Coating equipment and battery production line

Abstract

The utility model relates to coating equipment and a battery production line. The coating device comprises a first roller assembly, a second roller assembly, an elastic pad and a first driving mechanism. The first roller assembly comprises a first mounting seat and a working roller which is rotatably arranged on the first mounting seat around the axis parallel to the first direction; the second roller assembly comprises a second mounting seat and a supporting roller which is rotatably arranged on the second mounting seat around the axis parallel to the first direction; the first roller assembly and the second roller assembly are arranged in the second direction, and the first direction and the second direction intersect with each other. The elastic cushion is arranged between the first mounting base and the second mounting base in the second direction. The first driving mechanism is connected with the second mounting base so as to drive the second mounting base to move in the second direction. In the adjusting process of the working roller and the supporting roller, due to the fact that the elastic cushion can deform, machining adjustment of multiple times of thinning of the elastic cushion can be omitted, the debugging time of the coating equipment can be shortened, and the debugging efficiency of the coating equipment can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a coating device and a battery production line. Background Art

[0002] The production process of battery cells generally includes thinning the slurry corresponding to the active material layer using a coating device. However, the coating device of the related art has a problem of long debugging time. Utility Model Content

[0003] Based on this, it is necessary to provide a coating equipment and a battery production line to address the above technical problems. During the adjustment of the coating equipment, multiple processing adjustments of the elastic pad can be omitted, thereby shortening the debugging time of the coating equipment.

[0004] According to a first aspect of the present application, a coating apparatus is provided, comprising a first roller assembly, a second roller assembly, an elastic pad, and a first drive mechanism. The first roller assembly comprises a first mounting seat and a working roller rotatably mounted on the first mounting seat about an axis parallel to a first direction. The second roller assembly comprises a second mounting seat and a support roller rotatably mounted on the second mounting seat about an axis parallel to the first direction. The first roller assembly and the second roller assembly are arranged along a second direction, with the first direction and the second direction intersecting each other. The elastic pad is disposed between the first mounting seat and the second mounting seat along the second direction. The first drive mechanism is connected to the second mounting seat for driving the second mounting seat to move in the second direction.

[0005] In the technical solution of the present application, during the process of adjusting the coating equipment, such as during the process of adjusting the spacing between the working roller and the support roller along the second direction, and before setting the elastic pad, the first driving mechanism can be used to drive the second mounting seat to move along the second direction toward the side close to the first mounting seat, so that the working roller and the support roller can be brought into light contact, and the spacing between the first mounting seat and the second mounting seat along the second direction at this time is recorded as the first spacing, and then an elastic pad with a thickness greater than the first spacing is selected, and the first driving mechanism is used to drive the second mounting seat to move along the second direction toward the side away from the first mounting seat, and then the elastic pad is set between the first mounting seat and the second mounting seat along the second direction, and then the first driving mechanism is used to drive the second mounting seat along the second direction Move in the direction toward the side close to the first mounting seat, so that the working roller and the support roller touch each other lightly again, and the elastic pad can also be compressed. In this way, the multiple thinning processing adjustments of the elastic pad can be eliminated, and the adjustment operation of the working roller and the support roller can be completed, which is convenient for the subsequent use of the working roller to thin the slurry such as the initial active material layer. In the process of adjusting the working roller and the support roller, since the elastic pad can be deformed, the situation where the working roller and the support roller cannot contact each other due to non-elastic pads can be reduced, and the process of multiple thinning treatments of non-elastic pads (such as metal pads) due to the inability to contact between the working roller and the support roller can be eliminated, thereby shortening the debugging time of the coating equipment and improving the debugging efficiency of the coating equipment.

[0006] In one embodiment, the first roll assembly includes two first mounting seats disposed at opposite ends of the working roll along a first direction. The second roll assembly includes two second mounting seats disposed at opposite ends of the support roll along the first direction. The coating apparatus includes at least two elastic pads spaced apart along the first direction, one of the at least two elastic pads being disposed between the first mounting seat and the second mounting seat on one side along the first direction, and the other elastic pad being disposed between the first mounting seat and the second mounting seat on the other side along the first direction.

[0007] In this way, the two first mounting blocks can be used to improve the levelness and stability of the work roll, while the two second mounting blocks can be used to improve the levelness and stability of the backup roll. Furthermore, the elastic pads can be used to ensure gentle contact between the work roll and the backup roll, thereby shortening the commissioning time and improving the commissioning efficiency of the coating equipment. Furthermore, the use of at least two elastic pads can better support the backup roll relative to the work roll, thereby further reducing the probability of deflection of the work roll or the deformation rate of the work roll.

[0008] In one embodiment, the number of the elastic pads is an even number, and the even number of elastic pads are symmetrically distributed with the working roll as a reference object.

[0009] Since an even number of elastic pads are symmetrically distributed with the working roll as a reference object, the support roll can be used to better support the working roll, and the balance and reliability of the working roll can also be improved.

[0010] In one embodiment, the elastic pad is detachably disposed between the first mounting seat and the second mounting seat.

[0011] In this way, it is easy to disassemble, install or replace the elastic pad. For example, an elastic pad with a suitable elastic modulus can be selected according to the driving force applied to the second mounting seat by the first driving mechanism, so that the elastic pad can better meet the application requirements of the corresponding scenario, which can broaden the application range of the coating equipment to a certain extent.

[0012] In one embodiment, the elastic pad has a through hole, and the coating device further includes a connector and a fastener. The connector passes through the first mounting seat, the through hole and the second mounting seat, and the fastener is fastened to one end of the connector passing through the second mounting seat.

[0013] In this way, the connector can be positioned on the first mounting seat and the second mounting seat by the fastener, and the elastic pad can be detachably arranged between the first mounting seat and the second mounting seat by the connector and the fastener to facilitate removal, installation or replacement of the elastic pad.

[0014] In one embodiment, there are at least two fasteners, one fastener is fastened to one end of the connecting member passing through the second mounting seat, and the other fastener is fastened to one end of the connecting member passing through the first mounting seat.

[0015] In this way, the stability of the connection member positioned on the first mounting seat and the second mounting seat can be improved, and the stability of the elastic pad positioned between the first mounting seat and the second mounting seat can also be improved.

