A device for improving the alignment of tabs

Abstract

The present application provides a device for improving the alignment of the pole tabs, and relates to the technical field of battery cell production. The device for improving the alignment of the pole tabs comprises a bracket, a kneading roller and a guide roller, wherein the kneading roller is rotatably arranged on the bracket, a movable plate is swingably arranged on the bracket, and the guide roller is rotatably arranged on the movable plate, the kneading roller is used to abut against the side of the battery cell body formed by winding, and the guide roller is used to abut the pole piece to be wound against the side of the battery cell body, which can improve the alignment of the pole tabs when the tail glue is attached.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell production, and in particular to a device for improving the alignment of tabs. Background Art

[0002] The main goal of lithium battery equipment development is to improve the quality of battery cell production, and one of the major research directions is to reduce the misalignment of the tabs and improve the alignment of the tabs. Currently, most methods to improve the alignment of the tabs are to align the tabs during the conveying process of the pole piece, but when the battery cell is wound and the workstation is changed to the tail glue, the tab alignment is no longer adjusted.

[0003] When the battery cell is wound and the workstation is changed to tail glue sticking, it is impossible to perform offline inspection on the continuously wound battery cell, but it is necessary to reduce the misalignment of the tabs. Therefore, there is an urgent need for a device that can improve the alignment of the tabs when tail glue sticking. Utility Model Content

[0004] The purpose of the present application includes, for example, providing a device for improving the alignment of the tabs, which can improve the alignment of the tabs when attaching tail glue.

[0005] This application can be implemented as follows:

[0006] The present application provides a device for improving the alignment of the pole lugs, which includes a bracket, a rubbing roller and a guide roller, wherein the rubbing roller is rotatably arranged on the bracket, a movable plate is swingably arranged on the bracket, and the guide roller is rotatably arranged on the movable plate. The rubbing roller is used to abut against the side of the wound battery cell body, and the guide roller is used to abut the pole piece to be wound against the side of the battery cell body.

[0007] Optionally, the device for improving the alignment of the tabs also includes a first driving source and a second driving source, wherein the first driving source is connected to the bracket, and is used to drive the bracket and the rubbing roller to approach or move away from the battery cell body to adjust the pressure applied by the rubbing roller to the battery cell body; the second driving source is connected to the movable plate, and is used to drive the movable plate to swing so that the guide roller approaches or moves away from the battery cell body to adjust the pressure applied by the guide roller to the battery cell body.

[0008] Optionally, the device for improving the alignment of the tabs includes a driving mechanism and a connecting plate, the driving mechanism is connected to the connecting plate, and the first driving source is arranged on the connecting plate.

[0009] Optionally, the driving mechanism further includes a motor and a screw mechanism, the motor is connected to the screw mechanism, and the screw mechanism cooperates with the connecting plate.

[0010] Optionally, the device for improving the alignment of the tabs further includes a first electrical proportional valve, the first driving source is a first cylinder, and the first cylinder is connected to the first electrical proportional valve.

[0011] Optionally, the second driving source is disposed on the bracket, and the second driving source is connected to the movable plate to drive the movable plate to swing.

[0012] Optionally, the device for improving the alignment of the tabs includes a second electrical proportional valve, the second driving source is a second cylinder, and the second cylinder is connected to the second electrical proportional valve.

[0013] Optionally, a fixing plate is provided at the bottom of the bracket, and the second driving source is provided on the fixing plate.

[0014] Optionally, a sensor for detecting the misalignment of the tab is provided on the bracket.

[0015] Optionally, the device for improving the alignment of the tabs includes a controller, and the controller is electrically connected to the sensor.

