Lithium battery pole piece peel strength testing device
By designing a lithium battery pole peel strength test device composed of dust collector box, test board and tensile test assembly, the problem of dust and debris falling during the test is solved, and the cleaning of the laboratory environment and the safety and accuracy of the test are achieved.
Patent Information
- Application Number
- CN202421739576.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-22
AI Technical Summary
During the peel strength test of lithium battery electrode plates, the positive and negative electrode plates are prone to powder loss and chip loss, resulting in laboratory environmental pollution, damage to the test instrument and health threats for operators.
A lithium battery electrode strip peel strength testing device is designed, including a dust collector, a test plate and a tensile test assembly. The dust collector collects dust and debris through the top opening and suction port. The test plate is removably connected to the dust collector. The tension test assembly is used to apply tension for peeling test.
It effectively prevents the scattering of dust and debris in the laboratory environment, keeps the laboratory clean, avoids potential harm to the test instruments and operators, and improves the accuracy and safety of the test.
Smart Images
Figure CN222979278U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery testing, in particular to a device for testing the peeling strength of lithium battery electrode sheets. Background Art
[0002] A lithium-ion battery is obtained by assembling a naked battery cell by winding or laminating a positive electrode sheet, a negative electrode sheet and a separator, installing it in a housing, and injecting an electrolyte. The positive and negative electrode sheets are obtained by homogenizing and coating active materials, binders and conductive agents. The role of the binder is to bond the active materials, conductive agents and foil together. Testing the peeling force of the electrode sheet is a way to detect the bonding force of the electrode sheet, and the peeling force is an index for testing and evaluating the performance of the binder.
[0003] At present, the commonly used peeling strength testing methods in laboratories mainly include the 180° peeling method and the 90° peeling method, among which the 180° peeling method is widely used. However, during the testing process, especially when using the 180° peeling scheme, powder and chips are likely to appear on the positive and negative electrode sheets. These dusts and chips fall off during the peeling process, which will not only pollute the laboratory environment, but also may damage the testing instruments and even pose a threat to the health of the operators. Summary of the Utility Model
[0004] In view of this, the utility model provides a device for testing the peeling strength of lithium battery electrode sheets to solve the problem of pollution to the experimental environment caused by the falling of dust and chips during the peeling strength testing process.
[0005] The technical solution of the utility model is realized as follows:
[0006] The utility model provides a device for testing the peeling strength of lithium battery electrode sheets, including:
[0007] A dust collection box, which has a receiving space with an open top;
[0008] A test board, which is vertically arranged in the receiving space. The lower end of the test board is detachably connected to the dust collection box, and the upper end of the test board is used for bonding with one end of the battery electrode sheet to be tested;
[0009] A tensile force testing component, which is arranged outside the dust collection box and is used for pulling the end of the battery electrode sheet to be tested away from the test board upward.
[0010] On the basis of the above technical solution, preferably, at least one side of the lower end of the dust collection box facing the test board is provided with a suction port, and a dust suction device is connected to the suction port.
[0011] On the basis of the above technical solution, preferably, a guiding part is fixedly arranged on the inner bottom surface of the accommodating space. The guiding part has a guiding surface inclined towards the suction port. The test plate is vertically arranged at the top end of the guiding part and is detachably and fixedly connected to the guiding part.
[0012] On the basis of the above technical solution, preferably, it further includes a first clamping device and a support frame. The support frame is fixedly arranged on the bottom surface of the dust collection box. The first clamping device is located below the dust collection box and is fixedly connected to the support frame. A through groove vertically penetrating the dust collection box is formed at the top end of the guiding part. The lower end of the test plate passes through the through groove and is fixedly connected to the first clamping device.
[0013] Further, preferably, the first clamping device includes a fixed seat, a first limiting plate, a second limiting plate, a pressing plate and an adjusting screw. The fixed seat is fixedly arranged on the support frame. The first limiting plate and the second limiting plate are arranged in parallel at intervals on the top surface of the fixed seat. The pressing plate is arranged in parallel between the first limiting plate and the second limiting plate. The pressing plate is used to cooperate with the first limiting plate to clamp the test plate. One end of the adjusting screw is rotatably connected to the pressing plate, and the other end passes through the second limiting plate and is threadedly connected thereto. The adjusting screw can adjust the distance between the pressing plate and the first limiting plate.
