Cylindrical pole piece flexibility detection sizing fixture

Abstract

This utility model discloses a cylindrical electrode sheet flexibility testing and shaping fixture, which can assist in the rapid shaping of cylindrical electrode sheets. It includes a platform, an electrode sheet support plate, a lifting bracket, a slide block, a driving device, a roller, a slide bar, a gear, and a rack. The electrode sheet support plate is positioned above the platform for holding the electrode sheet to be rolled. The lifting bracket is vertically movable above the platform and located on the side of the electrode sheet support plate. The slide block is horizontally movable within the lifting bracket. The driving device is positioned between the lifting bracket and the slide block to drive the slide block to move horizontally. A roller is rotatably fitted on the side of the slide block facing the electrode sheet support plate, and a slide bar is detachably fitted on the circumference of the roller. The outer surface of the slide bar is provided with adhesive backing. The roller is movably fitted above the electrode sheet support plate as the slide block moves horizontally. A gear is rotatably fitted on the other side of the slide block, and the gear is coaxially connected to the roller. A rack meshing with the gear is provided inside the lifting bracket.

Description

Technical Field

[0001] This utility model belongs to the field of electrode flexibility testing technology, and specifically refers to a cylindrical electrode flexibility testing and shaping fixture. Background Technology

[0002] Electrode tortuosity is a key parameter describing the complexity of the internal pore structure of an electrode, directly affecting the lithium-ion transport efficiency within the electrode. Higher tortuosity results in a more tortuous ion transport path, significantly impacting battery cycle life, rate performance, and capacity retention. Electrode tortuosity influences ion transport kinetics, material utilization uniformity, and thermal stability, becoming a core factor determining battery lifespan. Optimizing tortuosity requires a multi-dimensional approach, addressing materials, processes, and structure to balance porosity, mechanical strength, and manufacturing cost, achieving a balance between high energy density and long lifespan. In the future, with advancements in in-situ detection technology and multi-scale modeling, precise control of tortuosity will become a key breakthrough in the development of next-generation batteries.

[0003] Electrode flexibility is a crucial parameter affecting the tortuosity of the electrode in a shaped battery. It determines the state of the electrode after it is bent or even folded into a specific shape, and involves the external reaction force generated after the electrode is deformed.

[0004] In existing technologies, electrode sheets are mainly bent into U-shapes or rolled into cylindrical shapes manually, and then the shaped electrode sheets are placed on a testing instrument for inspection. Especially when rolling the electrode sheets into cylindrical shapes, it is difficult to ensure that the curvature of the rolled shape is uniform by manual operation, and the already rolled shape is easily damaged when gluing adjacent sides after rolling, making it difficult to obtain cylindrical electrode sheets in the end, resulting in extremely low operation efficiency. Utility Model Content

[0005] The main purpose of this utility model is to provide a cylindrical electrode sheet flexibility testing and shaping fixture, which solves the problems existing in the prior art and can help realize the rapid shaping of cylindrical electrode sheets.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A cylindrical electrode sheet flexibility testing and shaping fixture includes a platform, an electrode sheet support plate, a lifting bracket, a slide, a driving device, a roller, a slide bar, a gear, and a rack. The electrode sheet support plate is disposed above the platform for placing the electrode sheet to be wound. The lifting bracket is movably fitted above the platform and located on the side of the electrode sheet support plate. The slide is movably fitted inside the lifting bracket. The driving device is disposed between the lifting bracket and the slide for driving the slide to move left and right. A roller is rotatably fitted on the side of the slide facing the electrode sheet support plate, and a slide bar is detachably fitted on the circumference of the roller. The outer side of the slide bar is provided with adhesive. The roller is movably fitted above the electrode sheet support plate as the slide moves left and right. A gear is rotatably fitted on the other side of the slide, and the gear is coaxially connected to the roller. A rack meshing with the gear is disposed inside the lifting bracket.

[0008] Several support rods are provided between the electrode support plate and the platform.

[0009] Guide columns are provided on both sides of the lifting bracket, and guide blocks that slide on the corresponding guide columns are provided on both sides of the lifting bracket; a limit plate is provided at the upper end of the guide column, and a spring is sleeved on the circumference of the guide column, with the upper and lower ends of the spring abutting against the limit plate and the guide block respectively.

