Online thickness detection device and system

Abstract

The utility model discloses an on-line thickness detection device and system. The device comprises a C-shaped arm beam, a guide roller mechanism, a lead screw transmission mechanism, a first displacement sensor assembly and a second displacement sensor assembly. The guide roller mechanism is used for rolling a to-be-detected pole piece, the first displacement sensor assembly is used for detecting a first distance of the upper surface of the rolled to-be-detected pole piece, and the second displacement sensor assembly is used for detecting a second distance of the lower surface of the rolled to-be-detected pole piece. The screw rod transmission mechanism is used for driving the C-shaped arm beam to move; the two displacement sensors are connected through the C-shaped arm beam, the upper surface distance and the lower surface distance of the to-be-detected pole piece are detected through the two displacement sensors respectively, the thickness of the to-be-detected pole piece is calculated through the distance between the displacement sensors and the upper surface and the distance between the displacement sensors and the lower surface of the to-be-detected pole piece, the structure is simple, and accuracy is high.

Description

Technical Field

[0001] This utility model relates to the field of online thickness detection technology for lithium battery electrode sheets, and in particular to an online thickness detection device and system. Background Technology

[0002] A lithium-ion battery electrode winding machine is a key piece of equipment used in the manufacture of lithium-ion batteries. It is primarily used to wind positive electrode, negative electrode, and separator materials into a battery cell. The main components include an unwinding device, a web guiding system, a tension control system, a winding head, a cutting device, and a winding device. The positive and negative electrode sheets and the separator are unwound from the unwinding device, and the web guiding system and tension control system ensure that the materials are aligned and the tension is appropriate. Driven by the winding head, the electrode sheets and separator are wound sequentially to form a battery cell. After winding, the material is cut by the cutting device, and the battery cell is wound and secured by the winding device.

[0003] However, lithium battery electrode winding machines themselves cannot monitor electrode thickness in real time, making it impossible to guarantee the consistency of energy density for each battery core. Therefore, existing technologies have proposed installing thickness detection devices on lithium battery electrode winding machines. For example, patent CN 222188263U discloses an electrode separator thickness measuring device and winding machine, relating to the field of lithium-ion battery production equipment. The electrode separator thickness measuring device includes a roller support, a fixed roller, a floating roller, a drive mechanism, a phase measuring mechanism, and a displacement sensor. The drive mechanism is connected to the floating roller and is used to drive the floating roller to press against the fixed roller. The phase measuring mechanism is used to detect a first position on the floating roller and a second position on the fixed roller. The displacement sensor is used to measure the floating displacement of the floating roller when the first and second positions correspond. In this solution, the displacement sensor is used to measure the floating displacement between the floating roller and the fixed roller to obtain the electrode thickness. This solution requires high precision in the fit between the various components, resulting in high production costs and unreliable measurement accuracy. For example, patent text CN219736300U discloses a linear detection device for the thickness of lithium battery electrode sheets, including a support assembly, a drive assembly, and a measurement assembly. The drive assembly is fixed on the support assembly, and the measurement assembly includes a measurement plate and a probe assembly fixed on the measurement plate. The measurement plate is slidably connected to the support assembly, and one end of the measurement plate is connected to the output end of the drive assembly. The probe of the probe assembly is set above the electrode sheet. This solution requires the setting of three displacement sensors, which is complex in structure and requires manual operation, resulting in low production efficiency. Utility Model Content

[0004] This invention provides an online thickness detection device and system with a simple structure, which can effectively reduce production costs, ensure measurement accuracy, and improve production efficiency.

[0005] An online thickness detection device includes a C-shaped arm beam, a guide roller mechanism, a screw drive mechanism, a first displacement sensor assembly, and a second displacement sensor assembly; the C-shaped arm beam is connected to the screw drive mechanism, the guide roller mechanism is configured to cooperate with the C-shaped arm beam, and the first displacement sensor assembly and the second displacement sensor assembly are respectively disposed at the ends of the C-shaped arm beam;

[0006] The guide roller mechanism is used to roll the electrode sheet to be tested. The first displacement sensor assembly is used to detect the first distance on the upper surface of the electrode sheet to be tested after rolling. The second displacement sensor assembly is used to detect the second distance on the lower surface of the electrode sheet to be tested after rolling. The screw drive mechanism is used to drive the C-shaped arm beam to move.

