Testing tool for testing contact angle of diaphragm

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a testing tool for testing the contact angle of a diaphragm, which comprises a base plate, fixing plates symmetrically arranged at the upper end and the lower end of the base plate, an upper clamping plate hinged between the fixing plates at the upper end of the base plate, and a lower clamping plate hinged between the fixing plates at the lower end of the base plate. The side walls, away from the glass table, of the lower clamping plate and the upper clamping plate are provided with cutting knives through clamping mechanisms, the base plate is provided with a fixing mechanism and a positioning mechanism, and the base plate and the glass table are provided with diaphragms. The diaphragm is cut and fixed through the upper clamping plate and the lower clamping plate and is matched with the glass table, so that the diaphragm is prevented from being curled and wrinkled in the sample preparation process, the test accuracy is improved, the reject ratio after sample preparation is reduced, the sample preparation time is shortened, and the sample preparation efficiency is improved; and the cutting knife can be conveniently and quickly mounted and dismounted through the clamping mechanism, so that the operation is simplified, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a testing fixture for testing the contact angle of a separator. Background Technology

[0002] With technological advancements, lithium-ion batteries have become a lightweight and efficient power source, widely used in automobiles, energy storage, aerospace, and medical devices. The main components of a lithium battery include: a positive electrode, a separator, a negative electrode, an electrolyte, and a battery casing. The separator is a specially molded polymer film with a microporous structure that prevents electrons from passing through, thus isolating the positive and negative electrodes and preventing internal short circuits, ensuring the battery's safety and stability under normal operating conditions. It also possesses good ion permeability, allowing lithium ions or other ions to migrate freely between the positive and negative electrodes, facilitating the battery's charging and discharging process. Among various methods, contact angle measurement is the optimal method for evaluating separator wettability. It not only quantitatively characterizes the separator's wettability through contact angle size but also directly reflects the affinity between the separator and the electrolyte. Furthermore, compared to other complex testing methods that require high-speed cameras or specific equipment, it is relatively simple to operate.

[0003] However, during the sample preparation process, the existing equipment cannot guarantee that the diaphragm will not curl or wrinkle. If a large number of diaphragms curl or wrinkle, it will be detrimental to improving the pass rate after sample preparation, reducing the accuracy of testing, and hindering the improvement of sample preparation efficiency. Furthermore, the cutting blade is prone to damage from repeated use during diaphragm cutting, requiring disassembly, repair, or replacement. The existing equipment cannot quickly replace or repair the cutting blade, making it inconvenient for staff to use.

[0004] Based on this, a testing fixture for testing the contact angle of a diaphragm is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] To address the aforementioned issues, a testing fixture for testing the contact angle of a diaphragm is provided. The fixture, consisting of an upper clamping plate, a lower clamping plate, and a snap-fit ​​mechanism, solves the problems of diaphragm curling, wrinkling, and the difficulty in disassembling the cutting blade.

[0006] To address the problems in the prior art, this utility model provides a testing fixture for testing the contact angle of a diaphragm, comprising a base plate, with fixed plates symmetrically arranged at the upper and lower ends of the base plate, an upper clamping plate hinged between the fixed plates at the upper end of the base plate, and a lower clamping plate hinged between the fixed plates at the lower end of the base plate, a glass stage provided on one side of the base plate, and a cutting blade mounted on the side wall of the lower and upper clamping plates away from the glass stage via a snap-fit ​​mechanism, a fixing mechanism and a positioning mechanism provided on the base plate, and a diaphragm provided on the base plate and the glass stage.

[0007] Preferably, the height of the upper clamping plate after it is tightly closed with the substrate is lower than or equal to the height of the glass stage.

[0008] Preferably, the locking mechanism includes a locking block, a guide rail, a connecting rope, a second return spring, a locking groove, a sliding groove, and a fixing block. The cutting blade is provided with a locking groove, and the side walls of the lower clamping plate and the upper clamping plate are both provided with guide rails. The cutting blade slides in cooperation with the inner wall of the guide rail. The guide rail is provided with a sliding groove that coincides with the locking groove. The inner walls of the lower clamping plate and the upper clamping plate are both slidably provided with locking blocks. One end of the locking block near the lower clamping plate or the upper clamping plate is connected to the connecting rope. The other end of the connecting rope passes through the side wall of the fixing block and through the top wall of the lower clamping plate or the upper clamping plate. The inner walls of the lower clamping plate and the upper clamping plate are both fixedly provided with fixing blocks. One end of the second return spring is connected to the side wall of the fixing block, and the other end of the second return spring is connected to the inner wall of the lower clamping plate or the upper clamping plate.

