A roller mechanism, a pole piece driving device and a battery cell winding device

Abstract

The utility model relates to the technical field of lithium battery processing equipment, and in particular to a roller mechanism, a pole piece driving device and a battery cell winding device. The roller mechanism provided by the utility model includes: a mounting seat, a roller assembly and a pressure plate; a mounting cavity and a pair of card slots are provided on one side of the mounting seat, the roller assembly is provided in the mounting cavity, and the two ends of the roller assembly are respectively connected to the card slots; the pressure plate is rotatably connected to the mounting seat and is located at the notch of the card slot, and the pressure plate can open or close the notch of the card slot by rotating. When the roller assembly needs to be disassembled and replaced, the roller assembly can be taken out of the card slot by simply rotating the pressure plate to open the notch of the card slot, which is convenient for replacement.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery processing equipment, in particular to a pressing roller mechanism, a pole piece driving device and a battery core winding device. Background Art

[0002] As a new type of secondary battery, lithium-ion battery has the advantages of high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and green environmental protection. It has broad application prospects in portable appliances, power tools, large-scale energy storage, electric transportation power supply, etc.

[0003] During the production process, winding equipment is required to wind the pole piece and the diaphragm into a battery cell. In the initial winding step, the winding needle pre-winds a certain number of layers of the inner and outer diaphragms, and then the pole piece drive device of the winding equipment sends the pole piece to the winding needle, and finally the pole piece and the diaphragm are wound together by the winding needle to form a wound battery cell.

[0004] At present, the pole piece driving device has a driving roller and a pressure roller, and the pressure roller is a rubber-coated part that is a wearing part and needs to be replaced frequently. Since the shafts of the driving roller and the pressure roller are both installed on the fixed frame through bearings, it is inconvenient to install, disassemble and replace the pressure roller. Utility Model Content

[0005] The utility model aims to provide a pressing roller mechanism, a pole piece driving device and a battery core winding device to solve the technical problem of inconvenient installation, disassembly and replacement of the existing pressing roller.

[0006] The utility model provides a pressing roller mechanism, comprising: a mounting seat, a pressing roller assembly and a pressing plate;

[0007] A mounting cavity and a pair of clamping grooves are provided on one side of the mounting seat, the pressing roller assembly is provided in the mounting cavity, and two ends of the pressing roller assembly are respectively clamped in the clamping grooves;

[0008] The pressing plate is rotatably connected to the mounting seat and is located at the notch of the card slot. The pressing plate can open or close the notch of the card slot by rotating.

[0009] As a further technical solution, the pressure roller assembly includes a first connecting shaft, a pressure roller body and an axial positioning structure;

[0010] The first connecting shaft is disposed in the installation cavity, and two ends of the first connecting shaft are respectively clamped in the clamping grooves;

[0011] The pressing roller body is sleeved on the first connecting shaft and can rotate relative to the first connecting shaft;

[0012] The axial positioning structure is arranged on the first connecting shaft, and the axial positioning structure is used to fix the axial position of the pressure roller body.

[0013] As a further technical solution, it further comprises a second connecting shaft, one end of the pressing plate is provided with a first connecting hole, and the mounting seat is provided with a second connecting hole;

[0014] One end of the second connecting shaft is connected to the first connecting hole, and the other end is connected to the second connecting hole, and the pressing plate can rotate relative to the mounting seat through the second connecting shaft.

[0015] As a further technical solution, the mounting base includes a first base body and a second base body, and the second base body is arranged on one side of the first base body;

[0016] The first base body is provided with a groove, the second base body is provided with a first notch corresponding to the groove, and the groove and the first notch form the installation cavity;

[0017] The two ends of the second base body on the side away from the first base body are provided with the clamping grooves, and the pressing plate is rotatably connected to the two ends of the second base body on the side away from the first base body.

[0018] As a further technical solution, the axial positioning structure includes a first bearing retaining ring and a second bearing retaining ring, and both ends of the pressure roller body are connected to the first connecting shaft through a first bearing;

[0019] The first bearing retaining ring and the second bearing retaining ring are both sleeved on the first connecting shaft and are respectively located at two ends of the pressure roller body and axially abut against the first bearing.

