Electrode sheet deviation correction method and winding system, controller, and computer-readable storage medium

Abstract

An electrode sheet deviation correction method and a winding system, a controller, and a computer-readable storage medium. The winding system comprises a winding device, a first electrode sheet insertion device, a first deviation correction device, a first photoelectric sensor, a camera, and a controller. The method comprises: the first electrode sheet insertion device inserts a first target electrode sheet to one side of a target separator; the first photoelectric sensor detects first photoelectric data corresponding to the first target electrode sheet; on the basis of first deviation information corresponding to the first photoelectric data, the controller controls the first deviation correction device to perform deviation correction on the first target electrode sheet; the camera acquires a first target image; and on the basis of second deviation information corresponding to the first target image, the controller controls the first deviation correction device to perform secondary deviation correction on the first target electrode sheet.

Description

Electrode alignment method and winding system, controller and computer-readable storage medium

[0001] This disclosure claims priority to Chinese Patent Application No. 202410924013.1, filed on July 10, 2024, entitled “Electrode Correction Method and Winding System”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of battery technology, and in particular to an electrode correction method, a winding system, a controller, and a computer-readable storage medium. Background Technology

[0003] A battery cell consists of electrodes and a separator, and the alignment between the electrodes and the separator directly affects the cell's safety and performance. During cell production, multiple electrodes and separators need to be wound together; therefore, the separator's coverage of the electrodes during winding is crucial. Before winding begins, the electrodes are inserted into the separator. This insertion action results in the electrode head being an unstable, free end, increasing the probability of electrode head misalignment and poor coverage. Summary of the Invention

[0004] This disclosure is intended to at least partially alleviate or resolve at least one of the aforementioned problems.

[0005] In one aspect of this disclosure, an electrode correction method is proposed, characterized in that it is applied to a winding system, the winding system including a winding device, a first electrode insertion device, a first correction device, a first photoelectric sensor, a camera, and a controller; the method includes: the first electrode insertion device inserts a first target electrode into one side of a target diaphragm, and the electrode head of the first target electrode is transmitted to the image acquisition area corresponding to the camera; the first target electrode includes a negative electrode or a positive electrode; during the insertion of the first target electrode, the first photoelectric sensor detects first photoelectric data corresponding to the first target electrode; the controller determines first offset information based on the first photoelectric data, and controls the first correction device to correct the first target electrode based on the first offset information; when the electrode head of the first target electrode reaches the image acquisition area, the camera acquires a first target image, the first target image including the electrode head of the first target electrode and the target diaphragm; the controller identifies the electrode head and the target diaphragm included in the first target image to obtain second offset information, and controls the first correction device to perform a second correction on the first target electrode based on the second offset information.

[0006] Optionally, the controller determines the first offset information based on the first photoelectric data, and controls the first correction device to correct the first target electrode based on the first offset information, including: the controller determines the first offset information based on the first photoelectric data; the controller controls the first correction device to perform at least one correction on the first target electrode according to the target displacement based on the first offset information.

[0007] Optionally, the winding system further includes a second electrode insertion device, a second correction device, and a second photoelectric sensor; the method further includes: the second electrode insertion device inserts a second target electrode into the other side of the target diaphragm, and the electrode head of the second target electrode is conveyed to the image acquisition area; the second target electrode and the first target electrode are different types of electrodes; during the insertion of the second target electrode, the second photoelectric sensor detects second photoelectric data corresponding to the second target electrode; the controller determines third offset data based on the second photoelectric data, and controls the second correction device to correct the second target electrode based on the third offset data; when the electrode head of the second target electrode reaches the image acquisition area, the camera acquires a second target image, the second target image including the electrode head of the second target electrode and the target diaphragm; the controller identifies the electrode head and the target diaphragm included in the second target image to obtain fourth offset data, and controls the second correction device to perform secondary correction on the second target electrode based on the fourth offset data.

[0008] Optionally, before the camera acquires the second target image, the method further includes: when the electrode head of the second target electrode reaches the image acquisition area, the controller controls the winding device to rotate to wind the target diaphragm and the first target electrode;

[0009] The camera acquires a second target image, including: if the rotation angle of the winding device reaches a preset angle, the controller controls the camera to acquire the second target image.

[0010] Optionally, the winding system further includes an electrode auxiliary device; before the camera acquires the first target image, the method further includes: when the electrode head of the first target electrode reaches the image acquisition area, the controller controls the electrode auxiliary device to bring the first target electrode close to the target diaphragm.

[0011] Optionally, the winding system further includes a film-coating device; the first electrode insertion device inserts the first target electrode into one side of the target diaphragm, and transmits the electrode head of the first target electrode to the image acquisition area corresponding to the camera, including: the first electrode insertion device inserts the first target electrode into one side of the target diaphragm, and transmits the electrode head of the first target electrode through the film-coating channel of the film-coating device to the image acquisition area corresponding to the camera; the film-coating channel of the film-coating device is used to bring the passing first target electrode and the target diaphragm together.

[0012] Optionally, before the first electrode insertion device inserts the first target electrode onto one side of the target diaphragm, the method further includes: the film-coating device controlling the channel width of the film-coating channel to increase; before the camera acquires the first target image, the method further includes: the film-coating device controlling the channel width of the film-coating channel to decrease; after the first correction device is controlled to perform secondary correction on the first target electrode according to the first image offset data, the method further includes: the winding device starting to rotate to wind the target diaphragm and the first target electrode.

