Unwinding device, unwinding detection device and angle adjustment method

Abstract

The present invention discloses an unwinding device, an unwinding detection device, and an angle adjustment method. The unwinding device includes a base plate; an unwinding assembly, disposed on the base plate, for unwinding a material roll into a material strip; a first roller assembly, disposed on the base plate, for receiving the material strip from the unwinding assembly; a material roll detection member, disposed on the base plate, for detecting the radial size of the material roll on the unwinding assembly; a first tab guide, disposed on the first roller assembly, located outside the first roller assembly and capable of corresponding to the position of the first tab on the material strip and the tab; and an adjustment assembly, electrically connected to the material roll detection member and transmission-connected to the first tab guide, for driving the first tab guide to rotate around the axis of the first roller assembly to an angle consistent with the inclination angle of the material strip. A first roller with a small diameter can be used, the deviation error of the material strip in the direction of the axis of the first roller is small, the tab guide deviation correction is stable, the tab is not prone to folding, and the automatic splicing of two material rolls is convenient.

Description

Technical Field

[0001] The present invention relates to the field of smoothing of winding tabs of battery cells, and in particular to an unwinding device, an unwinding detection device and an angle adjustment method. Background Art

[0002] In the existing battery cell preparation, during the material strip transfer process, if the conventional roller design is followed, it is easy for the tab to collide with the roller, resulting in problems such as the tab flipping, affecting the subsequent processes and product quality. Therefore, the first roller is generally set to a large roller diameter, and the subsequent rollers are generally conventional rollers with ordinary roller diameters. Because ordinary rollers are limited by the tension frame fixing components, their incoming material angles do not change, and therefore are not affected by the reel diameter; and for the rollers at the unwinding position, the angle of the material strip changes with the size of the reel diameter, that is, the angle of the tab relative to the roller also changes in real time. Therefore, the diameter of the first roller is larger than that of other rollers to reduce the impact of the angle change caused by the reel diameter, so that the tab does not flip.

[0003] Even if the tab folding problem is solved by the above method, such as using a roller with a diameter of 150, the tab transition is relatively smooth, which relatively solves the tab folding problem. However, there are problems such as the large diameter of the first roller, which occupies a large volume, is difficult to ensure horizontal orientation, is difficult to assemble, and cannot automatically connect the two rolls. It also increases the difficulty of correcting the deviation of the subsequent electrode. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an unwinding device that can use a first roller with a smaller diameter. This reduces the deviation error of the strip along the axis of the first roller, ensures stable tab guidance and correction, and reduces the risk of tab folding, facilitating the automatic splicing of two strips.

[0005] Also provided is an unwinding detection device having the unwinding device;

[0006] Also provided is an angle adjustment method using the unwinding device.

[0007] The unwinding device according to the first embodiment of the present invention includes:

[0008] substrate;

[0009] an unwinding assembly, disposed on the substrate, for unwinding the material roll into a material tape;

[0010] A first roller assembly is provided on the substrate and is used to receive the material tape of the unwinding assembly;

[0011] A material roll detection component is provided on the substrate and is used to detect the radial size of the material roll on the unwinding assembly;

[0012] A first tab guide is provided on the first roller assembly, located outside the first roller assembly, and can correspond to the position of the tab on the material strip at the receiving portion of the first roller assembly;

[0013] The adjusting component is electrically connected to the material coil detection component and is transmission-connected to the first tab guide, and is used to drive the first tab guide to rotate around the axis of the first roller assembly to be consistent with the inclination angle of the material strip.

[0014] The unwinding device according to the first embodiment of the present invention has at least the following beneficial effects:

[0015] 1. Determine the coordinate system on the substrate, and place the material roll directly on the unwinding assembly. The center position of the material roll is fixed, and the specific position can be determined by the coordinate system. The diameter or radius of the material roll is detected in real time by the material roll detection component. The center position of the first roller assembly is fixed, and the specific position can be determined by the coordinate system. The radius of the first roller assembly is fixed, and the inclination angle β of the material strip relative to the coordinate system can be calculated in real time. Then, the inclination angle β of the first tab guide is adjusted by the adjustment component, and β=α, so that the first tab guide can guide the tab on the material strip to achieve tab deviation correction, and the tab deviation correction is more accurate;

[0016] 2. There is no need to increase the diameter of the first roller assembly for deviation correction. A smaller diameter first roller assembly can be used. The smaller diameter first roller assembly will have smaller jitter deviation error along its axis during rotation, so that when the material strip moves on the first roller assembly, its axial deviation error is smaller;

[0017] 3. Real-time detection of the radial size of the material roll on the unwinding component. After the previous material roll is unwound, it will be connected with the next material roll to continue unwinding. After the next material roll is connected, the adjustment component will adjust the angle α between the first tab guide and the material strip according to the diameter or radius of the next material roll detected by the material roll detection component, realizing automatic adjustment without manual reset adjustment, thereby improving the degree of production automation, production work efficiency and the accuracy of tab correction.

