A method, device, system, electronic device and storage medium for detecting a pole piece

Abstract

The present application relates to a method, device, system, electronic device and storage medium for detecting a pole piece. The method includes: obtaining a first captured image of a first surface of the pole piece located at the pole piece insertion position and a second captured image of a second surface; determining a coating misalignment amount between the first surface and the second surface of the pole piece according to the first captured image and the second captured image; obtaining a third captured image of the first surface of the pole piece located at the pole piece winding-in position; determining a first diaphragm coating value of the first surface of the pole piece according to the third captured image; and determining a second diaphragm coating value of the second surface of the pole piece according to the coating misalignment amount and the first diaphragm coating value. Through the present application, it is possible to detect poor coating caused by the misalignment of the front and back coatings of the pole piece in the previous process, thereby reducing the number of products with poor coating and improving the quality of the coil core.

Description

Technical Field

[0001] This application relates to the field of computer technology, and particularly to a method, device, system, electronic device, and storage medium for pole piece detection. Background Art

[0002] As Figure 1 and Figure 2 shown, a pole piece usually has a base material in the middle, and coatings on both sides. Ideally, the coatings on both sides should be of the same height, that is, the exposed distances on both sides of the tab should be the same. However, in reality, due to reasons such as processing accuracy, it is usually very difficult to achieve exactly the same. In the existing winding visual inspection, it is necessary to detect the wrapping effect of the separator and the pole piece. Due to the core structure, usually only one side can be detected. Then, there may be a situation where a battery cell with good wrapping on one side but poor wrapping on the other side is not detected in time, which will pose a great potential safety hazard. Summary of the Invention

[0003] This application provides a method, device, system, electronic device, and storage medium for pole piece detection to solve the problem in the prior art that only the wrapping effect of one side of the pole piece can be detected. The technical solution of this application is as follows:

[0004] According to the first aspect of the embodiments of this application, a method for pole piece detection is provided. The method includes: obtaining a first captured image of the first surface of the pole piece located at the pole piece insertion position, and a second captured image of the second surface; determining the coating misalignment amount between the first surface and the second surface of the pole piece according to the first captured image and the second captured image; obtaining a third captured image of the first surface of the pole piece located at the pole piece winding position; determining a first separator wrapping value of the first surface of the pole piece according to the third captured image; and determining a second separator wrapping value of the second surface of the pole piece according to the coating misalignment amount and the first separator wrapping value.

[0005] Further, the determining the coating misalignment amount between the first surface and the second surface of the pole piece according to the first captured image and the second captured image includes: determining a first distance between the coating edge of the first surface of the pole piece and the same-side edge of the pole piece according to the first captured image; determining a second distance between the coating edge of the second surface of the pole piece and the same-side edge of the pole piece according to the second captured image; and determining the coating misalignment amount between the first surface and the second surface of the pole piece according to the first distance and the second distance.

[0006] Further, the obtaining of the third captured image of the first surface of the pole piece at the pole piece winding-in position includes: obtaining the distance between the pole piece insertion position and the pole piece winding-in position; when the pole piece runs this distance in the direction from the pole piece insertion position to the pole piece winding-in position, determining that the pole piece is at the pole piece winding-in position; capturing the first surface of the pole piece at the pole piece winding-in position to obtain the third captured image.

[0007] Further, the obtaining of the third captured image of the first surface of the pole piece at the pole piece winding-in position includes: presetting the time required for the pole piece to run from the pole piece insertion position to the pole piece winding-in position; when the pole piece runs this time in the direction from the pole piece insertion position to the pole piece winding-in position, determining that the pole piece is at the pole piece winding-in position; capturing the first surface of the pole piece at the pole piece winding-in position to obtain the third captured image.

[0008] Further, after the step of determining the second diaphragm covering value of the second surface of the pole piece according to the coating misalignment amount and the first diaphragm covering value, the method further includes: determining a rectification parameter for the next moment according to the first diaphragm covering value and the second diaphragm covering value, so as to rectify the unwinding of the pole piece at the next moment according to the rectification parameter.

