Ultrasonic roll welding module

Abstract

The utility model discloses an ultrasonic roll welding module which comprises an ultrasonic roll welding assembly, a material belt flattening assembly and an auxiliary pressing assembly, the material belt flattening assembly comprises a first roller passing assembly and a second roller passing assembly which are arranged on the two sides of the ultrasonic roll welding assembly, and a pre-attached tab and pole piece material belt penetrates into the first roller passing assembly and is pressed into the second roller passing assembly. The second roller passing assembly penetrates out of the second roller passing assembly to be flattened; the auxiliary pressing assembly is arranged on the discharging side of the first roller passing assembly and used for pressing the pre-attaching position, penetrating through the tab and pole piece material belt from the first roller passing assembly, of the tab and pole piece material belt. According to the ultrasonic roll welding module, the pre-attached tab and pole piece material belt is flattened through the material belt flattening assembly, and then the pre-attached and flattened tab and pole piece material belt is pressed through the auxiliary pressing assembly, so that the tab foil and the pole piece material belt are kept in an aligned and attached state before welding, and the welding effect of the tab and pole piece material belt is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to an ultrasonic rolling welding 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] Before welding, it is necessary to ensure that the tab foil and the pole sheet strip are aligned and fitted to ensure the welding effect between the tab foil and the pole sheet substrate. However, the tab foil and the pole sheet strip are driven by different drive rollers, which makes it difficult to align the two. Therefore, it is necessary to provide a solution to solve the problem of keeping the tab foil and the pole sheet aligned and fitted before welding. 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 an ultrasonic rolling welding module, which can effectively improve the welding accuracy of the pole piece and the pole ear.

[0005] According to the ultrasonic roll welding module of the first embodiment of the utility model,

[0006] Ultrasonic roll welding components;

[0007] The strip flattening assembly comprises a first roller assembly and a second roller assembly arranged on both sides of the ultrasonic roll welding assembly, and the pre-bonded tab and sheet strip passes through the first roller assembly and passes through the second roller assembly to be flattened;

[0008] The auxiliary pressing assembly is arranged on the discharge side of the first roller assembly, and is used to press the pre-lamination position of the pole tab and pole sheet strip passing through the first roller assembly.

[0009] An ultrasonic roll welding module according to an embodiment of the utility model has at least the following beneficial effects: the ultrasonic roll welding module includes a material strip flattening component, an auxiliary pressing component and an ultrasonic roll welding component. The pre-laminated tab and pole sheet material strip is flattened by the material strip flattening component, and then the pre-laminated and flattened tab and pole sheet material strip is pressed by the auxiliary pressing component, so that the tab foil and the pole sheet material strip are kept aligned and laminated before welding. The ultrasonic roll welding component welds the tab foil and the pole sheet material strip, effectively improving the welding effect of the tab and pole sheet material strip.

[0010] According to some embodiments of the utility model, the ultrasonic roll welding assembly includes a fixed bracket, a first movable base and an ultrasonic roll welding unit, the fixed bracket is arranged on the first movable base, and the ultrasonic roll welding unit is arranged on the fixed bracket.

[0011] According to some embodiments of the utility model, the first movable base includes a fixed bottom plate, a lower slide plate and a driver, the ultrasonic roll welding unit is arranged above the lower slide plate, the lower slide plate is movably arranged on the fixed bottom plate along the Y-axis direction, the driver is arranged on the fixed bottom plate and connected to the lower slide plate; the driver is configured to drive the lower slide plate to move so as to drive the ultrasonic roll welding unit to move in the Y-axis direction.

[0012] According to some embodiments of the present invention, the transmission form of the driver is screw transmission.

[0013] According to some embodiments of the present utility model, the first movable base further includes: a ruler assembly, and the ruler assembly is used to calibrate the displacement of the lower slide plate relative to the fixed base plate.

[0014] According to some embodiments of the utility model, an upper slide plate movably arranged along the Y-axis direction is provided on the lower sliding plate, and the ultrasonic roll welding unit is arranged on the upper slide plate.

