Tab flattening follow-up device and lithium battery winding machine
By designing the pole ear smoothing follower device, the coordination of the follower roller and counterweight parts is used to solve the problem of the pole ear folding and damage during the lithium battery winding process, and the stable transmission of the pole piece and effective guidance of the pole ear are achieved.
Patent Information
- Application Number
- CN202420662288.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-04-02
AI Technical Summary
During the winding process of lithium battery, extreme ears are prone to folding and damage during the transmission process, and the prior art is difficult to effectively avoid.
An extreme ear smoothing follower device is designed, including a through roller shaft, a through roller, a support plate, a follower roller, a counterweight and a smoothing plate. Through the movement of the follower roller and the gravity of the counterweight, the pole sheet ensures that the pole sheet contacts the extreme ear in the smoothing channel and prevents folding.
It effectively avoids the folding and damage of the electrode ear during the transmission process, ensures that the electrode sheet remains tight during the rolling and unwinding of materials of different diameters, and improves the production stability of the lithium battery winder.
Smart Images
Figure CN223092920U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to an ear flattening follow-up device and a lithium battery winding machine. Background Art
[0002] Due to its performance such as high working voltage, large specific energy, small volume, light weight, long cycle life, low self-discharge rate, no memory effect, and no pollution, lithium batteries are widely used in various fields. And the rapid development of lithium battery production is increasingly dependent on its equipment. The main production method of the battery core is through winding. The lithium battery winding machine is gradually favored by lithium-ion battery core manufacturers due to its wide adaptability, convenient operation, low cost and other advantages.
[0003] Among them, the pre-wound pole piece of the lithium battery winding machine can have ears or no ears. At present, when the pole piece with ears passes through the roller, due to the continuous change of the unwinding coil diameter, the ears are very easy to fold during the transmission process, causing the ears to be over-deformed or even damaged.
[0004] Therefore, the present application provides a new ear flattening follow-up device and a lithium battery winding machine for the above problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide an ear flattening follow-up device to avoid the ears of the pole piece from folding and being damaged during the transmission process.
[0006] The purpose of the utility model is also to provide a lithium battery winding machine to further avoid the ears of the pole piece from folding and being damaged during the transmission process.
[0007] Based on the above first purpose, the utility model provides an ear flattening follow-up device, which includes a roller shaft, a roller, a support plate, a follow-up roller, a counterweight and a flattening plate;
[0008] The roller and the support plate are rotatably installed on the roller shaft;
[0009] The follow-up roller is rotatably installed on the support plate, the counterweight is arranged on the support plate, and the counterweight and the follow-up roller are respectively arranged on both sides of the axis direction of the roller shaft;
[0010] The flattening plate is installed on the support plate, and a flattening channel for the pole piece to pass through is formed between the flattening plate and the roller surface of the roller. The pole piece can pass through from the side of the follow-up roller close to the roller and enter the flattening channel.
[0011] Further, the rotation axis of the follow-up roller is parallel to the axis of the roller shaft.
[0012] Further, a smooth transition is provided at the side of the flattening plate close to the guiding roller.
[0013] Further, along the running direction of the pole piece, the side of the flattening plate close to the guiding roller sequentially includes an inlet guiding surface, a flattening surface, and an outlet guiding surface, and the flattening surface is parallel to the roller surface of the guiding roller;
[0014] Wherein, one side of the inlet guiding surface away from the flattening surface is bent away from the roller surface of the guiding roller, and / or, one side of the outlet guiding surface away from the flattening surface is bent away from the roller surface of the guiding roller.
[0015] Further, the connection line between the center of the guiding roller shaft and the center of the follower roller is the first connection line, and the connection line between the center of the guiding roller shaft and the center of gravity of the counterweight is the second connection line;
[0016] The follower roller is movably installed on the support plate, and the moving direction is along the first connection line towards or away from the guiding roller shaft; and / or, the counterweight is movably installed on the support plate, and the moving direction is along the second connection line towards or away from the guiding roller shaft.
[0017] Further, an installation long groove extending along the direction of the first connection line is provided on the support plate, and the roller shaft of the follower roller is arranged in the installation long groove and can move and be locked in the installation long groove.
[0018] Further, an installation structure for installing the counterweight is provided on the support plate, there are a plurality of the installation structures, and the plurality of installation structures are arranged at intervals along the direction of the second connection line.
