A detection system for ultrathin lithium ribbons

Abstract

The utility model discloses a kind of detection systems of ultrathin lithium strip, applied to material detection technical field, comprising: mounting plate, lithium strip unwinding mechanism, lithium strip winding mechanism, further comprising: along the direction of ultrathin lithium strip strip, sequentially set, and fixed on the online thickness measuring mechanism of mounting plate, surface quality detection mechanism, marking mechanism and integrated feedback mechanism.The utility model effectively improves the detection capability of ultrathin lithium strip product size and surface quality, and lays foundation for improving the precision of ultrathin lithium strip product size and appearance quality.

Description

Technical Field

[0001] This utility model relates to the field of materials testing technology, and more specifically to a testing system for ultrathin lithium strips. Background Technology

[0002] With the rapid development of lithium-ion / lithium metal battery technology, ultrathin lithium strips and their composite strips have become a research hotspot. To further reduce battery production costs, the production efficiency of ultrathin lithium strips and their composite strips is also gradually improving. Currently, the main production processes for ultrathin lithium strips are extrusion, calendering, and lamination, with production speeds exceeding 40 m / min. Visual inspection methods are no longer sufficient to meet the testing requirements of ultrathin lithium strip products. Furthermore, cold-processing technologies such as extrusion, calendering, and lamination make it difficult to precisely control the dimensional tolerances of lithium strips when processing soft materials like lithium strips, which have low hardness. Surface defects during processing are also difficult to monitor, severely hindering the improvement of lithium strip product quality.

[0003] Therefore, how to provide a detection system for ultra-thin lithium strips to improve the detection capabilities of the dimensions and surface quality of ultra-thin lithium strip products, and lay the foundation for improving the dimensional accuracy and appearance quality of ultra-thin lithium strip products, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a detection system for ultrathin lithium strip.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An inspection system for ultra-thin lithium strip includes: a mounting plate, a lithium strip unwinding mechanism, and a lithium strip winding mechanism; it also includes: an online thickness measuring mechanism, a surface quality inspection mechanism, a marking mechanism, and an integrated feedback mechanism, which are sequentially arranged along the ultra-thin lithium strip's travel direction and fixed to the mounting plate.

[0006] Optionally, the online thickness measurement mechanism consists of an upper sensor and a lower sensor symmetrically arranged along the ultra-thin lithium strip, used to emit and receive laser signals to the ultra-thin lithium strip.

[0007] Optionally, a smoothing roller parallel to the vertical direction is also provided between the lithium strip unwinding mechanism and the online thickness measuring mechanism. The smoothing roller is divided into upper and lower rollers. The upper roller is a silicone roller that is completely in contact with the surface of the ultra-thin lithium strip, and the lower roller is a acetal roller that is used to support the ultra-thin lithium strip.

[0008] Optionally, bearing housings are connected to both ends of the smoothing roller, and the bearing housings are connected to the base plate by springs, which are used to adjust the gap between the ultra-thin lithium strip and the smoothing roller by springs.

[0009] Optionally, the acetal roller is connected to a speed-regulating motor and a magnetic powder clutch to control the feeding speed of the ultra-thin lithium strip and to coordinate with the tension adjustment of the lithium strip winding and unwinding mechanisms.

[0010] Optionally, the lithium strip winding mechanism is connected to a speed-regulating motor and a magnetic powder clutch to control the winding speed of the ultra-thin lithium strip to be synchronized with the belt travel speed of the ultra-thin lithium strip, and to adjust the winding tension of the ultra-thin lithium strip; the lithium strip unwinding mechanism is connected to a magnetic powder clutch to adjust the unwinding tension of the ultra-thin lithium strip.

[0011] Optionally, the surface quality inspection mechanism consists of an upper photosensitive unit and a lower photosensitive unit, used to scan the surface light source of the ultrathin lithium strip at an adjustable frequency.

[0012] Optionally, the marking mechanism includes a laser generator, with the laser generator's emitting surface parallel to the ultra-thin lithium strip.

