Material belt unwinding device and battery production line

Abstract

The application provides a material belt unwinding device and a battery production line. The material belt unwinding device comprises a rack, first and second unwinding shafts fixedly arranged on the rack at intervals, and a belt receiving mechanism comprising a swing arm and a belt pressing and cutting assembly. The first end of the swing arm is rotatably arranged on the rack, and the second end of the swing arm is adapted to swing between the first and second unwinding shafts. The belt pressing and cutting assembly is arranged on the second end of the swing arm. The belt receiving mechanism has a first belt receiving position for swinging close to the first unwinding shaft, a second belt receiving position for swinging close to the second unwinding shaft, and an avoiding position. In the above structure, the first and second unwinding shafts on the rack are fixed and do not move. The material belt can be changed and continuously unwound through the swing of the swing arm. Therefore, the material belt unwinding device occupies a small space. In addition, the first and second unwinding shafts do not need to rotate as a whole, the rigidity requirement of the driving mechanism is reduced, and the driving mechanism is not easy to be damaged.

Description

Technical Field

[0001] This invention relates to the field of battery production equipment technology, specifically to a strip unwinding device and a battery production line. Background Technology

[0002] In lithium battery production, materials such as separators and electrodes are unwound using an unwinding device and then transferred to downstream processing. The unwinding device typically has multiple unwinding shafts, on which the material rolls are placed. When the material roll on a particular unwinding shaft is finished unwinding, the device needs to stop unwinding and manually reel in the material. After reeling, the device restarts to resume unwinding. This reeling process causes the device to stop for more than 30 seconds, severely impacting production efficiency.

[0003] To address this issue, some existing unwinding devices incorporate an automatic tape-joining mechanism, where multiple unwinding shafts are driven to rotate via a turntable. When the tape on a particular unwinding shaft finishes, the turntable drives the next unwinding shaft, now carrying a new roll, to rotate to the automatic tape-joining mechanism. This mechanism then connects the tapes, thereby improving production efficiency.

[0004] However, in the above structure, on the one hand, the turntable rotates circumferentially, occupying a large space; on the other hand, the unwinding shaft with the new material roll is very heavy, resulting in a large moment of inertia when the turntable rotates, which can easily damage the drive mechanism and pose a risk of equipment collapse. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of existing material strip unwinding equipment, such as large space occupation and easy damage of drive mechanism, so as to provide a material strip unwinding equipment and battery production line.

[0006] To address the aforementioned problems, the present invention provides a tape unwinding device, comprising: a frame; a first unwinding shaft and a second unwinding shaft fixedly spaced on the frame; and a tape receiving mechanism, including a swing arm and a tape pressing and cutting assembly. A first end of the swing arm is rotatably mounted on the frame, and a second end of the swing arm is adapted to swing between the first and second unwinding shafts. The tape pressing and cutting assembly is mounted on the second end of the swing arm. The tape receiving mechanism has a first receiving position (swinging to a position close to the first unwinding shaft), a second receiving position (swinging to a position close to the second unwinding shaft), and a clearance position. When the tape receiving mechanism is in the first receiving position, the tape pressing and cutting assembly presses the tape on the second unwinding shaft onto the tape on the first unwinding shaft and cuts the tape. When the tape receiving mechanism is in the second receiving position, the tape pressing and cutting assembly presses the tape on the first unwinding shaft onto the tape on the second unwinding shaft and cuts the tape. When the tape receiving mechanism is in the clearance position, the tape pressing and cutting assembly clears the tape. The tape is unwound. The equipment also includes a first guide roller mechanism and a second guide roller mechanism, which are spaced apart along the direction from the first unwinding shaft to the second unwinding shaft. The first guide roller mechanism is adapted to tension and correct the material strip on the first unwinding shaft, and the second guide roller mechanism is adapted to tension and correct the material strip on the second unwinding shaft. Both the first guide roller mechanism and the second guide roller mechanism include a correction roller and a tensioning roller. The correction roller is fixedly mounted on the frame and is located downstream of the pressure belt cutting assembly along the material strip's travel direction. The tensioning roller is movably mounted on the frame and has a tensioned position and a retracted position. Along the material strip's travel direction, the tensioned position is located upstream of the pressure belt cutting assembly, and the retracted position is located downstream of the pressure belt cutting assembly. When the first unwinding shaft and the second unwinding shaft unwind the material strip, the tensioning roller moves to the tensioned position. When the pressure belt cutting assembly is located at the first or second connection position, the tensioning roller moves to the retracted position.

[0007] Optionally, the tape cutting assembly includes a pressure roller and a cutting mechanism. Along the travel direction of the tape, the pressure roller is located downstream of the cutting mechanism, which is movably mounted on the swing arm. When the tape receiving mechanism is in the first tape receiving position, the cutting mechanism extends toward the first unwinding shaft, and when the tape receiving mechanism is in the second tape receiving position, the cutting mechanism extends toward the second unwinding shaft.

[0008] Optionally, the cutting mechanism includes a first cutter, a second cutter, and a first drive mechanism. The first cutter and the second cutter are rotatably mounted on the swing arm and are arranged opposite to each other. The first cutter is provided with a first gear, and the second cutter is provided with a second gear. The first gear and the second gear mesh, and the first drive mechanism drives the first cutter or the second cutter to rotate.

[0009] Optionally, the cutting mechanism includes a first cutter, a second cutter, a first driving mechanism, and a second driving mechanism. The driving end of the first driving mechanism is connected to the first cutter, and the driving end of the second driving mechanism is connected to the second cutter. When the tape receiving mechanism is in the first tape receiving position, the first driving mechanism drives the first cutter to extend toward the first unwinding shaft. When the tape receiving mechanism is in the second tape receiving position, the second driving mechanism drives the second cutter to extend toward the second unwinding shaft.