[0019] Further, the support plate includes a main part, the main part extends outward along a first direction to form a first extension part, the main part extends outward along a second direction to form a second extension part, the main part extends outward along a third direction to form a third extension part, the guiding roller shaft is installed on the main part, the follower roller is installed on the first extension part, the counterweight is installed on the second extension part, and the flattening plate is installed on the third extension part;
[0020] Wherein, the first direction is the extending direction of the first connection line, the second direction is the extending direction of the second connection line, and the third direction is between the first direction and the second direction.
[0021] Adopting the above technical solution, the pole ear flattening and following device of the present utility model at least has the following beneficial effects:
[0022] In this tab ear flattening and following device, when the tabbed electrode released from the material roll passes through from the side of the follower roller close to the passing roller, the follower roller is located below the tabbed electrode to support the tabbed electrode, and the follower roller is also used to assist the tabbed electrode in changing its direction so that the tabbed electrode can better enter the flattening channel. After being flattened by the flattening channel, the tabbed electrode is conveyed to the next station.
[0023] Among them, since the counterweight and the follower roller are respectively arranged on both sides of the axis direction of the passing roller shaft, under the action of the gravity of the counterweight, the support plate has a certain eccentric self-weight, which can drive the follower roller to always have a tendency to move towards the direction close to the tabbed electrode. Therefore, when the tabbed electrode enters the flattening channel from the side of the follower roller close to the passing roller, the roller surface of the follower roller can always be in contact with the tabbed electrode to support the tabbed electrode, and the follower roller can follow with the tabbed electrode.
[0024] With such a setting, after the tabbed electrode enters the flattening channel, the flatting plate and the roller surface of the passing roller cooperate with each other to guide and flatten the tab ears to prevent the tab ears from being folded and damaged. In addition, during the process of unwinding the material roll, the diameter of the material roll gradually becomes smaller, causing the inclination angle of the tabbed electrode at the unwinding position to change accordingly, and the walking trajectory of the tab ears on the tabbed electrode also changes, that is, the tabbed electrode at the unwinding position gradually moves away from the roller surface of the follower roller, so a gap appears between the tabbed electrode and the follower roller, releasing the tabbed electrode's restraint on the follower roller. At this time, the counterweight drives the support plate to rotate under the action of gravity, so that the follower roller moves towards the direction close to the tabbed electrode until the follower roller contacts the tabbed electrode to guide the tabbed electrode and keep the tabbed electrode in a taut state.
[0025] In summary, the tab ear flattening and following device of this embodiment can adjust the position state of the support plate and the follower roller according to the unwinding diameter of the material roll to ensure that the tab ear flattening and following device can accurately and reliably guide and flatten the tab ears on the passing tabbed electrode, thereby avoiding the tab ears from being folded.
[0026] Based on the above second object, the present invention provides a lithium battery winding machine, which includes an unwinding device and the above-mentioned tab ear flattening and following device. The unwinding device includes a material roll shaft for installing the material roll, and the tabbed electrode released from the material roll can pass through from the side of the follower roller of the tab ear flattening and following device close to the passing roller and enter the flattening channel.
[0027] Further, the tab ear flattening and following device is arranged close to the unwinding device.
[0028] Adopting the above technical solution, the lithium battery winding machine of the present invention has at least the following beneficial effects:
[0029] By arranging the above-mentioned tab ear flattening and following device in the lithium battery winding machine, correspondingly, the lithium battery winding machine has all the advantages of the above-mentioned tab ear flattening and following device, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0031] Figure 1 One of the structural schematic diagrams of the tab flattening follower device provided by the embodiment of the present utility model (the over-roller is not shown);
[0032] Figure 2 Another structural schematic diagram of the tab flattening follower device provided by the embodiment of the present utility model (the over-roller is not shown);
[0033] Figure 3 Structural schematic diagram of the support plate of the tab flattening follower device provided by the embodiment of the present utility model;
[0034] Figure 4 One of the structural schematic diagrams of the lithium battery winding machine provided by the embodiment of the present utility model;
[0035] Figure 5 For Figure 4 Partial structural schematic diagram of the lithium battery winding machine shown;
[0036] Figure 6 Another structural schematic diagram of the lithium battery winding machine provided by the embodiment of the present utility model;
[0037] Figure 7 For Figure 6 Partial structural schematic diagram of the lithium battery winding machine shown;
[0038] Figure 8 Another structural schematic diagram of the lithium battery winding machine provided by the embodiment of the present utility model;
[0039] Figure 9 For Figure 8 Partial structural schematic diagram of the lithium battery winding machine shown.