[0013] In another aspect of this disclosure, a winding system is proposed, comprising: a winding device connected to a target diaphragm; a first electrode insertion device for inserting a first target electrode into one side of the target diaphragm; the first target electrode comprising a negative electrode or a positive electrode; a first correction device, a first photoelectric sensor, and an image acquisition area corresponding to a camera are sequentially arranged along the insertion direction of the first target electrode; the first photoelectric sensor is used to detect first photoelectric data during the insertion of the first target electrode, the first photoelectric data being used to instruct the first correction device to correct the first target electrode; the camera is used to acquire a first target image when the electrode head of the first target electrode reaches the image acquisition area corresponding to the camera; the first target image is used to instruct the first correction device to perform secondary correction on the first target electrode.

[0014] Optionally, the winding system further includes a second electrode insertion device, a second correction device, and a second photoelectric sensor; the second electrode insertion device is used to insert the second target electrode into the other side of the target diaphragm; the second target electrode and the first target electrode are different types of electrodes; along the insertion direction of the second target electrode, the second correction device, the second photoelectric sensor, and the image acquisition area corresponding to the camera are sequentially arranged; the second photoelectric sensor is used to detect second photoelectric data during the insertion of the second target electrode, and the second photoelectric data is used to determine the third offset information of the second target electrode; the camera is also used to acquire a second target image when the electrode head of the second target electrode reaches the image acquisition area; the second target image is used to determine the fourth offset information of the electrode head of the second target electrode relative to the target diaphragm; the second correction device is used to correct the second target electrode according to the third offset information during the insertion of the second target electrode, and to perform a second correction on the second target electrode according to the fourth offset information when the electrode head of the second target electrode reaches the image acquisition area.

[0015] Optionally, the winding system further includes an electrode auxiliary device for bringing the first target electrode or the second target electrode with its electrode head in the image acquisition area close to the target diaphragm.

[0016] Optionally, the winding system further includes a film-coating device, which is disposed after the first photoelectric sensor along the insertion direction of the first target electrode and after the second photoelectric sensor along the insertion direction of the second target electrode; the film-coating device is used to control the increase or decrease of the channel width of the film-coating channel.

[0017] In another aspect of this disclosure, a controller is proposed, comprising: a memory storing executable program code; and a processor that, when invoking the executable program code, implements the electrode correction method described in any of the preceding claims.

[0018] In another aspect of this disclosure, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium stores a computer program for causing a computer to perform the electrode correction method described in any of the preceding claims.

[0019] Therefore, the electrode correction method, winding system, controller, and computer-readable storage medium proposed in this disclosure allow a first electrode insertion device to insert a first target electrode into one side of a target diaphragm, and to transmit the electrode head of the first target electrode to the image acquisition area corresponding to the camera. The first target electrode may include a negative electrode or a positive electrode. During the insertion of the first target electrode, a first photoelectric sensor detects the first photoelectric data corresponding to the first target electrode. The controller can determine the first offset information based on the first photoelectric data, and control the first correction device to correct the first target electrode based on the first offset information. When the electrode head of the first target electrode reaches the image acquisition area, the camera can acquire the first target image. The controller can identify the electrode head and the target diaphragm contained in the first target image to obtain the second offset information, and control the first correction device to perform secondary correction on the first target electrode based on the second offset information. In the embodiments of this disclosure, during the insertion of the first target electrode, the controller can control the first correction device to perform a first correction on the first target electrode based on the first photoelectric data detected by the first photoelectric sensor. When the electrode head of the first target electrode reaches the image acquisition area, the controller can control the first correction device to perform a second correction on the first target electrode based on the acquired first target image. This solves the problem that the electrode head of the first target electrode shifts again after passing the first photoelectric sensor. Moreover, multiple correction processes can improve the accuracy of electrode correction. The corrected first target electrode can be properly coated by the target separator, reducing the probability of coating abnormalities and thus improving the yield of battery cell production. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1-A shows a system schematic diagram of a winding system according to an embodiment of the present disclosure;

[0022] Figure 1-B shows a system schematic diagram of a winding system according to another embodiment of the present disclosure;

[0023] Figure 2 shows a schematic flowchart of an electrode correction method according to an embodiment of the present disclosure;

[0024] Figure 3 shows a schematic flowchart of an electrode correction method according to another embodiment of the present disclosure;

[0025] Figure 4 shows a modular schematic diagram of an electrode correction device according to an embodiment of the present disclosure;

[0026] Figure 5 shows a structural block diagram of a controller according to an embodiment of the present disclosure.

[0027] Explanation of reference numerals in the attached drawings: Winding device 11; First correction device 12; First photoelectric sensor 13; Camera 14; Second correction device 15; Second photoelectric sensor 16; First target electrode 21; Target diaphragm 22; Second target electrode 23; Electrode correction device 400; Electrode insertion control module 410; Photoelectric detection control module 420; Primary correction control module 430; Image acquisition control module 440; Secondary correction control module 450; Memory 510; Processor 520. Detailed Implementation

[0028] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0029] It should be noted that the terms "comprising" and "having" and any variations thereof in this disclosure are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or devices.

[0030] It is understood that the terms "first," "second," etc., as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first target electrode may be referred to as a second target electrode, and similarly, a second target electrode may be referred to as a first target electrode. Both the first target electrode and the second target electrode are target electrodes, but they are not the same target electrode.

[0031] This disclosure provides an electrode correction method and winding system that can improve the accuracy of electrode correction, thereby increasing the yield rate of battery cell production.

[0032] The following will be described in detail with reference to the accompanying drawings.

[0033] As shown in Figure 1-A, which is a system schematic diagram of a winding system disclosed in an embodiment of this disclosure, the winding system may include a winding device 11, a first electrode insertion device (not shown), a first correction device 12, a first photoelectric sensor 13, a camera 14, and a controller (not shown). The controller may refer to an independently operating data processing device, such as a mobile phone, a laptop computer, or a PC (Personal Computer), but is not limited thereto.

