Pole piece deviation rectifying device, deviation rectifying method and related device

Abstract

The embodiment of the application provides a kind of polar piece rectification equipment, rectification method and related device, belong to the technical field of cell lamination.Polar piece rectification equipment includes straight roll, speed regulation roller group, driving device, first image acquisition device and processor;The speed regulation roller group is arranged in the side of the straight roll along the transmission direction, and the speed regulation roller group includes oppositely arranged first speed regulation roller group and second speed regulation roller group;The processor is used to obtain the polar piece contour according to the first position, and extract feature points in the polar piece contour, generate the lateral offset of the polar piece according to the difference between the initial coordinates of the feature points and standard coordinates;According to the lateral offset and the transmission speed of the straight roll, the first speed and the second speed are generated.The application combines visual detection to realize the rectification of polar piece by using speed regulation roller group, which can reduce the structural complexity of rectification equipment.In addition, the rectification model is trained by combining deep learning, which makes the rectification accuracy higher and the adjustability better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cell lamination, and in particular to a pole piece correction device, a correction method and related apparatus. BACKGROUND

[0002] Cell lamination refers to stacking a plurality of battery chips together in a certain manner to form a whole. The positive and negative pole piece compounding process plays an important role in the cell lamination process. Before the pole piece compounding, the position accuracy of the positive and negative pole pieces has a decisive influence on the quality and efficiency of the pole piece compounding. Therefore, in the technical field of cell lamination, great attention must be paid to and the accurate control of the position accuracy of the positive and negative pole pieces must be ensured.

[0003] In related technologies, in order to correct the position error of the pole piece, the method of inclined roller transmission and front and side stop limiting is often used. However, the device structure of this method is relatively complex, and corresponding mechanical parts need to be designed and manufactured. These parts need to be accurately machined and adjusted to ensure the accuracy and reliability of the correction, so more manpower and resources need to be invested. SUMMARY

[0004] The main purpose of the embodiments of the present application is to provide a pole piece correction device, a correction method and related apparatus, which can reduce the structural complexity of the correction device.

[0005] To achieve the above-mentioned purpose, a first aspect of the embodiments of the present application provides a pole piece correction device, which comprises:

[0006] a straight roller;

[0007] a speed regulating roller set, which is arranged on one side of the straight roller along a transmission direction, and comprises a first speed regulating roller set and a second speed regulating roller set arranged oppositely; the first speed regulating roller set and the second speed regulating roller set have a first length along the transmission direction; the first speed regulating roller set contacts the pole piece first;

[0008] a driving device, which is used to drive the first speed regulating roller set to rotate at a first speed, and drive the second speed regulating roller set to rotate at a second speed, so that the pole piece moves to a target position via the first speed regulating roller set and the second speed regulating roller set;

[0009] a first image acquisition device, which is arranged above the straight roller and is used to acquire a first position of the pole piece on the straight roller;

[0010] a processor configured to acquire a pole piece profile according to the first position, extract feature points in the pole piece profile, generate a lateral offset of the pole piece according to a difference between initial coordinates of the feature points and standard coordinates, and generate the first speed and the second speed according to the lateral offset and a transmission speed of the straight roller.

[0011] In some embodiments, the processor is configured to generate the lateral offset of the pole piece according to the difference between the initial coordinates of the feature points and the standard coordinates, and generate the first speed and the second speed according to the lateral offset and the transmission speed of the straight roller, including:

[0012] calculating the lateral offset of the pole piece according to coordinates of two end points of a long side inside the pole piece and coordinates of the two end points of the long side inside the pole piece when the pole piece is at a standard position;

[0013] setting the first speed as the transmission speed;

[0014] calculating the second speed according to the lateral offset of the pole piece, the first length and the transmission speed.

[0015] In some embodiments, the processor is configured to calculate the second speed according to the lateral offset of the pole piece, the first length and the transmission speed, including:

[0016] obtaining a first intermediate value according to the lateral offset of the pole piece and the first length;

[0017] calculating a second intermediate value by multiplying the first intermediate value and the transmission speed;

[0018] obtaining the second speed according to a quotient of the second intermediate value and the first length.

[0019] In some embodiments, the processor is configured to acquire the pole piece profile according to the first position and extract the feature points in the pole piece profile, including:

[0020] performing edge detection on the first position to obtain edge pixel information;

[0021] performing binarization on the edge pixel information to obtain a binary edge image;

[0022] acquiring a connected region of the binary edge image, and obtaining the pole piece profile according to the connected region;

[0023] taking two end points of a long side inside the pole piece in the pole piece profile as the feature points to obtain the initial coordinates of the feature points.

[0024] In some embodiments, the pole piece deviation rectifying device further comprises:

[0025] a second image acquisition device arranged above the speed regulating roller set and configured to acquire a second position of the pole piece on the speed regulating roller set;

[0026] The processor is further configured to obtain a second coordinate of the feature point according to the second position, obtain an error angle according to the second coordinate and the standard coordinate, and generate a correction index according to the error angle.