[0007] Furthermore, the guide roller mechanism includes a first crossbeam, a second crossbeam, a first guide roller, and a second guide roller. The two ends of the first guide roller and the second guide roller are respectively mounted on the first crossbeam and the second crossbeam, and the first guide roller and the second guide roller are mounted at different heights. The diameter of the first guide roller is smaller than the diameter of the second guide roller, and the first guide roller and the second guide roller are arranged in parallel.

[0008] Furthermore, the guide roller mechanism also includes a third guide roller and a fourth guide roller. The two ends of the third guide roller and the fourth guide roller are respectively installed on the first crossbeam and the second crossbeam, and the installation heights of the third guide roller and the fourth guide roller are different. The diameter of the third guide roller is smaller than the diameter of the fourth guide roller, and the third guide roller and the fourth guide roller are arranged in parallel.

[0009] Furthermore, the lead screw transmission mechanism includes a slider, a slide rail, a lead screw, and a drive motor. The C-shaped arm beam is connected to the slider via an arm beam base. The slider is mounted on the slide rail. The drive motor is connected to the lead screw and is used to drive the slider to slide on the slide rail via the lead screw. The sliding direction of the slider is parallel to the axial direction of the guide roller in the guide roller mechanism.

[0010] Furthermore, the first displacement sensor assembly includes a first displacement sensor and a first cooling plate. The first cooling plate is fixedly connected to the first end of the C-shaped arm beam. The first displacement sensor is fixed on the first cooling plate. The first cooling plate has a hollow structure, and the hollow part of the first cooling plate corresponds to the first displacement sensor. The first cooling plate is used to conduct compressed air to the first displacement sensor through the hollow part.

[0011] Furthermore, the second displacement sensor assembly includes a second displacement sensor and a second cooling plate. The second cooling plate is fixedly connected to the second end of the C-shaped arm beam. The second displacement sensor is fixed on the second cooling plate. The second cooling plate has a hollow structure, and the hollow part of the second cooling plate corresponds to the second displacement sensor. The second cooling plate is used to conduct compressed air to the second displacement sensor through the hollow part.

[0012] Furthermore, a first fine-tuning mechanism is provided between the first cooling plate and the first end of the C-shaped arm beam. The first fine-tuning mechanism includes a fixed panel, a first housing, a first movable mechanism, a first movable panel, a first fine-tuning knob, and a first locking bolt. The fixed panel is fixedly connected to the first housing. The first movable mechanism is disposed inside the first housing. The first movable panel is connected to the first movable mechanism and is located outside the first housing. The first fine-tuning knob is connected to the first movable mechanism. The first locking bolt is connected to the first movable mechanism. The first fine-tuning knob and the first locking bolt are disposed outside the first housing.

[0013] The first locking bolt is used to lock or unlock the first movable mechanism, and the first fine-tuning knob is used to control and adjust the first movable mechanism when the first movable mechanism is unlocked, thereby driving the first movable panel to move along its vertical direction.

[0014] The fixed panel is connected to the first end of the C-shaped arm beam, and the first movable panel is connected to the first cooling plate.

[0015] Furthermore, a second fine-tuning mechanism is provided between the second cooling plate and the second end of the C-shaped arm beam. The second fine-tuning mechanism includes a second housing, a second movable mechanism, a second movable panel, a second fine-tuning knob, and a second locking bolt. The second movable mechanism is located inside the second housing. The second movable panel is connected to the second movable mechanism and is located outside the second housing. The second fine-tuning knob is connected to the second movable mechanism. The second locking bolt is connected to the second movable mechanism. The second fine-tuning knob and the second locking bolt are located outside the second housing.