[0034] The first electrode insertion device and controller are not shown in Figure 1-A. The first electrode insertion device is used to insert the first target electrode 21 into the target diaphragm 22. It is understood that during insertion, the portion of the first target electrode 21 after the first electrode insertion device is an uncontrolled free end, and the distance between the first electrode insertion device and the winding device 11 is relatively long, resulting in a longer free end. This can easily cause the electrode head of the first target electrode 21 to shift. Therefore, in this embodiment, not only is photoelectric correction performed once during the insertion of the first target electrode 21 by the first electrode insertion device, but a second correction is also required for the electrode head. This embodiment does not limit the structure or type of the first electrode insertion device. The first target electrode 21 may include a positive electrode or a negative electrode.

[0035] The winding device 11 can be connected to the target diaphragm 22. The winding device 11 may include a winding needle. The target diaphragm 22 can be pre-guided into the center seam of the winding needle via rollers, and the winding needle clamps the target diaphragm 22 in the center seam to prevent the target diaphragm 22 from slipping. It should be understood that, as shown in Figure 1-A, the winding needle may be composed of two sub-components, and the gap between the two sub-components is the center seam of the winding needle.

[0036] Optionally, the first electrode insertion device is used to insert the first target electrode 21 into one side of the target diaphragm 22. As shown in FIG1-A, the target diaphragm 22 may include two diaphragms. One side of the target diaphragm 22 may refer to the middle side of the two target diaphragms 22, and the other side of the target diaphragm 22 may refer to the non-middle side of the two target diaphragms 22. Optionally, the target diaphragm 22 may also refer to only one of the two diaphragms. One side of the target diaphragm 22 may refer to the side of the target diaphragm 22 closer to the other diaphragm, and the other side of the target diaphragm 22 may refer to the side of the target diaphragm 22 farther from the other diaphragm. Therefore, the first electrode insertion device is used to insert the first target electrode 21 into one side of the target diaphragm 22, or it may refer to inserting the first target electrode 21 into the middle of the two target diaphragms 22.

[0037] Along the insertion direction of the first target electrode 21, a first correction device 12, a first photoelectric sensor 13, and an image acquisition area corresponding to a camera 14 are sequentially arranged. Therefore, the electrode head of the first target electrode 21 can first pass through the first correction device 12, then reach the first photoelectric sensor 13, and finally be transmitted to the image acquisition area. The first correction device 12 is used to correct the first target electrode 21, the first photoelectric sensor 13 can detect the first photoelectric data corresponding to the first target electrode 21, and the camera 14 can acquire the first target image corresponding to the image acquisition area. The first target image refers to an image containing the electrode head of the first target electrode 21 and the target diaphragm 22. The first photoelectric data can be used to instruct the first correction device 12 to correct the first target electrode 21, and the first target image can be used to instruct the first correction device 12 to perform secondary correction on the first target electrode 21.

[0038] Optionally, the first photoelectric sensor 13 may include a through-beam photoelectric sensor, that is, the first photoelectric sensor 13 may include a transmitter and a receiver, which are respectively disposed on both sides of the first target electrode 21. The transmitter can emit a light beam, and after passing through the first target electrode 21, the receiver can receive part of the light beam emitted by the transmitter and convert it into first photoelectric data. It can be understood that the first photoelectric sensor 13 may be located at a preset position, and the controller also stores a processing algorithm that is calibrated according to the position of the first photoelectric sensor 13 to process the first photoelectric data detected by the first photoelectric sensor 13 to obtain the first offset information of the first target electrode 21.

[0039] Optionally, the first target image includes the electrode head of the first target electrode 21 and the target diaphragm 22. The controller can identify the electrode head of the first target electrode 21 and the target diaphragm 22 to obtain second offset information of the electrode head of the first target electrode 21 relative to the target diaphragm 22. Specifically, the controller can identify the edge information of the electrode head of the first target electrode 21 and the edge information of the target diaphragm 22 based on the first target image, thereby determining the difference between the edge information of the electrode head of the first target electrode 21 and the edge information of the target diaphragm 22, and obtaining the second offset information of the electrode head of the first target electrode 21 relative to the target diaphragm 22.

[0040] In one embodiment, the first electrode insertion device can insert the first target electrode 21 into one side of the target diaphragm 22, and transmit the electrode head of the first target electrode 21 to the image acquisition area corresponding to the camera 14. During the insertion of the first target electrode 21, the first photoelectric sensor 13 detects the first photoelectric data. The controller can determine the first offset information based on the first photoelectric data, and control the first correction device 12 to correct the first target electrode 21 based on the first offset information. When the electrode head of the first target electrode 21 reaches the image acquisition area, the camera 14 can acquire the first target image. The controller can identify the electrode head of the first target electrode 21 and the target diaphragm 22 contained in the first target image to obtain the second offset information, and control the first correction device 12 to perform secondary correction on the first target electrode 21 based on the second offset information.

[0041] As shown in Figure 1-B, which is a system schematic diagram of another winding system disclosed in this embodiment, the winding system may further include a second electrode insertion device, a second correction device 15, and a second photoelectric sensor 16. The second electrode insertion device and the controller are not shown in Figure 1-B. The second electrode insertion device is used to insert the second target electrode 23 into the target diaphragm 22. This embodiment does not limit the structure or type of the second electrode insertion device. The second target electrode 23 and the first target electrode 21 are different types of electrodes, such as the first target electrode 21 being a negative electrode and the second target electrode 23 being a positive electrode, or the first target electrode 21 being a positive electrode and the second target electrode 23 being a negative electrode. The second correction device 15 and the first correction device 12 can be the same type of correction device, and the second photoelectric sensor 16 and the first photoelectric sensor 13 can be the same type of photoelectric sensor.

