Wire feeding device and evaporation system

Abstract

The utility model discloses a wire feeding device and an evaporation system. The wire feeding device comprises a wire feeding mechanism and a wire feeding pipe. The wire feeding pipe is connected with the wire feeding mechanism, and the wire feeding mechanism is used for providing wires for the wire feeding pipe and enabling the wires to enter the wire feeding pipe from an inlet of the wire feeding pipe and be discharged from an outlet of the wire feeding pipe. The wire feeding pipe comprises a body, an inlet is formed in one end of the body, the body is in an arc shape, and the circle center of the circle where the body is located is located below the body in the gravity direction. According to the technical scheme, the evaporation quality can be effectively improved, and then the quality of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of vacuum coating technology, and in particular to a wire feeding device and a vapor deposition system. Background Art

[0002] The current collector of the battery often uses an aluminum-plated film as a carrier. At present, aluminum wire is generally evaporated into gas by a vapor deposition process and coated on a polymer film to form a current collector. Since the quality of vapor deposition affects the quality of the battery, how to improve the quality of vapor deposition is a technical problem that needs to be solved in the development of battery technology. Utility Model Content

[0003] The present application provides a wire feeding device and a vapor deposition system. The technical solution provided in the present application can effectively improve the vapor deposition quality, thereby improving the quality of the battery.

[0004] In a first aspect, some embodiments of the present application provide a wire feeding device, which includes a wire feeding mechanism and a wire feeding tube. The wire feeding tube is connected to the wire feeding mechanism, and the wire feeding mechanism is used to provide wire to the wire feeding tube, and the wire enters the inside of the wire feeding tube from the inlet of the wire feeding tube and is discharged from the outlet of the wire feeding tube. The wire feeding tube includes a body, one end of the body forms an inlet, the body is in an arc shape, and along the direction of gravity, the center of the circle where the body is located is below the body.

[0005] In the above scheme, by setting the main body of the wire feeding tube to be in an arc shape, the wire can be smoothly deformed along the inner wall of the wire feeding tube, thereby reducing the resistance of the wire feeding tube to the wire, thereby reducing the impact force of the wire on the wire feeding mechanism, causing the wire feeding mechanism to get stuck, resulting in the risk of unstable wire feeding of the wire feeding mechanism, so that the position of the wire falling to the evaporation device is unstable, thereby enabling the wire to be effectively evaporated and evenly covered on the polymer film so that the quality of the current collector is high, and the quality of the battery is high.

[0006] According to some embodiments of the present application, the radius of the circle where the center line of the main body lies is greater than or equal to 250 mm and less than or equal to 320 mm.

[0007] In the above scheme, the radius of the circle where the center line of the main body is located is set to be greater than or equal to 250 mm and less than or equal to 320 mm, which can effectively reduce the resistance encountered by the wire when passing through the wire feeding tube, reduce the impact on the wire feeding mechanism, and reduce the risk of jamming of the wire feeding mechanism so as to stably feed the wire, thereby making the landing position of the wire stable and the evaporation quality high, which is beneficial to improving the quality of the battery.

[0008] According to some embodiments of the present application, the radius of the circle where the center line of the main body lies is greater than or equal to 280 mm and less than or equal to 290 mm.

[0009] In the above scheme, the radius of the circle where the center line of the main body is located is set to be greater than or equal to 280 mm and less than or equal to 290 mm, which can further reduce the resistance encountered by the wire when passing through the wire feeding tube, reduce the impact on the wire feeding mechanism, and reduce the risk of jamming of the wire feeding mechanism to stably feed the wire, thereby making the landing position of the wire stable and the evaporation quality high, which is beneficial to improving the quality of the battery.

[0010] According to some embodiments of the present application, the wire feeding tube also includes a bending section, which is connected to the other end of the body, and the bending section is away from one end of the body to form an outlet. Along the direction of gravity, the bending section is inclined downward relative to the body.

[0011] In the above scheme, a bending section is provided at the end of the wire feeding tube, which can stabilize the feeding angle of the wire and the landing angle of the wire in the evaporation device, so that the aluminum wire falls on the evaporation surface of the evaporation device at a suitable angle (for example, 45 degrees) as much as possible, thereby making the evaporation effect on both sides of the wire highly consistent, which is beneficial to the improvement of the evaporation quality and further the improvement of the battery quality.

[0012] According to some embodiments of the present application, the length of the main body is L1, and the length of the bent section is L2, satisfying 0.10≤L2 / L1≤0.17.

[0013] In the above scheme, by setting the ratio of the length of the bending section to the length of the main body to be not less than 0.10 and not more than 0.14, on the one hand, the resistance of the wire of the wire feeding tube can be made smaller, reducing the impact on the wire feeding mechanism, making the wire feeding stable, without jamming, and the landing point position stable; on the other hand, the wire delivery angle can be made stable, thereby stabilizing the angle with the evaporation surface, which is beneficial to improving the evaporation effect.

[0014] According to some embodiments of the present application, the center line of the bending segment is a straight line.

[0015] In the above scheme, by setting the bending section to a straight tube shape, the delivery angle of the wire can be made highly consistent, so that it has a stable angle with the evaporation surface of the evaporation device, which is beneficial to improving the evaporation quality and further improving the battery quality.

[0016] According to some embodiments of the present application, the end of the center line of the main body is connected to the center line of the bending section, and the angle between the tangent of the end and the center line of the bending section is greater than or equal to 2° and less than or equal to 7°.