[0016] The second locking bolt is used to lock or unlock the second movable mechanism, and the second fine-tuning knob is used to control and adjust the second movable mechanism in the unlocked state, thereby driving the second movable panel to move along its parallel direction.

[0017] The second housing is connected to the second end of the C-shaped arm beam, and the second movable panel is connected to the second cooling plate.

[0018] Furthermore, the C-shaped arm beam is provided with a standard plate fixing seat, which is located between the first displacement sensor assembly and the second displacement sensor assembly;

[0019] The standard plate fixing base includes a fixing plate, a pressure plate connector, a clamping seat, a first pressure plate, a second pressure plate, and a compressed air interface. The fixing plate is fixedly connected to the C-shaped arm beam. One end of the pressure plate connector is fixedly connected to the fixing plate. The clamping seat is fixedly connected to the pressure plate connector. The clamping seat extends to a first clamping part and a second clamping part at both ends. The first pressure plate and the second pressure plate are respectively connected to the first clamping part and the second clamping part. The pressure plate connector and the clamping seat are respectively provided with through holes, and the through holes are connected to the compressed air interface.

[0020] An online thickness detection system for a lithium battery electrode winding machine includes the above-mentioned device and also includes the lithium battery electrode winding machine.

[0021] The online thickness detection device and system provided by this utility model have at least the following beneficial effects:

[0022] (1) Two sets of displacement sensors are connected by a C-shaped arm beam. The two sets of displacement sensors are used to detect the distance between the upper surface and the lower surface of the electrode to be tested. The thickness of the electrode to be tested is calculated by the distance from the displacement sensor to the upper surface and the distance to the lower surface of the electrode to be tested. The structure is simple and the displacement sensor can be moved by the screw drive mechanism to detect the thickness at different positions on the electrode to be tested.

[0023] (2) By setting two sets of guide rollers, the electrode to be tested can be effectively supported, preventing deformation or breakage. This also ensures that the electrode remains stable and flat when passing the displacement sensor.

[0024] (3) The displacement sensor is purged and cooled by the cooling plate to avoid the dust on the displacement sensor probe from affecting the detection, prevent the displacement sensor from being used for a long time at an excessively high temperature, and improve the accuracy of thickness detection.

[0025] (4) The two sets of displacement sensors are adjusted laterally and longitudinally through the fine-tuning mechanism, so that the two sets of displacement sensors can be aligned, ensuring the coaxiality of the two sets of displacement sensors, thereby ensuring the reliability and accuracy of the detection.

[0026] (5) By setting a standard plate fixing base, the standard plate is fixed and purged, which facilitates the calibration of the displacement sensor and further ensures the accuracy and reliability of the electrode thickness detection. Attached Figure Description

[0027] Figure 1This is a schematic diagram of one embodiment of the online thickness detection device provided by this utility model.

[0028] Figure 2 This is a top view of one embodiment of the online thickness detection device provided by this utility model.

[0029] Figure 3 This is a rear view of one embodiment of the online thickness detection device provided by this utility model.

[0030] Figure 4 This is a partial schematic diagram of one embodiment of the online thickness detection device provided by this utility model.

[0031] Figure 5 This is a schematic diagram of the first fine-tuning mechanism in the online thickness detection device provided by this utility model.

[0032] Figure 6 This is a schematic diagram of the second fine-tuning mechanism in the online thickness detection device provided by this utility model.

[0033] Figure 7 This is a schematic diagram of one embodiment of the standard sheet fixing base in the online thickness detection device provided by this utility model.

