Battery pole piece deviation rectifying device
By designing a deviation correction device including a symmetrical bracket and a swing rod, the horizontal movement and inclination of the rollers can be used to achieve rapid deviation correction of the lithium-ion battery pole sheet, the problem of correction difficulties of traditional devices under high tensile strength substrates and large deviation conditions is solved, and the coating quality and efficiency are improved.
Patent Information
- Application Number
- CN202421663248.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The traditional lithium-ion battery pole sheet correction device is difficult to achieve effective deviation correction under high tensile strength substrates and large skew conditions, resulting in problems such as separation between the current collector and the deviation correction roller and slow correction speed.
A bias correction device including a left-right symmetric bracket and a swing rod is designed. By driving the swing rod to swing, the roller moves horizontally and inclines in a two-dimensional plane, thereby achieving horizontal and rotational correction of the pole sheet by using tension changes.
Fast position correction under high tensile strength substrate and large skew conditions is achieved, avoiding partial separation and wrinkling of the pole sheet from the roller, and improving the quality and efficiency of the pole sheet coating.
Smart Images
Figure CN222960828U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of lithium batteries, and particularly to a deviation rectifying device for battery electrode plates. Background Art
[0002] Lithium-ion batteries are new high-energy batteries using lithium intercalation compounds as the positive and negative electrode materials. Compared with lead-acid batteries and nickel-metal hydride batteries, they have a series of advantages such as high specific energy, high voltage, low self-discharge, good cycle performance, and long service life, and are increasingly attracting people's attention and are widely used in the electric field. Traditional lithium-ion batteries use a coating method to continuously manufacture electrode plates. Since the current collectors of the electrode plates mostly use soft foil materials and the deviation of the deviation rectifying rollers is small during transportation, the deviation rectifying device usually provides a small deviation rectifying tension and a small deviation rectifying amplitude. When the current collector of the electrode plate uses a substrate with high tensile strength and the deviation of the deviation rectifying rollers is large during the transportation of the electrode plate, problems such as the separation of the current collector from the deviation rectifying rollers and slow deviation rectifying speed will occur during large-amplitude deviation rectification of the traditional deviation rectifying device. Summary of the Utility Model
[0003] Aiming at the above problems, the utility model provides a deviation rectifying device for battery electrode plates. The deviation rectifying device for battery electrode plates is provided with symmetrically arranged left and right brackets and swing rods. Both ends of the roller are rotatably connected to the two swing rods respectively. The battery electrode plate extends vertically and adheres to the roller. By driving the two swing rods to swing, the roller moves horizontally and its axis tilts. While the overall tension of the electrode plate increases, the local tension of the part of the electrode plate at the rising position of the roller increases. The movement of the battery electrode plate is realized by using the tension change of the battery electrode plate adhering to the roller, and the position deviation rectification of the battery electrode plate is realized in a compound manner of horizontal deviation rectification and rotational deviation rectification. The deviation rectifying device has a simple structure and can adjust the deviation rectifying speed of the battery electrode plate.
