Battery monitoring methods, apparatuses, systems, devices, media, and program products

Abstract

The application relates to a battery monitoring method, device, system, equipment, medium and program product. The method comprises the following steps: in the process of winding the pole piece, a plurality of scanning images and a plurality of monitoring thicknesses are obtained for two pole piece surfaces of the anode pole piece and two pole piece surfaces of the cathode pole piece respectively; the plurality of scanning images corresponding to each pole piece surface are divided to obtain a plurality of differential pole piece images corresponding to each pole piece surface and the corresponding relationship between the differential pole piece images; the plurality of differential pole piece images corresponding to each pole piece surface are matched with the plurality of monitoring thicknesses corresponding to each pole piece surface to obtain the monitoring thickness corresponding to each differential pole piece image; the ratio of the pole piece surface capacity is calculated according to the corresponding relationship between the differential pole piece images and the monitoring thickness corresponding to each differential pole piece image; and the battery balance monitoring result of the anode pole piece and the cathode pole piece is determined according to the ratio of the pole piece surface capacity. The application can monitor the battery balance in real time and improve the quality of the battery.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, specifically to a battery monitoring method, device, system, equipment, medium, and program product. Background Technology

[0002] With the development of new energy technologies, the application fields of batteries are becoming increasingly widespread. For example, new energy vehicles, intelligent robots, and drones powered by batteries, as well as energy storage systems built using batteries.

[0003] Cell balance (CB) mainly involves considering the coating thickness of the electrodes during the structural and performance design of the battery to ensure that the main material has sufficient capacity to support lithium-ion insertion and extraction during cycle use.

[0004] However, there is currently no effective means to monitor battery balance in real time during battery production. If there is an imbalance in the coating of the anode and cathode electrodes, it will seriously affect the battery quality. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a battery monitoring method, apparatus, system, device, medium, and program product that can monitor battery balance in real time and improve battery quality.

[0006] In a first aspect, this application provides a method for monitoring a battery, the method comprising:

[0007] During the electrode winding process, multiple scanning images and multiple thickness monitoring are acquired for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode, respectively.

[0008] Multiple scanned images corresponding to each electrode surface are divided and processed to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images;

[0009] The multiple differential electrode images corresponding to each electrode surface are matched with the multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image.

[0010] The ratio of electrode surface capacity is calculated based on the correspondence between differential electrode images and the monitoring thickness corresponding to each differential electrode image. The battery balance monitoring results of the anode and cathode electrodes are determined based on the ratio of electrode surface capacity.

[0011] In the technical solution of this application embodiment, by acquiring a scanned image of the electrode surface and monitoring the thickness, the battery balance can be monitored in real time. Based on the battery balance, the process from battery coating to winding can be adjusted, thereby improving battery quality and reducing the risk of battery failure caused by battery balance problems.

[0012] In some embodiments, multiple scanned images corresponding to each electrode surface are divided to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images, including:

[0013] For each electrode surface, a complete image of the electrode is determined based on multiple scanned images corresponding to the electrode surface.

[0014] The overall image of the electrode is divided into grids to obtain multiple differential electrode images corresponding to the electrode surface;

[0015] Based on the winding relationship between the anode and cathode electrodes, position matching processing is performed on multiple differential electrode images to obtain the correspondence between the differential electrode images.

[0016] In the technical solution of this application embodiment, the overall image of the electrode is determined first based on multiple scanned images, which can improve the accuracy of the segmentation process, thereby improving the accuracy of the correspondence between the differential electrode images, and further improving the accuracy of the battery balance monitoring results.

[0017] In some embodiments, the overall image of the electrode is divided into grids to obtain multiple differential electrode images corresponding to the electrode surface, including:

[0018] The electrode size and mesh division logic are input into a pre-set finite element analysis model. The finite element analysis model is used to perform mesh division on the overall image of the electrode to obtain multiple differential electrode images corresponding to the electrode surface.

[0019] In the technical solution of this application embodiment, the finite element analysis model can be used to perform the partitioning process quickly and accurately, which improves the efficiency and accuracy of the partitioning process and provides support for determining the battery balance monitoring results.

[0020] In some embodiments, position matching processing is performed on multiple differential electrode images based on the winding relationship between the anode and cathode electrodes to obtain the correspondence between the differential electrode images, including:

[0021] Based on the winding relationship between the anode and cathode plates, determine the coordinate correspondence between the wound anode and cathode plates.

[0022] Based on the coordinate positions of each differential electrode image and the coordinate correspondence between the wound anode and cathode electrodes, position matching processing is performed on multiple differential electrode images to obtain the correspondence between the differential electrode images.

[0023] In the technical solution of this application embodiment, the coordinate correspondence is determined based on the winding relationship, and then the correspondence between the differential electrode images is determined. This can accurately match the positions of the differential electrode images, providing support for the subsequent determination of battery balance monitoring results.

[0024] In some embodiments, matching multiple differential electrode images corresponding to each electrode surface with multiple monitoring thicknesses corresponding to each electrode surface is performed to obtain the monitoring thickness corresponding to each differential electrode image, including:

[0025] For each electrode surface, based on the scanning time of each differential electrode image and the measurement time of each monitored thickness, multiple differential electrode images and multiple monitored thicknesses are matched to obtain the monitored thickness corresponding to each differential electrode image.

[0026] In the technical solution of this application embodiment, by matching the differential electrode image with the monitored thickness, the position of each monitored thickness on the electrode can be accurately determined, thereby accurately calculating the battery balance at different positions of the electrode.

[0027] In some embodiments, the ratio of electrode surface capacity is calculated based on the correspondence between differential electrode images and the monitoring thickness corresponding to each differential electrode image. The battery balance monitoring results for the anode and cathode electrodes are then determined based on this ratio, including:

[0028] Based on the monitoring thickness corresponding to each differential electrode image and the pre-set thickness-capacity relationship, determine the electrode surface capacity corresponding to each differential electrode image;

[0029] Based on the correspondence between the differential electrode images and the electrode surface capacity corresponding to each differential electrode image, the ratio of electrode surface capacity for the corresponding differential electrode image is calculated.

[0030] The ratios of the areal capacities of multiple electrodes are summarized to obtain the battery balance monitoring results for the anode and cathode electrodes.

[0031] In the technical solution of this application embodiment, the electrode surface capacity is calculated based on the monitored thickness, which can more accurately determine the battery balance and thus obtain more accurate battery balance monitoring results.

[0032] Secondly, this application provides a battery monitoring device, the device comprising:

[0033] The image thickness acquisition module is used to acquire multiple scan images and multiple monitored thicknesses for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode during the electrode winding process.