[0042] Optionally, the first electrode insertion device is used to insert the second target electrode 23 to the other side of the target diaphragm 22, or it can refer to inserting the first target electrode 21 into a non-middle position between the two target diaphragms 22. Along the insertion direction of the second target electrode 23, a second correction device 15, a second photoelectric sensor 16, and an image acquisition area corresponding to the camera 14 are sequentially arranged. Therefore, the electrode head of the second target electrode 23 can first pass through the second correction device 15, then reach the second photoelectric sensor 16, and finally be transmitted to the image acquisition area.

[0043] The second correction device 15 can be used to correct the second target electrode 23. The second photoelectric sensor 16 can detect the second photoelectric data corresponding to the second target electrode 23. The camera 14 can acquire the second target image corresponding to the image acquisition area. The second target image refers to the image containing the electrode head of the second target electrode 23 and the target diaphragm 22. The second photoelectric data can be used to instruct the second correction device 15 to correct the second target electrode 23, and the second target image can be used to instruct the second correction device 15 to correct the second target electrode 23. The method of the second photoelectric sensor 16 detecting the second photoelectric data and the method of the controller processing the second photoelectric data can refer to the relevant content of the first photoelectric sensor 13 mentioned above, and will not be repeated here. The method of the controller processing the second target image can refer to the method of the controller processing the first target image mentioned above, and will not be repeated here either.

[0044] In one embodiment, the second electrode insertion device can insert the second target electrode 23 into the other side of the target diaphragm 22, and transmit the electrode head of the second target electrode 23 to the image acquisition area. During the insertion of the second target electrode 23, the second photoelectric sensor 16 can detect the second photoelectric data corresponding to the second target electrode 23. The controller can determine the third offset data based on the second photoelectric data, and control the second correction device 15 to correct the second target electrode 23 based on the third offset data. When the electrode head of the second target electrode 23 reaches the image acquisition area, the camera 14 can acquire the second target image. The controller can identify the electrode head of the second target electrode 23 and the target diaphragm 22 contained in the second target image to obtain the fourth offset data, and control the second correction device 15 to perform secondary correction on the second target electrode 23 based on the fourth offset data.

[0045] As an optional implementation, as shown in FIG1-B, the winding system may further include a film-coating device 17 in the insertion direction of the first target electrode 21 and / or the insertion direction of the second target electrode 23. The film-coating device 17 is disposed after the first photoelectric sensor 13 along the insertion direction of the first target electrode 21. The film-coating device 17 is disposed after the second photoelectric sensor 16 along the insertion direction of the second target electrode 23.

[0046] The first electrode insertion device inserts the first target electrode 21 onto one side of the target diaphragm 22, allowing the electrode head of the first target electrode 21 to pass through the bonding channel of the bonding device 17 and then be transmitted to the image acquisition area corresponding to the camera 14. Similarly, the second electrode insertion device inserts the second target electrode 23 onto the other side of the target diaphragm 22, allowing the electrode head of the second target electrode 23 to pass through the bonding channel of the bonding device 17 and then be transmitted to the image acquisition area corresponding to the camera 14.

[0047] By implementing this embodiment, the first target electrode 21 and / or the second target electrode 23 can be brought together with the target diaphragm 22, so that the electrode and the diaphragm in the first target image and the second target image can be directly compared, which reduces the difficulty of image processing and improves the accuracy of electrode correction.

[0048] Optionally, the film-coating device 17 may include a first film-coating roller and a second film-coating roller, forming a film-coating channel between the first and second film-coating rollers, so that the target diaphragm 22, the first target electrode 21, and / or the second target electrode 23 passing through the film-coating channel are brought together. The film-coating device 17 can be used to control the width of the film-coating channel to increase or decrease. Optionally, the controller can control the width of the film-coating channel to increase before the first electrode insertion device can insert the first target electrode 21 into one side of the target diaphragm 22, and control the width of the film-coating channel to decrease when the electrode head of the first target electrode 21 reaches the image acquisition area, i.e., before the camera 14 acquires the first target image. Optionally, the controller can control the width of the film-coating channel to increase before the second electrode insertion device can insert the second target electrode 23 into the other side of the target diaphragm 22, and control the width of the film-coating channel to decrease when the electrode head of the second target electrode 23 reaches the image acquisition area, i.e., before the camera 14 acquires the second target image.

[0049] By implementing this method, increasing the channel width of the film-coating channel before inserting the electrode can prevent excessive resistance during electrode insertion, which could lead to electrode deformation. This reduces the difficulty of electrode insertion and improves the yield rate of cell production. Reducing the channel width of the film-coating channel before the camera 14 captures images allows for image analysis to determine the impact of the reduced channel width on the electrode position, further improving the accuracy of electrode alignment.

[0050] As shown in Figure 2, Figure 2 is a schematic flowchart of an electrode correction method disclosed in an embodiment of this disclosure. This electrode correction method can be applied to the winding system in the above embodiment, and the electrode correction method may include the following steps:

[0051] Step 210: The first electrode insertion device inserts the first target electrode 21 into one side of the target diaphragm 22, and causes the electrode head of the first target electrode 21 to be transmitted to the image acquisition area corresponding to the camera 14.