[0017] In the above scheme, after many tests, the angle between the tangent line at the end of the center line of the main body and the center line of the bending section is set to be greater than or equal to 2° and less than or equal to 7°. On the one hand, it can reduce the resistance of the silk thread passing through the intersection of the main body and the bending section, so that the landing point position is stable. On the other hand, it can stabilize the delivery angle of the silk thread, making the landing angle stable and appropriate, which is beneficial to the improvement of the evaporation quality, and then to the improvement of the battery quality.

[0018] According to some embodiments of the present application, the length of the wire feeding tube is greater than or equal to 170 mm and less than or equal to 200 mm.

[0019] In the above scheme, the overall length of the wire feeding tube is set to be greater than or equal to 170 mm and less than or equal to 200 mm. On the one hand, it can effectively guide the delivery direction and angle of the wire, and reduce the risk of the wire hanging too much due to the short guiding distance, causing the wire feeding mechanism to shake and affect the wire feeding quality; on the other hand, it can reduce the risk of affecting the utilization of the factory space due to the excessive length of the wire feeding tube.

[0020] According to some embodiments of the present application, the wire feeding mechanism includes a bracket, a driven wheel, a driving wheel and a first driving part, the driven wheel and the driving wheel are rotatably arranged on the bracket, the driven wheel and the driving wheel are arranged at intervals and form a wire feeding channel together, and the first driving part is connected to the driving wheel to drive the driving wheel to rotate so that the wire moves along the wire feeding channel. The wire feeding tube is arranged on the bracket, and the inlet of the wire feeding tube is connected to the wire feeding channel.

[0021] In the above scheme, the wire feeding mechanism has a simple structure and is easy to maintain. The first driving part drives the driving wheel to rotate, so that the wire moves in the wire feeding channel under the action of the driving wheel and the driven wheel to enter the interior of the wire feeding tube and is thrown out from the outlet of the wire feeding tube, so that it can enter the evaporation device to achieve evaporation.

[0022] According to some embodiments of the present application, the first driving unit includes a first motor, a bevel gear and a bevel gear, the bevel gear is connected to the driving wheel, the central axis of the bevel gear is parallel to the horizontal plane, the first motor is arranged vertically, the bevel gear is arranged at the output end of the first motor, and the bevel gear and the bevel gear are meshed with each other.

[0023] In the above scheme, by setting bevel gears and bevel gears, the first motor can be arranged vertically, saving lateral space, so that the lateral space can be reasonably utilized to arrange more wire feeding devices, which is beneficial to improving the evaporation efficiency and further improving the battery manufacturing efficiency.

[0024] According to some embodiments of the present application, the wire feeding device further includes an angle adjustment mechanism, which is connected to the wire feeding mechanism and is used to adjust the pitch angle of the wire feeding mechanism.

[0025] In the above scheme, by setting an angle adjustment mechanism to adjust the pitch angle of the wire feeding mechanism, the wire feeding point can be adjusted forward and backward, improving the landing point problem caused by the wire being deformed by its own stress or external impact, thereby improving the evaporation quality and further improving the quality of the battery.

[0026] According to some embodiments of the present application, the angle adjustment mechanism includes a frame, a second motor, a screw, a gear and a connecting piece. The gear is rotatably arranged on the frame, and the central axis of the gear is parallel to the horizontal plane. The wire feeding mechanism is connected to the gear through the connecting piece and rotates with the gear. The second motor is arranged on the frame and vertically. The screw is arranged at the output end of the second motor, and the screw is meshed with the gear.

[0027] In the above scheme, the angle adjustment mechanism has a simple structure and is easy to maintain. On the one hand, the second motor drives the screw to drive the gear to rotate, so as to efficiently adjust the pitch angle of the wire feeding mechanism; on the other hand, by setting the screw and the gear, the second motor can be arranged vertically, saving lateral space, so that the lateral space can be reasonably used to arrange more wire feeding devices, which is beneficial to improve the evaporation efficiency, and then to improve the battery manufacturing efficiency.

[0028] In a second aspect, some embodiments of the present application provide an evaporation system, comprising an evaporation device and the wire feeding device provided in the first aspect. The wire feeding device is used to provide wire to the evaporation device.

[0029] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of an evaporation system in some embodiments of the present application;

[0032] Figure 2 A schematic diagram of a wire feeding device in some embodiments of the present application;

[0033] Figure 3 Schematic diagram of a wire feeding tube in some embodiments of the present application;

[0034] Figure 4 It is a three-dimensional exploded view of the partial structure of the wire feeding device in some embodiments of the present application;

[0035] Figure 5 It is a partial schematic diagram of the first driving unit in some embodiments of the present application.

