Pole piece positioning tool and pole piece burr detection device

Abstract

The utility model discloses a pole piece positioning tool which comprises a base and a clamping assembly arranged on the base and used for clamping and positioning a pole piece. The clamping assembly comprises a positioning body and a clamping structure; the positioning body is matched with the clamping structure to form at least the following two clamping stations: the first station is used for clamping the pole piece, so that the tangent plane of the pole piece is arranged in a longitudinal upward manner; and the second station is used for clamping the pole piece, so that the tangent plane of the pole piece is arranged in a horizontal transverse manner. The pole piece burr detection device has the advantages that the pole piece can be subjected to multi-station clamping and positioning, so that the detection device can detect the tangent plane of the pole piece from different angles, and the burr detection accuracy and reliability can be improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery electrode testing technology, and in particular to an electrode positioning fixture and an electrode burr detection device. Background Technology

[0002] With the booming development of the new energy vehicle market, the safety performance and efficiency optimization of lithium batteries have become a focus of industry attention. In the structure of lithium batteries, the electrode sheet is a core component, and its manufacturing process is particularly critical. Specifically, the manufacturing of the electrode sheet involves the coating, drying, and subsequent slitting of the slurry. However, during the slitting process, due to tool wear, burrs often form on the edges of the electrode sheet. If these burrs are not properly removed, once used in lithium batteries, their sharp surface burrs could potentially puncture the battery separator, leading to internal short circuits, causing serious safety hazards such as overheating, swelling, and even explosion. Therefore, rigorous burr detection of the electrode sheets has become an indispensable part of the industry.

[0003] Given the extremely high precision requirements for burr detection, the industry generally uses a microscope in conjunction with a specialized tooling fixture for inspection. For example, Chinese utility model patent CN207336391U discloses a lithium battery electrode cutting burr detection device, which clamps the cut electrode sheets onto a tooling fixture and precisely positions the fixture below the lens of a detection device equipped with an electron microscope, allowing the detection device to perform burr detection on the electrode sheets on the tooling fixture.

[0004] However, the above-mentioned solution has drawbacks in practical applications: Specifically, the tooling fixtures generally use two sets of clamping plates to hold the electrode sheet horizontally facing each other, ensuring that the cut surface of the electrode sheet is directly opposite the inspection lens. Although this method can effectively detect transverse burrs extending horizontally parallel to the cut surface on the electrode sheet, it is difficult to accurately detect longitudinal burrs extending vertically to the cut surface on the electrode sheet. This may result in electrode sheets that have undergone burr inspection still having potential safety hazards in practical applications. Utility Model Content

[0005] One objective of this invention is to provide an electrode positioning fixture that can perform multi-station clamping and positioning of the electrode, which is beneficial to improving the accuracy of burr detection on the electrode cut surface.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] An electrode positioning fixture includes: a base and a clamping assembly disposed on the base and used for clamping and positioning electrode sheets; the clamping assembly includes a positioning body and a clamping structure; the positioning body and the clamping structure cooperate to form at least the following two clamping stations: a first station for clamping the electrode sheet such that the cut surface of the electrode sheet is arranged in a longitudinally upward manner; and a second station for clamping the electrode sheet such that the cut surface of the electrode sheet is arranged in a horizontally transverse manner.

[0008] Furthermore, the positioning body has a positioning surface for the electrode sheet to abut in one direction, and the clamping structure can cooperate with the positioning surface to clamp and position the electrode sheet; the positioning surface includes at least a longitudinally extending first positioning surface and a horizontally extending second positioning surface; the first station is formed on the first positioning surface, and the second station is formed on the second positioning surface.

[0009] Furthermore, the positioning body is connected to a flipping structure, and the positioning body forms a positioning surface for the electrode sheet to abut in one direction; the clamping structure can cooperate with the positioning surface to clamp and position the electrode sheet; the flipping structure can drive the positioning body to flip along a preset direction to form the first station and the second station.