[0052] The first electrode insertion device can communicate with the controller, such as through wired or wireless connection. The controller can send working instructions to the first electrode insertion device, which can then perform the insertion work according to the instructions, inserting the first target electrode 21 into one side of the target diaphragm 22. When the insertion distance reaches a preset distance, the electrode head of the first target electrode 21 is transmitted to the image acquisition area corresponding to the camera 14, and the first electrode insertion device can stop the insertion work.

[0053] Optionally, the first electrode insertion device can also be connected to the camera 14. The camera 14 can detect in real time whether the electrode head of the first target electrode 21 has reached the image acquisition area, and when the electrode head of the first target electrode 21 reaches the image acquisition area, it sends an arrival signal to the first electrode insertion device. The first electrode insertion device can stop the insertion work according to the arrival signal.

[0054] As an optional implementation, before the first electrode insertion device inserts the first target electrode 21 into the side of the target diaphragm 22, the controller can send a self-test command to the first photoelectric sensor 13 and the camera 14. The first photoelectric sensor 13 and the camera 14 can perform self-tests according to the self-test command to ensure that the first photoelectric sensor 13 and the camera 14 can work normally during insertion, and avoid material loss caused by device malfunction.

[0055] Step 220: During the insertion of the first target electrode 21, the first photoelectric sensor 13 detects the first photoelectric data of the first target electrode 21.

[0056] During the insertion of the first target electrode 21, the first photoelectric sensor 13 can detect the first photoelectric data of the first target electrode 21 at a preset frequency. It should be understood that the first photoelectric sensor 13 detects not only the electrode head of the first target electrode 21, but also the entire electrode area of ​​the first target electrode 21 passing through the first photoelectric sensor 13. Optionally, the first photoelectric sensor 13 can begin detecting the first target electrode 21 upon receiving a detection command from the controller, or it can begin detecting the first target electrode 21 upon receiving a start insertion signal from the first electrode insertion device; there is no limitation on this. The first photoelectric sensor 13 can communicate with the controller, and can send the detected first photoelectric data to the controller.

[0057] Step 230: The controller determines the first offset information based on the first photoelectric data, and controls the first correction device 12 to correct the first target electrode 21 based on the first offset information.

[0058] The controller can receive the first photoelectric data sent by the first photoelectric sensor 13, determine the first offset information based on the first photoelectric data, and control the first correction device 12 to correct the first target electrode 21 based on the first offset information. The correction process is performed in real time during the insertion of the first target electrode 21, and the first correction device 12 is positioned in front of the first photoelectric sensor 13 along the insertion direction of the first target electrode 21. The correction effect can be reflected in the first photoelectric data detected by the first photoelectric sensor 13 in real time.

[0059] In one embodiment, the controller determines first offset information based on first photoelectric data, and controls the first correction device 12 to perform at least one correction on the first target electrode 21 according to the target displacement. The target displacement can be preset based on the electrode material of the first target electrode 21. This avoids excessive correction amplitude when the first correction device 12 corrects the first target electrode 21 with a large offset, which could cause the first target electrode 21 to break. By dividing the correction into multiple steps, the amplitude of each correction action is fixed, reducing the risk of damage to the first target electrode 21 and improving the yield rate of battery cell production.

[0060] Step 240: When the electrode head of the first target electrode 21 reaches the image acquisition area, the camera 14 acquires the first target image.

[0061] Optionally, the camera 14 can detect when the electrode head of the first target electrode 21 reaches the image acquisition area, and acquire the first target image when it determines that the electrode head of the first target electrode 21 has stopped moving. As an optional implementation, the winding system may also include an electrode auxiliary device. When the electrode head of the first target electrode 21 reaches the image acquisition area, before the camera 14 acquires the first target image, the controller can control the electrode auxiliary device to bring the first target electrode 21 close to the target diaphragm 22, so that there is a clear contrast between the electrode head of the first target electrode 21 and the target diaphragm 22 in the first target image, further reducing the difficulty of image processing and improving the accuracy of electrode correction.

[0062] Step 250: The controller identifies the electrode head and target diaphragm 22 contained in the first target image to obtain second offset information, and controls the first correction device 12 to perform secondary correction on the first target electrode 21 according to the second offset information.

[0063] It is important to understand that after passing the first photoelectric sensor 13, the electrode head of the first target electrode 21 needs to move a certain distance to reach the image acquisition area. This image acquisition area is not only used for image acquisition but also serves as the starting point for winding the first target electrode 21. Winding of the first target electrode 21 cannot proceed if the electrode head of the first target electrode 21 has not reached the image acquisition area. This distance traveled by the electrode head of the first target electrode 21 will cause it to shift again, resulting in a defective battery cell.

[0064] Therefore, the controller can identify the electrode head and target diaphragm 22 contained in the first target image to obtain second offset information, and control the first correction device 12 to perform secondary correction on the first target electrode 21 based on the second offset information. Since the offset represented by the second offset information is small after the first correction, there is no need to worry about the first target electrode 21 being torn due to excessive correction amplitude; therefore, the secondary correction process does not need to be divided into multiple segments. Optionally, after the secondary correction is completed, the winding device 11 can rotate to wind the pre-clamped target diaphragm 22. Under the influence of friction, the first target electrode 21 can also be wound onto the winding device 11, thereby winding both the target diaphragm 22 and the first target electrode 21. The methods of reducing the channel width of the film-coating device and bringing the first target electrode 21 close to the target diaphragm 22 by the electrode auxiliary device can also increase the friction. Alternatively, instead of reducing the width of the film-coating channel, a rolling feed roller can be set in the winding system. The rolling feed roller generates power to drive the first target electrode 21 to the winding device 11. Then, the target diaphragm 22 and the first target electrode 21 are wound by the rotation of the winding device 11.