[0034] The segmentation processing module is used to segment multiple scanned images corresponding to each electrode surface to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images.

[0035] The thickness matching module is used to match multiple differential electrode images corresponding to each electrode surface with multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image.

[0036] The balance monitoring module is used to calculate the ratio of electrode surface capacity based on the correspondence between differential electrode images and the monitoring thickness corresponding to each differential electrode image, and to determine the battery balance monitoring results of the anode and cathode electrodes based on the ratio of electrode surface capacity.

[0037] Thirdly, this application provides a battery monitoring system, which includes four image scanning devices, four thickness measuring devices, and a controller; the controller is connected to the four image scanning devices and the four thickness measuring devices respectively.

[0038] An image scanning device used to scan the surface of an electrode to obtain multiple scanned images;

[0039] Thickness measuring equipment is used to measure the thickness of the material coated on the surface of the electrode to obtain multiple monitoring thicknesses;

[0040] A controller for performing the method as described in any one of the first aspects.

[0041] In the technical solution of this application embodiment, the monitoring system can monitor the battery balance in real time, providing a basis for adjusting the process parameters from battery coating to winding, thereby improving battery quality and reducing the risk of battery failure caused by battery balance problems.

[0042] In some embodiments, the controller is also connected to the winding mechanism;

[0043] The controller is also used to control the winding speed of the winding mechanism so that the belt speed of the electrode sheet matches the scanning speed of the image scanning device and the measurement speed of the thickness measuring device.

[0044] In the technical solution of this application embodiment, the controller controls the winding speed of the winding mechanism, which enables the winding mechanism, image scanning device and thickness measurement device to cooperate with each other to achieve better image scanning effect and thickness measurement effect, reduce the problem of missed scanning and missed measurement, and provide support for accurate calculation of battery balance.

[0045] Fourthly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method of any one of the first aspects.

[0046] Fifthly, this application also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of any one of the first aspects.

[0047] Sixthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the method of any one of the first aspects. Attached Figure Description

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the alternative embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0049] Figure 1 This is a schematic diagram of the structure of a battery monitoring system according to an embodiment of this application;

[0050] Figure 2 This is a schematic flowchart of a battery monitoring method according to an embodiment of this application;

[0051] Figure 3 This is a schematic diagram of electrode winding according to an embodiment of this application;

[0052] Figure 4 This is a flowchart illustrating the partitioning process steps according to an embodiment of this application;

[0053] Figure 5a This is one of the schematic diagrams showing the electrode dimensions of an embodiment of this application;

[0054] Figure 5b This is a second schematic diagram of the electrode dimensions according to an embodiment of this application;

[0055] Figure 6 This is a schematic flowchart of the location matching processing steps according to an embodiment of this application;

[0056] Figure 7 This is a flowchart illustrating the steps for determining battery balance monitoring results according to an embodiment of this application;

[0057] Figure 8 This is a structural block diagram of a battery monitoring device according to an embodiment of this application;

[0058] Figure 9 This is an internal structural diagram of a computer device according to an embodiment of this application.

[0059] Explanation of reference numerals in the attached figures:

[0060] 11. First image scanning device; 12. Second image scanning device; 13. Third image scanning device;

[0061] 14. Fourth image scanning device; 15. First thickness measuring device; 16. Second thickness measuring device;

[0062] 17. Third thickness measuring device; 18. Fourth thickness measuring device; 19. Winding mechanism. Detailed Implementation

[0063] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0066] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0068] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0069] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0070] With the development of new energy technologies, the application fields of batteries are becoming increasingly widespread. For example, battery-powered new energy vehicles, intelligent robots, drones, and energy storage systems are all based on batteries. Cell balance (CB) primarily involves considering the coating thickness of the electrode sheets during the structural and performance design of the battery to ensure that the battery has sufficient material to support lithium-ion insertion and extraction during cycling.

[0071] The aforementioned battery balance CB refers to the ratio of the capacity of the negative electrode to the capacity of the positive electrode, given the same area. According to an embodiment of this application, the battery balance CB can be calculated using the formula CB=Ca / Cc, where Ca is the charging capacity obtained through a reversible capacity test of the negative electrode, and Cc is the discharging capacity obtained through a reversible capacity test of the positive electrode.

[0072] The reversible capacity of the negative electrode was determined through the following steps: A single-sided coated negative electrode sheet was cut into a 14mm diameter circle, weighed, and its mass (Ma) was obtained after deducting the mass of the negative electrode current collector. The mass is expressed in mg. A coin cell was assembled in a glove box, using a small lithium metal disc as the counter electrode and the prepared electrolyte. After standing at 25°C for 6 hours, it was discharged at a constant current rate of 0.1C to 5mV, then discharged at a constant current rate of 0.01C to 5mV. After standing for 5 minutes, it was charged at a constant current rate of 0.1C to 0.7V. The charging capacity was denoted as Ca, in mAh.

[0073] The reversible capacity of the positive electrode can be determined through the following steps: Take a single-sided coated positive electrode sheet, cut it into a circular piece with a diameter of 14 mm, weigh it, and after deducting the mass of the positive electrode current collector, obtain the mass Mc of the positive electrode sheet, in mg. Assemble a coin cell in a glove box, using a small lithium metal disc as the counter electrode and the prepared electrolyte. After standing at 25°C for 6 hours, charge at a constant current rate of 0.1C to 4.25V, then charge at a constant current rate of 0.05C to 4.25V, then stand for 5 minutes, and discharge at a constant current rate of 0.1C to 2.8V. The discharge capacity is recorded as Cc, in mAh.

[0074] Currently, many factors affect CB in the battery coating and winding process, including local CB problems (such as insufficient coating due to particle scratches, abnormal coating control, and insufficient coating on some film rolls), and large-area CB problems (such as excessive coating on the cathode, insufficient coating on the anode, and mismatch of anode CB after winding and matching).

[0075] Cathode-anode (CB) mismatch can cause the following problems: If there are too many cathodes and too few anodes, resulting in CB mismatch, after the battery is charged, lithium ions will escape from the cathode and embed into the anode material. Because the anode material cannot meet the number of lithium ions extracted from the cathode, even after the anode is fully embedded, some lithium ions will remain and accumulate on the anode surface as elemental lithium, a phenomenon known as anode lithium deposition. These continuously deposited lithium ions will grow into lithium dendrites, which have sharp, long tips that can pierce the separator and reach the cathode. When the anode and cathode are connected, the battery is prone to low voltage, smoke, and violent fires. Therefore, CB mismatch can seriously affect battery quality.