[0034] Figure label:

[0035] 1-C-shaped arm beam; 2-First crossbeam; 3-Second crossbeam; 4-First guide roller; 5-Second guide roller; 6-Third guide roller; 7-Fourth guide roller; 8-Support base; 9-Support frame; 10-Slider; 11-Slide rail; 12-Lead screw; 13-Drive motor; 14-Arm beam base; 15-First displacement sensor; 16-First cooling plate; 17-Second displacement sensor; 18-Second cooling plate; 19-First fine-tuning mechanism; 20-Fixed panel; 21-First 22-Housing housing; 23-First movable panel; 24-First fine-tuning knob; 25-First locking bolt; 26-Second fine-tuning mechanism; 27-Second housing; 28-Second movable panel; 29-Second fine-tuning knob; 30-Standard plate fixing seat; 31-Fixing plate; 32-Pressure plate connector; 33-Clamping seat; 34-First pressure plate; 35-Second pressure plate; 36-Compressed air interface; 37-First clamping part; 38-Second clamping part. Detailed Implementation

[0036] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0037] refer to Figures 1 to 3In some embodiments, an online thickness detection device is provided, including a C-shaped arm beam 1, a guide roller mechanism, a screw drive mechanism, a first displacement sensor assembly, and a second displacement sensor assembly; the C-shaped arm beam is connected to the screw drive mechanism, the guide roller mechanism is configured to cooperate with the C-shaped arm beam 1, and the first displacement sensor assembly and the second displacement sensor assembly are respectively disposed at the ends of the C-shaped arm beam 1;

[0038] The guide roller mechanism is used to roll the electrode sheet to be tested. The first displacement sensor assembly is used to detect the first distance on the upper surface of the electrode sheet to be tested after rolling. The second displacement sensor assembly is used to detect the second distance on the lower surface of the electrode sheet to be tested after rolling. The screw drive mechanism is used to drive the C-shaped arm beam 1 to move.

[0039] The first distance and the second distance are used to calculate the thickness of the electrode to be tested. For example, the thickness of the electrode to be tested can be obtained by subtracting the first distance and the second distance from the distance between the working surface of the first displacement sensor and the working surface of the second displacement sensor.

[0040] Furthermore, the guide roller mechanism includes a first crossbeam 2, a second crossbeam 3, a first guide roller 4, and a second guide roller 5. The two ends of the first guide roller 4 and the second guide roller 5 are respectively mounted on the first crossbeam 2 and the second crossbeam 3, and the installation heights of the first guide roller 4 and the second guide roller 5 are different. The diameter of the first guide roller 4 is smaller than the diameter of the second guide roller 5, and the first guide roller 4 and the second guide roller 5 are arranged in parallel.

[0041] Furthermore, the guide roller mechanism also includes a third guide roller 6 and a fourth guide roller 7. The two ends of the third guide roller 6 and the fourth guide roller 7 are respectively installed on the first crossbeam 2 and the second crossbeam 3, and the installation heights of the third guide roller 6 and the fourth guide roller 7 are different. The diameter of the third guide roller 6 is smaller than the diameter of the fourth guide roller 7, and the third guide roller 6 and the fourth guide roller 7 are arranged in parallel.

[0042] Specifically, the guide roller mechanism includes guide rollers, which may include a set of guide rollers, namely the first guide roller 4 and the second guide roller 5, or the third guide roller 6 and the fourth guide roller 7, or two sets of guide rollers, namely the first guide roller 4, the second guide roller 5, the third guide roller 6 and the fourth guide roller 7, wherein the first guide roller 4, the second guide roller 5, the third guide roller 6 and the fourth guide roller 7 are all arranged in parallel.

[0043] Specifically, the height difference between the first guide roller 4 and the second guide roller 5, as well as the height difference between the third guide roller 6 and the fourth guide roller 7, can be set according to actual needs, preferably so that the guide rollers can rotate. The distance between the two sets of guide rollers should be close to avoid the influence of material vibration on the measurement. The diameter of the guide rollers should not exceed the working distance of the displacement sensor.

[0044] During the transport of the electrode to be tested, the electrode may sag due to its own weight or tension. By setting up two sets of guide rollers, the electrode to be tested can be effectively supported, preventing deformation or breakage. This also ensures that the electrode remains stable and flat when passing the displacement sensor.

[0045] Furthermore, the first guide roller 4 and the third guide roller 6 provide downward pressure, while the second guide roller 5 and the fourth guide roller 7 provide upward pressure, which can reduce the surface wrinkles of the electrode to be tested, thereby reducing the measurement error caused by the unevenness of the electrode surface.