[0020] The utility model provides a pole piece driving device, comprising a driving roller assembly, a driving mechanism and the pressing roller mechanism;

[0021] The driving mechanism is used to drive the driving roller assembly to rotate, and a pole piece driving gap is arranged between the driving roller assembly and the pressure roller assembly.

[0022] As a further technical solution, it further comprises an adjustment seat, a first connecting member and a second connecting member, and the adjustment seat is arranged on a side of the mounting seat away from the pressure roller assembly;

[0023] A support bearing is also provided on the mounting seat, one end of the third connecting shaft is transmission-connected to the output end of the driving mechanism, and the other end is plugged into the support bearing;

[0024] A connecting waist hole, a second notch and a third notch are provided on the side of the adjustment seat away from the mounting seat, a positioning pin is provided on the driving mechanism, one end of the first connecting member passes through the connecting waist hole and is connected to the mounting seat, one end of the second connecting member passes through the second notch and is connected to the driving mechanism, and the positioning pin is located in the third notch.

[0025] As a further technical solution, it also includes an adjusting member, which is connected to the mounting seat and is used to adjust the angle between the adjusting seat and the mounting seat.

[0026] As a further technical solution, the driving roller assembly includes a driving roller body, a third connecting shaft and a one-way bearing. The driving roller body is sleeved on the third connecting shaft. The one-way bearing is arranged on the third connecting shaft and is located inside the driving roller body and connected to the driving roller body.

[0027] The utility model provides a battery core winding device, which comprises the pole piece driving device.

[0028] Compared with the prior art, the technical advantages of the roller mechanism, pole piece driving device and battery cell winding equipment provided by the utility model are as follows:

[0029] The pressure roller mechanism provided by the utility model comprises: a mounting seat, a pressure roller assembly and a pressure plate; a mounting cavity and a pair of clamping grooves are arranged on one side of the mounting seat, the pressure roller assembly is arranged in the mounting cavity, and the two ends of the pressure roller assembly are respectively clamped in the clamping grooves; the pressure plate is rotatably connected to the mounting seat and is located at the notch of the clamping groove, and the pressure plate can open or close the notch of the clamping groove by rotating.

[0030] The two ends of the pressure roller assembly are respectively stuck in the slots, so that the pressure roller assembly is located in the installation cavity to avoid external influences. At the same time, the pressure plate located at the notch of the slot can press the end of the pressure roller assembly in the slot to ensure the stability of the pressure roller assembly. When the pressure roller assembly needs to be disassembled and replaced, the pressure roller assembly can be taken out of the slot by simply rotating the pressure plate to open the notch of the slot, which is convenient for replacement.

[0031] The pole piece driving device provided by the utility model includes the above-mentioned pressing roller mechanism, and thus the technical advantages and effects achieved by it include the technical advantages and effects achieved by the above-mentioned pressing roller mechanism, which will not be elaborated in detail here.

[0032] The battery cell winding device provided by the utility model includes the above-mentioned pole piece driving device, and thus the technical advantages and effects achieved by it include the technical advantages and effects achieved by the above-mentioned pole piece driving device, which will not be elaborated in detail here.

[0033] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the structure of one side of a pole piece driving device provided in an embodiment of the utility model;

[0036] Figure 2 A schematic diagram of the structure of the other side of the pole piece driving device provided in an embodiment of the utility model;

[0037] Figure 3 A cross-sectional view of a pole piece driving device provided in an embodiment of the utility model;

[0038] Figure 4 Schematic diagram of a battery cell winding device provided in an embodiment of the utility model.

[0039] Icons: 1-mounting seat; 2-first connecting shaft; 3-pressure roller body; 4-pressure plate; 5-slot; 6-second connecting shaft; 7-first seat body; 8-second seat body; 9-groove; 10-first notch; 11-first bearing retaining ring; 12-second bearing retaining ring; 13-first bearing; 14-driving roller body; 15-adjusting seat; 16-first connecting piece; 17-second connecting piece; 18-third connecting shaft; 19-second bearing; 20-third bearing retaining ring; 21-fourth bearing retaining ring; 22-motor; 23-motor seat; 24-connecting waist hole; 25-second notch; 26-third notch; 27-locating pin; 28-adjusting piece; 29-one-way bearing; 30-support bearing; 31-winding needle; 32-upper diaphragm roller; 33-film roller; 34-positive electrode sheet; 35-negative electrode sheet; 36-upper diaphragm; 37-lower diaphragm. DETAILED DESCRIPTION

[0040] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0044] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0045] Specific structure such as Figures 1 to 4 shown.

