Pole piece flattening device

Abstract

The utility model belongs to the technical field of battery manufacturing, and particularly provides a pole piece flattening device. The device is connected with a wind-up roller; a transmission mechanism is arranged near one end of a winding roller; the telescopic assembly comprises a telescopic rod and a rotating part connected to the tail end of the telescopic rod, and the telescopic rod is in linkage with the winding roller through a transmission mechanism. The flattening assembly is assembled on the telescopic assembly and comprises a flattening plate; the rotating part pushes the flattening plate to flatten the pole piece in a reciprocating manner in the process of rotating along with the telescopic rod; according to the pole piece flattening device, power is provided for the telescopic assembly through the winding roller, the flattening assembly is pushed by the rotating part in the telescopic assembly to do reciprocating motion in the length direction of the flattening assembly, an additional driving mechanism does not need to be added to the pole piece flattening device, and meanwhile the problem that a pole piece wrinkles in the winding process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery manufacturing, and specifically relates to a pole piece smoothing device. Background Art

[0002] In the electrode coating and rolling process, the electrode becomes wrinkled during the winding process due to factors such as drying, insufficient tension and poor parallelism. Even after the corresponding machine is debugged, the wrinkling phenomenon still exists. The wrinkling of the electrode has a significant impact on the subsequent processes and even the performance of the finished battery cells.

[0003] Existing measures to solve the problem of electrode wrinkling include debugging the corresponding machine, installing a smoothing roller at the end, etc. The aforementioned measures not only fail to fundamentally solve the problem of electrode wrinkling during winding, but also install too many pressure rollers on the corresponding machine, which leads to the complexity of the corresponding machine structure and requires other driving mechanisms (for example, driving electrodes) to provide power for the pressure rollers, further increasing the complexity of the machine.

[0004] Based on this, it is urgent to invent a pole piece smoothing device to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to solve the power source problem of the pole piece smoothing device while avoiding increasing the complexity of the machine. In view of the above problem, a pole piece smoothing device is provided.

[0006] The technical solution of the utility model to solve the above technical problems is to provide a pole piece smoothing device connected to the winding roller; including:

[0007] A transmission mechanism is arranged near one end of the winding roller;

[0008] A telescopic assembly, comprising a telescopic rod and a rotating part connected to the end of the telescopic rod, wherein the telescopic rod is connected to the winding roller through the transmission mechanism;

[0009] a smoothing assembly, assembled to the telescopic assembly and comprising a smoothing plate;

[0010] The rotating part pushes the smoothing plate to smooth the pole piece while following the rotation of the telescopic rod.

[0011] Specifically, the telescopic assembly also includes a mounting box having a receiving cavity;

[0012] The smoothing assembly also includes a follower for the smoothing plate to be mounted on. The follower and the telescopic rod are both inserted into the receiving cavity and penetrate the installation box. The follower drives the smoothing plate to reciprocate along its own length direction under the push of the rotating part.

[0013] More specifically, the rotating part is provided with at least two stoppers which are arranged at intervals along the circumference of the rotating part;

[0014] Each of the limiting members pushes the driven member to reciprocate a preset distance during the rotation of the rotating part until part of the smoothing assembly is pressed against the adjacent limiting member.

[0015] More specifically, the number of the limiting members is three, and the three limiting members are evenly spaced and distributed.

[0016] Specifically, the smoothing assembly further includes a first blocking portion and a second blocking portion, both of which are located beside the telescopic rod and are respectively installed on the follower at intervals;

[0017] After the rotating part pushes the first blocking part to move a preset distance in a direction close to the telescopic rod and stops the second blocking part, the rotating part pushes the second blocking part to move a preset distance in a direction away from the telescopic rod and stops the first blocking part during the rotation process.

[0018] More specifically, the smoothing assembly further comprises a support rod, one end of which is fixed to the follower, and the other end of which is hinged to the smoothing plate.

[0019] More specifically, the number of the stroking plates is two, and the number of the support rods matches the number of the stroking plates.

[0020] Preferably, the smoothing plate is made of a flexible material that prevents the pole piece from being damaged.

[0021] In a specific embodiment, the telescopic assembly and the winding roller are on the same vertical plane, and the axial direction of the telescopic rod is perpendicular to the axial direction of the winding roller.