[0027] To achieve the above object, a second aspect of the embodiment of the present application provides a pole piece correction method applied to the pole piece correction device of the first aspect, and the method comprises:

[0028] obtaining an initial position of a pole piece;

[0029] inputting the initial position into a pre-trained pole piece correction model to perform speed prediction, and obtaining a first predicted speed and a second predicted speed;

[0030] driving the first speed regulating roller set to rotate at the first predicted speed and driving the second speed regulating roller set to rotate at the second predicted speed by using the driving device, so that the pole piece moves to a target position via the first speed regulating roller set and the second speed regulating roller set.

[0031] In some embodiments, the training process of the pole piece correction model comprises the following steps:

[0032] obtaining a plurality of pole piece correction data, wherein the pole piece correction data comprises a sample first position, a sample second position, a sample standard position, a sample first speed and a sample second speed;

[0033] calculating a sample correction index according to the sample second position and the sample standard position, obtaining a pole piece correction sample and a corresponding sample label according to the pole piece correction data when the sample correction index is greater than a preset threshold, wherein the pole piece correction sample comprises the sample first position, and the sample label comprises the sample first speed and the sample second speed;

[0034] inputting the sample first position into the pole piece correction model to perform speed prediction, and obtaining a first sample predicted speed and a second sample predicted speed;

[0035] calculating a first loss value according to the sample first speed and the first sample predicted speed, and calculating a second loss value according to the sample second speed and the second sample predicted speed;

[0036] calculating a total loss value according to the first loss value and the second loss value, adjusting a model weight of the pole piece correction model according to the total loss value until a convergence condition is reached, and obtaining the trained pole piece correction model.

[0037] To achieve the above object, a third aspect of embodiments of the present application provides a pole piece deviation correction system, the system comprising: an initial position acquisition module configured to acquire an initial position of a pole piece; a speed prediction module configured to input the initial position into a pre-trained pole piece deviation correction model to perform speed prediction, to obtain a first predicted speed and a second predicted speed; and a deviation correction module configured to drive the first speed regulation roller group to rotate at the first predicted speed and drive the second speed regulation roller group to rotate at the second predicted speed by using the driving device, so that the pole piece moves to a target position via the first speed regulation roller group and the second speed regulation roller group.

[0038] To achieve the above object, a fourth aspect of embodiments of the present application provides an electronic device, the electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the pole piece deviation correction method of the second aspect of embodiments described above or the training method of the pole piece deviation correction model of the second aspect of embodiments when executing the computer program.

[0039] To achieve the above object, a fifth aspect of embodiments of the present application provides a storage medium, the storage medium being a computer readable storage medium, the storage medium storing a computer program, and the computer program implementing the pole piece deviation correction method of the second aspect of embodiments described above or the training method of the pole piece deviation correction model of the second aspect of embodiments when executed by a processor.

[0040] This application proposes an electrode correction device, correction method, and related apparatus, which have the following beneficial effects: The electrode correction device includes a straight roller, a speed-regulating roller group, a drive device, a first image acquisition device, and a processor; the speed-regulating roller group is arranged on one side of the straight roller along the transmission direction, and the speed-regulating roller group includes a first speed-regulating roller group and a second speed-regulating roller group arranged opposite to each other; the processor is used to obtain the electrode contour according to the first position, extract feature points in the electrode contour, and generate the lateral offset of the electrode according to the difference between the initial coordinates and standard coordinates of the feature points; the processor generates the first speed and the second speed according to the lateral offset and the transmission speed of the straight roller. By visually detecting the current electrode position and calculating the lateral offset of the electrode according to the difference between the initial coordinates and standard coordinates of the extracted feature points, the speed values ​​of the first speed-regulating roller group and the second speed-regulating roller group on both sides of the electrode centerline are adjusted to achieve electrode correction, ensuring the positional accuracy of the electrode when reaching the target position, reducing the influence of errors caused by the positional deviation of the electrode, meeting the requirements of positional accuracy and composite efficiency of the composite electrode, and improving the quality and forming efficiency of subsequent cell forming. The electrode correction method, which uses a drive unit to drive the differential speed movement of the speed-regulating roller group, differs from other correction methods such as clamping, collision, and squeezing. This method avoids damage and scratches to the electrodes, ensuring a high pass rate and reducing the structural complexity of the correction equipment. Furthermore, the adoption of an electrode correction model instead of traditional calculation formulas in later stages results in higher correction accuracy and better adjustability. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the electrode correction device in the embodiments of this application;

[0042] Figure 2 This is another schematic diagram of the electrode correction device in the embodiments of this application;

[0043] Figure 3 This is a schematic diagram illustrating the calculation process of the lateral offset of a single electrode before correction in an embodiment of this application.

[0044] Figure 4 A flowchart of the electrode correction method provided in the embodiments of this application;

[0045] Figure 5 This is a flowchart illustrating the training process of the electrode correction model in the electrode correction method provided in this application embodiment.

