Lithium battery pole piece and pole lug welding equipment

Abstract

The utility model discloses a lithium battery pole piece and pole lug welding device which comprises a feeding module, a deviation rectifying module, a welding module, a cleaning module and a receiving module, the feeding module is provided with a pole piece unwinding module and a foil unwinding module which are sequentially arranged in the conveying direction of a pole piece material belt, the pole piece unwinding module is used for conveying the pole piece material belt, and the foil unwinding module is used for conveying the pole piece material belt. The foil unwinding module is used for conveying a tab foil to a tab of a pole piece material belt, the deviation rectifying module is arranged between the pole piece unwinding module and the foil unwinding module and used for adjusting the position of the pole piece material belt, and the welding module is arranged at the rear end, in the pole piece material belt conveying direction, of the foil unwinding module and used for welding the pole piece material belt and the tab foil to each other. The cleaning module and the material receiving module are sequentially arranged at the rear end of the welding module in the conveying direction of the pole piece material belt, the cleaning module is used for cleaning impurities on the surface of the pole piece material belt, and the material receiving module is used for rolling the pole piece material belt. The lithium battery pole piece and pole lug welding equipment can automatically complete the welding process, and the welding efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a lithium battery pole piece and ear welding device. 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] It is urgent to study a new type of welding equipment to solve the technical problems existing in the prior art. 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 provides a lithium battery pole piece and pole ear welding device, which can effectively improve the welding efficiency of the lithium battery pole piece and pole ear.

[0005] A lithium battery pole piece and tab welding device according to the first embodiment of the utility model includes:

[0006] A feeding module, which is provided with a pole piece unwinding module and a foil unwinding module in sequence along the conveying direction of the pole piece strip, wherein the pole piece unwinding module is used to convey the pole piece strip, and the foil unwinding module is used to convey the pole tab foil to the pole tab of the pole piece strip;

[0007] A deviation correction module is provided between the pole piece unwinding module and the foil material unwinding module, and the deviation correction module is used to adjust the angle and position of the pole piece strip;

[0008] A welding module is provided with a welding module, the welding module is arranged at the rear end of the foil unwinding module along the conveying direction of the pole piece strip, and the welding module is used to weld the pole piece strip and the pole tab foil to each other;

[0009] A cleaning module, disposed at the rear end of the welding module along the conveying direction of the electrode strip, the cleaning module being used to clean the surface impurities of the electrode strip after welding;

[0010] The material receiving module is arranged at the rear end of the cleaning module along the conveying direction of the pole piece material strip, and the material receiving module is used for flattening and winding the pole piece material strip.

[0011] A lithium battery pole piece and tab welding device according to an embodiment of the utility model has at least the following beneficial effects: the feeding module is used to convey the pole piece strip and the pole tab foil, during which the deviation correction module adjusts the position and angle of the pole piece strip relative to the pole tab foil to align the pole piece strip and the pole tab foil, and then the pole piece strip and the pole tab foil are conveyed to the welding module for welding the pole piece and the tab, and after the welding is completed, the cleaning module cleans the surface impurities of the pole piece strip, and finally the receiving module completes the winding of the pole piece strip, which can effectively improve the welding efficiency of the lithium battery pole piece and the tab.

[0012] According to some embodiments of the utility model, the cleaning module is provided with a brush dust removal module and an iron removal module in sequence along the conveying direction of the pole piece material strip, the brush dust removal module is used to clean the surface dust of the pole piece material strip, and the iron removal module is used to clean the welding slag of the pole piece material strip.

[0013] According to some embodiments of the utility model, the material receiving module is provided with a smoothing module and a winding module in sequence along the conveying direction of the pole piece strip, the smoothing module is used to flatten the pole piece strip, and the winding module is used to wind up the pole piece strip.

[0014] According to some embodiments of the utility model, the pole piece unwinding module includes a first unwinding component, a second unwinding component and an arc-shaped roller component, the first unwinding component is used to convey the pole piece material strip, the second unwinding component is used to temporarily store and replenish the pole piece material strip, and the arc-shaped roller component is used to change the shape of the pole piece material strip into an arc shape.

[0015] According to some embodiments of the utility model, the arc-shaped roller assembly is provided with two shaping rollers, a conveying channel and two mounting blocks, the two shaping rollers are arranged on both sides of the conveying channel, the mounting blocks are used to install and fix the shaping rollers, the first unwinding assembly and the second unwinding assembly can both convey the pole piece strip to the conveying channel, the pole piece strip can be shaped by the shaping rollers, and the pole piece strip after shaping can be sent out from the conveying channel.