[0040] Reference numerals:
[0041] 100 - tab flattening follower device;
[0042] 110 - over-roller shaft;
[0043] 120 - over-roller;
[0044] 130 - Support plate; 131 - Installation long slot; 132 - Installation structure; 133 - Main part; 134 - First extension part; 135 - Second extension part; 136 - Third extension part;
[0045] 140 - Follow-up roller;
[0046] 150 - Counterweight;
[0047] 160 - Screed; 161 - Inlet guiding surface; 162 - Screeding surface; 163 - Outlet guiding surface;
[0048] 200 - Coil of material;
[0049] 300 - Electrode tab;
[0050] L1 - First connection line; L2 - Second connection line. Detailed implementation manner
[0051] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0052] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0053] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0054] Embodiment 1
[0055] Please refer to Figure 1 and in combination with Figure 4 and Figure 5, this embodiment provides an ear flattening follow-up device 100, which includes a passing roller shaft 110, a passing roller 120, a support plate 130, a follow-up roller 140, a counterweight 150, and a flattening plate 160; the passing roller 120 and the support plate 130 are rotatably mounted on the passing roller shaft 110; the follow-up roller 140 is rotatably mounted on the support plate 130, the counterweight 150 is arranged on the support plate 130, and the counterweight 150 and the follow-up roller 140 are respectively arranged on both sides of the axis direction of the passing roller shaft 110; the flattening plate 160 is mounted on the support plate 130, and a flattening channel for the pole piece 300 to pass through is formed between the flattening plate 160 and the roller surface of the passing roller 120, and the pole piece 300 can pass through from the side of the follow-up roller 140 close to the passing roller 120 and enter the flattening channel.
[0056] In the ear flattening follow-up device 100, when the pole piece 300 released from the material roll 200 passes through from the side of the follow-up roller 140 close to the passing roller 120, the follow-up roller 140 is located below the pole piece 300 to support the pole piece 300, and the follow-up roller 140 is also used to assist the pole piece 300 to change its direction, so that the pole piece 300 can better enter the flattening channel, and the pole piece 300 is flattened by the flattening channel and then conveyed to the next station.
[0057] Among them, since the counterweight 150 and the follow-up roller 140 are respectively arranged on both sides of the axis direction of the passing roller shaft 110, under the action of the gravity of the counterweight 150, the support plate 130 has a certain eccentric self-weight, which can drive the follow-up roller 140 to always have a tendency to move towards the direction close to the pole piece 300. Therefore, when the pole piece 300 enters the flattening channel from the side of the follow-up roller 140 close to the passing roller 120, the roller surface of the follow-up roller 140 can always be in contact with the pole piece 300 to support the pole piece 300, and the follow-up roller 140 can follow the pole piece 300.
[0058] With such a setting, after the pole piece 300 enters the flattening channel, the flattening plate 160 and the roller surface of the passing roller 120 cooperate with each other to be able to guide and flatten the ear to prevent the ear from being folded and damaged. In addition, please refer to Figure 6 and Figure 7 , during the process of unwinding the material roll 200, the diameter of the material roll 200 will gradually become smaller, so that the inclination angle of the pole piece 300 at the unwinding place changes accordingly, and the walking track of the ear on the pole piece 300 also changes, that is, the pole piece 300 at the unwinding place gradually moves away from the roller surface of the follow-up roller 140, so that a gap appears between the pole piece 300 and the follow-up roller 140, and the pole piece 300 releases the restraint on the follow-up roller 140. At this time, the counterweight 150 drives the support plate 130 to rotate under the action of gravity, so that the follow-up roller 140 moves towards the direction close to the pole piece 300 until the follow-up roller 140 contacts the pole piece 300 to guide the pole piece 300 and keep the pole piece 300 in a taut state.
[0059] In summary, the tab flattening follower device 100 of this embodiment can adjust the position states of the support plate 130 and the follower roller 140 according to the unwind diameter of the material roll 200, so as to ensure that the tab flattening follower device 100 can accurately and reliably guide and flatten the tabs on the passing pole piece 300, thereby avoiding the tabs from being folded over.