[0046] Figure 6 This is a schematic diagram of the functional modules of the electrode correction system provided in the embodiments of this application;

[0047] Figure 7 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0048] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0049] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a manner different from the module division in the device or the sequence in the flowchart. The terms "first", "second", etc. in the specification and claims and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0050] 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 the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0051] First, the meanings of several terms involved in the present application are analyzed:

[0052] Polar plate: refers to the positive plate and negative plate in the battery, also known as positive plate and negative plate. They are the key components in the battery, used to store and release electrical energy. The positive plate is a sheet-like structure formed by coating the positive active material on the conductive substrate. Common positive active materials include lithium cobaltate, lithium nickelate, lithium ferrate, etc. During the charging and discharging process of the battery, the positive plate receives electrons and reacts with ions in the electrolyte to store and release electrical energy. The negative plate is a sheet-like structure formed by coating the negative active material on the conductive substrate. The common negative active material is graphite, which has good electrochemical performance and conductivity. During the charging and discharging process of the battery, the negative plate releases electrons and reacts with ions in the electrolyte to store and release electrical energy. The positive plate and the negative plate are usually separated by a separator, and at the same time, there is electrolyte between the positive plate and the negative plate for ion transmission. In the charged state, the potential of the positive plate is higher, and the potential of the negative plate is lower; in the discharged state, the potential of the positive plate is lower, and the potential of the negative plate is higher.

[0053] Cell stacking: refers to the process of stacking multiple battery cells (electrical cores) together in a specific manner to form a complete battery assembly. Cell stacking technology can be used in various types of batteries, including lithium-ion batteries, nickel-hydrogen batteries, etc. In the field of electric vehicles, energy storage systems, etc., cell stacking technology is widely used. The main purpose of cell stacking is to improve the energy density and power density of the battery assembly. By stacking the cells together, the energy storage and output capacity of the battery assembly can be effectively improved, thereby increasing the battery's range and power output.

[0054] Polar plate alignment: refers to the process of adjusting the position and orientation of the polar plate during the manufacturing process to ensure the normal operation and performance stability of the battery. The purpose of polar plate alignment is to ensure that the position and orientation of the polar plate are well aligned with other components such as separators, electrolyte, etc. This is because the position and orientation of the polar plate have a significant impact on the performance of the battery. If the polar plate position is offset or the direction is misaligned, it will cause uneven current flow inside the battery, affecting the output capacity and cycle life of the battery. In the polar plate alignment process, common methods include mechanical alignment and optical alignment. Mechanical alignment usually uses mechanical devices to fine-tune the polar plate to achieve the required position and orientation. Optical alignment uses optical sensors and other devices to detect and feedback the position and orientation information of the polar plate, achieving precise adjustment. Polar plate alignment is an important part of the battery manufacturing process, which can ensure the performance and quality of the battery. Through reasonable polar plate alignment operations, the consistency and stability of the battery can be improved, ensuring the normal operation and long-term reliability of the battery.

[0055] The positive and negative polar plate composite process plays a crucial role in the cell stacking process. Before the polar plate composite, the position accuracy of the positive and negative polar plates has a decisive influence on the composite quality and efficiency. The common method in the prior art is to use inclined roller transmission and front and side limit position to correct the position error of the polar plate. However, when moving the polar plate from the storage device to the transmission device, its position and angle are difficult to determine. When there is an offset angle, the effect of the above correction method will be limited, and a lot of time will be spent on correction. This not only cannot meet the accurate position requirements and high efficiency requirements after composite, but may even cause the polar plate composite to fail, especially when the offset angle is too large. Therefore, there is an urgent need for a more reliable and effective solution to solve this problem and improve the quality and efficiency of the positive and negative polar plate composite process in the cell stacking process.

[0056] Therefore, based on this, the embodiments of the present application provide a polar plate alignment device and method, which can reduce the structural complexity of the alignment device.

[0057] The application embodiment provides an electrode sheet deviation rectifying device and method, which is specifically described through the following embodiments. First, the electrode sheet deviation rectifying device in the application embodiment is described.

[0058] The electrode sheet deviation rectifying device in the application embodiment can be described through the following embodiments.

[0059] Figure 1 FIG. 1 is a schematic diagram of an electrode sheet deviation rectifying device in the application embodiment, Figure 2 FIG. 2 is another schematic diagram of an electrode sheet deviation rectifying device in the application embodiment.

[0060] Reference Figures 1 to 2 The electrode sheet deviation rectifying device comprises:

[0061] A straight roller 20.

[0062] It can be understood that the straight roller 20 is a roller used in metal processing. It is made of metal material and has a cylindrical shape with a smooth surface. The straight roller 20 is widely used in various metal processing processes, such as rolling mill, stretching machine, shearing machine and other processes. In the electrode sheet deviation rectifying device, a group of parallel straight rollers 20 are arranged to roll and transmit the electrode sheet 10 from the initial position to the position for deviation rectification. The distance between the rollers can be adjusted according to the size and weight of the electrode sheet 10. The electrode sheet 10 is placed above the straight roller 20, and then the electrode sheet 10 is rolled and transmitted along the rolling direction of the straight roller 20 by the action of gravity or external force. The surface of the straight roller 20 is usually smooth to reduce friction and ensure smooth transmission of the electrode sheet 10.

[0063] The electrode sheet deviation rectifying device further comprises:

[0064] A speed regulating roller set 30 is arranged on one side of the straight roller 20 along the transmission direction, and the speed regulating roller set 30 comprises a first speed regulating roller set 31 and a second speed regulating roller set 32 arranged oppositely. The length of the first speed regulating roller set 31 and the second speed regulating roller set 32 along the transmission direction is a first length. The first speed regulating roller set 31 contacts the electrode sheet 10 first.

