Thickness measuring device and flaking equipment

Abstract

The utility model relates to a thickness measuring device and flaking equipment. The thickness measuring device comprises a base; the detection mechanism comprises a moving seat and a thickness measuring assembly, the moving seat is movably connected to the base in the first direction, and the thickness measuring assembly is arranged on the moving seat and used for detecting the thickness of the passing material belt in the process of moving along with the moving seat in the first direction; the driving mechanism comprises a driving assembly, a connecting block, a first check block and a second check block, and the connecting block is connected to the driving end of the driving assembly so that the driving assembly can drive the connecting base to move in the first direction; the first check block and the second check block are arranged on the moving seat in a spaced mode in the first direction, the connecting block is limited between the first check block and the second check block, and a gap is formed between the connecting block and the moving seat.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery manufacturing equipment, in particular to a thickness measuring device and a sheet manufacturing device. BACKGROUND

[0002] The pole piece is an important component of the battery cell and is divided into a positive pole piece and a negative pole piece. The pole piece is generally prepared by a coating process, and the main preparation process is coating, drying, rolling and slitting. The thickness of the pole piece is an important parameter for checking whether the pole piece is qualified, and therefore, the thickness of the pole piece needs to be monitored in real time by using a thickness measuring device.

[0003] The thickness measuring device is arranged downstream of the rolling device and is used for detecting the thickness of the pole piece after rolling, and the parameters of the rolling device are adjusted according to the detection result of the thickness measuring device until the thickness of the pole piece is qualified. The thickness measuring device needs to be moved to scan the pole piece along the width direction of the pole piece. However, the thickness measuring device will vibrate during movement, which will adversely affect the thickness measuring precision and stability of the thickness measuring device. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a thickness measuring device and a sheet manufacturing device which can weaken the vibration of the thickness measuring device during movement, thereby improving the thickness measuring precision and stability.

[0005] A thickness measuring device comprises:

[0006] a base;

[0007] a detection mechanism comprising a moving seat and a thickness measuring assembly, the moving seat being movably connected to the base along a first direction, and the thickness measuring assembly being arranged on the moving seat and being used for detecting the thickness of a passing material belt during movement of the moving seat along the first direction;

[0008] a driving mechanism comprising a driving assembly, a connecting block, a first stop block and a second stop block, the connecting block being connected to a driving end of the driving assembly so that the driving assembly can drive the connecting seat to move along the first direction, and the first stop block and the second stop block being arranged on the moving seat along the first direction, the connecting block being limited between the first stop block and the second stop block and having a gap with the moving seat.

[0009] In some embodiments, the connecting block is fitted between the first stop block and the second stop block.

[0010] In some embodiments, the driving mechanism further comprises a third stopper and a fourth stopper disposed on the moving seat, the third stopper and the fourth stopper are spaced apart along a second direction, and the connecting block is limited between the third stopper and the fourth stopper, the second direction is arranged at an angle with the first direction.

[0011] In some embodiments, the connecting block is clearance-fitted between the third stopper and the fourth stopper.

[0012] In some embodiments, the connecting block is located on one side of the moving seat in a third direction, the third direction is arranged at an angle with the first direction and the second direction.

[0013] The first stopper, the second stopper, the third stopper and the fourth stopper are all located on the side of the moving seat facing the connecting block, one end of the connecting block is connected with the driving end of the driving assembly, the other end of the connecting block is located in the limiting space formed by the first stopper, the second stopper, the third stopper and the fourth stopper, and there is a clearance between the moving seat in the third direction.

[0014] In some embodiments, the driving assembly comprises a lead screw, a rotary driving member and a lead screw nut sleeve, the lead screw is rotatably connected to the base, and the axial direction of the lead screw is parallel to the first direction, the rotary driving member is installed on the base and drivingly connected with the lead screw, and the lead screw nut sleeve is threadedly connected to the lead screw and fixedly connected with the connecting block.

[0015] In some embodiments, the base is provided with at least two slide rails longitudinally extending along the first direction, the moving seat is provided with a plurality of sliding blocks, each of the sliding blocks is slidingly fitted on the corresponding slide rail, and part of the slide rails are located on one side of the lead screw, and the other part of the slide rails are located on the other side of the lead screw.

[0016] In some embodiments, the thickness measuring assembly comprises a first detector and a second detector installed on the moving seat, a detection channel for the material belt to pass through is formed between the first detector and the second detector, the first detector is used to detect the distance between the first detector and the side surface of the material belt facing the first detector, and the second detector is used to detect the distance between the second detector and the side surface of the material belt facing the second detector.

