Pole lug dislocation correction device

Abstract

The tab dislocation correction device comprises a winding needle and a blanking clamping needle, the winding needle is used for winding a winding core, and a groove is formed in the peripheral surface of the winding needle; the discharging clamping needle is contained in the groove and abuts against the innermost layer wound by the winding core, and the discharging clamping needle is at least configured to drive at least the innermost layer of the winding core to rotate around the axis of the winding needle relative to the winding needle in the groove so as to correct the dislocation amount of the electrode lug of the winding core. Therefore, according to the pole lug dislocation correction device, the discharging clamping needle abuts against the winding innermost side of the winding core and then rotates, the position of the pole piece on the innermost side changes slowly relative to the position of the pole piece on the outer side, and therefore the purposes of adjusting the position of the pole lug and solving the problem of pole lug dislocation can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a device for correcting electrode misalignment. Background Technology

[0002] With the development of the lithium battery industry, the requirements for lithium battery capacity and safety performance are increasing, leading to a continuous increase in the number of winding layers in wound cells. However, since the thickness of the electrode itself is not fixed, and the thickness and feed position change caused by electrode and separator material changes during the winding process, the electrode spacing design after the cell is wound cannot fully meet the specifications, resulting in electrode misalignment. Such cells cannot be further ultrasonically welded and are therefore scrapped, greatly increasing manufacturing costs.

[0003] Therefore, how to correct misaligned tabs in the core is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a tab misalignment correction device that can solve the problem of tab misalignment in the winding core.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A tab misalignment correction device, comprising:

[0007] A winding needle is used to wind a core, and the outer peripheral surface of the winding needle is provided with a groove;

[0008] A feeding clamp needle is received within the groove and abuts against the innermost layer of the winding core. The feeding clamp needle is configured to at least drive at least the innermost layer of the winding core to rotate relative to the winding needle about the axis of the winding needle within the groove, so as to correct the misalignment of the tabs of the winding core.

[0009] Optionally, the above-mentioned electrode misalignment correction device further includes:

[0010] The testing mechanism has the corresponding tabs of the winding core disposed on the feeding clamp needle;

[0011] The drive mechanism is connected to the feeding clamp needle drive;

[0012] The detection mechanism is configured to detect the misalignment of the tab and transmit the detection signal and correction data to the drive mechanism of the feed clamp needle, so that the feed clamp needle drives at least the innermost layer of the core to rotate relative to the winding needle about the axis of the winding needle, thereby correcting the misalignment of the tab; the drive mechanism is configured to receive the detection signal and correction data from the detection mechanism and drive the feed clamp needle to rotate relative to the winding needle to correct the misalignment of the tab.

[0013] Optionally, in the above-mentioned tab misalignment correction device, the feed clamp needle includes a first part and a second part connected to each other, the first part is accommodated in the groove, the second part protrudes from the coil needle along the axial direction of the coil needle, and the first part abuts against the innermost layer of the coil core.

[0014] Optionally, in the above-mentioned tab misalignment correction device, the second part includes a first bending part and a second bending part, wherein one end of the first bending part is connected to the first part, and the other end of the first bending part extends radially toward the axis of the winding needle and is connected to one end of the second bending part, and the other end of the second bending part extends axially toward the winding needle in a direction away from the winding needle.

[0015] Optionally, in the above-mentioned tab misalignment correction device, along the axial direction of the winding needle, there is a gap between the first bent portion and the winding needle;

[0016] And / or, along the radial direction of the coil needle, there is a gap between the first portion and the coil needle.

[0017] Optionally, in the above-mentioned tab misalignment correction device, the feeding clamp needle has at least a buffer layer on the contact surface between the first part and the winding core.

[0018] Optionally, in the above-mentioned tab misalignment correction device, the number of the grooves is even, two adjacent grooves are spaced apart along the circumference of the winding needle, and all the grooves are symmetrically arranged along the axial section of the winding needle through the center, and there is a groove along the circumference of the winding needle that is 180° away from it.