[0016] The beneficial effects of the device for improving the alignment of the pole ears of the present application include, for example: in order to improve the alignment of the pole ears when sticking tail glue, a device for improving the alignment of the pole ears is designed, the device for improving the alignment of the pole ears includes a bracket, a rubbing roller and a guide roller, the rubbing roller is rotatably arranged on the bracket, a movable plate is swingably arranged on the bracket, and the guide roller is rotatably arranged on the movable plate. When sticking tail glue on the battery cell, the rubbing roller is made to abut against the side of the battery cell body formed by winding, and the movable plate is swung at the same time so that the guide roller abuts the pole piece to be wound against the side of the battery cell body. Since the battery cell is always in a rotating state when sticking tail glue, the rubbing roller and the guide roller are driven to rotate relative to the battery cell, and the rubbing roller kneads the battery cell until the pole ears on the battery cell are aligned, which has the effect of improving the alignment of the pole ears. At the same time, the guide roller can play a role of guiding and flattening, thereby preventing the pole piece to be wound from sagging, and avoiding overlapping and wrinkling of the pole piece, and tail swinging and deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of a device for improving the alignment of tabs in an embodiment of the present application from a first viewing angle;

[0019] Figure 2It is a schematic diagram of a device for improving the alignment of tabs in an embodiment of the present application from a second viewing angle;

[0020] Figure 3 This is a schematic diagram of the battery cell before kneading in the embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the battery cell after being rubbed in an embodiment of the present application.

[0022] Icons: 1- bracket; 11- movable plate; 12- fixed plate; 2- kneading roller; 3- guide roller; 4- first driving source; 5- driving mechanism; 51- motor; 52- screw mechanism; 6- connecting plate; 7- second driving source; 8- battery cell body; 81- positive pole ear; 82- negative pole ear; 9- pole piece. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0028] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0029] The inventors of the present application discovered that when the battery cell is wound and then the workstation is changed to tail glue affixing, the battery cell is always in a rotating winding state, and the continuously wound battery cell cannot be inspected offline. If the battery cell has tab misalignment at this time, there is currently no effective measure to improve it. Therefore, how to solve the tab misalignment when tail glue affixing is performed on the battery cell has become an urgent problem to be solved.

[0030] Please refer to Figure 1-Figure 2 An embodiment of the present application provides a device for improving the alignment of the pole tabs, which includes a bracket 1, a rubbing roller 2 and a guide roller 3. The rubbing roller 2 is rotatably arranged on the bracket 1, and a movable plate 11 is swingably arranged on the bracket 1. The guide roller 3 is rotatably arranged on the movable plate 11. The rubbing roller 2 is used to abut against the side of the wound battery cell body 8, and the guide roller 3 is used to abut the pole piece 9 to be wound against the side of the battery cell body 8.

[0031] It should be pointed out that the kneading roller 2 is rotatably arranged on the bracket 1 around its own axis, the swinging plane of the movable plate 11 is a vertical plane, and the guide roller 3 is rotatably arranged on the movable plate 11 around its own axis; the battery cell includes a wound battery cell body 8 and a pole piece 9 to be wound, the kneading roller 2 is used to abut against the position directly below the battery cell body 8, and the guide roller 3 is used to press the pole piece 9 at the tail of the battery cell body 8 to one side of the battery cell body 8, thereby ensuring the smooth glue sticking of the battery cell tail.

[0032] When the cell is attached with glue at the tail, the kneading roller 2 is made to abut against the side of the cell body 8, and the movable plate 11 is swung at the same time, so that the guide roller 3 is also made to abut against the side of the cell body 8, and the guide roller 3 presses the pole piece 9 at the tail of the cell body 8 to one side of the cell body 8, so that the pole piece 9 is stably attached to the cell body 8 without swinging. Since the cell body 8 is always in a rotating state when the tail is attached with glue, the kneading roller 2 and the guide roller 3 are driven to rotate relative to the cell body 8. At this time, the kneading roller 2 kneads the cell until the pole ears on the cell are aligned, which has the effect of improving the alignment of the pole ears. At the same time, the guide roller 3 can play a guiding and flattening role, preventing the pole piece to be wound from sagging, avoiding the pole piece from overlapping and wrinkling, and swinging off.