[0046] Furthermore, in some embodiments, the detection device further includes a support base 8, and the first crossbeam 2 and the second crossbeam 3 are fixedly connected to the support base 8 via a support frame 9.

[0047] Furthermore, the lead screw transmission mechanism includes a slider 10, a slide rail 11, a lead screw 12, and a drive motor 13. The C-shaped arm beam 1 is connected to the slider 10 through the arm beam base 14. The slider 10 is mounted on the slide rail 11. The drive motor 13 is connected to the lead screw 12 and is used to drive the slider 10 to slide on the slide rail 11 through the lead screw 12. The sliding direction of the slider 10 is parallel to the axial direction of the guide roller in the guide roller mechanism, that is, parallel to the first guide roller, second guide roller, third guide roller, or fourth guide roller in the guide roller mechanism.

[0048] The slide rail 11, lead screw 12, and drive motor 13 are all mounted on the support base 8. The drive motor 13 drives the slider 10 to slide on the slide rail 11 through the lead screw 12, thereby driving the entire C-shaped arm beam to slide within a preset range. The sliding direction is parallel to the axis of the first guide roller, so that the first displacement sensor assembly and the second displacement sensor assembly at both ends of the C-shaped arm beam 1 can scan along the width direction of the electrode to be tested and measure the thickness at different positions in the width direction of the electrode to be tested.

[0049] The transmission direction of the electrode to be tested is its length direction.

[0050] The C-shaped boom beam 1 includes a first end and a second end.

[0051] Furthermore, the first displacement sensor assembly includes a first displacement sensor 15 and a first cooling plate 16. The first cooling plate 16 is fixedly connected to the first end of the C-shaped arm beam 1. The first displacement sensor 15 is fixed on the first cooling plate 16. The first cooling plate 16 has a hollow structure, and the hollow part corresponds to the first displacement sensor 15. The first cooling plate 16 is used to conduct compressed air to the first displacement sensor 15 through the hollow part. The compressed air blows the first displacement sensor 15 through the first cooling plate 16 to cool and clean the first displacement sensor 15.

[0052] Furthermore, the second displacement sensor assembly includes a second displacement sensor 17 and a second cooling plate 18. The second cooling plate 18 is fixedly connected to the second end of the C-shaped arm beam 1. The second displacement sensor 17 is fixed on the second cooling plate 18. The second cooling plate 18 has a hollow structure, with the hollow part corresponding to the second displacement sensor 17. The second cooling plate 18 is used to conduct compressed air to the second displacement sensor 17 through the hollow part, and to cool and clean the second displacement sensor 17 by blowing.

[0053] Specifically, taking the normal operating state of the device as a reference, the first end is the upper end of the C-shaped arm beam, and the second end is the lower end of the C-shaped arm beam. That is, the first cooling plate 16 is located at the upper end of the C-shaped arm beam 1, and the second cooling plate 18 is located at the lower end of the C-shaped arm beam. Compressed air can be provided by a compression pump, which is connected to the first cooling plate 16 and the second cooling plate 18.

[0054] Further, refer to Figures 4-6 A first fine-tuning mechanism 19 is also provided between the first cooling plate 16 and the first end of the C-shaped arm beam 1. The first fine-tuning mechanism 19 includes a fixed panel 20, a first housing 21, a first movable mechanism, a first movable panel 22, a first fine-tuning knob 23, and a first locking bolt 24. The fixed panel 20 is fixedly connected to the first housing 21. The first movable mechanism is located inside the first housing 21. The first movable panel 22 is connected to the first movable mechanism and is located outside the first housing 21. The first fine-tuning knob 23 is connected to the first movable mechanism. The first locking bolt 24 is connected to the first movable mechanism. The first fine-tuning knob 23 and the first locking bolt 24 are located outside the first housing 21.

[0055] The first locking bolt 24 is used to lock or unlock the first movable mechanism, and the first fine-tuning knob 23 is used to control and adjust the first movable mechanism in the unlocked state, thereby driving the first movable panel 22 to move along its vertical direction.