[0010] Optionally, the cutting mechanism includes a swing arm, a cutter, and a first drive mechanism. The first end of the swing arm is rotatably connected to the swing arm, and the cutter is disposed on the second end of the swing arm. The cutter includes a first cutting edge and a second cutting edge located on both sides. When the tape receiving mechanism is in the first tape receiving position, the first drive mechanism drives the cutter to swing toward the first unwinding shaft. When the tape receiving mechanism is in the second tape receiving position, the first drive mechanism drives the cutter to swing toward the second unwinding shaft.

[0011] Optionally, the tape receiving mechanism further includes a third drive mechanism and a fourth drive mechanism. The third drive mechanism is fixedly mounted on the frame, and its drive end is adapted to move axially along the first unwinding shaft and the second unwinding shaft. The fourth drive mechanism is connected to the drive end of the third drive mechanism, and its drive end is adapted to rotate. The second end of the swing arm is connected to the drive end of the fourth drive mechanism. When the tape receiving mechanism is in the first tape receiving position or the second tape receiving position, the drive end of the third drive mechanism retracts. When the tape receiving mechanism is in the avoidance position, the drive end of the third drive mechanism extends to misalign the tape cutting assembly with the tape.

[0012] Optionally, the tape receiving mechanism further includes a first mounting base and a slide. The first mounting base is fixedly mounted on the frame, and the slide is slidably mounted on the first mounting base. A third drive mechanism is mounted on the first mounting base, and a fourth drive mechanism is mounted on the slide.

[0013] Optionally, the pressure strip cutting assembly also includes an adjusting roller. Along the travel direction of the material strip, the adjusting roller is located upstream of the cutting mechanism. When the tape receiving mechanism is in the first tape receiving position or the second tape receiving position, the adjusting roller and the pressure roller are in contact with the material strip so that the cutting mechanism and the material strip maintain a preset angle.

[0014] Optionally, both the first and second roller guiding mechanisms further include a second mounting base and a fifth drive mechanism. The second mounting base is fixedly mounted on the frame, the guiding roller is fixedly mounted on the second mounting base, and the fifth drive mechanism is mounted on the second mounting base. The drive end of the fifth drive mechanism is adapted to move in a straight line, and the tensioning roller is connected to the drive end of the fifth drive mechanism.

[0015] This application also provides a battery production line, including the aforementioned strip unwinding equipment.

[0016] The present invention has the following advantages:

[0017] Using the technical solution of this invention, the swing arm of the tape receiving mechanism swings between the first unwinding shaft and the second unwinding shaft. When the tape unwinding device unwinds the tape, the swing arm is in a clearance position. After the tape on the second unwinding shaft is unwound, the swing arm swings to the first receiving position, and the tape pressing and cutting component presses the tape on the second unwinding shaft onto the first unwinding shaft and cuts the tape, thereby realizing the change of the tape on the first unwinding shaft. After the tape on the first unwinding shaft is unwound, the swing arm swings to the second receiving position, and the tape pressing and cutting component presses the tape on the first unwinding shaft onto the second unwinding shaft and cuts the tape, thereby realizing the change of the tape on the second unwinding shaft. In the above structure, the first and second unwinding shafts on the frame are fixed, and the tape change and continuous unwinding can be realized by swinging the swing arm, so the tape unwinding device occupies little space. Furthermore, since the first and second unwinding shafts do not need to rotate as a whole, the rigidity requirement of the drive mechanism is reduced, and the drive mechanism is not easily damaged. Therefore, the technical solution of the present invention solves the defects of the existing material strip unwinding equipment, which occupies a large space and whose drive mechanism is easily damaged. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a first embodiment of the tape unwinding device according to the present invention is shown;

[0020] Figure 2 It shows Figure 1 A schematic diagram of the tape splicing structure of the medium-weight tape unwinding equipment;

[0021] Figure 3 It shows Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 It shows Figure 2 Another structural diagram of the center connector structure;

[0023] Figure 5 It shows Figure 1 A schematic diagram of the first or second over-roll mechanism of the medium-weight strip unwinding equipment;

[0024] Figure 6 It shows Figure 1 A schematic diagram showing the completion of unwinding on the second unwinding shaft of the medium-weight strip unwinding device;

[0025] Figure 7 It shows Figure 6 Enlarged view of point B in the middle;

[0026] Figure 8 It shows Figure 1 A schematic diagram of the swing arm of the medium-weight strip unwinding device swinging to the first strip contact position;

[0027] Figure 9 It shows Figure 8 A schematic diagram of the cutting mechanism of the medium-load strip unwinding equipment cutting the strip;

[0028] Figure 10 It shows Figure 1 A schematic diagram of the first unwinding shaft of the medium-weight strip unwinding equipment unwinding the strip;

[0029] Figure 11 It shows Figure 1 A schematic diagram showing the completion of unwinding on the first unwinding shaft of the medium-weight strip unwinding device;

[0030] Figure 12 It shows Figure 1 A schematic diagram of the swing arm of the medium-weight strip unwinding equipment swinging to the second strip splicing position;

[0031] Figure 13 It shows Figure 12 A schematic diagram of the cutting mechanism of the medium-load strip unwinding equipment cutting the strip;

[0032] Figure 14 It shows Figure 1 A schematic diagram of the second unwinding shaft of the medium-weight strip unwinding equipment for unwinding the strip;

[0033] Figure 15 A schematic diagram of the cutting mechanism structure of a second embodiment of the tape unwinding device according to the present invention is shown; and