[0017] In some embodiments, the moving seat has a clearance groove communicating with the detection channel, the clearance groove longitudinally extends along the first direction, and is used to avoid the material belt passing through the detection channel.

[0018] A sheet manufacturing device comprises a coating device, a rolling device, the thickness measuring device as described in any one of the above embodiments, and a slitting device.

[0019] The coating device is used to coat the active material layer on the current collector tape to form a pole piece tape; the rolling device is arranged downstream of the coating device and is used to roll the pole piece tape passing through; the thickness measuring device is arranged downstream of the rolling device and is used to measure the thickness of the pole piece tape passing through; and the slitting device is arranged downstream of the thickness measuring device and is used to slit the pole piece tape passing through.

[0020] In actual use, the pole piece tape to be measured in thickness passes through the thickness measuring assembly, and the width direction of the pole piece tape passing through the thickness measuring assembly is parallel to the first direction. The driving assembly drives the connecting block to move along the first direction, the connecting block drives the moving seat to move along the first direction relative to the base through the first stop block or the second stop block, and the moving seat drives the thickness measuring assembly thereon to move along the first direction, so that the thickness measuring assembly scans along the width direction of the pole piece tape to detect the thickness of the pole piece tape at each position in the width direction. Since the connecting block and the moving seat have a gap and are not fixedly connected to the moving seat, the vibration generated by the driving assembly during driving will not be transmitted to the moving seat, thereby avoiding the adverse effects on the detection accuracy and stability of the thickness measuring assembly, i.e., being conducive to improving the thickness measuring accuracy and stability of the thickness measuring assembly. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic view of a thickness measuring device according to an embodiment of the present application;

[0022] Figure 2 FIG. 2 is a side view of the thickness measuring device shown in FIG. 1; Figure 1

[0023] Figure 3 FIG. 3 is a structural schematic view of the thickness measuring device shown in FIG. 1 (part of components are omitted); Figure 1

[0024] Figure 4 FIG. 4 is a sectional structural schematic view of the thickness measuring device shown in FIG. 1 along the direction of A-A; Figure 3

[0025] Figure 5 FIG. 5 is a bottom view of the moving seat of the thickness measuring device shown in FIG. 1; Figure 4

[0026] Figure 6 FIG. 6 is a structural schematic view of the moving seat shown in FIG. 5 from another perspective; Figure 5

[0027] Figure 7 FIG. 7 is a structural schematic view of a sheet manufacturing device according to an embodiment of the present application;​​​​​Figure 1 a partial enlarged view of the thickness measuring assembly of the thickness measuring device shown;

[0028] Figure 8 Fig. 1 is a schematic view of a tablet making apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely used for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0031] In addition, the terms "first", "second", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implying the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly contacting the first and second features, or indirectly contacting the first and second features through an intervening medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0034] It is noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can also be present. In the description of the present application, the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are used for the purpose of illustration only and do not actually indicate the only orientation of the application.

[0035] Referring to Figures 1 to 4 The present application provides a thickness measuring device 200 for measuring the thickness of a passing material strip. The material strip can be a pole piece material strip (positive pole piece material strip or negative pole piece material strip), but in other embodiments it can also be other types of material strips, which are not particularly limited herein. For the sake of convenience, the following description will be made by taking the material strip as a pole piece material strip.

[0036] The thickness measuring device 200 comprises a base 10, a detection mechanism 20 and a driving mechanism 30. The detection mechanism 20 comprises a moving seat 21 and a thickness measuring assembly (not marked in the figure), and the moving seat 21 is movably connected to the base 10 along a first direction X1. The thickness measuring assembly is arranged on the moving seat 21, so that the thickness measuring assembly can move reciprocally along the first direction X1 together with the moving seat 21. The thickness measuring assembly detects the thickness of the passing pole piece material belt 100 during the movement along the first direction X1 of the moving seat 21. The driving mechanism 30 comprises a driving assembly 36a, a connecting block 33, a first stop block 34 and a second stop block 35. The driving end of the driving assembly 36a is fixedly connected to the connecting block 33, so that the driving assembly 36a can drive the connecting block 33 to move along the first direction X1. The first stop block 34 and the second stop block 35 are arranged on the moving seat 21 along the first direction X1. The connecting block 33 is located between the first stop block 34 and the second stop block 35 and has a gap with the moving seat 21. Since the connecting block 33 is limited between the first stop block 34 and the second stop block 35 arranged along the first direction X1, when the driving assembly 36a drives the connecting block 33 to move along the first direction X1, the moving seat 21 can be driven to move relative to the base 10 along the first direction X1 by the first stop block 34 or the second stop block 35, so that the thickness measuring assembly moves along the first direction X1 together with the moving seat 21.