[0009] According to a second aspect of an embodiment of the present application, there is provided a pole piece detection device, the device includes: an insertion position image acquisition module, configured to acquire a first captured image of the first surface of the pole piece at the pole piece insertion position and a second captured image of the second surface; a coating misalignment amount determination module, configured to determine the coating misalignment amount between the first surface and the second surface of the pole piece according to the first captured image and the second captured image; a winding-in position image acquisition module, configured to acquire a third captured image of the first surface of the pole piece at the pole piece winding-in position; a first diaphragm covering value determination module, configured to determine the first diaphragm covering value of the first surface of the pole piece according to the third captured image; a second diaphragm covering value determination module, configured to determine the second diaphragm covering value of the second surface of the pole piece according to the coating misalignment amount and the first diaphragm covering value.

[0010] According to a third aspect of an embodiment of the present application, there is provided a pole piece detection system, the system includes: a first camera, configured to capture the first surface of the pole piece at the pole piece insertion position; a second camera, configured to capture the second surface of the pole piece at the pole piece insertion position; a third camera, configured to capture the first surface of the pole piece at the pole piece winding-in position; a controller, electrically connected to the first camera, the second camera and the third camera respectively, and configured to execute the method according to any one of the above first aspects.

[0011] Further, the third camera is a CCD camera.

[0012] According to a fourth aspect of the embodiments of the present application, there is provided an electronic device, including: a processor; a memory for storing executable instructions of the processor; wherein, the processor is configured to execute the instructions to implement the method according to any one of the above first aspects.

[0013] According to a fifth aspect of the embodiments of the present application, there is provided a computer-readable storage medium, when the instructions in the storage medium are executed by a processor of an electronic device, enabling the electronic device to execute any one of the methods in the first aspect of the embodiments of the present application.

[0014] According to a sixth aspect of the embodiments of the present application, there is provided a computer program product containing instructions, when it runs on a computer, enabling the computer to execute any one of the methods in the first aspect of the embodiments of the present application.

[0015] The technical solutions provided by the embodiments of the present application at least bring the following beneficial effects:

[0016] In the embodiments of the present application, a first captured image of the first surface of the pole piece located at the pole piece insertion position and a second captured image of the second surface are obtained. According to the first captured image and the second captured image, the coating misalignment amount between the first surface and the second surface of the pole piece is determined. A third captured image of the first surface of the pole piece located at the pole piece winding position is obtained. According to the third captured image, a first separator coating value of the first surface of the pole piece is determined. According to the coating misalignment amount and the first separator coating value, a second separator coating value of the second surface of the pole piece is determined. In this way, it is possible to detect the poor coating caused by the misalignment of the front and back coatings of the pole piece in the previous process, thereby reducing the products with poor coating and improving the quality of the winding core.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application, and do not constitute an improper limitation to the present application.

[0019] Figure 1 is a schematic structural diagram of a pole piece and a pole ear in the prior art;

[0020] Figure 2 is a cross-sectional view of a pole piece in the prior art;

[0021] Figure 3It is a schematic flow chart of a pole piece detection method provided by an embodiment of the present application;

[0022] Figure 4 It is a schematic structural diagram of a pole piece detection system provided by an embodiment of the present application;

[0023] Figure 5 It is a schematic flow chart of another pole piece detection method provided by an embodiment of the present application;

[0024] Figure 6 It is a schematic structural diagram of a pole piece detection device provided by an embodiment of the present application;

[0025] Figure 7 It is a block diagram of an electronic device for a pole piece detection method provided by an embodiment of the present application. Detailed implementation manners

[0026] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0028] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties.

[0029] In the existing winding visual inspection, it is necessary to detect the wrapping effect of the diaphragm and the pole piece. Due to the winding core structure, usually only one side can be detected. Then, there may be a situation where a battery cell with good wrapping on one side but poor wrapping on the other side is not detected in time, which will bring great potential safety hazards. Based on this, an embodiment of the present application provides a pole piece detection method, as Figure 3 shown, the method includes the following steps:

[0030] S301: Obtain a first captured image of the first surface of the pole piece located at the pole piece insertion position, and a second captured image of the second surface;

[0031] In the embodiment of the present application, asFigure 4 As shown, cameras can be respectively arranged on both sides of the electrode sheet at the electrode sheet insertion position, so as to respectively photograph the first surface (i.e., surface B) and the second surface (i.e., surface A) of the electrode sheet, and obtain a first photographed image of the first surface of the electrode sheet and a second photographed image of the second surface of the electrode sheet.

[0032] In practical applications, the electrode sheet detection method described in the embodiments of the present application can be used only for the positive electrode sheet or only for the negative electrode sheet, or can be used for the positive electrode sheet and the negative electrode sheet respectively at the same time.