[0018] According to some embodiments of the present invention, the first roller assembly includes a first roller and a base, the base is fixedly arranged on the substrate, the first roller is arranged on the base and can rotate around its axis, the first tab guide is arranged on the same rotating axis as the first roller, is located on the outside of the first roller, and corresponds to the position of the first roller receiving the material strip and the tab position of the material strip.

[0019] According to some embodiments of the present invention, the adjustment assembly includes a driving member and a rotating shaft, the driving member is fixedly provided on the base and electrically connected to the material roll detection member, the rotating shaft is transmission-connected to the driving member and rotates around its axis under the drive of the driving member, the rotating shaft is rotationally provided on the base, and the first roller is coaxially sleeved on the rotating shaft and is smoothly rotationally connected to the first roller, the rotating shaft is transmission-connected to the first tab guide to drive the first tab guide to rotate.

[0020] According to some embodiments of the present invention, the coil detection component is used to detect the coil diameter or the coil radius.

[0021] According to some embodiments of the present invention, a bearing is provided between the rotating shaft and the first roller.

[0022] According to some embodiments of the present invention, at least one reset detection member is further included, and the reset detection member is arranged on the base, and a detection channel is provided on the side of the reset detection member away from the axis of the first roller, and the detection channel is arranged along the circumferential direction of the first roller, and a sensing member is provided on the first tab guide, and the sensing member is arranged along the axial direction of the first tab guide and extends to the detection channel, and a turning part is provided at the corresponding position of the sensing member and the detection channel, and the turning part extends toward the detection channel for detection by the detection channel.

[0023] According to some embodiments of the present invention, the first tab guide comprises a guide plate, and the guide plate is arranged tangentially to the first roller assembly at an interval.

[0024] According to some embodiments of the present invention, the guide plate is provided with an anti-warping portion on both sides along the material belt transmission direction, and the anti-warping portion is arranged in a direction away from the first roller assembly.

[0025] According to some embodiments of the present invention, the first tab guide is arranged to extend from both ends of the first roller along the axial direction of the first roller.

[0026] According to the second embodiment of the present invention, the unwinding detection device includes: the unwinding device described in the first embodiment of the present invention, which specifically includes:

[0027] A plurality of roller assemblies are provided on the substrate and are used to receive the material strip. The plurality of roller assemblies are counted sequentially as the Nth roller assembly along the direction of the material strip. When N=1, the roller assembly is the first roller assembly.

[0028] A plurality of tab guides are provided on the substrate, each tab guide corresponding to each roller assembly, wherein the tab guide corresponding to the first roller assembly is the first tab guide;

[0029] A material feeding detection assembly is provided on the substrate and is located between the first roller assembly and the unwinding assembly, and is used to detect the material roll and the feeding of the first roller assembly;

[0030] A deflection correction detection assembly is provided on the substrate and is located between the first roller assembly and the second roller assembly, and is used to detect the position of the material strip and the position of the upper tab of the material strip;

[0031] An electrostatic elimination component is provided on the substrate and is located behind the second roller assembly, and is used to eliminate static electricity on the surface of the material belt;

[0032] A dust removal detection component is provided on the substrate and is located behind the static elimination component along the material strip direction, and is used for removing dust from the material strip surface;

[0033] The residual static electricity detection component is arranged on the substrate and is located behind the dust removal detection component along the material belt direction, and is used to detect the static electricity voltage of the material belt.

[0034] The unwinding detection device according to the embodiment of the second aspect of the present invention has at least the following beneficial effects: it can detect the material tape during the material tape conveying process, facilitate the subsequent winding step of the material tape, and produce a better quality core.

[0035] According to the angle adjustment method of the third embodiment of the present invention, using the unwinding device described in the first embodiment of the present invention, it specifically includes:

[0036] Set up a coordinate system to determine the radial size of the first roller assembly, the coordinates of the roller center of the first roller assembly, and the coordinates of the center of the roll on the unwinding assembly, and use the roll detection component to detect the radial size of the roll in real time;

[0037] Substitute the above values ​​into the equation to calculate the tangent equation between the roller of the first roller assembly and the material roll, calculate its slope, and calculate the inclination angle of the slope in the coordinate system as α according to the inverse trigonometric function. The adjustment component adjusts the inclination angle β of the first tab guide in the coordinate system so that β=α

[0038] The angle adjustment method according to the third aspect of the present invention has at least the following beneficial effects:

[0039] According to the change in the radial size of the material roll when it is unwound, the slope change value of the material roll is calculated in real time, and then the angle between the first tab guide and the material strip is adjusted so that the angle between the first tab guide and the material strip is α, which makes it easier for the first tab guide to dynamically correct the tabs on the material strip, automatically corresponding to the material strip of the material roll, and making the correction more accurate.

