A battery film puncture strength detection device

Abstract

The utility model discloses a kind of battery film puncture strength detection device, comprising: for fixing battery film's fixed support and for puncturing battery film's thimble, the top of fixed support is respectively installed with clamping plate component, battery film is clamped and fixed between two clamping plate components, clamping plate component includes lower clamping plate and upper clamping plate, lower clamping plate and upper clamping plate are connected by clamping adjusting part, two clamping plate components are symmetrically arranged, thimble is located above upper clamping plate;One of clamping plate component is connected with the tension adjusting part for adjusting the tension of battery film, two lower clamping plate relative side is respectively installed with tension detection part;Still include controller, tension adjusting part and tension detection part are controlled by controller.The utility model realizes the automatic, accurate adjustment of film tension, further improves the accuracy and reliability of test.

Description

Technical Field

[0001] This utility model relates to the field of battery film technology, specifically a battery film puncture strength testing device. Background Technology

[0002] Battery films mainly include separators and electrolyte membranes, and their performance directly affects battery charging and discharging efficiency, internal resistance, cycle life, and safety. For example, the separator, as the isolation layer between the positive and negative electrodes, needs to have good ion permeability, mechanical strength, and chemical stability to prevent short circuits between the positive and negative electrodes while ensuring smooth lithium ion transport. The electrolyte membrane plays a crucial role in the battery's ion conduction process, and its performance directly affects the battery's energy conversion efficiency and power output.

[0003] Chinese patent publication number CN219532697U discloses a lithium battery separator puncture strength test structure, including a fixed support and a pin. A lower clamping plate is installed on the inner side of the fixed support, and an upper clamping plate is provided on the upper side of the lower clamping plate. A separator is installed between the lower clamping plate and the upper clamping plate. A locking buckle is installed at the front end of the upper clamping plate and the lower clamping plate. A pin is provided directly above the upper clamping plate. A positioning bolt is installed on one side of the fixed support.

[0004] The aforementioned patent can solve the corresponding technical problems and continuously test the puncture strength of lithium battery separators. However, the patent uses manual operation of the upper and lower clamps to clamp the battery separator, which cannot precisely control the tension of the film. If the separator is installed too loosely, it may shift or wrinkle during the puncture process, resulting in uneven transmission of puncture force and failing to accurately reflect the puncture strength of the separator. If it is installed too tightly, the separator itself will be in a pre-stretched state, and the puncture strength data obtained during the test will be too high, which also cannot accurately reflect the performance of the separator under normal use. Utility Model Content

[0005] The purpose of this invention is to provide a battery film puncture strength testing device, which solves the problem in the prior art that the clamping force and tension of the film cannot be accurately controlled by manually operating the upper and lower clamping plates to clamp the battery separator.

[0006] To achieve the above objectives, the main technical solution adopted by this utility model includes: a battery film puncture strength detection device, comprising: a fixing support for fixing the battery film and a pin for puncturing the battery film; clamping plate components are respectively installed on both sides of the top of the fixing support; the battery film is clamped and fixed between the two clamping plate components; each clamping plate component includes a lower clamping plate and an upper clamping plate; the lower clamping plate and the upper clamping plate are connected by a clamping adjustment component; the two clamping plate components are symmetrically arranged; the pin is located above the upper clamping plate; one of the clamping plate components is connected to a tension adjustment component for adjusting the tension of the battery film; tension detection components are respectively installed on opposite sides of the two lower clamping plates; and a controller is also included, wherein the tension adjustment component and the tension detection component are both controlled by the controller.

[0007] As a preferred technical solution, the clamping adjustment component includes a second bearing fixedly installed on the upper clamping plate, an adjusting bolt fixedly installed in the inner ring of the second bearing, a threaded groove opened on the top of the lower clamping plate, and the lower end of the adjusting bolt threadedly connected to the inside of the threaded groove.

