Battery cell winding and inserting device

Abstract

The utility model discloses a battery cell winding and inserting device, which comprises a first driving unit, a second driving unit, a third driving unit, a turnover mechanism and two winding and inserting mechanisms, each winding and inserting mechanism comprises a winding component, an inserting component and a rotating seat, the winding component is connected to the rotating seat in a sliding manner, the inserting component is connected to the winding component in a sliding manner, and the rotating seat is connected to the rotating seat in a sliding manner. The turnover mechanism drives the winding and inserting mechanism to be switched between a first station and a second station, the first driving unit drives the winding assembly at the first station, and the second driving unit drives the inserting assembly at the first station; the winding assembly is provided with a limiting structure matched with the insertion piece assembly at the matching position, and the limiting structure limits the insertion piece assembly to slide forwards in the axial direction relative to the winding assembly from the matching position. The third driving unit drives the winding assembly located at the second station to slide in the reverse direction of the axial direction, and meanwhile the limiting structure forces the inserting piece assembly to slide in the reverse direction of the axial direction. According to the device, a driving mechanism can be simplified when the rolled sheet and the inserted sheet are retracted, so that the equipment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery cell production, and in particular to a cell winding and inserting device. Background Technology

[0002] In the lithium battery production process, electrode strip raw materials need to be wound to form a cell. However, it is difficult to ensure stable winding tension during the winding process. In addition, the expansion and contraction of the electrode strip can easily cause the cell to deform and become unusable. The existing method is to insert a insert after the cell has been wound to a certain number of turns during the winding process. After the winding is completed, the insert is pulled out. The space formed by the insert absorbs the deformation of the cell to solve the above problems.

[0003] Utility model patent CN210576290U discloses a winding device for preventing deformation of lithium battery cells. It is a dual-station winding insert. The disclosed winding insert operation mode is as follows: at the first winding station, the first cylinder drives the coil to extend and rotate a certain number of times, and then the second cylinder drives the insert to extend. At the second unloading station, the third and fourth cylinders drive the retraction of the insert and the retraction of the coil, respectively. A total of four drive units are used to drive the extension and retraction of the insert and the coil. The design of the drive mechanism is redundant, which not only increases the design complexity of the entire automation device and the cost, but also makes the transmission design complex and difficult to maintain. Utility Model Content

[0004] The purpose of this invention is to provide a battery cell winding and inserting device that reduces the complexity of automation.

[0005] This utility model provides a battery cell winding and inserting device, including a first driving unit and a second driving unit corresponding to a first work station, a third driving unit corresponding to the second work station, a rotating flipping mechanism, and two winding and inserting mechanisms symmetrically arranged at the circumferential position of the rotating flipping mechanism. Each winding and inserting mechanism includes a winding assembly, an inserting assembly, and a rotating seat rotatably disposed on the flipping mechanism. The winding assembly is slidably connected to the rotating seat along the axial direction, and the inserting assembly is slidably connected to the winding assembly along the axial direction of the rotating seat. The flipping mechanism can rotate and drive the two winding and inserting mechanisms to switch between the first and second work stations. The first driving unit drives the winding assembly located at the first work station to slide forward axially, and the second driving unit drives the inserting assembly located at the first work station to slide forward axially. The winding assembly is provided with a limiting structure that mates with the inserting assembly at a mating position, restricting the inserting assembly from sliding forward axially relative to the winding assembly from the mating position. The third driving unit drives the winding assembly located at the second work station to slide backward axially, while the limiting structure simultaneously forces the inserting assembly to slide backward axially.

[0006] As can be seen from the above scheme, the limiting structure of the winding assembly can simultaneously force the insert assembly to retract when the third drive unit drives the winding assembly to retract and unload, so that one drive unit drives both the winding and insert assemblies, simplifying the drive mechanism. Similarly, it can achieve dual-station unloading of the winding assembly. This application only uses three drive units, which can save one drive unit compared to the prior art.

[0007] A preferred embodiment is that the winding assembly includes a sleeve portion that passes through and is slidably connected to the axis of the rotating seat along the axial direction. A winding sheet is connected to the first end of the sleeve portion, a limiting structure is provided at the second end of the sleeve portion, and the movable end of the third drive unit cooperates with the limiting structure located at the second station.

[0008] As can be seen, the sleeve part is inserted and slidably connected to the rotating seat. The winding assembly is divided into a winding pole strip on one side of the rotating seat and a driven part on the other side, which makes the functional areas of the device more clearly distinguished, avoids mutual interference and facilitates replacement and maintenance. The limiting structure can not only force the insert assembly to slide in the opposite direction of the axial direction, but also play a role in cooperating with the third drive unit to drive the winding assembly.