[0065] In this embodiment, during the insertion of the first target electrode 21, the controller can control the first correction device to perform a first correction on the first target electrode 21 based on the first photoelectric data detected by the first photoelectric sensor 13. When the electrode head of the first target electrode 21 reaches the image acquisition area, the controller can control the first correction device to perform a second correction on the first target electrode 21 based on the acquired first target image. This solves the problem that the electrode head of the first target electrode 21 shifts again after passing the first photoelectric sensor 13. Moreover, multiple correction processes can improve the accuracy of electrode correction. The corrected first target electrode 21 can be properly covered by the target separator 22, reducing the probability of abnormal covering and thus improving the yield of battery cell production.

[0066] As shown in Figure 3, which is a flowchart illustrating another electrode correction method disclosed in this embodiment, this electrode correction method can be applied to the winding system in the above embodiments. The electrode correction method may include the following steps:

[0067] Step 310: The second electrode insertion device inserts the second target electrode 23 into the other side of the target diaphragm 22, and causes the electrode head of the second target electrode 23 to be transmitted to the image acquisition area.

[0068] Step 320: During the insertion of the second target electrode 23, the second photoelectric sensor 16 detects the second photoelectric data corresponding to the second target electrode 23.

[0069] Step 330: The controller determines the third offset data based on the second photoelectric data, and controls the second correction device 15 to correct the second target electrode 23 based on the third offset data.

[0070] Step 340: When the electrode head of the second target electrode 23 reaches the image acquisition area, the camera 14 acquires the image of the second target.

[0071] Step 350: The controller identifies the electrode head and target diaphragm 22 contained in the second target image to obtain fourth offset data, and controls the second correction device 15 to perform secondary correction on the second target electrode 23 according to the fourth offset data.

[0072] The correction method for the second target electrode 23 in steps 310-350 can refer to the correction method for the first target electrode 21 in the above embodiments, and will not be repeated here. It should be understood that steps 310-350 can be performed after step 250 or before step 210, and there is no limitation on this. However, for ease of explanation, this embodiment of the disclosure performs the correction of the second target electrode 23 after the correction of the first target electrode 21.

[0073] In one embodiment, to bring the electrode head of the second target electrode 23 closer to the target diaphragm 22 in the target image, before performing step 340, when the electrode head of the second target electrode 23 reaches the image acquisition area, the controller can control the winding device 11 to rotate to wind the target diaphragm 22 and the first target electrode 21. This friction causes the second target electrode 23 to move closer to the target diaphragm 22. If the rotation angle of the winding device 11 reaches a preset angle, the controller can control the camera 14 to acquire the second target image. The rotation angle of the winding device 11 refers to the angle at which the winding device 11 rotates when the electrode head of the second target electrode 23 reaches the image acquisition area. Specifically, as shown in Figure 1-B, the second target electrode 23 is close to the target diaphragm 22. Implementing this embodiment further improves the clarity of the second target electrode 23 and the target diaphragm 22 in the second target image and improves the accuracy of electrode correction.

[0074] In this embodiment of the disclosure, the winding system also includes a set of devices for correcting the deviation of the second target electrode 23, including a second electrode insertion device, a second deviation correction device 15, a second photoelectric sensor 16, and a camera 14, which improves the completeness of the winding system and thus improves the yield of battery cell production.

[0075] As shown in Figure 4, Figure 4 is a modular schematic diagram of an electrode correction device disclosed in this embodiment. This electrode correction device 400 can be applied to the controller in the above embodiment. The electrode correction device 400 may include an electrode insertion control module 410, a photoelectric detection control module 420, a primary correction control module 430, an image acquisition control module 440, and a secondary correction control module 450, wherein:

[0076] The electrode insertion control module 410 is used to control the first electrode insertion device to insert the first target electrode 21 into one side of the target diaphragm 22, and to transmit the electrode head of the first target electrode 21 to the image acquisition area corresponding to the camera 14; the first target electrode 21 includes a negative electrode or a positive electrode; the target diaphragm 22 is connected to the winding device 11;

[0077] The photoelectric detection control module 420 is used to control the first photoelectric sensor 13 to detect the first photoelectric data corresponding to the first target electrode 21 during the insertion process of the first target electrode 21.

[0078] The primary correction control module 430 is used to determine the first offset information based on the first photoelectric data, and to control the first correction device 12 to correct the first target electrode 21 based on the first offset information.

[0079] The image acquisition control module 440 is used to control the camera 14 to acquire a first target image when the electrode head of the first target electrode 21 reaches the image acquisition area. The first target image includes the electrode head of the first target electrode 21 and the target diaphragm 22.

[0080] The secondary correction control module 450 is used to identify the electrode head and target diaphragm 22 contained in the first target image to obtain second offset information, and control the first correction device 12 to perform secondary correction on the first target electrode 21 according to the second offset information.

[0081] In one embodiment, the primary correction control module 430 is further configured to determine the first offset information based on the first photoelectric data; and based on the first offset information, control the first correction device 12 to perform at least one correction on the first target electrode 21 according to the target displacement.

[0082] In one embodiment, the electrode insertion control module 410 is further configured to control the second electrode insertion device to insert the second target electrode 23 into the other side of the target diaphragm 22, and to transmit the electrode head of the second target electrode 23 to the image acquisition area; the second target electrode 23 and the first target electrode 21 are different types of electrodes; the photoelectric detection control module 420 is further configured to control the second photoelectric sensor 16 to detect the second photoelectric data corresponding to the second target electrode 23 during the insertion process of the second target electrode 23; the primary correction control module 430 is further configured to determine the third offset data based on the second photoelectric data, and based on... The third offset data controls the second correction device 15 to correct the second target electrode 23; the image acquisition control module 440 is also used to control the camera 14 to acquire the second target image when the electrode head of the second target electrode 23 reaches the image acquisition area. The second target image includes the electrode head of the second target electrode 23 and the target diaphragm 22; the secondary correction control module 450 is also used to identify the electrode head and the target diaphragm 22 included in the second target image to obtain the fourth offset data, and control the second correction device 15 to perform secondary correction on the second target electrode 23 according to the fourth offset data.