[0004] The technical solution provided by the utility model is as follows:
[0005] According to the present utility model, a battery electrode sheet deviation rectifying device is provided, which includes a first bracket, a second bracket, a first swing rod, a second swing rod, a first connecting member, a second connecting member, a roller and a driving device. One end of the first swing rod is installed on the first bracket and the other end of the first swing rod is hinged to the first connecting member. One end of the second swing rod is installed on the second bracket and the other end of the second swing rod is hinged to the second connecting member. Both ends of the roller are respectively connected to the first connecting member and the second connecting member in a rotatable manner. The first bracket, the first swing rod and the second bracket, the second swing rod are symmetrically arranged along the midline of the battery electrode sheet deviation rectifying device. The first swing rod and the second swing rod are inclined towards each other and have the same length. A two-dimensional plane is formed by the first bracket and the second bracket, and the driving device drives the first swing rod or the second swing rod so that the first swing rod, the roller and the second swing rod swing in the two-dimensional plane. Specifically, during the double-sided coating process of the battery electrode sheet, the electrode sheet extends vertically and adheres to the roller. The electrode sheet may shift left and right on the roller, resulting in uneven tension of the electrode sheet, and further causing the electrode sheet to wrinkle and form wavy edges, thus leading to defects such as uneven coating of the electrode sheet. In the present utility model, the first bracket, the first swing rod, the first connecting member and the second bracket, the second swing rod, the second connecting member are in a substantially left-right symmetric form along the midline of the deviation rectifying device. The upper end of the swing rod is installed on the bracket so that the lower end of the swing rod can swing. The lower end of the swing rod is hinged to the connecting member, and the roller is connected to the connecting member in a rotatable manner. The vertical axes of the first bracket and the second bracket, for example, form a two-dimensional plane. The driving device can drive the swing rod to swing, and the first swing rod, the second swing rod, the first connecting member, the second connecting member and the roller all move in this two-dimensional plane. That is to say, the driving device is connected to the swing rod or the connecting member to drive the first swing rod or the second swing rod to swing, and then drive the roller to move in the two-dimensional plane. The movement of the roller in the two-dimensional plane can be decomposed into horizontal movement and inclined rotation. Due to the horizontal movement of the roller, the whole electrode sheet is stretched, the overall tension of the electrode sheet increases, and the whole electrode sheet will move towards the direction where the overall tension decreases; due to the inclined rotation of the roller, the local part of the electrode sheet is stretched, the local tension of the electrode sheet increases, and the electrode sheet will shift towards the side with larger local tension. Utilizing the principle that the electrode sheet tends to reduce the overall tension and approach consistency, the present utility model invents a deviation rectifying device that combines horizontal deviation rectification and rotational deviation rectification.
[0006] It should be noted here that the first bracket and the second bracket can be of a split structure or an integral structure. Preferably, the first bracket and the second bracket can respectively include a bracket base and an extending portion, and the extending portion is installed at the upper end of the bracket base. The first swing rod and the second swing rod can be installed on the extending portion, and the installation method can be hinged, sliding connection, etc. For example, the first swing rod and the second swing rod are installed on the extending portions of the first bracket and the second bracket in a hinged manner; or, the extending portion is provided with a sliding groove, the first swing rod and the second swing rod are provided with sliding blocks, and the sliding blocks are installed in the sliding groove in a slidable manner, and the sliding blocks can be fixed relative to the sliding groove.
[0007] According to an embodiment, in the normal state, the lower ends of the first swing rod and the second swing rod are inclined towards each other, the axis of the roller is arranged substantially horizontally, the first swing rod, the roller and the second swing rod form a waist, the shorter base and the other waist of an isosceles trapezoid, that is to say, the first swing rod and the second swing rod are respectively the two waists of the isosceles trapezoid, the roller is the shorter base of the isosceles trapezoid, and the axis of the roller is substantially in a horizontal state. The angle formed by the first swing rod and the vertical direction can be 0 to 45°, and the angle formed by the second swing rod and the vertical direction can be 0 to 45°. In the state where the driving device drives the first swing rod or the second swing rod to swing, when the first swing rod and the second swing rod swing towards the first bracket, the roller rotates and tilts while moving horizontally, the axis of the roller is in an inclined state, and the part of the roller connected to the first swing rod is lower than the part of the roller connected to the second swing rod. When the first swing rod and the second swing rod swing towards the second bracket, the roller rotates and tilts while moving horizontally, the axis of the roller is in an inclined state, and the part of the roller connected to the second swing rod is lower than the part of the roller connected to the first swing rod. That is to say, when the swing rod swings to the left, the roller moves to the left while the axis of the roller itself shows a state of lower on the left and higher on the right. At this time, the overall tension of the pole piece increases and the local tension of the right part of the pole piece increases. The pole piece moves towards the side where the overall tension decreases (to the right) and the local tension is larger (to the right), and the pole piece moves relative to the roller towards the right at a relatively fast speed by mutual superposition; when the swing rod swings to the right, the roller moves to the right while the axis of the roller itself shows a state of lower on the right and higher on the left. At this time, the overall tension of the pole piece increases and the local tension of the left part of the pole piece increases. The pole piece moves towards the side where the overall tension decreases (to the left) and the local tension is larger (to the left), and the pole piece moves relative to the roller towards the left at a relatively fast speed by mutual superposition.