[0008] As a preferred technical solution, a guide rod is fixedly installed on the top of the lower clamping plate, and a third bearing is fixedly installed on the upper clamping plate, with the guide rod movably installed in the inner ring of the third bearing.

[0009] As a preferred technical solution, the tensioning adjustment component includes a screw, a screw sleeve, and a drive motor. The top of the fixed support is provided with a sliding groove, and a slider is slidably connected inside the sliding groove. The fixed support is provided with an installation cavity, and the sliding groove communicates with the installation cavity.

[0010] The inner walls of the mounting cavity are respectively fixedly installed with first bearings at both ends. The screw is fixedly installed between the inner rings of the two first bearings. The screw sleeve is threaded onto the screw, and the upper part of the screw sleeve is fixedly connected to the lower part of the slider. The drive motor is fixedly installed at one end of the fixed support, and the output shaft of the drive motor is fixedly connected to one end of the screw.

[0011] One of the lower clamping plates is fixedly connected to the slider, and the other lower clamping plate is fixedly installed on the top of the fixed support;

[0012] The drive motor is electrically connected to the controller.

[0013] As a preferred technical solution, rubber protective pads are fixedly installed on the clamping surfaces of the lower clamping plate and the upper clamping plate respectively.

[0014] As a preferred technical solution, the tension detection component is a tension sensor. The tension sensor is fixedly installed on the inner edge of the lower clamping plate through a connecting plate, and the vertex of the detection end of the tension sensor is higher than the top surface of the protective pad on the lower clamping plate. The detection end of the tension sensor is in contact with the bottom surface of the battery film.

[0015] The tension sensor is electrically connected to the controller.

[0016] As a preferred technical solution, the third bearing is a linear bearing.

[0017] This utility model has at least the following beneficial effects:

[0018] This utility model provides a battery film puncture strength testing device. By setting clamping plates on both sides of the top of the fixed support, the battery film can be effectively clamped and fixed, preventing displacement or shaking of the film during the puncture test, ensuring the stability of the test environment, and thus improving the accuracy of the test results. The tension adjustment component allows for flexible adjustment of the battery film tension according to different test requirements or film characteristics, simulating different stress states of the film in actual applications, making the test results more valuable. The tension detection component monitors the tension of the battery film in real time and feeds the data back to the controller. The controller can accurately control the tension adjustment component according to the preset tension value, realizing automatic and precise adjustment of the film tension, further improving the accuracy and reliability of the test.

[0019] The rubber protective pads effectively prevent the upper and lower clamps from directly contacting the film and causing scratches or damage. On the other hand, they increase the friction between the upper and lower clamps and the film, making the film less prone to displacement during testing and improving the reliability of the test results. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a three-dimensional schematic diagram of the battery film puncture strength testing device of this utility model;

[0022] Figure 2 This is a schematic diagram of the connection structure between the lower clamping plate and the upper clamping plate of the battery film puncture strength testing device of this utility model.

[0023] Figure 3 This is a cross-sectional view of the fixed support of the battery film puncture strength testing device of this utility model;

[0024] Figure 4This is a schematic diagram of the battery film under tensile stress in the battery film puncture strength testing device of this utility model.

[0025] Explanation of icon numbers:

[0026] 1. Fixed support; 101. Slide groove; 1011. Slider; 102. Mounting cavity; 1021. First bearing; 2. Lower clamping plate; 201. Threaded groove; 202. Guide rod; 203. Connecting plate; 3. Upper clamping plate; 301. Second bearing; 302. Adjusting bolt; 303. Third bearing; 4. Protective pad; 5. Screw; 501. Screw sleeve; 6. Drive motor; 7. Tension sensor; 8. Controller; 9. Battery film; 10. Ejector pin. Detailed Implementation

