Thickness measuring device for pole piece

Abstract

The utility model relates to the technical field of battery detection, and discloses a thickness measuring device for a pole piece, which comprises a base, a mounting frame arranged on the base, the mounting frame capable of moving relative to the base, a measuring mechanism arranged on the mounting frame and used for measuring the thickness of the pole piece, and an adjusting mechanism arranged between the measuring mechanism and the mounting frame. According to the pole piece thickness measuring device, the mounting frame moves relative to the base, so that the measuring mechanism is driven to measure the thickness of the pole piece in the moving process, the inclination angle of the measuring mechanism is adjusted through the adjusting mechanism, and the thickness of the pole piece can be measured according to different shapes, sizes and measurement requirements of the pole piece. The angle of the measuring mechanism is flexibly adjusted, so that the measuring probe can be contacted with the surface of the pole piece at the optimal angle, the measuring requirements of various types of pole pieces are met, and the application range of the thickness measuring device is expanded.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a device for measuring the thickness of an electrode sheet. Background Technology

[0002] In lithium battery manufacturing, controlling electrode thickness is a critical step that directly affects battery performance and reliability. Therefore, electrode thickness measurement after rolling is particularly important. However, while current electrode thickness gauges in the industry are relatively mature, they still have some technical shortcomings that urgently need improvement.

[0003] For example, when measuring thickness, it is necessary to ensure that the measuring sensor is perpendicular to the electrode surface and maintains a stable distance to ensure the accuracy of the measurement results. However, in reality, long-term use of the roller pressing device or other factors often cause the angle of the rolled electrode to tilt. Since the roller pressing device is difficult to adjust, and the angle of the measuring sensor of the equipment cannot be adjusted or the adjustment method is relatively complicated, the thickness measuring device has poor versatility and cannot be used for electrodes of different widths and different tilt angles. Utility Model Content

[0004] The purpose of this invention is to provide a thickness measuring device for electrode sheets to solve the problems in the prior art. By adjusting the angle of the measuring sensor, it can adapt to electrode sheets of different widths and tilt angles. The operation is simple and greatly improves the service life and application range of the thickness gauge.

[0005] This utility model provides a thickness measuring device for electrode sheets, comprising:

[0006] Base;

[0007] A mounting bracket is disposed on the base, and the mounting bracket is movable relative to the base;

[0008] A measuring mechanism, mounted on the mounting frame, is used to measure the thickness of the electrode sheet;

[0009] An adjustment mechanism is provided between the measuring mechanism and the mounting frame, and is used to adjust the preset angle of the measuring mechanism relative to the mounting frame.

[0010] The electrode thickness measuring device described above preferably further includes a driving mechanism connected to the base and the mounting frame, which drives the mounting frame and its measuring mechanism to move along the width direction of the electrode on the base. During the movement of the mounting frame, the measuring mechanism measures the thickness of the electrode passing through the mounting frame.

[0011] The electrode thickness measuring device described above preferably includes a calibration mechanism located on the moving path of the mounting frame and at the end of the electrode in the width direction. When the mounting frame moves along the moving path, the measuring mechanism passes through the electrode and the calibration mechanism in sequence.

[0012] In the electrode thickness measuring device described above, preferably, the measuring mechanism includes two thickness sensors arranged opposite each other, with a preset distance between the two thickness sensors, and the electrode passes between the two thickness sensors.

[0013] In the electrode thickness measuring device described above, preferably, the adjusting mechanism includes a first fixing plate, a fixing member, and a first mounting base. The first fixing plate is movably connected to the end of the mounting frame. An arc-shaped limiting groove is provided on the first fixing plate. The fixing member passes through the arc-shaped limiting groove and is connected to the mounting frame. The first fixing plate can move relative to the mounting frame along the arc-shaped limiting groove. The first mounting base is located on the side of the first fixing plate opposite to the mounting frame. The measuring mechanism is located on the first mounting base.

[0014] In the electrode thickness measuring device described above, preferably, the driving mechanism includes a first guide member, a first guide mating member, and a driving assembly. The first guide member is disposed on the base, the mounting bracket is mounted on the first guide mating member, the first guide mating member is guided and mated with the first guide member, and the driving assembly is used to drive the first guide mating member to move on the first guide member.