[0040] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0042] Figure 1 This is a schematic diagram of the overall structure of an unwinding detection device according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic structural diagram of an unwinding device according to an embodiment of the present invention;

[0044] Figure 3 for Figure 2 A partial enlarged view of part A;

[0045] Figure 4 This is a schematic diagram of a process for adjusting the rotation angle of the first tab guide of an unwinding device according to an embodiment of the present invention;

[0046] Figure 5 The figure is a schematic diagram of a process for adjusting the lifting height of an unwinding assembly by an unwinding device according to an embodiment of the present invention.

[0047] Figure Number:

[0048] substrate 100;

[0049] Unwinding assembly 200; material strip 210;

[0050] First roller assembly 300; first roller 310; base 320;

[0051] First tab guide 400; induction member 410; guide piece 420; warped portion 430;

[0052] Adjustment assembly 500; driving member 510; rotating shaft 520;

[0053] Reset detection member 600;

[0054] Static elimination component 700;

[0055] Dust removal detection component 800;

[0056] Static electricity detection component 900. DETAILED DESCRIPTION

[0057] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0058] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0060] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0061] Reference Figures 1 to 5 As shown, the unwinding device according to the first embodiment of the present invention includes:

[0062] substrate 100;

[0063] The unwinding assembly 200 is disposed on the substrate 100 and is used to unwind the material roll into a material tape 210;

[0064] The first roller assembly 300 is disposed on the substrate 100 and is used to receive the material strip 210 of the unwinding assembly 200;

[0065] The material roll detection component is provided on the base plate 100 and is used to detect the radial size of the material roll on the unwinding assembly 200;

[0066] The first tab guide 400 is provided on the first roller assembly 300 and is located outside the first roller assembly 300 so as to correspond to the receiving portion of the material strip 210 of the first roller assembly 300 and the tab position of the material strip 210;

[0067] The adjustment assembly 500 is electrically connected to the material coil detection component and is transmission-connected to the first tab guide 400 , and is used to drive the first tab guide 400 to rotate around the axis of the first roller assembly 300 to an angle consistent with the inclination angle of the material strip 210 .

[0068] Here, "consistent" also includes basic consistency.

[0069] The first roller assembly 300 refers to the first roller assembly that the material strip 210 passes through after the material roll is unwound; and the first tab guide 400 refers to the tab guide corresponding to the first roller assembly 300 .

[0070] Among them, the first pole tab guide 400 can correspond to the receiving material belt 210 of the first roller assembly 300 and the pole tab position of the material belt 210, which means that: the material belt 210 has a transportation direction, and when it contacts the first roller assembly 300, the material belt 210 has an in-roll position and an out-roll position. The in-roll position of the material belt 210 is the receiving material belt 210 of the first roller assembly 300, and the first pole tab guide 400 is set at the in-roll position of the material belt 210. When the material belt 210 contacts the first roller assembly 300, the first pole tab guide 400 can simultaneously contact the pole tab on the material belt 210 to guide the pole tab on the material belt 210 to avoid tearing or folding of the pole tab. The tabs are often arranged to extend out of the side of the material strip 210. When the material strip 210 passes through the first roller assembly 300, because the relative positions of the material strip 210 and the first roller assembly 300 are different, the material strip 210 may be in the following situations: 1. The material strip 210 is completely located on the first roller 310, but the tabs extend out of the first roller assembly 300. At this time, the first tab guide 400 also needs to correspond to the portion of the tabs extending out of the first roller assembly 300; 2. The material strip 210 is completely located on the first roller 310, and the tabs are also located in the first roller assembly 300. 1. The first tab guide 400 is arranged on a roller assembly 300 and close to the end of the first roller assembly 300. At this time, the first tab guide 400 corresponds to the tab position of the material belt 210 of the first roller assembly 300; 3. The material belt 210 is completely located on the first roller 310, and the tab is also located on the first roller assembly 300, and the tab is located in the middle of the first roller assembly 300. At this time, the first tab guide 400 corresponds to the tab position of the material belt 210 of the first roller assembly 300, and corresponds to the middle of the first roller assembly 300.

[0071] In this embodiment, the overall length of the first tab guide 400 can cover the entire first roller assembly 300 along the axial direction of the first roller assembly 300, and extend out from both ends of the first roller assembly 300 along the axial direction, so as to facilitate the tab position of the adaptive material strip 210 and the first roller assembly 300 at different relative positions.