[0013] Optionally, the integrated feedback mechanism consists of internal control components, which are used to receive surface thickness defects and surface quality defects signals sent by the online thickness measurement mechanism and the surface quality inspection mechanism, and to control the rotation speed of the acetal roller to change the winding and unwinding speed of the ultra-thin lithium strip, and control the marking mechanism to apply the corresponding marks.

[0014] Optionally, it also includes a protective film unwinding mechanism and a protective film winding mechanism, both of which consist of a hand-operated expansion shaft, a magnetic powder clutch, and a high-speed motor, used to fix the ultra-thin lithium strip.

[0015] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a detection system for ultra-thin lithium strips, which achieves the following beneficial effects: (1) Magnetic powder clutches are provided on both the winding and unwinding mechanisms, which can maintain micro-tension of the ultra-thin lithium strip during the conveying process, ensuring that the ultra-thin lithium strip is not torn or deformed, and enabling the detection of ultra-thin lithium strips of different thicknesses and strengths.

[0016] (2) Based on the light source signals emitted and received by the upper and lower sensors of the online thickness measuring mechanism, the light source signals are calculated by the integrated feedback mechanism, which can eliminate the influence of the up and down shaking of the ultra-thin lithium strip and realize the accurate measurement of the ultra-thin lithium strip.

[0017] (3) By scanning the surface of the ultrathin lithium strip with two scanning cameras on the upper and lower sides of the surface inspection mechanism and by calculating and processing the integrated feedback mechanism, the width of the ultrathin lithium strip and the identification of surface defects of the ultrathin lithium strip are realized; by identifying the surface quality defect signal of the ultrathin lithium strip with the marking mechanism, the laser generator can distinguish and mark different defects.

[0018] (4) By processing and analyzing information through the integrated feedback system, it is possible to control the speed reduction or even stop of defective ultra-thin lithium strip by controlling the acetal roller and components; and to control the marking mechanism and components to mark defective ultra-thin lithium strip, thereby achieving overall control of ultra-thin lithium strip.

[0019] (5) The detection system for ultra-thin lithium strip of this utility model can be used as a standalone detection platform to detect the size and surface quality of ultra-thin lithium strip products and complete the winding and unwinding of the products; it can also be used as an online detection system for ultra-thin lithium strip production machine to monitor the production process of ultra-thin lithium strip products and ensure the quality of ultra-thin lithium strip products. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A schematic diagram of the system structure provided by this utility model.

[0022] Among them, 1-mounting plate, 2-lithium strip unwinding mechanism, 3-smoothing roller, 4-upper sensor, 5-lower sensor, 6-upper photosensitive unit, 7-lower photosensitive unit, 8-marking mechanism, 9-lithium strip winding mechanism, 10-protective film unwinding mechanism, 11-protective film winding mechanism, 12-protective film, 13-ultra-thin lithium strip, 14-integrated feedback mechanism. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Embodiment 1 of this utility model discloses a detection system for ultrathin lithium strips, such as... Figure 1 As shown, it includes: mounting plate 1, lithium strip unwinding mechanism 2, lithium strip winding mechanism 9, and also includes: online thickness measuring mechanism, surface quality inspection mechanism, marking mechanism 8 and integrated feedback mechanism 14, which are arranged sequentially along the belt travel direction of ultra-thin lithium strip 13 and fixed on mounting plate 1.

[0025] Mounting plate 1 is generally made of aluminum or steel, which can support the surface structure, is not easily worn or oxidized, and has a flat surface.

[0026] The online thickness measurement mechanism consists of an upper sensor 4 and a lower sensor 5 symmetrically arranged along the ultra-thin lithium strip 13, used to emit and receive laser signals to and from the ultra-thin lithium strip 13. The sensors have multiple built-in probes, enabling multi-point measurement, and the sensor length generally needs to be greater than the length of the roller. When the ultra-thin lithium strip 13 passes through, the multi-point probe data is transmitted to the integrated feedback mechanism 14 to achieve the thickness measurement effect and eliminate the influence of the vertical vibration of the ultra-thin lithium strip 13.

