Methods for detecting the operating status of embossing rollers, electrode embossing devices and winding equipment

Abstract

This application relates to the field of battery manufacturing technology, providing a method for detecting the operating status of an embossing roller, an electrode embossing device, and a winding equipment. The method for detecting the operating status of the embossing roller includes: acquiring the linear velocity of the roller surface; acquiring the winding speed of the electrode; and determining that an abnormality exists in the operation of the embossing roller if the absolute value of the difference between the linear velocity and the winding speed is greater than a first preset threshold. Through the technical solution of this application, the operating status of the embossing roller can be detected in a timely manner, facilitating timely detection and maintenance of the embossing roller, thereby reducing the risk of electrode embossing defects, breakage, and other issues.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, specifically to a method for detecting the operating status of an embossing roller, an electrode embossing device, and a winding equipment. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In battery manufacturing, electrode embossing is a crucial step in the winding process. However, due to prolonged wear and tear from rolling, the embossing rollers in current electrode embossing equipment may slip or jam between the rollers and the electrodes, leading to poor embossing and breakage of the electrodes. Therefore, how to detect abnormalities during the embossing process has become an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a method, an electrode embossing device, and a winding equipment for detecting the operating status of an embossing roller, so as to achieve real-time detection of the operating status of the embossing roller and reduce the occurrence of poor electrode embossing, breakage, and other issues. This objective is achieved through the following technical solution:

[0005] In a first aspect, this application provides a method for detecting the operating status of an embossing roller, wherein the embossing roller is disposed in an electrode embossing device for embossing electrodes, and the method for detecting the operating status of the embossing roller includes: obtaining the linear velocity of the roller surface of the embossing roller; obtaining the winding speed of the electrode; and determining that the operation of the embossing roller is abnormal if the absolute value of the difference between the linear velocity and the winding speed is greater than a first preset threshold.

[0006] According to the method for detecting the operating status of the embossing roller provided in this application, when the electrode embossing device is running, the linear velocity of the embossing roller, that is, the speed at which the roller surface of the embossing roller presses the electrode sheet, is obtained. Then, the winding speed of the electrode sheet is obtained. By analyzing and judging whether the absolute value of the difference between the speed at which the embossing roller presses the electrode sheet and the winding speed of the electrode sheet is greater than a first preset threshold, the first preset threshold can be any value in the range of 1.2 mm / s to 2 mm / s. For example, if the first preset threshold is set to 1.2 mm / s, then when the winding speed of the electrode sheet is 2000 mm / s, if the obtained linear velocity of the roller surface of the embossing roller is any value in the range of 1996 mm / s to 1998 mm / s, it is judged that there is an abnormality in the operation of the embossing roller. This can provide data reference for operators to replace or repair the embossing roller in a timely manner, thereby reducing the occurrence of poor electrode embossing or breakage.

[0007] In addition, the method for detecting the operating status of embossing rollers provided in this application may also have the following additional technical features:

[0008] In some embodiments of this application, obtaining the linear velocity of the embossing roller includes: obtaining the radius of the embossing roller; and calculating the linear velocity of the embossing roller based on the product of the radius of the embossing roller and the angular velocity of the embossing roller.

[0009] Linear velocity refers to the velocity of any point on the embossing roller when it moves in a circle around its axis. Since the pressing surface of the embossing roller is a circular surface and the embossing roller moves in a circle, the linear velocity of the embossing roller can be calculated by multiplying the radius of the embossing roller by the angular velocity of the embossing roller.

[0010] In some embodiments of this application, the method further includes: determining that the embossing roller is operating normally based on the fact that the absolute value of the difference between the linear speed of the embossing roller and the winding speed is not greater than the preset speed threshold.

[0011] When the absolute value of the difference between the linear speed of the embossing roller and the winding speed of the electrode is less than or equal to the first preset threshold, wherein the first preset threshold can be set to any value within the range of 1.2 mm / s to 2 mm / s, for example, if the first preset threshold is set to 1.2 mm / s, then when the winding speed of the electrode is 2000 mm / s and the linear speed of the roller surface of the embossing roller is 1999 mm / s, the difference between the two is small and can be ignored, indicating that there is no slippage or jamming of the embossing roller and the embossing roller is operating normally.