[0014] Further, preferably, the first clamping device further includes at least two guiding rods. The guiding rods are horizontally located between the first limiting plate and the second limiting plate and movably pass through the pressing plate. Two ends of the guiding rods are respectively and perpendicularly fixedly connected to the first limiting plate and the second limiting plate. The pressing plate can slide horizontally along the guiding rods.
[0015] Still further, preferably, the first clamping device further includes a third limiting plate. The third limiting plate is horizontally located below the pressing plate. Two ends of the third limiting plate are respectively fixedly connected to the first limiting plate and the second limiting plate.
[0016] On the basis of the above technical solution, preferably, the tensile test assembly includes a tensile testing machine and a second clamping device. The tensile testing machine is fixedly arranged outside the dust collection box. The test end of the tensile testing machine is fixedly connected to one end of the battery pole piece to be tested away from the test plate through the second clamping device. The structure of the second clamping device is the same as that of the first clamping device.
[0017] Preferably, the dust suction device includes a dust suction hood, a pipeline, a suction pump and a collection container. The dust suction hood is fixedly connected to the suction port. The inlet of the suction pump is fixedly connected to the dust suction hood through the pipeline. The outlet of the suction pump is connected to the collection container.
[0018] The utility model has the following beneficial effects compared with the prior art:
[0019] (1) The lithium battery electrode stripping strength testing device disclosed by the present utility model, through the setting of the dust collection box, enables the dust and debris generated by the electrode during the stripping test to be centrally collected into the accommodating space, preventing them from scattering in the laboratory environment. This not only keeps the laboratory clean, but also avoids potential damage to other experimental equipment by the dust, and at the same time protects the operators from the health threat of dust inhalation.
[0020] (2) By setting a suction port at the lower end of the dust collection box and connecting a dust suction device, the collection efficiency of dust and debris can be significantly improved. The dust suction device can timely and effectively suck the fine particles and dust generated during the stripping process, preventing them from spreading in the air and further keeping the experimental environment clean.
[0021] (3) By setting the guiding surface to be inclined towards the suction port, the dust and debris can be naturally guided to the suction port by gravity and the guiding surface, ensuring that the dust and debris are more concentratedly processed by the dust suction device, improving the collection efficiency of dust and debris, and reducing the amount of dust remaining in the device.
[0022] (4) Through the setting of the first clamping device and the through groove, after one end of the battery electrode to be tested is pasted on the upper end of the test plate through double-sided tape, the lower end of the test plate is passed through the through groove and clamped and fixed by the first clamping device, and then the other end of the battery electrode to be tested is connected to the tensile force test component. The design of the first clamping device and the through groove ensures the vertical stability and accurate positioning of the test plate during the stripping test, thereby improving the test accuracy. At the same time, when the test is completed, the test plate can be loosened by the first clamping device, facilitating the removal of the test plate from the through groove, making the installation and disassembly of the test plate simpler and more efficient, reducing the workload and operation difficulty of the operator, and improving the overall operation convenience. Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0024] Figure 1 It is a three-dimensional structure schematic diagram of the lithium battery electrode stripping strength testing device disclosed by the present utility model;
[0025] Figure 2 It is a three-dimensional structure schematic diagram of the dust collection box disclosed by the present utility model;
[0026] Figure 3Schematic plan view of the lithium battery electrode stripping strength testing device disclosed by the present utility model;
[0027] Figure 4 is Figure 3 the cross-sectional view taken along the plane at A-A in
[0028] Figure 5 Schematic three-dimensional structure view of the first clamping device disclosed by the present utility model;
[0029] Reference numerals:
[0030] 1. Dust collection box; 11. Accommodating space; 2. Test plate; 3. Tensile test assembly; S. Battery electrode; 12. Suction port; 4. Dust collection device; 13. Guide part; 131. Guide surface; 5. First clamping device; 6. Support frame; 132. Through groove; 51. Fixed seat; 52. First limiting plate; 53. Second limiting plate; 54. Pressing plate; 55. Adjusting screw; 56. Guide rod; 57. Third limiting plate; 31. Tensile testing machine; 32. Second clamping device; 41. Dust collection hood; 42. Pipeline; 43. Suction pump; 44. Collection container. Detailed implementation manners
[0031] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0032] As Figure 1 shown, in combination with Figures 2 - 4 , the present utility model discloses a lithium battery electrode stripping strength testing device, which includes a dust collection box 1, a test plate 2 and a tensile test assembly 3.
[0033] Among them, the dust collection box 1 has an accommodating space 11 with an open top, which provides an environment for testing the stripping strength of the battery electrode S, and at the same time collects the dust and debris generated during the stripping process to prevent pollution of the experimental environment and damage to the testing instruments.