[0065] It should be noted that in each specific embodiment of the application, the speed regulating roller set 30 is a device for controlling the transmission speed of the material, which can adjust the transmission speed of the material by adjusting the rotating speed of the rollers. The speed regulating roller set 30 is composed of a transmission system and rollers. The transmission system transmits power to the rollers to make them rotate. By adjusting the transmission ratio of the transmission system, the rotating speed of the rollers can be changed to adjust the transmission speed of the material. The speed regulating roller set 30 can realize accurate control of the transmission speed of the electrode sheet 10. The speed regulating roller set 30 can be integrated with an automatic control system to realize an automatic material transmission process and improve the intelligent level of the production line.

[0066] It should be noted that the speed regulating roller set 30 includes a first speed regulating roller set 31 and a second speed regulating roller set 32, the first speed regulating roller set 31 rotates at a first speed, and the second speed regulating roller set 32 rotates at a second speed, and the difference between the first speed and the second speed can be used to correct the deviation of the pole piece 10. The first speed regulating roller set 31 and the second speed regulating roller set 32 are arranged opposite to each other on both sides of the center line of the pole piece 10, and the length of the first speed regulating roller set 31 and the second speed regulating roller set 32 along the transmission direction is a first length, which is used to adjust the speed value of the roller set on both sides of the center line of the pole piece 10 to correct the deviation. Since the pole piece 10 has a certain deviation, the first speed regulating roller set 31 first contacts the pole piece 10 during the correction process. The pole piece correction method by driving the speed regulating roller set 30 to move at different speeds is different from other correction methods such as clamping, colliding, and extruding, and will not cause damage and scratches to the pole piece 10, thereby ensuring the qualified rate of the pole piece 10 and bringing higher benefits and reliability to the production process.

[0067] The pole piece correction device further comprises:

[0068] The driving device 40 is used to drive the first speed regulating roller set 31 to rotate at a first speed and drive the second speed regulating roller set 32 to rotate at a second speed, so that the pole piece 10 moves to a target position via the first speed regulating roller set 31 and the second speed regulating roller set 32.

[0069] It can be understood that the driving device 40 refers to a device for providing power and controlling movement, which is composed of motors, transmission systems, and controllers, etc. The core component of the driving device 40 is the motor, which converts electrical energy into mechanical energy to provide power to the equipment or mechanical system. The types of motors include DC motors, AC motors, and stepper motors, etc. The selection of motor type depends on the specific application requirements. The transmission system is used to transmit the rotating force of the motor to the driven device 40, and the transmission methods include gear transmission, belt transmission, chain transmission, etc. The transmission system can adjust the transmission ratio according to the requirements to realize the output of different rotating speeds and torques. The controller is used to control and adjust the operation of the driving device, including circuit boards, control algorithms, and control interfaces, etc. The controller can adjust the speed, direction, and stop of the motor according to the set parameters to realize the precise control of the driving device 40. The selection and design of the driving device 40 need to consider multiple factors, including the load characteristics of the driven equipment, the movement requirements, the environmental conditions, etc. Reasonable selection and configuration of the driving device 40 can ensure the stable operation, efficient work, and safety of the equipment.

[0070] The pole piece correction device further comprises:

[0071] The first image acquisition device 50 is arranged above the straight roller 20 and is used to acquire the first position of the pole piece 10 on the straight roller 20.

[0072] It should be noted that the first image acquisition device 50 refers to a device or sensor for acquiring images or visual information, which can be a digital camera, a video camera or a camera array. According to actual needs, the first image acquisition device 50 adjusts the parameters of the first image acquisition device 50, such as appropriately prolonging the exposure time to increase the time for light to enter the lens, or adjusting the focusing distance to ensure that clear image information of the pole piece 10 can be obtained. The first image acquisition device 50 can work according to the expected effect through a triggering mechanism, trigger the first image acquisition device 50 to collect images, and capture the required high-quality image data. The triggering mechanism includes conditional triggering, which triggers image acquisition according to specific conditions or events; it also includes external triggering, which can trigger image acquisition through communication with external devices (such as sensors or triggers). For example, the first image acquisition device 50 can trigger shooting by receiving the signal of an external sensor.

[0073] In an embodiment, the pole piece deviation correction device further comprises:

[0074] A processor (not shown in the figure) is configured to obtain a pole piece contour according to the first position, extract feature points in the pole piece contour, generate a lateral deviation amount of the pole piece 10 according to a difference between initial coordinates of the feature points and standard coordinates, and generate the first speed and the second speed according to the lateral deviation amount and a transmission speed of the straight roller 20.

[0075] It should be noted that in various specific embodiments of the present application, the processor can be implemented in the form of a general-purpose CPU (Central Processing Unit), a microprocessor, an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits, etc., for executing related programs, extracting feature points in the pole piece contour, and performing necessary calculations in the deviation correction process.

[0076] In some embodiments, the processor generates a lateral deviation amount of the pole piece 10 according to a difference between initial coordinates of the feature points and standard coordinates, and generates the first speed and the second speed according to the lateral deviation amount and a transmission speed of the straight roller 20, including:

[0077] The lateral deviation amount of the pole piece 10 is calculated according to the coordinates of the two end points of the inner long side of the pole piece 10 and the coordinates of the two end points of the inner long side of the pole piece 10 when it is in the standard station; the first speed is set to the transmission speed; and the second speed is calculated according to the lateral deviation amount of the pole piece 10, the first length and the transmission speed.

