Device for detecting bending degree of pole piece

Abstract

The utility model discloses a device for detecting the bending degree of a pole piece. The device comprises a measuring platform, the guide roller assemblies are arranged at the end parts of the two sides of the measuring platform; the limiting assemblies are arranged on the two side edges of the measuring platform; the measurement sensing device is arranged at the top of the measurement platform; the pole pieces are guided into the measuring platform through the guide roller assembly, the limiting device is used for being matched with the pole pieces of different specifications, and the bending degree of the pole pieces is measured in cooperation with the measuring and sensing device. According to the utility model, manual measurement is replaced by the automatic detection device, detection personnel can independently complete measurement, and the efficiency is high; the detection precision is high, and the reproducibility is high; the device is suitable for detection of pole pieces with different specifications and sizes and different widths.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery detection devices, in particular to a detection device for the curvature of a pole piece. Background Art

[0002] As a representative new energy product, lithium batteries are increasingly used in consumer electronics, electric vehicles, energy storage, and other fields due to their excellent performance, especially their high energy density, high cycle life, safety, and environmental friendliness. In the production of wound lithium batteries, the curvature of the positive and negative electrodes significantly affects the winding and coating process. Therefore, the curvature of the electrodes must be controlled during mass production. However, the currently commonly used detection method involves measuring the bending deformation at the point of maximum deformation along the length of the electrode using a long scale. This is not only slow but also subject to significant measurement errors.

[0003] Patent CN209623589U discloses a device for measuring the curvature of a pole piece, comprising two perpendicular surfaces, A and B. Each surface has a scale, Scale 1 and Scale 2, with an accuracy of 0.5mm. Beneficial effects: The device is made of a white rigid PVC board with a scale marked with an accuracy of 0.5mm. During testing, the pole piece is placed on the B surface, with one side of the pole piece close to the A surface, and visually inspected to ensure there is no gap between the pole piece and the A surface. The data on the scale on the B surface is read as the pole piece curvature. Manual measurement and reading are required, which is subject to errors, inefficiency, and poor repeatability. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art. To achieve the above purpose, a device for detecting the curvature of a pole piece is used to solve the problems raised in the above background technology.

[0005] A device for detecting the curvature of a pole piece, comprising:

[0006] Measuring platform;

[0007] Guide roller assemblies arranged at both ends of the measuring platform;

[0008] Limiting components provided on both sides of the measuring platform; and

[0009] A measuring sensor device provided on top of the measuring platform;

[0010] The pole piece is introduced into the measuring platform through the guide roller assembly, and the limiting device is used to adapt to pole pieces of different specifications, and then the curvature of the pole piece is measured in conjunction with the measuring sensing device.

[0011] As a further solution of the present invention, the guide roller assembly includes a first guide roller disposed at the pole piece inlet end, a second guide roller disposed at the measuring platform inlet end, and a third guide roller disposed at the measuring platform outlet end. This design ensures that the pole piece is stably guided and supported throughout the measurement process, reducing measurement errors.

[0012] As a further solution of the present invention, the limiting assembly includes a first limiting rod disposed on the side of the measuring platform and a second limiting rod disposed parallel to the first limiting rod. The parallel arrangement of the two limiting rods can more stably fix the pole piece, preventing it from shaking or shifting during measurement.

[0013] As a further solution of the present invention, a slide rail assembly is provided between the position limiting assembly and the measuring platform. The slide rail assembly enables the position limiting assembly to be flexibly adjusted according to the specifications of the pole piece, thereby improving the versatility and flexibility of the device.

[0014] As a further solution of the present invention, the slide rail assembly includes a first slide rail and a second slide rail arranged parallel to the first slide rail. The parallel arrangement of the two slide rails ensures the stability and accuracy of the limit assembly during the adjustment process.

[0015] As a further embodiment of the present invention, the measuring sensor device includes a lifting rod mounted on the measuring platform, and a high-precision sensing device mounted at the end of the lifting rod. Adjustment of the lifting rod allows the high-precision sensing device to more precisely contact the electrode surface, thereby enabling more accurate curvature measurements.

[0016] As a further solution of the present invention, the lifting rod is an L-shaped structure. The L-shaped lifting rod is not only structurally stable, but also can more flexibly adjust the position of the high-precision sensing device to accommodate pole pieces of different specifications and shapes.