[0019] And / or, when the grooves comprise two, the two grooves are symmetrically arranged along the axial section of the winding needle through the center and are 180° apart from each other, and the grooves are spaced apart from the innermost starting end of the winding core.

[0020] Optionally, in the above-described tab misalignment correction device, the central angle corresponding to the groove on the radial section of the coiling needle is 15° to 45°.

[0021] Optionally, in the above-described tab misalignment correction device, the size of the groove along the axial direction of the coil needle is not less than 4 / 5 of the size of the coil needle.

[0022] Optionally, in the above-mentioned electrode misalignment correction device, the maximum width of the first part of the feeding clamp needle is 1 / 10 to 1 / 3 of the arc length of the bottom of the groove.

[0023] As can be seen from the above technical solution, this utility model utilizes the feeding clamp needle to abut against the innermost side of the winding core, and then rotates, so that the position of the innermost electrode sheet relative to the outermost electrode sheet gradually changes, thereby achieving the purpose of adjusting the position of the electrode tab and solving the problem of electrode tab misalignment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the electrode misalignment correction device provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the coiling needle and the feeding clamping needle provided in the embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the feeding clamp provided in an embodiment of the present utility model;

[0028] Figure 4 A schematic diagram of the structure of the core provided in an embodiment of this utility model.

[0029] in:

[0030] 1. Coiling needle; 11. Groove; 2. Core; 21. Electrode tab;

[0031] 3. Feeding clamp; 31. First part; 32. Second part; 321. First bending part;

[0032] 322. Second bend. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not 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 this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Lithium-ion batteries mainly consist of a cathode, anode, electrolyte, and separator. The rapid development of lithium-ion battery technology has placed higher demands on manufacturing processes. There are two main methods for producing lithium battery cells: wound cells and stacked cells. In the winding process, the anode and cathode plates and the upper and lower separators are rotated by a winding needle 1 to form a circular cell prototype. Then, the unloading needle 3 clamps and opens the cell in the opposite direction, determining the cell's radius (R-angle), size, and shape. The radius (R-angle) refers to the shape formed after the core 2 is unloaded from the winding needle 1 by the unloading needle 3, and after the unloading needle 3 laterally expands and opens the cell, along with pre-pressurization.

[0036] like Figures 1 to 4 As shown, this utility model embodiment provides a pole tab 21 misalignment correction device, which can solve the problem of pole tab 21 misalignment in the core 2.

[0037] First, the electrode tab 21 misalignment correction device includes a winding needle 1 and a feeding clamp needle 3. The winding needle 1 is used to wind the core 2, and a groove 11 is provided on the outer circumferential surface of the winding needle 1. The feeding clamp needle 3 is accommodated in the groove 11 and abuts against the innermost layer of the core 2, that is, the feeding clamp needle 3 is tightly attached to the innermost ring of the battery cell. The feeding clamp needle 3 is configured to drive at least the innermost layer of the core 2 to rotate relative to the winding needle 1 about the axis of the winding needle 1 within the groove 11, so as to correct the misalignment of the electrode tab 21 of the core 2. Thus, by controlling the feeding clamp needle 3 to insert into the groove 11 of the winding needle 1, and then controlling the pressure of the feeding clamp needle 3 on the innermost layer of the battery cell, the rotation angle of the battery cell is corrected by the feeding clamp needle 3, ultimately causing a relative positional change between the inner and outer layers of the battery cell, thereby realizing the adjustment of the electrode tab 21 position. It should be noted that during the winding process, the tab 21 may be misaligned along the winding direction of the electrode (i.e., "I-shaped" misalignment) or misaligned along the winding axis of the electrode ("U-shaped" misalignment). The tab 21 misalignment correction device provided in this embodiment mainly corrects the "I-shaped" misalignment of the tab 21. It should also be noted that the groove 11 of the winding needle 1 does not affect the normal winding and unloading of the battery cell.