[0034] The test plate 2 is vertically arranged in the accommodating space 11. The lower end of the test plate 2 is detachably connected to the dust collection box 1, which is convenient for taking out the test plate 2 from the dust collection box 1 and cleaning after the test is completed. The upper end of the test plate 2 is used for bonding with one end of the battery electrode S to be tested as a fixed point for the stripping test. The detachable setting of the test plate 2 facilitates the repetition of different experiments and improves the repeatability and reliability of the test.
[0035] The tensile test assembly 3 is arranged outside the dust collection box 1 and is used to pull the end of the battery electrode sheet S to be tested away from the test plate 2 upward to perform a peeling operation. The force applied by the tensile test assembly 3 can be measured by an instrument to determine the peeling strength of the binder.
[0036] In the lithium battery electrode sheet peeling strength test device disclosed by the present utility model, through the setting of the dust collection box 1, during the peeling test, the dust and debris generated by the electrode sheet can be centrally collected in the accommodation space 11, preventing them from scattering in the laboratory environment. This not only keeps the laboratory clean, but also avoids potential damage to other experimental equipment by the dust, and at the same time protects the operator from the health threat of dust inhalation.
[0037] As some preferred embodiments, at least one side of the lower end of the dust collection box 1 facing the test plate 2 is provided with a suction port 12, and a dust suction device 4 is connected to the suction port 12. By providing the suction port 12 at the lower end of the dust collection box 1 and connecting the dust suction device 4, the collection efficiency of dust and debris can be significantly improved. The dust suction device 4 can timely and effectively suck the fine particles and dust generated during the peeling process, preventing them from spreading in the air and further keeping the experimental environment clean.
[0038] On the basis of the above technical solution, a guiding part 13 is fixedly arranged on the inner bottom surface of the accommodation space 11. The guiding part 13 has a guiding surface 131 inclined towards the suction port 12. By setting the guiding surface 131 to be inclined towards the suction port 12, the dust and debris can be naturally guided to the suction port 12 by gravity and the guiding surface 131, ensuring that the dust and debris are more concentratedly processed by the dust suction device 4, improving the collection efficiency of dust and debris, and reducing the amount of dust remaining in the device.
[0039] The test plate 2 is vertically arranged at the top of the guiding part 13 and is detachably and fixedly connected to the guiding part 13. This enables the user to flexibly disassemble and clean the test plate 2 according to different test requirements, adapt to the peeling strength tests of different types of lithium battery electrode sheets S, and improve the application range and use convenience of the device.
[0040] In order to facilitate the detachable connection of the test plate 2 in the accommodation space 11, a first clamping device 5 and a support frame 6 are also provided in this embodiment. Referring to the attached Figure 4 and 5 as shown, the support frame 6 is fixedly arranged on the bottom surface of the dust collection box 1. The first clamping device 5 is located below the dust collection box 1 and is fixedly connected to the support frame 6. The top end of the guiding part 13 has a through groove 132 vertically penetrating the dust collection box 1. The lower end of the test plate 2 passes through the through groove 132 and is fixedly connected to the first clamping device 5.
[0041] With the above technical solution, after one end of the battery electrode sheet S to be measured is pasted on the upper end of the test board 2 through double-sided tape, the lower end of the test board 2 is passed through the through groove 132 and clamped and fixed by the first clamping device 5. Then, the other end of the battery electrode sheet S to be measured is connected to the tensile test assembly 3. The designs of the first clamping device 5 and the through groove 132 ensure the vertical stability and precise positioning of the test board 2 during the peeling test, thereby improving the test accuracy. At the same time, after the test is completed, the test board 2 can be released through the first clamping device 5, which facilitates the removal of the test board 2 from the through groove 132, making the installation and disassembly of the test board 2 simpler and more efficient, reducing the workload and operation difficulty of the operator, and improving the overall operation convenience.
[0042] This embodiment shows a preferred structural form of the first clamping device 5. Specifically, the first clamping device 5 includes a fixed seat 51, a first limiting plate 52, a second limiting plate 53, a pressing plate 54 and an adjusting screw 55. The fixed seat 51 is fixedly arranged on the support frame 6. The first limiting plate 52 and the second limiting plate 53 are arranged in parallel at intervals on the top surface of the fixed seat 51. The pressing plate 54 is arranged in parallel between the first limiting plate 52 and the second limiting plate 53. The pressing plate 54 is used to cooperate with the first limiting plate 52 to clamp the test board 2. One end of the adjusting screw 55 is rotatably connected to the pressing plate 54, and the other end passes through the second limiting plate 53 and is threadedly connected thereto. The adjusting screw 55 can adjust the distance between the pressing plate 54 and the first limiting plate 52.