[0033] S303: Determine the coating misalignment amount between the first surface and the second surface of the electrode sheet according to the first photographed image and the second photographed image;

[0034] In the embodiments of the present application, the determining of the coating misalignment amount between the first surface and the second surface of the electrode sheet according to the first photographed image and the second photographed image (i.e., step S303) may include: determining a first distance between the coating edge of the first surface of the electrode sheet and the same-side edge of the electrode sheet according to the first photographed image; determining a second distance between the coating edge of the second surface of the electrode sheet and the same-side edge of the electrode sheet according to the second photographed image; and determining the coating misalignment amount between the first surface and the second surface of the electrode sheet according to the first distance and the second distance.

[0035] In the embodiments of the present application, the coating edges of the first surface and the second surface of the electrode sheet may refer to the coating edges in the width direction of the electrode sheet, that is, the coating edges perpendicular to its running direction.

[0036] Specifically, as Figure 2 shown, the first distance between the coating edge of the first surface of the electrode sheet and one side edge of the electrode sheet may specifically be the distance between the upper edge of the left coating and the upper edge of the substrate, and the second distance between the coating edge of the second surface of the electrode sheet and the same side edge of the electrode sheet may be the distance between the upper edge of the right coating and the upper edge of the substrate. Furthermore, through the first distance and the second distance, the coating misalignment amount between the upper edge of the left coating and the upper edge of the right coating can be determined.

[0037] S305: Obtain a third photographed image of the first surface of the electrode sheet at the electrode sheet incoming winding position;

[0038] In the embodiments of the present application, as Figure 4As shown, a CCD (charge coupled device) camera can be provided on one side of the electrode sheet at the electrode sheet winding position, so that the first surface (i.e., surface B) of the electrode sheet at the electrode sheet winding position can be photographed to obtain a third photographed image of the first surface of the electrode sheet.

[0039] In some embodiments, obtaining the third photographed image of the first surface of the electrode sheet at the electrode sheet winding position may include: obtaining the distance between the electrode sheet insertion position and the electrode sheet winding position; when the electrode sheet runs the distance in the direction from the electrode sheet insertion position to the electrode sheet winding position, determining that the electrode sheet is at the electrode sheet winding position; photographing the first surface of the electrode sheet at the electrode sheet winding position to obtain the third photographed image.

[0040] Specifically, an encoder can be used for length measurement. When it is determined that the electrode sheet runs from the electrode sheet insertion position to the electrode sheet winding position, a third camera is used to photograph the first surface (such as surface B in the appendix) of the electrode sheet at the electrode sheet winding position to obtain a third photographed image. Figure 4 to obtain a third photographed image.

[0041] In other embodiments, obtaining the third photographed image of the first surface of the electrode sheet at the electrode sheet winding position may further include: presetting the time required for the electrode sheet to run from the electrode sheet insertion position to the electrode sheet winding position; when the electrode sheet runs the time in the direction from the electrode sheet insertion position to the electrode sheet winding position, determining that the electrode sheet is at the electrode sheet winding position; photographing the first surface of the electrode sheet at the electrode sheet winding position to obtain the third photographed image.

[0042] Specifically, the running speed of the electrode sheet can be fixed, and the time required for the electrode sheet to run from the electrode sheet insertion position to the electrode sheet winding position can be measured in advance at the fixed running speed. Then, when the electrode sheet runs the time in the direction from the electrode sheet insertion position to the electrode sheet winding position at the fixed running speed, the first surface of the electrode sheet at the electrode sheet winding position is photographed to obtain the third photographed image.

[0043] S307: Determine a first diaphragm coating value of the first surface of the electrode sheet according to the third photographed image;

[0044] In the embodiments of the present application, the first diaphragm coating value can be used to characterize the coating condition of the diaphragm on the first surface of the electrode sheet at the electrode sheet winding position.

[0045] In the embodiments of the present application, such as Figure 4As shown, the diaphragm coating value of the lower diaphragm on the B surface of the positive electrode sheet can be determined according to the third captured image, and the diaphragm coating value of the upper diaphragm on the B surface of the negative electrode sheet can also be determined according to the third captured image.

[0046] S309: Determine the second diaphragm coating value of the second surface of the electrode sheet according to the coating misalignment amount and the first diaphragm coating value.