[0060] Preferably, in this embodiment, the rotation axis of the follower roller 140 is parallel to the axis of the roller shaft 110, so as to prevent the pole piece 300 from being bent and deformed when the pole piece 300 passes through the side of the follower roller 140 close to the over-roller 120 and enters the flattening channel.
[0061] Preferably, please refer to Figure 2 , in this embodiment, the surface of the flattening plate 160 close to the over-roller 120 has a smooth transition. With such a setting, after the pole piece 300 enters the flattening channel, the flattening plate 160 can better guide the pole piece 300 and ensure that the tabs on the pole piece 300 will not be folded over.
[0062] Preferably, please refer to Figure 2 , in this embodiment, along the traveling direction of the pole piece 300, the surface of the flattening plate 160 close to the over-roller 120 sequentially includes an inlet guiding surface 161, a flattening surface 162, and an outlet guiding surface 163, and the flattening surface 162 is parallel to the roller surface of the over-roller 120.
[0063] Among them, optionally, the side of the inlet guiding surface 161 away from the flattening surface 162 bends away from the roller surface of the over-roller 120, or the side of the outlet guiding surface 163 away from the flattening surface 162 bends away from the roller surface of the over-roller 120. Preferably, the side of the inlet guiding surface 161 away from the flattening surface 162 bends away from the roller surface of the over-roller 120, and the side of the outlet guiding surface 163 away from the flattening surface 162 bends away from the roller surface of the over-roller 120.
[0064] Among them, the flattening surface 162 is parallel to the roller surface of the over-roller 120, and the flattening surface 162 and the roller surface of the over-roller 120 cooperate to guide and flatten the tabs to prevent the tabs from being folded over and damaged; the side of the inlet guiding surface 161 away from the flattening surface 162 bends away from the roller surface of the over-roller 120, and the side of the outlet guiding surface 163 away from the flattening surface 162 bends away from the roller surface of the over-roller 120, so that a gap for guiding the tabs to easily enter the flattening channel is formed between the inlet guiding surface 161 and the roller surface of the over-roller 120, and between the outlet guiding surface 163 and the roller surface of the over-roller 120, and the guiding effect on the tabs is achieved during both the unwind and rewind processes.
[0065] Preferably, please refer to Figure 3, in this embodiment, the line connecting the centers of the over-roller shaft 110 and the follower roller 140 is the first connecting line L1, and the line connecting the center of the over-roller shaft 110 and the center of gravity of the counterweight 150 is the second connecting line L2.
[0066] Optionally, the follower roller 140 is movably mounted on the support plate 130, and the moving direction is along the first connecting line L1 towards or away from the over-roller shaft 110; or the counterweight 150 is movably mounted on the support plate 130, and the moving direction is along the second connecting line L2 towards or away from the over-roller shaft 110. Preferably, the follower roller 140 is movably mounted on the support plate 130, and the moving direction is along the first connecting line L1 towards or away from the over-roller shaft 110, and the counterweight 150 is movably mounted on the support plate 130, and the moving direction is along the second connecting line L2 towards or away from the over-roller shaft 110.
[0067] With such a setting, the positions of the counterweight 150 and the follower roller 140 on the support plate 130 are adjustable, so that the ear flattening follower device 100 can better adapt to pole pieces 300 of different diameter specifications and coils 200.
[0068] Preferably, please refer to Figure 1 , in this embodiment, the support plate 130 is provided with an installation long groove 131 extending along the direction of the first connecting line L1. The roller shaft of the follower roller 140 is arranged in the installation long groove 131 and can move and be locked in the installation long groove 131.
[0069] With such a setting, by moving and locking the roller shaft of the follower roller 140 in the installation long groove 131, the position of the follower roller 140 on the support plate 130 can be adjusted. Optionally, the roller shaft of the follower roller 140 and the support plate 130 can be locked in position by a locking bolt.
[0070] Preferably, please refer to Figure 2 , in this embodiment, the support plate 130 is provided with an installation structure 132 for installing the counterweight 150. There are multiple installation structures 132, and the multiple installation structures 132 are arranged at intervals along the direction of the second connecting line L2.