[0022] In a specific embodiment, the telescopic component is configured to be telescopic along the thickness direction of the pole piece and to adjust the distance between the smoothing component and the pole piece during the telescopic process.

[0023] The beneficial effect of the utility model is that the telescopic component is powered by the winding roller, and the smoothing component is pushed to reciprocate along the length direction of the smoothing component via the rotating part in the telescopic component. Not only does it not need to add an additional driving mechanism to the pole piece smoothing device, but it also solves the problem of wrinkling of the pole piece during the winding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the implementation modes of the present invention, the following briefly introduces the drawings required for use in the description of the implementation modes. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of the pole piece smoothing device of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the cooperation between the telescopic component and the smoothing component in the pole piece smoothing device of the utility model.

[0027] Reference numerals:

[0028] 1-Pole smoothing device;

[0029] 10-transmission mechanism; 11-telescopic assembly; 110-telescopic rod; 1100-rotating part; 1100a-limiting member; 111-installation box;

[0030] 12-smoothing assembly; 120-driven member; 121-blocking structure; 1210-first blocking part; 1211-second blocking part; 122-support rod; 123-smoothing plate; 13-winding roller; 14-rolled pole piece. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] refer to Figure 1 The utility model provides a pole piece smoothing device 1, which is connected to a winding roller 13 to provide power through the winding roller 13, without the need to add other driving mechanisms. The pole piece smoothing device 1 includes a transmission mechanism 10, a telescopic component 11 and a smoothing component 12, and the telescopic component 11 receives the driving force through the transmission mechanism 10 to rotate and drive the smoothing component 12 to reciprocate to smooth the pole piece (the telescopic component 11 also receives the driving force through the transmission mechanism 10 and telescopes along its own length direction, refer to the following for details).

[0033] In order to avoid affecting the winding of the pole piece by the winding roller 13, the transmission mechanism 10 is arranged near one end of the winding roller 13. In this specific embodiment, the transmission mechanism 10 can be a linkage gear. Of course, in other specific embodiments, the transmission mechanism 10 can be other structures that can realize the linkage between the winding roller 13 and the telescopic assembly 11.

[0034] The telescopic assembly 11 includes an installation box 111 , a telescopic rod 110 installed in the installation box 111 , and a rotating part 1100 connected to the telescopic rod 110 . When the telescopic rod 110 rotates following the winding roller 13 , the rotating part 1100 moves synchronously in the installation box 111 .

[0035] The installation box 111 is used to support the telescopic component 11 and the smoothing component 12. It is placed on a plane and has a receiving cavity to accommodate the telescopic component 11 and the smoothing component 12. For example, the installation box 111 can be placed on the ground or any plane in the use scene. In this specific embodiment, the shape of the installation box 111 can be a cube. Of course, in other specific embodiments, the installation box 111 can also be other shapes.

[0036] The telescopic rod 110 is inserted into the receiving cavity and penetrates the installation box 111 in the vertical direction, and is linked with the winding roller 13 through the transmission mechanism 10, so as to realize the rotation of the telescopic rod 110 and the telescopic rod 110 in the length direction of the telescopic rod 110 itself. Specifically, the telescopic rod 110 rotates synchronously with the winding roller 13, and the rotation direction of the telescopic rod 110 is opposite to the rotation direction of the winding roller 13. That is, when the rotation direction of the winding roller 13 is clockwise, the rotation direction of the telescopic rod 110 is counterclockwise; and vice versa. In this specific embodiment, the rotation direction of the winding roller 13 is clockwise. In order to enable the smoothing component 12 to continuously contact or even adhere to the rolled pole piece 14 as the thickness of the pole piece increases for subsequent smoothing, the telescopic rod 110 can be extended and retracted along the thickness direction of the rolled pole piece 14 and adjust the distance between the smoothing component 12 and the rolled pole piece 14 during the extension and retraction process. In other words, the smoothing component 12 continuously smoothes the pole piece during the winding process of the pole piece.