[0036] Icons: 1000-evaporation system; 100-wire feeding device; 200-evaporation device; 10-wire feeding mechanism; 11-bracket; 12-driven wheel; 13-driving wheel; 14-first motor; 15-bevel gear; 16-bevel gear; 17-rotating rod; 20-wire feeding tube; 21-main body; 22-bending section; 30-angle adjustment mechanism; 31-frame; 310-support ear; 32-second motor; 33-screw; 34-gear; 35-connecting piece; z-direction of gravity. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] The battery mentioned in the embodiments of the present application may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, etc., and the embodiments of the present application are not limited to this. The current collector is a basic component of the battery, and its performance plays a vital role in the battery performance. At present, the current collector of the battery is mainly metal aluminum foil and copper foil. The metal foil has the advantage of good conductivity, but due to the inherent properties of the metal, it is more prone to bending and tearing, causing the battery performance to decline. In order to optimize the energy density and reliability of the battery, a composite current collector composed of a metal foil and a polymer film (or polymer layer) has gradually been developed, and the production of the composite current collector often uses an evaporation system to compound the metal foil on the polymer film through a vacuum evaporation process. Vacuum evaporation is a production process for laminating metal on the surface of an object. Its main principle is: the material to be evaporated is placed on an evaporation device, and then the evaporation device is heated, so that the material to be evaporated placed on the evaporation device is melted and vaporized, and the molten and vaporized material is layered upward in the form of atoms or atomic groups under vacuum conditions onto the object passing above, thereby forming a thin film on the object. For example, aluminized film requires a vacuum aluminizing process to evaporate high-purity aluminum wire into gas at high temperature (close to 1000 degrees Celsius), and then pass the polymer film through a vacuum evaporation chamber to make the gaseous aluminum molecules precipitate and adhere to the surface of the polymer film to form a bright, beautiful and strong metallic soft packaging material. The evaporation system suitable for the production of aluminized film generally includes a wire feeding device and an evaporation device. The wire feeding device generally includes a wire feeding mechanism and a wire feeding tube. The aluminum wire comes out of the wire winding disc through the feeding mechanism and enters the wire feeding tube, and then comes out of the wire feeding tube to reach the evaporation device.

[0046] The development of battery technology must consider multiple design factors at the same time, such as performance parameters such as energy density, cycle life, discharge capacity, charge and discharge rate, and the product quality of the battery. The quality of the current collector affects the quality of the battery. Therefore, in batteries with composite current collectors, the quality of evaporation affects the quality of the battery.

[0047] However, the wire feeding tubes of some current wire feeding devices are straight tubes or branch tubes plus bends, and the inlet is formed in the straight tube. When the aluminum wire enters the wire feeding tube through the inlet, the aluminum wire is easily deformed in the straight tube or the intersection of the straight tube and the bend, which makes the aluminum wire subject to greater resistance. Therefore, it will cause impact on the wire feeding mechanism, making the wire feeding mechanism easy to get stuck, so that the position of the aluminum wire falling to the evaporation device is unstable, and the metal molecules cannot be uniformly precipitated and attached to the surface of the polymer film, which affects the evaporation quality.

[0048] In view of this, in order to improve the problem that the wire encounters greater resistance when passing through the wire feeding tube, causing impact on the wire feeding mechanism, affecting the stability of the wire feeding mechanism, thereby affecting the evaporation quality, and further affecting the battery quality, some embodiments of the present application provide a wire feeding device, which includes a wire feeding mechanism and a wire feeding tube. The wire feeding tube is connected to the wire feeding mechanism, and the wire feeding mechanism is used to provide the wire to the wire feeding tube, and allows the wire to enter the interior of the wire feeding tube from the inlet of the wire feeding tube and be discharged from the outlet of the wire feeding tube. Among them, the wire feeding tube includes a main body, one end of the main body forms an inlet, the main body is in an arc shape, and along the direction of gravity, the center of the circle where the main body is located is below the main body.

[0049] In the above scheme, by setting the main body of the wire feeding tube to be in an arc shape, the wire can be smoothly deformed along the inner wall of the wire feeding tube, reducing the resistance of the wire feeding tube to the wire, thereby reducing the impact force of the wire on the wire feeding mechanism, causing the wire feeding mechanism to get stuck, resulting in the risk of unstable wire feeding of the wire feeding mechanism, resulting in an unstable position of the wire falling to the evaporation device, and thus enabling the wire to be effectively evaporated and evenly covered on the polymer film so that the quality of the composite current collector is high, and the quality of the battery is high.

[0050] In some embodiments of the present application, the wires used by the wire feeding device may be, but are not limited to, aluminum wires, copper wires, steel wires, or other materials. In some embodiments of the present application, the wires are evaporated on the workpiece in the evaporation system. The workpiece includes, but is not limited to, plastic films, metal films, or rubber films.

[0051] See also Figure 1 , Figure 1 Schematic diagram of an evaporation system in some embodiments of the present application. In some embodiments, the evaporation system can be used to vacuum evaporate aluminum wire onto the surface of a polymer film to obtain a composite current collector.

[0052] The evaporation system 1000 includes a wire feeding device 100 and an evaporation device 200. The wire feeding device 100 is disposed on one side of the evaporation device 200, and the aluminum wire is transported into the evaporation device 200 by a wire feeding light. A heating device is disposed in the evaporation device 200 to increase the high temperature environment capable of evaporating the aluminum wire. When the aluminum wire is transported to the evaporation device 200, it can be evaporated into a gaseous state and attached to the surface of the polymer film above the evaporation device 200.

[0053] According to some embodiments of this application, see Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of a wire feeding device 100 in some embodiments of the present application. Figure 3 Schematic diagram of the wire feeding tube 20 in some embodiments of the present application.

[0054] The wire feeding device 100 includes a wire feeding mechanism 10 and a wire feeding tube 20. The wire feeding tube 20 is connected to the wire feeding mechanism 10, and the wire feeding mechanism 10 is used to provide wire to the wire feeding tube 20, so that the wire enters the inside of the wire feeding tube 20 from the inlet of the wire feeding tube 20 and is discharged from the outlet of the wire feeding tube 20. The wire feeding tube 20 includes a body 21, one end of the body 21 forms an inlet, the body 21 is in an arc shape, and along the gravity direction z, the center of the circle where the body 21 is located is below the body 21.

