Electrode sheet skew correction method, device, equipment, storage medium and product

Abstract

This application discloses an electrode sheet skew correction method, device, equipment, storage medium and product. The electrode sheet skew correction method includes: collecting skew data of the edge of the electrode sheet relative to a preset boundary by a sensor; determining a skew correction displacement of the electrode sheet based on the skew data; and controlling a payout device of the electrode sheet to adjust the position of the electrode sheet based on the skew correction displacement so that the skew data of the electrode sheet relative to the preset boundary is within a target range. According to the embodiment of this application, the problem that the skew of the electrode sheet cannot be corrected in a timely manner and affects the product quality of the battery can be solved.

Description

[Technical field]

[0001] The present application relates to the field of battery manufacturing technology, and in particular to an electrode sheet skew correction method, device, equipment, storage medium and product. [Background technology]

[0002] With the development of science and technology, the application of batteries in daily production is becoming more and more widespread. In the battery production process, the rolled electrode sheet can be unwound to transport the electrode sheet to downstream battery processing equipment.

[0003] However, during the unwinding process, the electrode sheet is often prone to skew, and if the conveying position of the electrode sheet is not corrected in a timely manner, the electrode sheet is likely to wrinkle or break, which will affect the product quality of the battery. Summary of the Invention

[0004] In view of the above problems, the present application provides an electrode sheet skew correction method, device, equipment, storage medium and product that can solve the problem of not being able to correct the skew of the electrode sheet in a timely manner, which ultimately affects the quality of battery products.

[0005] In a first aspect, the present application provides an electrode sheet skew correction method, the method comprising: collecting skew data of an edge of the electrode sheet relative to a preset boundary by a sensor; determining a skew correction displacement of the electrode sheet based on the skew data; and controlling a payout device for the electrode sheet based on the skew correction displacement to adjust a position of the electrode sheet so that skew data of the electrode sheet relative to the preset boundary falls within a target range.

[0006] In an embodiment of the present application, after collecting skew data of the edge of the electrode sheet relative to a preset boundary by a sensor, corresponding data processing is then performed on the skew data to quickly identify the skew correction displacement of the electrode sheet, and based on the skew correction displacement in a timely manner, the electrode sheet payout device is controlled to adjust the position of the electrode sheet so that the skew data of the electrode sheet relative to the preset boundary is within a target range, thereby preventing the electrode sheet from wrinkling or being damaged during transport.

[0007] In some embodiments, the number of sensors is at least two, and the skew data includes a plurality of first skew data and a plurality of second skew data, and collecting skew data of the edge of the electrode sheet relative to the preset boundary by the sensors includes: collecting, by at least one sensor, a plurality of first skew data of a first edge of the electrode sheet relative to a first preset boundary; and collecting, by at least another sensor, a third plurality of skew data of a second edge of the electroded sheet relative to a second preset boundary, the second edge of the electroded sheet including a tab; The plurality of third skew data are screened based on the width of the tab to obtain a plurality of second skew data.

[0008] In the embodiment of the present application, at least two sensors are used to obtain skew data of the edges of the electrode sheet, respectively, thereby improving the accuracy of the skew correction displacement. Each sensor can be mounted on a slide rail, so that the position of the sensor can be easily adjusted according to the needs of different widths of the electrode sheet roll, improving convenience. If the data collected by the sensor includes a tab, the collected third skew data can be screened based on the width of the tab to obtain the second skew data, thereby improving the reliability of the data for calculating the skew correction displacement.

[0009] In certain embodiments, screening the plurality of third skew data based on the width of the tab to obtain the plurality of second skew data includes: Identifying a target skew range based on a width of the tab; and removing the third skew data that is within the target skew range to obtain a plurality of second skew data.

[0010] In the embodiment of the present application, the target skew range is determined by the width of the tab, which can improve the accuracy of data screening, improve the calculation accuracy of the skew correction displacement, and avoid affecting the electrical performance of the electrode assembly.

[0011] In some embodiments, determining a skew correction displacement of the electroded sheet based on the skew data comprises: A skew correction displacement of the electrode sheet is determined based on a preset proportional-integral-derivative function and the skew data.

[0012] In an embodiment of the present application, by inputting a preset proportional, integral and differential function for the skew data collected within a collection period, the skew correction displacement can be quickly calculated, the movement of the payout device can be easily controlled, and wrinkles and damage to the electrode sheet can be avoided.

[0013] In a second aspect, the present application provides an electrode sheet skew correction apparatus, the apparatus comprising: a collection module for collecting skew data of the edge of the electrode sheet relative to a preset boundary by a sensor; a processing module that determines a skew correction displacement of the electrode sheet based on the skew data; and a control module that controls the electrode sheet payout device to adjust the position of the electrode sheet based on the skew correction displacement so that skew data of the electrode sheet relative to a preset boundary falls within a target range.