[0008] According to another embodiment, in the normal state, the upper ends of the first swing rod and the second swing rod are inclined towards each other, the axis of the roller is arranged substantially horizontally, and the first swing rod, the roller, and the second swing rod form one waist, the longer base, and the other waist of an isosceles trapezoid. That is to say, the first swing rod and the second swing rod are respectively the two waists of the isosceles trapezoid, the roller is the longer base of the isosceles trapezoid, and the axis of the roller is substantially in a horizontal state. The angle formed by the first swing rod and the vertical direction can be 0 to 45°, and the angle formed by the second swing rod and the vertical direction can be 0 to 45°. In the state where the driving device drives the first swing rod or the second swing rod to swing, when the first swing rod and the second swing rod swing towards the first bracket, the roller rotates and tilts while moving horizontally, the axis of the roller is in an inclined state, and the part of the roller connected to the first swing rod is higher than the part of the roller connected to the second swing rod. When the first swing rod and the second swing rod swing towards the second bracket, the roller rotates and tilts while moving horizontally, the axis of the roller is in an inclined state, and the part of the roller connected to the second swing rod is higher than the part of the roller connected to the first swing rod. That is to say, when the swing rod swings to the left, the roller moves to the left while the axis of the roller itself shows a state of being higher on the left and lower on the right. At this time, the overall tension of the pole piece increases and the local tension of the left part of the pole piece increases. The pole piece moves towards the side where the overall tension decreases (slightly to the right) and the local tension is larger (continuously to the left), and the pole piece moves relative to the roller towards the left at a relatively slow speed; when the swing rod swings to the right, the roller moves to the right while the axis of the roller itself shows a state of being higher on the right and lower on the left. At this time, the overall tension of the pole piece increases and the local tension of the right part of the pole piece increases. The pole piece moves towards the side where the overall tension decreases (slightly to the left) and the local tension is larger (continuously to the right), and the pole piece moves relative to the roller towards the right at a relatively slow speed. In this case, due to the inclination of the roller axis, the tensions of the various parts of the pole piece wound on the roller change, and relative movement between the pole piece attached to the roller and the roller will occur, thereby correcting the position of the pole piece. After the position correction is completed, the swing rod can be restored to its original position, and the roller is restored to a horizontal state.
[0009] The first swing rod and the second swing rod can be telescopic rods whose lengths can be adjusted. By adjusting the lengths of the first swing rod and the second swing rod, the height of the roller can be flexibly adjusted.
[0010] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present invention.
[0011] The advantages of the present utility model are as follows:
[0012] 1) A composite deviation correction method combining horizontal deviation correction and rotational deviation correction is adopted, which can achieve rapid position deviation correction;
[0013] 2) The deviation correction speed of the pole piece can be flexibly adjusted;
[0014] 3) An adjustable swing rod structure is adopted, and the structure is simple;
[0015] 4) Under a large deviation correction angle, local separation and wrinkling between the pole piece and the roller are avoided. Description of the Drawings
[0016] Figure 1 Stereoscopic schematic diagram of a deviation correction device according to an embodiment of the present utility model;
[0017] Figure 2 Planar schematic diagram of the deviation correction device in a state without applied drive according to an embodiment of the present utility model;
[0018] Figure 3 Planar schematic diagram of the deviation correction device in a state with leftward drive applied according to an embodiment of the present utility model;
[0019] Figure 4 Planar schematic diagram of the deviation correction device in a state with rightward drive applied according to an embodiment of the present utility model;
[0020] Figure 5 Planar schematic diagram of the deviation correction device in a state without applied drive according to another embodiment of the present utility model;
[0021] Figure 6 Planar schematic diagram of the deviation correction device in a state with leftward drive applied according to another embodiment of the present utility model;
[0022] Figure 7 Planar schematic diagram of the deviation correction device in a state with rightward drive applied according to another embodiment of the present utility model.