[0055] The wire feeding tube 20 is connected to the wire feeding mechanism 10, and the inlet of the wire feeding tube 20 is arranged toward the wire feeding mechanism 10 so as to receive the wire delivered by the wire feeding mechanism 10. The wire includes but is not limited to aluminum wire, copper wire, steel wire and other materials. Some embodiments of the present application take aluminum wire as an example for explanation.

[0056] In some embodiments, the wire can be set on a wire winding disc. When the wire feeding device 100 is on standby, the free end of the wire can be connected to the wire feeding mechanism 10. The wire mechanism is activated to pull the wire, the wire winding disc rotates, and the wire moves toward the inlet of the wire tube.

[0057] In some embodiments, the wire feeding mechanism 10 may be a roller-type wire feeding mechanism 10, which realizes wire feeding by pressing a pressure wheel onto the wire and driving the pressure wheel to roll to move the wire.

[0058] The wire feeding tube 20 is a structural member connected to the wire feeding mechanism 10. The wire feeding tube 20 is tubular, and a channel for the wire to move is formed inside the wire feeding tube 20. Exemplarily, the wire feeding mechanism 10 provides force to the wire, so that the wire enters the wire feeding tube 20 from the inlet of the wire feeding tube 20, and the wire is discharged from the outlet of the wire feeding tube 20 along the inside of the wire feeding tube 20. The direction of the outlet of the wire feeding tube 20 may correspond to the evaporation device 200, and the wire discharged from the outlet of the wire feeding tube 20 may fall on the evaporation device 200. In some embodiments, the material of the wire feeding tube 20 includes but is not limited to molybdenum, tungsten-molybdenum alloy or other materials.

[0059] The body 21 may be the main part of the wire feed tube 20. In some embodiments, see Figure 3 The wire feeding tube 20 may include a body 21 and a bending section 22, and the body 21 and the bending section 22 are connected in sequence along the direction from the inlet of the wire feeding tube 20 to the outlet. The opening of the body 21 away from the bending section 22 is the inlet of the wire feeding tube 20, and the opening of the bending section 22 away from the body 21 is the outlet of the wire feeding tube 20. In other embodiments, the wire feeding tube 20 may include a body 21, one end opening of the body 21 is the inlet of the wire feeding tube 20, and the other end opening is the outlet of the wire feeding tube 20.

[0060] “The body 21 is in an arc shape” can be understood as the body 21 is an arc tube, and the center line of the body 21 is in an arc shape. “Along the gravity direction z, the center of the circle where the body 21 is located is below the body 21” can be understood as the posture of the wire feeding tube 20 when the wire feeding device 100 is in use. Exemplarily, the wire feeding tube 20 is arched upward or obliquely upward, so that the direction in which the wire can be discharged from the outlet of the wire feeding tube 20 is downward or has a downward sub-direction.

[0061] In the above scheme, by setting the main body 21 of the wire feeding tube 20 to be in an arc shape, the wire can be smoothly deformed along the inner wall of the wire feeding tube 20, reducing the resistance of the wire feeding tube 20 to the wire, thereby reducing the impact force of the wire on the wire feeding mechanism 10, causing the wire feeding mechanism 10 to get stuck, resulting in the risk of unstable wire feeding by the wire feeding mechanism 10, so that the position of the wire falling to the evaporation device 200 is unstable, and the wire can be effectively evaporated and evenly covered on the polymer film so that the quality of the composite current collector is high, and the quality of the battery is high.

[0062] According to some embodiments of the present application, the radius of the circle where the center line of the main body 21 is located is greater than or equal to 250 mm and less than or equal to 320 mm.

[0063] The center line of the body 21 can be understood as the center line of the pipeline of the body 21. In some embodiments, the center line of the body 21 can be measured by rectangular coordinate method, polar coordinate method, angle intersection method, distance intersection method and other methods.

[0064] In some embodiments, the radius of the circle where the center line of the body 21 is located is Figure 3 The label number is R, and the value of R can be 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm or any value between two adjacent values.

[0065] In the above scheme, through multiple experiments and summarizing the appropriate range of the radius of the circle where the center line of the main body 21 is located, the radius of the circle where the center line of the main body 21 is located is set to be greater than or equal to 250 mm and less than or equal to 320 mm, which can effectively reduce the resistance encountered by the wire when passing through the wire feeding tube 20, reduce the impact on the wire feeding mechanism 10, and reduce the risk of the wire feeding mechanism 10 getting stuck so as to stably feed the wire, thereby making the landing position of the wire stable, the evaporation quality high, and conducive to improving the quality of the battery.

[0066] According to some embodiments of the present application, the radius of the circle where the center line of the main body 21 is located is greater than or equal to 280 mm and less than or equal to 290 mm.

[0067] In some embodiments, the radius of the circle where the center line of the body 21 is located can be 280 mm, 285 mm, 290 mm, or any value between two adjacent values.

[0068] In the above scheme, through further multiple tests and summarizing the further appropriate range of the radius of the circle where the center line of the main body 21 is located, the radius of the circle where the center line of the main body 21 is located is set to be greater than or equal to 280 mm and less than or equal to 290 mm, which can further reduce the resistance encountered by the wire when passing through the wire feeding tube 20, reduce the impact on the wire feeding mechanism 10, and reduce the risk of the wire feeding mechanism 10 getting stuck so as to stably feed the wire, thereby making the landing position of the wire stable and the evaporation quality high, which is beneficial to improving the quality of the battery.