[0033] It should be noted that if Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the battery cell before rubbing. Figure 4 It is a schematic diagram of the battery cell after kneading. The direction indicated by the arrow in the figure is the kneading direction. The pole ears on the battery cell include multiple positive pole ears 81 and multiple negative pole ears 82. Under the kneading action of the kneading roller 2, the multiple positive pole ears 81 are aligned with each other, and the multiple negative pole ears 82 are aligned with each other.

[0034] The device for improving the alignment of the tabs also includes a first driving source 4 and a second driving source 7. The first driving source 4 is connected to the bracket 1, and is used to drive the bracket 1 and the rubbing roller 2 to approach or move away from the battery cell body 8 to adjust the pressure applied by the rubbing roller 2 to the battery cell body 8; the second driving source 7 is connected to the movable plate 11, and is used to drive the movable plate 11 to swing, so that the guide roller 3 approaches or moves away from the battery cell body 8 to adjust the pressure applied by the guide roller 3 to the battery cell body 8.

[0035] When the battery cell needs to be kneaded, the first driving source 4 is used to drive the bracket 1 and the kneading roller 2 to approach and abut the battery cell body 8, and the first driving source 4 can adjust the pressure applied by the kneading roller 2 to the battery cell body 8. At the same time, the second driving source 7 is used to drive the movable plate 11 to swing forward, so that the guide roller 3 approaches and abuts the battery cell body 8, and the second driving source 7 can adjust the pressure applied by the guide roller 3 to the battery cell body 8 to achieve the best kneading effect; when the multiple positive pole ears 81 are aligned with each other, and the multiple negative pole ears 82 are aligned with each other, the first driving source 4 is used to drive the bracket 1 and the kneading roller 2 away from the battery cell body 8, and the second driving source 7 is used to drive the movable plate 11 to swing in the opposite direction, so that the guide roller 3 is away from the battery cell body 8.

[0036] The device for improving the alignment of the tabs further includes a driving mechanism 5 and a connecting plate 6 . The driving mechanism 5 is connected to the connecting plate 6 , and the first driving source 4 is disposed on the connecting plate 6 .

[0037] In this embodiment, the driving mechanism 5 includes a motor 51 and a screw mechanism 52 . The motor 51 is connected to the screw mechanism 52 , and the screw mechanism 52 cooperates with the connecting plate 6 .

[0038] It should be pointed out that the motor 51 is set on a fixed object such as the ground or a frame, and the output shaft of the motor 51 extends vertically upward and is transmission-connected to the screw mechanism 52. The screw mechanism 52 cooperates with the connecting plate 6. When the motor 51 is started, the screw mechanism 52 can drive the connecting plate 6, the first driving source 4 connected to the connecting plate 6, and the bracket 1, the rubbing roller 2 and the guide roller 3 connected to the first driving source 4 to rise and fall as a whole. When the bracket 1 rises to a predetermined position, the pressure applied by the rubbing roller 2 to the battery cell body 8 is adjusted by the first driving source 4, and the tightness inside the battery cell body 8 is adjusted to achieve the effect of adjusting the position of the pole ear.

[0039] In other embodiments, the driving mechanism 5 may also be other lifting mechanisms, which is not limited here.

[0040] In this embodiment, the device for improving the alignment of the tabs includes a first electrical proportional valve. The first driving source 4 is a first cylinder. The piston rod of the first cylinder extends vertically upward and is connected to the bracket 1. The first cylinder is connected to the first electrical proportional valve.

[0041] By setting up the first cylinder, the height of the bracket 1 can be easily adjusted to improve the flexibility of the entire device. When the piston rod of the first cylinder is extended and the first cylinder drives the bracket 1 to rise until the rubbing roller 2 abuts against the battery cell body 8, the height of the bracket 1 is adjusted to the right position, and the rubbing roller 2 can rub the battery cell body 8 at this time; when there is no need to rub the battery cell body 8, the piston rod of the first cylinder is retracted, the first cylinder drives the bracket 1 to descend, and the rubbing roller 2 is separated from the battery cell body 8.

