Measuring piece, coating machine and battery production line

Abstract

The utility model relates to a measuring piece, a coating machine and a battery production line. The measuring piece is applied to metal film thickness measurement and comprises a measuring shaft and a supporting structure. The measuring shaft is rotatably arranged on the supporting structure, a plurality of conducting rings are arranged on the measuring shaft at intervals in the length direction of the measuring shaft, and the conducting rings can be electrically connected with the measuring circuit. The measuring piece provided by the utility model is low in measuring cost, high in measuring precision, stable in measuring result and suitable for mass production.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, and more specifically, to a measuring piece, a coating machine and a battery production line. Background Art

[0002] In battery production, it is usually necessary to produce a metal film or a composite film plated with a metal layer. When the metal film or composite film is used in production, it is often necessary to detect the thickness of the metal film or the thickness of the metal layer on the composite film.

[0003] The detection methods in the prior art are usually implemented by OD (Optical Density) measurement or eddy current thickness measurement, which are costly and not convenient for mass production. Utility Model Content

[0004] One object of the present invention is to provide a new technical solution for a measuring piece, a coating machine and a battery production line, so as to at least solve one of the problems of the background technology.

[0005] According to a first aspect of the present invention, a measuring device is provided for measuring the thickness of a metal film, comprising:

[0006] Measuring shafts and supporting structures;

[0007] The measuring shaft is rotatably arranged on the supporting structure. A plurality of conductive rings are arranged on the measuring shaft at intervals along the length direction thereof. The plurality of conductive rings can be electrically connected to the measuring circuit respectively.

[0008] Optionally, the measuring shaft is a hollow structure, and the plurality of conductive rings are respectively led out from the hollow structure to one end of the measuring shaft through wires.

[0009] Optionally, it further comprises an electric slip ring connected to one end of the measuring shaft;

[0010] The electric slip ring is provided with a plurality of electrical connection points, and the plurality of conductive rings are connected to the connection points in a one-to-one correspondence, and the plurality of connection points can be electrically connected to the measurement circuit respectively.

[0011] Optionally, the supporting structure includes two bearing seats, and both ends of the measuring shaft are rotatably disposed on the two bearing seats through bearings.

[0012] Optionally, the plurality of conductive rings are equidistantly arranged along the length direction of the measuring axis.

[0013] Optionally, the plurality of conductive rings are arranged at unequal intervals along the length direction of the measuring axis according to an arithmetic progression or a geometric progression.

[0014] Optionally, an insulating ring is sandwiched between two adjacent conductive rings.

[0015] Optionally, it further includes a measuring circuit, any two of the plurality of conductive rings are respectively connected to the measuring circuit, and the measuring circuit is used to measure the resistance or current between any two of the conductive rings.

[0016] According to a second aspect of the present invention, a coating machine is provided, comprising: the measuring piece described in the first aspect.

[0017] According to a third aspect of the present invention, a battery production line is provided, comprising: the measuring piece described in the first aspect; or, the coating machine described in the second aspect.

[0018] One technical effect of the present invention is that, by arranging a plurality of spaced conductive rings on the measuring shaft, and each conductive ring can be electrically connected to the measuring circuit, when the metal film contacts the measuring shaft, the metal film can be connected to the measuring circuit through any two conductive rings, and then the thickness of the metal film between the corresponding two conductive rings can be calculated through the measurement parameters of the measuring circuit.

[0019] When the measuring shaft of the present invention is used to measure the thickness of a metal film or a metal layer on a composite film, the measurement cost is low, and the device is not easily disturbed by the external environment. The measurement accuracy and stability of the measurement results can be guaranteed, and the device is suitable for mass production.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0022] Figure 1 It is a structural schematic diagram of a measuring piece provided by the utility model.

[0023] Figure 2 yes Figure 1 sectional view of .

[0024] Figure 3 This is a schematic diagram of the application of the measuring piece provided by the utility model.

[0025] Description of reference numerals:

[0026] 100. Measuring parts; 1. Measuring shaft; 2. Conductive ring; 3. Conducting wire; 4. Electric slip ring; 5. Bearing seat; 6. Insulating ring;

[0027] 200, unwinding reel; 300, rewinding reel; 400, film to be tested. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0030] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0031] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0032] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] like Figures 1 to 3 As shown, according to the first aspect of the present invention, a measuring part 100 is provided, which is used for measuring the thickness of metal films, including: a measuring shaft 1 and a support structure; the measuring shaft 1 is rotatably arranged on the support structure, and a plurality of conductive rings 2 are arranged on the measuring shaft 1 at intervals along its length direction, and the plurality of conductive rings 2 can be electrically connected to the measuring circuit respectively.

