CN219829672U - Coating dislocation detection device and coating equipment - Google Patents

Abstract

The utility model belongs to the technical field of battery processing equipment, and discloses a coating dislocation detection device and coating equipment. The utility model provides a positive and negative two sides coating thick liquids of electrode slice of electricity core, this coating dislocation detection device is used for detecting the alignment degree of positive and negative two sides thick liquids of electrode slice, including base and two detection component, detection component includes the push piece, detect piece and elastic component, push piece one end swing joint base, the detection piece is connected to the other end, two push pieces pass through the elastic component and connect, make two push pieces keep away from the one end of base and can be close to each other or keep away from, in order to drive two detection pieces and touch the positive and negative two sides of electrode slice respectively, when touching the electrode slice, two detection pieces are parallel and the tip aligns, in order to detect the alignment degree of positive and negative two sides coating thick liquids of electrode slice through the thick liquids trace on the detection piece. The coating dislocation detection device and the coating equipment provided by the utility model can realize rapid operation, visually compare the coating conditions of the front surface and the back surface of the pole piece, improve the detection accuracy, and have the advantages of simple structure and low manufacturing cost.

Description

Coating dislocation detection device and coating equipment

Technical Field

The utility model relates to the technical field of battery processing equipment, in particular to a coating dislocation detection device and coating equipment.

Background

The preparation of the lithium ion battery mainly comprises the working procedures of homogenization, coating, assembly and formation, wherein each working procedure is extremely important for the finished battery core, especially the homogenization and coating of the front working section, and the homogenization is to prepare pasty anode and cathode substances after mixing and stirring powdery anode and cathode active substances with a solvent and a binder; the coating is to uniformly coat the anode and cathode sizing agent on the surface of the foil, and the anode and cathode pole piece is manufactured after automatic drying.

In the preparation process, the quality of the working procedure of the front working section can directly influence the working procedure of the rear working section, for example, the front and back surfaces of the pole piece are positioned unevenly in the coating process, so that the problem of coating dislocation of the front and back surfaces can be caused, and a large number of pole pieces are scrapped; if the current is not found in time, the production is continued by using the electrode plates with staggered coating, and finally the situation that the anode cannot be completely covered by the cathode can be possibly caused, so that the safety performance of the battery cell is affected.

The existing detection method for the coating dislocation problem comprises manual detection and mechanical detection. The manual inspection is performed by an operator using a ruler, as shown in fig. 1, after the front and the back of the foil are coated, the margin L of the pole piece 100 is measured by the ruler 200, and the margin L of the front and the back is compared to determine whether the coating of the slurry 110 is dislocated. However, the manual measurement is adopted, so that the ruler 200 cannot be completely fixed, the measurement process is easy to shake, the result is error, and the visual dimension parameter process is error, so that the measurement error is large and is not visual. Meanwhile, coating is a continuous working process, and measurement cannot be performed by stopping, so that the straight ruler 200 is generally suspended, but the method is low in stability, long in measurement time and unfavorable for realization. Most of the existing mechanical detection is used for sensing coating positions through sensors and the like, and the device is complex and high in cost.

Disclosure of Invention

The utility model aims to provide a coating dislocation detection device and coating equipment, which can realize rapid operation, visually compare the coating conditions of the front surface and the back surface of a pole piece, improve the detection accuracy, and have simple structure and low cost.

To achieve the purpose, the utility model adopts the following technical scheme:

coating dislocation detection device, the positive and negative two sides of the pole piece coating thick liquids of electricity core for detect positive and negative two sides of pole piece the alignment degree of thick liquids includes:

a base;

the detection assembly is provided with two detection assemblies, each detection assembly comprises a pressing piece, a detection piece and an elastic piece, one end of each pressing piece is movably connected with the base, the other end of each pressing piece is connected with and drives the corresponding detection piece to move, the two pressing pieces are connected with each other through the elastic pieces, one ends of the pressing pieces, which are far away from the base, can be mutually close to or far away from each other, so that the two detection pieces can be driven to respectively touch the front surface and the back surface of the pole piece, and when touching the pole piece, the two detection pieces are mutually parallel and the ends of the detection pieces are aligned, so that the alignment degree of slurry coated on the front surface and the back surface of the pole piece can be detected through slurry traces on the detection pieces.