[0042] By setting the first electrical proportional valve to control the first cylinder, the force with which the kneading roller 2 presses the battery cell body 8 can be adjusted to achieve the best kneading effect.

[0043] In other embodiments, the first driving source 4 may also be other lifting mechanisms, such as a motor screw mechanism, a cylinder lifting mechanism, etc., which is not limited here.

[0044] In this embodiment, the second driving source 7 is disposed on the bracket 1 , and the second driving source 7 is connected to the movable plate 11 to drive the movable plate 11 to swing.

[0045] In other embodiments, the second driving source 7 may also be disposed on a fixed object such as the ground or a rack.

[0046] In this embodiment, the device for improving the alignment of the tabs includes a second electrical proportional valve, and the second driving source 7 is a second cylinder, which is connected to the second electrical proportional valve.

[0047] It should be pointed out that one end of the movable plate 11 is hinged to the bracket 1, and the hinge axis of the movable plate 11 is coaxially connected to the rubbing roller 2, the piston rod of the second cylinder extends vertically upward and is connected to the other end of the movable plate 11, and the guide roller 3 is rotatably arranged at the other end of the movable plate 11.

[0048] When the second cylinder is started, the piston rod of the second cylinder extends, driving the movable plate 11 to swing upward with the hinge point with the bracket 1 as the axis, until the guide roller 3 presses the pole piece to the side of the battery cell body 8, ensuring that the battery cell body 8 does not swing out; when there is no need to rub the battery cell body 8, the piston rod of the second cylinder is retracted, thereby driving the movable plate 11 to swing downward with the hinge point with the bracket 1 as the axis, and the guide roller 3 is separated from the side of the battery cell body 8.

[0049] By setting a second electrical proportional valve to control the second cylinder, the force with which the guide roller 3 presses the cell body 8 can be adjusted, which plays a good role in guiding and flattening, preventing the pole piece to be wound from sagging, avoiding pole piece overlap and wrinkling, and tail swinging.

[0050] In other embodiments, the second driving source 7 may also be other lifting mechanisms, such as a motor screw mechanism, a cylinder lifting mechanism, etc., which is not limited here.

[0051] In this embodiment, a fixing plate 12 is disposed at the bottom of the bracket 1 , and the second driving source 7 is disposed on the fixing plate 12 .

[0052] The fixed plate 12 extends vertically downward at the bottom of the bracket 1, and the second cylinder is arranged on one side of the fixed plate 12. The piston rod of the second cylinder extends vertically upward and connects the movable plate 11. The fixed plate 12 serves to facilitate the installation of the second cylinder.

[0053] In this embodiment, a sensor for detecting the misalignment of the tab and a controller electrically connected to the sensor are disposed on the bracket 1 .

[0054] Exemplarily, the sensor is a visual sensor, which detects the misalignment of the tabs by taking pictures. When the visual sensor detects that the positive tab 81 and the negative tab 82 are aligned, the controller controls the kneading roller 2 and the guide roller 3 to descend and stop kneading the battery body 8.

[0055] Of course, it is understandable that the sensor may also be other types of sensors, such as a displacement sensor, etc., as long as it can detect the misalignment of the tab.

[0056] The controller can be set on the bracket 1 or outside the bracket 1. The controller is electrically connected to the sensor and can obtain the signal detected by the sensor in real time. In addition, the controller is also electrically connected to the motor 51, the first cylinder and the second cylinder. When the controller receives the signal of the pole ear alignment, the controller controls the motor 51, the first cylinder and the second cylinder to operate so that the rubbing roller 2 and the guide roller 3 are separated from the battery cell body 8, thereby avoiding the situation where the pole ear is reversely misaligned due to the rubbing roller 2 and the guide roller 3 not being separated from the battery cell body 8 in time.