[0046] The present embodiment provides a pressure roller mechanism, comprising: a mounting seat 1, a pressure roller assembly and a pressure plate 4; a mounting cavity and a pair of clamping grooves 5 are provided on one side of the mounting seat 1, the pressure roller assembly is provided in the mounting cavity, and the two ends of the pressure roller assembly are respectively clamped in the clamping grooves 5; the pressure plate 4 is rotatably connected to the mounting seat 1 and is located at the notch of the clamping groove 5, and the pressure plate 4 can open or close the notch of the clamping groove 5 by rotating.

[0047] In this embodiment, the two ends of the pressure roller assembly are respectively clamped in the slot 5, so that the pressure roller assembly is located in the installation cavity to avoid external influences. At the same time, the pressure plate 4 located at the notch of the slot 5 can press the end of the pressure roller assembly in the slot 5 to ensure the stability of the pressure roller assembly. When the pressure roller assembly needs to be disassembled and replaced, it is only necessary to rotate the pressure plate 4 to open the notch of the slot 5 to take the pressure roller assembly out of the slot 5 for easy replacement.

[0048] In this embodiment, the pressure roller body 3 is rotatably mounted on the first connecting shaft 2 and is positioned by an axial positioning structure to ensure stability and a simple structure. The two ends of the first connecting shaft 2 are respectively clamped in the slot 5, so that the pressure roller body 3 is located in the installation cavity to prevent external influences on the rotation of the pressure roller body 3. At the same time, the pressure plate 4 located at the notch of the slot 5 can press the end of the first connecting shaft 2 in the slot 5 to ensure the stability of the first connecting shaft 2. When the pressure roller body 3 needs to be disassembled and replaced, it is only necessary to rotate the pressure plate 4 to open the notch of the slot 5 to remove the first connecting shaft 2 from the slot 5 for easy replacement.

[0049] In the optional technical solution of this embodiment, the pressure roller assembly includes: a first connecting shaft 2, a pressure roller body 3 and an axial positioning structure; the first connecting shaft 2 is arranged in the installation cavity, and the two ends of the first connecting shaft 2 are respectively clamped in the clamping groove 5; the pressure roller body 3 is sleeved on the first connecting shaft 2 and can rotate relative to the first connecting shaft 2; the axial positioning structure is arranged on the first connecting shaft 2, and the axial positioning structure is used to fix the axial position of the pressure roller body 3.

[0050] In this embodiment, the pressure roller body 3 is rotatably mounted on the first connecting shaft 2 and is positioned by an axial positioning structure to ensure stability and a simple structure. The two ends of the first connecting shaft 2 are respectively clamped in the slot 5, so that the pressure roller body 3 is located in the installation cavity to prevent external influences on the rotation of the pressure roller body 3. At the same time, the pressure plate 4 located at the notch of the slot 5 can press the end of the first connecting shaft 2 in the slot 5 to ensure the stability of the first connecting shaft 2. When the pressure roller body 3 needs to be disassembled and replaced, it is only necessary to rotate the pressure plate 4 to open the notch of the slot 5 to remove the first connecting shaft 2 from the slot 5 for easy replacement.

[0051] The optional technical solution of this embodiment further includes a second connecting shaft 6, a first connecting hole is provided at one end of the pressing plate 4, and a second connecting hole is provided on the mounting seat 1; one end of the second connecting shaft 6 is connected to the first connecting hole, and the other end is connected to the second connecting hole, and the pressing plate 4 can rotate relative to the mounting seat 1 through the second connecting shaft 6. In this way, the pressing plate 4 can rotate left and right relative to the opening of the card slot 5, so that the pressing plate 4 can better press the first connecting shaft 2 into the card slot 5.

[0052] However, the present invention is not limited thereto. Alternatively, the pressing plate 4 may be connected to the mounting seat 1 via a rotating shaft, a hinge shaft or a hinge, so that the pressing plate 4 can rotate up and down relative to the opening of the slot 5 .

