A device for testing the conductivity of carbon foil

Abstract

This utility model relates to the field of conductive testing technology for carbon-coated foil, and discloses a device for testing the conductive properties of carbon-coated foil. The supporting structure includes a testing platform, and the testing structure includes a testing device and a fixed cylinder fixed to the testing platform. A lead screw is installed inside the fixed cylinder, one end of which is driven by a first motor. A threaded block, movable axially along the fixed cylinder, is threaded onto the lead screw. The threaded block is connected to a testing head via a mounting plate. The testing head is connected to the testing device via a connecting line, and its lower end face contacts the surface of the carbon-coated foil to be tested. The guiding component includes a sliding groove on the fixed cylinder, and the threaded block slides into the groove via a lateral extension. A retracting structure and a pressing structure are respectively installed on the testing platform for tension control and positioning of the carbon-coated foil. This utility model achieves precise lifting and lowering of the testing head through lead screw transmission driven by a first motor, ensuring stable contact between the testing head and the carbon-coated foil and guaranteeing the reliability of the injected electrical signal.

Description

Technical Field

[0001] This utility model relates to the field of carbon foil conductivity testing technology, and in particular to a device for testing the conductivity of carbon foil. Background Technology

[0002] As a key current collector material, the conductivity of carbon-coated foil directly affects the energy density, power characteristics, and cycle life of devices. To ensure that the quality of carbon-coated foil products meets production requirements, it is necessary to accurately test the conductivity of its surface. Currently, relevant testing devices are usually based on the principle of conductivity measurement, using contact or non-contact sensors to collect electrical signals from the carbon-coated foil. These signals are then analyzed by a data processing system to achieve a quantitative assessment of the conductivity of the carbon-coated foil, providing an important basis for quality control and process optimization during production.

[0003] In existing technologies, the detection head is prone to poor contact or uneven pressure, which affects the stability of the injected electrical signal. The acquisition of data such as voltage and current may not be synchronized, resulting in a decrease in the accuracy of the calculated conductivity performance indicators. The system cannot generate a test report that includes parameters and uniformity, which is not conducive to the efficient analysis and control of the quality of carbon-coated foil. Utility Model Content

[0004] Given that the existing detection heads are prone to poor contact or uneven pressure, which affects the stability of electrical signal injection, the acquisition of data such as voltage and current may not be synchronized, resulting in a decrease in the accuracy of the calculated conductivity performance indicators, and the system is unable to generate a detection report that includes parameters and uniformity, which is not conducive to the efficient analysis and control of carbon foil quality, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a carbon foil conductivity testing device, with a support structure including a testing platform; The detection structure includes a detection device and a fixed cylinder fixed on the detection table. A lead screw is provided inside the fixed cylinder. One end of the lead screw is driven by a first motor. A threaded block that can move along the axial direction of the fixed cylinder is threadedly connected to the lead screw. The threaded block is connected to a detection head through a mounting plate. The detection head is electrically connected to the detection device through a connecting line. The lower end face of the detection head is configured to contact the surface of the carbon-coated foil to be detected. The guide assembly includes a groove provided on the fixed cylinder, and the threaded block is in sliding engagement with the groove through a lateral extension; The tension control and positioning of the carbon foil are respectively mounted on the testing platform.

[0006] In a preferred embodiment of the carbon foil conductivity testing device of this utility model, the pressing structure includes two sets of pressing units symmetrically arranged on the testing platform, each set of pressing units including: A vertically arranged support frame, the bottom of which is fixedly connected to the upper surface of the testing platform; The electric actuator is fixedly installed on the top crossbeam of the support frame. The mounting bracket is fixedly connected to the end of the piston rod of the electric push rod; The adjusting roller is rotatably mounted inside the U-shaped opening of the mounting frame; The adjusting roller axes of the two sets of clamping units are parallel to each other, and the roller surfaces are configured to make elastic contact with the carbon-coated foil surface.