[0010] The lifting bracket is provided with a slide rail for the sliding block to cooperate with, and the slide rail is arranged parallel to the rack vertically.

[0011] The driving device is a rod that is fixedly connected to the slide.

[0012] The drive device is a linear module, with its main body and output part fixedly connected to the lifting bracket and the slide block, respectively.

[0013] The roller has a groove on its circumferential surface for the slide bar to be inserted and fitted, and the groove extends along the axial direction of the roller.

[0014] The slide is equipped with a bearing, and the roller and gear are coaxially connected to the bearing.

[0015] After adopting the above technical solution, the present invention has the following technical effects:

[0016] This invention can be used to assist in the rapid shaping of cylindrical electrode sheets, rolling the electrode sheets into a cylindrical shape and shaping them for relevant testing. The lifting bracket can be adjusted in height to ensure that the roller contacts or separates from the electrode sheet support plate. During the left and right movement of the slide, the meshing of the gear and rack drives the gear to rotate, thereby causing the roller to rotate. The roller's circumference is equipped with adhesive-backed sliders that can pre-attach one end of the electrode sheet, thus enabling the electrode sheet to be rolled into a cylindrical shape during the roller's rotation. The detachable sliders can be removed from the roller after the electrode sheet is rolled into shape. The two sides of the sliders can be attached to both ends of the electrode sheet at the beginning and end of the rolling process to achieve shaping and maintain the cylindrical shape of the electrode sheet. Attached Figure Description

[0017] Figure 1 This is a perspective view of a specific embodiment of the present utility model.

[0018] Figure 2 This is a front view of a specific embodiment of the present utility model.

[0019] Figure 3 This is a rear view of a specific embodiment of the present utility model.

[0020] Explanation of icon numbers:

[0021] 1-Platform; 2-Electrode support plate; 3-Lifting bracket; 31-Guide block; 4-Slide seat; 5-Drive device; 6-Roller; 61-Intercepting groove; 7-Slide bar; 8-Gear; 9-Rack; 10-Support rod; 20-Guide column; 201-Limiting plate; 30-Spring; 40-Slide rail; 50-Bearing. Detailed Implementation

[0022] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0023] refer to Figure 1-3 As shown, this utility model discloses a cylindrical electrode flexibility testing and shaping fixture, including a platform 1, an electrode support plate 2, a lifting bracket 3, a slide 4, a driving device 5, a roller 6, a slide bar 7, a gear 8, and a rack 9;

[0024] The electrode support plate 2 is set above the platform 1 and is used to place the electrode to be wound.

[0025] The lifting bracket 3 moves up and down above the platform 1 and is located on the side of the electrode support plate 2;

[0026] The slide 4 moves left and right within the lifting bracket 3;

[0027] The drive device 5 is located between the lifting bracket 3 and the slide 4, and is used to drive the slide 4 to move left and right.

[0028] The slide block 4 is rotatably fitted with a roller 6 on the side facing the electrode support plate 2. The roller 6 is detachably fitted with a slide bar 7 on its circumference. The outer side of the slide bar 7 is provided with adhesive backing. The roller 6 moves and engages above the electrode support plate 2 as the slide block 4 moves left and right.

[0029] The other side of the slide 4 is rotatably fitted with a gear 8, which is coaxially connected to the roller 6; the lifting bracket 3 is equipped with a rack 9 that meshes with the gear 8.

[0030] Through the above scheme, this utility model can be used to assist in the rapid shaping of cylindrical electrode sheets, rolling the electrode sheets into a cylindrical shape and shaping them for relevant testing; wherein, the lifting bracket 3 can be adjusted in height to ensure that the roller 6 contacts or separates from the electrode sheet support plate 2; during the left and right movement of the slide block 4, the gear 8 and the rack 9 mesh, which can drive the gear 8 to rotate, thereby driving the roller 6 to rotate; and the circumferential surface of the roller 6 is provided with a slide strip 7 with adhesive backing, which can be pre-attached to one end of the electrode sheet, so that the electrode sheet is rolled into a cylindrical shape during the rotation of the roller 6. The detachable slide strip 7 can also be removed from the roller 6 after the electrode sheet is rolled into shape, and the two sides of the slide strip 7 can be attached to the two ends of the electrode sheet at the beginning and end of the rolling process to achieve shaping and maintain the cylindrical shape of the electrode sheet.