[0072] When the first roller assembly 300 is tightening the material strip 210, a portion of the roller surface will come into contact with the material strip 210. The first tab guide 400 can cover the contact position between the roller surface and the material strip 210. During the contact between the material strip 210 and the first roller assembly 300, the tab is completely guided by the first tab guide 400, effectively preventing the tab from folding. Of course, when the first roller assembly 300 only contacts the tab at the feed position of the material strip 210 and does not cover the entire contact position between the roller surface and the material strip 210, it can still guide the tab when the tab enters the first roller assembly 300.

[0073] The radial size of the roll refers to the diameter or radius of the roll.

[0074] Specifically, conventional substrate 100 is typically placed perpendicular to the ground. The axis of unwinding assembly 200 is perpendicularly positioned on substrate 100 and parallel to the ground. The axis of first roller assembly 300 is positioned parallel to unwinding assembly 200 and also parallel to the ground to receive the material strip 210 unwound by unwinding assembly 200. After unwinding by unwinding assembly 200, material strip 210 passes through first roller assembly 300. Under the tension of first roller assembly 300 and subsequent roller assemblies, material strip 210 is tensioned, allowing it to be transported along a designated path and facilitate subsequent winding.

[0075] It is worth understanding that a coordinate system is determined on the substrate 100, the material roll is placed directly on the unwinding assembly 200, the center position of the material roll is fixed, and the specific position can be determined by the coordinate system. The diameter or radius of the material roll can be detected in real time by the material roll detection component. The center position of the first roller assembly 300 is fixed, and the specific position can be determined by the coordinate system. The radius of the first roller assembly 300 is fixed, and the inclination angle α of the material strip 210 relative to the coordinate system can be calculated in real time, and then the inclination angle β of the first tab guide 400 is adjusted by the adjustment assembly 500, and β=α, so that the first tab guide 400 can guide the tab on the material strip 210 to achieve tab correction, and the tab correction is more accurate.

[0076] When β=α, the first tab guide 400 is parallel to the material strip 210 , and the tabs on the material strip 210 can be turned together with the material strip 210 after contacting the first tab guide 400 .

[0077] The material roll detection component is a distance measuring sensor, which can be a laser sensor or an ultrasonic sensor.

[0078] Specifically, when the positions of the unwinding assembly 200 and the first roller assembly 300 are fixed, as the unwinding assembly 200 is unwound, the radial size of the coil will gradually decrease, and the slope of the material strip 210 will also change as the radial size of the coil decreases. The slope of the material strip 210 corresponding to coils of different radial sizes can be calculated through the center position of the unwinding assembly 200, the center position of the first roller assembly 300, the diameter or radius of the first roller 310, and the real-time diameter or radius of the coil. The position of the first tab guide 400 relative to the first roller assembly 300 is adjusted by the slope of the material strip 210, so that the first tab guide 400 can be parallel to the material strip 210 at the feed roller position of the material strip 210, and the tab can directly contact the first tab guide 400 at the feed roller position. The tab will turn together with the material strip 210, and the tab is not easy to fold relative to the material strip 210.

[0079] It is worth noting that when the diameter of the first roller assembly 300 is too large, it occupies a large space and has a large deadweight. As a result, it is more likely to shift along its axis during rotation, causing the material strip 210 to deflect along the axial direction of the first roller 310 as it moves on the first roller assembly 300, thus affecting the subsequent winding of the material strip 210. However, in this solution, there is no need to correct the deviation by increasing the diameter of the first roller assembly 300. A first roller assembly 300 with a smaller diameter can be used. A first roller assembly 300 with a smaller diameter will experience less jitter and deviation errors along its axis during rotation, resulting in a smaller deviation error in the axial direction of the material strip 210 as it moves on the first roller assembly 300.

[0080] It is worth noting that after the previous roll is unwound, tape is usually used to attach the end of the previous roll to the beginning of the next roll to allow the next roll to be unwound. This attachment process is usually called splicing. When the roll is replaced, its radial size also changes significantly. In this solution, the roll detection component can detect the radial size of the roll on the unwinding assembly 200 in real time. After the next roll is spliced, the adjustment component 500 will adjust the angle α between the first tab guide 400 and the tape 210 based on the radial size of the next roll detected by the roll detection component, realizing automated adjustment without the need for manual reset adjustment, thereby improving the degree of production automation, production efficiency, and the accuracy of tab deviation correction.

[0081] Among them, the first pole tab guide 400 and the first roller assembly 300 rotate around the same axis, and the distance between the first pole tab guide 400 and the first roller assembly 300 can be determined according to the thickness of the material strip 210, so that the material strip 210 can pass through and guide the pole tab on the material strip 210. At the same time, the first pole tab guide 400 contacts the pole tab when the material strip 210 rotates and deforms, driving the pole tab and the material strip 210 to rotate and deform together.

