Pole piece roll changing device and roll changing method

Abstract

The application provides a pole piece roll changing device and a roll changing method. The pole piece roll changing device comprises a swing arm assembly, a laminating roller and a driving assembly. The laminating roller is rotatably arranged on the swing arm assembly. The swing arm assembly drives the laminating roller to move close to or away from the pole piece. The driving assembly is in driving connection with the laminating roller to drive the laminating roller to rotate. The pole piece roll changing device solves the problems of low roll changing efficiency and poor joint quality in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a pole piece roll changing device and a roll changing method. BACKGROUND

[0002] At present, with the rapid development of the new energy lithium battery industry, the speed requirement of lithium battery equipment is getting higher and higher, and the automatic roll changing of lithium battery receiving and unwinding equipment has become the industry mainstream, replacing the traditional manual roll changing mode. However, the existing automatic roll changing needs to reduce the running speed of the equipment to a low speed running state to complete the automatic roll changing, and there are problems such as low splicing success rate, too long residual material on the old roll, wrinkling and damage of the splicing area. SUMMARY

[0003] The main purpose of the present application is to provide a pole piece roll changing device and a roll changing method to solve the problems of low pole piece roll changing efficiency and poor joint quality in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a pole piece roll changing device is provided, comprising: a swing arm assembly; a laminating roller rotatably arranged on the swing arm assembly, wherein the swing arm assembly drives the laminating roller to move close to or away from the pole piece; and a driving assembly drivingly connected with the laminating roller to drive the laminating roller to rotate.

[0005] Further, the pole piece roll changing device further comprises: a passing roller assembly rotatably arranged on the swing arm assembly to guide the pole piece.

[0006] Further, the passing roller assembly comprises: a first passing roller arranged at the front end of the laminating roller in the moving direction of the pole piece; and a second passing roller arranged at the rear end of the laminating roller in the moving direction of the pole piece, wherein the pole piece moves and passes through the second passing roller, the laminating roller and the first passing roller in sequence.

[0007] Further, the pole piece roll changing device further comprises: a cutter assembly arranged on the swing arm assembly between the second passing roller and the laminating roller to cut the pole piece.

[0008] Further, the pole piece roll changing device further comprises: a limiting assembly arranged on the swing arm assembly to adjust the position of the laminating roller to be at the same horizontal position as the first passing roller and the second passing roller.

[0009] Further, the laminating roller is swingably arranged on the swing arm assembly.

[0010] Further, the pole piece roll changing device further comprises: a driving cylinder arranged on the swing arm assembly and drivingly connected with the laminating roller to drive the laminating roller to swing.

[0011] Further, the pole piece roll changing device further comprises: a first moving assembly, the first moving assembly is in driving connection with the new roll to drive the new roll to move; a first rotating assembly, the first rotating assembly is arranged on the first moving assembly and is in driving connection with the new roll to drive the new roll to rotate; a second moving assembly, the second moving assembly is in driving connection with the old roll to drive the old roll to move; and a second rotating assembly, the second rotating assembly is arranged on the second moving assembly and is in driving connection with the old roll to drive the old roll to rotate.

[0012] Further, the pole piece roll changing device further comprises: a swinging assembly, the swinging assembly is in driving connection with the swing arm assembly to drive the swing arm assembly to swing; and a detection assembly, the detection assembly is arranged on the swing arm assembly to detect the relative position between the new roll and the swing arm assembly, and to control the swinging assembly to drive the swing arm assembly to move according to the relative position.

[0013] Further, the pole piece roll changing device further comprises: a roll changing passing roller, the roll changing passing roller is arranged between the swing arm assembly and the old roll to adjust the horizontal height of the pole piece between the swing arm assembly and the old roll.

[0014] According to another aspect of the present application, a roll changing method is provided for connecting the pole piece on the new roll with the pole piece of the old roll, the roll changing is performed by using the pole piece roll changing device described above, and the roll changing method comprises: controlling the linear speed of the surface of the lamination roller, the moving speed of the pole piece on the old roll and the moving speed of the pole piece on the new roll to be consistent; after the pole piece on the new roll partially overlaps with the pole piece on the old roll, controlling the pole pieces at the overlapping position to be laminated by the lamination roller to connect the pole piece on the new roll with the pole piece on the old roll.