[0031] The following are specific embodiments of the present invention.

[0032] Several support rods 10 are provided between the electrode support plate 2 and the platform 1. The height of the electrode support plate 2 can be adjusted by the support rods 10 of different lengths.

[0033] Guide posts 20 are provided on both sides of the aforementioned lifting bracket 3, and guide blocks 31 are provided on both sides of the lifting bracket 3, which are slidably engaged with the corresponding guide posts 20. A limit plate 201 is provided at the upper end of the guide post 20, and a spring 30 is sleeved on the circumference of the guide post 20. The upper and lower ends of the spring 30 abut against the limit plate 201 and the guide block 31, respectively. Thus, the elastic force applied by the spring 30 allows the lifting bracket 3 to have a downward tendency, ensuring that the roller 6 can be pressed tightly against the electrode of the electrode support plate 2.

[0034] The aforementioned lifting bracket 3 is provided with a slide rail 40 for the sliding block 4 to cooperate with, and the slide rail 40 is arranged parallel to the rack 9 vertically.

[0035] The aforementioned drive device 5 can be driven manually or automatically (electrically). When the drive device 5 is driven manually, it can be a cylindrical rod that is fixedly connected to the slide 4 and is easy to grip. The user can directly push or pull the rod to move the slide 4 left and right. When the drive device 5 is driven automatically, it can be a linear module, and its main body and output part can be fixedly connected to the lifting bracket 3 and the slide 4 respectively to drive the slide 4.

[0036] The roller 6 has a groove 61 on its circumferential surface for inserting and engaging the slide bar 7. The groove 61 extends along the axial direction of the roller 6. The slide bar 7 can be detachably engaged with the roller 6 by insertion.

[0037] The slide 4 is equipped with a bearing 50, and the roller 6 and gear 8 are coaxially connected to the bearing 50.

[0038] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A cylindrical electrode sheet flexibility testing and shaping fixture, characterized in that: Includes platform, electrode support plate, lifting bracket, slide, drive unit, roller, slide bar, gear and rack; The electrode support plate is disposed above the platform and is used to place the electrode to be wound. The lifting bracket is movably fitted above the platform and located on the side of the electrode support plate; The slide block moves left and right within the lifting bracket; The driving device is disposed between the lifting bracket and the slide block, and is used to drive the slide block to move left and right. The slide block is rotatably fitted with a roller on the side facing the electrode support plate. A slide bar is detachably fitted on the circumference of the roller. The outer side of the slide bar is provided with adhesive backing. The roller is movably fitted above the electrode support plate as the slide block moves left and right. A gear is rotatably fitted on the other side of the slide, and the gear is coaxially connected to the roller; a rack that meshes with the gear is provided inside the lifting bracket.

2. The cylindrical electrode sheet flexibility testing and shaping fixture as described in claim 1, characterized in that: Several support rods are provided between the electrode support plate and the platform.

3. The cylindrical electrode sheet flexibility testing and shaping fixture as described in claim 1, characterized in that: Guide columns are provided on both sides of the lifting bracket, and guide blocks that slide on the corresponding guide columns are provided on both sides of the lifting bracket; a limit plate is provided at the upper end of the guide column, and a spring is sleeved on the circumference of the guide column, with the upper and lower ends of the spring abutting against the limit plate and the guide block respectively.

4. The cylindrical electrode sheet flexibility testing and shaping fixture as described in claim 1, characterized in that: The lifting bracket is provided with a slide rail for the sliding block to cooperate with, and the slide rail is arranged parallel to the rack vertically.

5. The cylindrical electrode sheet flexibility testing and shaping fixture as described in claim 1, characterized in that: The driving device is a rod that is fixedly connected to the slide.

6. The cylindrical electrode sheet flexibility testing and shaping fixture as described in claim 1, characterized in that: The drive device is a linear module, with its main body and output part fixedly connected to the lifting bracket and the slide block, respectively.

7. The cylindrical electrode sheet flexibility testing and shaping fixture as described in claim 1, characterized in that: The roller has a groove on its circumferential surface for the slide bar to be inserted and fitted, and the groove extends along the axial direction of the roller.

8. The cylindrical electrode sheet flexibility testing and shaping fixture as described in claim 1, characterized in that: The slide is equipped with a bearing, and the roller and gear are coaxially connected to the bearing.

Images