Flexible testing device
By designing a mechanically linked flexibility testing device, continuous adjustment and quantitative evaluation of the bending radius were achieved, solving the efficiency problem of frequent replacement of the cylindrical shaft in traditional methods, simplifying the testing steps and improving efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional flexibility testing methods require frequent changes of cylindrical shafts of different diameters, which is cumbersome and inefficient.
Design a flexibility testing device that achieves continuous adjustment of the bending radius through a mechanical linkage system. The lifting direct drive mechanism drives the electrode gathering mechanism to clamp the sheet to be tested from the outside, continuously compressing its spacing, forcing the curvature radius of the bending part to decrease dynamically, and the displacement is recorded in real time by the distance measuring mechanism as a quantitative evaluation index.
It enables quantitative evaluation of flexibility, simplifies testing procedures, significantly improves testing efficiency, avoids manual replacement, and enhances testing accuracy and efficiency.
Smart Images
Figure CN224262977U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of flexibility testing, and in particular to a flexibility testing device. Background Technology
[0002] The flexibility test of battery electrodes is a test to evaluate the ability of the positive and negative electrodes to resist fracture and retain coating under mechanical stress such as bending and folding, so as to ensure their structural integrity during manufacturing and use.
[0003] The commonly used testing method is the bending radius method. The specific steps are as follows: bend the electrode sheet 180° around the axis of a cylinder with a specific diameter (such as 1mm or 2mm) and observe whether the coating at the bending point of the electrode sheet cracks or peels off.
[0004] Generally, by using multiple cylindrical axes with diameters ranging from large to small for step-by-step testing, the minimum bendable radius can be determined (the radius of the cylindrical axis corresponding to the point where the coating at the bend of the electrode appears to crack or peel off is the minimum bendable radius). The size of the minimum bendable radius can be used as a quantitative indicator to evaluate the flexibility of the electrode.
[0005] However, the above method requires frequent replacement of cylindrical shafts with different diameters, which is cumbersome and inefficient.
[0006] Therefore, this utility model is dedicated to developing a flexibility testing device that can not only achieve quantitative evaluation of flexibility, but also simplify testing steps and improve testing efficiency. Utility Model Content
[0007] This invention provides a flexibility testing device, which aims to not only achieve quantitative evaluation of flexibility, but also simplify testing steps and improve testing efficiency.
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] A flexibility testing device for performing flexibility tests on sheet materials.
[0010] The sheet to be tested is U-shaped, including two vertically arranged opposite parts and a bent part connecting the lower ends of the two vertical parts;
[0011] The flexibility testing device includes:
[0012] An electrode fixing mechanism is used to clamp and fix the upper parts of the two vertical parts;
[0013] An electrode gathering mechanism is located below the electrode fixing mechanism and is used to clamp the sheet to be tested from the outside of the two vertical parts to shorten the interval between the two vertical parts.
[0014] A lifting direct drive mechanism, the drive end of which is connected to the electrode gathering mechanism, is used to drive the electrode gathering mechanism to move downward, so that the radius of curvature of the bent part gradually decreases;
[0015] A ranging mechanism is used to acquire and record the downward displacement of the electrode gathering mechanism.
[0016] Optionally, the flexibility testing device further includes a microscope located directly below the electrode gathering mechanism, the microscope being used to acquire an image of the bent portion from above.
[0017] Optionally, the electrode fixing mechanism includes:
[0018] Gripper direct drive assembly;
[0019] Two linkage gripper assemblies are arranged on both sides of the gripper direct drive assembly and are both connected to the drive end of the gripper direct drive assembly.
[0020] The two connecting rod gripper assemblies are driven by the gripper direct drive assembly to move closer to each other to clamp the two vertical parts, or to separate from each other to release the two vertical parts.
[0021] Optionally, the gripper direct drive assembly includes:
[0022] Gear base plate;
[0023] A telescopic rack, the telescopic rack being located above the gear base plate;
[0024] A gripper direct drive mechanism is mounted and fixed on the gear base plate, and the drive end of the gripper direct drive mechanism is connected to the telescopic rack, which is used to drive the telescopic rack to perform linear reciprocating motion in the horizontal direction.
