Integrated detection equipment for surface density and thinning thickness of lithium electrode sheet

Abstract

The utility model discloses integrated detection equipment for surface density and thinning thickness of a lithium electrode sheet. The integrated detection equipment comprises a rack, the middle part of the rack is provided with a detection area through which a lithium battery pole piece passes; the lithium battery pole piece is conveyed from the detection area through the conveying roller group; a first detection mechanism for detecting the densities of the upper surface and the lower surface of the lithium battery pole piece is movably arranged on one side of the detection area of the rack; and the other side of the rack detection area is provided with a second detection mechanism for detecting and scanning the thickness of the lithium battery pole piece. The lithium battery pole piece detection device integrates the first detection mechanism used for surface density detection and the second detection mechanism used for edge thinning area thickness detection, realizes all-directional detection of the lithium battery pole piece, effectively improves the accuracy and comprehensiveness of detection, and ensures the consistency and reliability of the quality of the pole piece.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to an integrated detection device for lithium electrode sheet density and thinning thickness. Background Technology

[0002] In the production process of lithium-ion batteries, the coating surface density is a key indicator that directly affects the energy density and cycle life of the battery. Adding a thinning zone at the edge of the electrode during the coating process can effectively increase the surface area of ​​the active material in the battery electrode, reduce the impact of edge effects on the battery electrode, improve the electrochemical performance of the electrode, and thus improve the energy density and cycle life of the battery. Therefore, controlling the electrode surface density and the edge thinning zone is crucial.

[0003] In actual production, X-ray density measuring instruments are used to detect the surface density of the electrode coating area. However, due to the large radiation area of ​​X-rays, only the surface density of large areas can be detected, and it is impossible to accurately measure small areas such as thinned areas. Moreover, existing equipment occupies a lot of space and has high manufacturing costs. At the same time, because laser thickness gauges use a full-stroke back-and-forth scanning method, the detection frequency is low, the amount of data in the thinned area is relatively small, and it is difficult to improve the measurement accuracy.

[0004] Therefore, it is necessary to design an integrated detection device for lithium electrode sheet density and thinning thickness to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an integrated detection device for lithium electrode sheet density and thinning thickness.

[0006] The technical solution of this utility model is: a lithium electrode sheet surface density and thinning thickness integrated detection device, including a frame; the middle of the frame is provided with a detection area for lithium battery electrode sheets to pass through; the lithium battery electrode sheets are transferred from the detection area through a transfer roller group; a first detection mechanism for detecting the upper and lower surface density of the lithium battery electrode sheets is movably provided on one side of the frame detection area; a second detection mechanism for scanning the thickness of the lithium battery electrode sheets is provided on the other side of the frame detection area.

[0007] The frame includes a base; the base is provided with a lower base and an upper base; the two ends of the lower base are connected to the two ends of the upper base through columns.

[0008] The first detection mechanism includes two X-ray devices; the two X-ray devices are slidably connected to a lower base and an upper base respectively via guide rails; the lower base and the upper base are respectively provided with drive components for driving the movement of the X-ray devices.

[0009] The driving component is a lead screw motor; the bottom of the ray device is provided with a slide block that is threadedly connected to the lead screw of the lead screw motor; the slide block is slidably connected to the guide rail.

[0010] The transmission roller assembly includes a first measuring roller and a second measuring roller; both the first and second measuring rollers are provided in pairs; the first measuring roller is staggered vertically to tension the lithium battery electrode at the first detection mechanism; the second measuring roller is symmetrically arranged to tension the lithium battery electrode at the second detection mechanism; the first measuring roller located on the inner side and the second measuring roller located on the inner side are staggered vertically.

[0011] The second testing mechanism has two corresponding units, one on the top and one on the bottom, which are slidably connected to the upper and lower bases respectively via mounting brackets.

[0012] The second detection mechanism is a laser sensor.

[0013] It also includes a host computer and a PLC electrically connected to the host computer; both the first detection mechanism and the second detection mechanism are electrically connected to the host computer, and the first detection mechanism is also electrically connected to the PLC.

[0014] The present invention has the following beneficial effects by adopting the above technical solution: (1) The present invention integrates a first detection mechanism for surface density detection and a second detection mechanism for edge thinning area thickness detection, thereby realizing all-round detection of lithium battery electrode sheets, effectively improving the accuracy and comprehensiveness of detection, and ensuring the consistency and reliability of electrode sheet quality.

