Foil unwinding module

Abstract

The utility model discloses a foil unwinding module. The foil unwinding module comprises an isolation plate, a fixed part, a movable part and a deviation rectifying driving part. The fixing part is arranged on the back surface of the isolation plate; the movable part is movably arranged on the fixed part; an unwinding assembly is arranged on the moving part, and a material roll mounting position of the unwinding assembly penetrates through the isolation plate; the deviation rectifying driving part is arranged on the moving part; the driving end of the deviation rectifying driving part is connected to the isolation plate, and the deviation rectifying driving part can drive the moving part to move so as to drive the material roll mounting position of the unwinding assembly to be close to or away from the isolation plate. According to the foil unwinding module, the precision of attaching the foil to the pole piece material belt can be improved, and the welding precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to a foil unwinding module. Background Art

[0002] Pole piece and lug welding is a new process for lithium battery processing. Compared with the original technical process with copper (aluminum) foil as the base material, the base material of the current process is mostly non-metallic materials such as CP or AP with a small amount of copper (aluminum) at the lug. The battery cells produced by this new process are lighter, with more turns of battery cells of the same volume, low metal content and better safety. The pole piece and lug welding of lithium batteries requires the copper (aluminum) foil lugs to be welded to the front and back of the pole piece. The difficulty lies in the accuracy of the welding position of the positive and negative lugs, the overlap of the positive and negative lugs, the welding speed, welding power and the firmness after welding.

[0003] At present, before welding the pole piece and the pole tab, the pole tab foil needs to be attached to the pole piece and aligned. The unwinding accuracy of the existing foil unwinding equipment is low, and the pole piece and the pole tab foil are prone to deviation, affecting the welding accuracy. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a foil unwinding module, which can improve the accuracy of the foil being attached to the pole piece strip and improve the welding accuracy.

[0005] According to the first aspect of the embodiment of the utility model, the foil unwinding module comprises:

[0006] Isolation panels;

[0007] A fixing portion, arranged on the back side of the isolation plate;

[0008] A moving part, movably arranged on the fixed part; an unwinding assembly is arranged on the moving part, and a material roll installation position of the unwinding assembly passes through the isolation plate;

[0009] The deflection correction drive unit is arranged on the moving part; the driving end of the deflection correction drive unit is connected to the isolation plate, and the deflection correction drive unit can drive the material roll installation position of the unwinding assembly to move closer to or away from the isolation plate by driving the moving part to move.

[0010] A foil unwinding module according to an embodiment of the utility model has at least the following beneficial effects: the foil is arranged at the installation position of the unwinding assembly, and when the deviation correction drive unit is working, the driving end of the deviation correction drive unit pushes or pulls the isolation plate, so that the moving part moves in a direction away from the isolation plate or in a direction close to the isolation plate, thereby adjusting the distance between the foil and the isolation plate to realize foil correction.

[0011] According to some embodiments of the utility model, the unwinding assembly includes an unwinding bracket, an unwinding shaft and a first driver, the unwinding bracket is arranged on the moving part, the unwinding shaft is rotatably arranged on the unwinding bracket, and the first driver is connected to the unwinding shaft through a belt.

[0012] According to some embodiments of the utility model, the unwinding assembly includes a fixed seat, an adjustment seat and an adjuster, the fixed seat is arranged on the movable part, the adjustment seat is adjustably arranged on the fixed seat, and the first driver is arranged on the adjustment seat; the adjuster is arranged on the fixed seat and connected to the adjustment seat, and the adjuster can drive the driving shaft of the first driver to approach or move away from the unwinding shaft by driving the adjustment seat to move.

[0013] According to some embodiments of the present invention, the movable part and the fixed part are movably connected via a linear slide rail.

[0014] According to some embodiments of the present invention, the unwinding assembly further includes an inflatable shaft, the inflatable shaft is coaxially connected to the unwinding shaft, and the material roll mounting position is arranged on the inflatable shaft.