[0034] Figure 16 A schematic diagram of the cutting mechanism structure of a third embodiment of the tape unwinding device according to the present invention is shown.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Belt; 10. Frame; 20. First unwinding shaft; 30. Second unwinding shaft; 40. Belt splicing mechanism; 41. Swing arm; 42. Belt pressing and cutting assembly; 421. Pressure roller; 422. Cutting mechanism; 4221. First cutter; 42211. First gear; 4222. Second cutter; 42221. Second gear; 4223. First drive mechanism; 4224. Second drive mechanism; 4225. Swing arm; 4226. Cutter; 42261. First blade; 42262. Second blade; 423. Adjusting roller; 43. Third drive mechanism; 44. Fourth drive mechanism; 45. First mounting base; 46. Slide; 51. First roller guide mechanism; 52. Second roller guide mechanism; 501. Correcting roller; 502. Tensioning roller; 503. Second mounting base; 504. Fifth drive mechanism. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1

[0042] like Figures 1 to 14As shown, an embodiment of the tape unwinding device according to this application includes a frame 10 and a tape receiving mechanism 40. A first unwinding shaft 20 and a second unwinding shaft 30 are fixedly spaced on the frame 10. The tape receiving mechanism 40 includes a swing arm 41 and a tape pressing and cutting assembly 42. The first end of the swing arm 41 is rotatably mounted on the frame 10, and the second end of the swing arm 41 is adapted to swing between the first unwinding shaft 20 and the second unwinding shaft 30. The tape pressing and cutting assembly 42 is mounted on the second end of the swing arm 41.

[0043] Furthermore, the tape-attaching mechanism 40 has a first tape-attaching position that swings to a position close to the first unwinding shaft 20, a second tape-attaching position that swings to a position close to the second unwinding shaft 30, and a clearance position. For example... Figure 8 and Figure 9 As shown, when the tape splicing mechanism 40 is in the first splicing position, the tape pressing and cutting assembly 42 presses the tape 1 on the second unwinding shaft 30 against the tape 1 on the first unwinding shaft 20 and cuts the tape 1. Figure 12 and Figure 13 As shown, when the tape-joining mechanism 40 is in the second tape-joining position, the tape-pressing and cutting assembly 42 presses the tape 1 on the first unwinding shaft 20 onto the tape 1 on the second unwinding shaft 30, and cuts the tape 1. Figure 10 and Figure 14 As shown, when the tape receiving mechanism 40 is in the avoidance position, the tape cutting assembly 42 avoids the tape 1.

[0044] Using the technical solution of this embodiment, the swing arm 41 of the tape receiving mechanism 40 swings between the first unwinding shaft and the second unwinding shaft. When the tape unwinding device unwinds the tape 1, the swing arm 41 is in a clearance position. After the tape 1 on the second unwinding shaft 30 is unwound, the swing arm 41 swings to the first receiving position, and the tape pressing and cutting assembly 42 presses the tape 1 on the second unwinding shaft 30 onto the first unwinding shaft 20 and cuts the tape 1, thereby realizing the rewinding of the first unwinding shaft 20. After the tape 1 on the first unwinding shaft 20 is unwound, the swing arm 41 swings to the second receiving position, and the tape pressing and cutting assembly 42 presses the tape 1 on the first unwinding shaft 20 onto the second unwinding shaft 30 and cuts the tape 1, thereby realizing the rewinding of the second unwinding shaft 30. In the above structure, the first unwinding shaft 20 and the second unwinding shaft 30 on the frame 10 are fixed. The material strip 1 can be changed and continuously unwound by swinging the swing arm 41. Therefore, the material strip unwinding device occupies little space. Furthermore, since the first unwinding shaft 20 and the second unwinding shaft 30 do not need to rotate as a whole, the rigidity requirement of the drive mechanism is reduced, and the drive mechanism is not easily damaged. Therefore, the technical solution of this embodiment solves the defects of the prior art material strip unwinding device, which occupies a large space and whose drive mechanism is easily damaged.

[0045] It should be noted that the strip unwinding equipment in this embodiment is used for battery production, and the strip 1 can be electrode strip, separator strip, etc. However, those skilled in the art will understand that the strip unwinding equipment of this embodiment can also be used for strips in other fields during unwinding.

[0046] like Figure 1 As shown, the frame 10 is used to provide mounting and support for other parts. In this embodiment, the frame 10 includes a support plate, which is vertically arranged. Of course, the frame 10 can also be other structures, such as a frame structure.

[0047] like Figure 1 As shown, both the first unwinding shaft 20 and the second unwinding shaft 30 are mounted on the frame 10 and are used for unwinding the material strip 1. Furthermore, both the first unwinding shaft 20 and the second unwinding shaft 30 are perpendicular to the support plate of the frame 10. The first unwinding shaft 20 and the second unwinding shaft 30 can be driven to rotate around their axes by an external drive mechanism (e.g., a motor), thereby realizing the unwinding of the material strip 1. The relative positions of the first unwinding shaft 20, the second unwinding shaft 30, and the frame 10 are fixed.

[0048] like Figure 1 As shown, the tape-connecting mechanism 40 is installed on the frame 10. The function of the tape-connecting mechanism 40 is to connect the tail end of the tape 1 on the other tape 1 on the first unwinding shaft 20 and the second unwinding shaft 30 when the unwinding of the tape 1 is about to be completed, thereby realizing the tape change.

[0049] Furthermore, the tape-attaching mechanism 40 includes a swing arm 41 and a tape-pressing and cutting assembly 42. Figure 1 The swing arm 41, as shown in the diagram, is a long strip structure positioned between the first unwinding shaft 20 and the second unwinding shaft 30. The lower end of the swing arm 41 is rotatably mounted on the frame 10, while the upper end is the swinging end. The tape pressing and cutting assembly 42 is located at the upper end of the swing arm 41. Its function is to press the tape 1 that is about to be unwound onto the unwound tape 1 (connected by double-sided adhesive on the tape roll), and then cut the tape 1, thus achieving tape change.