[0007] In a preferred embodiment of the carbon foil conductivity testing device of this utility model, the testing structure includes: The lead screw is rotatably mounted inside the fixed cylinder. The first motor is fixed to the top of the fixed cylinder, and its output shaft is coaxially connected to the lead screw.

[0008] In a preferred embodiment of the carbon foil conductivity testing device of this utility model, the groove is a through hole extending along the axial direction of the fixed cylinder; The threaded block is provided with a radially protruding connecting arm, which passes through a groove and is fixedly connected to the mounting plate. The inner wall of the chute is slidably connected to the connecting arm.

[0009] As a preferred embodiment of the carbon foil conductivity testing device of this utility model, the testing device integrates a resistance measurement module and a display screen; One end of the connecting line is connected to the test interface of the testing equipment, and the other end is inserted inside the mounting plate and electrically connected to the testing head.

[0010] In a preferred embodiment of the carbon foil conductivity testing device of this utility model, the unwinding structure includes winding mechanisms symmetrically arranged on both sides of the testing platform, and each winding mechanism includes: The mounting bracket is fixed to the edge of the testing table; The drive assembly includes a coaxially connected optical rod, a square rod, and a threaded rod, the optical rod being rotatably supported on a fixed frame; The second motor is fixed to the outside of the mounting frame, and its output shaft is connected to the end of the optical rod for driving. The roller has a square limiting groove in its inner cavity that matches the square rod, and can be slidably sleeved on the square rod.

[0011] As a preferred embodiment of the carbon foil conductivity testing device of this utility model, a square rod is provided between the optical rod and the threaded rod, and the three are arranged coaxially. A limiting block is provided at the connection between the square rod and the smooth rod.

[0012] In a preferred embodiment of the carbon foil conductivity testing device of this utility model, the axial displacement of the roller is adjusted by the screwing position of the threaded sleeve on the threaded rod.

[0013] In a preferred embodiment of the carbon foil conductivity testing device of this utility model, the supporting structure further includes: Several legs, four in number, are vertically fixed to the bottom of the four corners of the testing table.

[0014] In a preferred embodiment of the carbon foil conductivity testing device of this utility model, the pressure table is horizontally fixed to the top surface of the testing table and located between the testing structure and the take-up and put-down structure.

[0015] The beneficial effects of this utility model are: 1. Through the set detection structure, the detection head is precisely raised and lowered by the first motor driven by the lead screw, which ensures stable contact between the detection head and the carbon-coated foil, guarantees the reliability of electrical signal injection, and simultaneously collects voltage and current data and performs calculations based on Ohm's law, etc., to quickly obtain conductivity performance indicators. It can also automatically compare with the qualified standard to complete the judgment. At the same time, the data is displayed intuitively on the display screen and a test report containing parameters and uniformity is generated. The overall process has a high degree of automation, combining detection efficiency and accuracy, and can also provide a comprehensive and detailed basis for the quality analysis of carbon-coated foil. 2. Through the set retraction and pressing structure, the electric push rod drives the adjusting roller to press down, which can ensure that the carbon-coated foil is in close contact with the surface of the pressure table, avoiding the impact of wrinkles on the detection accuracy. At the same time, the second motor drives the roller to rotate slowly to realize the continuous conveying of the carbon-coated foil. The detection can be completed during its movement. Combined with the synchronous operation of the detection head, it can realize dynamic and continuous detection of carbon-coated foil, and ensure the stability and efficiency of the detection process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 A schematic diagram of the overall structure of the carbon foil conductivity testing device provided by this utility model; Figure 2 A schematic diagram of the detection structure of the carbon foil conductivity testing device provided by this utility model; Figure 3A schematic diagram of the take-up and put-down structure of the carbon foil conductivity testing device provided by this utility model; Figure 4 A schematic diagram of a square rod for the carbon foil conductivity testing device provided by this utility model; Figure 5 A schematic diagram of the roller in the carbon foil conductivity testing device provided by this utility model; Figure 6 This is a schematic diagram of the pressure structure of the carbon foil conductivity testing device provided by this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Support structure; 11. Testing table; 12. Support leg; 13. Pressing table; 2. Testing structure; 21. Testing equipment; 22. Connecting line; 23. Fixed cylinder; 24. First motor; 25. Lead screw; 26. Threaded block; 27. Mounting plate; 28. Testing head; 29. ​​Slide groove; 3. Retraction and unfolding structure; 31. Fixed frame; 32. Smooth rod; 33. Square rod; 34. Threaded rod; 35. Second motor; 36. Limiting block; 37. Threaded sleeve; 38. Roller; 4. Pressing structure; 41. Support frame; 42. Electric push rod; 43. Mounting frame; 44. Adjusting roller. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0019] Refer to attached figure Figure 1 - Appendix Figure 6 This utility model provides a device for testing the conductivity of carbon-coated foil, including a support structure 1, a testing platform 11, and several legs 12, four in number, which are vertically fixed to the bottom of the four corners of the testing platform 11. A pressure platform 13 is horizontally fixed to the top surface of the testing platform 11 and located between the testing structure 2 and the retracting structure 3.