[0009] A further solution is that the movable end of the third drive unit is provided with a locking protrusion, and the limiting structure includes two spaced retaining rings and an annular groove located between the two retaining rings. The annular groove is arranged around the sleeve portion, and the annular groove and the locking protrusion cooperate at the second working position. The third drive unit drives the sleeve portion to slide in the opposite direction of the axial direction through the cooperation of the locking protrusion and the annular groove.

[0010] As can be seen, the cam can be inserted into the annular groove between the two retaining rings, thereby driving the limiting structure, winding assembly and insert assembly to move. The annular groove is set around the sleeve part, and the cam can cooperate with the annular groove at any rotation angle of the sleeve part.

[0011] A further embodiment includes a insert assembly comprising a shaft portion that passes axially through and is slidably connected to the axis of a sleeve portion. A insert is connected to a first end of the shaft portion near the wound portion, and a pull block is provided at a second end of the shaft portion away from the wound portion. A push block is provided between the insert and the pull block, and the push block engages with a limiting structure at a mating position to restrict the insert assembly from sliding axially forward relative to the winding assembly from the mating position. The movable end of a first drive unit engages with a limiting structure located at a first station, and the first drive unit drives the sleeve portion to slide axially forward through the engagement of its movable end with the limiting structure. The movable end of a second drive unit engages with a pull block located at the first station, and the second drive unit drives the shaft portion to slide axially forward through the engagement of its movable end with the pull block.

[0012] As can be seen, the shaft part of the insert assembly also includes inserts at both ends and a pull block that cooperates with the second drive unit at the first station. The push block can cooperate with the limiting structure and be pushed by the limiting structure at the second station to drive the insert assembly to slide.

[0013] A further option is that the movable end of the first drive unit is provided with a first roller, the rotation axis of the first roller is perpendicular to the axial direction, and the first roller cooperates with the limiting structure located at the first work station.

[0014] Therefore, the second station is the unloading station, which only needs to retract the winding assembly and insert assembly after they have stopped rotating, using a locking protrusion. The first station is the winding station, where the winding assembly needs to rotate after the first drive unit extends it. The first roller is set to make rolling contact with the limiting structure to reduce the friction between the two.

[0015] A further option is that the movable end of the second drive unit is provided with two second rollers in sequence along the axial direction. The rotation axis of the second rollers is perpendicular to the axial direction. When the second drive unit drives the insert assembly located at the first station, the pull block located at the first station engages between the two second rollers.

[0016] It can be seen that the rotation of the winding assembly will drive the insert assembly to rotate together. The second roller can also reduce the friction between the pull block and the second roller. The second roller closer to the rotating seat can support the pull block on the insert assembly when the first drive unit drives the winding assembly to extend, preventing the insert assembly from being driven to extend synchronously. The second roller farther away from the rotating seat can push the pull block and the insert assembly to extend after the winding assembly rotates a certain angle.

[0017] A further embodiment includes a fourth drive unit located at the movable end of the second drive unit, with two second rollers located at the movable end of the fourth drive unit. The fourth drive unit drives the two second rollers away from or towards the pull block, and the second drive unit drives the fourth drive unit and the two second rollers to move axially.

[0018] Therefore, in order to disengage the first and second drive cylinders from the winding and inserting shafts after pushing the coil and insert out, the existing technology also includes a fifth drive cylinder. This solution incorporates a fourth drive unit adapted to the structure of this device. When the pull block needs to be supported or pushed, it can drive the two second rollers to approach and engage with both sides of the pull block. Upon completion of the push, it can drive the two second rollers away from the pull block. Simultaneously, the second drive unit retracts axially in the opposite direction, which not only allows the two second rollers to return to their original position in advance, awaiting the insertion assembly after unloading at the second station, but also prevents the two rollers from continuously engaging the pull block, thus affecting the rotation of the insertion assembly. Attached Figure Description

[0019] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0020] Figure 1 This is a structural diagram from a first-view perspective of an embodiment of this utility model.

[0021] Figure 2 This is a structural diagram from a second perspective of an embodiment of this utility model.

[0022] Figure 3 This is a structural diagram from a third perspective of an embodiment of this utility model.

[0023] Figure 4 yes Figure 3 A magnified view of point A. Detailed Implementation

[0024] The technical solution of this utility model 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 this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] This embodiment provides a battery cell winding and inserting device, such as... Figures 1 to 4 As shown, the battery cell winding and inserting device includes a flipping mechanism 1 rotatable about an axis 11. Two winding and inserting mechanisms are respectively arranged on both sides of the circumferential position of the rotating axis of the flipping mechanism 1. This battery cell winding and inserting device includes a first station 3 for winding and inserting, and a second station 4 for unloading. The flipping mechanism 1 can drive the two winding and inserting mechanisms to flip and switch between the first station 3 and the second station 4. Each winding and inserting mechanism includes a winding assembly, an inserting assembly, and a rotating seat 23, wherein the rotating seat 23 rotates around an axis parallel to the flipping mechanism axis 11. The extension direction is rotatably disposed on the flipping mechanism 1, and the rotation axis of the rotating seat 23 is parallel to the rotation axis of the flipping mechanism 1. The winding assembly includes a sleeve portion 211, which passes through and is slidably connected to the axis of the rotating seat 23. The insert assembly includes a shaft portion 221, which passes through and is slidably connected to the axis of the sleeve portion 211. The rotating seat 23, the sleeve portion 211 and the shaft portion 221 are sequentially sleeved from large to small. The rotating seat 23 can be driven by a motor to rotate, and at the same time drive the winding assembly and the insert assembly to rotate.