[0012] Secondly, this application also provides a method for detecting the operating status of an embossing roller, wherein the embossing roller is disposed in an electrode embossing device for embossing electrodes, and the method for detecting the operating status of the embossing roller includes: acquiring the angular displacement of the embossing roller within a preset time; calculating the actual embossing length of the embossing roller based on the angular displacement; and determining that the operation of the embossing roller is abnormal if the absolute value of the difference between the actual embossing length and the theoretical embossing length is greater than a second preset threshold.

[0013] By obtaining the angular displacement of the embossing roller within a preset time, the actual embossing length of the embossing roller is calculated based on the product of the angular displacement and the radius of the embossing roller. The actual embossing length is then compared with the theoretical embossing length. The second preset threshold can be set to any value between 1cm and 3cm. The length of a single electrode sheet can be 17m, meaning the theoretical embossing length of the embossing roller is 17m. If the actual embossing length of the embossing roller is 16.68m, then the absolute value of the difference between the actual embossing length and the theoretical embossing length is greater than the second preset threshold, indicating that there is an abnormal situation such as slippage or jamming during the operation of the embossing roller.

[0014] In some embodiments of this application, the method further includes: obtaining the linear velocity of the roller surface of the embossing roller; obtaining the winding speed of the electrode sheet; and determining that the operation of the embossing roller is abnormal based on the absolute value of the difference between the actual embossing length and the theoretical embossing length being greater than a second preset threshold and the absolute value of the difference between the linear velocity and the winding speed being greater than a first preset threshold.

[0015] In the above technical solution, the absolute value of the difference between the actual embossing length and the theoretical embossing length being greater than a second preset threshold and the absolute value of the difference between the linear speed and the winding speed being greater than a first preset threshold are used as the basis for judging that there is an abnormality in the operation of the embossing roller, thereby helping to improve the accuracy of judging that there is an abnormality in the operation of the embossing roller.

[0016] In some embodiments of this application, the method further includes: determining that the embossing roller is operating normally based on the fact that the absolute value of the difference between the actual embossing length and the theoretical embossing length is not greater than the second preset threshold, and the absolute value of the difference between the linear speed of the embossing roller and the winding speed is not greater than the first preset threshold.

[0017] Understandably, if the absolute value of the difference between the linear speed of the embossing roller and the winding speed of the electrode sheet is not greater than the first preset threshold, and if the length of a single electrode sheet is 17m, that is, the theoretical embossing length of the embossing roller is 17m, and the second preset threshold is 1.5cm, then when the actual embossing length of the embossing roller is 16.99m, the difference between the actual embossing length and the theoretical embossing length of the embossing roller is less than the second preset threshold, indicating that the embossing roller is operating normally.

[0018] In some embodiments of this application, the method further includes: based on the determination that there is an abnormality in the operation of the embossing roller, controlling the alarm to sound an alarm and controlling the electrode embossing device to stop operating.

[0019] When the embossing roller malfunctions, a light or sound alarm can be triggered by controlling the alarm device to prompt the operator to replace or maintain the embossing roller in a timely manner, and to control the electrode embossing device to stop operating in a timely manner, so as to reduce the occurrence of poor electrode embossing or breakage caused by the embossing roller being in abnormal operation for a long time.

[0020] Thirdly, this application also provides an electrode embossing device, comprising: a base, wherein the base is provided with a first speed sensor; an embossing roller, disposed on the base and connected to the first speed sensor, wherein the first speed sensor is used to detect the angular velocity of the embossing roller; a driving member, disposed on the base and connected to the embossing roller, wherein the driving member is used to drive the embossing roller to rotate relative to the base to form embossing in the coating area of ​​the electrode; and a second speed sensor, disposed on the base, used to detect the winding speed of the electrode.

