Coating foil slitting device and cutting equipment
Through the two-time slitting and deviation correction mechanism of the coating foil slitting device, the problem of unstable slitting width caused by the soft hollow foil in multiple coating processes is solved, and the accuracy of slitting width and the stability of battery production are achieved.
Patent Information
- Application Number
- CN202422705486.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-06
AI Technical Summary
In many existing coating processes, the uncoated foil (empty foil) in the middle is softer due to the lack of coating support, resulting in unpredictable deformation during slitting, affecting the dimensional accuracy and consistency of the slitting width, and thus affecting battery production efficiency and performance.
The coated foil slitting device is adopted, which includes a first slitting mechanism, a correction mechanism and a second slitting mechanism. The coated foil is corrected on one side and slit twice to ensure the accuracy of the final slitting width.
By slitting and correcting the position of the coated foil twice, the problem of dimensional instability in the slitting width direction is solved, the accuracy of the slitting width is ensured, and the dimensional accuracy and consistency of battery production are improved.
Smart Images
Figure CN223369567U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of battery production equipment, in particular to a coated foil slitting device and cutting equipment. Background Art
[0002] Amidst the booming new energy vehicle industry, power batteries, as the key driving force behind this industry, have become a focus of attention both within and outside the industry regarding their performance and safety. Pole sheets, essential battery components, are produced through a general process: slurry is coated on metal foil, forming a coated area and a bare foil area. After the strip is dried and rolled, the bare foil area is cut to form tabs. Finally, the strip is slit to form the pole sheets.
[0003] In the prior art, to improve production efficiency, a multi-strip coating process is commonly used to coat metal foil with slurry. This involves applying multiple coating strips to the foil at intervals, leaving blank areas between adjacent coating strips. After drying and rolling, the multiple coated strips are then slit with a single knife and single correction. However, this process faces a technical challenge in practical application that needs to be addressed. During the multi-strip coating process, the uncoated foil in the middle (i.e., the bare foil) lacks the support of the coating and is therefore softer than the coated areas on either side. This difference in physical properties is particularly pronounced during the subsequent slitting process, as the cutting force exerted by the cutter on the foil during slitting can easily cause unpredictable deformation of the relatively soft bare foil in the middle. This deformation makes it difficult to precisely control the widthwise dimensions and causes fluctuations in the slitting width, seriously affecting the dimensional accuracy and consistency of the product. This unstable slitting width further exacerbates the difficulty and cost of subsequent battery cell manufacturing processes. For example, during the battery cell winding and welding process, inconsistently sized pole pieces can lead to assembly difficulties and poor contact, thereby reducing battery production efficiency and yield. In addition, dimensional fluctuations may also have an adverse impact on key performance indicators such as the battery's energy density and cycle life, weakening the product's market competitiveness.
[0004] To address these issues, the industry has proposed several improvements, such as increasing the rigidity of the blank foil by adding support structures or optimizing the design of the slitting tool to reduce additional deformation of the blank foil. However, these approaches often come with drawbacks such as increased structural complexity, increased costs, or limited effectiveness. Therefore, to overcome the shortcomings of the existing technology, this application proposes a new slitting device based on the existing technology. Utility Model Content
[0005] The purpose of this utility model is to provide a coated foil slitting device and cutting equipment to address the above-mentioned shortcomings. This device solves the problem of unstable slitting width due to the softness of the hollow foil in the middle of the coating process. It can achieve double-sided correction and double slitting of multiple coated foils to ensure the accuracy of the final slitting width. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:
[0006] A coated foil slitting device comprises a first slitting mechanism, a correcting mechanism and a second slitting mechanism; the correcting mechanism is arranged between the first slitting mechanism and the second slitting mechanism along a first direction, and the first direction is parallel to the transmission direction of the coated foil; the coated foil comprises a coating area and an empty foil area, and the first slitting mechanism slits the empty foil area to form a plurality of coated foil monomers; the correcting mechanism is arranged on one side of at least one of the coated foil monomers, and is used to monitor the position and correct the deviation of the plurality of coated foil monomers after slitting; the second slitting mechanism slits the coating area of the plurality of coated foil monomers.