[0047] In the embodiment of the present application, the second diaphragm coating value can be used to characterize the coating condition of the diaphragm on the second surface of the electrode sheet at the electrode sheet feeding position.

[0048] In the embodiment of the present application, according to the coating misalignment amount and the first diaphragm coating value of the first surface of the electrode sheet, the second diaphragm coating value of the second surface of the electrode sheet can be determined, that is, as Figure 4 shown, the diaphragm coating value of the A surface of the electrode sheet at the electrode sheet feeding position can be deduced.

[0049] In a specific embodiment, as Figure 5 shown, the electrode sheet detection method may include the following steps:

[0050] Simultaneously perform unrolling and deviation correction operations on the positive electrode sheet and the negative electrode sheet to insert the positive electrode sheet and the negative electrode sheet respectively at the electrode sheet insertion position;

[0051] Use a first camera on one side of the positive electrode sheet at the electrode sheet insertion position to capture the first surface (such as the B surface in the appendix Figure 4 ), and obtain the first captured image of the first surface of the positive electrode sheet; at the same time, use a second camera on the other side of the positive electrode sheet at the electrode sheet insertion position to capture the second surface (such as the A surface in the appendix Figure 4 ), and obtain the second captured image of the second surface of the positive electrode sheet; similarly, the same operation can be performed on the negative electrode sheet at the electrode sheet insertion position;

[0052] According to the first captured image and the second captured image, determine the coating misalignment amount between the first surface and the second surface of the positive electrode sheet; similarly, perform the same operation on the negative electrode sheet to determine the coating misalignment amount between the first surface and the second surface of the negative electrode sheet;

[0053] Then, the positive electrode sheet and the negative electrode sheet are wound under the drive of the winding needle. At this time, an encoder can be used to measure the length and monitor the running position of the positive electrode sheet. When it is determined that the positive electrode sheet runs from the electrode sheet insertion position to the electrode sheet feeding position, use a third camera to capture the first surface of the positive electrode sheet at the electrode sheet feeding position (such as in the appendix Figure 4Take a picture of the B side in it) to obtain a third captured image, and determine the first separator coating value of the first surface of the positive electrode sheet according to the third captured image; similarly, the same operation can be performed on the negative electrode sheet;

[0054] Determine the second separator coating value of the second surface of the positive electrode sheet according to the coating misalignment amount and the first separator coating value between the first surface and the second surface of the positive electrode sheet; similarly, the same operation can be performed on the negative electrode sheet;

[0055] Finally, after winding the current battery cell, cut the ends of the positive electrode sheet and the negative electrode sheet.

[0056] In practical applications, the electrode sheet detection method of the embodiments of the present application can be applied to processes such as full pole ears and multi-pole ears.

[0057] In the embodiments of the present application, by setting visual detection on both sides of the electrode sheet at the upstream position of the core, the coating situation of the side that cannot be captured at the core can be deduced, thereby ensuring the quality of the core.

[0058] In the embodiments of the present application, after detecting the coating situations on both sides of the electrode sheet, it can also be used to adjust the subsequent coating process of the electrode sheet, thereby improving the quality of the core. That is, after the step of determining the second separator coating value of the second surface of the electrode sheet according to the coating misalignment amount and the first separator coating value, the electrode sheet detection method may further include:

[0059] Determine the deviation correction parameter for the next moment according to the first separator coating value and the second separator coating value, so as to correct the unwinding of the electrode sheet at the next moment according to the deviation correction parameter.

[0060] The embodiments of the present application also provide an electrode sheet detection device, as Figure 6 shown, the device may include:

[0061] An insertion position image acquisition module 610, configured to acquire a first captured image of the first surface of the electrode sheet located at the electrode sheet insertion position and a second captured image of the second surface;

[0062] A coating misalignment amount determination module 620, configured to determine the coating misalignment amount between the first surface and the second surface of the electrode sheet according to the first captured image and the second captured image;

[0063] A winding position image acquisition module 630, configured to acquire a third captured image of the first surface of the electrode sheet located at the electrode sheet winding position;

[0064] A first separator coating value determination module 640, configured to determine the first separator coating value of the first surface of the electrode sheet according to the third captured image;

[0065] A second separator coating value determination module 650, configured to determine a second separator coating value of a second surface of the electrode sheet according to the coating misalignment amount and the first separator coating value.

