027] v1 is the rotational speed of the roller press.

[0028] In this embodiment of the invention, the number of partitions in the small cleaning area is calculated according to the following formula:

[0029] N4 = d / (N-1);

[0030] N4 represents the number of partitions in the small cleaning area;

[0031] d is the preset width of the large cleaning area;

[0032] N is the laser scanning width of laser 12.

[0033] In this embodiment of the invention, the laser scanning width of the galvanometer is calculated according to the following formula:

[0034] N = v2 * n / 2v1;

[0035] v2 is the first driving speed of the galvanometer;

[0036] v1 is the rotational speed of the roller press;

[0037] N is the laser scanning width of the laser;

[0038] n*n represents the laser spot area.

[0039] In this embodiment of the invention, the central control console is further configured as follows:

[0040] When the roller press is started, the rate of change of the rotational speed of the roller press within a preset time period is obtained;

[0041] If the rate of change exceeds a preset range, the cleaning device shall be shut down.

[0042] If the rate of change is determined not to exceed a preset range, the cleaning device is activated.

[0043] In this embodiment of the invention, the cleaning device further includes a dust removal hood, a dust removal pipe, and a dust collector connected in sequence. The dust removal hood is connected to the driver. The dust removal hood is used to completely cover the laser landing point of the laser. The dust collector is used to collect dust through the dust removal pipe.

[0044] In this embodiment of the invention, the roller press includes two rolls, and two cleaning devices are arranged in a one-to-one correspondence with the two rolls. The two cleaning devices are arranged radially opposite to the roller press. The roller surface cleaning system also includes a scraper mechanism for scraping dust off the surface of the roller press. The two scraper mechanisms are located between the two cleaning devices, and the two scraper mechanisms are arranged in a one-to-one correspondence with the two rolls.

[0045] Through the above technical solutions, the roller surface cleaning system provided by the embodiments of the present invention has the following beneficial effects:

[0046] When cleaning the roller surface of a roller press using a roller surface cleaning system, the cleaning parameters of the cleaning device and the roller parameters of the roller press can be obtained through a central control console. Based on these parameters, the outer surface of the roller press is initially divided into multiple large cleaning zones arranged axially along the roller press, completely covering its outer surface. Then, based on the cleaning and roller parameters, these large cleaning zones are further refined into multiple smaller zones arranged circumferentially along the roller press, completely covering its outer surface. The invention features a small cleaning area covered by a galvanometer and a roller press. Based on the specific parameters of the galvanometer and the roller press, initial and refined zoning is performed. While the roller press rotates, the central control unit controls the cleaning device to sequentially clean the smaller cleaning areas within multiple large cleaning areas along the axial direction. The dust-removing laser effectively cleans contaminants on the roller surface, resulting in excellent roller cleaning performance. No manual cleaning is required, enabling 24 / 7 high-speed production without stopping the roller press for cleaning, improving equipment OEE, and preventing the production of batches of defective electrode sheets. Furthermore, once invested, no further auxiliary materials are needed, resulting in low operating costs and simple maintenance. In this invention, after initial zoning of the roller press surface, further refined zoning is performed within the large cleaning area. Simultaneously, the galvanometer moves along the roller press axial direction, coordinating with the roller press's rotation, allowing the cleaning device to effectively clean the smaller cleaning areas. After cleaning multiple smaller cleaning areas within the current large cleaning area, the central control unit controls the driver to move the cleaning device to the next large cleaning area for cleaning, completing the cleaning process without stopping the roller press.

[0047] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0048] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0049] Figure 1 This is a schematic diagram of the roller surface cleaning system according to an embodiment of the present invention from a certain perspective;

[0050] Figure 2 This is a schematic diagram of the roller surface cleaning system according to an embodiment of the present invention from another perspective;

[0051] Figure 3 This is a schematic diagram of the structure of a roller surface cleaning system according to another embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram of roller surface partitioning according to an embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of the roller surface according to another embodiment of the present invention.