[0027] A smoothing roller 3, which runs parallel to the vertical direction, is also provided between the lithium strip unwinding mechanism 2 and the online thickness measuring mechanism. The smoothing roller 3 is divided into upper and lower rollers. The upper roller is a silicone roller, which is made of silicone and is soft. It is completely in contact with the surface of the ultra-thin lithium strip 13 and plays a smoothing role, as well as a role in uniformly conveying the ultra-thin lithium strip 13. The lower roller is a acetal roller, which has medium hardness and a smooth surface and is used to support the ultra-thin lithium strip 13.

[0028] The smoothing roller 3 is connected to bearing seats at both ends. The bearing seats are connected to the base plate by springs, which are used to adjust the gap between the ultra-thin lithium strip 13 and the smoothing roller 3 by springs.

[0029] The acetal roller is connected to a speed-regulating motor and a magnetic powder clutch to control the belt speed of the ultra-thin lithium strip 13, and to coordinate with the tension adjustment of the lithium strip winding mechanism 9 and the lithium strip unwinding mechanism 2.

[0030] The lithium strip winding mechanism 9 is connected to a speed-regulating motor and a magnetic powder clutch, which is used to control the winding speed of the ultra-thin lithium strip 13 to be synchronized with the belt travel speed of the ultra-thin lithium strip 13, and to adjust the winding tension of the ultra-thin lithium strip 13; the lithium strip unwinding mechanism 2 is connected to a magnetic powder clutch, which is used to adjust the unwinding tension of the ultra-thin lithium strip 13.

[0031] The surface quality inspection mechanism consists of an upper photosensitive unit 4 and a lower photosensitive unit 7, used to scan the surface light source of the ultrathin lithium strip 13 at an adjustable frequency. Each photosensitive unit incorporates multiple photodiodes and sensing points. The photodiodes provide ample light, and the sensing points collect reflected light information from the surface of the ultrathin lithium strip 13, transmitting it to the integrated feedback mechanism 14 to achieve accurate measurement of the width of the ultrathin lithium strip 13 and identification of surface defects.

[0032] The marking mechanism 8 contains a laser generator, the emitting surface of which is parallel to the ultra-thin lithium strip 13. Below the emitter is a protective cover with its opening facing the ultra-thin lithium strip 13. The emitter is generally a light source mechanism that can emit light of different frequencies and different shapes and patterns to classify and mark defects in the ultra-thin lithium strip 13.

[0033] The integrated feedback mechanism 14 consists of internal control components, which are used to receive surface thickness defects and surface quality defects signals sent by the online thickness measurement mechanism and the surface quality inspection mechanism (by collecting the light-sensing signal and wavelength signal of the ultra-thin lithium strip 13, and performing information processing and judgment), and control the marking mechanism 8 to mark the corresponding marks by controlling the rotation speed of the acetal roller to change the winding and unwinding speed of the ultra-thin lithium strip 13.

[0034] It also includes a protective film unwinding mechanism 10 and a protective film winding mechanism 11, both of which are composed of a hand-expanding shaft, a magnetic powder clutch and a speed motor, used to fix the ultra-thin lithium strip through the protective film 12.

[0035] The working principle of this utility model is as follows: When the surface inspection mechanism detects surface quality defects in the ultra-thin lithium strip 13, it sends a signal to the control components of the marking mechanism 8 and the control components of the acetal roller through the integrated feedback mechanism 14. This controls the laser generator of the marking mechanism 8 to emit laser light and controls the rotation speed of the acetal roller, thereby marking the defects on the ultra-thin lithium strip 13 and changing the winding and unwinding speed of the ultra-thin lithium strip 13, or even stopping the machine. When the online thickness measuring mechanism detects poor surface thickness of the ultra-thin lithium strip 13, it sends a signal to the control components of the marking mechanism 8 and the control components of the acetal roller through the integrated feedback mechanism 14. This controls the laser generator of the marking mechanism 8 to emit laser light and controls the rotation speed of the acetal roller, thereby marking the defects on the ultra-thin lithium strip 13 and stopping the machine.