[0014] In an embodiment of the present application, after collecting skew data of the edge of the electrode sheet relative to a preset boundary by a sensor, corresponding data processing is then performed on the skew data to quickly identify the skew correction displacement of the electrode sheet, and based on the skew correction displacement in a timely manner, the electrode sheet payout device is controlled to adjust the position of the electrode sheet so that the skew data of the electrode sheet relative to the preset boundary is within a target range, thereby preventing the electrode sheet from wrinkling or being damaged during transport.

[0015] In some embodiments, the number of sensors is at least two, and the skew data includes a plurality of first skew data and a plurality of second skew data; The acquisition module further includes acquiring, by at least one sensor, a plurality of first skew data of a first edge of the electrode sheet relative to a first preset boundary; The acquisition module further acquires a third plurality of skew data of a second edge of the electroded sheet relative to a second preset boundary by at least another of the sensors, the second edge of the electroded sheet including a tab; The processing module further screens the plurality of third skew data based on the width of the tab to obtain a plurality of second skew data.

[0016] In the embodiment of the present application, at least two sensors are used to obtain skew data of the edges of the electrode sheet, respectively, thereby improving the accuracy of the skew correction displacement. Each sensor can be mounted on a slide rail, so that the position of the sensor can be easily adjusted according to the needs of different widths of the electrode sheet roll, improving convenience. If the data collected by the sensor includes a tab, the collected third skew data can be screened based on the width of the tab to obtain the second skew data, thereby improving the reliability of the data for calculating the skew correction displacement.

[0017] In some embodiments, the collection module further determines a target skew range based on a width of the tab; The acquisition module further removes third skew data that is within the target skew range to obtain a plurality of second skew data.

[0018] In the embodiment of the present application, the target skew range is determined by the width of the tab, which can improve the accuracy of data screening, improve the calculation accuracy of the skew correction displacement, and avoid affecting the electrical performance of the electrode assembly.

[0019] In some embodiments, the processing module further determines a skew correction displacement of the electrode sheet based on a preset proportional-integral-derivative function and the skew data.

[0020] In an embodiment of the present application, by inputting a preset proportional, integral and differential function for the skew data collected within a collection period, the skew correction displacement can be quickly calculated, the movement of the payout device can be easily controlled, and wrinkles and damage to the electrode sheet can be avoided.

[0021] In a third aspect, an embodiment of the present application provides an electrode sheet skew correction device including a processor, a memory, and a program or instructions stored in the memory and executable by the processor, the program or instructions, when executed by the processor, achieving steps of the method of the first aspect.

[0022] In a fourth aspect, an embodiment of the present application provides a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implements the steps of the method according to the first aspect.

[0023] In a fifth aspect, an embodiment of the present application provides a computer program product, the instructions in the computer program product, when executed by a processor of an electronic device, causing the electronic device to perform steps of the method of the first aspect.

[0024] The above description is only an outline of the technical solution of the present application, which can be implemented according to the contents of the specification in order to more clearly understand the technical means of the present application, and in order to more clearly understand the above and other objectives, features and advantages of the present application, the specific embodiments of the present application are described in detail below. [Brief description of the drawings]

[0025] Various other advantages will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating the preferred embodiments and are not intended to limit the present application. In the drawings, the same elements are designated by the same reference numerals.

[0026] [Figure 1] 4 is a flowchart of an electrode sheet skew correction method in battery detection according to an embodiment of the present application.

[0027] [Diagram 2] FIG. 2 is a schematic diagram of an electrode sheet substrate according to an embodiment of the present application.

[0028] [Diagram 3] 1 is a schematic diagram of an electrode sheet skew correction system according to an embodiment of the present application;

[0029] [Figure 4] 1 is a structural schematic diagram of an electrode sheet skew correction device according to an embodiment of the present application.

[0030] [Diagram 5] 2 is a schematic diagram of the hardware structure of an electrode sheet skew correction device according to an embodiment of the present application; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Hereinafter, the embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following examples are only for the purpose of more clearly illustrating the technical solution of the present application, and therefore are merely examples and cannot limit the protection scope of the present application.

[0032] All technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art unless otherwise defined, and the terms used herein are merely for describing specific examples and are not intended to limit the present application. The terms "including" and "having" and any variations thereof in the specification, claims and above description of the drawings of this application are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of the present application, technical terms such as "first", "second", etc. are used only to distinguish different objects, and should not be understood as indicating or implying relative importance, or implying the number, specific order, or hierarchical relationship of the indicated technical features. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specified.