[0069] According to some embodiments of the present application, the wire feeding tube 20 also includes a bending section 22, which is connected to the other end of the main body 21. The bending section 22 forms an outlet at one end away from the main body 21. Along the gravity direction z, the bending section 22 is inclined downward relative to the main body 21.

[0070] The bending section 22 is a tubular structure disposed at one end of the body 21. In some embodiments, the center line of the bending section 22 does not coincide with the center line of the body 21. “Along the gravity direction z, the bending section 22 is tilted downward relative to the body 21” can be understood as the center line of the bending section 22 is tilted relative to the center line of the body 21.

[0071] In some embodiments, the connection relationship between the bending section 22 and the body 21 includes, but is not limited to, welding, bonding, screw connection, or integral molding.

[0072] In some embodiments, the end surface of the bent section 22 facing away from the body 21 may be an inclined surface, and the upper portion of the end portion of the bent end facing away from the body 21 is farther away from the body 21 than the lower portion.

[0073] In the above scheme, a bending section 22 is provided at the end of the wire feeding tube 20, which can stabilize the feeding angle of the wire and the landing angle of the wire in the evaporation device 200, so that the aluminum wire falls on the evaporation surface of the evaporation device 200 at a suitable angle (for example, 45 degrees) as much as possible, so that the evaporation effect on both sides of the wire is highly consistent, which is beneficial to the improvement of the evaporation quality and further to the improvement of the battery quality.

[0074] According to some embodiments of this application, see Figure 3 The length of the main body 21 is L1, and the length of the bending section 22 is L2, satisfying 0.10≤L2 / L1≤0.17.

[0075] In some embodiments, the length of the body 21 can be measured by a tape measure, photogrammetry, manual wheel measurement, etc. The length of the bending section 22 can be measured by a tape measure, photogrammetry, manual wheel measurement, etc.

[0076] The length of the main body 21 is L1, the length of the bending section 22 is L2, and the ratio of L2 to L1 is L2 / L1, which can be 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17 or any value between two adjacent values.

[0077] In the above scheme, by setting the ratio of the length of the bending section 22 to the length of the main body 21 to be not less than 0.10 and not more than 0.14, on the one hand, the resistance of the wire of the wire feeding tube 20 can be made smaller, reducing the impact on the wire feeding mechanism 10, making the wire feeding stable, without jamming, and the landing point position stable; on the other hand, the wire delivery angle can be stabilized, thereby stabilizing the angle with the evaporation surface, which is beneficial to improving the evaporation effect.

[0078] In some other embodiments, the ratio of L2 to L1 is L2 / L1, which may also be a value greater than 0.17, such as 0.18, 0.19, 2.0, etc.

[0079] According to some embodiments of the present application, the center line of the bending section 22 is a straight line.

[0080] In some embodiments, the bent section 22 may be a straight tube.

[0081] In the above solution, by setting the bending section 22 as a straight tube, the delivery angle of the wire can be made highly consistent, so that it has a stable angle with the evaporation surface of the evaporation device 200, which is beneficial to improving the evaporation quality and further improving the battery quality.

[0082] In other embodiments, the bent section 22 may be a bent pipe.

[0083] According to some embodiments of this application, see Figure 3 The end of the center line of the body 21 is connected to the center line of the bending section 22, and the angle between the tangent of the end and the center line of the bending section 22 is greater than or equal to 2° and less than or equal to 7°.

[0084] The end of the center line of the body 21 may be the portion where the center line of the body 21 is connected to the center line of the bending section 22. The center line of the body 21 is an arc, the tangent of the end of the center line of the body 21 is a straight line, and the center line of the bending section 22 is a straight line. In some embodiments, along the gravity direction z, the center line of the bending section 22 and the tangent of the end of the center line of the body 21 intersect at the end of the center line of the body 21, and the center of the bending section 22 is at a lower position than the tangent of the end of the center line of the body 21.

[0085] In some embodiments, see Figure 3 The angle between the tangent line at the end of the center line of the main body 21 and the center line of the bending section 22 is α, and the value of α can be 2°, 3°, 4°, 5°, 6°, 7° or any value between two adjacent values.

[0086] In the above scheme, after many tests, the angle between the tangent line at the end of the center line of the main body 21 and the center line of the bending section 22 is set to be greater than or equal to 2° and less than or equal to 7°. On the one hand, it can reduce the resistance of the silk thread passing through the intersection of the main body 21 and the bending section 22, so that the landing point position is stable. On the other hand, it can stabilize the delivery angle of the silk thread, making the landing angle stable and appropriate, which is beneficial to the improvement of the evaporation quality, and then to the improvement of the battery quality.

[0087] According to some embodiments of the present application, the length of the wire feeding tube 20 is greater than or equal to 170 mm and less than or equal to 200 mm.

[0088] In some embodiments, the length of the wire feeding tube 20 may be the sum of the length of the body 21 and the length of the bending section 22 .

[0089] In some embodiments, the length of the wire feeding tube 20 may be 170 mm, 180 mm, 190 mm, 200 mm, or any value between two adjacent values.

[0090] In the above scheme, the overall length of the wire feeding tube 20 is set to be greater than or equal to 170 mm and less than or equal to 200 mm. On the one hand, it can effectively guide the delivery direction and angle of the wire, and reduce the risk of the wire hanging too much due to the short guiding distance, causing the wire feeding mechanism 10 to shake and affect the wire feeding quality; on the other hand, it can reduce the risk of affecting the space utilization of the factory due to the excessive length of the wire feeding tube 20.