[0036] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A detection system for ultrathin lithium strip, comprising: Mounting plate (1), lithium strip unwinding mechanism (2), lithium strip winding mechanism (9), characterized in that it further includes: an online thickness measuring mechanism, a surface quality inspection mechanism, a marking mechanism (8) and an integrated feedback mechanism (14) arranged sequentially along the belt-running direction of the ultra-thin lithium strip (13) and fixed on the mounting plate (1).

2. The detection system for ultrathin lithium strips according to claim 1, characterized in that, The online thickness measurement mechanism consists of an upper sensor (4) and a lower sensor (5) symmetrically arranged along the ultra-thin lithium strip (13), and is used to transmit and receive laser signals to the ultra-thin lithium strip (13).

3. The detection system for ultrathin lithium strips according to claim 1, characterized in that, A smoothing roller (3) parallel to the vertical direction is also provided between the lithium strip unwinding mechanism (2) and the online thickness measuring mechanism. The smoothing roller (3) is divided into upper and lower rollers. The upper roller is a silicone roller that is completely in contact with the surface of the ultra-thin lithium strip (13). The lower roller is a acetal roller that is used to support the ultra-thin lithium strip (13).

4. The detection system for ultrathin lithium strips according to claim 3, characterized in that, The smoothing roller (3) is connected to bearing seats at both ends. The bearing seats are connected to the base plate by springs and are used to adjust the gap between the ultra-thin lithium strip (13) and the smoothing roller (3) by springs.

5. The detection system for ultrathin lithium strips according to claim 3, characterized in that, The acetal roller is connected to a speed-regulating motor and a magnetic powder clutch, which are used to control the belt speed of the ultra-thin lithium strip (13) and to coordinate with the tension adjustment of the lithium strip winding mechanism (9) and the lithium strip unwinding mechanism (2).

6. The detection system for ultrathin lithium strip according to claim 5, characterized in that, The lithium strip winding mechanism (9) is connected to a speed regulating motor and a magnetic powder clutch, which is used to control the winding speed of the ultra-thin lithium strip (13) to be synchronized with the belt running speed of the ultra-thin lithium strip (13), and to adjust the winding tension of the ultra-thin lithium strip (13); the lithium strip unwinding mechanism (2) is connected to a magnetic powder clutch, which is used to adjust the unwinding tension of the ultra-thin lithium strip (13).

7. The detection system for ultrathin lithium strips according to claim 1, characterized in that, The surface quality inspection mechanism consists of an upper photosensitive unit (6) and a lower photosensitive unit (7), which is used to scan the surface light source of the ultrathin lithium strip (13) by means of adjustable frequency.

8. The detection system for ultrathin lithium strip according to claim 1, characterized in that, The marking mechanism (8) contains a laser generator, and the emitting surface of the laser generator is parallel to the ultra-thin lithium strip (13).

9. The detection system for ultrathin lithium strip according to claim 6, characterized in that, The integrated feedback mechanism (14) is composed of an internal control component, which is used to receive the surface thickness defect and surface quality defect signals sent by the online thickness measurement mechanism and the surface quality inspection mechanism, and to control the marking mechanism (8) to mark the corresponding marks by controlling the rotation speed of the acetal roller to change the winding and unwinding speed of the ultra-thin lithium strip (13).

10. The detection system for ultrathin lithium strips according to claim 1, characterized in that, Also includes: The protective film unwinding mechanism (10) and the protective film winding mechanism (11) are both composed of a hand-expanding shaft, a magnetic powder clutch and a speed motor, and are used to fix the ultra-thin lithium strip (13).

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