[0015] In the electrode thickness measuring device described above, preferably, the driving assembly includes a lead screw, a connector, a second mounting base, and a motor. The lead screw is disposed on the side of the base via the second mounting base. The connector is threadedly connected to the lead screw, one end of the connector is connected to the first guide fitting, and the motor is drively connected to the lead screw, driving the connector to reciprocate on the lead screw.

[0016] In the electrode thickness measuring device described above, preferably, a second guide is provided on the side of the base, and a second guide fitting is provided on the calibration mechanism. The second guide fitting engages with the second guide to make the position of the calibration mechanism relative to the base adjustable.

[0017] In the electrode thickness measuring device described above, preferably, the calibration mechanism includes a support rod, a third mounting base, a second fixing plate, and a calibration component. The third mounting base is disposed at the end of the support rod, the second fixing plate is rotatably connected to the third mounting base, and the calibration component is disposed on the second fixing plate.

[0018] In the electrode thickness measuring device described above, preferably, a dustproof mechanism is mounted on the base. The dustproof mechanism includes a dustproof frame and two foldable dustproof covers. The two foldable dustproof covers are located on the side of the dustproof frame away from the base. The mounting frame extends from between the two foldable dustproof covers to the outside of the foldable dustproof covers. When the mounting frame moves, the two foldable dustproof covers are compressed or extended respectively.

[0019] Compared with the prior art, this utility model moves the mounting frame relative to the base, thereby driving the measuring mechanism to measure the thickness of the electrode during the movement. By adjusting the tilt angle of the measuring mechanism, the angle of the measuring mechanism can be flexibly adjusted according to the different shapes, sizes and measurement requirements of the electrode, so that the measuring probe can contact the electrode surface at the best angle, thereby adapting to the measurement needs of various types of electrode and expanding the application range of the thickness measuring device. Attached Figure Description

[0020] Figure 1 This is a perspective view of the electrode thickness measuring device provided in an embodiment of this utility model;

[0021] Figure 2 This is a side view of the electrode thickness measuring device provided in an embodiment of this utility model;

[0022] Figure 3 This is a perspective view of the drive mechanism provided in an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the image;

[0024] Figure 5 This is an enlarged view of the measuring mechanism and adjusting mechanism of this utility model;

[0025] Figure 6 This is a side sectional view of the measuring mechanism and adjusting mechanism of this utility model;

[0026] Figure 7 This is a perspective view of the calibration mechanism of this utility model;

[0027] Figure 8 This is a perspective view of the dustproof mechanism of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10 - Base; 11 - Second guide component; 12 - Worktable; 13 - Vibration damping pad; 14 - Groove photoelectric sensor;

[0030] 20 - Mounting bracket;

[0031] 30 – Measuring mechanism; 31 – Thickness sensor;

[0032] 40 - Adjustment mechanism, 41 - First fixed plate, 410 - Arc-shaped limiting groove, 42 - Fixture, 43 - First mounting base, 44 - Positioning hole, 45 - Adjustment tooling;

[0033] 50 - First guide component, 51 - First guide mating component, 52 - Lead screw, 53 - Connector, 54 - Second mounting base, 55 - Motor, 56 - Slider mounting plate, 57 - Groove photoelectric shield, 58 - Limiting block;

[0034] 60 - Calibration mechanism, 61 - Second guide fitting, 62 - Support rod, 63 - Third mounting base, 64 - Second fixing plate, 65 - Calibration component;

[0035] 70 - Dustproof mechanism, 71 - Dustproof frame, 72 - Folding dustproof cover, 73 - Sealing plate. Detailed Implementation

[0036] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] After the rolling process, the electrode thickness is measured by an electrode thickness measuring device to understand the thickness of the electrode after rolling and to determine whether it meets the production process requirements. However, due to problems such as insufficient installation accuracy or uneven wear on the roller surface in actual rolling devices, the angle of the electrode after rolling may be offset. In some special production processes, the electrode may be conveyed at a certain tilt angle. If the electrode is not perpendicular to the thickness measuring device, it will lead to errors in the measurement results.