[0009] Preferably, the fixing mechanism includes a mounting block, a mounting plate, a limiting plate, and a first return spring. The mounting block is provided on the side wall of the base plate, and the mounting plate is provided on the side of the mounting block near the lower clamping plate. The lower end of the mounting block is rotatably provided with a limiting plate. The two ends of the first return spring are respectively connected to the bottom wall of the mounting plate and the side wall of the limiting plate. The limiting plate is clamped and cooperates with the lower clamping plate. The base plate is provided with a positioning mechanism for fixing the upper clamping plate.

[0010] Preferably, the positioning mechanism includes positioning posts and positioning holes. The positioning holes are symmetrically arranged on the upper clamping plate, and the positioning posts are symmetrically arranged on the side of the base plate near the upper clamping plate. The positioning posts are slidably engaged with the positioning holes, and the positioning posts are provided with rubber pads.

[0011] Preferably, the substrate is symmetrically provided with table mats that cooperate with the cutting blade.

[0012] The advantages of this utility model compared to the prior art are:

[0013] 1. This utility model uses upper and lower clamping plates to cut and fix the diaphragm, and cooperates with the glass stage to ensure that the diaphragm will not curl or wrinkle during the sample preparation process, thereby improving the accuracy of testing, reducing the failure rate after sample preparation, shortening the sample preparation time, and improving the sample preparation efficiency.

[0014] 2. This utility model is equipped with a snap-fit ​​mechanism to facilitate quick installation and disassembly of the cutting blade, simplifying operation and improving work efficiency. Attached Figure Description

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a test fixture for testing the contact angle of a diaphragm. Figure 1 .

[0016] Figure 2 A schematic diagram of the three-dimensional structure of a test fixture for testing the contact angle of a diaphragm. Figure 2 .

[0017] Figure 3 This is a three-dimensional structural diagram of the fixing mechanism of a test fixture for testing the contact angle of a diaphragm.

[0018] Figure 4 This is a schematic diagram of the internal structure of the clamping mechanism of a test fixture for testing the contact angle of a diaphragm.

[0019] The following numbers are labeled in the diagram: 101, glass stage; 102, substrate; 103, diaphragm; 104, lower clamping plate; 105, upper clamping plate; 106, fixing plate; 107, cutting blade; 108, table mat; 200, fixing mechanism; 201, mounting block; 202, mounting plate; 203, limiting plate; 204, first return spring; 300, snap-fit ​​mechanism; 301, snap-fit ​​block; 302, guide rail; 303, connecting rope; 304, second return spring; 305, slot; 306, slide groove; 307, fixing block; 400, positioning mechanism; 401, positioning post; 402, positioning hole. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-4 A testing fixture for testing the contact angle of a diaphragm includes a substrate 102. Fixing plates 106 are symmetrically arranged at the upper and lower ends of the substrate 102. An upper clamping plate 105 is hinged between the fixing plates 106 at the upper end of the substrate 102, and a lower clamping plate 104 is hinged between the fixing plates 106 at the lower end of the substrate 102. A glass stage 101 is provided on one side of the substrate 102. A cutting blade 107 is mounted on the sidewall of the lower clamping plate 104 and the upper clamping plate 105 away from the glass stage 101 via a snap-fit ​​mechanism 300. A fixing mechanism 200 and a positioning mechanism 400 are provided on the substrate 102. A diaphragm 103 is provided on the substrate 102 and the glass stage 101.

[0022] During sample preparation, the diaphragm 103 is fixed between the lower clamping plate 104 and the substrate 102. After the two plates are tightened, the excess diaphragm 103 is automatically cut off. At the same time, one end of the diaphragm 103 is fixed. The other end of the diaphragm 103 is wrapped around the glass stage 101, and the diaphragm 103 is flipped so that it is pressed against the glass stage 101 and laid flat on the substrate 102. Then the upper clamping plate 105 is pressed down, and the excess diaphragm 103 is cut off. The sample preparation is completed. This can ensure that the diaphragm 103 will not curl or wrinkle during the sample preparation process, improve the test accuracy, reduce the failure rate after sample preparation, shorten the sample preparation time, and improve the sample preparation efficiency.

[0023] Reference Figures 1-2 The height of the upper clamping plate 105 after it is tightly closed with the base plate 102 is lower than or equal to the height of the glass stage 101.

[0024] The height of the upper clamping plate 105 after it is clamped to the substrate 102 is lower than or equal to the height of the glass stage 101 in order to avoid the test sample being blocked.