[0034] Specifically, in practical applications, metal films or composite films with metal layers can be used as battery production materials, such as battery electrodes. During the production process, the thickness of the metal films or composite films needs to be measured. In this embodiment, multiple spaced conductive rings 2 are provided on a measuring shaft 1, each of which is electrically connected to a measurement circuit. When the metal film contacts the measuring shaft 1, the metal film can be connected to the measurement circuit through any two conductive rings 2. The thickness of the metal film between the corresponding two conductive rings 2 can then be calculated using the measurement parameters of the measurement circuit.

[0035] In addition, the support structure allows the measuring shaft 1 to be assembled into other production equipment through its rotation, such as a vacuum coating machine. The specific form of the support structure can be designed based on the matching assembly parts, and this is not limited by the present invention. The rotation between the measuring shaft 1 and the support structure can be achieved through rotating parts such as bearings and gears, and the specific design can also be based on actual needs. The conductive ring 2 can be made of a conductive material, such as a metallic conductive material such as copper, and the width of the conductive ring 2 is preferably set to ensure stable contact and connection with the metal film. The number of conductive rings 2 is designed based on the specific dimensions of the film 400 to be measured.

[0036] When using the measuring device 100 of the present invention to measure the thickness of the metal layer on a metal film or composite film, it is only necessary to electrically connect any two conductive rings 2 to the positive and negative terminals of the measuring circuit. This reduces measurement costs, is less susceptible to interference from the external environment, ensures measurement accuracy and stability of the measurement results, and is suitable for mass production. The measuring circuit can be used to measure resistance or current, for example, by connecting any two adjacent or non-adjacent conductive rings 2 to the positive and negative terminals of a multimeter for readings. The specific thickness of the metal layer on the metal film or composite film can then be calculated based on the conductivity of the film 400 to be measured and the distance between the two conductive rings 2.

[0037] Alternatively, as Figure 2 As shown, the measuring shaft 1 is a hollow structure, and the plurality of conductive rings 2 are respectively led out from the hollow structure to one end of the measuring shaft 1 through wires 3 .

[0038] Specifically, in this embodiment, the measuring shaft 1 is configured as a hollow structure so that each conductive ring 2 can be connected to one end of the measuring shaft 1 via a wire 3, so that the connecting wire harness of the entire measuring member 100 can be hidden inside the measuring shaft 1, thereby preventing the measuring shaft 1 from being entangled or interfered with by the connecting wire harness during rotation, thereby improving the reliability of the measurement of the measuring member 100 and the neatness of the appearance of the measuring member 100. Among them, each conductive ring 2 can be led out to the same end of the measuring shaft 1 via the wire 3 according to actual needs, or can be led out to different ends of the measuring shaft 1 respectively, and the specific design can be based on actual needs. In addition, in order to facilitate the connection of different conductive rings 2 to the measurement circuit, a number or label can be affixed to the lead-out wire 3 to facilitate identification of the specific position of the conductive ring 2 and the distance between the two conductive rings 2 connected to the measurement circuit.

[0039] Alternatively, as Figures 1 to 2 As shown, it also includes an electric slip ring 4, which is connected to one end of the measuring shaft 1; the electric slip ring 4 is provided with a plurality of electrical connection points, and the plurality of conductive rings 2 are connected to the connection points one by one, and the plurality of connection points can be electrically connected to the measuring circuit respectively.

[0040] Specifically, the slip ring 4 is a device that enables signal and power transmission between rotating and stationary components. Its primary function is to connect rotating bodies and transmit energy and signals. It is wear-resistant, corrosion-resistant, and high-temperature resistant, ensuring stable and reliable conductivity. It supports multi-channel signal transmission and offers excellent communication quality. It also features a long lifespan, is easy to maintain, and is compact, lightweight, and convenient to install, providing a strong guarantee for stable equipment operation.