[0025] Optionally, the link gripper assembly includes:
[0026] The transmission gear includes a gear body rotatably mounted on the gear base plate and meshing with the transmission gear, and an extension portion protruding from the edge of the gear body in a direction away from the telescopic rack.
[0027] An auxiliary connecting rod is located on the side of the transmission gear closer to the sheet to be tested, and one end of the auxiliary connecting rod is rotatably connected to the gear base plate;
[0028] An obtuse-angled clamp, one end of which is rotatably connected to the outer extension, and the corner of the obtuse-angled clamp is rotatably connected to the other end of the auxiliary connecting rod;
[0029] When the telescopic rack is driven by the gripper direct drive mechanism to approach the sheet to be tested, the two obtuse-angled clamps approach each other and clamp the sheet to be tested.
[0030] When the telescopic rack is driven away from the sheet to be tested by the gripper direct drive mechanism, the two obtuse-angled clamps move away from each other and release the sheet to be tested.
[0031] Optionally, the electrode gathering mechanism includes a horizontal guide rail and two transverse moving components slidably mounted on the horizontal guide rail;
[0032] The transverse component includes a transverse slider that slides laterally along the horizontal guide rail, and a clamping roller that is rotatably mounted on the transverse slider and pushes against the sheet to be tested from the outside of the sheet to be tested.
[0033] Optionally, the transverse slider is an electric slider;
[0034] Alternatively, a tension spring is provided between the two transverse sliders to drive the two transverse sliders closer to each other.
[0035] Optionally, the axial length of the clamping roller is greater than or equal to the width of the sheet to be tested.
[0036] Optionally, the lifting direct drive mechanism is a motor lead screw linear module, and the ranging mechanism is electrically connected to the motor lead screw linear module to obtain the motor rotation parameters of the motor lead screw linear module in order to calculate the downward displacement.
[0037] Alternatively, the ranging mechanism may be a ranging sensor installed and fixed above or below the electrode gathering mechanism.
[0038] Optional, also includes:
[0039] Fixed base;
[0040] A fixed upright plate is provided, the lower end of which is fixed to the fixed base, the electrode fixing mechanism is fixed to the upper part of the fixed upright plate, and the lifting direct drive mechanism is installed at the lower part of the fixed upright plate.
[0041] The electrode collection mechanism is slidably connected to the fixed plate.
[0042] Compared with the prior art, the flexibility testing device provided by this utility model realizes continuous adjustment of the bending radius through a mechanical linkage system, which effectively solves the efficiency problem of frequent replacement of the cylindrical shaft in the traditional method.
[0043] Specifically, when the lifting direct drive mechanism drives the electrode gathering mechanism to move downward, the electrode gathering mechanism clamps the two vertical parts of the sheet to be tested from the outside and continuously compresses their distance, forcing the radius of curvature of the bending part to dynamically decrease as the downward distance increases, forming a continuous variable diameter bending stress application process.
[0044] During this process, the ranging mechanism records the downward displacement of the electrode gathering mechanism in real time. Generally, the downward displacement of the electrode gathering mechanism can be used as a quantitative evaluation index of the flexibility of the sheet under test.
[0045] If necessary, the mathematical relationship between the geometric deformation and displacement of the bending part can be combined to convert the downward displacement into the equivalent minimum bending radius, and then the equivalent minimum bending radius can be used as a quantitative evaluation index of flexibility.
[0046] Compared to the traditional discrete testing method that involves replacing cylindrical shafts in stages, this device completes the full-range testing with a single tooling, avoiding manual replacement steps and significantly improving testing efficiency.
[0047] Therefore, the flexibility testing device provided by this utility model can not only realize the quantitative evaluation of flexibility, but also simplify the testing steps and improve the testing efficiency. Attached Figure Description
[0048] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0049] Figure 1 This is a schematic diagram of the structure of a flexibility testing device provided in an embodiment of this application;
[0050] Figure 2 This is a schematic diagram of the electrode fixing mechanism provided in an embodiment of this application.