[0091] In other embodiments, the length of the wire feeding tube 20 may be greater than 200 mm. For example, the length of the wire feeding tube 20 may be 201 mm, 202 mm, 203 mm or a larger value, or any value between two adjacent values.

[0092] According to some embodiments of this application, see Figure 2-Figure 5 , Figure 4 This is a three-dimensional exploded view of a partial structure of a wire feeding device 100 in some embodiments of the present application. Figure 5 It is a partial schematic diagram of the first driving unit in some embodiments of the present application.

[0093] The wire feeding mechanism 10 includes a bracket 11, a driven wheel 12, a driving wheel 13 and a first driving part. The driven wheel 12 and the driving wheel 13 are rotatably arranged on the bracket 11, respectively. The driven wheel 12 and the driving wheel 13 are arranged at intervals from each other and form a wire feeding channel together. The first driving part is connected to the driving wheel 13 and is used to drive the driving wheel 13 to rotate so that the wire moves along the wire feeding channel. The wire feeding tube 20 is arranged on the bracket 11, and the inlet of the wire feeding tube 20 is connected to the wire feeding channel.

[0094] The support 11 may be a supporting structure, supporting the wire feeding tube 20, the driven wheel 12, the driving wheel 13 and the first driving part. For example, the support 11 may be a structure formed by splicing a plurality of plates, see Figure 4 The support plate includes a vertical plate and a horizontal plate. The vertical plate is vertically arranged at the edge of the horizontal side. The wire feeding tube 20 is arranged on the vertical plate. The driven wheel 12 and the driving wheel 13 are rotatably arranged on the vertical plate respectively. The first driving part is arranged on the horizontal plate and is connected to the driving wheel 13 in transmission.

[0095] The wire feeding tube 20 and the bracket 11 may be directly connected or indirectly connected. The connection relationship between the wire feeding tube 20 and the bracket 11 includes but is not limited to welding, clamping, riveting or threaded connection.

[0096] The driven wheel 12 and the driving wheel 13 are arranged at a relative interval, and the two define a wire feeding channel together, and the rotation axes of the two can be parallel to the horizontal plane. The inlet of the wire feeding tube 20 can be arranged toward the wire feeding channel. The wire is located in the wire feeding channel, and the outer periphery of the driven wheel 12 and the outer periphery of the driving wheel 13 can contact the surface of the wire, and the driving wheel 13 can be rotated to move the wire.

[0097] The driven wheel 12 can be rotatably connected to the bracket 11 through a rotating shaft or a bearing. Figure 4 The driving wheel 13 is connected to the bracket 11 through a rotating rod 17. The rotating rod 17 can rotate relative to the bracket 11, and the driving wheel 13 rotates with the rotating rod 17. The first driving unit can drive the rotating rod 17 to rotate, thereby driving the driving wheel 13 to rotate.

[0098] In some embodiments, the first driving unit may be a driving structure capable of outputting torque to drive the driving wheel 13 to rotate. For example, the first driving unit may include a motor.

[0099] In the above scheme, the wire feeding mechanism 10 has a simple structure and is easy to maintain. The first driving part drives the driving wheel 13 to rotate, so that the wire moves in the wire feeding channel under the action of the driving wheel 13 and the driven wheel 12 to enter the interior of the wire feeding tube 20 and is thrown out from the outlet of the wire feeding tube 20, so that it can enter the evaporation device 200 to achieve evaporation.

[0100] According to some embodiments of this application, see Figure 4 and Figure 5 The first driving part includes a first motor 14, a bevel gear 15 and a bevel gear 16. The bevel gear 16 is connected to the driving wheel 13. The central axis of the bevel gear 16 is parallel to the horizontal plane. The first motor 14 is arranged vertically. The bevel gear 15 is arranged at the output end of the first motor 14. The bevel gear 15 and the bevel gear 16 are meshed with each other.

[0101] In some embodiments, the first driving unit may include a motor and a gear 34 assembly, and the output end of the motor drives the driving wheel 13 to rotate through the gear 34 assembly. Figure 4 and Figure 5 The first driving part includes a first motor 14, a bevel gear 15 and a bevel gear 16. The bevel gear 16 is connected to the rotating rod 17, and the bevel gear 16 can drive the rotating rod 17 to rotate, thereby driving the driving wheel 13 to rotate. The first motor 14 is vertically arranged on the horizontal plate of the bracket 11. The vertical arrangement can be understood as that the axis of the output shaft of the first motor 14 is vertically arranged. The first motor 14 makes more use of the vertical space and occupies less horizontal space.

[0102] The output shaft of the first motor 14 is provided with a bevel gear 15 , which meshes with the bevel gear 16 . The first motor 14 can rotate the driving wheel 13 through power transmission between the bevel gear 15 and the bevel gear 16 .

[0103] In the above scheme, by setting the bevel gear 15 and the bevel gear 16, the first motor 14 can be arranged vertically, saving lateral space, so that the lateral space can be reasonably utilized to arrange more wire feeding devices 100, which is beneficial to improve the evaporation efficiency and further improve the battery manufacturing efficiency.

[0104] In some embodiments, the evaporation system 1000 may include a plurality of wire feeding devices 100 , and the plurality of wire feeding devices 100 may be arranged in a lateral direction.

[0105] According to some embodiments of this application, see Figure 1 , Figure 2 as well as Figure 4 The wire feeding device 100 further includes an angle adjustment mechanism 30 , which is connected to the wire feeding mechanism 10 and is used to adjust the pitch angle of the wire feeding mechanism 10 .