Optionally, the pressing piece includes first pressing piece and second pressing piece, the one end of first pressing piece is connected the base, the other end with the second pressing piece is connected, the detection piece connect in the second pressing piece, can pass through the pressing first pressing piece or the second pressing piece drives the detection piece motion.

Optionally, the first pressing piece with the second pressing piece sets up perpendicularly, two the second pressing piece parallel arrangement, two the first pressing piece all rotates to be connected the base and rotates in vertical plane, so as to drive the detection piece removes, makes two the detection piece is parallel and the tip aligns all the time.

Optionally, the device further comprises a limiting assembly, the limiting assembly comprises a limiting main body part and two limiting parts, the two limiting parts are respectively connected to the two pressing parts, one end of each limiting main body part is connected with the base, the other end of each limiting main body part is matched with the two limiting parts, the limiting main body parts are aligned with the pole pieces at the same height, the two limiting parts can be abutted to the limiting main body parts under the driving of the pressing parts, and the distances between the two limiting parts and the limiting main body parts are the same.

Optionally, the detecting piece includes the detecting roller, the locating part includes the locating roller, the circumference outer wall of locating roller with when spacing main part butt cooperation, two the minimum axle center distance of locating roller equals two the minimum axle center distance of detecting roller.

Optionally, the detection roller with the limiting roller wears to locate on the presser, the detection roller can be relative the presser rotates, the detection roller with the limiting roller interval sets up.

Optionally, the limiting member includes a flexible portion, so that the limiting body member can be embedded into an outer wall of the limiting member, and a radius of the limiting member is equal to a radius of the detecting member.

Optionally, the base includes base body and telescopic support piece, the one end of support piece is connected the base body, the other end is connected the detection component with spacing main part spare.

Optionally, a sticker is provided on the detecting member, and the sticker is adhered to the detecting member in a pasting manner so as to be torn off after detection.

The coating equipment comprises the coating dislocation detection device.

The beneficial effects are that:

according to the coating dislocation detection device, the detection component is supported by the base, so that the stability of the device is ensured; because the one end swing joint base of pressing piece, the detection spare is connected to the other end, support through the elastic component between two pressing pieces, thereby can be through pressing two pressing pieces in opposite directions, drive two detection pieces and be close to each other or keep away from, can keep being parallel to each other and under the prerequisite that the tip is aligned when guaranteeing that two detection pieces touch the pole piece, can be contacted the positive and negative two sides of pole piece respectively and be infected with thick liquids through two detection pieces, thereby can be after removing the pole piece, through the thick liquids trace of comparing stay on two detection pieces, detect whether the thick liquids of pole piece positive and negative two sides coating are aligned, the device's simple structure, low in manufacturing cost. The coating equipment comprises a coating dislocation detection device, and the coating dislocation detection device can realize detection only by quickly touching a detection piece and a pole piece, so that quick operation can be realized, the operation time is shortened, and the detection efficiency is improved; and the slurry coating conditions of the front surface and the back surface of the pole piece can be intuitively compared through the slurry trace comparison on the two detection pieces, so that the detection accuracy is improved.

Drawings

FIG. 1 is a schematic illustration of a prior art ruler measurement;

fig. 2 is a schematic diagram of a coating misalignment detecting apparatus according to an embodiment of the present utility model without a limiting component;

fig. 3 is a schematic diagram of a coating misalignment detecting apparatus according to an embodiment of the present utility model when no positioning component is provided;

FIG. 4 is a schematic diagram of coating alignment after detection of an unqualified component of a coating misalignment detection apparatus according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a coating misalignment after detection by an unqualified component of a coating misalignment detection apparatus according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of a limiting component of a coating misalignment detecting apparatus according to a first embodiment of the present utility model;

fig. 7 is a schematic diagram of a coating misalignment detecting apparatus according to an embodiment of the present utility model when detecting a positioning component;

fig. 8 is a schematic diagram of coating alignment after a limit component is provided for a coating misalignment detection apparatus according to a first embodiment of the present utility model;

fig. 9 is a schematic diagram of a coating misalignment after detection by a positioning component of a coating misalignment detection apparatus according to an embodiment of the present utility model;

fig. 10 is a schematic diagram of a coating misalignment detection apparatus according to a second embodiment of the present utility model;

fig. 11 is a schematic diagram of a coating misalignment detection apparatus according to a second embodiment of the present utility model;

fig. 12 is a schematic diagram of coating alignment of a coating misalignment detection apparatus according to a second embodiment of the present utility model;

fig. 13 is a schematic diagram of a coating misalignment detecting apparatus according to a second embodiment of the present utility model.