[0023] List of Reference Numerals
[0024] 1a - First bracket
[0025] 1b - Second bracket
[0026] 101 - Bracket base
[0027] 102 - Extension part
[0028] 103 - Sliding groove
[0029] 2a - First swing rod
[0030] 2b - Second swing rod
[0031] 201 - Slide block
[0032] 3a - First connecting member
[0033] 3b - Second connecting member
[0034] 4 - Roller
[0035] 5 - Driving device Detailed implementation manners
[0036] The present utility model will be further described below in conjunction with the accompanying drawings through embodiments.
[0037] Figure 1 FIG. is a perspective view of a deviation rectifying device according to an embodiment of the present utility model. The deviation rectifying device includes a first bracket 1a, a second bracket 1b, a first swing rod 2a, a second swing rod 2b, a first connecting member 3a, a second connecting member 3b, a roller 4 and a driving device 5. The first bracket 1a and the second bracket 1b respectively include a bracket base 101 extending in the vertical direction and an extension 102 extending in the horizontal direction. The extension 102 is fixedly connected to the upper part of the bracket base 101. A long horizontal sliding groove 103 is provided on the extension 102. The first bracket 1a and the second bracket 1b are arranged in a left - right symmetric manner, and a two - dimensional plane is formed by the first bracket 1a and the second bracket 1b. One ends of the first swing rod 2a and the second swing rod 2b are respectively provided with slide blocks 201. The slide blocks 201 can be installed in the sliding groove 103 and slide in the sliding groove 103, and the swing rods can swing relative to the slide blocks. The other ends of the first swing rod 2a and the second swing rod 2b are respectively hinged to the first connecting member 3a and the second connecting member 3b. Relative rotation can occur between the first swing rod 2a and the first connecting member 3a, and relative rotation can occur between the second swing rod 2b and the second connecting member 3b. Both ends of the roller 4 are respectively connected to the first connecting member 3a and the second connecting member 3b, and the roller 4 can rotate relative to the first connecting member 3a and the second connecting member 3b. The driving device 5 is connected to the swing rod or the connecting member and can drive the swing rod to swing left and right. Through the swing of the swing rod, two - dimensional movement of the roller 4 in the two - dimensional plane can be achieved.
[0038] The pole piece extends in the vertical direction and adheres to the roller. The pole piece adhering to the roller can change its direction. For example, it can continue to extend in the horizontal direction. Since the pole piece is constantly moving, it is likely to cause the pole piece to deviate from the predetermined position. The pole piece deviating from the predetermined position in the left - right direction will result in deviation of the coating position of the pole piece. And the pole piece with its position shifted will cause uneven tension inside the pole piece, leading to wavy edges and wrinkles on the pole piece, thus causing uneven coating of the pole piece. By driving the swing rod through the driving device of the deviation rectifying device, the deviation rectification of the pole piece position can be achieved in a simple way, improving the quality and efficiency of pole piece coating.
[0039] Figure 2 FIG. is a schematic plan view of the deviation rectifying device according to an embodiment of the present invention in the state without applying driving force. When the driving device 5 does not apply driving force, the first bracket 1a, the first swing rod 2a, the first connecting piece 3a and the second bracket 1b, the second swing rod 2b, the second connecting piece 3b are in a state that is approximately left - right symmetric along the mid - line of the deviation rectifying device. The lengths of the first swing rod 2a and the second swing rod 2b are the same. The lower ends of the first swing rod 2a and the second swing rod 2b are inclined towards each other. The angle α between the first swing rod 2a and the vertical direction is approximately equal to the angle β between the second swing rod 2b and the vertical direction. The axis of the roller 4 is in a substantially horizontal state. The first swing rod 2a, the roller 4, and the second swing rod 2b form two waists and the shorter base of an isosceles trapezoid. By adjusting the position of the sliding block 201 in the sliding groove 103, the angles of α and β can be adjusted. After the angle adjustment is completed, the position of the sliding block 201 relative to the sliding groove 103 can be fixed.