[0015] Further, the roll changing method further comprises: in response to the signal of the roll changing, the new roll approaches the pole piece roll changing device, and the old roll moves away from the pole piece roll changing device, and the moving speed of the pole piece on the new roll is controlled to be consistent with the moving speed of the pole piece on the old roll.

[0016] Further, the roll changing method further comprises: after the new roll and the old roll respectively move to the preset positions, the swing arm assembly on the pole piece roll changing device drives the lamination roller to be attached to the pole piece; after the detection assembly on the pole piece roll changing device detects the new roll, the swing arm assembly is controlled to stop moving; after the linear speed of the surface of the lamination roller, the moving speed of the pole piece on the old roll and the moving speed of the pole piece on the new roll are consistent, the driving assembly on the pole piece roll changing device drives the lamination roller to laminate the pole pieces at the overlapping position, and at the same time, the cutter assembly on the pole piece roll changing device cuts the pole piece.

[0017] The high-speed automatic pole piece roll changing device provided by the technical scheme of the application does not need to slow down the pole piece during roll changing, realizes the function of smoothly changing the roll in the normal operation process, and is composed of an auxiliary pole piece walking swing arm assembly, a matching pressure roller, a driving assembly, the matching pressure roller providing pressure for bonding the pole piece in the old roll and the pole piece in the new roll and smoothing the pole piece, a cutter assembly for cutting the pole piece in the old roll, a detection assembly for detecting the edge of the roll diameter of the new roll, a limiting assembly, a transmission shaft, etc. The driving assembly drives the matching pressure roller to rotate, so that the surface linear speed of the matching pressure roller matches the moving speed of the pole piece, thereby realizing the function of changing the new and old rolls of the pole piece without slowing down and improving the roll changing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application given below, make an explanation of the application, and do not constitute an improper limitation of the application. In the drawings:

[0019] Figure 1 A use state schematic diagram of an embodiment of the pole piece roll changing device according to the application is shown; and

[0020] Figure 2 A structure schematic diagram of an embodiment of the pole piece roll changing device of the application is shown.

[0021] Among them, the above drawings include the following reference signs:

[0022] 10, swing arm assembly; 11, transmission shaft; 20, matching pressure roller; 21, driving cylinder; 30, pole piece; 41, first passing roller; 42, second passing roller; 50, cutter assembly; 60, limiting assembly; 70, new roll; 80, old roll; 90, detection assembly; 91, roll changing passing roller. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] In order to solve the problems of low roll changing efficiency and poor joint quality in the prior art, the application provides a pole piece roll changing device and a roll changing method.

[0025] Please refer to Figure 1 and Figure 2 The pole piece roll changing device provided by the application comprises a swing arm assembly 10, a matching pressure roller 20 and a driving assembly. The matching pressure roller 20 is rotatably arranged on the swing arm assembly 10. The swing arm assembly 10 drives the matching pressure roller 20 to move close to or away from the pole piece 30. The driving assembly is drivingly connected with the matching pressure roller 20 to drive the matching pressure roller 20 to rotate.

[0026] The application provides a high-speed automatic polar piece roll changing device, which does not need to slow down the polar piece 30 during roll changing, realizes the function of smooth roll changing in normal operation, and comprises a swing arm assembly 10 for assisting the polar piece 30, a matching pressure roller 20, a driving assembly, the matching pressure roller 20 provides pressure for bonding the polar piece 30 in the old material roll 80 and the polar piece 30 in the new material roll 70 and simultaneously flattens the polar piece 30, a cutter assembly 50 for cutting the polar piece 30 in the old material roll 80, a detection assembly 90 for detecting the roll diameter edge of the new material roll 70, a limiting assembly 60, a transmission shaft 11 and the like. The application drives the matching pressure roller 20 to rotate through the driving assembly, so that the surface linear speed of the matching pressure roller 20 matches the moving speed of the polar piece 30, thereby realizing the function of completing the polar piece 30 roll material replacement without slowing down and improving the roll changing efficiency.