[0016] In one embodiment, the elastic pad is inserted between the first mounting seat and the second mounting seat along the first direction.

[0017] The elastic pad is installed between the first mounting seat and the second mounting seat in an inserting manner, which can improve the installation convenience of the elastic pad.

[0018] In one embodiment, the via hole is longitudinally extended along the first direction.

[0019] Since the through hole extends longitudinally along the first direction, the situation in which the connecting part is difficult to pass through the first mounting seat, the elastic pad and the second mounting seat due to processing errors of the first mounting seat, the second mounting seat and / or the elastic pad can be reduced, thereby improving the installation adaptability of the elastic pad.

[0020] In one embodiment, the elastic pad is provided with an even number of vias spaced apart along a third direction, wherein the first direction, the second direction, and the third direction intersect each other. The elastic pad and the even number of vias are symmetrically arranged with respect to a reference plane, wherein the reference plane is perpendicular to the third direction.

[0021] In this way, the stability and reliability of the elastic pad being clamped between the first mounting seat and the second mounting seat can be improved by an even number of connecting members and a corresponding number of fasteners.

[0022] In one embodiment, along the second direction, the elastic pad has a first contact surface and a second contact surface that are oppositely arranged. Along the second direction, the first contact surface conflicts with the first mounting seat, and the second contact surface conflicts with the second mounting seat.

[0023] In this way, the elastic pad is in surface contact with the first mounting seat and in surface contact with the second mounting seat, which is beneficial to improving the stability of the elastic pad arranged between the first mounting seat and the second mounting seat; in addition, the elastic modulus of the elastic pad can be calculated based on the driving force applied by the first driving mechanism to the second mounting seat and the area of ​​the first contact surface, so as to select a suitable elastic pad, which is beneficial to improving the service life of the elastic pad.

[0024] In one embodiment, the elastic pad and the first contact surface are symmetrically arranged with respect to a reference plane, the reference plane is perpendicular to the third direction, and the first direction, the second direction and the third direction intersect with each other.

[0025] In this way, the driving force applied by the first driving mechanism to the second mounting seat can be transmitted to the elastic pad and the second mounting seat more evenly, which is beneficial to improving the service life of the elastic pad and the second mounting seat.

[0026] In one embodiment, the elastic pad and the second contact surface are symmetrically arranged with respect to a reference plane, and the reference plane is perpendicular to the third direction; the first direction, the second direction and the third direction intersect with each other.

[0027] In this way, the driving force applied by the first driving mechanism to the second mounting seat can be transmitted to the elastic pad more evenly, which is beneficial to improving the service life of the elastic pad.

[0028] In one embodiment, at least one groove is formed on a side of the elastic pad close to the first mounting seat along the second direction, and the groove is recessed relative to the first contact surface along the second direction.

[0029] The area of ​​the first contact surface and the elastic modulus of the elastic pad can be selected according to the driving force applied by the first driving mechanism to the second mounting seat, so as to select a suitable elastic pad, thereby facilitating the improvement of the service life of the elastic pad.

[0030] In one embodiment, the coating device further includes a sensor, which is disposed on one of the first mounting seat and the second mounting seat and is used to obtain a deformation amount of the elastic pad along the second direction.

[0031] The sensor can be used to obtain the deformation of the elastic pad along the second direction, and then determine whether the deformation of the elastic pad exceeds the upper limit of the deformation of the elastic pad, thereby facilitating the determination of whether the elastic pad needs to be replaced.

[0032] In one embodiment, the coating device further includes an electrically connected controller and an alarm, the controller is electrically connected to the sensor, and the controller is used to control the alarm to send an alarm signal when the deformation of the elastic pad along the second direction obtained by the sensor is greater than a preset value.

[0033] When the deformation of the elastic pad along the second direction is greater than the preset value, it means that the deformation of the elastic pad is too large and it is very likely that it cannot meet the usage requirements. At this time, the alarm device sends an alarm signal to warn the operator to replace the elastic pad.

[0034] In one embodiment, the coating apparatus further includes a first carrier roller and a second carrier roller for carrying the current collector. The first carrier roller is disposed on a side of the working roller away from the support roller along the second direction and is configured to carry the initial active material layer. The second carrier roller is disposed on a side of the first carrier roller away from the working roller along the second direction. The first carrier roller and the working roller are configured to thin the initial active material layer located between the first carrier roller and the working roller. The first carrier roller and the second carrier roller are configured to transfer the initial active material layer to the current collector and to compress the initial active material layer into the active material layer.

[0035] In this way, the coating device can be used to first thin the initial active material layer, then coat the initial active material layer with the current collector, and can press the initial active material layer into an active material layer to obtain a pole piece.

[0036] In one embodiment, the coating device further includes an electrically connected controller and an acquisition mechanism, the acquisition mechanism being used to acquire the thickness of the active material layer. The controller is electrically connected to the first drive mechanism and is used to adjust the output of the first drive mechanism according to the thickness of the active material layer acquired by the acquisition mechanism.

[0037] In this way, the driving force applied by the first driving mechanism to the second mounting seat can be adjusted in real time according to the thickness of the active material layer obtained by the acquisition mechanism, and the deformation of the elastic pad can be adjusted accordingly, and the overall deflection of the working roller can also be adjusted, and the consistency of the film thickness after thinning the initial active material layer can be adjusted, which is beneficial to improving the thickness consistency of the active material layer.

[0038] In one embodiment, the active material layer includes a first portion and two second portions located on opposite sides of the first portion along a first direction, and the controller is configured to control the reduction of the driving force of the first driving mechanism when the thickness of the first portion is less than the thickness of the second portion.

[0039] When the thickness of the first part is smaller than that of the second part, it means that the active material layer is thin in the middle and thick on both sides, which means that it is very likely that the middle part of the working roller protrudes toward the side close to the initial active material layer, and further indicates that the driving force of the first driving mechanism is too large. It is necessary to reduce the driving force of the first driving mechanism in order to improve the consistency of the film thickness after thinning the initial active material layer and the thickness consistency of the active material layer.

[0040] In one embodiment, the active material layer includes a first portion and two second portions located on opposite sides of the first portion along a first direction, and the controller is configured to control the increase of the driving force of the first driving mechanism when the thickness of the first portion is greater than the thickness of the second portion.