[0037] In actual use, the pole piece material belt 100 to be measured passes the thickness measuring assembly, and the width direction of the pole piece material belt 100 passing the thickness measuring assembly is parallel to the first direction X1. The driving assembly 36a is controlled to drive the connecting block 33 to move along the first direction X1, the connecting block 33 drives the moving seat 21 to move relative to the base 10 along the first direction X1 through the first stop block 34 or the second stop block 35, and the moving seat 21 drives the thickness measuring assembly thereon to move along the first direction X1, so that the thickness measuring assembly scans along the width direction of the pole piece material belt 100 to detect the thickness of the pole piece material belt 100 at each position in the width direction. Since the connecting block 33 has a gap with the moving seat 21 and is not fixedly connected to the moving seat 21, the vibration generated by the driving assembly 36a during driving will not be transmitted to the moving seat 21, so that the detection accuracy and stability of the thickness measuring assembly are not adversely affected, that is, the thickness measuring accuracy and stability of the thickness measuring assembly are improved.

[0038] In specific embodiments, the connecting block 33 is gap-fitted between the first stop block 34 and the second stop block 35, so that the connecting block 33 has a certain vibration space between the first stop block 34 and the second stop block 35 to realize vibration isolation, that is, to avoid the vibration transmitted from the driving assembly 36a to the connecting block 33 to continue to be transmitted to the moving seat 21.

[0039] It can be understood that the clearance fit of the connecting block 33 between the first stop block 34 and the second stop block 35 means that the distance between the first stop block 34 and the second stop block 35 is slightly greater than the size of the connecting block 33 in the first direction X1, so that the connecting block 33 can freely vibrate between the first stop block 34 and the second stop block 35, avoiding the first stop block 34 and the second stop block 35 clamping and fixing the connecting block 33, and further avoiding the vibration transmitted to the connecting block 33 from being transmitted to the moving seat 21.

[0040] Please see Figure 5 and Figure 6 In specific embodiments, the driving mechanism 30 further includes a third stop block 36 and a fourth stop block 37 arranged on the moving seat 21. The third stop block 36 and the fourth stop block 37 are arranged at intervals along the second direction X2, and the connecting block 33 is limited between the third stop block 36 and the fourth stop block 37. The second direction X2 is arranged at an angle with the above-mentioned first direction X1. That is, the first stop block 34 and the second stop block 35 arranged at intervals along the first direction X1 and the third stop block 36 and the fourth stop block 37 arranged at intervals along the second direction X2 together enclose a limiting space, and a part of the connecting block 33 is limited in the limiting space.

[0041] Further, the connecting block 33 is clearance fitted between the third stop block 36 and the fourth stop block 37, so that the connecting block 33 has a certain vibration space between the third stop block 36 and the fourth stop block 37 to realize vibration isolation, that is, to avoid the vibration transmitted to the connecting block 33 from being transmitted to the moving seat 21.

[0042] It can be understood that the clearance fit of the connecting block 33 between the third stop block 36 and the fourth stop block 37 means that the distance between the third stop block 36 and the fourth stop block 37 is slightly greater than the size of the connecting block 33 in the second direction X2, so that the connecting block 33 can freely vibrate between the third stop block 36 and the fourth stop block 37, avoiding the third stop block 36 and the fourth stop block 37 clamping and fixing the connecting block 33, and further avoiding the vibration transmitted to the connecting block 33 from being transmitted to the moving seat 21.

[0043] Specifically, the connecting block 33 is located on one side of the moving seat 21 in a third direction X3, which is arranged at an angle with the first direction X1 and the second direction X2. The first stop block 34, the second stop block 35, the third stop block 36 and the fourth stop block 37 are all located on the side of the moving seat 21 facing the connecting block 33. One end of the connecting block 33 is fixedly connected with the driving end of the driving assembly 36a. The other end of the connecting block 33 is located in the limiting space enclosed by the first stop block 34, the second stop block 35, the third stop block 36 and the fourth stop block 37, and there is a gap between the connecting block 33 and the moving seat 21 in the third direction X3. In this way, when the vibration generated by the driving assembly 36a is transmitted to the connecting block 33, the connecting block 33 vibrates in the above-mentioned limiting space. Since there is a gap between the connecting block 33 and the moving seat 21 in the third direction X3, the vibration of the connecting block 33 will not be transmitted to the moving seat 21 (especially in the third direction X3), and the shock isolation effect is obvious, which is beneficial to improve the thickness measurement precision and stability of the thickness measurement assembly.

