Auxiliary roller mechanism and compression roller device

Abstract

The utility model belongs to the technical field of batteries, and discloses an auxiliary roller mechanism and a compression roller device. The auxiliary roller mechanism comprises an auxiliary roller and an adjusting assembly; the auxiliary roller is used for abutting against the pole piece; the adjusting assembly is connected with the auxiliary roller, the adjusting assembly comprises at least two connecting rods which are rotationally connected in sequence, the included angle between every two adjacent connecting rods is adjustable, and the adjusting assembly is used for adjusting the position of the auxiliary roller so that the peripheral face of the auxiliary roller can abut against or be separated from the pole piece. In the auxiliary roller mechanism, the position of the auxiliary roller is adjusted by adjusting the posture of the adjusting assembly, so that the auxiliary roller can be in contact with or separated from the pole piece; the auxiliary roller is used for flattening the edge of the pole piece, so that wrinkles, rippled edges and other defects are eliminated; and the adjusting assembly comprises at least two connecting rods, so that the tensioning degree of the auxiliary roller on the pole piece can be adjusted in a larger range, the use is more flexible, and wrinkles can be better eliminated.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an auxiliary roller mechanism and a pressure roller device. Background Technology

[0002] The manufacturing process of lithium-ion power batteries includes a rolling process. Rolling involves coating an active material in slurry form onto a substrate to form an electrode sheet. After drying, the electrode sheet is rolled in a rolling device. The purpose of rolling is to make the electrode sheet surface smooth and burr-free, to compact the active material in the coating, to reduce the electrode sheet volume, to ensure closer contact between the active material and the conductive agent in the coating, to improve conductivity, and to reduce powder shedding.

[0003] Currently, during the rolling process of electrode sheets, the areas on both sides of the electrode sheet that are not coated with slurry are prone to defects such as wrinkles and wavy edges, which cannot be improved or eliminated by adjusting the rolling equipment, thus affecting the quality of the electrode sheet. Utility Model Content

[0004] The purpose of this utility model is to provide an auxiliary roller mechanism and a pressure roller device that can eliminate defects such as wrinkles and wavy edges on both sides of the electrode sheet during the rolling process.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An auxiliary roller mechanism, comprising:

[0007] An auxiliary roller, which is used to abut against the electrode sheet;

[0008] An adjustment assembly is movably connected to the auxiliary roller. The adjustment assembly includes at least two connecting rods that are rotatably connected in sequence. The included angle between two adjacent connecting rods is adjustable. The adjustment assembly is used to adjust the position of the auxiliary roller so that the outer peripheral surface of the auxiliary roller can abut or separate from the electrode sheet.

[0009] As an alternative to the aforementioned auxiliary roller mechanism, two adjacent connecting rods are rotatably connected by a connecting structure, and the connecting structure can lock or unlock the two connecting rods connected to it.

[0010] As an alternative to the above-mentioned auxiliary roller mechanism, the connection structure includes bolts and nuts. Along the axial direction of the auxiliary roller, the bolts pass through two adjacent connecting rods in sequence and are threadedly connected to the nuts.

[0011] As an alternative to the above-mentioned auxiliary roller mechanism, the connecting mechanism includes a rotating shaft and a locking element. Two adjacent connecting rods are rotatably connected through the rotating shaft. One of the two adjacent connecting rods is movably provided with the locking element, and the locking element is detachably connected to the other connecting rod.

[0012] As an alternative to the aforementioned auxiliary roller mechanism, the adjusting assembly includes three connecting rods that are rotatably connected in sequence. The three connecting rods are a first connecting rod, a second connecting rod, and a third connecting rod. One end of the second connecting rod is rotatably connected to the first connecting rod, and the other end of the second connecting rod is rotatably connected to the third connecting rod. The third connecting rod is connected to the auxiliary roller.

[0013] As an alternative to the above-mentioned auxiliary roller mechanism, the auxiliary roller mechanism further includes a fixing member, on which multiple fixing structures are spaced apart along the axial direction of the auxiliary roller, and the adjusting component can be switched to be connected to any of the fixing structures.

[0014] As an alternative to the above-mentioned auxiliary roller mechanism, the outer diameter of the auxiliary rollers is equal along the axial direction;

[0015] Alternatively, the outer diameter of the auxiliary roller gradually decreases axially from the middle to both ends.

[0016] As an alternative to the above-mentioned auxiliary roller mechanism, the auxiliary roller includes:

[0017] A center rod, which is connected to the adjustment assembly;

[0018] An outer roller is rotatably mounted on the central rod and is used to abut against the electrode sheet.