[0027] The polar piece roll changing device further comprises a passing roller assembly, which is rotatably arranged on the swing arm assembly 10 to guide the polar piece 30. The passing roller assembly comprises a first passing roller 41 and a second passing roller 42, the first passing roller 41 is arranged at the front end of the matching pressure roller 20 along the moving direction of the polar piece 30, and the second passing roller 42 is arranged at the rear end of the matching pressure roller 20 along the moving direction of the polar piece 30. The passing roller assembly greatly improves the stability of the tape connecting process and provides a strong guarantee for the cutter assembly 50 to smoothly cut the polar piece 30. In addition, the polar piece roll changing device further comprises a roll changing passing roller 91, which is arranged between the swing arm assembly 10 and the old material roll 80 to adjust the horizontal height of the polar piece 30 between the swing arm assembly 10 and the old material roll 80. The polar piece moves and sequentially passes through the roll changing passing roller 91, the second passing roller 42, the matching pressure roller 20 and the first passing roller 41. The roll changing passing roller 91 is adjustably arranged in the vertical direction to adjust the tension of the polar piece.

[0028] The polar piece roll changing device further comprises a cutter assembly 50, which is arranged on the swing arm assembly 10 between the second passing roller 42 and the matching pressure roller 20 to cut the polar piece. The cutter assembly 50 of the application can instantly cut the polar piece.

[0029] The polar piece roll changing device further comprises a limiting assembly 60, which is arranged on the swing arm assembly 10 to adjust the position of the matching pressure roller 20 to be at the same horizontal position as the first passing roller 41 and the second passing roller 42, so as to ensure that the matching pressure roller 20 is in the same plane in the retracted state and prevent the polar piece from being wrinkled.

[0030] The matching pressure roller 20 is swingably arranged on the swing arm assembly 10. The polar piece roll changing device further comprises a driving cylinder 21 and a mounting seat, the matching pressure roller 20 is rotatably arranged on the mounting seat, and the driving cylinder 21 is arranged on the swing arm assembly 10 and is drivingly connected with the mounting seat to drive the mounting seat to swing and drive the matching pressure roller 20 to swing.

[0031] When the detection assembly 90 detects that the roll needs to be replaced, the new roll needs to be moved to the roll replacement position, and the old roll needs to be moved out. Therefore, the pole piece roll replacement device further comprises a first moving assembly, a first rotating assembly, a second moving assembly and a second rotating assembly. The first moving assembly is drivingly connected with the new roll 70 to drive the new roll 70 to move. The first rotating assembly is arranged on the first moving assembly and is drivingly connected with the new roll 70 to drive the new roll 70 to rotate. The second moving assembly is drivingly connected with the old roll 80 to drive the old roll 80 to move. The second rotating assembly is arranged on the second moving assembly and is drivingly connected with the old roll 80 to drive the old roll 80 to rotate.

[0032] The pole piece roll replacement device further comprises a swinging assembly and a detection assembly 90. The swinging assembly is drivingly connected with the swing arm assembly 10 to drive the swing arm assembly 10 to swing. The detection assembly 90 is arranged on the swing arm assembly 10 to detect the relative position between the new roll 70 and the swing arm assembly 10, and to control the swinging assembly to drive the swing arm assembly 10 to move according to the relative position. The detection assembly 90 adopts a detection sensor. When the detection sensor detects that the roll diameter in the roll reaches a critical value that needs to be replaced, the new roll 70 with a large roll diameter is switched to be close to the automatic roll replacement device.

[0033] The application further provides a roll replacement method for connecting the pole pieces on the new roll 70 with the pole pieces on the old roll 80. The roll replacement is performed by using the pole piece roll replacement device. The roll replacement method comprises the following steps: controlling the linear velocity of the surface of the laminating roller 20, the moving speed of the pole pieces on the old roll 80 and the moving speed of the pole pieces on the new roll 70 to be consistent; thereby preventing the pole pieces from being wrinkled during the roll replacement; after the pole pieces on the new roll 70 partially overlap with the pole pieces on the old roll 80, controlling the laminating roller 20 to press the pole pieces at the overlapping position, so as to connect the pole pieces on the new roll 70 with the pole pieces on the old roll 80.

[0034] The roll replacement method further comprises the following steps: in response to the signal of the roll replacement, the new roll 70 is close to the pole piece roll replacement device, and the old roll 80 is away from the pole piece roll replacement device; and the moving speed of the pole pieces on the new roll 70 is controlled to be consistent with the moving speed of the pole pieces on the old roll 80, so that the speed of the pole pieces of the new roll 70 and the old roll 80 is kept consistent.