[0020] The detection structure 2 includes a detection device 21 fixed on the detection table 11 and a fixed cylinder 23. The fixed cylinder 23 is provided with a lead screw 25. One end of the lead screw 25 is driven by a first motor 24. A threaded block 26 that can move axially along the fixed cylinder 23 is threadedly connected to the lead screw 25. The threaded block 26 is connected to a detection head 28 through a mounting plate 27. The detection head 28 is electrically connected to the detection device 21 through a connecting line 22. The lower end face of the detection head 28 is configured to contact the surface of the carbon-coated foil to be detected. The guide assembly includes a slide groove 29 provided on the fixed cylinder 23. The threaded block 26 forms a sliding fit with the slide groove 29 through a lateral extension.

[0021] In the detection structure 2, the lead screw 25 is rotatably mounted inside the fixed cylinder 23. The first motor 24 is fixed to the top of the fixed cylinder 23, and its output shaft is coaxially connected to the lead screw 25. The fixed cylinder 23 is hollow and closed at both ends. The slide groove 29 is a through hole extending axially along the fixed cylinder 23. The slide groove 29 is a rectangular through hole. The threaded block 26 has a radially protruding connecting arm. The connecting arm passes through the slide groove 29 and is fixedly connected to the mounting plate 27. The inner wall of the slide groove 29 is slidably connected to the connecting arm. The detection device 21 integrates a resistance measurement module and a display screen. One end of the connecting wire 22 is connected to the test interface of the detection device 21, and the other end passes through the mounting plate 27 and is electrically connected to the detection head 28. The testing device 21 is commonly an electrode resistance meter, which typically includes a measurement circuit, a signal processing module, a control unit, and a data storage and display unit. The measurement circuit is used to collect the resistance signal of the carbon-coated foil. The signal processing module amplifies and filters the collected signal to improve the signal quality. The control unit coordinates the work of each component and controls the measurement process. The data storage and display unit is used to store the measurement data and present the test results intuitively, thereby accurately detecting the conductivity of the carbon-coated foil. This is an existing technology.

[0022] The detection head 28 adopts a four-probe structure, which includes two current injection electrodes and two voltage detection electrodes. A DC current I is applied through a constant current source, and the voltage drop ΔU is collected synchronously. The conductivity (k is the probe coefficient) is calculated according to the formula σ=k·(I / ΔU). The detection device 21 has a built-in signal processing module and displacement sensor, which synchronously records current and voltage data at a sampling frequency of 100 times per second, and compensates for the influence of ambient temperature difference through a temperature sensor.