[0078] The pole piece deviation correction device further comprises:

[0079] The second image acquisition device 60 is arranged above the speed regulating roller set 30 and is used to obtain a second position of the pole piece 10 on the speed regulating roller set 30; the processor is further configured to obtain a second coordinate of the feature point according to the second position, obtain an error angle according to the second coordinate and the standard coordinate, and generate the deviation correction index according to the error angle.

[0080] It can be understood that the image of the second position is obtained, and corresponding image processing is performed to obtain the second coordinate of the feature point. The second coordinate is compared with the standard coordinate to calculate the error angle. The error angle can be calculated by using a trigonometric function, such as a tangent function, according to the horizontal and vertical distances between two coordinate points. The deviation correction index is generated according to the error angle. The deviation correction index can be designed according to actual requirements, which can be a numerical value or a state flag indicating the degree of deviation or the direction of deviation correction.

[0081] Reference Figure 3 In various specific embodiments of the present application, the two end point coordinates of the inner long side of the pole piece are A and B, respectively, the two end point coordinates of the inner long side of the pole piece at the standard station are C and D, respectively, and the transverse deviation amount of the pole piece is the length of BE. The transverse deviation amount is calculated according to the two end point coordinates of the inner long side of the pole piece, so that the two end points of the inner long side of the pole piece are on the same vertical line when the pole piece reaches the target position, thereby improving the efficiency and quality of the pole piece compounding.

[0082] In some embodiments, the second speed is calculated according to the transverse deviation amount, the first length, and the transmission speed, including:

[0083] A first intermediate value is obtained according to the transverse deviation amount and the first length of the pole piece; a second intermediate value is obtained by calculating the product of the first intermediate value and the transmission speed; and the second speed is obtained according to the quotient of the second intermediate value and the first length.

[0084] The transverse deviation amount of the pole piece is denoted as L1, the length of the first speed regulating roller set and the second speed regulating roller set along the transmission direction is denoted as the first length, and denoted as L2. The transmission speed is denoted as V. The first speed is denoted as V1, which is set as the transmission speed V of the straight roller, i.e., V1=V. The second speed is denoted as V2, i.e., V2=V1×(L1+L2) / L2.

[0085] It can be understood that the first speed is the speed of the first speed regulating roller set, the first length is the length of the first speed regulating roller set and the second speed regulating roller set along the transmission direction, and the transmission speed is the transmission speed of the straight roller. The speed of the first speed regulating roller set is set as the transmission speed of the straight roller, i.e., the first speed is set as the transmission speed.

[0086] In some embodiments, the pole piece contour is obtained according to the first position, and the feature point in the pole piece contour is extracted, including:

[0087] Edge detection is performed on the first position to obtain edge pixel information; the edge pixel information is binarized to obtain a binary edge image; the connected regions of the binary edge image are obtained, and the electrode contour is obtained based on the connected regions; the two endpoints of the inner long side of the electrode in the electrode contour are taken as feature points to obtain the initial coordinates of the feature points.

[0088] It is understandable that edge detection can be performed on the image at the first position using edge detection algorithms, such as the Canny algorithm or the Sobel algorithm, to extract edge information from the image. The edge pixel information is then binarized, with edge pixels set to 1 and non-edge pixels set to 0, resulting in a binary edge image. Connectivity analysis is then performed on the binary edge image to identify different connected regions, and the polarimetric contour is obtained based on these connected regions.

[0089] The electrode correction device in this embodiment obtains the coordinate information of feature points through the first image acquisition device and drives the differential speed movement of the speed regulating roller group to perform correction. Unlike other correction methods such as clamping, collision, and squeezing, it does not require the design and manufacture of corresponding mechanical parts that require precise processing, nor does it require complex components such as front and side guards, thus reducing the structural complexity of the correction device.

[0090] The electrode correction method in this application can be illustrated through the following embodiments.

[0091] Figure 4 This is an optional flowchart of the electrode correction method provided in the embodiments of this application. Figure 4 The method may include, but is not limited to, steps S410 to S430.

[0092] Step S410: Obtain the initial position of the electrode.

[0093] Step S420: Input the initial position into the pre-trained electrode correction model to predict the velocity, and obtain the first predicted velocity and the second predicted velocity.

[0094] Step S430: Drive the first speed-regulating roller group to rotate at a first predicted speed and drive the second speed-regulating roller group to rotate at a second predicted speed using a drive device, so that the electrode sheet moves to the target position via the first speed-regulating roller group and the second speed-regulating roller group.

[0095] Understandably, the electrode correction model can be a convolutional neural network model, a recurrent neural network model, or other models, and can be constructed according to different needs and algorithm principles. The first predicted speed output by the electrode correction model is the speed at which the drive device drives the first speed-regulating roller group, and the second predicted speed output by the electrode correction model is the speed at which the drive device drives the second speed-regulating roller group.