[0016] According to some embodiments of the utility model, the correction module is provided with an unwinding correction module, a tension detection roller module and a tension swing arm module in sequence along the conveying direction of the pole piece material strip, the unwinding correction module is located at the rear end of the pole piece unwinding module along the conveying direction of the pole piece material strip, the unwinding correction module can adjust the position of the pole piece material strip, the tension detection roller module is used to detect the conveying tension of the pole piece material strip, and the tension swing arm module is used to swing the angle of the pole piece material strip.

[0017] According to some embodiments of the utility model, the unwinding and correcting module includes a first driver, a first limit member and a second limit member, the first limit member and the second limit member are both provided with a slot, the first limit member can be movably arranged on the first driver and can be driven by the first driver, the second limit member is fixedly arranged at a position opposite to the first limit member and is located in the moving direction of the first limit member, the pole piece strip is located between the first limit member and the second limit member, and is clamped in the slot.

[0018] According to some embodiments of the utility model, a belt splicing platform module is further provided between the unwinding correction module and the tension detection roller module, and the belt splicing platform module includes a belt splicing platform and two positioning members, the two positioning members are arranged on the belt splicing platform and arranged along the conveying direction of the pole piece material strip, and the positioning members are used to fix the pole piece material strip.

[0019] According to some embodiments of the utility model, the foil unwinding module includes an inner foil unwinding assembly and an outer foil unwinding assembly, the inner foil unwinding assembly is used to convey the foil to the inner side of the pole lug of the pole sheet material strip, and the outer foil unwinding assembly is used to convey the foil to the outer side of the pole lug of the pole sheet material strip, and the inner foil unwinding assembly and the outer foil unwinding assembly are both provided with a deviation correction drive unit, which is used to adjust the position of the pole lug foil in the width direction of the pole sheet material strip.

[0020] According to some embodiments of the utility model, the deviation correction drive unit is provided with a movable driving end and a second driver, the driving end is connected to the first mounting plate of the lithium battery pole piece and tab welding equipment, and the second driver can drive the driving end to move toward or away from the first mounting plate, so that the inner foil unwinding assembly or the outer foil unwinding assembly is close to or away from the first mounting plate, thereby adjusting the position of the tab foil along its width direction.

[0021] 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

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a schematic diagram of the internal working structure of a lithium battery pole piece and tab welding device according to an embodiment of the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of A is shown;

[0025] Figure 3 for Figure 1 A partial enlarged view of B is shown;

[0026] Figure 4 This is a schematic diagram of a foil unwinding module according to an embodiment of the utility model;

[0027] Figure 5 for Figure 4 An exploded view of the foil unwinding module after removing the roller portion is shown;

[0028] Figure 6 for Figure 4 Schematic diagram of the roller portion of the foil unwinding module;

[0029] Figure 7 for Figure 4 Schematic diagram of the belt pressing assembly of the foil unwinding module;

[0030] Figure 8 A schematic diagram of a foil unwinding module according to another embodiment of the utility model;

[0031] Fig. 9 for Figure 8 A schematic diagram of a mobile base assembly is shown;

[0032] Fig.10 This is a structural schematic diagram of a welding module according to an embodiment of the utility model;

[0033] Fig.11 This is a schematic structural diagram of a first mobile base according to an embodiment of the utility model;

[0034] Fig.12 This is a structural schematic diagram of a strip flattening assembly according to an embodiment of the utility model;

[0035] Fig.13 This is a structural schematic diagram of an auxiliary pressing assembly according to an embodiment of the utility model;

[0036] Fig.14 It is a schematic diagram of a state in which a pole piece strip passes through a strip flattening assembly according to an embodiment of the utility model;

[0037] Fig.15 It is a schematic diagram of an auxiliary pressing assembly and a strip flattening assembly pressing a pole piece strip in one embodiment of the utility model;

[0038] Fig.16 This is a structural schematic diagram of a welding module according to another embodiment of the utility model;

[0039] Fig.17 for Fig.15 A schematic diagram of the strip flattening assembly of the welding module is shown.

[0040] Reference numerals:

[0041] A first mounting plate 1, a pole sheet strip 2, and a pole tab foil 20;

[0042] Feeding module 100, pole piece unwinding module 110, first unwinding assembly 111, second unwinding assembly 112, arc-shaped roller assembly 113, shaping roller 1131, conveying channel 1132, mounting block 1133, foil unwinding module 120, inner foil unwinding assembly 121, inner upper foil unwinding assembly 1211, inner lower foil unwinding assembly 1212, outer foil unwinding assembly 122, outer upper foil unwinding assembly 1221, outer lower foil unwinding assembly 1222;

[0043] The fixing part 200, the linear slide rail 210, the first slider 220, the first limit block 230, the moving part 300, the unwinding assembly 310, the unwinding bracket 311, the unwinding shaft 312, the second driver 313, the second mounting plate 320, the fixing seat 330, the adjusting seat 340, the regulator 350, the adjusting bolt 351, the shield 360, the inflatable shaft 370, the deviation correction driving part 400, the third driver 401, the roller part 410, the connecting bracket 420, the cantilever shaft 430, the guide bearing 431, the roller position 432, the residual material detector 440, the belt pressing assembly 500, the pressing roller 510, the moving bracket 520, the moving base assembly 600, the fixed base 610, the first guide rail 620, the second slider 630, the screw module 640, the fourth driver 650, the screw seat 660, and the guide wheel 670;