[0040] Figure 3 FIG. is a schematic plan view of the deviation rectifying device according to an embodiment of the present invention in the state of applying left - hand driving force. The driving device 5 pushes the second swing rod 2b to the left. The second swing rod 2b swings to the left. The second swing rod 2b pushes the roller 4 to move to the left and tilts with the left side lower and the right side higher. The first swing rod 2a also swings to the left accordingly. The angle β between the second swing rod 2b and the vertical direction 1 is greater than the angle α between the first swing rod 2a and the vertical direction 1 . At this time, the overall tension of the pole piece increases and the local tension on the right side of the pole piece increases. The pole piece moves in a way that it moves towards the direction where the overall tension decreases (to the right) and the local tension is larger (to the right). Therefore, the pole piece can move quickly to the right in a superimposed manner.
[0041] Figure 4 FIG. is a schematic plan view of the deviation rectifying device according to an embodiment of the present invention in the state of applying right - hand driving force. The driving device 5 pulls the second swing rod 2b to the right. The second swing rod 2b swings to the right. The second swing rod 2b pulls the roller 4 to move to the right and tilts with the right side lower and the left side higher. The first swing rod 2a also swings to the right accordingly. The angle β between the second swing rod 2b and the vertical direction2 less than the angle α between the first swing rod 2a and the vertical direction 2 . At this time, the overall tension of the pole piece increases and the local tension on the left side of the pole piece increases. The pole piece moves in a direction towards the reduction of the overall tension (to the left) and the larger local tension (to the left), so the pole piece can move quickly to the left in a superimposed manner.
[0042] Figure 5 It is a schematic plan view of the deviation rectifying device according to another embodiment of the present invention in the state without applying driving force. When the driving device 5 does not apply driving force, the first bracket 1a, the first swing rod 2a, the first connecting piece 3a and the second bracket 1b, the second swing rod 2b, the second connecting piece 3b are in a state of being approximately left-right symmetric along the center line of the deviation rectifying device. The lengths of the first swing rod 2a and the second swing rod 2b are the same. The upper ends of the first swing rod 2a and the second swing rod 2b are inclined towards each other. The angle α between the first swing rod 2a and the vertical direction is approximately equal to the angle β between the second swing rod 2b and the vertical direction. The axis of the roller 4 is in a substantially horizontal state. The first swing rod 2a, the roller 4, and the second swing rod 2b form two waists and a longer base of an isosceles trapezoid. By adjusting the position of the sliding block 201 in the sliding groove 103, the angles of α and β can be adjusted, and after the angle adjustment is completed, the position of the sliding block 201 relative to the sliding groove 103 can be fixed.
[0043] Figure 6 It is a schematic plan view of the deviation rectifying device according to another embodiment of the present invention in the state of applying leftward driving force. The driving device 5 pushes the second swing rod 2b to the left. The second swing rod 2b swings to the left. The second swing rod 2b pushes the roller 4 to move to the left and tilts with the left side high and the right side low. The first swing rod 2a also swings to the left accordingly. The angle β between the second swing rod 2b and the vertical direction 1 less than the angle α between the first swing rod 2a and the vertical direction 1 . At this time, the overall tension of the pole piece increases and the local tension on the left side of the pole piece increases. The pole piece moves in a direction towards the reduction of the overall tension (slightly to the right) and the larger local tension (continuously to the left), so the pole piece can move to the left in a gentle manner.
[0044] Figure 7 It is a schematic plan view of the deviation rectifying device according to another embodiment of the present invention in the state of applying rightward driving force. The driving device 5 pulls the second swing rod 2b to the right. The second swing rod 2b swings to the right. The second swing rod 2b pulls the roller 4 to move to the right and tilts with the left side low and the right side high. The first swing rod 2a also swings to the right accordingly. The angle β between the second swing rod 2b and the vertical direction 2 is greater than the angle α between the first swing rod 2a and the vertical direction 2At this time, the overall tension of the electrode increases and the local tension on the right side of the electrode increases. The electrode moves in a direction towards the reduction of the overall tension (slightly to the left) and the larger local tension (continuously to the right), so the electrode can move to the right in a gentle manner.