In the figure:

100. a pole piece; 110. a slurry; 200. a ruler;

1. a base; 11. a base body; 12. a support;

2. a detection assembly; 21. a pressing member; 211. a first pressing member; 212. a second pressing member; 22. a detecting member; 221. a slurry trace; 23. an elastic member;

3. a limit component; 31. a limit body member; 32. a limiting piece; 321. indentation.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

The coating equipment provided by the embodiment is used for performing a coating procedure on the foil in the battery preparation process of lithium batteries, sodium batteries and the like, and comprises a coating dislocation detection device.

As shown in fig. 2 to 5, since the slurry 110 is coated on both the front and back surfaces of the electrode sheet 100 of the battery cell, the coating misalignment detecting device (hereinafter simply referred to as "device") provided by the present utility model is used to detect the alignment degree of the slurry 110 coated on both the front and back surfaces of the electrode sheet 100.

The device includes base 1 and detection component 2, detection component 2 is equipped with two, detection component 2 includes pressing piece 21, detection piece 22 and elastic component 23, the one end swing joint base 1 of pressing piece 21, the other end is connected and is driven detection piece 22 and remove, connect through elastic component 23 between two pressing pieces 21, make two pressing pieces 21 keep away from the one end of base 1 and can be close to each other or keep away from, so as to drive two detection pieces 22 and can touch the tow sides of pole piece 100 respectively, and when touching pole piece 100, make two detection pieces 22 be parallel to each other and the tip aligns, in order to can detect the alignment degree of the thick liquids 110 of pole piece 100 tow sides coating through the thick liquids vestige 221 on the detection piece 22.

The device supports the detection component 2 through the base 1, and ensures the stability of the device so as to improve the accuracy in detection. Because the base 1 is movably connected to one end of each of the two pressing members 21, the detecting member 22 is connected to the other end of each of the two pressing members 21, and the two pressing members 21 are supported by the elastic member 23, the two detecting members 22 can be separated from each other when the two pressing members 21 are in the initial state, so that the pole piece 100 can be placed between the two detecting members 22 for detection. During detection, the two pressing pieces 21 are pressed in opposite directions, so that the elastic force of the elastic piece 23 is overcome, the two detection pieces 22 are driven to approach each other, and on the premise that the two detection pieces 22 are kept parallel to each other and the ends of the two detection pieces are aligned when touching the pole piece 100, the two detection pieces 22 can be respectively contacted with the front surface and the back surface of the pole piece 100 to be stained with the sizing agent 110, so that after the pole piece 100 is removed, sizing agent traces 221 remained on the two detection pieces 22 can be compared, and whether the sizing agent 110 coated on the front surface and the back surface of the pole piece 100 is aligned is detected. The device has simple structure and low manufacturing cost, can realize detection at any time, and is beneficial to finding out the coating dislocation problem of the pole piece 100 in time; the detection can be realized only by quickly touching the detection piece 22 and the pole piece 100, the applicability is good, the operation is simple, the quick operation can be realized, the operation time is reduced, and the detection efficiency is improved; in addition, by comparing the slurry traces 221 on the two detecting pieces 22, the coating conditions of the slurry 110 on the front and back sides of the pole piece 100 can be visually compared, the detection accuracy is improved, and the quality problem of the pole piece 100 is further reduced.

Preferably, the elastic member 23 may be a spring.

With continued reference to fig. 2-5, alternatively, the base 1 includes a base body 11 and a retractable support 12, one end of the support 12 being connected to the base body 11 and the other end being connected to the detection assembly 2 and the limit body 31.

The shape and the position of the base body 11 can be set according to the needs, and the base body 11 can be fixedly arranged at a preset position, so that the stability can be improved, and the reliability and the accuracy in the detection of the alignment degree of the sizing agent 110 on the front surface and the back surface of the pole piece 100 are ensured. The supporting member 12 may be a supporting rod so as to provide a space for the detecting assembly 2 above the base body 11, so as to facilitate the movement of the pressing member 21 and the detecting member 22; the supporting piece 12 is of a telescopic structure, and the height of the detection assembly 2 is adjusted through the telescopic adjustment of the supporting piece 12, so that the detection assembly 2 can be adjusted to be suitable for the height of the pole piece 100, and the two detection pieces 22 can conveniently touch the pole piece 100 from the front side and the back side so as to detect the coating condition. It will be appreciated that the specific structure of the base 1 may be determined according to practical situations such as working conditions.