[0034] An "embodiment" referred to in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The phrases appearing in each location in the specification are not necessarily the same embodiment, nor are they exclusive independent or alternative embodiments with other embodiments. Those skilled in the art can combine the embodiments described in this specification with other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described in this specification can be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is a relation describing related objects, and indicates that three types of relations may exist, for example, A and / or B may indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in this specification, the symbol " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0036] In describing the embodiments of the present application, the term "plurality" refers to two or more (including two); similarly, "multiple sets" refers to two or more sets (including two sets); and "multiple sheets" refers to two or more sheets (including two sheets).

[0037] At present, with the development of science and technology, the application of batteries in daily production and life is becoming more and more widespread. For example, batteries are not only widely used in energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but also in electric mobility such as electric bicycles, electric motorcycles and electric cars, as well as in military equipment, aerospace and other fields. As the application fields of batteries expand, the market demand also continues to expand.

[0038] The battery referred to in the embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. The battery generally includes a housing for sealing one or more battery cells. The housing can prevent liquids and other foreign objects from affecting the charging and discharging of the battery cells.

[0039] In the present application, the battery cells may include, but are not limited to, lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells, magnesium ion battery cells, etc. The battery cells may be cylindrical, flat, rectangular, or other shapes, but are not limited to, in the present application.

[0040] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. Here, the electrode assembly includes, for example, a wound type, a stacked type electrode assembly, and the like.

[0041] For example, in the manufacturing process of a wound electrode assembly, the electrode sheet roll includes a positive electrode sheet roll and a negative electrode sheet roll, where the positive electrode sheet roll and the negative electrode sheet roll are aligned with each other and wound into an electrode assembly. If the positive electrode sheet and the negative electrode sheet are not aligned with each other, it not only affects the appearance but also the quality of the wound electrode assembly. In addition, for example, in the manufacturing process of a stacked electrode assembly, the electrode sheet roll needs to be divided into single unit pieces in order to easily form a stacked mold by stacking them, and the electrode sheet roll needs to enter a cutting mechanism to be cut and prepared after being unwound. In the process of unwinding the electrode sheet roll, skew is likely to occur, which makes it difficult to ensure the accuracy of the electrode sheet after cutting by the cutting mechanism, which affects the quality of the subsequent finished stacked lithium battery.

[0042] The inventors noticed that during the process of unwinding the electrode sheet roll, it is often easy for the electrode sheet to become skewed, and if the transport position of the electrode sheet is not corrected in a timely manner, the electrode sheet is likely to become wrinkled or damaged, which will affect the product quality of the battery.

[0043] In order to timely correct the skew of the electrode sheet and avoid affecting the quality of the battery, an embodiment of the present application provides an electrode sheet skew correction method, in which a sensor collects skew data of the edge of the electrode sheet relative to a preset boundary, and then performs corresponding data processing on the skew data to quickly determine the skew correction displacement of the electrode sheet, and based on the skew correction displacement, a payout device for the electrode sheet is controlled to adjust the position of the electrode sheet so that the skew data of the electrode sheet relative to the preset boundary is within a target range, thereby avoiding the electrode sheet from being wrinkled or damaged during the transport of the electrode sheet.

[0044] Hereinafter, the electrode sheet skew correction method according to the embodiment of the present application will be described in detail with reference to the drawings based on specific examples and application scenes.

[0045] As shown in FIG. 1, an embodiment of the present application provides a flowchart of an electrode sheet skew correction method, and as shown in FIG. 1, the method can include the following steps 110 to 130.

[0046] In step 110, the sensor collects skew data of the edge of the electroded sheet relative to a preset boundary.

[0047] In step 120, a skew correction displacement of the electroded sheet is determined based on the skew data.

[0048] In step 130, a payout device of the electrode sheet is controlled to adjust a position of the electrode sheet based on the skew correction displacement so that the skew data of the electrode sheet relative to the preset boundary is within a target range.

[0049] In the above step 110, the electrode assembly is an important component of the battery cell. The electrode assembly may include an electrode sheet and a separator, etc. Specifically, the electrode sheet may include a positive electrode sheet and a negative electrode sheet, and the separator is an insulator interposed between the positive electrode sheet and the negative electrode sheet.

[0050] In the manufacturing process of the electrode assembly, the original roll of the electrode sheet is usually in the form of a roll. For example, the unwinding device can unwind and unwind the original roll of the electrode sheet to transport the electrode sheet to a downstream processing device. Here, the unwinding device may be a component part of the battery processing device, or may be separate from the battery processing device. The unwinding device may include a roller shaft, and the original roll of the electrode sheet may be attached to the roller shaft, and the rotation of the roller shaft can be controlled to realize the unwinding of the original roll of the electrode sheet and the transport to the downstream battery processing device. Here, the battery processing device may be, for example, a winding device for producing a wound electrode assembly, and the battery processing device may be, for example, a cutting device for producing a stacked battery, and is not particularly limited here.