[0023] The retraction structure 3 and the pressing structure 4 are respectively installed on the testing table 11 for tension control and positioning of the carbon foil.

[0024] The winding structure 3 includes winding mechanisms symmetrically arranged on both sides of the testing table 11. Each winding mechanism includes a fixed frame 31 fixed to the edge of the testing table 11, a drive assembly including a smooth rod 32, a square rod 33 and a threaded rod 34 coaxially connected, the smooth rod 32 being rotatably supported on the fixed frame 31, a second motor 35 fixed to the outside of the fixed frame 31, its output shaft being drivenly connected to the end of the smooth rod 32, and a roller 38 with a square limiting groove in its inner cavity matching the square rod 33, which is slidably sleeved on the square rod 33. A square rod 33 is provided between the smooth rod 32 and the threaded rod 34. The three are arranged coaxially. A limiting block 36 is provided at the connection between the square rod 33 and the smooth rod 32. The axial displacement of the roller 38 is adjusted by the screwing position of the threaded sleeve 37 on the threaded rod 34.

[0025] The pressing structure 4 includes two sets of pressing units symmetrically arranged on the testing table 11. Each pressing unit includes a vertically arranged support frame 41, the bottom of which is fixedly connected to the upper surface of the testing table 11; an electric push rod 42, which is fixedly installed on the top crossbeam of the support frame 41; a mounting frame 43, which is fixedly connected to the piston rod end of the electric push rod 42; and an adjusting roller 44, which is rotatably installed in the U-shaped opening of the mounting frame 43. The axes of the adjusting rollers 44 of the two pressing units are parallel to each other, and the roller surface is configured to elastically contact the carbon-coated foil surface.

[0026] During use, the carbon-coated foil is placed on top of the pressure table 13, and the first motor 24 is started. The motor shaft of the first motor 24 drives the lead screw 25 to rotate. The lead screw 25 drives the mounting plate 27 to descend through the threaded block 26, so that the detection head 28 contacts the carbon-coated foil. A specific electrical signal is injected through the detection head 28, and then the synchronously collected voltage, current and other data are transmitted to the detection device 21. The electronic components inside the detection device 21 calculate the conductivity performance index using Ohm's law and other methods, compare it with the pass standard to determine whether it is qualified, and display the measured data on the display screen to generate a test report containing parameters and uniformity.

[0027] When carbon foil needs to be rolled onto roller 38, first remove the threaded sleeve 37, then insert roller 38 into square rod 33, and limit roller 38 by limiting block 36. Then, thread sleeve 37 is threaded onto threaded rod 34, limiting roller 38 by thread sleeve 37, thus keeping roller 38 stable. Connect the free end of carbon foil to another roller 38, start electric push rod 42, and drive mounting frame 43 to descend through the telescopic end of electric push rod 42, causing adjusting roller 44 to descend. Adjusting roller 44 presses carbon foil, so that carbon foil and the surface of pressure table 13 are pressed together. For bonding, the second motor 35 is started. The motor shaft of the second motor 35 drives the guide rod 32 to rotate. The guide rod 32 drives the roller 38 to rotate slowly through the square rod 33. The roller 38 winds up the carbon-coated foil. During the movement of the carbon-coated foil, after the detection head 28 descends, the electric push rod 42 applies a constant pressure of 5N to make the detection head stick tightly to the carbon-coated foil. The second motor 35 controls the carbon-coated foil to move at a speed of 2cm / s. The detection device 21 triggers the displacement sensor to synchronously collect the position coordinates and electrical signals. The detection device 21 automatically records the conductivity data at intervals of 1 cm and generates a conductivity uniformity distribution map along the length direction.