[0106] In some embodiments, the pitch angle can be understood as the angle of the wire feeding mechanism 10 relative to the horizontal plane. For example, the larger the pitch angle, the more the outlet of the wire feeding tube 20 is directed upward, and the smaller the pitch angle, the more the outlet of the wire feeding tube 20 is directed downward.

[0107] The angle adjustment mechanism 30 is used to adjust the pitch angle of the wire feeding mechanism 10. Exemplarily, the angle adjustment mechanism 30 can rotate the wire feeding mechanism 10, with the rotation axis parallel to the horizontal plane, and the pitch angle of the wire feeding mechanism 10 can be adjusted by rotating the wire feeding mechanism 10.

[0108] In the above scheme, by setting the angle adjustment mechanism 30 to adjust the pitch angle of the wire feeding mechanism 10, the wire feeding point can be adjusted forward and backward, improving the landing point problem caused by the wire being deformed by its own stress or external impact, thereby improving the evaporation quality and further improving the quality of the battery.

[0109] According to some embodiments of this application, see Figure 2 and Figure 3 The angle adjustment mechanism 30 includes a frame 31, a second motor 32, a screw 33, a gear 34 and a connecting piece 35. The gear 34 is rotatably arranged on the frame 31. The central axis of the gear 34 is parallel to the horizontal plane. The wire feeding mechanism 10 is connected to the gear 34 through the connecting piece 35 and rotates with the gear 34. The second motor 32 is arranged on the frame 31 and is arranged vertically. The screw 33 is arranged at the output end of the second motor 32, and the screw 33 is meshed with the gear 34.

[0110] The frame 31 may be a supporting structure, and the frame 31 supports structures such as the second motor 32, the gear 34, and the connecting member 35. In some embodiments, the frame 31 may have a mounting surface, and the mounting surface is provided with two lugs 310. The gear 34 is rotatably provided between the two lugs 310 through a rotating shaft, and the gear 34 can drive the rotating shaft to rotate. There are two connecting members 35, and the two connecting members 35 are respectively located on both sides of the gear 34 and between the two lugs. The connecting member 35 is fixed to the rotating shaft and rotates with the rotating shaft. The two connecting members 35 can be connected to the bracket 11 of the wire feeding mechanism 10.

[0111] The second motor 32 is vertically arranged on the frame 31. The vertical arrangement can be understood as that the axis of the output shaft of the second motor 32 is vertically arranged. The second motor 32 makes more use of the vertical space and occupies less lateral space.

[0112] In some embodiments, the output shaft of the second motor 32 is provided with a screw 33, which is arranged vertically and meshes with a gear 34. When the second motor 32 works, the screw 33 and the gear 34 can drive the wire feeding mechanism 10 to rotate.

[0113] In the above scheme, the angle adjustment mechanism 30 has a simple structure and is easy to maintain. On the one hand, the second motor 32 drives the screw 33 to drive the gear 34 to rotate, so as to efficiently adjust the pitch angle of the wire feeding mechanism 10; on the other hand, by setting the screw 33 and the gear 34, the second motor 32 can be arranged vertically, saving lateral space, so that the lateral space can be reasonably used to arrange more wire feeding devices 100, which is beneficial to improve the evaporation efficiency, and further to improve the battery manufacturing efficiency.

[0114] According to some embodiments of the present application, an evaporation system 1000 is provided, comprising an evaporation device 200 and the wire feeding device 100 provided above. The wire feeding device 100 is used to provide wire to the evaporation device 200. In some embodiments, the evaporation device 200 may include an evaporation boat.

[0115] According to some embodiments of this application, see Figure 1-Figure 5 , a wire feeding device 100 is provided.

[0116] The wire feeding device 100 includes a wire feeding mechanism 10 , a wire feeding tube 20 and an angle adjustment mechanism 30 .

[0117] The wire feeding mechanism 10 includes a bracket 11, a driven wheel 12, a driving wheel 13, a first motor 14, a bevel gear 15 and a bevel gear 16. The wire feeding tube 20 is arranged on the bracket 11. The driven wheel 12 and the driving wheel 13 are rotatably arranged on the bracket 11 respectively, and the driven wheel 12 and the driving wheel 13 are arranged at intervals from each other and form a wire feeding channel together. The first motor 14 is arranged vertically and connected to the bracket 11. A bevel gear 15 is arranged at the output end of the first motor 14, and the bevel gear 15 is meshed with the bevel gear 16. The bevel gear 16 is transmission-connected with the driving wheel 13. When the first motor 14 is working, it can drive the driving wheel 13 to rotate through the bevel gear 15 and the bevel gear 16, thereby driving the aluminum wire located between the driven wheel 12 and the driving wheel 13 to move into the wire feeding tube 20.

[0118] The angle adjustment mechanism 30 is used to adjust the pitch angle of the wire feeding mechanism 10. In some embodiments, the angle adjustment mechanism 30 includes a second motor 32, a screw 33, a gear 34 and a connector 35 arranged vertically. The gear 34 is rotatably arranged on the frame 31, and the central axis of the gear 34 is parallel to the horizontal plane. The wire feeding mechanism 10 is connected to the gear 34 through the connector 35 and rotates with the gear 34. The output end of the second motor 32 is provided with a screw 33, and the screw 33 is meshed with the gear 34.