[0051] In some embodiments, the number of sensors may be one or more, the sensor may be located at an edge of the electrode sheet original roll, and the sensor may detect skew data of the edge of the original roll during the running of the electrode sheet original roll. The sensor may be attached to a slide rail, and the sensor may move on the slide rail. Exemplarily, the movement direction of the sensor may be a direction perpendicular to the running direction of the electrode sheet original roll. In this way, the position of the sensor can be adaptively adjusted to accommodate various different specifications of electrode sheet original rolls in response to different width requirements of electrode sheets of different battery assemblies.

[0052] As a specific example, the sensor may be, for example, an optical fiber sensor, and the optical fiber sensor can quickly detect the position of the edge of the electrode sheet roll. Specifically, the sensor performs collection multiple times within a preset period, and obtains collected data of the positions of the edges of multiple electrode sheet rolls, thereby identifying skew data during the running process of the sheet roll. Exemplarily, the collection period of the sensor may be, for example, 2 ms.

[0053] In the process of collecting data by the sensor, the position of the edge of the electrode sheet roll can be obtained each time the data is collected. In the embodiment of the present application, the preset boundary may be, for example, the position of the edge of the electrode sheet that is first collected in one data collection period, or, for example, the preset boundary may be a reference edge that is preset in the payout device, or, for example, the preset boundary may be the position of the edge of the electrode sheet roll that is previously collected, or the like, and the preset boundary may be specifically set according to actual usage needs, and is not specifically limited herein.

[0054] In the above step 120, the number of skew data may be one or more. For example, the sensor collects data multiple times within a preset period, and the position of the edge of the electrode sheet roll can be obtained in each collection. Taking the preset boundary as an example of the position of the edge of the electrode sheet collected for the first time within one data collection period, the skew data of the sheet roll can be identified based on the position of the edge of the electrode sheet collected for the first time within one data collection period and the position of the edge of the electrode sheet collected in real time within the collection period. The preset boundary is the position of the edge of the sheet roll collected last time, and the skew data of the sheet roll can be identified by collecting data two times adjacent to each other.

[0055] In the embodiment of the present application, after obtaining the skew data, a skew correction displacement can be obtained by performing data calculation according to a preset algorithm. The preset algorithm can be specifically set according to the amount of skew data and the actual use needs of a specific application.

[0056] The skew correction displacement may specifically include a distance in a direction in which the electrode sheet original needs to move, for example, the electrode sheet original can move along a first direction or a second direction perpendicular to the running direction of the original, the first direction and the second direction being opposite.

[0057] After obtaining the skew correction displacement, an embodiment of the present application may perform step 130 .

[0058] In step 130, a payout device of the electrode sheet is controlled to adjust a position of the electrode sheet based on the skew correction displacement so that the skew data of the electrode sheet relative to the preset boundary is within a target range.

[0059] In the above step 130, the electrode sheet unwinding device can be moved based on the skew correction displacement to adjust the position of the electrode sheet. Exemplarily, the unwinding device can be connected to a slide table module, the slide table module includes a slide rail, and the unwinding device can be moved along the slide rail. In this way, the position of the electrode sheet can be adjusted by controlling the unwinding device based on the skew correction displacement.

[0060] In an embodiment of the present application, after collecting skew data of the edge of the electrode sheet relative to a preset boundary by a sensor, corresponding data processing is then performed on the skew data to quickly identify the skew correction displacement of the electrode sheet, and based on the skew correction displacement in a timely manner, the electrode sheet payout device is controlled to adjust the position of the electrode sheet so that the skew data of the electrode sheet relative to the preset boundary is within a target range, thereby avoiding the electrode sheet from being wrinkled or damaged during transport.

[0061] In some embodiments of the present application, the number of sensors is at least two, and the skew data includes a plurality of first skew data and a plurality of second skew data, and the above step 120 may include a step of collecting a plurality of first skew data of a first edge of the electrode sheet relative to a first preset boundary by at least one sensor, and a step of collecting a plurality of third skew data of a second edge of the electrode sheet relative to a second preset boundary by at least another sensor, where the second edge of the electrode sheet includes a tab, and screening the plurality of third skew data based on a width of the tab to obtain a plurality of second skew data.

[0062] Specifically, when the number of sensors is at least two, at least one sensor may be provided on each of both sides of the electrode sheet roll. When the number of sensors is two, the two sensors may be attached to the same slide rail or different slide rails. When applied to a specific application, the positions of the two sensors can be specified according to the width requirements of the electrode sheet roll of the battery assembly, and the electrode sheet roll can be easily adapted to various different specifications.