[0021] The electrode embossing device provided in the third aspect of this application includes a first speed sensor mounted on a base. This first speed sensor is connected to an embossing roller on the base and can detect the angular velocity of the embossing roller in real time. The linear velocity of the embossing roller, i.e., the embossing speed of the roller surface, can be calculated based on the product of the angular velocity and the radius of the embossing roller. Furthermore, a second speed sensor is also mounted on the base for real-time detection of the electrode winding speed. This allows for a comparison between the linear velocity of the embossing roller and the winding speed of the electrode. If the absolute value of the difference between the linear velocity of the embossing roller and the winding speed of the electrode is greater than a first preset threshold, it indicates an abnormality in the operation of the embossing roller. The first preset threshold can be any value within the range of 1.2 mm / s to 2 mm / s. For example, if the first preset threshold is set to 1.2 mm / s, then when the winding speed of the electrode is 2000 mm / s, if the linear velocity of the embossing roller is 1996 mm / s… If the linear velocity of the embossing roller is any value within the range of ~1998 mm / s, it indicates that there is an abnormality in the operation of the embossing roller, which facilitates timely maintenance or replacement of the embossing roller to reduce the occurrence of poor electrode embossing or breakage; conversely, if the linear velocity of the embossing roller is any value within the range of 1998.9 mm / s ~2000 mm / s, it indicates that the embossing roller is operating normally.

[0022] In some embodiments of this application, the electrode embossing device further includes a drive roller that is drivenly connected to the embossing roller. The drive roller is parallel to and spaced apart from the embossing roller. The electrode is configured to pass between the drive roller and the embossing roller so that the coating area of ​​the electrode can be embossed.

[0023] In the above technical solution, the active roller and the embossing roller are connected by a drive mechanism, and the drive component can be connected to the active roller. When the drive component drives the active roller to rotate, it can drive the embossing roller to rotate. The embossing roller is equipped with an embossing structure, so that when the electrode passes between the active roller and the embossing roller, the coating area of ​​the electrode can be embossed. The structure and principle are relatively simple and easy to implement.

[0024] In some embodiments of this application, the embossing roller includes a roller shaft and a cylinder disposed on the outer periphery of the roller shaft, and at least one end of the roller shaft is provided with a brake.

[0025] In the above technical solution, by setting a brake at at least one end of the roller shaft of the embossing roller, the rotation of the embossing roller can be controlled by the brake. If the operating state of the embossing roller is abnormal, the brake can be activated to stop the rotation of the embossing roller.

[0026] In some embodiments of this application, a connecting portion is provided on the outer peripheral surface of one end of the roller shaft, the first speed sensor is provided with a mounting groove, the inner wall surface of the mounting groove is provided with a mating portion, the one end of the roller shaft is inserted into the mounting groove, and the connecting portion and the mating portion are mutually restrictive and engaged so that the first speed sensor rotates with the roller shaft.

[0027] In the above technical solution, the first speed sensor has a mounting groove for accommodating one end of the roller shaft. By providing a connecting part on the outer peripheral surface of the roller shaft at one end of the mounting groove and a mating part on the inner wall surface of the mounting groove, when one end of the roller shaft is accommodated in the mounting groove and the connecting part and the mating part are connected in a limiting manner, the circumferential movement of the first speed sensor relative to the roller shaft can be restricted, so that the first speed sensor can rotate synchronously with the roller shaft, thereby realizing the detection of the angular velocity of the roller shaft.

[0028] In some embodiments of this application, one of the connecting portion and the mating portion includes a latching protrusion and the other includes a latching groove, wherein the latching protrusion is inserted into the latching groove.

[0029] In the above technical solution, the connecting part can be a locking protrusion on the outer peripheral surface of one end of the roller shaft, and the mating part can be a locking groove on the inner wall surface of the mounting groove. Alternatively, the connecting part can be a locking groove on the outer peripheral surface of one end of the roller shaft, and the mating part can be a locking protrusion on the inner wall surface of the mounting groove. One end of the roller shaft is accommodated in the mounting groove, and the locking protrusion and the locking groove are adapted to each other, thereby playing a limiting role for the first speed sensor. The structure and principle are relatively simple and easy to implement.

[0030] Fourthly, this application provides a winding apparatus, including: a winding device; and an electrode embossing device as described in any one of the embodiments of the third aspect, wherein the winding device is used to wind the embossed electrode sheet to form an electrode assembly.

