Lithium battery winding needle push-out device

Abstract

The utility model relates to a lithium battery winding needle push-out device in the field of lithium battery winding needles, which comprises a support frame, a bearing mounting seat is connected onto the support frame through a vertical plate, a central seat is coaxially connected in the bearing mounting seat, a rotatable winding shaft mechanism is arranged in the central seat, and the bottom end of the central seat is connected with a rotating disc. The reel mechanism comprises an inner sliding shaft, a winding needle and an outer rotating shaft, the inner sliding shaft is connected with a push-pull shaft sleeve, the side face of the supporting frame is connected with a telescopic driving piece through a supporting piece, the telescopic end of the telescopic driving piece is connected with a driving rod, the end of the driving rod is connected with a driving roller, and the end, close to the push-pull shaft sleeve, of the driving rod is connected with a check block; by means of linkage of rotation and push-out, the winding needle does not need to wait for push-out and then execute the rotation action after a battery cell is pulled out and blanking is completed, so that the winding needle can be pushed out while rotating, the action connection time is saved, and the winding production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery winding needles, specifically to a lithium battery winding needle ejection device. Background Technology

[0002] Lithium-ion batteries, with their advantages of high energy density, long cycle life, low self-discharge rate, and no memory effect, have a wide range of applications, including but not limited to core power sources in new energy vehicles, energy storage systems, and consumer electronics. Lithium-ion battery manufacturing technology is rapidly developing towards higher efficiency, higher precision, higher yield, and greater intelligence. Among these processes, cell winding, as a key step in lithium-ion battery manufacturing, directly affects the battery's capacity consistency, safety performance, and production costs.

[0003] Currently, lithium battery winding processes generally adopt dual-needle or single-needle winding structures. The basic structure of a dual-needle winding structure includes: a winding mechanism that uses a main winding needle and an auxiliary winding needle to clamp and wind the electrode and separator; a winding drive assembly that drives the winding needle to rotate at high speed to achieve tight winding of the electrode and separator; and a winding needle ejection and extraction mechanism that drives the winding needle to eject (positioning before winding) and extract (unloading after winding), thereby cooperating with the unloading mechanism to complete the cell transfer.

[0004] However, the existing technology for ejecting and removing the winding needle still has certain defects in actual production. After the existing winding needle is ejected and the electrode sheet and separator are wound and glued to form a battery cell, the winding needle needs to be pulled out from the battery cell and the finished battery cell needs to be unloaded by the feeding mechanism. After the feeding is completed, the winding needle is ejected and rotated at a set angle by the rotary disk mechanism to enter the next winding station. However, the existing winding needle ejection structure is relatively simple. The efficiency of the winding needle ejection and rotation driven by the rotary mechanism to enter the next process is low and it is not easy to perform linkage control, which affects the winding production efficiency. Utility Model Content

[0005] The purpose of this invention is to address the above-mentioned deficiencies by providing a lithium battery winding needle ejection device. This device solves the technical problem in the prior art where the linkage control between the ejection of the winding needle and its overall rotation into the next winding position is ineffective after the winding needle is removed from the battery cell, requiring a long waiting time and thus affecting winding production efficiency.

[0006] The objective of this utility model is achieved through the following means:

[0007] A lithium battery coil ejector includes a support frame with a bearing mounting seat connected to the support frame via a vertical plate. A central seat is coaxially connected within the bearing mounting seat, and a rotatable coil mechanism is installed inside the central seat. A rotating disk is connected to the bottom end of the central seat, and the rotating mechanism can drive the rotating disk to rotate the central seat. The coil mechanism includes an inner sliding shaft, a coil needle, and an outer rotating shaft. The coil needle is installed at one end of the inner sliding shaft, which passes through the outer rotating shaft and can drive the coil needle to extend and retract axially. One end of the inner sliding shaft passes through the rotating disk and is connected to a push-pull bushing. A telescopic drive is connected to the side of the support frame via a support member. The telescopic end of the telescopic drive extends toward the coil mechanism and is connected to a drive rod. The end of the drive rod is connected to a drive roller for driving the push-pull bushing to extend and retract the inner sliding shaft. A stop is connected to the end of the drive rod near the push-pull bushing. The stop extends along the rotation path of the central seat and is equipped with an ejector roller.