[0010] Furthermore, the flipping structure includes a flipping shaft rotatably positioned on the base, the positioning body is connected to the flipping shaft and can rotate with the flipping shaft, and the flipping shaft can be driven to rotate manually or by an external drive structure.

[0011] Furthermore, the positioning body is provided with a limiting strip, which allows the end of the electrode sheet away from the cut surface to abut and be limited.

[0012] Furthermore, the clamping structure includes a connecting rod, one end of which is rotatably connected to the positioning body. A magnetic pressure plate is provided on the connecting rod, which is used to magnetically attract the positioning body to clamp and position the electrode.

[0013] Furthermore, the base is provided with a movable adjustment component, which is connected to the clamping component and is used to drive the clamping component to move horizontally and linearly relative to the base.

[0014] Furthermore, the movable adjustment component includes a slider and a guide rail connected to the base. The slider is slidably positioned on the guide rail and connected to the clamping component. An adjustment screw is rotatably positioned on the base, and a screw nut adapted to connect the adjustment screw is provided on the slider.

[0015] Furthermore, one end of the adjusting screw is connected to a rotating handle or a motor.

[0016] This application also provides an electrode burr detection device, including a microscopic inspection lens and an electrode positioning fixture as described above, wherein the electrode positioning fixture is arranged at a lower position relative to the microscopic inspection lens.

[0017] Compared with the prior art, the advantages of this utility model include at least the following: setting different clamping stations to perform multi-station clamping and positioning of the electrode sheet, so that the detection device can detect the cross-section of the electrode sheet from different angles, which is conducive to improving the accuracy and reliability of burr detection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the electrode positioning fixture provided in this embodiment. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the electrode positioning fixture provided in this embodiment. Figure 2 ;

[0020] In the picture:

[0021] Reference numerals in the attached drawings: 1. Base; 2. Clamping assembly; 21. Positioning body; 211. First positioning surface; 212. Second positioning surface; 213. Limiting strip; 22. Clamping structure; 221. Magnetic pressure plate; 222. Pull rod; 3. Flipping structure; 231. Flipping shaft; 3. Moving adjustment assembly; 31. Slider; 32. Guide rail; 33. Adjusting screw. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below, with examples of the embodiments shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] In this invention, directional terms such as "center," "longitudinal," and "lateral" are used for description and simplification based on the accompanying drawings and do not limit the actual orientation of the device or component. The terms "first" and "second" are used only for distinction and do not indicate specific meaning in terms of importance or quantity; a feature containing these terms must include at least one. "Multiple" indicates at least two. Terms such as "installation" and "connection" should be interpreted broadly, encompassing fixed, detachable, mechanical, electrical, or communication connections, directly or indirectly connected through a medium, indicating internal communication or interaction, unless otherwise specified. Those skilled in the art will understand the specific application of the above terms in this invention.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings:

[0025] The first preferred embodiment of this utility model is as follows:

[0026] Example 1

[0027] refer to Figure 1 An electrode positioning fixture includes a base 1 for providing support, and a clamping assembly 2 is provided on the base 1. The clamping assembly 2 includes a positioning body 21 and a clamping structure 22. The positioning body 21 and the clamping structure 22 cooperate with each other to form at least two clamping stations for the electrode. The two clamping stations are a first station and a second station. The first station can clamp the electrode so that the cut surface of the electrode is arranged in a longitudinally upward manner. The second station can clamp the electrode so that the cut surface of the electrode is arranged in a horizontally transverse manner.

[0028] In practical applications, the electrode sheet can first be clamped at a first station by the positioning body 21 and the clamping structure 22, with the cut surface of the electrode sheet facing upwards. The detection device then inspects the transverse burrs (transverse burrs refer to burrs extending horizontally parallel to the cut surface) on the cut surface of the electrode sheet from top to bottom. Subsequently, the electrode sheet is clamped at a second station by the positioning body 21 and the clamping structure 22, with the cut surface of the electrode sheet facing horizontally. The detection device then inspects the longitudinal burrs (longitudinal burrs refer to burrs extending vertically from the cut surface) on the cut surface of the electrode sheet from top to bottom. Compared with existing electrode sheet clamping fixtures, this application, by setting different clamping stations, performs multi-station clamping and positioning of the electrode sheet, enabling the detection device to inspect the electrode sheet from different angles, which helps to improve the accuracy and reliability of burr detection.