[0031] The winding equipment provided according to the fourth aspect of this application includes the electrode embossing device described in any one of the embodiments of the second aspect, and therefore has the technical effects of any of the above embodiments, which will not be repeated here. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0033] Figure 1 A flowchart illustrating a method for detecting the operating status of an embossing roller according to an embodiment of this application;

[0034] Figure 2 A flowchart illustrating a method for detecting the operating status of an embossing roller according to another embodiment of this application;

[0035] Figure 3 A flowchart illustrating a method for detecting the operating status of an embossing roller, provided in yet another embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the structure of the electrode embossing device provided in some embodiments of this application;

[0037] Figure 5 This is an exploded structural diagram of the embossing roller and the first speed sensor provided in some embodiments of this application.

[0038] The attached figures are labeled as follows:

[0039] 10. Electrode embossing device;

[0040] 11. Base; 12. Embossing roller; 13. Drive roller; 14. First speed sensor; 15. Brake;

[0041] 121. Roller shaft; 122. Roller; 141. Mounting groove; 142. Mating part; 1211. Connecting part. Detailed Implementation

[0042] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0048] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0051] In battery manufacturing, electrode embossing is a crucial step in the winding process. However, due to prolonged wear and tear from rolling, the embossing rollers in current electrode embossing equipment may slip or jam between the rollers and the electrodes, leading to poor embossing and breakage of the electrodes. Therefore, how to detect abnormalities during the embossing process has become an urgent problem to be solved.

[0052] To address the problem that conventional electrode embossing devices cannot quickly detect abnormalities during the embossing process, leading to issues such as poor electrode embossing and breakage, this application proposes a method for detecting the operating status of the embossing roller in an electrode embossing device. This method involves acquiring the linear velocity of the embossing roller surface and the winding speed of the electrode during operation. The method then determines whether the absolute difference between the linear velocity of the embossing roller surface and the winding speed of the electrode is greater than a first preset threshold. If the difference is greater than the first preset threshold, it indicates a significant difference between the operating speed of the embossing roller and the winding speed of the electrode, thus identifying abnormalities such as slippage or jamming of the embossing roller. If the difference is less than or equal to the first preset threshold, it indicates that the embossing roller is operating normally.

[0053] The method for detecting the operating status of the embossing roller in the electrode embossing device disclosed in this application can be used, but is not limited to, for detecting the operating status of the embossing roller in the electrode embossing device. It can also be applied to other equipment with rolling elements such as rollers to detect the operating status of rolling elements.

[0054] Please see Figure 1 , Figure 1 This is a flowchart illustrating a method for detecting the operating state of an embossing roller according to an embodiment of this application. The first aspect of this application provides a method for detecting the operating state of an embossing roller, wherein the embossing roller is disposed in an electrode embossing device and used for embossing electrodes. The method for detecting the operating state of the embossing roller includes:

[0055] Step S100: Obtain the linear velocity of the embossing roller surface.

[0056] Step S102: Obtain the winding speed of the electrode sheet.

[0057] Step S104: If the absolute value of the difference between the linear speed and the winding speed is greater than the first preset threshold, it is determined that there is an abnormality in the operation of the embossing roller.

[0058] An electrode embossing device is a device that can emboss and form embossed patterns on the coating area of ​​the electrode to reduce the risk of electrode die-cutting failure caused by electrode roll-up deformation during the die-cutting process.

[0059] Embossing rollers are components used in electrode embossing devices to roll and press electrode sheets. The surface of the embossing rollers is decorated with embossed patterns.

[0060] The linear velocity of the embossing roller surface refers to the instantaneous velocity of each point on the roller surface along the tangential direction when the embossing roller performs circumferential rolling motion.

[0061] The linear velocity of the embossing roller can be obtained by multiplying the angular velocity of the embossing roller by its radius, or by the ratio of the arc length rotated by the embossing roller within a preset time to the preset time, or by using the linear velocity formula V=D×π×n, where D is the diameter of the embossing roller and n is the rotational speed of the embossing roller.