[0076] Monitoring battery balance (CB) during battery production typically involves weighing portions of both the anode and cathode electrodes and calculating the CB based on the weight. However, this method cannot be performed online in real-time, impacting production efficiency. Therefore, there is currently no effective means for real-time monitoring of battery balance.

[0077] To address the aforementioned problems, this application provides a battery monitoring method. During the electrode winding process, this method acquires multiple scan images and monitors multiple thicknesses on the two surfaces of the anode and cathode electrodes, respectively. Then, based on the scan images and monitor thicknesses, a series of calculations are performed to determine the battery balance monitoring results for the anode and cathode electrodes. Through the technical solution of this application, the battery balance can be monitored in real time, allowing adjustments to the battery coating and winding processes based on the battery balance, thereby improving battery quality and reducing the risk of battery failure due to balance issues.

[0078] According to some embodiments of this application, a battery monitoring system is provided. The monitoring system includes four image scanning devices, four thickness measuring devices, and a controller; the controller is connected to the four image scanning devices and the four thickness measuring devices respectively; the image scanning devices are used to scan the electrode surface to obtain multiple scan images; the thickness measuring devices are used to measure the thickness of the material coated on the electrode surface to obtain multiple monitoring thicknesses; the controller is used to determine the battery balance monitoring result based on the scan images and the monitoring thicknesses.

[0079] In the embodiments of this application, reference is made to Figure 1The battery monitoring system includes a first image scanning device 11, a second image scanning device 12, a third image scanning device 13, a fourth image scanning device 14, a first thickness measuring device 15, a second thickness measuring device 16, a third thickness measuring device 17, and a fourth thickness measuring device 18. In this configuration, the first image scanning device 11 and the second image scanning device 12 are positioned opposite each other, with the first image scanning device 11 facing the electrode surface A of the anode electrode and the second image scanning device 12 facing the electrode surface B of the anode electrode; the first thickness measuring device 15 and the second thickness measuring device 16 are positioned opposite each other, with the first thickness measuring device 15 facing the electrode surface A of the anode electrode and the second thickness measuring device 16 facing the electrode surface B of the anode electrode; the third image scanning device 13 and the fourth image scanning device 14 are positioned opposite each other, with the third image scanning device 13 facing the electrode surface A of the cathode electrode and the fourth image scanning device 14 facing the electrode surface B of the cathode electrode; and the third thickness measuring device 17 and the fourth thickness measuring device 18 are positioned opposite each other, with the third thickness measuring device 17 facing the electrode surface A of the cathode electrode and the fourth thickness measuring device 18 facing the electrode surface B of the cathode electrode. It should be noted that the controller and its connection relationship are not shown in the figure.

[0080] During the electrode winding process, the anode electrode passes through the first image scanning device 11, the second image scanning device 12, the first thickness measuring device 15, and the second thickness measuring device 16 before entering the winding mechanism 19. The first image scanning device 11 scans the electrode surface A of the anode electrode to obtain multiple scanned images, the second image scanning device 12 scans the electrode surface B of the anode electrode to obtain multiple scanned images, the first thickness measuring device 15 measures the thickness of the material coated on the electrode surface A of the anode electrode to obtain multiple monitored thicknesses, and the second thickness measuring device 16 measures the thickness of the material coated on the electrode surface B of the anode electrode to obtain multiple monitored thicknesses.

[0081] The cathode electrode passes through the third image scanning device 13, the fourth image scanning device 14, the third thickness measuring device 17, and the fourth thickness measuring device 18 before entering the winding mechanism 19. The third image scanning device 13 scans the electrode surface A of the cathode electrode to obtain multiple scanned images; the fourth image scanning device 14 scans the electrode surface B of the cathode electrode to obtain multiple scanned images; the third thickness measuring device 17 measures the thickness of the material coated on the electrode surface A of the cathode electrode to obtain multiple monitored thicknesses; and the fourth thickness measuring device 18 measures the thickness of the material coated on the electrode surface B of the cathode electrode to obtain multiple monitored thicknesses.

[0082] The winding mechanism 19 winds the anode and cathode plates into shape.

[0083] Four image scanning devices transmit multiple scanned images to the controller, and four thickness measuring devices transmit multiple monitored thicknesses to the controller. The controller calculates the ratio of electrode surface capacity based on the multiple scanned images and monitored thicknesses, and then calculates the battery balance monitoring result for the anode and cathode electrodes based on this ratio. This battery balance monitoring result is used to characterize whether the coating amount or capacity at corresponding positions on the anode and cathode electrodes is matched.

[0084] In some embodiments, the image scanning device may be a CCD (charge-coupled device) camera, or other devices. The thickness measuring device may be a β-ray thickness gauge, or other devices. It should be noted that the embodiments of this application do not limit the image scanning device and the thickness measuring device, and they can be selected according to the actual situation.

[0085] In the above embodiments, the battery monitoring system includes four image scanning devices, four thickness measuring devices, and a controller. The image scanning devices scan the electrode surface to obtain multiple scanned images; the thickness measuring devices measure the thickness of the material coated on the electrode surface to obtain multiple monitored thicknesses; the controller calculates the ratio of electrode surface capacity based on the scanned images and monitored thicknesses, and determines the battery balance monitoring result based on the ratio of electrode surface capacity. In the technical solution of this application embodiment, the monitoring system can monitor the battery balance in real time, providing a basis for adjusting process parameters from battery coating to winding, thereby improving battery quality and reducing the risk of battery failure due to battery balance problems.

[0086] According to some embodiments of this application, refer to Figure 1 The controller is also connected to the winding mechanism 19; the controller is also used to control the winding speed of the winding mechanism 19 so that the tape speed of the electrode sheet matches the scanning speed of the image scanning device and the measurement speed of the thickness measuring device. It should be noted that the controller and its connection relationship are not shown in the figure.

[0087] In this embodiment, the controller is also communicatively connected to the winding mechanism 19. The controller controls the winding speed of the winding mechanism 19 so that the conveying speed of the anode and cathode electrodes matches the scanning speed of the image scanning device and the measurement speed of the thickness measuring device. That is, during the winding process of the anode and cathode electrodes, the speeds of the image scanning device and the thickness measuring device ensure that multiple scans by the image scanning device and multiple measurements by the thickness measuring device will not result in omissions or gaps.