Alternatively, the pressing member 21 includes a first pressing member 211 and a second pressing member 212, one end of the first pressing member 211 is connected to the base 1, the other end is connected to the second pressing member 212, and the detecting member 22 is connected to the second pressing member 212, so that the detecting member 22 can be moved by pressing the first pressing member 211 or the second pressing member 212.

Specifically, the two second pressing pieces 212 are arranged in parallel in their initial state, and the two detecting pieces 22 connected thereto are aligned in parallel in their initial state with their ends aligned. The first pressing piece 211 is connected with the second pressing piece 212, and the first pressing piece 211 or the second pressing piece 212 can be selectively pressed according to actual situations, so that the two detecting pieces 22 can be parallel and aligned to the front side and the back side of the pole piece 100. In other embodiments, the first pressing member 211 may be slidably connected to the base 1, and due to the arrangement of the elastic member 23, the two detecting members 22 may be arranged at a predetermined distance from each other in the initial state, and the two first pressing members 211 may be manually pressed to slide on the base 1 in the vertical direction, so as to drive the two detecting members 22 to approach each other.

Alternatively, the first pressing members 211 are disposed perpendicular to the second pressing members 212, the two second pressing members 212 are disposed in parallel, and the two first pressing members 211 are both rotatably connected to the base 1 and rotate in a vertical plane to drive the detecting members 22 to move, so that the two detecting members 22 are always parallel and aligned at the end.

Since the first pressing pieces 211 are vertically fixed to the second pressing pieces 212, and the two second pressing pieces 212 are vertically disposed up and down in space and kept parallel, when the two first pressing pieces 211 are rotated in a vertical plane with respect to the base 1, it is ensured that the two second pressing pieces 212 and the detecting piece 22 connected thereto maintain an initial corresponding parallel state. In this embodiment, the end portions of the two first pressing members 211 are rotatably connected to the same position of the base 1, and can rotate around the base 1 along a vertical plane perpendicular to the second pressing members 212, so that the two detecting members 22 can move up and down in the vertical plane, and the relative clamping of the pole piece 100 is realized, and the touching and releasing actions are realized.

Optionally, a sticker is provided on the detecting member 22, and the sticker is adhesively attached to the detecting member 22 so as to be torn off after detection.

In order to enable the device to perform multiple detection and achieve the purpose of rapid detection, the present embodiment attaches a sticker to the detecting member 22, so that the paste 110 is stained on the sticker to compare the paste traces 221. After one test is completed, the sticker may be torn off directly and a new sticker may be attached, or a plurality of stickers may be attached to the test piece 22 in advance so as to perform multiple tests. The sticker is arranged in a sticking mode, so that the device adjustment time during each detection can be reduced, and the next detection can be performed only by tearing off the sticker.

Optionally, as shown in fig. 6 to 9, the device further includes a limiting component 3, where the limiting component 3 includes a limiting main body part 31 and two limiting parts 32, the two limiting parts 32 are respectively connected to the two pressing parts 21, one end of the limiting main body part 31 is connected to the base 1, and the other end is matched with the two limiting parts 32, so that the limiting main body part 31 and the pole piece 100 are aligned at the same height, the two limiting parts 32 can be abutted to the limiting main body part 31 under the driving of the pressing parts 21, and the distances between the two limiting parts 32 and the limiting main body part 31 are the same.

To avoid interference between the stopper body 31 and the elastic member 23, the connection between the first pressing member 211 and the second pressing member 212 may be located in different vertical planes from the stopper body 31; the first pressing member 211 and the limiting body member 31 may be disposed in different directions of the support member 12; the limiting body member 31 may be provided with a certain bending structure, so that the limiting body member 31 and the pressing member 21 may not interfere with each other even if they are positioned at the same connection point on the base 1, and the device may be used normally. Specifically, the limiting body member 31 and the pressing member 21 may have a rod-like structure, and the limiting body member 31 and the pressing member 21 may be connected to the supporting member 12 by screwing or the like.