[0038] As can be seen, in this embodiment of the utility model, the feeding clamp needle 3 abuts against the innermost side of the winding core 2, and then rotates, so that the position of the innermost electrode sheet relative to the outermost electrode sheet changes slowly, thereby achieving the purpose of adjusting the position of the electrode tab 21 and solving the problem of electrode tab 21 misalignment.

[0039] In specific implementation, the device also includes a detection mechanism and a driving mechanism. The detection mechanism is positioned on the feed clamp 3 corresponding to the tab 21 of the core 2. The driving mechanism is connected to the feed clamp 3. The detection mechanism is configured to detect the misalignment of the tab 21 and transmit the detection signal and correction data to the driving mechanism of the feed clamp 3, causing the feed clamp 3 to rotate at least the innermost layer of the core 2 relative to the winding needle 1 around its axis, thereby correcting the misalignment of the tab 21. The driving mechanism is configured to receive the detection signal and correction data from the detection mechanism and drive the feed clamp 3 to rotate relative to the winding needle 1 to correct the misalignment of the tab 21. It should be noted that this device is used in cores 2 that have already been wound and exhibit a "one-line" misalignment, thus rescuing some cells that are scrapped due to tab 21 misalignment, thereby reducing scrap and lowering production costs.

[0040] Furthermore, the detection mechanism is integrated inside the feeding clamp needle 3. The detection mechanism includes a camera for detecting the misalignment length of the misaligned tabs 21 after winding and an identification device for the spacing of the misaligned tabs 21. It transmits the misalignment judgment, misalignment amount data, and real-time corrected misalignment data to the drive mechanism of the feeding clamp needle 3. The rotation of the feeding clamp needle 3 is based on the corresponding corrected rotation amount and angle calculated and transmitted from the detection data of the drive mechanism and the detection mechanism. The correction amount is adjusted in real time. After the drive mechanism of the feeding clamp needle 3 applies a certain pressure to the battery cell according to the angle (i.e., the feeding clamp needle 3 is inserted into the groove 11 and a certain pressure is applied from the inside to the outside in the radial direction of the winding needle 1 by the drive mechanism), the feeding clamp needle 3 begins to rotate. After the correction is completed, the feeding clamp needle 3 removes the battery cell, straightens it horizontally, expands outward to form a new R angle, and then sends it to the pre-pressing station for pre-pressing and shaping. After correcting and salvaging a misaligned battery cell, the cell's radius (R-angle) can be re-fixed and the cell cut to size, completely eliminating the damage to the R-angle and the impact on cell size and performance caused by other corrections of misalignment.

[0041] The driving mechanism includes, but is not limited to, a motor; the detection mechanism includes, but is not limited to, a laser infrared detector. The laser infrared detector is located at the end of the feeding clamp needle 3. The laser emitted by the laser infrared detector is perpendicular to the direction of the battery cell winding. During the measurement before correction, when the winding needle 1 returns to the correct direction after winding the battery cell and applying adhesive, the feeding clamp needle 3 reflects and senses the misaligned battery cell tab 21. While sensing whether there is a tab 21, the feeding clamp needle 3 corrects the angle misalignment, calculates the amount of tab 21 misalignment and the correction amount, and outputs the results. At the same time, during the correction and rotation of the battery cell, the reflection of the laser by the misaligned tab 21 continuously corrects the battery cell. When the laser detects that the total length of the tab 21 meets the design requirements, the correction is completed and the battery cell is fed. It should be noted that the driving mechanism can either drive the movement and rotation of the feeding clamp needle 3 independently, or it can drive both the feeding clamp needle 3 and the winding needle 1, that is, the feeding clamp needle 3 and the winding needle 1 share a single driving mechanism.