[0051] Figure label:
[0052] 1. Fixed base;
[0053] 2. Electrode fixing mechanism;
[0054] 21. Gripper direct drive assembly; 211. Gear base plate; 212. Telescopic rack; 213. Gripper direct drive mechanism;
[0055] 22. Linkage gripper assembly; 221. Transmission gear; 222. Auxiliary link; 223. Obtuse-angle clamp;
[0056] 3. Electrode gathering mechanism; 31. Transverse sliding block; 32. Clamping roller; 33. Horizontal guide rail;
[0057] 4. Lifting direct drive mechanism;
[0058] 5. Microscope;
[0059] 6. Sheet to be tested; 61. Vertical section; 62. Bending section;
[0060] 7. Computer;
[0061] 8. Fix the uprights. Detailed Implementation
[0062] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0063] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0064] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0066] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0067] See Figure 1 This utility model provides a flexibility testing device for testing the flexibility of sheet-shaped objects.
[0068] In this embodiment, the test sheet 6 is taken as the test electrode sheet of a battery. The test sheet 6 is U-shaped and includes two vertically arranged opposite vertical parts 61 and a bent part 62 connecting the lower ends of the two vertical parts 61.
[0069] The flexibility testing device mainly includes a fixed base 1, a fixed upright plate 8, an electrode fixing mechanism 2, an electrode gathering mechanism 3, a lifting direct drive mechanism 4, and a distance measuring mechanism.
[0070] The lower end of the fixed plate 8 is fixed to the fixed base 1, the electrode fixing mechanism 2 is fixed to the upper part of the fixed plate 8, and the lifting direct drive mechanism 4 is installed at the lower part of the fixed plate 8.
[0071] The electrode gathering mechanism 3 is slidably connected to the fixed plate 8 and is located directly below the electrode fixing mechanism 2.
[0072] The electrode fixing mechanism 2 is used to clamp and fix the upper part of the two vertical parts 61; the electrode gathering mechanism 3 is located directly below the electrode fixing mechanism 2 and is used to clamp the sheet to be tested 6 from the outside of the two vertical parts 61 to shorten the interval between the two vertical parts 61; the driving end of the lifting direct drive mechanism 4 is connected to the electrode gathering mechanism 3 and is used to drive the electrode gathering mechanism 3 to move downward, so that the radius of curvature of the bending part 62 gradually decreases.
[0073] The ranging mechanism is used to acquire and record the downward displacement of the electrode gathering mechanism 3.
[0074] Optionally, the lifting direct drive mechanism 4 is a motor lead screw linear module, and the ranging mechanism is electrically connected to the motor lead screw linear module to obtain the motor rotation parameters of the motor lead screw linear module in order to calculate the downward displacement.
[0075] Alternatively, the ranging mechanism may be a ranging sensor installed and fixed above or below the electrode gathering mechanism 3, which detects the downward displacement through photoelectric signal conversion or other means.
[0076] The working process of the above-mentioned flexibility testing device can be broken down into the following steps:
[0077] (1) Electrode fixing
[0078] After the electrode fixing mechanism 2 clamps and fixes both ends of the sheet 6 to be tested, the middle position of the sheet 6 to be tested naturally droops under the action of gravity, thus forming a bent portion 62. At this time, the bent portion 62 is arc-shaped with a large initial radius.
[0079] (2) The gathering mechanism gathers the two vertical parts 61
[0080] The electrode gathering mechanism 3 clamps the middle area of the two vertical sections 61 from the outside:
[0081] (3) Dynamic compression test
[0082] The lifting direct drive mechanism 4 drives the electrode gathering mechanism 3 to move downward. During this process, the radius of the bending part 62 gradually decreases as the electrode gathering mechanism 3 moves downward, and the stress on the bending part 62 gradually increases.
[0083] (4) Quantitative evaluation
[0084] When the radius of the bending part 62 is reduced to a certain value, defects such as cracking or falling off occur in the bending part 62. At this time, the downward displacement of the electrode gathering mechanism 3 can be used as a quantitative evaluation index of the flexibility of the sheet 6 under test. Specifically, the greater the downward displacement of the electrode gathering mechanism 3, the better the flexibility of the sheet 6 under test; conversely, the smaller the downward displacement of the electrode gathering mechanism 3, the worse the flexibility of the sheet 6 under test.