[0088] In the above embodiments, the controller controls the winding speed of the winding mechanism to match the electrode's conveying speed with the scanning speed of the image scanning device and the measurement speed of the thickness measuring device. In the technical solution of this application embodiment, the controller controlling the winding speed of the winding mechanism allows the winding mechanism, image scanning device, and thickness measuring device to cooperate with each other, achieving better image scanning and thickness measurement results, reducing the problem of missed scans and measurements, and providing support for accurate battery balance calculation.

[0089] According to some embodiments of this application, refer to Figure 2 A battery monitoring method is provided, which can be applied to... Figure 1 Taking the controller of the monitoring system as an example, the method may include:

[0090] Step 201: During the electrode winding process, acquire multiple scanning images and multiple monitoring thicknesses for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode, respectively.

[0091] During the electrode winding process, the controller acquires multiple scan images of the two electrode surfaces of the anode electrode from the first image acquisition device and the second image acquisition device, acquires multiple monitoring thicknesses of the two electrode surfaces of the anode electrode from the first thickness measurement device and the second thickness measurement device, acquires multiple scan images of the two electrode surfaces of the cathode electrode from the third image acquisition device and the fourth image acquisition device, and acquires multiple monitoring thicknesses of the two electrode surfaces of the cathode electrode from the third thickness measurement device and the fourth thickness measurement device.

[0092] Step 202: Divide the multiple scan images corresponding to each electrode surface into multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images.

[0093] For each electrode surface corresponding to multiple scanned images, the controller performs a partitioning process on each scanned image to obtain multiple differential electrode images corresponding to each electrode surface. For example, the electrode surface A of the anode electrode corresponds to m scanned images. The controller performs partitioning processing on scanned image 1, scanned image 2, and so on, partitioning scanned image m to obtain n differential electrode images corresponding to the electrode surface A of the anode electrode. Similarly, for the electrode surface B of the anode electrode, and the electrode surface A and electrode surface B of the cathode electrode, the above partitioning process is performed to obtain multiple differential electrode images.

[0094] Because the anode and cathode electrodes adhere to each other after winding, refer to Figure 3The anode electrode surface A is bonded to the cathode electrode surface B, and the anode electrode surface B is bonded to the cathode electrode surface A. Based on this winding relationship, position matching processing can be performed on the differential electrode images to obtain the correspondence between them. For example, after winding, differential electrode image 1 on the anode electrode surface A corresponds in position to differential electrode image 5 on the cathode electrode surface B.

[0095] Step 203: Match the multiple differential electrode images corresponding to each electrode surface with the multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image.

[0096] For each differential electrode image on the surface of each electrode, the monitoring thickness corresponding to the position of the differential electrode image is found from multiple monitoring thicknesses, and the monitoring thickness corresponding to each differential electrode image is obtained.

[0097] For example, the monitoring thickness corresponding to the position of differential electrode image 1 is found from multiple monitoring thicknesses corresponding to electrode surface A of the anode electrode; the monitoring thickness corresponding to the position of differential electrode image 2 is found from multiple monitoring thicknesses corresponding to electrode surface A of the anode electrode. This process is repeated to determine the monitoring thickness corresponding to each differential electrode image corresponding to electrode surface A of the anode electrode, each differential electrode image corresponding to electrode surface B of the anode electrode, each differential electrode image corresponding to electrode surface A of the cathode electrode, and each differential electrode image corresponding to electrode surface B of the cathode electrode.

[0098] Step 204: Calculate the ratio of electrode surface capacity based on the correspondence between differential electrode images and the monitoring thickness corresponding to each differential electrode image, and determine the battery balance monitoring results of the anode and cathode electrodes based on the ratio of electrode surface capacity.

[0099] Since there is a correlation between the monitoring thickness and the electrode surface capacity, the monitoring thickness can be used to characterize the electrode surface capacity. Therefore, after determining the monitoring thickness corresponding to each differential electrode image, the ratio of the electrode surface capacity, i.e., the battery balance, can be calculated based on the correspondence between the differential electrode images and the monitoring thickness corresponding to each differential electrode image. Based on the calculated battery balance, the battery balance monitoring results of the anode and cathode electrodes can be determined.

[0100] For example, the differential electrode image 1 of the anode electrode surface A corresponds to the differential electrode image 5 of the cathode electrode surface B. Furthermore, the monitoring thickness corresponding to differential electrode image 1 of the anode electrode surface A is h1, and the monitoring thickness corresponding to differential electrode image 5 of the cathode electrode surface B is h2. The ratio of monitoring thickness h1 to monitoring thickness h2 is calculated to obtain a battery balance. Similarly, multiple battery balances can be calculated. The mean or median of the multiple battery balances is determined as the battery balance monitoring result for the anode and cathode electrodes.

[0101] It should be noted that the closer the calculated battery balance monitoring result is to 1, the closer the coating thickness and capacity are at the corresponding bonding positions of the anode and cathode electrodes. This ensures that the bonding positions of the anode and cathode electrodes are sufficient to support lithium ion insertion and extraction during battery cycling.

[0102] In some embodiments, a pre-set balance range is established. If the battery balance monitoring result is within the range, it indicates that the coating process is normal and the quality of the wound cells is normal. If the battery balance monitoring result exceeds the range, it indicates that the coating process is abnormal and the quality of the wound cells is abnormal. Alarm information can be output for abnormal situations, allowing production line personnel to adjust the coating process based on the alarm information. Alternatively, production line personnel can take appropriate action on the abnormal cells, such as reducing the charging rate and / or upper charging voltage limit in subsequent polarization processes, or directly scrapping the abnormal cells.

[0103] It should be noted that the balance range is set according to the actual needs of the production line, and the handling of battery balance monitoring results exceeding the balance range can also be set according to the actual situation.

[0104] In some embodiments, the controller stores scanned images, monitored thickness, the position of differential electrode images, the correspondence between differential electrode images, the matching results of differential electrode images and monitored thickness, and battery balance monitoring results, which facilitates subsequent traceability of various records and data.

[0105] In the above embodiments, during the electrode winding process, multiple scan images and multiple monitoring thicknesses are acquired for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode, respectively. The multiple scan images corresponding to each electrode surface are divided to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between these differential electrode images. The multiple differential electrode images corresponding to each electrode surface are matched with the multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image. The ratio of electrode surface capacity is calculated based on the correspondence between the differential electrode images and the monitoring thickness corresponding to each differential electrode image. The battery balance monitoring result for the anode and cathode electrodes is determined based on the ratio of electrode surface capacity. In the technical solution of this application embodiment, by acquiring scan images and monitoring thicknesses of the electrode surfaces, the battery balance can be monitored in real time. This allows for adjustments to the battery coating and winding processes based on the battery balance, thereby improving battery quality and reducing the risk of battery failure due to battery balance issues.