[0050] Furthermore, the swing arm 41 has a first receiving position, a second receiving position, and a clearance position. When the unwinding device unwinds the strip 1, the swing arm 41 is in the clearance position to prevent the pressing and cutting assembly 42 from interfering with the strip 1. After the strip 1 on the second unwinding shaft 30 is unwound, the swing arm 41 swings toward the first unwinding shaft 20 to the first receiving position (at this time, the first unwinding shaft 20 is equipped with a strip roll). Then, the pressing and cutting assembly 42 presses the strip 1 on the second unwinding shaft 30 onto the strip on the first unwinding shaft 20 (and attaches it with double-sided tape), and then cuts the strip 1, thereby realizing the change of the strip from the second unwinding shaft 30 to the first unwinding shaft 20. After the material strip 1 on the first unwinding shaft 20 is unwound, the swing arm 41 swings toward the second unwinding shaft 30 to the second tape receiving position (at this time, the second unwinding shaft 30 is equipped with a material strip roll). Then, the tape pressing and cutting assembly 42 presses the material strip 1 on the first unwinding shaft 20 onto the material strip on the second unwinding shaft 30 (and attaches it with double-sided tape), and then cuts the material strip 1, thereby realizing the tape change from the first unwinding shaft 20 to the second unwinding shaft 30.

[0051] Based on the above structure, the following details the various states during the rewinding process of the strip unwinding device in this embodiment:

[0052] State 1: such as Figure 6 As shown, the material strip 1 on the second unwinding shaft 30 is about to be rewound. At this time, the swing arm 41 is in the avoidance position, and the pressure and cutting assembly 42 is located between the material strip 1 and the second unwinding shaft 30.

[0053] State 2: such as Figure 8 As shown, the position of the double-sided adhesive at the head of the material roll on the first unwinding shaft 20 is identified, and the first unwinding shaft 20 is controlled to rotate at the same speed as the material belt 1. The swing arm 41 swings to the first tape receiving position, and the tape pressing and cutting assembly 42 presses the material belt on the second unwinding shaft 30 onto the material roll of the first unwinding shaft 20, and attaches it to the material roll of the first unwinding shaft 20 with double-sided adhesive.

[0054] State 3: such as Figure 9 As shown, the tape cutting assembly 42 cuts the tape on the second unwinding shaft 30;

[0055] State 4: such as Figure 10 As shown, the swing arm 41 swings to the avoidance position, and the material strip 1 on the first unwinding shaft 20 begins to unwind. The material roll can be loaded onto the second unwinding shaft 30 manually or by external equipment.

[0056] State 5: such as Figure 11 As shown, the material strip 1 on the first unwinding shaft 20 is about to be rewound. At this time, the swing arm 41 is in the avoidance position, and the pressure and cutting assembly 42 is located between the material strip 1 and the first unwinding shaft 20.

[0057] State 6: such as Figure 12 As shown, the position of the double-sided adhesive at the head of the material roll on the second unwinding shaft 30 is identified, and the second unwinding shaft 30 is controlled to rotate at the same speed as the material belt 1. The swing arm 41 swings to the second tape receiving position, and the tape pressing and cutting assembly 42 presses the material belt on the first unwinding shaft 20 onto the material roll of the second unwinding shaft 30, and attaches it to the material roll of the second unwinding shaft 30 with double-sided adhesive.

[0058] Status 7: such as Figure 13 As shown, the tape cutting assembly 42 cuts the tape on the first unwinding shaft 20;

[0059] Status 8: such as Figure 14 As shown, the swing arm 41 swings to the avoidance position, and the material strip 1 on the second unwinding shaft 30 begins to unwind. The material roll can be loaded onto the first unwinding shaft 20 manually or by external equipment.

[0060] By repeatedly performing states 1 to 8, the rewinding and splicing of the material strip 1 can be achieved. The splicing process described above can be achieved simply by swinging the swing arm 41, without the need for the overall rotation of the first unwinding shaft 20 and the second unwinding shaft 30. Therefore, the overall space occupied is small, the rigidity requirement of the drive mechanism is low, the equipment is not easily damaged, and there is no risk of tipping over.

[0061] like Figure 2 , Figure 3 , Figure 4 as well as Figure 7 As shown, in this embodiment, the pressure strip cutting assembly 42 includes a pressure roller 421 and a cutting mechanism 422. Along the travel direction of the material strip 1, the pressure roller 421 is located downstream of the cutting mechanism 422, which is movably mounted on the swing arm 41. When the tape receiving mechanism 40 is in the first tape receiving position, the cutting mechanism 422 extends towards the first unwinding shaft 20; when the tape receiving mechanism 40 is in the second tape receiving position, the cutting mechanism 422 extends towards the second unwinding shaft 30.

[0062] Specifically, with Figure 7 The direction shown indicates that the pressure roller 421 is positioned above the cutting mechanism 422, and its function is to press the material strip 1 tightly. In states 2 and 3, the pressure roller 421 contacts the material strip 1, thereby pressing the material strip on the second unwinding shaft 30 onto the material roll on the first unwinding shaft 20. In states 6 and 7, the pressure roller 421 contacts the material strip 1, thereby pressing the material strip on the first unwinding shaft 20 onto the material roll on the second unwinding shaft 30.

[0063] Furthermore, the cutting mechanism 422 can extend towards the first unwinding shaft 20, extend towards the second unwinding shaft 30, and retract. In state 3 above, the cutting mechanism 422 extends towards the first unwinding shaft 20 and cuts the material strip 1 on the second unwinding shaft 30. In state 7 above, the cutting mechanism 422 extends towards the second unwinding shaft 30 and cuts the material strip 1 on the first unwinding shaft 20. In other states, the cutting mechanism 422 is in the retracted state.