[0015] (2) The present invention, through the layered design of the frame, namely the base, the lower base and the upper base, and the column connection structure, not only ensures the stability and durability of the equipment, but also facilitates the installation and adjustment of various detection mechanisms and transmission components, providing a good hardware foundation for accurate detection.

[0016] (3) The first detection mechanism of this utility model adopts a ray device and achieves sliding connection through guide rail and drive assembly, which can flexibly adjust the detection position to meet the detection needs of lithium battery electrode sheets of different sizes and specifications, thereby improving the versatility and accuracy of detection.

[0017] (4) The design of the transmission roller group of this utility model, especially the staggered and symmetrical arrangement of the first measuring roller and the second measuring roller, ensures the stable transmission and tension of the lithium battery electrode during the detection process, reduces the detection error caused by unstable transmission, and improves the detection accuracy.

[0018] (5) The second detection mechanism of this utility model is provided in two corresponding positions, which can scan the thickness of the lithium battery electrode from both the top and bottom directions, further enhancing the accuracy and reliability of thickness detection and helping to detect problems such as uneven electrode thickness in a timely manner.

[0019] (6) By introducing a host computer and PLC control system, this utility model realizes intelligent management and data collection of the detection process, can monitor the detection data in real time, detect abnormalities in a timely manner and handle them, and facilitates subsequent data analysis and quality management, thereby improving overall production efficiency and product quality. Attached Figure Description

[0020] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] The labels in the attached diagram are:

[0024] Frame 1, base 1-1, lower base 1-2, upper base 1-3, transmission roller group 2, first measuring roller 2-1, second measuring roller 2-2, first detection mechanism 3, X-ray device 3-1, guide rail 3-2, drive assembly 3-3, second detection mechanism 4. Detailed Implementation

[0025] (Example 1)

[0026] See Figure 1 and Figure 2 This embodiment of a lithium electrode sheet surface density and thinning thickness integrated detection device includes a frame 1; the frame 1 has a detection area in the middle for the lithium battery electrode sheet to pass through; the lithium battery electrode sheet is transferred from the detection area through a transfer roller group 2; a first detection mechanism 3 for detecting the upper and lower surface density of the lithium battery electrode sheet is movably provided on one side of the detection area of ​​the frame 1; a second detection mechanism 4 for scanning to detect the thickness of the lithium battery electrode sheet is provided on the other side of the detection area of ​​the frame 1.

[0027] Furthermore, the frame 1 includes a base 1-1; the base 1-1 is provided with a lower base 1-2 and an upper base 1-3; the two ends of the lower base 1-2 are connected to the two ends of the upper base 1-3 through columns.

[0028] Furthermore, the first detection mechanism 3 includes two X-ray devices 3-1; the X-ray devices 3-1 adopt common devices for measuring the density of lithium battery surfaces, which will not be described in detail here; the two X-ray devices 3-1 are slidably connected to the lower base 1-2 and the upper base 1-3 respectively via guide rails 3-2; the lower base 1-2 and the upper base 1-3 are respectively provided with drive components 3-3 for driving the movement of the X-ray devices 3-1.

[0029] Furthermore, the drive assembly 3-3 is a lead screw motor; the bottom of the ray device 3-1 is provided with a slide block that is threadedly connected to the lead screw of the lead screw motor; the slide block is slidably connected to the guide rail 3-2.

[0030] Furthermore, the transmission roller group 2 includes a first measuring roller 2-1 and a second measuring roller 2-2; both the first measuring roller 2-1 and the second measuring roller 2-2 are provided in pairs; the first measuring roller 2-1 is staggered vertically to tension the lithium battery electrode at the first detection mechanism 3; the second measuring roller 2-2 is symmetrically arranged to tension the lithium battery electrode at the second detection mechanism 4; the first measuring roller 2-1 located on the inner side and the second measuring roller 2-2 located on the inner side are staggered vertically.

[0031] Furthermore, the second testing mechanism 4 has two corresponding units, which are slidably connected to the upper base 1-3 and the lower base 1-2 via mounting brackets. The two mounting brackets can be synchronously driven by various driving methods, such as screw motors, cylinders, and electric slides.