[0041] In this embodiment, an electric slip ring 4 is connected to the end of the measuring shaft 1. Multiple connection points are provided on the slip ring 4, allowing each conductive ring 2 to be connected to one of these connection points. This facilitates identification and electrical connection of each slip ring 4. Furthermore, the connecting wires 3 or other connectors can be completely hidden within the hollow structure of the measuring shaft 1, further improving the usability and reliability of the measuring device 100. The slip ring 4 can be provided at one end of the measuring shaft 1, allowing each conductive ring 2 to be connected to the same end with the slip ring 4. If there are a large number of conductive rings 2, one slip ring 4 can be provided at each end of the measuring shaft 1, allowing each conductive ring 2 to enter and exit the nearest slip ring 4.

[0042] Alternatively, as Figures 1 to 2 As shown, the support structure includes two bearing seats 5, and both ends of the measuring shaft 1 are rotatably disposed on the two bearing seats 5 through bearings.

[0043] Specifically, in this embodiment, both ends of the measuring shaft 1 are rotatably disposed on two bearing seats 5 through bearings, and the entire measuring member 100 can be assembled in other equipment or production lines through the bearing seats 5 to realize assembly line production and improve production efficiency.

[0044] In the above structure, a bearing connection is used to realize the relative rotation of the measuring shaft 1, which can reduce the friction between the supporting structure and the measuring shaft 1, improve the smoothness of the rotation of the measuring shaft 1, and has the advantages of strong bearing capacity, high precision, high speed, and protection of the measuring shaft 1 from force damage, so as to improve the reliability and service life of the measuring part 100.

[0045] Alternatively, as Figures 1 to 2 As shown, the plurality of conductive rings 2 are arranged at equal intervals along the length direction of the measuring shaft 1 .

[0046] Specifically, in this embodiment, the conductive rings 2 can be evenly spaced along the length of the measuring shaft 1 at equal intervals. This facilitates measuring the thickness of the metal film or metal layer on the composite film at different locations along the length of the measuring shaft 1, thereby detecting the uniformity of the thickness at each location and improving the quality of the metal film or metal layer. Furthermore, the equidistant arrangement of the conductive rings 2 facilitates the production and manufacturing of the measuring shaft 1, reducing production costs. The spacing can be designed based on actual needs, for example, by dividing the measuring shaft 1 into sixths, fifths, or thirds according to its length.

[0047] Optionally, refer to Figure 1 The plurality of conductive rings 2 are arranged at unequal intervals along the length direction of the measuring shaft 1 in accordance with an arithmetic progression or a geometric progression.

[0048] Specifically, in practical applications, multiple conductive rings 2 can be designed with unequal spacing along the length of the measuring shaft 1 to detect the thickness of the metal film or metal layer at random locations, further improving detection accuracy and film thickness uniformity. The spacing can be set according to a regular spacing combination such as an arithmetic progression or geometric progression, facilitating measurement of the metal film or metal layer and manufacturing the measuring shaft 1.

[0049] Alternatively, as Figure 1 As shown, an insulating ring 6 is sandwiched between two adjacent conductive rings 2 .

[0050] Specifically, in practical applications, to prevent short circuits between adjacent or non-adjacent conductive rings 2, insulating rings 6 are positioned between the conductive rings 2 to improve the reliability and safety of the measuring shaft 1 and ensure the accuracy of measurements by the measuring device 100. The insulating ring 6 is an annular region surrounding the measuring shaft 1, made of an insulating material, such as plastic. Its length along the measuring shaft 1 is typically greater than the width of the conductive rings 2. Furthermore, the placement of the insulating rings 6, alternating with the conductive rings 2 on the axial surface of the measuring shaft, improves the smoothness of the entire measuring shaft surface and further enhances measurement accuracy.

[0051] Optionally, it further includes a measuring circuit, and any two of the plurality of conductive rings 2 are respectively connected to the measuring circuit, and the measuring circuit is used to measure the resistance or current between any two of the conductive rings 2 .

[0052] Specifically, in practical applications, the thickness of a metal film or layer can be measured by connecting any two conductive rings 2 to a measurement circuit. The measured thickness is the thickness of the area between the two conductive rings 2 connected to the measurement circuit. The measurement circuit can be connected to an external terminal to instantly calculate the thickness based on the resistance or current measured by the measurement circuit, thereby improving measurement efficiency.

[0053] For example, in one embodiment, the conductive rings are made of aluminum foil with a resistivity of ρ = 2.884^10-5Ω / cm. The measurement circuit is a resistance measurement circuit. The two conductive rings 2 at the outermost ends of the measuring shaft 1 are connected to the measurement circuit. The measured resistance is R = 2.9Ω. According to the formula t(thickness) = ρ / R, the thickness of the metal film or metal layer on the composite film between the two conductive rings 2 is calculated to be 1^10-5cm, or 100nm. It should be noted that the data in this embodiment is for reference only and does not limit the actual application scope of the present invention.