[0041] When the thickness of the first part is greater than that of the second part, it means that the active material layer is thick in the middle and thin on both sides, which means that it is very likely that the middle part of the working roller protrudes toward the side away from the initial active material layer, and further indicates that the driving force of the first driving mechanism is too small. It is necessary to increase the driving force of the first driving mechanism to improve the consistency of the film thickness after thinning the initial active material layer and the thickness consistency of the active material layer.

[0042] In one embodiment, the minimum displacement of the second mounting seat driven by the first driving mechanism to move along the second direction is less than or equal to 10 microns.

[0043] In this way, the first driving mechanism drives the second mounting seat to move along the second direction with high precision, which is beneficial to improving the consistency of the film thickness after the initial active material layer is thinned and the thickness consistency of the active material layer.

[0044] According to a second aspect of the present application, a battery production line is provided, comprising the coating device of any one of the above embodiments.

[0045] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0047] Figure 1 A schematic structural diagram of a coating device in one embodiment of the present application is shown.

[0048] Figure 2 A top view of a coating device in one embodiment of the present application is shown.

[0049] Figure 3 A side view of a coating device in one embodiment of the present application is shown.

[0050] Figure 4 A schematic structural diagram of a first mounting seat, an elastic pad, a second mounting seat, a connecting member and a fastener in one embodiment of the present application is shown.

[0051] Figure 5 A schematic structural diagram of an elastic pad in an embodiment of the present application at a first viewing angle is shown.

[0052] Figure 6 A schematic structural diagram of the elastic pad in an embodiment of the present application at a second viewing angle is shown.

[0053] Figure 7 A schematic diagram of the process of disposing the elastic pad between the first mounting seat and the second mounting seat in one embodiment of the present application is shown.

[0054] Figure 8 A circuit block diagram of a sensor, a controller, an alarm, an acquisition mechanism, a first driving mechanism, etc. in an embodiment of the present application is shown.

[0055] Figure 9 A schematic diagram shows a process of measuring the thickness of an active material layer by a film thickness detector in one embodiment of the present application.

[0056] Figure markings: 10, coating equipment; 100, first roller assembly; 110, first mounting seat; 120, working roller; 200, second roller assembly; 210, second mounting seat; 220, supporting roller; 230, target part; 300, elastic pad; 310, first contact surface; 320, second contact surface; K, via hole; C, groove; 400, first driving mechanism; 510, connecting member; 520, fastener; 610, sensor; 620, controller; 630, alarm; 640, acquisition mechanism; 710, first supporting roller; 720, third mounting seat; 20, current collector; 30, active material layer; 31, first part; 32, second part; 40, film thickness detector; F1, first direction; F2, second direction; F3, third direction. DETAILED DESCRIPTION

[0057] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0058] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply 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 this application.

[0059] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0060] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0061] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0062] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0063] In the related art, the coating equipment includes a working roll and a support roll, and a non-elastic pad (such as a metal pad) is usually arranged between the bearing seat of the working roll and the bearing seat of the support roll. However, in the process of adjusting the working roll and the support roll, if the pad is relatively thick, it is necessary to adjust the pad by thinning processing, thereby reducing the situation where the working roll and the support roll cannot contact due to the pad being too thick, which leads to the problem of long debugging time in the coating equipment of the related art.

[0064] In order to solve the above technical problems, the present application designs a coating device and a battery production line. During the adjustment process of the coating device, multiple processing adjustments of the elastic pad can be omitted, thereby shortening the debugging time of the coating device.

[0065] The coating equipment and / or battery production line disclosed in the embodiments of the present application can be used in, but is not limited to, the production process of batteries.

[0066] Figure 1 1 shows a schematic structural diagram of a coating device 10 in an embodiment of the present application. Figure 2 FIG. 1 shows a top view of a coating device 10 in an embodiment of the present application. Figure 3 FIG. 1 shows a side view of a coating device 10 in an embodiment of the present application.

[0067] Please refer to Figure 1-Figure 3 An embodiment of the present application provides a coating device 10 , including a first roller assembly 100 , a second roller assembly 200 , an elastic pad 300 and a first driving mechanism 400 .

[0068] The first roll assembly 100 includes a first mounting seat 110 and a working roll 120 rotatably mounted on the first mounting seat 110 about an axis parallel to the first direction F1. The second roll assembly 200 includes a second mounting seat 210 and a support roll 220 rotatably mounted on the second mounting seat 210 about an axis parallel to the first direction F1. The first roll assembly 100 and the second roll assembly 200 are arranged along a second direction F2, and the first direction F1 and the second direction F2 intersect with each other.

[0069] The first roller assembly 100 refers to an assembly on the coating device 10 that includes a first mounting seat 110 and a working roller 120. The first roller assembly 100 may also include a first bearing (not shown in the figure). The working roller 120 can be mounted on the first mounting seat 110 through the first bearing. The first bearing can be used to reduce the friction force during the rotation of the working roller 120 around an axis parallel to the first direction F1, thereby improving the reliability of the rotation of the working roller 120 around an axis parallel to the first direction F1.

[0070] The first mounting seat 110 refers to a mounting seat on the first roll assembly 100 for mounting the working roll 120 , and the mounting seat may be a bearing seat.

[0071] The working roll 120 refers to a roll on the first roll assembly 100 for applying pressure to the slurry (the slurry may be an initial active material layer). The working roll 120 may be used to perform a thinning process on the slurry.

[0072] The second roller assembly 200 refers to an assembly on the coating device 10 that includes a second mounting seat 210 and a support roller 220. The second roller assembly 200 may also include a second bearing (not shown in the figure). The support roller 220 can be mounted on the second mounting seat 210 through the second bearing. The second bearing can be used to reduce the friction force during the rotation of the support roller 220 around an axis parallel to the first direction F1, thereby improving the reliability of the rotation of the support roller 220 around an axis parallel to the first direction F1.

[0073] The second mounting seat 210 refers to a mounting seat on the second roller assembly 200 for mounting the support roller 220 , and the mounting seat may be a bearing seat.