[0082] In addition, refer to Figure 1 and Figure 5 As shown, in some specific embodiments of the present invention, the adjustment component 500 is transmission-connected to the unwinding component 200 and is used to adjust the height of the material roll of the unwinding component 200.

[0083] It is worth understanding that when the position of the first roller assembly 300 and the position of the first tab guide 400 are fixed, the height of the unwinding assembly 200 can be adjusted by lifting and lowering so that the center position of the unwinding assembly 200 moves, thereby maintaining the slope of the material strip 210 fixed. The material strip 210 can contact the first roller assembly 300 and the first tab guide 400 at the same angle, so that the tab will turn together with the material strip 210, and the tab is not easily folded relative to the material strip 210.

[0084] Specifically, during each unwinding process of the unwinding assembly 200, the radius of the coil is reduced by the thickness of one strip 210. Based on the thickness of the two strips 210 being evenly divided into the rotation angle of the first roller assembly 300, the height value of the unwinding assembly 200 that needs to be changed when the unwinding assembly 200 rotates a basic angle can be obtained, thereby achieving height control of the unwinding assembly 200. Alternatively, the radial size of the coil can be directly measured by a coil detection component to measure its diameter or radius, and the unwinding assembly 200 can be controlled to change the height by the same value as the diameter change or radius change, so that the slope of the strip 210 remains unchanged, and the tab is not easily folded relative to the strip 210.

[0085] Reference Figure 2 As shown, in some specific embodiments of the present invention, the first roller assembly 300 includes a first roller 310 and a base 320, the base 320 is fixedly arranged on the substrate 100, the first roller 310 is arranged on the base 320, and can rotate around its axis, the first tab guide 400 is arranged on the same axis as the first roller 310, is located on the outside of the first roller 310, and corresponds to the position of the first roller 310 receiving the material belt 210 and the tab position of the material belt 210.

[0086] The term "co-rotation axis arrangement" means that the first roller 310 and the first tab guide 400 have the same rotation axis and can rotate around the same rotation axis.

[0087] It is worth understanding that when the material strip 210 enters the first roller 310 from the feed roller position and passes through the first roller 310, the material strip 210 will abut against the first tab guide 400 outside the first roller 310 and guide the tab so that the tab and the material strip 210 rotate around the first roller 310 together.

[0088] Reference Figure 2As shown, in some specific embodiments of the present invention, the adjustment component 500 includes a driving member 510 and a rotating shaft 520. The driving member 510 is fixedly arranged on the base 320 and is electrically connected to the material roll detection member. The rotating shaft 520 is transmission-connected to the driving member 510 and rotates around its axis under the drive of the driving member 510. The rotating shaft 520 is rotationally arranged on the base 320. The first roller 310 is coaxially sleeved on the rotating shaft 520 and is smoothly rotationally connected to the first roller 310. The rotating shaft 520 is transmission-connected to the first tab guide 400 to drive the first tab guide 400 to rotate.

[0089] Smooth rotation means that when the first roller 310 rotates, the sliding friction between it and the rotating shaft 520 is low. When the first roller 310 is subjected to the tension of the material strip 210, the friction between the first roller 310 and the rotating shaft 520 is low, allowing the first roller 310 to rotate relative to the rotating shaft 520, facilitating the passage of the material strip 210.

[0090] It is worth understanding that the driving member 510 and the material roll detection member are electrically connected through a PLC sensor. After the material roll detection member detects the real-time radial size of the material roll, the PLC sensor is used to calculate and obtain the angle that the first pole tab guide 400 needs to rotate, and sends it to the driving member 510. The driving member 510 drives the rotating shaft 520 to rotate the required angle, and the rotating shaft 520 drives the first pole tab guide 400 to rotate this angle, thereby realizing the adjustment of the first pole tab guide 400, so that the angle between the first pole tab guide 400 and the material strip 210 can always be maintained at the α value, thereby realizing the first pole tab guide 400 guiding the pole tab on the material strip 210.

[0091] Specifically, the driving member 510 is a servo motor, which is bolted to the base 320. Its output shaft is connected to the rotating shaft 520 via a coupling. The base 320 is provided with two protruding fixed walls. The outer peripheral wall of the rotating shaft 520 is mounted on two fixed arms via bearings and can rotate relative to the two fixed arms. The first roller 310 is mounted on the rotating shaft 520 between the two fixed arms. The first roller 310 and the rotating shaft 520 are connected by bearings to achieve smooth rotation. The first roller 310 and the rotating shaft 520 are coaxially arranged. The first tab guide assembly is fixedly connected to the rotating shaft 520 via two connecting arms.

