An automatic electrode thickness measuring device

Abstract

This utility model relates to an automatic electrode thickness measurement device, including a mounting frame, a drive assembly, a thickness measurement assembly, and a housing. The thickness measurement assembly includes a grating adjustment plate, a displacement sensor, a light-shielding plate, a first photoelectric sensor, a second photoelectric sensor, a pressure mounting base, a pressure sensor, an upper pressure block, and a lower pad. The displacement sensor is fixed on the mounting frame and located on one side of the drive assembly. The grating adjustment plate is connected to the drive assembly and cooperates with the displacement sensor. The pressure mounting base is connected to the drive assembly and located in front of the drive assembly. The pressure sensor is fixed on the pressure mounting base. The upper pressure block is connected below the pressure sensor. The lower pad is fixed on the mounting frame and located below the pressure head. This utility model adds a pressure sensor to detect the pressure exerted on the electrode during thickness measurement in real time, thereby controlling the thickness measurement pressure value of the electrode, making the electrode thickness measurement pressure value adjustable, and improving the accuracy of thickness measurement.

Description

Technical Field

[0001] This utility model relates to the field of lithium electronics technology, specifically to an automatic electrode thickness measuring device. Background Technology

[0002] As a high-efficiency energy storage battery, soft-pack lithium-ion batteries require close attention to the thickness of the electrode sheets during manufacturing. The thickness of the electrode sheets affects the thickness of the battery, which in turn affects the design of the module. Therefore, special attention needs to be paid to the thickness of the electrode sheets at different process stages and the thickness of the battery at different charge levels during the manufacturing process.

[0003] In the production and testing of key lithium battery components such as battery electrodes and separators, thickness measurement is a core step in controlling product quality and performance. Traditional handheld thickness gauges suffer from limitations in accuracy (maximum ±3μm), poor consistency in manual operation (difficulty in fixing test force and position), and lack of data processing capabilities. They cannot meet the lithium battery industry's demand for refined testing such as electrode roll-up rebound, thickness measurement after disassembly, and swelling testing. They are also difficult to adapt to the efficient and accurate quality control scenarios in laboratories and production lines. Yuaneng's automatic thickness gauge was developed to meet the industry's upgrade needs. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide an automatic electrode thickness measuring device to improve the accuracy of electrode thickness measurement.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An automatic electrode thickness measuring device includes a mounting frame, a drive assembly, a thickness measuring assembly, and a housing. The housing is disposed outside the mounting frame, while the drive assembly and the thickness measuring assembly are mounted on the mounting frame and located inside the housing. The thickness measuring assembly includes a grating adjustment plate, a displacement sensor, a light-shielding plate, a first photoelectric sensor, a second photoelectric sensor, a pressure mounting base, a pressure sensor, an upper pressure block, and a lower pad. The displacement sensor is fixed on the mounting frame and located on one side of the drive assembly. The grating adjustment plate is connected to the drive assembly and cooperates with the displacement sensor. The first and second photoelectric sensors are fixed on the mounting frame. The first photoelectric sensor is located on the mounting bracket and on the other side of the drive assembly, above the second photoelectric sensor, with a gap between them; the light-shielding plate is connected to the drive assembly and cooperates with the first and second photoelectric sensors; the pressure mounting base is connected to the drive assembly and located in front of it, the pressure sensor is fixed on the pressure mounting base, the upper pressure block is connected below the pressure sensor, and the lower pad is fixed on the mounting bracket and located below the pressure head; the displacement sensor, the first photoelectric sensor, the second photoelectric sensor, and the pressure sensor are electrically connected to the drive assembly.

[0007] The drive assembly includes a servo motor, an electrical control box, a lead screw, a nut, a slider, and a slide block. The servo motor, electrical control box, and slide block are fixed on a mounting bracket. The servo motor is connected to the electrical control box. The lead screw is connected to the motor output shaft. The nut is assembled on the lead screw and fixed to the slider. The slider is movably connected to the slide block. The grating adjustment plate, light shield, and pressure mounting base are connected to the slider. The displacement sensor, the first photoelectric sensor, the second photoelectric sensor, and the pressure sensor are electrically connected to the electrical control box.