[0074] The support roller 220 refers to the roller on the second roller assembly 200 used to support the working roller 120. During the process of thinning the slurry by the working roller 120, the working roller 120 is easily subjected to the force and deflection deformation under the reaction force of the pressure. The support roller 220 can be used to support the working roller 120, reduce the probability of the working roller 120 undergoing deflection deformation or reduce the deformation rate of the working roller 120, which is beneficial to improve the thickness uniformity of the slurry, such as the initial active material layer, after thinning treatment.

[0075] The elastic pad 300 is disposed along the second direction F2 between the first mounting base 110 and the second mounting base 210. The first driving mechanism 400 is connected to the second mounting base 210 to drive the second mounting base 210 to move along the second direction F2.

[0076] The elastic pad 300 is an elastic pad disposed between the first mounting seat 110 and the second mounting seat 210 . The elastic pad 300 may be in a block or sheet shape.

[0077] The first driving mechanism 400 is a mechanism for driving the second mounting base 210 to move along the second direction F2. The first driving mechanism 400 may be a cylinder or a motor, and no specific limitation is given herein.

[0078] During the process of adjusting the coating equipment 10, for example, during the process of adjusting the spacing between the working roller 120 and the supporting roller 220 along the second direction F2, and before setting the elastic pad 300, the first driving mechanism 400 can be used to drive the second mounting seat 210 to move along the second direction F2 toward the side close to the first mounting seat 110, so that the working roller 120 and the supporting roller 220 are in light contact, and the spacing between the first mounting seat 110 and the second mounting seat 210 along the second direction F2 at this time is recorded as the first spacing, and then an elastic pad 300 with a thickness greater than the first spacing is selected, and the first driving mechanism 400 is used to drive the second mounting seat 210 to move along the second direction F2 toward the side away from the first mounting seat 110, and then the elastic pad 300 is set between the first mounting seat 110 and the second mounting seat 210 along the second direction F2, and then the first driving mechanism 400 is used to drive the second mounting seat 210 Move along the second direction F2 toward the side close to the first mounting seat 110, so that the working roller 120 and the support roller 220 are in light contact again, and the elastic pad 300 can also be compressed. In this way, the multiple thinning processing adjustments of the elastic pad 300 can be eliminated, and the adjustment operation of the working roller 120 and the support roller 220 can be completed, which is convenient for the subsequent use of the working roller 120 to thin the slurry such as the initial active material layer. In the process of adjusting the working roller 120 and the support roller 220, since the elastic pad 300 can be deformed, the situation where the working roller 120 and the support roller 220 cannot contact each other due to non-elastic pads can be reduced, and the process of multiple thinning treatments of non-elastic pads (such as metal pads) due to the inability to contact between the working roller 120 and the support roller 220 can be eliminated, thereby shortening the debugging time of the coating equipment 10 and improving the debugging efficiency of the coating equipment 10.

[0079] In some embodiments, the first direction F1 and the second direction F2 are perpendicular to each other.

[0080] It may be that the first direction F1 is parallel to the axial direction of the work roll 120 , and the second direction F2 is parallel to the radial direction of the work roll 120 .

[0081] In some embodiments, the first roll assembly 100 includes two first mounting seats 110 disposed at opposite ends of the working roll 120 along the first direction F1, and the second roll assembly 200 includes two second mounting seats 210 disposed at opposite ends of the support roll 220 along the first direction F1. The coating apparatus 10 includes at least two elastic pads 300 spaced apart along the first direction F1. Among the at least two elastic pads 300, one elastic pad 300 is disposed between the first mounting seat 110 and the second mounting seat 210 on one side along the first direction F1, and the other elastic pad 300 is disposed between the first mounting seat 110 and the second mounting seat 210 on the other side along the first direction F1.

[0082] In this way, on the one hand, the two first mounting seats 110 can be used to improve the levelness and stability of the working roll 120, and the two second mounting seats 210 can be used to improve the levelness and stability of the support roll 220. On the other hand, the elastic pads 300 can be used to ensure that the working roll 120 and the support roll 220 are in light contact, thereby shortening the commissioning time of the coating equipment 10 and improving the commissioning efficiency of the coating equipment 10. At least two elastic pads 300 can also be used to better support the support roll 220 on the working roll 120, and can also better reduce the probability of deflection deformation of the working roll 120 or better reduce the deformation rate of the working roll 120.

[0083] In some embodiments, the number of the elastic pads 300 is an even number, and the even number of elastic pads 300 are symmetrically distributed with the working roll 120 as a reference object.

[0084] The number of the elastic pads 300 may be two, four, or six. For example, the number of the elastic pads 300 is two.

[0085] Since an even number of elastic pads 300 are symmetrically distributed with the working roll 120 as a reference object, the support roll 220 can be used to better support the working roll 120 , and the balance and reliability of the working roll 120 can also be improved.

[0086] In some embodiments, the elastic pad 300 is detachably disposed between the first mounting seat 110 and the second mounting seat 210 .

[0087] The elastic pad 300 can be fixed by bolts or clamped between the first mounting seat 110 and the second mounting seat 210. Of course, the present application is not limited to this. The elastic pad 300 can also be detachably arranged between the first mounting seat 110 and the second mounting seat 210 in other ways.

[0088] In this way, it is convenient to disassemble, install or replace the elastic pad 300. For example, an elastic pad 300 with a suitable elastic modulus can be selected according to the driving force applied to the second mounting seat 210 by the first driving mechanism 400, so that the elastic pad 300 can better meet the application requirements of the corresponding scenario, which can broaden the application scope of the coating equipment 10 to a certain extent.

[0089] In some embodiments, please refer to Figure 4-Figure 6 The elastic pad 300 has a through hole K, and the coating device 10 also includes a connector 510 and a fastener 520. The connector 510 is set through the first mounting seat 110, the through hole K and the second mounting seat 210, and the fastener 520 is fastened to one end of the connector 510 that passes through the second mounting seat 210.

[0090] The through hole K refers to a hole on the elastic pad 300 for the connector 510 to pass through. The through hole K can be a round hole, a square hole, a strip-shaped hole, or the like.

[0091] The via hole K may be a hole that matches the cross-sectional shape of the connector 510 in the second direction F2; or the via hole K may have a hole wall that contacts a portion of the outer peripheral wall of the connector 510 and is spaced apart from another portion of the outer peripheral wall of the connector 510. For example, the connector 510 is a bolt, the via hole K is a square hole, the top and bottom walls of the via hole K contact the connector 510, and the sidewalls of the via hole K along the first direction F1 are spaced apart from the connector 510.