[0019] As an alternative to the above-mentioned auxiliary roller mechanism, a bearing is provided inside the outer roller, and the bearing is sleeved on the central rod;

[0020] And / or, the auxiliary roller further includes retaining rings, with retaining rings sleeved at both axial ends of the central rod, and the outer roller located between the retaining rings on both sides.

[0021] A pressure roller device includes a winding mechanism, an unwinding mechanism, and the aforementioned auxiliary roller mechanism, wherein the auxiliary roller mechanism is disposed between the winding mechanism and the unwinding mechanism.

[0022] The beneficial effects of this utility model are:

[0023] The auxiliary roller mechanism provided by this utility model includes an auxiliary roller and an adjustment assembly. The adjustment assembly includes at least two connecting rods rotatably connected in sequence. The included angle between adjacent connecting rods is adjustable to adjust the posture of the adjustment assembly, thereby adjusting the position of the auxiliary roller so that the auxiliary roller can contact or separate from the electrode sheet. The auxiliary roller is used to flatten the edge of the electrode sheet, thereby eliminating defects such as wrinkles and wavy edges. The adjustment assembly includes at least two connecting rods, allowing the tension of the auxiliary roller on the electrode sheet to be adjusted within a large range, making it more flexible to use and better able to eliminate wrinkles.

[0024] The pressure roller device provided by this utility model adopts the above-mentioned auxiliary roller mechanism, which can eliminate defects such as wrinkles and wavy edges on both sides of the electrode sheet during the rolling process, thereby improving the rolling quality. Attached Figure Description

[0025] Figure 1 This is a first schematic diagram of the roller pressing device provided by this utility model;

[0026] Figure 2 This is a second schematic diagram of the roller pressing device provided by this utility model;

[0027] Figure 3 This is a third schematic diagram of the roller pressing device provided by this utility model;

[0028] Figure 4 This is a schematic diagram of the auxiliary roller mechanism provided by this utility model;

[0029] Figure 5 This is a first schematic diagram of the auxiliary roller provided by this utility model;

[0030] Figure 6 This is a second schematic diagram of the auxiliary roller provided by this utility model.

[0031] In the picture:

[0032] 100. Auxiliary roller mechanism; 110. Auxiliary roller; 111. Center rod; 112. Outer roller; 113. Bearing; 114. Snap ring; 120. Adjustment assembly; 121. Connecting rod; 121a. First connecting rod; 121b. Second connecting rod; 121c. Third connecting rod; 122. Connecting nut; 123. Connecting bolt; 130. Fixing component; 131. Limiting groove; 132. Fixing structure; 1321. Fixing hole; 200. Frame; 300. Unwinding mechanism; 400. Rewinding mechanism; 500. Electrode; 510. Substrate; 520. Coating. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] This embodiment provides a pressure roller device for pressing electrode sheet 500. For example... Figure 1 As shown, the rolling device includes a winding mechanism 400, an unwinding mechanism 300, and a rolling mechanism (not shown in the figure). The rolling mechanism is located between the winding mechanism 400 and the unwinding mechanism 300. The electrode sheet 500 to be rolled is wound in the unwinding mechanism 300, and the electrode sheet 500 is wound in the winding mechanism 400 after passing through the rolling mechanism.

[0038] Optionally, the rolling mechanism includes two pressure rollers arranged opposite each other, forming a channel between the two pressure rollers that allows the electrode 500 to pass through. The pressure rollers can rotate to roll the electrode 500, compact the slurry on the surface of the electrode 500, and make the surface of the electrode 500 smooth.

[0039] Optionally, both the unwinding mechanism 300 and the winding mechanism 400 include rollers for winding the electrode sheet 500. The rollers are rotatably mounted on the frame 200 or at a designated position, and the electrode sheet 500 is wound or unwound by rotating the rollers.

[0040] It should be noted that the winding mechanism 400, the unwinding mechanism 300, and the roller pressing mechanism are all common structures in the field. The specific structures of the pressure rollers and roller shafts, as well as the driving structures that make them rotate, are all existing technologies and will not be described in detail here.