[0062] Understandably, the winding speed of the electrode sheet is the same as the conveyor belt speed when the electrode sheet passes through the embossing roller, and the winding speed of the electrode sheet can be detected by the speed sensor preset in the electrode sheet embossing device.

[0063] According to the method for detecting the operating status of the embossing roller provided in this application, when the electrode embossing device is running, the linear velocity of the embossing roller, that is, the speed at which the roller surface of the embossing roller presses the electrode sheet, is obtained. Then, the winding speed of the electrode sheet is obtained. By analyzing and judging whether the absolute value of the difference between the speed at which the embossing roller presses the electrode sheet and the winding speed of the electrode sheet is greater than a first preset threshold, the first preset threshold can be any value in the range of 1.2 mm / s to 2 mm / s. For example, if the first preset threshold is set to 1.2 mm / s, then when the winding speed of the electrode sheet is 2000 mm / s, if the obtained linear velocity of the roller surface of the embossing roller is any value in the range of 1996 mm / s to 1998 mm / s, it is judged that there is an abnormality in the operation of the embossing roller. This can provide data reference for operators to replace or repair the embossing roller in a timely manner, thereby reducing the occurrence of poor electrode embossing or breakage.

[0064] According to some embodiments of this application, obtaining the linear velocity of the embossing roller includes: obtaining the radius of the embossing roller; and calculating the linear velocity of the embossing roller based on the product of the radius of the embossing roller and the angular velocity of the embossing roller rotation.

[0065] Linear velocity refers to the instantaneous velocity of any point on the embossing roller when it moves in a circle around its axis. Since the pressing surface of the embossing roller is a circular surface and the embossing roller moves in a circle, the linear velocity of the embossing roller can be calculated by multiplying the radius of the embossing roller by the angular velocity of the embossing roller.

[0066] Please see Figure 2 , Figure 2 A flowchart illustrating a method for detecting the operating state of an embossing roller according to another embodiment of this application. According to some embodiments of this application, the method for detecting the operating state of an embossing roller further includes:

[0067] If the absolute value of the difference between the linear speed of the embossing roller and the winding speed of the electrode sheet is not greater than the preset speed threshold, the embossing roller is considered to be operating normally.

[0068] When the absolute value of the difference between the linear speed of the embossing roller and the winding speed of the electrode is less than or equal to the first preset threshold, wherein the first preset threshold can be set to any value within the range of 1.2 mm / s to 2 mm / s, for example, if the first preset threshold is set to 1.2 mm / s, then when the winding speed of the electrode is 2000 mm / s and the linear speed of the roller surface of the embossing roller is 1999 mm / s, the difference between the two is small and can be ignored, indicating that there is no slippage or jamming of the embossing roller and the embossing roller is operating normally.

[0069] Please see Figure 3 , Figure 3 This is a flowchart illustrating a method for detecting the operating state of an embossing roller in an electrode embossing apparatus, as provided in another embodiment of this application. In a second aspect, this application also provides a method for detecting the operating state of an embossing roller, wherein the embossing roller is disposed in an electrode embossing apparatus for embossing electrodes, and the method for detecting the operating state of the embossing roller includes:

[0070] Step S106: Obtain the angular displacement of the embossing roller within a preset time.

[0071] Step S108: Calculate the actual embossing length of the embossing roller based on the angular displacement.

[0072] Step S110: If the absolute value of the difference between the actual embossing length and the theoretical embossing length is greater than the second preset threshold, it is determined that there is an abnormality in the operation of the embossing roller.

[0073] The actual embossing length of the embossing roller within a preset time can be calculated by multiplying the angular displacement of the embossing roller by its radius. The angular displacement of the embossing roller can be detected in real time by an encoder connected to the roller.

[0074] By acquiring the angular displacement of the embossing roller within a preset time, the actual embossing length of the embossing roller is calculated based on the product of the angular displacement and the radius of the embossing roller. The actual embossing length is then compared with the theoretical embossing length. The second preset threshold can be set to any value between 1cm and 3cm. The length of a single electrode sheet can be 17m, meaning the theoretical embossing length of the embossing roller is 17m. If the actual embossing length of the embossing roller is 16.68m, then the absolute value of the difference between the actual embossing length and the theoretical embossing length is greater than the second preset threshold. This indicates that there is an abnormal situation such as slippage or jamming during the operation of the embossing roller, thus improving the accuracy of detecting the operating status of the embossing roller.