[0044] Deviation correction module 2000, unwinding deviation correction module 2100, first driver 2110, first limiter 2120, second limiter 2130, tension detection roller module 2200, tension swing arm module 2300, tape connection platform module 2400, tape connection platform 2410, positioning member 2420;

[0045] Welding module 3000, ultrasonic roll welding assembly 3100, fixed bracket 3110, first movable base 3200, fixed bottom plate 3210, second limit block 3211, second guide rail 3212, slider 3213, lower slide plate 3214, top block 32140, fifth driver 3215, ruler assembly 3220, ruler body 3221, guide shaft 3222, guide block 3223, extension part 32230, locking handle 3224, pointer 3225, Ultrasonic welding unit 3300, welding mechanism 3310, material strip flattening assembly 3400, mounting base 3410, adjustment block 3420, bolt 3421, first roller assembly 3430, first roller 3431, second roller 3432, second roller assembly 3440, third roller 3441, fourth roller 3442, second movable base 3450; auxiliary pressing assembly 3500, adjustable bracket 3510, pressing body 3520, upper slide plate 3600;

[0046] Cleaning module 4000, brush dust removal module 4100, iron removal module 4200;

[0047] Material receiving module 5000, smoothing module 5100, and winding module 5200. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] refer to Figures 1 to 17 The lithium battery pole piece and ear welding equipment provided according to the embodiment of the utility model is described, and specific examples are listed below for illustration.

[0054] Reference Figure 1 The lithium battery pole piece and tab welding equipment is provided with a first mounting plate 1, which is used to install a feeding module 100, a deviation correction module 2000, a welding module 3000, a cleaning module 4000 and a receiving module 5000, wherein the feeding module 100 is provided with a pole piece unwinding module 110 and a foil unwinding module 120, and the pole piece unwinding module 110, the deviation correction module 2000, the foil unwinding module 120, the welding module 3000, the cleaning module 4000 and the receiving module 5000 are sequentially arranged along the conveying direction of the pole piece. The pole piece unwinding module 110 is used to convey the pole piece strip 2, the foil unwinding module 120 is used to convey the tab foil 20 to the side of the pole piece strip 2 to weld to form the tab, the deviation correction module 2000 is used to adjust the angle and position of the pole piece strip 2, and the welding module 3000 is used to weld the pole piece strip 2 and the tab foil 20. The cleaning module 4000 is used to clean the surface impurities of the electrode strip 2 after welding. It is provided with a brush dust removal module 4100 and an iron removal module 4200 in sequence along the conveying direction of the electrode strip 2. The brush dust removal module 4100 is used to clean the surface dust of the electrode strip 2, and the iron removal module 4200 is used to clean the welding slag of the electrode strip 2. The receiving module 5000 is used to flatten and reel the electrode strip 2. It is provided with a smoothing module 5100 and a reeling module 5200 in sequence along the conveying direction of the electrode strip 2. The smoothing module 5100 is used to flatten the electrode strip 2, and the reeling module 5200 is used to reel the electrode strip 2.

[0055] Reference Figure 1 and Figure 2The correction module 2000 is provided with an unwinding correction module 2100, a tension detection roller module 2200 and a tension swing arm module 2300. The unwinding correction module 2100 is located at the rear end of the pole piece unwinding module 110 along the conveying direction of the pole piece strip 2. The unwinding correction module 2100 can correct the position of the pole piece strip. The tension detection roller module 2200 is used to detect the conveying tension of the pole piece strip 2. The tension swing arm module 2300 is used to swing the angle of the pole piece strip 2.

[0056] It should be noted that the unwinding and correcting module 2100 includes a first driver 2110, a first stopper 2120 and a second stopper 2130, both of which are provided with a slot, the first stopper 2120 is movably provided on the first driver 2110 and can be driven by the first driver 2110, the second stopper 2130 is fixedly provided at a position opposite to the first stopper 2120 and located in the moving direction of the first stopper 2120, the pole piece strip 2 is located between the first stopper 2120 and the second stopper 2130 and is clamped in the slot. The first driver 2110 starts the first stopper 2120 to move in the direction of the second stopper 2130 to push the pole piece strip 2 to move, thereby adjusting the position of the pole piece strip 2.

[0057] Reference Figure 1 and Figure 3 A tape splicing platform module 2400 is also provided between the unwinding and correcting module 2100 and the tension detecting roller module 2200. The tape splicing platform module 2400 includes a tape splicing platform 2410 and two positioning members 2420. The two positioning members 2420 are provided on the tape splicing platform 2410 and are arranged along the conveying direction of the pole piece material strip 2. The positioning members 2420 are used to fix the pole piece material strip 2.