[0053] In the optional technical solution of this embodiment, the mounting seat 1 includes a first seat body 7 and a second seat body 8, and the second seat body 8 is arranged on one side of the first seat body 7; a groove 9 is arranged on the first seat body 7, and a first notch 10 corresponding to the groove 9 is arranged on the second seat body 8, and the groove 9 and the first notch 10 form a mounting cavity; the two ends of the second seat body 8 facing away from the first seat body 7 are provided with card grooves 5, and the pressure plate 4 is rotatably connected to the two ends of the second seat body 8 facing away from the first seat body 7.

[0054] In this embodiment, a groove 9 is provided on one side of the first seat body 7 facing the second seat body 8. The second seat body 8 is U-shaped and has an opening to form a first notch 10. The first notch 10 and the groove 9 together form an installation cavity. Both ends of the first connecting shaft 2 are clamped in the clamping grooves 5 at both ends of the second seat body 8, and are pressed tightly in the clamping grooves 5 by the pressure plates 4 at both ends of the second seat body 8. The mounting seat 1 is a split structure, which is convenient for manufacturing, installation and disassembly, and easy for separate maintenance and replacement.

[0055] In the optional technical solution of this embodiment, the axial positioning structure includes a first bearing retaining ring 11 and a second bearing retaining ring 12, and both ends of the pressure roller body 3 are connected to the first connecting shaft 2 through the first bearing 13; the first bearing retaining ring 11 and the second bearing retaining ring 12 are both sleeved on the first connecting shaft 2, and are respectively located at both ends of the pressure roller body 3 and axially abut against the first bearing 13.

[0056] In this embodiment, the roller body 3 is connected to the first connecting shaft 2 through the first bearing 13, so that the roller body 3 can rotate relative to the first connecting shaft 2, and the rotation effect is stable. At the same time, the first bearing retaining ring 11 and the second bearing retaining ring 12 installed on the first connecting shaft 2 are used to axially position the first bearings 13 at both ends of the roller body 3. The structure is simple, the installation is convenient, and the positioning effect is good.

[0057] In this embodiment, the axial positioning structure may also include two locking sleeves arranged on the first connecting shaft 2, and the two locking sleeves are located at both ends of the pressure roller body 3; specifically, the locking sleeves are locking plates, and the two locking plates limit the pressure roller body 3 to a preset axial position of the first connecting shaft 2 to achieve positioning. The locking plates have a simple structure and are easy to operate.

[0058] The present embodiment provides a pole piece driving device, including a driving roller assembly, a driving mechanism and the above-mentioned pressure roller mechanism; the driving mechanism is used to drive the driving roller assembly to rotate, and a pole piece driving gap is arranged between the driving roller assembly and the pressure roller assembly. The pole piece passes through the pole piece driving gap and is clamped by the pressure roller assembly and the driving roller assembly. The driving mechanism drives the driving roller assembly to rotate so that the pole piece is driven to feed. The structure is simple, and the pole piece driving is convenient and stable.

[0059] The optional technical solution of this embodiment also includes an adjustment seat 15, a first connecting member 16 and a second connecting member 17, and the adjustment seat 15 is arranged on the side of the mounting seat 1 away from the pressure roller assembly; the driving roller assembly includes a driving roller body 14, a third connecting shaft 18, a second bearing 19, a third bearing retaining ring 20 and a fourth bearing retaining ring 21, the driving roller body 14 is sleeved on the third connecting shaft 18, both ends of the driving roller body 14 are connected to the third connecting shaft 18 through the second bearing 19, the third bearing retaining ring 20 and the fourth bearing retaining ring 21 are sleeved on the third connecting shaft 18, and are respectively located at the driving roller body 14 and the third connecting shaft 18. Both ends of the movable roller body 14 are axially abutted against the second bearing 19; a support bearing 30 is also provided on the mounting seat 1, one end of the third connecting shaft 18 is transmission-connected to the output end of the driving mechanism, and the other end is plugged into the support bearing 30; a connecting waist hole 24, a second notch 25 and a third notch 26 are provided on the side of the adjustment seat 15 away from the mounting seat 1, a locating pin 27 is provided on the driving mechanism, one end of the first connecting member 16 passes through the connecting waist hole 24 to be connected to the mounting seat 1, one end of the second connecting member 17 passes through the second notch 25 to be connected to the driving mechanism, and the locating pin 27 is located in the third notch 26.