[0044] Optionally, the first direction X1, the second direction X2 and the third direction X3 are perpendicular to each other. Figure 1 and 3 In the embodiments shown in

[0045] Please continue to refer to Figure 1 , Figure 2 and Figure 7As shown, in the embodiment of the present application, the thickness measuring assembly comprises a first detector 23 and a second detector 25 mounted on the moving seat 21. The first detector 23 and the second detector 25 are oppositely arranged in the third direction X3 and form a detection channel B through which the pole piece strip 100 passes. The distance between the first detector 23 and the second detector 25 is C. The side surface of the pole piece strip 100 passing through the detection channel B towards the first detector 23 is the first side surface, and the side surface of the pole piece strip 100 passing through the detection channel B towards the second detector 25 is the second side surface. The first detector 23 is used to detect the distance A between itself and the first side surface of the pole piece strip 100 passing through the detection channel B, and the second detector 25 is used to detect the distance B between itself and the second side surface of the pole piece strip 100 passing through the detection channel B, so as to obtain the thickness L = C - A - B of the pole piece strip 100. In this way, since the distance C between the first detector 23 and the second detector 25 remains stable and does not change, it has a direct impact on the accuracy of the measured thickness value L of the pole piece strip 100, so in the present application, the connecting block 33 and the moving seat 21 are not locked and fixed, but the power transmission is achieved by the clearance fit between the first stop block 34 and the second stop block 35 and the connecting block 33, so as to avoid the vibration generated by the driving assembly 36a from being transmitted to the moving seat 21, ensure that the distance C between the first detector 23 and the second detector 25 remains stable, and thus make the measured thickness value L of the pole piece strip 100 more accurate.

[0046] It should be noted that the first detector 23 can adopt a laser distance sensor, and of course the first detector 23 can also adopt other distance sensors, as long as it can measure the distance between itself and the first side surface of the pole piece strip 100, which is not specially limited here. Similarly, the second detector 25 can also adopt a laser distance sensor, and of course the second detector 25 can also adopt other distance sensors, as long as it can measure the distance between itself and the second side surface of the pole piece strip 100, which is not specially limited here.

[0047] Further, the moving seat 21 has an avoidance groove 212 communicating with the detection channel B, which extends longitudinally along the first direction X1 and is used for avoiding the pole piece strip 100 passing through the detection channel B. In this way, during the movement of the moving seat 21 along the first direction X1 driving the first detector 23 and the second detector 25, the avoidance groove 212 on the moving seat 21 can be used for the pole piece strip 100 to enter and exit, so as to avoid the interference between the pole piece strip 100 and the moving seat 21. Specifically to Figure 7In the shown embodiment, when the moving seat 21 moves right, the pole piece material strip 100 passing through the detection channel B enters the emptying groove 212 of the moving seat 21, and when the moving seat 21 moves left, the pole piece material strip 100 passing through the detection channel B exits the emptying groove 212 of the moving seat 21, so that the moving seat 21 and the pole piece material strip 100 do not interfere with each other.

[0048] It should be noted that the length of the emptying groove 212 can be determined according to the width of the pole piece material strip 100 and the stroke of the moving seat 21 moving along the first direction X1, as long as the moving seat 21 and the pole piece material strip 100 do not interfere with each other, which is not limited herein.

[0049] Please refer again to Figures 1 to 4 In the embodiment of the present application, the driving assembly 36a includes a lead screw 31, a rotary driving member (not shown) and a lead screw nut sleeve 32. The lead screw 31 is rotatably connected to the above-mentioned base 10 about its own axis, and the axial direction of the lead screw 31 is parallel to the above-mentioned first direction X1. The rotary driving member is installed on the base 10 and drivingly connected to the lead screw 31, so that the rotary driving member can drive the lead screw 31 to rotate about its own axis. The lead screw nut sleeve 32 is threadedly connected to the lead screw 31 and fixedly connected to the connecting block 33, so that when the rotary driving member drives the lead screw 31 to rotate, the lead screw nut sleeve 32 can be driven to move along the axial direction of the lead screw 31 (i.e. along the first direction X1), and the lead screw nut sleeve 32 in turn drives the connecting block 33 to move along the first direction X1, and the connecting block 33 in turn drives the moving seat 21, the first detector 23 and the second detector 25 on the moving seat 21 to move along the first direction X1. Optionally, the rotary driving member can be an electric motor.