[0032] Furthermore, the second detection mechanism 4 is a laser sensor.

[0033] Furthermore, the lithium electrode sheet density and thinning thickness integrated detection equipment of this embodiment also includes a host computer and a PLC electrically connected to the host computer; the first detection mechanism 3 and the second detection mechanism 4 are both electrically connected to the host computer, and the first detection mechanism 3 is also electrically connected to the PLC.

[0034] The lithium electrode sheet density and thinning thickness integrated detection device of this embodiment also includes a host computer and a PLC electrically connected to the host computer; the first detection mechanism 3 and the second detection mechanism 4 are both electrically connected to the host computer, and the first detection mechanism 3 is also electrically connected to the PLC. The host computer is equipped with recipe setting, saving and recall functions, which can quickly recall and measure different specifications and models with one click, making the operation simple and convenient; the human-machine interface displays the measurement curve and data in real time, making the measurement results more intuitive, and the measurement data is saved for easy traceability; the device has an over-limit audible and visual alarm function, which reminds the operator to intervene manually when the detection exceeds the limit; it is configured with a third-party interface to support data synchronous upload to the MES system.

[0035] The lithium electrode sheet surface density and thinning thickness integrated detection equipment of this embodiment shows significant benefits in terms of improving detection accuracy, enhancing flexibility, increasing detection efficiency, realizing intelligent control, and facilitating maintenance and adjustment, providing strong support for the production quality control of lithium battery electrode sheets.

[0036] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lithium electrode sheet surface density and thinning thickness integrated detection device, characterized by: Including frame (1), the middle part of frame (1) is equipped with detection area for lithium battery pole piece, lithium battery pole piece is transmitted from detection area by transmission roller group (2), first detection mechanism (3) for detecting the density of upper and lower surfaces of lithium battery pole piece is movably arranged on one side of detection area of frame (1), the other side of detection area of frame (1) is equipped with second detection mechanism (4) for detecting the thickness of lithium battery pole piece and scanning.

2. The lithium electrode sheet surface density and thinning thickness integrated detection device according to claim 1, characterized in that: The frame (1) comprises a base (1-1); the base (1-1) is provided with a lower base (1-2) and an upper base (1-3); the two ends of the lower base (1-2) are connected to the two ends of the upper base (1-3) through a stand.

3. The device according to claim 2, wherein: the device is configured to detect the surface density and the thickness of the lithium electrode sheet simultaneously. The first detection mechanism (3) comprises two radiation devices (3-1); the two radiation devices (3-1) are respectively slidably connected to the lower base (1-2) and the upper base (1-3) through guide rails (3-2); the lower base (1-2) and the upper base (1-3) are respectively provided with a driving assembly (3-3) for driving the radiation device (3-1) to move.

4. The lithium electrode sheet surface density and shaving thickness integrated detection device according to claim 3, characterized in that: The driving assembly (3-3) is a lead screw motor; the bottom of the radiation device (3-1) is provided with a sliding seat threadedly connected with the lead screw of the lead screw motor; the sliding seat is slidably connected to the guide rail (3-2).

5. The device according to claim 1, wherein: the device is characterized by the following features. The transmission roller group (2) comprises first measuring rollers (2-1) and second measuring rollers (2-2); the first measuring rollers (2-1) and the second measuring rollers (2-2) are both provided with two; the first measuring rollers (2-1) are arranged in an upper and lower staggered manner, for tensioning the lithium battery pole piece at the first detection mechanism (3); the second measuring rollers (2-2) are symmetrically arranged, for tensioning the lithium battery pole at the second detection mechanism (4); the first measuring rollers (2-1) on the inner side and the second measuring rollers (2-2) on the inner side are arranged in an upper and lower staggered manner.

6. The device according to claim 2, wherein: The second detection mechanism (4) is provided with two corresponding upper and lower, respectively slidably connected to the upper base (1-3) and the lower base (1-2) through a mounting bracket.

7. The device according to claim 6, wherein: The second detection mechanism is a laser sensor.

8. The device according to claim 1, wherein: It also includes an upper computer and a PLC electrically connected to the upper computer; the first detection mechanism (3) and the second detection mechanism (4) are electrically connected to the upper computer, and the first detection mechanism (3) is also electrically connected to the PLC.

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