[0119] The wire feeding tube 20 includes a body 21 and a bending section 22. The body 21 may be a circular arc tube, and the bending section 22 may be a straight tube. Along the direction from the inlet of the wire feeding tube 20 to the outlet, the body 21 and the bending section 22 are connected in sequence, the opening of the body 21 away from the bending section 22 is the inlet of the wire feeding tube 20, and the opening of the bending section 22 away from the body 21 is the outlet of the wire feeding tube 20. Along the gravity direction z, the bending section 22 is tilted downward relative to the body 21. In some embodiments, the length of the wire feeding tube 20 is not less than 170 mm.

[0120] In some embodiments, the length of the body 21 is L1, and the length of the bending section 22 is L2, which satisfies 0.10≤L2 / L1≤0.17. For example, the value of L2 / L1 may be 0.15.

[0121] In some embodiments, the radius of the circle where the center line of the body 21 lies can be between 280 mm and 290 mm.

[0122] In some embodiments, the end of the center line of the body 21 is connected to the center line of the bending section 22, and the angle between the tangent of the end and the center line of the bending section 22 is greater than or equal to 2° and less than or equal to 7°.

[0123] In the above scheme, by setting the main body 21 of the wire feeding tube 20 to be in an arc shape and providing a bending section 22 at the end of the main body 21, on the one hand, the aluminum wire can be smoothly deformed along the inner wall of the wire feeding tube 20, reducing the resistance of the wire feeding tube 20 to the aluminum wire, thereby reducing the impact force caused by the aluminum wire on the wire feeding mechanism 10, causing the wire feeding mechanism 10 to get stuck, resulting in the risk of unstable wire feeding of the wire feeding mechanism 10, so that the position of the aluminum wire falling to the evaporation device 200 is unstable, and thus the aluminum wire can be effectively evaporated and evenly covered on the polymer film so that the quality of the composite current collector is high, and the quality of the battery is high; on the other hand, the delivery angle of the aluminum wire can be stabilized, so that the landing angle of the aluminum wire in the evaporation device 200 is stable, and the aluminum wire falls on the evaporation surface of the evaporation device 200 at a suitable angle (for example, 45 degrees) as much as possible, so that the evaporation effect on both sides of the aluminum wire is highly consistent, which is beneficial to the improvement of the evaporation quality, and thus to the improvement of the battery quality.

[0124] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wire feeding device, characterized in that: include: Wire feeding mechanism; A wire feeding tube connected to the wire feeding mechanism, wherein the wire feeding mechanism is used to provide wire to the wire feeding tube, so that the wire enters the inside of the wire feeding tube from the inlet of the wire feeding tube and is discharged from the outlet of the wire feeding tube; Wherein, the wire feeding tube comprises a body, one end of the body forms the inlet, the body is in an arc shape, and along the direction of gravity, the center of the circle where the body is located is below the body.

2. The wire feeding device according to claim 1, characterized in that: The radius of the circle where the center line of the body is located is greater than or equal to 250 mm and less than or equal to 320 mm.

3. The wire feeding device according to claim 2, characterized in that: The radius of the circle where the center line of the body is located is greater than or equal to 280 mm and less than or equal to 290 mm.

4. The wire feeding device according to claim 1, characterized in that: The wire feeding tube also includes a bending section, which is connected to the other end of the body. The bending section is away from one end of the body to form the outlet. Along the direction of gravity, the bending section is tilted downward relative to the body.

5. The wire feeding device according to claim 4, characterized in that: The length of the main body is L1, and the length of the bending section is L2, satisfying 0.10≤L2 / L1≤0.

17.

6. The wire feeding device according to claim 4, characterized in that: The center line of the bending section is a straight line.

7. The wire feeding device according to claim 6, characterized in that: The end of the center line of the body is connected to the center line of the bending section, and the angle between the tangent of the end and the center line of the bending section is greater than or equal to 2° and less than or equal to 7°.

8. The wire feeding device according to any one of claims 1 to 7, characterized in that: The length of the wire feeding tube is greater than or equal to 170 mm and less than or equal to 200 mm.

9. The wire feeding device according to claim 1, characterized in that: The wire feeding mechanism comprises a bracket, a driven wheel, a driving wheel and a first driving part, wherein the driven wheel and the driving wheel are rotatably arranged on the bracket respectively, the driven wheel and the driving wheel are arranged at intervals from each other and jointly form a wire feeding channel, and the first driving part is connected to the driving wheel and is used to drive the driving wheel to rotate so that the wire moves along the wire feeding channel; The wire feeding tube is arranged on the bracket, and the inlet of the wire feeding tube is communicated with the wire feeding channel.

10. The wire feeding device according to claim 9, characterized in that: The first driving part includes a first motor, a bevel gear and a bevel gear, the bevel gear is connected to the driving wheel, the central axis of the bevel gear is parallel to the horizontal plane, the first motor is arranged vertically, the bevel gear is arranged at the output end of the first motor, and the bevel gear and the bevel gear are meshed with each other.

11. The wire feeding device according to claim 1, characterized in that: The wire feeding device also includes an angle adjustment mechanism, which is connected to the wire feeding mechanism and is used to adjust the pitch angle of the wire feeding mechanism.

12. The wire feeding device according to claim 11, characterized in that: The angle adjustment mechanism includes a frame, a second motor, a screw, a gear and a connecting piece. The gear is rotatably arranged on the frame, and the central axis of the gear is parallel to the horizontal plane. The wire feeding mechanism is connected to the gear through the connecting piece and rotates with the gear. The second motor is arranged on the frame and vertically. The screw is arranged at the output end of the second motor, and the screw is meshed with the gear.

13. A vapor deposition system, characterized in that: include: Evaporation device; as well as The wire feeding device according to any one of claims 1 to 12 is used to provide wire to the evaporation device.

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