[0007] Furthermore, it also includes a first sensor; a first sensor is provided in front of the input end of the first slitting mechanism; in the second direction, the first sensor is located on at least one side of the edge position of the coated foil, and is used to monitor the position of the edge of one side of the coated foil, and the second direction is perpendicular to the transmission direction of the coated foil.
[0008] Furthermore, the first slitting mechanism includes a first bracket and a first slitting piece. The first slitting piece is detachably connected to the first bracket, and the first bracket is used to support the first slitting piece.
[0009] Furthermore, the correction mechanism includes a plurality of correction components; the correction components correspond to the coated foil monomers one by one, and are used to monitor the position and correct the corresponding coated foil monomers after slitting.
[0010] Furthermore, the correction component includes an electrically connected second sensor and an actuator; in the first direction, the second sensor is arranged on at least one side of the actuator, and in the second direction, the second sensor is located on at least one side of the edge position of the coated foil monomer, for monitoring the edge position of the corresponding coated foil monomer; the actuator can receive the signal of the second sensor to adjust the position of the corresponding coated foil monomer.
[0011] Furthermore, the actuator includes a clamping unit; the clamping unit includes two movably connected traction rollers and a drive unit; in the third direction, the two traction rollers are respectively arranged on both sides of the coated foil monomer; the output end of the drive unit is drivably connected to one of the traction rollers, and is used to drive one traction roller close to or away from the other traction roller to clamp or release the coated foil monomer, and the third direction is perpendicular to the transmission plane of the coated foil, and is respectively perpendicular to the first direction and the second direction.
[0012] Furthermore, the actuator also includes a slide rail screw motor; the clamping unit is arranged on the slide rail screw motor through a bracket; the slide rail screw motor drives the bracket to drive the clamping unit to move in the second direction, so as to adjust the position of the coated foil monomer.
[0013] Furthermore, the correction mechanism also includes a controller; the controller is used to receive data from the second sensor and send corresponding control signals to the actuator.
[0014] Furthermore, the second slitting mechanism includes a second bracket and a plurality of second slitting pieces; the plurality of second slitting pieces are detachably connected to the second bracket; and the plurality of second slitting pieces correspond one-to-one to the plurality of coated foils.
[0015] A cutting device comprises a conveying device and the above-mentioned coated foil slitting device, wherein the conveying device is used for conveying the coated foil, and the coated foil slitting device is used for slitting the coated foil.
[0016] The beneficial effects of the utility model are:
[0017] The utility model discloses a coated foil slitting device, comprising a first slitting mechanism, a deflection correction mechanism, and a second slitting mechanism; the deflection correction mechanism is arranged between the first slitting mechanism and the second slitting mechanism along a first direction, and the first direction is parallel to the transmission direction of the coated foil; the coated foil comprises a coating area and an empty foil area, and the first slitting mechanism slits the empty foil area to form a plurality of coated foil monomers; the deflection correction mechanism is arranged on one side of at least one of the coated foil monomers, and is used to monitor the position and correct the deflection of the plurality of coated foil monomers after slitting; the second slitting mechanism slits the coating area of the plurality of coated foil monomers. The coated foil slitting device and cutting equipment of the utility model solve the problem of unstable dimensional in the slitting width direction caused by the softness of the empty foil in the middle in the multi-coating process, and ensures the accuracy of the final slitting width by correcting the deflection of the coated foil on one side twice. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic structural diagram of the coated foil slitting device of the utility model;
[0019] Figure 2 It is a schematic diagram of the structure of the cutting equipment;
[0020] In the accompanying drawings: 1-first slitting mechanism, 11-first bracket, 12-first slitting piece, 2-correcting mechanism, 21-correcting assembly, 211-second sensor, 212-actuator, 3-second slitting mechanism, 31-second bracket, 32-second slitting piece, 4-first sensor. DETAILED DESCRIPTION
[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.