[0037] The rotating part 1100 is connected to the telescopic rod 110 (specifically, the rotating part 1100 is located near an end of the telescopic rod 110 that is away from the winding roller 13 and is located in the accommodating cavity of the installation box 111). Obviously, the rotating part 1100 faces a side of the installation box 111. During the rotation of the telescopic rod 110, the rotating part 1100 follows the rotation of the telescopic rod 110 to drive the smoothing assembly 12 to reciprocate. Specifically, the rotating part 1100 can be a rotating plate with a certain thickness. Of course, in other specific embodiments, the structure of the rotating part 1100 is not limited.

[0038] The smoothing assembly 12 includes a follower 120 assembled into the installation box 111 and a blocking structure 121 and a smoothing plate 122 placed on the follower 120. The blocking structure 121 drives the follower 120 to move under the push of the rotating part 1100, and moves a preset distance under the restriction of the blocking structure 121 (see below for details), so that the smoothing plate 122 follows the movement of the follower 120 and reciprocates to smooth the pole piece.

[0039] The follower 120 is also inserted into the receiving cavity and penetrates the installation box 111 in the horizontal direction, so that the follower 120 can reciprocate a preset distance along the length direction under the push of the rotating part 1100. Specifically, the length direction of the follower 120 is perpendicular to the axial direction of the telescopic rod 110, and the follower 120, the telescopic rod 110 and the winding roller 13 are in the same vertical plane. Specifically, the follower 120 can be a cross bar with a square vertical cross section. Of course, in other specific embodiments, the follower 120 can also be other structures.

[0040] refer to Figure 2 The blocking structure 121 is assembled on the follower 120, and the blocking structure 121 is located in the receiving cavity and is arranged near the telescopic rod 110, so that the rotating part 1100 pushes or stops the blocking structure 121 to realize the reciprocating motion of the follower 120 for a preset distance. In order to realize the above process, the blocking structure 121 includes two blocking parts arranged at intervals. For the convenience of subsequent understanding and description, the two blocking parts are named as the first blocking part 1210 and the second blocking part 1211 respectively. The rotating part 1100 pushes the first blocking part 1210 to move a preset distance in the direction close to the telescopic rod 110 and stops the second blocking part 1211. After that, the rotating part 1100 pushes the second blocking part 1211 to move a preset distance in the direction away from the telescopic rod 1100 and stops the first blocking part 1210 during the rotation process, thereby realizing the reciprocating motion of the follower 120 for a preset distance. Of course, in other specific embodiments, the number of blocking parts can also be other numbers.

[0041] Specifically, in this embodiment, the first blocking portion 1210 may be a vertical rod, and the second blocking portion 1211 may be a structure with an inclined "V" shape in vertical cross section. Of course, in other embodiments, the structures of the first blocking portion 1210 and the second blocking portion 1211 are not limited.

[0042] Correspondingly, at least two limit members 1100a are arranged on the rotating part 1100 at intervals along the circumference of the rotating part 1100. During the rotation of the rotating part 1100, each limit member 1100a pushes the first blocking part 1210 to move in a direction close to the telescopic rod 110, and follows the movement of the first blocking part 1210 through the follower 120 until the adjacent limit member 1100a is pressed against the second blocking part 1211, thereby enabling the follower 120 to follow the blocking structure 121 to move a preset distance through the limit member 1100a on the rotating part 1100. Afterwards, the adjacent limiting member 1100a squeezes the second blocking portion 1211 during the rotation of the following rotating portion 1100, causing the second blocking portion 1211 to move in a direction away from the transmission mechanism 10, and stops the next limiting member 1100a via the first blocking portion 1210, thereby enabling the follower 120 to follow the blocking structure 121 to reciprocate for a preset distance, and then enabling the follower 120 to drive the smoothing plate 123 to reciprocate and smooth the pole piece. Specifically, in this specific embodiment, the number of limiting members 1100a is three, and the three limiting members 1100a are evenly and spacedly arranged along the circumference of the rotating portion 1100. It should be noted that the aforementioned preset distance value corresponds to or matches the arc value between adjacent limiting members 1100a.

[0043] In one specific embodiment, in order to improve the smoothing efficiency of the electrode smoothing device 1, the shape of the smoothing plate 123 can be a rectangular plate to increase the contact area between the smoothing plate 123 and the electrode. Of course, in other specific embodiments, the shape of the smoothing plate 123 is not limited.