[0027] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0028] Example

[0029] Please refer to Figures 1 to 4 As shown, this embodiment provides a battery film puncture strength testing device, including: a fixing support 1 for fixing a battery film 9 and a pin 10 for puncturing the battery film 9. Clamping plate components are respectively installed on both sides of the top of the fixing support 1. The battery film 9 is clamped and fixed between the two clamping plate components. The clamping plate components include a lower clamping plate 2 and an upper clamping plate 3, which are connected by a clamping adjustment component. The two clamping plate components are symmetrically arranged, with the pin 10 located above the upper clamping plate 3. One of the clamping plate components is connected to a tension adjustment component for adjusting the tension of the battery film 9. Tension detection components are respectively installed on opposite sides of the two lower clamping plates 2. The device also includes a controller 8, which controls both the tension adjustment component and the tension detection component. By setting clamping plate components on both sides of the top of the fixing support 1, the battery film 9 can be effectively clamped and fixed, preventing displacement or shaking of the film during the puncture test, ensuring the stability of the test environment, and thus improving the accuracy of the test results.

[0030] The tension adjustment mechanism allows for flexible adjustment of the battery film 9's tension according to different testing requirements or film characteristics, simulating different stress states of the film in actual applications. This makes the test results more valuable. The tension detection device monitors the tension of the battery film 9 in real time and feeds the data back to the controller 8. The controller 8 can precisely control the tension adjustment mechanism according to the preset tension value, achieving automatic and precise adjustment of the film's tension and further improving the accuracy and reliability of the test.

[0031] The clamping adjustment component includes a second bearing 301 fixedly mounted on the upper clamping plate 3. An adjusting bolt 302 is fixedly mounted in the inner ring of the second bearing 301. A threaded groove 201 is provided on the top of the lower clamping plate 2. The lower end of the adjusting bolt 302 is threadedly connected to the inside of the threaded groove 201. Through the threaded connection between the adjusting bolt 302 and the threaded groove 201, the operation is simple and the adjustment accuracy is high. By simply rotating the adjusting bolt 302, the distance between the upper and lower clamping plates can be precisely changed, thereby accurately controlling the clamping force on the battery film 9 and ensuring that the film is stably clamped. The setting of the second bearing 301 prevents the upper clamping plate 3 from rotating with the adjusting bolt 302.

[0032] The lower clamping plate 2 has a guide rod 202 fixedly installed on its top, and the upper clamping plate 3 has a third bearing 303 fixedly installed on its top. The guide rod 202 is movably installed in the inner ring of the third bearing 303. Through the cooperation of the guide rod 202 and the third bearing 303, a stable guiding effect is provided for the up and down movement of the upper clamping plate 3 during the adjustment process. This allows the upper clamping plate 3 to maintain parallel movement when the distance between it and the lower clamping plate 2 is changed by adjusting the bolt 302, avoiding tilting or jamming. This ensures that the clamping force on the battery film 9 is evenly distributed and improves the reliability of the test results.

[0033] The tension adjustment component includes a screw 5, a threaded sleeve 501, and a drive motor 6. A groove 101 is provided on the top of the fixed support 1, and a slider 1011 is slidably connected inside the groove 101. An installation cavity 102 is provided inside the fixed support 1, and the groove 101 communicates with the installation cavity 102. First bearings 1021 are fixedly installed at both ends of the inner wall of the installation cavity 102. The screw 5 is fixedly installed between the inner rings of the two first bearings 1021. The threaded sleeve 501 is threaded onto the screw 5, and its upper part is fixedly connected to the lower part of the slider 1011. The drive motor 6 is fixedly installed on the fixed support 1. One end of the fixed support 1 is fixedly connected to the output shaft of the drive motor 6 and one end of the screw 5; one lower clamping plate 2 is fixedly connected to the slider 1011, and the other lower clamping plate 2 is fixedly installed on the top of the fixed support 1; the drive motor 6 is electrically connected to the controller 8, and the drive motor 6 drives the screw 5 to rotate, so that the screw sleeve 501 moves on the screw 5, thereby driving the slider 1011 and the lower clamping plate 2 connected thereto to move, so as to adjust the tension of the battery film 9. This electric adjustment method is more efficient and precise than manual adjustment, and can be controlled and automated by the controller 8.