[0038] Therefore, this application provides a thickness measuring device for electrode sheets, see [link to relevant documentation]. Figure 1 As shown in Figure 3, the device includes a base 10, a mounting bracket 20, a measuring mechanism 30, and an adjustment mechanism 40. The angle of the measuring mechanism 30 is adjusted by the adjustment mechanism 40 to adapt it to electrodes of different angles or shapes. Wherein:

[0039] The base 10 is used to support the mounting frame 20 and the measuring mechanism 30, etc. A worktable 12 is provided at the bottom of the base 10. The height of the worktable 12 is adjustable to raise the base 10 to a preset height. A shock-absorbing pad 13 is provided between the base 10 and the worktable 12 to eliminate the influence of deformation and vibration of the worktable 12 on the measurement results of the thickness measuring device.

[0040] Mounting bracket 20 is disposed on base 10 and can move relative to base 10. In this embodiment, mounting bracket 20 is a C-shaped bracket, and the electrode sheet passes through the middle of the C-shaped bracket.

[0041] The measuring mechanism 30 is mounted on the mounting frame 20. The measuring mechanism 30 is used to measure the thickness of the moving electrode. In this embodiment, the measuring mechanism 30 is located at the end of the C-shaped frame. During the movement of the electrode on the C-shaped frame, the mounting frame 20 simultaneously moves back and forth relative to the base 10 along the width direction of the electrode, thereby measuring the thickness information of the electrode at different positions.

[0042] An adjustment mechanism 40 is located between the measuring mechanism 30 and the mounting frame 20, and is used to adjust the preset angle of the measuring mechanism 30 relative to the mounting frame 20. When the electrode enters at an angle not perpendicular to the measuring mechanism 30, the preset angle of the measuring mechanism 30 is adjusted by the adjustment mechanism 40 to keep it perpendicular to the electrode, thereby solving the problem of angle deviation of the electrode caused by the roller pressing equipment. It can also be applied to some special production processes where the electrode may be conveyed at a certain tilt angle. Compared with correcting the discharge angle of the roller pressing equipment, the method of adjusting the angle of the measuring mechanism 30 by the adjustment mechanism 40 in this application is more precise and easier to use. In addition, whether the angle of the measuring mechanism 30 is perpendicular to the electrode can be checked by auxiliary equipment or the function built into the measuring mechanism 30. Different measuring mechanisms 30 have different calibration methods, which are not limited here.

[0043] In this embodiment, see Figure 3 As shown, the thickness measuring device also includes a drive mechanism connected to the base 10 and the mounting frame 20. The drive mechanism drives the mounting frame 20 and its measuring mechanism 30 to move along the width direction of the electrode sheet on the base 10. During the movement of the mounting frame 20, the measuring mechanism 30 measures the thickness of the electrode sheet passing through the mounting frame 20. By driving the mounting frame 20 and the measuring mechanism 30 to move, measurements can be taken at different positions along the width direction of the electrode sheet, obtaining thickness information over the entire width range of the electrode sheet. This helps to comprehensively understand the uniformity of the electrode sheet thickness and promptly detect areas of abnormal thickness.

[0044] In this embodiment, see Figure 1 As shown in Figure 2, the thickness measuring device also includes a calibration mechanism 60. The calibration mechanism 60 is located on the moving path of the mounting frame 20 and at the end of the electrode in the width direction. When the mounting frame 20 moves on the moving path, the measuring mechanism 30 passes the electrode and the calibration mechanism 60 in sequence. The calibration mechanism 60 is used to ensure measurement accuracy and can periodically calibrate and standardize the measuring mechanism 30, promptly detecting and correcting measurement errors. The mounting frame 20 automatically drives the measuring mechanism 30 through the calibration mechanism 60 on the moving path, realizing the automatic calibration function of the measurement system without the need for manual operation or interruption of the production process for calibration.