[0029] The above-mentioned implementation structure of "positioning body 21 cooperating with clamping structure 22 to form multiple clamping stations" has various forms. This embodiment specifically provides one implementation structure: Specifically, the positioning body 21 forms a positioning surface for the electrode sheet to abut in one direction. The clamping structure 22 can cooperate with the positioning surface to clamp and position the electrode sheet. The number of positioning surfaces is at least two, namely a longitudinally extending first positioning surface 211 and a horizontally extending second positioning surface 212. The first station is formed on the first positioning surface 211, that is, the first positioning surface 211 cooperates with the clamping structure 22 to clamp and position the electrode sheet. The second station is formed on the second positioning surface 212, that is, the second positioning surface 212 cooperates with the clamping structure 22 to clamp and position the electrode sheet. In this embodiment, the clamping structure 22 can be a clamping plate, a clamping claw, or other mechanical parts capable of applying sufficient clamping force. For example, a cylinder telescopic mechanism can be used, with a clamping plate provided at the telescopic end of the cylinder telescopic mechanism. The electrode sheet is pressed and fixed on the positioning surface by the cylinder telescopic clamping plate.

[0030] When detecting transverse burrs, the electrode can be placed on the first positioning surface 211, and the clamping structure 22, in conjunction with the first positioning surface 211, clamps the electrode horizontally towards each other, so that the cut surface of the electrode is vertically upward. When detecting longitudinal burrs, the electrode can be placed back on the second positioning surface 212, and the clamping structure 22, in conjunction with the second positioning surface 212, clamps the electrode vertically towards each other, so that the cut surface of the electrode is horizontally transverse. With the above implementation structure, during the inspection process, only the first positioning surface 211 or the second positioning surface 212 needs to be selected to clamp the electrode to achieve the detection of transverse and longitudinal burrs on the cut surface of the electrode, ensuring the quality of the electrode and the batteries produced subsequently. In addition, the above structure is simple and has low production cost; for example, the positioning body 21 can be directly selected from commonly used industrial stainless steel square tubes.

[0031] In this embodiment, a limiting strip 213 is provided on the positioning surface of the positioning body 21. The limiting strip 213 allows the end of the electrode sheet away from the cut surface to abut and be limited. By setting the limiting strip 213, it can be ensured that the electrode sheet can be quickly and accurately positioned on the positioning surface during each test, thereby improving the efficiency and accuracy of the test.

[0032] In this embodiment, the clamping structure 22 adopts a magnetic clamping method, that is, the clamping structure 22 includes a magnetic clamping plate 221, which can magnetically attract the positioning body 21 and attract each other to the positioning body 21, thereby abutting against the electrode sheet to clamp and position the electrode sheet. Compared with traditional clamping methods such as cylinders and threaded fastening, the above-mentioned magnetic clamping method has the following advantages: 1. During the clamping process, due to the uniform distribution of magnetism, the pressure applied to the electrode sheet by the surface of the magnetic clamping plate 221 is more uniform, resulting in higher positioning accuracy and better stability of the electrode sheet after clamping, which can avoid "the electrode sheet cut surface shaking due to slight vibration, causing interference to the detection"; 2. Compared with the mechanical clamping force or friction that may exist in traditional clamping methods, the magnetic clamping method causes less damage to the electrode sheet; 3. In addition, due to the magnetic attraction, the magnetic clamping plate 221 can adaptively clamp electrode sheets of different sizes and specifications, with better versatility.