[0015] According to some embodiments of the utility model, it also includes a roller passing portion, which includes a cantilever shaft and a belt pressing assembly, the first end of the cantilever shaft is connected to the movable portion through a connecting bracket, and the second end of the cantilever shaft passes through the isolation plate to form a roller passing position; the belt pressing assembly is connected to the roller passing position through a connecting arm, and the pressure roller of the belt pressing assembly is arranged opposite to the roller passing position.

[0016] According to some embodiments of the utility model, a guide bearing is provided on the isolation plate, and the cantilever shaft passes through the guide bearing.

[0017] According to some embodiments of the utility model, a residual material detector is arranged on the cantilever shaft for detecting the outer diameter of the residual material of the material roll.

[0018] According to some embodiments of the present invention, the pressure roller is adjustably arranged along the length direction of the cantilever shaft.

[0019] According to some embodiments of the utility model, a movable base assembly is further included, the fixed portion is connected to the movable base assembly, and the movable base assembly can drive the fixed portion to move to drive the material roll installation position of the unwinding assembly to move closer to or away from the isolation plate.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of a foil unwinding module according to an embodiment of the utility model;

[0023] Figure 2 for Figure 1 An exploded view of the foil unwinding module after removing the roller portion is shown;

[0024] Figure 3 for Figure 1 Schematic diagram of the roller portion of the foil unwinding module;

[0025] Figure 4 for Figure 1 Schematic diagram of the belt pressing assembly of the foil unwinding module;

[0026] Figure 5 A schematic diagram of a foil unwinding module according to another embodiment of the utility model;

[0027] Figure 6 for Figure 5 A schematic diagram of the mobile base assembly is shown.

[0028] Reference numerals:

[0029] Isolation plate 100, guide bearing 110;

[0030] The fixing part 200, the linear guide rail 210, the first slider 220, and the limit block 230;

[0031] The moving part 300, the unwinding assembly 310, the unwinding bracket 311, the unwinding shaft 312, the first driver 313, the mounting plate 320, the fixing seat 330, the adjusting seat 340, the adjuster 350, the adjusting bolt 351, the shield 360, and the inflatable shaft 370;

[0032] A deviation correction driving unit 400;

[0033] A roller portion 410, a connecting bracket 420, a cantilever shaft 430, a roller position 431, and a residual material detector 440;

[0034] A belt pressing assembly 500, a pressing roller 510, and a movable bracket 520;

[0035] The movable base assembly 600 , the fixed base 610 , the guide rail 620 , the second slider 630 , the screw module 640 , the second driver 650 , the screw seat 660 , and the guide wheel 670 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.

[0038] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Pole piece and lug welding is a new process for lithium battery processing. Compared with the original technical process with copper (aluminum) foil as the base material, the base material of the current process is mostly non-metallic materials such as CP or AP with a small amount of copper (aluminum) at the lug. The battery cells produced by this new process are lighter, with more turns of battery cells of the same volume, low metal content and better safety. The pole piece and lug welding of lithium batteries requires the copper (aluminum) foil lugs to be welded to the front and back of the pole piece. The difficulty lies in the accuracy of the welding position of the positive and negative lugs, the overlap of the positive and negative lugs, the welding speed, welding power and the firmness after welding.

[0041] At present, before welding the pole piece and the pole tab, the pole tab foil needs to be attached to the pole piece and aligned. The unwinding accuracy of the existing foil unwinding equipment is low, and the pole piece and the pole tab foil are prone to deviation, affecting the welding accuracy.

[0042] In view of the technical problems existing in the related technology, the utility model proposes a foil unwinding module, which includes a fixed part, a movable part and a deviation correction drive part. The movable part is movably arranged on the fixed part, the deviation correction drive part is arranged on the movable part and is used to drive the movable part to move, the movable part is provided with an unwinding assembly, and the unwinding assembly is installed with foil. When the deviation correction movable part drives the movable part to move, the movable part will drive the unwinding assembly to move, so that the foil on the unwinding assembly moves along its width direction and aligns with the pole piece strip, thereby improving the accuracy of the foil being attached to the pole piece strip.