[0015] According to some embodiments of the present invention, the material strip flattening assembly includes a mounting base, and the first roller assembly and the second roller assembly are arranged on the mounting base in a form in which the height can be adjusted in the Z-axis direction.

[0016] According to some embodiments of the utility model, the first roller assembly and the second roller assembly are symmetrically arranged, the first roller assembly includes a first roller and a second roller, the second roller is close to the welding position of the ultrasonic roll welding assembly; the second roller assembly includes a third roller and a fourth roller, the third roller is close to the welding position of the ultrasonic roll welding assembly; the pole tab and pole sheet material strip is inserted from the lower roller surface of the first roller, passes through the upper roller surface of the second roller and the upper roller surface of the third roller in turn to be flattened, and then passes through the lower roller surface of the fourth roller.

[0017] According to some embodiments of the utility model, the material strip flattening assembly includes a second movable base, the second movable base is located on the opposite side of the ultrasonic roll welding assembly, the first roller assembly and the second roller assembly are both arranged on the first movable base, and the free ends of the first roller assembly and the second roller assembly extend toward the welding position of the ultrasonic roll welding assembly.

[0018] According to some embodiments of the present utility model, the auxiliary pressing assembly includes an adjustable bracket and a pressing piece, and the pressing piece is arranged on the ultrasonic roll welding assembly through the adjustable bracket.

[0019] 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

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic structural diagram of an ultrasonic roll welding module according to an embodiment of the present utility model;

[0022] Figure 2 It is a structural schematic diagram of a first mobile base assembly of an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a material strip flattening assembly according to an embodiment of the utility model;

[0024] Figure 4 This is a schematic structural diagram of an auxiliary pressing assembly according to an embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of a strip flattening assembly of an embodiment of the utility model flattening a pole piece strip;

[0026] Figure 6 It is a schematic diagram of an auxiliary pressing assembly in accordance with an embodiment of the utility model, in which a material strip flattening assembly is used to press a pole piece material strip tightly;

[0027] Figure 7 It is a structural schematic diagram of an ultrasonic roll welding module of another embodiment of the utility model;

[0028] Figure 8 yes Figure 7 A schematic diagram of the strip flattening assembly of the ultrasonic roll welding module is shown.

[0029] Reference numerals:

[0030] Ultrasonic roll welding assembly 100, fixing bracket 110;

[0031] The first movable base 200, the fixed base plate 210, the limit block 211, the guide rail 212, the slider 213, the lower slide plate 214, the top block 2140, the driver 215, the ruler assembly 220, the ruler body 221, the guide shaft 222, the guide block 223, the extension part 2230, the locking handle 224, and the pointer 225;

[0032] Ultrasonic roll welding unit 300, welding mechanism 310;

[0033] The material strip flattening assembly 400, the mounting base 410, the adjusting block 420, the bolt 421, the first roller assembly 430, the first roller 431, the second roller 432, the second roller assembly 440, the third roller 441, the fourth roller 442, and the second movable base 450;

[0034] Auxiliary pressing assembly 500, adjustable bracket 510, pressing body 520;

[0035] 600 on the skateboard. 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] Before welding, it is necessary to ensure that the tab foil and the pole sheet strip are aligned and fitted to ensure the welding effect between the tab foil and the pole sheet substrate. However, the tab foil and the pole sheet strip are driven by different drive rollers, which makes it difficult to align the two. Therefore, it is necessary to provide a solution to solve the problem of keeping the tab foil and the pole sheet aligned and fitted before welding.

[0042] refer to Figures 1 to 8 An ultrasonic roll welding module provided according to an embodiment of the utility model is described, which includes a strip flattening component, an auxiliary pressing component and an ultrasonic roll welding component. The pre-bonded tab and tab strip strip is flattened by the strip flattening component, and then the pre-bonded and flattened tab and tab strip strip is pressed by the auxiliary pressing component, so that the tab foil and the tab strip strip are aligned and bonded before welding. The ultrasonic roll welding component welds the tab foil and the tab strip strip, effectively improving the welding effect of the tab and tab strip strip. Specific examples are listed below for illustration.