[0058] Reference Figure 1 and Figure 2 The pole piece unwinding module 110 includes a first unwinding component 111, a second unwinding component 112 and an arc-shaped roller component 113. The first unwinding component 111 is used to convey the pole piece tape 2, and the second unwinding component 112 is used to temporarily store the pole piece tape 2 and replenish the pole piece tape 2 on the first unwinding component 111 when it is used up. The process of replenishing the pole piece tape 2 is to send the pole piece tape on the second unwinding component 112 to the arc-shaped roller component 113, thereby replacing the pole piece tape on the first unwinding component 111, and the pole piece tape 2 continues to be conveyed along the original conveying path. The arc-shaped roller component 113 is used to change the shape of the pole piece tape 2 into an arc shape.

[0059] It should be noted that the arc-shaped roller assembly 113 is provided with two shaping rollers 1131, a conveying channel 1132 and two mounting blocks 1133. The two shaping rollers 1131 are arranged on both sides of the conveying channel 1132. The mounting blocks 1133 are used to install and fix the shaping rollers 1131. The first unwinding assembly 111 can convey the pole piece strip 2 to the conveying channel 1132, and is shaped from both sides by the two shaping rollers 1131. When the pole piece strip 2 on the first unwinding assembly 111 is used up, it is supplemented with the pole piece strip on the second unwinding assembly 112, and a manual or automatic robot delivers the pole piece strip 2 into the conveying channel 1132.

[0060] Reference Figure 1 The foil unwinding module 120 includes an inner foil unwinding assembly 121 and an outer foil unwinding assembly 122. The inner foil unwinding assembly 121 is used to convey the tab foil 20 to the inner side of the tab of the tab strip 2, and the outer foil unwinding assembly 122 is used to convey the tab foil 20 to the outer side of the tab of the tab strip 2. There are two inner foil unwinding assemblies 121, namely, an inner upper foil unwinding assembly 1211 and an inner lower foil unwinding assembly 1212. Similarly, there are two outer foil unwinding assemblies 122, namely, an outer upper foil unwinding assembly 1221 and an outer lower foil unwinding assembly 1222.

[0061] Reference Figure 4 In some embodiments, the inner upper foil unwinding assembly 1211 and the inner lower foil unwinding assembly 1212 both include a fixed portion 200, a movable portion 300, and a deflection correction drive portion 400. The fixed portion 200 is a bracket for mounting the movable portion, and the second mounting plate 320 is used to mount the fixed portion 200. The second mounting plate 320 is a part of the first mounting plate 1, that is, the second mounting plate 320 can be a plate mounted on the first mounting plate 1 for mounting the fixed portion 200, or can be a portion extending from the first mounting plate 1. The function of the second mounting plate 320 is to separate the tab foil 20 from the deflection correction drive portion 400 and related mounting structures to prevent the tab foil 20 from being stuck. The fixed portion 200, the mounting structure of the movable portion 300, and the deflection correction drive portion 400 are located on one side of the second mounting plate 320, and the structure of the movable portion 300 for mounting the tab foil 20 passes through the second mounting plate 320 and is located on the other side of the second mounting plate 320. The deflection-correcting driving unit 400 is disposed on the moving unit 300 and a driving end thereof is connected to the second mounting plate 320 .

[0062] It should be noted that the correcting drive unit 400 is also provided with a third driver 401, and the driving end of the correcting drive unit 400 is connected to the second mounting plate 320. The third driver 401 is used to drive the driving end of the correcting drive unit 400 to move toward or away from the second mounting plate 320. In the embodiment provided by the present utility model, the third driver 401 is a cylinder assembly. In other embodiments, the third driver 401 can also be a servo motor.

[0063] It can be understood that the deflection correction drive unit 400 has two working modes, the first working mode is to push the second mounting plate 320, and the second working mode is to pull the second mounting plate 320. When in the first working mode, the moving part 300 is driven by the deflection correction drive unit 400 to move in a direction away from the second mounting plate 320, so that the structure of the moving part 300 for mounting the foil material is retracted in a direction close to the second mounting plate 320; when in the second working mode, the moving part 300 is driven by the deflection correction drive unit 400 to move in a direction close to the second mounting plate 320, so that the structure of the moving part 300 for mounting the foil material is sent out in a direction away from the second mounting plate 320.

[0064] It should be noted that the fixed part 200 is mounted on one side of the second mounting plate 320, the fixed part 200 is provided with a linear slide rail 210, a plurality of first sliders 220 are provided on the linear slide rail 210, and the movable part 300 is mounted on the first slider 220. The fixed part 200 is also provided with a first limit block 230, which is mounted 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 being separated from the linear slide rail 210.