[0026] The first ends of the sleeve portion 211 and the shaft portion 221 extend out toward the rotating seat 23 and are respectively provided with a rolled plate 212 and an insert plate 222. The second end of the sleeve portion 211 is provided with a limiting structure 213, and the second end of the shaft portion 221 is provided with a pull block 223. Furthermore, the shaft portion 221 is also provided with a push block 224 that cooperates with the limiting structure 213 between the insert plate 222 and the pull block 223.

[0027] The device is also provided with a first drive unit 5 and a second drive unit 62 located at the first work station 3 and a third drive unit 7 located at the second work station 4. It should be noted that the drive units described in this embodiment are all drive cylinders.

[0028] The movable end of the first drive unit 5 is a first roller 51 whose rotation axis is perpendicular to the sliding direction of the sleeve portion 211. The first drive unit 5 can drive the limiting structure 213 located at the first work station 3, as well as the sleeve portion 211 and the winding piece 212 connected thereto, to extend and wind. The movable end of the second drive unit 62 is provided with two second rollers 61 arranged along the sliding direction of the shaft portion 221, and the rotation axis of the second rollers 61 is perpendicular to the sliding direction of the shaft portion 221. The two second rollers 61 can clamp the pull block 223 between them, and through the drive of the second drive unit 62, the shaft portion 221 is driven to slide, thereby extending the insert piece 222.

[0029] This embodiment also includes a fourth driving unit 63, such as... Figure 1 and Figure 2 As shown, the moving direction of the movable end of the second drive unit 62 is parallel to the sliding direction of the shaft portion 221, and the moving direction of the movable end of the fourth drive unit 63 is perpendicular to the moving direction of the movable end of the second drive unit 62. The fourth drive unit 63 is disposed at the movable end of the second drive unit 62, and two second rollers 61 are disposed at the movable end of the fourth drive unit 63. The second drive unit 62 can drive the entire fourth drive unit 63 and the two rollers on the fourth drive unit 63 to move along the sliding direction of the shaft portion 221. The fourth drive unit 63 can drive the two second rollers 61 to move closer to or away from the pull block 223, thereby causing the second drive unit 62 to be linked with the shaft portion 221 or to be disengaged from the shaft portion 221.

[0030] In this embodiment, the movable end of the third drive unit 7 is a locking protrusion 71, and the limiting structure 213 includes two retaining rings 215 that extend from the axial center of the sleeve portion 211 in the circumferential direction. The two retaining rings 215 have an annular groove 214 that cooperates with the locking protrusion 71. The third drive unit 7 can drive the locking protrusion 71 located between the annular grooves 214 to drive the sleeve portion 211 and the winding piece 212 to retract. Due to the abutting action of the push block 224 and the limiting structure 213, when the sleeve portion 211 retracts, it will drive the shaft portion 221 to retract synchronously, completing the simultaneous retraction of the winding piece 212 and the insert piece 222.

[0031] The specific working principle of the battery cell winding insert device provided in this embodiment is as follows: at the first station 3, the first drive unit 5 pushes the sleeve part and the winding piece 212 to extend and wind through the cooperation of the first roller 51 and the limiting structure 213. At this time, the limiting structure 213 and the push block 224 disengage and abut. Since the pull block 223 is stuck between the two second rollers 61, the shaft part 221 will not move with the sleeve part. After the electrode strip has been wound to a certain number of turns, the second drive unit 62, through the cooperation of the second roller 61 and the pull block 223, pushes the shaft part 221 and the insert 222 to extend out to the wound electrode strip to continue rotating. The limiting structure 213 and the push block 224 re-engage. At this time, the fourth drive unit 63 drives the second roller 61 to disengage from the pull block 223. The second drive unit 62 drives the fourth drive unit 63 and the second roller 61 to retract. The fourth drive unit 63 then drives the second roller 61 to extend, realizing the return of the second drive unit 62 to its original position. The first drive unit 5 also retracts after pushing the limiting structure 213 to achieve its original position. A total of three drive units complete the drive at this station.