[0106] According to some embodiments of this application, refer to Figure 4 In the above embodiment, "dividing multiple scanned images corresponding to each electrode surface to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images" may include the following steps:

[0107] Step 301: For each electrode surface, determine the overall image of the electrode based on multiple scanned images corresponding to the electrode surface.

[0108] During the actual scanning process of an image scanning device, multiple scanned images corresponding to each electrode surface may overlap. For example, for electrode surface A of an anode electrode, scanned image 1 includes the starting position of the anode electrode, the first tab, and the second tab, while scanned image 2 includes the second tab and the third tab. It is evident that the second tab in scanned image 1 overlaps with the second tab in scanned image 2. In this case, the accuracy of the segmentation process and the accuracy of the correspondence between the differential electrode images will be affected.

[0109] Considering the above, for each electrode surface, multiple scanned images corresponding to that surface can be stitched together to obtain a complete image of the electrode. For example, stitching together multiple scanned images corresponding to electrode surface A of the anode electrode yields a complete image of electrode surface A; stitching together multiple scanned images corresponding to electrode surface B of the anode electrode yields a complete image of electrode surface B. Similarly, this process is repeated to obtain complete images of electrode surface A and electrode surface B of the cathode electrode.

[0110] During the splicing process, since each tab is equipped with a marking hole and the spacing between each pair of adjacent tabs is different (from the starting position of feeding to the ending position of discharging, the spacing between each pair of adjacent tabs gradually increases), multiple scanned images can be spliced ​​based on the scanning time of each scanned image and the marking holes of the tabs identified from each scanned image.

[0111] It should be noted that the splicing process is not limited to the above implementation method. In practical applications, other implementation methods can also be used.

[0112] Step 302: Perform gridding processing on the overall image of the electrode to obtain multiple differential electrode images corresponding to the electrode surface.

[0113] The overall image of the electrode is divided into multiple grids based on the electrode size, and the image in each grid is a differential electrode image.

[0114] Reference Figure 5a The cathode electrode is 5000mm long and 100mm wide, and the anode electrode is 5100mm long and 100mm wide. Based on these electrode dimensions, the overall image of the corresponding surfaces of the two cathode electrodes is segmented, and the overall image of the corresponding surfaces of the two anode electrodes is segmented. (Refer to...) Figure 5b The cathode electrode is 10000mm long and 200mm wide, and the anode electrode is 10100mm long and 200mm wide. The overall images of the cathode electrode and the anode electrode are divided according to their dimensions.

[0115] It should be noted that, with different electrode sizes, the size of the differential electrode images obtained by meshing may be different, or the number of differential electrode images obtained by meshing may be different.

[0116] Step 303: Perform position matching processing on multiple differential electrode images according to the winding relationship between the anode and cathode electrodes to obtain the correspondence between the differential electrode images.

[0117] Based on the alignment of the anode electrode surface A with the cathode electrode surface B after winding, and the alignment of the anode electrode surface B with the cathode electrode surface A, the positions of multiple differential electrode images corresponding to the anode electrode surface A and the cathode electrode surface B can be matched. This matching process yields the correspondence between every two differential electrode images after winding the anode and cathode electrodes, thus obtaining the correspondence between the winding differential electrode images.

[0118] In the above embodiments, for each electrode surface, a complete electrode image is determined based on multiple scanned images corresponding to the electrode surface; the complete electrode image is then divided into grids to obtain multiple differential electrode images corresponding to the electrode surface; the multiple differential electrode images are then matched according to the winding relationship between the anode and cathode electrodes to obtain the correspondence between the differential electrode images. In the technical solution of this application embodiment, determining the complete electrode image based on multiple scanned images first improves the accuracy of the gridding process, thereby improving the accuracy of the correspondence between the differential electrode images, and ultimately improving the accuracy of the battery balance monitoring results.

[0119] According to some embodiments of this application, the above embodiment of "performing a mesh division process on the overall image of the electrode to obtain multiple differential electrode images corresponding to the electrode surface" may include: inputting the electrode size and mesh division logic into a pre-set finite element analysis model, and performing a mesh division process on the overall image of the electrode through the finite element analysis model to obtain multiple differential electrode images corresponding to the electrode surface.

[0120] The meshing logic can include at least one of the following: the size of the unit mesh, the number of meshes after division, and the number of rows and columns. For example, the meshing logic may specify that each mesh is 10mm*10mm in size; or, the meshing logic may specify that the number of meshes after division is p; or, the meshing logic may specify that the meshes are divided according to the number of rows i and the number of columns j.

[0121] It should be noted that the grid partitioning logic is not limited to the above example, and other grid partitioning logics can be used in practical applications.

[0122] In some embodiments, the meshing process can employ a finite element analysis model. The controller pre-sets the electrode size and meshing logic, or it acquires the electrode size and meshing logic input by production line personnel. When meshing is required, the electrode size, meshing logic, and a full-view image of the electrode are input into the finite element analysis model. The finite element model then performs meshing on the full-view image of the electrode according to the electrode size and meshing logic, resulting in multiple differential electrode images corresponding to the electrode surface.

[0123] In the above embodiments, the electrode size and mesh division logic are input into a pre-set finite element analysis model. The finite element analysis model is used to perform mesh division processing on the overall image of the electrode, resulting in multiple differential electrode images corresponding to the electrode surface. In the technical solution of this application embodiment, the finite element analysis model can be used for fast and accurate mesh division processing, improving the efficiency and accuracy of the mesh division process and providing support for determining the battery balance monitoring results.

[0124] According to some embodiments of this application, refer to Figure 6 In the above embodiment, "performing position matching processing on multiple differential electrode images based on the winding relationship between the anode and cathode electrodes to obtain the correspondence between the differential electrode images" may include the following steps:

[0125] Step 401: Determine the coordinate correspondence between the wound anode and cathode plates based on the winding relationship between the anode and cathode plates.

[0126] After winding, the electrode surface A of the anode electrode is attached to the electrode surface B of the cathode electrode, and the electrode surface B of the anode electrode is attached to the electrode surface A of the cathode electrode.

[0127] For example, the coordinates of the two corner points at the initial feeding position of the anode electrode are (anode A0, anode A0) and (anode A0, anode A100), respectively. After feeding, the corner point coordinates of the initial feeding position of the cathode electrode (cathode A0, cathode A0) correspond to the coordinates of the anode electrode (anode A50, anode A0), and the corner point coordinates of the initial feeding position of the cathode electrode (cathode A0, cathode A100) correspond to the coordinates of the anode electrode (anode B50, anode B100).