[0096] Please see Figure 5In some embodiments, the training process of the pole piece deviation correction model includes, but is not limited to, the following steps S510 to S550:

[0097] Step S510: Obtain a plurality of pole piece deviation correction data, the pole piece deviation correction data including: a sample first position, a sample second position, a sample standard position, a sample first speed, and a sample second speed.

[0098] Step S520: Calculate a sample deviation correction index according to the sample second position and the sample standard position, and when the sample deviation correction index is greater than a preset threshold, obtain a pole piece deviation correction sample and a corresponding sample label according to the pole piece deviation correction data; the pole piece deviation correction sample includes the sample first position, and the sample label includes: the sample first speed and the sample second speed.

[0099] Step S530: Input the sample first position into the pole piece deviation correction model to perform speed prediction, and obtain a first sample predicted speed and a second sample predicted speed.

[0100] Step S540: Calculate a first loss value according to the sample first speed and the first sample predicted speed, and calculate a second loss value according to the sample second speed and the second sample predicted speed.

[0101] Step S550: Calculate a total loss value according to the first loss value and the second loss value, and adjust a model weight of the pole piece deviation correction model according to the total loss value until a convergence condition is reached, to obtain a trained pole piece deviation correction model.

[0102] It can be understood that the sample deviation correction index is an evaluation index after the sample is corrected, and when the sample deviation correction index is greater than the preset threshold, the pole piece deviation correction sample and the corresponding sample label are obtained according to the pole piece deviation correction data, which can help to ensure the effectiveness of the model training data, reduce the noise and bias in the training data, improve the accuracy and generalization ability of the model, and improve the training effect of the model.

[0103] It can be understood that the first loss value is calculated according to the sample first speed and the first sample predicted speed, and the second loss value is calculated according to the sample second speed and the second sample predicted speed, the calculation of the first loss value can evaluate the prediction accuracy of the model for the first sample, and the calculation of the second loss value can evaluate the prediction accuracy of the model for the second sample, and the smaller the loss value is, the more accurate the prediction of the model is.

[0104] It can be understood that to calculate the total loss value, the first loss value and the second loss value can be weighted and summed. Assuming that the first loss value is Loss1, the second loss value is Loss2, and the weights are w1 and w2, the total loss value can be calculated as TotalLoss = w1 x Loss1 + w2 x Loss2. The weights w1 and w2 can be adjusted according to actual conditions. The purpose of adjusting the weights is to balance the influence degree of the first loss value and the second loss value on the total loss value. The selection of weights can be based on experience or determined by trial and optimization. Adjusting the model weights of the pole piece correction model can be achieved using optimization algorithms, common optimization algorithms include gradient descent method and Adam, etc. The goal of the optimization algorithm is to minimize the total loss value or reach the convergence condition by adjusting the model weights. The convergence condition can be determined according to actual needs, for example, when the change of the total loss value is less than a certain threshold or reaches a certain number of training rounds, it is considered that the model has converged.

[0105] In a specific embodiment, the pole piece is moved to the straight roller by the pole piece storage device for transmission, the transmission speed of the straight roller is denoted as V, the first image acquisition device is installed above the straight roller, after receiving the in-place signal, the first image acquisition device acquires the image of the current position of the pole piece, identifies the pole piece contour in the image, captures the coordinates of two feature points in the identified pole piece contour, the two feature points are the two end points of the inner long side of the pole piece, uploads the initial pole piece contour information to the database storage, and at the same time stores the feature point coordinates of the pole piece in the standard position in the database. According to the two feature point coordinates of the current pole piece position and the two feature point coordinates of the pole piece in the standard position, the pole piece transverse offset L1 is calculated.

[0106] The pole piece is transmitted to the speed regulation roller set for correction, the length of the first speed regulation roller set and the second speed regulation roller set along the transmission direction is a first length, denoted as L2. The first speed of the first speed regulation roller set is denoted as V1, and the second speed of the second speed regulation roller set is denoted as V2. The first speed regulation roller set first contacts one side of the pole piece, and the first speed V1 is set as the transmission speed V of the straight roller, i.e. V1 = V. The second speed V2 of the second speed regulation roller set is calculated from the pole piece transverse offset L1, the first length L2 and the first speed V1, so that the two end points of the inner long side of the pole piece reach the same vertical horizontal line when the pole piece reaches the target position, i.e. V2 = V1 x (L1 + L2) / L2. The driving device adjusts the speed of the first speed regulation roller set to V1 and adjusts the speed of the second speed regulation roller set to V2, thereby completing the correction of the pole piece on the transmission device.

[0107] The second image acquisition device detects the image information of the second position after the electrode sheet, compares it with standard coordinates, provides feedback on the correction effect, and uploads the data to the database for storage. A deep learning correction model is built, trained using data from the database, and the necessary parameters for model building are obtained, thus yielding the correction model. The model input is the initial coordinates of the electrode sheet, and the output is the first and second velocities, gradually replacing the fixed calculation formula for adjusting the roller speed.