[0033] In this embodiment, the magnetic pressure plate 221 can magnetically adsorb the positioning body 21 in various ways. That is, both the magnetic pressure plate 221 and the positioning body 21 are made of magnetic materials, or the magnetic pressure plate 221 is made of magnetic material and the positioning body 21 is made of magnetic metal.

[0034] However, in practical applications, to ensure clamping strength, the magnetic attraction between the magnetic pressure plate 221 and the positioning body 21 is usually quite strong. After testing, it is difficult to manually remove the magnetic pressure plate 221 from the positioning body 21, and carelessness may cause wear on the electrode surface. Therefore, in this embodiment, the clamping structure 22 also includes a pull rod 222. One end of the pull rod 222 is rotatably connected to the positioning body 21, and the other end is hinged to the magnetic pressure plate 221. This design allows the operator to easily remove the magnetic pressure plate 221 from the positioning body 21 by pulling the pull rod 222, overcoming the strong magnetic attraction between the magnetic pressure plate 221 and the positioning body 21. This avoids the potential wear on the electrode surface caused by carelessness during manual removal, thus protecting the integrity of the electrode.

[0035] To prevent the magnetic pressure plate 221 from violently impacting the electrode sheet and causing damage to the electrode sheet surface during magnetic pressing, in this embodiment, an elastic buffer layer is provided at the end of the magnetic pressure plate 221 near the electrode sheet.

[0036] Furthermore, considering that the field of view of a microscope lens used for detecting burrs on electrode cross-sections is typically limited and cannot completely cover the cross-section, the fixture needs to be moved multiple times during the inspection process, affecting lens focusing and inspection efficiency. In this embodiment, a movable adjustment component 3 is provided on the base 1, which is connected to the clamping component 2 and is used to drive the clamping component 2 to move horizontally and linearly relative to the base 1. Through the movable adjustment component 3, the position of the electrode cross-section in the lens's field of view can be easily adjusted, ensuring that the entire cross-section can be detected without repeatedly moving the fixture, thereby shortening the inspection time and improving inspection efficiency.

[0037] Specifically, the movable adjustment component 3 includes a slider 31 and a guide rail 32 connected to the base 1. The slider 31 is slidably positioned on the guide rail 32 and connected to the clamping component 2. An adjusting screw 33 is rotatably positioned on the base 1, and the slider 31 is provided with a screw nut adapted to connect to the adjusting screw 33. By rotating the adjusting screw 33 and cooperating with the screw nut, the horizontal linear movement distance of the slider 31 and the clamping component 2 can be precisely controlled. The sliding cooperation between the slider 31 and the guide rail 32 ensures the stability of the clamping component 2 during movement, helps maintain the focusing stability of the microscope inspection lens, reduces image blurring or distortion caused by movement, and improves inspection efficiency.

[0038] The adjusting screw 33 can be rotated manually or by other means. In this embodiment, one end of the adjusting screw 33 is connected to a motor, which is a servo motor. The adjusting screw 33 can be rotated by the motor, which can further adjust the horizontal linear movement speed of the electrode and improve the detection accuracy.

[0039] Example 2

[0040] refer to Figure 2 An electrode positioning fixture, which differs from the electrode positioning fixture shown in Embodiment 1 in that the implementation structure of "positioning body 21 cooperating with clamping structure 22 to form at least two clamping positions" has been adjusted.

[0041] Specifically, in this embodiment, the positioning body 21 has a positioning surface for the electrode sheet to abut in one direction. There is at least one positioning surface. The clamping structure 22 can cooperate with the positioning surface to clamp and position the electrode sheet. Furthermore, the positioning body 21 is connected to a flipping structure 23. The flipping structure 23 can rotate the positioning body 21 along a preset direction, thereby forming a first workstation and a second workstation. Through the above technical solution, there is no need for secondary loading and unloading of the clamped electrode sheet. By rotating the positioning body 21 along a preset direction using the flipping structure 23, the orientation of the electrode sheet's cross-section can be quickly modulated. This facilitates the rapid detection of transverse and longitudinal burrs on the electrode sheet's cross-section by the detection device, improving detection efficiency.