[0065] Reference Figure 4 and Figure 5 The moving part 300 is provided with an unwinding assembly 310, and the unwinding assembly 310 includes an unwinding bracket 311, an unwinding shaft 312 and a second driver 313. The unwinding bracket 311 has side wings on both sides of the top, and the side wings of the unwinding bracket 311 form a sliding fit with the fixed part 200 through the first slider 220. The body of the unwinding bracket 311 is surrounded by the fixed part 200, and the fixed part 200 plays a protective role on the unwinding bracket 311. The unwinding shaft 312 is arranged in the unwinding bracket 311, and the installation position of the unwinding shaft 312 for installing the pole tab foil 20 passes through the second mounting plate 320 and extends to the side of the second mounting plate 320 away from the fixed part 200. The second driver 313 is arranged on the second mounting plate 320 and drives the unwinding shaft 312 through a belt.

[0066] 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 on the unwinding bracket 311, the adjusting seat 340 is arranged on the fixed seat 330, the second driver 313 is arranged on the adjusting seat 340, and the second 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.

[0067] It is understandable that when the adjusting bolt 351 is turned, the adjusting seat 340 can move upward or downward, thereby driving the second driver 313 to move upward or downward, and the output shaft of the second driver 313 moves away from or close to the unwinding shaft 312, thereby tightening the belt connecting the second driver 313 and the unwinding shaft 312. Both the second driver 313 and the unwinding shaft 312 are provided with pulleys.

[0068] 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.

[0069] Reference Figure 4 , Figure 6 and Figure 7 The foil unwinding module 120 further includes a roller portion 410, which includes a cantilever shaft 430, a connecting bracket 420 and a belt pressing assembly 500. The connecting bracket 420 is fixedly mounted on the unwinding bracket 311, 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 second mounting plate 320 to form a roller position 432, through which the tab foil 20 passes. The belt pressing assembly 500 is connected to the roller position 432 through a connecting arm, and the belt pressing assembly 500 is used to cooperate with the roller position 432 to press the foil.

[0070] 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 432 and is arranged opposite to the roller position 432.

[0071] 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 432 of the cantilever shaft 430 to press the tab foil 20 passing through the roller position 432, so that the tab foil 20 remaining in the belt path can still maintain a certain tension during the roll changing process.

[0072] Reference Figure 6 and Figure 7 A guide bearing 431 is provided on the second mounting plate 320, and the cantilever shaft 430 passes through the guide bearing 431 and extends to the outside of the second mounting plate 320. The function of the guide bearing 431 is to provide support and guidance for the cantilever shaft 430, so that the pressure roller 510 of the belt pressing assembly 500 cooperates with the roller position 432 to press the tail end of the tab foil 20, so that during the belt changing process, the portion of the tab foil 20 located at the rear end of the foil unwinding module 120 is tensioned. The guide bearing 431 is configured as a linear bearing, and the cantilever shaft 430 is passed 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.

[0073] 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 tab foil roll. The residual material detector 440 is generally an infrared sensor, which measures the outer diameter of the roll by detecting the distance between the roll and the residual material detector 440, thereby determining whether there is any residual material of the tab foil roll.

[0074] The inner upper foil unwinding assembly 1211 and the inner lower foil unwinding assembly 1212 described in the above embodiments are generally arranged on the inner side of the second mounting plate 320, and are used to convey foil to the inner side of the pole sheet material strip 2. The outer upper foil unwinding assembly 1221 and the outer lower foil unwinding assembly 1222, which are also arranged on the inner side of the second mounting plate 320, are used to convey foil to the outer side of the pole sheet material strip 2. The structures of the outer upper foil unwinding assembly 1221 and the outer lower foil unwinding assembly 1222 are not much different from those of the inner upper foil unwinding assembly 1211 and the inner lower foil unwinding assembly 1212, and the main structural differences are as follows.

[0075] Reference Figure 8 and Fig. 9 The outer upper foil unwinding assembly 1221 and the outer lower foil unwinding assembly 1222 both include a movable base assembly 600, and the fixed portion 200 is disposed on the movable base assembly 600. The movable base assembly 600 can drive the fixed portion 200 to move to drive the material roll installation position of the unwinding assembly 310 to be close to or away from the second installation plate 320.

[0076] It should be noted that the mobile base assembly 600 includes a fixed base 610, a first guide rail 620, a second slider 630 and a screw module 640. The fixed base 610 is arranged on the second mounting plate 320. The first guide rail 620 is provided with a fixed base 610. The second slider 630 is movably arranged on the first 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. The screw module 640 is provided with a fourth 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 first guide rail 620 and is used to guide the fixed part 200.