[0064] like Figures 2 to 4 ,as well as Figure 7 As shown, the cutting mechanism 422 includes a first cutter 4221, a second cutter 4222, and a first drive mechanism 4223. The first cutter 4221 and the second cutter 4222 are rotatably mounted on the swing arm 41, and are arranged opposite to each other. A first gear 42211 is provided on the first cutter 4221, and a second gear 42221 is provided on the second cutter 4222. The first gear 42211 and the second gear 42221 mesh, and the first drive mechanism 4223 drives either the first cutter 4221 or the second cutter 4222 to rotate.

[0065] Specifically, the blade of the first cutter 4221 faces the first unwinding shaft 20, and the blade of the second cutter 4222 faces the second unwinding shaft 30. Both the first cutter 4221 and the second cutter 4222 are connected to a rotating shaft via a connector. The rotating shafts of the first cutter 4221 and the second cutter 4222 are connected to the swing arm 41 and are arranged parallel to each other. A first gear 42211 is provided at the end of the rotating shaft of the first cutter 4221, and a second gear 42221 is provided at the end of the rotating shaft of the second cutter 4222. The first gear 42211 and the second gear 42221 mesh. The first drive mechanism 4223 drives either the rotating shaft of the first cutter 4221 or the rotating shaft of the second cutter 4222 to rotate, thereby driving the first cutter 4221 and the second cutter 4222 to rotate simultaneously in opposite directions under the action of the first gear 42211 and the second gear 42221.

[0066] In state 3 above, the first drive mechanism 4223 drives one of the shafts of the first cutter 4221 or the second cutter 4222 to rotate in the first direction. The first cutter 4221 rotates toward the first unwinding shaft 20, thereby cutting the material strip 1 (although the second cutter 4222 also rotates toward the second unwinding shaft 30 at this time, since there is no material strip 1 on the side of the second cutter 4222, it does not have a cutting effect).

[0067] In state 7 described above, the first drive mechanism 4223 drives one of the shafts of the first cutter 4221 or the second cutter 4222 to rotate in the first direction. The first cutter 4221 rotates toward the second unwinding shaft 30, thereby cutting the material strip 1 (although the first cutter 4221 also rotates toward the first unwinding shaft 20 at this time, since there is no material strip 1 on the side of the first cutter 4221, it does not have a cutting effect).

[0068] In other states, the first drive mechanism 4223 drives one of the shafts of the first cutter 4221 or the second cutter 4222 to rotate in the second direction, and both the first cutter 4221 and the second cutter 4222 are in the retracted position.

[0069] like Figure 4 As shown, the first drive mechanism 4223 includes a linear mechanism (cylinder, electric actuator, etc.) and a linkage structure. The first end of the linkage structure is rotatably connected to the drive end of the linear mechanism, and the second end of the linkage structure is rotatably connected to either the rotating shaft of the first cutter 4221 or the rotating shaft of the second cutter 4222. The linkage structure can convert the linear movement of the drive end of the linear mechanism into rotation of either the rotating shaft of the first cutter 4221 or the rotating shaft of the second cutter 4222.

[0070] Of course, the first drive mechanism 4223 can also be a motor, and the motor shaft can be directly coaxially connected to one of the rotating shafts of the first cutter 4221 or the second cutter 4222.

[0071] like Figure 2 and Figure 4 As shown, in this embodiment, the tape-connecting mechanism 40 further includes a third drive mechanism 43 and a fourth drive mechanism 44. The third drive mechanism 43 is fixedly mounted on the frame 10, and its drive end is adapted to move axially along the first unwinding shaft 20 and the second unwinding shaft 30. The fourth drive mechanism 44 is connected to the drive end of the third drive mechanism 43, and its drive end is adapted to rotate. The second end of the swing arm 41 is connected to the drive end of the fourth drive mechanism 44. When the tape-connecting mechanism 40 is in the first tape-connecting position or the second tape-connecting position, the drive end of the third drive mechanism 43 retracts; when the tape-connecting mechanism 40 is in the avoidance position, the drive end of the third drive mechanism 43 extends, so that the tape-pressing and cutting assembly 42 is misaligned with the tape 1.

[0072] Specifically, when the drive end of the third drive mechanism 43 extends or retracts, it drives the fourth drive mechanism 44, the swing arm 41, and the tape cutting assembly 42 to move axially along the first unwinding shaft 20 and the second unwinding shaft 30. Therefore, along the axial direction of the first unwinding shaft 20 and the second unwinding shaft 30, the tape cutting assembly 42 can be in the same position as or offset from the tape 1. Simultaneously, when the drive end of the fourth drive mechanism 44 rotates, it causes the swing arm 41 and the tape cutting assembly 42 to swing as a whole.

[0073] In states 2, 3, 6, and 7 described above, the drive end of the third drive mechanism 43 retracts, thereby enabling the pressure strip cutting assembly 42 to be in the same position as the material strip 1. At this time, the pressure roller 421 can contact the material strip 1, and the cutting mechanism 422 can cut the material strip 1.

[0074] In other states, the drive end of the third drive mechanism 43 extends, thereby enabling the pressure tape cutting assembly 42 to be misaligned with the material strip 1, preventing the swing arm 41 and the pressure tape cutting assembly 42 from interfering with the unwinding of the material strip 1.

[0075] Furthermore, by misaligning the swing arm 41 and the tape cutting assembly 42 with the tape 1, the relative position of the tape cutting assembly 42 and the tape 1 can be adjusted. In state 1, the drive end of the third drive mechanism 43 extends, thereby misaligning the tape cutting assembly 42 with the tape 1, and then the drive end of the fourth drive mechanism 44 rotates, positioning the tape cutting assembly 42 between the tape 1 and the second unwinding shaft 30. In state 5, the drive end of the third drive mechanism 43 extends, thereby misaligning the tape cutting assembly 42 with the tape 1, and then the drive end of the fourth drive mechanism 44 rotates, positioning the tape cutting assembly 42 between the tape 1 and the first unwinding shaft 20.