[0083] In one embodiment, the electrode correction device 400 may further include an electrode winding control module, which is used to control the winding device 11 to rotate to wind the target diaphragm 22 and the first target electrode 21 when the electrode head of the second target electrode 23 reaches the image acquisition area; the image acquisition control module 440 is also used to control the camera 14 to acquire the second target image if the rotation angle of the winding device 11 reaches a preset angle.

[0084] In one embodiment, the electrode correction device 400 may further include an electrode auxiliary control module, which, when the electrode head of the first target electrode 21 reaches the image acquisition area, controls the electrode auxiliary device to bring the first target electrode 21 close to the target diaphragm 22.

[0085] In one embodiment, the electrode insertion control module 410 is further configured to control the first electrode insertion device to insert the first target electrode 21 into one side of the target diaphragm 22, and to make the electrode head of the first target electrode 21 pass through the merging channel of the merging device and then be transmitted to the image acquisition area corresponding to the camera 14; the merging channel of the merging device is used to make the first target electrode 21 and the target diaphragm 22 come together.

[0086] In one embodiment, the electrode correction device 400 may further include a film-coating channel control module for increasing the channel width of the film-coating channel controlled by the film-coating device; the film-coating channel control module is also used to decrease the channel width of the film-coating channel controlled by the film-coating device; and the electrode winding control module is also used to control the winding device 11 to start rotating to wind the target diaphragm 22 and the first target electrode 21.

[0087] In this embodiment, during the insertion of the first target electrode 21, the controller can control the first correction device to perform a first correction on the first target electrode 21 based on the first photoelectric data detected by the first photoelectric sensor 13. When the electrode head of the first target electrode 21 reaches the image acquisition area, the controller can control the first correction device to perform a second correction on the first target electrode 21 based on the acquired first target image. This solves the problem that the electrode head of the first target electrode 21 shifts again after passing the first photoelectric sensor 13. Moreover, multiple correction processes can improve the accuracy of electrode correction. The corrected first target electrode 21 can be properly covered by the target separator 22, reducing the probability of abnormal covering and thus improving the yield of battery cell production.

[0088] As shown in Figure 5, in one embodiment, a controller is provided, which may include:

[0089] Memory 510 storing executable program code;

[0090] Processor 520 coupled to memory 510;

[0091] The processor 520 can call the executable program code stored in the memory 510 to implement the electrode correction method provided in the above embodiments.

[0092] The memory 510 may include random access memory (RAM) or read-only memory (ROM). The memory 510 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 510 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch functionality, sound playback functionality, image playback functionality, etc.), and instructions for implementing the various method embodiments described above. The data storage area may also store data created by the controller during use.

[0093] Processor 520 may include one or more processing cores. Processor 520 connects to various parts of the controller using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory 510, and by calling data stored in memory 510. Optionally, processor 520 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). Processor 520 may integrate one or more of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into processor 520 and may be implemented separately using a communication chip.

[0094] Understandably, the controller may include more or fewer structural elements than those shown in the block diagram above, such as a power module, physical buttons, a WiFi (Wireless Fidelity) module, a speaker, a Bluetooth module, sensors, etc., and may not be limited thereto.

[0095] This disclosure provides a computer-readable storage medium storing a computer program that causes a computer to perform the methods described in the above embodiments.

[0096] Furthermore, this disclosure further discloses a computer program product that, when run on a computer, enables the computer to perform all or part of the steps in any of the electrode correction methods described in the above embodiments.

[0097] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-Erasable Programmable Read-Only Memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0098] The above provides a detailed description of an electrode correction method and winding system disclosed in the embodiments of this disclosure. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The description of the above embodiments is only for the purpose of helping to understand the method and its core ideas. 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 ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A method for correcting electrode polarization, characterized in that, The method is applied to a winding system, which includes a winding device (11), a first electrode insertion device, a first correction device (12), a first photoelectric sensor (13), a camera (14), and a controller; the method includes: The first electrode insertion device inserts the first target electrode (21) into one side of the target diaphragm (22) and causes the electrode head of the first target electrode (21) to be transmitted to the image acquisition area corresponding to the camera (14); the first target electrode (21) includes a negative electrode or a positive electrode; During the insertion of the first target electrode (21), the first photoelectric sensor (13) detects the first photoelectric data corresponding to the first target electrode (21); The controller determines the first offset information based on the first photoelectric data, and controls the first correction device (12) to correct the first target electrode (21) based on the first offset information; When the electrode head of the first target electrode (21) reaches the image acquisition area, the camera (14) acquires a first target image, which includes the electrode head of the first target electrode (21) and the target diaphragm (22). The controller identifies the electrode head and target diaphragm (22) contained in the first target image to obtain second offset information, and controls the first correction device (12) to perform secondary correction on the first target electrode (21) according to the second offset information.

2. The method according to claim 1, characterized in that, The controller determines the first offset information based on the first photoelectric data, and controls the first correction device (12) to correct the first target electrode (21) based on the first offset information, including: The controller determines the first offset information based on the first photoelectric data; The controller controls the first correction device (12) to perform at least one correction on the first target electrode (21) according to the target displacement based on the first offset information.