[0056] The fixed panel 20 is connected to the first end of the C-shaped arm beam 1, and the first movable panel 22 is connected to the first cooling plate 16.

[0057] Specifically, the first movable mechanism is locked and unlocked by manually rotating the first locking bolt 24. In the locked state, the first movable mechanism is locked. In the unlocked state, the first movable mechanism can be controlled and adjusted by rotating the first fine-tuning knob 23, which drives the first movable panel 22 to move along its vertical direction. The vertical direction of the first movable panel 23 is the perpendicular direction of the mounting surface of the first movable panel 23. With the normal use state of the entire device as a reference, the movement direction of the first movable panel is consistent with the axial direction of the guide roller in the guide roller mechanism. That is, the first cooling plate 16 and the first displacement sensor 15 can be slightly moved along the axial direction of the guide roller by the first fine-tuning mechanism 19. The adjustment accuracy of the first fine-tuning mechanism 19 is at the millimeter level.

[0058] Furthermore, a second fine-tuning mechanism 25 is provided between the second cooling plate 18 and the second end of the C-shaped arm beam 1. The second fine-tuning mechanism 25 includes a second housing 26, a second movable mechanism, a second movable panel 27, a second fine-tuning knob 28, and a second locking bolt 29. The second movable mechanism is located inside the second housing 26. The second movable panel 27 is connected to the second movable mechanism and is located outside the second housing 26. The second fine-tuning knob 28 is connected to the second movable mechanism. The second locking bolt 29 is connected to the second movable mechanism. The second fine-tuning knob 28 and the second locking bolt 29 are located outside the second housing 26.

[0059] The second locking bolt 29 is used to lock or unlock the second movable mechanism, and the second fine-tuning knob 28 is used to control and adjust the second movable mechanism when it is unlocked, thereby driving the second movable panel 27 to move along its parallel direction.

[0060] The second housing 26 is connected to the second end of the C-shaped arm beam 1, and the second movable panel 27 is connected to the second cooling plate 18.

[0061] Specifically, the second movable mechanism is locked and unlocked by manually rotating the second locking bolt 29. In the locked state, the second movable mechanism is locked. In the unlocked state, the second movable mechanism can be controlled and adjusted by rotating the second fine-tuning knob 28, which drives the second movable panel 27 to move in its parallel direction. The parallel direction of the second movable panel 23 is the direction parallel to the mounting surface of the second movable panel 23. With the normal use state of the entire device as a reference, the movement direction of the second movable panel 23 is horizontal. That is, the second cooling plate 18 and the second displacement sensor 17 can be slightly moved in the horizontal direction by the second fine-tuning mechanism 25. The adjustment accuracy of the second fine-tuning mechanism 19 is at the millimeter level.

[0062] Furthermore, through the cooperation of the first fine-tuning mechanism 19 and the second fine-tuning mechanism 2, the first displacement sensor and the second displacement sensor are finely adjusted longitudinally and laterally, respectively, so that the two sets of displacement sensors can be aligned, ensuring the coaxiality of the two sets of displacement sensors, thereby ensuring the reliability and accuracy of the detection.

[0063] Furthermore, a standard plate fixing seat 30 is also provided on the C-shaped arm beam 1, and the standard plate fixing seat 20 is located between the first displacement sensor assembly and the second displacement sensor assembly.

[0064] Further, refer to Figure 7 The standard plate fixing base 30 includes a fixing plate 31, a pressure plate connector 32, a clamping base 33, a first pressure plate 34, a second pressure plate 35, and a compressed air interface 36. The fixing plate 31 is fixedly connected to the C-shaped arm beam 1. One end of the pressure plate connector 32 is fixedly connected to the fixing plate 31. The clamping base 33 is fixedly connected to the pressure plate connector 32. The clamping base 33 has a first clamping part 37 and a second clamping part 38 extending from both ends. The first pressure plate 34 and the second pressure plate 35 are respectively connected to the first clamping part 37 and the second clamping part 38. The pressure plate connector 32 and the clamping base 33 are respectively provided with through holes, and the through holes are connected to the compressed air interface 36.