[0108] By visually detecting the current electrode position and calculating the lateral offset of the electrode based on its standard coordinates, the speed values ​​of the first and second speed-regulating roller groups on both sides of the electrode's centerline are adjusted to correct the electrode's misalignment. This ensures the electrode's positional accuracy before entering the correction mechanism, reduces errors caused by positional deviations, and improves the quality and efficiency of subsequent cell forming. Unlike other correction methods such as clamping, collision, or squeezing, this differential speed driving method avoids damage and scratches to the electrode, ensuring a high yield rate. Furthermore, a deep learning-based correction model replaces traditional calculation formulas, resulting in higher accuracy and better adjustability in electrode correction.

[0109] Please see Figure 6 This application also provides an electrode correction system that can implement the above-described electrode correction method. The electrode correction system includes:

[0110] The initial position acquisition module 610 is used to acquire the initial position of the electrode.

[0111] The velocity prediction module 620 is used to input the initial position into the pre-trained electrode correction model to predict the velocity, and obtain the first predicted velocity and the second predicted velocity.

[0112] The correction module 630 is used to drive the first speed-regulating roller group to rotate at a first predicted speed and drive the second speed-regulating roller group to rotate at a second predicted speed, so that the electrode sheet moves to the target position via the first speed-regulating roller group and the second speed-regulating roller group.

[0113] For example, the electrode correction system can execute the above electrode correction method. In the process of executing the electrode correction method, it is necessary to obtain the initial position of the electrode.

[0114] The electrode correction system executes an electrode correction method by using a drive device to drive a first speed-regulating roller group to rotate at a first predicted speed and a second speed-regulating roller group to rotate at a second predicted speed, so that the electrode moves to the target position via the first and second speed-regulating roller groups. Therefore, this application can reduce the structural complexity of the correction equipment.

[0115] The specific implementation of the pole piece correction system is basically the same as the specific embodiments of the pole piece correction method described above, and will not be repeated here. The pole piece correction system can also be provided with other functional modules to implement the pole piece correction method in the above embodiments, as long as the requirements of the embodiments of the present application are met.

[0116] The embodiments of the present application also provide an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor implements the pole piece correction method or the training method of the pole piece correction model when executing the computer program. The electronic device can be any intelligent terminal, such as a tablet computer or a vehicle-mounted computer.

[0117] Please refer to Figure 7 , Figure 7 The hardware structure of the electronic device of another embodiment is illustrated, which includes:

[0118] The processor 710 can be implemented in the form of a general-purpose CPU (Central Processing Unit), a microprocessor, an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits, and is used to execute related programs to implement the technical solutions provided by the embodiments of the present application.

[0119] The memory 720 can be implemented in the form of a ROM (ReadOnly Memory), a static storage device, a dynamic storage device, or a RAM (Random Access Memory). The memory 720 can store an operating system and other application programs. When the technical solutions provided by the embodiments of the present application are implemented by software or firmware, the related program codes are saved in the memory 720 and are called and executed by the processor 710 to implement the pole piece correction method or the training method of the pole piece correction model of the embodiments of the present application.

[0120] The input / output interface 730 is used to realize information input and output.

[0121] The communication interface 740 is used to realize the communication interaction between the device and other devices. The communication can be realized by a wired manner (such as a USB, a network cable, etc.) or a wireless manner (such as a mobile network, a WI-FI, a Bluetooth, etc.).

[0122] The bus 750 transmits information between various components (such as the processor 710, the memory 720, the input / output interface 730, and the communication interface 740) of the device.

[0123] The processor 710, the memory 720, the input / output interface 730, and the communication interface 740 are communicatively connected with each other through a bus 750.

[0124] The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the pole piece correction method or the training method of the pole piece correction model.

[0125] The memory, as a non-transitory computer readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory can optionally include a memory remotely arranged relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0126] The embodiments described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0127] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and can include more or fewer steps than the figures shown, or combine certain steps, or different steps.

[0128] The device embodiments described above are only schematic, and the units described as separate components can or can not be physically separated, that is, they can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0129] Those skilled in the art can understand that all or some steps in the above disclosed method, the function modules / units in the system and the device can be implemented as software, firmware, hardware and their appropriate combinations.

[0130] The terms "first", "second", "third", "fourth", and the like in the description and in the claims of this application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of orderly or chronological mundane operation, reverse order operation, based on circuitry availability, based on stated preference or the like, and that "default" or other orderings are thus permissible. Further, the terms "comprise", "comprising", "include", "including", and the like, are specifically intended to be open-ended. That is, references to individual steps and the like do not suhstantially exclude the presence of two or more of a recited step or its integral sub-steps or additional steps whether or not readily ascertainable from the description or the like. Further, the words "a" or "an", as used herein in the disclosure and elsewhere, are used indiscriminately and are to be interpreted in the same way, i.e. as meaning "one or more".

[0131] It should be understood that, in the application, "at least one" and "several" refer to one or more, and "multiple" refers to two or more. "And / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0132] In several embodiments provided in the application, it should be understood that the disclosed system and method can be implemented in other ways. For example, the above-described system embodiments are only illustrative, for example, the division of the above-mentioned units is only a logical functional division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed objects can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0133] The units described above as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0134] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0135] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in part, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes multiple instructions used to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various other media that can store programs.

[0136] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings, and are not intended to limit the scope of the embodiments of the present application. Any modifications, equivalent replacements and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of the embodiments of the present application.