[0060] Specifically, the driving mechanism includes a motor 22 and a motor seat 23. The motor 22 is installed on the motor seat 23. A positioning pin 27 is provided on the motor seat 23. A support bearing 30 is provided on the first seat body 7. The adjustment seat 15 is connected to the side of the first seat body 7 away from the second seat body 8 through the first connecting member 16, and partially extends out. The second notch 25 and the third notch 26 are located at the end of the extended part. The output end of the motor 22 is transmission-connected to one end of the third connecting shaft 18, and the other end of the third connecting shaft 18 is connected to the support bearing 30. The connection method between the driving roller body 14, the third connecting shaft 18, the second bearing 19, the third bearing retaining ring 20 and the fourth bearing retaining ring 21 is the same as that of the pressure roller body 3, which will not be repeated here. The motor seat 23 is positioned with the third notch 26 by the positioning pin 27, and the second connecting member 17 is connected to the motor seat 23 through the second notch 25 to fix the motor seat 23. Among them, through the cooperation of the first connecting member 16 and the waist hole, the position of the adjusting seat 15 can be adjusted, and then the position of the motor seat 23 can be adjusted, so that the gap between the driving roller body 14 and the pressing roller body 3 can be changed, thereby improving adaptability. In addition, when disassembling, only the second connecting member 17 needs to be removed, and the driving mechanism and the third connecting shaft 18 can be pulled out from the side, which is convenient for disassembly and installation. A pole piece driving gap is set between the driving roller body 14 and the pressing roller body 3.

[0061] Preferably, a plurality of second notches 25 and third notches 26 are alternately arranged to improve the stability of the connection and positioning.

[0062] In this embodiment, the first connecting member 16 and the second connecting member 17 are both bolts, but are not limited thereto and may also be other connecting members that can meet the requirements.

[0063] An optional technical solution of this embodiment further includes an adjusting member 28 , which is connected to the mounting seat 1 and is used to adjust the angle between the adjusting seat 15 and the mounting seat 1 .

[0064] Specifically, the adjusting member 28 is arranged on the first seat body 7 and connected to the extended part of the adjusting seat 15. At the same time, the adjusting member 28 is perpendicular to the axial direction of the first connecting shaft 2 and can reciprocate in a direction perpendicular to the axial direction of the first connecting shaft 2. The adjusting member 28 can change the angle between the adjusting seat 15 and the first seat body 7 through movement, thereby changing the angle of the motor seat 23, and then changing the angle of the third connecting shaft 18, so that the first connecting shaft 2 and the third connecting shaft 18 can be parallel. The adjustment is convenient and accurate through the adjusting member 28. Among them, the adjusting member 28 is preferably an adjusting bolt with a simple structure and stable adjustment. However, it is not limited to this, and it can also be other existing adjustment structures as long as it meets the needs.

[0065] In an optional technical solution of this embodiment, the driving roller assembly further includes a one-way bearing 29, which is disposed on the third connecting shaft 18 and is located inside the driving roller body 14 and connected to the driving roller body 14, thereby improving the transmission accuracy and efficiency between the third connecting shaft 18 and the driving roller body 14.

[0066] In the optional technical solution of this embodiment, the structure and size of the driving roller assembly are the same as those of the pressing roller assembly, so that the driving roller assembly and the pressing roller assembly can be used interchangeably, thereby improving applicability. Preferably, the structure and size of the driving roller body 14 and the pressing roller body 3 are the same, so that the driving roller body 14 and the pressing roller body 3 can be used interchangeably, thereby improving applicability.

[0067] The present embodiment provides a battery cell winding device, including the above-mentioned pole piece driving device. Therefore, the technical advantages and effects achieved by the battery cell winding device include the technical advantages and effects achieved by the above-mentioned pole piece driving device, which will not be repeated here.

[0068] Specifically, it includes a winding needle 31, an upper diaphragm roller 32 and a film-joining roller 33. The electrode sheet driving device is provided with two for driving the positive electrode sheet 34 and the negative electrode sheet 35 respectively. The upper diaphragm roller 32 is used to guide the upper diaphragm 36, and the film-joining roller 33 is used to guide the lower diaphragm 37. The positive electrode sheet 34, the upper diaphragm 36, the negative electrode sheet 35 and the lower diaphragm 37 are stacked and wound on the winding needle 31 in sequence.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pressure roller mechanism, characterized in that: include: A mounting seat (1), a pressure roller assembly and a pressure plate (4); A mounting cavity and a pair of clamping grooves (5) are provided on one side of the mounting seat (1); the pressure roller assembly is arranged in the mounting cavity, and two ends of the pressure roller assembly are respectively clamped in the clamping grooves (5); The pressing plate (4) is rotatably connected to the mounting seat (1) and is located at the notch of the card slot (5). The pressing plate (4) can open or close the notch of the card slot (5) by rotating.