[0042] In practice, after the electrode sheet and diaphragm are wound on the winding needle 1, the outer layer of the battery cell is fixed with adhesive by the adhesive roller. At this time, the detection mechanism of the equipment detects the total length of the tab 21. Based on the misalignment spacing and total misalignment of the tab 21, the misalignment type of the tab 21 is first determined: it is divided into "I-shaped" misalignment and "U-shaped" misalignment. Only the I-shaped misalignment is corrected. At the same time, while the misalignment is corrected by the feeding clamp needle 3, the misalignment of the misaligned battery cell is calculated. After converting the misalignment of the tab 21 into a misalignment angle, it is transmitted to the feeding clamp needle 3. The rotary motor drives the feeding clamp needle 3 to rotate. In conjunction with the groove 11 reserved on the upper part of the battery cell winding needle 1, the misalignment of the tab 21 is corrected, thereby rescuing a certain misaligned battery cell. While the correction amount is calculated, the correction is performed. The number of rotations of the winding needle 2 and the correction amount and total correction angle of the feeding clamp needle 3 in the rotating groove 11 are calculated. Finally, the correction is completed.

[0043] In practice, after the misalignment correction of the battery cell is completed, the position of the feeding clamp 3 has changed relative to the original position. After the feeding clamp 3 is opened and pre-pressed, the R-angle of the battery cell also changes with the new feeding position. Therefore, the distance between the changed R-angle and the battery cell tab 21 will meet the design specifications, and the normal feeding process of the battery cell is completed.

[0044] In practice, the feeding clamp needle 3 includes a first part 31 and a second part 32 connected to each other. The first part 31 is accommodated in the groove 11, and the second part 32 protrudes from the winding needle 1 along the axial direction of the winding needle 1. The first part 31 abuts against the innermost layer of the winding core 2. The detection mechanism is located in the second part 32 to facilitate sensing the positional relationship of the electrode tab 21.

[0045] For specific implementation details, please refer to [link / reference]. Figure 3 The second part 32 includes a first bending part 321 and a second bending part 322. One end of the first bending part 321 is connected to the first part 31, and the other end of the first bending part 321 extends radially toward the axis of the winding needle 1 and connects to one end of the second bending part 322. The other end of the second bending part 322 extends axially away from the winding needle 1. Therefore, the feeding clamp needle 3 has a Z-shaped structure to prevent the second bending part 322 from contacting the electrode tab 21 during rotation, thus avoiding affecting the quality of the electrode tab 21. A detection mechanism is located in the second bending part 322 to facilitate sensing the positional relationship of the electrode tab 21.

[0046] In specific implementation, along the axial direction of the coil needle 1, there is a gap between the first bent portion 321 and the coil needle 1 to prevent the first bent portion 321 of the feed clamp needle 3 from contacting the coil needle 1 and affecting the rotation of the first bent portion 321 along the axial direction of the coil needle 1; and / or, along the radial direction of the coil needle 1, there is a gap between the first part 31 and the coil needle 1 to prevent the first part 31 of the feed clamp needle 3 from contacting the coil needle 1 and affecting the rotation of the first part 31 within the groove 11 along the axial direction of the coil needle 1.

[0047] In specific implementation, the feeding clamp 3 has a buffer layer at least on the contact surface between the first part 31 and the core 2. That is, the buffer layer is provided in the first part 31 and not in the second part 32; or, the buffer layer is provided in the first bending part 321 of the first part 31 and the second part 32 and not in the second bending part 322 of the second part 32; or, the buffer layer is provided in the first part 31 and the second bending part 322 of the second part 32 and not in the first bending part 321 of the second part 32; or, the buffer layer is provided in both the first part 31 and the second part 32. It should be noted that the buffer layer ensures that the pressure on the battery cell during the correction process by the feeding pin 3 is not too high, while still allowing for correction. The buffer layer increases the contact area between the outer ring of the feeding pin 3 and the battery cell, reducing the linear pressure of the feeding pin 3 on the battery cell during correction. Furthermore, it increases friction on the battery cell surface, mitigating impact during correction and reducing damage. Simultaneously, it prevents situations where the friction between the two is too low (i.e., the feeding pin 3 is too smooth), which could lead to the feeding pin 3's rotation not driving the inner side of the winding core 2 to rotate, or the feeding pin 3's rotation not being synchronized with the inner side of the winding core 2, resulting in misalignment of the tab 21 that cannot be corrected or a prolonged correction process. In addition, the buffer layer includes, but is not limited to, the adhesive layer.