[0066] In some embodiments, the coating misalignment amount determination module may include:

[0067] A first distance determination unit, configured to determine a first distance between a coating edge of a first surface of the electrode sheet and the same-side edge of the electrode sheet according to the first captured image;

[0068] A second distance determination unit, configured to determine a second distance between a coating edge of a second surface of the electrode sheet and the same-side edge of the electrode sheet according to the second captured image;

[0069] A coating misalignment amount determination unit, configured to determine a coating misalignment amount between a first surface and a second surface of the electrode sheet according to the first distance and the second distance.

[0070] In some embodiments, the incoming roll position image acquisition module may include:

[0071] A distance acquisition unit, configured to acquire a distance between the electrode sheet insertion position and the electrode sheet incoming roll position;

[0072] A first electrode sheet position determination unit, configured to determine that the electrode sheet is located at the electrode sheet incoming roll position when the electrode sheet runs the distance in a direction from the electrode sheet insertion position to the electrode sheet incoming roll position;

[0073] An incoming roll position image acquisition unit, configured to capture a first surface of the electrode sheet located at the electrode sheet incoming roll position to obtain the third captured image.

[0074] In some embodiments, the incoming roll position image acquisition module may further include:

[0075] A time determination unit, configured to preset a time required for the electrode sheet to run from the electrode sheet insertion position to the electrode sheet incoming roll position;

[0076] A second electrode sheet position determination unit, configured to determine that the electrode sheet is located at the electrode sheet incoming roll position when the electrode sheet runs the time in a direction from the electrode sheet insertion position to the electrode sheet incoming roll position;

[0077] An incoming roll position image acquisition unit, configured to capture a first surface of the electrode sheet located at the electrode sheet incoming roll position to obtain the third captured image.

[0078] In some embodiments, the electrode sheet detection device may further include:

[0079] The deviation correction parameter determination module is configured to determine the deviation correction parameter for the next moment according to the first diaphragm coating value and the second diaphragm coating value, so as to correct the unwinding of the pole piece at the next moment according to the deviation correction parameter.

[0080] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0081] An embodiment of the present application further provides a pole piece detection system, which may include:

[0082] A first camera for photographing the first surface of the pole piece located at the pole piece insertion position;

[0083] A second camera for photographing the second surface of the pole piece located at the pole piece insertion position;

[0084] A third camera for photographing the first surface of the pole piece located at the pole piece winding-in position;

[0085] A controller, electrically connected to the first camera, the second camera, and the third camera respectively, for executing the pole piece detection method in the above embodiment.

[0086] Specifically, the controller may be the built-in processor of each camera or a PLC (Programmable Logic Controller) industrial control computer.

[0087] In the embodiment of the present application, the third camera may be a CCD camera.

[0088] Regarding the pole piece detection system in the embodiment of the present application, the specific manner of each component device and each execution step has been described in detail in the embodiment of the method, and will not be elaborated here.

[0089] Figure 7 It is a block diagram of an electronic device for the pole piece detection method provided by the embodiment of the present application. The electronic device may be a terminal, and its internal structure diagram may be as Figure 7As shown. The electronic device includes a processor, a memory, a model interface, a display screen, and an input device connected via a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The model interface of the electronic device is used to communicate with an external terminal through model connection. When the computer program is executed by the processor, it realizes the method in the embodiments of the present application. The display screen of the electronic device can be a liquid crystal display screen or an electronic ink display screen. The input device of the electronic device can be a touch layer covered on the display screen, or a button, a trackball, or a touchpad provided on the housing of the electronic device, or an external keyboard, touchpad, or mouse, etc.

[0090] Those skilled in the art can understand that Figure 7 the structure shown in is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the electronic device to which the solution of the present application is applied. The specific electronic device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0091] In an exemplary embodiment, there is also provided an electronic device, including: a processor; a memory for storing executable instructions of the processor; wherein, the processor is configured to execute the instructions to implement the method as in the embodiments of the present application.

[0092] In an exemplary embodiment, there is also provided a computer-readable storage medium. When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device can execute the method in the embodiments of the present application.

[0093] In an exemplary embodiment, there is also provided a computer program product containing instructions. When it runs on a computer, the computer executes the method in the embodiments of the present application.