[0054] Explanation of reference numerals in the attached figures

[0055] Label Name Label Name

[0056] 100 Roller Surface Cleaning System 2 Scraper Mechanism

[0057] 1. Cleaning device; 3. Central control panel

[0058] 11-Drive 200 Roller Press

[0059] 12 Lasers 210 Rolls

[0060] 13 Dust Collection Cover Detailed Implementation

[0061] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0062] The roller surface cleaning system according to the present invention is described below with reference to the accompanying drawings.

[0063] like Figures 1 to 3 As shown, in an embodiment of the present invention, the roller surface cleaning system 100 is used to clean the roller press 200, and the roller surface cleaning system 100 includes:

[0064] The cleaning device 1 includes a galvanometer and a driver 11 and a laser 12 connected to the galvanometer. The driver 11 is used to drive the galvanometer to move along a large cleaning area, and the galvanometer is used to drive the laser 12 to move within a small cleaning area. The laser 12 is used to emit a dust removal laser to the roller press 200.

[0065] The center console 3, the galvanometer, and the driver 11 are all electrically connected to the center console 3. The center console 3 is configured as follows:

[0066] Obtain the cleaning parameters of cleaning device 1 and the roll parameters of roller press 200;

[0067] The outer surface of the roller press 200 is initially divided according to the cleaning parameters and the roll parameters to obtain multiple large cleaning zones that are set along the axial direction of the roller press 200 at one time, and the multiple large cleaning zones completely cover the outer surface of the roller press 200.

[0068] The large cleaning area is further subdivided according to the cleaning parameters and roll parameters to obtain multiple small cleaning areas that are set sequentially along the 200 circumference of the roll press and completely cover the large cleaning area.

[0069] The galvanometer drives the laser 12 to perform small-area cleaning within the current large cleaning area;

[0070] Once the cleaning of the small cleaning area within the current large cleaning area is completed, the control driver 11 drives the galvanometer to move to the next large cleaning area and perform the small area cleaning operation.

[0071] Understandably, the substances adhering to the roller surface of the roller press 200 include:

[0072] Solid powder (graphite, SP), non-sticky, component content > 98%;

[0073] Adhesives (SBR, LA136D, CMC, etc.), component content <2%;

[0074] The dust removal laser emitted by laser 12 is absorbed by the carbon layer on the roller surface of the roller press 200, generating optical vibration. The instantaneous absorption of high energy forms a rapidly expanding plasma (a highly ionized unstable gas), generating a shock wave. The shock wave breaks the contaminants into fragments and removes them. The dust removal laser emitted by laser 12 has a sufficiently short pulse width to avoid heat accumulation that damages the treated surface. At the same time, the high-energy absorption also manifests as an instantaneous temperature rise, forming photodecomposition, causing the binder contained in the carbon layer to vaporize or carbonize and detach from the roller surface. The roller surface and the carbon layer expand at different rates due to heat, forming photo-peeling, and the contaminant layer is peeled off from the roller surface.

[0075] The roller surface of the roller press 200 is chromium-plated. Chromium (Cr) has three absorption peaks in its atomic absorption spectrum, with wavelengths ranging from 340 to 360 nm. As the wavelength increases, the reflection increases and the absorption decreases. Graphite material exhibits a certain selectivity in its absorption of different light wavelengths. In the ultraviolet region (200-400 nm), the absorption value of graphite is relatively low. In the visible light region, graphite material absorbs blue and red light wavelengths more strongly. In the region >1000 nm, the absorption value gradually decreases as the wavelength increases. In this embodiment, the dust removal laser emitted by the laser 12 can be a laser with a wavelength near red light, which is more suitable for laser wiping rollers. Specifically, a 1024 μm fiber laser 12 is selected to ensure that more energy is absorbed by the surface carbon layer.

[0076] Plasma is generated when the energy density is above a threshold, which depends on the material itself. Effective cleaning can be achieved while ensuring the safety of the substrate material. Laser parameters can be adjusted according to the material's characteristics to ensure the energy density of the light pulse is strictly between two thresholds (carbon layer absorption energy density threshold < laser energy density < (roller surface) chromium plating absorption energy density threshold).