[0077] It can be understood that the function of the movable base assembly 600 is to adapt to different widths of the pole piece strips 2. For example, after replacing the wider pole piece strip 2, the screw module 640 drives the screw seat 660 to move away from the second mounting plate 320 under the action of the fourth 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 second mounting plate 320, and the position of the outer pole tab foil 20 is adjusted, so that the outer pole tab foil 20 corresponds to the outer side of the wide pole piece strip 2.

[0078] Reference Fig.10 The welding module 3000 includes an ultrasonic roll welding assembly 3100, which includes a fixed bracket 3110, a first movable base 3200, and an ultrasonic welding unit 3300. The fixed bracket 3110 is disposed on the first movable base 3200, and the ultrasonic welding unit 3300 is disposed on the fixed bracket 3110. It can be understood that the fixed bracket 3110 can move toward the material strip on the first movable base 3200, so that the position of the ultrasonic welding unit 3300 for welding can be aligned with the position to be welded of the material strip, thereby improving the welding accuracy.

[0079] It should be noted that the first movable base 3200 includes a fixed base plate 3210, a lower slide plate 3214 and a driver 3215, and the ultrasonic welding unit 3300 is installed above the lower slide plate 3214 and fixed by fasteners such as screws. Fig.10As shown, the ultrasonic welding unit 3300 is provided with a welding mechanism 3310 that can be raised and lowered, and the welding mechanism 3310 can be raised or lowered according to the position of the material strip. A second guide rail 3212 and a slider 3213 are provided on the fixed bottom plate 3210, and the slider 3213 is movably arranged on the second guide rail 3212, and the lower slide plate 3214 is arranged above the slider 3213 and connected to the slider 3213. The driving mode of the fifth driver 3215 is screw transmission, and the fifth driver 3215 also includes a hand wheel. Turning the hand wheel can move the screw seat 660 on the screw assembly, and the lower slide plate 3214 is connected to the screw seat 660. The fifth driver 3215 can drive the lower slide plate 3214 to move to drive the ultrasonic welding unit 3300 to move in the Y-axis direction.

[0080] In addition, the driving method of the fifth driver 3215 is not limited to the manual driving method through the handwheel described above. In other embodiments, the fifth driver 3215 can also be an automatic driving method driven by a servo motor. Under the structure of this driving method, the servo motor is arranged at the original position of the handwheel and is connected to the screw transmission of the screw assembly.

[0081] Reference Fig.11 The first movable base 3200 further includes a ruler assembly 3220, which is used to calibrate the displacement of the lower slide plate 3214 relative to the fixed base plate 3210. It should be noted that the ruler assembly 3220 includes a ruler body 3221, a guide shaft 3222, a guide block 3223, a locking handle 3224 and a pointer 3225. The ruler body 3221 is arranged on the lower slide plate 3214, and the ruler body 3221 is configured as a ruler with a scale. The guide shaft 3222 is arranged on the fixed base 610, and the guide shaft 3222 is parallel to the ruler body 3221. The guide block 3223 is arranged on the lower slide plate 3214, and the guide block 3223 has an extension portion 32230 extending toward the guide shaft 3222. The extension portion 32230 is slidably matched with the guide shaft 3222, that is, the extension portion 32230 is provided with a through hole, and the guide shaft 3222 passes through the through hole. The locking handle 3224 is arranged on the guide block 3223, and the locking handle 3224 can be rotated under the action of an external force to lock and fix the guide block 3223 relative to the guide shaft 3222, and the locking handle 3224 is rotated so that the locking handle 3224 presses the guide shaft 3222 to achieve fixation. The structure of the guide block 3223 is not limited to the structure shown in the above-mentioned extension part 32230. In other embodiments, the guide block 3223 can also replace the through hole of the extension part 32230 with a slot, and the guide shaft 3222 can be movably arranged in the slot. The pointer 3225 is arranged on the guide block 3223 and points to the ruler body 3221.

[0082] It should be noted that the fixed bottom plate 3210 is further provided with a second limit block 3211, and the lower slide plate 3214 is further provided with a top block 32140 for cooperating with the second limit block 3211. When the lower slide plate 3214 moves to a position where the top block 32140 abuts against the second limit block 3211, the lower slide plate 3214 stops sliding. The second limit block 3211 is further provided with a buffer block to buffer the lower slide plate 3214.

[0083] It is understandable that the function of the scale assembly 3220 is to detect the moving distance of the lower slide 3214 when the first movable base 3200 is manually adjusted, that is, to detect the moving distance of the ultrasonic welding unit 3300 installed on the lower slide 3214. For example, the hand wheel of the driver 3215 is manually adjusted to rotate the screw rod, the lower slide 3214 moves, and the pointer 3225 of the scale assembly 3220 moves with the lower slide 3214, and the pointer 3225 points to the scale of the scale body 3221, so that the position of the lower slide 3214 can be accurately adjusted.