[0008] When the needle winding is completed, the retraction of the telescopic drive causes the drive roller to drive the thrust bushing to retract, and the needle retracts into the outer rotating shaft. When the rotating disk drives the center seat to rotate, the winding mechanism rotates synchronously, so that the inner sliding shaft can rotate along the ejector rollers arranged on the stop block through the push-pull bushing and be ejected synchronously through the telescopic drive.

[0009] Furthermore, as described above, the rotating mechanism includes a support base, a rotary motor, and a drive gear. The support base is mounted on the side of the support frame, the rotary motor is mounted on the support base, and the telescopic end of the rotary motor is coaxially connected to the drive gear. The outer periphery of the rotating disk is provided with helical teeth that mesh with the drive gear, so that the rotary motor can drive the rotating disk to rotate the central seat.

[0010] By directly driving the drive gear with the helical teeth of the rotating disk through the rotary motor, the rotating disk and the center seat can be rotated synchronously. At the same time, the rotation of the center seat can drive the winding mechanism to rotate synchronously, shortening the waiting time for the winding needle switching station, thereby improving the winding production efficiency.

[0011] Furthermore, as described above, a positioning block is connected to the rotating disk, and a positioning cylinder is connected to the upright plate. The telescopic end of the positioning cylinder extends toward the rotating disk, and the telescopic end of the positioning cylinder is connected to a clamping member for clamping the positioning block via a sliding block.

[0012] Once the rotary table has rotated to the set angle, the positioning cylinder engages with the positioning block on the rotary table via a clamping component. This allows for rapid mechanical locking after the rotary table stops, eliminating positioning deviations caused by rotational inertia or vibration. This ensures that the needle is precisely aligned with the next workstation after each rotation, improving control accuracy and reliability.

[0013] Furthermore, as described above, the support member includes a support plate and a mounting bracket disposed on the support plate. The support plate is connected to the side of the support frame, the mounting bracket is connected to the support plate, the telescopic drive member is connected to the mounting bracket, and the telescopic end of the telescopic drive member extends through a push-pull bushing.

[0014] The combination of the support plate and the mounting bracket provides a rigid support platform for the telescopic drive component. The extension of the telescopic end of the telescopic drive component to the push-pull bushing allows it to control the telescopic movement of the coil needle through the push-pull bushing.

[0015] Furthermore, as described above, the mounting bracket is connected to a sliding member, which includes a slider and a slide rail. The slide rail is connected to the mounting bracket, the slider is mounted on the slide rail, and a mounting block is connected to the slider. The telescopic end of the telescopic drive member is connected to the mounting block, one end of the drive rod is connected to the mounting block, and the other end of the drive rod extends toward the push-pull bushing.

[0016] The linear guiding structure of the slider and slide rail ensures that the extension and retraction of the drive rod proceeds smoothly along the fixed axis, reducing frictional resistance and lateral sway, ensuring uniform force on the push-pull bushing, and improving the smoothness and repeatability of the needle coil extension and retraction action.

[0017] Furthermore, as described above, the stop block is connected to the drive rod via a mounting part, and multiple ejector rollers are provided, with the multiple ejector rollers evenly distributed along the stop block.

[0018] Furthermore, as described above, the stop block extends along the arc rotation direction of the centerline seat, and the stop block is arranged in a semi-circular arc shape.

[0019] Multiple ejector rollers are evenly distributed along the arc of the stop block, which can continuously provide ejector force to the push-pull bushing during the rotation of the rotary disk. Thus, the winding needle can be ejected synchronously when the rotary disk is rotated. Compared with the existing technology that requires waiting for the ejection before rotation, the winding needle ejection process of this solution is seamlessly connected with the rotation action, which greatly saves waiting time, enhances the stability of linkage control, and thus improves the production efficiency of winding.