[0044] In a specific embodiment, since the thickness of the smoothing plate 122123 is limited (cost saving), in order to make the smoothing plate 123 contact or even fit to the pole piece (or the rolled pole piece, the pole piece smoothing device 1 of the utility model is used to continuously smooth the pole piece during the whole process of winding the pole piece by the winding roller 13), the smoothing assembly 12 also includes a support rod 122, one end of the support rod 122 is fixed to the follower 120, so as to achieve the fixed connection of the support rod 122; the other end is hinged to the smoothing plate 123 to adjust the angle between the surface of the smoothing plate 123 and the area to be smoothed of the pole piece, so as to improve the smoothing effect of the smoothing plate 123 on the pole piece. Specifically, the support rod 122 and the smoothing plate 123 are connected by a pivot joint or a ball hinge. Of course, in other specific embodiments, the support rod 122 can also be omitted, and it is only necessary to integrate the smoothing plate 123 with the structure with a supporting function.

[0045] More specifically, in order to prevent the smoothing plate 123 from damaging the electrode during the smoothing process, the smoothing plate 123 is made of a flexible material that prevents the electrode from being damaged. Specifically, the material of the smoothing plate 123 can be one or more selected from polyvinyl alcohol (PVA), polyester (PET), polyimide (PI), polyethylene naphthalate (PEN) and textile materials. Of course, in other specific embodiments, the material of the smoothing plate 123 is not limited.

[0046] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A pole piece smoothing device, characterized in that: Connected with the winding roller; including: A transmission mechanism is arranged near one end of the winding roller; A telescopic assembly, comprising a telescopic rod and a rotating part connected to the end of the telescopic rod, wherein the telescopic rod is connected to the winding roller through the transmission mechanism; a smoothing assembly, assembled to the telescopic assembly and comprising a smoothing plate; The rotating part pushes the smoothing plate to smooth the pole piece while following the rotation of the telescopic rod.

2. The pole piece smoothing device according to claim 1, characterized in that: The telescopic assembly also includes a mounting box having a receiving cavity; The smoothing assembly also includes a follower for the smoothing plate to be mounted on. The follower and the telescopic rod are both inserted into the receiving cavity and penetrate the installation box. The follower drives the smoothing plate to reciprocate along its own length direction under the push of the rotating part.

3. The pole piece smoothing device according to claim 2, characterized in that: The rotating part is provided with at least two stoppers which are arranged at intervals along the circumference of the rotating part; Each of the limiting members pushes the driven member to reciprocate a preset distance during the rotation of the rotating part until part of the smoothing assembly is pressed against the adjacent limiting member.

4. The pole piece smoothing device according to claim 3, characterized in that: The number of the limiting members is three, and the three limiting members are evenly spaced and distributed.

5. The pole piece smoothing device according to claim 2, characterized in that: The smoothing assembly further includes a first blocking portion and a second blocking portion, both of which are accommodated in the receiving cavity and are respectively installed on the follower at intervals; After the rotating part pushes the first blocking part to move a preset distance in a direction close to the telescopic rod and stops the second blocking part, the rotating part pushes the second blocking part to move a preset distance in a direction away from the telescopic rod and stops the first blocking part during the rotation process.

6. The pole piece smoothing device according to claim 2, characterized in that: The smoothing assembly also includes a support rod, one end of which is fixed to the follower, and the other end of which is hinged to the smoothing plate.

7. The pole piece smoothing device according to claim 6, characterized in that: The number of the comforting plates is two, and the number of the support rods matches the number of the comforting plates.

8. The pole piece smoothing device according to claim 5, characterized in that: The smoothing plate is made of a flexible material to prevent the pole piece from being damaged.

9. The pole piece smoothing device according to claim 1, characterized in that: The telescopic assembly and the winding roller are on the same vertical plane, and the axial direction of the telescopic rod is perpendicular to the axial direction of the winding roller.

10. The pole piece smoothing device according to any one of claims 1 to 9, characterized in that: The telescopic component is configured to be telescopic along the thickness direction of the pole piece and to adjust the distance between the smoothing component and the pole piece during the telescopic process.

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