[0045] The specific embodiments of the present invention are not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A battery pole piece correction device, characterized in that: The battery pole piece correcting device includes a first bracket, a second bracket, a first swing arm, a second swing arm, a first connecting piece, a second connecting piece, a roller and a driving device, one end of the first swing arm is installed on the first bracket and the other end of the first swing arm is hinged to the first connecting piece, one end of the second swing arm is installed on the second bracket and the other end of the second swing arm is hinged to the second connecting piece, two ends of the roller are respectively connected to the first connecting piece and the second connecting piece in a rotatable manner, the first bracket, the first swing arm and the second bracket, the second swing arm are symmetrically arranged along the center line of the battery pole piece correcting device, the first swing arm and the second swing arm are inclined toward each other and have the same length, the first bracket and the second bracket form a two-dimensional plane, and the driving device drives the first swing arm or the second swing arm to make the first swing arm, the roller and the second swing arm swing in the two-dimensional plane.
2. The battery pole piece deviation correction device according to claim 1, characterized in that: The first bracket and the second bracket respectively include a bracket base and an extension portion, and the extension portion is installed on the upper end of the bracket base.
3. The battery pole piece deviation correction device according to claim 2, characterized in that: The first swing arm and the second swing arm are respectively mounted on the extending portion of the first bracket and the extending portion of the second bracket in a hinged manner.
4. The battery pole piece deviation correction device according to claim 2, characterized in that: The protruding portion is provided with a sliding groove, and the first swing arm and the second swing arm are provided with sliding blocks. The sliding blocks are slidably installed in the sliding groove, and the sliding blocks can be fixed in position relative to the sliding groove.
5. The battery pole piece deviation correction device according to claim 1, characterized in that: In a normal state, the lower ends of the first swing rod and the second swing rod are inclined toward each other, the axis of the roller is arranged horizontally, and the first swing rod, the roller and the second swing rod constitute one waist, a shorter base and another waist of an isosceles trapezoid.
6. The battery pole piece deviation correction device according to claim 1, characterized in that: In a normal state, the upper ends of the first swing rod and the second swing rod are inclined toward each other, the axis of the roller is arranged horizontally, and the first swing rod, the roller and the second swing rod constitute one waist, a longer base and another waist of an isosceles trapezoid.
7. The battery pole piece deviation correction device according to claim 5 or 6, characterized in that: The angle formed by the first swing arm and the vertical direction is 0-45°, and the angle formed by the second swing arm and the vertical direction is 0-45°.
8. The battery pole piece deviation correction device according to claim 5, characterized in that: When the driving device drives the first swing arm or the second swing arm to swing, when the first swing arm and the second swing arm swing toward the first bracket, the axis of the roller is inclined, and the part where the roller is connected to the first swing arm is lower than the part where the roller is connected to the second swing arm; when the first swing arm and the second swing arm swing toward the second bracket, the axis of the roller is inclined, and the part where the roller is connected to the second swing arm is lower than the part where the roller is connected to the first swing arm.
9. The battery pole piece deviation correction device according to claim 6, characterized in that: When the driving device drives the first swing arm or the second swing arm to swing, when the first swing arm and the second swing arm swing toward the first bracket, the axis of the roller is inclined, and the part where the roller is connected to the first swing arm is higher than the part where the roller is connected to the second swing arm; when the first swing arm and the second swing arm swing toward the second bracket, the axis of the roller is inclined, and the part where the roller is connected to the second swing arm is higher than the part where the roller is connected to the first swing arm.
10. The battery pole piece deviation correction device according to claim 1, characterized in that: The first swing rod and the second swing rod are telescopic rods with adjustable lengths.