3. The method according to claim 1 or 2, characterized in that, The winding system further includes a second electrode insertion device, a second correction device (15), and a second photoelectric sensor (16); the method further includes: The second electrode insertion device inserts the second target electrode (23) into the other side of the target diaphragm (22) and causes the electrode head of the second target electrode (23) to be conveyed to the image acquisition area; the second target electrode (23) and the first target electrode (21) are different types of electrodes; During the insertion of the second target electrode (23), the second photoelectric sensor (16) detects the second photoelectric data corresponding to the second target electrode (23); The controller determines the third offset data based on the second photoelectric data, and controls the second correction device (15) to correct the second target electrode (23) based on the third offset data; When the electrode head of the second target electrode (23) reaches the image acquisition area, the camera (14) acquires a second target image, which includes the electrode head of the second target electrode (23) and the target diaphragm (22). The controller identifies the electrode head and the target diaphragm (22) contained in the second target image to obtain fourth offset data, and controls the second correction device (15) to perform secondary correction on the second target electrode (23) according to the fourth offset data.

4. The method according to claim 3, characterized in that, Before the camera (14) acquires the second target image, the method further includes: When the electrode head of the second target electrode (23) reaches the image acquisition area, the controller controls the winding device (11) to rotate to wind the target diaphragm (22) and the first target electrode (21); The camera (14) captures images of the second target, including: If the rotation angle of the winding device (11) reaches a preset angle, the controller controls the camera (14) to capture the second target image.

5. The method according to any one of claims 1-4, characterized in that, The winding system also includes an electrode auxiliary device; Before the camera (14) acquires the first target image, the method further includes: When the electrode head of the first target electrode (21) reaches the image acquisition area, the controller controls the electrode auxiliary device to bring the first target electrode (21) close to the target diaphragm (22).

6. The method according to any one of claims 1-5, characterized in that, The winding system also includes a film-coating device; The first electrode insertion device inserts the first target electrode (21) into one side of the target diaphragm (22), and transmits the electrode head of the first target electrode (21) to the image acquisition area corresponding to the camera (14), including: The first electrode insertion device inserts the first target electrode (21) into one side of the target diaphragm (22), and the electrode head of the first target electrode (21) passes through the merging channel of the merging device and is then transmitted to the image acquisition area corresponding to the camera (14); the merging channel of the merging device is used to bring the first target electrode (21) and the target diaphragm (22) together.

7. The method according to claim 6, characterized in that, Before the first electrode insertion device inserts the first target electrode (21) onto one side of the target diaphragm (22), the method further includes: The film-coating device controls the increase of the width of the film-coating channel; Before the camera (14) acquires the first target image, the method further includes: The film-coating device controls the reduction of the width of the film-coating channel; After the method controls the first correction device (12) to perform secondary correction on the first target electrode (21) based on the first image offset data, the method further includes: The winding device (11) begins to rotate to wind the target diaphragm (22) and the first target electrode (21).

8. A winding system, characterized in that, include: A winding device (11) is connected to the target diaphragm (22); A first electrode insertion device is used to insert a first target electrode (21) into one side of the target diaphragm (22); the first target electrode (21) includes a negative electrode or a positive electrode; Along the insertion direction of the first target electrode (21), a first correction device (12), a first photoelectric sensor (13), and an image acquisition area corresponding to a camera (14) are sequentially arranged; The first photoelectric sensor (13) is used to detect first photoelectric data during the insertion of the first target electrode (21), and the first photoelectric data is used to instruct the first correction device (12) to correct the first target electrode (21). The camera (14) is used to capture a first target image when the electrode head of the first target electrode (21) reaches the image acquisition area corresponding to the camera (14); The first target image is used to instruct the first correction device (12) to perform secondary correction on the first target electrode (21).

9. The winding system according to claim 8, characterized in that, The winding system also includes a second electrode insertion device, a second correction device (15), and a second photoelectric sensor (16); The second electrode insertion device is used to insert the second target electrode (23) into the other side of the target diaphragm (22); the second target electrode (23) and the first target electrode (21) are different types of electrodes; Along the insertion direction of the second target electrode (23), the second correction device (15), the second photoelectric sensor (16), and the image acquisition area corresponding to the camera (14) are sequentially arranged; The second photoelectric sensor (16) is used to detect second photoelectric data during the insertion of the second target electrode (23), and the second photoelectric data is used to determine the third offset information of the second target electrode (23); The camera (14) is also used to acquire a second target image when the electrode head of the second target electrode (23) reaches the image acquisition area; the second target image is used to determine the fourth offset information of the electrode head of the second target electrode (23) relative to the target diaphragm (22); The second correction device (15) is used to correct the second target electrode (23) according to the third offset information during the insertion of the second target electrode (23), and to perform secondary correction on the second target electrode (23) according to the fourth offset information when the electrode head of the second target electrode (23) reaches the image acquisition area.

10. The winding system according to claim 9, characterized in that, The winding system also includes an electrode auxiliary device for bringing the first target electrode (21) or the second target electrode (23) with its electrode head in the image acquisition area close to the target diaphragm (22).

11. The winding system according to claim 9 or 10, characterized in that, The winding system further includes a film-coating device, which is disposed after the first photoelectric sensor (13) along the insertion direction of the first target electrode (21) and after the second photoelectric sensor (16) along the insertion direction of the second target electrode (23). The film-coating device is used to control the increase or decrease of the width of the film-coating channel.

12. A controller, characterized in that, include: A memory (510) storing executable program code; The processor (520) implements the electrode correction method as described in any one of claims 1-7 when it calls the executable program code.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program for causing a computer to perform the electrode correction method as described in any one of claims 1-7.

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