[0043] With the above technical solution, after the lower end of the test board 2 vertically passes through the through groove 132, the lower end of the test board 2 is located between the first limiting plate 52 and the pressing plate 54. By manually rotating the adjusting screw 55, the adjusting screw 55 translates towards the first limiting plate 52 relative to the second limiting plate 53. During the translation of the adjusting screw 55, the pressing plate 54 is driven to approach the first limiting plate 52, so as to realize the cooperation between the pressing plate 54 and the first limiting plate 52 to clamp the test board 2, ensuring the stability of the test board 2 during the clamping process and the accuracy of the test. After the test is completed, by rotating the adjusting screw 55 in the reverse direction, the distance between the pressing plate 54 and the first limiting plate 52 increases, which facilitates lifting the test board 2 upward to complete the disassembly of the test board 2, facilitating the cleaning of the double-sided tape and the battery electrode sheet S to be measured on the test board 2 and facilitating the next test.
[0044] As some preferred embodiments, the first clamping device 5 further includes at least two guide rods 56. The guide rods 56 are horizontally located between the first limiting plate 52 and the second limiting plate 53 and movably pass through the pressing plate 54. Both ends of the guide rods 56 are perpendicularly and fixedly connected to the first limiting plate 52 and the second limiting plate 53 respectively. The pressing plate 54 can slide horizontally along the guide rods 56.
[0045] Through the design of the guide rod 56, the pressing plate 54 can clamp the test plate 2 more stably, reducing the movement or skew of the test plate 2 caused by unstable clamping, thereby ensuring the stability of the test process and the accuracy of the test results. Through the arrangement of the guide rod 56, the horizontal sliding of the pressing plate 54 becomes smoother and easier to operate, reducing the workload and operation difficulty of the operator when adjusting the clamping position of the test plate 2, and improving the work efficiency.
[0046] Since the test plate 2 passes downward through the through groove 132 of the accommodating space 11 and is placed between the first limiting plate 52 and the pressing plate 54, in order to ensure the displacement amount of the test plate 2 moving downward, the first clamping device 5 of this embodiment further includes a third limiting plate 57. The third limiting plate 57 is horizontally located below the pressing plate 54, and both ends of the third limiting plate 57 are fixedly connected to the first limiting plate 52 and the second limiting plate 53 respectively.
[0047] Adopting the above technical solution, when the lower end of the test plate 2 is inserted between the first limiting plate 52 and the pressing plate 54 and continues to move downward, it can be resisted by the third limiting plate 57. The setting of the third limiting plate 57 ensures that the displacement amount of the test plate 2 in the vertical direction is accurately controlled, making it more intuitive and convenient for the operator to adjust the position of the test plate 2, reducing the repeated tests for position adjustment, and improving the operation efficiency.
[0048] The tensile test assembly 3 of this embodiment includes a tensile testing machine 31 and a second clamping device 32. The tensile testing machine 31 is fixedly arranged outside the dust collection box 1. The test end of the tensile testing machine 31 is fixedly connected to one end of the battery electrode plate S to be tested away from the test plate 2 through the second clamping device 32. The structure of the second clamping device 32 is the same as that of the first clamping device 5.
[0049] Adopting the above technical solution, the second clamping device 32 can firmly fix the battery electrode plate S to be tested, ensuring that the tensile force applied by the tensile testing machine 31 can be accurately transmitted to the electrode plate, preventing the situation of insecure clamping or uneven tensile force transmission during the test process. Since the structure of the second clamping device 32 is the same as that of the first clamping device 5, it has the same accuracy and stability, ensuring that the test plate 2 and the battery electrode plate S to be tested remain well aligned and stable during the whole test process, thereby improving the accuracy and repeatability of the test results.
[0050] It should be noted that the tensile testing machine 31 involved in the above embodiment is a general device in the prior art.
[0051] As some alternative embodiments, the dust suction device 4 includes a dust suction hood 41, a duct 42, a suction pump 43 and a collection container 44. The dust suction hood 41 is fixedly connected to the suction port 12. The inlet of the suction pump 43 is fixedly connected to the dust suction hood 41 through the duct 42, and the outlet of the suction pump 43 is connected to the collection container 44. By providing suction through the suction pump 43, it is ensured that the dust and debris in the dust collection box 1 can be quickly extracted and collected by the collection container 44, reducing the dispersion of dust in the air, reducing the risk of operators inhaling harmful dust, and also facilitating the regular cleaning and disposal by the operators.