[0063] In an embodiment of the present application, the skew data may include a plurality of first skew data and a plurality of second skew data corresponding to at least two sensors. Exemplarily, the first edge of the electrode sheet roll is a flat edge and the second edge generally includes a tab. At least one sensor collects a plurality of first skew data of the first edge of the electrode sheet relative to the first preset boundary, and at least another sensor collects a plurality of third skew data of the second edge of the electrode sheet relative to the second preset boundary.

[0064] In some embodiments, the first preset boundary may be, for example, the position of the first edge of the electrode sheet collected for the first time within one data collection period, or the first preset boundary may be, for example, a reference edge preset in the unwinding device, or the preset boundary may be, for example, the position of the edge of the electrode sheet roll collected last time, etc., and the first preset boundary may be specifically set according to actual use needs, and is not specifically limited here. The second preset boundary may be, for example, the position of the second edge of the electrode sheet collected for the first time within one data collection period, or the second preset boundary may be, for example, a reference edge preset in the unwinding device, or the preset boundary may be, for example, the position of the edge of the electrode sheet roll collected last time, etc., and the second preset boundary may be specifically set according to actual use needs, and is not specifically limited here.

[0065] Specifically, when the data collected by the sensor includes a tab, a screening condition is set to screen the third skew data based on the width of the tab to obtain second skew data for calculating the skew correction displacement.

[0066] According to the embodiment of the present application, at least two sensors respectively obtain skew data of the edge of the electrode sheet, thereby improving the accuracy of the skew correction displacement. Each sensor may be mounted on a slide rail, so that the position of the sensor can be easily adjusted according to the needs of different widths of the electrode sheet roll, improving convenience. If the data collected by the sensor includes a tab, the collected third skew data can be screened based on the width of the tab to obtain the second skew data, thereby improving the reliability of the data for calculating the skew correction displacement.

[0067] In an embodiment of the present application, screening the plurality of third skew data based on the width of the tab to obtain the plurality of second skew data includes identifying a target skew range based on the width of the tab, and removing the third skew data that is within the target skew range to obtain the plurality of second skew data.

[0068] Specifically, the target skew range is a reasonable skew range while the electrode sheet is running. The target skew range may be used as a screening condition, and if the third skew data exceeds the target skew range, it is considered to be caused by the tab, so that the third skew data can be screened according to the target skew range.

[0069] FIG. 2 is a schematic diagram of an electrode sheet original according to an embodiment of the present application. Due to the presence of a tab, when the data collected by the sensor includes the tab, there may be a mutation in the collected third skew data, and in order to avoid the mutation data affecting the accuracy of the skew correction data, the screening condition is set according to the width of the tab. For example, the screening condition may be to screen the third skew data if the value of the third skew data is within a target skew range, where the target skew range may be, for example, the width of the tab ±1 mm. After the screening of the third skew data collected according to the screening condition is completed, the second skew data for calculating the skew correction displacement can be obtained.

[0070] According to an embodiment of the present application, by determining the target skew range based on the width of the tab, the accuracy of data screening can be improved, the accuracy of calculating the skew correction displacement can be improved, and the electrical performance of the electrode assembly can be avoided from being affected.

[0071] As another specific example, in the process of collecting the third skew data, if the difference between the currently detected third skew data and the third skew data collected at the previous collection time point exceeds the target skew range, the currently detected third skew data may be identified as the first edge of the tab, and the first edge of the tab may be as shown in FIG. 2. Next, the third skew data collected within the length of the tab may be removed based on the length of the tab. For example, the time required for the tab to pass the sensor may be determined based on the running speed of the electrode sheet, the third skew data collected by the sensor within the time range may be removed, and the remaining third skew data may be determined as the second skew data for calculating the skew correction displacement. In this way, the accuracy of data screening can be improved, and the stable output of collected data can be ensured without the need to adjust the frequency of collection of the sensor.

[0072] In some embodiments of the present application, calculating the skew correction displacement may specifically include a step of determining a skew correction displacement of the electrode sheet based on a preset proportional integral derivative function and the skew data.

[0073] For example, the preset proportional-integral-derivative function may refer to, for example, Equation (1).

[0074]

number

[0075] where x is the deskew displacement, e(t) is the skew data collected at time t,

number

number

[0076] Specifically, a closed-loop adjustment function of a preset proportional, integral and differential function can be combined to output a skew correction displacement based on the skew data of the electrode sheet roll, where the calculation parameters in the preset proportional, integral and differential function can be set according to the data such as the running speed of the electrode sheet roll and the width of the electrode sheet roll in actual application.

[0077] In an embodiment of the present application, by inputting a preset proportional, integral and differential function for the skew data collected within a collection period, the skew correction displacement can be quickly calculated, the movement of the payout device can be easily controlled, and wrinkles and damage to the electrode sheet can be avoided.