[0041] like Figure 1 As shown, the electrode 500 includes a substrate 510 and a coating 520 coated on the substrate 510. The coating 520 is located in the middle of the substrate 510, and the opposite two side edges of the substrate 510 are exposed. That is, the electrode 500 includes a coated area and empty foil areas located on both sides of the coated area. During the rolling process, the middle part of the substrate 510 (i.e., the coated area) is rolled due to the force of the coating 520, causing the substrate 510 coated with the coating 520 to stretch simultaneously. However, the edges of the substrate 510 not covered by the coating 520 (i.e., the empty foil areas) are not rolled and therefore do not stretch, which can easily lead to defects such as wrinkles and wavy edges, affecting the quality of the electrode 500.

[0042] To address the aforementioned issues, the rolling device in this embodiment further includes an auxiliary roller mechanism 100. The auxiliary roller mechanism 100 is positioned between the winding mechanism 400 and the unwinding mechanism 300. The auxiliary roller mechanism 100 can selectively contact or separate from the electrode sheet 500. Specifically, when the electrode sheet 500 has defects such as wrinkles at its edges, the auxiliary roller mechanism 100 is adjusted to a position where it can contact the electrode sheet 500, thereby rolling or tensioning the electrode sheet 500 to eliminate these defects. When the electrode sheet 500 has flat edges without defects, the auxiliary roller mechanism 100 can be adjusted to a position where it is separated from the electrode sheet 500, preventing contact between the auxiliary roller mechanism 100 and the electrode sheet 500, allowing the electrode sheet 500 to be wound up after rolling.

[0043] like Figures 1-3 As shown, the auxiliary roller mechanism 100 includes an auxiliary roller 110 and an adjustment assembly 120. The adjustment assembly 120 is movably connected to the auxiliary roller 110 and is used to adjust the position of the auxiliary roller 110 so that the outer circumferential surface of the auxiliary roller 110 can abut or separate from the electrode 500. The adjustment assembly 120 includes at least two connecting rods 121 rotatably connected in sequence. The included angle between adjacent connecting rods 121 is adjustable to adjust the posture of the adjustment assembly 120, thereby achieving the purpose of adjusting the position of the auxiliary roller 110. When the auxiliary roller 110 abuts against the electrode 500 under the drive of the adjustment assembly 120, the auxiliary roller 110 is in a working state, flattening the electrode 500 through contact with it.

[0044] like Figure 2 and Figure 3As shown, the adjustment component 120 in this embodiment includes at least two connecting rods 121, and the position adjustment range of the auxiliary roller 110 is large, so that the tension of the auxiliary roller 110 on the electrode 500 can be adjusted within a large range, making it more flexible to use and better able to eliminate wrinkles.

[0045] For example, such as Figure 2 As shown, the adjustment assembly 120 includes three connecting rods 121. For ease of explanation, the three connecting rods 121 are designated as first connecting rod 121a, second connecting rod 121b, and third connecting rod 121c. One end of the second connecting rod 121b is rotatably connected to the first connecting rod 121a, and the other end of the second connecting rod 121b is rotatably connected to the third connecting rod 121c. The third connecting rod 121c is connected to the auxiliary roller 110. By setting three connecting rods 121, the adjustment assembly 120 has two rotation axes, making the attitude adjustment of the adjustment assembly 120 more flexible and facilitating the adjustment of the position of the auxiliary roller 110 as needed.

[0046] In other embodiments, the number of links 121 in the adjusting assembly 120 can be adjusted as needed, and is not limited here.

[0047] In some embodiments, two adjustment components 120 are provided, which are arranged opposite to each other. The ends of the two adjustment components 120 are respectively connected to one axial end of the auxiliary roller 110. The two adjustment components 120 respectively drive the two axial ends of the auxiliary roller 110 to move, thereby avoiding the deflection of the auxiliary roller 110 and improving the positional accuracy of the auxiliary roller 110.

[0048] In some embodiments, such as Figure 3 As shown, two adjacent links 121 are rotatably connected by a connecting structure, which can lock or unlock the two adjacent links 121. The connecting structure not only serves to rotatably connect the two adjacent links 121, but also locks and unlocks the two connected links 121, which helps to simplify the structure and reduce costs.

[0049] For example, the connection structure includes a connecting bolt 123 and a connecting nut 122. The connecting bolt 123 passes through two adjacent connecting rods 121 in sequence and is threadedly connected to the connecting nut 122. When the connecting nut 122 is loosened, the connecting bolt 123 can serve as the rotation axis of the two connecting rods 121 connected to it, and the two connecting rods 121 can rotate around the connecting bolt 123 to adjust the posture of the adjustment assembly 120. When the connecting nut 122 is tightened, the connecting nut 122 cooperates with the connecting bolt 123 to lock the two adjacent connecting rods 121, restricting the relative rotation of the two connecting rods 121, thereby fixing the posture of the adjustment assembly 120 and the position of the auxiliary roller 110.