[0085] The aforementioned flexibility testing device achieves continuous adjustment of the bending radius through a mechanical linkage system, effectively solving the efficiency problem of frequent replacement of the cylindrical shaft in traditional methods.
[0086] Specifically, when the lifting direct drive mechanism 4 drives the electrode gathering mechanism 3 to move downward, the electrode gathering mechanism 3 clamps the two vertical parts 61 of the sheet to be tested 6 from the outside and continuously compresses their distance, forcing the radius of curvature of the bent part 62 to dynamically decrease as the downward distance increases, forming a continuous variable diameter bending stress application process.
[0087] During this process, the ranging mechanism records the downward displacement of the electrode gathering mechanism 3 in real time. Generally, the downward displacement of the electrode gathering mechanism 3 can be used as a quantitative evaluation index of the flexibility of the sheet 6 under test.
[0088] If necessary, the mathematical relationship between the geometric deformation and displacement of the bending part 62 can be combined to convert the downward displacement into the equivalent minimum bending radius, and then the equivalent minimum bending radius can be used as a quantitative evaluation index of flexibility.
[0089] Compared to the traditional discrete testing method that involves replacing cylindrical shafts in stages, this device completes the full-range testing with a single tooling, avoiding manual replacement steps and significantly improving testing efficiency.
[0090] Therefore, the flexibility testing device provided by this utility model can not only realize the quantitative evaluation of flexibility, but also simplify the testing steps and improve the testing efficiency.
[0091] The flexibility testing device in this embodiment also includes a microscope 5, which is fixed on the mounting base 1. The electrode fixing mechanism 2, the electrode gathering mechanism 3, and the microscope 5 are arranged sequentially along a straight line. The microscope 5 is used to acquire images of the bent portion 62 of the electrode, thereby improving the accuracy of detecting cracks or powder shedding at the bent portion 62, which is beneficial to improving the accuracy of the test results. Optionally, the electrode fixing mechanism 2, the electrode gathering mechanism 3, and the microscope 5 are arranged sequentially in the vertical direction, and the lens of the microscope 5 faces upward and is used to acquire images of the bent portion 62 of the electrode upward. Based on this, it is difficult for operators to observe the bent portion 62 of the electrode from bottom to top through the microscope 5. Therefore, the microscope 5 in this embodiment is preferably an electron microscope 5. The flexibility testing device also includes a computer 7 electrically connected to the microscope 5. By setting up the computer 7, the operator can intuitively see the image information of the electrode acquired by the microscope 5 on the computer 7, reducing the difficulty of operation for the operator. More specifically, in one embodiment, a controller can be set between the lifting direct drive mechanism 4 and the computer 7. When the computer 7 displays that the bent portion 62 of the electrode sheet has cracked or is shedding powder, the controller promptly controls the lifting direct drive mechanism 4 to stop driving the electrode sheet gathering mechanism 3 to move. By setting the controller, there is no need to manually stop the lifting direct drive mechanism 4, which further improves the accuracy and efficiency of the test. The computer 7 can also record video of the electrode sheet and measure the size of the cracks in the electrode sheet.
[0092] See Figure 2 In this embodiment, the electrode fixing mechanism 2 includes a gripper direct drive assembly 21 and two connecting rod gripper assemblies 22.
[0093] The two connecting rod gripper assemblies 22 are arranged on both sides of the gripper direct drive assembly 21 and are both connected to the drive end of the gripper direct drive assembly 21.
[0094] The two connecting claw assemblies 22 are driven by the claw direct drive assembly 21 to move closer to each other to clamp the two vertical parts 61, or to separate from each other to release the two vertical parts 61.
[0095] Furthermore, the gripper direct drive assembly 21 includes a gear base plate 211, a telescopic rack 212, and a gripper direct drive mechanism 213.
[0096] The telescopic rack 212 is located above the gear base plate 211. The gripper direct drive mechanism 213 is fixedly mounted on the gear base plate 211, and the drive end of the gripper direct drive mechanism 213 is connected to the telescopic rack 212, which is used to drive the telescopic rack 212 to perform linear reciprocating motion in the horizontal direction.