[0094] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. This computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above various methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0095] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0096] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A method for detecting a pole piece, characterized in that, The method includes: Obtaining a first captured image of the first surface of the electrode tab located at the electrode tab insertion position and a second captured image of the second surface; Determining, according to the first captured image and the second captured image, a coating misalignment amount between the first surface and the second surface of the electrode tab, where the coating misalignment amount is used to characterize the misalignment amount between a first distance between the coating edge of the first surface of the electrode tab and the same-side edge and a second distance between the coating edge of the second surface of the electrode tab and the same-side edge; Obtaining a third captured image of the first surface of the electrode tab located at the electrode tab winding-in position; Determining, according to the third captured image, a first separator wrapping value of the first surface of the electrode tab; Determining, according to the coating misalignment amount and the first separator wrapping value, a second separator wrapping value of the second surface of the electrode tab.

2. The pole piece detection method according to claim 1, characterized in that, The determining, according to the first captured image and the second captured image, the coating misalignment amount between the first surface and the second surface of the electrode tab includes: Determining, according to the first captured image, a first distance between the coating edge of the first surface of the electrode tab and the same-side edge of the electrode tab; Determining, according to the second captured image, a second distance between the coating edge of the second surface of the electrode tab and the same-side edge of the electrode tab; Determining, according to the first distance and the second distance, the coating misalignment amount between the first surface and the second surface of the electrode tab.

3. The method for detecting a pole piece according to claim 1, wherein The obtaining a third captured image of the first surface of the electrode tab located at the electrode tab winding-in position includes: Obtaining the distance between the electrode tab insertion position and the electrode tab winding-in position; When the electrode tab runs this distance in the direction from the electrode tab insertion position to the electrode tab winding-in position, determining that the electrode tab is located at the electrode tab winding-in position; Capturing the first surface of the electrode tab located at the electrode tab winding-in position to obtain the third captured image.

4. The pole piece detection method according to claim 1, characterized in that The obtaining a third captured image of the first surface of the electrode tab located at the electrode tab winding-in position includes: Presetting the time required for the electrode tab to run from the electrode tab insertion position to the electrode tab winding-in position; When the electrode tab runs this time in the direction from the electrode tab insertion position to the electrode tab winding-in position, determining that the electrode tab is located at the electrode tab winding-in position; Capturing the first surface of the electrode tab located at the electrode tab winding-in position to obtain the third captured image.

5. The pole piece detection method according to claim 1, characterized in that After the step of determining, according to the coating misalignment amount and the first separator wrapping value, the second separator wrapping value of the second surface of the electrode tab, the method further includes: Determining a rectification parameter for the next moment according to the first separator wrapping value and the second separator wrapping value, so as to rectify the unwinding of the electrode tab at the next moment according to the rectification parameter.

6. A pole piece detection device, characterized in that, The device includes: An insertion position image acquisition module, configured to obtain a first captured image of the first surface of the electrode tab located at the electrode tab insertion position and a second captured image of the second surface; A coating misalignment amount determination module, configured to determine a coating misalignment amount between a first surface and a second surface of the pole piece according to the first captured image and the second captured image, where the coating misalignment amount is used to characterize a misalignment amount between a first distance between a coating edge of the first surface of the pole piece and a same-side edge and a second distance between a coating edge of the second surface of the pole piece and the same-side edge; An incoming roll position image acquisition module, configured to acquire a third captured image of the first surface of the pole piece located at the incoming roll position of the pole piece; A first separator coating value determination module, configured to determine a first separator coating value of the first surface of the pole piece according to the third captured image; A second separator coating value determination module, configured to determine a second separator coating value of the second surface of the pole piece according to the coating misalignment amount and the first separator coating value.

7. A pole piece detection system, characterized in that, The system includes: A first camera, configured to capture an image of the first surface of the pole piece located at the pole piece insertion position; A second camera, configured to capture an image of the second surface of the pole piece located at the pole piece insertion position; A third camera, configured to capture an image of the first surface of the pole piece located at the incoming roll position of the pole piece; A controller, electrically connected to the first camera, the second camera, and the third camera respectively, and configured to execute the pole piece detection method according to any one of claims 1 to 5.

8. The pole piece detection system according to claim 7, wherein, The third camera is a CCD camera.

9. An electronic device, characterized in that, It includes: A processor; A memory for storing executable instructions of the processor; Wherein, the processor is configured to execute the instructions to implement the pole piece detection method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the pole piece detection method according to any one of claims 1 to 5.

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