[0050] It should be noted that during the process of driving the lead screw 31 to rotate by the rotary driving member and driving the lead screw nut sleeve 32 on the lead screw 31 to move along the first direction X1 by the lead screw 31, vibration will be generated and transmitted to the connecting block 33. In the present application, since the connecting block 33 is limited in the limiting space formed by the first stop block 34, the second stop block 35, the third stop block 36 and the fourth stop block 37, and there is a gap between the connecting block 33 and the moving seat 21, the connecting block 33 has a certain vibration space between the first stop block 34, the second stop block 35, the third stop block 36 and the fourth stop block 37, so that the vibration is not transmitted to the moving seat 21 (especially the vibration along the third direction X3), thereby ensuring that the distance C between the first detector 23 and the second detector 25 remains stable and unchanged, which is beneficial to improve the thickness measurement precision and stability of the thickness measurement assembly.

[0051] It should be further noted that, due to the good vibration isolation effect between the connecting block 33 and the moving seat 21, the vibration cannot be transmitted to the moving seat 21 by the connecting block 33 to affect the thickness measurement accuracy and stability of the thickness measurement assembly, thereby reducing the adverse effects of the vibration generated by the rotation of the rotating driving member, the lead screw 31 and the lead screw nut sleeve 32 on the thickness measurement accuracy and stability, and thus reducing the manufacturing, installation and adjustment accuracy requirements of the lead screw 31 and the lead screw nut sleeve 32 and the like, and further greatly reducing the equipment manufacturing and maintenance costs under the premise of ensuring the thickness measurement accuracy and stability.

[0052] In specific embodiments, the base 10 is provided with a slide rail 11 extending longitudinally along the first direction X1. The moving seat 21 is provided with a sliding block 12 slidingly fitted on the slide rail 11, so that the movement of the sliding block 12 along the slide rail 11 guides the movement of the moving seat 21 relative to the base 10 along the first direction X1.

[0053] Further, the base 10 is provided with at least two slide rails 11 extending longitudinally along the first direction X1. The moving seat 21 is provided with a plurality of sliding blocks 12, each sliding block 12 being slidingly fitted on a corresponding slide rail 11, so that the moving seat 21 is supported on each slide rail 11 by each sliding block 12. Part of the slide rails 11 are located on one side of the lead screw 31, and the other part of the slide rails 11 are located on the other side of the lead screw 31. In this way, each slide rail 11 for supporting the moving seat 21 is arranged on the opposite sides of the lead screw 31, so that the support of the moving seat 21 is more stable and reliable, avoiding the shaking of the moving seat 21 during movement, and further improving the thickness measurement accuracy and stability of the thickness measurement assembly.

[0054] Please refer to Figure 8 As shown, based on the above-mentioned thickness measurement device 200, the application further provides a sheet manufacturing equipment, which comprises a coating device (not shown in the figure), a rolling device 300, the thickness measurement device 200 as described in any of the above embodiments, and a slitting device 400. The coating device is used to coat the current collector tape to form an active material layer, so that the current collector and the active material layer thereon form a pole piece tape 100. The rolling device 300 is arranged downstream of the coating device and is used to roll the passing pole piece tape 100 to achieve the thinning of the pole piece tape 100. The thickness measurement device 200 is arranged downstream of the rolling device 300 and is used to measure the thickness of the passing pole piece tape 100 to achieve real-time monitoring of the thickness of the pole piece tape 100. When the thickness measurement device 200 detects that the thickness of the pole piece tape 100 is unqualified, the rolling device 300 can be adjusted in time until the thickness of the pole piece tape 100 is qualified. The slitting device 400 is arranged downstream of the thickness measurement device 200 and is used to slit the passing pole piece tape 100, so as to obtain at least two finished tape strips with a width size meeting the requirements.

[0055] Further, the manufacturing device further comprises a drying device (not shown in the figure) arranged between the coating device and the rolling device 300, which is used to dry the passing pole piece material belt 100, to ensure that the pole piece material belt 100 is sufficiently dried before being rolled.

[0056] The technical features of the above-mentioned embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present disclosure.