[0008] The mounting bracket is equipped with an adjustment block, the lower pad is screwed onto the adjustment block, and the upper pressure block is screwed onto the pressure sensor.

[0009] The thickness measuring component includes two or more sets of upper pressure blocks and lower pads, with each set of upper pressure blocks and lower pads cooperating with each other.

[0010] An XY moving component is connected below the adjustment block, which drives the adjustment block to move forward and backward and left and right.

[0011] The outer casing is equipped with a control panel and operation buttons, which are electrically connected to the electrical control box.

[0012] By adopting the above solution, the present invention has the following beneficial effects:

[0013] (I) Breakthrough in Precision

[0014] Compared to the accuracy of traditional equipment at around ±3μm, the automatic electrode thickness measurement device can achieve an accuracy of around ±1μm, accurately capturing even minute thickness differences. This provides more reliable data for judging the quality of products such as electrodes and separators, helping companies control key performance indicators.

[0015] (ii) Precise pressure control

[0016] Precise pressure control and quantification of the pressure head simulate thickness testing conditions under different working conditions, making the test results more consistent with actual application scenarios and providing accurate data support for studying the relationship between electrode mechanical properties and thickness changes, and optimizing production processes.

[0017] (III) Automation and Continuous Upgrading

[0018] It enables automated and continuous measurement, eliminating the interference of manual operation. It can stably and efficiently complete various tests such as electrode roll-forming rebound, coin cell / soft pack disassembly thickness measurement, and electrode swelling, making it suitable for lithium battery laboratory R&D and production line batch testing, significantly improving testing efficiency and consistency.

[0019] (iv) Advanced Data Processing Capabilities

[0020] It has strong data recording and processing capabilities, and can automatically store and analyze test data, making it easy to trace quality information, mine data value, assist enterprises in optimizing production processes and improving product yield, which is in line with the trend of digital and intelligent quality control in the lithium battery industry. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the automatic thickness measuring device of this utility model;

[0022] Figure 2 This is a first-view schematic diagram of the automatic thickness measuring device of this utility model (without casing).

[0023] Figure 3 This is a second-view schematic diagram of the automatic thickness measuring device of this utility model (without casing);

[0024] Figure 4 A first-view structural diagram of the drive component and the thickness measurement component;

[0025] Figure 5 This is a second-view structural diagram of the drive component and the thickness measurement component.

[0026] Label Explanation:

[0027] Mounting bracket 10; Adjustment block 11;

[0028] 20. Outer casing; 21. Control panel; 22. Operation buttons;

[0029] Drive assembly 30; Servo motor 31; Electrical control box 32; Lead screw 33; Nut 34; Slider 35; Slide block 36;

[0030] 41. Grating adjustment plate; 42. Displacement sensor; 43. Light shield; 44. First photoelectric sensor; 45. Second photoelectric sensor; 46. Pressure mounting base; 47. Pressure sensor; 48. Upper pressure block; 49. Lower pad. Detailed Implementation

[0031] like Figure 1-5 As shown, this utility model discloses an automatic electrode thickness measuring device, including a mounting frame 10, a drive assembly 30, a thickness measuring assembly, and a housing 20. The housing 20 is disposed outside the mounting frame 10, and the drive assembly 30 and the thickness measuring assembly are disposed on the mounting frame 10 and located inside the housing 20.

[0032] The drive assembly 30 includes a servo motor 31, an electrical control box 32, a lead screw 33, a nut 34, a slider 35, and a slide block 36. The servo motor 31, electrical control box 32, and slide block 36 are fixed on the mounting bracket 10. The servo motor 31 is connected to the electrical control box 32, the lead screw 33 is connected to the motor output shaft, the nut 34 is mounted on the lead screw 33 and fixed to the slider 35, and the slider 35 is movably connected to the slide block 36. After the servo motor 31 is started by controlling the electrical control box 32, the servo motor 31 drives the lead screw 33 to rotate. After the lead screw 33 rotates, it drives the nut 34 to move up or down along the lead screw 33. During the up and down movement of the nut 34, it drives the slider 35 to slide stably along the slide block 36.