[0071] Optionally, the connection structure is a connection hole, a connection groove or a connection stud, etc. Preferably, please refer to Figure 3 , in this embodiment, the connection structure includes a plurality of connection holes all used for connecting with the counterweight 150.
[0072] In this embodiment, the connection structure is set as a plurality of connection holes, so that the counterweight 150 can be connected with the connection holes by bolts. Of course, a corresponding connection shaft can also be provided on the counterweight 150 to connect with the connection holes.
[0073] Preferably, please refer toFigure 3 , in this embodiment, the support plate 130 includes a main part 133. The main part 133 extends outward along a first direction to form a first extension part 134, extends outward along a second direction to form a second extension part 135, and extends outward along a third direction to form a third extension part 136. The passing roller 110 is installed on the main part 133, the follower roller 140 is installed on the first extension part 134, the counterweight 150 is installed on the second extension part 135, and the screed 160 is installed on the third extension part 136. Among them, the first direction is the extending direction of the first connection line L1, the second direction is the extending direction of the second connection line L2, and the third direction is located between the first direction and the second direction.
[0074] Embodiment Two
[0075] Embodiment Two provides a lithium battery winding machine. The lithium battery winding machine includes the tab flattening and following device 100 of Embodiment One. The technical features of the tab flattening and following device 100 disclosed in Embodiment One are also applicable to this embodiment, and the technical features of the tab flattening and following device 100 already disclosed in Embodiment One will not be described repeatedly. The following further details the implementation manner of the lithium battery winding machine with reference to the drawings.
[0076] Please refer to Figure 4 , the lithium battery winding machine provided in this embodiment includes an unwinding device and the above-mentioned tab flattening and following device 100. The unwinding device includes a material roll shaft for installing the material roll 200. The electrode tab 300 released from the material roll 200 can pass through from the side of the follower roller 140 close to the passing roller 120 of the tab flattening and following device 100 and enter the flattening channel. This lithium battery winding machine further avoids the folding and damage of the electrode tab during the transmission process of the electrode tab 300.
[0077] The following combines Figures 4 to 9 to describe the working process of the lithium battery winding machine:
[0078] First, install the material roll 200 on the material roll shaft, and make the electrode tab 300 released from the material roll 200 pass through from the side of the follower roller 140 close to the passing roller 120 and enter the flattening channel. At this time, due to the constant action of gravity on the counterweight 150, the counterweight 150 has a tendency to move downward to drive the follower roller 140 to move towards the electrode tab 300. However, due to the restraint of the electrode tab 300, the counterweight 150 cannot continue to drive the follower roller 140 to move, so that the support plate 130 reaches a state of dynamic balance.
[0079] Refer to Figure 4 and Figure 5 , and combine with Figure 6 and Figure 7, when the material reel unwinds the material roll 200 in the first rotation direction, since the diameter of the material roll 200 gradually decreases, the inclination angle of the pole piece 300 at the unwound position also changes accordingly. The pole piece 300 moves away from the follower roller 140, and a gap begins to appear between the pole piece 300 and the follower roller 140. However, at this time, the pole piece 300 releases the restraint on the follower roller 140, causing the counterweight 150 to drive the support plate 130 to rotate in the second direction under the action of gravity, so that the follower roller 140 moves towards the pole piece 300 until the follower roller 140 abuts against the pole piece 300 to guide the pole piece 300 and keep the pole piece 300 in a taut state.
[0080] Similarly, referring to Figure 8 and Figure 9 , when the material reel unwinds the material roll 200 in the second rotation direction, since the diameter of the material roll 200 gradually decreases, the inclination angle of the pole piece 300 unwound also changes accordingly. The pole piece 300 moves closer to the follower roller 140, and the follower roller 140 moves towards the pole piece 300 under the action of the counterweight 150, so that the follower roller 140 is in close contact with the pole piece 300 to guide the pole piece 300 and keep the pole piece 300 in a taut state, where the first rotation direction is opposite to the second rotation direction.
[0081] In summary, it can be seen that the lithium battery winding machine of this embodiment can be applicable to the material reel that unwinds the material roll 200 in both the first rotation direction and the second rotation direction.
[0082] Preferably, in this embodiment, the tab flattening follower device 100 is arranged close to the unwinding device.