[0128] For example, the coordinates of the two corner points at the initial feeding position of the anode electrode are (A0, A0) and (A0, A200). After feeding, the corner point coordinates of the initial feeding position of the cathode electrode (A0, A0) correspond to the coordinates of the anode electrode (A70, A0), and the corner point coordinates of the initial feeding position of the cathode electrode (A0, A200) correspond to the coordinates of the anode electrode (B70, B200).

[0129] Step 402: Based on the coordinate positions of each differential electrode image and the coordinate correspondence between the wound anode and cathode electrodes, position matching processing is performed on multiple differential electrode images to obtain the correspondence between the differential electrode images.

[0130] After meshing, the coordinate positions of each differential electrode image can be obtained. Based on the coordinate correspondence between the wound anode and cathode electrodes, and the coordinate positions of each differential electrode image, the positions of multiple differential electrode images corresponding to electrode surface A of the anode electrode are matched with those corresponding to electrode surface B of the cathode electrode, and vice versa. This results in the correspondence between every two differential electrode images after the anode and cathode electrodes are wound, thus obtaining the correspondence between the differential electrode images.

[0131] In some embodiments, the controller stores the coordinate correspondence between the wound anode and cathode electrodes and the correspondence between differential electrode images, providing support for subsequent traceability recording.

[0132] In the above embodiments, the coordinate correspondence between the wound anode and cathode electrodes is determined based on the winding relationship between the anode and cathode electrodes. Then, based on the coordinate positions of each differential electrode image and the coordinate correspondence between the wound anode and cathode electrodes, position matching processing is performed on multiple differential electrode images to obtain the correspondence between the differential electrode images. In the technical solution of this application embodiment, determining the coordinate correspondence based on the winding relationship, and then determining the correspondence between the differential electrode images, allows for accurate position matching of the differential electrode images, providing support for subsequent determination of battery balance monitoring results.

[0133] According to some embodiments of this application, the above embodiment of "matching multiple differential electrode images corresponding to each electrode surface with multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image" may include: for each electrode surface, matching multiple differential electrode images with multiple monitoring thicknesses according to the scanning time of each differential electrode image and the measurement time of each monitoring thickness to obtain the monitoring thickness corresponding to each differential electrode image.

[0134] For each electrode surface, the scanning time of multiple scan images corresponding to that electrode surface is known, as are the measurement times of multiple monitoring thicknesses corresponding to that electrode surface. Based on the scanning time of each scan image, the scanning time of each differential electrode image can be calculated. By aligning the scanning time of each differential electrode image with the measurement time of each monitoring thickness, the correspondence between the differential electrode image and the monitoring thickness can be obtained, thereby determining the monitoring thickness corresponding to each differential electrode image.

[0135] For example, if the scanning time of the differential electrode image 1 corresponding to electrode surface A of the anode electrode is t1, and the measurement time of the monitoring thickness h1 corresponding to electrode surface A of the anode electrode is also t1, then the monitoring thickness corresponding to the differential electrode image 1 corresponding to electrode surface A of the anode electrode can be determined as h1. Similarly, the monitoring thickness of each differential electrode image corresponding to each electrode surface of the anode electrode, and the monitoring thickness of each differential electrode image corresponding to each electrode surface of the cathode electrode can be determined.

[0136] In some embodiments, the thickness measurement device employs a laser thickness gauge, which can perform multi-point measurements on the electrode surface. When matching multiple differential electrode images with multiple monitored thicknesses, there may be a situation where one differential electrode image corresponds to multiple monitored thicknesses. In this case, the mean or median of the multiple monitored thicknesses can be used as the monitored thickness of the differential electrode image. Conversely, there may be a situation where one differential electrode image does not have a corresponding monitored thickness. In this case, the monitored thicknesses of other differential electrode images adjacent to the current differential electrode image can be determined first, and the thickness of the current differential electrode image can be determined using the monitored thicknesses of the other differential electrode images. For example, the monitored thicknesses of other differential electrode images can be used as the monitored thickness of the current differential electrode image, or interpolation can be performed on the monitored thicknesses of other differential electrode images to obtain the monitored thickness of the current differential electrode image.

[0137] In the above embodiments, for each electrode surface, based on the scanning time of each differential electrode image and the measurement time of each monitored thickness, multiple differential electrode images are matched with multiple monitored thicknesses to obtain the monitored thickness corresponding to each differential electrode image. In the technical solution of this application embodiment, matching differential electrode images with monitored thicknesses can accurately determine the position of each monitored thickness on the electrode, thereby accurately calculating the battery balance at different positions of the electrode.

[0138] According to some embodiments of this application, refer to Figure 7 In the above embodiment, "calculating the ratio of electrode surface capacity based on the correspondence between differential electrode images and the monitoring thickness corresponding to each differential electrode image, and determining the battery balance monitoring results of the anode and cathode electrodes based on the ratio of electrode surface capacity" may include the following steps:

[0139] Step 501: Determine the electrode surface capacity corresponding to each differential electrode image based on the monitored thickness corresponding to each differential electrode image and the pre-set thickness-capacity relationship.

[0140] The pre-set thickness-capacity relationship includes the correspondence between the monitored thickness and the electrode surface capacity. For each differential electrode image, its corresponding monitored thickness is substituted into the above thickness-capacity relationship. First, the product of the incoming material capacity, the monitored thickness, and the proportion of the main powder is calculated, as well as the sum of the cold-pressed elongation rate and 1. Then, the ratio between the product and the sum is calculated to obtain the electrode surface capacity, as shown in equation (1):

[0141] ------------------------------(1)

[0142] Among them, C first The incoming material capacity represents the capacity per unit mass of incoming material, expressed in Ah / g. The capacity may vary depending on the type of incoming material, but the capacity for a single type of material is generally fixed. This incoming material is the coating material on the electrode surface. CW represents the monitored thickness, f. loading This represents the percentage of main flour in the incoming material. (C) first ×CW×f loading Q represents the surface capacitance of the electrode before the rolling process. areal The electrode surface capacity is the electrode surface capacity after the coating material on the electrode surface has been stretched through the rolling process.

[0143] Step 502: Based on the correspondence between the differential electrode images and the electrode surface capacity corresponding to each differential electrode image, calculate the ratio of the electrode surface capacity for the differential electrode images corresponding to the positions.

[0144] Based on the correspondence between the differential electrode images, the electrode surface capacity of the two corresponding differential electrode images is determined, and the ratio of the electrode surface capacity of the two differential electrode images is calculated. By analogy, multiple ratios of electrode surface capacities can be obtained, thus obtaining multiple battery balances.