[0050] To improve the fixing effect of the connecting structure on the two adjacent connecting rods 121, the connecting bolt 123 can be threadedly connected to one of the two connecting rods 121 it is connected to. That is, of the two adjacent connecting rods 121, one connecting rod 121 is provided with a smooth through hole, and the other connecting rod 121 is provided with a threaded hole. The connecting bolt 123 passes through the through hole and is screwed into the threaded hole, and then is connected to the connecting nut 122.

[0051] For example, the connection structure may include a connecting shaft and a clamp. The connecting shaft includes a head and a rod that are connected together. The rod passes through two connected connecting rods 121 in sequence. The end of the rod away from the head engages with the clamp. The clamp and the head are located on opposite sides of the two connecting rods 121. The two connecting rods 121 are clamped together by the clamp and the head, thereby fixing the two adjacent connecting rods 121.

[0052] In some embodiments, the connection structure may include a rotating shaft and a locking element. Two adjacent connecting rods 121 are rotatably connected via the rotating shaft, and one of the two adjacent connecting rods 121 is movably provided with a locking element. The locking element can be detachably connected to the other connecting rod 121 to fix the two adjacent connecting rods 121. When it is necessary to adjust the position of the auxiliary roller 110, the locking element is disengaged from the other connecting rod 121, thereby unlocking the two adjacent connecting rods 121. After adjusting the included angle of the two adjacent connecting rods 121, the locking element is connected to the other connecting rod 121 to fix the two connecting rods 121.

[0053] Optionally, in two adjacent links 121, one link 121 is provided with a sliding part extending circumferentially along the axis of rotation, and the locking member is slidably connected to the sliding part, so as to facilitate the adjustment of the position of the locking member on the sliding part according to the included angle between the two links 121, thereby ensuring that the locking member can be connected to the other link 121.

[0054] For example, the sliding part can be a slide groove or a slide rail, as long as the position of the locking member can be adaptively adjusted as the connecting rod 121 rotates.

[0055] For example, the locking element can be a screw, pin, or bolt and nut structure, and another connecting rod 121 is provided with a connecting hole that mates with the locking element. The connecting hole can be a pin hole or a threaded hole. The locking element can also be a snap-fit ​​element that snaps into another connecting rod 121. For example, the locking element is a pawl, and the other connecting rod 121 is provided with a snap-fit ​​hole that mates with the pawl.

[0056] Taking the locking component as a bolt and nut structure as an example, when the position of the auxiliary roller 110 needs to be adjusted, the bolt is disassembled from the other connecting rod 121, and the included angle between the two connecting rods 121 is adjusted. During this process, the bolt slides adaptively along the sliding part. After the auxiliary roller 110 is adjusted to the appropriate position, the bolt is passed through the connecting hole on the other connecting rod 121 and connected to the nut. The two adjacent connecting rods 121 are clamped and fixed by the head of the nut and the bolt to fix the position of the auxiliary roller 110.

[0057] In some embodiments, such as Figure 4 As shown, the auxiliary roller mechanism 100 also includes a fixing member 130 for mounting the adjusting assembly 120. The fixing member 130 is fixed to a designated mounting position of the pressure roller device, for example, it can be set on the frame 200 of the pressure roller device.

[0058] In some embodiments, such as Figure 4 As shown, multiple fixing structures 132 are spaced apart along the axial direction of the auxiliary roller 110 on the fixing member 130, and the adjusting component 120 can be switched to be connected to any of the fixing structures 132. By setting multiple fixing structures 132, not only can the position of the adjusting component 120 along the axial direction of the auxiliary roller 110 be adjusted, but also the distance between two adjusting components 120 can be adjusted, thereby accommodating auxiliary rollers 110 of different lengths.

[0059] Optionally, the fixing structure 132 includes a fixing hole 1321, which can mate with a fastener to connect the fixing member 130 to the adjusting assembly 120. Specifically, the fastener connects the fixing member 130 to the first connecting rod 121a in the adjusting assembly 120. The fastener can be a screw or a pin.

[0060] Optionally, each fixing structure 132 may include at least two fixing holes 1321 to improve the fixing effect on the fastener 130.