[0076] Preferably, the third drive mechanism 43 can be a linear mechanism (cylinder, electric actuator, etc.), and the fourth drive mechanism 44 can be a motor.

[0077] like Figure 2 and Figure 4 As shown, in the technical solution of this embodiment, the tape receiving mechanism 40 further includes a first mounting base 45 and a slide 46. The first mounting base 45 is fixedly mounted on the frame 10, and the slide 46 is slidably mounted on the first mounting base 45. The third driving mechanism 43 is mounted on the first mounting base 45, and the fourth driving mechanism 44 is mounted on the slide 46.

[0078] Specifically, the first mounting base 45 has an elongated structure, with one end fixed to the frame 10 and the other end extending axially along the first unwinding shaft 20 and the second unwinding shaft 30. A slide 46 is disposed on the upper surface of the first mounting base 45, and a guide structure (slide rail, slider, etc.) is provided between the first mounting base 45 and the slide 46. The third drive mechanism 43 is disposed on the first mounting base 45, and when the drive end of the third drive mechanism 43 extends or retracts, it drives the slide 46 to slide on the first mounting base 45.

[0079] Furthermore, the fourth drive mechanism 44 is mounted on the slide 46, so the slide 46 slides on the first mounting base 45, thereby driving the fourth drive mechanism 44, the swing arm 41 and the tape cutting assembly 42 to move as a whole along the axial direction of the first unwinding shaft 20 and the second unwinding shaft 30.

[0080] like Figure 2 , Figure 4 and Figure 7 As shown, in the technical solution of this embodiment, the pressure belt cutting assembly 42 further includes an adjusting roller 423. Along the traveling direction of the material belt 1, the adjusting roller 423 is located upstream of the cutting mechanism 422. When the belt receiving mechanism 40 is in the first belt receiving position or the second belt receiving position, the adjusting roller 423 and the pressure roller 421 are in contact with the material belt 1 so that the cutting mechanism 422 and the material belt 1 maintain a preset angle.

[0081] Specifically, the cutting mechanism 422 is located between the pressure roller 421 and the adjusting roller 423. The function of the adjusting roller 423 is to keep the material belt 1 taut outside the cutting mechanism 422 when the belt receiving mechanism 40 is in the first belt receiving position or the second belt receiving position, and to keep the cutting mechanism 422 and the material belt 1 at a 90° angle, thereby ensuring the cutting effect.

[0082] like Figure 1 As shown, in this embodiment, the strip unwinding device further includes a first roller passing mechanism 51 and a second roller passing mechanism 52. The first roller passing mechanism 51 and the second roller passing mechanism 52 are spaced apart along the direction from the first unwinding shaft 20 to the second unwinding shaft 30. The first roller passing mechanism 51 is adapted to tension and correct the strip 1 on the first unwinding shaft 20, and the second roller passing mechanism 52 is adapted to tension and correct the strip 1 on the second unwinding shaft 30.

[0083] Specifically, with Figure 1 To illustrate, the first roller guide mechanism 51 and the second roller guide mechanism 52 are arranged in a mirror image symmetrically along the middle of the frame 10. The first roller guide mechanism 51 is located near the first unwinding shaft 20, and the second roller guide mechanism 52 is located near the second unwinding shaft 30.

[0084] like Figures 6 to 14As shown, in this embodiment, the first roller guide mechanism 51 and the second roller guide mechanism 52 have the same structure. Therefore, both the first roller guide mechanism 51 and the second roller guide mechanism 52 include a correction roller 501 and a tension roller 502. The correction roller 501 is fixedly mounted on the frame 10 and is located downstream of the pressure strip cutting assembly 42 along the travel direction of the material belt 1. The tension roller 502 is movably mounted on the frame 10 and has a tensioned position and a retracted position. Along the travel direction of the material belt 1, the tensioned position is located upstream of the pressure strip cutting assembly 42, and the retracted position is located downstream of the pressure strip cutting assembly 42. When the first unwinding shaft 20 and the second unwinding shaft 30 unwind the material belt 1, the tension roller 502 moves to the tensioned position. When the pressure strip cutting assembly 42 is located at the first or second connection position, the tension roller 502 moves to the retracted position.

[0085] Specifically, the correction roller 501 is fixedly mounted on the frame 10 and is used to correct the deviation of the strip 1 after unwinding. The tension roller 502 is used to tension the strip 1 during the unwinding process. Figure 6 and Figure 8 As shown in the diagram, the tension roller 502 is located below the correction roller 501, and the tension roller 502 can move vertically. When the tension roller 502 moves upward and is above the pressure roller 421, the tension roller 502 is in the retracted position. When the tension roller 502 moves downward and is below the adjusting roller 423, the tension roller 502 is in the tensioned position.

[0086] Furthermore, when the tension roller 502 is in the tensioned position, it can tension the material belt 1; when the tension roller 502 is in the retracted position, it can avoid interfering with the connection of the material belt 1.

[0087] In state 1, the tensioning roller 502 of the first roller passing mechanism 51 is in the retracted position, and the tensioning roller 502 of the second roller passing mechanism 52 is in the tensioned position.

[0088] In state 2, the tension roller 502 of the first roller passing mechanism 51 is in the retracted position, and the tension roller 502 of the second roller passing mechanism 52 is in the retracted position.

[0089] In state 3, the tension roller 502 of the first roller passing mechanism 51 is in the retracted position, and the tension roller 502 of the second roller passing mechanism 52 is in the retracted position.

[0090] In state 4, the tensioning roller 502 of the first roller passing mechanism 51 is in the tensioned position, and the tensioning roller 502 of the second roller passing mechanism 52 is in the retracted position.

[0091] In state 5, the tensioning roller 502 of the first roller passing mechanism 51 is in the tensioned position, and the tensioning roller 502 of the second roller passing mechanism 52 is in the retracted position.