[0077] It should be noted that the laser spot of laser 12 can be one of the following two types:

[0078] Gaussian spot: high energy density at the center, small M2 value, small focused spot, and low single-pulse energy;

[0079] Flat-top spot: uniform energy distribution, large M2 value, large focused spot, and large single-pulse energy;

[0080] In one embodiment, to ensure that the energy density of the laser pulse is strictly between two thresholds, the dust removal laser emitted by the laser 12 is a flat-topped spot with uniform energy distribution, resulting in a softer and easier-to-control surface processing. The large spot size and high energy result in high processing efficiency, and the cleaning efficiency is extremely high at the same power.

[0081] In this embodiment, the roller press 200 is mainly used for the production of lithium battery negative electrodes, and the roller surface cleaning system 100 is mainly used for cleaning the roller surface of the roller press 200. The structure of the roller press 200 is as follows: Figure 1 and Figure 2 As shown, the roller press 200 includes two rollers 210, with the axial direction of the two rollers 210 being left-right, and the two rollers 210 are arranged sequentially in the up-down direction. The central control console 3 may include a host computer and a control screen, and one central control console 3 can connect to multiple cleaning devices 1. The driver 11 may adopt a mechanical slide and a connecting rod, and the axial direction of the connecting rod is the same as that of the rollers 210.

[0082] When cleaning the roller surface of the roller press 200 using the roller surface cleaning system 100 in this embodiment, the cleaning parameters of the cleaning device 1 and the roll parameters of the roller press 200 can be obtained through the central control console 3. Based on the cleaning parameters and roll parameters, the outer surface of the roller press 200 is initially divided into multiple large cleaning zones arranged axially along the roller press 200, completely covering the outer surface of the roller press 200. Further, based on the cleaning parameters and roll parameters, the large cleaning zones are further subdivided into multiple smaller cleaning zones arranged circumferentially along the roller press 200, completely covering the large cleaning zones. Small cleaning area; based on the specific parameters of the galvanometer and roller press 200, preliminary and detailed zoning is carried out. While the roller press 200 is rotating, the central control console 3 can control the cleaning device 1 to clean the small cleaning areas in multiple large cleaning areas sequentially along the axial direction. The dust removal laser can effectively clean the contaminants on the roller surface, resulting in good roller wiping effect. No manual cleaning is required, and the roller press 200 can achieve high-speed production without stopping the roller wiping 24 hours a day, improving the equipment OEE, avoiding the production of batches of defective electrode sheets, and at the same time, no other auxiliary materials need to be continuously input after the initial investment, resulting in low operation and maintenance costs and simple maintenance. In this embodiment, after initially dividing the roller surface of the roller press 200 into sections, the sections are further refined within the large cleaning area. This allows the galvanometer to move along the axial direction of the roller press 200 while coordinating with the rotational motion of the roller press 200, enabling the cleaning device 1 to effectively clean the smaller cleaning areas. After cleaning multiple smaller cleaning areas within the current large cleaning area, the central control console 3 can control the driver 11 to drive the cleaning device 1 to move to the next large cleaning area for cleaning. This process can be completed without stopping the roller press 200.

[0083] In this embodiment, the laser 12 can be a fiber laser 12, which can emit a flat-top light on the cleaning roller surface. The central control panel 3 can control the output power of the laser of the fiber laser 12. The galvanometer can shape the laser beam emitted by the fiber laser 12 and irradiate it onto the cleaning position of the roller press 200, and can control the trajectory of the laser.

[0084] In one embodiment, the central control unit 3 is configured to control the galvanometer to drive the laser 12 to perform small-area cleaning on small cleaning areas within the current large cleaning area, including:

[0085] The first driving speed of the galvanometer, the spot area of ​​the laser 12, and the rotational speed of the roller press 200 are obtained.

[0086] The laser scanning width of the galvanometer and the single-wave period of the galvanometer moving along a single small clean area are obtained based on the laser scanning width, spot area and rotation speed, so that the motion trajectory of the laser 12 completely covers the single small clean area within the single-wave period.