During detection, the radial direction of the limiting main body piece 31 is horizontally aligned with the extending direction of the pole piece 100 and is not in contact with the extending direction of the pole piece 100, the height of the limiting main body piece 31 can be matched with the pole piece 100 by adjusting the height of the supporting piece 12, so that the converging height of the two detecting pieces 22 is the height of the pole piece 100, and the detecting pieces 22 can be attached to the surface of the pole piece 100. The limiting main body piece 31 plays a role in limiting excessive movement of the two detection assemblies 2, so that the two limiting pieces 32 can be converged and abutted at the middle position of the distance between the two limiting pieces, the moving distance of the two detection pieces 22 is the same, convenience in detection is improved, the detection pieces 22 can still be kept parallel after moving and the end parts are aligned, accuracy in comparison of the slurry marks 221 is guaranteed, and reliability in detection of the device is improved.

Optionally, the detecting member 22 includes detecting rollers, and the limiting member 32 includes limiting rollers, and when the circumferential outer wall of each limiting roller is in abutting engagement with the limiting body member 31, the minimum axial distance between the two limiting rollers is equal to the minimum axial distance between the two detecting rollers.

The minimum axial distance of the two limit rollers is the sum of the radius of the two limit rollers and the diameter of the limit main body part 31, and the minimum axial distance of the two limit rollers is the same as that of the two detection rollers, so that when the two limit parts 32 are in butt joint with the limit main body part 31 during pressing detection, the two detection parts 22 can reliably contact with the pole piece 100, and the problem that the detection parts 22 are not in touch with the pole piece 100 due to the butt joint of the limit parts 32 is avoided. It should be noted that the thickness of pole piece 100 is small and negligible with respect to the present device. Specifically, the detecting element 22 and the limiting element 32 may be made of rigid materials, and the circumferential outer wall of the detecting roller is contacted with the pole piece 100 through size fit. It should be noted that the inspection roller should have a good fit to enable the attachment to the pole piece 100 to be applied with the paste 110.

Optionally, the detecting roller and the limiting roller are arranged on the pressing piece 21 in a penetrating manner, the detecting roller can rotate relative to the pressing piece 21, and the detecting roller and the limiting roller are arranged at intervals.

Further, the second pressing member 212 is provided with a detection roller and a limit roller in a penetrating manner, so that the detection roller and the limit roller can be driven to move by pressing. The detection roller is rotatably arranged, and after the detection roller touches the pole piece 100, the slurry trace 221 on the detection roller can be rotated to a position convenient for observation. The limiting roller can be fixedly arranged to keep stability in limiting, and interference between the limiting roller and the detecting roller can be avoided because the limiting roller and the detecting roller are arranged at intervals.

When in coating, the coating width dimension and the margin left dimension L of the foil are adjusted, the coating equipment is operated to carry out coating, and the device can be used for detection after coating. The two pressing pieces 21 can be pressed in opposite directions by hands, so that the detecting pieces 22 touch the pole piece 100, and then the slurry marks 221 on the two detecting pieces 22 can be compared by loosening hands. If the two slurry traces 221 are parallel and coincide, as shown in fig. 4 and 8, the coating alignment is good, and no adjustment is needed; if the two slurry traces 221 are parallel but not overlapped, as shown in fig. 5 and 9, parameters such as size setting of the coating apparatus need to be adjusted in time to generate the coating dislocation problem. It should be noted that fig. 6 and 7 are schematic diagrams of the first view of the device, and fig. 8 and 9 are schematic diagrams of the second view of the device.

Example two

The coating misalignment detection apparatus provided in this embodiment is substantially the same as that in the first embodiment, except that: the setting of the stopper 32 is different.

As shown in fig. 10-13, wherein fig. 10 and 11 are schematic views of a first viewing angle, and fig. 12 and 13 are schematic views of a second viewing angle. Optionally, the stopper 32 includes a flexible portion so that the stopper body member 31 can be inserted into the outer wall of the stopper 32, and the radius of the stopper 32 is equal to the radius of the detecting member 22.