Claims

1. A method for correcting electrode polarization, characterized in that, This invention relates to an electrode alignment device, which includes a straight roller and a speed-regulating roller group. The speed-regulating roller group is disposed on one side of the straight roller along the transmission direction. The speed-regulating roller group includes a first speed-regulating roller group and a second speed-regulating roller group disposed opposite to each other. The lengths of the first speed-regulating roller group and the second speed-regulating roller group along the transmission direction are a first length. The first speed-regulating roller group contacts the electrode first. A driving device is used to drive the first speed-regulating roller group to rotate at a first speed and drive the second speed-regulating roller group to rotate at a second speed, so that the electrode sheet is moved to the target position via the first speed-regulating roller group and the second speed-regulating roller group. The electrode correction method includes: Obtain the initial position of the electrode; The initial position is input into a pre-trained electrode correction model to predict the velocity, resulting in a first predicted velocity and a second predicted velocity. The first speed-regulating roller group is driven to rotate at the first predicted speed by the driving device, and the second speed-regulating roller group is driven to rotate at the second predicted speed, so that the electrode sheet is moved to the target position via the first speed-regulating roller group and the second speed-regulating roller group. The training process of the electrode correction model includes the following steps: Acquire multiple electrode correction data, the electrode correction data including: sample first position, sample second position, sample standard position corresponding to each electrode, label first speed of the first speed regulating roller group and label second speed of the second speed regulating roller group; The sample correction index is calculated based on the second position of the sample and the standard position of the sample. When the sample correction index is greater than a preset threshold, the electrode correction sample and the corresponding sample label are obtained based on the electrode correction data. The electrode correction sample includes the first position of the sample, and the sample label includes the first velocity of the sample and the second velocity of the sample. The sample correction index is used to characterize the positional error between the second position of the sample and the standard position of the sample. The first position of the sample is input into the electrode correction model to predict the speed, thereby obtaining the first sample predicted speed of the first speed regulating roller group and the second sample predicted speed of the second speed regulating roller group. A first loss value is calculated based on the first speed of the label and the first sample prediction speed, and a second loss value is calculated based on the second speed of the label and the second sample prediction speed; The total loss value is calculated based on the first loss value and the second loss value, and the model weights of the electrode correction model are adjusted according to the total loss value until the convergence condition is met, thus obtaining the trained electrode correction model.

2. An electrode alignment device, characterized in that, The electrode alignment device is used to implement the electrode alignment method according to claim 1, and the electrode alignment device includes: straight roller; A speed-regulating roller assembly is disposed on one side of the straight roller along the transmission direction. The speed-regulating roller assembly includes a first speed-regulating roller assembly and a second speed-regulating roller assembly disposed opposite to each other. The lengths of the first speed-regulating roller assembly and the second speed-regulating roller assembly along the transmission direction are a first length. The first speed-regulating roller assembly contacts the electrode sheet first. A driving device is used to drive the first speed-regulating roller group to rotate at a first speed and drive the second speed-regulating roller group to rotate at a second speed, so that the electrode sheet is moved to the target position via the first speed-regulating roller group and the second speed-regulating roller group. A first image acquisition device is disposed above the straight roller and is used to acquire the first position of the electrode sheet on the straight roller; The processor is configured to obtain the electrode profile based on the first position, extract feature points from the electrode profile, generate the lateral offset of the electrode based on the difference between the initial coordinates and the standard coordinates of the feature points, and generate the first speed and the second speed based on the lateral offset and the transmission speed of the straight roller. The second image acquisition device is disposed above the speed-regulating roller group and is used to acquire the second position of the electrode on the speed-regulating roller group; The processor is further configured to obtain the second coordinates of the feature point based on the second position, obtain the error angle based on the second coordinates and the standard coordinates, and generate a correction index based on the error angle.

3. The electrode alignment device according to claim 2, characterized in that, The lateral offset of the electrode is generated based on the difference between the initial coordinates and the standard coordinates of the feature points. Generating the first speed and the second speed based on the lateral offset and the conveying speed of the straight roller includes: The lateral offset of the electrode is calculated based on the coordinates of the two endpoints of the inner long side of the electrode and the coordinates of the two endpoints of the inner long side of the electrode when it is in the standard position. Set the first speed as the transmission speed; The second speed is calculated based on the lateral offset of the electrode, the first length, and the transmission speed.

4. The electrode alignment device according to claim 3, characterized in that, The calculation of the second speed based on the lateral offset of the electrode, the first length, and the transmission speed includes: A first intermediate value is obtained based on the lateral offset of the electrode and the first length; The second intermediate value is obtained by multiplying the first intermediate value by the transmission speed; The second speed is obtained by dividing the second intermediate value by the first length.

5. The electrode alignment device according to claim 2, characterized in that, The step of obtaining the electrode contour based on the first position and extracting feature points from the electrode contour includes: Edge detection is performed on the first position to obtain edge pixel information; The edge pixel information is binarized to obtain a binary edge image; Obtain the connected regions of the binary edge image, and obtain the pole piece contour based on the connected regions; The initial coordinates of the feature points are obtained by taking the two endpoints of the inner long side of the electrode in the electrode profile as the feature points.

6. An electronic device, characterized in that, The electronic device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the electrode correction method of claim 1.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the electrode correction method of claim 1.

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