[0043] Reference Figure 1 and Figure 2 As shown, the ultrasonic roll welding module includes an ultrasonic roll welding assembly 100, and the ultrasonic roll welding assembly 100 includes a fixed bracket 110, a first movable base 200, and an ultrasonic roll welding unit 300, wherein the fixed bracket 110 is disposed on the first movable base 200, and the ultrasonic roll welding unit 300 is disposed on the fixed bracket 110. It can be understood that the fixed bracket 110 can move toward the material strip on the first movable base 200, so that the position of the ultrasonic roll welding unit 300 for welding can be aligned with the position to be welded of the material strip, thereby improving the welding accuracy.

[0044] It should be noted that the first movable base 200 includes a fixed base plate 210, a lower plate 214 and a driver 215, and the ultrasonic roll welding unit 300 is installed above the lower plate 214 and fixed by fasteners such as screws. Figure 1As shown, the ultrasonic roll welding unit 300 is provided with a welding mechanism 310 that can be raised and lowered, and the welding mechanism 310 can be raised or lowered according to the position of the material strip. The fixed bottom plate 210 is provided with a guide rail 212 and a slider 213, the slider 213 is movably arranged on the guide rail 212, and the lower slide plate 214 is arranged above the slider 213 and connected to the slider 213. The driving mode of the driver 215 is a screw drive, and the driver 215 also includes a hand wheel. Turning the hand wheel can move the screw seat on the screw assembly, and the lower slide plate 214 is connected to the screw seat. The driver 215 can drive the lower slide plate 214 to move to drive the ultrasonic roll welding unit 300 to move in the Y-axis direction.

[0045] In addition, the driving mode of the driver 215 is not limited to the driving mode described above. In other embodiments, the driver 215 can also be an automatic driving mode driven by a servo motor. Under the structure of this driving mode, the servo motor is arranged at the original handwheel position and is connected to the screw drive of the screw assembly.

[0046] Reference Figure 2 As shown, the first mobile base 200 further includes a ruler assembly 220, which is used to calibrate the displacement of the lower slide plate 214 relative to the fixed base plate 210. It should be noted that the ruler assembly 220 includes a ruler body 221, a guide shaft 222, a guide block 223, a locking handle 224 and a pointer 225. The ruler body 221 is arranged on the lower slide plate 214, and the ruler body 221 is configured as a ruler with scale. The guide shaft 222 is arranged on the fixed base, and the guide shaft 222 is parallel to the ruler body 221. The guide block 223 is arranged on the lower slide plate 214, and the guide block 223 has an extension portion 2230 extending toward the guide shaft 222. The extension portion 2230 is slidably matched with the guide shaft 222. Specifically, the extension portion 2230 is provided with a through hole, and the guide shaft 222 passes through the through hole. The locking handle 224 is arranged on the guide block 223, and the locking handle 224 can be rotated under the action of an external force to lock and fix the guide block 223 relative to the guide shaft 222. The locking handle 224 is rotated so that the locking handle 224 presses the guide shaft 222 to achieve fixation. The guiding structure of the guide block 223 is not limited to the above-mentioned extension part 2230. In other embodiments, the guide block 223 can also replace the through hole of the extension part 2230 with a slot, and the guide shaft 222 can be movably disposed in the slot. The pointer 225 is disposed on the guide block 223 and points to the ruler body 221.

[0047] It should be noted that the fixed bottom plate 210 is further provided with a limit block 211, and the lower slide plate 214 is further provided with a top block 2140 for cooperating with the limit block 211. When the lower slide plate 214 moves to a position where the top block 2140 abuts against the limit block 211, the lower slide plate 214 stops sliding. The limit block 211 is further provided with a buffer block to buffer the lower slide plate 214.