[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A lithium battery pole piece peel strength testing device, characterized in that: include: A dust collecting box (1), the dust collecting box (1) having a accommodating space (11) with a top opening; A test plate (2) is vertically arranged in the accommodating space (11), the lower end of the test plate (2) is detachably connected to the dust collecting box (1), and the upper end of the test plate (2) is used to be bonded to one end of the battery electrode (S) to be tested; The tension test assembly (3) is arranged outside the dust collecting box (1) and is used to pull upwards the end of the battery electrode (S) to be tested that is away from the test plate (2).
2. The lithium battery pole piece peel strength testing device according to claim 1, characterized in that: A suction port (12) is provided at the lower end of the dust collecting box (1) on at least one side facing the test plate (2), and a dust collecting device (4) is connected to the suction port (12).
3. The lithium battery pole piece peel strength testing device according to claim 2, characterized in that: A guide portion (13) is fixedly arranged on the inner bottom surface of the accommodating space (11), and the guide portion (13) has a guide surface (131) inclined toward the suction port (12); the test plate (2) is vertically arranged at the top end of the guide portion (13) and is detachably fixedly connected to the guide portion (13).
4. The lithium battery pole piece peel strength testing device according to claim 3, characterized in that: It also comprises a first clamping device (5) and a support frame (6), wherein the support frame (6) is fixedly arranged on the bottom surface of the dust box (1), the first clamping device (5) is located below the dust box (1) and is fixedly connected to the support frame (6), the top end of the guide portion (13) has a through groove (132) vertically penetrating the dust box (1), and the lower end of the test plate (2) passes through the through groove (132) and is detachably fixedly connected to the first clamping device (5).
5. The lithium battery pole piece peeling strength testing device according to claim 4, characterized in that: The first clamping device (5) comprises a fixed seat (51), a first limiting plate (52), a second limiting plate (53), a clamping plate (54) and an adjusting screw (55); the fixed seat (51) is fixedly arranged on the support frame (6); the first limiting plate (52) and the second limiting plate (53) are arranged in parallel at intervals on the top surface of the fixed seat (51); the clamping plate (54) is arranged in parallel between the first limiting plate (52) and the second limiting plate (53); the clamping plate (54) is used to cooperate with the first limiting plate (52) to clamp the test plate (2); one end of the adjusting screw (55) is rotatably connected to the clamping plate (54); the other end passes through the second limiting plate (53) and is threadedly connected thereto; the adjusting screw (55) can adjust the distance between the clamping plate (54) and the first limiting plate (52).
6. The lithium battery pole piece peeling strength testing device according to claim 5, characterized in that: The first clamping device (5) further comprises at least two guide rods (56), the guide rods (56) being horizontally located between the first limit plate (52) and the second limit plate (53) and movably passing through the clamping plate (54), the two ends of the guide rods (56) being respectively vertically fixedly connected to the first limit plate (52) and the second limit plate (53), and the clamping plate (54) being able to slide horizontally along the guide rods (56).
7. The lithium battery pole piece peel strength testing device according to claim 5, characterized in that: The first clamping device (5) further comprises a third limiting plate (57), the third limiting plate (57) being horizontally located below the pressing plate (54), and the two ends of the third limiting plate (57) being fixedly connected to the first limiting plate (52) and the second limiting plate (53) respectively.
8. The lithium battery pole piece peel strength testing device according to claim 1, characterized in that: The tensile testing assembly (3) comprises a tensile testing machine (31) and a second clamping device (32); the tensile testing machine (31) is fixedly arranged outside the dust collecting box (1); the testing end of the tensile testing machine (31) is fixedly connected to an end of the battery electrode (S) to be tested away from the testing plate (2) via the second clamping device (32); the structure of the second clamping device (32) is the same as that of the first clamping device (5).
9. The lithium battery pole piece peeling strength testing device according to claim 2, characterized in that: The dust suction device (4) comprises a dust suction hood (41), a pipe (42), a suction pump (43) and a collection container (44); the dust suction hood (41) is fixedly connected to the suction port (12); the inlet of the suction pump (43) is fixedly connected to the dust suction hood (41) via the pipe (42); and the outlet of the suction pump (43) is connected to the collection container (44).