2. The pressing roller mechanism according to claim 1, characterized in that: The pressure roller assembly comprises a first connecting shaft (2), a pressure roller body (3) and an axial positioning structure; The first connecting shaft (2) is arranged in the installation cavity, and two ends of the first connecting shaft (2) are respectively clamped in the clamping groove (5); The pressing roller body (3) is sleeved on the first connecting shaft (2) and is capable of rotating relative to the first connecting shaft (2); The axial positioning structure is arranged on the first connecting shaft (2), and the axial positioning structure is used to fix the axial position of the pressure roller body (3).

3. The pressing roller mechanism according to claim 1, characterized in that: It also includes a second connecting shaft (6), one end of the pressing plate (4) is provided with a first connecting hole, and the mounting seat (1) is provided with a second connecting hole; One end of the second connecting shaft (6) is connected to the first connecting hole, and the other end is connected to the second connecting hole, and the pressing plate (4) can rotate relative to the mounting seat (1) via the second connecting shaft (6).

4. The pressing roller mechanism according to claim 1, characterized in that: The mounting seat (1) comprises a first seat body (7) and a second seat body (8), and the second seat body (8) is arranged on one side of the first seat body (7); The first base body (7) is provided with a groove (9), and the second base body (8) is provided with a first notch (10) corresponding to the groove (9), and the groove (9) and the first notch (10) form the installation cavity; The clamping grooves (5) are arranged at two ends of the second seat body (8) on a side away from the first seat body (7), and the pressing plate (4) is rotatably connected to the two ends of the second seat body (8) on a side away from the first seat body (7).

5. The pressing roller mechanism according to claim 2, characterized in that: The axial positioning structure comprises a first bearing retaining ring (11) and a second bearing retaining ring (12), and both ends of the pressure roller body (3) are connected to the first connecting shaft (2) via a first bearing (13); The first bearing retaining ring (11) and the second bearing retaining ring (12) are both sleeved on the first connecting shaft (2), and are respectively located at two ends of the pressure roller body (3) and axially abut against the first bearing (13).

6. A pole piece driving device, characterized in that: It comprises a driving roller assembly, a driving mechanism and a pressing roller mechanism according to any one of claims 1 to 5; The driving mechanism is used to drive the driving roller assembly to rotate, and a pole piece driving gap is arranged between the driving roller assembly and the pressure roller assembly.

7. The pole piece driving device according to claim 6, characterized in that: It also comprises an adjustment seat (15), a first connecting member (16) and a second connecting member (17), wherein the adjustment seat (15) is arranged on a side of the mounting seat (1) away from the pressure roller assembly; A support bearing (30) is also provided on the mounting seat (1); one end of the driving roller assembly is drivingly connected to the output end of the driving mechanism, and the other end is plugged into the support bearing (30); A connecting waist hole (24), a second notch (25) and a third notch (26) are provided on a side of the adjustment seat (15) facing away from the mounting seat (1); a positioning pin (27) is provided on the driving mechanism; one end of the first connecting member (16) passes through the connecting waist hole (24) to be connected to the mounting seat (1); one end of the second connecting member (17) passes through the second notch (25) to be connected to the driving mechanism; and the positioning pin (27) is located in the third notch (26).

8. The pole piece driving device according to claim 7, characterized in that: It also comprises an adjusting member (28), wherein the adjusting member (28) is connected to the mounting seat (1) and is used to adjust the angle between the adjusting seat (15) and the mounting seat (1).

9. The pole piece driving device according to claim 7, characterized in that: The driving roller assembly comprises a driving roller body (14), a third connecting shaft (18) and a one-way bearing (29); the driving roller body (14) is sleeved on the third connecting shaft (18); the one-way bearing (29) is arranged on the third connecting shaft (18) and is located inside the driving roller body (14) and connected to the driving roller body (14).

10. A battery cell winding device, characterized in that: A pole piece driving device comprising the pole piece driving device as described in any one of claims 6 to 9.

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