[0034] The design of the groove 101 and the slider 1011 ensures the stability and straightness of the lower clamp 2 during movement, prevents it from shifting when adjusting the tension, ensures uniform force on the battery film 9, improves the accuracy of the test, and can adapt to battery films 9 of different sizes. The tension of the film can be adjusted by adjusting the position of the lower clamp 2, thus expanding the applicability of the device.

[0035] Rubber protective pads 4 are fixedly installed on the clamping surfaces of the lower clamping plate 2 and the upper clamping plate 3 respectively. The rubber protective pads 4 can effectively prevent the upper and lower clamping plates from directly contacting the film and causing scratches or damage. On the other hand, they increase the friction between the upper and lower clamping plates and the film, making the film less likely to shift during the test and improving the reliability of the test results.

[0036] The tension detection component is a tension sensor 7, which is fixedly installed on the inner edge of the lower clamping plate 2 via a connecting plate 203. The vertex of the detection end of the tension sensor 7 is higher than the top surface of the protective pad 4 on the lower clamping plate 2, and the detection end of the tension sensor 7 is in contact with the bottom surface of the battery film 9. The tension sensor 7 is electrically connected to the controller 8. The tension sensor 7 can accurately detect the tension of the battery film 9 in real time and transmit the data to the controller 8. Since the vertex of its detection end is higher than the top surface of the protective pad 4 and in contact with the bottom surface of the film, it can accurately sense the tension change of the film and provide reliable data for the controller 8 so that the controller 8 can control the tension adjustment component in time to ensure that the film is always at a suitable tension.

[0037] Among them, the third bearing 303 is a linear bearing. The linear bearing can further reduce the radial clearance and shaking of the upper clamping plate during the movement process, making the lifting and lowering of the upper clamping plate 3 more stable and precise, thereby improving the control accuracy of the clamping force of the battery film 9 and optimizing the accuracy of the test results.

[0038] It is worth noting that the tension sensor 7 can be selected from the MAGPOWR TS series;

[0039] The controller model 8 can be selected as 6ES72350KD220XA8;

[0040] The ejector pin 10 is referenced from the Chinese Patent Publication No. CN219532697U. The ejector pin 10 is fixed on the upper arm of the universal testing machine. Its specific structure and working principle will not be described in detail here.

[0041] As is well known to those skilled in the art, the working principles and wiring methods of the drive motor 6, tension sensor 7, and controller 8 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can select any model according to their needs or convenience.

[0042] Working principle:

[0043] In use, first lay the battery film 9 flat on the lower clamping plate 2 of the clamping plate components on both sides of the top of the fixed support 1, so that the film is in a suitable position to ensure that the subsequent puncture operation can be carried out in the effective area. Then rotate the adjusting bolt 302. Since the adjusting bolt 302 is connected to the upper clamping plate 3 through the second bearing 301, and its lower end is threaded in the threaded groove 201 of the lower clamping plate 2, rotating the adjusting bolt 302 will cause the upper clamping plate 3 to move downward along the guide rod 202. As the upper clamping plate 3 moves downward, the rubber protective pad 4 between the upper and lower clamping plates will gradually clamp the battery film 9 until a suitable clamping degree is reached to prevent the film from sliding during the test.

[0044] Then, the controller 8 controls the drive motor 6 to drive the screw 5 to rotate. The screw 5 is installed between the inner rings of the first bearing 1021 at both ends of the inner wall of the mounting cavity 102. The screw sleeve 501 is threaded on the screw 5 and connected to the slider 1011. The slider 1011 slides in the slide groove 101. The rotation of the screw 5 will cause the screw sleeve 501 to drive the slider 1011 to move, thereby driving the lower clamping plate 2, which is fixedly connected to the slider 1011, to move, thereby realizing the adjustment of the tension of the battery film 9.