[0092] Alternatively, the first mounting base 110 may be provided with a hole for the connector 510 to pass through, so that the connector 510 can be installed through the first mounting base 110. The hole in the first mounting base 110 may be a hole that matches the cross-sectional shape of the connector 510 in the second direction F2, and the hole wall of the first mounting base 110 may also be spaced apart from the outer peripheral wall of the connector 510.

[0093] Alternatively, the second mounting base 210 may be provided with a hole for the connecting member 510 to pass through, so that the connecting member 510 can be installed through the second mounting base 210. It should be noted that the hole wall of the second mounting base 210 is spaced apart from the outer peripheral wall of the connecting member 510, so that the second mounting base 210 can move along the second direction F2 under the drive of the first driving mechanism 400.

[0094] The connecting member 510 refers to a component that passes through the first mounting seat 110, the through hole K, and the second mounting seat 210. The connecting member 510 can be a bolt or a pin.

[0095] The fastener 520 is a component used to position the connector 510 on the first mounting seat 110 and the second mounting seat 210 . The fastener 520 may be a nut matched with a bolt or a pin matched with a pin shaft.

[0096] In this way, the connector 510 can be positioned on the first mounting seat 110 and the second mounting seat 210 by the fastener 520, and the elastic pad 300 can be detachably arranged between the first mounting seat 110 and the second mounting seat 210 using the connector 510 and the fastener 520 to facilitate removal, installation or replacement of the elastic pad 300.

[0097] In some embodiments, there are at least two fasteners 520 , one fastener 520 is fastened to one end of the connector 510 passing through the second mounting seat 210 , and the other fastener 520 is fastened to one end of the connector 510 passing through the first mounting seat 110 .

[0098] In this way, the stability of the connection member 510 positioned on the first mounting seat 110 and the second mounting seat 210 can be improved, and the stability of the elastic pad 300 positioned between the first mounting seat 110 and the second mounting seat 210 can also be improved.

[0099] In some embodiments, the elastic pad 300 is inserted between the first mounting seat 110 and the second mounting seat 210 along the first direction F1 (which can be combined with Figure 1 and Figure 7 to understand).

[0100] The elastic pad 300 is installed between the first mounting seat 110 and the second mounting seat 210 in an insertion manner, which can improve the installation convenience of the elastic pad 300.

[0101] In some embodiments, the via hole K is longitudinally extended along the first direction F1 .

[0102] Since the through hole K is extended longitudinally along the first direction F1, the situation in which the connecting member 510 is difficult to pass through the first mounting seat 110, the elastic pad 300 and the second mounting seat 210 due to processing errors of the first mounting seat 110, the second mounting seat 210 and / or the elastic pad 300 can be reduced, thereby improving the installation adaptability of the elastic pad 300.

[0103] In some embodiments, a notch communicating with the via hole K is provided on one side wall of the via hole K in a direction opposite to the insertion direction of the elastic pad 300 . This facilitates the processing and manufacturing of the via hole K.

[0104] In some embodiments, the elastic pad 300 is provided with an even number of vias K spaced apart along the third direction F3. The first direction F1, the second direction F2, and the third direction F3 intersect with each other. The elastic pad 300 and the even number of vias K are symmetrically arranged with respect to a reference plane, which is perpendicular to the third direction F3.

[0105] In this way, the stability and reliability of the elastic pad 300 clamped between the first mounting seat 110 and the second mounting seat 210 can be improved by an even number of connectors 510 and a corresponding number of fasteners 520 (for example, the number of fasteners 520 is twice that of connectors 510).

[0106] In some embodiments, please refer to Figure 5 and Figure 6 Along the second direction F2, the elastic pad 300 has a first contact surface 310 and a second contact surface 320 that are oppositely arranged. Along the second direction F2, the first contact surface 310 conflicts with the first mounting seat 110, and the second contact surface 320 conflicts with the second mounting seat 210.

[0107] The first contact surface 310 refers to a surface on the elastic pad 300 that contacts the first mounting seat 110. The first contact surface 310 may be a plane, and the shape of the first contact surface 310 may be square or circular.

[0108] The second contact surface 320 refers to a surface on the elastic pad 300 that contacts the second mounting seat 210. The second contact surface 320 may be a plane, and the shape of the second contact surface 320 may be square or circular.

[0109] In this way, the elastic pad 300 is in surface-to-surface contact with the first mounting seat 110 and in surface-to-surface contact with the second mounting seat 210, which is beneficial to improving the stability of the elastic pad 300 arranged between the first mounting seat 110 and the second mounting seat 210; in addition, the elastic modulus of the elastic pad 300 can also be calculated based on the driving force applied by the first driving mechanism 400 to the second mounting seat 210 and the area of ​​the first contact surface 310, so as to select a suitable elastic pad 300, which is beneficial to improving the service life of the elastic pad 300.

[0110] In some embodiments, as Figure 5 and Figure 6 As shown, the elastic pad 300 and the first contact surface 310 are symmetrically arranged with respect to the reference plane. The reference plane is perpendicular to the third direction F3. The first direction F1, the second direction F2 and the third direction F3 intersect with each other.

[0111] In this way, the driving force applied by the first driving mechanism 400 to the second mounting seat 210 can be transmitted to the elastic pad 300 and the second mounting seat 210 more evenly, which is beneficial to improving the service life of the elastic pad 300 and the second mounting seat 210.

[0112] In some embodiments, as Figure 5 and Figure 6 As shown, the elastic pad 300 and the second contact surface 320 are symmetrically arranged with respect to the reference plane. The reference plane is perpendicular to the third direction F3. The first direction F1, the second direction F2 and the third direction F3 intersect with each other.

[0113] In this way, the driving force applied by the first driving mechanism 400 to the second mounting seat 210 can be transmitted to the elastic pad 300 more evenly, which is beneficial to improving the service life of the elastic pad 300.

[0114] In some embodiments, the first direction F1 , the second direction F2 , and the third direction F3 are perpendicular to each other.