[0057] In summary, the embodiment of the present application provides a device for improving the alignment of the pole ear. When the battery cell is affixed with tail glue, the motor 51 is started, and the screw mechanism 52 drives the connecting plate 6, the bracket 1, the kneading roller 2 and the guide roller 3 to rise synchronously; the first cylinder is started, and the first cylinder drives the bracket 1 to rise, so that the kneading roller 2 abuts against the side of the battery cell body 8, and at the same time, the second cylinder is started, and the second cylinder drives the movable plate 11 to swing, so that the guide roller 3 also abuts against the side of the battery cell body 8, and at the same time, the guide roller 3 presses the pole piece at the tail of the battery cell body 8 onto the battery cell. On one side of the body 8, the electrode piece is stably attached to the battery body 8 without swinging, thereby ensuring the stability of the tail glue; since the battery body 8 is always in a rotating state when the tail glue is attached, the kneading roller 2 and the guide roller 3 are driven to rotate relative to the battery body 8. At this time, the kneading roller 2 kneads the battery body 8 until the positive pole ear 81 and the negative pole ear 82 on the battery body 8 are aligned, thereby improving the alignment of the ear. The guide roller 3 plays a role in guiding and flattening, thereby generally reducing the risk of short circuit when welding the pole ears and improving the quality of the battery cell.

[0058] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A device for improving the alignment of tabs, characterized in that: It includes a bracket, a rubbing roller and a guide roller, the rubbing roller is rotatably arranged on the bracket, a movable plate is swingably arranged on the bracket, the guide roller is rotatably arranged on the movable plate, the rubbing roller is used to abut against the side of the wound battery body, and the guide roller is used to abut the pole piece to be wound against the side of the battery body.

2. The device for improving the alignment of the tabs according to claim 1, characterized in that: The device for improving the alignment of the tabs also includes a first driving source and a second driving source. The first driving source is connected to the bracket, and is used to drive the bracket and the rubbing roller to approach or move away from the battery cell body to adjust the pressure applied by the rubbing roller to the battery cell body; the second driving source is connected to the movable plate, and is used to drive the movable plate to swing, so that the guide roller approaches or moves away from the battery cell body to adjust the pressure applied by the guide roller to the battery cell body.

3. The device for improving the alignment of the tabs according to claim 2, characterized in that: The device for improving the alignment of the tabs further includes a driving mechanism and a connecting plate. The driving mechanism is connected to the connecting plate, and the first driving source is arranged on the connecting plate.

4. The device for improving the alignment of the tabs according to claim 3, characterized in that: The driving mechanism comprises a motor and a screw mechanism, the motor is connected to the screw mechanism, and the screw mechanism cooperates with the connecting plate.

5. The device for improving the alignment of the tabs according to claim 2, characterized in that: The device for improving the alignment of the tabs further includes a first electrical proportional valve. The first driving source is a first cylinder, and the first cylinder is connected to the first electrical proportional valve.

6. The device for improving the alignment of the tabs according to claim 2, characterized in that: The second driving source is disposed on the bracket, and the second driving source is connected to the movable plate to drive the movable plate to swing.

7. The device for improving the alignment of the tabs according to claim 6, characterized in that: The device for improving the alignment of the tabs includes a second electrical proportional valve, the second driving source is a second cylinder, and the second cylinder is connected to the second electrical proportional valve.

8. The device for improving the alignment of the tabs according to claim 6, characterized in that: A fixing plate is arranged at the bottom of the bracket, and the second driving source is arranged on the fixing plate.

9. The device for improving the alignment of the tabs according to claim 1, characterized in that: The bracket is provided with a sensor for detecting the misalignment of the tab.

10. The device for improving the alignment of the tabs according to claim 9, characterized in that: The device for improving the alignment of the tabs includes a controller, and the controller is electrically connected to the sensor.

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