[0092] Reference Figure 2 and Figure 3As shown, in some specific embodiments of the present invention, at least one reset detection member 600 is further included. The reset detection member 600 is arranged on the base 320, and a detection channel is provided on the side thereof away from the axis of the first passing roller 310. The detection channel is arranged along the circumferential direction of the first passing roller 310. A sensing member 410 is provided on the first pole tab guide 400. The sensing member 410 is arranged along the axial direction of the first pole tab guide 400 and extends to the detection channel. A turning portion is provided at the corresponding position of the sensing member 410 and the detection channel, and the turning portion extends toward the detection channel for detection by the detection channel.

[0093] It is worth noting that the rotation angle of the first tab guide 400 can be confirmed by the reset detection member 600 to avoid errors in the first tab guide 400 during multiple rotations, thereby improving the rotation accuracy of the first tab guide 400. When there are multiple reset detection members 600, the multiple reset detection members 600 are arranged along the circumferential direction of the first roller 310, and each reset detection member 600 corresponds to a rotation position of the first tab guide 400. When the first tab guide 400 rotates past the corresponding reset detection member 600, the rotation angle of the first tab detection member can be determined, thereby improving the rotation accuracy of the first tab guide 400.

[0094] Specifically, the material roll is installed on the unwinding assembly 200, and the position of the first tab guide 400 is the initial position. A reset detection component 600 is set on the base 320 corresponding to the initial position. During the unwinding process of the material roll, the first tab guide 400 leaves the initial position and rotates relative to the base 320. After the material roll is unwound and the splicing tape is replaced, the diameter of the material roll returns to the initial diameter, and the first tab guide 400 also needs to be rotated to the initial position. The reset position of the first tab guide 400 is determined by the reset detection component 600.

[0095] In this embodiment, the reset detection element 600 may be a photoelectric sensor.

[0096] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, in some specific embodiments of the present invention, the first tab guide 400 includes a guide plate 420 , and the guide plate 420 is spaced and tangentially arranged with respect to the first roller assembly 300 .

[0097] It is worth understanding that the guide plate 420 is arranged tangentially to the first roller 310 so that the distance between the guide plate 420 and the first roller 310 can allow the material belt 210 to pass through, and when the material belt 210 is attached to the first roller 310, the guide plate 420 plays a stable guiding role for the tab.

[0098] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, in some specific embodiments of the present invention, a warped portion 430 is provided on both sides of the guide plate 420 along the transmission direction of the material belt 210, and the warped portion 430 is arranged in a direction away from the first roller assembly 300.

[0099] It is worth understanding that the anti-warping portion 430 enlarges the distance between the guide plate 420 and the first roller 310, making it easier for the tab to gradually enter between the guide plate 420 and the first roller 310, and also making it easier for the tab to gradually move away from between the guide plate 420 and the first roller 310, effectively avoiding interference between the tab and the guide plate 420 and affecting the conveying of the material strip 210, and preventing the guide plate 420 from scratching the material strip 210 to protect the material strip 210.

[0100] Reference Figure 1 As shown, the unwinding detection device according to the second embodiment of the present invention includes: the unwinding device according to the first embodiment of the present invention, which specifically includes:

[0101] A plurality of roller assemblies are provided on the substrate 100 for receiving the material strip 210 , and the plurality of roller assemblies are sequentially counted as the Nth roller assembly along the direction of the material strip 210 , wherein when N=1, the roller assembly is the first roller assembly 300 ;

[0102] A plurality of tab guides are provided on the substrate 100 , each tab guide corresponding to each roller assembly, wherein the tab guide corresponding to the first roller assembly 300 is the first tab guide 400 ;

[0103] The material feeding detection assembly is provided on the base plate 100 and is located between the first roller assembly 300 and the unwinding assembly 200, and is used to detect the material roll and the feeding of the first roller assembly 300;

[0104] The deflection correction detection assembly is provided on the substrate 100 and is located between the first roller assembly 300 and the second roller assembly, and is used to detect the position of the material strip 210 and the position of the tabs on the material strip 210;

[0105] The static elimination assembly 700 is disposed on the substrate 100 and is located behind the second roller assembly to eliminate static electricity on the surface of the material belt 210;

[0106] The dust removal detection component 800 is provided on the substrate 100 and is located behind the static elimination component 700 along the direction of the material belt 210, and is used to remove dust from the surface of the material belt 210;

[0107] The electrostatic detection component 900 is disposed on the substrate 100 and is located behind the dust removal detection component 800 along the direction of the material belt 210 to detect the electrostatic voltage of the material belt 210.