[0097] Accordingly, the connecting rod gripper assembly 22 includes a transmission gear 221, an auxiliary connecting rod 222, and an obtuse-angled clamping piece 223.
[0098] The transmission gear 221 includes a gear body rotatably mounted on the gear base plate 211 and meshing with the transmission gear 221, and an extension portion protruding from the edge of the gear body in a direction away from the telescopic rack 212.
[0099] The auxiliary connecting rod 222 is located on the side of the transmission gear 221 close to the sheet material 6 to be tested, and one end of the auxiliary connecting rod 222 is rotatably connected to the gear base plate 211;
[0100] One end of the obtuse angle clamp 223 is rotatably connected to the extension portion, and the corner position in the middle of the obtuse angle clamp 223 is rotatably connected to the other end of the auxiliary connecting rod 222.
[0101] When the telescopic rack 212 is driven by the gripper direct drive mechanism 213 to approach the sheet 6 to be tested, the two obtuse angle clamps 223 approach each other and clamp the sheet 6 to be tested.
[0102] When the telescopic rack 212 is driven away from the sheet 6 under test by the gripper direct drive mechanism 213, the two obtuse angle clamps 223 move away from each other and release the sheet 6 under test.
[0103] See Figure 1 In this embodiment, the electrode gathering mechanism 3 includes a horizontal guide rail 33 and two transverse moving components slidably mounted on the horizontal guide rail 33;
[0104] The transverse component includes a transverse slider 31 that slides laterally along the horizontal guide rail 33, and a clamping roller 32 that is rotatably mounted on the transverse slider 31 and pushes against the sheet 6 to be tested from the outside of the sheet 6 to be tested.
[0105] Optionally, the transverse slider 31 is an electric slider, which controls the clamping roller 32 to move laterally by means of electricity;
[0106] Alternatively, a tension spring is provided between the two transverse sliders 31 to drive the two transverse sliders 31 closer to each other. Under the elastic force of the tension spring, the two clamping rollers 32 automatically move closer to each other and clamp the electrode sheet.
[0107] Optionally, the clamping roller 32 is a self-rotating structure. When the clamping roller 32 moves downwards while holding the electrode sheet, the friction between the clamping roller 32 and the electrode sheet is rolling friction rather than sliding friction, thus preventing the electrode sheet from being scratched by the clamping roller 32 during the flexibility test. In addition, the axial length of the clamping roller 32 in this design is greater than or equal to the width of the electrode sheet, ensuring that the clamping roller 32 can completely clamp the electrode sheet in the width direction. This makes the force on the bent part 62 of the electrode sheet more uniform when it is squeezed and deformed when the clamping roller 32 moves downwards, improving the accuracy of the electrode sheet flexibility test.
[0108] It should be noted that in this embodiment, all the direct drive mechanisms mentioned can be manually operated. Taking the lifting direct drive mechanism 4 as an example, the lead screw can be manually driven to rotate, causing the lead screw to drive the electrode gathering mechanism 3 to move up and down in the vertical direction. All the direct drive mechanisms mentioned can also be electric automatic direct drive mechanisms, such as the lifting direct drive mechanism 4 being a lead screw linear module with a motor, a synchronous belt linear module with a motor, or a linear motor, etc.
[0109] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.
Claims
1. A flexibility testing device for performing flexibility testing on a sheet material (6) to be tested, characterized in that, The sheet to be tested (6) is U-shaped, including two vertically arranged opposite parts (61) and a bent part (62) connecting the lower ends of the two vertical parts (61). The flexibility testing device includes: Electrode fixing mechanism (2), the electrode fixing mechanism (2) is used to clamp and fix the upper part of the two vertical parts (61); Electrode gathering mechanism (3), which is located below the electrode fixing mechanism (2), is used to clamp the sheet to be tested (6) from the outside of the two vertical parts (61) to shorten the interval between the two vertical parts (61); The lifting direct drive mechanism (4) is connected to the electrode gathering mechanism (3) at its driving end, and is used to drive the electrode gathering mechanism (3) to move downward, so that the radius of curvature of the bending part (62) gradually decreases. A ranging mechanism is used to acquire and record the downward displacement of the electrode gathering mechanism (3).