[0087] In this embodiment, the cleaning parameters of the cleaning device 1 include at least the laser scanning width of the galvanometer and the spot area of ​​the laser 12, and the roll parameters of the roller press 200 include at least the rotational speed of the roller press 200. In this embodiment, by obtaining the first driving speed of the galvanometer, the spot area of ​​the laser 12, and the rotational speed of the roller press 200, and accordingly adjusting the first driving speed of the galvanometer and the single-wave period of the galvanometer's movement along a single small cleaning area, the movement trajectory of the laser 12 can completely cover the single small cleaning area within a single-wave period. This allows the roller surface cleaning system 100 to adapt to roller presses 200 with different rotational speeds and improves cleaning efficiency.

[0088] It should be noted that the central control panel 3 is configured to control the galvanometer to drive the laser 12 to perform small-area cleaning within the current large cleaning area, which also includes:

[0089] The galvanometer is controlled to drive the laser 12 to reciprocate along the axial direction of the roller press 200;

[0090] Determine if any small cleaning areas within the current large cleaning area have not been cleaned, and obtain the dwell time.

[0091] Control driver 11 to stop driving during the dwell time.

[0092] In this embodiment, when the cleaning device 1 is in a small area cleaning state, the central control console 3 can control the driver 11 to stop driving during the dwell time, which can avoid the driver 11 interfering with the cleaning device 1. After determining that the small cleaning area within the current large cleaning area has been cleaned, the central control console 3 controls the driver 11 to drive the galvanometer to move to the next large cleaning area and perform the small area cleaning operation.

[0093] In one embodiment, the central control panel 3 is configured to acquire the dwell time including:

[0094] Obtain the number of partitions in the small cleaning zone and the single-frame period of the galvanometer movement along a single small cleaning zone;

[0095] The dwell time of drive 11 in a single large cleaning zone is calculated based on the number of partitions and the single-cycle period.

[0096] In this embodiment, the dwell time is obtained by specifically determining the number of small cleaning zones and the single-wave cycle of the galvanometer moving along a single small cleaning zone, which enables precise control of the dwell time of the driver 11.

[0097] Specifically, the single-frame period of the galvanometer moving along a single small clean zone is calculated using the following formula:

[0098] t = πD / v1;

[0099] t is the single-amplitude period of the galvanometer moving along a single small clean zone;

[0100] D is the diameter of the rolls in the 200 roller press;

[0101] v1 is the rotational speed of the roller press 200.

[0102] In this embodiment, the formula enables quantitative calculation of the single-width cycle, resulting in higher control precision for the roll surface cleaning system 100. Furthermore, it integrates the roll diameter and rotational speed of the roll press 200, allowing the roll surface cleaning system 100 to adapt to roll presses 200 with different operating parameters. This ensures the system remains usable even when roll press 200 parameters change, significantly improving its compatibility.

[0103] Furthermore, with a margin of >3mm on each side of the electrode, the number of small cleaning zones is calculated using the following formula:

[0104] N4 = d / (N-1);

[0105] N4 represents the number of partitions in the small cleaning area;

[0106] d is the preset width of the large cleaning area;

[0107] N is the laser scanning width of laser 12.

[0108] In this embodiment, the number of small cleaning areas can be obtained by acquiring the preset width of the large cleaning area and the laser scanning width of the laser 12. Different numbers of small cleaning areas can be used for different large cleaning areas and laser 12, so that the small area cleaning operation can be adapted to different large cleaning areas and laser parameters.

[0109] In one embodiment, the laser scanning width of the galvanometer is calculated according to the following formula:

[0110] N = v2 * n / 2v1;

[0111] v2 is the first driving speed of the galvanometer;

[0112] v1 is the rotational speed of the roller press 200;

[0113] N is the laser scanning width of laser 12;

[0114] n*n represents the area of ​​the laser spot of laser 12.

[0115] In this embodiment, the laser scanning width of the galvanometer can be quantitatively calculated by obtaining the first driving speed of the galvanometer, the rotational speed of the roller press 200, the laser scanning width of the laser 12, and the spot area of ​​the laser 12, so as to accurately obtain the laser scanning width of the galvanometer.