[0045] See Figure 5 As shown, the measuring mechanism 30 includes two thickness sensors 31 arranged opposite each other, with a preset distance between them, and an electrode passing between the two thickness sensors 31. In the embodiments provided in this application, the two thickness sensors 31 are installed opposite each other and coaxially. The thickness sensors 31 can be contact thickness sensors, such as mechanical micrometers, pressure sensors, etc., or non-contact thickness sensors, such as laser displacement sensors. There is no limitation here, but in this embodiment, a laser displacement sensor is preferred.

[0046] In this embodiment, see Figure 5 As shown in Figure 6, the adjustment mechanism 40 includes a first fixing plate 41, a fixing member 42, and a first mounting base 43. The first fixing plate 41 is movably connected to the end of the mounting frame 20. An arc-shaped limiting groove 410 is provided on the first fixing plate 41. The fixing member 42 passes through the arc-shaped limiting groove 410 and is connected to the mounting frame 20. The first fixing plate 41 can move relative to the mounting frame 20 along the arc-shaped limiting groove 410. The first mounting base 43 is located on the side of the first fixing plate 41 away from the mounting frame 20. The measuring mechanism 30 is located on the first mounting base 43. The arc-shaped limiting groove 410 provides the measuring mechanism 30 with multiple installation angle and position options. In this embodiment, one arc-shaped limiting groove 410 can be provided, or more preferably, two parallel arc-shaped limiting grooves can be provided, providing double-track guidance. This can more accurately limit the movement trajectory of the first fixing plate 41, preventing it from shifting or twisting during movement. This makes the position adjustment of the measuring mechanism 30 more precise, which is beneficial to improving the accuracy of electrode measurement and providing more uniform and stable support for the first fixing plate 41. The fixing member 42 can be bolts or positioning pins, etc., and is not limited here. In another embodiment, the difference from this embodiment is that the arc-shaped limiting groove 410 is omitted, and the first fixing plate 41 is rotatably connected to the mounting frame 20 through a rotating shaft, so that the first fixing plate 41 can rotate relative to the mounting frame 20 at any angle around the rotating shaft. After the angle is adjusted, the first fixing plate 41 is still fixed to the mounting frame 20 by the fixing member 42.

[0047] See Figure 6As shown, in order to ensure that the upper and lower measuring mechanisms 30 remain parallel when adjusting their angles, the two first mounting seats 43 are provided with opposite and coaxial positioning holes 44. The upper and lower first mounting seats 43 are positioned by an adjustment fixture that is separable from the device through the two positioning holes 44, thereby ensuring that their adjustment angles are consistent. The specific operation steps are as follows: First, insert the adjustment fixture into the upper and lower positioning holes 44 to connect the two first mounting seats 43 together. Then, loosen the fastener 42 and the first fixing plate 41 and drive the first fixing plate 41 to rotate around the arc-shaped limiting groove 410, so that the two thickness sensing elements 31 adjust their tilt angle while always being coaxial. After the adjustment is completed, tighten the fastener 42 and the first fixing plate 41 to fix them, and then pull out the adjustment fixture.

[0048] See Figure 3 As shown in Figure 4, in order to enable the mounting bracket 20 to move along the width direction of the electrode sheet, the driving mechanism includes a first guide member 50, a first guide mating member 51, and a driving assembly. The first guide member 50 is disposed on the base 10, the mounting bracket 20 is disposed on the first guide mating member 51, the first guide mating member 51 and the first guide member 50 are guided and mated, and the driving assembly is used to drive the first guide mating member 51 to move on the first guide member 50. In the embodiments provided in this application, the first guide member 50 is two sets of linear slide rails arranged in parallel, and the first guide mating member 51 is a slider. Using two sets of linear slide rails can increase the load-bearing capacity of the entire mechanism and better support components such as the mounting frame 20. Since the mounting frame 20 is large, a slider mounting plate 56 can also be provided between the slider and the mounting frame 20 to increase the stability of the device. A shock-absorbing pad 13 is provided between the slider mounting plate 56 and the mounting frame 20 to reduce the impact of vibration of the slider mounting plate 56 during movement on the measurement results. Of course, the first guide member 50 and the first guide mating member 51 in this application can also be a ball screw and nut pair or a dovetail groove and dovetail block, etc., which are not limited here.