The flexible portion may be made of deformable foam, and may be disposed on the outer wall of the limiting member 32 and have a certain thickness, or the limiting member 32 may be made of a flexible portion completely, so that the limiting body member 31 may be sunk into the circumferential outer wall of the limiting member 32 when pressed with force to form the indentation 321. The material selected for the flexible portion must have a certain strength, and can play a role in blocking the limiting main body member 31 when the stress is small, and can enable the limiting main body member 31 to be embedded into the limiting member 32 when the stress is large. When detecting, if one of the limiting members 32 contacts the limiting body member 31 first, the limiting action of the limiting body member 31 will not move any more, and when the other limiting member 32 also contacts the limiting body member 31, the limiting body member 31 will be sunk into the flexible portion by continuing to exert force, so that the detecting member 22 can touch the pole piece 100. The thickness of the stopper body member 31 is compensated by embedding the stopper body member 31 into the stopper member 32 having the flexible portion to form the indentation 321, so that the radius of the stopper member 32 can be made equal to the diameter of the detecting member 22, and the detecting member 22 can be ensured to perform the detection reliably.

It can be understood that parameters such as the size, the shape and the like of each part structure of the device can be adjusted according to actual conditions, and corresponding functions can be realized.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Coating dislocation detection device, positive and negative two sides of pole piece (100) of electric core are scribbled thick liquids (110), its characterized in that is used for detecting positive and negative two sides of pole piece (100) the degree of alignment of thick liquids (110), include:

a base (1);

the detection assembly (2), detection assembly (2) are equipped with two, detection assembly (2) are including pressing piece (21), detection piece (22) and elastic component (23), the one end swing joint of pressing piece (21) base (1), the other end is connected and is driven detection piece (22) remove, two press and pass through between piece (21) elastic component (23) are connected, make two pressing piece (21) keep away from one end of base (1) can be close to each other or keep away from, so as to drive two detection piece (22) can touch respectively positive and negative both sides of pole piece (100), and when touching pole piece (100), make two detection piece (22) are parallel to each other and the tip is aligned, so as to pass through paste trace (221) on detection piece (22) detects the alignment degree of thick liquids (110) of positive and negative both sides coating of pole piece (100).

2. The coating misalignment detection apparatus according to claim 1, wherein the pressing member (21) includes a first pressing member (211) and a second pressing member (212), one end of the first pressing member (211) is connected to the base (1), the other end is connected to the second pressing member (212), and the detection member (22) is connected to the second pressing member (212) so as to be movable by pressing the first pressing member (211) or the second pressing member (212).

3. The coating misalignment detection apparatus according to claim 2, wherein the first pressing members (211) are disposed perpendicular to the second pressing members (212), the two second pressing members (212) are disposed in parallel, and the two first pressing members (211) are both rotatably connected to the base (1) and rotate in a vertical plane to drive the detection members (22) to move so that the two detection members (22) are always parallel and aligned at their ends.

4. The coating dislocation detection device according to claim 1, further comprising a limiting assembly (3), wherein the limiting assembly (3) comprises a limiting main body part (31) and two limiting parts (32), the two limiting parts (32) are respectively connected to the two pressing parts (21), one end of the limiting main body part (31) is connected with the base (1), the other end of the limiting main body part is matched with the two limiting parts (32), so that the limiting main body part (31) and the pole piece (100) are aligned at the same height, the two limiting parts (32) can be abutted to the limiting main body part (31) under the driving of the pressing parts (21), and the distances between the two limiting parts (32) and the limiting main body part (31) are the same.

5. The coating misalignment detection apparatus according to claim 4, wherein the detection member (22) includes a detection roller, the stopper (32) includes a stopper roller, and a minimum axial distance between two of the stopper rollers is equal to a minimum axial distance between two of the detection rollers when a circumferential outer wall of the stopper roller is in abutting engagement with the stopper main body member (31).

6. The coating misalignment detection apparatus according to claim 5, wherein the detection roller and the stopper roller are provided so as to penetrate through the pressing member (21), the detection roller is rotatable relative to the pressing member (21), and the detection roller and the stopper roller are provided at an interval.

7. The coating misalignment detection apparatus according to claim 4, wherein the stopper (32) includes a flexible portion so that the stopper main body member (31) can be fitted into an outer wall of the stopper (32), a radius of the stopper (32) being equal to a radius of the detecting member (22).

8. The coating misalignment detection apparatus according to claim 4, wherein the base (1) comprises a base body (11) and a telescopic support member (12), one end of the support member (12) is connected to the base body (11), and the other end is connected to the detection assembly (2) and the limiting body member (31).

9. The coating misalignment detection apparatus according to claim 1, wherein a sticker is provided on the detection member (22), the sticker being adhesively attached to the detection member (22) so as to be removable after detection.

10. Coating apparatus comprising a coating misalignment detection apparatus according to any one of claims 1 to 9.