[0115] The first direction F1 may be parallel to the axial direction of the working roll 120 , the second direction F2 may be parallel to the radial direction of the working roll 120 , and the third direction F3 may be parallel to the gravity direction of the coating apparatus 10 .

[0116] In some embodiments, as Figure 5 and Figure 6As shown, at least one groove C is defined on one side of the elastic pad 300 close to the first mounting seat 110 along the second direction F2 . The groove C is recessed relative to the first contact surface 310 along the second direction F2 .

[0117] The groove C is a groove provided on the side of the elastic pad 300 close to the first mounting seat 110 along the second direction F2. The number of the first grooves C and the notch area of ​​the first grooves C can be selected according to the required area of ​​the first contact surface 310.

[0118] For example, there are two grooves C. The two grooves C are symmetrically arranged relative to the first contact surface 310 .

[0119] The area of ​​the first contact surface 310 and the elastic modulus of the elastic pad 300 can be selected according to the driving force applied by the first driving mechanism 400 to the second mounting seat 210, so as to select a suitable elastic pad 300, thereby facilitating the improvement of the service life of the elastic pad 300.

[0120] In some embodiments, the coating apparatus 10 further includes a sensor 610 , which is disposed on one of the first mounting seat 110 and the second mounting seat 210 and is configured to obtain a deformation amount of the elastic pad 300 along the second direction F2 .

[0121] The sensor 610 is a component for obtaining the deformation amount of the elastic pad 300 along the second direction F2.

[0122] The sensor 610 may be disposed on the first mounting base 110 , or on the second mounting base 210 , as long as the deformation of the elastic pad 300 along the second direction F2 can be obtained.

[0123] The sensor 610 may be a displacement sensor, which can detect the displacement of the second mounting seat 210 driven by the first driving mechanism 400 along the second direction F2, thereby obtaining the deformation of the elastic pad 300 along the second direction F2.

[0124] For example, the sensor 610 is a contact displacement sensor, such as the Keyence GT series contact displacement sensor. The sensor 610 can be set on the first mounting seat 110. The sensor 610 includes a sensor body and a probe, and a spring connected between the sensor body and the probe. The probe of the sensor 610 contacts the target part 230 of the second mounting seat 210. When the first driving mechanism 400 drives the second mounting seat 210 to move along the second direction F2, the target part 230 will drive the spring. The sensor body is used to convert the mechanical force exerted on the probe into an electrical signal output, thereby obtaining the displacement of the second mounting seat 210 along the second direction F2.

[0125] Sensor 610 can be used to detect the deformation of elastic pad 300 along the second direction F2, thereby determining whether the deformation of elastic pad 300 exceeds the upper limit of deformation of elastic pad 300, thereby facilitating a determination of whether elastic pad 300 needs to be replaced. The deformation refers to the difference between the dimension of elastic pad 300 along the second direction F2 when not deformed and the dimension of elastic pad 300 along the second direction F2 when deformed.

[0126] The upper limit of deformation refers to the difference between the dimension of the elastic pad 300 along the second direction F2 when no deformation occurs and the dimension of the elastic pad 300 along the second direction F2 when the elastic pad 300 undergoes maximum deformation.

[0127] In some embodiments, as Figure 8 As shown, the coating device 10 also includes an electrically connected controller 620 and an alarm 630. The controller 620 is electrically connected to the sensor 610, and the controller 620 is used to control the alarm 630 to send an alarm signal when the sensor 610 obtains that the deformation of the elastic pad 300 along the second direction F2 is greater than a preset value.

[0128] The controller 620 refers to a device for controlling the alarm 630 to send out an alarm signal. The controller 620 may be a chip.

[0129] The alarm 630 is used to send out an alarm signal when the deformation of the elastic pad 300 along the second direction F2 is greater than a preset value. The alarm 630 may be an alarm light and / or an alarm speaker.

[0130] The preset value may be the above-mentioned upper limit of deformation.

[0131] When the deformation of the elastic pad 300 along the second direction F2 is greater than the preset value, it means that the deformation of the elastic pad 300 is too large and may not meet the usage requirements. At this time, the alarm 630 sends an alarm signal to warn the operator to replace the elastic pad 300.

[0132] In some embodiments, the coating apparatus 10 further includes a first carrier roller 710 and a second carrier roller (not shown) for carrying the current collector 20. The first carrier roller 710 is disposed on a side of the working roller 120 away from the support roller 220 along the second direction F2 and is used to carry the initial active material layer. The second carrier roller is disposed on a side of the first carrier roller 710 away from the working roller 120 along the second direction F2. The first carrier roller 710 and the working roller 120 are used to thin the initial active material layer located between the first carrier roller 710 and the working roller 120. The first carrier roller 710 and the second carrier roller are used to transfer the initial active material layer to the current collector 20 and to press the initial active material layer into the active material layer 30.

[0133] The coating device 10 may also include a third mounting seat 720 and a fourth mounting seat (not shown in the figure), the first supporting roller 710 is rotatably provided on the third mounting seat 720 around an axis parallel to the first direction F1, and the second supporting roller is rotatably provided on the fourth mounting seat around an axis parallel to the first direction F1.

[0134] The coating apparatus 10 may further include a third bearing and a fourth bearing. The first carrier roller 710 may be mounted on the third mounting seat 720 via the third bearing, such that the first carrier roller 710 is rotatably mounted on the third mounting seat 720 around an axis parallel to the first direction F1. The second carrier roller may be mounted on the fourth mounting seat via the fourth bearing, such that the second carrier roller is rotatably mounted on the fourth mounting seat around an axis parallel to the first direction F1.

[0135] The first carrying roller 710 is used to carry the initial active material layer so that the working roller 120 applies pressure to the initial active material layer between the first carrying roller 710 and the working roller 120 to thin the initial active material layer.

[0136] The first carrier roller 710 and the working roller 120 need to rotate synchronously in opposite directions. A second driving mechanism (not shown) can be used to drive the first carrier roller 710 and the working roller 120 to rotate synchronously in opposite directions. The second driving mechanism can be a rotary cylinder or a motor.

[0137] For example, the second driving mechanism is a servo motor. In this way, the second driving mechanism has a higher precision, which is beneficial to improving the thickness uniformity of the initial active material layer during thinning.