[0020] Furthermore, as described above, there are two drive rollers mounted on the drive rod, a push-pull portion is formed on the push-pull bushing, and a gap is formed between the two drive rollers for matching the push-pull portion.

[0021] The push-pull part of the push-pull bushing is symmetrically clamped by two drive rollers, so that when the winding needle completes the winding of the battery cell, the push-pull part is pulled out by the two drive rollers, ensuring that the pulling is transmitted to the inner sliding shaft and improving the reliability of the winding needle pulling action.

[0022] Furthermore, as described above, the reel mechanism is provided in two sets, which are arranged opposite to each other, and the telescopic drive component is paired with the reel mechanism.

[0023] The beneficial effects of this utility model are as follows: The extension of the telescopic drive component allows the drive roller on the drive rod to apply a pushing force to the push-pull bushing. The push-pull bushing, through the inner sliding shaft, causes the winding needle to protrude outside the center seat. After the winding needle completes the winding of the battery cell, it needs to be pulled out of the finished battery cell. The telescopic drive component drives the push-pull bushing to retract the inner sliding shaft, thereby pulling the winding needle out of the battery cell. This is then coordinated with the external unloading mechanism to unload the finished product. The rotating disk drives the center seat to rotate the entire winding mechanism. At this time, the inner sliding shaft, driven by the rotation of the center seat, can rotate along the ejector roller on the stop block through the push-pull bushing. This, in conjunction with the telescopic drive component, controls the drive rod and the stop block to eject, so that the ejector roller on the stop block applies a pushing force to the push-pull bushing simultaneously. This allows the winding mechanism to rotate and eject the winding needle at the same time. Through the linkage of rotation and ejection, the winding needle is already in the ejection state when it rotates to the next station. There is no need to wait for ejection after unloading before performing the rotation action, saving action connection time and thus improving winding production efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure from the left viewing angle in this embodiment;

[0025] Figure 2 This is a schematic diagram of the overall structure from the right-view angle in this embodiment;

[0026] Figure 3 This is a structural schematic diagram viewed from below in this embodiment;

[0027] Figure 4 This is a partial structural diagram of this embodiment;

[0028] Figure 5 for Figure 4 A magnified view of part A in the diagram;

[0029] Figure 6 This is a schematic diagram of the connection structure of the reel mechanism in this embodiment;

[0030] The reference numerals in the figure are as follows: 1-support frame, 2-vertical plate, 3-bearing mounting seat, 4-center seat, 5-rotating disk, 6-winding mechanism, 61-inner sliding shaft, 62-winding needle, 63-outer rotating shaft, 7-rotation mechanism, 71-support seat, 72-rotary motor, 73-drive gear, 8-push-pull bushing, 9-telescopic drive component, 10-drive rod, 11-drive roller, 12-stop block, 13-ejection roller, 14-helical toothed part, 15-positioning block, 16-positioning cylinder, 17-sliding block, 18-clamping component, 19-support plate, 20-mounting bracket, 21-slider, 22-slide rail, 23-mounting block, 24-push-pull part. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] In this embodiment, refer to Figures 1-6 The specific implementation of a lithium battery coil needle 62 ejection device includes a support frame 1. A bearing mounting seat 3 is connected to the support frame 1 via a vertical plate 2. A center seat 4 is coaxially connected inside the bearing mounting seat 3. A rotatable winding mechanism 6 is provided inside the center seat 4. A rotating disk 5 is connected to the bottom end of the center seat 4. The rotating disk 5 can be driven by a rotating mechanism 7 to drive the center seat 4 to rotate. The winding mechanism 6 includes an inner sliding shaft 61, a coil needle 62, and an outer rotating shaft 63. The coil needle 62 is installed at one end of the inner sliding shaft 61. The inner sliding shaft 61 passes through the outer rotating shaft 63 and can rotate along the shaft. The inner sliding shaft 61 passes through the rotating disk 5 and is connected to the push-pull bushing 8. The side of the support frame 1 is connected to the telescopic drive 9 through the support member. The telescopic end of the telescopic drive 9 extends toward the winding mechanism 6 and is connected to the drive rod 10. The end of the drive rod 10 is connected to the drive roller 11 for driving the push-pull bushing 8 to drive the inner sliding shaft 61 to telescopic movement. The end of the drive rod 10 near the push-pull bushing 8 is connected to the stop block 12. The stop block 12 is arranged and extended along the rotation path of the center seat 4. The stop block 12 is provided with the ejector roller 13.