[0145] For example, the correspondence between differential electrode images includes: differential electrode image 1 of electrode surface A of the anode electrode corresponds to differential electrode image 5 of electrode surface B of the cathode electrode, and the areal capacitance of differential electrode image 1 of electrode surface A of the anode electrode is Q. areal阳极 The differential electrode image 5 shows the electrode surface capacitance Q of the cathode electrode, representing the electrode surface B. areal阴极 The ratio of the capacitances of the two electrodes is calculated to obtain a CB, as shown in equation (2):

[0146] ------------------------------------(2)

[0147] Step 503: Summarize the ratios of the surface capacities of multiple electrodes to obtain the battery balance monitoring results for the anode and cathode electrodes.

[0148] By summing up the calculated ratios of the areal capacities of multiple electrodes, the range of CB can be obtained. This range is then used as the battery balance monitoring result for the anode and cathode electrodes. For example, the calculated range of CB is (1.03~1.15), or the calculated range of CB is (1.02~1.23).

[0149] In the above embodiments, the electrode surface capacity corresponding to each differential electrode image is determined based on the monitored thickness and a pre-set thickness-capacity relationship. Based on the correspondence between differential electrode images and the electrode surface capacity corresponding to each differential electrode image, the ratio of electrode surface capacity to the corresponding differential electrode image is calculated. In the technical solution of this application embodiment, calculating the electrode surface capacity based on the monitored thickness allows for a more accurate determination of the battery balance, thereby obtaining more accurate battery balance monitoring results.

[0150] According to some embodiments of this application, a battery monitoring method is provided, which is applied to... Figure 1 Taking the controller of the monitoring system as an example, the method may include:

[0151] Step 1: During the electrode winding process, acquire multiple scanning images and multiple monitoring thicknesses for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode, respectively.

[0152] Step 2: For each electrode surface, determine the overall image of the electrode based on multiple scanned images corresponding to the electrode surface.

[0153] Step 3: Input the electrode size and mesh division logic into the pre-set finite element analysis model. The finite element analysis model is used to perform mesh division processing on the overall image of the electrode to obtain multiple differential electrode images corresponding to the electrode surface.

[0154] Step 4: Determine the coordinate correspondence between the wound anode and cathode plates based on their winding relationship.

[0155] Step 5: Based on the coordinate positions of each differential electrode image and the coordinate correspondence between the wound anode and cathode electrodes, perform position matching processing on multiple differential electrode images to obtain the correspondence between the differential electrode images.

[0156] Step 6: For each electrode surface, based on the scanning time of each differential electrode image and the measurement time of each monitoring thickness, perform matching processing on multiple differential electrode images and multiple monitoring thicknesses to obtain the monitoring thickness corresponding to each differential electrode image.

[0157] Step 7: Determine the electrode surface capacity corresponding to each differential electrode image based on the monitored thickness corresponding to each differential electrode image and the pre-set thickness-capacity relationship.

[0158] Step 8: Based on the correspondence between the differential electrode images and the electrode surface capacity corresponding to each differential electrode image, calculate the ratio of the electrode surface capacity for the differential electrode images corresponding to the positions.

[0159] Step 9: Summarize the ratios of the surface capacities of multiple electrodes to obtain the battery balance monitoring results for the anode and cathode electrodes.

[0160] In the technical solution of this application embodiment, by acquiring a scanned image of the electrode surface and monitoring the thickness, the battery balance can be monitored in real time. Based on the battery balance, the process from battery coating to winding can be adjusted, thereby improving battery quality and reducing the risk of battery failure caused by battery balance problems.

[0161] It should be understood that although the steps in the flowchart above are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps.

[0162] Based on the same inventive concept, this application also provides a battery monitoring device for implementing the battery monitoring method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more battery monitoring device embodiments provided below can be found in the limitations of the battery monitoring method described above, and will not be repeated here.

[0163] According to some embodiments of this application, refer to Figure 8 A battery monitoring device is provided, the device comprising:

[0164] The image thickness acquisition module 601 is used to acquire multiple scan images and multiple monitored thicknesses for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode respectively during the electrode winding process.

[0165] The segmentation processing module 602 is used to segment multiple scanned images corresponding to each electrode surface to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images.

[0166] The thickness matching module 603 is used to match multiple differential electrode images corresponding to each electrode surface with multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image.

[0167] The balance monitoring module 604 is used to calculate the ratio of electrode surface capacity based on the correspondence between differential electrode images and the monitoring thickness corresponding to each differential electrode image, and to determine the battery balance monitoring results of the anode and cathode electrodes based on the ratio of electrode surface capacity.

[0168] In some embodiments, the segmentation processing module 602 is specifically used to determine the overall image of the electrode based on multiple scanned images corresponding to the electrode surface for each electrode surface; perform grid segmentation processing on the overall image of the electrode to obtain multiple differential electrode images corresponding to the electrode surface; and perform position matching processing on the multiple differential electrode images according to the winding relationship between the anode electrode and the cathode electrode to obtain the correspondence between the differential electrode images.

[0169] In some embodiments, the partitioning processing module 602 is specifically used to input the electrode size and mesh partitioning logic into a pre-set finite element analysis model, and to perform mesh partitioning processing on the overall image of the electrode through the finite element analysis model to obtain multiple differential electrode images corresponding to the electrode surface.

[0170] In some embodiments, the partitioning processing module 602 is specifically used to determine the coordinate correspondence between the wound anode and cathode plates based on the winding relationship between the anode and cathode plates; and to perform position matching processing on multiple differential plate images based on the coordinate positions of each differential plate image and the coordinate correspondence between the wound anode and cathode plates to obtain the correspondence between the differential plate images.

[0171] In some embodiments, the thickness matching module 603 is specifically used to match multiple differential electrode images with multiple monitoring thicknesses based on the scanning time of each differential electrode image and the measurement time of each monitoring thickness for each electrode surface, so as to obtain the monitoring thickness corresponding to each differential electrode image.

[0172] In some embodiments, the balance monitoring module 604 is specifically used to determine the electrode surface capacity corresponding to each differential electrode image based on the monitoring thickness corresponding to each differential electrode image and a preset thickness-capacity relationship; calculate the ratio of electrode surface capacity for the differential electrode images corresponding to the positions based on the correspondence between the differential electrode images and the electrode surface capacity corresponding to each differential electrode image; and summarize the ratios of multiple electrode surface capacities to obtain the battery balance monitoring results of the anode and cathode electrodes.