[0083] With such an arrangement, by arranging the tab flattening follower device 100 close to the unwinding device, the position between the tab flattening follower device 100 and the unwinding device is relatively close, so that the layout span between the tab flattening follower device 100 and the unwinding device is small, thereby reducing the length of the lithium battery winding machine in the transverse direction and facilitating the layout of other structural devices of the lithium battery winding machine.
[0084] The lithium battery winding machine of this embodiment has the advantages of the tab flattening follower device 100 in Embodiment 1, and these advantages have been described in detail in Embodiment 1 and will not be repeated here.
[0085] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A tab flattening follow-up device, characterized in that, It includes a passing roller shaft (110), a passing roller (120), a support plate (130), a follower roller (140), a counterweight (150) and a flattening plate (160); The passing roller (120) and the support plate (130) are rotatably mounted on the passing roller shaft (110); The follower roller (140) is rotatably mounted on the support plate (130), the counterweight (150) is arranged on the support plate (130), and the counterweight (150) and the follower roller (140) are respectively arranged on both sides of the passing roller shaft (110) in the axial direction; The flattening plate (160) is mounted on the support plate (130), and a flattening channel for the pole piece (300) to pass through is formed between the flattening plate (160) and the roller surface of the passing roller (120). The pole piece (300) can pass through from the side of the follower roller (140) close to the passing roller (120) and enter the flattening channel.
2. The tab flattening follower device according to claim 1, characterized in that, The rotation axis of the follower roller (140) is parallel to the axis of the passing roller shaft (110).
3. The tab flattening follower device according to claim 1, characterized in that, The surface of the flattening plate (160) close to the passing roller (120) has a smooth transition.
4. The tab flattening follow-up device according to claim 3, wherein, Along the traveling direction of the pole piece (300), the surface of the flattening plate (160) close to the passing roller (120) sequentially includes an inlet guiding surface (161), a flattening surface (162) and an outlet guiding surface (163), and the flattening surface (162) is parallel to the roller surface of the passing roller (120); Wherein, the side of the inlet guiding surface (161) far from the flattening surface (162) bends away from the roller surface of the passing roller (120), and / or, the side of the outlet guiding surface (163) far from the flattening surface (162) bends away from the roller surface of the passing roller (120).
5. The tab flattening follower device according to claim 1, wherein, The connection line between the center of the passing roller shaft (110) and the center of the follower roller (140) is the first connection line, and the connection line between the center of the passing roller shaft (110) and the center of gravity of the counterweight (150) is the second connection line; The follower roller (140) is movably mounted on the support plate (130), and the moving direction is along the first connection line towards or away from the passing roller shaft (110); and / or, the counterweight (150) is movably mounted on the support plate (130), and the moving direction is along the second connection line towards or away from the passing roller shaft (110).
6. The tab flattening follower device according to claim 5, characterized in that, An installation long slot (131) extending in the direction of the first connection line is provided on the support plate (130), and the roller shaft of the follower roller (140) is arranged in the installation long slot (131) and can move and be locked in the installation long slot (131).
7. The tab flattening follower device according to claim 5, characterized in that, An installation structure (132) for installing the counterweight (150) is provided on the support plate (130), there are a plurality of the installation structures (132), and the plurality of installation structures (132) are arranged at intervals in the direction of the second connection line.
8. The tab flattening follower device according to claim 5, characterized in that, The support plate (130) includes a main body (133). The main body (133) extends outward in a first direction to form a first extension portion (134), extends outward in a second direction to form a second extension portion (135), and extends outward in a third direction to form a third extension portion (136). The over-roller shaft (110) is installed on the main body (133), the follower roller (140) is installed on the first extension portion (134), the counterweight (150) is installed on the second extension portion (135), and the screed plate (160) is installed on the third extension portion (136). Wherein, the first direction is the extension direction of the first connection line, the second direction is the extension direction of the second connection line, and the third direction is located between the first direction and the second direction.
9. A lithium battery winding machine, characterized in that, It includes an unwinding device and the tab flattening and following device (100) according to any one of claims 1-8. The unwinding device includes a material roll shaft for installing a material roll (200). The tab (300) released from the material roll (200) can pass through from the side of the follower roller (140) of the tab flattening and following device (100) close to the over-roller (120) and enter the flattening channel.
10. The lithium battery winding machine according to claim 9, wherein The tab flattening and following device (100) is arranged close to the unwinding device.