[0061] In some embodiments, the fixing member 130 is provided with a limiting groove 131, which is a strip-shaped groove extending along the axial direction of the auxiliary roller 110. The adjusting component 120 can be inserted into the limiting groove 131 to limit the position of the adjusting component 120 in the width direction (i.e., the direction perpendicular to the axial direction of the auxiliary roller 110) of the limiting groove 131. Multiple fixing structures 132 are arranged at intervals in the limiting groove 131 along the length direction (i.e., the direction along the axial direction of the auxiliary roller 110).

[0062] In some embodiments, the outer diameter of the auxiliary roller 110 is equal along its axial direction, that is, the auxiliary roller 110 is a constant diameter roller.

[0063] In some embodiments, such as Figure 2 and Figure 3As shown, the outer diameter of the auxiliary roller 110 gradually decreases from the middle to both ends along the axial direction. That is to say, the outer diameter of the auxiliary roller 110 is variable. The outer diameter of the auxiliary roller 110 at the middle position is large, which is used to contact the coating 520 on the electrode 500, and can further compact the coating 520 and improve the rolling effect. The outer diameter of the auxiliary roller 110 at both ends along the axial direction is small, which is used to contact the two side edges of the electrode 500, and can smooth out defects such as wrinkles and wavy edges of the electrode 500.

[0064] It should be noted that the two ends of the substrate 510 in the electrode 500 are not covered by the coating 520. During the coating process, the middle of the substrate 510 can be stretched by the roller, but the stretching effect on the opposite sides of the substrate 510 is insufficient, which can easily cause the opposite sides of the substrate 510 to bend. This causes the cross-section of the substrate 510 along the axial direction of the auxiliary roller 110 to extend in an arc shape. When the auxiliary roller 110 is a roller of equal diameter, the arc-shaped electrode 500 can be flattened in advance to ensure that the force on the electrode 500 is basically consistent throughout during winding, thereby reducing defects such as wrinkles and wavy edges on the electrode 500.

[0065] Furthermore, since the central roll of the substrate 510 can be stretched, while the stretching effect on the opposite sides of the substrate 510 is insufficient, the unstretched foil area of ​​the substrate 510 becomes the main stress area during winding. Therefore, when the outer diameter of the auxiliary roller 110 gradually decreases from the middle to both ends along the axial direction, by setting the outer diameter of the auxiliary roller 110 at both ends to be smaller, the stress on the axial ends of the substrate 510 can be reduced, preventing the axial ends of the substrate 510 from tearing or folding due to excessive stress, and improving the flattening effect on the opposite sides of the substrate 510.

[0066] In some embodiments, a centerline is defined as a line passing through the midpoint of the length direction of the auxiliary roller 110 and perpendicular to the axis of the auxiliary roller 110, and the auxiliary roller 110 is symmetrical about the centerline. The symmetrical structure of the auxiliary roller 110 helps to ensure that the electrode sheet 500 has a better flattening effect on both sides.

[0067] like Figure 5 and Figure 6As shown, the auxiliary roller 110 includes a central rod 111 and an outer roller 112. The outer roller 112 is rotatably mounted on the central rod 111, which is connected to the adjusting assembly 120. The outer diameter of the outer roller 112 gradually decreases from the middle to both ends. When the auxiliary roller 110 contacts the electrode 500, the electrode 500 moves under the action of the winding mechanism 400 and the unwinding mechanism 300, causing the electrode 500 to move relative to the auxiliary roller 110. The outer roller 112 can adaptively rotate under the frictional force provided by the electrode 500, ensuring that it can apply a contact force to the electrode 500, thereby flattening the electrode 500 through roller pressing, while also reducing the frictional force between the electrode 500 and the auxiliary roller 110, avoiding damage to the electrode 500 due to excessive friction.

[0068] To improve the stability of the auxiliary roller 110, both ends of the center rod 111 extend out of the outer roller 112, and both ends of the center rod 111 are connected to the adjustment assembly 120, making the auxiliary roller 110 more stable.

[0069] To reduce the friction between the outer roller 112 and the central rod 111, a bearing 113 is installed inside the outer roller 112. The bearing 113 is sleeved on the outside of the central rod 111 to achieve a rotatable connection between the outer roller 112 and the central rod 111. Specifically, the bearing 113 includes an inner ring and an outer ring that are rotatably fitted. The inner ring is coaxially fixed to the central rod 111, and the outer ring is coaxially fixed to the outer roller 112, thereby providing rotational support for the outer roller 112.

[0070] In some embodiments, in order to improve the stability of the rotational engagement between the outer roller 112 and the central rod 111, bearings 113 are provided at both axial ends inside the outer roller 112 to support the outer roller 112 through the axial ends of the outer roller 112, so that the outer roller 112 is subjected to more uniform force and can better flatten the electrode sheet 500.