[0049] In one feasible implementation, the driving component can be a driving part that directly drives the first guide mating member 51 to move on the first guide member 50. However, in order to achieve high-precision movement of the mounting bracket 20, in this embodiment, see... Figure 3As shown in Figure 4, the drive assembly includes a lead screw 52, ​​a connecting member 53, a second mounting base 54, and a motor 55. The lead screw 52 is mounted on the side of the base 10 via the second mounting base 54. The connecting member 53 is threadedly connected to the lead screw 52, ​​and one end of the connecting member 53 is connected to a guide fitting. The motor 55 is driven by the lead screw 52, ​​and the motor 55 drives the connecting member 53 to reciprocate on the lead screw 52. The lead screw 52 transmission has the characteristics of high precision and can withstand large axial forces, so it can be suitable for driving the heavier mounting frame 20, allowing the mounting base to run smoothly and reliably on the linear guide rail. Furthermore, the combination of the motor 55 and the lead screw 52 can precisely control the rotation speed of the lead screw 52 by controlling the rotation speed of the motor 55, thereby precisely controlling the moving speed of the mounting frame 20.

[0050] See Figure 4 As shown, a grooved photoelectric sensor 14 is provided on one side of the lead screw 52 on the worktable 12, and a grooved photoelectric sensor shield 57 is provided on the side of the connector 53 facing the worktable 12. Limiting blocks 58 are symmetrically arranged on the base 10 along the length direction of the linear slide rail. During the movement of the mounting frame 20, the grooved photoelectric sensor 14 senses the position of the grooved photoelectric sensor shield 57 to control and determine the position of the connector 53, and abuts against the slider mounting seat through the limiting block 58 to limit the drive mechanism and prevent the mounting frame 20 from exceeding the safe range and causing an impact.

[0051] In this embodiment, a second guide member 11 is provided on the side of the base 10, and a second guide mating member 61 is provided on the calibration mechanism 60. The second guide mating member 61 and the second guide member 11 are guided and mated, so that the position of the calibration mechanism 60 relative to the base 10 is adjustable. The second guide member 11 can be a groove, and the second guide mating member 61 can be a slider. The specific structure is not limited here; see [link to documentation]. Figure 1 As shown in Figure 2, a better way to arrange the slide is to set it on the side of the worktable 12, which is convenient for movement and adjustment. The calibration mechanism 60 can be fixed at any position of the slide, so that its position can be adjusted according to the electrode sheets of different widths.

[0052] See Figure 3 and Figure 7As shown, when the angle of the measuring mechanism 30 is adjusted, the angle of the corresponding calibration mechanism 60 also needs to be adjusted. Therefore, in this embodiment, the calibration mechanism 60 includes a support rod 62, a third mounting base 63, a second fixing plate 64, and a calibration component 65. The third mounting base 63 is located at the end of the support rod 62, the second fixing plate 64 is rotatably connected to the third mounting base 63, and the calibration component 65 is located on the second fixing plate 64. The bottom of the support rod 62 is connected to the second guide fitting 61, and the second fixing plate 64 is rotatably connected to the third mounting base 63, allowing the calibration component 65 to flexibly adjust its angle around the rotation connection point. When the angle of the measuring mechanism 30 is adjusted, the calibration mechanism 60 can be quickly and conveniently adjusted to the corresponding angle through this rotation connection structure, and the calibration component 65 is parallel to the electrode.

[0053] See Figure 1 -2 and Figure 8 As shown, since the electrode sheets frequently shed dust during movement, if this dust enters the drive mechanism, it will reduce its service life. Therefore, in this embodiment, a dustproof mechanism 70 is mounted on the base 10. The dustproof mechanism 70 includes a dustproof frame 71 and two folding dustproof covers 72. The two folding dustproof covers 72 are located on the side of the dustproof frame 71 facing away from the base 10. The mounting frame 20 extends from between the two folding dustproof covers 72 to the outside of the folding dustproof covers 72. When the mounting frame 20 moves, the two folding dustproof covers 72 are compressed or extended respectively. The folding dustproof covers 72 can cover the area where the mounting frame 20 moves, preventing dust or other impurities from the electrode sheets from entering the device, reducing component wear. The folding dustproof covers 72 can be bellows covers, which have good protective performance and flexibility, and can flexibly extend and retract with the movement of the equipment components to adapt to various different movement trajectories and stroke requirements.