[0022] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.
[0023] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0024] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of such features.
[0026] In this application, the directions used are defined as follows:
[0027] The first direction is parallel to the transport direction of the coated foil, i.e. Figure 1 、 Figure 2 The X direction in .
[0028] The second direction is perpendicular to the transport direction of the coated foil, i.e. Figure 1 in the Y direction.
[0029] The third direction is perpendicular to the transport plane of the coated foil and perpendicular to the first direction and the second direction, namely Figure 2 The Z direction in .
[0030] Example 1:
[0031] See attached Figure 1 . Figure 1 The specific structure of the coated foil slitting device of the present invention is shown. The coated foil slitting device of the present invention comprises a first slitting mechanism 1, a deflection correction mechanism 2, and a second slitting mechanism 3. The coated foil includes a coated area and a bare foil area. The first slitting mechanism 1 slits the bare foil area, which has multiple coating strips, and then slits the entire strip of foil into multiple coated foil strips, forming multiple strips of foil coated with a single coating strip. The second slitting mechanism 3 is used to separately slit the coated area of each coated foil strip formed after slitting.
[0032] Along the first direction (i.e. Figure 1 、 Figure 2 In the X direction), a correction mechanism 2 is provided between the first slitting mechanism 1 and the second slitting mechanism 3. The correction mechanism 2 can be provided on one side of the coated foil monomer, or on both sides of the coated foil monomer. Since the empty foil area is relatively soft, when the first slitting mechanism 1 slits the empty foil area, it may cause the size of the coated foil monomer in the width direction to fluctuate. At this time, the correction mechanism 2 will monitor the position of each coated foil monomer formed after slitting, and perform position correction on the coated foil monomer with position deviation. When the second slitting mechanism 3 slits the coated foil monomer, it slits the middle position of the coating area of the coated foil monomer, thereby ensuring that the final coating area width is consistent after the coated foil monomer is cut. A slitting device of the utility model solves the problem of unstable slitting width direction size caused by the softness of the middle empty foil in multiple coating processes, and ensures the accuracy of the final slitting width by slitting and position correction of the coated foil twice.
[0033] Specifically, the slitting device further includes a first sensor 4. The first sensor 4 is arranged in front of the input end of the first slitting mechanism 1 and is Figure 1 The first sensor 4 is located on one side or both sides of the edge of the coated foil. When the first sensor 4 is in operation, it is aligned with the edge line of the coated foil passing through the slitting device to monitor the relative position of the edge line of the coated foil with respect to the first slitting mechanism 1. With the edge line of the coated foil as a reference, when the coated foil enters the first slitting mechanism 1 to be slit, the center of the empty foil area of the coated foil is ensured to be slit as much as possible.
[0034] Specifically, the first slitting mechanism 1 includes a first bracket 11 and a first slitting piece 12. The first slitting piece 12 is detachably provided on the first bracket 11. The first bracket 11 is used to support and position the first slitting piece 12. Through the first sensor 4, the center position of the empty foil area of the coated foil is ensured to pass through the first slitting piece 12 as much as possible. The first slitting piece 12 is a cutter, which cuts the empty foil area of the coated foil passing through, so that the entire foil coated with multiple coatings is cut into multiple coated foil monomers.
[0035] Specifically, the deflection-correcting mechanism 2 includes multiple deflection-correcting components 21, located in front of the input end of the second slitting mechanism 3. Each deflection-correcting component 21 corresponds to a plurality of coated foil strips after slitting. The deflection-correcting components 21 include a second sensor 211 and an actuator 212. In the first direction, the second sensor 211 is located on one or both sides of the actuator 212. In the second direction, the second sensor 211 is located on one or both sides of the edge of the coated foil strips.