[0025] Reference Figure 4 The locking mechanism 300 includes a locking block 301, a guide rail 302, a connecting rope 303, a second return spring 304, a locking groove 305, a sliding groove 306, and a fixing block 307. The cutting blade 107 has a locking groove 305. Guide rails 302 are provided on the side walls of both the lower clamping plate 104 and the upper clamping plate 105. The cutting blade 107 slides against the inner wall of the guide rail 302. The guide rail 302 has a sliding groove 306 that coincides with the locking groove 305. The inner walls of both the lower clamping plate 104 and the upper clamping plate 105... A sliding locking block 301 is provided. One end of the locking block 301 near the lower clamping plate 104 or the upper clamping plate 105 is connected to a connecting rope 303. The other end of the connecting rope 303 passes through the side wall of the fixing block 307 and through the top wall of the lower clamping plate 104 or the upper clamping plate 105. Fixing blocks 307 are fixedly provided on the inner walls of both the lower clamping plate 104 and the upper clamping plate 105. One end of the second return spring 304 is connected to the side wall of the fixing block 307, and the other end of the second return spring 304 is connected to the inner wall of the lower clamping plate 104 or the upper clamping plate 105.

[0026] Pull the connecting rope 303 to align the cutting blade 107 with the guide rail 302 and slide it. At this time, the locking block 301 is forced to retract the second return spring 304 into the lower clamping plate 104 or the upper clamping plate 105. When the locking block 301 encounters the slot 305, the second return spring 304 drives the locking block 301 to reset and engage the slot 305 and the slide groove 306. This allows for quick installation of the cutting blade 107. When the cutting blade 107 needs to be disassembled, repaired, or replaced, simply pull the connecting rope 303 to retract the locking block 301 into the lower clamping plate 104 or the upper clamping plate 105, and slide the cutting blade 107 to complete the disassembly.

[0027] Reference Figure 3 The fixing mechanism 200 includes a mounting block 201, a mounting plate 202, a limiting plate 203, and a first return spring 204. The mounting block 201 is provided on the side wall of the base plate 102. The mounting plate 202 is provided on the side of the mounting block 201 near the lower clamping plate 104. The limiting plate 203 is rotatably provided at the lower end of the mounting block 201. The two ends of the first return spring 204 are respectively connected to the bottom wall of the mounting plate 202 and the side wall of the limiting plate 203. The limiting plate 203 is clamped and cooperated with the lower clamping plate 104. The base plate 102 is provided with a positioning mechanism 400 for fixing the upper clamping plate 105.

[0028] Pull the limiting plate 203 and rotate the lower clamping plate 104 until the lower clamping plate 104 is parallel to the base plate 102. Then release the limiting plate 203 to complete the fixed limiting of the lower clamping plate 104, which is convenient for operation.

[0029] Reference Figures 1-2 The positioning mechanism 400 includes a positioning post 401 and a positioning hole 402. The positioning hole 402 is symmetrically arranged on the upper clamping plate 105. The positioning post 401 is symmetrically arranged on the side of the base plate 102 near the upper clamping plate 105. The positioning post 401 is slidably engaged with the positioning hole 402. A rubber pad is provided on the positioning post 401.

[0030] Rotating the upper clamping plate 105 allows it to slide with the positioning pin 401 and the positioning hole 402, keeping the upper clamping plate 105 and the base plate 102 in a horizontal position, making the operation simple.

[0031] Reference Figure 1 The substrate 102 is symmetrically provided with table mats 108 that cooperate with the cutting blade 107.

[0032] To avoid unnecessary damage to the substrate 102 caused by the cutting blade 107.