[0033] When the winding needle 62 is completed, the retraction of the telescopic drive 9 causes the drive roller 11 to drive the thrust bushing to retract the inner sliding shaft 61, and the winding needle 62 retracts into the outer rotating shaft 63. When the rotating disk 5 drives the center seat 4 to rotate, the winding mechanism 6 rotates synchronously, so that the inner sliding shaft 61 can rotate along the ejector roller 13 arranged on the stop block 12 through the push-pull bushing 8 and be ejected synchronously through the telescopic drive 9.

[0034] Reference Figure 1 The rotating mechanism 7 includes a support base 71, a rotary motor 72, and a drive gear 73. The support base 71 is installed on the side of the support frame 1, the rotary motor 72 is installed on the support base 71, and the telescopic end of the rotary motor 72 is coaxially connected to the drive gear 73. The outer periphery of the rotating disk 5 is provided with helical teeth 14 that mesh with the drive gear 73, so that the rotary motor 72 can drive the rotating disk 5 to rotate the center seat 4.

[0035] The rotary motor 72 directly drives the drive gear 73 to mesh with the helical tooth part 14 of the rotary disk 5, realizing the synchronous rotation of the rotary disk 5 and the center seat 4. At the same time, the rotation of the center seat 4 can drive the winding mechanism 6 to rotate synchronously, shortening the waiting time for the winding needle 62 to switch positions, thereby improving the winding production efficiency.

[0036] By arranging the stop 12 along the rotation path of the center seat 4, the winding needle 62 on the winding mechanism 6 retracts and rotates synchronously with the rotating disk 5. Under the pushing and pulling action of the push-pull bushing 8 along the ejection roller 13, it is automatically ejected. Through the rotation of the rotating disk 5 and the ejection of the telescopic drive 9, the winding needle 62 is already in the ejection state when the rotating disk 5 drives it to the next station after being pulled out for feeding. There is no need to wait for the ejection action to be completed before the rotation action is performed, which significantly shortens the process connection time and solves the efficiency bottleneck caused by the separation of the ejection and rotation actions of the winding needle 62 in the traditional structure.

[0037] A positioning block 15 is connected to the rotating disk 5, and a positioning cylinder 16 is connected to the upright plate 2. The telescopic end of the positioning cylinder 16 extends toward the rotating disk 5, and the telescopic end of the positioning cylinder 16 is connected to a clamping member 18 for clamping the positioning block 15 through a sliding block 17.

[0038] After the rotating disk 5 rotates to the set angle, the positioning cylinder 16 cooperates with the positioning block 15 on the rotating disk 5 through the clamping part 18. This allows for rapid mechanical locking after the rotating disk 5 stops, eliminating positioning deviations caused by rotational inertia or vibration. This ensures that the position of the winding needle 62 is accurately aligned with the next workstation after each rotation, improving the accuracy and reliability of control.

[0039] Reference Figures 3-5 The support includes a support plate 19 and a mounting bracket 20 disposed on the support plate 19. The support plate 19 is connected to the side of the support frame 1. The mounting bracket 20 is connected to the support plate 19. The telescopic drive 9 is connected to the mounting bracket 20, and the telescopic end of the telescopic drive 9 extends by pushing and pulling the bushing 8.

[0040] The combination of support plate 19 and mounting bracket 20 provides a rigid support platform for telescopic drive component 9. The extension of the telescopic end of telescopic drive component 9 toward push-pull bushing 8 allows it to control the telescopic movement of the winding needle 62 through push-pull bushing 8.