[0075] According to some embodiments of this application, the method for detecting the operating status of an embossing roller further includes:

[0076] The linear velocity of the embossing roller surface is obtained; the winding speed of the electrode sheet is obtained; and

[0077] Step S112: If the absolute value of the difference between the actual embossing length and the theoretical embossing length is greater than the second preset threshold and the absolute value of the difference between the linear speed and the winding speed is greater than the first preset threshold, it is determined that there is an abnormality in the operation of the embossing roller.

[0078] By using the absolute value of the difference between the actual embossing length and the theoretical embossing length being greater than a second preset threshold, and the absolute value of the difference between the linear speed and the winding speed being greater than a first preset threshold as the basis for judging that there is an abnormality in the operation of the embossing roller, it helps to further improve the accuracy of judging that there is an abnormality in the operation of the embossing roller.

[0079] Please see Figure 3 According to some embodiments of this application, the method for detecting the operating status of the embossing roller further includes:

[0080] The embossing roller is considered to be operating normally if the absolute value of the difference between the actual embossing length and the theoretical embossing length is not greater than the second preset threshold, and the absolute value of the difference between the linear speed and the winding speed of the embossing roller is not greater than the first preset threshold.

[0081] Understandably, if the absolute value of the difference between the linear speed of the embossing roller and the winding speed of the electrode sheet is not greater than the first preset threshold, and if the absolute value of the difference between the linear speed of the embossing roller and the winding speed is not greater than the first preset threshold (for example, if the length of a single electrode sheet is 17m, that is, the theoretical embossing length of the embossing roller is 17m, and the second preset threshold is 1.5cm), then when the actual embossing length of the embossing roller is 16.99m, if the difference between the actual embossing length and the theoretical embossing length of the embossing roller is less than the second preset threshold, it indicates that the embossing roller is operating normally.

[0082] In some embodiments of this application, the method for detecting the operating status of the embossing roller further includes:

[0083] Step S114: If there is an abnormality in the operation of the embossing roller, control the alarm to sound an alarm and control the electrode embossing device to stop operating.

[0084] When the embossing roller malfunctions, a light or sound alarm can be triggered by controlling the alarm device to prompt the operator to replace or maintain the embossing roller in a timely manner, and to control the electrode embossing device to stop operating in a timely manner, so as to reduce the occurrence of poor electrode embossing or breakage caused by the embossing roller being in abnormal operation for a long time.

[0085] According to some embodiments of this application, this application provides a method for detecting the operating status of an embossing roller, including: operating an electrode embossing device; acquiring the linear velocity of the roller surface of the embossing roller; acquiring the winding speed of the electrode; acquiring the angular displacement of the embossing roller within a preset time; calculating the actual embossing length of the embossing roller based on the angular displacement and the radius of the embossing roller, and determining that the actual embossing length of the embossing roller is greater than a second preset threshold and / or that the absolute value of the difference between the linear velocity and the winding speed is greater than a first preset threshold, thus determining that the operation of the embossing roller is abnormal; determining that the operation of the embossing roller is normal based on the absolute value of the difference between the actual embossing length and the theoretical embossing length not being greater than the second preset threshold, and the absolute value of the difference between the linear velocity and the winding speed of the embossing roller not being greater than the first preset threshold; wherein, the linear velocity of the roller surface of the embossing roller is calculated based on the product of the radius of the embossing roller and the angular velocity of the rotation of the embossing roller.

[0086] Thirdly, please see Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of the electrode embossing device provided in some embodiments of this application; Figure 5 This is an exploded view of the embossing roller and the first speed sensor provided in some embodiments of this application. This application also provides an electrode embossing device 10, including: a base 11, an embossing roller 12, a drive unit (not shown), a second speed sensor (not shown), and a controller (not shown). The base 11 is equipped with a first speed sensor 14; the embossing roller 12 is disposed on the base 11 and connected to the first speed sensor 14, the first speed sensor being used to detect the angular velocity of the embossing roller; the drive unit is disposed on the base 11 and connected to the embossing roller 12, the drive unit being used to drive the roller 122 assembly to rotate relative to the base 11 to form embossing in the coating area of ​​the electrode; the second speed sensor is disposed on the base 11 and is used to detect the winding speed of the electrode; wherein the first speed sensor 14 is used to detect the linear displacement of the embossing roller 12.