[0033] The thickness measurement assembly includes a grating adjustment plate 41, a displacement sensor 42, a light-shielding plate 43, a first photoelectric sensor 44, a second photoelectric sensor 45, a pressure mounting base 46, a pressure sensor 47, an upper pressure block 48, and a lower pad 49. The displacement sensor 42 is fixed to the mounting bracket 10 and located on one side of the drive assembly 30. The grating adjustment plate 41 is connected to the slider 35 of the drive assembly 30 and cooperates with the displacement sensor 42. The displacement sensor 42 is electrically connected to the electrical control box 32 of the drive assembly 30. As the slider 35 moves up and down, the grating adjustment plate 41 also moves up and down accordingly.

[0034] The first photoelectric sensor 44 and the second photoelectric sensor 45 are fixed on the mounting bracket 10 and located on the other side of the drive assembly 30. The first photoelectric sensor 44 is located above the second photoelectric sensor 45, and there is a gap between the first photoelectric sensor 44 and the second photoelectric sensor 45. The light-shielding block 43 is connected to the slider 35 of the drive assembly 30 and cooperates with the first photoelectric sensor 44 and the second photoelectric sensor 45. The first photoelectric sensor 44 and the second photoelectric sensor 45 are electrically connected to the electrical control box 32 of the drive assembly 30. As the light-shielding block moves up and down, if the light-shielding block is at the position of the first photoelectric sensor 44, a first sensing signal will be generated; if the light-shielding block is at the position of the second photoelectric sensor 45, a second sensing signal will be generated.

[0035] The pressure mounting base 46 is connected to the drive assembly 30 and is located in front of the drive assembly 30. The pressure sensor 47 is fixed on the pressure mounting base 46. The upper pressure block 48 is connected below the pressure sensor 47. The lower pad 49 is fixed on the mounting bracket 10 and is located below the pressure head. The pressure sensor 47 is electrically connected to the drive assembly 30.

[0036] In this embodiment, the thickness measurement component includes two or more sets of upper pressure blocks 48 and lower pads 49, with each set of upper pressure blocks 48 and lower pads 49 engaging one-to-one. At this time, the mounting bracket 10 is provided with an adjustment block 11, the lower pad 49 is screwed onto the adjustment block 11, and the upper pressure block 48 is screwed onto the pressure sensor 47. The appropriate size of the upper pressure block 48 and lower pad 49 can be selected according to the type of electrode being measured.

[0037] An XY movement component is connected below the adjustment block 11. The XY movement component drives the adjustment block 11 to move back and forth and left and right. The XY movement component is connected to the electrical control box 32. The thickness expansion at different points on the tested electrode can be observed through the XY movement component.

[0038] The outer casing 20 is equipped with a control panel 21 and operation buttons 22, which are electrically connected to the electrical control box 32.

[0039] The working principle of this utility model is as follows:

[0040] Select the appropriate upper pressure block 48 and lower pad 49 according to the type of electrode being measured, and screw the upper pressure block 48 to the lower end of the pressure sensor 47, and screw the lower pad 49 to the adjustment plate. Then place the electrode on the lower pad 49, select the thickness measurement pressure and thickness measurement time through the operation screen, and start automatic thickness measurement. The electrical control box 32 starts the servo motor 31. The servo motor 31 drives the slider 35 to move down along the slide block 36 through the lead screw 33 and nut 34. When the user sets the pressure to 100g (or other values), the downward movement stops when the pressure sensor force value is 100g; at this time, the thickness measurement can read the thickness data on the grating ruler, and the difference between the thickness data and the thickness data under no-load (100g) condition can be used to obtain the thickness of the object to be measured. The light-shielding plate 43 works in conjunction with the first and second photoelectric sensors to achieve positioning at different locations, such as the origin position, the cleaning position, and the lower speed limit position (when the lower speed limit is reached, it indicates that the device is close to the electrode being tested, and the motor needs to run slowly to ensure the accuracy of the pressure value). The pressure setting is user-defined. When approaching the object to be tested, the movement speed slows down, slowly squeezing the object until the set pressure value is reached, at which point it stops. A PID algorithm ensures the accuracy of the pressure value, which in turn ensures the accuracy of the displacement at that position.