[0043] Reference Figures 1 to 4 The foil unwinding module includes an isolation plate 100, a fixed part 200, a moving part 300 and a deflection correction drive part 400. The fixed part 200 is a mounting bracket, and the isolation plate 100 is used to mount the fixed part 200. The function of the isolation plate 100 is to separate the foil roll from the deflection correction drive part 400 and related mounting structures to prevent the foil roll from being stuck. The mounting structures of the fixed part 200, the moving part 300 and the deflection correction drive part 400 are located on one side of the isolation plate 100, and the structure of the moving part 300 for mounting the foil passes through the isolation plate 100 and is located on the other side of the isolation plate 100. The deflection correction drive part 400 is arranged on the moving part 300 and its driving end is connected to the isolation plate 100.

[0044] It should be noted that, in the embodiment provided by the present invention, the deviation-correcting drive unit 400 is a cylinder assembly, and in other embodiments, the deviation-correcting drive unit 400 may also be a motor assembly.

[0045] It can be understood that the deflection-correcting driving unit 400 has two working modes, the first working mode is to push the isolation plate 100, and the second working mode is to pull the isolation plate 100. When in the first working mode, the moving part 300 is driven by the deflection-correcting driving unit 400 to move in a direction away from the isolation plate 100, so that the structure of the moving part 300 for installing the foil material is retracted in a direction close to the isolation plate 100; when in the second working mode, the moving part 300 is driven by the deflection-correcting driving unit 400 to move in a direction close to the isolation plate 100, so that the structure of the moving part 300 for installing the foil material is sent outward in a direction away from the isolation plate 100.

[0046] It should be noted that the fixed part 200 is installed on one side of the isolation plate 100, and the fixed part 200 is provided with a linear slide rail 210, and a plurality of first sliders 220 are provided on the linear slide rail 210, and the movable part 300 is installed on the first slider 220. The fixed part 200 is also provided with a limit block 230, which is installed on the side wall of the fixed part 200 and located at both ends of the linear slide rail 210 to limit the first slider 220 and prevent the first slider 220 from detaching from the linear slide rail 210.

[0047] Reference Figure 1 and Figure 2 The moving part 300 is provided with an unwinding assembly 310 and a mounting plate 320. The unwinding assembly 310 includes an unwinding bracket 311, an unwinding shaft 312 and a first driver 313. The mounting plate 320 is arranged on the top of the unwinding bracket 311. Both sides of the mounting plate 320 form a sliding fit with the fixed part 200 through the first slider 220. The body of the unwinding bracket 311 is arranged below the mounting plate 320 and is surrounded by the fixed part 200. The fixed part 200 protects the unwinding bracket 311. The unwinding shaft 312 is arranged in the unwinding bracket 311 and the mounting position of the unwinding shaft 312 for mounting the foil extends through the isolation plate 100 to the side of the isolation plate 100 away from the fixed part 200. The first driver 313 is arranged on the mounting plate 320 and drives the unwinding shaft 312 through a belt.

[0048] It should be noted that the moving part 300 is further provided with a fixed seat 330, an adjusting seat 340 and an adjuster 350. The fixed seat 330 is arranged above the mounting plate 320, the adjusting seat 340 is arranged on the fixed seat 330, the first driver 313 is arranged on the adjusting seat 340, and the first driver 313 can move along the vertical direction with the adjusting seat 340. The adjuster 350 is configured as an adjusting bolt 351, the bolt seat portion of the adjusting bolt 351 is arranged on the fixed seat 330, and the bolt portion of the adjusting bolt 351 is connected to the adjusting seat 340.