[0092] In state 6, the tension roller 502 of the first roller passing mechanism 51 is in the retracted position, and the tension roller 502 of the second roller passing mechanism 52 is in the retracted position.

[0093] In state 7, the tension roller 502 of the first roller passing mechanism 51 is in the retracted position, and the tension roller 502 of the second roller passing mechanism 52 is in the retracted position.

[0094] In state 8, the tensioning roller 502 of the first roller passing mechanism 51 is in the retracted position, and the tensioning roller 502 of the second roller passing mechanism 52 is in the tensioned position.

[0095] like Figure 5 As shown, in the technical solution of this embodiment, both the first roller guide mechanism 51 and the second roller guide mechanism 52 further include a second mounting base 503 and a fifth drive mechanism 504. The second mounting base 503 is fixedly mounted on the frame 10, the correction roller 501 is fixedly mounted on the second mounting base 503, the fifth drive mechanism 504 is mounted on the second mounting base 503, the drive end of the fifth drive mechanism 504 is adapted to move in a straight line, and the tension roller 502 is connected to the drive end of the fifth drive mechanism 504.

[0096] Specifically, the second mounting base 503 is disposed on the back of the support plate of the frame 10. The support plate has a through hole through which the correction roller 501 extends to the front of the support plate. The support plate has a groove through which the tension roller 502 extends to the front of the support plate, and the groove extends vertically to match the movement trajectory of the tension roller 502.

[0097] Example 2

[0098] like Figure 15 As shown, the difference between Embodiment 2 of the tape unwinding device according to this application and Embodiment 1 described above is that the cutting mechanism 422 includes a first cutter 4221, a second cutter 4222, a first drive mechanism 4223, and a second drive mechanism 4224. The drive end of the first drive mechanism 4223 is connected to the first cutter 4221, and the drive end of the second drive mechanism 4224 is connected to the second cutter 4222. When the tape receiving mechanism 40 is in the first tape receiving position, the first drive mechanism 4223 drives the first cutter 4221 to extend toward the first unwinding shaft 20. When the tape receiving mechanism 40 is in the second tape receiving position, the second drive mechanism 4224 drives the second cutter 4222 to extend toward the second unwinding shaft 30.

[0099] Specifically, the blade of the first cutter 4221 extends toward the first unwinding shaft 20, and the blade of the second cutter 4222 extends toward the second unwinding shaft 30. The first drive mechanism 4223 can drive the first cutter 4221 to extend or retract independently, and the second drive mechanism 4224 can drive the second cutter 4222 to extend or retract independently.

[0100] Preferably, the first drive mechanism 4223 and the second drive mechanism 4224 can be linear mechanisms, such as cylinders, electric actuators, etc.

[0101] Example 3

[0102] like Figure 16 As shown, the difference between Embodiment 3 of the tape unwinding device according to this application and Embodiment 1 described above is that the cutting mechanism includes a swing arm 4225, a cutter 4226, and a first drive mechanism. The first end of the swing arm 4225 is rotatably connected to the swing arm 41, and the cutter 4226 is disposed on the second end of the swing arm 41. The cutter 4226 includes a first cutting edge 42261 and a second cutting edge 42262 located on both sides. When the tape receiving mechanism 40 is in the first tape receiving position, the first drive mechanism drives the cutter 4226 to swing toward the first unwinding shaft 20. When the tape receiving mechanism 40 is in the second tape receiving position, the first drive mechanism drives the cutter 4226 to swing toward the second unwinding shaft 30.

[0103] Specifically, the first cutting edge 42261 faces the first unwinding spool 20, and the second cutting edge 42262 faces the second unwinding spool 30.

[0104] Preferably, the first drive mechanism is a motor.

[0105] This application also provides a battery production line, including the aforementioned strip unwinding equipment.

[0106] Based on the above, this patent application has the following advantages:

[0107] 1. The first unwinding shaft 20 and the second unwinding shaft 30 do not need to rotate as a whole, which makes the structure simple, occupies little space, and has low cost;

[0108] 2. The conveyor belt splicing can be automated, reducing manual labor intensity and improving production efficiency.

[0109] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A strip unwinding device, characterized in that, include: A frame (10); a first unwinding shaft (20) and a second unwinding shaft (30) are fixedly spaced on the frame (10). The tape feeding mechanism (40) includes a swing arm (41) and a tape cutting assembly (42). The first end of the swing arm (41) is rotatably mounted on the frame (10), and the second end of the swing arm (41) is adapted to swing between the first unwinding shaft (20) and the second unwinding shaft (30). The tape cutting assembly (42) is mounted on the second end of the swing arm (41). The tape receiving mechanism (40) has a first tape receiving position that swings to a position close to the first unwinding shaft (20), a second tape receiving position that swings to a position close to the second unwinding shaft (30), and a clearance position. When the tape receiving mechanism (40) is in the first tape receiving position, the tape pressing and cutting assembly (42) presses the tape (1) on the second unwinding shaft (30) onto the tape (1) on the first unwinding shaft (20) and cuts the tape (1). When the tape receiving mechanism (40) is in the second tape receiving position, the tape pressing and cutting assembly (42) presses the tape (1) on the first unwinding shaft (20) onto the tape (1) on the second unwinding shaft (30) and cuts the tape (1). When the tape receiving mechanism (40) is in the clearance position, the tape pressing and cutting assembly (42) clears the tape (1). The strip unwinding device also includes a first roller passing mechanism (51) and a second roller passing mechanism (52). The first roller passing mechanism (51) and the second roller passing mechanism (52) are spaced apart along the direction from the first unwinding shaft (20) to the second unwinding shaft (30). The first roller passing mechanism (51) is adapted to tension and correct the strip (1) on the first unwinding shaft (20), and the second roller passing mechanism (52) is adapted to tension and correct the strip (1) on the second unwinding shaft (30). Both the first roller passing mechanism (51) and the second roller passing mechanism (52) include a correction roller (501) and a tension roller (502). The correction roller (501) is fixedly mounted on the frame (10) and is located downstream of the belt pressing and cutting assembly (42) along the traveling direction of the belt (1). The tension roller (502) is movably mounted on the frame (10) and has a tensioned position and a retracted position. Along the travel direction of the strip (1), the tensioning position is located upstream of the pressure strip cutting assembly (42), and the retraction position is located downstream of the pressure strip cutting assembly (42). When the first unwinding shaft (20) and the second unwinding shaft (30) unwind the strip (1), the tensioning roller (502) moves to the tensioning position. When the pressure strip cutting assembly (42) is located at the first or second connection position, the tensioning roller (502) moves to the retraction position.