[0036] In this embodiment, two second sensors 211 are provided, and both are provided on one side of the actuator 212 in the first direction. Preferably, both second sensors 211 are provided on the downstream side of the actuator 212 (e.g. Figure 2 As shown), since the second sensor 211 and the second slitting mechanism 3 are usually arranged on the same bracket, the closer the second sensor 211 is to the downstream second slitting mechanism 3, the more accurate the slitting effect of the second slitting mechanism 3 can be ensured; of course, it can be understood that the two second sensors 211 can also be arranged on the side upstream of the actuator 212 (such as Figure 1 As shown), the coated foil monomer can also be corrected in position before being cut by the second cutting mechanism 3, thereby ensuring that the cutting effect of the second cutting mechanism 3 is accurate.
[0037] In the second direction, two second sensors 211 are respectively arranged on both sides of the edge position of the coated foil monomer. When the second sensor 211 is working, it is aligned with the edge line of one side of the coated foil monomer after slitting, and monitors the position of the edge line of one side of the coated foil monomer relative to the second slitting mechanism 3. With the edge line of one side of the coated foil monomer as a reference, the center position of the coating area of the coated foil monomer is cut when entering the second slitting mechanism 3. When the position of the coated foil monomer deviates from the position when entering the second slitting mechanism 3, the second sensor 211 transmits a relevant signal to the actuator 212, and the actuator 212 adjusts the position of the corresponding coated foil monomer to ensure that the coated foil monomer is cut at the center position of the coating area after entering the second slitting mechanism 3.
[0038] Specifically, the actuator 212 includes a clamping unit and a guide rail screw motor. The clamping unit includes two movably connected traction rollers and a driving unit. Figure 2 The two traction rollers are respectively arranged on both sides of the coated foil monomer, one of which is connected to the output end of the driving unit, and the driving unit drives the traction roller to move up and down to move closer to or away from the other traction roller, thereby clamping or loosening the coated foil monomer. The two traction rollers are arranged on a bracket, and the bracket is then arranged on a guide screw motor. The guide screw motor drives the bracket to move in the second direction (i.e. Figure 1 The driving unit moves in the Y direction (in the Y direction), thereby driving the two pulling rollers to move in the second direction. When a deviation is detected in the position of the edge line of one side of the coated foil monomer, the driving unit drives the connected pulling roller to move closer to the other pulling roller, thereby clamping the coated foil monomer between the two pulling rollers. Then, the guide rail lead screw motor drives the bracket to move in the second direction, thereby driving the coated foil monomer between the two pulling rollers to move to the correct position.
[0039] Specifically, the correction mechanism 2 also includes a controller. When the second sensor 211 detects that the position of the coated foil monomer is deviated, a corresponding control signal is sent to the driving mechanism and the slide screw motor of the execution unit, and the execution unit then adjusts the position of the coated foil monomer.
[0040] Specifically, the second slitting mechanism 3 includes a second bracket 31 and a plurality of second slitting pieces 32. The plurality of second slitting pieces 32 are detachably connected to the second bracket 31. The second bracket 31 is used to support and position the second slitting pieces 32. Each second slitting piece 32 corresponds to a plurality of coated foil monomers. The second slitting piece 32 is a cutter. Under the action of the deviation correction mechanism 2, the middle position of the coated foil monomer passes through the second slitting piece 32 and is cut into two parts by the second slitting piece 32. When the two second sensors 211 are both set on the side downstream of the actuator 212 (such as Figure 2 As shown in the figure, the second sensor 211 and the second slitting piece 32 can be arranged on the same bracket, that is, both are arranged on the second bracket 31. In this way, the second sensor 211 is closer to the downstream second slitting piece 32, so that the slitting result of the second slitting piece 32 can be fed back to the actuator 212 in time. The actuator 212 will respond to the feedback signal in time and accurately correct the deviation of multiple coated foil monomers, thereby ensuring the accurate slitting effect of the second slitting mechanism 3.