[0087] The base 11 is used to mount components such as the embossing roller 12, the first speed sensor 14, the drive unit, and the speed sensor.

[0088] For example, the first speed sensor 14 is an encoder, which can record the angular velocity of the embossing roller 12 in real time and transmit it to the controller. The controller can be a programmable controller and can calculate the linear velocity of the roller surface based on the product of the angular velocity and the radius of the embossing roller 12.

[0089] The speed sensor can detect the speed of electrode winding in real time.

[0090] The electrode embossing device 10 provided in the third aspect of this application, by setting a first speed sensor 14 on the base 11, the first speed sensor 14 is connected to the embossing roller 12 on the base 11 and can detect the angular velocity of the embossing roller 12 in real time. Therefore, the linear velocity of the embossing roller 12, i.e., the embossing speed of the roller surface, can be calculated based on the product of the angular velocity and the radius of the embossing roller 12. In addition, a second speed sensor for real-time detection of the electrode winding speed is also set on the base 11. Thus, the controller can compare the linear velocity of the embossing roller 12 with the winding speed of the electrode. If the absolute value of the difference between the linear velocity of the embossing roller 12 and the winding speed of the electrode is greater than a first preset threshold, it indicates that the operation of the embossing roller 12 is abnormal. The first preset threshold can be 1.2. Any value within the range of mm / s to 2mm / s, for example, if the first preset threshold is set to 1.2mm / s, then when the winding speed of the electrode sheet is 2000mm / s, if the linear speed of the embossing roller 12 is any value within the range of 1996 mm / s to 1998mm / s, it is determined that there is an abnormality in the operation of the embossing roller 12, which facilitates timely maintenance or replacement of the embossing roller 12 to reduce the occurrence of poor embossing or breakage of the electrode sheet; conversely, if the linear speed of the embossing roller 12 is any value within the range of 1998.9 mm / s to 2000mm / s, it indicates that the embossing roller 12 is operating normally.

[0091] Please see Figure 4 According to some embodiments of this application, the electrode embossing apparatus 10 further includes an active roller 13 that is drivenly connected to the embossing roller 12. The active roller 13 is parallel to and spaced apart from the embossing roller 12. The electrode is configured to pass between the active roller 13 and the embossing roller 12 so that the coating area of ​​the electrode can be embossed.

[0092] The surface of the drive roller 13 is free of embossing patterns. It is used in conjunction with the embossing roller 12 to roll the electrode sheet to form embossing patterns on the electrode sheet.

[0093] The drive roller 13 is connected to the embossing roller 12. The drive component can be connected to the drive roller 13. When the drive component drives the drive roller 13 to rotate, it can drive the embossing roller 12 to rotate. The embossing roller 12 is provided with an embossing structure, so that when the electrode passes between the drive roller 13 and the embossing roller 12, the coating area of ​​the electrode can be embossed. The structure and principle are relatively simple and easy to implement.

[0094] Please see Figure 5 According to some embodiments of this application, the embossing roller 12 includes a roller shaft 121 and a roller 122 disposed on the outer periphery of the roller shaft 121, and a brake 15 is provided at least one end of the roller shaft 121.

[0095] Understandably, the surface of roller 122 is decorated with embossed patterns.

[0096] Brake 15 is a device that has the function of slowing down, stopping or maintaining a stopped state of moving parts (or moving machinery).

[0097] By providing a brake 15 at at least one end of the roller shaft 121 of the embossing roller 12, the rotation of the embossing roller 12 can be controlled by the brake 15. If the operating state of the embossing roller 12 is abnormal, the brake 15 can be activated to stop the rotation of the embossing roller 12.