[0054] According to a second aspect of the present invention, a coating machine is provided, comprising: the measuring piece 100 described in the first aspect.

[0055] Specifically, in this embodiment, the measuring device 100 provided in the first aspect can be applied to a coating machine. After a metal layer is coated on a composite film, the thickness of the composite film can be measured by the measuring device 100 to detect the coating effect of the coated metal layer, thereby improving the coating quality and preventing the composite film from being scrapped due to quality problems in subsequent production, thereby improving product yield and reducing production costs. The coating machine can be a vacuum coating machine, etc., which is not limited by the present invention.

[0056] According to a third aspect of the present invention, a battery production line is provided, comprising: the measuring piece 100 described in the first aspect; or, the coating machine described in the second aspect.

[0057] Specifically, in practical applications, the measuring device 100 provided in the first aspect or the coating machine provided in the second aspect and equipped with the measuring device 100 can be installed in a battery production line. By detecting the thickness of the metal layer on the metal film or composite film using the measuring device 100, the quality and yield of battery production materials can be improved, thereby increasing the product yield of the battery production line and reducing production costs. The metal film or composite film can be used as the positive electrode sheet or negative electrode sheet of the battery.

[0058] like Figure 3As shown, a schematic diagram of the assembly and measurement method of the film to be tested 400 in a battery production line or a coating machine is provided. The film to be tested 400 (metal film or composite film) is wound on the unwinding shaft 200 before passing through the coating machine or the next production step. One end of the film is passed around and contacts the measuring shaft and then wound up by the winding shaft 300. In this process, the film on the unwinding shaft 200 is wound onto the winding shaft 300 through the measuring shaft in turn. The measuring part 100 detects the thickness of the film to be tested 400 at different positions to ensure the quality of the film to be tested 400 on the winding shaft 300, so as to facilitate the next step of the process. When the film to be tested 400 is wound from the unwinding shaft 200 to the winding shaft 300, the film to be tested 400 will drive the measuring shaft 1 to rotate. At the same time, since the conductive ring is arranged around the measuring shaft, it can ensure that the film to be tested 400 can always contact the conductive ring 2, so as to improve the smoothness of the process, the efficiency of winding and measurement, avoid damage to the film to be tested 400 due to friction between the film to be tested 400 and the measuring shaft 1, and improve the safety of the measurement.

[0059] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0060] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A measuring device used for measuring the thickness of metal films, characterized in that: include: Measuring shafts and supporting structures; The measuring shaft is rotatably arranged on the supporting structure. A plurality of conductive rings are arranged on the measuring shaft at intervals along the length direction thereof. The plurality of conductive rings can be electrically connected to the measuring circuit respectively.

2. The measuring piece according to claim 1, characterized in that The measuring shaft is a hollow structure, and the plurality of conductive rings are respectively led out from the hollow structure to one end of the measuring shaft through wires.

3. The measuring piece according to claim 1 or 2, characterized in that: It also includes an electric slip ring connected to one end of the measuring shaft; The electric slip ring is provided with a plurality of electrical connection points, and the plurality of conductive rings are connected to the connection points in a one-to-one correspondence, and the plurality of connection points can be electrically connected to the measurement circuit respectively.

4. The measuring element according to claim 1, wherein: The supporting structure includes two bearing seats, and both ends of the measuring shaft are rotatably arranged on the two bearing seats through bearings.

5. The measuring piece according to claim 1, characterized in that The plurality of conductive rings are arranged at equal intervals along the length direction of the measuring axis.

6. The measuring element according to claim 1, characterized in that The plurality of conductive rings are arranged at unequal intervals along the length direction of the measuring axis according to an arithmetic progression or a geometric progression.

7. The measuring element according to claim 1, characterized in that An insulating ring is sandwiched between two adjacent conductive rings.

8. The measuring element according to claim 1, characterized in that It also includes a measuring circuit, any two of the plurality of conductive rings are respectively connected to the measuring circuit, and the measuring circuit is used to measure the resistance or current between any two of the conductive rings.

9. A coating machine, characterized in that: include: The measuring element according to any one of claims 1 to 8.

10. A battery production line, characterized in that: include: The measuring element according to any one of claims 1 to 8; Alternatively, it includes the coating machine described in claim 9.

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