[0033] Working principle: Pulling the connecting rope 303 aligns the cutting blade 107 with the guide rail 302 and slides it. At this time, the locking block 301 is forced to retract the second return spring 304 into the lower clamping plate 104 or the upper clamping plate 105. When the locking block 301 encounters the slot 305, the second return spring 304 drives the locking block 301 to reset and engage the slot 305 and the slide groove 306. This allows for quick installation of the cutting blade 107. When the cutting blade 107 needs to be disassembled, repaired, or replaced, simply pull the connecting rope 303 to retract the locking block 301 into the lower clamping plate 104 or the upper clamping plate 105, and slide the cutting blade 107 to complete the disassembly. During sample preparation, the diaphragm 103 is fixed between the lower clamping plate 104 and the substrate 102. Pulling the limiting plate 203 and rotating the lower clamping plate 104 will move the lower clamping plate 107 into the substrate 102. Rotating the clamping plate 104 until it is parallel to the substrate 102 and releasing the limiting plate 203 completes the fixing and limiting of the lower clamping plate 104. After the two plates are tightened, the excess diaphragm 103 is automatically cut off. At the same time, one end of the diaphragm 103 is fixed. The other end of the diaphragm 103 is wrapped around the glass stage 101, and the diaphragm 103 is flipped so that it is close to the glass stage 101 and laid flat on the substrate 102. Rotating the upper clamping plate 105 and sliding it through the positioning post 401 and positioning hole 402 can keep the upper clamping plate 105 and the substrate 102 in a horizontal state. The excess diaphragm 103 is cut off, and the sample preparation is completed. This can ensure that the diaphragm 103 will not curl or wrinkle during the sample preparation process, improve the test accuracy, reduce the failure rate after sample preparation, shorten the sample preparation time, and improve the sample preparation efficiency.

[0034] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A testing fixture for testing the contact angle of a diaphragm, characterized in that, The system includes a substrate (102), with fixing plates (106) symmetrically arranged at the upper and lower ends of the substrate (102). An upper clamping plate (105) is hinged between the fixing plates (106) at the upper end of the substrate (102), and a lower clamping plate (104) is hinged between the fixing plates (106) at the lower end of the substrate (102). A glass stage (101) is provided on one side of the substrate (102). A cutting blade (107) is installed on the side wall of the lower clamping plate (104) and the upper clamping plate (105) away from the glass stage (101) through a snap-fit ​​mechanism (300). A fixing mechanism (200) and a positioning mechanism (400) are provided on the substrate (102). A diaphragm (103) is provided on the substrate (102) and the glass stage (101).

2. The testing fixture for testing the contact angle of a diaphragm according to claim 1, characterized in that, The height of the upper clamping plate (105) after it is tightly closed with the base plate (102) is lower than or equal to the height of the glass stage (101).

3. The testing fixture for testing the contact angle of a diaphragm according to claim 1, characterized in that, The locking mechanism (300) includes a locking block (301), a guide rail (302), a connecting rope (303), a second return spring (304), a locking groove (305), a sliding groove (306), and a fixing block (307). The cutting blade (107) is provided with a locking groove (305). The lower clamping plate (104) and the upper clamping plate (105) are both provided with guide rails (302) on their side walls. The cutting blade (107) slides in cooperation with the inner wall of the guide rail (302). The guide rail (302) is provided with a sliding groove (306) that coincides with the locking groove (305). The lower clamping plate (104) and the upper clamping plate (105) The inner walls are all slidably provided with locking blocks (301). One end of the locking block (301) near the lower clamping plate (104) or the upper clamping plate (105) is connected to a connecting rope (303). The other end of the connecting rope (303) passes through the side wall of the fixing block (307) and through the top wall of the lower clamping plate (104) or the upper clamping plate (105). The inner walls of the lower clamping plate (104) and the upper clamping plate (105) are both fixedly provided with fixing blocks (307). One end of the second return spring (304) is connected to the side wall of the fixing block (307), and the other end of the second return spring (304) is connected to the inner wall of the lower clamping plate (104) or the upper clamping plate (105).

4. The testing fixture for testing the contact angle of a diaphragm according to claim 1, characterized in that, The fixing mechanism (200) includes a mounting block (201), a mounting plate (202), a limiting plate (203), and a first return spring (204). The mounting block (201) is provided on the side wall of the base plate (102). The mounting plate (202) is provided on the side of the mounting block (201) near the lower clamping plate (104). The limiting plate (203) is rotatably provided at the lower end of the mounting block (201). The two ends of the first return spring (204) are respectively connected to the bottom wall of the mounting plate (202) and the side wall of the limiting plate (203). The limiting plate (203) is clamped and cooperated with the lower clamping plate (104). The base plate (102) is provided with a positioning mechanism (400) for fixing the upper clamping plate (105).

5. The testing fixture for testing the contact angle of a diaphragm according to claim 4, characterized in that, The positioning mechanism (400) includes a positioning post (401) and a positioning hole (402). The positioning hole (402) is symmetrically arranged on the upper clamping plate (105). The positioning post (401) is symmetrically arranged on the side of the base plate (102) near the upper clamping plate (105). The positioning post (401) slides with the positioning hole (402). A rubber pad is provided on the positioning post (401).

6. The testing fixture for testing the contact angle of a diaphragm according to claim 1, characterized in that, The substrate (102) is symmetrically provided with table mats (108) that cooperate with the cutting blade (107).

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