[0035] The roll replacement method further comprises the following steps: after the new roll 70 and the old roll 80 are moved to the preset positions respectively, the swing arm assembly 10 on the pole piece roll replacement device drives the laminating roller 20 to be close to the pole pieces; after the detection assembly 90 of the pole piece roll replacement device detects the new roll 70, the swing arm assembly 10 is controlled to stop moving; after the linear velocity of the surface of the laminating roller 20, the moving speed of the pole pieces on the old roll 80 and the moving speed of the pole pieces on the new roll 70 are consistent, the driving assembly on the pole piece roll replacement device drives the laminating roller 20 to press the pole pieces at the overlapping position; at the same time, the cutter assembly 50 on the pole piece roll replacement device cuts off the pole pieces.

[0036] As Figure 1 shown, the working sequence of the high-speed automatic pole piece roll changing device of the present application is as follows:

[0037] 1. When the roll diameter of the old roll 80 reaches the critical value requiring roll changing, the new roll 70 with large roll diameter is switched to the side close to the automatic roll changing device, and the old roll 80 with small roll diameter is switched to the side far from the automatic roll changing device as Figure 1 shown;

[0038] 2. The automatic roll changing device is slowly lifted, and when the detection assembly 90 detects the roll diameter edge of the new roll 70, the automatic roll changing device stops lifting and stays at the detection position;

[0039] 3. The line speed of the pole piece of the old roll 80 is controlled to be equal to the line speed of the new roll 70, and when the new roll 70 reaches the position for tape sticking, the driving cylinder 21 is driven to extend the cylinder to press the sticking and pressing roller 20 on the new roll 70; at the same time, the cutter assembly 50 is instantaneously popped out to cut off the pole piece, and the sticking and pressing roller 20 sticks and flattens the pole piece;

[0040] 4. The cutter assembly 50 is retracted, the cylinder of the driving cylinder 21 is retracted, and the high-speed automatic roll changing device slowly descends to the initial position

[0041] 5. The old roll 80 is retracted to change the roll with the tail material.

[0042] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0043] 1. The original automatic roll changing device has the problems of needing to reduce the speed to low speed, the remaining material on the old roll being too long, wrinkles in the tape area, and broken tape, and the use of the high-speed automatic roll changing device of the present application can effectively improve this situation;

[0044] 2. The high-speed automatic roll changing device makes the line speed of the rubber roller equal to the line speed of the old roll 80 before the rubber roller assembly presses the new roll 70, avoiding the risk of wrinkles and broken tape during the tape connecting process due to the speed lag of the rubber roller when pressing the new roll 70, and reducing the friction between the rubber roller and the new roll 70 to improve the service life of the rubber roller;

[0045] 3. The high-speed automatic roll changing device is provided with the over-roller assembly before and after the rubber roller assembly, greatly improving the stability of the tape connecting process and providing a strong guarantee for the smooth cutting of the pole piece by the cutter assembly 50;

[0046] 4. The high-speed automatic roll changing device can effectively improve the disadvantage of the tail material being too long in the old roll 80, which is beneficial to improving the utilization rate of the roll.

[0047] 1. The power for the rubber roller assembly to extrude the new material roll 70 is a cylinder assembly. In addition, the power for the rubber roller assembly can also be provided by an electric motor.

[0048] 2. A high-speed automatic roll changing device cutter assembly 50 uses a mechanical metal blade, and can also use air knife cutting or laser cutting;

[0049] 4. What are the key technical points and protected aspects of this invention?

[0050] 1. The method of making the linear speed of the rubber roller equal to that of the old material roll 80 before the rubber roller assembly extrudes the new material roll 70 can prevent wrinkling, damage and breakage during the splicing process.

[0051] 2. The rubber roller seat has adjustment and limiting devices on both sides to ensure that the rubber roller is parallel to the front and rear rollers when it is in the retracted state, thus preventing the substrate from wrinkling.

[0052] 3. The layout of having roller assemblies at both the front and rear of the rubber roller assembly improves the stability of the tape splicing process and facilitates the smooth cutting of the electrode sheets by the cutter assembly 50.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0055] In the description of the application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0056] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0057] In addition, it should be noted that the use of "first", "second" and the like to define parts only facilitates the differentiation of the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the application.