[0049] It is understandable that when the adjusting bolt 351 is turned, the adjusting seat 340 can move upward or downward, thereby driving the first driver 313 to move upward or downward, and the output shaft of the first driver 313 moves away from or close to the unwinding shaft 312, thereby tightening the belt connecting the first driver 313 and the unwinding shaft 312. Both the first driver 313 and the unwinding shaft 312 are provided with pulleys.

[0050] In addition, the moving part 300 is also provided with a shield 360, which is provided on the fixed seat 330 and surrounds the belt and the pulley to prevent dust and dirt. The unwinding shaft 312 is also provided with an air shaft 370, which is coaxially connected to the unwinding shaft 312, and the installation position of the unwinding shaft 312 for installing the foil is provided with an air shaft 370.

[0051] Reference Figure 1 , Figure 3 and Figure 4The foil unwinding module also includes a roller passing part 410, and the roller passing part 410 includes a cantilever shaft 430, a connecting bracket 420 and a belt pressing assembly 500. The connecting bracket 420 is fixedly mounted on the mounting plate 320, the first end of the cantilever shaft 430 is connected to the connecting bracket 420, and the second end of the cantilever shaft 430 passes through the isolation plate 100 to form a roller passing position 431, and the foil passes through the roller passing position 431. The belt pressing assembly 500 is connected to the roller passing position 431 through a connecting arm, and the belt pressing assembly 500 is used to cooperate with the roller passing position 431 to press the foil.

[0052] It should be noted that the belt pressing assembly 500 includes a pressure roller 510 and a movable bracket 520. The movable bracket 520 is arranged on the connecting arm and can move along the length direction of the cantilever shaft 430. The movable bracket 520 is provided with a cylinder, and the movable bracket 520 is driven to move by the cylinder. The pressure roller 510 is arranged on the movable bracket 520. The pressure roller 510 is located above the roller position 431 and is arranged opposite to the roller position 431.

[0053] It is understandable that the pressing roller 510 of the belt pressing assembly 500 can be driven by the cylinder to move toward the roller position 431 of the cantilever shaft 430 to press the foil passing through the roller position 431 so that the foil remaining in the belt path still maintains a certain tension during the roll changing process.

[0054] Reference Figure 3 and Figure 4 , a guide bearing 110 is provided on the isolation plate 100, and the cantilever shaft 430 passes through the guide bearing 110. The guide bearing 110 is used to provide support and guidance for the cantilever shaft 430, so as to facilitate the pressing roller 510 of the belt pressing assembly 500 to cooperate with the roller position 431 to press the tail end of the foil material belt. The guide bearing 110 is configured as a linear bearing, and the cantilever shaft 430 passes through the linear bearing and can move along the length direction of the linear bearing. The linear bearing can improve the stability of the movement of the cantilever shaft 430.

[0055] It should be noted that a residual material detector 440 is provided on the cantilever shaft 430 for detecting the outer diameter of the residual material of the foil material roll. The residual material detector 440 is generally an infrared sensor, which measures the outer diameter of the material roll by detecting the distance between the material roll and the residual material detector 440, thereby determining whether there is any residual material in the foil material roll.

[0056] The foil unwinding module described in the above embodiments is generally arranged on the inner side of the isolation plate 100, and is used to transport the foil to the inner side of the electrode strip. In other embodiments, there is also a foil unwinding module also arranged on the inner side of the isolation plate 100, which is used to transport the foil to the outer side of the electrode strip. The following is an explanation with specific embodiments.

[0057] Reference Figure 5 and Figure 6In addition to the structure of the above-mentioned embodiment, the foil unwinding module used to transport the foil to the outside of the electrode sheet strip also includes a movable base assembly 600, and the fixed part 200 is arranged on the movable base assembly 600. The movable base assembly 600 can drive the fixed part 200 to move to drive the material roll installation position of the unwinding assembly 310 to be close to or away from the isolation plate 100.