[0048] It is understandable that the function of the scale assembly 220 is to detect the moving distance of the lower slide plate 214 when the first movable base 200 is manually adjusted, that is, to detect the moving distance of the ultrasonic roll welding unit 300 installed on the lower slide plate 214. For example, the hand wheel of the driver 215 is manually adjusted to rotate the screw rod, the lower slide plate 214 moves, and the pointer 225 of the scale assembly 220 moves with the lower slide plate 214, and the pointer 225 points to the scale of the scale body 221, so that the position of the lower slide plate 214 can be accurately adjusted.

[0049] Reference Figure 3 The strip flattening assembly 400 includes a mounting base 410, a first roller assembly 430 and a second roller assembly 440. The first roller assembly 430 and the second roller assembly 440 are arranged on the mounting base 410 and are respectively located on both sides of the ultrasonic roll welding unit 300. The mounting base 410 is provided with an adjustment block 420 that can adjust the position along the Z axis. The adjustment block 420 is provided with a bolt 421 and is adjusted by the bolt 421. The first roller assembly 430 and the second roller assembly 440 are fixedly installed on the adjustment block 420. The mounting base 410 can unify the installation reference surface of the first roller assembly 430 and the second roller assembly 440 so that the two are aligned at the same height, which is convenient for the disassembly and assembly of the first roller assembly 430 and the second roller assembly 440. The height of the first roller assembly 430 and the second roller assembly 440 is adjusted by the adjustment block 420, which is conducive to the first roller assembly 430 and the second roller assembly 440 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 430 and the second roller assembly 440 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.

[0050] It should be noted that the first roller assembly 430 and the second roller assembly 440 are symmetrically arranged, wherein the two rollers of the first roller assembly 430 are respectively configured as the first roller 431 and the second roller 432, and the second roller 432 is close to the welding position of the ultrasonic roll welding assembly 100. The two rollers of the second roller assembly 430 are respectively configured as the third roller 441 and the fourth roller 442, and the third roller 441 is close to the welding position of the ultrasonic roll welding assembly 100. It can be understood that Figure 5 and Figure 6 As shown, the tab and sheet material strip enters and exits from the lower roller surface of the first roller 431 , passes through the upper roller surface of the second roller 432 , is flattened by the upper roller surface of the third roller 441 , and then passes through the lower roller surface of the fourth roller 442 .

[0051] It can be understood that the second roller 432 and the third roller 441 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 432 and the third roller 441 directly determines the height of the material strip after flattening; the first roller 431 and the fourth roller 442 located on the outer side are used to confirm the effect of flattening the material strip. It can be understood that if the first roller 431 and the fourth roller 442 are not adjusted, the material strip cannot be tensioned, affecting the welding accuracy.

[0052] It should be noted that the position of the strip flattening assembly 400 is not limited to being set on the fixed bracket 110. In other embodiments, such as Figure 7 and Figure 8 As shown, the strip flattening assembly 400 is arranged on the side opposite to the fixed bracket 110 through the second movable base 450. The strip flattening assembly 400 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 roll welding unit 300 can adapt to strips of different widths. The second movable base 450 is similar in structure to the first movable base 200, and also drives the strip flattening assembly to move by driving the screw rod to rotate through the hand wheel, which will not be described in detail here.

[0053] Reference Figure 4 The auxiliary pressing assembly 500 is disposed at the discharge side of the first roller assembly 430, and is used to press the pre-bonding position of the tab and sheet material strip passing through the first roller assembly 430. The auxiliary pressing assembly 500 includes an adjustable bracket 510 and a pressing body 520, and the pressing body 520 is connected to the ultrasonic roll welding assembly 100 through the adjustable bracket 510.

[0054] It is understandable that if Figure 6 As shown, the auxiliary pressing assembly 500 can press the material strip arranged on the material strip flattening assembly 400 to prevent the material strip from shifting during the welding process, thereby improving the welding accuracy.