[0138] The second carrying roller is a roller used to carry the current collector 20 . The second carrying roller can cooperate with the first carrying roller 710 to transfer the initial active material layer to the current collector 20 and to press the initial active material layer into the active material layer 30 .

[0139] The second carrying roller and the first carrying roller 710 also rotate synchronously in opposite directions. The first carrying roller 710 and the second carrying roller can be driven by a second driving mechanism to rotate synchronously in opposite directions. For example, the driving gear is coaxially arranged with the working roller 120, the first driven gear is coaxially arranged with the first carrying roller 710, and the second driven gear is coaxially arranged with the second carrying roller. The driving gear is driven to rotate by the second driving mechanism, thereby driving the first carrying roller 710 and the second carrying roller to rotate synchronously in opposite directions, and driving the first carrying roller 710 and the working roller 120 to rotate synchronously in opposite directions.

[0140] In this way, the coating device 10 can be used to first thin the initial active material layer, then coat the initial active material layer with the current collector 20 , and can press the initial active material layer into the active material layer 30 to obtain a pole piece.

[0141] In some embodiments, as Figure 8 As shown, the coating apparatus 10 further includes an electrically connected controller 620 and an acquisition mechanism 640, wherein the acquisition mechanism 640 is configured to acquire the thickness of the active material layer 30. The controller 620 is electrically connected to the first drive mechanism 400 and is configured to adjust the output of the first drive mechanism 400 based on the thickness of the active material layer 30 acquired by the acquisition mechanism 640.

[0142] The acquisition mechanism 640 is a mechanism for acquiring the thickness of the active material layer 30. The acquisition mechanism 640 can be electrically connected to the downstream film thickness detector 40 to acquire the thickness of the active material layer 30 detected by the film thickness detector 40 ( Figure 9 Schematic diagram showing the process of the film thickness detector 40 detecting the active material layer 30). The acquisition mechanism 640 may be a memory.

[0143] In this way, the driving force applied by the first driving mechanism 400 to the second mounting seat 210 can be adjusted in real time according to the thickness of the active material layer 30 obtained by the acquisition mechanism 640, and the deformation of the elastic pad 300 can be adjusted accordingly, and the overall deflection of the working roller 120 can also be adjusted, and the consistency of the film thickness after thinning the initial active material layer can be adjusted, which is beneficial to improving the thickness consistency of the active material layer 30.

[0144] In some embodiments, as Figure 9 As shown, the active material layer 30 includes a first portion 31 and two second portions 32 located on opposite sides of the first portion 31 along the first direction F1. The controller 620 may be configured to control the reduction of the driving force of the first driving mechanism 400 when the thickness of the first portion 31 is less than the thickness of the second portion 32. Alternatively, the controller 620 may be configured to control the increase of the driving force of the first driving mechanism 400 when the thickness of the first portion 31 is greater than the thickness of the second portion 32. Alternatively, the controller 620 may be configured to control the reduction of the driving force of the first driving mechanism 400 when the thickness of the first portion 31 is less than the thickness of the second portion 32. The controller 620 may also be configured to control the increase of the driving force of the first driving mechanism 400 when the thickness of the first portion 31 is greater than the thickness of the second portion 32.

[0145] When the thickness of the first portion 31 is less than the thickness of the second portion 32, it means that the active material layer 30 is thin in the middle and thick on both sides, which means that it is very likely that the middle part of the working roller 120 protrudes toward the side close to the initial active material layer, and further indicates that the driving force of the first driving mechanism 400 is too large. In this case, it is necessary to reduce the driving force of the first driving mechanism 400 in order to improve the consistency of the film thickness after thinning the initial active material layer and the thickness consistency of the active material layer 30.

[0146] When the thickness of the first portion 31 is greater than that of the second portion 32, it means that the active material layer 30 is thick in the middle and thin on both sides, which means that it is very likely that the middle portion of the working roller 120 protrudes toward the side away from the initial active material layer, and further indicates that the driving force of the first driving mechanism 400 is too small. In this case, it is necessary to increase the driving force of the first driving mechanism 400 to improve the film thickness consistency after thinning the initial active material layer and the thickness consistency of the active material layer 30.

[0147] In some embodiments, the minimum displacement of the second mounting base 210 driven by the first driving mechanism 400 to move along the second direction F2 is less than or equal to 10 micrometers.

[0148] The smaller the minimum displacement of the second mounting seat 210 driven by the first driving mechanism 400 to move along the second direction F2 , the better.

[0149] The first driving mechanism 400 may drive the second mounting base 210 to move in the second direction F2 by a minimum displacement greater than or equal to 1 micron. For example, the first driving mechanism 400 may drive the second mounting base 210 to move in the second direction F2 by a minimum displacement equal to 1 micron, 2 microns, 5 microns, or 10 microns.

[0150] For example, the first driving mechanism 400 is a high-precision, low-friction gas-liquid booster cylinder, such as a Centor booster cylinder.

[0151] In this way, the accuracy of the first driving mechanism 400 in driving the second mounting seat 210 to move along the second direction F2 can be improved, thereby facilitating improvement of the thickness consistency of the thinned initial active material layer and the thickness consistency of the active material layer 30 .

[0152] In some embodiments, two elastic pads 300 are provided, wherein one elastic pad 300 is provided between the first mounting seat 110 and the second mounting seat 210 on one side along the first direction F1, and the other elastic pad 300 is provided between the first mounting seat 110 and the second mounting seat 210 on the other side along the first direction F1.

[0153] The elastic pad 300 can be used to make the working roller 120 and the support roller 220 touch each other lightly, thereby shortening the commissioning time of the coating equipment 10 and improving the commissioning efficiency of the coating equipment 10. The two elastic pads 300 can also be used to better support the support roller 220 on the working roller 120, and can also better reduce the probability of deflection deformation of the working roller 120 or better reduce the deformation rate of the working roller 120.

[0154] The present application also provides a battery production line, comprising the coating device 10 according to any one of the above embodiments.