[0028] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for testing the conductivity of carbon-coated foil, characterized in that: Support structure (1), including testing table (11); The detection structure (2) includes a detection device (21) fixed on the detection table (11) and a fixed cylinder (23). The fixed cylinder (23) is provided with a lead screw (25). One end of the lead screw (25) is driven by a first motor (24). A threaded block (26) that can move along the axial direction of the fixed cylinder (23) is threaded on the lead screw (25). The threaded block (26) is connected to the detection head (28) through a mounting plate (27). The detection head (28) is electrically connected to the detection device (21) through a connecting line (22). The lower end face of the detection head (28) is configured to contact the surface of the carbon-coated foil to be detected. The guide assembly includes a groove (29) provided on the fixed cylinder (23), and the threaded block (26) is in sliding fit with the groove (29) through a lateral extension; The retraction structure (3) and the pressing structure (4) are respectively installed on the testing table (11) for tension control and positioning of the carbon foil.

2. The carbon foil conductivity testing device according to claim 1, characterized in that: The pressing structure (4) includes two sets of pressing units symmetrically arranged on the testing table (11), each set of pressing units including: A vertically arranged support frame (41) is fixedly connected at its bottom to the upper surface of the testing table (11); An electric push rod (42) is fixedly installed on the top crossbeam of the support frame (41); Mounting bracket (43) is fixedly connected to the piston rod end of electric push rod (42); The adjusting roller (44) is rotatably mounted in the U-shaped opening of the mounting frame (43); The axes of the adjusting rollers (44) of the two sets of clamping units are parallel to each other, and the roller surfaces are configured to make elastic contact with the carbon-coated foil surface.

3. The carbon foil conductivity testing device according to claim 1, characterized in that: In the detection structure (2): The lead screw (25) is rotatably mounted in the inner cavity of the fixed cylinder (23); The first motor (24) is fixed to the top of the fixed cylinder (23), and its output shaft is coaxially connected to the lead screw (25).

4. The carbon foil conductivity testing device according to claim 3, characterized in that: The groove (29) is a through hole extending axially along the fixed cylinder (23); The threaded block (26) is provided with a radially protruding connecting arm, which passes through the slide groove (29) and is fixedly connected to the mounting plate (27); The inner wall of the groove (29) is slidably connected to the connecting arm.

5. The carbon foil conductivity testing device according to claim 3, characterized in that: The detection device (21) integrates a resistance measurement module and a display screen; One end of the connecting line (22) is connected to the test interface of the testing device (21), and the other end is inserted inside the mounting plate (27) and electrically connected to the testing head (28).

6. The device for testing the conductivity of carbon-coated foil according to any one of claims 1-5, characterized in that: The retractable structure (3) includes winding mechanisms symmetrically arranged on both sides of the detection table (11), and each winding mechanism includes: The mounting bracket (31) is fixed to the edge of the testing table (11); The drive assembly includes a light rod (32), a square rod (33), and a threaded rod (34) connected coaxially, wherein the light rod (32) is rotatably supported on a fixed frame (31); The second motor (35) is fixed to the outside of the fixing frame (31), and its output shaft is driven to the end of the light rod (32); The roller (38) has a square limiting groove in its inner cavity that matches the square rod (33), and is slidably sleeved on the square rod (33).

7. The carbon foil conductivity testing device according to claim 6, characterized in that: A square rod (33) is provided between the smooth rod (32) and the threaded rod (34), and the three are arranged coaxially; A limiting block (36) is provided at the connection between the square rod (33) and the smooth rod (32).

8. The carbon foil conductivity testing device according to claim 7, characterized in that: The axial displacement of the roller (38) is adjusted by the screwing position of the threaded sleeve (37) on the threaded rod (34).

9. The carbon foil conductivity testing device according to claim 1, characterized in that: The supporting structure (1) also includes: Several legs (12), the number of which is set to four, are vertically fixed to the bottom of the four corners of the testing table (11).

10. The carbon foil conductivity testing device according to claim 9, characterized in that: The pressure table (13) is horizontally fixed to the top surface of the detection table (11) and located between the detection structure (2) and the take-up and take-down structure (3).

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