[0116] Specifically, in one embodiment, with a margin of >3mm reserved on both sides of the electrode, the central control console 3 can obtain the preset width of the large cleaning area and the laser scanning width of the laser 12, and calculate the number of partitions of the large cleaning area using the preset width of the large cleaning area and the laser scanning width of the laser 12:

[0117] N3 = (M+6) / d;

[0118] M < L;

[0119] N3 is the number of partitions in the large cleaning area;

[0120] M is the width of the electrode sheet rolled by the roller press (200);

[0121] d is the preset width of the large cleaning area;

[0122] L is the length of the rolls of the roller press (200).

[0123] In this embodiment, the number of sections of the large cleaning area can be obtained by acquiring the width of the electrode sheet rolled by the roller press 200, the preset width of the large cleaning area, and the length of the roller press 200 (i.e., the axial length). Different numbers of large cleaning sections can be used for different roller parameters, so that the large area cleaning operation can be adapted to different roller parameters.

[0124] Specifically, the single-cycle, the number of partitions in the small cleaning zone, the number of partitions in the large cleaning zone, the width of the electrode sheet rolled by the roller press 200, the preset width of the large cleaning zone, and the second driving speed of the driver 11 can be obtained, and the entire cycle of surface cleaning of the roller press 200 by the driver 11 can be calculated using the above parameters:

[0125] T = t * N4 * N3 + (Md) / v3;

[0126] T represents the entire cycle of surface cleaning completed by the drive 11 and the roller press 200;

[0127] t is the single-amplitude period of the galvanometer moving along a single small clean zone;

[0128] N4 represents the number of partitions in the small cleaning area;

[0129] N3 represents the number of zones in the large cleaning area;

[0130] M is the width of the electrode sheet rolled by the roller press 200;

[0131] d is the preset width of the large cleaning area;

[0132] v3 is the second drive speed of driver 11.

[0133] Where d = N² / 2;

[0134] d is the preset width of the large cleaning area;

[0135] N2 is the maximum range of motion of the field lens.

[0136] In this embodiment, by combining the cleaning parameters of the cleaning device 1 and the roll parameters of the roller press 200, the driver 11 calculates the full-width cycle of surface cleaning of the roller press 200, which enables the roller surface cleaning system 100 to adapt to different rotation speeds of the roller press 200.

[0137] In this embodiment of the invention, the central control console 3 is further configured as follows:

[0138] When the roller press 200 is started, obtain the rate of change of the rotational speed of the roller press 200 within a preset time period.

[0139] If the rate of change exceeds the preset range, shut down cleaning device 1.

[0140] If the rate of change is determined to be within the preset range, start the cleaning device 1.

[0141] In this embodiment, the central control console 3 is connected to the roller press 200 and can obtain the start signal of the roller press 200. When the roller press 200 is started, the rotational speed of the roller press 200 within a preset time period is obtained, and the rate of change of the rotational speed of the roller press 200 within the preset time period is determined. The rate of change can accurately determine whether the roller press 200 is in the production parameter change stage. If the rate of change is determined to exceed the preset change range, it can be determined that the roller press 200 is in the production parameter change stage, and the cleaning device 1 is shut down to avoid the cleaning device 1 accidentally cleaning the electrode. If the rate of change is determined not to exceed the preset change range, it can be determined that the roller press 200 is in the stable production stage, and the cleaning device 1 is started to adapt to the current production parameters.

[0142] like Figure 2 and Figure 3 The cleaning device 1 also includes a dust hood 13, a dust collection pipe, and a dust collector connected in sequence. The dust hood 13 is connected to the driver 11. The dust hood 13 is used to completely cover the laser landing point of the laser 12. The dust collector is used to collect dust through the dust collection pipe. The dust collector can be an explosion-proof dust collector. One dust collector can be connected to multiple dust hoods 13 through the dust collection pipe. The galvanometer can be connected to a mechanical slide through the dust hood 13 to ensure that the galvanometer and the dust hood 13 operate synchronously.