[0098] Please see Figure 5 According to some embodiments of this application, a connecting portion 1211 is provided on the outer peripheral surface of one end of the roller 121, and a mounting groove 141 is provided on the first speed sensor 14. A mating portion 142 is provided on the inner wall surface of the mounting groove 141. One end of the roller 121 is inserted into the mounting groove 141, and the connecting portion 1211 and the mating portion 142 are mutually limited and fitted so that the first speed sensor 14 rotates with the roller 121.

[0099] The first speed sensor 14 has a mounting groove 141 for accommodating one end of the roller shaft 121. By providing a connecting part 1211 on the outer peripheral surface of the roller shaft 121 located at one end of the mounting groove 141 and a mating part 142 on the inner wall surface of the mounting groove 141, when one end of the roller shaft 121 is accommodated in the mounting groove 141 and the connecting part 1211 and the mating part 142 are connected in a limiting manner, the circumferential movement of the first speed sensor 14 relative to the roller shaft 121 can be restricted, so that the first speed sensor 14 can rotate synchronously with the roller shaft 121, thereby realizing the detection of the angular velocity of the roller shaft 121.

[0100] According to some embodiments of this application, one of the connecting part 1211 and the mating part 142 includes a latching protrusion and the other includes a latching groove, with the latching protrusion inserted into the latching groove.

[0101] That is, the connecting part 1211 can be a locking protrusion on the outer peripheral surface of one end of the roller shaft 121, and the mating part 142 can be a locking groove on the inner wall surface of the mounting groove 141. Alternatively, the connecting part 1211 can be a locking groove on the outer peripheral surface of one end of the roller shaft 121, and the mating part 142 can be a locking protrusion on the inner wall surface of the mounting groove 141. One end of the roller shaft 121 is accommodated in the mounting groove 141, and the locking protrusion and the locking groove are adapted to each other, thereby playing a limiting role for the first speed sensor 14. The structure and principle are relatively simple and easy to implement.

[0102] Fourthly, this application also provides a winding apparatus, including: a winding device and an electrode embossing device 10 as described in any of the embodiments of the third aspect, wherein the winding device is used to wind the embossed electrode to form an electrode assembly.

[0103] For example, the winding device can be a winding needle, the electrode embossing device 10 embosses the cathode electrode, and the winding needle is used to wind the anode electrode, the diaphragm and the embossed cathode electrode to form an electrode assembly.

[0104] The winding equipment provided according to the fourth aspect of this application includes the electrode embossing device 10 of any of the embodiments in the third aspect, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0105] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for detecting the operating status of an embossing roller, wherein the embossing roller is disposed in an electrode embossing device, the electrode embossing device further includes a driving member and a drive roller drivenly connected to the embossing roller, the driving member being directly connected to the drive roller, and the embossing roller being used to emboss the electrode sheet in cooperation with the drive roller, characterized in that, The method for detecting the operating status of the embossing roller includes: Obtain the angular displacement of the embossing roller within a preset time period; The actual embossing length of the embossing roller is calculated based on the angular displacement and the radius of the embossing roller; Obtain the linear velocity of the embossing roller surface; Obtain the winding speed of the electrode sheet; If the absolute value of the difference between the actual embossing length and the theoretical embossing length is greater than a second preset threshold and the absolute value of the difference between the linear speed and the winding speed is greater than a first preset threshold, it is determined that there is an abnormality in the operation of the embossing roller.

2. The method for detecting the operating status of an embossing roller according to claim 1, characterized in that, The method further includes: The embossing roller is determined to be operating normally if the absolute value of the difference between the actual embossing length and the theoretical embossing length is not greater than the second preset threshold, and the absolute value of the difference between the linear speed of the embossing roller and the winding speed is not greater than the first preset threshold.

3. The method for detecting the operating status of an embossing roller according to claim 1, characterized in that, The step of obtaining the linear velocity of the embossing roller includes: Obtain the radius of the embossing roller; The linear velocity of the embossing roller is calculated by multiplying the radius of the embossing roller by the angular velocity of the embossing roller.

4. The method for detecting the operating status of an embossing roller according to any one of claims 1-3, characterized in that, The method further includes: If there is an abnormality in the operation of the embossing roller, the alarm will sound and the electrode embossing device will stop operating.

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