[0017] As a further solution of the present invention, a winding device is provided at the extended end of the measuring platform, which can conveniently collect and organize the pole pieces after measurement, thereby improving production efficiency and operation convenience.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] The above-mentioned technical solution is adopted to replace the traditional manual measurement method with an automatic detection device, which includes four core parts: a measuring platform, a guide roller assembly, a limit assembly and a measuring sensing device. The measuring platform serves as the foundation of the entire system and provides a stable working environment. Guide roller assemblies are installed on both sides of the measuring platform to smoothly guide the pole piece to be measured into the measuring platform. In order to adapt to pole pieces of different specifications, limit assemblies are set on both sides of the measuring platform, which can be adjusted according to the size of the pole piece to ensure that the pole piece will not shift during the measurement process. Finally, a high-precision measuring sensing device is installed on the top of the measuring platform to measure the curvature of the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following describes the specific implementation of the present invention in detail with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic structural diagram of a detection device according to an embodiment disclosed in this application;

[0022] Figure 2 A schematic diagram of a pole piece and a first limiting rod being tangent to each other according to an embodiment disclosed in the present application;

[0023] Figure 3 A schematic diagram of a pole piece and a second limiting rod being tangent to each other according to an embodiment disclosed in the present application;

[0024] Figure 4 This is a schematic diagram of the pole piece of the embodiment disclosed in this application when the curvature is too large.

[0025] In the figure: 1. Pole piece; 2. Guide roller assembly; 21. First guide roller; 22. Second guide roller; 23. Third guide roller; 3. Limit assembly; 31. First limit rod; 32. Second limit rod; 4. Slide rail assembly; 41. First slide rail; 42. Second slide rail; 5. Measuring platform; 6. Lifting rod; 7. High-precision sensing device; 8. Winding device. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Please refer to Figure 1 In an embodiment of the present invention, a device for detecting the curvature of a pole piece includes:

[0028] Measuring platform 5;

[0029] Guide roller assemblies 2 are provided at both ends of the measuring platform 5;

[0030] Limiting components 3 provided on both sides of the measuring platform 5; and

[0031] A measuring sensor device is provided on top of the measuring platform 5;

[0032] The pole piece 1 is introduced into the measuring platform 5 through the guide roller assembly 2 , and the limiting device is used to adapt to pole pieces 1 of different specifications, and then the curvature of the pole piece 1 is measured in conjunction with the measuring sensing device.

[0033] Specifically, positive and negative electrode sheets 1 of different specifications and sizes can be measured according to actual tests.

[0034] In this embodiment, the guide roller assembly 2 includes a first guide roller 21 arranged at the inlet end of the pole piece 1, a second guide roller 22 arranged at the inlet end of the measuring platform 5, and a third guide roller 23 arranged at the outlet end of the measuring platform 5. The pole piece 1 passes through the guide rollers in sequence and is connected to the winding device 8.

[0035] The first guide roller 21 is fixed to the lower left of the measuring platform 5 and serves to guide the pole piece 1. Specifically, the unwinding platform is located on the left side of the first guide roller 21. The second guide roller 22 is located above the first guide roller 21 and is flush with the measuring platform 5. The third guide roller 23 is located on the right side of the table. The pole piece 1 passes through the outside of the second and third guide rollers 23 and is laid flat on the measuring platform 5.

[0036] In this embodiment, the limiting assembly 3 includes a first limiting rod 31 provided on a side of the measuring platform 5 , and a second limiting rod 32 provided parallel to the first limiting rod 31 .

[0037] In this embodiment, a slide rail assembly 4 is provided between the limit assembly 3 and the measuring platform 5 .

[0038] In this embodiment, the slide rail assembly 4 includes a first slide rail 41 and a second slide rail 42 disposed parallel to the first slide rail 41 .

[0039] Specifically, the first limiting rod 31 and the second limiting rod 32 can move left and right on the slide rail assembly 4, and the slide rail assembly 4 is fixed parallel to the measuring platform 5;

[0040] In this embodiment, the measuring sensing device includes a lifting rod 6 disposed on the measuring platform 5 and a high-precision sensing device 7 disposed at the end of the lifting rod 6 .

[0041] In this embodiment, the lifting rod 6 is an L-shaped structure.