[0143] Specifically, the roller press 200 includes two rollers 210, two cleaning devices 1 and two rollers 210 are arranged in a one-to-one correspondence, and the two cleaning devices 1 are arranged radially opposite to the roller press 200. The roller surface cleaning system 100 also includes a scraper mechanism 2 for scraping dust from the surface of the roller press 200. The two scraper mechanisms 2 are located between the two cleaning devices 1, and the two scraper mechanisms 2 and two rollers 210 are arranged in a one-to-one correspondence. In this embodiment, the scraper mechanism 2 is always in contact with the roller surface of the roller press 200. During the rotation of the rollers 210, the scraper mechanism 2 can assist in cleaning large particle residues. The roller surface cleaning system 100 can be equipped with two cleaning devices 1, and the two rollers 210 are arranged in the vertical direction. The two cleaning devices 1 can be respectively arranged on the upper and lower sides of the roller press 200. In this embodiment, the resin scraper of the scraper mechanism 2 is in contact with the roller surface and can clean the residual particulate matter after laser roller cleaning. The particulate matter is collected by the dust collection box below the scraper mechanism 2 and then processed. The dust cover 13 completely covers the laser landing point of the laser 12, and can perform negative pressure dust removal and adsorption on the laser cleaning point. The negative pressure wind speed of >20m / S will draw away all the generated dust through the dust removal pipe. The configured explosion-proof dust collector can handle the corresponding dust.

[0144] The entire roller surface is divided into several large cleaning zones. After the dotted laser cleans one large cleaning zone along the belt direction, it moves to the next large cleaning zone to continue cleaning, and the cycle repeats.

[0145] like Figure 4 and Figure 5 As shown, in one embodiment, the roll parameters of the roller press 200 to be cleaned are:

[0146] The width of the electrode sheet rolled by the 200 roller press is 558mm;

[0147] The rotational speed of the roller press 200 is 20 m / min;

[0148] The roll length is 800mm;

[0149] The diameter of the roll is 800 mm;

[0150] Cleaning parameters of cleaning device 1:

[0151] The first driving speed of the galvanometer can be 20000 mm / s;

[0152] The second driving speed of the driver 11 can be 100 mm / s;

[0153] The maximum range of motion for the field lens is 175mm;

[0154] The spot area of ​​laser 12 can be 1*1mm.

[0155] Specifically, for an electrode coating width of 558mm, a 1mm allowance can be reserved on both sides of the electrode coating width, so that the total cleaning width of the large cleaning area is 560mm. The entire roller surface area is divided into 5 large cleaning areas, each with a width of 112mm. The laser movement range is within the maximum movement range of the field lens (175mm). A 0.5mm overlap area can be set between two adjacent large cleaning areas. The specific overlap width can be adjusted appropriately according to the usage effect.

[0156] Each large cleaning area can be divided into 4 zones, and the parameters for each small cleaning zone are as follows;

[0157] The laser scanning width can be (0.5 / 20000*60*20000=30), with a 0.5mm overlap area set between two adjacent small cleaning areas, so the actual width can be 28.5mm;

[0158] The dwell time for each small cleaning area is (800π / 20000*60=7.536s). To ensure full cleaning coverage of each small cleaning area, the dwell time can be 7.7s-7.8s. To ensure full cleaning coverage of each large cleaning area, the dwell time for each large cleaning area can be 7.8*4=31.2s.

[0159] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0160] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0161] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0162] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A roller surface cleaning system for cleaning a roller press (200), characterized in that, The roller cleaning system (100) includes: The cleaning device (1) includes a galvanometer and a driver (11) and a laser (12) connected to the galvanometer. The driver (11) is used to drive the galvanometer to move along a large cleaning area, and the galvanometer is used to drive the laser (12) to move in a small cleaning area. The laser (12) is used to emit a dust removal laser to the roller press (200). The central control panel (3) is electrically connected to both the galvanometer and the driver (11). The central control panel (3) is configured as follows: Obtain the cleaning parameters of the cleaning device (1) and the roll parameters of the roller press (200); The outer surface of the roller press (200) is initially divided according to the cleaning parameters and the roll parameters to obtain multiple large cleaning zones that are set along the axial direction of the roller press (200) at one time, and the multiple large cleaning zones completely cover the outer surface of the roller press (200); The large cleaning area is further subdivided according to the cleaning parameters and the roll parameters to obtain multiple small cleaning areas that are arranged sequentially along the circumference of the roll press (200) and completely cover the large cleaning area; The galvanometer is controlled to drive the laser (12) to perform small-area cleaning on the small cleaning area within the current large cleaning area; Once it is determined that the cleaning of the small cleaning area within the current large cleaning area is completed, the driver (11) is controlled to drive the galvanometer to move to the next large cleaning area and perform the small area cleaning operation.