[0071] To limit the axial position of the outer roller 112 on the central rod 111, retaining rings 114 are fitted at both ends of the central rod 111 along its axial direction, with the outer roller 112 positioned between the retaining rings 114 on both sides. By limiting the axial position of the outer roller 112 on the central rod 111 through the two retaining rings 114, the fitting accuracy between the outer roller 112 and the electrode 500 can be improved, allowing the middle part of the outer roller 112 along its axial direction to abut against the middle part of the electrode 500, thereby improving the flattening effect of the outer roller 112 on the edge of the electrode 500.

[0072] In some embodiments, the auxiliary roller mechanism 100 is disposed downstream of the pressure roller mechanism, that is, the auxiliary roller mechanism 100 is disposed between the pressure roller mechanism and the winding mechanism 400. Preferably, the auxiliary roller mechanism 100 is disposed close to the winding mechanism 400, so that the electrode sheet 500 passes through the pressure roller mechanism first and then through the auxiliary roller mechanism 100, so that it can be quickly wound up after being flattened.

[0073] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An auxiliary roller mechanism, characterized in that, include: An auxiliary roller (110) is used to abut against the electrode sheet (500); An adjustment assembly (120) is movably connected to the auxiliary roller (110). The adjustment assembly (120) includes at least two connecting rods (121) that are rotatably connected in sequence. The included angle between two adjacent connecting rods (121) is adjustable. The adjustment assembly (120) is used to adjust the position of the auxiliary roller (110) so that the outer peripheral surface of the auxiliary roller (110) can abut or separate from the electrode (500).

2. The auxiliary roller mechanism according to claim 1, characterized in that, Two adjacent links (121) are rotatably connected by a connecting structure, and the connecting structure is capable of locking or unlocking the two links (121) connected to it.

3. The auxiliary roller mechanism according to claim 2, characterized in that, The connection structure includes a connecting bolt (123) and a connecting nut (122). Along the axial direction of the auxiliary roller (110), the connecting bolt (123) passes through two adjacent connecting rods (121) in sequence and is threadedly connected to the connecting nut (122).

4. The auxiliary roller mechanism according to claim 2, characterized in that, The connection structure includes a rotating shaft and a locking element. Two adjacent connecting rods (121) are rotatably connected through the rotating shaft. One of the two adjacent connecting rods (121) is movably provided with the locking element, and the locking element is detachably connected to the other connecting rod (121).

5. The auxiliary roller mechanism according to claim 1, characterized in that, The adjustment assembly (120) includes three connecting rods (121) rotatably connected in sequence. The three connecting rods (121) are a first connecting rod (121a), a second connecting rod (121b), and a third connecting rod (121c). One end of the second connecting rod (121b) is rotatably connected to the first connecting rod (121a), and the other end of the second connecting rod (121b) is rotatably connected to the third connecting rod (121c). The third connecting rod (121c) is connected to the auxiliary roller (110).

6. The auxiliary roller mechanism according to any one of claims 1-5, characterized in that, The auxiliary roller mechanism also includes a fixing member (130), on which a plurality of fixing structures (132) are spaced apart along the axial direction of the auxiliary roller (110), and the adjusting component (120) can be switched to be connected to any of the fixing structures (132).

7. The auxiliary roller mechanism according to any one of claims 1-5, characterized in that, The outer diameter of the auxiliary roller (110) is equal along the axial direction; Alternatively, the outer diameter of the auxiliary roller (110) gradually decreases from the middle to both ends along the axial direction.

8. The auxiliary roller mechanism according to any one of claims 1-5, characterized in that, The auxiliary roller (110) includes: A center rod (111) is connected to the adjustment assembly (120); The outer roller (112) is rotatably sleeved on the central rod (111), and the outer roller (112) is used to abut against the electrode (500).

9. The auxiliary roller mechanism according to claim 8, characterized in that, The outer roller (112) is provided with a bearing (113), and the bearing (113) is sleeved on the central rod (111); And / or, the auxiliary roller (110) further includes retaining rings (114), and the retaining rings (114) are sleeved on both axial ends of the central rod (111), and the outer roller (112) is located between the retaining rings (114) on both sides.

10. A pressure roller device, characterized in that, It includes a winding mechanism (400), an unwinding mechanism (300), and an auxiliary roller mechanism as described in any one of claims 1-9, wherein the auxiliary roller mechanism is disposed between the winding mechanism (400) and the unwinding mechanism (300).

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