[0078] In order to better understand the electrode sheet skew correction method according to the embodiment of the present application, an embodiment in the practical application of the electrode sheet skew correction method will be described here. FIG. 3 is a schematic diagram of an electrode sheet skew correction system according to the embodiment of the present application, which includes an electrode sheet roll 301, an electrode sheet original 302, a slide table module 303, a tab 304, a sensor 305, a slide rail 306, a roller 307, a bottom plate 308, and a running direction 309 of the electrode sheet original, and the electrode sheet original runs basically along a horizontal plane. L1 is the distance from the bottom plate 308 in the horizontal direction of the first edge, and L2 is the width of the electrode sheet original. Here, the electrode sheet roll 301, the slide rail 306, and the roller 307 may be attached to the bottom plate 308. The electrode sheet original may be placed on the electrode sheet roll 301, which is further connected to the slide table module 303, and the electrode sheet roll 301 may be controlled based on the slide table module 303 to move along a traveling direction 309 perpendicular to the sheet original. As still shown in FIG. 3, the two sensors 305 may be optical fiber sensors or other types of sensors, and the type of the sensor is not limited here as long as it can detect the horizontal distance between the original edge and the bottom plate edge. The two sensors 305 may be attached to a slide rail 306, and the positions of the two sensors 305 may be adaptively adjusted according to the width of the electrode sheet original. The electrode sheet original may be transported to a battery processing device by rollers 307.

[0079] After the placement of the electrode sheet roll is completed, the electrode sheet roll 301 is controlled to rotate, so as to realize the unwinding and unwinding of the electrode sheet roll, and the two sensors 305 are respectively controlled to collect data in real time based on the collection period, so that the first skew data and the third skew data can be obtained. If the third skew data is data collected for the second edge, the second edge includes the tab 304, so that the third skew data can be screened based on the target skew range specified according to the width of the tab to obtain valid skew data, so that the second skew data can be obtained. After the first skew data and the second skew data are obtained, the skew correction displacement can be obtained by calculating based on a preset proportional integral differential function. Then, the electrode sheet roll 301 is moved by the slide table module 303 based on the skew correction displacement, so that the skew correction of the electrode sheet roll offset from the original can be realized. In the embodiment of the present application, the electrode sheet roll is skew-corrected, so that the electrode sheet roll can be effectively controlled to run within an appropriate range. For example, the electrode sheet roll is skew-corrected using the bottom plate 308 as a reference plane, so that the horizontal distance L1 between the first edge of the electrode sheet and the edge of the bottom plate is kept within an appropriate range.

[0080] Hereinafter, an electrode sheet skew correcting device according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0081] 4 is a structural schematic diagram of an electrode sheet skew correcting apparatus according to an embodiment of the present application. As shown in FIG. 4, the electrode sheet skew correcting apparatus 400 includes an acquisition module 410, a processing module 420 and a control module 430.

[0082] The collection module 410 collects skew data of the edge of the electroded sheet relative to a preset boundary by a sensor.

[0083] The processing module 420 determines a skew correction displacement of the electrode sheet based on the skew data.

[0084] The control module 430 controls the electrode sheet payout device to adjust the position of the electrode sheet based on the skew correction displacement so that the skew data of the electrode sheet relative to the preset boundary falls within a target range.

[0085] According to an embodiment of the present application, after collecting skew data of the edge of the electrode sheet relative to a preset boundary by a sensor, corresponding data processing is then performed on the skew data to quickly identify the skew correction displacement of the electrode sheet, and based on the skew correction displacement in a timely manner, the electrode sheet payout device is controlled to adjust the position of the electrode sheet so that the skew data of the electrode sheet relative to the preset boundary falls within a target range, thereby preventing the electrode sheet from wrinkling or being damaged during transport.

[0086] In some embodiments, the number of sensors is at least two, and the skew data includes a plurality of first skew data and a plurality of second skew data.

[0087] The collection module 410 further collects, by the at least one sensor, a plurality of first skew data of the first edge of the electrode sheet relative to the first preset boundary.

[0088] The collection module 410 further collects, by at least another sensor, a third plurality of skew data of the second edge of the tab relative to a second preset boundary, where the second edge of the electroded sheet includes the tab.

[0089] The processing module 420 further screens the plurality of third skew data based on the width of the tab to obtain a plurality of second skew data.

[0090] According to the embodiment of the present application, the accuracy of the skew correction displacement can be improved by acquiring skew data of the edge of the electrode sheet by at least two sensors respectively. Since each sensor can be mounted on a slide rail, the position of the sensor can be easily adjusted according to the needs of different widths of the electrode sheet roll, improving convenience. If the data collected by the sensor includes a tab, the collected third skew data can be screened based on the width of the tab to obtain the second skew data, thereby improving the reliability of the data for calculating the skew correction displacement.