[0048] In specific implementation, the number of grooves 11 is even, with adjacent grooves 11 spaced apart along the circumference of the winding needle 1. All grooves 11 are symmetrically arranged along the axial section of the winding needle 1 passing through its center, and there are grooves 11 at 180° intervals along the circumference of the winding needle 1. This ensures more uniform force distribution on the innermost coil of the electrode sheet, preventing electrode deformation; and / or, see details. Figure 2 When there are two grooves 11, the two grooves 11 are symmetrically arranged along the axial section of the winding needle 1 passing through the center and are 180° apart from each other. The grooves 11 are also spaced apart from the innermost starting end of the winding core 2. This ensures the stability of the winding needle 1 in winding the normal battery cell and prevents the winding of the winding core 2 from being affected if the grooves 11 are located at the innermost starting end of the winding core 2. Furthermore, the grooves 11 on the winding needle 1 for inserting the feeding clamp needle 3 are designed to be far from the initial feeding position during electrode winding. Simultaneously, the two grooves 11 are symmetrically spaced apart, i.e., designed at a 90° angle to the initial feeding position. See details. Figure 1 This prevents misalignment and other problems caused by fluctuations in the initial stage of electrode diaphragm feeding and winding. A 90° position has minimal impact on the initial electrode feeding and normal winding process. However, it is not limited to this; the groove 11 on the winding needle 1 for inserting the feeding clamp needle 3 should be positioned far from the initial feeding position during electrode winding. The angle between this angle and the initial feeding position can be greater than or less than 90 degrees. Those skilled in the art can design the specific angle according to actual needs.

[0049] In specific implementation, the central angle corresponding to the groove 11 on the radial cross-section of the coiling needle 1 is between 15° and 45°. That is, the adjustment of the misalignment of the electrode tab 21 is between 15° and 45°. The central angle corresponding to the groove 11 can be any one or any two of the following: 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, etc. This avoids the problem of insufficient rotation of the feeding clamp needle 3 due to too small a central angle, and also avoids the situation where the circumferential structural strength of the coiling needle 1 weakens due to too large an angle.

[0050] In specific implementation, the size of the groove 11 along the axial direction of the winding needle 1 is not less than 4 / 5 of the size of the winding needle 1. This ensures that the feeding clamp needle 3 and the winding core 2 have sufficient contact area. Sufficient contact area is necessary to prevent wrinkling or other issues from occurring on the innermost electrode sheet during its relative movement with respect to the outermost electrode sheet. It should be noted that when the ratio of the size of the groove 11 to the size of the winding needle 1 is 1, the groove 11 is a through groove along the axial direction of the winding needle 1.

[0051] In specific implementation, the maximum width of the first part 31 of the feeding clamp 3 is 1 / 10 to 1 / 3 of the arc length of the bottom of the groove 11. On the one hand, this ensures the contact area between the feeding clamp 3 and the battery cell, and on the other hand, it ensures that the feeding clamp 3 has sufficient rotation space within the groove 11.

[0052] In practice, different models of battery cells correspond to different sizes of winding needles 1 and different sizes of feeding clamp needles 3. To improve the upper limit of correction, the feeding clamp needle 3 is designed to repeat the correction process, achieving a large-angle correction effect within the fixed groove 11 of the winding needle 1. Combined with real-time calculation of the correction amount of the tab 21, the final correction is completed. For example, the feeding clamp needle 3 moves radially along the winding needle 1 under the drive mechanism until it contacts the battery cell. Then, the feeding clamp needle 3 rotates clockwise around the winding core 2 within the groove 11. When the rotation reaches its limit but still does not reach the target correction amount, the feeding clamp needle 3 moves radially until the battery cell separates. Then, it rotates counterclockwise around the winding core 2 to its limit, and then moves radially until it contacts the battery cell. Finally, the feeding clamp needle 3 rotates clockwise around the winding core 2 within the groove 11 to adjust the misalignment amount. This process is repeated until the target correction amount is reached. It should be noted that clockwise and counterclockwise in the text are just different ways of describing the direction of rotation. It does not mean that the feeding clamp 3 must rotate clockwise after contacting the battery cell. Counterclockwise rotation is also possible. However, when the feeding clamp 3 rotates counterclockwise after contacting the battery cell, the direction of rotation of the feeding clamp 3 after separating from the battery cell is clockwise.