[0173] Each module in the aforementioned battery monitoring device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the electronic device in hardware form or independent of it, or stored in the memory of the electronic device in software form, so that the processor can call and execute the operations corresponding to each module.

[0174] According to some embodiments of this application, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 9 As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a battery monitoring method. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0175] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0176] According to some embodiments of this application, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions that can be executed by a processor of an electronic device to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0177] According to some embodiments of this application, a computer program product is also provided, which, when executed by a processor, can implement the above-described methods. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, some or all of the above-described methods can be implemented, wholly or partially, according to the processes or functions described in the embodiments of this application.

[0178] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0179] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0180] The embodiments described above merely illustrate several implementation methods of this application to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A method for monitoring a battery, characterized in that, The method includes: During the electrode winding process, multiple scanning images and multiple thickness monitoring are acquired for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode, respectively. Multiple scanned images corresponding to each electrode surface are divided to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images; The multiple differential electrode images corresponding to each electrode surface are matched with the multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image. The ratio of electrode surface capacity is calculated based on the correspondence between the differential electrode images and the monitoring thickness corresponding to each differential electrode image. The battery balance monitoring result of the anode electrode and the cathode electrode is determined based on the ratio of electrode surface capacity. The step of matching multiple differential electrode images corresponding to each electrode surface with multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image includes: For each of the electrode surfaces, based on the scanning time of each of the differential electrode images and the measurement time of each of the monitoring thicknesses, the multiple differential electrode images and multiple monitoring thicknesses are matched to obtain the monitoring thickness corresponding to each of the differential electrode images; The matching process includes: when a differential electrode image corresponds to multiple monitoring thicknesses, the mean or median of the multiple monitoring thicknesses is used as the monitoring thickness of the differential electrode image; when a differential electrode image does not have a corresponding monitoring thickness, the monitoring thicknesses of other differential electrode images adjacent to the differential electrode image are determined, and the thickness of the differential electrode image is determined using the monitoring thicknesses of the other differential electrode images.

2. The method according to claim 1, characterized in that, The step of dividing the multiple scanned images corresponding to each of the electrode surfaces to obtain multiple differential electrode images corresponding to each of the electrode surfaces and the correspondence between the differential electrode images includes: For each of the electrode surfaces, a full-view image of the electrode is determined based on multiple scanned images corresponding to the electrode surface; The overall image of the electrode is divided into grids to obtain multiple differential electrode images corresponding to the surface of the electrode. Based on the winding relationship between the anode and cathode electrodes, position matching processing is performed on multiple differential electrode images to obtain the correspondence between the differential electrode images.

3. The method according to claim 2, characterized in that, The step of performing grid-based subdivision processing on the overall image of the electrode to obtain multiple differential electrode images corresponding to the electrode surface includes: The electrode size and mesh division logic are input into a pre-set finite element analysis model. The finite element analysis model is used to perform mesh division processing on the overall image of the electrode to obtain multiple differential electrode images corresponding to the electrode surface.

4. The method according to claim 2, characterized in that, The step of performing position matching processing on multiple differential electrode images based on the winding relationship between the anode and cathode electrodes to obtain the correspondence between the differential electrode images includes: Based on the winding relationship between the anode and cathode plates, determine the coordinate correspondence between the wound anode and cathode plates. Based on the coordinate positions of each differential electrode image and the coordinate correspondence between the anode and cathode electrodes after winding, position matching processing is performed on multiple differential electrode images to obtain the correspondence between the differential electrode images.

5. The method according to any one of claims 1-4, characterized in that, The step of calculating the ratio of electrode surface capacity based on the correspondence between the differential electrode images and the monitoring thickness corresponding to each differential electrode image, and determining the battery balance monitoring result of the anode and cathode electrodes based on the ratio of electrode surface capacity, includes: The electrode surface capacity corresponding to each differential electrode image is determined based on the monitored thickness and the pre-set thickness-capacity relationship. Based on the correspondence between the differential electrode images and the electrode surface capacity corresponding to each differential electrode image, the ratio of the electrode surface capacity of the differential electrode images corresponding to the positions is calculated. The ratios of the surface capacities of the multiple electrodes are summarized to obtain the battery balance monitoring results of the anode and cathode electrodes.

6. A battery monitoring device, characterized in that, The device includes: The image thickness acquisition module is used to acquire multiple scan images and multiple monitored thicknesses for the two electrode surfaces of the anode electrode and the two electrode surfaces of the cathode electrode during the electrode winding process. The segmentation processing module is used to segment multiple scanned images corresponding to each electrode surface to obtain multiple differential electrode images corresponding to each electrode surface and the correspondence between the differential electrode images. The thickness matching module is used to match multiple differential electrode images corresponding to each electrode surface with multiple monitoring thicknesses corresponding to each electrode surface to obtain the monitoring thickness corresponding to each differential electrode image. The balance monitoring module is used to calculate the ratio of electrode surface capacity based on the correspondence between the differential electrode images and the monitoring thickness corresponding to each differential electrode image, and to determine the battery balance monitoring result of the anode electrode and the cathode electrode based on the ratio of electrode surface capacity. The thickness matching module is specifically used to match multiple differential electrode images with multiple monitoring thicknesses based on the scanning time of each differential electrode image and the measurement time of each monitoring thickness for each electrode surface, so as to obtain the monitoring thickness corresponding to each differential electrode image. The matching process includes: when a differential electrode image corresponds to multiple monitoring thicknesses, the mean or median of the multiple monitoring thicknesses is used as the monitoring thickness of the differential electrode image; when a differential electrode image does not have a corresponding monitoring thickness, the monitoring thicknesses of other differential electrode images adjacent to the differential electrode image are determined, and the thickness of the differential electrode image is determined using the monitoring thicknesses of the other differential electrode images.

7. A battery monitoring system, characterized in that, The monitoring system includes four image scanning devices, four thickness measuring devices, and a controller; the controller is connected to each of the four image scanning devices and the four thickness measuring devices. The image scanning device is used to scan the surface of the electrode to obtain multiple scanned images; The thickness measuring device is used to measure the thickness of the material coated on the surface of the electrode to obtain multiple monitoring thicknesses; The controller is configured to perform the method as described in any one of claims 1-5.

8. The monitoring system according to claim 7, characterized in that, The controller is also connected to the winding mechanism; The controller is also used to control the winding speed of the winding mechanism so that the tape speed of the electrode sheet matches the scanning speed of the image scanning device and the measurement speed of the thickness measuring device.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 5.

11. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 5.

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