[0091] In some embodiments, the collection module 410 further determines the target skew range based on the width of the tab.

[0092] The acquisition module 410 further removes the third skew data that is within the target skew range to obtain a plurality of second skew data.

[0093] According to an embodiment of the present application, by determining a target skew range according to the width of the tab, the accuracy of data screening can be improved, the accuracy of calculating the skew correction displacement can be improved, and the electrical performance of the electrode assembly can be avoided from being affected.

[0094] In some embodiments, the processing module 420 further determines a skew correction displacement of the electrode sheet based on a preset proportional-integral-derivative function and the skew data.

[0095] In an embodiment of the present application, by inputting a preset proportional, integral and differential function for the skew data collected within a collection period, the skew correction displacement can be quickly calculated, the movement of the payout device can be easily controlled, and wrinkles and damage to the electrode sheet can be avoided.

[0096] Other details of the electrode sheet skew correction device according to the embodiments of the present application are similar to those of the electrode sheet skew correction method described with reference to the examples shown in Figures 1 to 3 above, and can achieve corresponding technical effects, so for the sake of brevity, the description will be omitted here.

[0097] FIG. 5 is a schematic diagram showing the hardware configuration of an electrode sheet skew correction device according to an embodiment of the present application.

[0098] The electrode sheet skew correction device may include a processor 501 and a memory 502 having computer program instructions stored therein.

[0099] In particular, the processor 501 may include a Central Processing Unit (CPU) or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0100] Memory 502 may include mass memory used for data and instructions. For example, memory 502 may include, but is not limited to, a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more. In some embodiments, memory 502 may include removable or non-removable (or fixed) media, or memory 502 may be non-volatile solid-state memory. In some embodiments, memory 502 may be internal or external to the battery device.

[0101] In some examples, the memory 502 may be a Read Only Memory (ROM), in one example, the ROM may be a mask programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically alterable programmable ROM (EAROM), or a flash memory, or a combination of two or more thereof.

[0102] The memory 502 may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical / tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoding software that includes computer-executable instructions, and that when executed (e.g., by one or more processors) can operate to perform the operations described in the methods according to one aspect of the present disclosure.

[0103] The processor 501 reads and executes the computer program instructions stored in the memory 502 to realize the method in the embodiment shown in Figures 1 to 3 and realize the corresponding technical effects achieved by executing the method / steps in the example shown in Figures 1 to 3, which will not be described here for the sake of brevity.

[0104] In one example, the electrode sheet skew correction device may further include a communication interface 503 and a bus 504. Here, as shown in Fig. 5, the processor 501, the memory 502 and the communication interface 503 are connected by the bus 504 and complete the communication between them.

[0105] The communication interface 503 is mainly used to realize communication between each module, device, unit and / or equipment in the embodiment of the present application.

[0106] Bus 504 may include hardware, software, or both, and may couple together the components of the online data traffic charging device. For example, the bus may include, but is not limited to, an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin-in Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Accessory (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or any other suitable bus or a combination of two or more thereof. In appropriate circumstances, bus 504 may include one or more buses. Although embodiments herein have been illustrated and described with particular buses, the present application contemplates any suitable bus or interconnect.

[0107] This roll press machine can execute the electrode sheet skew correcting method in the embodiment of the present application, and realize the electrode sheet skew correcting method and device therefor described with reference to Figs. 1 to 3.

[0108] In addition, referring to the electrode sheet skew correction method and the device thereof in the above-mentioned embodiments, the embodiments of the present application can be realized by providing a readable storage medium, which stores computer program instructions, and when the computer program instructions are executed by a processor, the electrode sheet skew correction method of any one of the above-mentioned embodiments is realized.

[0109] In addition, referring to the electrode sheet skew correction method and device thereof, and readable storage medium in the above embodiments, the embodiments of the present application can be realized by providing a computer program product, which, when instructions in the computer program product are executed by a processor of an electronic device, causes the electronic device to execute any one of the electrode sheet skew correction methods in the above embodiments.

[0110] It should be noted that the present application is not limited to the specific configurations and processes described above and illustrated in the drawings. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, some specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated, and those skilled in the art may make various changes, corrections and additions, or change the order between steps after understanding the spirit of the present application.

[0111] The functional blocks shown in the above-mentioned block diagrams can be realized as hardware, software, firmware, or a combination thereof. In the case of a hardware implementation, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), appropriate firmware, a plug-in, a function card, or the like. In the case of a software implementation, the elements of the present application are programs or code segments for performing the necessary tasks. The programs or code segments may be stored in a machine-readable medium, or may be transmitted by a data signal carried on a carrier wave to a transmission medium or a communication link. The "machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, and the like. The code segments may be downloaded via a computer network such as the Internet, an intranet, or the like.