[0042] The following provides one embodiment of the flipping structure 23, which includes a flipping shaft 231 rotatably positioned on the base 1. A positioning body 21 is connected to the flipping shaft 231 and can rotate with the flipping shaft 231. The flipping shaft 231 can be driven to rotate manually or by an external drive structure. The external drive structure can be a servo motor or a cylinder rack and pinion mechanism, etc.

[0043] The second preferred embodiment of this utility model is: an electrode burr detection device, including a microscopic precision measuring lens and an electrode positioning fixture as in the first preferred embodiment, wherein the phase microscopic measuring lens of the electrode positioning fixture is arranged at a low position.

[0044] The above are only specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of this utility model are covered by the patent scope of this utility model.

Claims

1. A pole piece positioning tool characterized by: The application relates to a positioning tool for a pole piece, which comprises a base (1) and a clamping assembly (2) arranged on the base (1) and used for clamping the pole piece. The clamping assembly (2) comprises a positioning body (21) and a clamping structure (22). The positioning body (21) cooperates with the clamping structure (22) to form at least two clamping stations, i.e. a first station for clamping the pole piece with the section of the pole piece arranged in a longitudinal upward mode and a second station for clamping the pole piece with the section of the pole piece arranged in a horizontal transverse mode. The positioning body (21) is formed with a positioning surface for one-way abutting of the pole piece, and the clamping structure (22) can clamp and position the pole piece in cooperation with the positioning surface; the positioning surface at least comprises a first positioning surface (211) extending longitudinally and a second positioning surface (212) extending horizontally; the first station is formed on the first positioning surface (211), and the second station is formed on the second positioning surface (212). The positioning body (21) is connected with a turnover structure (23), and the positioning body (21) is formed with a positioning surface for one-way abutting of the pole piece; the clamping structure (22) can clamp and position the pole piece in cooperation with the positioning surface; the turnover structure (23) can drive the positioning body (21) to turn over along a preset direction, thereby forming the first station and the second station. The turnover structure (23) comprises a turnover shaft (231) which can be rotationally positioned on the base (1); the positioning body (21) is connected to the turnover shaft (231) and can rotate along with the turnover shaft (231); and the turnover shaft (231) can be driven to rotate by manual operation or an external driving structure.

2. The pole piece positioning tool of claim 1, wherein: A limiting strip (213) is arranged on the positioning body (21) and can abut against and limit one end of the pole piece away from the section.

3. The pole piece positioning tool of claim 1, wherein: The clamping structure (22) comprises a pull rod (222) which is rotationally connected to the positioning body (21) at one end; a magnetic pressing plate (221) is arranged on the pull rod (222) and used for magnetically adsorbing the positioning body (21) to clamp and position the pole piece.

4. The pole piece positioning tool of claim 3, wherein: A moving adjusting assembly (3) is arranged on the base (1) and connected to the clamping assembly (2) to drive the clamping assembly (2) to move linearly horizontally relative to the base (1).

5. The pole piece positioning tool of claim 1, wherein: The moving adjusting assembly (3) comprises a sliding block (31) and a guide rail (32) connected to the base (1); the sliding block (31) is slidably positioned on the guide rail (32) and connected to the clamping assembly (2); an adjusting lead screw (33) is rotationally positioned on the base (1); and a lead screw nut (not shown) is arranged on the sliding block (31) and adapted to be connected to the adjusting lead screw (33).

6. The pole piece positioning tool of claim 1, wherein: One end of the adjusting lead screw (33) is connected to a servo motor.

7. The pole piece positioning tooling of any one of claims 1-6, wherein: The application further relates to a microscope detection lens and the pole piece positioning tool as claimed in any one of claims 1 to 9, wherein the pole piece positioning tool is arranged at a low position relative to the microscope detection lens.

8. The pole piece positioning tool of claim 7, wherein: ​ 9. The pole piece positioning tool of claim 8, wherein: ​ 10. A pole piece burr detection device, characterized by: ​

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