[0058] It should be noted that the movable base assembly 600 includes a fixed base 610, a guide rail 620, a second slider 630 and a screw module 640. The fixed base 610 is arranged on the isolation plate 100, the guide rail 620 is provided with a fixed base 610, the second slider 630 is movably arranged on the guide rail 620, the screw module 640 is also arranged on the fixed base 610, the fixed part 200 is arranged on the second slider 630 and connected to the screw seat 660 of the screw module 640, and the screw module 640 is provided with a second driver 650 to drive the screw seat 660. The fixed base 610 is also provided with a guide wheel 670, which is located at the end of the guide rail 620 and is used to guide the fixed part 200.

[0059] It is understandable that the function of the movable base assembly 600 is to adapt to foils of different widths. For example, after replacing a wider foil, the screw module 640 drives the screw seat 660 to move away from the isolation plate 100 under the action of the second driver 650, so that the fixed part 200 moves with the screw seat 660, and the movable part 300 provided on the fixed part 200 moves with the fixed part 200, so that the unwinding shaft 312 on the movable part 300 moves away from the isolation plate 100, and the position of the foil is adjusted so that the foil corresponds to the outer side of the wide-width pole piece strip.

[0060] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A foil unwinding module, characterized in that: include: Isolation panels; A fixing portion, arranged on the back side of the isolation plate; A movable part, movably arranged on the fixed part; The moving part is provided with an unwinding assembly, and the material roll installation position of the unwinding assembly passes through the isolation plate; The deflection correction drive unit is arranged on the moving part; the driving end of the deflection correction drive unit is connected to the isolation plate, and the deflection correction drive unit can drive the material roll installation position of the unwinding component to move closer to or away from the isolation plate by driving the moving part to move.

2. The foil unwinding module according to claim 1, characterized in that: The unwinding assembly includes an unwinding bracket, an unwinding shaft and a first driver. The unwinding bracket is arranged on the moving part. The unwinding shaft is rotatably arranged on the unwinding bracket. The first driver is transmission-connected to the unwinding shaft through a belt.

3. The foil unwinding module according to claim 2, characterized in that: The unwinding assembly includes a fixed seat, an adjustment seat and an adjuster, the fixed seat is arranged on the movable part, the adjustment seat is adjustably arranged on the fixed seat, and the first driver is arranged on the adjustment seat; the adjuster is arranged on the fixed seat and connected to the adjustment seat, and the adjuster can drive the driving shaft of the first driver to approach or move away from the unwinding shaft by driving the adjustment seat to move.

4. The foil unwinding module according to claim 1, characterized in that: The moving part and the fixed part are movably connected via a linear slide rail.

5. The foil unwinding module according to claim 2, characterized in that: The unwinding assembly also includes an inflatable shaft, which is coaxially connected to the unwinding shaft, and the material roll mounting position is arranged on the inflatable shaft.

6. The foil unwinding module according to claim 1, characterized in that: It also includes a roller passing portion, which includes a cantilever shaft and a belt pressing assembly, the first end of the cantilever shaft is connected to the movable portion through a connecting bracket, and the second end of the cantilever shaft passes through the isolation plate to form a roller passing position; the belt pressing assembly is connected to the roller passing position through a connecting arm, and the pressure roller of the belt pressing assembly is arranged opposite to the roller passing position.

7. The foil unwinding module according to claim 6, characterized in that: A guide bearing is arranged on the isolation plate, and the cantilever shaft passes through the guide bearing.

8. The foil unwinding module according to claim 6, characterized in that: The cantilever shaft is provided with a residual material detector for detecting the outer diameter of the residual material of the material roll.

9. The foil unwinding module according to claim 6, characterized in that: The pressing roller is adjustable along the length direction of the cantilever shaft.

10. The foil unwinding module according to any one of claims 1 to 9, characterized in that: It also includes a movable base assembly, the fixed part is connected to the movable base assembly, and the movable base assembly can drive the fixed part to move so as to drive the material roll installation position of the unwinding assembly to approach or move away from the isolation plate.

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