[0084] Reference Fig.12 The strip flattening assembly 3400 includes a mounting base 3410, a first roller assembly 3430 and a second roller assembly 3440. The first roller assembly 3430 and the second roller assembly 3440 are arranged on the mounting base 3410 and are respectively located on both sides of the ultrasonic welding unit 3300. The mounting base 3410 is provided with an adjustment block 3420 that can adjust the position along the Z axis. The adjustment block 3420 is provided with a bolt 3421 and is adjusted by the bolt 3421. The first roller assembly 3430 and the second roller assembly 3440 are fixedly installed on the adjustment block 3420. The mounting base 3410 can unify the installation reference surfaces of the first roller assembly 3430 and the second roller assembly 3440 so that the two are aligned at the same height, which is convenient for the disassembly and assembly of the first roller assembly 3430 and the second roller assembly 3440. The height of the first roller assembly 3430 and the second roller assembly 3440 is adjusted by the adjustment block 3420, which is conducive to the first roller assembly 3430 and the second roller assembly 3440 to adapt to the height of the foil material, so that the height of the foil material is maintained at a height suitable for rolling. The first roller assembly 3430 and the second roller assembly 3440 are each provided with two rollers, and the material strip passes through the two rollers and is located between the two rollers, so that the material strip is flattened.

[0085] It should be noted that the first roller assembly 3430 and the second roller assembly 3440 are symmetrically arranged, wherein the two rollers of the first roller assembly 3430 are respectively configured as the first roller 3431 and the second roller 3432, and the second roller 3432 is close to the welding position of the ultrasonic roll welding assembly 3100. The two rollers of the second roller assembly 3440 are respectively configured as the third roller 3441 and the fourth roller 3442, and the third roller 3441 is close to the welding position of the ultrasonic roll welding assembly 3100. It can be understood that Fig.14 and15 As shown, the pole piece strip 2 enters and exits from the lower roller surface of the first roller 3431, passes through the upper roller surface of the second roller 3432, is flattened by the upper roller surface of the third roller 3441, and then passes through the lower roller surface of the fourth roller 3442. The auxiliary pressing assembly 3500 cooperates with the strip flattening assembly 3400 to press the pole piece strip.

[0086] It can be understood that the second roller 3432 and the third roller 3441 located on the inner side are used to confirm the height of the material roll after flattening, that is, the height of the second roller 3432 and the third roller 3441 directly determines the height of the material strip after flattening, and the first roller 3431 and the fourth roller 3442 located on the outer side adjust the flattening effect of the material strip.

[0087] It should be noted that the position of the strip flattening assembly 3400 is not limited to being set on the fixed bracket 3110. In other embodiments, such as Fig.16 and Fig.17 As shown, the strip flattening assembly 3400 is arranged on the side opposite to the fixed bracket 3110 through the second movable base 3450. The strip flattening assembly 3400 of this installation form is used to flatten the strip that needs to be welded with the outer tabs and pole pieces, which is convenient for adjusting the position of the strip, so that the ultrasonic welding unit 3300 can adapt to strips of different widths. The second movable base 3450 is similar in structure to the first movable base 3200, and also drives the strip flattening assembly 3400 to move by driving the screw rod to rotate through the hand wheel, which will not be described in detail here.

[0088] Reference Figure 13-15 The auxiliary pressing assembly 3500 is arranged at the discharge side of the first roller assembly 3430, and is used to press the pre-bonding position of the pole piece strip 2 passing through the first roller assembly 3430. The auxiliary pressing assembly 3500 includes an adjustable bracket 3510 and a pressing body 3520, and the pressing body 3520 is connected to the ultrasonic roll welding assembly 3100 through the adjustable bracket 3510.

[0089] It can be understood that the auxiliary pressing assembly 3500 can press the pole piece strip 2 arranged on the strip flattening assembly 3400 to prevent the strip from shifting during the welding process and improve the welding accuracy.

[0090] The welding module 3000 of the above embodiment is arranged on the inner side, that is, the inner side of the electrode strip 2 is welded.

[0091] like Fig.16 As shown, a welding module 3000 is arranged on the outside and is used to weld the outside of the pole piece strip 2.

[0092] The structure of the outer welding module 3000 and the inner welding module 3000 may be the same, or may be designed differently, for example, Fig.16As shown, an upper slide plate 3600 is added to the welding module 3000 . The upper slide plate 3600 is disposed on the lower slide plate 3214 and is movable along the Y-axis. The ultrasonic welding unit 3300 is disposed on the upper slide plate 3600 .

[0093] It is understandable that the addition of the upper slide plate 3600 facilitates the maintenance of the welding module 3000. For example, the position of the welding module 3000 can be adjusted by manually moving the upper slide plate 3600 without driving the lower slide plate 3214 to move.