[0108] It is worth noting that a plurality of roller assemblies form a conveying path for the material strip 210, thereby tightening the material strip 210 and conveying it to the next winding step for winding the core. Tab guides are provided at each roller assembly, corresponding to the location where the material strip 210 is received by each roller assembly and the location of the tabs on the material strip 210, to guide the tabs on the material strip 210. During the process of loading the coil into the unwinding assembly 200, the loading detection assembly can detect the position of the coil and the feeding status of the first roller assembly 300 to detect whether the material strip 210 is wrinkled. After the loading detection, the material strip 210 passes through the first roller assembly 300, and the position of the material strip 210 along the axial direction of the roller assembly is detected by the deviation correction detection component. The position of the material strip 210 along the axis of the roller assembly can be adjusted to align the material strip 210 on the roller assembly. The tab positions on the material strip 210 are also detected to detect whether the tabs are folded. After the inspection, the static electricity generated by the friction of the material strip 210 is eliminated by the static electricity elimination component 700, which can be specifically performed by a high-voltage ion wind rod. The surface of the material strip 210 is then dusted by the dust removal component, which can be specifically performed by removing the dust on the surface of the material strip 210 through a slit air knife. After the dust removal, the voltage of the static electricity on the material strip 210 is detected, and the wind speed of the high-voltage ion wind rod is adjusted. The inspection of the material strip 210 is realized. It is convenient to carry out the subsequent winding process of the qualified material strip 210, and at the same time, the unqualified material strip 210 can be recorded and picked out to improve the yield rate of the core.

[0109] According to the angle adjustment method of the third embodiment of the present invention, using the unwinding device of the first embodiment of the present invention, it specifically includes:

[0110] Set up a coordinate system to determine the radial size of the first roller assembly 300, the coordinates of the roller center of the first roller assembly 300, and the coordinates of the center of the roll on the unwinding assembly 200, and use the roll detection component to detect the radial size of the roll in real time;

[0111] Substitute the above numerical values ​​into the equation to calculate the tangent equation between the roller of the first roller assembly 300 and the material roll, and calculate its slope. According to the inverse trigonometric function, the inclination angle of the slope in the coordinate system is calculated to be α. The adjustment assembly 500 adjusts the inclination angle β of the first tab guide 400 in the coordinate system so that β=α.

[0112] Among them, β and α both have certain errors in actual production. Therefore, β=α does not mean that β and α are completely equal, but that the values ​​of β and α are similar and can fluctuate within a certain error range.

[0113] It is worth understanding that, based on the change in the radial size of the material roll when it is unwound, the slope change value of the material roll is calculated in real time, and then the inclination angle β of the first pole tab guide 400 in the coordinate system is adjusted, so that the inclination angle of the first pole tab guide 400 is equal to the inclination angle of the material strip 210, which facilitates the first pole tab guide 400 to dynamically correct the pole tabs on the material strip 210, automatically corresponding to the material strip 210 of the material roll, and the correction is more accurate.

[0114] Specifically, when the radius of the first roller 310 , the center coordinates of the first roller 310 , and the center coordinates of the roll on the unwinding assembly 200 remain unchanged, only the roll diameter gradually decreases as the unwinding assembly 200 unwinds.

[0115] Assume that the center coordinates of the web are (X01, Y01) and the web radius is R01; the axis coordinates of the first roller 310 are (X02, Y02) and the roller radius is R02. Then, the equations of the circles with coordinates (X1, Y1) and (X2, Y2) on the web circle are:

[0116] (X1-X01)^2+(Y1-Y01)^2=R01^2

[0117] (X2-X02)^2+(Y2-Y02)^2=R02^2

[0118] Assume that the equation of the common tangent of the two circles is Y=kX+b, then:

[0119]

[0120] The solution is: A1b=C1k or A2b=C2k, where A1 and C1, A2 and C2 are constants obtained by solution. Since there may be multiple common tangents, there are multiple solutions.

[0121] Substituting A1b=C1k or A2b=C2k into the equations of the two circles can obtain the solution set of the common tangent equations k and b.

[0122] According to the actual roller layout, the slope k of the corresponding inner common tangent or outer common tangent is taken. The inclination angle of the tangent can be calculated by inverse trigonometric function, and the angle at which the first tab guide 400 needs to be adjusted can be obtained.