[0041] The mounting bracket 20 is connected to a sliding member, which includes a slider 21 and a slide rail 22. The slide rail 22 is connected to the mounting bracket 20, and the slider 21 is mounted on the slide rail 22. The slider 21 is connected to a mounting block 23. The telescopic end of the telescopic drive member 9 is connected to the mounting block 23. One end of the drive rod 10 is connected to the mounting block 23, and the other end of the drive rod 10 extends toward the push-pull bushing 8.

[0042] The linear guiding structure of slider 21 and slide rail 22 ensures that the extension and retraction of drive rod 10 proceeds smoothly along the fixed axis, reducing frictional resistance and lateral sway, ensuring uniform force on push-pull bushing 8, and improving the smoothness and repeatability of the extension and retraction of needle coil 62.

[0043] Reference Figure 5In this embodiment, the stop block 12 is connected to the drive rod 10 via a mounting part, and five ejector rollers 13 are provided, which are evenly distributed along the stop block 12. The stop block 12 extends along the arc rotation direction of the center line seat and is arranged in a semi-circular arc shape.

[0044] Multiple ejector rollers 13 are evenly distributed along the arc of the stop block 12, which can continuously provide ejector force to the push-pull bushing 8 during the rotation of the rotary disk 5. Thus, the winding needle 62 can be ejected simultaneously when the rotary disk 5 is rotated. Compared with the existing technology that requires waiting for the ejection before rotation, the ejection process of the winding needle 62 in this solution is seamlessly connected with the rotation action, which greatly saves waiting time, enhances the stability of linkage control, and thus improves the production efficiency of winding.

[0045] Two drive rollers 11 are provided, and the two drive rollers 11 are mounted on the drive rod 10. A push-pull part 24 is formed on the push-pull bushing 8, and a gap is formed between the two drive rollers 11 for matching the push-pull part 24.

[0046] The dual drive rollers 11 symmetrically clamp the push-pull part 24 of the push-pull bushing 8, so that when the winding needle 62 completes the winding of the battery cell, the push-pull part 24 can be pulled out by the two drive rollers 11 clamping it, ensuring that the pulling is transmitted to the inner sliding shaft 61 and improving the reliability of the winding needle 62's pulling action.

[0047] In this embodiment, the reel mechanism 6 is provided in two sets, and the two sets of reel mechanisms 6 are arranged opposite to each other. The telescopic drive member 9 is paired with the reel mechanism 6.

[0048] The specific action process in this embodiment is as follows:

[0049] The rotating disk 5 rotates under the drive of the drive motor, so that the positioning groove of the positioning block 15 rotates to be opposite to the telescopic end of the positioning cylinder 16. The positioning cylinder 16 drives the sliding block 17 to drive the clamping member 18 to clamp with the positioning groove of the positioning block 15. At this time, the winding needle 62 on the winding mechanism 6 is in the ejected state. Specifically, the ejection of the telescopic drive member 9 causes the drive roller 11 on the drive rod 10 to apply a pushing force to the push-pull bushing 8. The push-pull bushing 8 drives the winding needle 62 to be exposed outside the center seat 4 through the inner sliding shaft 61. When the winding mechanism 6 drives the winding needle 62 to complete the winding of the battery cell under the drive of the winding drive member;