[0041] Compared to the accuracy of traditional equipment (around ±3μm), this novel automatic electrode thickness measurement device achieves an accuracy of approximately ±1μm, accurately capturing even minute thickness differences. This provides more reliable data for quality assessment of products such as electrodes and separators, helping companies control key performance indicators. Precise pressure control and quantification of the pressure head simulate thickness testing conditions under different operating circumstances, ensuring test results are more closely aligned with actual application scenarios. This provides accurate data support for studying the relationship between electrode mechanical properties and thickness changes, and optimizing production processes. Furthermore, this automatic electrode thickness measurement device enables automated and continuous measurement, eliminating the need for manual operation. It can stably and efficiently complete tests in multiple scenarios, including electrode rebound after rolling, thickness measurement during button cell / soft pack disassembly, and electrode swelling. It is suitable for lithium battery laboratory R&D and production line batch testing, significantly improving testing efficiency and consistency.

[0042] This invention can provide reliable data support for subsequent data processing, thereby enabling it to have strong data recording and processing capabilities, automatically store and analyze test data, facilitate the traceability of quality information, mine data value, assist enterprises in optimizing production processes and improving product yield, and conform to the trend of digital and intelligent quality control in the lithium battery industry.

[0043] The above description is merely an embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An automatic thickness measuring device for pole piece, comprising a mounting frame, a driving assembly, a thickness measuring assembly and a housing, the housing is arranged outside the mounting frame, the driving assembly and the thickness measuring assembly are arranged on the mounting frame and located in the housing, characterized in that: The thickness measurement assembly includes a grating adjustment plate, a displacement sensor, a light-shielding plate, a first photoelectric sensor, a second photoelectric sensor, a pressure mounting base, a pressure sensor, an upper pressure block, and a lower pad. The displacement sensor is fixed on the mounting frame and located on one side of the drive assembly. The grating adjustment plate is connected to the drive assembly and cooperates with the displacement sensor. The first and second photoelectric sensors are fixed on the mounting frame and located on the other side of the drive assembly. The first photoelectric sensor is located above the second photoelectric sensor, and there is a gap between the first and second photoelectric sensors. The light-shielding plate is connected to the drive assembly and cooperates with the first and second photoelectric sensors. The pressure mounting base is connected to the drive assembly and located in front of the drive assembly. The pressure sensor is fixed on the pressure mounting base. The upper pressure block is connected below the pressure sensor. The lower pad is fixed on the mounting frame and located below the pressure head. The displacement sensor, the first photoelectric sensor, the second photoelectric sensor, and the pressure sensor are electrically connected to the drive assembly.

2. The pole piece automatic thickness measuring device according to claim 1, characterized in that: The drive assembly includes a servo motor, an electrical control box, a lead screw, a nut, a slider, and a slide block. The servo motor, electrical control box, and slide block are fixed on a mounting bracket. The servo motor is connected to the electrical control box. The lead screw is connected to the motor output shaft. The nut is assembled on the lead screw and fixed to the slider. The slider is movably connected to the slide block. The grating adjustment plate, light shield, and pressure mounting base are connected to the slider. The displacement sensor, the first photoelectric sensor, the second photoelectric sensor, and the pressure sensor are electrically connected to the electrical control box.

3. The pole piece automatic thickness measuring device according to claim 1, characterized in that: The mounting bracket is equipped with an adjustment block, the lower pad is screwed onto the adjustment block, and the upper pressure block is screwed onto the pressure sensor.

4. The pole piece automatic thickness measuring device according to claim 3, characterized in that: The thickness measuring component includes two or more sets of upper pressure blocks and lower pads, with each set of upper pressure blocks and lower pads cooperating with each other.

5. The pole piece automatic thickness measuring device according to claim 3, characterized in that: An XY moving component is connected below the adjustment block, which drives the adjustment block to move forward and backward and left and right.

6. The pole piece automatic thickness measuring device according to claim 2, characterized in that: The outer casing is equipped with a control panel and operation buttons, which are electrically connected to the electrical control box.

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