[0065] Specifically, in practical applications, a standard plate is needed to calibrate the first displacement sensor and the second displacement sensor. The standard plate is fixed by the first pressure plate 34 and the second pressure plate 35. Compressed air is introduced through the compressed air interface to remove dust from the surface of the standard plate. After that, the first displacement sensor and the second displacement sensor can be calibrated.

[0066] In some embodiments, an online thickness detection system is also provided, including the above-described apparatus, and further including a lithium battery electrode winding machine.

[0067] The online thickness detection device and system for lithium battery electrode winding machines provided in the above embodiments have at least the following beneficial effects:

[0068] (1) Two sets of displacement sensors are connected by a C-shaped arm beam. The two sets of displacement sensors are used to detect the distance between the upper surface and the lower surface of the electrode to be tested. The thickness of the electrode to be tested is calculated by the distance from the displacement sensor to the upper surface and the distance to the lower surface of the electrode to be tested. The structure is simple and the displacement sensor can be moved by the screw drive mechanism to detect the thickness at different positions on the electrode to be tested.

[0069] (2) By setting two sets of guide rollers, the electrode to be tested can be effectively supported, preventing deformation or breakage. This also ensures that the electrode remains stable and flat when passing the displacement sensor.

[0070] (3) The displacement sensor is purged and cooled by the cooling plate to avoid the dust on the displacement sensor probe from affecting the detection, prevent the displacement sensor from being used for a long time at an excessively high temperature, and improve the accuracy of thickness detection.

[0071] (4) The two sets of displacement sensors are adjusted laterally and longitudinally through the fine-tuning mechanism, so that the two sets of displacement sensors can be aligned, ensuring the coaxiality of the two sets of displacement sensors, thereby ensuring the reliability and accuracy of the detection.

[0072] (5) By setting a standard plate fixing base, the standard plate is fixed and purged, which facilitates the calibration of the displacement sensor and further ensures the accuracy and reliability of the electrode thickness detection.

[0073] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. An online thickness detection device, characterized in that, It includes a C-shaped arm beam, a guide roller mechanism, a lead screw drive mechanism, a first displacement sensor assembly, and a second displacement sensor assembly; the C-shaped arm beam is connected to the lead screw drive mechanism, the guide roller mechanism is configured to cooperate with the C-shaped arm beam, and the first displacement sensor assembly and the second displacement sensor assembly are respectively disposed at the ends of the C-shaped arm beam; The guide roller mechanism is used to roll the electrode sheet to be tested. The first displacement sensor assembly is used to detect the first distance on the upper surface of the electrode sheet to be tested after rolling. The second displacement sensor assembly is used to detect the second distance on the lower surface of the electrode sheet to be tested after rolling. The screw drive mechanism is used to drive the C-shaped arm beam to move.

2. The apparatus according to claim 1, characterized in that, The guide roller mechanism includes a first crossbeam, a second crossbeam, a first guide roller, and a second guide roller. The two ends of the first guide roller and the second guide roller are respectively mounted on the first crossbeam and the second crossbeam, and the first guide roller and the second guide roller are mounted at different heights. The diameter of the first guide roller is smaller than the diameter of the second guide roller, and the first guide roller and the second guide roller are arranged in parallel.

3. The apparatus according to claim 2, characterized in that, The guide roller mechanism further includes a third guide roller and a fourth guide roller. The two ends of the third guide roller and the fourth guide roller are respectively installed on the first crossbeam and the second crossbeam, and the installation heights of the third guide roller and the fourth guide roller are different. The diameter of the third guide roller is smaller than the diameter of the fourth guide roller, and the third guide roller and the fourth guide roller are arranged in parallel.