[0050] The winding needle 62 needs to be pulled out from the finished battery cell. The push-pull part 24 of the push-pull bushing 8 is located between the two drive rollers 11. The retraction of the telescopic drive member 9 causes the push-pull bushing 8 to drive the inner sliding shaft 61 to retract, thereby pulling the winding needle 62 out of the battery cell. It is then used in conjunction with the external unloading mechanism to unload the finished product. The rotating disk 5 drives the center seat 4 to rotate the entire winding mechanism 6. Under the rotation of the center seat 4, the inner sliding shaft 61 can rotate along the ejector roller 13 on the stop block 12 through the push-pull bushing 8. In conjunction with the telescopic drive member 9, the drive rod 10 and the stop block 12 are controlled to eject, so that the ejector roller 13 on the stop block 12 applies a pushing force to the push-pull bushing 8 simultaneously. This allows the winding mechanism 6 to rotate and eject the winding needle 62 at the same time. Through the linkage of rotation and ejection, the winding needle 62 is already in the ejected state when it rotates to the next station. There is no need to wait for ejection after unloading before performing the rotation action, saving action connection time and improving winding production efficiency.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A lithium battery winding needle ejection device, comprising a support frame, a bearing mounting seat connected to the support frame via a vertical plate, a central seat coaxially connected within the bearing mounting seat, and a rotatable winding mechanism disposed inside the central seat, characterized in that: The bottom end of the center seat is connected to a rotating disk. The rotating mechanism can drive the rotating disk to rotate the center seat. The winding mechanism includes an inner sliding shaft, a winding needle, and an outer rotating shaft. The winding needle is installed at one end of the inner sliding shaft. The inner sliding shaft passes through the outer rotating shaft and can drive the winding needle to extend and retract along the axial direction. One end of the inner sliding shaft passes through the rotating disk and is connected to a push-pull bushing. The side of the support frame is connected to a telescopic drive member through a support member. The telescopic end of the telescopic drive member extends toward the winding mechanism and is connected to a drive rod. The end of the drive rod is connected to a drive roller for driving the push-pull bushing to extend and retract the inner sliding shaft. The end of the drive rod near the push-pull bushing is connected to a stop block. The stop block is arranged and extends along the rotation path of the center seat, and an ejector roller is arranged on the stop block. When the needle winding is completed, the retraction of the telescopic drive causes the drive roller to drive the thrust bushing to retract, and the needle retracts into the outer rotating shaft. When the rotating disk drives the center seat to rotate, the winding mechanism rotates synchronously, so that the inner sliding shaft can rotate along the ejector rollers arranged on the stop block through the push-pull bushing and be ejected synchronously through the telescopic drive.

2. The lithium battery winding needle ejection device according to claim 1, characterized in that: The rotating mechanism includes a support base, a rotary motor, and a drive gear. The support base is installed on the side of the support frame, the rotary motor is installed on the support base, and the telescopic end of the rotary motor is coaxially connected to the drive gear. The outer periphery of the rotating disk is provided with helical teeth that mesh with the drive gear, so that the rotary motor can drive the rotating disk to rotate the central seat.

3. The lithium battery coil ejector device according to claim 2, characterized in that: A positioning block is connected to the rotating disk, and a positioning cylinder is connected to the upright plate. The telescopic end of the positioning cylinder extends toward the rotating disk, and the telescopic end of the positioning cylinder is connected to a clamping member for clamping the positioning block through a sliding block.

4. The lithium battery winding needle ejection device according to claim 1, characterized in that: The support includes a support plate and a mounting bracket disposed on the support plate. The support plate is connected to the side of the support frame, the mounting bracket is connected to the support plate, the telescopic drive is connected to the mounting bracket, and the telescopic end of the telescopic drive extends through the push-pull bushing.

5. The lithium battery winding needle ejection device according to claim 4, characterized in that: The mounting bracket is connected to a sliding component, which includes a slider and a slide rail. The slide rail is connected to the mounting bracket, and the slider is mounted on the slide rail. A mounting block is connected to the slider. The telescopic end of the telescopic drive component is connected to the mounting block. One end of the drive rod is connected to the mounting block, and the other end of the drive rod extends toward the push-pull bushing.

6. A lithium battery coil ejector according to any one of claims 1-5, characterized in that: The stop block is connected to the drive rod via the mounting part, and multiple ejector rollers are provided, which are evenly distributed along the stop block.

7. A lithium battery needle ejection device according to any one of claims 1-5, characterized in that: There are two drive rollers, which are mounted on the drive rod. A push-pull part is formed on the push-pull bushing, and a gap is formed between the two drive rollers for matching the push-pull part.

8. The lithium battery winding needle ejection device according to claim 7, characterized in that: The reel mechanism is provided in two sets, which are arranged opposite to each other, and the telescopic drive component is paired with the reel mechanism.

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