[0055] The ultrasonic roll welding module of the above embodiment is arranged on the inner side, that is, the inner side of the tab and sheet material strip is welded. It can be understood that in other embodiments, such as Figure 7 The figure shows an ultrasonic roll welding module arranged on the outside, which is used to weld the outside of the pole tab and pole sheet strip. The difference between the two is that the ultrasonic roll welding module on the outside also includes an upper slide plate 600, which is arranged on the lower slide plate 214 and can move along the Y-axis, and the ultrasonic roll welding unit 300 is arranged on the upper slide plate 600; the strip flattening assembly 400 is arranged on the side opposite to the ultrasonic roll welding unit 300.

[0056] It is understandable that the addition of the upper slide plate 600 facilitates the maintenance of the ultrasonic roll welding module. For example, the position of the ultrasonic roll welding module can be adjusted by manually driving the upper slide plate 600 to move, without driving the lower slide plate 214 to move.

[0057] 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. An ultrasonic roll welding module, characterized in that: include: Ultrasonic roll welding components; The strip flattening assembly comprises a first roller assembly and a second roller assembly arranged on both sides of the ultrasonic roll welding assembly, and the pre-bonded tab and sheet strip passes through the first roller assembly and passes through the second roller assembly to be flattened; The auxiliary pressing assembly is arranged on the discharge side of the first roller assembly, and is used to press the pre-lamination position of the pole tab and pole sheet strip passing through the first roller assembly.

2. The ultrasonic roll welding module according to claim 1, characterized in that: The ultrasonic roll welding assembly comprises a fixed bracket, a first movable base and an ultrasonic roll welding unit. The fixed bracket is arranged on the first movable base, and the ultrasonic roll welding unit is arranged on the fixed bracket.

3. The ultrasonic roll welding module according to claim 2, characterized in that: The first movable base includes a fixed bottom plate, a lower slide plate and a driver, the ultrasonic roll welding unit is arranged above the lower slide plate, the lower slide plate is movably arranged on the fixed bottom plate along the Y-axis direction, the driver is arranged on the fixed bottom plate and connected to the lower slide plate; the driver is configured to drive the lower slide plate to move so as to drive the ultrasonic roll welding unit to move in the Y-axis direction.

4. The ultrasonic roll welding module according to claim 3, characterized in that: The transmission form of the driver is screw transmission.

5. The ultrasonic roll welding module according to claim 3, characterized in that: The first movable base also includes: a ruler assembly, and the ruler assembly is used to calibrate the displacement of the lower slide plate relative to the fixed base plate.

6. The ultrasonic roll welding module according to claim 3, characterized in that: An upper slide plate movably arranged along the Y-axis direction is provided on the lower slide plate, and the ultrasonic roll welding unit is arranged on the upper slide plate.

7. The ultrasonic roll welding module according to claim 2, characterized in that: The material strip flattening assembly comprises a mounting base, and the first roller assembly and the second roller assembly are arranged on the mounting base in a form in which the height can be adjusted in the Z-axis direction.

8. The ultrasonic roll welding module according to claim 7, characterized in that: The first roller assembly and the second roller assembly are symmetrically arranged, the first roller assembly includes a first roller and a second roller, the second roller is close to the welding position of the ultrasonic roll welding assembly; the second roller assembly includes a third roller and a fourth roller, the third roller is close to the welding position of the ultrasonic roll welding assembly; the pole tab and pole sheet material strip passes through the lower roller surface of the first roller, passes through the upper roller surface of the second roller and the upper roller surface of the third roller in turn to be flattened, and then passes through the lower roller surface of the fourth roller.

9. The ultrasonic roll welding module according to claim 7 or 8, characterized in that: The material strip flattening assembly includes a second movable base, which is located on the opposite side of the ultrasonic roll welding assembly. The first roller assembly and the second roller assembly are both arranged on the first movable base, and the free ends of the first roller assembly and the second roller assembly extend toward the welding position of the ultrasonic roll welding assembly.

10. The ultrasonic roll welding module according to claim 1, characterized in that: The auxiliary pressing assembly comprises an adjustable bracket and a pressing piece, and the pressing piece is arranged on the ultrasonic rolling welding assembly through the adjustable bracket.

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