[0058] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. An electrode changing device, characterized in that, include: Swing arm assembly (10); A bonding roller (20) is rotatably mounted on a swing arm assembly (10), wherein the swing arm assembly (10) drives the bonding roller (20) to move closer to or away from the electrode sheet (30). A drive assembly is connected to the bonding roller (20) to drive the bonding roller (20) to rotate; The electrode changing device further includes: A roller guide assembly is rotatably mounted on the swing arm assembly (10) to guide the electrode sheet (30); The roller assembly includes: The first guide roller (41) is disposed at the front end of the bonding pressure roller (20) along the moving direction of the electrode sheet (30); The second roller (42) is disposed at the rear end of the bonding roller (20) along the moving direction of the electrode sheet (30); The electrode sheet (30) moves and passes sequentially through the second roller (42), the bonding roller (20), and the first roller (41).

2. The electrode changing device according to claim 1, characterized in that, The electrode changing device further includes: A cutter assembly (50) is disposed on the swing arm assembly (10) between the second pass roller (42) and the bonding pressure roller (20) for cutting the electrode sheet (30).

3. The electrode changing device according to claim 1, characterized in that, The electrode changing device further includes: A limiting component (60) is disposed on the swing arm assembly (10) to adjust the position of the bonding pressure roller (20) to be at the same horizontal position as the first passing roller (41) and the second passing roller (42).

4. The electrode changing device according to claim 1, characterized in that, The bonding roller (20) is oscillatingly mounted on the swing arm assembly (10).

5. The electrode changing device according to claim 4, characterized in that, The electrode changing device further includes: A drive cylinder (21) is mounted on the swing arm assembly (10) and drivenly connected to the bonding roller (20) to drive the bonding roller (20) to swing.

6. The electrode changing device according to claim 2, characterized in that, The electrode changing device further includes: A first moving component is driven connected to a new roll (70) to drive the new roll (70) to move; A first rotating component is disposed on the first moving component and drivenly connected to the new roll (70) to drive the new roll (70) to rotate; A second moving component is driven to connect to the scrap roll (80) to drive the scrap roll (80) to move; The second rotating component is disposed on the second moving component and drivenly connected to the old material roll (80) to drive the old material roll (80) to rotate.

7. The electrode changing device according to claim 6, characterized in that, The electrode changing device further includes: A swing assembly is driven to the swing arm assembly (10) to drive the swing arm assembly (10) to swing. A detection component (90) is disposed on the swing arm assembly (10) to detect the relative position between the new roll (70) and the swing arm assembly (10), and to control the swing assembly to drive the swing arm assembly (10) to move according to the relative position.

8. The electrode changing device according to claim 1, characterized in that, The electrode changing device further includes: A rewinding roller (91) is disposed between the swing arm assembly (10) and the old material roll (80) to adjust the horizontal height of the electrode sheet between the swing arm assembly (10) and the old material roll (80).

9. A method for changing coils, used to connect electrode sheets on a new coil (70) to electrode sheets on an old coil (80), characterized in that, The electrode rewinding device according to claim 7 is used for rewinding, and the rewinding method includes: The linear speed of the bonding roller (20), the moving speed of the electrode sheet on the old material roll (80), and the moving speed of the electrode sheet on the new material roll (70) are controlled to be consistent; After the electrode sheet on the new material roll (70) partially overlaps with the electrode sheet on the old material roll (80), the bonding roller (20) is controlled to press the electrode sheet at the overlap point to connect the electrode sheet on the new material roll (70) with the electrode sheet on the old material roll (80).

10. The roll changing method according to claim 9, characterized in that, The roll changing method also includes: In response to the rewinding signal, the new roll (70) moves closer to the electrode rewinding device, and the old roll (80) moves further away from the electrode rewinding device, and the moving speed of the electrode on the new roll (70) is controlled to be consistent with the moving speed of the electrode on the old roll (80).

11. The roll changing method according to claim 10, characterized in that, The roll changing method also includes: After the new roll (70) and the old roll (80) have moved to the preset positions respectively, the swing arm assembly (10) on the electrode changing device drives the bonding pressure roller (20) to bond into the electrode; Once the detection component (90) of the electrode changing device detects the new roll (70), it controls the swing arm component (10) to stop moving. Once the linear velocity of the bonding roller (20), the electrode moving speed on the old roll (80), and the electrode moving speed on the new roll (70) are consistent, the driving component on the electrode changing device drives the bonding roller (20) to press the electrode at the overlapping point. At the same time, the cutting component (50) on the electrode changing device cuts the electrode.

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