2. The strip unwinding device according to claim 1, characterized in that, The tape cutting assembly (42) includes a pressure roller (421) and a cutting mechanism (422). In the traveling direction along the tape (1), the pressure roller (421) is located downstream of the cutting mechanism (422). The cutting mechanism (422) is movably mounted on the swing arm (41). When the tape receiving mechanism (40) is in the first tape receiving position, the cutting mechanism (422) extends toward the first unwinding shaft (20). When the tape receiving mechanism (40) is in the second tape receiving position, the cutting mechanism (422) extends toward the second unwinding shaft (30).

3. The strip unwinding device according to claim 2, characterized in that, The cutting mechanism (422) includes a first cutter (4221), a second cutter (4222), and a first drive mechanism (4223). The first cutter (4221) and the second cutter (4222) are rotatably mounted on the swing arm (41) and are arranged opposite to each other. A first gear (42211) is provided on the first cutter (4221), and a second gear (42221) is provided on the second cutter (4222). The first gear (42211) and the second gear (42221) mesh. The first drive mechanism (4223) drives the first cutter (4221) or the second cutter (4222) to rotate.

4. The strip unwinding device according to claim 2, characterized in that, The cutting mechanism (422) includes a first cutter (4221), a second cutter (4222), a first drive mechanism (4223), and a second drive mechanism (4224). The drive end of the first drive mechanism (4223) is connected to the first cutter (4221), and the drive end of the second drive mechanism (4224) is connected to the second cutter (4222). When the tape receiving mechanism (40) is in the first tape receiving position, the first drive mechanism (4223) drives the first cutter (4221) to extend toward the first unwinding shaft (20). When the tape receiving mechanism (40) is in the second tape receiving position, the second drive mechanism (4224) drives the second cutter (4222) to extend toward the second unwinding shaft (30).

5. The strip unwinding device according to claim 2, characterized in that, The cutting mechanism includes a swing arm (4225), a cutter (4226), and a first drive mechanism. The first end of the swing arm (4225) is rotatably connected to the swing arm (41). The cutter (4226) is disposed on the second end of the swing arm (41). The cutter (4226) includes a first cutting edge (42261) and a second cutting edge (42262) located on both sides. When the tape receiving mechanism (40) is in the first tape receiving position, the first drive mechanism drives the cutter (4226) to swing toward the first unwinding shaft (20). When the tape receiving mechanism (40) is in the second tape receiving position, the first drive mechanism drives the cutter (4226) to swing toward the second unwinding shaft (30).

6. The strip unwinding device according to any one of claims 2 to 5, characterized in that, The tape receiving mechanism (40) further includes a third drive mechanism (43) and a fourth drive mechanism (44). The third drive mechanism (43) is fixedly mounted on the frame (10). The drive end of the third drive mechanism (43) is adapted to move along the axial direction of the first unwinding shaft (20) and the second unwinding shaft (30). The fourth drive mechanism (44) is connected to the drive end of the third drive mechanism (43). The drive end of the fourth drive mechanism (44) is adapted to rotate. The second end of the swing arm (41) is connected to the drive end of the fourth drive mechanism (44). When the tape receiving mechanism (40) is in the first tape receiving position or the second tape receiving position, the drive end of the third drive mechanism (43) retracts. When the tape receiving mechanism (40) is in the avoidance position, the drive end of the third drive mechanism (43) extends out so that the tape cutting assembly (42) is misaligned with the tape (1).

7. The strip unwinding device according to claim 6, characterized in that, The belt receiving mechanism (40) further includes a first mounting base (45) and a slide (46). The first mounting base (45) is fixedly mounted on the frame (10), and the slide (46) is slidably mounted on the first mounting base (45). The third driving mechanism (43) is mounted on the first mounting base (45), and the fourth driving mechanism (44) is mounted on the slide (46).

8. The strip unwinding device according to any one of claims 2 to 5, characterized in that, The pressure strip cutting assembly (42) also includes an adjusting roller (423). In the traveling direction along the material strip (1), the adjusting roller (423) is located upstream of the cutting mechanism (422). When the tape receiving mechanism (40) is in the first tape receiving position or the second tape receiving position, the adjusting roller (423) and the pressure roller (421) are in contact with the material strip (1) so that the cutting mechanism (422) and the material strip (1) maintain a preset angle.

9. The strip unwinding device according to claim 1, characterized in that, The first roller guide mechanism (51) and the second roller guide mechanism (52) each include a second mounting base (503) and a fifth drive mechanism (504). The second mounting base (503) is fixedly mounted on the frame (10). The correction roller (501) is fixedly mounted on the second mounting base (503). The fifth drive mechanism (504) is mounted on the second mounting base (503). The drive end of the fifth drive mechanism (504) is adapted to move in a straight line. The tension roller (502) is connected to the drive end of the fifth drive mechanism (504).

10. A battery production line, characterized in that, The tape unwinding device includes any one of claims 1 to 9.

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