[0054] See Figure 8 As shown in the embodiments provided in this application, the dustproof frame 71 is provided with maintenance windows and sealing plates 73 on its sides and ends for easy maintenance.

[0055] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0056] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A thickness measuring device for an electrode sheet, characterized in that, include: Base; A mounting bracket is disposed on the base, and the mounting bracket is movable relative to the base; A measuring mechanism, mounted on the mounting frame, is used to measure the thickness of the electrode sheet; An adjustment mechanism is provided between the measuring mechanism and the mounting frame, and is used to adjust the preset angle of the measuring mechanism relative to the mounting frame.

2. The electrode thickness measuring device according to claim 1, characterized in that: The thickness measuring device further includes a driving mechanism, which connects the base and the mounting frame. The driving mechanism is used to drive the mounting frame and the measuring mechanism thereon to move along the width direction of the electrode sheet on the base. During the movement of the mounting frame, the measuring mechanism measures the thickness of the electrode sheet passing through the mounting frame.

3. The electrode thickness measuring device according to claim 1, characterized in that, The thickness measuring device also includes a calibration mechanism, which is located on the moving path of the mounting frame and at the end of the electrode in the width direction. When the mounting frame moves on the moving path, the measuring mechanism passes through the electrode and the calibration mechanism in sequence.

4. The electrode thickness measuring device according to claim 1, characterized in that, The measuring mechanism includes two thickness sensors arranged opposite each other, with a preset distance between the two thickness sensors, and the electrode passes between the two thickness sensors.

5. The electrode thickness measuring device according to claim 1, characterized in that, The adjustment mechanism includes a first fixed plate, a fixing member, and a first mounting base. The first fixed plate is movably connected to the end of the mounting frame. An arc-shaped limiting groove is provided on the first fixed plate. The fixing member passes through the arc-shaped limiting groove and is connected to the mounting frame. The first fixed plate can move relative to the mounting frame along the arc-shaped limiting groove. The first mounting base is located on the side of the first fixed plate opposite to the mounting frame. The measuring mechanism is located on the first mounting base.

6. The electrode thickness measuring device according to claim 2, characterized in that, The driving mechanism includes a first guide member, a first guide mating member, and a driving assembly. The first guide member is disposed on the base, and the mounting bracket is mounted on the first guide mating member. The first guide mating member guides and mates with the first guide member. The driving assembly is used to drive the first guide mating member to move on the first guide member.

7. The electrode thickness measuring device according to claim 6, characterized in that, The drive assembly includes a lead screw, a connector, a second mounting base, and a motor. The lead screw is disposed on the side of the base via the second mounting base. The connector is threadedly connected to the lead screw, and one end of the connector is connected to the first guide fitting. The motor is drively connected to the lead screw, and the motor drives the connector to reciprocate on the lead screw.

8. The electrode thickness measuring device according to claim 3, characterized in that, A second guide is provided on the side of the base, and a second guide fitting is provided on the calibration mechanism. The second guide fitting is guided and engaged with the second guide to make the position of the calibration mechanism relative to the base adjustable.

9. The electrode thickness measuring device according to claim 3, characterized in that, The calibration mechanism includes a support rod, a third mounting base, a second fixing plate, and a calibration component. The third mounting base is located at the end of the support rod, the second fixing plate is rotatably connected to the third mounting base, and the calibration component is located on the second fixing plate.

10. The electrode thickness measuring device according to claim 1, characterized in that, A dustproof mechanism is mounted on the base. The dustproof mechanism includes a dustproof frame and two foldable dustproof covers. The two foldable dustproof covers are located on the side of the dustproof frame away from the base. The mounting frame extends from between the two foldable dustproof covers to the outside of the foldable dustproof covers. When the mounting frame moves, the two foldable dustproof covers are compressed or extended respectively.

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