2. The flexibility testing device as described in claim 1, characterized in that, The flexibility testing device also includes a microscope (5) located directly below the electrode gathering mechanism (3), the microscope (5) being used to obtain an image of the bent portion (62) from above.
3. The flexibility testing device as described in claim 1, characterized in that, The electrode fixing mechanism (2) includes: Gripper direct drive assembly (21); Two linkage gripper assemblies (22) are arranged on both sides of the gripper direct drive assembly (21) and are both connected to the drive end of the gripper direct drive assembly (21). The two connecting claw assemblies (22) are driven by the claw direct drive assembly (21) to move closer to each other to clamp the two vertical parts (61), or to separate from each other to release the two vertical parts (61).
4. The flexibility testing device as described in claim 3, characterized in that, The gripper direct drive assembly (21) includes: Gear base plate (211); Telescopic rack (212), the telescopic rack (212) being located above the gear base plate (211); The gripper direct drive mechanism (213) is fixed on the gear base plate (211), and the drive end of the gripper direct drive mechanism (213) is connected to the telescopic rack (212) to drive the telescopic rack (212) to make linear reciprocating motion in the horizontal direction.
5. The flexibility testing device as described in claim 4, characterized in that, The link gripper assembly (22) includes: The transmission gear (221) includes a gear body rotatably mounted on the gear base plate (211) and meshing with the transmission gear (221), and an extension portion protruding from the edge of the gear body in a direction away from the telescopic rack (212). An auxiliary connecting rod (222) is located on the side of the transmission gear (221) close to the sheet material (6) to be tested, and one end of the auxiliary connecting rod (222) is rotatably connected to the gear base plate (211); An obtuse angle clamp (223) is provided, one end of which is rotatably connected to the extension portion, and the corner of the obtuse angle clamp (223) is rotatably connected to the other end of the auxiliary connecting rod (222). When the telescopic rack (212) is driven by the gripper direct drive mechanism (213) to approach the sheet to be tested (6), the two obtuse angle clamps (223) approach each other and clamp the sheet to be tested (6). When the telescopic rack (212) is driven away from the sheet to be tested (6) by the gripper direct drive mechanism (213), the two obtuse angle clamps (223) move away from each other and release the sheet to be tested (6).
6. The flexibility testing device as described in claim 1, characterized in that, The electrode gathering mechanism (3) includes a horizontal guide rail (33) and two transverse components that are slidably mounted on the horizontal guide rail (33); The transverse component includes a transverse slider (31) that slides laterally along the horizontal guide rail (33) and a clamping roller (32) that is rotatably mounted on the transverse slider (31) and pushes the sheet to be tested (6) against the outside of the sheet to be tested (6).
7. The flexibility testing device as described in claim 6, characterized in that, The transverse slider (31) is an electric slider; Alternatively, a tension spring is provided between the two transverse sliders (31) to drive the two transverse sliders (31) closer to each other.
8. The flexibility testing device as described in claim 7, characterized in that, The axial length of the clamping roller (32) is greater than or equal to the width of the sheet (6) to be tested.
9. The flexibility testing device as described in claim 1, characterized in that, The lifting direct drive mechanism (4) is a motor lead screw linear module. The ranging mechanism is electrically connected to the motor lead screw linear module and is used to obtain the motor rotation parameters of the motor lead screw linear module to calculate the downward displacement. Alternatively, the ranging mechanism may be a ranging sensor installed and fixed above or below the electrode gathering mechanism (3).
10. The flexibility testing device as described in claim 7, characterized in that, Also includes: Fixed base (1); A fixed plate (8) is fixed at its lower end on the fixed base (1), the electrode fixing mechanism (2) is fixed at the upper part of the fixed plate (8), and the lifting direct drive mechanism (4) is installed at the lower part of the fixed plate (8). The electrode gathering mechanism (3) is slidably connected to the fixed plate (8) in the upper and lower parts.