[0112] It should be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a sequence of steps or devices, however, this application is not limited to the order of steps mentioned above, i.e. steps can be performed according to the order mentioned in the embodiments, out of the order in the embodiments, or some steps can be performed simultaneously.

[0113] The above describes the various aspects of the present disclosure with reference to flowcharts and / or block diagrams of methods, devices, and computer program products according to the embodiments of the present disclosure. It should be understood that each block in the flowcharts and / or block diagrams, and combinations of each block in the flowcharts and / or block diagrams, may be realized by computer program instructions. These computer program instructions are provided to a processor of a general purpose computer, a special purpose computer, or other programmable data processing device, thereby generating an apparatus, such that the instructions executed by the processor of the computer or other programmable data processing device realize the functions / operations specified in one or more blocks in the flowcharts and / or block diagrams. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, a special application processor, or a field programmable logic circuit. It should be understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be realized by dedicated hardware performing the specified functions or operations, or by a combination of dedicated hardware and computer instructions.

[0114] Finally, it should be noted that the above embodiments are for illustrating the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still amend the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein, and such amendments or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application, and all of them should be understood to be within the scope of the claims and the specification of the present application. In particular, as long as there is no structural contradiction, the technical features mentioned in each embodiment can be arbitrarily combined. The present application is not limited to the specific embodiments disclosed above, and includes all technical solutions included in the claims.

Claims

1. collecting skew data of an edge of the electrode sheet relative to a preset boundary by a sensor; determining a skew correction displacement of the electrode sheet based on the skew data; and controlling a payout device of the electrode sheet based on the skew correction displacement to adjust a position of the electrode sheet so that skew data of the electrode sheet with respect to the preset boundary falls within a target range; the number of the sensors is at least two, and the skew data includes a plurality of first skew data and a plurality of second skew data; Collecting skew data of an edge of an electrode sheet relative to a preset boundary by the sensor includes: collecting, by at least one of the sensors, a plurality of first skew data of a first edge of the electroded sheet relative to a first preset boundary; and collecting, by at least one other of the sensors, a third plurality of skew data of a second edge of the electroded sheet relative to a second preset boundary; a second edge of the electroded sheet including a tab; screening the plurality of third skew data based on the width of the tab to obtain the plurality of second skew data; Screening the plurality of third skew data based on the width of the tab to obtain the plurality of second skew data includes: determining a target skew range based on the width of the tab; removing third skew data within the target skew range to obtain the plurality of second skew data.

13. An electrode sheet skew correction method comprising:

2. Determining a skew correction displacement of the electrode sheet based on the skew data includes: determining a skew correction displacement of the electrode sheet based on a preset proportional-integral-derivative function and the skew data; 2. The electrode sheet skew correction method according to claim 1,

3. a collection module for collecting skew data of the edge of the electrode sheet relative to a preset boundary by a sensor; a processing module that determines a skew correction displacement of the electrode sheet based on the skew data; a control module that controls a payout device of the electrode sheet based on the skew correction displacement to adjust a position of the electrode sheet so that skew data of the electrode sheet relative to the preset boundary falls within a target range, the number of the sensors is at least two, and the skew data includes a plurality of first skew data and a plurality of second skew data; The acquisition module further includes acquiring, by at least one of the sensors, a plurality of first skew data of a first edge of the electroded sheet relative to a first preset boundary; The acquisition module further acquires a third plurality of skew data of a second edge of the electroded sheet relative to a second preset boundary by at least one other of the sensors; a second edge of the electroded sheet including a tab; The processing module further includes screening the third skew data based on a width of the tab to obtain the second skew data; The collection module further determines a target skew range based on the width of the tab; The acquisition module further removes third skew data that is within the target skew range to obtain the plurality of second skew data. An electrode sheet skew correction device comprising:

4. The processing module further determines a skew correction displacement of the electrode sheet based on a preset proportional integral derivative function and the skew data.

4. The electrode sheet skew correction device according to claim 3.

5. a processor and a memory having computer program instructions stored therein; The processor reads and executes the computer program instructions to implement the electrode sheet skew correction method according to claim 1 or 2. Electrode sheet skew correction device.

6. A computer program instruction is stored, and when the computer program instruction is executed by a processor, the electrode sheet skew correction method according to claim 1 or 2 is realized. A readable storage medium.

7. The instructions in the computer program product, when executed by a processor of an electronic device, cause the electronic device to perform the electrode sheet skew correction method according to claim 1 or 2. The computer program product.

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