[0123] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A reeling device, characterized in that: include: substrate; an unwinding assembly, disposed on the substrate, for unwinding the material roll into a material tape; A first roller assembly is provided on the substrate and is used to receive the material tape of the unwinding assembly; A material roll detection component is provided on the substrate and is used to detect the radial size of the material roll on the unwinding assembly; A first tab guide is provided on the first roller assembly, located outside the first roller assembly, and can correspond to the position of the tab on the material strip at the receiving portion of the first roller assembly; an adjusting assembly electrically connected to the material coil detection component and transmission-connected to the first tab guide, for driving the first tab guide to rotate around the axis of the first roller assembly to an angle consistent with the inclination angle of the material strip; Among them, the adjustment component obtains the inclination angle of the material strip based on the radial size of the material roll detected by the material roll detection component and the radial size of the first roller assembly, and adjusts the inclination angle of the first pole lug guide according to the inclination angle of the material strip.

2. The unwinding device according to claim 1, characterized in that: The first roller assembly includes a first roller and a base, the base is fixedly set on the substrate, the first roller is set on the base and can rotate around its axis, the first tab guide is set on the same rotating axis as the first roller, located on the outside of the first roller, corresponding to the position of the first roller receiving the material strip and the tab position of the material strip.

3. The unwinding device according to claim 2, characterized in that: The adjusting assembly includes a driving member and a rotating shaft. The driving member is fixedly arranged on the base and is electrically connected to the material roll detection member. The rotating shaft is transmission-connected to the driving member and rotates around its axis under the drive of the driving member. The rotating shaft is rotationally arranged on the base, and the first roller is coaxially sleeved on the rotating shaft and is smoothly rotationally connected to the first roller. The rotating shaft is transmission-connected to the first tab guide to drive the first tab guide to rotate.

4. The unwinding device according to claim 1, characterized in that: The coil detection element is used to detect the coil diameter or coil radius.

5. The unwinding device according to claim 3, characterized in that: It also includes at least one reset detection member, which is arranged on the base, and a detection channel is provided on the side of the reset detection member away from the axis of the first roller, and the detection channel is arranged along the circumferential direction of the first roller. The first tab guide is provided with a sensing member, and the sensing member is arranged along the axial direction of the first tab guide and extends to the detection channel. A turning part is provided at the corresponding position of the sensing member and the detection channel, and the turning part extends toward the detection channel for detection by the detection channel.

6. The unwinding device according to any one of claims 1 to 5, characterized in that: The first tab guide comprises a guide plate, and the guide plate is arranged tangentially to the first roller assembly at an interval.

7. The unwinding device according to claim 6, characterized in that: The guide piece is provided with a warped portion on both sides along the material belt transmission direction, and the warped portion is arranged in a direction away from the first roller assembly.

8. The unwinding device according to any one of claims 2 to 5, characterized in that: The first tab guide is arranged to extend from both ends of the first roller along the axial direction of the first roller.

9. A reel detection device, characterized in that: include: The unwinding device according to any one of claims 1 to 8, further comprising: A plurality of roller assemblies are provided on the substrate and are used to receive the material strip. The plurality of roller assemblies are counted sequentially as the Nth roller assembly along the direction of the material strip. When N=1, the roller assembly is the first roller assembly. A plurality of tab guides are provided on the substrate, each tab guide corresponding to each roller assembly; A material feeding detection assembly is provided on the substrate and is located between the first roller assembly and the unwinding assembly, and is used to detect the material roll and the feeding of the first roller assembly; A deflection correction detection assembly is provided on the substrate and is located between the first roller assembly and the second roller assembly, and is used to detect the position of the material strip and the position of the upper tab of the material strip; An electrostatic elimination component is provided on the substrate and is located behind the second roller assembly, and is used to eliminate static electricity on the surface of the material belt; A dust removal detection component is provided on the substrate and is located behind the static elimination component along the material strip direction, and is used for removing dust from the material strip surface; The residual static electricity detection component is arranged on the substrate and is located behind the dust removal detection component along the material belt direction, and is used to detect the static electricity voltage of the material belt.

10. An angle adjustment method, characterized in that: The unwinding device according to any one of claims 1 to 8 specifically comprises: Set up a coordinate system to determine the radial size R02 of the first roller assembly, the center coordinates (X02, Y02) of the roller of the first roller assembly, and the center coordinates (X01, Y01) of the roll on the unwinding assembly, and use the roll detection component to detect the radial size R01 of the roll in real time; The equations of the circles with coordinates (X1, Y1) on the roll circle and (X2, Y2) on the roller circle are: (X1-X01)^2+(Y1-Y01)^2=R01^2 (X2-X02)^2+(Y2-Y02)^2=R02^2 The tangent equation between the roller of the first roller assembly and the material roll is Y=kX+b, then: According to the equation, the slope k of the material strip between the material roll and the first roller assembly is calculated. According to the inverse trigonometric function, the inclination angle of the slope of the material strip in the coordinate system is calculated to be α. The adjustment component adjusts the inclination angle β of the first tab guide in the coordinate system so that β=α.

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