[0094] 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 lithium battery pole piece and ear welding device, characterized in that: include: A feeding module, which is provided with a pole piece unwinding module and a foil unwinding module in sequence along the conveying direction of the pole piece strip, wherein the pole piece unwinding module is used to convey the pole piece strip, and the foil unwinding module is used to convey the pole tab foil to the pole tab of the pole piece strip; A deviation correction module is provided between the pole piece unwinding module and the foil material unwinding module, and the deviation correction module is used to adjust the angle and position of the pole piece strip; A welding module is provided at the rear end of the foil unwinding module along the conveying direction of the pole piece strip, and is used to weld the pole piece strip and the pole tab foil to each other; A cleaning module, disposed at the rear end of the welding module along the conveying direction of the electrode strip, the cleaning module being used to clean the surface impurities of the electrode strip after welding; The material receiving module is arranged at the rear end of the cleaning module along the conveying direction of the pole piece material strip, and the material receiving module is used for flattening and winding the pole piece material strip.

2. A lithium battery pole piece and tab welding device according to claim 1, characterized in that: The cleaning module is provided with a brush dust removal module and an iron removal module in sequence along the conveying direction of the pole piece strip. The brush dust removal module is used to clean the surface dust of the pole piece strip, and the iron removal module is used to clean the welding slag of the pole piece strip.

3. The lithium battery pole piece and tab welding equipment according to claim 1, characterized in that: The receiving module is provided with a smoothing module and a winding module in sequence along the conveying direction of the pole piece strip, the smoothing module is used for flattening the pole piece strip, and the winding module is used for winding the pole piece strip.

4. The lithium battery pole piece and tab welding equipment according to claim 1, characterized in that: The pole piece unwinding module includes a first unwinding assembly, a second unwinding assembly and an arc-shaped roller assembly. The first unwinding assembly is used to convey the pole piece material strip, the second unwinding assembly is used to temporarily store and replenish the pole piece material strip, and the arc-shaped roller assembly is used to change the shape of the pole piece material strip into an arc shape.

5. A lithium battery pole piece and tab welding device according to claim 4, characterized in that: The arc-shaped roller assembly is provided with two shaping rollers, a conveying channel and two mounting blocks. The two shaping rollers are arranged on both sides of the conveying channel. The mounting blocks are used to install and fix the shaping rollers. The first unwinding assembly and the second unwinding assembly can both convey the pole piece strip to the conveying channel. The pole piece strip can be shaped by the shaping rollers, and the pole piece strip after shaping can be sent out from the conveying channel.

6. The lithium battery pole piece and tab welding equipment according to claim 1, characterized in that: The correction module is provided with an unwinding correction module, a tension detection roller module and a tension swing arm module in sequence along the conveying direction of the pole piece material strip. The unwinding correction module is located at the rear end of the pole piece unwinding module along the conveying direction of the pole piece material strip. The unwinding correction module can adjust the position of the pole piece material strip. The tension detection roller module is used to detect the conveying tension of the pole piece material strip. The tension swing arm module is used to swing the angle of the pole piece material strip.

7. A lithium battery pole piece and tab welding device according to claim 6, characterized in that: The unwinding and correcting module includes a first driver, a first limiter and a second limiter, the first limiter and the second limiter are both provided with a slot, the first limiter can be movably arranged on the first driver and can be driven by the first driver, the second limiter is fixedly arranged at a position opposite to the first limiter and is located in the moving direction of the first limiter, the pole piece strip is located between the first limiter and the second limiter and is clamped in the slot.

8. The lithium battery pole piece and tab welding equipment according to claim 6, characterized in that: A tape splicing platform module is also provided between the unwinding correction module and the tension detection roller module. The tape splicing platform module includes a tape splicing platform and two positioning members. The two positioning members are arranged on the tape splicing platform and arranged along the conveying direction of the pole piece strip. The positioning members are used to fix the pole piece strip.

9. The lithium battery pole piece and tab welding equipment according to claim 1, characterized in that: The foil unwinding module includes an inner foil unwinding assembly and an outer foil unwinding assembly. The inner foil unwinding assembly is used to convey the foil to the inner side of the pole lug of the pole sheet material strip, and the outer foil unwinding assembly is used to convey the foil to the outer side of the pole lug of the pole sheet material strip. The inner foil unwinding assembly and the outer foil unwinding assembly are both provided with a deviation correction drive unit, which is used to adjust the position of the pole lug foil in the width direction of the pole sheet material strip.

10. The lithium battery pole piece and tab welding equipment according to claim 9, characterized in that: The deviation correction drive unit is provided with a movable drive end and a second drive, the drive end being connected to the first mounting plate of the lithium battery pole piece and tab welding equipment, and the second drive being capable of driving the drive end to move toward or away from the first mounting plate, so as to make the inner foil unwinding assembly or the outer foil unwinding assembly approach or away from the first mounting plate, thereby adjusting the position of the tab foil along its width direction.

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