[0042] In this embodiment, a winding device 8 is provided at the extended end of the measuring platform 5 .

[0043] like Figure 2As shown, the figure is a schematic diagram of the pole piece 1 being tangent to the first limiting rod 31;

[0044] like Figure 3 As shown, the figure is a schematic diagram of the pole piece 1 being tangent to the second limiting rod 32;

[0045] In the figure, the pole piece 1 passes through the guide rail in turn and is laid flat on the measuring platform 5. By moving the limit rod, one side of the limit rod is tangent to the pole piece 1, and the other side intersects with the bending and sagging point of the pole piece 1, as shown in FIG. Figure 2 、 Figure 3 As shown, by moving the height of the lifting rod 6, the widths L1 and L2 in the figure are measured respectively using a high-precision sensor, where L1 is the distance between the two limit rods and L2 is the width of the measured pole piece 1; the difference between L1 and L2 is calculated to obtain the curvature of the measured pole piece 1.

[0046] like Figure 4 As shown, the figure is a schematic diagram when the curvature of the pole piece 1 is too large.

[0047] In the figure, when the curvature of the pole piece 1 is too large, a Figure 4 In the case shown, L1 and L2 remain unchanged and still represent the distance between the two limit rods and the width of the pole piece 1. L3 is the distance between the pole piece 1 and the tangent limit rod. The measured curvature of the pole piece 1 is:

[0048] Curvature = L1-L2+L3;

[0049] Beneficial effects:

[0050] Improved measurement accuracy: Guided by the guide roller assembly 2, the pole piece 1 can enter the measuring platform 5 smoothly and accurately, avoiding measurement errors caused by improper introduction. At the same time, the flexible adjustment of the limit assembly 3 ensures that pole pieces 1 of different specifications can remain stable during measurement, further improving measurement accuracy.

[0051] Enhanced system flexibility: The adjustability of the limit assembly 3 enables the measurement system to adapt to pole pieces 1 of various specifications without replacing or adjusting the measurement platform 5 itself, which greatly improves the flexibility and versatility of the system.

[0052] Improve measurement efficiency: The setting of the measuring sensing device enables the curvature of the pole piece 1 to be measured in real time and accurately, which greatly shortens the measurement time and improves the overall production efficiency.

[0053] Optimized operation process: The design of the entire measurement system is concise and clear, and the operation process is simple and easy to understand, which reduces the difficulty of operation and improves work efficiency.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

[0055] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for detecting the curvature of a pole piece, characterized in that: include: Measuring platform (5); Guide roller assemblies (2) are arranged at both ends of the measuring platform; Limiting components (3) arranged on both sides of the measuring platform; and A measuring sensor device provided on top of the measuring platform; The pole piece is introduced into the measuring platform through the guide roller assembly, and the limiting device is used to adapt to pole pieces of different specifications, and then the curvature of the pole piece is measured in conjunction with the measuring sensing device.

2. A device for detecting the curvature of a pole piece according to claim 1, characterized in that: The guide roller assembly (2) comprises a first guide roller (21) arranged at the pole piece inlet end, a second guide roller (22) arranged at the measuring platform inlet end, and a third guide roller (23) arranged at the measuring platform outlet end.

3. A device for detecting the curvature of a pole piece according to claim 2, characterized in that: The limiting assembly (3) comprises a first limiting rod (31) arranged on the side of the measuring platform, and a second limiting rod (32) arranged parallel to the first limiting rod.

4. A device for detecting the curvature of a pole piece according to claim 3, characterized in that: A slide rail assembly (4) is provided between the position limiting assembly and the measuring platform.

5. The device for detecting the curvature of a pole piece according to claim 4, characterized in that: The slide rail assembly comprises a first slide rail (41) and a second slide rail (42) arranged parallel to the first slide rail.

6. A device for detecting the curvature of a pole piece according to claim 5, characterized in that: The measuring induction device comprises a lifting rod (6) arranged on the measuring platform, and a high-precision induction device (7) arranged at the end of the lifting rod.

7. A device for detecting the curvature of a pole piece according to claim 6, characterized in that: The lifting rod is an L-shaped structure.

8. The device for detecting the curvature of a pole piece according to claim 6, characterized in that: The extended end of the measuring platform is provided with a winding device (8).

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