2. The roller surface cleaning system according to claim 1, characterized in that, The central control unit (3) is configured to control the galvanometer to drive the laser (12) to perform small-area cleaning of the small cleaning area within the current large cleaning area, including: The first driving speed of the galvanometer, the spot area of ​​the laser (12) and the rotational speed of the roller press (200) are obtained. The laser scanning width of the galvanometer and the single-wave period of the galvanometer moving along a single small cleaning area are obtained based on the first driving speed, the spot area and the rotation speed, so that the motion trajectory of the laser (12) completely covers the single small cleaning area within the single-wave period.

3. The roller surface cleaning system according to claim 2, characterized in that, The central control unit (3) is configured to control the galvanometer to drive the laser (12) to perform small-area cleaning of the small cleaning area within the current large cleaning area, and further includes: The galvanometer is controlled to drive the laser (12) to reciprocate along the axial direction of the roller press (200); Determine if the smaller cleaning areas within the larger cleaning area are not yet cleaned, and obtain the dwell time. Control the driver (11) to stop driving during the dwell time.

4. The roller surface cleaning system according to claim 3, characterized in that, The central control panel (3) is configured to acquire dwell time including: The number of partitions in the small cleaning zone and the single-frame period of the galvanometer movement along a single small cleaning zone are obtained; The dwell time of the drive (11) in a single large cleaning zone is calculated based on the number of partitions and the single-cycle period.

5. The roller surface cleaning system according to claim 4, characterized in that, The single-frame period of the galvanometer moving along a single small clean zone is calculated using the following formula: t = πD / v1; t is the single-amplitude period of the galvanometer moving along a single small cleaning zone; D is the diameter of the rolls of the roller press (200); v1 is the rotational speed of the roller press (200).

6. The roller surface cleaning system according to claim 4, characterized in that, The number of zones in the small cleaning area is calculated using the following formula: N4 = d / (N-1); N4 represents the number of partitions in the small cleaning area; d is the preset width of the large cleaning area; N is the laser scanning width of the laser (12).

7. The roller surface cleaning system according to any one of claims 2 to 6, characterized in that, The laser scanning width of the galvanometer is calculated using the following formula: N = v2 * n / 2v1; v2 is the first driving speed of the galvanometer; v1 is the rotational speed of the roller press (200); N is the laser scanning width of the laser (12); n*n is the area of ​​the laser spot of the laser (12).

8. The roller surface cleaning system according to any one of claims 1 to 6, characterized in that, The central control panel (3) is also configured as follows: When the roller press (200) is started, the rate of change of the rotational speed of the roller press (200) within a preset time period is obtained; If the rate of change exceeds the preset range, the cleaning device (1) is shut down. If the rate of change is determined not to exceed the preset range, the cleaning device (1) is activated.

9. The roller surface cleaning system according to any one of claims 1 to 6, characterized in that, The cleaning device (1) also includes a dust hood (13), a dust removal pipe and a dust collector connected in sequence. The dust hood (13) is connected to the driver (11). The dust hood (13) is used to completely cover the laser landing point of the laser (12). The dust collector is used to collect dust through the dust removal pipe.

10. The roller surface cleaning system according to any one of claims 1 to 6, characterized in that, The roller press (200) includes two rolls (210), and the two cleaning devices (1) and the two rolls (210) are arranged in a one-to-one correspondence. The two cleaning devices (1) are arranged diagonally relative to the roller press (200). The roller surface cleaning system (100) also includes a scraper mechanism (2) for scraping dust from the surface of the roller press (200). The two scraper mechanisms (2) are located between the two cleaning devices (1), and the two scraper mechanisms (2) and the two rolls (210) are arranged in a one-to-one correspondence.

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