[0057] The above-mentioned embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A thickness measuring device, characterized by, The base (10) comprises: a detection mechanism (20) comprising a moving seat (21) and a thickness measuring assembly, the moving seat (21) being movably connected to the base (10) along a first direction (X1), and the thickness measuring assembly being arranged on the moving seat (21) for thickness detection of a passing material belt during movement of the moving seat (21) along the first direction (X1); a driving mechanism (30) comprising a driving assembly (36a), a connecting block (33), a first stop block (34) and a second stop block (35), the connecting block (33) being connected to a driving end of the driving assembly (36a) to enable the driving assembly (36a) to drive the connecting seat to move along the first direction (X1); the first stop block (34) and the second stop block (35) being arranged on the moving seat (21) along the first direction (X1) and spaced apart, and the connecting block (33) being located between the first stop block (34) and the second stop block (35) and having a gap with the moving seat (21). The connecting block (33) is clearance-fitted between the first stop block (34) and the second stop block (35).

2. The thickness gauge of claim 1, wherein, The driving mechanism (30) further comprises a third stop block (36) and a fourth stop block (37) arranged on the moving seat (21), the third stop block (36) and the fourth stop block (37) being arranged along a second direction (X2) and spaced apart, and the connecting block (33) being located between the third stop block (36) and the fourth stop block (37), the second direction (X2) being arranged at an angle with the first direction (X1).

3. The thickness gauge of claim 1, wherein, The connecting block (33) is clearance-fitted between the third stop block (36) and the fourth stop block (37).

4. The thickness gauge of claim 3, wherein, The connecting block (33) is located on one side of the moving seat (21) along a third direction (X3), the third direction (X3) being arranged at an angle with the first direction (X1) and the second direction (X2); 5. The thickness gauge of claim 3, wherein, The first stop block (34), the second stop block (35), the third stop block (36) and the fourth stop block (37) are all located on one side of the moving seat (21) facing the connecting block (33), one end of the connecting block (33) is connected to the driving end of the driving assembly (36a), the other end of the connecting block (33) is located in a limiting space formed by the first stop block (34), the second stop block (35), the third stop block (36) and the fourth stop block (37), and there is a gap between the connecting block (33) and the moving seat (21) along the third direction (X3). ​ 6. The thickness gauge of any one of claims 1 to 5, wherein, The driving assembly (36a) comprises a lead screw (31), a rotary driving member and a lead screw nut sleeve (32), the lead screw (31) is rotatably connected to the base (10), and the axial direction of the lead screw (31) is parallel to the first direction (X1), the rotary driving member is installed on the base (10) and is drivingly connected with the lead screw (31), and the lead screw nut sleeve (32) is threadedly connected to the lead screw (31) and is fixedly connected with the connecting block (33).

7. The thickness gauge of claim 6, wherein, At least two slide rails (11) extending longitudinally along the first direction (X1) are arranged on the base (10), and a plurality of sliding blocks (12) are arranged on the moving seat (21), each of the sliding blocks (12) is slidingly matched with a corresponding slide rail (11), part of the slide rails (11) are located on one side of the lead screw (31), and the other part of the slide rails (11) are located on the other side of the lead screw (31).

8. The thickness gauge of any one of claims 1 to 5, wherein, The thickness measuring assembly comprises a first detector (23) and a second detector (25) installed on the moving seat (21), a detection channel (B) for the material belt to pass through is formed between the first detector (23) and the second detector (25), the first detector (23) is used for detecting the distance between the first detector (23) and the side surface of the material belt facing the first detector (23), and the second detector (25) is used for detecting the distance between the second detector (25) and the side surface of the material belt facing the second detector (25).

9. The thickness gauge of claim 8, wherein, The moving seat (21) has a clearance groove (212) in communication with the detection channel (B), the clearance groove (212) extends longitudinally along the first direction (X1) and is used for avoiding the material belt passing through the detection channel (B).

10. A tabletting apparatus characterized by The coating device, the rolling device (300), the thickness measuring device (200) and the slitting device (400) are arranged in sequence. The coating device is used for coating the current collector material belt to form an active material layer and form a pole piece material belt (100), the rolling device (300) is arranged downstream of the coating device and is used for rolling the pole piece material belt (100) passing through, the thickness measuring device (200) is arranged downstream of the rolling device (300) and is used for measuring the thickness of the pole piece material belt (100) passing through, and the slitting device (400) is arranged downstream of the thickness measuring device (200) and is used for slitting the pole piece material belt (100) passing through.

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