[0041] Example 2:
[0042] See attached Figure 2 . Figure 2 The specific structure of the cutting device is shown, including a conveying device and a coated foil slitting device of Example 1. The conveying device is used to convey the coated foil, and the coated foil slitting device is used to slit the coated foil. Other mechanisms of the cutting device are well known to those skilled in the art, so they are not described in detail here.
[0043] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A coated foil slitting device, characterized in that: The invention comprises a first slitting mechanism (1), a deviation-correcting mechanism (2) and a second slitting mechanism (3); the deviation-correcting mechanism (2) is arranged between the first slitting mechanism (1) and the second slitting mechanism (3) along a first direction, and the first direction is parallel to the transmission direction of the coated foil; The coated foil comprises a coating area and a blank foil area, the first slitting mechanism (1) slits the blank foil area to form a plurality of coated foil monomers; the deviation correction mechanism (2) is arranged on one side of at least one of the coated foil monomers and is used to monitor the position and correct the deviation of the plurality of coated foil monomers after slitting; the second slitting mechanism (3) slits the coating areas of the plurality of coated foil monomers.
2. The coated foil slitting device according to claim 1, characterized in that: The invention also comprises a first sensor (4); the first sensor (4) is provided in front of the input end of the first slitting mechanism (1); in the second direction, the first sensor (4) is located on at least one side of the edge of the coated foil material, and is used to monitor the position of one side edge of the coated foil material, and the second direction is perpendicular to the transmission direction of the coated foil material.
3. The coated foil slitting device according to claim 1, characterized in that: The first slitting mechanism (1) comprises a first bracket (11) and a first slitting piece (12); the first slitting piece (12) is detachably connected to the first bracket (11); and the first bracket (11) is used to support the first slitting piece (12).
4. The coated foil slitting device according to claim 2, characterized in that: The deflection correction mechanism (2) comprises a plurality of deflection correction components (21); the deflection correction components (21) correspond one to one with the coated foil monomers and are used for position monitoring and deflection correction of the corresponding coated foil monomers after slitting.
5. The coated foil slitting device according to claim 4, characterized in that: The deflection correction component (21) comprises an electrically connected second sensor (211) and an actuator (212); in the first direction, the second sensor (211) is arranged on at least one side of the actuator (212); in the second direction, the second sensor (211) is located on at least one side of the edge position of the coated foil monomer, and is used to monitor the edge position of the corresponding coated foil monomer; the actuator (212) can receive a signal from the second sensor (211) to adjust the position of the corresponding coated foil monomer.
6. The coated foil slitting device according to claim 5, characterized in that: The actuator (212) includes a clamping unit; the clamping unit includes two movably connected pulling rollers and a driving unit; in a third direction, the two pulling rollers are respectively arranged on both sides of the coated foil monomer; the output end of the driving unit is connected to one of the pulling rollers for driving one pulling roller to move closer to or away from the other pulling roller to clamp or release the coated foil monomer, and the third direction is perpendicular to the transmission plane of the coated foil and is respectively perpendicular to the first direction and the second direction.
7. The coated foil slitting device according to claim 6, characterized in that: The actuator (212) further comprises a slide rail screw motor; the clamping unit is arranged on the slide rail screw motor via a bracket; the slide rail screw motor drives the bracket to drive the clamping unit to move in the second direction, so as to adjust the position of the coated foil monomer.
8. The coated foil slitting device according to claim 5, characterized in that: The deviation-correcting mechanism (2) further comprises a controller; the controller is used to receive data from the second sensor (211) and send a corresponding control signal to the actuator (212).
9. The coated foil slitting device according to claim 3, characterized in that: The second slitting mechanism (3) comprises a second bracket (31) and a plurality of second slitting pieces (32); the plurality of second slitting pieces (32) are detachably connected to the second bracket (31); and the plurality of second slitting pieces (32) correspond one-to-one to the plurality of coated foil monomers.
10. A cutting device, characterized in that: It comprises a conveying device and a coated foil slitting device according to any one of claims 1 to 9, wherein the conveying device is used to convey the coated foil, and the coated foil slitting device is used to slit the coated foil.