[0155] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0156] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A coating device, characterized in that, The coating equipment includes: A first roller assembly (100) comprises a first mounting seat (110) and a working roller (120) rotatably arranged on the first mounting seat (110) around an axis parallel to a first direction (F1); A second roller assembly (200) comprises a second mounting seat (210) and a support roller (220) rotatably arranged on the second mounting seat (210) around an axis parallel to the first direction (F1); the first roller assembly (100) and the second roller assembly (200) are arranged along a second direction (F2); the first direction (F1) and the second direction (F2) intersect each other; an elastic pad (300) disposed between the first mounting seat (110) and the second mounting seat (210) along the second direction (F2); and A first driving mechanism (400) is connected to the second mounting seat (210) and is used to drive the second mounting seat (210) to move along the second direction (F2).

2. The coating device according to claim 1, characterized in that The first roller assembly (100) comprises two first mounting seats (110) arranged at opposite ends of the working roller (120) along the first direction; The second roller assembly (200) comprises two second mounting seats (210) arranged at opposite ends of the support roller (220) along the first direction; The coating device comprises at least two elastic pads (300) arranged at intervals along the first direction (F1); Among the at least two elastic pads (300), one of the elastic pads (300) is arranged between the first mounting seat (110) and the second mounting seat (210) on one side along the first direction (F1), and the other elastic pad (300) is arranged between the first mounting seat (110) and the second mounting seat (210) on the other side along the first direction (F1).

3. The coating device according to claim 2, characterized in that The number of the elastic pads (300) is an even number; An even number of the elastic pads (300) are symmetrically distributed with the working roller (120) as a reference object.

4. The coating device according to any one of claims 1 to 3, characterized in that: The elastic pad (300) is detachably arranged between the first mounting seat (110) and the second mounting seat (210).

5. The coating device according to claim 4, characterized in that The elastic pad (300) has a through hole (K); The coating device further comprises a connecting member (510) and a fastener (520), wherein the connecting member (510) is arranged through the first mounting seat (110), the through hole (K) and the second mounting seat (210), and the fastener (520) is fastened to one end of the connecting member (510) passing through the second mounting seat (210).

6. The coating device according to claim 5, characterized in that At least two fasteners (520) are provided, one fastener (520) is fastened to one end of the connecting member (510) passing through the second mounting seat (210), and the other fastener (520) is fastened to one end of the connecting member (510) passing through the first mounting seat (110).

7. The coating device according to claim 5, characterized in that The elastic pad (300) is inserted between the first mounting seat (110) and the second mounting seat (210) along the first direction (F1); and / or Along the first direction (F1), the via hole (K) is longitudinally extended.

8. The coating device according to claim 5, characterized in that The elastic pad (300) is provided with an even number of via holes (K) spaced apart along the third direction (F3); The first direction (F1), the second direction (F2) and the third direction (F3) intersect each other; The elastic pad (300) and an even number of the via holes (K) are symmetrically arranged with a reference plane as a reference object, and the reference plane is perpendicular to the third direction (F3).

9. The coating device according to any one of claims 1 to 3, characterized in that: Along the second direction (F2), the elastic pad (300) has a first contact surface (310) and a second contact surface (320) that are arranged opposite to each other; Along the second direction (F2), the first contact surface (310) conflicts with the first mounting seat (110), and the second contact surface (320) conflicts with the second mounting seat (210).

10. The coating device according to claim 9, characterized in that The elastic pad (300) and the first contact surface (310) are both symmetrically arranged with a reference plane as a reference object, and the reference plane is perpendicular to the third direction (F3); and / or The elastic pad (300) and the second contact surface (320) are both symmetrically arranged with a reference plane as a reference object, and the reference plane is perpendicular to the third direction (F3); The first direction (F1), the second direction (F2) and the third direction (F3) intersect with each other.

11. The coating device according to claim 9, characterized in that The elastic pad (300) is provided with at least one groove (C) on one side thereof close to the first mounting seat (110) along the second direction (F2); Along the second direction (F2), the groove (C) is recessed relative to the first contact surface (310).

12. The coating device according to any one of claims 1 to 3, characterized in that: The coating device further includes a sensor (610); The sensor (610) is provided on one of the first mounting seat (110) and the second mounting seat (210), and is used to obtain the deformation amount of the elastic pad (300) along the second direction (F2).

13. The coating device according to claim 12, characterized in that The coating device further includes an electrically connected controller (620) and an alarm (630); The controller (620) is electrically connected to the sensor (610), and the controller (620) is used to control the alarm (630) to emit an alarm signal when the deformation of the elastic pad (300) along the second direction (F2) obtained by the sensor (610) is greater than a preset value.

14. The coating device according to any one of claims 1 to 3, characterized in that: The coating equipment also includes: a first carrying roller (710), arranged along the second direction (F2) on a side of the working roller (120) away from the support roller (220), and used for carrying the initial active material layer; a second carrying roller for carrying the current collector (20), the second carrying roller being arranged on a side of the first carrying roller (710) away from the working roller (120) along the second direction (F2); The first bearing roller (710) and the working roller (120) are used to thin the initial active material layer between the first bearing roller (710) and the working roller (120); The first carrying roller (710) and the second carrying roller are used to transfer the initial active material layer onto the current collector (20), and to press the initial active material layer into an active material layer (30).

15. The coating device according to claim 14, characterized in that The coating device further includes an electrically connected controller (620) and an acquisition mechanism (640); The acquisition mechanism (640) is used to acquire the thickness of the active material layer (30); The controller (620) is electrically connected to the first driving mechanism (400) and is used to adjust the output of the first driving mechanism (400) according to the thickness of the active material layer (30) acquired by the acquisition mechanism (640).

16. The coating device according to claim 15, characterized in that The active material layer (30) comprises a first portion (31) and two second portions (32) located on opposite sides of the first portion (31) along the first direction F1; The controller (620) is used for controlling the reduction of the driving force of the first driving mechanism (400) when the thickness of the first portion (31) is smaller than the thickness of the second portion (32); and / or The controller (620) is used for controlling and increasing the driving force of the first driving mechanism (400) when the thickness of the first part (31) is greater than the thickness of the second part (32).

17. The coating device according to any one of claims 1 to 3, characterized in that: The minimum displacement of the second mounting seat (210) driven by the first driving mechanism (400) to move along the second direction (F2) is less than or equal to 10 micrometers.

18. A battery production line, characterized in that: Comprising the coating device according to any one of claims 1 to 17.

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