[0032] The wound battery cell is flipped to the second station 4 by the flipping mechanism 1. At this time, the rotating seat 23 drives the sleeve part and the shaft part 221 to rotate a certain number of times and then stop. The third drive unit 7 drives the limiting structure 213 and the sleeve part to retract through the locking protrusion 71 at the movable end, completing the retraction of the winding 212. Since the limiting structure 213 abuts against the push block 224, the third drive unit 7 will synchronously drive the winding 212 and the insert 222 to retract. The wound battery cell falls down to complete the unloading. At this time, the winding insert 222 mechanism of the second station 4 is flipped to the first station 3 by the flipping mechanism 1. Since the first drive unit 5 and the second drive unit 62 have returned to their positions, when flipping to the first station 3, the limiting structure 213 is exactly engaged with the first roller 51, and the pull block 223 falls exactly between the two second rollers 61, thus performing the next winding. This station only requires one drive unit to complete the drive, which saves one drive unit compared with the prior art.

[0033] It should also be noted that in this embodiment, the second driving unit 62 can push the insert 22 out, retract it, and then push it out again to achieve secondary inserting, which meets the needs of some cells that require multiple inserting.

[0034] The above embodiments illustrate only one implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery cell winding and inserting device, comprising a first driving unit and a second driving unit corresponding to a first station, a third driving unit corresponding to a second station, a rotatable flipping mechanism, and two winding and inserting mechanisms symmetrically arranged at circumferential positions of the flipping mechanism. Each winding and inserting mechanism includes a winding assembly, an inserting assembly, and a rotating seat rotatably disposed on the flipping mechanism. The winding assembly is slidably connected to the rotating seat along the axial direction of the rotating seat, and the inserting assembly is slidably connected to the winding assembly along the axial direction of the rotating seat. The flipping mechanism is rotatable and drives the two winding and inserting mechanisms to switch between the first station and the second station. The first driving unit drives the winding assembly located at the first station to slide in the forward direction of the axial direction, and the second driving unit drives the inserting assembly located at the first station to slide in the forward direction of the axial direction. It is characterized in that The winding assembly is provided with a limiting structure that mates with the insert assembly at a mating position, the limiting structure restricting the insert assembly from sliding in the positive direction relative to the winding assembly from the mating position. The third driving unit drives the winding assembly located at the second station to slide in the opposite direction of the axial direction, while the limiting structure forces the insert assembly to slide in the opposite direction of the axial direction.

2. The battery cell winding and inserting device according to claim 1, characterized in that, The winding assembly includes a sleeve portion that passes through and is slidably connected to the axis of the rotating seat along the axial direction. A winding sheet is connected to a first end of the sleeve portion. A limiting structure is provided at a second end of the sleeve portion. The movable end of the third drive unit cooperates with the limiting structure located at the second work station.

3. The battery cell winding and inserting device according to claim 2, characterized in that, The movable end of the third drive unit is provided with a locking protrusion. The limiting structure includes two spaced retaining rings and an annular groove located between the two retaining rings. The annular groove is arranged around the sleeve portion. The annular groove and the locking protrusion cooperate at the second working position. The third drive unit drives the sleeve portion to slide in the opposite direction of the axial direction through the cooperation of the locking protrusion and the annular groove.

4. The battery cell winding and inserting device according to claim 2, characterized in that, The insert assembly includes a shaft portion that passes through and is slidably connected to the axis of the sleeve portion along the axial direction. A first end of the shaft portion near the wound portion is connected to an insert, and a pull block is provided at the second end of the shaft portion away from the wound portion. A push block is provided between the insert and the pull block, and the push block engages with the limiting structure at the engagement position, restricting the insert assembly from sliding forward relative to the winding assembly from the engagement position. The movable end of the first drive unit engages with the limiting structure located at the first station, and the first drive unit drives the sleeve portion to slide forward along the axial direction through the engagement of its movable end with the limiting structure. The movable end of the second drive unit engages with the pull block located at the first station, and the second drive unit drives the shaft portion to slide forward along the axial direction through the engagement of its movable end with the pull block.

5. A cell winding and inserting device according to claim 4, characterized in that, The movable end of the first drive unit is provided with a first roller, the rotation axis of the first roller is perpendicular to the axial direction, and the first roller cooperates with the limiting structure located at the first work station.

6. A cell winding and inserting device according to claim 4 or 5, characterized in that, The movable end of the second drive unit is provided with two second rollers in sequence along the axial direction. The rotation axis of the second rollers is perpendicular to the axial direction. When the second drive unit drives the insert assembly located at the first station, the pull block located at the first station engages between the two second rollers.

7. A cell winding and inserting device according to claim 6, characterized in that, It also includes a fourth drive unit, which is located at the movable end of the second drive unit. Two second rollers are located at the movable end of the fourth drive unit. The fourth drive unit drives the two second rollers away from or towards the pull block. The second drive unit drives the fourth drive unit and the two second rollers to move along the axial direction.

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