4. The apparatus according to claim 1, characterized in that, The lead screw transmission mechanism includes a slider, a slide rail, a lead screw, and a drive motor. The C-shaped arm beam is connected to the slider via an arm beam base. The slider is mounted on the slide rail. The drive motor is connected to the lead screw and is used to drive the slider to slide on the slide rail via the lead screw. The sliding direction of the slider is parallel to the axial direction of the guide roller in the guide roller mechanism.

5. The apparatus according to claim 1, characterized in that, The first displacement sensor assembly includes a first displacement sensor and a first cooling plate. The first cooling plate is fixedly connected to the first end of the C-shaped arm beam. The first displacement sensor is fixed on the first cooling plate. The first cooling plate has a hollow structure. The hollow part of the first cooling plate corresponds to the first displacement sensor. The first cooling plate is used to conduct compressed air to the first displacement sensor through the hollow part.

6. The apparatus according to claim 1, characterized in that, The second displacement sensor assembly includes a second displacement sensor and a second cooling plate. The second cooling plate is fixedly connected to the second end of the C-shaped arm beam. The second displacement sensor is fixed on the second cooling plate. The second cooling plate has a hollow structure, and the hollow part of the second cooling plate corresponds to the second displacement sensor. The second cooling plate is used to conduct compressed air to the second displacement sensor through the hollow part.

7. The apparatus according to claim 5, characterized in that, A first fine-tuning mechanism is also provided between the first cooling plate and the first end of the C-shaped arm beam. The first fine-tuning mechanism includes a fixed panel, a first housing, a first movable mechanism, a first movable panel, a first fine-tuning knob, and a first locking bolt. The fixed panel is fixedly connected to the first housing. The first movable mechanism is disposed inside the first housing. The first movable panel is connected to the first movable mechanism and is located outside the first housing. The first fine-tuning knob is connected to the first movable mechanism. The first locking bolt is connected to the first movable mechanism. The first fine-tuning knob and the first locking bolt are disposed outside the first housing. The first locking bolt is used to lock or unlock the first movable mechanism, and the first fine-tuning knob is used to control and adjust the first movable mechanism when the first movable mechanism is unlocked, thereby driving the first movable panel to move along its vertical direction. The fixed panel is connected to the first end of the C-shaped arm beam, and the first movable panel is connected to the first cooling plate.

8. The apparatus according to claim 6, characterized in that, A second fine-tuning mechanism is also provided between the second cooling plate and the second end of the C-shaped arm beam. The second fine-tuning mechanism includes a second housing, a second movable mechanism, a second movable panel, a second fine-tuning knob, and a second locking bolt. The second movable mechanism is located inside the second housing. The second movable panel is connected to the second movable mechanism and is located outside the second housing. The second fine-tuning knob is connected to the second movable mechanism. The second locking bolt is connected to the second movable mechanism. The second fine-tuning knob and the second locking bolt are located outside the second housing. The second locking bolt is used to lock or unlock the second movable mechanism, and the second fine-tuning knob is used to control and adjust the second movable mechanism in the unlocked state, thereby driving the second movable panel to move along its parallel direction. The second housing is connected to the second end of the C-shaped arm beam, and the second movable panel is connected to the second cooling plate.

9. The apparatus according to claim 1, characterized in that, The C-shaped arm beam is equipped with a standard plate fixing seat, which is located between the first displacement sensor assembly and the second displacement sensor assembly. The standard plate fixing base includes a fixing plate, a pressure plate connector, a clamping seat, a first pressure plate, a second pressure plate, and a compressed air interface. The fixing plate is fixedly connected to the C-shaped arm beam. One end of the pressure plate connector is fixedly connected to the fixing plate. The clamping seat is fixedly connected to the pressure plate connector. The clamping seat extends to a first clamping part and a second clamping part at both ends. The first pressure plate and the second pressure plate are respectively connected to the first clamping part and the second clamping part. The pressure plate connector and the clamping seat are respectively provided with through holes, and the through holes are connected to the compressed air interface.

10. An online thickness detection system, characterized in that, The device includes the apparatus as described in any one of claims 1-9, and further includes a lithium battery electrode winding machine.

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