[0045] During the process of adjusting the tension of the battery film 9 by driving motor 6, since the tension sensor 7 is fixed to the inner edge of the lower clamping plate 2 through the connecting plate 203 and its detection end is in contact with the bottom surface of the battery film 9, it can detect the tension of the battery film 9 in real time and transmit the detected tension data to the controller 8, and continue to adjust until the tension value detected by the tension sensor 7 reaches the preset tension parameter.

[0046] After the tension of the battery film 9 is adjusted, the ejector pin 10 is controlled to move downward at a set speed and force to perform a puncture test on the battery film 9.

[0047] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A battery film puncture strength testing device, comprising a fixing support (1) for fixing a battery film (9), a piercing pin (10) for puncturing the battery film (9), and a controller (8), characterized in that: Clamping components are respectively installed on the top two sides of the fixed support (1). The battery film (9) is clamped and fixed between the two clamping components. The clamping components include a lower clamping plate (2) and an upper clamping plate (3). The lower clamping plate (2) and the upper clamping plate (3) are connected by a clamping adjustment component. The two clamping components are symmetrically arranged. The ejector pin (10) is located above the upper clamping plate (3). One of the clamping components is connected to a tension adjustment component for adjusting the tension of the battery film (9). Tension detection components are respectively installed on opposite sides of the two lower clamping plates (2). The tension adjustment component and the tension detection component are both controlled by the controller (8). The tensioning adjustment component includes a screw (5), a screw sleeve (501), and a drive motor (6). A groove (101) is provided on the top of the fixed support (1), and a slider (1011) is slidably connected inside the groove (101). An installation cavity (102) is provided inside the fixed support (1), and the groove (101) communicates with the installation cavity (102). First bearings (1021) are fixedly installed at both ends of the inner wall of the installation cavity (102). The screw (5) is fixedly installed between the inner rings of the two first bearings (1021). The threaded sleeve (501) is threaded onto the screw (5), and the upper part of the threaded sleeve (501) is fixedly connected to the lower part of the slider (1011). The drive motor (6) is fixedly installed on one end of the fixed support (1), and the output shaft of the drive motor (6) is fixedly connected to one end of the screw (5). One of the lower clamping plates (2) is fixedly connected to the slider (1011), and the other lower clamping plate (2) is fixedly installed on the top of the fixed support (1). The drive motor (6) is electrically connected to the controller (8). The tension detection component is a tension sensor (7). The tension sensor (7) is fixedly installed on the inner edge of the lower clamping plate (2) by a connecting plate (203). The vertex of the detection end of the tension sensor (7) is higher than the top surface of the protective pad (4) on the lower clamping plate (2). The detection end of the tension sensor (7) is in contact with the bottom surface of the battery film (9). The tension sensor (7) is electrically connected to the controller (8).

2. The battery film puncture strength testing device according to claim 1, characterized in that: The clamping adjustment component includes a second bearing (301) fixedly installed on the upper clamping plate (3), an adjusting bolt (302) fixedly installed in the inner ring of the second bearing (301), and a threaded groove (201) is provided on the top of the lower clamping plate (2), and the lower end of the adjusting bolt (302) is threadedly connected to the inside of the threaded groove (201).

3. The battery film puncture strength testing device according to claim 2, characterized in that: A guide rod (202) is fixedly installed on the top of the lower clamping plate (2), and a third bearing (303) is fixedly installed on the upper clamping plate (3). The guide rod (202) is movably installed in the inner ring of the third bearing (303).

4. The battery film puncture strength testing device according to claim 1, characterized in that: Rubber protective pads (4) are fixedly installed on the clamping surfaces of the lower clamping plate (2) and the upper clamping plate (3).

5. The battery film puncture strength testing device according to claim 3, characterized in that: The third bearing (303) is a linear bearing.

Images