[0053] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for correcting electrode misalignment, characterized in that, include: A winding needle (1) is used to wind a core (2), and the outer peripheral surface of the winding needle (1) is provided with a groove (11); A feeding clamp (3) is housed in the groove (11) and abuts against the innermost layer of the core (2) being wound. The feeding clamp (3) is configured to at least drive at least the innermost layer of the core (2) to rotate relative to the winding needle (1) about the axis of the winding needle (1) within the groove (11) to correct the misalignment of the tabs (21) of the core (2).

2. The electrode misalignment correction device according to claim 1, characterized in that, Also includes: The testing mechanism is provided on the feed clamp (3) corresponding to the tab (21) of the core (2); The drive mechanism is driven and connected to the feeding clamp (3); The detection mechanism is configured to detect the misalignment of the tab (21) and transmit the detection signal and correction data to the drive mechanism of the feed clamp (3) so that the feed clamp (3) drives at least the innermost layer of the core (2) to rotate relative to the winding needle (1) about the axis of the winding needle (1) to correct the misalignment of the tab (21); the drive mechanism is configured to receive the detection signal and correction data from the detection mechanism and drive the feed clamp (3) to rotate relative to the winding needle (1) to correct the misalignment of the tab (21).

3. The electrode misalignment correction device according to claim 2, characterized in that, The feeding clamp (3) includes a first part (31) and a second part (32) connected to each other. The first part (31) is accommodated in the groove (11), and the second part (32) protrudes from the coiling needle (1) along the axial direction of the coiling needle (1). The first part (31) abuts against the innermost layer of the coiling core (2).

4. The electrode misalignment correction device according to claim 3, characterized in that, The second part (32) includes a first bending part (321) and a second bending part (322), wherein one end of the first bending part (321) is connected to the first part (31), and the other end of the first bending part (321) extends radially toward the axis of the coiling needle (1) and is connected to one end of the second bending part (322), and the other end of the second bending part (322) extends axially toward the coiling needle (1) in a direction away from the coiling needle (1).

5. The electrode misalignment correction device according to claim 4, characterized in that, Along the axial direction of the coil needle (1), there is a gap between the first bent portion (321) and the coil needle (1); And / or, along the radial direction of the coiling needle (1), there is a gap between the first part (31) and the coiling needle (1).

6. The electrode misalignment correction device according to claim 3, characterized in that, The feeding clamp (3) has a buffer layer on the contact surface between the first part (31) and the core (2).

7. The electrode misalignment correction device according to claim 1, characterized in that, The number of grooves (11) is even. Two adjacent grooves (11) are spaced apart along the circumference of the coiling needle (1). All grooves (11) are symmetrically arranged along the axial section of the coiling needle (1) through the center. There are grooves (11) that are 180° apart from the coiling needle along the circumference of the coiling needle. And / or, when the groove (11) comprises two, the two grooves (11) are symmetrically arranged along the axial section of the winding needle (1) through the center and are 180° apart from each other, and the grooves (11) are spaced apart from the innermost starting end of the winding core (2).

8. The electrode misalignment correction device according to claim 1, characterized in that, On the radial section of the coiling needle (1), the central angle corresponding to the groove (11) is 15° to 45°.

9. The electrode misalignment correction device according to claim 1, characterized in that, Along the axial direction of the coiling needle (1), the size of the groove (11) is not less than 4 / 5 of the size of the coiling needle (1).

10. The electrode misalignment correction device according to claim 3, characterized in that, The maximum width of the first part (31) of the feeding clamp (3) is 1 / 10 to 1 / 3 of the arc length of the bottom of the groove (11).

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